diff options
Diffstat (limited to 'contrib/gcc/objc')
| -rw-r--r-- | contrib/gcc/objc/ChangeLog | 957 | ||||
| -rw-r--r-- | contrib/gcc/objc/Make-lang.in | 142 | ||||
| -rw-r--r-- | contrib/gcc/objc/README | 97 | ||||
| -rw-r--r-- | contrib/gcc/objc/config-lang.in | 40 | ||||
| -rw-r--r-- | contrib/gcc/objc/lang-specs.h | 54 | ||||
| -rw-r--r-- | contrib/gcc/objc/objc-act.c | 9518 | ||||
| -rw-r--r-- | contrib/gcc/objc/objc-act.h | 457 | ||||
| -rw-r--r-- | contrib/gcc/objc/objc-lang.c | 133 | ||||
| -rw-r--r-- | contrib/gcc/objc/objc-tree.def | 47 |
9 files changed, 11445 insertions, 0 deletions
diff --git a/contrib/gcc/objc/ChangeLog b/contrib/gcc/objc/ChangeLog new file mode 100644 index 0000000..7ce174f --- /dev/null +++ b/contrib/gcc/objc/ChangeLog @@ -0,0 +1,957 @@ +2007-07-19 Release Manager + + * GCC 4.2.1 released. + +2007-05-13 Release Manager + + * GCC 4.2.0 released. + +2007-01-23 Andrew Pinski <pinskia@gmail.com> + + PR objc/27438 + * objc-act.c (objc_add_static_instance): Mark the decl as + TREE_USED. + +2007-01-20 Andrew Pinski <pinskia@gmail.com> + + PR objc/30479 + * objc-act.c (hash_interface): Use IDENTIFIER_HASH_VALUE instead + of htab_hash_pointer. + (lookup_interface): Likewise. + (add_class): Likewise. + +2006-10-10 Brooks Moses <bmoses@stanford.edu> + + * Make-lang.in: Added empty "objc.pdf" target. + +2006-09-26 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/29195 + * objc-act.c (objc_push_parm): If we change the type of the + decl, relayout the decl. + +2006-09-19 Eric Christopher <echristo@apple.com> + + * objc-act.c (JBLEN): Rename to OBJC_JBLEN, + default to something innocuous. + (build_next_objc_exception_stuff): Rename JBLEN. + +2006-07-28 Volker Reichelt <reichelt@igpm.rwth-aachen.de> + + * Make-lang.in: Use $(HEADER_H) instead of header.h in dependencies. + +2006-07-19 Volker Reichelt <reichelt@igpm.rwth-aachen.de> + + PR obj-c++/28434 + * objc-act.c (lookup_and_install_protocols): Skip error_mark_nodes. + +2006-06-06 Mike Stump <mrs@apple.com> + + * objc-act.c: Remove prototype for objc_build_volatilized_type. + +2006-05-24 Mike Stump <mrs@apple.com> + + * objc-act.c (build_next_objc_exception_stuff): Use JBLEN instead of _JBLEN. + +2006-05-05 Volker Reichelt <reichelt@igpm.rwth-aachen.de> + + PR objc/27240 + * objc-act.c (objc_is_public): Return early on invalid type. + +2006-03-02 Fariborz Jahanian <fjahanian@apple.com> + + * objc-act.c (init_module_descriptor): Remove file name from + module descriptor. + (gen_type_name_0): Fix ICE when issuing warning. + +2006-02-20 Rafael Ávila de Espíndola <rafael.espindola@gmail.com> + * Make-lang.in (OBJC): Remove + (OBJECTIVE-C): Remove + (objective-c): Remove + (.PHONY): Remove objective-c and ObjC + +2005-12-14 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/25360 + * objc/objc-act.c (encode_type): Encode Complex types as 'j' followed + by the inner type. + +2005-12-12 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/25348 + * objc-act.c (encode_array): Handle arrays to zero sized types. + +2005-12-07 Rafael Ávila de Espíndola <rafael.espindola@gmail.com> + + * Make-lang.in (objc.all.build, objc.install-normal): Remove. + +2005-12-07 Rafael Ávila de Espíndola <rafael.espindola@gmail.com> + + * Make-lang.in: Remove all dependencies on s-gtype. + +2005-12-02 Richard Guenther <rguenther@suse.de> + + * objc-act.c (objc_build_exc_ptr, next_sjlj_build_enter_and_setjmp + next_sjlj_build_exc_extract, next_sjlj_build_catch_list, + next_sjlj_build_try_catch_finally, objc_begin_catch_clause, + build_objc_method_call, objc_rewrite_function_call): Use buildN + instead of build. + +2005-10-20 Geoffrey Keating <geoffk@apple.com> + + * objc-act.c (synth_module_prologue): Clear TREE_NOTHROW + on objc_msgSend and like builtin functions. + +2005-10-17 Andreas Krebbel <krebbel1@de.ibm.com> + + * objc-act.c (objc_build_component_ref): Adjust call to + finish_class_member_access_expr due to a changed prototype. + +2005-08-31 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/23306 + * objc-act.c (generate_strings): Remove and move code to + finish decl to ... + (add_objc_string): here when creating a new string decl. + (finish_objc): Don't call generate_strings. + +2005-08-31 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/23381 + * objc-act.c (next_sjlj_build_try_catch_finally): Set + TREE_SIDE_EFFECTS on catch_seq after building it. + +2005-08-09 Andrew Pinski <pinskia@physics.uc.edu> + + part of PR objc/21992 + * objc-act.c (handle_class_ref): The ref decl is always referenced. + +2005-07-20 Giovanni Bajo <giovannibajo@libero.it> + + Make CONSTRUCTOR use VEC to store initializers. + * objc-act.c (objc_build_constructor): Use build_constructor_from_list + instead of build_constructor. + +2005-07-08 Daniel Berlin <dberlin@dberlin.org> + + * objc-act.c (objc_push_parm): DECL_ARG_TYPE_AS_WRITTEN is + removed. + * objc-act.h (KEYWORD_ARG_NAME): Use decl_non_common. + (KEYWORD_KEY_NAME): Use decl_minimal. + (METHOD_SEL_NAME): Ditto.. + (METHOD_SEL_ARGS): Use decl_non_common. + (METHOD_ADD_ARGS): Ditto. + (METHOD_ADD_ARGS_ELLIPSIS_P): Use decl_common. + (METHOD_DEFINITION): Ditto. + (METHOD_ENCODING): Ditto. + * objc-lang.c: (objc_init_ts): New function. + +2005-07-07 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_build_struct): Pass in an actual @interface + instead of its name, and annotate the struct created (and all + existing variants thereof) with the @interface. + (objc_compare_types): Treat forward-declared ObjC classes + as stand-alone (root) classes for purposes of type comparisons. + (build_private_template): Move some code to objc_build_struct(). + +2005-07-07 Ziemowit Laski <zlaski@apple.com> + + PR objc/22274 + * objc-act.c (objc_build_string_object): For GNU-style constants, + use the @interface type rather than the built-in type. + +2005-07-03 Kazu Hirata <kazu@codesourcery.com> + + * Make-lang.in (cc1plus-checksum.c): Use + build/genchecksum$(build_exeext), not build/genchecksum$(exeext). + +2005-07-02 Joseph S. Myers <joseph@codesourcery.com> + + * objc-act.c: Use %q to quote in diagnostics. + +2005-07-02 Joseph S. Myers <joseph@codesourcery.com> + + * objc-act.c: Use '+' flag instead of %J. Use 'q' flag for + quoting. + +2005-06-30 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_build_volatilized_type): New function. + (objc_volatilize_decl): Call objc_build_volatilized_type() + instead of build_qualified_type(). + +2005-06-29 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_build_internal_const_str_type): New function. + (check_string_class_template): Use objc_get_class_ivars() instead + of TYPE_FIELDS() to retrieve ivar list. + (AT_LEAST_AS_LARGE_AS): Check the size of each field's type rather + than the field itself. + (objc_build_string_object): Synthesize a "__builtin_ObjCString" + type and use it to lay out compile-time string objects. + * objc-act.h (OCTI_INTERNAL_CNST_STR_TYPE, internal_const_str_type): + New. + +2005-06-28 Paul Brook <paul@codesourcery.com> + + * objc-act.c (objc_init_exceptions): Call + default_init_unwind_resume_libfunc. + +2005-06-27 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_build_struct): Save the TYPE_OBJC_INFO + portion of TYPE_LANG_SPECIFIC info for all variants of + a class before calling finish_struct(), and restore + same TYPE_OBJC_INFO afterwards. + +2005-06-25 Kelley Cook <kcook@gcc.gnu.org> + + * all files: Update FSF address in copyright headers. + +2005-06-15 Joseph S. Myers <joseph@codesourcery.com> + + * objc-act.c (my_build_string_pointer): New. + (objc_get_class_reference, get_super_receiver): Call + my_build_string_pointer instead of my_build_string when building + function arguments. + +2005-05-25 Mike Stump <mrs@mrs.kithrup.com> + + * objc-act.c (volatilized_hash): Avoid warnings on 64-bit + machines. + +2005-05-24 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_build_struct): New function. + (objc_derived_from_p): Likewise. + (objc_build_component_ref): Likewise. + (objc_copy_binfo): Likewise. + (objc_xref_basetypes): Likewise. + (objc_lookup_protocol): Likewise. + (objc_compare_protocols): Likewise. + (objc_volatilize_decl): Likewise. + (encode_aggregate_fields): Likewise. + (volatilized_hash): Likewise. + (volatilized_eq): Likewise. + (objc_compare_types): Likewise. + (objc_type_quals_match): Likewise. + (DERIVED_FROM_P): New ObjC macro, corresponding to C++ macro + of same name. + (get_class_ivars): Add second parameter indicating if entire + hierarchy is desired. + (struct volatilized_type): New type. + (volatilized_htab): New hash table. + (objc_types_compatible_p, objc_comptypes): Remove functions. + (synth_module_prologue): Do not initialize 'unused_list'. + (objc_get_class_reference): Fix ObjC++ impedance mismatches. + (objc_declare_alias): Implement as a typedef. + (objc_substitute_decl, objc_gimplify_expr): Reformat. + (objc_get_class_ivars): Adjust call to get_class_ivars(). + (next_sjlj_build_enter_and_setjmp, synth_forward_declarations, + build_ivar_reference, get_super_receiver): Call + objc_build_component_ref() instead of build_component_ref(). + (objc_begin_catch_clause): Use DERIVED_FROM_P() instead of + objc_comptypes(). + (build_private_template): Call objc_build_struct() instead of + start_struct() and finish_struct(). + (hash_init): Initialize volatilized_htab. + (objc_is_public): Adjust calls to objc_get_ivars(); adjust + ObjC++ impedance mismatches. + (encode_aggregate_within): Streamline by calling + encode_aggregate_fields(). + * objc-act.h (objc_types_compatible_p): Remove prototype. + (OCTI_UNUSED_LIST, unused_list): Remove slot. + * objc-lang.c (LANG_HOOKS_TYPES_COMPATIBLE_P): Remove. + +2005-05-18 Geoffrey Keating <geoffk@apple.com> + + * Make-lang.in (cc1obj-dummy): New. + (cc1obj-checksum.c): New. + (cc1obj-checksum.o): New. + (cc1obj): Add cc1obj-checksum.o. + +2005-05-18 Mike Stump <mrs@apple.com> + + PR objc/21641 + * objc-act.c (struct interface_tuple): Mark it up for GC. + (interface_htab): It is really a struct interface_tuple. + +2005-05-17 Ziemowit Laski <zlaski@apple.com> + Mike Stump <mrs@apple.com> + + Yet more Objective-C++... + + * objc-act.c (objc_finish_try_stmt): Add return value. + (objc_build_synchronized): Likewise. + + * objc-act.c (objc_is_gcable_type): Add. + (objc_substitute_decl): Add. + (objc_build_ivar_assignment): Add. + (objc_build_global_assignment): Add. + (objc_build_strong_cast_assignment): Add. + (objc_is_ivar_reference_p): Add. + (objc_is_global_reference_p): Add. + (objc_generate_write_barrier): Add. + (objc_rewrite_function_call): Add. + (objc_gimplify_expr): Add Objective-C++ support. + * objc-act.h (ALLOC_OBJC_TYPE_LANG_SPECIFIC): Likewise. + (SIZEOF_OBJC_TYPE_LANG_SPECIFIC): Add. + (INIT_TYPE_OBJC_INFO): Add Objective-C++ support. + (DUP_TYPE_OBJC_INFO): Likewise. + (struct imp_entry): Add field has_cxx_cdtors. + (struct imp_entry *imp_list): Add OCTI_UMSG_FAST_DECL, + OCTI_METH_LIST_TEMPL, OCTI_METH_PROTO_LIST_TEMPL, + OCTI_IVAR_LIST_TEMPL, OCTI_ASSIGN_IVAR_DECL, + OCTI_ASSIGN_IVAR_FAST_DECL, OCTI_ASSIGN_GLOBAL_DECL, + OCTI_ASSIGN_STRONGCAST_DECL. + (umsg_fast_decl): Add. + (objc_assign_ivar_decl): Add. + (objc_assign_ivar_fast_decl): Add. + (objc_assign_global_decl): Add. + (objc_assign_strong_cast_decl): Add. + (objc_method_list_ptr): Add. + (objc_method_proto_list_ptr): Add. + (objc_ivar_list_ptr): Add. + + * objc-act.c (should_call_super_dealloc): Add. + (OBJC_VERSION): Bump to 6. + (objc_is_gcable_type): Add. + (objc_substitute_decl): Add. + (objc_build_ivar_assignment): Add. + (objc_build_global_assignment): Add. + (objc_build_strong_cast_assignment): Add. + (objc_is_gcable_p): Add. + (objc_is_ivar_reference_p): Add. + (objc_is_global_reference_p): Add. + (generate_shared_structures): Add flags parameter. + (objc_generate_cxx_ctor_or_dtor): Add. + (objc_generate_cxx_cdtors): Add. + (add_class): Add name parameter. + (objc_types_share_size_and_alignment): Add. + (comp_proto_with_proto): Add strict parameter. + (CLS_HAS_CXX_STRUCTORS): Add. + (TAG_ASSIGNIVAR): Add. + (TAG_ASSIGNGLOBAL): Add. + (TAG_ASSIGNSTRONGCAST): Add. + (TAG_MSGSEND_FAST): Add. + (TAG_ASSIGNIVAR_FAST): Add. + (TAG_CXX_CONSTRUCT): Add. + (TAG_CXX_DESTRUCT): Add. + (OBJC_LOOKUP_CLASS): Add. + (OBJC_LOOKUP_NO_SUPER): Add. + (objc_finish_file): Add pch support. + (objc_finish_implementation): Add Objective-C++ support. + (synth_module_prologue): Likewise. + (synth_module_prologue): Add fast dispatching. + (objc_get_class_reference): Add Objective-C++ support. + (objc_generate_write_barrier): Likewise. + (next_sjlj_build_enter_and_setjmp): Likewise. + (objc_begin_try_stmt): Likewise. + (build_next_objc_exception_stuff): Add fast ivar support. + (build_private_template): Mark the record as used so debug + information is generated. + (build_protocol_template): Add Objective-C++ support. + (objc_method_parm_type) Likewise. + (objc_generate_cxx_ctor_or_dtor): Likewise. + (objc_generate_cxx_cdtors): Likewise. + (build_protocol_initializer): Likewise. + (build_category_template): Likewise. + (build_class_template): Likewise. + (build_method_list_template): Likewise. + (build_category_initializer): Likewise. + (build_shared_structure_initializer): Likewise. + (objc_finish_message_expr): Likewise. + (build_objc_method_call): Add fast dispatch support. + (lookup_method_static): Add support to end search at superclasses. + (add_method_to_hash_list): Add strict parameter to + comp_proto_with_proto. + (objc_add_method): Likewise. + (objc_add_method): Also set the interface_value. + (add_instance_variable): Add Objective-C++ support. + (objc_is_public): Likewise. + (start_class): Likewise. + (continue_class): Likewise. + (encode_aggregate_within): Likewise. + (start_method_def): Likewise. + (objc_start_function): Clear current_function_returns_value + and current_function_returns_null. + (really_start_method): Add Objective-C++ support. + (objc_finish_method_definition): Add warning for missing + [super dealloc]. + (finish_objc): Add Objective-C++ support. + (generate_objc_image_info): Likewise. + (objc_lookup_ivar): Likewise. + * objc-act.h (TYPE_HAS_OBJC_INFO): Likewise. + (INIT_TYPE_OBJC_INFO): Likewise. + (DUP_TYPE_OBJC_INFO): Likewise. + +2005-04-23 DJ Delorie <dj@redhat.com> + + * objc-act.c: Adjust warning() callers. + +2005-04-21 Roger Sayle <roger@eyesopen.com> + + * objc-act.h (METHOD_ADD_ARGS_ELLIPSIS_P): New macro for accessing + this field of an objc method decl. + * objc-act.c (build_method_decl): Take an additional "ellipsis" + argument, and set METHOD_ADD_ARGS_ELLIPSIS_P as appropriate. + (objc_build_method_signature): Accept additional "ellipsis" + argument and pass it to build_method_decl. + (get_arg_type_list, start_method_def, gen_method_decl): Use + the new METHOD_ADD_ARGS_ELLIPSIS_P instead of examining the + TREE_OVERFLOW field of a TREE_LIST node. + +2005-04-20 Joseph S. Myers <joseph@codesourcery.com> + + PR c/12913 + * objc-act.c (objc_start_function): Create stack level for context + of identifiers with variably modified type. + +2005-03-30 Joseph S. Myers <joseph@codesourcery.com> + + PR c/772 + PR c/17913 + * objc-act.c (objc_start_function): Push context on + label_context_stack. + +2005-03-23 Joseph S. Myers <joseph@codesourcery.com> + + * objc-act.c (next_sjlj_build_enter_and_setjmp, + next_sjlj_build_catch_list, next_sjlj_build_try_catch_finally): + Call c_common_truthvalue_conversion. + +2005-02-25 Joseph S. Myers <joseph@codesourcery.com> + + * Make-lang.in (objc/objc-parse.o-warn, objc/objc-parse.o, + objc/objc-parse.c, objc/objc-parse.y): Remove + (OBJC_OBJS, objc.srcextra, objc.tags, objc.mostlyclean, + objc.distclean, objc.maintainer-clean): Update for new parser. + * config-lang.in (gtfiles): Update for new parser. + +2005-01-29 Kazu Hirata <kazu@cs.umass.edu> + + * lang-specs.h, objc-act.c, objc-act.h, objc-lang.c: Update + copyright. + +2005-01-27 Matt Austern <austern@apple.com> + + * objc-act.c (objc_finish_file): In ObjC++ mode, set at_eof before + calling instantiate_pending_templates. + +2005-01-26 Alexander Malmberg <alexander@malmberg.org> + + PR objc/18862 + * objc-act.c (build_selector_translation_table): Use + input_location in the diagnostic for the GNU runtime or if + TREE_PURPOSE (chain) is NULL. + +2005-01-25 Alexander Malmberg <alexander@malmberg.org> + + PR objc/18408 + * objc-act.c (objc_types_compatible_p): New function. + * objc-act.h (objc_types_compatible_p): Declare. + * objc-lang.c (LANG_HOOKS_TYPES_COMPATIBLE_P): Define. + +2005-01-16 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_push_parm): Call c_type_promotes_to() + via a lang-hook. + +2005-01-15 Ziemowit Laski <zlaski@apple.com> + + PR objc/19321 + * objc-act.c (get_arg_type_list): Decay function arguments into + pointers. + (objc_push_parm): Likewise; bring PARM_DECL construction closer + in line with what the C front-end does. + (objc_get_parm_info): Call pushdecl() and finish_decl() on + each PARM_DECL, like the C front-end does. + (start_method_def): Remove redundant ARRAY_TYPE decay. + (objc_start_function): Bring closer in line with what the + C front-end does for functions. + +2005-01-14 Mike Stump <mrs@apple.com> + + * lang-specs.h ("@objective-c"): Use cc1obj when -E is used so + that -fobjc-exceptions is accepted. + +2004-12-30 Ziemowit Laski <zlaski@apple.com> + + PR objc/18971 + * objc-act.c (get_arg_type_list, start_method_def): Decay + array arguments into pointers. + (gen_type_name_0): Learn to pretty-print array types. + +2004-12-15 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (build_private_template): Change to return 'void'; do + not set ivar_context, uprivate_record or objc_instance_type. + (objc_comptypes, gen_type_name_0): For types 'id' and 'Class', + retrieve protocol list from the pointee rather than the pointer itself; + check TYPE_HAS_OBJC_INFO(...) precondition before accessing + TYPE_OBJC_PROTOCOL_LIST. + (objc_get_protocol_qualified_type): For types 'id' and 'Class', + construct a variant of the pointee as well as the pointer, and + store protocol information in the former. When creating variants + of RECORD_TYPEs, clone their TYPE_LANG_SPECIFIC fields and propagate + TYPE_OBJC_INTERFACE information. + (objc_declare_class): If a TYPE_DECL is looked up, retrieve the + underlying RECORD_TYPE to check for presence of TYPE_OBJC_INTERFACE; + for newly-created RECORD_TYPEs, create a tentative TYPE_OBJC_INTERFACE + holding an IDENTIFIER_NODE. + (objc_finish_message_expr): Check TYPE_HAS_OBJC_INFO(...) before + accessing TYPE_OBJC_PROTOCOL_LIST; Use TYPE_OBJC_INTERFACE instead + of calling lookup_interface(); allow for TYPE_OBJC_INTERFACE holding + an IDENTIFIER_NODE (meaning a @class forward-declaration only). + (objc_is_public): Check TYPE_OBJC_INTERFACE instead of calling + lookup_interface(). + (continue_class): For @implementations, set ivar_context, + uprivate_record and objc_instance_type, for @interfaces, call + build_private_template(). + (encode_pointer): Check TYPE_HAS_OBJC_INFO(...) before accessing + TYPE_OBJC_INTERFACE. + (objc_types_are_equivalent): Check TYPE_HAS_OBJC_INFO(...) before + accessing TYPE_OBJC_PROTOCOL_LIST. + * objc-act.h (OBJC_INFO_SLOT_ELTS, TYPE_OBJC_INFO, INIT_TYPE_OBJC_INFO, + DUP_TYPE_OBJC_INFO, ALLOC_OBJC_TYPE_LANG_SPECIFIC, + SIZEOF_OBJC_TYPE_LANG_SPECIFIC): New macros. + (TYPE_OBJC_INTERFACE): Replaces TREE_STATIC_INSTANCE and now points + to an actual @interface; stored in TYPE_LANG_SPECIFIC(...). + (TYPE_OBJC_PROTOCOL_LIST): Replaces TYPE_PROTOCOL_LIST; stored in + TYPE_LANG_SPECIFIC(...). + (TREE_STATIC_INSTANCE, TYPE_PROTOCOL_LIST): Delete. + (IS_ID, IS_CLASS, IS_PROTOCOL_QUALIFIED_UNTYPED, IS_SUPER, + TYPED_OBJECT): Check for POINTER_TYPE rather than POINTER_TYPE_P; + adjust for use of TYPE_OBJC_INTERFACE and TYPE_OBJC_PROTOCOL_LIST + instead of TREE_STATIC_INSTANCE and TYPE_PROTOCOL_LIST. + +2004-11-29 Joseph Myers <joseph@codesourcery.com> + + PR c/7544 + * Make-lang.in (objc/objc-act.o): Update dependencies. + * objc-act.c (objc_finish_file): Call + maybe_apply_pending_pragma_weaks if not OBJCPLUS. + +2004-11-09 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/18406 + * obj-act.c (encode_type): 96bits doubles are encoded the + same way as 64bit and 128bit doubles are. + +2004-11-09 Joseph S. Myers <joseph@codesourcery.com> + + * objc-act.c: Use %q, %< and %> for quoting in diagnostics. + +2004-11-08 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/16546 + * objc-act.c (generate_method_descriptors): Remove setting + the new decls' type to variable_length_type. + (generate_ivar_lists): Likewise. + (generate_dispatch_tables): Likewise. + +2004-10-30 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_lookup_ivar): The new OTHER parameter + contains the result of the ID lookup by the C or C++ + front-end; in class methods, use OTHER if it exists; + in instance methods, use OTHER only if it is locally + declared. + +2004-10-26 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (finish_class): Do not synthesize bogus + 'extern objc_object *_Foo;' declarations for @interface Foo. + +2004-10-25 Ziemowit Laski <zlaski@apple.com> + David Ayers <d.ayers@inode.at> + + * objc-act.c (objc_comptypes): Use IS_PROTOCOL_QUALIFIED_UNTYPED + instead of IS_PROTOCOL_QUALIFIED_ID; add comparisons for: + 'Class <Protocol> != id <Protocol>'; 'Class <Protocol> != <class> *'; + 'Class <Protocol> == id' and 'Class <Protocol> == Class'. + (objc_is_id): Add test for 'super'. + (objc_finish_message_expr): Allow for messaging of 'Class <Proto>' + receivers; if class methods are not found in protocol lists, search + for instance methods therein and warn if one is found. Look in + global hash tables for suitable method as a last resort when messaging + 'id <Proto>', 'Class <Proto>' and invalid receiver types. + (objc_add_method): Insert instance methods listed in protocols into + the global class method hash table. + * objc-act.h (IS_PROTOCOL_QUALIFIED_ID): Rename to + IS_PROTOCOL_QUALIFIED_UNTYPED and allow for 'Class <Proto>' in + addition to 'id <Proto>'. + +2004-10-21 Andrew Pinski <pinskia@physics.uc.edu> + + PR objc/17923 + * objc-act.c (objc_build_string_object): Create a CONST_DECL + for the NeXT runtime case. + +2004-10-02 Kazu Hirata <kazu@cs.umass.edu> + + * objc-act.c: Fix comment typos. + +2004-09-24 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (init_objc_symtab, init_module_descriptor, + build_shared_structure_initializer): When initializing 'long' + fields, ensure that the initializer value is also 'long'. + +2004-09-24 Zack Weinberg <zack@codesourcery.com> + + * objc-act.c: Change annotate_with_locus to SET_EXPR_LOCATION + throughout. + (objc_init): Only set input_line to 0 #ifndef USE_MAPPED_LOCATION. + (build_selector_translation_table): Use %J in diagnostic + instead of diddling input_line. Fix spelling. + +2004-09-21 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_fold_objc_type_ref): New function. + * objc-act.h (objc_fold_objc_type_ref): New prototype. + +2004-09-09 Joseph S. Myers <jsm@polyomino.org.uk> + + * objc-act.c (objc_start_function, really_start_method, + objc_get_parm_info, start_method_def): Update to new arg_info + structures. + +2004-09-07 Ziemowit Laski <zlaski@apple.com> + + * Make-lang.in (objc/objc-parse.o): Depend on $(C_COMMON_H) instead of + objc/objc-act.h. + (objc/objc-act.o): Depend on $(HASHTAB_H). + * objc-act.c: Include hashtab.h; in ObjC++ mode, include cp-tree.h and + objcp-decl.h instead of c-tree.h. + (build_module_descriptor, get_class_ivars, synth_id_with_class_suffix, + error_with_ivar, gen_method_decl, gen_declaration, setup_string_decl, + build_protocol_template): Adjust prototypes. + (build_module_initializer_routine, start_class, continue_class, + finish_class, start_method_def, objc_start_function, start_protocol, + build_method_decl, objc_add_method, add_instance_variable, + build_ivar_reference, is_ivar, is_private, get_super_receiver, + build_selector_table_decl, objc_push_parm, objc_get_parm_info, + gen_type_name, gen_type_name_0, start_var_decl, finish_var_decl, + create_field_decl): New prototypes. + (objc_expand_function_end, comp_method_with_proto, objc_expr_last, + gen_declaration_1, gen_declarator, is_complex_decl, adorn_decl, + define_decl, create_builtin_decl, gen_declspecs): Remove prototypes. + (TYPE_ID): Rename to OBJECT_TYPEDEF_NAME. + (CLASS_TYPEDEF_NAME): New. + (TAG_EXECCLASS): Change from a global variable to a #define. + (TAG_RETURN_STRUCT): Delete. + (TAG_GNUINIT): New, holds '__objc_gnu_init' name. + (objc_inherit_code, objc_public_flag): New, moved from c-parse.in. + (string_descriptor): New struct. + (string_htab): New hash table. + (string_hash, string_eq): New prototypes. + (generate_struct_by_value_array): Call create_field_decl() instead of + create_builtin_decl(). + (objc_init): Do not initialize objc_ellipsis_node or TAG_EXECCLASS; + In ObjC++ mode, call cxx_init() instead of c_objc_common_init(). + (objc_finish_file): In ObjC++, call instantiate_pending_templates() + and cp_finish_file(). + (define_decl, get_static_reference, get_protocol_reference, + create_builtin_decl): Remove functions. + (objc_start_class_interface, objc_start_category_interface, + objc_start_protocol, objc_continue_interface, objc_finish_interface, + objc_start_class_implementation, objc_start_category_implementation, + objc_continue_implementation, objc_finish_implementation, + objc_set_visibility, objc_set_method_type, + objc_build_method_signature, objc_add_method_declaration, + objc_start_method_definition, objc_add_instance_variable, + objc_get_protocol_qualified_type, create_field_decl, + start_var_decl, finish_var_decl): New functions. + (setup_string_decl): Simplify since it is only called once. + (synth_module_prologue): Call build_class_template(); predefine 'id' + and 'Class' as typedefs; rename 'temp_type' to 'type'; disable debug + hooks for duration of function; fix GNU runtime messenger signatures + to correspond to reality; forward-declare '__objc_exec_class' for the + GNU runtime; call build_selector_table_decl(); in ObjC++ mode, generate + 'extern "C" { ... }' wrappers around synthesized declarations; call + build_protocol_template() and build_category_template(). + (string_hash, string_eq): New functions. + (objc_build_string_object): Check metaclass correctness only once; + store string literals in hash table. + (objc_build_constructor): Do not convert initializer elements; + adjust for ObjC++ impedance mismatch. + (build_objc_symtab_template): Call create_field_decl() instead of + create_builtin_decl(). + (init_objc_symtab): Add missing conversion to initializer element. + (build_metadata_decl): Call start_var_decl() instead of define_decl(). + (generate_objc_symtab_decl): Do not call build_category_template(); + call start_var_decl() and finish_var_decl() instead of start_decl() + and finish_decl(). + (build_module_descriptor): Call create_field_decl() instead of + grokfield(); call start_var_decl() and finish_var_decl() instead of + start_decl() and finish_decl(); always mark module descriptor as + used; move GNU runtime-specific functionality to + build_module_initializer_routine(). + (build_module_initializer_routine): New function, broken off of + build_module_descriptor(). + (objc_static_init_needed_p, objc_generate_static_init_call): New + functions. + (generate_static_references, generate_strings, + build_selector_translation_table, generate_descriptor_table, + generate_ivars_list, generate_dispatch_table, generate_category): Call + start_var_decl() and finish_var_decl() instead of start_decl() and + finish_decl(); build a type directly instead of via groktypename(). + (build_selector_reference_decl, build_selector_table_decl, + build_class_reference_decl, build_protocol_reference, + generate_objc_image_info): Call start_var_decl() instead of + build_decl(). + (build_selector_reference): For GNU runtime, do not call + build_selector_reference_decl(). + (build_selector, build_typed_selector_reference): Always convert + result to the selector type. + (add_objc_string): Cast return value to 'char *'. + (build_method_prototype_template, build_selector_template, + build_method_template): Use actual selector type for fields + pointing to selectors. + (finish_objc): For GNU runtime, call + build_module_initializer_routine() after build_module_descriptor(). + (generate_protocol_list, generate_shared_structures): Call + start_var_decl() and finish_var_decl() instead of start_decl() and + finish_decl(); build a type directly instead of via + groktypename(). + (synth_id_with_class_suffix): Return a string. + (get_arg_type_list): For instance methods, use the instance type for + 'self'; do not call groktypename_in_parm_context(). + (build_objc_string_decl): Squash redeclaration errors in ObjC++. + (objc_is_class_name): Use OBJC_TYPE_NAME instead of TYPE_NAME; + handle RECORD_TYPEs in ObjC as well as ObjC++. + (objc_is_id): New function. + (objc_is_object_ptr): Return the canonical type node. + (objc_get_class_ivars): Simplify using get_class_ivars(). + (get_class_ivars): Remove second parameter; create a fresh copy + of the ivar list for each call; do not check for existence of + super class. + (objc_eh_runtime_type): Mark #ifndef OBJCPLUS. + (objc_init_exceptions): When using SJLJ-style exceptions, require + the use of '-fobjc-exceptions' flag; do not require it for DWARF-style + exceptions. + (objc_build_exc_ptr, next_sjlj_build_try_catch_finally): Use + objc_object_type instead of objc_id_type. + (objc_begin_catch_clause): Convert the incoming PARM_DECL into + a VAR_DECL before placing it in the appropriate scope; do not + call define_decl(); adjust call to c_begin_compound_stmt(); + use objc_object_type instead of objc_id_type. + (build_next_objc_exception_stuff): Call create_field_decl() instead + of create_builtin_decl(); construct type directly instead of calling + groktypename(); use OBJC_VOID_AT_END to mark end of function parameters. + (build_private_template): Adjust call to get_class_ivars(); build + a type directly instead of via groktypename(). + (build_protocol_template, build_method_prototype_list_template, + build_method_prototype_template, build_category_template, + build_selector_template, build_class_template, build_super_template, + build_ivar_template, build_ivar_list_template, + build_method_list_template, build_method_template): + Call create_field_decl() instead of grokfield(). + (objc_method_parm_type): Do not call groktypename(). + (generate_descriptor_table): Call start_var_decl() and + finish_var_decl() instead of start_decl() and finish_decl(). + (generate_method_descriptors, build_protocol_initializer, + generate_dispatch_tables, build_category_initializer, + build_shared_structure_initializer): Do not call groktypename(). + (generate_protocols): Call start_var_decl() and finish_var_decl() + instead of start_decl() and finish_decl(); do not call groktypename(). + (error_with_ivar): Remove last parameter. + (check_ivars): Do not iterate ovar CLASS_RAW_IVARS lists in addition + to CLASS_IVARS lists; adjust calls to error_with_ivar(). + (generate_ivar_lists): Convert one of the initializer elements; do + not call groktypename(). + (get_arg_type_list, start_method_def, gen_method_def): Account for + new representation of variable arguments and '...' in Objective-C + methods; add Objective-C++ impedance matching code. + (is_objc_type_qualifier): Remove function. + (adjust_type_for_id_default): Simplify; there is no longer a need to + wade through declspecs. + (lookup_interface, start_class, continue_class, + finish_class, start_method_def, start_protocol, build_method_decl, + objc_add_method, add_instance_variable, build_ivar_reference, + is_ivar, is_private, get_super_receiver, objc_build_finally_epilogue): + Make into static functions. + (receiver_is_class_object): Use new IS_CLASS() macro. + (objc_build_message_expr): Tweak ObjC++ message argument handling; + call objc_finish_message_expr() instead of finish_message_expr(). + (finish_message_expr): Rename to objc_finish_message_expr(); use + OBJC_TYPE_NAME and OBJC_SET_TYPE_NAME macros instead of TYPE_NAME. + call gen_type_name() instead of gen_declaration(); call objc_is_id() + instead of using IS_ID and IS_CLASS; Use objc_class_name instead of + calling get_identifier("Class"); handle CONVERT_EXPRs in receiver. + (build_objc_method_call, warn_with_method): Do not call groktypename(). + (build_ivar_reference): Call convert() instead of clobbering in a + type. + (hash_init): Initialize string_htab hash table. + (add_instance_variable): Simplify parameter list; do not call grokfield(); + do not populate CLASS_IVARS list. + (start_class): Check for the existence of super class, if one was specified. + (continue_class): Use CLASS_RAW_IVARS rather than CLASS_IVARS; do not + call build_class_template(); adjust call to get_class_ivars(); call + build_decl(), pushdecl() and finish_decl() instead of define_decl(). + (finish_class): Call build_decl(), pushdecl() and finish_decl() instead + of define_decl(). + (add_protocols): Use PROTOCOL_BINFO_ELTS for the tree vector size. + (start_protocol): Do not call build_protocol_template(); use + PROTOCOL_BINFO_ELTS for the tree vector size. + (encode_type_qualifiers): Do not handle the 'const' qualifier here. + (encode_pointer): Encode 'const char *' as 'r*', for backwards + compatibility. + (encode_array): Use HOST_WIDE_INT_PRINT_DEC instead of "%ld". + (encode_type): Handle the 'const' qualifier here. + (objc_parmlist): New global variable, sued by objc_push_parm and + objc_get_parm_info(). + (objc_push_parm, objc_get_parm_info): New functions. + (objc_expr_last): Remove function. + (synth_self_and_ucmd_args): For instance methods, use the instance + type for 'self'; call objc_push_parm() instead of push_parm_decl(). + (start_method_def): Do not call push_scope(), declare_parm_level(), + pop_scope(), push_parm_decl(), store_parm_decls() or objc_expr_last(); + just use objc_push_parm() and objc_get_parm_info(). + (comp_method_with_proto): Remove function. + (objc_types_are_equivalent): Strip away indirections before comparing + underlying types. + (comp_proto_with_proto): Do not call groktypename(); types are no + longer in raw declspec format. + (objc_start_function): New function. + (really_start_method): Call comp_proto_with_proto() instead of + comp_method_with_proto(); call objc_start_function() instead of + hand-crafting a function declarator. + (continue_method_def, objc_expand_function_end): Remove functions. + (get_super_receiver): Call objc_get_current_scope() instead of + get_current_scope(); reference 'super_class' field (instead of + 'class'). + (finish_method_def): Rename to objc_finish_method_definition() and + add a function decl parameter; move method encoding call from + objc_expand_function_end(). + (is_complex_decl, adorn_decl, gen_declarator, gen_declspecs, + gen_declaration_1): Remove functions. + (tmpbuf, RAW_DECLSPEC): Remove. + (gen_declaration): Remove second parameter; simplify to deal + with TYPE_P nodes instead of raw declspecs. + (gen_type_name, gen_type_name_0): New functions. + (gen_method_decl): Remove second parameter; call gen_type_name() + instead of gen_declaration_1(). + (dump_interface): Adjust calls to gen_declaration() and + gen_method_decl(); do not allocate a separate string buffer. + (init_objc): Allocate a larger string buffer to accommodate + dump_interface(); adjust call to build_module_descriptor(); + add call to build_module_initializer_routine() for the GNU + runtime. + (generate_classref_translation_entry): Do not call start_decl(); call + finish_var_decl() instead of finish_decl(); call convert() instead of + build_c_cast(). + * objc-act.h (CLASS_OWN_IVARS): Remove accessor. + (CLASS_BINFO_ELTS): Reduce from 6 to 5, now that CLASS_OWN_IVARS is + gone. + (OCTI_GNU_INIT_DECL, GNU_INIT_decl): New. + (OCTI_ELLIPSIS_NODE, objc_ellipsis_node): Remove. + (OCTI_ID_ID, id_type, objc_id_id): Rename to OCTI_ID_NAME, + objc_object_type and objc_object_name, respectively. + (OCTI_CLS_REF, OCTI_CLASS_NAME, objc_class_reference, + objc_class_name): New. + (IS_CLASS): New macro. + (IS_ID, IS_SUPER): Robustify. + (OCTI_EXECCLASS_DECL, execclass_decl): New. + (finish_file, start_class, continue_class, finish_class, + start_method_def, continue_method_def, finish_method_def, + start_protocol, finish_protocol, objc_build_throw_stmt, + objc_build_try_catch_finally_stmt, objc_build_synchronized_prologue, + objc_build_synchronized_epilogue, objc_build_try_prologue, + objc_build_try_epilogue, objc_build_catch_stmt, objc_build_catch_epilogue, + objc_build_finally_prologue, objc_build_finally_epilogue, + is_ivar, is_private, is_public, add_instance_variable, objc_add_method, + get_super_receiver, objc_clear_super_receiver, get_class_ivars_from_name, + get_class_reference, get_static_reference, get_object_reference, + build_message_expr, finish_message_expr, build_selector_expr, + build_ivar_reference, build_keyword_decl, build_method_decl, + build_protocol_expr, build_objc_string_object, objc_declare_alias, + objc_declare_class, objc_declare_protocols, objc_comptypes, + objc_check_decl, build_encode_expr): Remove prototypes. + (imp_count, cat_count): Make GGC-aware. + (OBJC_SET_TYPE_NAME): New macro. + +2004-09-03 Ziemowit Laski <zlaski@apple.com> + + * config-lang.in: Update copyright notice. + (lang_requires): Indicate that ObjC requires C to be built first. + +2004-09-01 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_check_decl): Use OBJC_TYPE_NAME macro instead of + TYPE_NAME. + (build_objc_string_object): Rename to objc_build_string_object(). + (get_class_reference): Rename to objc_get_class_reference(). + (get_class_ivars_from_name): Rename to objc_get_class_ivars(). + (next_sjlj_build_catch_list, get_super_receiver): Call + objc_get_class_reference() instead of get_class_reference(). + (build_keyword_decl): Rename to objc_build_keyword_decl(). + (build_message_expr): Rename to objc_build_message_expr(). + (build_protocol_expr): Rename to objc_build_protocol_expr(). + (build_selector_expr): Rename to objc_build_selector_expr(). + (build_encode_expr): Rename to objc_build_encode_expr(). + * objc-act.h (get_class_ivars_from_name): Rename prototype to + objc_get_class_ivars(). + (get_class_reference): Rename prototype to objc_get_class_reference(). + (build_message_expr): Rename prototype to objc_build_message_expr(). + (build_selector_expr): Rename prototype to objc_build_selector_expr(). + (build_keyword_decl): Rename prototype to objc_build_keyword_decl(). + (build_protocol_expr): Rename prototype to objc_build_prototype_expr(). + (build_objc_string_object): Rename prototype to + objc_build_string_object(). + +2004-09-01 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (lookup_interface): Make function 'static' and add a + local prototype. + (objc_check_decl, get_class_reference, objc_declare_alias, + objc_declare_class, objc_is_object_ptr): Call objc_is_class_name() + instead of is_class_name(). + (get_super_receiver, objc_clear_super_receiver): Call + objc_get_current_scope() instead of get_current_scope(). + (is_class_name): Rename to objc_is_class_name. + (lookup_objc_ivar): Rename to objc_lookup_ivar. + +2004-08-28 Ziemowit Laski <zlaski@apple.com> + + * objc-act.c (objc_is_reserved_word): New function. + +2004-08-15 Ziemowit Laski <zlaski@apple.com> + + * Make-lang.in (objc/objc-lang.o): Depend on $(C_PRETTY_PRINT_H), + $(DIAGNOSTIC_H), c-objc-common.h and gtype-objc.h, but not on toplev.h. + (objc/objc-parse.o): Do not depend on gtype-objc.h. + * objc-act.c: Do not include gtype-objc.h. + (finish_file): Rename to objc_finish_file(). + * objc-act.h (finish_file): Update copyright notice; remove prototype. + * objc-lang.c: Update copyright notice; include diagnostic.h, + c-objc-common.h, c-pretty-print.h and gtype-objc.h; do not include + toplev.h. + (finish_file): New hook routine. + (LANG_HOOKS_FINISH, LANG_HOOKS_INIT_OPTIONS, + LANG_HOOKS_INITIALIZE_DIAGNOSTICS, LANG_HOOKS_HANDLE_OPTION, + LANG_HOOKS_MISSING_ARGUMENT, LANG_HOOKS_POST_OPTIONS, + LANG_HOOKS_GET_ALIAS_SET, LANG_HOOKS_SAFE_FROM_P, + LANG_HOOKS_EXPAND_EXPR, LANG_HOOKS_MARK_ADDRESSABLE, + LANG_HOOKS_PARSE_FILE, LANG_HOOKS_TRUTHVALUE_CONVERSION, + LANG_HOOKS_FINISH_INCOMPLETE_DECL, LANG_HOOKS_UNSAFE_FOR_REEVAL, + LANG_HOOKS_STATICP, LANG_HOOKS_SET_DECL_ASSEMBLER_NAME, + LANG_HOOKS_NO_BODY_BLOCKS, LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL, + LANG_HOOKS_PRINT_IDENTIFIER, LANG_HOOKS_FUNCTION_ENTER_NESTED, + LANG_HOOKS_FUNCTION_LEAVE_NESTED, LANG_HOOKS_DUP_LANG_SPECIFIC_DECL, + LANG_HOOKS_DECL_UNINIT, LANG_HOOKS_RTL_EXPAND_STMT, + LANG_HOOKS_COMMON_ATTRIBUTE_TABLE, LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE, + LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN, + LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS, + LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P, + LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING, + LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS, + LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN, + LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION, LANG_HOOKS_TYPE_FOR_MODE, + LANG_HOOKS_TYPE_FOR_SIZE, LANG_HOOKS_SIGNED_TYPE, + LANG_HOOKS_UNSIGNED_TYPE, LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE, + LANG_HOOKS_INCOMPLETE_TYPE_ERROR, LANG_HOOKS_TYPE_PROMOTES_TO, + LANG_HOOKS_REGISTER_BUILTIN_TYPE, LANG_HOOKS_WRITE_GLOBALS): + Move to c-objc-common.h. diff --git a/contrib/gcc/objc/Make-lang.in b/contrib/gcc/objc/Make-lang.in new file mode 100644 index 0000000..41463f2 --- /dev/null +++ b/contrib/gcc/objc/Make-lang.in @@ -0,0 +1,142 @@ +# Top level -*- makefile -*- fragment for GNU Objective-C +# Copyright (C) 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005 +# Free Software Foundation, Inc. + +#This file is part of GCC. + +#GCC