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Diffstat (limited to 'contrib/gdb/gdb/linespec.c')
| -rw-r--r-- | contrib/gdb/gdb/linespec.c | 1273 |
1 files changed, 1273 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/linespec.c b/contrib/gdb/gdb/linespec.c new file mode 100644 index 0000000..ca9d01d --- /dev/null +++ b/contrib/gdb/gdb/linespec.c @@ -0,0 +1,1273 @@ +/* Parser for linespec for the GNU debugger, GDB. + Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, + 1996, 1997, 1998, 1999, 2000, 2001 + Free Software Foundation, Inc. + + This file is part of GDB. + + This program 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 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "symtab.h" +#include "frame.h" +#include "command.h" +#include "symfile.h" +#include "objfiles.h" +#include "demangle.h" +#include "value.h" +#include "completer.h" +#include "cp-abi.h" + +/* Prototype for one function in parser-defs.h, + instead of including that entire file. */ + +extern char *find_template_name_end (char *); + +/* We share this one with symtab.c, but it is not exported widely. */ + +extern char *operator_chars (char *, char **); + +/* Prototypes for local functions */ + +static void cplusplus_error (const char *name, const char *fmt, ...) ATTR_FORMAT (printf, 2, 3); + +static int total_number_of_methods (struct type *type); + +static int find_methods (struct type *, char *, struct symbol **); + +static void build_canonical_line_spec (struct symtab_and_line *, + char *, char ***); + +static char *find_toplevel_char (char *s, char c); + +static struct symtabs_and_lines decode_line_2 (struct symbol *[], + int, int, char ***); + +/* Helper functions. */ + +/* Issue a helpful hint on using the command completion feature on + single quoted demangled C++ symbols as part of the completion + error. */ + +static void +cplusplus_error (const char *name, const char *fmt, ...) +{ + struct ui_file *tmp_stream; + tmp_stream = mem_fileopen (); + make_cleanup_ui_file_delete (tmp_stream); + + { + va_list args; + va_start (args, fmt); + vfprintf_unfiltered (tmp_stream, fmt, args); + va_end (args); + } + + while (*name == '\'') + name++; + fprintf_unfiltered (tmp_stream, + ("Hint: try '%s<TAB> or '%s<ESC-?>\n" + "(Note leading single quote.)"), + name, name); + error_stream (tmp_stream); +} + +/* Return the number of methods described for TYPE, including the + methods from types it derives from. This can't be done in the symbol + reader because the type of the baseclass might still be stubbed + when the definition of the derived class is parsed. */ + +static int +total_number_of_methods (struct type *type) +{ + int n; + int count; + + CHECK_TYPEDEF (type); + if (TYPE_CPLUS_SPECIFIC (type) == NULL) + return 0; + count = TYPE_NFN_FIELDS_TOTAL (type); + + for (n = 0; n < TYPE_N_BASECLASSES (type); n++) + count += total_number_of_methods (TYPE_BASECLASS (type, n)); + + return count; +} + +/* Recursive helper function for decode_line_1. + Look for methods named NAME in type T. + Return number of matches. + Put matches in SYM_ARR, which should have been allocated with + a size of total_number_of_methods (T) * sizeof (struct symbol *). + Note that this function is g++ specific. */ + +static int +find_methods (struct type *t, char *name, struct symbol **sym_arr) +{ + int i1 = 0; + int ibase; + char *class_name = type_name_no_tag (t); + + /* Ignore this class if it doesn't have a name. This is ugly, but + unless we figure out how to get the physname without the name of + the class, then the loop can't do any good. */ + if (class_name + && (lookup_symbol (class_name, (struct block *) NULL, + STRUCT_NAMESPACE, (int *) NULL, + (struct symtab **) NULL))) + { + int method_counter; + + CHECK_TYPEDEF (t); + + /* Loop over each method name. At this level, all overloads of a name + are counted as a single name. There is an inner loop which loops over + each overload. */ + + for (method_counter = TYPE_NFN_FIELDS (t) - 1; + method_counter >= 0; + --method_counter) + { + int field_counter; + char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter); + char dem_opname[64]; + + if (strncmp (method_name, "__", 2) == 0 || + strncmp (method_name, "op", 2) == 0 || + strncmp (method_name, "type", 4) == 0) + { + if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI)) + method_name = dem_opname; + else if (cplus_demangle_opname (method_name, dem_opname, 0)) + method_name = dem_opname; + } + + if (strcmp_iw (name, method_name) == 0) + /* Find all the overloaded methods with that name. */ + for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; + field_counter >= 0; + --field_counter) + { + struct fn_field *f; + char *phys_name; + + f = TYPE_FN_FIELDLIST1 (t, method_counter); + + if (TYPE_FN_FIELD_STUB (f, field_counter)) + { + char *tmp_name; + + tmp_name = gdb_mangle_name (t, + method_counter, + field_counter); + phys_name = alloca (strlen (tmp_name) + 1); + strcpy (phys_name, tmp_name); + xfree (tmp_name); + } + else + phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); + + /* Destructor is handled by caller, dont add it to the list */ + if (is_destructor_name (phys_name) != 0) + continue; + + sym_arr[i1] = lookup_symbol (phys_name, + NULL, VAR_NAMESPACE, + (int *) NULL, + (struct symtab **) NULL); + if (sym_arr[i1]) + i1++; + else + { + /* This error message gets printed, but the method + still seems to be found + fputs_filtered("(Cannot find method ", gdb_stdout); + fprintf_symbol_filtered (gdb_stdout, phys_name, + language_cplus, + DMGL_PARAMS | DMGL_ANSI); + fputs_filtered(" - possibly inlined.)\n", gdb_stdout); + */ + } + } + else if (strcmp_iw (class_name, name) == 0) + { + /* For GCC 3.x and stabs, constructors and destructors have names + like __base_ctor and __complete_dtor. Check the physname for now + if we're looking for a constructor. */ + for (field_counter + = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; + field_counter >= 0; + --field_counter) + { + struct fn_field *f; + char *phys_name; + + f = TYPE_FN_FIELDLIST1 (t, method_counter); + + /* GCC 3.x will never produce stabs stub methods, so we don't need + to handle this case. */ + if (TYPE_FN_FIELD_STUB (f, field_counter)) + continue; + phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); + if (! is_constructor_name (phys_name)) + continue; + + /* If this method is actually defined, include it in the + list. */ + sym_arr[i1] = lookup_symbol (phys_name, + NULL, VAR_NAMESPACE, + (int *) NULL, + (struct symtab **) NULL); + if (sym_arr[i1]) + i1++; + } + } + } + } + + /* Only search baseclasses if there is no match yet, since names in + derived classes override those in baseclasses. + + FIXME: The above is not true; it is only true of member functions + if they have the same number of arguments (??? - section 13.1 of the + ARM says the function members are not in the same scope but doesn't + really spell out the rules in a way I understand. In any case, if + the number of arguments differ this is a case in which we can overload + rather than hiding without any problem, and gcc 2.4.5 does overload + rather than hiding in this case). */ + + if (i1 == 0) + for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++) + i1 += find_methods (TYPE_BASECLASS (t, ibase), name, sym_arr + i1); + + return i1; +} + +/* Helper function for decode_line_1. + Build a canonical line spec in CANONICAL if it is non-NULL and if + the SAL has a symtab. + If SYMNAME is non-NULL the canonical line spec is `filename:symname'. + If SYMNAME is NULL the line number from SAL is used and the canonical + line spec is `filename:linenum'. */ + +static void +build_canonical_line_spec (struct symtab_and_line *sal, char *symname, + char ***canonical) +{ + char **canonical_arr; + char *canonical_name; + char *filename; + struct symtab *s = sal->symtab; + + if (s == (struct symtab *) NULL + || s->filename == (char *) NULL + || canonical == (char ***) NULL) + return; + + canonical_arr = (char **) xmalloc (sizeof (char *)); + *canonical = canonical_arr; + + filename = s->filename; + if (symname != NULL) + { + canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2); + sprintf (canonical_name, "%s:%s", filename, symname); + } + else + { + canonical_name = xmalloc (strlen (filename) + 30); + sprintf (canonical_name, "%s:%d", filename, sal->line); + } + canonical_arr[0] = canonical_name; +} + + + +/* Find an instance of the character C in the string S that is outside + of all parenthesis pairs, single-quoted strings, and double-quoted + strings. */ +static char * +find_toplevel_char (char *s, char c) +{ + int quoted = 0; /* zero if we're not in quotes; + '"' if we're in a double-quoted string; + '\'' if we're in a single-quoted string. */ + int depth = 0; /* number of unclosed parens we've seen */ + char *scan; + + for (scan = s; *scan; scan++) + { + if (quoted) + { + if (*scan == quoted) + quoted = 0; + else if (*scan == '\\' && *(scan + 1)) + scan++; + } + else if (*scan == c && ! quoted && depth == 0) + return scan; + else if (*scan == '"' || *scan == '\'') + quoted = *scan; + else if (*scan == '(') + depth++; + else if (*scan == ')' && depth > 0) + depth--; + } + + return 0; +} + +/* Given a list of NELTS symbols in SYM_ARR, return a list of lines to + operate on (ask user if necessary). + If CANONICAL is non-NULL return a corresponding array of mangled names + as canonical line specs there. */ + +static struct symtabs_and_lines +decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline, + char ***canonical) +{ + struct symtabs_and_lines values, return_values; + char *args, *arg1; + int i; + char *prompt; + char *symname; + struct cleanup *old_chain; + char **canonical_arr = (char **) NULL; + + values.sals = (struct symtab_and_line *) + alloca (nelts * sizeof (struct symtab_and_line)); + return_values.sals = (struct symtab_and_line *) + xmalloc (nelts * sizeof (struct symtab_and_line)); + old_chain = make_cleanup (xfree, return_values.sals); + + if (canonical) + { + canonical_arr = (char **) xmalloc (nelts * sizeof (char *)); + make_cleanup (xfree, canonical_arr); + memset (canonical_arr, 0, nelts * sizeof (char *)); + *canonical = canonical_arr; + } + + i = 0; + printf_unfiltered ("[0] cancel\n[1] all\n"); + while (i < nelts) + { + INIT_SAL (&return_values.sals[i]); /* initialize to zeroes */ + INIT_SAL (&values.sals[i]); + if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK) + { + values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline); + printf_unfiltered ("[%d] %s at %s:%d\n", + (i + 2), + SYMBOL_SOURCE_NAME (sym_arr[i]), + values.sals[i].symtab->filename, + values.sals[i].line); + } + else + printf_unfiltered ("?HERE\n"); + i++; + } + + if ((prompt = getenv ("PS2")) == NULL) + { + prompt = "> "; + } + args = command_line_input (prompt, 0, "overload-choice"); + + if (args == 0 || *args == 0) + error_no_arg ("one or more choice numbers"); + + i = 0; + while (*args) + { + int num; + + arg1 = args; + while (*arg1 >= '0' && *arg1 <= '9') + arg1++; + if (*arg1 && *arg1 != ' ' && *arg1 != '\t') + error ("Arguments must be choice numbers."); + + num = atoi (args); + + if (num == 0) + error ("canceled"); + else if (num == 1) + { + if (canonical_arr) + { + for (i = 0; i < nelts; i++) + { + if (canonical_arr[i] == NULL) + { + symname = SYMBOL_NAME (sym_arr[i]); + canonical_arr[i] = savestring (symname, strlen (symname)); + } + } + } + memcpy (return_values.sals, values.sals, + (nelts * sizeof (struct symtab_and_line))); + return_values.nelts = nelts; + discard_cleanups (old_chain); + return return_values; + } + + if (num >= nelts + 2) + { + printf_unfiltered ("No choice number %d.