is free software; you can redistribute it and/or modify +#it under the terms of the GNU General Public License as published by +#the Free Software Foundation; either version 2, or (at your option) +#any later version. + +#GCC is distributed in the hope that it will be useful, +#but WITHOUT ANY WARRANTY; without even the implied warranty of +#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +#GNU General Public License for more details. + +#You should have received a copy of the GNU General Public License +#along with GCC; see the file COPYING. If not, write to +#the Free Software Foundation, 51 Franklin Street, Fifth Floor, +#Boston, MA 02110-1301, USA. + +# This file provides the language dependent support in the main Makefile. +# Each language makefile fragment must provide the following targets: +# +# foo.all.cross, foo.start.encap, foo.rest.encap, +# foo.install-common, foo.install-man, foo.install-info, foo.dvi, foo.pdf +# foo.uninstall, +# foo.mostlyclean, foo.clean, foo.distclean, +# foo.maintainer-clean, foo.stage1, foo.stage2, foo.stage3, foo.stage4 +# +# where `foo' is the name of the language. +# +# It should also provide rules for: +# +# - making any compiler driver (eg: g++) +# - the compiler proper (eg: cc1plus) +# - define the names for selecting the language in LANGUAGES. + +# +# Define the names for selecting Objective-C in LANGUAGES. +objc: cc1obj$(exeext) + +# Tell GNU make to ignore these if they exist. +.PHONY: objc + +# Use maximal warnings for this front end. +objc-warn = $(STRICT_WARN) + +# Language-specific object files for Objective C. +OBJC_OBJS = objc/objc-lang.o objc/objc-act.o + +cc1obj-dummy$(exeext): $(OBJC_OBJS) $(C_AND_OBJC_OBJS) dummy-checksum.o $(BACKEND) $(LIBDEPS) + $(CC) $(ALL_CFLAGS) $(LDFLAGS) -o $@ \ + $(OBJC_OBJS) $(C_AND_OBJC_OBJS) dummy-checksum.o \ + $(BACKEND) $(LIBS) + +cc1obj-checksum.c : cc1obj-dummy$(exeext) build/genchecksum$(build_exeext) + build/genchecksum$(build_exeext) cc1obj-dummy$(exeext) > $@ + +cc1obj-checksum.o : cc1obj-checksum.c + +cc1obj$(exeext): $(OBJC_OBJS) $(C_AND_OBJC_OBJS) cc1obj-checksum.o $(BACKEND) $(LIBDEPS) + $(CC) $(ALL_CFLAGS) $(LDFLAGS) -o $@ \ + $(OBJC_OBJS) $(C_AND_OBJC_OBJS) cc1obj-checksum.o \ + $(BACKEND) $(LIBS) + +# Objective C language specific files. + +objc/objc-lang.o : objc/objc-lang.c \ + $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) \ + $(C_TREE_H) $(DIAGNOSTIC_H) \ + $(GGC_H) langhooks.h $(LANGHOOKS_DEF_H) $(C_COMMON_H) gtype-objc.h \ + c-objc-common.h objc/objc-act.h $(TREE_GIMPLE_H) + +objc/objc-act.o : objc/objc-act.c \ + $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) $(RTL_H) $(TM_P_H) \ + $(EXPR_H) $(TARGET_H) $(C_TREE_H) $(DIAGNOSTIC_H) toplev.h $(FLAGS_H) \ + objc/objc-act.h input.h $(FUNCTION_H) output.h debug.h langhooks.h \ + $(LANGHOOKS_DEF_H) $(HASHTAB_H) $(C_PRAGMA_H) gt-objc-objc-act.h \ + $(TREE_GIMPLE_H) + +objc.srcextra: + +# +# Build hooks: + +objc.all.cross: +objc.start.encap: +objc.rest.encap: +objc.info: +objc.install-info: +objc.dvi: +objc.pdf: +objc.html: +objc.man: +objc.srcinfo: +objc.srcman: + +objc.tags: force + cd $(srcdir)/objc; etags -o TAGS.sub *.c *.h; \ + etags --include TAGS.sub --include ../TAGS.sub + +lang_checks += check-objc + +# +# Install hooks: +# cc1obj is installed elsewhere as part of $(COMPILERS). + +objc.install-common: + +objc.install-man: + +objc.uninstall: +# +# Clean hooks: +# A lot of the ancillary files are deleted by the main makefile. +# We just have to delete files specific to us. +objc.mostlyclean: + -rm -f objc/*$(objext) objc/xforward objc/fflags + -rm -f objc/*$(coverageexts) +objc.clean: objc.mostlyclean + -rm -rf objc-headers +objc.distclean: + -rm -f objc/Makefile objc/Make-host objc/Make-target + -rm -f objc/config.status objc/config.cache +objc.maintainer-clean: + +# +# Stage hooks: + +objc.stage1: stage1-start + -mv objc/*$(objext) stage1/objc +objc.stage2: stage2-start + -mv objc/*$(objext) stage2/objc +objc.stage3: stage3-start + -mv objc/*$(objext) stage3/objc +objc.stage4: stage4-start + -mv objc/*$(objext) stage4/objc +objc.stageprofile: stageprofile-start + -mv objc/*$(objext) stageprofile/objc +objc.stagefeedback: stagefeedback-start + -mv objc/*$(objext) stagefeedback/objc diff --git a/contrib/gcc/objc/README b/contrib/gcc/objc/README new file mode 100644 index 0000000..f478d67 --- /dev/null +++ b/contrib/gcc/objc/README @@ -0,0 +1,97 @@ + +GNU Objective C notes +********************* + +This document is to explain what has been done, and a little about how +specific features differ from other implementations. The runtime has +been completely rewritten in gcc 2.4. The earlier runtime had several +severe bugs and was rather incomplete. The compiler has had several +new features added as well. + +This is not documentation for Objective C, it is usable to someone +who knows Objective C from somewhere else. + + +Runtime API functions +===================== + +The runtime is modeled after the NeXT Objective C runtime. That is, +most functions have semantics as it is known from the NeXT. The +names, however, have changed. All runtime API functions have names +of lowercase letters and underscores as opposed to the +`traditional' mixed case names. + The runtime api functions are not documented as of now. +Someone offered to write it, and did it, but we were not allowed to +use it by his university (Very sad story). We have started writing +the documentation over again. This will be announced in appropriate +places when it becomes available. + + +Protocols +========= + +Protocols are now fully supported. The semantics is exactly as on the +NeXT. There is a flag to specify how protocols should be typechecked +when adopted to classes. The normal typechecker requires that all +methods in a given protocol must be implemented in the class that +adopts it -- it is not enough to inherit them. The flag +`-Wno-protocol' causes it to allow inherited methods, while +`-Wprotocols' is the default which requires them defined. + + ++initialize +=========== + +This method, if defined, is called before any other instance or class +methods of that particular class. This method is not inherited, and +is thus not called as initializer for a subclass that doesn't define +it itself. Thus, each +initialize method is called exactly once (or +never if no methods of that particular class is never called). +Besides this, it is allowed to have several +initialize methods, one +for each category. The order in which these (multiple methods) are +called is not well defined. I am not completely certain what the +semantics of this method is for other implementations, but this is +how it works for GNU Objective C. + + +Passivation/Activation/Typedstreams +=================================== + +This is supported in the style of NeXT TypedStream's. Consult the +headerfile Typedstreams.h for api functions. I (Kresten) have +rewritten it in Objective C, but this implementation is not part of +2.4, it is available from the GNU Objective C prerelease archive. + There is one difference worth noting concerning objects stored with +objc_write_object_reference (aka NXWriteObjectReference). When these +are read back in, their object is not guaranteed to be available until +the `-awake' method is called in the object that requests that object. +To objc_read_object you must pass a pointer to an id, which is valid +after exit from the function calling it (like e.g. an instance +variable). In general, you should not use objects read in until the +-awake method is called. + + +Acknowledgements +================ + +The GNU Objective C team: Geoffrey Knauth <gsk@marble.com> (manager), +Tom Wood <wood@next.com> (compiler) and Kresten Krab Thorup +<krab@iesd.auc.dk> (runtime) would like to thank a some people for +participating in the development of the present GNU Objective C. + +Paul Burchard <burchard@geom.umn.edu> and Andrew McCallum +<mccallum@cs.rochester.edu> has been very helpful debugging the +runtime. Eric Herring <herring@iesd.auc.dk> has been very helpful +cleaning up after the documentation-copyright disaster and is now +helping with the new documentation. + +Steve Naroff <snaroff@next.com> and Richard Stallman +<rms@gnu.ai.mit.edu> has been very helpful with implementation details +in the compiler. + + +Bug Reports +=========== + +Please read the section `Submitting Bugreports' of the gcc manual +before you submit any bugs. diff --git a/contrib/gcc/objc/config-lang.in b/contrib/gcc/objc/config-lang.in new file mode 100644 index 0000000..f5224bf --- /dev/null +++ b/contrib/gcc/objc/config-lang.in @@ -0,0 +1,40 @@ +# Top level configure fragment for GNU Objective-C +# Copyright (C) 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005 +# Free Software Foundation, Inc. + +#This file is part of GCC. + +#GCC is free software; you can redistribute it and/or modify +#it under the terms of the GNU General Public License as published by +#the Free Software Foundation; either version 2, or (at your option) +#any later version. + +#GCC is distributed in the hope that it will be useful, +#but WITHOUT ANY WARRANTY; without even the implied warranty of +#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +#GNU General Public License for more details. + +#You should have received a copy of the GNU General Public License +#along with GCC; see the file COPYING. If not, write to +#the Free Software Foundation, 51 Franklin Street, Fifth Floor, +#Boston, MA 02110-1301, USA. + +# Configure looks for the existence of this file to auto-config each language. +# We define several parameters used by configure: +# +# language - name of language as it would appear in $(LANGUAGES) +# compilers - value to add to $(COMPILERS) +# stagestuff - files to add to $(STAGESTUFF) + +language="objc" + +compilers="cc1obj\$(exeext)" + +stagestuff="cc1obj\$(exeext)" + +target_libs=target-libobjc + +# Most of the object files for cc1obj actually come from C. +lang_requires="c" + +gtfiles="\$(srcdir)/objc/objc-act.h \$(srcdir)/c-parser.c \$(srcdir)/c-tree.h \$(srcdir)/c-decl.c \$(srcdir)/c-objc-common.c \$(srcdir)/c-common.c \$(srcdir)/c-common.h \$(srcdir)/c-pragma.c \$(srcdir)/objc/objc-act.c" diff --git a/contrib/gcc/objc/lang-specs.h b/contrib/gcc/objc/lang-specs.h new file mode 100644 index 0000000..446fd53 --- /dev/null +++ b/contrib/gcc/objc/lang-specs.h @@ -0,0 +1,54 @@ +/* Definitions for specs for Objective-C. + Copyright (C) 1998, 1999, 2002, 2002, 2003, 2005 + Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +/* This is the contribution to the `default_compilers' array in gcc.c for + objc. */ + + {".m", "@objective-c", 0, 0, 0}, + {"@objective-c", + "%{E|M|MM:cc1obj -E %{traditional|ftraditional|traditional-cpp:-traditional-cpp}\ + %(cpp_options) %(cpp_debug_options)}\ + %{!E:%{!M:%{!MM:\ + %{traditional|ftraditional|traditional-cpp:\ +%eGNU Objective C no longer supports traditional compilation}\ + %{save-temps|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps:%b.mi} %{!save-temps:%g.mi} \n\ + cc1obj -fpreprocessed %{save-temps:%b.mi} %{!save-temps:%g.mi} %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}\ + %{!save-temps:%{!no-integrated-cpp:\ + cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}}\ + %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0}, + {".mi", "@objc-cpp-output", 0, 0, 0}, + {"@objc-cpp-output", + "%{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\ + %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0}, + {"@objective-c-header", + "%{E|M|MM:cc1obj -E %{traditional|ftraditional|traditional-cpp:-traditional-cpp}\ + %(cpp_options) %(cpp_debug_options)}\ + %{!E:%{!M:%{!MM:\ + %{traditional|ftraditional|traditional-cpp:\ +%eGNU Objective C no longer supports traditional compilation}\ + %{save-temps|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps:%b.mi} %{!save-temps:%g.mi} \n\ + cc1obj -fpreprocessed %b.mi %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\ + -o %g.s %{!o*:--output-pch=%i.gch}\ + %W{o*:--output-pch=%*}%V}\ + %{!save-temps:%{!no-integrated-cpp:\ + cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\ + -o %g.s %{!o*:--output-pch=%i.gch}\ + %W{o*:--output-pch=%*}%V}}}}}", 0, 0, 0}, diff --git a/contrib/gcc/objc/objc-act.c b/contrib/gcc/objc/objc-act.c new file mode 100644 index 0000000..8658185 --- /dev/null +++ b/contrib/gcc/objc/objc-act.c @@ -0,0 +1,9518 @@ +/* Implement classes and message passing for Objective C. + Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000, + 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + Contributed by Steve Naroff. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +/* Purpose: This module implements the Objective-C 4.0 language. + + compatibility issues (with the Stepstone translator): + + - does not recognize the following 3.3 constructs. + @requires, @classes, @messages, = (...) + - methods with variable arguments must conform to ANSI standard. + - tagged structure definitions that appear in BOTH the interface + and implementation are not allowed. + - public/private: all instance variables are public within the + context of the implementation...I consider this to be a bug in + the translator. + - statically allocated objects are not supported. the user will + receive an error if this service is requested. + + code generation `options': + + */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "tree.h" +#include "rtl.h" +#include "tm_p.h" +#include "expr.h" + +#ifdef OBJCPLUS +#include "cp-tree.h" +#else +#include "c-tree.h" +#endif + +#include "c-common.h" +#include "c-pragma.h" +#include "flags.h" +#include "langhooks.h" +#include "objc-act.h" +#include "input.h" +#include "except.h" +#include "function.h" +#include "output.h" +#include "toplev.h" +#include "ggc.h" +#include "varray.h" +#include "debug.h" +#include "target.h" +#include "diagnostic.h" +#include "cgraph.h" +#include "tree-iterator.h" +#include "libfuncs.h" +#include "hashtab.h" +#include "langhooks-def.h" + +#define OBJC_VOID_AT_END void_list_node + +static unsigned int should_call_super_dealloc = 0; + +/* When building Objective-C++, we are not linking against the C front-end + and so need to replicate the C tree-construction functions in some way. */ +#ifdef OBJCPLUS +#define OBJCP_REMAP_FUNCTIONS +#include "objcp-decl.h" +#endif /* OBJCPLUS */ + +/* This is the default way of generating a method name. */ +/* I am not sure it is really correct. + Perhaps there's a danger that it will make name conflicts + if method names contain underscores. -- rms. */ +#ifndef OBJC_GEN_METHOD_LABEL +#define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME, NUM) \ + do { \ + char *temp; \ + sprintf ((BUF), "_%s_%s_%s_%s", \ + ((IS_INST) ? "i" : "c"), \ + (CLASS_NAME), \ + ((CAT_NAME)? (CAT_NAME) : ""), \ + (SEL_NAME)); \ + for (temp = (BUF); *temp; temp++) \ + if (*temp == ':') *temp = '_'; \ + } while (0) +#endif + +/* These need specifying. */ +#ifndef OBJC_FORWARDING_STACK_OFFSET +#define OBJC_FORWARDING_STACK_OFFSET 0 +#endif + +#ifndef OBJC_FORWARDING_MIN_OFFSET +#define OBJC_FORWARDING_MIN_OFFSET 0 +#endif + +/* Set up for use of obstacks. */ + +#include "obstack.h" + +/* This obstack is used to accumulate the encoding of a data type. */ +static struct obstack util_obstack; + +/* This points to the beginning of obstack contents, so we can free + the whole contents. */ +char *util_firstobj; + +/* The version identifies which language generation and runtime + the module (file) was compiled for, and is recorded in the + module descriptor. */ + +#define OBJC_VERSION (flag_next_runtime ? 6 : 8) +#define PROTOCOL_VERSION 2 + +/* (Decide if these can ever be validly changed.) */ +#define OBJC_ENCODE_INLINE_DEFS 0 +#define OBJC_ENCODE_DONT_INLINE_DEFS 1 + +/*** Private Interface (procedures) ***/ + +/* Used by compile_file. */ + +static void init_objc (void); +static void finish_objc (void); + +/* Code generation. */ + +static tree objc_build_constructor (tree, tree); +static tree build_objc_method_call (int, tree, tree, tree, tree); +static tree get_proto_encoding (tree); +static tree lookup_interface (tree); +static tree objc_add_static_instance (tree, tree); + +static tree start_class (enum tree_code, tree, tree, tree); +static tree continue_class (tree); +static void finish_class (tree); +static void start_method_def (tree); +#ifdef OBJCPLUS +static void objc_start_function (tree, tree, tree, tree); +#else +static void objc_start_function (tree, tree, tree, struct c_arg_info *); +#endif +static tree start_protocol (enum tree_code, tree, tree); +static tree build_method_decl (enum tree_code, tree, tree, tree, bool); +static tree objc_add_method (tree, tree, int); +static tree add_instance_variable (tree, int, tree); +static tree build_ivar_reference (tree); +static tree is_ivar (tree, tree); + +static void build_objc_exception_stuff (void); +static void build_next_objc_exception_stuff (void); + +/* We only need the following for ObjC; ObjC++ will use C++'s definition + of DERIVED_FROM_P. */ +#ifndef OBJCPLUS +static bool objc_derived_from_p (tree, tree); +#define DERIVED_FROM_P(PARENT, CHILD) objc_derived_from_p (PARENT, CHILD) +#endif +static void objc_xref_basetypes (tree, tree); + +static void build_class_template (void); +static void build_selector_template (void); +static void build_category_template (void); +static void build_super_template (void); +static tree build_protocol_initializer (tree, tree, tree, tree, tree); +static tree get_class_ivars (tree, bool); +static tree generate_protocol_list (tree); +static void build_protocol_reference (tree); + +#ifdef OBJCPLUS +static void objc_generate_cxx_cdtors (void); +#endif + +static const char *synth_id_with_class_suffix (const char *, tree); + +/* Hash tables to manage the global pool of method prototypes. */ + +hash *nst_method_hash_list = 0; +hash *cls_method_hash_list = 0; + +static hash hash_lookup (hash *, tree); +static tree lookup_method (tree, tree); +static tree lookup_method_static (tree, tree, int); + +enum string_section +{ + class_names, /* class, category, protocol, module names */ + meth_var_names, /* method and variable names */ + meth_var_types /* method and variable type descriptors */ +}; + +static tree add_objc_string (tree, enum string_section); +static tree build_objc_string_decl (enum string_section); +static void build_selector_table_decl (void); + +/* Protocol additions. */ + +static tree lookup_protocol (tree); +static tree lookup_and_install_protocols (tree); + +/* Type encoding. */ + +static void encode_type_qualifiers (tree); +static void encode_type (tree, int, int); +static void encode_field_decl (tree, int, int); + +#ifdef OBJCPLUS +static void really_start_method (tree, tree); +#else +static void really_start_method (tree, struct c_arg_info *); +#endif +static int comp_proto_with_proto (tree, tree, int); +static void objc_push_parm (tree); +#ifdef OBJCPLUS +static tree objc_get_parm_info (int); +#else +static struct c_arg_info *objc_get_parm_info (int); +#endif + +/* Utilities for debugging and error diagnostics. */ + +static void warn_with_method (const char *, int, tree); +static char *gen_type_name (tree); +static char *gen_type_name_0 (tree); +static char *gen_method_decl (tree); +static char *gen_declaration (tree); + +/* Everything else. */ + +static tree create_field_decl (tree, const char *); +static void add_class_reference (tree); +static void build_protocol_template (void); +static tree encode_method_prototype (tree); +static void generate_classref_translation_entry (tree); +static void handle_class_ref (tree); +static void generate_struct_by_value_array (void) + ATTRIBUTE_NORETURN; +static void mark_referenced_methods (void); +static void generate_objc_image_info (void); + +/*** Private Interface (data) ***/ + +/* Reserved tag definitions. */ + +#define OBJECT_TYPEDEF_NAME "id" +#define CLASS_TYPEDEF_NAME "Class" + +#define TAG_OBJECT "objc_object" +#define TAG_CLASS "objc_class" +#define TAG_SUPER "objc_super" +#define TAG_SELECTOR "objc_selector" + +#define UTAG_CLASS "_objc_class" +#define UTAG_IVAR "_objc_ivar" +#define UTAG_IVAR_LIST "_objc_ivar_list" +#define UTAG_METHOD "_objc_method" +#define UTAG_METHOD_LIST "_objc_method_list" +#define UTAG_CATEGORY "_objc_category" +#define UTAG_MODULE "_objc_module" +#define UTAG_SYMTAB "_objc_symtab" +#define UTAG_SUPER "_objc_super" +#define UTAG_SELECTOR "_objc_selector" + +#define UTAG_PROTOCOL "_objc_protocol" +#define UTAG_METHOD_PROTOTYPE "_objc_method_prototype" +#define UTAG_METHOD_PROTOTYPE_LIST "_objc__method_prototype_list" + +/* Note that the string object global name is only needed for the + NeXT runtime. */ +#define STRING_OBJECT_GLOBAL_FORMAT "_%sClassReference" + +#define PROTOCOL_OBJECT_CLASS_NAME "Protocol" + +static const char *TAG_GETCLASS; +static const char *TAG_GETMETACLASS; +static const char *TAG_MSGSEND; +static const char *TAG_MSGSENDSUPER; +/* The NeXT Objective-C messenger may have two extra entry points, for use + when returning a structure. */ +static const char *TAG_MSGSEND_STRET; +static const char *TAG_MSGSENDSUPER_STRET; +static const char *default_constant_string_class_name; + +/* Runtime metadata flags. */ +#define CLS_FACTORY 0x0001L +#define CLS_META 0x0002L +#define CLS_HAS_CXX_STRUCTORS 0x2000L + +#define OBJC_MODIFIER_STATIC 0x00000001 +#define OBJC_MODIFIER_FINAL 0x00000002 +#define OBJC_MODIFIER_PUBLIC 0x00000004 +#define OBJC_MODIFIER_PRIVATE 0x00000008 +#define OBJC_MODIFIER_PROTECTED 0x00000010 +#define OBJC_MODIFIER_NATIVE 0x00000020 +#define OBJC_MODIFIER_SYNCHRONIZED 0x00000040 +#define OBJC_MODIFIER_ABSTRACT 0x00000080 +#define OBJC_MODIFIER_VOLATILE 0x00000100 +#define OBJC_MODIFIER_TRANSIENT 0x00000200 +#define OBJC_MODIFIER_NONE_SPECIFIED 0x80000000 + +/* NeXT-specific tags. */ + +#define TAG_MSGSEND_NONNIL "objc_msgSendNonNil" +#define TAG_MSGSEND_NONNIL_STRET "objc_msgSendNonNil_stret" +#define TAG_EXCEPTIONEXTRACT "objc_exception_extract" +#define TAG_EXCEPTIONTRYENTER "objc_exception_try_enter" +#define TAG_EXCEPTIONTRYEXIT "objc_exception_try_exit" +#define TAG_EXCEPTIONMATCH "objc_exception_match" +#define TAG_EXCEPTIONTHROW "objc_exception_throw" +#define TAG_SYNCENTER "objc_sync_enter" +#define TAG_SYNCEXIT "objc_sync_exit" +#define TAG_SETJMP "_setjmp" +#define UTAG_EXCDATA "_objc_exception_data" + +#define TAG_ASSIGNIVAR "objc_assign_ivar" +#define TAG_ASSIGNGLOBAL "objc_assign_global" +#define TAG_ASSIGNSTRONGCAST "objc_assign_strongCast" + +/* Branch entry points. All that matters here are the addresses; + functions with these names do not really exist in libobjc. */ + +#define TAG_MSGSEND_FAST "objc_msgSend_Fast" +#define TAG_ASSIGNIVAR_FAST "objc_assign_ivar_Fast" + +#define TAG_CXX_CONSTRUCT ".cxx_construct" +#define TAG_CXX_DESTRUCT ".cxx_destruct" + +/* GNU-specific tags. */ + +#define TAG_EXECCLASS "__objc_exec_class" +#define TAG_GNUINIT "__objc_gnu_init" + +/* Flags for lookup_method_static(). */ +#define OBJC_LOOKUP_CLASS 1 /* Look for class methods. */ +#define OBJC_LOOKUP_NO_SUPER 2 /* Do not examine superclasses. */ + +/* The OCTI_... enumeration itself is in objc/objc-act.h. */ +tree objc_global_trees[OCTI_MAX]; + +static void handle_impent (struct imp_entry *); + +struct imp_entry *imp_list = 0; +int imp_count = 0; /* `@implementation' */ +int cat_count = 0; /* `@category' */ + +enum tree_code objc_inherit_code; +int objc_public_flag; + +/* Use to generate method labels. */ +static int method_slot = 0; + +#define BUFSIZE 1024 + +static char *errbuf; /* Buffer for error diagnostics */ + +/* Data imported from tree.c. */ + +extern enum debug_info_type write_symbols; + +/* Data imported from toplev.c. */ + +extern const char *dump_base_name; + +static int flag_typed_selectors; + +/* Store all constructed constant strings in a hash table so that + they get uniqued properly. */ + +struct string_descriptor GTY(()) +{ + /* The literal argument . */ + tree literal; + + /* The resulting constant string. */ + tree constructor; +}; + +static GTY((param_is (struct string_descriptor))) htab_t string_htab; + +/* Store the EH-volatilized types in a hash table, for easy retrieval. */ +struct volatilized_type GTY(()) +{ + tree type; +}; + +static GTY((param_is (struct volatilized_type))) htab_t volatilized_htab; + +FILE *gen_declaration_file; + +/* Tells "encode_pointer/encode_aggregate" whether we are generating + type descriptors for instance variables (as opposed to methods). + Type descriptors for instance variables contain more information + than methods (for static typing and embedded structures). */ + +static int generating_instance_variables = 0; + +/* Some platforms pass small structures through registers versus + through an invisible pointer. Determine at what size structure is + the transition point between the two possibilities. */ + +static void +generate_struct_by_value_array (void) +{ + tree type; + tree field_decl, field_decl_chain; + int i, j; + int aggregate_in_mem[32]; + int found = 0; + + /* Presumably no platform passes 32 byte structures in a register. */ + for (i = 1; i < 32; i++) + { + char buffer[5]; + + /* Create an unnamed struct that has `i' character components */ + type = start_struct (RECORD_TYPE, NULL_TREE); + + strcpy (buffer, "c1"); + field_decl = create_field_decl (char_type_node, + buffer); + field_decl_chain = field_decl; + + for (j = 1; j < i; j++) + { + sprintf (buffer, "c%d", j + 1); + field_decl = create_field_decl (char_type_node, + buffer); + chainon (field_decl_chain, field_decl); + } + finish_struct (type, field_decl_chain, NULL_TREE); + + aggregate_in_mem[i] = aggregate_value_p (type, 0); + if (!aggregate_in_mem[i]) + found = 1; + } + + /* We found some structures that are returned in registers instead of memory + so output the necessary data. */ + if (found) + { + for (i = 31; i >= 0; i--) + if (!aggregate_in_mem[i]) + break; + printf ("#define OBJC_MAX_STRUCT_BY_VALUE %d\n\n", i); + + /* The first member of the structure is always 0 because we don't handle + structures with 0 members */ + printf ("static int struct_forward_array[] = {\n 0"); + + for (j = 1; j <= i; j++) + printf (", %d", aggregate_in_mem[j]); + printf ("\n};\n"); + } + + exit (0); +} + +bool +objc_init (void) +{ +#ifdef OBJCPLUS + if (cxx_init () == false) +#else + if (c_objc_common_init () == false) +#endif + return false; + +#ifndef USE_MAPPED_LOCATION + /* Force the line number back to 0; check_newline will have + raised it to 1, which will make the builtin functions appear + not to be built in. */ + input_line = 0; +#endif + + /* If gen_declaration desired, open the output file. */ + if (flag_gen_declaration) + { + register char * const dumpname = concat (dump_base_name, ".decl", NULL); + gen_declaration_file = fopen (dumpname, "w"); + if (gen_declaration_file == 0) + fatal_error ("can't open %s: %m", dumpname); + free (dumpname); + } + + if (flag_next_runtime) + { + TAG_GETCLASS = "objc_getClass"; + TAG_GETMETACLASS = "objc_getMetaClass"; + TAG_MSGSEND = "objc_msgSend"; + TAG_MSGSENDSUPER = "objc_msgSendSuper"; + TAG_MSGSEND_STRET = "objc_msgSend_stret"; + TAG_MSGSENDSUPER_STRET = "objc_msgSendSuper_stret"; + default_constant_string_class_name = "NSConstantString"; + } + else + { + TAG_GETCLASS = "objc_get_class"; + TAG_GETMETACLASS = "objc_get_meta_class"; + TAG_MSGSEND = "objc_msg_lookup"; + TAG_MSGSENDSUPER = "objc_msg_lookup_super"; + /* GNU runtime does not provide special functions to support + structure-returning methods. */ + default_constant_string_class_name = "NXConstantString"; + flag_typed_selectors = 1; + } + + init_objc (); + + if (print_struct_values) + generate_struct_by_value_array (); + + return true; +} + +void +objc_finish_file (void) +{ + mark_referenced_methods (); + +#ifdef OBJCPLUS + /* We need to instantiate templates _before_ we emit ObjC metadata; + if we do not, some metadata (such as selectors) may go missing. */ + at_eof = 1; + instantiate_pending_templates (0); +#endif + + /* Finalize Objective-C runtime data. No need to generate tables + and code if only checking syntax, or if generating a PCH file. */ + if (!flag_syntax_only && !pch_file) + finish_objc (); + + if (gen_declaration_file) + fclose (gen_declaration_file); + +#ifdef OBJCPLUS + cp_finish_file (); +#endif +} + +/* Return the first occurrence of a method declaration corresponding + to sel_name in rproto_list. Search rproto_list recursively. + If is_class is 0, search for instance methods, otherwise for class + methods. */ +static tree +lookup_method_in_protocol_list (tree rproto_list, tree sel_name, + int is_class) +{ + tree rproto, p; + tree fnd = 0; + + for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) + { + p = TREE_VALUE (rproto); + + if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) + { + if ((fnd = lookup_method (is_class + ? PROTOCOL_CLS_METHODS (p) + : PROTOCOL_NST_METHODS (p), sel_name))) + ; + else if (PROTOCOL_LIST (p)) + fnd = lookup_method_in_protocol_list (PROTOCOL_LIST (p), + sel_name, is_class); + } + else + { + ; /* An identifier...if we could not find a protocol. */ + } + + if (fnd) + return fnd; + } + + return 0; +} + +static tree +lookup_protocol_in_reflist (tree rproto_list, tree lproto) +{ + tree rproto, p; + + /* Make sure the protocol is supported by the object on the rhs. */ + if (TREE_CODE (lproto) == PROTOCOL_INTERFACE_TYPE) + { + tree fnd = 0; + for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto)) + { + p = TREE_VALUE (rproto); + + if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) + { + if (lproto == p) + fnd = lproto; + + else if (PROTOCOL_LIST (p)) + fnd = lookup_protocol_in_reflist (PROTOCOL_LIST (p), lproto); + } + + if (fnd) + return fnd; + } + } + else + { + ; /* An identifier...if we could not find a protocol. */ + } + + return 0; +} + +void +objc_start_class_interface (tree class, tree super_class, tree protos) +{ + objc_interface_context + = objc_ivar_context + = start_class (CLASS_INTERFACE_TYPE, class, super_class, protos); + objc_public_flag = 0; +} + +void +objc_start_category_interface (tree class, tree categ, tree protos) +{ + objc_interface_context + = start_class (CATEGORY_INTERFACE_TYPE, class, categ, protos); + objc_ivar_chain + = continue_class (objc_interface_context); +} + +void +objc_start_protocol (tree name, tree protos) +{ + objc_interface_context + = start_protocol (PROTOCOL_INTERFACE_TYPE, name, protos); +} + +void +objc_continue_interface (void) +{ + objc_ivar_chain + = continue_class (objc_interface_context); +} + +void +objc_finish_interface (void) +{ + finish_class (objc_interface_context); + objc_interface_context = NULL_TREE; +} + +void +objc_start_class_implementation (tree class, tree super_class) +{ + objc_implementation_context + = objc_ivar_context + = start_class (CLASS_IMPLEMENTATION_TYPE, class, super_class, NULL_TREE); + objc_public_flag = 0; +} + +void +objc_start_category_implementation (tree class, tree categ) +{ + objc_implementation_context + = start_class (CATEGORY_IMPLEMENTATION_TYPE, class, categ, NULL_TREE); + objc_ivar_chain + = continue_class (objc_implementation_context); +} + +void +objc_continue_implementation (void) +{ + objc_ivar_chain + = continue_class (objc_implementation_context); +} + +void +objc_finish_implementation (void) +{ +#ifdef OBJCPLUS + if (flag_objc_call_cxx_cdtors) + objc_generate_cxx_cdtors (); +#endif + + if (objc_implementation_context) + { + finish_class (objc_implementation_context); + objc_ivar_chain = NULL_TREE; + objc_implementation_context = NULL_TREE; + } + else + warning (0, "%<@end%> must appear in an @implementation context"); +} + +void +objc_set_visibility (int visibility) +{ + objc_public_flag = visibility; +} + +void +objc_set_method_type (enum tree_code type) +{ + objc_inherit_code = (type == PLUS_EXPR + ? CLASS_METHOD_DECL + : INSTANCE_METHOD_DECL); +} + +tree +objc_build_method_signature (tree rettype, tree selector, + tree optparms, bool ellipsis) +{ + return build_method_decl (objc_inherit_code, rettype, selector, + optparms, ellipsis); +} + +void +objc_add_method_declaration (tree decl) +{ + if (!objc_interface_context) + fatal_error ("method declaration not in @interface context"); + + objc_add_method (objc_interface_context, + decl, + objc_inherit_code == CLASS_METHOD_DECL); +} + +void +objc_start_method_definition (tree decl) +{ + if (!objc_implementation_context) + fatal_error ("method definition not in @implementation context"); + + objc_add_method (objc_implementation_context, + decl, + objc_inherit_code == CLASS_METHOD_DECL); + start_method_def (decl); +} + +void +objc_add_instance_variable (tree decl) +{ + (void) add_instance_variable (objc_ivar_context, + objc_public_flag, + decl); +} + +/* Return 1 if IDENT is an ObjC/ObjC++ reserved keyword in the context of + an '@'. */ + +int +objc_is_reserved_word (tree ident) +{ + unsigned char code = C_RID_CODE (ident); + + return (OBJC_IS_AT_KEYWORD (code) +#ifdef OBJCPLUS + || code == RID_CLASS || code == RID_PUBLIC + || code == RID_PROTECTED || code == RID_PRIVATE + || code == RID_TRY || code == RID_THROW || code == RID_CATCH +#endif + ); +} + +/* Return true if TYPE is 'id'. */ + +static bool +objc_is_object_id (tree type) +{ + return OBJC_TYPE_NAME (type) == objc_object_id; +} + +static bool +objc_is_class_id (tree type) +{ + return OBJC_TYPE_NAME (type) == objc_class_id; +} + +/* Construct a C struct with same name as CLASS, a base struct with tag + SUPER_NAME (if any), and FIELDS indicated. */ + +static tree +objc_build_struct (tree class, tree fields, tree super_name) +{ + tree name = CLASS_NAME (class); + tree s = start_struct (RECORD_TYPE, name); + tree super = (super_name ? xref_tag (RECORD_TYPE, super_name) : NULL_TREE); + tree t, objc_info = NULL_TREE; + + if (super) + { + /* Prepend a packed variant of the base class into the layout. This + is necessary to preserve ObjC ABI compatibility. */ + tree base = build_decl (FIELD_DECL, NULL_TREE, super); + tree field = TYPE_FIELDS (super); + + while (field && TREE_CHAIN (field) + && TREE_CODE (TREE_CHAIN (field)) == FIELD_DECL) + field = TREE_CHAIN (field); + + /* For ObjC ABI purposes, the "packed" size of a base class is the + the sum of the offset and the size (in bits) of the last field + in the class. */ + DECL_SIZE (base) + = (field && TREE_CODE (field) == FIELD_DECL + ? size_binop (PLUS_EXPR, + size_binop (PLUS_EXPR, + size_binop + (MULT_EXPR, + convert (bitsizetype, + DECL_FIELD_OFFSET (field)), + bitsize_int (BITS_PER_UNIT)), + DECL_FIELD_BIT_OFFSET (field)), + DECL_SIZE (field)) + : bitsize_zero_node); + DECL_SIZE_UNIT (base) + = size_binop (FLOOR_DIV_EXPR, convert (sizetype, DECL_SIZE (base)), + size_int (BITS_PER_UNIT)); + DECL_ARTIFICIAL (base) = 1; + DECL_ALIGN (base) = 1; + DECL_FIELD_CONTEXT (base) = s; +#ifdef OBJCPLUS + DECL_FIELD_IS_BASE (base) = 1; + + if (fields) + TREE_NO_WARNING (fields) = 1; /* Suppress C++ ABI warnings -- we */ +#endif /* are following the ObjC ABI here. */ + TREE_CHAIN (base) = fields; + fields = base; + } + + /* NB: Calling finish_struct() may cause type TYPE_LANG_SPECIFIC fields + in all variants of this RECORD_TYPE to be clobbered, but it is therein + that we store protocol conformance info (e.g., 'NSObject <MyProtocol>'). + Hence, we must squirrel away the ObjC-specific information before calling + finish_struct(), and then reinstate it afterwards. */ + + for (t = TYPE_NEXT_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t)) + objc_info + = chainon (objc_info, + build_tree_list (NULL_TREE, TYPE_OBJC_INFO (t))); + + /* Point the struct at its related Objective-C class. */ + INIT_TYPE_OBJC_INFO (s); + TYPE_OBJC_INTERFACE (s) = class; + + s = finish_struct (s, fields, NULL_TREE); + + for (t = TYPE_NEXT_VARIANT (s); t; + t = TYPE_NEXT_VARIANT (t), objc_info = TREE_CHAIN (objc_info)) + { + TYPE_OBJC_INFO (t) = TREE_VALUE (objc_info); + /* Replace the IDENTIFIER_NODE with an actual @interface. */ + TYPE_OBJC_INTERFACE (t) = class; + } + + /* Use TYPE_BINFO structures to point at the super class, if any. */ + objc_xref_basetypes (s, super); + + /* Mark this struct as a class template. */ + CLASS_STATIC_TEMPLATE (class) = s; + + return s; +} + +/* Build a type differing from TYPE only in that TYPE_VOLATILE is set. + Unlike tree.c:build_qualified_type(), preserve TYPE_LANG_SPECIFIC in the + process. */ +static tree +objc_build_volatilized_type (tree type) +{ + tree t; + + /* Check if we have not constructed the desired variant already. */ + for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) + { + /* The type qualifiers must (obviously) match up. */ + if (!TYPE_VOLATILE (t) + || (TYPE_READONLY (t) != TYPE_READONLY (type)) + || (TYPE_RESTRICT (t) != TYPE_RESTRICT (type))) + continue; + + /* For pointer types, the pointees (and hence their TYPE_LANG_SPECIFIC + info, if any) must match up. */ + if (POINTER_TYPE_P (t) + && (TREE_TYPE (t) != TREE_TYPE (type))) + continue; + + /* Everything matches up! */ + return t; + } + + /* Ok, we could not re-use any of the pre-existing variants. Create + a new one. */ + t = build_variant_type_copy (type); + TYPE_VOLATILE (t) = 1; + + return t; +} + +/* Mark DECL as being 'volatile' for purposes of Darwin + _setjmp()/_longjmp() exception handling. Called from + objc_mark_locals_volatile(). */ +void +objc_volatilize_decl (tree decl) +{ + /* Do not mess with variables that are 'static' or (already) + 'volatile'. */ + if (!TREE_THIS_VOLATILE (decl) && !TREE_STATIC (decl) + && (TREE_CODE (decl) == VAR_DECL + || TREE_CODE (decl) == PARM_DECL)) + { + tree t = TREE_TYPE (decl); + struct volatilized_type key; + void **loc; + + t = objc_build_volatilized_type (t); + key.type = t; + loc = htab_find_slot (volatilized_htab, &key, INSERT); + + if (!*loc) + { + *loc = ggc_alloc (sizeof (key)); + ((struct volatilized_type *) *loc)->type = t; + } + + TREE_TYPE (decl) = t; + TREE_THIS_VOLATILE (decl) = 1; + TREE_SIDE_EFFECTS (decl) = 1; + DECL_REGISTER (decl) = 0; +#ifndef OBJCPLUS + C_DECL_REGISTER (decl) = 0; +#endif + } +} + +/* Check if protocol PROTO is adopted (directly or indirectly) by class CLS + (including its categoreis and superclasses) or by object type TYP. + Issue a warning if PROTO is not adopted anywhere and WARN is set. */ + +static bool +objc_lookup_protocol (tree proto, tree cls, tree typ, bool warn) +{ + bool class_type = (cls != NULL_TREE); + + while (cls) + { + tree c; + + /* Check protocols adopted by the class and its categories. */ + for (c = cls; c; c = CLASS_CATEGORY_LIST (c)) + { + if (lookup_protocol_in_reflist (CLASS_PROTOCOL_LIST (c), proto)) + return true; + } + + /* Repeat for superclasses. */ + cls = lookup_interface (CLASS_SUPER_NAME (cls)); + } + + /* Check for any protocols attached directly to the object type. */ + if (TYPE_HAS_OBJC_INFO (typ)) + { + if (lookup_protocol_in_reflist (TYPE_OBJC_PROTOCOL_LIST (typ), proto)) + return true; + } + + if (warn) + { + strcpy (errbuf, class_type ? "class \'" : "type \'"); + gen_type_name_0 (class_type ? typ : TYPE_POINTER_TO (typ)); + strcat (errbuf, "\' does not "); + /* NB: Types 'id' and 'Class' cannot reasonably be described as + "implementing" a given protocol, since they do not have an + implementation. */ + strcat (errbuf, class_type ? "implement" : "conform to"); + strcat (errbuf, " the \'"); + strcat (errbuf, IDENTIFIER_POINTER (PROTOCOL_NAME (proto))); + strcat (errbuf, "\' protocol"); + warning (0, errbuf); + } + + return false; +} + +/* Check if class RCLS and instance struct type RTYP conform to at least the + same protocols that LCLS and LTYP conform to. */ + +static bool +objc_compare_protocols (tree lcls, tree ltyp, tree rcls, tree rtyp, bool warn) +{ + tree p; + bool have_lproto = false; + + while (lcls) + { + /* NB: We do _not_ look at categories defined for LCLS; these may or + may not get loaded in, and therefore it is unreasonable to require + that RCLS/RTYP must implement any of their protocols. */ + for (p = CLASS_PROTOCOL_LIST (lcls); p; p = TREE_CHAIN (p)) + { + have_lproto = true; + + if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn)) + return warn; + } + + /* Repeat for superclasses. */ + lcls = lookup_interface (CLASS_SUPER_NAME (lcls)); + } + + /* Check for any protocols attached directly to the object type. */ + if (TYPE_HAS_OBJC_INFO (ltyp)) + { + for (p = TYPE_OBJC_PROTOCOL_LIST (ltyp); p; p = TREE_CHAIN (p)) + { + have_lproto = true; + + if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn)) + return warn; + } + } + + /* NB: If LTYP and LCLS have no protocols to search for, return 'true' + vacuously, _unless_ RTYP is a protocol-qualified 'id'. We can get + away with simply checking for 'id' or 'Class' (!RCLS), since this + routine will not get called in other cases. */ + return have_lproto || (rcls != NULL_TREE); +} + +/* Determine if it is permissible to assign (if ARGNO is greater than -3) + an instance of RTYP to an instance of LTYP or to compare the two + (if ARGNO is equal to -3), per ObjC type system rules. Before + returning 'true', this routine may issue warnings related to, e.g., + protocol conformance. When returning 'false', the routine must + produce absolutely no warnings; the C or C++ front-end will do so + instead, if needed. If either LTYP or RTYP is not an Objective-C type, + the routine must return 'false'. + + The ARGNO parameter is encoded as follows: + >= 1 Parameter number (CALLEE contains function being called); + 0 Return value; + -1 Assignment; + -2 Initialization; + -3 Comparison (LTYP and RTYP may match in either direction). */ + +bool +objc_compare_types (tree ltyp, tree rtyp, int argno, tree callee) +{ + tree lcls, rcls, lproto, rproto; + bool pointers_compatible; + + /* We must be dealing with pointer types */ + if (!POINTER_TYPE_P (ltyp) || !POINTER_TYPE_P (rtyp)) + return false; + + do + { + ltyp = TREE_TYPE (ltyp); /* Remove indirections. */ + rtyp = TREE_TYPE (rtyp); + } + while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp)); + + /* Past this point, we are only interested in ObjC class instances, + or 'id' or 'Class'. */ + if (TREE_CODE (ltyp) != RECORD_TYPE || TREE_CODE (rtyp) != RECORD_TYPE) + return false; + + if (!objc_is_object_id (ltyp) && !objc_is_class_id (ltyp) + && !TYPE_HAS_OBJC_INFO (ltyp)) + return false; + + if (!objc_is_object_id (rtyp) && !objc_is_class_id (rtyp) + && !TYPE_HAS_OBJC_INFO (rtyp)) + return false; + + /* Past this point, we are committed to returning 'true' to the caller. + However, we can still warn about type and/or protocol mismatches. */ + + if (TYPE_HAS_OBJC_INFO (ltyp)) + { + lcls = TYPE_OBJC_INTERFACE (ltyp); + lproto = TYPE_OBJC_PROTOCOL_LIST (ltyp); + } + else + lcls = lproto = NULL_TREE; + + if (TYPE_HAS_OBJC_INFO (rtyp)) + { + rcls = TYPE_OBJC_INTERFACE (rtyp); + rproto = TYPE_OBJC_PROTOCOL_LIST (rtyp); + } + else + rcls = rproto = NULL_TREE; + + /* If we could not find an @interface declaration, we must have + only seen a @class declaration; for purposes of type comparison, + treat it as a stand-alone (root) class. */ + + if (lcls && TREE_CODE (lcls) == IDENTIFIER_NODE) + lcls = NULL_TREE; + + if (rcls && TREE_CODE (rcls) == IDENTIFIER_NODE) + rcls = NULL_TREE; + + /* If either type is an unqualified 'id', we're done. */ + if ((!lproto && objc_is_object_id (ltyp)) + || (!rproto && objc_is_object_id (rtyp))) + return true; + + pointers_compatible = (TYPE_MAIN_VARIANT (ltyp) == TYPE_MAIN_VARIANT (rtyp)); + + /* If the underlying types are the same, and at most one of them has + a protocol list, we do not need to issue any diagnostics. */ + if (pointers_compatible && (!lproto || !rproto)) + return true; + + /* If exactly one of the types is 'Class', issue a diagnostic; any + exceptions of this rule have already been handled. */ + if (objc_is_class_id (ltyp) ^ objc_is_class_id (rtyp)) + pointers_compatible = false; + /* Otherwise, check for inheritance relations. */ + else + { + if (!pointers_compatible) + pointers_compatible + = (objc_is_object_id (ltyp) || objc_is_object_id (rtyp)); + + if (!pointers_compatible) + pointers_compatible = DERIVED_FROM_P (ltyp, rtyp); + + if (!pointers_compatible && argno == -3) + pointers_compatible = DERIVED_FROM_P (rtyp, ltyp); + } + + /* If the pointers match modulo protocols, check for protocol conformance + mismatches. */ + if (pointers_compatible) + { + pointers_compatible = objc_compare_protocols (lcls, ltyp, rcls, rtyp, + argno != -3); + + if (!pointers_compatible && argno == -3) + pointers_compatible = objc_compare_protocols (rcls, rtyp, lcls, ltyp, + argno != -3); + } + + if (!pointers_compatible) + { + /* NB: For the time being, we shall make our warnings look like their + C counterparts. In the future, we may wish to make them more + ObjC-specific. */ + switch (argno) + { + case -3: + warning (0, "comparison of distinct Objective-C types lacks a cast"); + break; + + case -2: + warning (0, "initialization from distinct Objective-C type"); + break; + + case -1: + warning (0, "assignment from distinct Objective-C type"); + break; + + case 0: + warning (0, "distinct Objective-C type in return"); + break; + + default: + warning (0, "passing argument %d of %qE from distinct " + "Objective-C type", argno, callee); + break; + } + } + + return true; +} + +/* Check if LTYP and RTYP have the same type qualifiers. If either type + lives in the volatilized hash table, ignore the 'volatile' bit when + making the comparison. */ + +bool +objc_type_quals_match (tree ltyp, tree rtyp) +{ + int lquals = TYPE_QUALS (ltyp), rquals = TYPE_QUALS (rtyp); + struct volatilized_type key; + + key.type = ltyp; + + if (htab_find_slot (volatilized_htab, &key, NO_INSERT)) + lquals &= ~TYPE_QUAL_VOLATILE; + + key.type = rtyp; + + if (htab_find_slot (volatilized_htab, &key, NO_INSERT)) + rquals &= ~TYPE_QUAL_VOLATILE; + + return (lquals == rquals); +} + +#ifndef OBJCPLUS +/* Determine if CHILD is derived from PARENT. The routine assumes that + both parameters are RECORD_TYPEs, and is non-reflexive. */ + +static bool +objc_derived_from_p (tree parent, tree child) +{ + parent = TYPE_MAIN_VARIANT (parent); + + for (child = TYPE_MAIN_VARIANT (child); + TYPE_BINFO (child) && BINFO_N_BASE_BINFOS (TYPE_BINFO (child));) + { + child = TYPE_MAIN_VARIANT (BINFO_TYPE (BINFO_BASE_BINFO + (TYPE_BINFO (child), + 0))); + + if (child == parent) + return true; + } + + return false; +} +#endif + +static tree +objc_build_component_ref (tree datum, tree component) +{ + /* If COMPONENT is NULL, the caller is referring to the anonymous + base class field. */ + if (!component) + { + tree base = TYPE_FIELDS (TREE_TYPE (datum)); + + return build3 (COMPONENT_REF, TREE_TYPE (base), datum, base, NULL_TREE); + } + + /* The 'build_component_ref' routine has been removed from the C++ + front-end, but 'finish_class_member_access_expr' seems to be + a worthy substitute. */ +#ifdef OBJCPLUS + return finish_class_member_access_expr (datum, component, false); +#else + return build_component_ref (datum, component); +#endif +} + +/* Recursively copy inheritance information rooted at BINFO. To do this, + we emulate the song and dance performed by cp/tree.c:copy_binfo(). */ + +static tree +objc_copy_binfo (tree binfo) +{ + tree btype = BINFO_TYPE (binfo); + tree binfo2 = make_tree_binfo (BINFO_N_BASE_BINFOS (binfo)); + tree base_binfo; + int ix; + + BINFO_TYPE (binfo2) = btype; + BINFO_OFFSET (binfo2) = BINFO_OFFSET (binfo); + BINFO_BASE_ACCESSES (binfo2) = BINFO_BASE_ACCESSES (binfo); + + /* Recursively copy base binfos of BINFO. */ + for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) + { + tree base_binfo2 = objc_copy_binfo (base_binfo); + + BINFO_INHERITANCE_CHAIN (base_binfo2) = binfo2; + BINFO_BASE_APPEND (binfo2, base_binfo2); + } + + return binfo2; +} + +/* Record superclass information provided in BASETYPE for ObjC class REF. + This is loosely based on cp/decl.c:xref_basetypes(). */ + +static void +objc_xref_basetypes (tree ref, tree basetype) +{ + tree binfo = make_tree_binfo (basetype ? 1 : 0); + + TYPE_BINFO (ref) = binfo; + BINFO_OFFSET (binfo) = size_zero_node; + BINFO_TYPE (binfo) = ref; + + if (basetype) + { + tree base_binfo = objc_copy_binfo (TYPE_BINFO (basetype)); + + BINFO_INHERITANCE_CHAIN (base_binfo) = binfo; + BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, 1); + BINFO_BASE_APPEND (binfo, base_binfo); + BINFO_BASE_ACCESS_APPEND (binfo, access_public_node); + } +} + +static hashval_t +volatilized_hash (const void *ptr) +{ + tree typ = ((struct volatilized_type *)ptr)->type; + + return htab_hash_pointer(typ); +} + +static int +volatilized_eq (const void *ptr1, const void *ptr2) +{ + tree typ1 = ((struct volatilized_type *)ptr1)->type; + tree typ2 = ((struct volatilized_type *)ptr2)->type; + + return typ1 == typ2; +} + +/* Called from finish_decl. */ + +void +objc_check_decl (tree decl) +{ + tree type = TREE_TYPE (decl); + + if (TREE_CODE (type) != RECORD_TYPE) + return; + if (OBJC_TYPE_NAME (type) && (type = objc_is_class_name (OBJC_TYPE_NAME (type)))) + error ("statically allocated instance of Objective-C class %qs", + IDENTIFIER_POINTER (type)); +} + +/* Construct a PROTOCOLS-qualified variant of INTERFACE, where INTERFACE may + either name an Objective-C class, or refer to the special 'id' or 'Class' + types. If INTERFACE is not a valid ObjC type, just return it unchanged. */ + +tree +objc_get_protocol_qualified_type (tree interface, tree protocols) +{ + /* If INTERFACE is not provided, default to 'id'. */ + tree type = (interface ? objc_is_id (interface) : objc_object_type); + bool is_ptr = (type != NULL_TREE); + + if (!is_ptr) + { + type = objc_is_class_name (interface); + + if (type) + type = xref_tag (RECORD_TYPE, type); + else + return interface; + } + + if (protocols) + { + type = build_variant_type_copy (type); + + /* For pointers (i.e., 'id' or 'Class'), attach the protocol(s) + to the pointee. */ + if (is_ptr) + { + TREE_TYPE (type) = build_variant_type_copy (TREE_TYPE (type)); + TYPE_POINTER_TO (TREE_TYPE (type)) = type; + type = TREE_TYPE (type); + } + + /* Look up protocols and install in lang specific list. */ + DUP_TYPE_OBJC_INFO (type, TYPE_MAIN_VARIANT (type)); + TYPE_OBJC_PROTOCOL_LIST (type) = lookup_and_install_protocols (protocols); + + /* For RECORD_TYPEs, point to the @interface; for 'id' and 'Class', + return the pointer to the new pointee variant. */ + if (is_ptr) + type = TYPE_POINTER_TO (type); + else + TYPE_OBJC_INTERFACE (type) + = TYPE_OBJC_INTERFACE (TYPE_MAIN_VARIANT (type)); + } + + return type; +} + +/* Check for circular dependencies in protocols. The arguments are + PROTO, the protocol to check, and LIST, a list of protocol it + conforms to. */ + +static void +check_protocol_recursively (tree proto, tree list) +{ + tree p; + + for (p = list; p; p = TREE_CHAIN (p)) + { + tree pp = TREE_VALUE (p); + + if (TREE_CODE (pp) == IDENTIFIER_NODE) + pp = lookup_protocol (pp); + + if (pp == proto) + fatal_error ("protocol %qs has circular dependency", + IDENTIFIER_POINTER (PROTOCOL_NAME (pp))); + if (pp) + check_protocol_recursively (proto, PROTOCOL_LIST (pp)); + } +} + +/* Look up PROTOCOLS, and return a list of those that are found. + If none are found, return NULL. */ + +static tree +lookup_and_install_protocols (tree protocols) +{ + tree proto; + tree return_value = NULL_TREE; + + for (proto = protocols; proto; proto = TREE_CHAIN (proto)) + { + tree ident = TREE_VALUE (proto); + tree p = lookup_protocol (ident); + + if (p) + return_value = chainon (return_value, + build_tree_list (NULL_TREE, p)); + else if (ident != error_mark_node) + error ("cannot find protocol declaration for %qs", + IDENTIFIER_POINTER (ident)); + } + + return return_value; +} + +/* Create a declaration for field NAME of a given TYPE. */ + +static tree +create_field_decl (tree type, const char *name) +{ + return build_decl (FIELD_DECL, get_identifier (name), type); +} + +/* Create a global, static declaration for variable NAME of a given TYPE. The + finish_var_decl() routine will need to be called on it afterwards. */ + +static tree +start_var_decl (tree type, const char *name) +{ + tree var = build_decl (VAR_DECL, get_identifier (name), type); + + TREE_STATIC (var) = 1; + DECL_INITIAL (var) = error_mark_node; /* A real initializer is coming... */ + DECL_IGNORED_P (var) = 1; + DECL_ARTIFICIAL (var) = 1; + DECL_CONTEXT (var) = NULL_TREE; +#ifdef OBJCPLUS + DECL_THIS_STATIC (var) = 1; /* squash redeclaration errors */ +#endif + + return var; +} + +/* Finish off the variable declaration created by start_var_decl(). */ + +static void +finish_var_decl (tree var, tree initializer) +{ + finish_decl (var, initializer, NULL_TREE); + /* Ensure that the variable actually gets output. */ + mark_decl_referenced (var); + /* Mark the decl to avoid "defined but not used" warning. */ + TREE_USED (var) = 1; +} + +/* Find the decl for the constant string class reference. This is only + used for the NeXT runtime. */ + +static tree +setup_string_decl (void) +{ + char *name; + size_t length; + + /* %s in format will provide room for terminating null */ + length = strlen (STRING_OBJECT_GLOBAL_FORMAT) + + strlen (constant_string_class_name); + name = xmalloc (length); + sprintf (name, STRING_OBJECT_GLOBAL_FORMAT, + constant_string_class_name); + constant_string_global_id = get_identifier (name); + string_class_decl = lookup_name (constant_string_global_id); + + return string_class_decl; +} + +/* Purpose: "play" parser, creating/installing representations + of the declarations that are required by Objective-C. + + Model: + + type_spec--------->sc_spec + (tree_list) (tree_list) + | | + | | + identifier_node identifier_node */ + +static void +synth_module_prologue (void) +{ + tree type; + enum debug_info_type save_write_symbols = write_symbols; + const struct gcc_debug_hooks *const save_hooks = debug_hooks; + + /* Suppress outputting debug symbols, because + dbxout_init hasn'r been called yet. */ + write_symbols = NO_DEBUG; + debug_hooks = &do_nothing_debug_hooks; + +#ifdef OBJCPLUS + push_lang_context (lang_name_c); /* extern "C" */ +#endif + + /* The following are also defined in <objc/objc.h> and friends. */ + + objc_object_id = get_identifier (TAG_OBJECT); + objc_class_id = get_identifier (TAG_CLASS); + + objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id); + objc_class_reference = xref_tag (RECORD_TYPE, objc_class_id); + + objc_object_type = build_pointer_type (objc_object_reference); + objc_class_type = build_pointer_type (objc_class_reference); + + objc_object_name = get_identifier (OBJECT_TYPEDEF_NAME); + objc_class_name = get_identifier (CLASS_TYPEDEF_NAME); + + /* Declare the 'id' and 'Class' typedefs. */ + + type = lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, + objc_object_name, + objc_object_type)); + DECL_IN_SYSTEM_HEADER (type) = 1; + type = lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, + objc_class_name, + objc_class_type)); + DECL_IN_SYSTEM_HEADER (type) = 1; + + /* Forward-declare '@interface Protocol'. */ + + type = get_identifier (PROTOCOL_OBJECT_CLASS_NAME); + objc_declare_class (tree_cons (NULL_TREE, type, NULL_TREE)); + objc_protocol_type = build_pointer_type (xref_tag (RECORD_TYPE, + type)); + + /* Declare type of selector-objects that represent an operation name. */ + + if (flag_next_runtime) + /* `struct objc_selector *' */ + objc_selector_type + = build_pointer_type (xref_tag (RECORD_TYPE, + get_identifier (TAG_SELECTOR))); + else + /* `const struct objc_selector *' */ + objc_selector_type + = build_pointer_type + (build_qualified_type (xref_tag (RECORD_TYPE, + get_identifier (TAG_SELECTOR)), + TYPE_QUAL_CONST)); + + /* Declare receiver type used for dispatching messages to 'super'. */ + + /* `struct objc_super *' */ + objc_super_type = build_pointer_type (xref_tag (RECORD_TYPE, + get_identifier (TAG_SUPER))); + + /* Declare pointers to method and ivar lists. */ + objc_method_list_ptr = build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier (UTAG_METHOD_LIST))); + objc_method_proto_list_ptr + = build_pointer_type (xref_tag (RECORD_TYPE, + get_identifier (UTAG_METHOD_PROTOTYPE_LIST))); + objc_ivar_list_ptr = build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier (UTAG_IVAR_LIST))); + + /* TREE_NOTHROW is cleared for the message-sending functions, + because the function that gets called can throw in Obj-C++, or + could itself call something that can throw even in Obj-C. */ + + if (flag_next_runtime) + { + /* NB: In order to call one of the ..._stret (struct-returning) + functions, the function *MUST* first be cast to a signature that + corresponds to the actual ObjC method being invoked. This is + what is done by the build_objc_method_call() routine below. */ + + /* id objc_msgSend (id, SEL, ...); */ + /* id objc_msgSendNonNil (id, SEL, ...); */ + /* id objc_msgSend_stret (id, SEL, ...); */ + /* id objc_msgSendNonNil_stret (id, SEL, ...); */ + type + = build_function_type (objc_object_type, + tree_cons (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, objc_selector_type, + NULL_TREE))); + umsg_decl = builtin_function (TAG_MSGSEND, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + umsg_nonnil_decl = builtin_function (TAG_MSGSEND_NONNIL, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + umsg_stret_decl = builtin_function (TAG_MSGSEND_STRET, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + umsg_nonnil_stret_decl = builtin_function (TAG_MSGSEND_NONNIL_STRET, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + + /* These can throw, because the function that gets called can throw + in Obj-C++, or could itself call something that can throw even + in Obj-C. */ + TREE_NOTHROW (umsg_decl) = 0; + TREE_NOTHROW (umsg_nonnil_decl) = 0; + TREE_NOTHROW (umsg_stret_decl) = 0; + TREE_NOTHROW (umsg_nonnil_stret_decl) = 0; + + /* id objc_msgSend_Fast (id, SEL, ...) + __attribute__ ((hard_coded_address (OFFS_MSGSEND_FAST))); */ +#ifdef OFFS_MSGSEND_FAST + umsg_fast_decl = builtin_function (TAG_MSGSEND_FAST, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + TREE_NOTHROW (umsg_fast_decl) = 0; + DECL_ATTRIBUTES (umsg_fast_decl) + = tree_cons (get_identifier ("hard_coded_address"), + build_int_cst (NULL_TREE, OFFS_MSGSEND_FAST), + NULL_TREE); +#else + /* No direct dispatch availible. */ + umsg_fast_decl = umsg_decl; +#endif + + /* id objc_msgSendSuper (struct objc_super *, SEL, ...); */ + /* id objc_msgSendSuper_stret (struct objc_super *, SEL, ...); */ + type + = build_function_type (objc_object_type, + tree_cons (NULL_TREE, objc_super_type, + tree_cons (NULL_TREE, objc_selector_type, + NULL_TREE))); + umsg_super_decl = builtin_function (TAG_MSGSENDSUPER, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + umsg_super_stret_decl = builtin_function (TAG_MSGSENDSUPER_STRET, + type, 0, NOT_BUILT_IN, 0, + NULL_TREE); + TREE_NOTHROW (umsg_super_decl) = 0; + TREE_NOTHROW (umsg_super_stret_decl) = 0; + } + else + { + /* GNU runtime messenger entry points. */ + + /* typedef id (*IMP)(id, SEL, ...); */ + tree IMP_type + = build_pointer_type + (build_function_type (objc_object_type, + tree_cons (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, objc_selector_type, + NULL_TREE)))); + + /* IMP objc_msg_lookup (id, SEL); */ + type + = build_function_type (IMP_type, + tree_cons (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, objc_selector_type, + OBJC_VOID_AT_END))); + umsg_decl = builtin_function (TAG_MSGSEND, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + TREE_NOTHROW (umsg_decl) = 0; + + /* IMP objc_msg_lookup_super (struct objc_super *, SEL); */ + type + = build_function_type (IMP_type, + tree_cons (NULL_TREE, objc_super_type, + tree_cons (NULL_TREE, objc_selector_type, + OBJC_VOID_AT_END))); + umsg_super_decl = builtin_function (TAG_MSGSENDSUPER, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + TREE_NOTHROW (umsg_super_decl) = 0; + + /* The following GNU runtime entry point is called to initialize + each module: + + __objc_exec_class (void *); */ + type + = build_function_type (void_type_node, + tree_cons (NULL_TREE, ptr_type_node, + OBJC_VOID_AT_END)); + execclass_decl = builtin_function (TAG_EXECCLASS, + type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + } + + /* id objc_getClass (const char *); */ + + type = build_function_type (objc_object_type, + tree_cons (NULL_TREE, + const_string_type_node, + OBJC_VOID_AT_END)); + + objc_get_class_decl + = builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); + + /* id objc_getMetaClass (const char *); */ + + objc_get_meta_class_decl + = builtin_function (TAG_GETMETACLASS, type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + + build_class_template (); + build_super_template (); + build_protocol_template (); + build_category_template (); + build_objc_exception_stuff (); + + if (flag_next_runtime) + build_next_objc_exception_stuff (); + + /* static SEL _OBJC_SELECTOR_TABLE[]; */ + + if (! flag_next_runtime) + build_selector_table_decl (); + + /* Forward declare constant_string_id and constant_string_type. */ + if (!constant_string_class_name) + constant_string_class_name = default_constant_string_class_name; + + constant_string_id = get_identifier (constant_string_class_name); + objc_declare_class (tree_cons (NULL_TREE, constant_string_id, NULL_TREE)); + + /* Pre-build the following entities - for speed/convenience. */ + self_id = get_identifier ("self"); + ucmd_id = get_identifier ("_cmd"); + +#ifdef OBJCPLUS + pop_lang_context (); +#endif + + write_symbols = save_write_symbols; + debug_hooks = save_hooks; +} + +/* Ensure that the ivar list for NSConstantString/NXConstantString + (or whatever was specified via `-fconstant-string-class') + contains fields at least as large as the following three, so that + the runtime can stomp on them with confidence: + + struct STRING_OBJECT_CLASS_NAME + { + Object isa; + char *cString; + unsigned int length; + }; */ + +static int +check_string_class_template (void) +{ + tree field_decl = objc_get_class_ivars (constant_string_id); + +#define AT_LEAST_AS_LARGE_AS(F, T) \ + (F && TREE_CODE (F) == FIELD_DECL \ + && (TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (F))) \ + >= TREE_INT_CST_LOW (TYPE_SIZE (T)))) + + if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node)) + return 0; + + field_decl = TREE_CHAIN (field_decl); + if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node)) + return 0; + + field_decl = TREE_CHAIN (field_decl); + return AT_LEAST_AS_LARGE_AS (field_decl, unsigned_type_node); + +#undef AT_LEAST_AS_LARGE_AS +} + +/* Avoid calling `check_string_class_template ()' more than once. */ +static GTY(()) int string_layout_checked; + +/* Construct an internal string layout to be used as a template for + creating NSConstantString/NXConstantString instances. */ + +static tree +objc_build_internal_const_str_type (void) +{ + tree type = (*lang_hooks.types.make_type) (RECORD_TYPE); + tree fields = build_decl (FIELD_DECL, NULL_TREE, ptr_type_node); + tree field = build_decl (FIELD_DECL, NULL_TREE, ptr_type_node); + + TREE_CHAIN (field) = fields; fields = field; + field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node); + TREE_CHAIN (field) = fields; fields = field; + /* NB: The finish_builtin_struct() routine expects FIELD_DECLs in + reverse order! */ + finish_builtin_struct (type, "__builtin_ObjCString", + fields, NULL_TREE); + + return type; +} + +/* Custom build_string which sets TREE_TYPE! */ + +static tree +my_build_string (int len, const char *str) +{ + return fix_string_type (build_string (len, str)); +} + +/* Build a string with contents STR and length LEN and convert it to a + pointer. */ + +static tree +my_build_string_pointer (int len, const char *str) +{ + tree string = my_build_string (len, str); + tree ptrtype = build_pointer_type (TREE_TYPE (TREE_TYPE (string))); + return build1 (ADDR_EXPR, ptrtype, string); +} + +static hashval_t +string_hash (const void *ptr) +{ + tree str = ((struct string_descriptor *)ptr)->literal; + const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); + int i, len = TREE_STRING_LENGTH (str); + hashval_t h = len; + + for (i = 0; i < len; i++) + h = ((h * 613) + p[i]); + + return h; +} + +static int +string_eq (const void *ptr1, const void *ptr2) +{ + tree str1 = ((struct string_descriptor *)ptr1)->literal; + tree str2 = ((struct string_descriptor *)ptr2)->literal; + int len1 = TREE_STRING_LENGTH (str1); + + return (len1 == TREE_STRING_LENGTH (str2) + && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), + len1)); +} + +/* Given a chain of STRING_CST's, build a static instance of + NXConstantString which points at the concatenation of those + strings. We place the string object in the __string_objects + section of the __OBJC segment. The Objective-C runtime will + initialize the isa pointers of the string objects to point at the + NXConstantString class object. */ + +tree +objc_build_string_object (tree string) +{ + tree initlist, constructor, constant_string_class; + int length; + tree fields, addr; + struct string_descriptor *desc, key; + void **loc; + + /* Prep the string argument. */ + string = fix_string_type (string); + TREE_SET_CODE (string, STRING_CST); + length = TREE_STRING_LENGTH (string) - 1; + + /* Check whether the string class being used actually exists and has the + correct ivar layout. */ + if (!string_layout_checked) + { + string_layout_checked = -1; + constant_string_class = lookup_interface (constant_string_id); + internal_const_str_type = objc_build_internal_const_str_type (); + + if (!constant_string_class + || !(constant_string_type + = CLASS_STATIC_TEMPLATE (constant_string_class))) + error ("cannot find interface declaration for %qs", + IDENTIFIER_POINTER (constant_string_id)); + /* The NSConstantString/NXConstantString ivar layout is now known. */ + else if (!check_string_class_template ()) + error ("interface %qs does not have valid constant string layout", + IDENTIFIER_POINTER (constant_string_id)); + /* For the NeXT runtime, we can generate a literal reference + to the string class, don't need to run a constructor. */ + else if (flag_next_runtime && !setup_string_decl ()) + error ("cannot find reference tag for class %qs", + IDENTIFIER_POINTER (constant_string_id)); + else + { + string_layout_checked = 1; /* Success! */ + add_class_reference (constant_string_id); + } + } + + if (string_layout_checked == -1) + return error_mark_node; + + /* Perhaps we already constructed a constant string just like this one? */ + key.literal = string; + loc = htab_find_slot (string_htab, &key, INSERT); + desc = *loc; + + if (!desc) + { + tree var; + *loc = desc = ggc_alloc (sizeof (*desc)); + desc->literal = string; + + /* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */ + /* NeXT: (NSConstantString *) & ((__builtin_ObjCString) { isa, string, length }) */ + fields = TYPE_FIELDS (internal_const_str_type); + initlist + = build_tree_list (fields, + flag_next_runtime + ? build_unary_op (ADDR_EXPR, string_class_decl, 0) + : build_int_cst (NULL_TREE, 0)); + fields = TREE_CHAIN (fields); + initlist = tree_cons (fields, build_unary_op (ADDR_EXPR, string, 1), + initlist); + fields = TREE_CHAIN (fields); + initlist = tree_cons (fields, build_int_cst (NULL_TREE, length), + initlist); + constructor = objc_build_constructor (internal_const_str_type, + nreverse (initlist)); + TREE_INVARIANT (constructor) = true; + + if (!flag_next_runtime) + constructor + = objc_add_static_instance (constructor, constant_string_type); + else + { + var = build_decl (CONST_DECL, NULL, TREE_TYPE (constructor)); + DECL_INITIAL (var) = constructor; + TREE_STATIC (var) = 1; + pushdecl_top_level (var); + constructor = var; + } + desc->constructor = constructor; + } + + addr = convert (build_pointer_type (constant_string_type), + build_unary_op (ADDR_EXPR, desc->constructor, 1)); + + return addr; +} + +/* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */ + +static GTY(()) int num_static_inst; + +static tree +objc_add_static_instance (tree constructor, tree class_decl) +{ + tree *chain, decl; + char buf[256]; + + /* Find the list of static instances for the CLASS_DECL. Create one if + not found. */ + for (chain = &objc_static_instances; + *chain && TREE_VALUE (*chain) != class_decl; + chain = &TREE_CHAIN (*chain)); + if (!*chain) + { + *chain = tree_cons (NULL_TREE, class_decl, NULL_TREE); + add_objc_string (OBJC_TYPE_NAME (class_decl), class_names); + } + + sprintf (buf, "_OBJC_INSTANCE_%d", num_static_inst++); + decl = build_decl (VAR_DECL, get_identifier (buf), class_decl); + DECL_COMMON (decl) = 1; + TREE_STATIC (decl) = 1; + DECL_ARTIFICIAL (decl) = 1; + TREE_USED (decl) = 1; + DECL_INITIAL (decl) = constructor; + + /* We may be writing something else just now. + Postpone till end of input. */ + DECL_DEFER_OUTPUT (decl) = 1; + pushdecl_top_level (decl); + rest_of_decl_compilation (decl, 1, 0); + + /* Add the DECL to the head of this CLASS' list. */ + TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain)); + + return decl; +} + +/* Build a static constant CONSTRUCTOR + with type TYPE and elements ELTS. */ + +static tree +objc_build_constructor (tree type, tree elts) +{ + tree constructor = build_constructor_from_list (type, elts); + + TREE_CONSTANT (constructor) = 1; + TREE_STATIC (constructor) = 1; + TREE_READONLY (constructor) = 1; + +#ifdef OBJCPLUS + /* Adjust for impedance mismatch. We should figure out how to build + CONSTRUCTORs that consistently please both the C and C++ gods. */ + if (!TREE_PURPOSE (elts)) + TREE_TYPE (constructor) = NULL_TREE; + TREE_HAS_CONSTRUCTOR (constructor) = 1; +#endif + + return constructor; +} + +/* Take care of defining and initializing _OBJC_SYMBOLS. */ + +/* Predefine the following data type: + + struct _objc_symtab + { + long sel_ref_cnt; + SEL *refs; + short cls_def_cnt; + short cat_def_cnt; + void *defs[cls_def_cnt + cat_def_cnt]; + }; */ + +static void +build_objc_symtab_template (void) +{ + tree field_decl, field_decl_chain; + + objc_symtab_template + = start_struct (RECORD_TYPE, get_identifier (UTAG_SYMTAB)); + + /* long sel_ref_cnt; */ + field_decl = create_field_decl (long_integer_type_node, "sel_ref_cnt"); + field_decl_chain = field_decl; + + /* SEL *refs; */ + field_decl = create_field_decl (build_pointer_type (objc_selector_type), + "refs"); + chainon (field_decl_chain, field_decl); + + /* short cls_def_cnt; */ + field_decl = create_field_decl (short_integer_type_node, "cls_def_cnt"); + chainon (field_decl_chain, field_decl); + + /* short cat_def_cnt; */ + field_decl = create_field_decl (short_integer_type_node, + "cat_def_cnt"); + chainon (field_decl_chain, field_decl); + + if (imp_count || cat_count || !flag_next_runtime) + { + /* void *defs[imp_count + cat_count (+ 1)]; */ + /* NB: The index is one less than the size of the array. */ + int index = imp_count + cat_count + + (flag_next_runtime? -1: 0); + field_decl = create_field_decl + (build_array_type + (ptr_type_node, + build_index_type (build_int_cst (NULL_TREE, index))), + "defs"); + chainon (field_decl_chain, field_decl); + } + + finish_struct (objc_symtab_template, field_decl_chain, NULL_TREE); +} + +/* Create the initial value for the `defs' field of _objc_symtab. + This is a CONSTRUCTOR. */ + +static tree +init_def_list (tree type) +{ + tree expr, initlist = NULL_TREE; + struct imp_entry *impent; + + if (imp_count) + for (impent = imp_list; impent; impent = impent->next) + { + if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) + { + expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + } + + if (cat_count) + for (impent = imp_list; impent; impent = impent->next) + { + if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE) + { + expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + } + + if (!flag_next_runtime) + { + /* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */ + tree expr; + + if (static_instances_decl) + expr = build_unary_op (ADDR_EXPR, static_instances_decl, 0); + else + expr = build_int_cst (NULL_TREE, 0); + + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + return objc_build_constructor (type, nreverse (initlist)); +} + +/* Construct the initial value for all of _objc_symtab. */ + +static tree +init_objc_symtab (tree type) +{ + tree initlist; + + /* sel_ref_cnt = { ..., 5, ... } */ + + initlist = build_tree_list (NULL_TREE, + build_int_cst (long_integer_type_node, 0)); + + /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */ + + if (flag_next_runtime || ! sel_ref_chain) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + initlist + = tree_cons (NULL_TREE, + convert (build_pointer_type (objc_selector_type), + build_unary_op (ADDR_EXPR, + UOBJC_SELECTOR_TABLE_decl, 1)), + initlist); + + /* cls_def_cnt = { ..., 5, ... } */ + + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, imp_count), initlist); + + /* cat_def_cnt = { ..., 5, ... } */ + + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, cat_count), initlist); + + /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */ + + if (imp_count || cat_count || !flag_next_runtime) + { + + tree field = TYPE_FIELDS (type); + field = TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (field)))); + + initlist = tree_cons (NULL_TREE, init_def_list (TREE_TYPE (field)), + initlist); + } + + return objc_build_constructor (type, nreverse (initlist)); +} + +/* Generate forward declarations for metadata such as + 'OBJC_CLASS_...'. */ + +static tree +build_metadata_decl (const char *name, tree type) +{ + tree decl; + + /* struct TYPE NAME_<name>; */ + decl = start_var_decl (type, synth_id_with_class_suffix + (name, + objc_implementation_context)); + + return decl; +} + +/* Push forward-declarations of all the categories so that + init_def_list can use them in a CONSTRUCTOR. */ + +static void +forward_declare_categories (void) +{ + struct imp_entry *impent; + tree sav = objc_implementation_context; + + for (impent = imp_list; impent; impent = impent->next) + { + if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE) + { + /* Set an invisible arg to synth_id_with_class_suffix. */ + objc_implementation_context = impent->imp_context; + /* extern struct objc_category _OBJC_CATEGORY_<name>; */ + impent->class_decl = build_metadata_decl ("_OBJC_CATEGORY", + objc_category_template); + } + } + objc_implementation_context = sav; +} + +/* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab' + and initialized appropriately. */ + +static void +generate_objc_symtab_decl (void) +{ + /* forward declare categories */ + if (cat_count) + forward_declare_categories (); + + build_objc_symtab_template (); + UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS"); + finish_var_decl (UOBJC_SYMBOLS_decl, + init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl))); +} + +static tree +init_module_descriptor (tree type) +{ + tree initlist, expr; + + /* version = { 1, ... } */ + + expr = build_int_cst (long_integer_type_node, OBJC_VERSION); + initlist = build_tree_list (NULL_TREE, expr); + + /* size = { ..., sizeof (struct _objc_module), ... } */ + + expr = convert (long_integer_type_node, + size_in_bytes (objc_module_template)); + initlist = tree_cons (NULL_TREE, expr, initlist); + + /* Don't provide any file name for security reasons. */ + /* name = { ..., "", ... } */ + + expr = add_objc_string (get_identifier (""), class_names); + initlist = tree_cons (NULL_TREE, expr, initlist); + + /* symtab = { ..., _OBJC_SYMBOLS, ... } */ + + if (UOBJC_SYMBOLS_decl) + expr = build_unary_op (ADDR_EXPR, UOBJC_SYMBOLS_decl, 0); + else + expr = build_int_cst (NULL_TREE, 0); + initlist = tree_cons (NULL_TREE, expr, initlist); + + return objc_build_constructor (type, nreverse (initlist)); +} + +/* Write out the data structures to describe Objective C classes defined. + + struct _objc_module { ... } _OBJC_MODULE = { ... }; */ + +static void +build_module_descriptor (void) +{ + tree field_decl, field_decl_chain; + +#ifdef OBJCPLUS + push_lang_context (lang_name_c); /* extern "C" */ +#endif + + objc_module_template + = start_struct (RECORD_TYPE, get_identifier (UTAG_MODULE)); + + /* long version; */ + field_decl = create_field_decl (long_integer_type_node, "version"); + field_decl_chain = field_decl; + + /* long size; */ + field_decl = create_field_decl (long_integer_type_node, "size"); + chainon (field_decl_chain, field_decl); + + /* char *name; */ + field_decl = create_field_decl (string_type_node, "name"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_symtab *symtab; */ + field_decl + = create_field_decl (build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier (UTAG_SYMTAB))), + "symtab"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_module_template, field_decl_chain, NULL_TREE); + + /* Create an instance of "_objc_module". */ + UOBJC_MODULES_decl = start_var_decl (objc_module_template, "_OBJC_MODULES"); + finish_var_decl (UOBJC_MODULES_decl, + init_module_descriptor (TREE_TYPE (UOBJC_MODULES_decl))); + +#ifdef OBJCPLUS + pop_lang_context (); +#endif +} + +/* The GNU runtime requires us to provide a static initializer function + for each module: + + static void __objc_gnu_init (void) { + __objc_exec_class (&L_OBJC_MODULES); + } */ + +static void +build_module_initializer_routine (void) +{ + tree body; + +#ifdef OBJCPLUS + push_lang_context (lang_name_c); /* extern "C" */ +#endif + + objc_push_parm (build_decl (PARM_DECL, NULL_TREE, void_type_node)); + objc_start_function (get_identifier (TAG_GNUINIT), + build_function_type (void_type_node, + OBJC_VOID_AT_END), + NULL_TREE, objc_get_parm_info (0)); + + body = c_begin_compound_stmt (true); + add_stmt (build_function_call + (execclass_decl, + build_tree_list + (NULL_TREE, + build_unary_op (ADDR_EXPR, + UOBJC_MODULES_decl, 0)))); + add_stmt (c_end_compound_stmt (body, true)); + + TREE_PUBLIC (current_function_decl) = 0; + +#ifndef OBJCPLUS + /* For Objective-C++, we will need to call __objc_gnu_init + from objc_generate_static_init_call() below. */ + DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1; +#endif + + GNU_INIT_decl = current_function_decl; + finish_function (); + +#ifdef OBJCPLUS + pop_lang_context (); +#endif +} + +#ifdef OBJCPLUS +/* Return 1 if the __objc_gnu_init function has been synthesized and needs + to be called by the module initializer routine. */ + +int +objc_static_init_needed_p (void) +{ + return (GNU_INIT_decl != NULL_TREE); +} + +/* Generate a call to the __objc_gnu_init initializer function. */ + +tree +objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED) +{ + add_stmt (build_stmt (EXPR_STMT, + build_function_call (GNU_INIT_decl, NULL_TREE))); + + return ctors; +} +#endif /* OBJCPLUS */ + +/* Return the DECL of the string IDENT in the SECTION. */ + +static tree +get_objc_string_decl (tree ident, enum string_section section) +{ + tree chain; + + if (section == class_names) + chain = class_names_chain; + else if (section == meth_var_names) + chain = meth_var_names_chain; + else if (section == meth_var_types) + chain = meth_var_types_chain; + else + abort (); + + for (; chain != 0; chain = TREE_CHAIN (chain)) + if (TREE_VALUE (chain) == ident) + return (TREE_PURPOSE (chain)); + + abort (); + return NULL_TREE; +} + +/* Output references to all statically allocated objects. Return the DECL + for the array built. */ + +static void +generate_static_references (void) +{ + tree decls = NULL_TREE, expr = NULL_TREE; + tree class_name, class, decl, initlist; + tree cl_chain, in_chain, type + = build_array_type (build_pointer_type (void_type_node), NULL_TREE); + int num_inst, num_class; + char buf[256]; + + if (flag_next_runtime) + abort (); + + for (cl_chain = objc_static_instances, num_class = 0; + cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++) + { + for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain); + in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain)); + + sprintf (buf, "_OBJC_STATIC_INSTANCES_%d", num_class); + decl = start_var_decl (type, buf); + + /* Output {class_name, ...}. */ + class = TREE_VALUE (cl_chain); + class_name = get_objc_string_decl (OBJC_TYPE_NAME (class), class_names); + initlist = build_tree_list (NULL_TREE, + build_unary_op (ADDR_EXPR, class_name, 1)); + + /* Output {..., instance, ...}. */ + for (in_chain = TREE_PURPOSE (cl_chain); + in_chain; in_chain = TREE_CHAIN (in_chain)) + { + expr = build_unary_op (ADDR_EXPR, TREE_VALUE (in_chain), 1); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + /* Output {..., NULL}. */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + + expr = objc_build_constructor (TREE_TYPE (decl), nreverse (initlist)); + finish_var_decl (decl, expr); + decls + = tree_cons (NULL_TREE, build_unary_op (ADDR_EXPR, decl, 1), decls); + } + + decls = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), decls); + expr = objc_build_constructor (type, nreverse (decls)); + static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES"); + finish_var_decl (static_instances_decl, expr); +} + +static GTY(()) int selector_reference_idx; + +static tree +build_selector_reference_decl (void) +{ + tree decl; + char buf[256]; + + sprintf (buf, "_OBJC_SELECTOR_REFERENCES_%d", selector_reference_idx++); + decl = start_var_decl (objc_selector_type, buf); + + return decl; +} + +static void +build_selector_table_decl (void) +{ + tree temp; + + if (flag_typed_selectors) + { + build_selector_template (); + temp = build_array_type (objc_selector_template, NULL_TREE); + } + else + temp = build_array_type (objc_selector_type, NULL_TREE); + + UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE"); +} + +/* Just a handy wrapper for add_objc_string. */ + +static tree +build_selector (tree ident) +{ + return convert (objc_selector_type, + add_objc_string (ident, meth_var_names)); +} + +static void +build_selector_translation_table (void) +{ + tree chain, initlist = NULL_TREE; + int offset = 0; + tree decl = NULL_TREE; + + for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain)) + { + tree expr; + + if (warn_selector && objc_implementation_context) + { + tree method_chain; + bool found = false; + for (method_chain = meth_var_names_chain; + method_chain; + method_chain = TREE_CHAIN (method_chain)) + { + if (TREE_VALUE (method_chain) == TREE_VALUE (chain)) + { + found = true; + break; + } + } + if (!found) + { + location_t *loc; + if (flag_next_runtime && TREE_PURPOSE (chain)) + loc = &DECL_SOURCE_LOCATION (TREE_PURPOSE (chain)); + else + loc = &input_location; + warning (0, "%Hcreating selector for nonexistent method %qE", + loc, TREE_VALUE (chain)); + } + } + + expr = build_selector (TREE_VALUE (chain)); + /* add one for the '\0' character */ + offset += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1; + + if (flag_next_runtime) + { + decl = TREE_PURPOSE (chain); + finish_var_decl (decl, expr); + } + else + { + if (flag_typed_selectors) + { + tree eltlist = NULL_TREE; + tree encoding = get_proto_encoding (TREE_PURPOSE (chain)); + eltlist = tree_cons (NULL_TREE, expr, NULL_TREE); + eltlist = tree_cons (NULL_TREE, encoding, eltlist); + expr = objc_build_constructor (objc_selector_template, + nreverse (eltlist)); + } + + initlist = tree_cons (NULL_TREE, expr, initlist); + } + } + + if (! flag_next_runtime) + { + /* Cause the selector table (previously forward-declared) + to be actually output. */ + initlist = tree_cons (NULL_TREE, + flag_typed_selectors + ? objc_build_constructor + (objc_selector_template, + tree_cons (NULL_TREE, + build_int_cst (NULL_TREE, 0), + tree_cons (NULL_TREE, + build_int_cst (NULL_TREE, 0), + NULL_TREE))) + : build_int_cst (NULL_TREE, 0), initlist); + initlist = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl), + nreverse (initlist)); + finish_var_decl (UOBJC_SELECTOR_TABLE_decl, initlist); + } +} + +static tree +get_proto_encoding (tree proto) +{ + tree encoding; + if (proto) + { + if (! METHOD_ENCODING (proto)) + { + encoding = encode_method_prototype (proto); + METHOD_ENCODING (proto) = encoding; + } + else + encoding = METHOD_ENCODING (proto); + + return add_objc_string (encoding, meth_var_types); + } + else + return build_int_cst (NULL_TREE, 0); +} + +/* sel_ref_chain is a list whose "value" fields will be instances of + identifier_node that represent the selector. */ + +static tree +build_typed_selector_reference (tree ident, tree prototype) +{ + tree *chain = &sel_ref_chain; + tree expr; + int index = 0; + + while (*chain) + { + if (TREE_PURPOSE (*chain) == prototype && TREE_VALUE (*chain) == ident) + goto return_at_index; + + index++; + chain = &TREE_CHAIN (*chain); + } + + *chain = tree_cons (prototype, ident, NULL_TREE); + + return_at_index: + expr = build_unary_op (ADDR_EXPR, + build_array_ref (UOBJC_SELECTOR_TABLE_decl, + build_int_cst (NULL_TREE, index)), + 1); + return convert (objc_selector_type, expr); +} + +static tree +build_selector_reference (tree ident) +{ + tree *chain = &sel_ref_chain; + tree expr; + int index = 0; + + while (*chain) + { + if (TREE_VALUE (*chain) == ident) + return (flag_next_runtime + ? TREE_PURPOSE (*chain) + : build_array_ref (UOBJC_SELECTOR_TABLE_decl, + build_int_cst (NULL_TREE, index))); + + index++; + chain = &TREE_CHAIN (*chain); + } + + expr = (flag_next_runtime ? build_selector_reference_decl (): NULL_TREE); + + *chain = tree_cons (expr, ident, NULL_TREE); + + return (flag_next_runtime + ? expr + : build_array_ref (UOBJC_SELECTOR_TABLE_decl, + build_int_cst (NULL_TREE, index))); +} + +static GTY(()) int class_reference_idx; + +static tree +build_class_reference_decl (void) +{ + tree decl; + char buf[256]; + + sprintf (buf, "_OBJC_CLASS_REFERENCES_%d", class_reference_idx++); + decl = start_var_decl (objc_class_type, buf); + + return decl; +} + +/* Create a class reference, but don't create a variable to reference + it. */ + +static void +add_class_reference (tree ident) +{ + tree chain; + + if ((chain = cls_ref_chain)) + { + tree tail; + do + { + if (ident == TREE_VALUE (chain)) + return; + + tail = chain; + chain = TREE_CHAIN (chain); + } + while (chain); + + /* Append to the end of the list */ + TREE_CHAIN (tail) = tree_cons (NULL_TREE, ident, NULL_TREE); + } + else + cls_ref_chain = tree_cons (NULL_TREE, ident, NULL_TREE); +} + +/* Get a class reference, creating it if necessary. Also create the + reference variable. */ + +tree +objc_get_class_reference (tree ident) +{ + tree orig_ident = (DECL_P (ident) + ? DECL_NAME (ident) + : TYPE_P (ident) + ? OBJC_TYPE_NAME (ident) + : ident); + bool local_scope = false; + +#ifdef OBJCPLUS + if (processing_template_decl) + /* Must wait until template instantiation time. */ + return build_min_nt (CLASS_REFERENCE_EXPR, ident); +#endif + + if (TREE_CODE (ident) == TYPE_DECL) + ident = (DECL_ORIGINAL_TYPE (ident) + ? DECL_ORIGINAL_TYPE (ident) + : TREE_TYPE (ident)); + +#ifdef OBJCPLUS + if (TYPE_P (ident) && TYPE_CONTEXT (ident) + && TYPE_CONTEXT (ident) != global_namespace) + local_scope = true; +#endif + + if (local_scope || !(ident = objc_is_class_name (ident))) + { + error ("%qs is not an Objective-C class name or alias", + IDENTIFIER_POINTER (orig_ident)); + return error_mark_node; + } + + if (flag_next_runtime && !flag_zero_link) + { + tree *chain; + tree decl; + + for (chain = &cls_ref_chain; *chain; chain = &TREE_CHAIN (*chain)) + if (TREE_VALUE (*chain) == ident) + { + if (! TREE_PURPOSE (*chain)) + TREE_PURPOSE (*chain) = build_class_reference_decl (); + + return TREE_PURPOSE (*chain); + } + + decl = build_class_reference_decl (); + *chain = tree_cons (decl, ident, NULL_TREE); + return decl; + } + else + { + tree params; + + add_class_reference (ident); + + params = build_tree_list (NULL_TREE, + my_build_string_pointer + (IDENTIFIER_LENGTH (ident) + 1, + IDENTIFIER_POINTER (ident))); + + assemble_external (objc_get_class_decl); + return build_function_call (objc_get_class_decl, params); + } +} + +/* For each string section we have a chain which maps identifier nodes + to decls for the strings. */ + +static tree +add_objc_string (tree ident, enum string_section section) +{ + tree *chain, decl, type, string_expr; + + if (section == class_names) + chain = &class_names_chain; + else if (section == meth_var_names) + chain = &meth_var_names_chain; + else if (section == meth_var_types) + chain = &meth_var_types_chain; + else + abort (); + + while (*chain) + { + if (TREE_VALUE (*chain) == ident) + return convert (string_type_node, + build_unary_op (ADDR_EXPR, TREE_PURPOSE (*chain), 1)); + + chain = &TREE_CHAIN (*chain); + } + + decl = build_objc_string_decl (section); + + type = build_array_type + (char_type_node, + build_index_type + (build_int_cst (NULL_TREE, + IDENTIFIER_LENGTH (ident)))); + decl = start_var_decl (type, IDENTIFIER_POINTER (DECL_NAME (decl))); + string_expr = my_build_string (IDENTIFIER_LENGTH (ident) + 1, + IDENTIFIER_POINTER (ident)); + finish_var_decl (decl, string_expr); + + *chain = tree_cons (decl, ident, NULL_TREE); + + return convert (string_type_node, build_unary_op (ADDR_EXPR, decl, 1)); +} + +static GTY(()) int class_names_idx; +static GTY(()) int meth_var_names_idx; +static GTY(()) int meth_var_types_idx; + +static tree +build_objc_string_decl (enum string_section section) +{ + tree decl, ident; + char buf[256]; + + if (section == class_names) + sprintf (buf, "_OBJC_CLASS_NAME_%d", class_names_idx++); + else if (section == meth_var_names) + sprintf (buf, "_OBJC_METH_VAR_NAME_%d", meth_var_names_idx++); + else if (section == meth_var_types) + sprintf (buf, "_OBJC_METH_VAR_TYPE_%d", meth_var_types_idx++); + + ident = get_identifier (buf); + + decl = build_decl (VAR_DECL, ident, build_array_type (char_type_node, 0)); + DECL_EXTERNAL (decl) = 1; + TREE_PUBLIC (decl) = 0; + TREE_USED (decl) = 1; + TREE_CONSTANT (decl) = 1; + DECL_CONTEXT (decl) = 0; + DECL_ARTIFICIAL (decl) = 1; +#ifdef OBJCPLUS + DECL_THIS_STATIC (decl) = 1; /* squash redeclaration errors */ +#endif + + make_decl_rtl (decl); + pushdecl_top_level (decl); + + return decl; +} + + +void +objc_declare_alias (tree alias_ident, tree class_ident) +{ + tree underlying_class; + +#ifdef OBJCPLUS + if (current_namespace != global_namespace) { + error ("Objective-C declarations may only appear in global scope"); + } +#endif /* OBJCPLUS */ + + if (!(underlying_class = objc_is_class_name (class_ident))) + warning (0, "cannot find class %qs", IDENTIFIER_POINTER (class_ident)); + else if (objc_is_class_name (alias_ident)) + warning (0, "class %qs already exists", IDENTIFIER_POINTER (alias_ident)); + else + { + /* Implement @compatibility_alias as a typedef. */ +#ifdef OBJCPLUS + push_lang_context (lang_name_c); /* extern "C" */ +#endif + lang_hooks.decls.pushdecl (build_decl + (TYPE_DECL, + alias_ident, + xref_tag (RECORD_TYPE, underlying_class))); +#ifdef OBJCPLUS + pop_lang_context (); +#endif + alias_chain = tree_cons (underlying_class, alias_ident, alias_chain); + } +} + +void +objc_declare_class (tree ident_list) +{ + tree list; +#ifdef OBJCPLUS + if (current_namespace != global_namespace) { + error ("Objective-C declarations may only appear in global scope"); + } +#endif /* OBJCPLUS */ + + for (list = ident_list; list; list = TREE_CHAIN (list)) + { + tree ident = TREE_VALUE (list); + + if (! objc_is_class_name (ident)) + { + tree record = lookup_name (ident), type = record; + + if (record) + { + if (TREE_CODE (record) == TYPE_DECL) + type = DECL_ORIGINAL_TYPE (record); + + if (!TYPE_HAS_OBJC_INFO (type) + || !TYPE_OBJC_INTERFACE (type)) + { + error ("%qs redeclared as different kind of symbol", + IDENTIFIER_POINTER (ident)); + error ("previous declaration of %q+D", + record); + } + } + + record = xref_tag (RECORD_TYPE, ident); + INIT_TYPE_OBJC_INFO (record); + TYPE_OBJC_INTERFACE (record) = ident; + class_chain = tree_cons (NULL_TREE, ident, class_chain); + } + } +} + +tree +objc_is_class_name (tree ident) +{ + tree chain; + + if (ident && TREE_CODE (ident) == IDENTIFIER_NODE + && identifier_global_value (ident)) + ident = identifier_global_value (ident); + while (ident && TREE_CODE (ident) == TYPE_DECL && DECL_ORIGINAL_TYPE (ident)) + ident = OBJC_TYPE_NAME (DECL_ORIGINAL_TYPE (ident)); + + if (ident && TREE_CODE (ident) == RECORD_TYPE) + ident = OBJC_TYPE_NAME (ident); +#ifdef OBJCPLUS + if (ident && TREE_CODE (ident) == TYPE_DECL) + ident = DECL_NAME (ident); +#endif + if (!ident || TREE_CODE (ident) != IDENTIFIER_NODE) + return NULL_TREE; + + if (lookup_interface (ident)) + return ident; + + for (chain = class_chain; chain; chain = TREE_CHAIN (chain)) + { + if (ident == TREE_VALUE (chain)) + return ident; + } + + for (chain = alias_chain; chain; chain = TREE_CHAIN (chain)) + { + if (ident == TREE_VALUE (chain)) + return TREE_PURPOSE (chain); + } + + return 0; +} + +/* Check whether TYPE is either 'id' or 'Class'. */ + +tree +objc_is_id (tree type) +{ + if (type && TREE_CODE (type) == IDENTIFIER_NODE + && identifier_global_value (type)) + type = identifier_global_value (type); + + if (type && TREE_CODE (type) == TYPE_DECL) + type = TREE_TYPE (type); + + /* NB: This function may be called before the ObjC front-end has + been initialized, in which case OBJC_OBJECT_TYPE will (still) be NULL. */ + return (objc_object_type && type + && (IS_ID (type) || IS_CLASS (type) || IS_SUPER (type)) + ? type + : NULL_TREE); +} + +/* Check whether TYPE is either 'id', 'Class', or a pointer to an ObjC + class instance. This is needed by other parts of the compiler to + handle ObjC types gracefully. */ + +tree +objc_is_object_ptr (tree type) +{ + tree ret; + + type = TYPE_MAIN_VARIANT (type); + if (!POINTER_TYPE_P (type)) + return 0; + + ret = objc_is_id (type); + if (!ret) + ret = objc_is_class_name (TREE_TYPE (type)); + + return ret; +} + +static int +objc_is_gcable_type (tree type, int or_strong_p) +{ + tree name; + + if (!TYPE_P (type)) + return 0; + if (objc_is_id (TYPE_MAIN_VARIANT (type))) + return 1; + if (or_strong_p && lookup_attribute ("objc_gc", TYPE_ATTRIBUTES (type))) + return 1; + if (TREE_CODE (type) != POINTER_TYPE && TREE_CODE (type) != INDIRECT_REF) + return 0; + type = TREE_TYPE (type); + if (TREE_CODE (type) != RECORD_TYPE) + return 0; + name = TYPE_NAME (type); + return (objc_is_class_name (name) != NULL_TREE); +} + +static tree +objc_substitute_decl (tree expr, tree oldexpr, tree newexpr) +{ + if (expr == oldexpr) + return newexpr; + + switch (TREE_CODE (expr)) + { + case COMPONENT_REF: + return objc_build_component_ref + (objc_substitute_decl (TREE_OPERAND (expr, 0), + oldexpr, + newexpr), + DECL_NAME (TREE_OPERAND (expr, 1))); + case ARRAY_REF: + return build_array_ref (objc_substitute_decl (TREE_OPERAND (expr, 0), + oldexpr, + newexpr), + TREE_OPERAND (expr, 1)); + case INDIRECT_REF: + return build_indirect_ref (objc_substitute_decl (TREE_OPERAND (expr, 0), + oldexpr, + newexpr), "->"); + default: + return expr; + } +} + +static tree +objc_build_ivar_assignment (tree outervar, tree lhs, tree rhs) +{ + tree func_params; + /* The LHS parameter contains the expression 'outervar->memberspec'; + we need to transform it into '&((typeof(outervar) *) 0)->memberspec', + where memberspec may be arbitrarily complex (e.g., 'g->f.d[2].g[3]'). + */ + tree offs + = objc_substitute_decl + (lhs, outervar, convert (TREE_TYPE (outervar), integer_zero_node)); + tree func + = (flag_objc_direct_dispatch + ? objc_assign_ivar_fast_decl + : objc_assign_ivar_decl); + + offs = convert (integer_type_node, build_unary_op (ADDR_EXPR, offs, 0)); + offs = fold (offs); + func_params = tree_cons (NULL_TREE, + convert (objc_object_type, rhs), + tree_cons (NULL_TREE, convert (objc_object_type, outervar), + tree_cons (NULL_TREE, offs, + NULL_TREE))); + + assemble_external (func); + return build_function_call (func, func_params); +} + +static tree +objc_build_global_assignment (tree lhs, tree rhs) +{ + tree func_params = tree_cons (NULL_TREE, + convert (objc_object_type, rhs), + tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type), + build_unary_op (ADDR_EXPR, lhs, 0)), + NULL_TREE)); + + assemble_external (objc_assign_global_decl); + return build_function_call (objc_assign_global_decl, func_params); +} + +static tree +objc_build_strong_cast_assignment (tree lhs, tree rhs) +{ + tree func_params = tree_cons (NULL_TREE, + convert (objc_object_type, rhs), + tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type), + build_unary_op (ADDR_EXPR, lhs, 0)), + NULL_TREE)); + + assemble_external (objc_assign_strong_cast_decl); + return build_function_call (objc_assign_strong_cast_decl, func_params); +} + +static int +objc_is_gcable_p (tree expr) +{ + return (TREE_CODE (expr) == COMPONENT_REF + ? objc_is_gcable_p (TREE_OPERAND (expr, 1)) + : TREE_CODE (expr) == ARRAY_REF + ? (objc_is_gcable_p (TREE_TYPE (expr)) + || objc_is_gcable_p (TREE_OPERAND (expr, 0))) + : TREE_CODE (expr) == ARRAY_TYPE + ? objc_is_gcable_p (TREE_TYPE (expr)) + : TYPE_P (expr) + ? objc_is_gcable_type (expr, 1) + : (objc_is_gcable_p (TREE_TYPE (expr)) + || (DECL_P (expr) + && lookup_attribute ("objc_gc", DECL_ATTRIBUTES (expr))))); +} + +static int +objc_is_ivar_reference_p (tree expr) +{ + return (TREE_CODE (expr) == ARRAY_REF + ? objc_is_ivar_reference_p (TREE_OPERAND (expr, 0)) + : TREE_CODE (expr) == COMPONENT_REF + ? TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL + : 0); +} + +static int +objc_is_global_reference_p (tree expr) +{ + return (TREE_CODE (expr) == INDIRECT_REF || TREE_CODE (expr) == PLUS_EXPR + ? objc_is_global_reference_p (TREE_OPERAND (expr, 0)) + : DECL_P (expr) + ? (!DECL_CONTEXT (expr) || TREE_STATIC (expr)) + : 0); +} + +tree +objc_generate_write_barrier (tree lhs, enum tree_code modifycode, tree rhs) +{ + tree result = NULL_TREE, outer; + int strong_cast_p = 0, outer_gc_p = 0, indirect_p = 0; + + /* See if we have any lhs casts, and strip them out. NB: The lvalue casts + will have been transformed to the form '*(type *)&expr'. */ + if (TREE_CODE (lhs) == INDIRECT_REF) + { + outer = TREE_OPERAND (lhs, 0); + + while (!strong_cast_p + && (TREE_CODE (outer) == CONVERT_EXPR + || TREE_CODE (outer) == NOP_EXPR + || TREE_CODE (outer) == NON_LVALUE_EXPR)) + { + tree lhstype = TREE_TYPE (outer); + + /* Descend down the cast chain, and record the first objc_gc + attribute found. */ + if (POINTER_TYPE_P (lhstype)) + { + tree attr + = lookup_attribute ("objc_gc", + TYPE_ATTRIBUTES (TREE_TYPE (lhstype))); + + if (attr) + strong_cast_p = 1; + } + + outer = TREE_OPERAND (outer, 0); + } + } + + /* If we have a __strong cast, it trumps all else. */ + if (strong_cast_p) + { + if (modifycode != NOP_EXPR) + goto invalid_pointer_arithmetic; + + if (warn_assign_intercept) + warning (0, "strong-cast assignment has been intercepted"); + + result = objc_build_strong_cast_assignment (lhs, rhs); + + goto exit_point; + } + + /* the lhs must be of a suitable type, regardless of its underlying + structure. */ + if (!objc_is_gcable_p (lhs)) + goto exit_point; + + outer = lhs; + + while (outer + && (TREE_CODE (outer) == COMPONENT_REF + || TREE_CODE (outer) == ARRAY_REF)) + outer = TREE_OPERAND (outer, 0); + + if (TREE_CODE (outer) == INDIRECT_REF) + { + outer = TREE_OPERAND (outer, 0); + indirect_p = 1; + } + + outer_gc_p = objc_is_gcable_p (outer); + + /* Handle ivar assignments. */ + if (objc_is_ivar_reference_p (lhs)) + { + /* if the struct to the left of the ivar is not an Objective-C object (__strong + doesn't cut it here), the best we can do here is suggest a cast. */ + if (!objc_is_gcable_type (TREE_TYPE (outer), 0)) + { + /* We may still be able to use the global write barrier... */ + if (!indirect_p && objc_is_global_reference_p (outer)) + goto global_reference; + + suggest_cast: + if (modifycode == NOP_EXPR) + { + if (warn_assign_intercept) + warning (0, "strong-cast may possibly be needed"); + } + + goto exit_point; + } + + if (modifycode != NOP_EXPR) + goto invalid_pointer_arithmetic; + + if (warn_assign_intercept) + warning (0, "instance variable assignment has been intercepted"); + + result = objc_build_ivar_assignment (outer, lhs, rhs); + + goto exit_point; + } + + /* Likewise, intercept assignment to global/static variables if their type is + GC-marked. */ + if (objc_is_global_reference_p (outer)) + { + if (indirect_p) + goto suggest_cast; + + global_reference: + if (modifycode != NOP_EXPR) + { + invalid_pointer_arithmetic: + if (outer_gc_p) + warning (0, "pointer arithmetic for garbage-collected objects not allowed"); + + goto exit_point; + } + + if (warn_assign_intercept) + warning (0, "global/static variable assignment has been intercepted"); + + result = objc_build_global_assignment (lhs, rhs); + } + + /* In all other cases, fall back to the normal mechanism. */ + exit_point: + return result; +} + +struct interface_tuple GTY(()) +{ + tree id; + tree class_name; +}; + +static GTY ((param_is (struct interface_tuple))) htab_t interface_htab; + +static hashval_t +hash_interface (const void *p) +{ + const struct interface_tuple *d = p; + return IDENTIFIER_HASH_VALUE (d->id); +} + +static int +eq_interface (const void *p1, const void *p2) +{ + const struct interface_tuple *d = p1; + return d->id == p2; +} + +static tree +lookup_interface (tree ident) +{ +#ifdef OBJCPLUS + if (ident && TREE_CODE (ident) == TYPE_DECL) + ident = DECL_NAME (ident); +#endif + + if (ident == NULL_TREE || TREE_CODE (ident) != IDENTIFIER_NODE) + return NULL_TREE; + + { + struct interface_tuple **slot; + tree i = NULL_TREE; + + if (interface_htab) + { + slot = (struct interface_tuple **) + htab_find_slot_with_hash (interface_htab, ident, + IDENTIFIER_HASH_VALUE (ident), + NO_INSERT); + if (slot && *slot) + i = (*slot)->class_name; + } + return i; + } +} + +/* Implement @defs (<classname>) within struct bodies. */ + +tree +objc_get_class_ivars (tree class_name) +{ + tree interface = lookup_interface (class_name); + + if (interface) + return get_class_ivars (interface, true); + + error ("cannot find interface declaration for %qs", + IDENTIFIER_POINTER (class_name)); + + return error_mark_node; +} + +/* Used by: build_private_template, continue_class, + and for @defs constructs. */ + +static tree +get_class_ivars (tree interface, bool inherited) +{ + tree ivar_chain = copy_list (CLASS_RAW_IVARS (interface)); + + /* Both CLASS_RAW_IVARS and CLASS_IVARS contain a list of ivars declared + by the current class (i.e., they do not include super-class ivars). + However, the CLASS_IVARS list will be side-effected by a call to + finish_struct(), which will fill in field offsets. */ + if (!CLASS_IVARS (interface)) + CLASS_IVARS (interface) = ivar_chain; + + if (!inherited) + return ivar_chain; + + while (CLASS_SUPER_NAME (interface)) + { + /* Prepend super-class ivars. */ + interface = lookup_interface (CLASS_SUPER_NAME (interface)); + ivar_chain = chainon (copy_list (CLASS_RAW_IVARS (interface)), + ivar_chain); + } + + return ivar_chain; +} + +static tree +objc_create_temporary_var (tree type) +{ + tree decl; + + decl = build_decl (VAR_DECL, NULL_TREE, type); + TREE_USED (decl) = 1; + DECL_ARTIFICIAL (decl) = 1; + DECL_IGNORED_P (decl) = 1; + DECL_CONTEXT (decl) = current_function_decl; + + return decl; +} + +/* Exception handling constructs. We begin by having the parser do most + of the work and passing us blocks. What we do next depends on whether + we're doing "native" exception handling or legacy Darwin setjmp exceptions. + We abstract all of this in a handful of appropriately named routines. */ + +/* Stack of open try blocks. */ + +struct objc_try_context +{ + struct objc_try_context *outer; + + /* Statements (or statement lists) as processed by the parser. */ + tree try_body; + tree finally_body; + + /* Some file position locations. */ + location_t try_locus; + location_t end_try_locus; + location_t end_catch_locus; + location_t finally_locus; + location_t end_finally_locus; + + /* A STATEMENT_LIST of CATCH_EXPRs, appropriate for sticking into op1 + of a TRY_CATCH_EXPR. Even when doing Darwin setjmp. */ + tree catch_list; + + /* The CATCH_EXPR of an open @catch clause. */ + tree current_catch; + + /* The VAR_DECL holding the Darwin equivalent of EXC_PTR_EXPR. */ + tree caught_decl; + tree stack_decl; + tree rethrow_decl; +}; + +static struct objc_try_context *cur_try_context; + +/* This hook, called via lang_eh_runtime_type, generates a runtime object + that represents TYPE. For Objective-C, this is just the class name. */ +/* ??? Isn't there a class object or some such? Is it easy to get? */ + +#ifndef OBJCPLUS +static tree +objc_eh_runtime_type (tree type) +{ + return add_objc_string (OBJC_TYPE_NAME (TREE_TYPE (type)), class_names); +} +#endif + +/* Initialize exception handling. */ + +static void +objc_init_exceptions (void) +{ + static bool done = false; + if (done) + return; + done = true; + + if (flag_objc_sjlj_exceptions) + { + /* On Darwin, ObjC exceptions require a sufficiently recent + version of the runtime, so the user must ask for them explicitly. */ + if (!flag_objc_exceptions) + warning (0, "use %<-fobjc-exceptions%> to enable Objective-C " + "exception syntax"); + } +#ifndef OBJCPLUS + else + { + c_eh_initialized_p = true; + eh_personality_libfunc + = init_one_libfunc (USING_SJLJ_EXCEPTIONS + ? "__gnu_objc_personality_sj0" + : "__gnu_objc_personality_v0"); + default_init_unwind_resume_libfunc (); + using_eh_for_cleanups (); + lang_eh_runtime_type = objc_eh_runtime_type; + } +#endif +} + +/* Build an EXC_PTR_EXPR, or the moral equivalent. In the case of Darwin, + we'll arrange for it to be initialized (and associated with a binding) + later. */ + +static tree +objc_build_exc_ptr (void) +{ + if (flag_objc_sjlj_exceptions) + { + tree var = cur_try_context->caught_decl; + if (!var) + { + var = objc_create_temporary_var (objc_object_type); + cur_try_context->caught_decl = var; + } + return var; + } + else + return build0 (EXC_PTR_EXPR, objc_object_type); +} + +/* Build "objc_exception_try_exit(&_stack)". */ + +static tree +next_sjlj_build_try_exit (void) +{ + tree t; + t = build_fold_addr_expr (cur_try_context->stack_decl); + t = tree_cons (NULL, t, NULL); + t = build_function_call (objc_exception_try_exit_decl, t); + return t; +} + +/* Build + objc_exception_try_enter (&_stack); + if (_setjmp(&_stack.buf)) + ; + else + ; + Return the COND_EXPR. Note that the THEN and ELSE fields are left + empty, ready for the caller to fill them in. */ + +static tree +next_sjlj_build_enter_and_setjmp (void) +{ + tree t, enter, sj, cond; + + t = build_fold_addr_expr (cur_try_context->stack_decl); + t = tree_cons (NULL, t, NULL); + enter = build_function_call (objc_exception_try_enter_decl, t); + + t = objc_build_component_ref (cur_try_context->stack_decl, + get_identifier ("buf")); + t = build_fold_addr_expr (t); +#ifdef OBJCPLUS + /* Convert _setjmp argument to type that is expected. */ + if (TYPE_ARG_TYPES (TREE_TYPE (objc_setjmp_decl))) + t = convert (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (objc_setjmp_decl))), t); + else + t = convert (ptr_type_node, t); +#else + t = convert (ptr_type_node, t); +#endif + t = tree_cons (NULL, t, NULL); + sj = build_function_call (objc_setjmp_decl, t); + + cond = build2 (COMPOUND_EXPR, TREE_TYPE (sj), enter, sj); + cond = c_common_truthvalue_conversion (cond); + + return build3 (COND_EXPR, void_type_node, cond, NULL, NULL); +} + +/* Build: + + DECL = objc_exception_extract(&_stack); */ + +static tree +next_sjlj_build_exc_extract (tree decl) +{ + tree t; + + t = build_fold_addr_expr (cur_try_context->stack_decl); + t = tree_cons (NULL, t, NULL); + t = build_function_call (objc_exception_extract_decl, t); + t = convert (TREE_TYPE (decl), t); + t = build2 (MODIFY_EXPR, void_type_node, decl, t); + + return t; +} + +/* Build + if (objc_exception_match(obj_get_class(TYPE), _caught) + BODY + else if (...) + ... + else + { + _rethrow = _caught; + objc_exception_try_exit(&_stack); + } + from the sequence of CATCH_EXPRs in the current try context. */ + +static tree +next_sjlj_build_catch_list (void) +{ + tree_stmt_iterator i = tsi_start (cur_try_context->catch_list); + tree catch_seq, t; + tree *last = &catch_seq; + bool saw_id = false; + + for (; !tsi_end_p (i); tsi_next (&i)) + { + tree stmt = tsi_stmt (i); + tree type = CATCH_TYPES (stmt); + tree body = CATCH_BODY (stmt); + + if (type == NULL) + { + *last = body; + saw_id = true; + break; + } + else + { + tree args, cond; + + if (type == error_mark_node) + cond = error_mark_node; + else + { + args = tree_cons (NULL, cur_try_context->caught_decl, NULL); + t = objc_get_class_reference (OBJC_TYPE_NAME (TREE_TYPE (type))); + args = tree_cons (NULL, t, args); + t = build_function_call (objc_exception_match_decl, args); + cond = c_common_truthvalue_conversion (t); + } + t = build3 (COND_EXPR, void_type_node, cond, body, NULL); + SET_EXPR_LOCUS (t, EXPR_LOCUS (stmt)); + + *last = t; + last = &COND_EXPR_ELSE (t); + } + } + + if (!saw_id) + { + t = build2 (MODIFY_EXPR, void_type_node, cur_try_context->rethrow_decl, + cur_try_context->caught_decl); + SET_EXPR_LOCATION (t, cur_try_context->end_catch_locus); + append_to_statement_list (t, last); + + t = next_sjlj_build_try_exit (); + SET_EXPR_LOCATION (t, cur_try_context->end_catch_locus); + append_to_statement_list (t, last); + } + + return catch_seq; +} + +/* Build a complete @try-@catch-@finally block for legacy Darwin setjmp + exception handling. We aim to build: + + { + struct _objc_exception_data _stack; + id _rethrow = 0; + try + { + objc_exception_try_enter (&_stack); + if (_setjmp(&_stack.buf)) + { + id _caught = objc_exception_extract(&_stack); + objc_exception_try_enter (&_stack); + if (_setjmp(&_stack.buf)) + _rethrow = objc_exception_extract(&_stack); + else + CATCH-LIST + } + else + TRY-BLOCK + } + finally + { + if (!_rethrow) + objc_exception_try_exit(&_stack); + FINALLY-BLOCK + if (_rethrow) + objc_exception_throw(_rethrow); + } + } + + If CATCH-LIST is empty, we can omit all of the block containing + "_caught" except for the setting of _rethrow. Note the use of + a real TRY_FINALLY_EXPR here, which is not involved in EH per-se, + but handles goto and other exits from the block. */ + +static tree +next_sjlj_build_try_catch_finally (void) +{ + tree rethrow_decl, stack_decl, t; + tree catch_seq, try_fin, bind; + + /* Create the declarations involved. */ + t = xref_tag (RECORD_TYPE, get_identifier (UTAG_EXCDATA)); + stack_decl = objc_create_temporary_var (t); + cur_try_context->stack_decl = stack_decl; + + rethrow_decl = objc_create_temporary_var (objc_object_type); + cur_try_context->rethrow_decl = rethrow_decl; + TREE_CHAIN (rethrow_decl) = stack_decl; + + /* Build the outermost variable binding level. */ + bind = build3 (BIND_EXPR, void_type_node, rethrow_decl, NULL, NULL); + SET_EXPR_LOCATION (bind, cur_try_context->try_locus); + TREE_SIDE_EFFECTS (bind) = 1; + + /* Initialize rethrow_decl. */ + t = build2 (MODIFY_EXPR, void_type_node, rethrow_decl, + convert (objc_object_type, null_pointer_node)); + SET_EXPR_LOCATION (t, cur_try_context->try_locus); + append_to_statement_list (t, &BIND_EXPR_BODY (bind)); + + /* Build the outermost TRY_FINALLY_EXPR. */ + try_fin = build2 (TRY_FINALLY_EXPR, void_type_node, NULL, NULL); + SET_EXPR_LOCATION (try_fin, cur_try_context->try_locus); + TREE_SIDE_EFFECTS (try_fin) = 1; + append_to_statement_list (try_fin, &BIND_EXPR_BODY (bind)); + + /* Create the complete catch sequence. */ + if (cur_try_context->catch_list) + { + tree caught_decl = objc_build_exc_ptr (); + catch_seq = build_stmt (BIND_EXPR, caught_decl, NULL, NULL); + TREE_SIDE_EFFECTS (catch_seq) = 1; + + t = next_sjlj_build_exc_extract (caught_decl); + append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq)); + + t = next_sjlj_build_enter_and_setjmp (); + COND_EXPR_THEN (t) = next_sjlj_build_exc_extract (rethrow_decl); + COND_EXPR_ELSE (t) = next_sjlj_build_catch_list (); + append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq)); + } + else + catch_seq = next_sjlj_build_exc_extract (rethrow_decl); + SET_EXPR_LOCATION (catch_seq, cur_try_context->end_try_locus); + + /* Build the main register-and-try if statement. */ + t = next_sjlj_build_enter_and_setjmp (); + SET_EXPR_LOCATION (t, cur_try_context->try_locus); + COND_EXPR_THEN (t) = catch_seq; + COND_EXPR_ELSE (t) = cur_try_context->try_body; + TREE_OPERAND (try_fin, 0) = t; + + /* Build the complete FINALLY statement list. */ + t = next_sjlj_build_try_exit (); + t = build_stmt (COND_EXPR, + c_common_truthvalue_conversion (rethrow_decl), + NULL, t); + SET_EXPR_LOCATION (t, cur_try_context->finally_locus); + append_to_statement_list (t, &TREE_OPERAND (try_fin, 1)); + + append_to_statement_list (cur_try_context->finally_body, + &TREE_OPERAND (try_fin, 1)); + + t = tree_cons (NULL, rethrow_decl, NULL); + t = build_function_call (objc_exception_throw_decl, t); + t = build_stmt (COND_EXPR, + c_common_truthvalue_conversion (rethrow_decl), + t, NULL); + SET_EXPR_LOCATION (t, cur_try_context->end_finally_locus); + append_to_statement_list (t, &TREE_OPERAND (try_fin, 1)); + + return bind; +} + +/* Called just after parsing the @try and its associated BODY. We now + must prepare for the tricky bits -- handling the catches and finally. */ + +void +objc_begin_try_stmt (location_t try_locus, tree body) +{ + struct objc_try_context *c = xcalloc (1, sizeof (*c)); + c->outer = cur_try_context; + c->try_body = body; + c->try_locus = try_locus; + c->end_try_locus = input_location; + cur_try_context = c; + + objc_init_exceptions (); + + if (flag_objc_sjlj_exceptions) + objc_mark_locals_volatile (NULL); +} + +/* Called just after parsing "@catch (parm)". Open a binding level, + enter DECL into the binding level, and initialize it. Leave the + binding level open while the body of the compound statement is parsed. */ + +void +objc_begin_catch_clause (tree decl) +{ + tree compound, type, t; + + /* Begin a new scope that the entire catch clause will live in. */ + compound = c_begin_compound_stmt (true); + + /* The parser passed in a PARM_DECL, but what we really want is a VAR_DECL. */ + decl = build_decl (VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); + lang_hooks.decls.pushdecl (decl); + + /* Since a decl is required here by syntax, don't warn if its unused. */ + /* ??? As opposed to __attribute__((unused))? Anyway, this appears to + be what the previous objc implementation did. */ + TREE_USED (decl) = 1; + + /* Verify that the type of the catch is valid. It must be a pointer + to an Objective-C class, or "id" (which is catch-all). */ + type = TREE_TYPE (decl); + + if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type))) + type = NULL; + else if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type))) + { + error ("@catch parameter is not a known Objective-C class type"); + type = error_mark_node; + } + else if (cur_try_context->catch_list) + { + /* Examine previous @catch clauses and see if we've already + caught the type in question. */ + tree_stmt_iterator i = tsi_start (cur_try_context->catch_list); + for (; !tsi_end_p (i); tsi_next (&i)) + { + tree stmt = tsi_stmt (i); + t = CATCH_TYPES (stmt); + if (t == error_mark_node) + continue; + if (!t || DERIVED_FROM_P (TREE_TYPE (t), TREE_TYPE (type))) + { + warning (0, "exception of type %<%T%> will be caught", + TREE_TYPE (type)); + warning (0, "%H by earlier handler for %<%T%>", + EXPR_LOCUS (stmt), TREE_TYPE (t ? t : objc_object_type)); + break; + } + } + } + + /* Record the data for the catch in the try context so that we can + finalize it later. */ + t = build_stmt (CATCH_EXPR, type, compound); + cur_try_context->current_catch = t; + + /* Initialize the decl from the EXC_PTR_EXPR we get from the runtime. */ + t = objc_build_exc_ptr (); + t = convert (TREE_TYPE (decl), t); + t = build2 (MODIFY_EXPR, void_type_node, decl, t); + add_stmt (t); +} + +/* Called just after parsing the closing brace of a @catch clause. Close + the open binding level, and record a CATCH_EXPR for it. */ + +void +objc_finish_catch_clause (void) +{ + tree c = cur_try_context->current_catch; + cur_try_context->current_catch = NULL; + cur_try_context->end_catch_locus = input_location; + + CATCH_BODY (c) = c_end_compound_stmt (CATCH_BODY (c), 1); + append_to_statement_list (c, &cur_try_context->catch_list); +} + +/* Called after parsing a @finally clause and its associated BODY. + Record the body for later placement. */ + +void +objc_build_finally_clause (location_t finally_locus, tree body) +{ + cur_try_context->finally_body = body; + cur_try_context->finally_locus = finally_locus; + cur_try_context->end_finally_locus = input_location; +} + +/* Called to finalize a @try construct. */ + +tree +objc_finish_try_stmt (void) +{ + struct objc_try_context *c = cur_try_context; + tree stmt; + + if (c->catch_list == NULL && c->finally_body == NULL) + error ("%<@try%> without %<@catch%> or %<@finally%>"); + + /* If we're doing Darwin setjmp exceptions, build the big nasty. */ + if (flag_objc_sjlj_exceptions) + { + if (!cur_try_context->finally_body) + { + cur_try_context->finally_locus = input_location; + cur_try_context->end_finally_locus = input_location; + } + stmt = next_sjlj_build_try_catch_finally (); + } + else + { + /* Otherwise, nest the CATCH inside a FINALLY. */ + stmt = c->try_body; + if (c->catch_list) + { + stmt = build_stmt (TRY_CATCH_EXPR, stmt, c->catch_list); + SET_EXPR_LOCATION (stmt, cur_try_context->try_locus); + } + if (c->finally_body) + { + stmt = build_stmt (TRY_FINALLY_EXPR, stmt, c->finally_body); + SET_EXPR_LOCATION (stmt, cur_try_context->try_locus); + } + } + add_stmt (stmt); + + cur_try_context = c->outer; + free (c); + return stmt; +} + +tree +objc_build_throw_stmt (tree throw_expr) +{ + tree args; + + objc_init_exceptions (); + + if (throw_expr == NULL) + { + /* If we're not inside a @catch block, there is no "current + exception" to be rethrown. */ + if (cur_try_context == NULL + || cur_try_context->current_catch == NULL) + { + error ("%<@throw%> (rethrow) used outside of a @catch block"); + return NULL_TREE; + } + + /* Otherwise the object is still sitting in the EXC_PTR_EXPR + value that we get from the runtime. */ + throw_expr = objc_build_exc_ptr (); + } + + /* A throw is just a call to the runtime throw function with the + object as a parameter. */ + args = tree_cons (NULL, throw_expr, NULL); + return add_stmt (build_function_call (objc_exception_throw_decl, args)); +} + +tree +objc_build_synchronized (location_t start_locus, tree mutex, tree body) +{ + tree args, call; + + /* First lock the mutex. */ + mutex = save_expr (mutex); + args = tree_cons (NULL, mutex, NULL); + call = build_function_call (objc_sync_enter_decl, args); + SET_EXPR_LOCATION (call, start_locus); + add_stmt (call); + + /* Build the mutex unlock. */ + args = tree_cons (NULL, mutex, NULL); + call = build_function_call (objc_sync_exit_decl, args); + SET_EXPR_LOCATION (call, input_location); + + /* Put the that and the body in a TRY_FINALLY. */ + objc_begin_try_stmt (start_locus, body); + objc_build_finally_clause (input_location, call); + return objc_finish_try_stmt (); +} + + +/* Predefine the following data type: + + struct _objc_exception_data + { + int buf[OBJC_JBLEN]; + void *pointers[4]; + }; */ + +/* The following yuckiness should prevent users from having to #include + <setjmp.h> in their code... */ + +/* Define to a harmless positive value so the below code doesn't die. */ +#ifndef OBJC_JBLEN +#define OBJC_JBLEN 18 +#endif + +static void +build_next_objc_exception_stuff (void) +{ + tree field_decl, field_decl_chain, index, temp_type; + + objc_exception_data_template + = start_struct (RECORD_TYPE, get_identifier (UTAG_EXCDATA)); + + /* int buf[OBJC_JBLEN]; */ + + index = build_index_type (build_int_cst (NULL_TREE, OBJC_JBLEN - 1)); + field_decl = create_field_decl (build_array_type (integer_type_node, index), + "buf"); + field_decl_chain = field_decl; + + /* void *pointers[4]; */ + + index = build_index_type (build_int_cst (NULL_TREE, 4 - 1)); + field_decl = create_field_decl (build_array_type (ptr_type_node, index), + "pointers"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_exception_data_template, field_decl_chain, NULL_TREE); + + /* int _setjmp(...); */ + /* If the user includes <setjmp.h>, this shall be superseded by + 'int _setjmp(jmp_buf);' */ + temp_type = build_function_type (integer_type_node, NULL_TREE); + objc_setjmp_decl + = builtin_function (TAG_SETJMP, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + + /* id objc_exception_extract(struct _objc_exception_data *); */ + temp_type + = build_function_type (objc_object_type, + tree_cons (NULL_TREE, + build_pointer_type (objc_exception_data_template), + OBJC_VOID_AT_END)); + objc_exception_extract_decl + = builtin_function (TAG_EXCEPTIONEXTRACT, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + /* void objc_exception_try_enter(struct _objc_exception_data *); */ + /* void objc_exception_try_exit(struct _objc_exception_data *); */ + temp_type + = build_function_type (void_type_node, + tree_cons (NULL_TREE, + build_pointer_type (objc_exception_data_template), + OBJC_VOID_AT_END)); + objc_exception_try_enter_decl + = builtin_function (TAG_EXCEPTIONTRYENTER, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + objc_exception_try_exit_decl + = builtin_function (TAG_EXCEPTIONTRYEXIT, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + + /* int objc_exception_match(id, id); */ + temp_type + = build_function_type (integer_type_node, + tree_cons (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, objc_object_type, + OBJC_VOID_AT_END))); + objc_exception_match_decl + = builtin_function (TAG_EXCEPTIONMATCH, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + + /* id objc_assign_ivar (id, id, unsigned int); */ + /* id objc_assign_ivar_Fast (id, id, unsigned int) + __attribute__ ((hard_coded_address (OFFS_ASSIGNIVAR_FAST))); */ + temp_type + = build_function_type (objc_object_type, + tree_cons + (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, + unsigned_type_node, + OBJC_VOID_AT_END)))); + objc_assign_ivar_decl + = builtin_function (TAG_ASSIGNIVAR, temp_type, 0, NOT_BUILT_IN, + NULL, NULL_TREE); +#ifdef OFFS_ASSIGNIVAR_FAST + objc_assign_ivar_fast_decl + = builtin_function (TAG_ASSIGNIVAR_FAST, temp_type, 0, + NOT_BUILT_IN, NULL, NULL_TREE); + DECL_ATTRIBUTES (objc_assign_ivar_fast_decl) + = tree_cons (get_identifier ("hard_coded_address"), + build_int_cst (NULL_TREE, OFFS_ASSIGNIVAR_FAST), + NULL_TREE); +#else + /* Default to slower ivar method. */ + objc_assign_ivar_fast_decl = objc_assign_ivar_decl; +#endif + + /* id objc_assign_global (id, id *); */ + /* id objc_assign_strongCast (id, id *); */ + temp_type = build_function_type (objc_object_type, + tree_cons (NULL_TREE, objc_object_type, + tree_cons (NULL_TREE, build_pointer_type (objc_object_type), + OBJC_VOID_AT_END))); + objc_assign_global_decl + = builtin_function (TAG_ASSIGNGLOBAL, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); + objc_assign_strong_cast_decl + = builtin_function (TAG_ASSIGNSTRONGCAST, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); +} + +static void +build_objc_exception_stuff (void) +{ + tree noreturn_list, nothrow_list, temp_type; + + noreturn_list = tree_cons (get_identifier ("noreturn"), NULL, NULL); + nothrow_list = tree_cons (get_identifier ("nothrow"), NULL, NULL); + + /* void objc_exception_throw(id) __attribute__((noreturn)); */ + /* void objc_sync_enter(id); */ + /* void objc_sync_exit(id); */ + temp_type = build_function_type (void_type_node, + tree_cons (NULL_TREE, objc_object_type, + OBJC_VOID_AT_END)); + objc_exception_throw_decl + = builtin_function (TAG_EXCEPTIONTHROW, temp_type, 0, NOT_BUILT_IN, NULL, + noreturn_list); + objc_sync_enter_decl + = builtin_function (TAG_SYNCENTER, temp_type, 0, NOT_BUILT_IN, + NULL, nothrow_list); + objc_sync_exit_decl + = builtin_function (TAG_SYNCEXIT, temp_type, 0, NOT_BUILT_IN, + NULL, nothrow_list); +} + +/* Construct a C struct corresponding to ObjC class CLASS, with the same + name as the class: + + struct <classname> { + struct _objc_class *isa; + ... + }; */ + +static void +build_private_template (tree class) +{ + if (!CLASS_STATIC_TEMPLATE (class)) + { + tree record = objc_build_struct (class, + get_class_ivars (class, false), + CLASS_SUPER_NAME (class)); + + /* Set the TREE_USED bit for this struct, so that stab generator + can emit stabs for this struct type. */ + if (flag_debug_only_used_symbols && TYPE_STUB_DECL (record)) + TREE_USED (TYPE_STUB_DECL (record)) = 1; + } +} + +/* Begin code generation for protocols... */ + +/* struct _objc_protocol { + struct _objc_class *isa; + char *protocol_name; + struct _objc_protocol **protocol_list; + struct _objc__method_prototype_list *instance_methods; + struct _objc__method_prototype_list *class_methods; + }; */ + +static void +build_protocol_template (void) +{ + tree field_decl, field_decl_chain; + + objc_protocol_template = start_struct (RECORD_TYPE, + get_identifier (UTAG_PROTOCOL)); + + /* struct _objc_class *isa; */ + field_decl = create_field_decl (build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier (UTAG_CLASS))), + "isa"); + field_decl_chain = field_decl; + + /* char *protocol_name; */ + field_decl = create_field_decl (string_type_node, "protocol_name"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_protocol **protocol_list; */ + field_decl = create_field_decl (build_pointer_type + (build_pointer_type + (objc_protocol_template)), + "protocol_list"); + chainon (field_decl_chain, field_decl); + + /* struct _objc__method_prototype_list *instance_methods; */ + field_decl = create_field_decl (objc_method_proto_list_ptr, + "instance_methods"); + chainon (field_decl_chain, field_decl); + + /* struct _objc__method_prototype_list *class_methods; */ + field_decl = create_field_decl (objc_method_proto_list_ptr, + "class_methods"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_protocol_template, field_decl_chain, NULL_TREE); +} + +static tree +build_descriptor_table_initializer (tree type, tree entries) +{ + tree initlist = NULL_TREE; + + do + { + tree eltlist = NULL_TREE; + + eltlist + = tree_cons (NULL_TREE, + build_selector (METHOD_SEL_NAME (entries)), NULL_TREE); + eltlist + = tree_cons (NULL_TREE, + add_objc_string (METHOD_ENCODING (entries), + meth_var_types), + eltlist); + + initlist + = tree_cons (NULL_TREE, + objc_build_constructor (type, nreverse (eltlist)), + initlist); + + entries = TREE_CHAIN (entries); + } + while (entries); + + return objc_build_constructor (build_array_type (type, 0), + nreverse (initlist)); +} + +/* struct objc_method_prototype_list { + int count; + struct objc_method_prototype { + SEL name; + char *types; + } list[1]; + }; */ + +static tree +build_method_prototype_list_template (tree list_type, int size) +{ + tree objc_ivar_list_record; + tree field_decl, field_decl_chain; + + /* Generate an unnamed struct definition. */ + + objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE); + + /* int method_count; */ + field_decl = create_field_decl (integer_type_node, "method_count"); + field_decl_chain = field_decl; + + /* struct objc_method method_list[]; */ + field_decl = create_field_decl (build_array_type + (list_type, + build_index_type + (build_int_cst (NULL_TREE, size - 1))), + "method_list"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE); + + return objc_ivar_list_record; +} + +static tree +build_method_prototype_template (void) +{ + tree proto_record; + tree field_decl, field_decl_chain; + + proto_record + = start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD_PROTOTYPE)); + + /* SEL _cmd; */ + field_decl = create_field_decl (objc_selector_type, "_cmd"); + field_decl_chain = field_decl; + + /* char *method_types; */ + field_decl = create_field_decl (string_type_node, "method_types"); + chainon (field_decl_chain, field_decl); + + finish_struct (proto_record, field_decl_chain, NULL_TREE); + + return proto_record; +} + +static tree +objc_method_parm_type (tree type) +{ + type = TREE_VALUE (TREE_TYPE (type)); + if (TREE_CODE (type) == TYPE_DECL) + type = TREE_TYPE (type); + return type; +} + +static int +objc_encoded_type_size (tree type) +{ + int sz = int_size_in_bytes (type); + + /* Make all integer and enum types at least as large + as an int. */ + if (sz > 0 && INTEGRAL_TYPE_P (type)) + sz = MAX (sz, int_size_in_bytes (integer_type_node)); + /* Treat arrays as pointers, since that's how they're + passed in. */ + else if (TREE_CODE (type) == ARRAY_TYPE) + sz = int_size_in_bytes (ptr_type_node); + return sz; +} + +static tree +encode_method_prototype (tree method_decl) +{ + tree parms; + int parm_offset, i; + char buf[40]; + tree result; + + /* ONEWAY and BYCOPY, for remote object are the only method qualifiers. */ + encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (method_decl))); + + /* Encode return type. */ + encode_type (objc_method_parm_type (method_decl), + obstack_object_size (&util_obstack), + OBJC_ENCODE_INLINE_DEFS); + + /* Stack size. */ + /* The first two arguments (self and _cmd) are pointers; account for + their size. */ + i = int_size_in_bytes (ptr_type_node); + parm_offset = 2 * i; + for (parms = METHOD_SEL_ARGS (method_decl); parms; + parms = TREE_CHAIN (parms)) + { + tree type = objc_method_parm_type (parms); + int sz = objc_encoded_type_size (type); + + /* If a type size is not known, bail out. */ + if (sz < 0) + { + error ("type %q+D does not have a known size", + type); + /* Pretend that the encoding succeeded; the compilation will + fail nevertheless. */ + goto finish_encoding; + } + parm_offset += sz; + } + + sprintf (buf, "%d@0:%d", parm_offset, i); + obstack_grow (&util_obstack, buf, strlen (buf)); + + /* Argument types. */ + parm_offset = 2 * i; + for (parms = METHOD_SEL_ARGS (method_decl); parms; + parms = TREE_CHAIN (parms)) + { + tree type = objc_method_parm_type (parms); + + /* Process argument qualifiers for user supplied arguments. */ + encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (parms))); + + /* Type. */ + encode_type (type, obstack_object_size (&util_obstack), + OBJC_ENCODE_INLINE_DEFS); + + /* Compute offset. */ + sprintf (buf, "%d", parm_offset); + parm_offset += objc_encoded_type_size (type); + + obstack_grow (&util_obstack, buf, strlen (buf)); + } + + finish_encoding: + obstack_1grow (&util_obstack, '\0'); + result = get_identifier (obstack_finish (&util_obstack)); + obstack_free (&util_obstack, util_firstobj); + return result; +} + +static tree +generate_descriptor_table (tree type, const char *name, int size, tree list, + tree proto) +{ + tree decl, initlist; + + decl = start_var_decl (type, synth_id_with_class_suffix (name, proto)); + + initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, size)); + initlist = tree_cons (NULL_TREE, list, initlist); + + finish_var_decl (decl, objc_build_constructor (type, nreverse (initlist))); + + return decl; +} + +static void +generate_method_descriptors (tree protocol) +{ + tree initlist, chain, method_list_template; + int size; + + if (!objc_method_prototype_template) + objc_method_prototype_template = build_method_prototype_template (); + + chain = PROTOCOL_CLS_METHODS (protocol); + if (chain) + { + size = list_length (chain); + + method_list_template + = build_method_prototype_list_template (objc_method_prototype_template, + size); + + initlist + = build_descriptor_table_initializer (objc_method_prototype_template, + chain); + + UOBJC_CLASS_METHODS_decl + = generate_descriptor_table (method_list_template, + "_OBJC_PROTOCOL_CLASS_METHODS", + size, initlist, protocol); + } + else + UOBJC_CLASS_METHODS_decl = 0; + + chain = PROTOCOL_NST_METHODS (protocol); + if (chain) + { + size = list_length (chain); + + method_list_template + = build_method_prototype_list_template (objc_method_prototype_template, + size); + initlist + = build_descriptor_table_initializer (objc_method_prototype_template, + chain); + + UOBJC_INSTANCE_METHODS_decl + = generate_descriptor_table (method_list_template, + "_OBJC_PROTOCOL_INSTANCE_METHODS", + size, initlist, protocol); + } + else + UOBJC_INSTANCE_METHODS_decl = 0; +} + +static void +generate_protocol_references (tree plist) +{ + tree lproto; + + /* Forward declare protocols referenced. */ + for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) + { + tree proto = TREE_VALUE (lproto); + + if (TREE_CODE (proto) == PROTOCOL_INTERFACE_TYPE + && PROTOCOL_NAME (proto)) + { + if (! PROTOCOL_FORWARD_DECL (proto)) + build_protocol_reference (proto); + + if (PROTOCOL_LIST (proto)) + generate_protocol_references (PROTOCOL_LIST (proto)); + } + } +} + +/* Generate either '- .cxx_construct' or '- .cxx_destruct' for the + current class. */ +#ifdef OBJCPLUS +static void +objc_generate_cxx_ctor_or_dtor (bool dtor) +{ + tree fn, body, compound_stmt, ivar; + + /* - (id) .cxx_construct { ... return self; } */ + /* - (void) .cxx_construct { ... } */ + + objc_set_method_type (MINUS_EXPR); + objc_start_method_definition + (objc_build_method_signature (build_tree_list (NULL_TREE, + dtor + ? void_type_node + : objc_object_type), + get_identifier (dtor + ? TAG_CXX_DESTRUCT + : TAG_CXX_CONSTRUCT), + make_node (TREE_LIST), + false)); + body = begin_function_body (); + compound_stmt = begin_compound_stmt (0); + + ivar = CLASS_IVARS (implementation_template); + /* Destroy ivars in reverse order. */ + if (dtor) + ivar = nreverse (copy_list (ivar)); + + for (; ivar; ivar = TREE_CHAIN (ivar)) + { + if (TREE_CODE (ivar) == FIELD_DECL) + { + tree type = TREE_TYPE (ivar); + + /* Call the ivar's default constructor or destructor. Do not + call the destructor unless a corresponding constructor call + has also been made (or is not needed). */ + if (IS_AGGR_TYPE (type) + && (dtor + ? (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) + && (!TYPE_NEEDS_CONSTRUCTING (type) + || TYPE_HAS_DEFAULT_CONSTRUCTOR (type))) + : (TYPE_NEEDS_CONSTRUCTING (type) + && TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))) + finish_expr_stmt + (build_special_member_call + (build_ivar_reference (DECL_NAME (ivar)), + dtor ? complete_dtor_identifier : complete_ctor_identifier, + NULL_TREE, type, LOOKUP_NORMAL)); + } + } + + /* The constructor returns 'self'. */ + if (!dtor) + finish_return_stmt (self_decl); + + finish_compound_stmt (compound_stmt); + finish_function_body (body); + fn = current_function_decl; + finish_function (); + objc_finish_method_definition (fn); +} + +/* The following routine will examine the current @interface for any + non-POD C++ ivars requiring non-trivial construction and/or + destruction, and then synthesize special '- .cxx_construct' and/or + '- .cxx_destruct' methods which will run the appropriate + construction or destruction code. Note that ivars inherited from + super-classes are _not_ considered. */ +static void +objc_generate_cxx_cdtors (void) +{ + bool need_ctor = false, need_dtor = false; + tree ivar; + + /* We do not want to do this for categories, since they do not have + their own ivars. */ + + if (TREE_CODE (objc_implementation_context) != CLASS_IMPLEMENTATION_TYPE) + return; + + /* First, determine if we even need a constructor and/or destructor. */ + + for (ivar = CLASS_IVARS (implementation_template); ivar; + ivar = TREE_CHAIN (ivar)) + { + if (TREE_CODE (ivar) == FIELD_DECL) + { + tree type = TREE_TYPE (ivar); + + if (IS_AGGR_TYPE (type)) + { + if (TYPE_NEEDS_CONSTRUCTING (type) + && TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) + /* NB: If a default constructor is not available, we will not + be able to initialize this ivar; the add_instance_variable() + routine will already have warned about this. */ + need_ctor = true; + + if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) + && (!TYPE_NEEDS_CONSTRUCTING (type) + || TYPE_HAS_DEFAULT_CONSTRUCTOR (type))) + /* NB: If a default constructor is not available, we will not + call the destructor either, for symmetry. */ + need_dtor = true; + } + } + } + + /* Generate '- .cxx_construct' if needed. */ + + if (need_ctor) + objc_generate_cxx_ctor_or_dtor (false); + + /* Generate '- .cxx_destruct' if needed. */ + + if (need_dtor) + objc_generate_cxx_ctor_or_dtor (true); + + /* The 'imp_list' variable points at an imp_entry record for the current + @implementation. Record the existence of '- .cxx_construct' and/or + '- .cxx_destruct' methods therein; it will be included in the + metadata for the class. */ + if (flag_next_runtime) + imp_list->has_cxx_cdtors = (need_ctor || need_dtor); +} +#endif + +/* For each protocol which was referenced either from a @protocol() + expression, or because a class/category implements it (then a + pointer to the protocol is stored in the struct describing the + class/category), we create a statically allocated instance of the + Protocol class. The code is written in such a way as to generate + as few Protocol objects as possible; we generate a unique Protocol + instance for each protocol, and we don't generate a Protocol + instance if the protocol is never referenced (either from a + @protocol() or from a class/category implementation). These + statically allocated objects can be referred to via the static + (that is, private to this module) symbols _OBJC_PROTOCOL_n. + + The statically allocated Protocol objects that we generate here + need to be fixed up at runtime in order to be used: the 'isa' + pointer of the objects need to be set up to point to the 'Protocol' + class, as known at runtime. + + The NeXT runtime fixes up all protocols at program startup time, + before main() is entered. It uses a low-level trick to look up all + those symbols, then loops on them and fixes them up. + + The GNU runtime as well fixes up all protocols before user code + from the module is executed; it requires pointers to those symbols + to be put in the objc_symtab (which is then passed as argument to + the function __objc_exec_class() which the compiler sets up to be + executed automatically when the module is loaded); setup of those + Protocol objects happen in two ways in the GNU runtime: all + Protocol objects referred to by a class or category implementation + are fixed up when the class/category is loaded; all Protocol + objects referred to by a @protocol() expression are added by the + compiler to the list of statically allocated instances to fixup + (the same list holding the statically allocated constant string + objects). Because, as explained above, the compiler generates as + few Protocol objects as possible, some Protocol object might end up + being referenced multiple times when compiled with the GNU runtime, + and end up being fixed up multiple times at runtime initialization. + But that doesn't hurt, it's just a little inefficient. */ + +static void +generate_protocols (void) +{ + tree p, encoding; + tree decl; + tree initlist, protocol_name_expr, refs_decl, refs_expr; + + /* If a protocol was directly referenced, pull in indirect references. */ + for (p = protocol_chain; p; p = TREE_CHAIN (p)) + if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p)) + generate_protocol_references (PROTOCOL_LIST (p)); + + for (p = protocol_chain; p; p = TREE_CHAIN (p)) + { + tree nst_methods = PROTOCOL_NST_METHODS (p); + tree cls_methods = PROTOCOL_CLS_METHODS (p); + + /* If protocol wasn't referenced, don't generate any code. */ + decl = PROTOCOL_FORWARD_DECL (p); + + if (!decl) + continue; + + /* Make sure we link in the Protocol class. */ + add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); + + while (nst_methods) + { + if (! METHOD_ENCODING (nst_methods)) + { + encoding = encode_method_prototype (nst_methods); + METHOD_ENCODING (nst_methods) = encoding; + } + nst_methods = TREE_CHAIN (nst_methods); + } + + while (cls_methods) + { + if (! METHOD_ENCODING (cls_methods)) + { + encoding = encode_method_prototype (cls_methods); + METHOD_ENCODING (cls_methods) = encoding; + } + + cls_methods = TREE_CHAIN (cls_methods); + } + generate_method_descriptors (p); + + if (PROTOCOL_LIST (p)) + refs_decl = generate_protocol_list (p); + else + refs_decl = 0; + + /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */ + protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names); + + if (refs_decl) + refs_expr = convert (build_pointer_type (build_pointer_type + (objc_protocol_template)), + build_unary_op (ADDR_EXPR, refs_decl, 0)); + else + refs_expr = build_int_cst (NULL_TREE, 0); + + /* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set + by generate_method_descriptors, which is called above. */ + initlist = build_protocol_initializer (TREE_TYPE (decl), + protocol_name_expr, refs_expr, + UOBJC_INSTANCE_METHODS_decl, + UOBJC_CLASS_METHODS_decl); + finish_var_decl (decl, initlist); + } +} + +static tree +build_protocol_initializer (tree type, tree protocol_name, + tree protocol_list, tree instance_methods, + tree class_methods) +{ + tree initlist = NULL_TREE, expr; + tree cast_type = build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier (UTAG_CLASS))); + + /* Filling the "isa" in with one allows the runtime system to + detect that the version change...should remove before final release. */ + + expr = build_int_cst (cast_type, PROTOCOL_VERSION); + initlist = tree_cons (NULL_TREE, expr, initlist); + initlist = tree_cons (NULL_TREE, protocol_name, initlist); + initlist = tree_cons (NULL_TREE, protocol_list, initlist); + + if (!instance_methods) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (objc_method_proto_list_ptr, + build_unary_op (ADDR_EXPR, instance_methods, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + if (!class_methods) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (objc_method_proto_list_ptr, + build_unary_op (ADDR_EXPR, class_methods, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + return objc_build_constructor (type, nreverse (initlist)); +} + +/* struct _objc_category { + char *category_name; + char *class_name; + struct _objc_method_list *instance_methods; + struct _objc_method_list *class_methods; + struct _objc_protocol_list *protocols; + }; */ + +static void +build_category_template (void) +{ + tree field_decl, field_decl_chain; + + objc_category_template = start_struct (RECORD_TYPE, + get_identifier (UTAG_CATEGORY)); + + /* char *category_name; */ + field_decl = create_field_decl (string_type_node, "category_name"); + field_decl_chain = field_decl; + + /* char *class_name; */ + field_decl = create_field_decl (string_type_node, "class_name"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_method_list *instance_methods; */ + field_decl = create_field_decl (objc_method_list_ptr, + "instance_methods"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_method_list *class_methods; */ + field_decl = create_field_decl (objc_method_list_ptr, + "class_methods"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_protocol **protocol_list; */ + field_decl = create_field_decl (build_pointer_type + (build_pointer_type + (objc_protocol_template)), + "protocol_list"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_category_template, field_decl_chain, NULL_TREE); +} + +/* struct _objc_selector { + SEL sel_id; + char *sel_type; + }; */ + +static void +build_selector_template (void) +{ + + tree field_decl, field_decl_chain; + + objc_selector_template + = start_struct (RECORD_TYPE, get_identifier (UTAG_SELECTOR)); + + /* SEL sel_id; */ + field_decl = create_field_decl (objc_selector_type, "sel_id"); + field_decl_chain = field_decl; + + /* char *sel_type; */ + field_decl = create_field_decl (string_type_node, "sel_type"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_selector_template, field_decl_chain, NULL_TREE); +} + +/* struct _objc_class { + struct _objc_class *isa; + struct _objc_class *super_class; + char *name; + long version; + long info; + long instance_size; + struct _objc_ivar_list *ivars; + struct _objc_method_list *methods; + #ifdef __NEXT_RUNTIME__ + struct objc_cache *cache; + #else + struct sarray *dtable; + struct _objc_class *subclass_list; + struct _objc_class *sibling_class; + #endif + struct _objc_protocol_list *protocols; + #ifdef __NEXT_RUNTIME__ + void *sel_id; + #endif + void *gc_object_type; + }; */ + +/* NB: The 'sel_id' and 'gc_object_type' fields are not being used by + the NeXT/Apple runtime; still, the compiler must generate them to + maintain backward binary compatibility (and to allow for future + expansion). */ + +static void +build_class_template (void) +{ + tree field_decl, field_decl_chain; + + objc_class_template + = start_struct (RECORD_TYPE, get_identifier (UTAG_CLASS)); + + /* struct _objc_class *isa; */ + field_decl = create_field_decl (build_pointer_type (objc_class_template), + "isa"); + field_decl_chain = field_decl; + + /* struct _objc_class *super_class; */ + field_decl = create_field_decl (build_pointer_type (objc_class_template), + "super_class"); + chainon (field_decl_chain, field_decl); + + /* char *name; */ + field_decl = create_field_decl (string_type_node, "name"); + chainon (field_decl_chain, field_decl); + + /* long version; */ + field_decl = create_field_decl (long_integer_type_node, "version"); + chainon (field_decl_chain, field_decl); + + /* long info; */ + field_decl = create_field_decl (long_integer_type_node, "info"); + chainon (field_decl_chain, field_decl); + + /* long instance_size; */ + field_decl = create_field_decl (long_integer_type_node, "instance_size"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_ivar_list *ivars; */ + field_decl = create_field_decl (objc_ivar_list_ptr, + "ivars"); + chainon (field_decl_chain, field_decl); + + /* struct _objc_method_list *methods; */ + field_decl = create_field_decl (objc_method_list_ptr, + "methods"); + chainon (field_decl_chain, field_decl); + + if (flag_next_runtime) + { + /* struct objc_cache *cache; */ + field_decl = create_field_decl (build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier + ("objc_cache"))), + "cache"); + chainon (field_decl_chain, field_decl); + } + else + { + /* struct sarray *dtable; */ + field_decl = create_field_decl (build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier + ("sarray"))), + "dtable"); + chainon (field_decl_chain, field_decl); + + /* struct objc_class *subclass_list; */ + field_decl = create_field_decl (build_pointer_type + (objc_class_template), + "subclass_list"); + chainon (field_decl_chain, field_decl); + + /* struct objc_class *sibling_class; */ + field_decl = create_field_decl (build_pointer_type + (objc_class_template), + "sibling_class"); + chainon (field_decl_chain, field_decl); + } + + /* struct _objc_protocol **protocol_list; */ + field_decl = create_field_decl (build_pointer_type + (build_pointer_type + (xref_tag (RECORD_TYPE, + get_identifier + (UTAG_PROTOCOL)))), + "protocol_list"); + chainon (field_decl_chain, field_decl); + + if (flag_next_runtime) + { + /* void *sel_id; */ + field_decl = create_field_decl (build_pointer_type (void_type_node), + "sel_id"); + chainon (field_decl_chain, field_decl); + } + + /* void *gc_object_type; */ + field_decl = create_field_decl (build_pointer_type (void_type_node), + "gc_object_type"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_class_template, field_decl_chain, NULL_TREE); +} + +/* Generate appropriate forward declarations for an implementation. */ + +static void +synth_forward_declarations (void) +{ + tree an_id; + + /* static struct objc_class _OBJC_CLASS_<my_name>; */ + UOBJC_CLASS_decl = build_metadata_decl ("_OBJC_CLASS", + objc_class_template); + + /* static struct objc_class _OBJC_METACLASS_<my_name>; */ + UOBJC_METACLASS_decl = build_metadata_decl ("_OBJC_METACLASS", + objc_class_template); + + /* Pre-build the following entities - for speed/convenience. */ + + an_id = get_identifier ("super_class"); + ucls_super_ref = objc_build_component_ref (UOBJC_CLASS_decl, an_id); + uucls_super_ref = objc_build_component_ref (UOBJC_METACLASS_decl, an_id); +} + +static void +error_with_ivar (const char *message, tree decl) +{ + error ("%J%s %qs", decl, + message, gen_declaration (decl)); + +} + +static void +check_ivars (tree inter, tree imp) +{ + tree intdecls = CLASS_RAW_IVARS (inter); + tree impdecls = CLASS_RAW_IVARS (imp); + + while (1) + { + tree t1, t2; + +#ifdef OBJCPLUS + if (intdecls && TREE_CODE (intdecls) == TYPE_DECL) + intdecls = TREE_CHAIN (intdecls); +#endif + if (intdecls == 0 && impdecls == 0) + break; + if (intdecls == 0 || impdecls == 0) + { + error ("inconsistent instance variable specification"); + break; + } + + t1 = TREE_TYPE (intdecls); t2 = TREE_TYPE (impdecls); + + if (!comptypes (t1, t2) + || !tree_int_cst_equal (DECL_INITIAL (intdecls), + DECL_INITIAL (impdecls))) + { + if (DECL_NAME (intdecls) == DECL_NAME (impdecls)) + { + error_with_ivar ("conflicting instance variable type", + impdecls); + error_with_ivar ("previous declaration of", + intdecls); + } + else /* both the type and the name don't match */ + { + error ("inconsistent instance variable specification"); + break; + } + } + + else if (DECL_NAME (intdecls) != DECL_NAME (impdecls)) + { + error_with_ivar ("conflicting instance variable name", + impdecls); + error_with_ivar ("previous declaration of", + intdecls); + } + + intdecls = TREE_CHAIN (intdecls); + impdecls = TREE_CHAIN (impdecls); + } +} + +/* Set 'objc_super_template' to the data type node for 'struct _objc_super'. + This needs to be done just once per compilation. */ + +/* struct _objc_super { + struct _objc_object *self; + struct _objc_class *super_class; + }; */ + +static void +build_super_template (void) +{ + tree field_decl, field_decl_chain; + + objc_super_template = start_struct (RECORD_TYPE, get_identifier (UTAG_SUPER)); + + /* struct _objc_object *self; */ + field_decl = create_field_decl (objc_object_type, "self"); + field_decl_chain = field_decl; + + /* struct _objc_class *super_class; */ + field_decl = create_field_decl (build_pointer_type (objc_class_template), + "super_class"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_super_template, field_decl_chain, NULL_TREE); +} + +/* struct _objc_ivar { + char *ivar_name; + char *ivar_type; + int ivar_offset; + }; */ + +static tree +build_ivar_template (void) +{ + tree objc_ivar_id, objc_ivar_record; + tree field_decl, field_decl_chain; + + objc_ivar_id = get_identifier (UTAG_IVAR); + objc_ivar_record = start_struct (RECORD_TYPE, objc_ivar_id); + + /* char *ivar_name; */ + field_decl = create_field_decl (string_type_node, "ivar_name"); + field_decl_chain = field_decl; + + /* char *ivar_type; */ + field_decl = create_field_decl (string_type_node, "ivar_type"); + chainon (field_decl_chain, field_decl); + + /* int ivar_offset; */ + field_decl = create_field_decl (integer_type_node, "ivar_offset"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_ivar_record, field_decl_chain, NULL_TREE); + + return objc_ivar_record; +} + +/* struct { + int ivar_count; + struct objc_ivar ivar_list[ivar_count]; + }; */ + +static tree +build_ivar_list_template (tree list_type, int size) +{ + tree objc_ivar_list_record; + tree field_decl, field_decl_chain; + + objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE); + + /* int ivar_count; */ + field_decl = create_field_decl (integer_type_node, "ivar_count"); + field_decl_chain = field_decl; + + /* struct objc_ivar ivar_list[]; */ + field_decl = create_field_decl (build_array_type + (list_type, + build_index_type + (build_int_cst (NULL_TREE, size - 1))), + "ivar_list"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE); + + return objc_ivar_list_record; +} + +/* struct { + struct _objc__method_prototype_list *method_next; + int method_count; + struct objc_method method_list[method_count]; + }; */ + +static tree +build_method_list_template (tree list_type, int size) +{ + tree objc_ivar_list_record; + tree field_decl, field_decl_chain; + + objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE); + + /* struct _objc__method_prototype_list *method_next; */ + field_decl = create_field_decl (objc_method_proto_list_ptr, + "method_next"); + field_decl_chain = field_decl; + + /* int method_count; */ + field_decl = create_field_decl (integer_type_node, "method_count"); + chainon (field_decl_chain, field_decl); + + /* struct objc_method method_list[]; */ + field_decl = create_field_decl (build_array_type + (list_type, + build_index_type + (build_int_cst (NULL_TREE, size - 1))), + "method_list"); + chainon (field_decl_chain, field_decl); + + finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE); + + return objc_ivar_list_record; +} + +static tree +build_ivar_list_initializer (tree type, tree field_decl) +{ + tree initlist = NULL_TREE; + + do + { + tree ivar = NULL_TREE; + + /* Set name. */ + if (DECL_NAME (field_decl)) + ivar = tree_cons (NULL_TREE, + add_objc_string (DECL_NAME (field_decl), + meth_var_names), + ivar); + else + /* Unnamed bit-field ivar (yuck). */ + ivar = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), ivar); + + /* Set type. */ + encode_field_decl (field_decl, + obstack_object_size (&util_obstack), + OBJC_ENCODE_DONT_INLINE_DEFS); + + /* Null terminate string. */ + obstack_1grow (&util_obstack, 0); + ivar + = tree_cons + (NULL_TREE, + add_objc_string (get_identifier (obstack_finish (&util_obstack)), + meth_var_types), + ivar); + obstack_free (&util_obstack, util_firstobj); + + /* Set offset. */ + ivar = tree_cons (NULL_TREE, byte_position (field_decl), ivar); + initlist = tree_cons (NULL_TREE, + objc_build_constructor (type, nreverse (ivar)), + initlist); + do + field_decl = TREE_CHAIN (field_decl); + while (field_decl && TREE_CODE (field_decl) != FIELD_DECL); + } + while (field_decl); + + return objc_build_constructor (build_array_type (type, 0), + nreverse (initlist)); +} + +static tree +generate_ivars_list (tree type, const char *name, int size, tree list) +{ + tree decl, initlist; + + decl = start_var_decl (type, synth_id_with_class_suffix + (name, objc_implementation_context)); + + initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, size)); + initlist = tree_cons (NULL_TREE, list, initlist); + + finish_var_decl (decl, + objc_build_constructor (TREE_TYPE (decl), + nreverse (initlist))); + + return decl; +} + +/* Count only the fields occurring in T. */ + +static int +ivar_list_length (tree t) +{ + int count = 0; + + for (; t; t = TREE_CHAIN (t)) + if (TREE_CODE (t) == FIELD_DECL) + ++count; + + return count; +} + +static void +generate_ivar_lists (void) +{ + tree initlist, ivar_list_template, chain; + int size; + + generating_instance_variables = 1; + + if (!objc_ivar_template) + objc_ivar_template = build_ivar_template (); + + /* Only generate class variables for the root of the inheritance + hierarchy since these will be the same for every class. */ + + if (CLASS_SUPER_NAME (implementation_template) == NULL_TREE + && (chain = TYPE_FIELDS (objc_class_template))) + { + size = ivar_list_length (chain); + + ivar_list_template = build_ivar_list_template (objc_ivar_template, size); + initlist = build_ivar_list_initializer (objc_ivar_template, chain); + + UOBJC_CLASS_VARIABLES_decl + = generate_ivars_list (ivar_list_template, "_OBJC_CLASS_VARIABLES", + size, initlist); + } + else + UOBJC_CLASS_VARIABLES_decl = 0; + + chain = CLASS_IVARS (implementation_template); + if (chain) + { + size = ivar_list_length (chain); + ivar_list_template = build_ivar_list_template (objc_ivar_template, size); + initlist = build_ivar_list_initializer (objc_ivar_template, chain); + + UOBJC_INSTANCE_VARIABLES_decl + = generate_ivars_list (ivar_list_template, "_OBJC_INSTANCE_VARIABLES", + size, initlist); + } + else + UOBJC_INSTANCE_VARIABLES_decl = 0; + + generating_instance_variables = 0; +} + +static tree +build_dispatch_table_initializer (tree type, tree entries) +{ + tree initlist = NULL_TREE; + + do + { + tree elemlist = NULL_TREE; + + elemlist = tree_cons (NULL_TREE, + build_selector (METHOD_SEL_NAME (entries)), + NULL_TREE); + + /* Generate the method encoding if we don't have one already. */ + if (! METHOD_ENCODING (entries)) + METHOD_ENCODING (entries) = + encode_method_prototype (entries); + + elemlist = tree_cons (NULL_TREE, + add_objc_string (METHOD_ENCODING (entries), + meth_var_types), + elemlist); + + elemlist + = tree_cons (NULL_TREE, + convert (ptr_type_node, + build_unary_op (ADDR_EXPR, + METHOD_DEFINITION (entries), 1)), + elemlist); + + initlist = tree_cons (NULL_TREE, + objc_build_constructor (type, nreverse (elemlist)), + initlist); + + entries = TREE_CHAIN (entries); + } + while (entries); + + return objc_build_constructor (build_array_type (type, 0), + nreverse (initlist)); +} + +/* To accomplish method prototyping without generating all kinds of + inane warnings, the definition of the dispatch table entries were + changed from: + + struct objc_method { SEL _cmd; ...; id (*_imp)(); }; + to: + struct objc_method { SEL _cmd; ...; void *_imp; }; */ + +static tree +build_method_template (void) +{ + tree _SLT_record; + tree field_decl, field_decl_chain; + + _SLT_record = start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD)); + + /* SEL _cmd; */ + field_decl = create_field_decl (objc_selector_type, "_cmd"); + field_decl_chain = field_decl; + + /* char *method_types; */ + field_decl = create_field_decl (string_type_node, "method_types"); + chainon (field_decl_chain, field_decl); + + /* void *_imp; */ + field_decl = create_field_decl (build_pointer_type (void_type_node), + "_imp"); + chainon (field_decl_chain, field_decl); + + finish_struct (_SLT_record, field_decl_chain, NULL_TREE); + + return _SLT_record; +} + + +static tree +generate_dispatch_table (tree type, const char *name, int size, tree list) +{ + tree decl, initlist; + + decl = start_var_decl (type, synth_id_with_class_suffix + (name, objc_implementation_context)); + + initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, 0)); + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, size), initlist); + initlist = tree_cons (NULL_TREE, list, initlist); + + finish_var_decl (decl, + objc_build_constructor (TREE_TYPE (decl), + nreverse (initlist))); + + return decl; +} + +static void +mark_referenced_methods (void) +{ + struct imp_entry *impent; + tree chain; + + for (impent = imp_list; impent; impent = impent->next) + { + chain = CLASS_CLS_METHODS (impent->imp_context); + while (chain) + { + cgraph_mark_needed_node (cgraph_node (METHOD_DEFINITION (chain))); + chain = TREE_CHAIN (chain); + } + + chain = CLASS_NST_METHODS (impent->imp_context); + while (chain) + { + cgraph_mark_needed_node (cgraph_node (METHOD_DEFINITION (chain))); + chain = TREE_CHAIN (chain); + } + } +} + +static void +generate_dispatch_tables (void) +{ + tree initlist, chain, method_list_template; + int size; + + if (!objc_method_template) + objc_method_template = build_method_template (); + + chain = CLASS_CLS_METHODS (objc_implementation_context); + if (chain) + { + size = list_length (chain); + + method_list_template + = build_method_list_template (objc_method_template, size); + initlist + = build_dispatch_table_initializer (objc_method_template, chain); + + UOBJC_CLASS_METHODS_decl + = generate_dispatch_table (method_list_template, + ((TREE_CODE (objc_implementation_context) + == CLASS_IMPLEMENTATION_TYPE) + ? "_OBJC_CLASS_METHODS" + : "_OBJC_CATEGORY_CLASS_METHODS"), + size, initlist); + } + else + UOBJC_CLASS_METHODS_decl = 0; + + chain = CLASS_NST_METHODS (objc_implementation_context); + if (chain) + { + size = list_length (chain); + + method_list_template + = build_method_list_template (objc_method_template, size); + initlist + = build_dispatch_table_initializer (objc_method_template, chain); + + if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE) + UOBJC_INSTANCE_METHODS_decl + = generate_dispatch_table (method_list_template, + "_OBJC_INSTANCE_METHODS", + size, initlist); + else + /* We have a category. */ + UOBJC_INSTANCE_METHODS_decl + = generate_dispatch_table (method_list_template, + "_OBJC_CATEGORY_INSTANCE_METHODS", + size, initlist); + } + else + UOBJC_INSTANCE_METHODS_decl = 0; +} + +static tree +generate_protocol_list (tree i_or_p) +{ + tree initlist; + tree refs_decl, lproto, e, plist; + int size = 0; + const char *ref_name; + + if (TREE_CODE (i_or_p) == CLASS_INTERFACE_TYPE + || TREE_CODE (i_or_p) == CATEGORY_INTERFACE_TYPE) + plist = CLASS_PROTOCOL_LIST (i_or_p); + else if (TREE_CODE (i_or_p) == PROTOCOL_INTERFACE_TYPE) + plist = PROTOCOL_LIST (i_or_p); + else + abort (); + + /* Compute size. */ + for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) + if (TREE_CODE (TREE_VALUE (lproto)) == PROTOCOL_INTERFACE_TYPE + && PROTOCOL_FORWARD_DECL (TREE_VALUE (lproto))) + size++; + + /* Build initializer. */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), NULL_TREE); + e = build_int_cst (build_pointer_type (objc_protocol_template), size); + initlist = tree_cons (NULL_TREE, e, initlist); + + for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) + { + tree pval = TREE_VALUE (lproto); + + if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE + && PROTOCOL_FORWARD_DECL (pval)) + { + e = build_unary_op (ADDR_EXPR, PROTOCOL_FORWARD_DECL (pval), 0); + initlist = tree_cons (NULL_TREE, e, initlist); + } + } + + /* static struct objc_protocol *refs[n]; */ + + if (TREE_CODE (i_or_p) == PROTOCOL_INTERFACE_TYPE) + ref_name = synth_id_with_class_suffix ("_OBJC_PROTOCOL_REFS", i_or_p); + else if (TREE_CODE (i_or_p) == CLASS_INTERFACE_TYPE) + ref_name = synth_id_with_class_suffix ("_OBJC_CLASS_PROTOCOLS", i_or_p); + else if (TREE_CODE (i_or_p) == CATEGORY_INTERFACE_TYPE) + ref_name = synth_id_with_class_suffix ("_OBJC_CATEGORY_PROTOCOLS", i_or_p); + else + abort (); + + refs_decl = start_var_decl + (build_array_type + (build_pointer_type (objc_protocol_template), + build_index_type (build_int_cst (NULL_TREE, size + 2))), + ref_name); + + finish_var_decl (refs_decl, objc_build_constructor (TREE_TYPE (refs_decl), + nreverse (initlist))); + + return refs_decl; +} + +static tree +build_category_initializer (tree type, tree cat_name, tree class_name, + tree instance_methods, tree class_methods, + tree protocol_list) +{ + tree initlist = NULL_TREE, expr; + + initlist = tree_cons (NULL_TREE, cat_name, initlist); + initlist = tree_cons (NULL_TREE, class_name, initlist); + + if (!instance_methods) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (objc_method_list_ptr, + build_unary_op (ADDR_EXPR, instance_methods, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + if (!class_methods) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (objc_method_list_ptr, + build_unary_op (ADDR_EXPR, class_methods, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + /* protocol_list = */ + if (!protocol_list) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (build_pointer_type + (build_pointer_type + (objc_protocol_template)), + build_unary_op (ADDR_EXPR, protocol_list, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + return objc_build_constructor (type, nreverse (initlist)); +} + +/* struct _objc_class { + struct objc_class *isa; + struct objc_class *super_class; + char *name; + long version; + long info; + long instance_size; + struct objc_ivar_list *ivars; + struct objc_method_list *methods; + if (flag_next_runtime) + struct objc_cache *cache; + else { + struct sarray *dtable; + struct objc_class *subclass_list; + struct objc_class *sibling_class; + } + struct objc_protocol_list *protocols; + if (flag_next_runtime) + void *sel_id; + void *gc_object_type; + }; */ + +static tree +build_shared_structure_initializer (tree type, tree isa, tree super, + tree name, tree size, int status, + tree dispatch_table, tree ivar_list, + tree protocol_list) +{ + tree initlist = NULL_TREE, expr; + + /* isa = */ + initlist = tree_cons (NULL_TREE, isa, initlist); + + /* super_class = */ + initlist = tree_cons (NULL_TREE, super, initlist); + + /* name = */ + initlist = tree_cons (NULL_TREE, default_conversion (name), initlist); + + /* version = */ + initlist = tree_cons (NULL_TREE, build_int_cst (long_integer_type_node, 0), + initlist); + + /* info = */ + initlist = tree_cons (NULL_TREE, + build_int_cst (long_integer_type_node, status), + initlist); + + /* instance_size = */ + initlist = tree_cons (NULL_TREE, convert (long_integer_type_node, size), + initlist); + + /* objc_ivar_list = */ + if (!ivar_list) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (objc_ivar_list_ptr, + build_unary_op (ADDR_EXPR, ivar_list, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + /* objc_method_list = */ + if (!dispatch_table) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (objc_method_list_ptr, + build_unary_op (ADDR_EXPR, dispatch_table, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + if (flag_next_runtime) + /* method_cache = */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + /* dtable = */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + + /* subclass_list = */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + + /* sibling_class = */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + } + + /* protocol_list = */ + if (! protocol_list) + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + else + { + expr = convert (build_pointer_type + (build_pointer_type + (objc_protocol_template)), + build_unary_op (ADDR_EXPR, protocol_list, 0)); + initlist = tree_cons (NULL_TREE, expr, initlist); + } + + if (flag_next_runtime) + /* sel_id = NULL */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + + /* gc_object_type = NULL */ + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist); + + return objc_build_constructor (type, nreverse (initlist)); +} + +/* Retrieve category interface CAT_NAME (if any) associated with CLASS. */ + +static inline tree +lookup_category (tree class, tree cat_name) +{ + tree category = CLASS_CATEGORY_LIST (class); + + while (category && CLASS_SUPER_NAME (category) != cat_name) + category = CLASS_CATEGORY_LIST (category); + return category; +} + +/* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */ + +static void +generate_category (tree cat) +{ + tree decl; + tree initlist, cat_name_expr, class_name_expr; + tree protocol_decl, category; + + add_class_reference (CLASS_NAME (cat)); + cat_name_expr = add_objc_string (CLASS_SUPER_NAME (cat), class_names); + + class_name_expr = add_objc_string (CLASS_NAME (cat), class_names); + + category = lookup_category (implementation_template, + CLASS_SUPER_NAME (cat)); + + if (category && CLASS_PROTOCOL_LIST (category)) + { + generate_protocol_references (CLASS_PROTOCOL_LIST (category)); + protocol_decl = generate_protocol_list (category); + } + else + protocol_decl = 0; + + decl = start_var_decl (objc_category_template, + synth_id_with_class_suffix + ("_OBJC_CATEGORY", objc_implementation_context)); + + initlist = build_category_initializer (TREE_TYPE (decl), + cat_name_expr, class_name_expr, + UOBJC_INSTANCE_METHODS_decl, + UOBJC_CLASS_METHODS_decl, + protocol_decl); + + finish_var_decl (decl, initlist); +} + +/* static struct objc_class _OBJC_METACLASS_Foo={ ... }; + static struct objc_class _OBJC_CLASS_Foo={ ... }; */ + +static void +generate_shared_structures (int cls_flags) +{ + tree sc_spec, decl_specs, decl; + tree name_expr, super_expr, root_expr; + tree my_root_id = NULL_TREE, my_super_id = NULL_TREE; + tree cast_type, initlist, protocol_decl; + + my_super_id = CLASS_SUPER_NAME (implementation_template); + if (my_super_id) + { + add_class_reference (my_super_id); + + /* Compute "my_root_id" - this is required for code generation. + the "isa" for all meta class structures points to the root of + the inheritance hierarchy (e.g. "__Object")... */ + my_root_id = my_super_id; + do + { + tree my_root_int = lookup_interface (my_root_id); + + if (my_root_int && CLASS_SUPER_NAME (my_root_int)) + my_root_id = CLASS_SUPER_NAME (my_root_int); + else + break; + } + while (1); + } + else + /* No super class. */ + my_root_id = CLASS_NAME (implementation_template); + + cast_type = build_pointer_type (objc_class_template); + name_expr = add_objc_string (CLASS_NAME (implementation_template), + class_names); + + /* Install class `isa' and `super' pointers at runtime. */ + if (my_super_id) + { + super_expr = add_objc_string (my_super_id, class_names); + super_expr = build_c_cast (cast_type, super_expr); /* cast! */ + } + else + super_expr = build_int_cst (NULL_TREE, 0); + + root_expr = add_objc_string (my_root_id, class_names); + root_expr = build_c_cast (cast_type, root_expr); /* cast! */ + + if (CLASS_PROTOCOL_LIST (implementation_template)) + { + generate_protocol_references + (CLASS_PROTOCOL_LIST (implementation_template)); + protocol_decl = generate_protocol_list (implementation_template); + } + else + protocol_decl = 0; + + /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */ + + sc_spec = build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC]); + decl_specs = tree_cons (NULL_TREE, objc_class_template, sc_spec); + + decl = start_var_decl (objc_class_template, + IDENTIFIER_POINTER + (DECL_NAME (UOBJC_METACLASS_decl))); + + initlist + = build_shared_structure_initializer + (TREE_TYPE (decl), + root_expr, super_expr, name_expr, + convert (integer_type_node, TYPE_SIZE_UNIT (objc_class_template)), + 2 /*CLS_META*/, + UOBJC_CLASS_METHODS_decl, + UOBJC_CLASS_VARIABLES_decl, + protocol_decl); + + finish_var_decl (decl, initlist); + + /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */ + + decl = start_var_decl (objc_class_template, + IDENTIFIER_POINTER + (DECL_NAME (UOBJC_CLASS_decl))); + + initlist + = build_shared_structure_initializer + (TREE_TYPE (decl), + build_unary_op (ADDR_EXPR, UOBJC_METACLASS_decl, 0), + super_expr, name_expr, + convert (integer_type_node, + TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE + (implementation_template))), + 1 /*CLS_FACTORY*/ | cls_flags, + UOBJC_INSTANCE_METHODS_decl, + UOBJC_INSTANCE_VARIABLES_decl, + protocol_decl); + + finish_var_decl (decl, initlist); +} + + +static const char * +synth_id_with_class_suffix (const char *preamble, tree ctxt) +{ + static char string[BUFSIZE]; + + if (TREE_CODE (ctxt) == CLASS_IMPLEMENTATION_TYPE + || TREE_CODE (ctxt) == CLASS_INTERFACE_TYPE) + { + sprintf (string, "%s_%s", preamble, + IDENTIFIER_POINTER (CLASS_NAME (ctxt))); + } + else if (TREE_CODE (ctxt) == CATEGORY_IMPLEMENTATION_TYPE + || TREE_CODE (ctxt) == CATEGORY_INTERFACE_TYPE) + { + /* We have a category. */ + const char *const class_name + = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)); + const char *const class_super_name + = IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)); + sprintf (string, "%s_%s_%s", preamble, class_name, class_super_name); + } + else if (TREE_CODE (ctxt) == PROTOCOL_INTERFACE_TYPE) + { + const char *protocol_name = IDENTIFIER_POINTER (PROTOCOL_NAME (ctxt)); + sprintf (string, "%s_%s", preamble, protocol_name); + } + else + abort (); + + return string; +} + +/* If type is empty or only type qualifiers are present, add default + type of id (otherwise grokdeclarator will default to int). */ + +static tree +adjust_type_for_id_default (tree type) +{ + if (!type) + type = make_node (TREE_LIST); + + if (!TREE_VALUE (type)) + TREE_VALUE (type) = objc_object_type; + else if (TREE_CODE (TREE_VALUE (type)) == RECORD_TYPE + && TYPED_OBJECT (TREE_VALUE (type))) + error ("can not use an object as parameter to a method"); + + return type; +} + +/* Usage: + keyworddecl: + selector ':' '(' typename ')' identifier + + Purpose: + Transform an Objective-C keyword argument into + the C equivalent parameter declarator. + + In: key_name, an "identifier_node" (optional). + arg_type, a "tree_list" (optional). + arg_name, an "identifier_node". + + Note: It would be really nice to strongly type the preceding + arguments in the function prototype; however, then I + could not use the "accessor" macros defined in "tree.h". + + Out: an instance of "keyword_decl". */ + +tree +objc_build_keyword_decl (tree key_name, tree arg_type, tree arg_name) +{ + tree keyword_decl; + + /* If no type is specified, default to "id". */ + arg_type = adjust_type_for_id_default (arg_type); + + keyword_decl = make_node (KEYWORD_DECL); + + TREE_TYPE (keyword_decl) = arg_type; + KEYWORD_ARG_NAME (keyword_decl) = arg_name; + KEYWORD_KEY_NAME (keyword_decl) = key_name; + + return keyword_decl; +} + +/* Given a chain of keyword_decl's, synthesize the full keyword selector. */ + +static tree +build_keyword_selector (tree selector) +{ + int len = 0; + tree key_chain, key_name; + char *buf; + + /* Scan the selector to see how much space we'll need. */ + for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain)) + { + if (TREE_CODE (selector) == KEYWORD_DECL) + key_name = KEYWORD_KEY_NAME (key_chain); + else if (TREE_CODE (selector) == TREE_LIST) + key_name = TREE_PURPOSE (key_chain); + else + abort (); + + if (key_name) + len += IDENTIFIER_LENGTH (key_name) + 1; + else + /* Just a ':' arg. */ + len++; + } + + buf = (char *) alloca (len + 1); + /* Start the buffer out as an empty string. */ + buf[0] = '\0'; + + for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain)) + { + if (TREE_CODE (selector) == KEYWORD_DECL) + key_name = KEYWORD_KEY_NAME (key_chain); + else if (TREE_CODE (selector) == TREE_LIST) + { + key_name = TREE_PURPOSE (key_chain); + /* The keyword decl chain will later be used as a function argument + chain. Unhook the selector itself so as to not confuse other + parts of the compiler. */ + TREE_PURPOSE (key_chain) = NULL_TREE; + } + else + abort (); + + if (key_name) + strcat (buf, IDENTIFIER_POINTER (key_name)); + strcat (buf, ":"); + } + + return get_identifier (buf); +} + +/* Used for declarations and definitions. */ + +static tree +build_method_decl (enum tree_code code, tree ret_type, tree selector, + tree add_args, bool ellipsis) +{ + tree method_decl; + + /* If no type is specified, default to "id". */ + ret_type = adjust_type_for_id_default (ret_type); + + method_decl = make_node (code); + TREE_TYPE (method_decl) = ret_type; + + /* If we have a keyword selector, create an identifier_node that + represents the full selector name (`:' included)... */ + if (TREE_CODE (selector) == KEYWORD_DECL) + { + METHOD_SEL_NAME (method_decl) = build_keyword_selector (selector); + METHOD_SEL_ARGS (method_decl) = selector; + METHOD_ADD_ARGS (method_decl) = add_args; + METHOD_ADD_ARGS_ELLIPSIS_P (method_decl) = ellipsis; + } + else + { + METHOD_SEL_NAME (method_decl) = selector; + METHOD_SEL_ARGS (method_decl) = NULL_TREE; + METHOD_ADD_ARGS (method_decl) = NULL_TREE; + } + + return method_decl; +} + +#define METHOD_DEF 0 +#define METHOD_REF 1 + +/* Used by `build_objc_method_call' and `comp_proto_with_proto'. Return + an argument list for method METH. CONTEXT is either METHOD_DEF or + METHOD_REF, saying whether we are trying to define a method or call + one. SUPERFLAG says this is for a send to super; this makes a + difference for the NeXT calling sequence in which the lookup and + the method call are done together. If METH is null, user-defined + arguments (i.e., beyond self and _cmd) shall be represented by `...'. */ + +static tree +get_arg_type_list (tree meth, int context, int superflag) +{ + tree arglist, akey; + + /* Receiver type. */ + if (flag_next_runtime && superflag) + arglist = build_tree_list (NULL_TREE, objc_super_type); + else if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL) + arglist = build_tree_list (NULL_TREE, objc_instance_type); + else + arglist = build_tree_list (NULL_TREE, objc_object_type); + + /* Selector type - will eventually change to `int'. */ + chainon (arglist, build_tree_list (NULL_TREE, objc_selector_type)); + + /* No actual method prototype given -- assume that remaining arguments + are `...'. */ + if (!meth) + return arglist; + + /* Build a list of argument types. */ + for (akey = METHOD_SEL_ARGS (meth); akey; akey = TREE_CHAIN (akey)) + { + tree arg_type = TREE_VALUE (TREE_TYPE (akey)); + + /* Decay arrays and functions into pointers. */ + if (TREE_CODE (arg_type) == ARRAY_TYPE) + arg_type = build_pointer_type (TREE_TYPE (arg_type)); + else if (TREE_CODE (arg_type) == FUNCTION_TYPE) + arg_type = build_pointer_type (arg_type); + + chainon (arglist, build_tree_list (NULL_TREE, arg_type)); + } + + if (METHOD_ADD_ARGS (meth)) + { + for (akey = TREE_CHAIN (METHOD_ADD_ARGS (meth)); + akey; akey = TREE_CHAIN (akey)) + { + tree arg_type = TREE_TYPE (TREE_VALUE (akey)); + + chainon (arglist, build_tree_list (NULL_TREE, arg_type)); + } + + if (!METHOD_ADD_ARGS_ELLIPSIS_P (meth)) + goto lack_of_ellipsis; + } + else + { + lack_of_ellipsis: + chainon (arglist, OBJC_VOID_AT_END); + } + + return arglist; +} + +static tree +check_duplicates (hash hsh, int methods, int is_class) +{ + tree meth = NULL_TREE; + + if (hsh) + { + meth = hsh->key; + + if (hsh->list) + { + /* We have two or more methods with the same name but + different types. */ + attr loop; + + /* But just how different are those types? If + -Wno-strict-selector-match is specified, we shall not + complain if the differences are solely among types with + identical size and alignment. */ + if (!warn_strict_selector_match) + { + for (loop = hsh->list; loop; loop = loop->next) + if (!comp_proto_with_proto (meth, loop->value, 0)) + goto issue_warning; + + return meth; + } + + issue_warning: + warning (0, "multiple %s named %<%c%s%> found", + methods ? "methods" : "selectors", + (is_class ? '+' : '-'), + IDENTIFIER_POINTER (METHOD_SEL_NAME (meth))); + + warn_with_method (methods ? "using" : "found", + ((TREE_CODE (meth) == INSTANCE_METHOD_DECL) + ? '-' + : '+'), + meth); + for (loop = hsh->list; loop; loop = loop->next) + warn_with_method ("also found", + ((TREE_CODE (loop->value) == INSTANCE_METHOD_DECL) + ? '-' + : '+'), + loop->value); + } + } + return meth; +} + +/* If RECEIVER is a class reference, return the identifier node for + the referenced class. RECEIVER is created by objc_get_class_reference, + so we check the exact form created depending on which runtimes are + used. */ + +static tree +receiver_is_class_object (tree receiver, int self, int super) +{ + tree chain, exp, arg; + + /* The receiver is 'self' or 'super' in the context of a class method. */ + if (objc_method_context + && TREE_CODE (objc_method_context) == CLASS_METHOD_DECL + && (self || super)) + return (super + ? CLASS_SUPER_NAME (implementation_template) + : CLASS_NAME (implementation_template)); + + if (flag_next_runtime) + { + /* The receiver is a variable created by + build_class_reference_decl. */ + if (TREE_CODE (receiver) == VAR_DECL && IS_CLASS (TREE_TYPE (receiver))) + /* Look up the identifier. */ + for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain)) + if (TREE_PURPOSE (chain) == receiver) + return TREE_VALUE (chain); + } + + /* The receiver is a function call that returns an id. Check if + it is a call to objc_getClass, if so, pick up the class name. */ + if (TREE_CODE (receiver) == CALL_EXPR + && (exp = TREE_OPERAND (receiver, 0)) + && TREE_CODE (exp) == ADDR_EXPR + && (exp = TREE_OPERAND (exp, 0)) + && TREE_CODE (exp) == FUNCTION_DECL + /* For some reason, we sometimes wind up with multiple FUNCTION_DECL + prototypes for objc_get_class(). Thankfully, they seem to share the + same function type. */ + && TREE_TYPE (exp) == TREE_TYPE (objc_get_class_decl) + && !strcmp (IDENTIFIER_POINTER (DECL_NAME (exp)), TAG_GETCLASS) + /* We have a call to objc_get_class/objc_getClass! */ + && (arg = TREE_OPERAND (receiver, 1)) + && TREE_CODE (arg) == TREE_LIST + && (arg = TREE_VALUE (arg))) + { + STRIP_NOPS (arg); + if (TREE_CODE (arg) == ADDR_EXPR + && (arg = TREE_OPERAND (arg, 0)) + && TREE_CODE (arg) == STRING_CST) + /* Finally, we have the class name. */ + return get_identifier (TREE_STRING_POINTER (arg)); + } + return 0; +} + +/* If we are currently building a message expr, this holds + the identifier of the selector of the message. This is + used when printing warnings about argument mismatches. */ + +static tree current_objc_message_selector = 0; + +tree +objc_message_selector (void) +{ + return current_objc_message_selector; +} + +/* Construct an expression for sending a message. + MESS has the object to send to in TREE_PURPOSE + and the argument list (including selector) in TREE_VALUE. + + (*(<abstract_decl>(*)())_msg)(receiver, selTransTbl[n], ...); + (*(<abstract_decl>(*)())_msgSuper)(receiver, selTransTbl[n], ...); */ + +tree +objc_build_message_expr (tree mess) +{ + tree receiver = TREE_PURPOSE (mess); + tree sel_name; +#ifdef OBJCPLUS + tree args = TREE_PURPOSE (TREE_VALUE (mess)); +#else + tree args = TREE_VALUE (mess); +#endif + tree method_params = NULL_TREE; + + if (TREE_CODE (receiver) == ERROR_MARK) + return error_mark_node; + + /* Obtain the full selector name. */ + if (TREE_CODE (args) == IDENTIFIER_NODE) + /* A unary selector. */ + sel_name = args; + else if (TREE_CODE (args) == TREE_LIST) + sel_name = build_keyword_selector (args); + else + abort (); + + /* Build the parameter list to give to the method. */ + if (TREE_CODE (args) == TREE_LIST) +#ifdef OBJCPLUS + method_params = chainon (args, TREE_VALUE (TREE_VALUE (mess))); +#else + { + tree chain = args, prev = NULL_TREE; + + /* We have a keyword selector--check for comma expressions. */ + while (chain) + { + tree element = TREE_VALUE (chain); + + /* We have a comma expression, must collapse... */ + if (TREE_CODE (element) == TREE_LIST) + { + if (prev) + TREE_CHAIN (prev) = element; + else + args = element; + } + prev = chain; + chain = TREE_CHAIN (chain); + } + method_params = args; + } +#endif + +#ifdef OBJCPLUS + if (processing_template_decl) + /* Must wait until template instantiation time. */ + return build_min_nt (MESSAGE_SEND_EXPR, receiver, sel_name, + method_params); +#endif + + return objc_finish_message_expr (receiver, sel_name, method_params); +} + +/* Look up method SEL_NAME that would be suitable for receiver + of type 'id' (if IS_CLASS is zero) or 'Class' (if IS_CLASS is + nonzero), and report on any duplicates. */ + +static tree +lookup_method_in_hash_lists (tree sel_name, int is_class) +{ + hash method_prototype = NULL; + + if (!is_class) + method_prototype = hash_lookup (nst_method_hash_list, + sel_name); + + if (!method_prototype) + { + method_prototype = hash_lookup (cls_method_hash_list, + sel_name); + is_class = 1; + } + + return check_duplicates (method_prototype, 1, is_class); +} + +/* The 'objc_finish_message_expr' routine is called from within + 'objc_build_message_expr' for non-template functions. In the case of + C++ template functions, it is called from 'build_expr_from_tree' + (in decl2.c) after RECEIVER and METHOD_PARAMS have been expanded. */ + +tree +objc_finish_message_expr (tree receiver, tree sel_name, tree method_params) +{ + tree method_prototype = NULL_TREE, rprotos = NULL_TREE, rtype; + tree selector, retval, class_tree; + int self, super, have_cast; + + /* Extract the receiver of the message, as well as its type + (where the latter may take the form of a cast or be inferred + from the implementation context). */ + rtype = receiver; + while (TREE_CODE (rtype) == COMPOUND_EXPR + || TREE_CODE (rtype) == MODIFY_EXPR + || TREE_CODE (rtype) == NOP_EXPR + || TREE_CODE (rtype) == CONVERT_EXPR + || TREE_CODE (rtype) == COMPONENT_REF) + rtype = TREE_OPERAND (rtype, 0); + self = (rtype == self_decl); + super = (rtype == UOBJC_SUPER_decl); + rtype = TREE_TYPE (receiver); + have_cast = (TREE_CODE (receiver) == NOP_EXPR + || (TREE_CODE (receiver) == COMPOUND_EXPR + && !IS_SUPER (rtype))); + + /* If we are calling [super dealloc], reset our warning flag. */ + if (super && !strcmp ("dealloc", IDENTIFIER_POINTER (sel_name))) + should_call_super_dealloc = 0; + + /* If the receiver is a class object, retrieve the corresponding + @interface, if one exists. */ + class_tree = receiver_is_class_object (receiver, self, super); + + /* Now determine the receiver type (if an explicit cast has not been + provided). */ + if (!have_cast) + { + if (class_tree) + rtype = lookup_interface (class_tree); + /* Handle `self' and `super'. */ + else if (super) + { + if (!CLASS_SUPER_NAME (implementation_template)) + { + error ("no super class declared in @interface for %qs", + IDENTIFIER_POINTER (CLASS_NAME (implementation_template))); + return error_mark_node; + } + rtype = lookup_interface (CLASS_SUPER_NAME (implementation_template)); + } + else if (self) + rtype = lookup_interface (CLASS_NAME (implementation_template)); + } + + /* If receiver is of type `id' or `Class' (or if the @interface for a + class is not visible), we shall be satisfied with the existence of + any instance or class method. */ + if (objc_is_id (rtype)) + { + class_tree = (IS_CLASS (rtype) ? objc_class_name : NULL_TREE); + rprotos = (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype)) + ? TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype)) + : NULL_TREE); + rtype = NULL_TREE; + + if (rprotos) + { + /* If messaging 'id <Protos>' or 'Class <Proto>', first search + in protocols themselves for the method prototype. */ + method_prototype + = lookup_method_in_protocol_list (rprotos, sel_name, + class_tree != NULL_TREE); + + /* If messaging 'Class <Proto>' but did not find a class method + prototype, search for an instance method instead, and warn + about having done so. */ + if (!method_prototype && !rtype && class_tree != NULL_TREE) + { + method_prototype + = lookup_method_in_protocol_list (rprotos, sel_name, 0); + + if (method_prototype) + warning (0, "found %<-%s%> instead of %<+%s%> in protocol(s)", + IDENTIFIER_POINTER (sel_name), + IDENTIFIER_POINTER (sel_name)); + } + } + } + else if (rtype) + { + tree orig_rtype = rtype, saved_rtype; + + if (TREE_CODE (rtype) == POINTER_TYPE) + rtype = TREE_TYPE (rtype); + /* Traverse typedef aliases */ + while (TREE_CODE (rtype) == RECORD_TYPE && OBJC_TYPE_NAME (rtype) + && TREE_CODE (OBJC_TYPE_NAME (rtype)) == TYPE_DECL + && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype))) + rtype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype)); + saved_rtype = rtype; + if (TYPED_OBJECT (rtype)) + { + rprotos = TYPE_OBJC_PROTOCOL_LIST (rtype); + rtype = TYPE_OBJC_INTERFACE (rtype); + } + /* If we could not find an @interface declaration, we must have + only seen a @class declaration; so, we cannot say anything + more intelligent about which methods the receiver will + understand. */ + if (!rtype || TREE_CODE (rtype) == IDENTIFIER_NODE) + rtype = NULL_TREE; + else if (TREE_CODE (rtype) == CLASS_INTERFACE_TYPE + || TREE_CODE (rtype) == CLASS_IMPLEMENTATION_TYPE) + { + /* We have a valid ObjC class name. Look up the method name + in the published @interface for the class (and its + superclasses). */ + method_prototype + = lookup_method_static (rtype, sel_name, class_tree != NULL_TREE); + + /* If the method was not found in the @interface, it may still + exist locally as part of the @implementation. */ + if (!method_prototype && objc_implementation_context + && CLASS_NAME (objc_implementation_context) + == OBJC_TYPE_NAME (rtype)) + method_prototype + = lookup_method + ((class_tree + ? CLASS_CLS_METHODS (objc_implementation_context) + : CLASS_NST_METHODS (objc_implementation_context)), + sel_name); + + /* If we haven't found a candidate method by now, try looking for + it in the protocol list. */ + if (!method_prototype && rprotos) + method_prototype + = lookup_method_in_protocol_list (rprotos, sel_name, + class_tree != NULL_TREE); + } + else + { + warning (0, "invalid receiver type %qs", + gen_type_name (orig_rtype)); + /* After issuing the "invalid receiver" warning, perform method + lookup as if we were messaging 'id'. */ + rtype = rprotos = NULL_TREE; + } + } + + + /* For 'id' or 'Class' receivers, search in the global hash table + as a last resort. For all receivers, warn if protocol searches + have failed. */ + if (!method_prototype) + { + if (rprotos) + warning (0, "%<%c%s%> not found in protocol(s)", + (class_tree ? '+' : '-'), + IDENTIFIER_POINTER (sel_name)); + + if (!rtype) + method_prototype + = lookup_method_in_hash_lists (sel_name, class_tree != NULL_TREE); + } + + if (!method_prototype) + { + static bool warn_missing_methods = false; + + if (rtype) + warning (0, "%qs may not respond to %<%c%s%>", + IDENTIFIER_POINTER (OBJC_TYPE_NAME (rtype)), + (class_tree ? '+' : '-'), + IDENTIFIER_POINTER (sel_name)); + /* If we are messaging an 'id' or 'Class' object and made it here, + then we have failed to find _any_ instance or class method, + respectively. */ + else + warning (0, "no %<%c%s%> method found", + (class_tree ? '+' : '-'), + IDENTIFIER_POINTER (sel_name)); + + if (!warn_missing_methods) + { + warning (0, "(Messages without a matching method signature"); + warning (0, "will be assumed to return %<id%> and accept"); + warning (0, "%<...%> as arguments.)"); + warn_missing_methods = true; + } + } + + /* Save the selector name for printing error messages. */ + current_objc_message_selector = sel_name; + + /* Build the parameters list for looking up the method. + These are the object itself and the selector. */ + + if (flag_typed_selectors) + selector = build_typed_selector_reference (sel_name, method_prototype); + else + selector = build_selector_reference (sel_name); + + retval = build_objc_method_call (super, method_prototype, + receiver, + selector, method_params); + + current_objc_message_selector = 0; + + return retval; +} + +/* Build a tree expression to send OBJECT the operation SELECTOR, + looking up the method on object LOOKUP_OBJECT (often same as OBJECT), + assuming the method has prototype METHOD_PROTOTYPE. + (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.) + Use METHOD_PARAMS as list of args to pass to the method. + If SUPER_FLAG is nonzero, we look up the superclass's method. */ + +static tree +build_objc_method_call (int super_flag, tree method_prototype, + tree lookup_object, tree selector, + tree method_params) +{ + tree sender = (super_flag ? umsg_super_decl : + (!flag_next_runtime || flag_nil_receivers + ? (flag_objc_direct_dispatch + ? umsg_fast_decl + : umsg_decl) + : umsg_nonnil_decl)); + tree rcv_p = (super_flag ? objc_super_type : objc_object_type); + + /* If a prototype for the method to be called exists, then cast + the sender's return type and arguments to match that of the method. + Otherwise, leave sender as is. */ + tree ret_type + = (method_prototype + ? TREE_VALUE (TREE_TYPE (method_prototype)) + : objc_object_type); + tree sender_cast + = build_pointer_type + (build_function_type + (ret_type, + get_arg_type_list + (method_prototype, METHOD_REF, super_flag))); + tree method, t; + + lookup_object = build_c_cast (rcv_p, lookup_object); + + /* Use SAVE_EXPR to avoid evaluating the receiver twice. */ + lookup_object = save_expr (lookup_object); + + if (flag_next_runtime) + { + /* If we are returning a struct in memory, and the address + of that memory location is passed as a hidden first + argument, then change which messenger entry point this + expr will call. NB: Note that sender_cast remains + unchanged (it already has a struct return type). */ + if (!targetm.calls.struct_value_rtx (0, 0) + && (TREE_CODE (ret_type) == RECORD_TYPE + || TREE_CODE (ret_type) == UNION_TYPE) + && targetm.calls.return_in_memory (ret_type, 0)) + sender = (super_flag ? umsg_super_stret_decl : + flag_nil_receivers ? umsg_stret_decl : umsg_nonnil_stret_decl); + + method_params = tree_cons (NULL_TREE, lookup_object, + tree_cons (NULL_TREE, selector, + method_params)); + method = build_fold_addr_expr (sender); + } + else + { + /* This is the portable (GNU) way. */ + tree object; + + /* First, call the lookup function to get a pointer to the method, + then cast the pointer, then call it with the method arguments. */ + + object = (super_flag ? self_decl : lookup_object); + + t = tree_cons (NULL_TREE, selector, NULL_TREE); + t = tree_cons (NULL_TREE, lookup_object, t); + method = build_function_call (sender, t); + + /* Pass the object to the method. */ + method_params = tree_cons (NULL_TREE, object, + tree_cons (NULL_TREE, selector, + method_params)); + } + + /* ??? Selector is not at this point something we can use inside + the compiler itself. Set it to garbage for the nonce. */ + t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, size_zero_node); + return build_function_call (t, method_params); +} + +static void +build_protocol_reference (tree p) +{ + tree decl; + const char *proto_name; + + /* static struct _objc_protocol _OBJC_PROTOCOL_<mumble>; */ + + proto_name = synth_id_with_class_suffix ("_OBJC_PROTOCOL", p); + decl = start_var_decl (objc_protocol_template, proto_name); + + PROTOCOL_FORWARD_DECL (p) = decl; +} + +/* This function is called by the parser when (and only when) a + @protocol() expression is found, in order to compile it. */ +tree +objc_build_protocol_expr (tree protoname) +{ + tree expr; + tree p = lookup_protocol (protoname); + + if (!p) + { + error ("cannot find protocol declaration for %qs", + IDENTIFIER_POINTER (protoname)); + return error_mark_node; + } + + if (!PROTOCOL_FORWARD_DECL (p)) + build_protocol_reference (p); + + expr = build_unary_op (ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0); + + /* ??? Ideally we'd build the reference with objc_protocol_type directly, + if we have it, rather than converting it here. */ + expr = convert (objc_protocol_type, expr); + + /* The @protocol() expression is being compiled into a pointer to a + statically allocated instance of the Protocol class. To become + usable at runtime, the 'isa' pointer of the instance need to be + fixed up at runtime by the runtime library, to point to the + actual 'Protocol' class. */ + + /* For the GNU runtime, put the static Protocol instance in the list + of statically allocated instances, so that we make sure that its + 'isa' pointer is fixed up at runtime by the GNU runtime library + to point to the Protocol class (at runtime, when loading the + module, the GNU runtime library loops on the statically allocated + instances (as found in the defs field in objc_symtab) and fixups + all the 'isa' pointers of those objects). */ + if (! flag_next_runtime) + { + /* This type is a struct containing the fields of a Protocol + object. (Cfr. objc_protocol_type instead is the type of a pointer + to such a struct). */ + tree protocol_struct_type = xref_tag + (RECORD_TYPE, get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); + tree *chain; + + /* Look for the list of Protocol statically allocated instances + to fixup at runtime. Create a new list to hold Protocol + statically allocated instances, if the list is not found. At + present there is only another list, holding NSConstantString + static instances to be fixed up at runtime. */ + for (chain = &objc_static_instances; + *chain && TREE_VALUE (*chain) != protocol_struct_type; + chain = &TREE_CHAIN (*chain)); + if (!*chain) + { + *chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE); + add_objc_string (OBJC_TYPE_NAME (protocol_struct_type), + class_names); + } + + /* Add this statically allocated instance to the Protocol list. */ + TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, + PROTOCOL_FORWARD_DECL (p), + TREE_PURPOSE (*chain)); + } + + + return expr; +} + +/* This function is called by the parser when a @selector() expression + is found, in order to compile it. It is only called by the parser + and only to compile a @selector(). */ +tree +objc_build_selector_expr (tree selnamelist) +{ + tree selname; + + /* Obtain the full selector name. */ + if (TREE_CODE (selnamelist) == IDENTIFIER_NODE) + /* A unary selector. */ + selname = selnamelist; + else if (TREE_CODE (selnamelist) == TREE_LIST) + selname = build_keyword_selector (selnamelist); + else + abort (); + + /* If we are required to check @selector() expressions as they + are found, check that the selector has been declared. */ + if (warn_undeclared_selector) + { + /* Look the selector up in the list of all known class and + instance methods (up to this line) to check that the selector + exists. */ + hash hsh; + + /* First try with instance methods. */ + hsh = hash_lookup (nst_method_hash_list, selname); + + /* If not found, try with class methods. */ + if (!hsh) + { + hsh = hash_lookup (cls_method_hash_list, selname); + } + + /* If still not found, print out a warning. */ + if (!hsh) + { + warning (0, "undeclared selector %qs", IDENTIFIER_POINTER (selname)); + } + } + + + if (flag_typed_selectors) + return build_typed_selector_reference (selname, 0); + else + return build_selector_reference (selname); +} + +tree +objc_build_encode_expr (tree type) +{ + tree result; + const char *string; + + encode_type (type, obstack_object_size (&util_obstack), + OBJC_ENCODE_INLINE_DEFS); + obstack_1grow (&util_obstack, 0); /* null terminate string */ + string = obstack_finish (&util_obstack); + + /* Synthesize a string that represents the encoded struct/union. */ + result = my_build_string (strlen (string) + 1, string); + obstack_free (&util_obstack, util_firstobj); + return result; +} + +static tree +build_ivar_reference (tree id) +{ + if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL) + { + /* Historically, a class method that produced objects (factory + method) would assign `self' to the instance that it + allocated. This would effectively turn the class method into + an instance method. Following this assignment, the instance + variables could be accessed. That practice, while safe, + violates the simple rule that a class method should not refer + to an instance variable. It's better to catch the cases + where this is done unknowingly than to support the above + paradigm. */ + warning (0, "instance variable %qs accessed in class method", + IDENTIFIER_POINTER (id)); + self_decl = convert (objc_instance_type, self_decl); /* cast */ + } + + return objc_build_component_ref (build_indirect_ref (self_decl, "->"), id); +} + +/* Compute a hash value for a given method SEL_NAME. */ + +static size_t +hash_func (tree sel_name) +{ + const unsigned char *s + = (const unsigned char *)IDENTIFIER_POINTER (sel_name); + size_t h = 0; + + while (*s) + h = h * 67 + *s++ - 113; + return h; +} + +static void +hash_init (void) +{ + nst_method_hash_list + = (hash *) ggc_alloc_cleared (SIZEHASHTABLE * sizeof (hash)); + cls_method_hash_list + = (hash *) ggc_alloc_cleared (SIZEHASHTABLE * sizeof (hash)); + + /* Initialize the hash table used to hold the constant string objects. */ + string_htab = htab_create_ggc (31, string_hash, + string_eq, NULL); + + /* Initialize the hash table used to hold EH-volatilized types. */ + volatilized_htab = htab_create_ggc (31, volatilized_hash, + volatilized_eq, NULL); +} + +/* WARNING!!!! hash_enter is called with a method, and will peek + inside to find its selector! But hash_lookup is given a selector + directly, and looks for the selector that's inside the found + entry's key (method) for comparison. */ + +static void +hash_enter (hash *hashlist, tree method) +{ + hash obj; + int slot = hash_func (METHOD_SEL_NAME (method)) % SIZEHASHTABLE; + + obj = (hash) ggc_alloc (sizeof (struct hashed_entry)); + obj->list = 0; + obj->next = hashlist[slot]; + obj->key = method; + + hashlist[slot] = obj; /* append to front */ +} + +static hash +hash_lookup (hash *hashlist, tree sel_name) +{ + hash target; + + target = hashlist[hash_func (sel_name) % SIZEHASHTABLE]; + + while (target) + { + if (sel_name == METHOD_SEL_NAME (target->key)) + return target; + + target = target->next; + } + return 0; +} + +static void +hash_add_attr (hash entry, tree value) +{ + attr obj; + + obj = (attr) ggc_alloc (sizeof (struct hashed_attribute)); + obj->next = entry->list; + obj->value = value; + + entry->list = obj; /* append to front */ +} + +static tree +lookup_method (tree mchain, tree method) +{ + tree key; + + if (TREE_CODE (method) == IDENTIFIER_NODE) + key = method; + else + key = METHOD_SEL_NAME (method); + + while (mchain) + { + if (METHOD_SEL_NAME (mchain) == key) + return mchain; + + mchain = TREE_CHAIN (mchain); + } + return NULL_TREE; +} + +/* Look up a class (if OBJC_LOOKUP_CLASS is set in FLAGS) or instance method + in INTERFACE, along with any categories and protocols attached thereto. + If method is not found, and the OBJC_LOOKUP_NO_SUPER is _not_ set in FLAGS, + recursively examine the INTERFACE's superclass. If OBJC_LOOKUP_CLASS is + set, OBJC_LOOKUP_NO_SUPER is cleared, and no suitable class method could + be found in INTERFACE or any of its superclasses, look for an _instance_ + method of the same name in the root class as a last resort. + + If a suitable method cannot be found, return NULL_TREE. */ + +static tree +lookup_method_static (tree interface, tree ident, int flags) +{ + tree meth = NULL_TREE, root_inter = NULL_TREE; + tree inter = interface; + int is_class = (flags & OBJC_LOOKUP_CLASS); + int no_superclasses = (flags & OBJC_LOOKUP_NO_SUPER); + + while (inter) + { + tree chain = is_class ? CLASS_CLS_METHODS (inter) : CLASS_NST_METHODS (inter); + tree category = inter; + + /* First, look up the method in the class itself. */ + if ((meth = lookup_method (chain, ident))) + return meth; + + /* Failing that, look for the method in each category of the class. */ + while ((category = CLASS_CATEGORY_LIST (category))) + { + chain = is_class ? CLASS_CLS_METHODS (category) : CLASS_NST_METHODS (category); + + /* Check directly in each category. */ + if ((meth = lookup_method (chain, ident))) + return meth; + + /* Failing that, check in each category's protocols. */ + if (CLASS_PROTOCOL_LIST (category)) + { + if ((meth = (lookup_method_in_protocol_list + (CLASS_PROTOCOL_LIST (category), ident, is_class)))) + return meth; + } + } + + /* If not found in categories, check in protocols of the main class. */ + if (CLASS_PROTOCOL_LIST (inter)) + { + if ((meth = (lookup_method_in_protocol_list + (CLASS_PROTOCOL_LIST (inter), ident, is_class)))) + return meth; + } + + /* If we were instructed not to look in superclasses, don't. */ + if (no_superclasses) + return NULL_TREE; + + /* Failing that, climb up the inheritance hierarchy. */ + root_inter = inter; + inter = lookup_interface (CLASS_SUPER_NAME (inter)); + } + while (inter); + + /* If no class (factory) method was found, check if an _instance_ + method of the same name exists in the root class. This is what + the Objective-C runtime will do. If an instance method was not + found, return 0. */ + return is_class ? lookup_method_static (root_inter, ident, 0): NULL_TREE; +} + +/* Add the method to the hash list if it doesn't contain an identical + method already. */ + +static void +add_method_to_hash_list (hash *hash_list, tree method) +{ + hash hsh; + + if (!(hsh = hash_lookup (hash_list, METHOD_SEL_NAME (method)))) + { + /* Install on a global chain. */ + hash_enter (hash_list, method); + } + else + { + /* Check types against those; if different, add to a list. */ + attr loop; + int already_there = comp_proto_with_proto (method, hsh->key, 1); + for (loop = hsh->list; !already_there && loop; loop = loop->next) + already_there |= comp_proto_with_proto (method, loop->value, 1); + if (!already_there) + hash_add_attr (hsh, method); + } +} + +static tree +objc_add_method (tree class, tree method, int is_class) +{ + tree mth; + + if (!(mth = lookup_method (is_class + ? CLASS_CLS_METHODS (class) + : CLASS_NST_METHODS (class), method))) + { + /* put method on list in reverse order */ + if (is_class) + { + TREE_CHAIN (method) = CLASS_CLS_METHODS (class); + CLASS_CLS_METHODS (class) = method; + } + else + { + TREE_CHAIN (method) = CLASS_NST_METHODS (class); + CLASS_NST_METHODS (class) = method; + } + } + else + { + /* When processing an @interface for a class or category, give hard + errors on methods with identical selectors but differing argument + and/or return types. We do not do this for @implementations, because + C/C++ will do it for us (i.e., there will be duplicate function + definition errors). */ + if ((TREE_CODE (class) == CLASS_INTERFACE_TYPE + || TREE_CODE (class) == CATEGORY_INTERFACE_TYPE) + && !comp_proto_with_proto (method, mth, 1)) + error ("duplicate declaration of method %<%c%s%>", + is_class ? '+' : '-', + IDENTIFIER_POINTER (METHOD_SEL_NAME (mth))); + } + + if (is_class) + add_method_to_hash_list (cls_method_hash_list, method); + else + { + add_method_to_hash_list (nst_method_hash_list, method); + + /* Instance methods in root classes (and categories thereof) + may act as class methods as a last resort. We also add + instance methods listed in @protocol declarations to + the class hash table, on the assumption that @protocols + may be adopted by root classes or categories. */ + if (TREE_CODE (class) == CATEGORY_INTERFACE_TYPE + || TREE_CODE (class) == CATEGORY_IMPLEMENTATION_TYPE) + class = lookup_interface (CLASS_NAME (class)); + + if (TREE_CODE (class) == PROTOCOL_INTERFACE_TYPE + || !CLASS_SUPER_NAME (class)) + add_method_to_hash_list (cls_method_hash_list, method); + } + + return method; +} + +static tree +add_class (tree class_name, tree name) +{ + struct interface_tuple **slot; + + /* Put interfaces on list in reverse order. */ + TREE_CHAIN (class_name) = interface_chain; + interface_chain = class_name; + + if (interface_htab == NULL) + interface_htab = htab_create_ggc (31, hash_interface, eq_interface, NULL); + slot = (struct interface_tuple **) + htab_find_slot_with_hash (interface_htab, name, + IDENTIFIER_HASH_VALUE (name), + INSERT); + if (!*slot) + { + *slot = (struct interface_tuple *) ggc_alloc_cleared (sizeof (struct interface_tuple)); + (*slot)->id = name; + } + (*slot)->class_name = class_name; + + return interface_chain; +} + +static void +add_category (tree class, tree category) +{ + /* Put categories on list in reverse order. */ + tree cat = lookup_category (class, CLASS_SUPER_NAME (category)); + + if (cat) + { + warning (0, "duplicate interface declaration for category %<%s(%s)%>", + IDENTIFIER_POINTER (CLASS_NAME (class)), + IDENTIFIER_POINTER (CLASS_SUPER_NAME (category))); + } + else + { + CLASS_CATEGORY_LIST (category) = CLASS_CATEGORY_LIST (class); + CLASS_CATEGORY_LIST (class) = category; + } +} + +/* Called after parsing each instance variable declaration. Necessary to + preserve typedefs and implement public/private... + + PUBLIC is 1 for public, 0 for protected, and 2 for private. */ + +static tree +add_instance_variable (tree class, int public, tree field_decl) +{ + tree field_type = TREE_TYPE (field_decl); + const char *ivar_name = DECL_NAME (field_decl) + ? IDENTIFIER_POINTER (DECL_NAME (field_decl)) + : "<unnamed>"; + +#ifdef OBJCPLUS + if (TREE_CODE (field_type) == REFERENCE_TYPE) + { + error ("illegal reference type specified for instance variable %qs", + ivar_name); + /* Return class as is without adding this ivar. */ + return class; + } +#endif + + if (field_type == error_mark_node || !TYPE_SIZE (field_type) + || TYPE_SIZE (field_type) == error_mark_node) + /* 'type[0]' is allowed, but 'type[]' is not! */ + { + error ("instance variable %qs has unknown size", ivar_name); + /* Return class as is without adding this ivar. */ + return class; + } + +#ifdef OBJCPLUS + /* Check if the ivar being added has a non-POD C++ type. If so, we will + need to either (1) warn the user about it or (2) generate suitable + constructor/destructor call from '- .cxx_construct' or '- .cxx_destruct' + methods (if '-fobjc-call-cxx-cdtors' was specified). */ + if (IS_AGGR_TYPE (field_type) + && (TYPE_NEEDS_CONSTRUCTING (field_type) + || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type) + || TYPE_POLYMORPHIC_P (field_type))) + { + const char *type_name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (field_type)); + + if (flag_objc_call_cxx_cdtors) + { + /* Since the ObjC runtime will be calling the constructors and + destructors for us, the only thing we can't handle is the lack + of a default constructor. */ + if (TYPE_NEEDS_CONSTRUCTING (field_type) + && !TYPE_HAS_DEFAULT_CONSTRUCTOR (field_type)) + { + warning (0, "type %qs has no default constructor to call", + type_name); + + /* If we cannot call a constructor, we should also avoid + calling the destructor, for symmetry. */ + if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)) + warning (0, "destructor for %qs shall not be run either", + type_name); + } + } + else + { + static bool warn_cxx_ivars = false; + + if (TYPE_POLYMORPHIC_P (field_type)) + { + /* Vtable pointers are Real Bad(tm), since Obj-C cannot + initialize them. */ + error ("type %qs has virtual member functions", type_name); + error ("illegal aggregate type %qs specified " + "for instance variable %qs", + type_name, ivar_name); + /* Return class as is without adding this ivar. */ + return class; + } + + /* User-defined constructors and destructors are not known to Obj-C + and hence will not be called. This may or may not be a problem. */ + if (TYPE_NEEDS_CONSTRUCTING (field_type)) + warning (0, "type %qs has a user-defined constructor", type_name); + if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)) + warning (0, "type %qs has a user-defined destructor", type_name); + + if (!warn_cxx_ivars) + { + warning (0, "C++ constructors and destructors will not " + "be invoked for Objective-C fields"); + warn_cxx_ivars = true; + } + } + } +#endif + + /* Overload the public attribute, it is not used for FIELD_DECLs. */ + switch (public) + { + case 0: + TREE_PUBLIC (field_decl) = 0; + TREE_PRIVATE (field_decl) = 0; + TREE_PROTECTED (field_decl) = 1; + break; + + case 1: + TREE_PUBLIC (field_decl) = 1; + TREE_PRIVATE (field_decl) = 0; + TREE_PROTECTED (field_decl) = 0; + break; + + case 2: + TREE_PUBLIC (field_decl) = 0; + TREE_PRIVATE (field_decl) = 1; + TREE_PROTECTED (field_decl) = 0; + break; + + } + + CLASS_RAW_IVARS (class) = chainon (CLASS_RAW_IVARS (class), field_decl); + + return class; +} + +static tree +is_ivar (tree decl_chain, tree ident) +{ + for ( ; decl_chain; decl_chain = TREE_CHAIN (decl_chain)) + if (DECL_NAME (decl_chain) == ident) + return decl_chain; + return NULL_TREE; +} + +/* True if the ivar is private and we are not in its implementation. */ + +static int +is_private (tree decl) +{ + return (TREE_PRIVATE (decl) + && ! is_ivar (CLASS_IVARS (implementation_template), + DECL_NAME (decl))); +} + +/* We have an instance variable reference;, check to see if it is public. */ + +int +objc_is_public (tree expr, tree identifier) +{ + tree basetype, decl; + +#ifdef OBJCPLUS + if (processing_template_decl) + return 1; +#endif + + if (TREE_TYPE (expr) == error_mark_node) + return 1; + + basetype = TYPE_MAIN_VARIANT (TREE_TYPE (expr)); + + if (basetype && TREE_CODE (basetype) == RECORD_TYPE) + { + if (TYPE_HAS_OBJC_INFO (basetype) && TYPE_OBJC_INTERFACE (basetype)) + { + tree class = lookup_interface (OBJC_TYPE_NAME (basetype)); + + if (!class) + { + error ("cannot find interface declaration for %qs", + IDENTIFIER_POINTER (OBJC_TYPE_NAME (basetype))); + return 0; + } + + if ((decl = is_ivar (get_class_ivars (class, true), identifier))) + { + if (TREE_PUBLIC (decl)) + return 1; + + /* Important difference between the Stepstone translator: + all instance variables should be public within the context + of the implementation. */ + if (objc_implementation_context + && ((TREE_CODE (objc_implementation_context) + == CLASS_IMPLEMENTATION_TYPE) + || (TREE_CODE (objc_implementation_context) + == CATEGORY_IMPLEMENTATION_TYPE))) + { + tree curtype = TYPE_MAIN_VARIANT + (CLASS_STATIC_TEMPLATE + (implementation_template)); + + if (basetype == curtype + || DERIVED_FROM_P (basetype, curtype)) + { + int private = is_private (decl); + + if (private) + error ("instance variable %qs is declared private", + IDENTIFIER_POINTER (DECL_NAME (decl))); + + return !private; + } + } + + /* The 2.95.2 compiler sometimes allowed C functions to access + non-@public ivars. We will let this slide for now... */ + if (!objc_method_context) + { + warning (0, "instance variable %qs is %s; " + "this will be a hard error in the future", + IDENTIFIER_POINTER (identifier), + TREE_PRIVATE (decl) ? "@private" : "@protected"); + return 1; + } + + error ("instance variable %qs is declared %s", + IDENTIFIER_POINTER (identifier), + TREE_PRIVATE (decl) ? "private" : "protected"); + return 0; + } + } + } + + return 1; +} + +/* Make sure all entries in CHAIN are also in LIST. */ + +static int +check_methods (tree chain, tree list, int mtype) +{ + int first = 1; + + while (chain) + { + if (!lookup_method (list, chain)) + { + if (first) + { + if (TREE_CODE (objc_implementation_context) + == CLASS_IMPLEMENTATION_TYPE) + warning (0, "incomplete implementation of class %qs", + IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context))); + else if (TREE_CODE (objc_implementation_context) + == CATEGORY_IMPLEMENTATION_TYPE) + warning (0, "incomplete implementation of category %qs", + IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context))); + first = 0; + } + + warning (0, "method definition for %<%c%s%> not found", + mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain))); + } + + chain = TREE_CHAIN (chain); + } + + return first; +} + +/* Check if CLASS, or its superclasses, explicitly conforms to PROTOCOL. */ + +static int +conforms_to_protocol (tree class, tree protocol) +{ + if (TREE_CODE (protocol) == PROTOCOL_INTERFACE_TYPE) + { + tree p = CLASS_PROTOCOL_LIST (class); + while (p && TREE_VALUE (p) != protocol) + p = TREE_CHAIN (p); + + if (!p) + { + tree super = (CLASS_SUPER_NAME (class) + ? lookup_interface (CLASS_SUPER_NAME (class)) + : NULL_TREE); + int tmp = super ? conforms_to_protocol (super, protocol) : 0; + if (!tmp) + return 0; + } + } + + return 1; +} + +/* Make sure all methods in CHAIN are accessible as MTYPE methods in + CONTEXT. This is one of two mechanisms to check protocol integrity. */ + +static int +check_methods_accessible (tree chain, tree context, int mtype) +{ + int first = 1; + tree list; + tree base_context = context; + + while (chain) + { + context = base_context; + while (context) + { + if (mtype == '+') + list = CLASS_CLS_METHODS (context); + else + list = CLASS_NST_METHODS (context); + + if (lookup_method (list, chain)) + break; + + else if (TREE_CODE (context) == CLASS_IMPLEMENTATION_TYPE + || TREE_CODE (context) == CLASS_INTERFACE_TYPE) + context = (CLASS_SUPER_NAME (context) + ? lookup_interface (CLASS_SUPER_NAME (context)) + : NULL_TREE); + + else if (TREE_CODE (context) == CATEGORY_IMPLEMENTATION_TYPE + || TREE_CODE (context) == CATEGORY_INTERFACE_TYPE) + context = (CLASS_NAME (context) + ? lookup_interface (CLASS_NAME (context)) + : NULL_TREE); + else + abort (); + } + + if (context == NULL_TREE) + { + if (first) + { + if (TREE_CODE (objc_implementation_context) + == CLASS_IMPLEMENTATION_TYPE) + warning (0, "incomplete implementation of class %qs", + IDENTIFIER_POINTER + (CLASS_NAME (objc_implementation_context))); + else if (TREE_CODE (objc_implementation_context) + == CATEGORY_IMPLEMENTATION_TYPE) + warning (0, "incomplete implementation of category %qs", + IDENTIFIER_POINTER + (CLASS_SUPER_NAME (objc_implementation_context))); + first = 0; + } + warning (0, "method definition for %<%c%s%> not found", + mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain))); + } + + chain = TREE_CHAIN (chain); /* next method... */ + } + return first; +} + +/* Check whether the current interface (accessible via + 'objc_implementation_context') actually implements protocol P, along + with any protocols that P inherits. */ + +static void +check_protocol (tree p, const char *type, const char *name) +{ + if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE) + { + int f1, f2; + + /* Ensure that all protocols have bodies! */ + if (warn_protocol) + { + f1 = check_methods (PROTOCOL_CLS_METHODS (p), + CLASS_CLS_METHODS (objc_implementation_context), + '+'); + f2 = check_methods (PROTOCOL_NST_METHODS (p), + CLASS_NST_METHODS (objc_implementation_context), + '-'); + } + else + { + f1 = check_methods_accessible (PROTOCOL_CLS_METHODS (p), + objc_implementation_context, + '+'); + f2 = check_methods_accessible (PROTOCOL_NST_METHODS (p), + objc_implementation_context, + '-'); + } + + if (!f1 || !f2) + warning (0, "%s %qs does not fully implement the %qs protocol", + type, name, IDENTIFIER_POINTER (PROTOCOL_NAME (p))); + } + + /* Check protocols recursively. */ + if (PROTOCOL_LIST (p)) + { + tree subs = PROTOCOL_LIST (p); + tree super_class = + lookup_interface (CLASS_SUPER_NAME (implementation_template)); + + while (subs) + { + tree sub = TREE_VALUE (subs); + + /* If the superclass does not conform to the protocols + inherited by P, then we must! */ + if (!super_class || !conforms_to_protocol (super_class, sub)) + check_protocol (sub, type, name); + subs = TREE_CHAIN (subs); + } + } +} + +/* Check whether the current interface (accessible via + 'objc_implementation_context') actually implements the protocols listed + in PROTO_LIST. */ + +static void +check_protocols (tree proto_list, const char *type, const char *name) +{ + for ( ; proto_list; proto_list = TREE_CHAIN (proto_list)) + { + tree p = TREE_VALUE (proto_list); + + check_protocol (p, type, name); + } +} + +/* Make sure that the class CLASS_NAME is defined + CODE says which kind of thing CLASS_NAME ought to be. + It can be CLASS_INTERFACE_TYPE, CLASS_IMPLEMENTATION_TYPE, + CATEGORY_INTERFACE_TYPE, or CATEGORY_IMPLEMENTATION_TYPE. */ + +static tree +start_class (enum tree_code code, tree class_name, tree super_name, + tree protocol_list) +{ + tree class, decl; + +#ifdef OBJCPLUS + if (current_namespace != global_namespace) { + error ("Objective-C declarations may only appear in global scope"); + } +#endif /* OBJCPLUS */ + + if (objc_implementation_context) + { + warning (0, "%<@end%> missing in implementation context"); + finish_class (objc_implementation_context); + objc_ivar_chain = NULL_TREE; + objc_implementation_context = NULL_TREE; + } + + class = make_node (code); + TYPE_LANG_SLOT_1 (class) = make_tree_vec (CLASS_LANG_SLOT_ELTS); + + /* Check for existence of the super class, if one was specified. Note + that we must have seen an @interface, not just a @class. If we + are looking at a @compatibility_alias, traverse it first. */ + if ((code == CLASS_INTERFACE_TYPE || code == CLASS_IMPLEMENTATION_TYPE) + && super_name) + { + tree super = objc_is_class_name (super_name); + + if (!super || !lookup_interface (super)) + { + error ("cannot find interface declaration for %qs, superclass of %qs", + IDENTIFIER_POINTER (super ? super : super_name), + IDENTIFIER_POINTER (class_name)); + super_name = NULL_TREE; + } + else + super_name = super; + } + + CLASS_NAME (class) = class_name; + CLASS_SUPER_NAME (class) = super_name; + CLASS_CLS_METHODS (class) = NULL_TREE; + + if (! objc_is_class_name (class_name) + && (decl = lookup_name (class_name))) + { + error ("%qs redeclared as different kind of symbol", + IDENTIFIER_POINTER (class_name)); + error ("previous declaration of %q+D", + decl); + } + + if (code == CLASS_IMPLEMENTATION_TYPE) + { + { + tree chain; + + for (chain = implemented_classes; chain; chain = TREE_CHAIN (chain)) + if (TREE_VALUE (chain) == class_name) + { + error ("reimplementation of class %qs", + IDENTIFIER_POINTER (class_name)); + return error_mark_node; + } + implemented_classes = tree_cons (NULL_TREE, class_name, + implemented_classes); + } + + /* Reset for multiple classes per file. */ + method_slot = 0; + + objc_implementation_context = class; + + /* Lookup the interface for this implementation. */ + + if (!(implementation_template = lookup_interface (class_name))) + { + warning (0, "cannot find interface declaration for %qs", + IDENTIFIER_POINTER (class_name)); + add_class (implementation_template = objc_implementation_context, + class_name); + } + + /* If a super class has been specified in the implementation, + insure it conforms to the one specified in the interface. */ + + if (super_name + && (super_name != CLASS_SUPER_NAME (implementation_template))) + { + tree previous_name = CLASS_SUPER_NAME (implementation_template); + const char *const name = + previous_name ? IDENTIFIER_POINTER (previous_name) : ""; + error ("conflicting super class name %qs", + IDENTIFIER_POINTER (super_name)); + error ("previous declaration of %qs", name); + } + + else if (! super_name) + { + CLASS_SUPER_NAME (objc_implementation_context) + = CLASS_SUPER_NAME (implementation_template); + } + } + + else if (code == CLASS_INTERFACE_TYPE) + { + if (lookup_interface (class_name)) +#ifdef OBJCPLUS + error ("duplicate interface declaration for class %qs", +#else + warning (0, "duplicate interface declaration for class %qs", +#endif + IDENTIFIER_POINTER (class_name)); + else + add_class (class, class_name); + + if (protocol_list) + CLASS_PROTOCOL_LIST (class) + = lookup_and_install_protocols (protocol_list); + } + + else if (code == CATEGORY_INTERFACE_TYPE) + { + tree class_category_is_assoc_with; + + /* For a category, class_name is really the name of the class that + the following set of methods will be associated with. We must + find the interface so that can derive the objects template. */ + + if (!(class_category_is_assoc_with = lookup_interface (class_name))) + { + error ("cannot find interface declaration for %qs", + IDENTIFIER_POINTER (class_name)); + exit (FATAL_EXIT_CODE); + } + else + add_category (class_category_is_assoc_with, class); + + if (protocol_list) + CLASS_PROTOCOL_LIST (class) + = lookup_and_install_protocols (protocol_list); + } + + else if (code == CATEGORY_IMPLEMENTATION_TYPE) + { + /* Reset for multiple classes per file. */ + method_slot = 0; + + objc_implementation_context = class; + + /* For a category, class_name is really the name of the class that + the following set of methods will be associated with. We must + find the interface so that can derive the objects template. */ + + if (!(implementation_template = lookup_interface (class_name))) + { + error ("cannot find interface declaration for %qs", + IDENTIFIER_POINTER (class_name)); + exit (FATAL_EXIT_CODE); + } + } + return class; +} + +static tree +continue_class (tree class) +{ + if (TREE_CODE (class) == CLASS_IMPLEMENTATION_TYPE + || TREE_CODE (class) == CATEGORY_IMPLEMENTATION_TYPE) + { + struct imp_entry *imp_entry; + + /* Check consistency of the instance variables. */ + + if (CLASS_RAW_IVARS (class)) + check_ivars (implementation_template, class); + + /* code generation */ + +#ifdef OBJCPLUS + push_lang_context (lang_name_c); +#endif + + build_private_template (implementation_template); + uprivate_record = CLASS_STATIC_TEMPLATE (implementation_template); + objc_instance_type = build_pointer_type (uprivate_record); + + imp_entry = (struct imp_entry *) ggc_alloc (sizeof (struct imp_entry)); + + imp_entry->next = imp_list; + imp_entry->imp_context = class; + imp_entry->imp_template = implementation_template; + + synth_forward_declarations (); + imp_entry->class_decl = UOBJC_CLASS_decl; + imp_entry->meta_decl = UOBJC_METACLASS_decl; + imp_entry->has_cxx_cdtors = 0; + + /* Append to front and increment count. */ + imp_list = imp_entry; + if (TREE_CODE (class) == CLASS_IMPLEMENTATION_TYPE) + imp_count++; + else + cat_count++; + +#ifdef OBJCPLUS + pop_lang_context (); +#endif /* OBJCPLUS */ + + return get_class_ivars (implementation_template, true); + } + + else if (TREE_CODE (class) == CLASS_INTERFACE_TYPE) + { +#ifdef OBJCPLUS + push_lang_context (lang_name_c); +#endif /* OBJCPLUS */ + + build_private_template (class); + +#ifdef OBJCPLUS + pop_lang_context (); +#endif /* OBJCPLUS */ + + return NULL_TREE; + } + + else + return error_mark_node; +} + +/* This is called once we see the "@end" in an interface/implementation. */ + +static void +finish_class (tree class) +{ + if (TREE_CODE (class) == CLASS_IMPLEMENTATION_TYPE) + { + /* All code generation is done in finish_objc. */ + + if (implementation_template != objc_implementation_context) + { + /* Ensure that all method listed in the interface contain bodies. */ + check_methods (CLASS_CLS_METHODS (implementation_template), + CLASS_CLS_METHODS (objc_implementation_context), '+'); + check_methods (CLASS_NST_METHODS (implementation_template), + CLASS_NST_METHODS (objc_implementation_context), '-'); + + if (CLASS_PROTOCOL_LIST (implementation_template)) + check_protocols (CLASS_PROTOCOL_LIST (implementation_template), + "class", + IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context))); + } + } + + else if (TREE_CODE (class) == CATEGORY_IMPLEMENTATION_TYPE) + { + tree category = lookup_category (implementation_template, CLASS_SUPER_NAME (class)); + + if (category) + { + /* Ensure all method listed in the interface contain bodies. */ + check_methods (CLASS_CLS_METHODS (category), + CLASS_CLS_METHODS (objc_implementation_context), '+'); + check_methods (CLASS_NST_METHODS (category), + CLASS_NST_METHODS (objc_implementation_context), '-'); + + if (CLASS_PROTOCOL_LIST (category)) + check_protocols (CLASS_PROTOCOL_LIST (category), + "category", + IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context))); + } + } +} + +static tree +add_protocol (tree protocol) +{ + /* Put protocol on list in reverse order. */ + TREE_CHAIN (protocol) = protocol_chain; + protocol_chain = protocol; + return protocol_chain; +} + +static tree +lookup_protocol (tree ident) +{ + tree chain; + + for (chain = protocol_chain; chain; chain = TREE_CHAIN (chain)) + if (ident == PROTOCOL_NAME (chain)) + return chain; + + return NULL_TREE; +} + +/* This function forward declares the protocols named by NAMES. If + they are already declared or defined, the function has no effect. */ + +void +objc_declare_protocols (tree names) +{ + tree list; + +#ifdef OBJCPLUS + if (current_namespace != global_namespace) { + error ("Objective-C declarations may only appear in global scope"); + } +#endif /* OBJCPLUS */ + + for (list = names; list; list = TREE_CHAIN (list)) + { + tree name = TREE_VALUE (list); + + if (lookup_protocol (name) == NULL_TREE) + { + tree protocol = make_node (PROTOCOL_INTERFACE_TYPE); + + TYPE_LANG_SLOT_1 (protocol) + = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS); + PROTOCOL_NAME (protocol) = name; + PROTOCOL_LIST (protocol) = NULL_TREE; + add_protocol (protocol); + PROTOCOL_DEFINED (protocol) = 0; + PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE; + } + } +} + +static tree +start_protocol (enum tree_code code, tree name, tree list) +{ + tree protocol; + +#ifdef OBJCPLUS + if (current_namespace != global_namespace) { + error ("Objective-C declarations may only appear in global scope"); + } +#endif /* OBJCPLUS */ + + protocol = lookup_protocol (name); + + if (!protocol) + { + protocol = make_node (code); + TYPE_LANG_SLOT_1 (protocol) = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS); + + PROTOCOL_NAME (protocol) = name; + PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list); + add_protocol (protocol); + PROTOCOL_DEFINED (protocol) = 1; + PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE; + + check_protocol_recursively (protocol, list); + } + else if (! PROTOCOL_DEFINED (protocol)) + { + PROTOCOL_DEFINED (protocol) = 1; + PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list); + + check_protocol_recursively (protocol, list); + } + else + { + warning (0, "duplicate declaration for protocol %qs", + IDENTIFIER_POINTER (name)); + } + return protocol; +} + + +/* "Encode" a data type into a string, which grows in util_obstack. + ??? What is the FORMAT? Someone please document this! */ + +static void +encode_type_qualifiers (tree declspecs) +{ + tree spec; + + for (spec = declspecs; spec; spec = TREE_CHAIN (spec)) + { + if (ridpointers[(int) RID_IN] == TREE_VALUE (spec)) + obstack_1grow (&util_obstack, 'n'); + else if (ridpointers[(int) RID_INOUT] == TREE_VALUE (spec)) + obstack_1grow (&util_obstack, 'N'); + else if (ridpointers[(int) RID_OUT] == TREE_VALUE (spec)) + obstack_1grow (&util_obstack, 'o'); + else if (ridpointers[(int) RID_BYCOPY] == TREE_VALUE (spec)) + obstack_1grow (&util_obstack, 'O'); + else if (ridpointers[(int) RID_BYREF] == TREE_VALUE (spec)) + obstack_1grow (&util_obstack, 'R'); + else if (ridpointers[(int) RID_ONEWAY] == TREE_VALUE (spec)) + obstack_1grow (&util_obstack, 'V'); + } +} + +/* Encode a pointer type. */ + +static void +encode_pointer (tree type, int curtype, int format) +{ + tree pointer_to = TREE_TYPE (type); + + if (TREE_CODE (pointer_to) == RECORD_TYPE) + { + if (OBJC_TYPE_NAME (pointer_to) + && TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE) + { + const char *name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (pointer_to)); + + if (strcmp (name, TAG_OBJECT) == 0) /* '@' */ + { + obstack_1grow (&util_obstack, '@'); + return; + } + else if (TYPE_HAS_OBJC_INFO (pointer_to) + && TYPE_OBJC_INTERFACE (pointer_to)) + { + if (generating_instance_variables) + { + obstack_1grow (&util_obstack, '@'); + obstack_1grow (&util_obstack, '"'); + obstack_grow (&util_obstack, name, strlen (name)); + obstack_1grow (&util_obstack, '"'); + return; + } + else + { + obstack_1grow (&util_obstack, '@'); + return; + } + } + else if (strcmp (name, TAG_CLASS) == 0) /* '#' */ + { + obstack_1grow (&util_obstack, '#'); + return; + } + else if (strcmp (name, TAG_SELECTOR) == 0) /* ':' */ + { + obstack_1grow (&util_obstack, ':'); + return; + } + } + } + else if (TREE_CODE (pointer_to) == INTEGER_TYPE + && TYPE_MODE (pointer_to) == QImode) + { + tree pname = TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE + ? OBJC_TYPE_NAME (pointer_to) + : DECL_NAME (OBJC_TYPE_NAME (pointer_to)); + + if (!flag_next_runtime || strcmp (IDENTIFIER_POINTER (pname), "BOOL")) + { + /* It appears that "r*" means "const char *" rather than + "char *const". */ + if (TYPE_READONLY (pointer_to)) + obstack_1grow (&util_obstack, 'r'); + + obstack_1grow (&util_obstack, '*'); + return; + } + } + + /* We have a type that does not get special treatment. */ + + /* NeXT extension */ + obstack_1grow (&util_obstack, '^'); + encode_type (pointer_to, curtype, format); +} + +static void +encode_array (tree type, int curtype, int format) +{ + tree an_int_cst = TYPE_SIZE (type); + tree array_of = TREE_TYPE (type); + char buffer[40]; + + /* An incomplete array is treated like a pointer. */ + if (an_int_cst == NULL) + { + encode_pointer (type, curtype, format); + return; + } + + if (TREE_INT_CST_LOW (TYPE_SIZE (array_of)) == 0) + sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT)0); + else + sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, + TREE_INT_CST_LOW (an_int_cst) + / TREE_INT_CST_LOW (TYPE_SIZE (array_of))); + + obstack_grow (&util_obstack, buffer, strlen (buffer)); + encode_type (array_of, curtype, format); + obstack_1grow (&util_obstack, ']'); + return; +} + +static void +encode_aggregate_fields (tree type, int pointed_to, int curtype, int format) +{ + tree field = TYPE_FIELDS (type); + + for (; field; field = TREE_CHAIN (field)) + { +#ifdef OBJCPLUS + /* C++ static members, and things that are not field at all, + should not appear in the encoding. */ + if (TREE_CODE (field) != FIELD_DECL || TREE_STATIC (field)) + continue; +#endif + + /* Recursively encode fields of embedded base classes. */ + if (DECL_ARTIFICIAL (field) && !DECL_NAME (field) + && TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE) + { + encode_aggregate_fields (TREE_TYPE (field), + pointed_to, curtype, format); + continue; + } + + if (generating_instance_variables && !pointed_to) + { + tree fname = DECL_NAME (field); + + obstack_1grow (&util_obstack, '"'); + + if (fname && TREE_CODE (fname) == IDENTIFIER_NODE) + obstack_grow (&util_obstack, + IDENTIFIER_POINTER (fname), + strlen (IDENTIFIER_POINTER (fname))); + + obstack_1grow (&util_obstack, '"'); + } + + encode_field_decl (field, curtype, format); + } +} + +static void +encode_aggregate_within (tree type, int curtype, int format, int left, + int right) +{ + tree name; + /* NB: aggregates that are pointed to have slightly different encoding + rules in that you never encode the names of instance variables. */ + int ob_size = obstack_object_size (&util_obstack); + char c1 = ob_size > 1 ? *(obstack_next_free (&util_obstack) - 2) : 0; + char c0 = ob_size > 0 ? *(obstack_next_free (&util_obstack) - 1) : 0; + int pointed_to = (c0 == '^' || (c1 == '^' && c0 == 'r')); + int inline_contents + = ((format == OBJC_ENCODE_INLINE_DEFS || generating_instance_variables) + && (!pointed_to || ob_size - curtype == (c1 == 'r' ? 2 : 1))); + + /* Traverse struct aliases; it is important to get the + original struct and its tag name (if any). */ + type = TYPE_MAIN_VARIANT (type); + name = OBJC_TYPE_NAME (type); + /* Open parenth/bracket. */ + obstack_1grow (&util_obstack, left); + + /* Encode the struct/union tag name, or '?' if a tag was + not provided. Typedef aliases do not qualify. */ + if (name && TREE_CODE (name) == IDENTIFIER_NODE +#ifdef OBJCPLUS + /* Did this struct have a tag? */ + && !TYPE_WAS_ANONYMOUS (type) +#endif + ) + obstack_grow (&util_obstack, + IDENTIFIER_POINTER (name), + strlen (IDENTIFIER_POINTER (name))); + else + obstack_1grow (&util_obstack, '?'); + + /* Encode the types (and possibly names) of the inner fields, + if required. */ + if (inline_contents) + { + obstack_1grow (&util_obstack, '='); + encode_aggregate_fields (type, pointed_to, curtype, format); + } + /* Close parenth/bracket. */ + obstack_1grow (&util_obstack, right); +} + +static void +encode_aggregate (tree type, int curtype, int format) +{ + enum tree_code code = TREE_CODE (type); + + switch (code) + { + case RECORD_TYPE: + { + encode_aggregate_within (type, curtype, format, '{', '}'); + break; + } + case UNION_TYPE: + { + encode_aggregate_within (type, curtype, format, '(', ')'); + break; + } + + case ENUMERAL_TYPE: + obstack_1grow (&util_obstack, 'i'); + break; + + default: + break; + } +} + +/* Encode a bitfield NeXT-style (i.e., without a bit offset or the underlying + field type. */ + +static void +encode_next_bitfield (int width) +{ + char buffer[40]; + sprintf (buffer, "b%d", width); + obstack_grow (&util_obstack, buffer, strlen (buffer)); +} + +/* FORMAT will be OBJC_ENCODE_INLINE_DEFS or OBJC_ENCODE_DONT_INLINE_DEFS. */ +static void +encode_type (tree type, int curtype, int format) +{ + enum tree_code code = TREE_CODE (type); + char c; + + if (TYPE_READONLY (type)) + obstack_1grow (&util_obstack, 'r'); + + if (code == INTEGER_TYPE) + { + switch (GET_MODE_BITSIZE (TYPE_MODE (type))) + { + case 8: c = TYPE_UNSIGNED (type) ? 'C' : 'c'; break; + case 16: c = TYPE_UNSIGNED (type) ? 'S' : 's'; break; + case 32: + if (type == long_unsigned_type_node + || type == long_integer_type_node) + c = TYPE_UNSIGNED (type) ? 'L' : 'l'; + else + c = TYPE_UNSIGNED (type) ? 'I' : 'i'; + break; + case 64: c = TYPE_UNSIGNED (type) ? 'Q' : 'q'; break; + default: abort (); + } + obstack_1grow (&util_obstack, c); + } + + else if (code == REAL_TYPE) + { + /* Floating point types. */ + switch (GET_MODE_BITSIZE (TYPE_MODE (type))) + { + case 32: c = 'f'; break; + case 64: + case 96: + case 128: c = 'd'; break; + default: abort (); + } + obstack_1grow (&util_obstack, c); + } + + else if (code == VOID_TYPE) + obstack_1grow (&util_obstack, 'v'); + + else if (code == BOOLEAN_TYPE) + obstack_1grow (&util_obstack, 'B'); + + else if (code == ARRAY_TYPE) + encode_array (type, curtype, format); + + else if (code == POINTER_TYPE) + encode_pointer (type, curtype, format); + + else if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE) + encode_aggregate (type, curtype, format); + + else if (code == FUNCTION_TYPE) /* '?' */ + obstack_1grow (&util_obstack, '?'); + + else if (code == COMPLEX_TYPE) + { + obstack_1grow (&util_obstack, 'j'); + encode_type (TREE_TYPE (type), curtype, format); + } +} + +static void +encode_gnu_bitfield (int position, tree type, int size) +{ + enum tree_code code = TREE_CODE (type); + char buffer[40]; + char charType = '?'; + + if (code == INTEGER_TYPE) + { + if (integer_zerop (TYPE_MIN_VALUE (type))) + { + /* Unsigned integer types. */ + + if (TYPE_MODE (type) == QImode) + charType = 'C'; + else if (TYPE_MODE (type) == HImode) + charType = 'S'; + else if (TYPE_MODE (type) == SImode) + { + if (type == long_unsigned_type_node) + charType = 'L'; + else + charType = 'I'; + } + else if (TYPE_MODE (type) == DImode) + charType = 'Q'; + } + + else + /* Signed integer types. */ + { + if (TYPE_MODE (type) == QImode) + charType = 'c'; + else if (TYPE_MODE (type) == HImode) + charType = 's'; + else if (TYPE_MODE (type) == SImode) + { + if (type == long_integer_type_node) + charType = 'l'; + else + charType = 'i'; + } + + else if (TYPE_MODE (type) == DImode) + charType = 'q'; + } + } + else if (code == ENUMERAL_TYPE) + charType = 'i'; + else + abort (); + + sprintf (buffer, "b%d%c%d", position, charType, size); + obstack_grow (&util_obstack, buffer, strlen (buffer)); +} + +static void +encode_field_decl (tree field_decl, int curtype, int format) +{ + tree type; + +#ifdef OBJCPLUS + /* C++ static members, and things that are not fields at all, + should not appear in the encoding. */ + if (TREE_CODE (field_decl) != FIELD_DECL || TREE_STATIC (field_decl)) + return; +#endif + + type = TREE_TYPE (field_decl); + + /* Generate the bitfield typing information, if needed. Note the difference + between GNU and NeXT runtimes. */ + if (DECL_BIT_FIELD_TYPE (field_decl)) + { + int size = tree_low_cst (DECL_SIZE (field_decl), 1); + + if (flag_next_runtime) + encode_next_bitfield (size); + else + encode_gnu_bitfield (int_bit_position (field_decl), + DECL_BIT_FIELD_TYPE (field_decl), size); + } + else + encode_type (TREE_TYPE (field_decl), curtype, format); +} + +static GTY(()) tree objc_parmlist = NULL_TREE; + +/* Append PARM to a list of formal parameters of a method, making a necessary + array-to-pointer adjustment along the way. */ + +static void +objc_push_parm (tree parm) +{ + bool relayout_needed = false; + /* Decay arrays and functions into pointers. */ + if (TREE_CODE (TREE_TYPE (parm)) == ARRAY_TYPE) + { + TREE_TYPE (parm) = build_pointer_type (TREE_TYPE (TREE_TYPE (parm))); + relayout_needed = true; + } + else if (TREE_CODE (TREE_TYPE (parm)) == FUNCTION_TYPE) + { + TREE_TYPE (parm) = build_pointer_type (TREE_TYPE (parm)); + relayout_needed = true; + } + + if (relayout_needed) + relayout_decl (parm); + + + DECL_ARG_TYPE (parm) + = lang_hooks.types.type_promotes_to (TREE_TYPE (parm)); + + /* Record constancy and volatility. */ + c_apply_type_quals_to_decl + ((TYPE_READONLY (TREE_TYPE (parm)) ? TYPE_QUAL_CONST : 0) + | (TYPE_RESTRICT (TREE_TYPE (parm)) ? TYPE_QUAL_RESTRICT : 0) + | (TYPE_VOLATILE (TREE_TYPE (parm)) ? TYPE_QUAL_VOLATILE : 0), parm); + + objc_parmlist = chainon (objc_parmlist, parm); +} + +/* Retrieve the formal parameter list constructed via preceding calls to + objc_push_parm(). */ + +#ifdef OBJCPLUS +static tree +objc_get_parm_info (int have_ellipsis ATTRIBUTE_UNUSED) +#else +static struct c_arg_info * +objc_get_parm_info (int have_ellipsis) +#endif +{ +#ifdef OBJCPLUS + tree parm_info = objc_parmlist; + objc_parmlist = NULL_TREE; + + return parm_info; +#else + tree parm_info = objc_parmlist; + struct c_arg_info *arg_info; + /* The C front-end requires an elaborate song and dance at + this point. */ + push_scope (); + declare_parm_level (); + while (parm_info) + { + tree next = TREE_CHAIN (parm_info); + + TREE_CHAIN (parm_info) = NULL_TREE; + parm_info = pushdecl (parm_info); + finish_decl (parm_info, NULL_TREE, NULL_TREE); + parm_info = next; + } + arg_info = get_parm_info (have_ellipsis); + pop_scope (); + objc_parmlist = NULL_TREE; + return arg_info; +#endif +} + +/* Synthesize the formal parameters 'id self' and 'SEL _cmd' needed for ObjC + method definitions. In the case of instance methods, we can be more + specific as to the type of 'self'. */ + +static void +synth_self_and_ucmd_args (void) +{ + tree self_type; + + if (objc_method_context + && TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL) + self_type = objc_instance_type; + else + /* Really a `struct objc_class *'. However, we allow people to + assign to self, which changes its type midstream. */ + self_type = objc_object_type; + + /* id self; */ + objc_push_parm (build_decl (PARM_DECL, self_id, self_type)); + + /* SEL _cmd; */ + objc_push_parm (build_decl (PARM_DECL, ucmd_id, objc_selector_type)); +} + +/* Transform an Objective-C method definition into a static C function + definition, synthesizing the first two arguments, "self" and "_cmd", + in the process. */ + +static void +start_method_def (tree method) +{ + tree parmlist; +#ifdef OBJCPLUS + tree parm_info; +#else + struct c_arg_info *parm_info; +#endif + int have_ellipsis = 0; + + /* If we are defining a "dealloc" method in a non-root class, we + will need to check if a [super dealloc] is missing, and warn if + it is. */ + if(CLASS_SUPER_NAME (objc_implementation_context) + && !strcmp ("dealloc", IDENTIFIER_POINTER (METHOD_SEL_NAME (method)))) + should_call_super_dealloc = 1; + else + should_call_super_dealloc = 0; + + /* Required to implement _msgSuper. */ + objc_method_context = method; + UOBJC_SUPER_decl = NULL_TREE; + + /* Generate prototype declarations for arguments..."new-style". */ + synth_self_and_ucmd_args (); + + /* Generate argument declarations if a keyword_decl. */ + parmlist = METHOD_SEL_ARGS (method); + while (parmlist) + { + tree type = TREE_VALUE (TREE_TYPE (parmlist)), parm; + + parm = build_decl (PARM_DECL, KEYWORD_ARG_NAME (parmlist), type); + objc_push_parm (parm); + parmlist = TREE_CHAIN (parmlist); + } + + if (METHOD_ADD_ARGS (method)) + { + tree akey; + + for (akey = TREE_CHAIN (METHOD_ADD_ARGS (method)); + akey; akey = TREE_CHAIN (akey)) + { + objc_push_parm (TREE_VALUE (akey)); + } + + if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) + have_ellipsis = 1; + } + + parm_info = objc_get_parm_info (have_ellipsis); + + really_start_method (objc_method_context, parm_info); +} + +static void +warn_with_method (const char *message, int mtype, tree method) +{ + /* Add a readable method name to the warning. */ + warning (0, "%J%s %<%c%s%>", method, + message, mtype, gen_method_decl (method)); +} + +/* Return 1 if TYPE1 is equivalent to TYPE2 + for purposes of method overloading. */ + +static int +objc_types_are_equivalent (tree type1, tree type2) +{ + if (type1 == type2) + return 1; + + /* Strip away indirections. */ + while ((TREE_CODE (type1) == ARRAY_TYPE || TREE_CODE (type1) == POINTER_TYPE) + && (TREE_CODE (type1) == TREE_CODE (type2))) + type1 = TREE_TYPE (type1), type2 = TREE_TYPE (type2); + if (TYPE_MAIN_VARIANT (type1) != TYPE_MAIN_VARIANT (type2)) + return 0; + + type1 = (TYPE_HAS_OBJC_INFO (type1) + ? TYPE_OBJC_PROTOCOL_LIST (type1) + : NULL_TREE); + type2 = (TYPE_HAS_OBJC_INFO (type2) + ? TYPE_OBJC_PROTOCOL_LIST (type2) + : NULL_TREE); + + if (list_length (type1) == list_length (type2)) + { + for (; type2; type2 = TREE_CHAIN (type2)) + if (!lookup_protocol_in_reflist (type1, TREE_VALUE (type2))) + return 0; + return 1; + } + return 0; +} + +/* Return 1 if TYPE1 has the same size and alignment as TYPE2. */ + +static int +objc_types_share_size_and_alignment (tree type1, tree type2) +{ + return (simple_cst_equal (TYPE_SIZE (type1), TYPE_SIZE (type2)) + && TYPE_ALIGN (type1) == TYPE_ALIGN (type2)); +} + +/* Return 1 if PROTO1 is equivalent to PROTO2 + for purposes of method overloading. Ordinarily, the type signatures + should match up exactly, unless STRICT is zero, in which case we + shall allow differences in which the size and alignment of a type + is the same. */ + +static int +comp_proto_with_proto (tree proto1, tree proto2, int strict) +{ + tree type1, type2; + + /* The following test is needed in case there are hashing + collisions. */ + if (METHOD_SEL_NAME (proto1) != METHOD_SEL_NAME (proto2)) + return 0; + + /* Compare return types. */ + type1 = TREE_VALUE (TREE_TYPE (proto1)); + type2 = TREE_VALUE (TREE_TYPE (proto2)); + + if (!objc_types_are_equivalent (type1, type2) + && (strict || !objc_types_share_size_and_alignment (type1, type2))) + return 0; + + /* Compare argument types. */ + for (type1 = get_arg_type_list (proto1, METHOD_REF, 0), + type2 = get_arg_type_list (proto2, METHOD_REF, 0); + type1 && type2; + type1 = TREE_CHAIN (type1), type2 = TREE_CHAIN (type2)) + { + if (!objc_types_are_equivalent (TREE_VALUE (type1), TREE_VALUE (type2)) + && (strict + || !objc_types_share_size_and_alignment (TREE_VALUE (type1), + TREE_VALUE (type2)))) + return 0; + } + + return (!type1 && !type2); +} + +/* Fold an OBJ_TYPE_REF expression for ObjC method dispatches, where + this occurs. ObjC method dispatches are _not_ like C++ virtual + member function dispatches, and we account for the difference here. */ +tree +#ifdef OBJCPLUS +objc_fold_obj_type_ref (tree ref, tree known_type) +#else +objc_fold_obj_type_ref (tree ref ATTRIBUTE_UNUSED, + tree known_type ATTRIBUTE_UNUSED) +#endif +{ +#ifdef OBJCPLUS + tree v = BINFO_VIRTUALS (TYPE_BINFO (known_type)); + + /* If the receiver does not have virtual member functions, there + is nothing we can (or need to) do here. */ + if (!v) + return NULL_TREE; + + /* Let C++ handle C++ virtual functions. */ + return cp_fold_obj_type_ref (ref, known_type); +#else + /* For plain ObjC, we currently do not need to do anything. */ + return NULL_TREE; +#endif +} + +static void +objc_start_function (tree name, tree type, tree attrs, +#ifdef OBJCPLUS + tree params +#else + struct c_arg_info *params +#endif + ) +{ + tree fndecl = build_decl (FUNCTION_DECL, name, type); + +#ifdef OBJCPLUS + DECL_ARGUMENTS (fndecl) = params; + DECL_INITIAL (fndecl) = error_mark_node; + DECL_EXTERNAL (fndecl) = 0; + TREE_STATIC (fndecl) = 1; + retrofit_lang_decl (fndecl); + cplus_decl_attributes (&fndecl, attrs, 0); + start_preparsed_function (fndecl, attrs, /*flags=*/SF_DEFAULT); +#else + struct c_label_context_se *nstack_se; + struct c_label_context_vm *nstack_vm; + nstack_se = XOBNEW (&parser_obstack, struct c_label_context_se); + nstack_se->labels_def = NULL; + nstack_se->labels_used = NULL; + nstack_se->next = label_context_stack_se; + label_context_stack_se = nstack_se; + nstack_vm = XOBNEW (&parser_obstack, struct c_label_context_vm); + nstack_vm->labels_def = NULL; + nstack_vm->labels_used = NULL; + nstack_vm->scope = 0; + nstack_vm->next = label_context_stack_vm; + label_context_stack_vm = nstack_vm; + current_function_returns_value = 0; /* Assume, until we see it does. */ + current_function_returns_null = 0; + + decl_attributes (&fndecl, attrs, 0); + announce_function (fndecl); + DECL_INITIAL (fndecl) = error_mark_node; + DECL_EXTERNAL (fndecl) = 0; + TREE_STATIC (fndecl) = 1; + current_function_decl = pushdecl (fndecl); + push_scope (); + declare_parm_level (); + DECL_RESULT (current_function_decl) + = build_decl (RESULT_DECL, NULL_TREE, + TREE_TYPE (TREE_TYPE (current_function_decl))); + DECL_ARTIFICIAL (DECL_RESULT (current_function_decl)) = 1; + DECL_IGNORED_P (DECL_RESULT (current_function_decl)) = 1; + start_fname_decls (); + store_parm_decls_from (params); +#endif + + TREE_USED (current_function_decl) = 1; +} + +/* - Generate an identifier for the function. the format is "_n_cls", + where 1 <= n <= nMethods, and cls is the name the implementation we + are processing. + - Install the return type from the method declaration. + - If we have a prototype, check for type consistency. */ + +static void +really_start_method (tree method, +#ifdef OBJCPLUS + tree parmlist +#else + struct c_arg_info *parmlist +#endif + ) +{ + tree ret_type, meth_type; + tree method_id; + const char *sel_name, *class_name, *cat_name; + char *buf; + + /* Synth the storage class & assemble the return type. */ + ret_type = TREE_VALUE (TREE_TYPE (method)); + + sel_name = IDENTIFIER_POINTER (METHOD_SEL_NAME (method)); + class_name = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)); + cat_name = ((TREE_CODE (objc_implementation_context) + == CLASS_IMPLEMENTATION_TYPE) + ? NULL + : IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context))); + method_slot++; + + /* Make sure this is big enough for any plausible method label. */ + buf = (char *) alloca (50 + strlen (sel_name) + strlen (class_name) + + (cat_name ? strlen (cat_name) : 0)); + + OBJC_GEN_METHOD_LABEL (buf, TREE_CODE (method) == INSTANCE_METHOD_DECL, + class_name, cat_name, sel_name, method_slot); + + method_id = get_identifier (buf); + +#ifdef OBJCPLUS + /* Objective-C methods cannot be overloaded, so we don't need + the type encoding appended. It looks bad anyway... */ + push_lang_context (lang_name_c); +#endif + + meth_type + = build_function_type (ret_type, + get_arg_type_list (method, METHOD_DEF, 0)); + objc_start_function (method_id, meth_type, NULL_TREE, parmlist); + + /* Set self_decl from the first argument. */ + self_decl = DECL_ARGUMENTS (current_function_decl); + + /* Suppress unused warnings. */ + TREE_USED (self_decl) = 1; + TREE_USED (TREE_CHAIN (self_decl)) = 1; +#ifdef OBJCPLUS + pop_lang_context (); +#endif + + METHOD_DEFINITION (method) = current_function_decl; + + /* Check consistency...start_function, pushdecl, duplicate_decls. */ + + if (implementation_template != objc_implementation_context) + { + tree proto + = lookup_method_static (implementation_template, + METHOD_SEL_NAME (method), + ((TREE_CODE (method) == CLASS_METHOD_DECL) + | OBJC_LOOKUP_NO_SUPER)); + + if (proto) + { + if (!comp_proto_with_proto (method, proto, 1)) + { + char type = (TREE_CODE (method) == INSTANCE_METHOD_DECL ? '-' : '+'); + + warn_with_method ("conflicting types for", type, method); + warn_with_method ("previous declaration of", type, proto); + } + } + else + { + /* We have a method @implementation even though we did not + see a corresponding @interface declaration (which is allowed + by Objective-C rules). Go ahead and place the method in + the @interface anyway, so that message dispatch lookups + will see it. */ + tree interface = implementation_template; + + if (TREE_CODE (objc_implementation_context) + == CATEGORY_IMPLEMENTATION_TYPE) + interface = lookup_category + (interface, + CLASS_SUPER_NAME (objc_implementation_context)); + + if (interface) + objc_add_method (interface, copy_node (method), + TREE_CODE (method) == CLASS_METHOD_DECL); + } + } +} + +static void *UOBJC_SUPER_scope = 0; + +/* _n_Method (id self, SEL sel, ...) + { + struct objc_super _S; + _msgSuper ((_S.self = self, _S.class = _cls, &_S), ...); + } */ + +static tree +get_super_receiver (void) +{ + if (objc_method_context) + { + tree super_expr, super_expr_list; + + if (!UOBJC_SUPER_decl) + { + UOBJC_SUPER_decl = build_decl (VAR_DECL, get_identifier (TAG_SUPER), + objc_super_template); + /* This prevents `unused variable' warnings when compiling with -Wall. */ + TREE_USED (UOBJC_SUPER_decl) = 1; + lang_hooks.decls.pushdecl (UOBJC_SUPER_decl); + finish_decl (UOBJC_SUPER_decl, NULL_TREE, NULL_TREE); + UOBJC_SUPER_scope = objc_get_current_scope (); + } + + /* Set receiver to self. */ + super_expr = objc_build_component_ref (UOBJC_SUPER_decl, self_id); + super_expr = build_modify_expr (super_expr, NOP_EXPR, self_decl); + super_expr_list = super_expr; + + /* Set class to begin searching. */ + super_expr = objc_build_component_ref (UOBJC_SUPER_decl, + get_identifier ("super_class")); + + if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE) + { + /* [_cls, __cls]Super are "pre-built" in + synth_forward_declarations. */ + + super_expr = build_modify_expr (super_expr, NOP_EXPR, + ((TREE_CODE (objc_method_context) + == INSTANCE_METHOD_DECL) + ? ucls_super_ref + : uucls_super_ref)); + } + + else + /* We have a category. */ + { + tree super_name = CLASS_SUPER_NAME (implementation_template); + tree super_class; + + /* Barf if super used in a category of Object. */ + if (!super_name) + { + error ("no super class declared in interface for %qs", + IDENTIFIER_POINTER (CLASS_NAME (implementation_template))); + return error_mark_node; + } + + if (flag_next_runtime && !flag_zero_link) + { + super_class = objc_get_class_reference (super_name); + if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL) + /* If we are in a class method, we must retrieve the + _metaclass_ for the current class, pointed at by + the class's "isa" pointer. The following assumes that + "isa" is the first ivar in a class (which it must be). */ + super_class + = build_indirect_ref + (build_c_cast (build_pointer_type (objc_class_type), + super_class), "unary *"); + } + else + { + add_class_reference (super_name); + super_class = (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL + ? objc_get_class_decl : objc_get_meta_class_decl); + assemble_external (super_class); + super_class + = build_function_call + (super_class, + build_tree_list + (NULL_TREE, + my_build_string_pointer + (IDENTIFIER_LENGTH (super_name) + 1, + IDENTIFIER_POINTER (super_name)))); + } + + super_expr + = build_modify_expr (super_expr, NOP_EXPR, + build_c_cast (TREE_TYPE (super_expr), + super_class)); + } + + super_expr_list = build_compound_expr (super_expr_list, super_expr); + + super_expr = build_unary_op (ADDR_EXPR, UOBJC_SUPER_decl, 0); + super_expr_list = build_compound_expr (super_expr_list, super_expr); + + return super_expr_list; + } + else + { + error ("[super ...] must appear in a method context"); + return error_mark_node; + } +} + +/* When exiting a scope, sever links to a 'super' declaration (if any) + therein contained. */ + +void +objc_clear_super_receiver (void) +{ + if (objc_method_context + && UOBJC_SUPER_scope == objc_get_current_scope ()) { + UOBJC_SUPER_decl = 0; + UOBJC_SUPER_scope = 0; + } +} + +void +objc_finish_method_definition (tree fndecl) +{ + /* We cannot validly inline ObjC methods, at least not without a language + extension to declare that a method need not be dynamically + dispatched, so suppress all thoughts of doing so. */ + DECL_INLINE (fndecl) = 0; + DECL_UNINLINABLE (fndecl) = 1; + +#ifndef OBJCPLUS + /* The C++ front-end will have called finish_function() for us. */ + finish_function (); +#endif + + METHOD_ENCODING (objc_method_context) + = encode_method_prototype (objc_method_context); + + /* Required to implement _msgSuper. This must be done AFTER finish_function, + since the optimizer may find "may be used before set" errors. */ + objc_method_context = NULL_TREE; + + if (should_call_super_dealloc) + warning (0, "method possibly missing a [super dealloc] call"); +} + +#if 0 +int +lang_report_error_function (tree decl) +{ + if (objc_method_context) + { + fprintf (stderr, "In method %qs\n", + IDENTIFIER_POINTER (METHOD_SEL_NAME (objc_method_context))); + return 1; + } + + else + return 0; +} +#endif + +/* Given a tree DECL node, produce a printable description of it in the given + buffer, overwriting the buffer. */ + +static char * +gen_declaration (tree decl) +{ + errbuf[0] = '\0'; + + if (DECL_P (decl)) + { + gen_type_name_0 (TREE_TYPE (decl)); + + if (DECL_NAME (decl)) + { + if (!POINTER_TYPE_P (TREE_TYPE (decl))) + strcat (errbuf, " "); + + strcat (errbuf, IDENTIFIER_POINTER (DECL_NAME (decl))); + } + + if (DECL_INITIAL (decl) + && TREE_CODE (DECL_INITIAL (decl)) == INTEGER_CST) + sprintf (errbuf + strlen (errbuf), ": " HOST_WIDE_INT_PRINT_DEC, + TREE_INT_CST_LOW (DECL_INITIAL (decl))); + } + + return errbuf; +} + +/* Given a tree TYPE node, produce a printable description of it in the given + buffer, overwriting the buffer. */ + +static char * +gen_type_name_0 (tree type) +{ + tree orig = type, proto; + + if (TYPE_P (type) && TYPE_NAME (type)) + type = TYPE_NAME (type); + else if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE) + { + tree inner = TREE_TYPE (type); + + while (TREE_CODE (inner) == ARRAY_TYPE) + inner = TREE_TYPE (inner); + + gen_type_name_0 (inner); + + if (!POINTER_TYPE_P (inner)) + strcat (errbuf, " "); + + if (POINTER_TYPE_P (type)) + strcat (errbuf, "*"); + else + while (type != inner) + { + strcat (errbuf, "["); + + if (TYPE_DOMAIN (type)) + { + char sz[20]; + + sprintf (sz, HOST_WIDE_INT_PRINT_DEC, + (TREE_INT_CST_LOW + (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1)); + strcat (errbuf, sz); + } + + strcat (errbuf, "]"); + type = TREE_TYPE (type); + } + + goto exit_function; + } + + if (TREE_CODE (type) == TYPE_DECL && DECL_NAME (type)) + type = DECL_NAME (type); + + strcat (errbuf, TREE_CODE (type) == IDENTIFIER_NODE + ? IDENTIFIER_POINTER (type) + : ""); + + /* For 'id' and 'Class', adopted protocols are stored in the pointee. */ + if (objc_is_id (orig)) + orig = TREE_TYPE (orig); + + proto = TYPE_HAS_OBJC_INFO (orig) ? TYPE_OBJC_PROTOCOL_LIST (orig) : NULL_TREE; + + if (proto) + { + strcat (errbuf, " <"); + + while (proto) { + strcat (errbuf, + IDENTIFIER_POINTER (PROTOCOL_NAME (TREE_VALUE (proto)))); + proto = TREE_CHAIN (proto); + strcat (errbuf, proto ? ", " : ">"); + } + } + + exit_function: + return errbuf; +} + +static char * +gen_type_name (tree type) +{ + errbuf[0] = '\0'; + + return gen_type_name_0 (type); +} + +/* Given a method tree, put a printable description into the given + buffer (overwriting) and return a pointer to the buffer. */ + +static char * +gen_method_decl (tree method) +{ + tree chain; + + strcpy (errbuf, "("); /* NB: Do _not_ call strcat() here. */ + gen_type_name_0 (TREE_VALUE (TREE_TYPE (method))); + strcat (errbuf, ")"); + chain = METHOD_SEL_ARGS (method); + + if (chain) + { + /* We have a chain of keyword_decls. */ + do + { + if (KEYWORD_KEY_NAME (chain)) + strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_KEY_NAME (chain))); + + strcat (errbuf, ":("); + gen_type_name_0 (TREE_VALUE (TREE_TYPE (chain))); + strcat (errbuf, ")"); + + strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_ARG_NAME (chain))); + if ((chain = TREE_CHAIN (chain))) + strcat (errbuf, " "); + } + while (chain); + + if (METHOD_ADD_ARGS (method)) + { + chain = TREE_CHAIN (METHOD_ADD_ARGS (method)); + + /* Know we have a chain of parm_decls. */ + while (chain) + { + strcat (errbuf, ", "); + gen_type_name_0 (TREE_TYPE (TREE_VALUE (chain))); + chain = TREE_CHAIN (chain); + } + + if (METHOD_ADD_ARGS_ELLIPSIS_P (method)) + strcat (errbuf, ", ..."); + } + } + + else + /* We have a unary selector. */ + strcat (errbuf, IDENTIFIER_POINTER (METHOD_SEL_NAME (method))); + + return errbuf; +} + +/* Debug info. */ + + +/* Dump an @interface declaration of the supplied class CHAIN to the + supplied file FP. Used to implement the -gen-decls option (which + prints out an @interface declaration of all classes compiled in + this run); potentially useful for debugging the compiler too. */ +static void +dump_interface (FILE *fp, tree chain) +{ + /* FIXME: A heap overflow here whenever a method (or ivar) + declaration is so long that it doesn't fit in the buffer. The + code and all the related functions should be rewritten to avoid + using fixed size buffers. */ + const char *my_name = IDENTIFIER_POINTER (CLASS_NAME (chain)); + tree ivar_decls = CLASS_RAW_IVARS (chain); + tree nst_methods = CLASS_NST_METHODS (chain); + tree cls_methods = CLASS_CLS_METHODS (chain); + + fprintf (fp, "\n@interface %s", my_name); + + /* CLASS_SUPER_NAME is used to store the superclass name for + classes, and the category name for categories. */ + if (CLASS_SUPER_NAME (chain)) + { + const char *name = IDENTIFIER_POINTER (CLASS_SUPER_NAME (chain)); + + if (TREE_CODE (chain) == CATEGORY_IMPLEMENTATION_TYPE + || TREE_CODE (chain) == CATEGORY_INTERFACE_TYPE) + { + fprintf (fp, " (%s)\n", name); + } + else + { + fprintf (fp, " : %s\n", name); + } + } + else + fprintf (fp, "\n"); + + /* FIXME - the following doesn't seem to work at the moment. */ + if (ivar_decls) + { + fprintf (fp, "{\n"); + do + { + fprintf (fp, "\t%s;\n", gen_declaration (ivar_decls)); + ivar_decls = TREE_CHAIN (ivar_decls); + } + while (ivar_decls); + fprintf (fp, "}\n"); + } + + while (nst_methods) + { + fprintf (fp, "- %s;\n", gen_method_decl (nst_methods)); + nst_methods = TREE_CHAIN (nst_methods); + } + + while (cls_methods) + { + fprintf (fp, "+ %s;\n", gen_method_decl (cls_methods)); + cls_methods = TREE_CHAIN (cls_methods); + } + + fprintf (fp, "@end\n"); +} + +/* Demangle function for Objective-C */ +static const char * +objc_demangle (const char *mangled) +{ + char *demangled, *cp; + + if (mangled[0] == '_' && + (mangled[1] == 'i' || mangled[1] == 'c') && + mangled[2] == '_') + { + cp = demangled = XNEWVEC (char, strlen(mangled) + 2); + if (mangled[1] == 'i') + *cp++ = '-'; /* for instance method */ + else + *cp++ = '+'; /* for class method */ + *cp++ = '['; /* opening left brace */ + strcpy(cp, mangled+3); /* tack on the rest of the mangled name */ + while (*cp && *cp == '_') + cp++; /* skip any initial underbars in class name */ + cp = strchr(cp, '_'); /* find first non-initial underbar */ + if (cp == NULL) + { + free(demangled); /* not mangled name */ + return mangled; + } + if (cp[1] == '_') /* easy case: no category name */ + { + *cp++ = ' '; /* replace two '_' with one ' ' */ + strcpy(cp, mangled + (cp - demangled) + 2); + } + else + { + *cp++ = '('; /* less easy case: category name */ + cp = strchr(cp, '_'); + if (cp == 0) + { + free(demangled); /* not mangled name */ + return mangled; + } + *cp++ = ')'; + *cp++ = ' '; /* overwriting 1st char of method name... */ + strcpy(cp, mangled + (cp - demangled)); /* get it back */ + } + while (*cp && *cp == '_') + cp++; /* skip any initial underbars in method name */ + for (; *cp; cp++) + if (*cp == '_') + *cp = ':'; /* replace remaining '_' with ':' */ + *cp++ = ']'; /* closing right brace */ + *cp++ = 0; /* string terminator */ + return demangled; + } + else + return mangled; /* not an objc mangled name */ +} + +const char * +objc_printable_name (tree decl, int kind ATTRIBUTE_UNUSED) +{ + return objc_demangle (IDENTIFIER_POINTER (DECL_NAME (decl))); +} + +static void +init_objc (void) +{ + gcc_obstack_init (&util_obstack); + util_firstobj = (char *) obstack_finish (&util_obstack); + + errbuf = XNEWVEC (char, 1024 * 10); + hash_init (); + synth_module_prologue (); +} + +static void +finish_objc (void) +{ + struct imp_entry *impent; + tree chain; + /* The internally generated initializers appear to have missing braces. + Don't warn about this. */ + int save_warn_missing_braces = warn_missing_braces; + warn_missing_braces = 0; + + /* A missing @end may not be detected by the parser. */ + if (objc_implementation_context) + { + warning (0, "%<@end%> missing in implementation context"); + finish_class (objc_implementation_context); + objc_ivar_chain = NULL_TREE; + objc_implementation_context = NULL_TREE; + } + + /* Process the static instances here because initialization of objc_symtab + depends on them. */ + if (objc_static_instances) + generate_static_references (); + + if (imp_list || class_names_chain + || meth_var_names_chain || meth_var_types_chain || sel_ref_chain) + generate_objc_symtab_decl (); + + for (impent = imp_list; impent; impent = impent->next) + { + objc_implementation_context = impent->imp_context; + implementation_template = impent->imp_template; + + UOBJC_CLASS_decl = impent->class_decl; + UOBJC_METACLASS_decl = impent->meta_decl; + + /* Dump the @interface of each class as we compile it, if the + -gen-decls option is in use. TODO: Dump the classes in the + order they were found, rather than in reverse order as we + are doing now. */ + if (flag_gen_declaration) + { + dump_interface (gen_declaration_file, objc_implementation_context); + } + + if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE) + { + /* all of the following reference the string pool... */ + generate_ivar_lists (); + generate_dispatch_tables (); + generate_shared_structures (impent->has_cxx_cdtors + ? CLS_HAS_CXX_STRUCTORS + : 0); + } + else + { + generate_dispatch_tables (); + generate_category (objc_implementation_context); + } + } + + /* If we are using an array of selectors, we must always + finish up the array decl even if no selectors were used. */ + if (! flag_next_runtime || sel_ref_chain) + build_selector_translation_table (); + + if (protocol_chain) + generate_protocols (); + + if ((flag_replace_objc_classes && imp_list) || flag_objc_gc) + generate_objc_image_info (); + + /* Arrange for ObjC data structures to be initialized at run time. */ + if (objc_implementation_context || class_names_chain || objc_static_instances + || meth_var_names_chain || meth_var_types_chain || sel_ref_chain) + { + build_module_descriptor (); + + if (!flag_next_runtime) + build_module_initializer_routine (); + } + + /* Dump the class references. This forces the appropriate classes + to be linked into the executable image, preserving unix archive + semantics. This can be removed when we move to a more dynamically + linked environment. */ + + for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain)) + { + handle_class_ref (chain); + if (TREE_PURPOSE (chain)) + generate_classref_translation_entry (chain); + } + + for (impent = imp_list; impent; impent = impent->next) + handle_impent (impent); + + if (warn_selector) + { + int slot; + hash hsh; + + /* Run through the selector hash tables and print a warning for any + selector which has multiple methods. */ + + for (slot = 0; slot < SIZEHASHTABLE; slot++) + { + for (hsh = cls_method_hash_list[slot]; hsh; hsh = hsh->next) + check_duplicates (hsh, 0, 1); + for (hsh = nst_method_hash_list[slot]; hsh; hsh = hsh->next) + check_duplicates (hsh, 0, 1); + } + } + + warn_missing_braces = save_warn_missing_braces; +} + +/* Subroutines of finish_objc. */ + +static void +generate_classref_translation_entry (tree chain) +{ + tree expr, decl, type; + + decl = TREE_PURPOSE (chain); + type = TREE_TYPE (decl); + + expr = add_objc_string (TREE_VALUE (chain), class_names); + expr = convert (type, expr); /* cast! */ + + /* The decl that is the one that we + forward declared in build_class_reference. */ + finish_var_decl (decl, expr); + return; +} + +static void +handle_class_ref (tree chain) +{ + const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain)); + char *string = (char *) alloca (strlen (name) + 30); + tree decl; + tree exp; + + sprintf (string, "%sobjc_class_name_%s", + (flag_next_runtime ? "." : "__"), name); + +#ifdef ASM_DECLARE_UNRESOLVED_REFERENCE + if (flag_next_runtime) + { + ASM_DECLARE_UNRESOLVED_REFERENCE (asm_out_file, string); + return; + } +#endif + + /* Make a decl for this name, so we can use its address in a tree. */ + decl = build_decl (VAR_DECL, get_identifier (string), char_type_node); + DECL_EXTERNAL (decl) = 1; + TREE_PUBLIC (decl) = 1; + + pushdecl (decl); + rest_of_decl_compilation (decl, 0, 0); + + /* Make a decl for the address. */ + sprintf (string, "%sobjc_class_ref_%s", + (flag_next_runtime ? "." : "__"), name); + exp = build1 (ADDR_EXPR, string_type_node, decl); + decl = build_decl (VAR_DECL, get_identifier (string), string_type_node); + DECL_INITIAL (decl) = exp; + TREE_STATIC (decl) = 1; + TREE_USED (decl) = 1; + /* Force the output of the decl as this forces the reference of the class. */ + mark_decl_referenced (decl); + + pushdecl (decl); + rest_of_decl_compilation (decl, 0, 0); +} + +static void +handle_impent (struct imp_entry *impent) +{ + char *string; + + objc_implementation_context = impent->imp_context; + implementation_template = impent->imp_template; + + if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) + { + const char *const class_name = + IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); + + string = (char *) alloca (strlen (class_name) + 30); + + sprintf (string, "%sobjc_class_name_%s", + (flag_next_runtime ? "." : "__"), class_name); + } + else if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE) + { + const char *const class_name = + IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); + const char *const class_super_name = + IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)); + + string = (char *) alloca (strlen (class_name) + + strlen (class_super_name) + 30); + + /* Do the same for categories. Even though no references to + these symbols are generated automatically by the compiler, it + gives you a handle to pull them into an archive by hand. */ + sprintf (string, "*%sobjc_category_name_%s_%s", + (flag_next_runtime ? "." : "__"), class_name, class_super_name); + } + else + return; + +#ifdef ASM_DECLARE_CLASS_REFERENCE + if (flag_next_runtime) + { + ASM_DECLARE_CLASS_REFERENCE (asm_out_file, string); + return; + } + else +#endif + { + tree decl, init; + + init = build_int_cst (c_common_type_for_size (BITS_PER_WORD, 1), 0); + decl = build_decl (VAR_DECL, get_identifier (string), TREE_TYPE (init)); + TREE_PUBLIC (decl) = 1; + TREE_READONLY (decl) = 1; + TREE_USED (decl) = 1; + TREE_CONSTANT (decl) = 1; + DECL_CONTEXT (decl) = 0; + DECL_ARTIFICIAL (decl) = 1; + DECL_INITIAL (decl) = init; + assemble_variable (decl, 1, 0, 0); + } +} + +/* The Fix-and-Continue functionality available in Mac OS X 10.3 and + later requires that ObjC translation units participating in F&C be + specially marked. The following routine accomplishes this. */ + +/* static int _OBJC_IMAGE_INFO[2] = { 0, 1 }; */ + +static void +generate_objc_image_info (void) +{ + tree decl, initlist; + int flags + = ((flag_replace_objc_classes && imp_list ? 1 : 0) + | (flag_objc_gc ? 2 : 0)); + + decl = start_var_decl (build_array_type + (integer_type_node, + build_index_type (build_int_cst (NULL_TREE, 2 - 1))), + "_OBJC_IMAGE_INFO"); + + initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, 0)); + initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, flags), initlist); + initlist = objc_build_constructor (TREE_TYPE (decl), nreverse (initlist)); + + finish_var_decl (decl, initlist); +} + +/* Look up ID as an instance variable. OTHER contains the result of + the C or C++ lookup, which we may want to use instead. */ + +tree +objc_lookup_ivar (tree other, tree id) +{ + tree ivar; + + /* If we are not inside of an ObjC method, ivar lookup makes no sense. */ + if (!objc_method_context) + return other; + + if (!strcmp (IDENTIFIER_POINTER (id), "super")) + /* We have a message to super. */ + return get_super_receiver (); + + /* In a class method, look up an instance variable only as a last + resort. */ + if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL + && other && other != error_mark_node) + return other; + + /* Look up the ivar, but do not use it if it is not accessible. */ + ivar = is_ivar (objc_ivar_chain, id); + + if (!ivar || is_private (ivar)) + return other; + + /* In an instance method, a local variable (or parameter) may hide the + instance variable. */ + if (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL + && other && other != error_mark_node +#ifdef OBJCPLUS + && CP_DECL_CONTEXT (other) != global_namespace) +#else + && !DECL_FILE_SCOPE_P (other)) +#endif + { + warning (0, "local declaration of %qs hides instance variable", + IDENTIFIER_POINTER (id)); + + return other; + } + + /* At this point, we are either in an instance method with no obscuring + local definitions, or in a class method with no alternate definitions + at all. */ + return build_ivar_reference (id); +} + +/* Possibly rewrite a function CALL into an OBJ_TYPE_REF expression. This + needs to be done if we are calling a function through a cast. */ + +tree +objc_rewrite_function_call (tree function, tree params) +{ + if (TREE_CODE (function) == NOP_EXPR + && TREE_CODE (TREE_OPERAND (function, 0)) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (TREE_OPERAND (function, 0), 0)) + == FUNCTION_DECL) + { + function = build3 (OBJ_TYPE_REF, TREE_TYPE (function), + TREE_OPERAND (function, 0), + TREE_VALUE (params), size_zero_node); + } + + return function; +} + +/* Look for the special case of OBJC_TYPE_REF with the address of + a function in OBJ_TYPE_REF_EXPR (presumably objc_msgSend or one + of its cousins). */ + +enum gimplify_status +objc_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p) +{ + enum gimplify_status r0, r1; + if (TREE_CODE (*expr_p) == OBJ_TYPE_REF + && TREE_CODE (OBJ_TYPE_REF_EXPR (*expr_p)) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (OBJ_TYPE_REF_EXPR (*expr_p), 0)) + == FUNCTION_DECL) + { + /* Postincrements in OBJ_TYPE_REF_OBJECT don't affect the + value of the OBJ_TYPE_REF, so force them to be emitted + during subexpression evaluation rather than after the + OBJ_TYPE_REF. This permits objc_msgSend calls in Objective + C to use direct rather than indirect calls when the + object expression has a postincrement. */ + r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p, NULL, + is_gimple_val, fb_rvalue); + r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p, post_p, + is_gimple_val, fb_rvalue); + + return MIN (r0, r1); + } + +#ifdef OBJCPLUS + return cp_gimplify_expr (expr_p, pre_p, post_p); +#else + return c_gimplify_expr (expr_p, pre_p, post_p); +#endif +} + +/* Given a CALL expression, find the function being called. The ObjC + version looks for the OBJ_TYPE_REF_EXPR which is used for objc_msgSend. */ + +tree +objc_get_callee_fndecl (tree call_expr) +{ + tree addr = TREE_OPERAND (call_expr, 0); + if (TREE_CODE (addr) != OBJ_TYPE_REF) + return 0; + + addr = OBJ_TYPE_REF_EXPR (addr); + + /* If the address is just `&f' for some function `f', then we know + that `f' is being called. */ + if (TREE_CODE (addr) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (addr, 0)) == FUNCTION_DECL) + return TREE_OPERAND (addr, 0); + + return 0; +} + +#include "gt-objc-objc-act.h" diff --git a/contrib/gcc/objc/objc-act.h b/contrib/gcc/objc/objc-act.h new file mode 100644 index 0000000..d801865 --- /dev/null +++ b/contrib/gcc/objc/objc-act.h @@ -0,0 +1,457 @@ +/* Declarations for objc-act.c. + Copyright (C) 1990, 2000, 2001, 2002, 2003, 2004, 2005 + Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#ifndef GCC_OBJC_ACT_H +#define GCC_OBJC_ACT_H + +/* For enum gimplify_status */ +#include "tree-gimple.h" + +/*** Language hooks ***/ + +bool objc_init (void); +const char *objc_printable_name (tree, int); +tree objc_get_callee_fndecl (tree); +void objc_finish_file (void); +tree objc_fold_obj_type_ref (tree, tree); +enum gimplify_status objc_gimplify_expr (tree *, tree *, tree *); + +/* NB: The remaining public functions are prototyped in c-common.h, for the + benefit of stub-objc.c and objc-act.c. */ + +/* Objective-C structures */ + +#define CLASS_LANG_SLOT_ELTS 5 +#define PROTOCOL_LANG_SLOT_ELTS 2 +#define OBJC_INFO_SLOT_ELTS 2 + +/* KEYWORD_DECL */ +#define KEYWORD_KEY_NAME(DECL) ((DECL)->decl_minimal.name) +#define KEYWORD_ARG_NAME(DECL) ((DECL)->decl_non_common.arguments) + +/* INSTANCE_METHOD_DECL, CLASS_METHOD_DECL */ +#define METHOD_SEL_NAME(DECL) ((DECL)->decl_minimal.name) +#define METHOD_SEL_ARGS(DECL) ((DECL)->decl_non_common.arguments) +#define METHOD_ADD_ARGS(DECL) ((DECL)->decl_non_common.result) +#define METHOD_ADD_ARGS_ELLIPSIS_P(DECL) ((DECL)->decl_common.lang_flag_0) +#define METHOD_DEFINITION(DECL) ((DECL)->decl_common.initial) +#define METHOD_ENCODING(DECL) ((DECL)->decl_minimal.context) + +/* CLASS_INTERFACE_TYPE, CLASS_IMPLEMENTATION_TYPE, + CATEGORY_INTERFACE_TYPE, CATEGORY_IMPLEMENTATION_TYPE, + PROTOCOL_INTERFACE_TYPE */ +#define CLASS_NAME(CLASS) ((CLASS)->type.name) +#define CLASS_SUPER_NAME(CLASS) (TYPE_CHECK (CLASS)->type.context) +#define CLASS_IVARS(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 0) +#define CLASS_RAW_IVARS(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 1) +#define CLASS_NST_METHODS(CLASS) ((CLASS)->type.minval) +#define CLASS_CLS_METHODS(CLASS) ((CLASS)->type.maxval) +#define CLASS_STATIC_TEMPLATE(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 2) +#define CLASS_CATEGORY_LIST(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 3) +#define CLASS_PROTOCOL_LIST(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 4) +#define PROTOCOL_NAME(CLASS) ((CLASS)->type.name) +#define PROTOCOL_LIST(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 0) +#define PROTOCOL_NST_METHODS(CLASS) ((CLASS)->type.minval) +#define PROTOCOL_CLS_METHODS(CLASS) ((CLASS)->type.maxval) +#define PROTOCOL_FORWARD_DECL(CLASS) TREE_VEC_ELT (TYPE_LANG_SLOT_1 (CLASS), 1) +#define PROTOCOL_DEFINED(CLASS) TREE_USED (CLASS) + +/* ObjC-specific information pertaining to RECORD_TYPEs are stored in + the LANG_SPECIFIC structures, which may itself need allocating first. */ + +/* The following three macros must be overridden (in objcp/objcp-decl.h) + for Objective-C++. */ +#define TYPE_OBJC_INFO(TYPE) TYPE_LANG_SPECIFIC (TYPE)->objc_info +#define SIZEOF_OBJC_TYPE_LANG_SPECIFIC sizeof (struct lang_type) +#define ALLOC_OBJC_TYPE_LANG_SPECIFIC(NODE) \ + do { \ + TYPE_LANG_SPECIFIC (NODE) = GGC_CNEW (struct lang_type); \ + } while (0) + +#define TYPE_HAS_OBJC_INFO(TYPE) \ + (TYPE_LANG_SPECIFIC (TYPE) && TYPE_OBJC_INFO (TYPE)) +#define TYPE_OBJC_INTERFACE(TYPE) TREE_VEC_ELT (TYPE_OBJC_INFO (TYPE), 0) +#define TYPE_OBJC_PROTOCOL_LIST(TYPE) TREE_VEC_ELT (TYPE_OBJC_INFO (TYPE), 1) + + +#define INIT_TYPE_OBJC_INFO(TYPE) \ + do \ + { \ + if (!TYPE_LANG_SPECIFIC (TYPE)) \ + ALLOC_OBJC_TYPE_LANG_SPECIFIC(TYPE); \ + if (!TYPE_OBJC_INFO (TYPE)) \ + TYPE_OBJC_INFO (TYPE) \ + = make_tree_vec (OBJC_INFO_SLOT_ELTS); \ + } \ + while (0) +#define DUP_TYPE_OBJC_INFO(DST, SRC) \ + do \ + { \ + ALLOC_OBJC_TYPE_LANG_SPECIFIC(DST); \ + if (TYPE_LANG_SPECIFIC (SRC)) \ + memcpy (TYPE_LANG_SPECIFIC (DST), \ + TYPE_LANG_SPECIFIC (SRC), \ + SIZEOF_OBJC_TYPE_LANG_SPECIFIC); \ + TYPE_OBJC_INFO (DST) \ + = make_tree_vec (OBJC_INFO_SLOT_ELTS); \ + } \ + while (0) + +#define TYPED_OBJECT(TYPE) \ + (TREE_CODE (TYPE) == RECORD_TYPE \ + && TYPE_HAS_OBJC_INFO (TYPE) \ + && TYPE_OBJC_INTERFACE (TYPE)) +#define OBJC_TYPE_NAME(TYPE) TYPE_NAME(TYPE) +#define OBJC_SET_TYPE_NAME(TYPE, NAME) (TYPE_NAME (TYPE) = NAME) + +/* Define the Objective-C or Objective-C++ language-specific tree codes. */ + +#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM, +enum objc_tree_code { +#if defined (GCC_CP_TREE_H) + LAST_BASE_TREE_CODE = LAST_CPLUS_TREE_CODE, +#else +#if defined (GCC_C_TREE_H) + LAST_BASE_TREE_CODE = LAST_C_TREE_CODE, +#else + #error You must include <c-tree.h> or <cp/cp-tree.h> before <objc/objc-act.h> +#endif +#endif +#include "objc-tree.def" + LAST_OBJC_TREE_CODE +}; +#undef DEFTREECODE + +/* Hash tables to manage the global pool of method prototypes. */ + +typedef struct hashed_entry *hash; +typedef struct hashed_attribute *attr; + +struct hashed_attribute GTY(()) +{ + attr next; + tree value; +}; +struct hashed_entry GTY(()) +{ + attr list; + hash next; + tree key; +}; + +extern GTY ((length ("SIZEHASHTABLE"))) hash *nst_method_hash_list; +extern GTY ((length ("SIZEHASHTABLE"))) hash *cls_method_hash_list; + +#define SIZEHASHTABLE 257 + +/* Objective-C/Objective-C++ @implementation list. */ + +struct imp_entry GTY(()) +{ + struct imp_entry *next; + tree imp_context; + tree imp_template; + tree class_decl; /* _OBJC_CLASS_<my_name>; */ + tree meta_decl; /* _OBJC_METACLASS_<my_name>; */ + BOOL_BITFIELD has_cxx_cdtors : 1; +}; + +extern GTY(()) struct imp_entry *imp_list; +extern GTY(()) int imp_count; /* `@implementation' */ +extern GTY(()) int cat_count; /* `@category' */ + +extern GTY(()) enum tree_code objc_inherit_code; +extern GTY(()) int objc_public_flag; + +/* Objective-C/Objective-C++ global tree enumeration. */ + +enum objc_tree_index +{ + OCTI_STATIC_NST, + OCTI_STATIC_NST_DECL, + OCTI_SELF_ID, + OCTI_UCMD_ID, + + OCTI_SELF_DECL, + OCTI_UMSG_DECL, + OCTI_UMSG_FAST_DECL, + OCTI_UMSG_SUPER_DECL, + OCTI_UMSG_STRET_DECL, + OCTI_UMSG_SUPER_STRET_DECL, + OCTI_GET_CLASS_DECL, + OCTI_GET_MCLASS_DECL, + OCTI_SUPER_TYPE, + OCTI_SEL_TYPE, + OCTI_ID_TYPE, + OCTI_CLS_TYPE, + OCTI_NST_TYPE, + OCTI_PROTO_TYPE, + + OCTI_CLS_CHAIN, + OCTI_ALIAS_CHAIN, + OCTI_INTF_CHAIN, + OCTI_PROTO_CHAIN, + OCTI_IMPL_CHAIN, + OCTI_CLS_REF_CHAIN, + OCTI_SEL_REF_CHAIN, + OCTI_IVAR_CHAIN, + OCTI_CLS_NAMES_CHAIN, + OCTI_METH_VAR_NAMES_CHAIN, + OCTI_METH_VAR_TYPES_CHAIN, + + OCTI_SYMBOLS_DECL, + OCTI_NST_VAR_DECL, + OCTI_CLS_VAR_DECL, + OCTI_NST_METH_DECL, + OCTI_CLS_METH_DECL, + OCTI_CLS_DECL, + OCTI_MCLS_DECL, + OCTI_SEL_TABLE_DECL, + OCTI_MODULES_DECL, + OCTI_GNU_INIT_DECL, + + OCTI_INTF_CTX, + OCTI_IMPL_CTX, + OCTI_METH_CTX, + OCTI_IVAR_CTX, + + OCTI_IMPL_TEMPL, + OCTI_CLS_TEMPL, + OCTI_CAT_TEMPL, + OCTI_UPRIV_REC, + OCTI_PROTO_TEMPL, + OCTI_SEL_TEMPL, + OCTI_UCLS_SUPER_REF, + OCTI_UUCLS_SUPER_REF, + OCTI_METH_TEMPL, + OCTI_IVAR_TEMPL, + OCTI_METH_LIST_TEMPL, + OCTI_METH_PROTO_LIST_TEMPL, + OCTI_IVAR_LIST_TEMPL, + OCTI_SYMTAB_TEMPL, + OCTI_MODULE_TEMPL, + OCTI_SUPER_TEMPL, + OCTI_OBJ_REF, + OCTI_CLS_REF, + OCTI_METH_PROTO_TEMPL, + OCTI_FUNCTION1_TEMPL, + OCTI_FUNCTION2_TEMPL, + + OCTI_OBJ_ID, + OCTI_CLS_ID, + OCTI_ID_NAME, + OCTI_CLASS_NAME, + OCTI_CNST_STR_ID, + OCTI_CNST_STR_TYPE, + OCTI_CNST_STR_GLOB_ID, + OCTI_STRING_CLASS_DECL, + OCTI_INTERNAL_CNST_STR_TYPE, + OCTI_SUPER_DECL, + OCTI_UMSG_NONNIL_DECL, + OCTI_UMSG_NONNIL_STRET_DECL, + OCTI_STORAGE_CLS, + OCTI_EXCEPTION_EXTRACT_DECL, + OCTI_EXCEPTION_TRY_ENTER_DECL, + OCTI_EXCEPTION_TRY_EXIT_DECL, + OCTI_EXCEPTION_MATCH_DECL, + OCTI_EXCEPTION_THROW_DECL, + OCTI_SYNC_ENTER_DECL, + OCTI_SYNC_EXIT_DECL, + OCTI_SETJMP_DECL, + OCTI_EXCDATA_TEMPL, + OCTI_STACK_EXCEPTION_DATA_DECL, + OCTI_LOCAL_EXCEPTION_DECL, + OCTI_RETHROW_EXCEPTION_DECL, + OCTI_EVAL_ONCE_DECL, + OCTI_CATCH_TYPE, + OCTI_EXECCLASS_DECL, + + OCTI_ASSIGN_IVAR_DECL, + OCTI_ASSIGN_IVAR_FAST_DECL, + OCTI_ASSIGN_GLOBAL_DECL, + OCTI_ASSIGN_STRONGCAST_DECL, + + OCTI_MAX +}; + +extern GTY(()) tree objc_global_trees[OCTI_MAX]; + +/* List of classes with list of their static instances. */ +#define objc_static_instances objc_global_trees[OCTI_STATIC_NST] + +/* The declaration of the array administrating the static instances. */ +#define static_instances_decl objc_global_trees[OCTI_STATIC_NST_DECL] + +/* Some commonly used instances of "identifier_node". */ + +#define self_id objc_global_trees[OCTI_SELF_ID] +#define ucmd_id objc_global_trees[OCTI_UCMD_ID] + +#define self_decl objc_global_trees[OCTI_SELF_DECL] +#define umsg_decl objc_global_trees[OCTI_UMSG_DECL] +#define umsg_fast_decl objc_global_trees[OCTI_UMSG_FAST_DECL] +#define umsg_super_decl objc_global_trees[OCTI_UMSG_SUPER_DECL] +#define umsg_stret_decl objc_global_trees[OCTI_UMSG_STRET_DECL] +#define umsg_super_stret_decl objc_global_trees[OCTI_UMSG_SUPER_STRET_DECL] +#define objc_get_class_decl objc_global_trees[OCTI_GET_CLASS_DECL] +#define objc_get_meta_class_decl \ + objc_global_trees[OCTI_GET_MCLASS_DECL] + +#define objc_super_type objc_global_trees[OCTI_SUPER_TYPE] +#define objc_selector_type objc_global_trees[OCTI_SEL_TYPE] +#define objc_object_type objc_global_trees[OCTI_ID_TYPE] +#define objc_class_type objc_global_trees[OCTI_CLS_TYPE] +#define objc_instance_type objc_global_trees[OCTI_NST_TYPE] +#define objc_protocol_type objc_global_trees[OCTI_PROTO_TYPE] + +/* Type checking macros. */ + +#define IS_ID(TYPE) \ + (TREE_CODE (TYPE) == POINTER_TYPE \ + && (TYPE_MAIN_VARIANT (TREE_TYPE (TYPE)) \ + == TREE_TYPE (objc_object_type))) +#define IS_CLASS(TYPE) \ + (TREE_CODE (TYPE) == POINTER_TYPE \ + && (TYPE_MAIN_VARIANT (TREE_TYPE (TYPE)) \ + == TREE_TYPE (objc_class_type))) +#define IS_PROTOCOL_QUALIFIED_UNTYPED(TYPE) \ + ((IS_ID (TYPE) || IS_CLASS (TYPE)) \ + && TYPE_HAS_OBJC_INFO (TREE_TYPE (TYPE)) \ + && TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (TYPE))) +#define IS_SUPER(TYPE) \ + (TREE_CODE (TYPE) == POINTER_TYPE \ + && TREE_TYPE (TYPE) == objc_super_template) + +#define class_chain objc_global_trees[OCTI_CLS_CHAIN] +#define alias_chain objc_global_trees[OCTI_ALIAS_CHAIN] +#define interface_chain objc_global_trees[OCTI_INTF_CHAIN] +#define protocol_chain objc_global_trees[OCTI_PROTO_CHAIN] +#define implemented_classes objc_global_trees[OCTI_IMPL_CHAIN] + +/* Chains to manage selectors that are referenced and defined in the + module. */ + +#define cls_ref_chain objc_global_trees[OCTI_CLS_REF_CHAIN] /* Classes referenced. */ +#define sel_ref_chain objc_global_trees[OCTI_SEL_REF_CHAIN] /* Selectors referenced. */ +#define objc_ivar_chain objc_global_trees[OCTI_IVAR_CHAIN] + +/* Chains to manage uniquing of strings. */ + +#define class_names_chain objc_global_trees[OCTI_CLS_NAMES_CHAIN] +#define meth_var_names_chain objc_global_trees[OCTI_METH_VAR_NAMES_CHAIN] +#define meth_var_types_chain objc_global_trees[OCTI_METH_VAR_TYPES_CHAIN] + + +/* Backend data declarations. */ + +#define UOBJC_SYMBOLS_decl objc_global_trees[OCTI_SYMBOLS_DECL] +#define UOBJC_INSTANCE_VARIABLES_decl objc_global_trees[OCTI_NST_VAR_DECL] +#define UOBJC_CLASS_VARIABLES_decl objc_global_trees[OCTI_CLS_VAR_DECL] +#define UOBJC_INSTANCE_METHODS_decl objc_global_trees[OCTI_NST_METH_DECL] +#define UOBJC_CLASS_METHODS_decl objc_global_trees[OCTI_CLS_METH_DECL] +#define UOBJC_CLASS_decl objc_global_trees[OCTI_CLS_DECL] +#define UOBJC_METACLASS_decl objc_global_trees[OCTI_MCLS_DECL] +#define UOBJC_SELECTOR_TABLE_decl objc_global_trees[OCTI_SEL_TABLE_DECL] +#define UOBJC_MODULES_decl objc_global_trees[OCTI_MODULES_DECL] +#define GNU_INIT_decl objc_global_trees[OCTI_GNU_INIT_DECL] + +/* The following are used when compiling a class implementation. + implementation_template will normally be an interface, however if + none exists this will be equal to objc_implementation_context...it is + set in start_class. */ + +#define objc_interface_context objc_global_trees[OCTI_INTF_CTX] +#define objc_implementation_context objc_global_trees[OCTI_IMPL_CTX] +#define objc_method_context objc_global_trees[OCTI_METH_CTX] +#define objc_ivar_context objc_global_trees[OCTI_IVAR_CTX] + +#define implementation_template objc_global_trees[OCTI_IMPL_TEMPL] +#define objc_class_template objc_global_trees[OCTI_CLS_TEMPL] +#define objc_category_template objc_global_trees[OCTI_CAT_TEMPL] +#define uprivate_record objc_global_trees[OCTI_UPRIV_REC] +#define objc_protocol_template objc_global_trees[OCTI_PROTO_TEMPL] +#define objc_selector_template objc_global_trees[OCTI_SEL_TEMPL] +#define ucls_super_ref objc_global_trees[OCTI_UCLS_SUPER_REF] +#define uucls_super_ref objc_global_trees[OCTI_UUCLS_SUPER_REF] + +#define umsg_nonnil_decl objc_global_trees[OCTI_UMSG_NONNIL_DECL] +#define umsg_nonnil_stret_decl objc_global_trees[OCTI_UMSG_NONNIL_STRET_DECL] +#define objc_storage_class objc_global_trees[OCTI_STORAGE_CLS] +#define objc_exception_extract_decl \ + objc_global_trees[OCTI_EXCEPTION_EXTRACT_DECL] +#define objc_exception_try_enter_decl \ + objc_global_trees[OCTI_EXCEPTION_TRY_ENTER_DECL] +#define objc_exception_try_exit_decl \ + objc_global_trees[OCTI_EXCEPTION_TRY_EXIT_DECL] +#define objc_exception_match_decl \ + objc_global_trees[OCTI_EXCEPTION_MATCH_DECL] +#define objc_exception_throw_decl \ + objc_global_trees[OCTI_EXCEPTION_THROW_DECL] +#define objc_sync_enter_decl objc_global_trees[OCTI_SYNC_ENTER_DECL] +#define objc_sync_exit_decl objc_global_trees[OCTI_SYNC_EXIT_DECL] +#define objc_exception_data_template \ + objc_global_trees[OCTI_EXCDATA_TEMPL] +#define objc_setjmp_decl objc_global_trees[OCTI_SETJMP_DECL] +#define objc_stack_exception_data \ + objc_global_trees[OCTI_STACK_EXCEPTION_DATA_DECL] +#define objc_caught_exception objc_global_trees[OCTI_LOCAL_EXCEPTION_DECL] +#define objc_rethrow_exception objc_global_trees[OCTI_RETHROW_EXCEPTION_DECL] +#define objc_eval_once objc_global_trees[OCTI_EVAL_ONCE_DECL] +#define objc_catch_type objc_global_trees[OCTI_CATCH_TYPE] + +#define execclass_decl objc_global_trees[OCTI_EXECCLASS_DECL] + +#define objc_assign_ivar_decl objc_global_trees[OCTI_ASSIGN_IVAR_DECL] +#define objc_assign_ivar_fast_decl \ + objc_global_trees[OCTI_ASSIGN_IVAR_FAST_DECL] +#define objc_assign_global_decl objc_global_trees[OCTI_ASSIGN_GLOBAL_DECL] +#define objc_assign_strong_cast_decl \ + objc_global_trees[OCTI_ASSIGN_STRONGCAST_DECL] + +#define objc_method_template objc_global_trees[OCTI_METH_TEMPL] +#define objc_ivar_template objc_global_trees[OCTI_IVAR_TEMPL] +#define objc_method_list_ptr objc_global_trees[OCTI_METH_LIST_TEMPL] +#define objc_method_proto_list_ptr \ + objc_global_trees[OCTI_METH_PROTO_LIST_TEMPL] +#define objc_ivar_list_ptr objc_global_trees[OCTI_IVAR_LIST_TEMPL] +#define objc_symtab_template objc_global_trees[OCTI_SYMTAB_TEMPL] +#define objc_module_template objc_global_trees[OCTI_MODULE_TEMPL] +#define objc_super_template objc_global_trees[OCTI_SUPER_TEMPL] +#define objc_object_reference objc_global_trees[OCTI_OBJ_REF] +#define objc_class_reference objc_global_trees[OCTI_CLS_REF] +#define objc_method_prototype_template \ + objc_global_trees[OCTI_METH_PROTO_TEMPL] +#define function1_template objc_global_trees[OCTI_FUNCTION1_TEMPL] +#define function2_template objc_global_trees[OCTI_FUNCTION2_TEMPL] + +#define objc_object_id objc_global_trees[OCTI_OBJ_ID] +#define objc_class_id objc_global_trees[OCTI_CLS_ID] +#define objc_object_name objc_global_trees[OCTI_ID_NAME] +#define objc_class_name objc_global_trees[OCTI_CLASS_NAME] +#define constant_string_id objc_global_trees[OCTI_CNST_STR_ID] +#define constant_string_type objc_global_trees[OCTI_CNST_STR_TYPE] +#define constant_string_global_id \ + objc_global_trees[OCTI_CNST_STR_GLOB_ID] +#define string_class_decl objc_global_trees[OCTI_STRING_CLASS_DECL] +#define internal_const_str_type objc_global_trees[OCTI_INTERNAL_CNST_STR_TYPE] +#define UOBJC_SUPER_decl objc_global_trees[OCTI_SUPER_DECL] + +#endif /* GCC_OBJC_ACT_H */ diff --git a/contrib/gcc/objc/objc-lang.c b/contrib/gcc/objc/objc-lang.c new file mode 100644 index 0000000..b94f037 --- /dev/null +++ b/contrib/gcc/objc/objc-lang.c @@ -0,0 +1,133 @@ +/* Language-dependent hooks for Objective-C. + Copyright 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + Contributed by Ziemowit Laski <zlaski@apple.com> + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "tree.h" +#include "c-tree.h" +#include "c-common.h" +#include "ggc.h" +#include "objc-act.h" +#include "langhooks.h" +#include "langhooks-def.h" +#include "diagnostic.h" +#include "c-objc-common.h" + +enum c_language_kind c_language = clk_objc; +static void objc_init_ts (void); + +/* Lang hooks common to C and ObjC are declared in c-objc-common.h; + consequently, there should be very few hooks below. */ + +#undef LANG_HOOKS_NAME +#define LANG_HOOKS_NAME "GNU Objective-C" +#undef LANG_HOOKS_INIT +#define LANG_HOOKS_INIT objc_init +#undef LANG_HOOKS_DECL_PRINTABLE_NAME +#define LANG_HOOKS_DECL_PRINTABLE_NAME objc_printable_name +#undef LANG_HOOKS_GIMPLIFY_EXPR +#define LANG_HOOKS_GIMPLIFY_EXPR objc_gimplify_expr +#undef LANG_HOOKS_GET_CALLEE_FNDECL +#define LANG_HOOKS_GET_CALLEE_FNDECL objc_get_callee_fndecl +#undef LANG_HOOKS_INIT_TS +#define LANG_HOOKS_INIT_TS objc_init_ts + +/* Each front end provides its own lang hook initializer. */ +const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER; + +/* Table indexed by tree code giving a string containing a character + classifying the tree code. */ + +#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, + +const enum tree_code_class tree_code_type[] = { +#include "tree.def" + tcc_exceptional, +#include "c-common.def" + tcc_exceptional, +#include "objc-tree.def" +}; +#undef DEFTREECODE + +/* Table indexed by tree code giving number of expression + operands beyond the fixed part of the node structure. + Not used for types or decls. */ + +#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH, + +const unsigned char tree_code_length[] = { +#include "tree.def" + 0, +#include "c-common.def" + 0, +#include "objc-tree.def" +}; +#undef DEFTREECODE + +/* Names of tree components. + Used for printing out the tree and error messages. */ +#define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME, + +const char * const tree_code_name[] = { +#include "tree.def" + "@@dummy", +#include "c-common.def" + "@@dummy", +#include "objc-tree.def" +}; +#undef DEFTREECODE + +/* Lang hook routines common to C and ObjC appear in c-objc-common.c; + there should be very few (if any) routines below. */ + +static void +objc_init_ts (void) +{ + tree_contains_struct[CLASS_METHOD_DECL][TS_DECL_NON_COMMON] = 1; + tree_contains_struct[INSTANCE_METHOD_DECL][TS_DECL_NON_COMMON] = 1; + tree_contains_struct[KEYWORD_DECL][TS_DECL_NON_COMMON] = 1; + + tree_contains_struct[CLASS_METHOD_DECL][TS_DECL_WITH_VIS] = 1; + tree_contains_struct[INSTANCE_METHOD_DECL][TS_DECL_WITH_VIS] = 1; + tree_contains_struct[KEYWORD_DECL][TS_DECL_WITH_VIS] = 1; + + tree_contains_struct[CLASS_METHOD_DECL][TS_DECL_WRTL] = 1; + tree_contains_struct[INSTANCE_METHOD_DECL][TS_DECL_WRTL] = 1; + tree_contains_struct[KEYWORD_DECL][TS_DECL_WRTL] = 1; + + tree_contains_struct[CLASS_METHOD_DECL][TS_DECL_MINIMAL] = 1; + tree_contains_struct[INSTANCE_METHOD_DECL][TS_DECL_MINIMAL] = 1; + tree_contains_struct[KEYWORD_DECL][TS_DECL_MINIMAL] = 1; + + tree_contains_struct[CLASS_METHOD_DECL][TS_DECL_COMMON] = 1; + tree_contains_struct[INSTANCE_METHOD_DECL][TS_DECL_COMMON] = 1; + tree_contains_struct[KEYWORD_DECL][TS_DECL_COMMON] = 1; +} + +void +finish_file (void) +{ + objc_finish_file (); +} + +#include "gtype-objc.h" diff --git a/contrib/gcc/objc/objc-tree.def b/contrib/gcc/objc/objc-tree.def new file mode 100644 index 0000000..bf847aa --- /dev/null +++ b/contrib/gcc/objc/objc-tree.def @@ -0,0 +1,47 @@ +/* This file contains the definitions and documentation for the + additional tree codes used in the Objective C front end (see tree.def + for the standard codes). + Copyright (C) 1990, 1997, 1998, 1999, 2000, 2001, 2003, 2004 + Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + + +/* Objective-C types. */ +DEFTREECODE (CLASS_INTERFACE_TYPE, "class_interface_type", tcc_type, 0) +DEFTREECODE (CLASS_IMPLEMENTATION_TYPE, "class_implementation_type", + tcc_type, 0) +DEFTREECODE (CATEGORY_INTERFACE_TYPE, "category_interface_type", tcc_type, 0) +DEFTREECODE (CATEGORY_IMPLEMENTATION_TYPE,"category_implementation_type", + tcc_type, 0) +DEFTREECODE (PROTOCOL_INTERFACE_TYPE, "protocol_interface_type", tcc_type, 0) + +/* Objective-C decls. */ +DEFTREECODE (KEYWORD_DECL, "keyword_decl", tcc_declaration, 0) +DEFTREECODE (INSTANCE_METHOD_DECL, "instance_method_decl", tcc_declaration, 0) +DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl", tcc_declaration, 0) + +/* Objective-C expressions. */ +DEFTREECODE (MESSAGE_SEND_EXPR, "message_send_expr", tcc_expression, 3) +DEFTREECODE (CLASS_REFERENCE_EXPR, "class_reference_expr", tcc_expression, 1) + +/* +Local variables: +mode:c +End: +*/ |