\n", num); + } + else + { + num -= 2; + if (values.sals[num].pc) + { + if (canonical_arr) + { + symname = SYMBOL_NAME (sym_arr[num]); + make_cleanup (xfree, symname); + canonical_arr[i] = savestring (symname, strlen (symname)); + } + return_values.sals[i++] = values.sals[num]; + values.sals[num].pc = 0; + } + else + { + printf_unfiltered ("duplicate request for %d ignored.\n", num); + } + } + + args = arg1; + while (*args == ' ' || *args == '\t') + args++; + } + return_values.nelts = i; + discard_cleanups (old_chain); + return return_values; +} + +/* The parser of linespec itself. */ + +/* Parse a string that specifies a line number. + Pass the address of a char * variable; that variable will be + advanced over the characters actually parsed. + + The string can be: + + LINENUM -- that line number in current file. PC returned is 0. + FILE:LINENUM -- that line in that file. PC returned is 0. + FUNCTION -- line number of openbrace of that function. + PC returned is the start of the function. + VARIABLE -- line number of definition of that variable. + PC returned is 0. + FILE:FUNCTION -- likewise, but prefer functions in that file. + *EXPR -- line in which address EXPR appears. + + This may all be followed by an "if EXPR", which we ignore. + + FUNCTION may be an undebuggable function found in minimal symbol table. + + If the argument FUNFIRSTLINE is nonzero, we want the first line + of real code inside a function when a function is specified, and it is + not OK to specify a variable or type to get its line number. + + DEFAULT_SYMTAB specifies the file to use if none is specified. + It defaults to current_source_symtab. + DEFAULT_LINE specifies the line number to use for relative + line numbers (that start with signs). Defaults to current_source_line. + If CANONICAL is non-NULL, store an array of strings containing the canonical + line specs there if necessary. Currently overloaded member functions and + line numbers or static functions without a filename yield a canonical + line spec. The array and the line spec strings are allocated on the heap, + it is the callers responsibility to free them. + + Note that it is possible to return zero for the symtab + if no file is validly specified. Callers must check that. + Also, the line number returned may be invalid. */ + +/* We allow single quotes in various places. This is a hideous + kludge, which exists because the completer can't yet deal with the + lack of single quotes. FIXME: write a linespec_completer which we + can use as appropriate instead of make_symbol_completion_list. */ + +struct symtabs_and_lines +decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, + int default_line, char ***canonical) +{ + struct symtabs_and_lines values; + struct symtab_and_line val; + register char *p, *p1; + char *q, *pp, *ii, *p2; +#if 0 + char *q1; +#endif + register struct symtab *s; + + register struct symbol *sym; + /* The symtab that SYM was found in. */ + struct symtab *sym_symtab; + + register CORE_ADDR pc; + register struct minimal_symbol *msymbol; + char *copy; + struct symbol *sym_class; + int i1; + int is_quoted; + int is_quote_enclosed; + int has_parens; + int has_if = 0; + int has_comma = 0; + struct symbol **sym_arr; + struct type *t; + char *saved_arg = *argptr; + extern char *gdb_completer_quote_characters; + + INIT_SAL (&val); /* initialize to zeroes */ + + /* Defaults have defaults. */ + + if (default_symtab == 0) + { + default_symtab = current_source_symtab; + default_line = current_source_line; + } + + /* See if arg is *PC */ + + if (**argptr == '*') + { + (*argptr)++; + pc = parse_and_eval_address_1 (argptr); + + values.sals = (struct symtab_and_line *) + xmalloc (sizeof (struct symtab_and_line)); + + values.nelts = 1; + values.sals[0] = find_pc_line (pc, 0); + values.sals[0].pc = pc; + values.sals[0].section = find_pc_overlay (pc); + + return values; + } + + /* 'has_if' is for the syntax: + * (gdb) break foo if (a==b) + */ + if ((ii = strstr (*argptr, " if ")) != NULL || + (ii = strstr (*argptr, "\tif ")) != NULL || + (ii = strstr (*argptr, " if\t")) != NULL || + (ii = strstr (*argptr, "\tif\t")) != NULL || + (ii = strstr (*argptr, " if(")) != NULL || + (ii = strstr (*argptr, "\tif( ")) != NULL) + has_if = 1; + /* Temporarily zap out "if (condition)" to not + * confuse the parenthesis-checking code below. + * This is undone below. Do not change ii!! + */ + if (has_if) + { + *ii = '\0'; + } + + /* Set various flags. + * 'has_parens' is important for overload checking, where + * we allow things like: + * (gdb) break c::f(int) + */ + + /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */ + + is_quoted = (**argptr + && strchr (get_gdb_completer_quote_characters (), + **argptr) != NULL); + + has_parens = ((pp = strchr (*argptr, '(')) != NULL + && (pp = strrchr (pp, ')')) != NULL); + + /* Now that we're safely past the has_parens check, + * put back " if (condition)" so outer layers can see it + */ + if (has_if) + *ii = ' '; + + /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM + and we must isolate the first half. Outer layers will call again later + for the second half. + + Don't count commas that appear in argument lists of overloaded + functions, or in quoted strings. It's stupid to go to this much + trouble when the rest of the function is such an obvious roach hotel. */ + ii = find_toplevel_char (*argptr, ','); + has_comma = (ii != 0); + + /* Temporarily zap out second half to not + * confuse the code below. + * This is undone below. Do not change ii!! + */ + if (has_comma) + { + *ii = '\0'; + } + + /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */ + /* May also be CLASS::MEMBER, or NAMESPACE::NAME */ + /* Look for ':', but ignore inside of <> */ + + s = NULL; + p = *argptr; + if (p[0] == '"') + { + is_quote_enclosed = 1; + (*argptr)++; + p++; + } + else + is_quote_enclosed = 0; + for (; *p; p++) + { + if (p[0] == '<') + { + char *temp_end = find_template_name_end (p); + if (!temp_end) + error ("malformed template specification in command"); + p = temp_end; + } + /* Check for the end of the first half of the linespec. End of line, + a tab, a double colon or the last single colon, or a space. But + if enclosed in double quotes we do not break on enclosed spaces */ + if (!*p + || p[0] == '\t' + || ((p[0] == ':') + && ((p[1] == ':') || (strchr (p + 1, ':') == NULL))) + || ((p[0] == ' ') && !is_quote_enclosed)) + break; + if (p[0] == '.' && strchr (p, ':') == NULL) /* Java qualified method. */ + { + /* Find the *last* '.', since the others are package qualifiers. */ + for (p1 = p; *p1; p1++) + { + if (*p1 == '.') + p = p1; + } + break; + } + } + while (p[0] == ' ' || p[0] == '\t') + p++; + + /* if the closing double quote was left at the end, remove it */ + if (is_quote_enclosed) + { + char *closing_quote = strchr (p - 1, '"'); + if (closing_quote && closing_quote[1] == '\0') + *closing_quote = '\0'; + } + + /* Now that we've safely parsed the first half, + * put back ',' so outer layers can see it + */ + if (has_comma) + *ii = ','; + + if ((p[0] == ':' || p[0] == '.') && !has_parens) + { + /* C++ */ + /* ... or Java */ + if (is_quoted) + *argptr = *argptr + 1; + if (p[0] == '.' || p[1] == ':') + { + char *saved_arg2 = *argptr; + char *temp_end; + /* First check for "global" namespace specification, + of the form "::foo". If found, skip over the colons + and jump to normal symbol processing */ + if (p[0] == ':' + && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t'))) + saved_arg2 += 2; + + /* We have what looks like a class or namespace + scope specification (A::B), possibly with many + levels of namespaces or classes (A::B::C::D). + + Some versions of the HP ANSI C++ compiler (as also possibly + other compilers) generate class/function/member names with + embedded double-colons if they are inside namespaces. To + handle this, we loop a few times, considering larger and + larger prefixes of the string as though they were single + symbols. So, if the initially supplied string is + A::B::C::D::foo, we have to look up "A", then "A::B", + then "A::B::C", then "A::B::C::D", and finally + "A::B::C::D::foo" as single, monolithic symbols, because + A, B, C or D may be namespaces. + + Note that namespaces can nest only inside other + namespaces, and not inside classes. So we need only + consider *prefixes* of the string; there is no need to look up + "B::C" separately as a symbol in the previous example. */ + + p2 = p; /* save for restart */ + while (1) + { + /* Extract the class name. */ + p1 = p; + while (p != *argptr && p[-1] == ' ') + --p; + copy = (char *) alloca (p - *argptr + 1); + memcpy (copy, *argptr, p - *argptr); + copy[p - *argptr] = 0; + + /* Discard the class name from the arg. */ + p = p1 + (p1[0] == ':' ? 2 : 1); + while (*p == ' ' || *p == '\t') + p++; + *argptr = p; + + sym_class = lookup_symbol (copy, 0, STRUCT_NAMESPACE, 0, + (struct symtab **) NULL); + + if (sym_class && + (t = check_typedef (SYMBOL_TYPE (sym_class)), + (TYPE_CODE (t) == TYPE_CODE_STRUCT + || TYPE_CODE (t) == TYPE_CODE_UNION))) + { + /* Arg token is not digits => try it as a function name + Find the next token(everything up to end or next blank). */ + if (**argptr + && strchr (get_gdb_completer_quote_characters (), + **argptr) != NULL) + { + p = skip_quoted (*argptr); + *argptr = *argptr + 1; + } + else + { + p = *argptr; + while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':') + p++; + } +/* + q = operator_chars (*argptr, &q1); + if (q1 - q) + { + char *opname; + char *tmp = alloca (q1 - q + 1); + memcpy (tmp, q, q1 - q); + tmp[q1 - q] = '\0'; + opname = cplus_mangle_opname (tmp, DMGL_ANSI); + if (opname == NULL) + { + cplusplus_error (saved_arg, "no mangling for \"%s\"\n", tmp); + } + copy = (char*) alloca (3 + strlen(opname)); + sprintf (copy, "__%s", opname); + p = q1; + } + else + */ + { + copy = (char *) alloca (p - *argptr + 1); + memcpy (copy, *argptr, p - *argptr); + copy[p - *argptr] = '\0'; + if (p != *argptr + && copy[p - *argptr - 1] + && strchr (get_gdb_completer_quote_characters (), + copy[p - *argptr - 1]) != NULL) + copy[p - *argptr - 1] = '\0'; + } + + /* no line number may be specified */ + while (*p == ' ' || *p == '\t') + p++; + *argptr = p; + + sym = 0; + i1 = 0; /* counter for the symbol array */ + sym_arr = (struct symbol **) alloca (total_number_of_methods (t) + * sizeof (struct symbol *)); + + if (destructor_name_p (copy, t)) + { + /* Destructors are a special case. */ + int m_index, f_index; + + if (get_destructor_fn_field (t, &m_index, &f_index)) + { + struct fn_field *f = TYPE_FN_FIELDLIST1 (t, m_index); + + sym_arr[i1] = + lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, f_index), + NULL, VAR_NAMESPACE, (int *) NULL, + (struct symtab **) NULL); + if (sym_arr[i1]) + i1++; + } + } + else + i1 = find_methods (t, copy, sym_arr); + if (i1 == 1) + { + /* There is exactly one field with that name. */ + sym = sym_arr[0]; + + if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) + { + values.sals = (struct symtab_and_line *) + xmalloc (sizeof (struct symtab_and_line)); + values.nelts = 1; + values.sals[0] = find_function_start_sal (sym, + funfirstline); + } + else + { + values.nelts = 0; + } + return values; + } + if (i1 > 0) + { + /* There is more than one field with that name + (overloaded). Ask the user which one to use. */ + return decode_line_2 (sym_arr, i1, funfirstline, canonical); + } + else + { + char *tmp; + + if (is_operator_name (copy)) + { + tmp = (char *) alloca (strlen (copy + 3) + 9); + strcpy (tmp, "operator "); + strcat (tmp, copy + 3); + } + else + tmp = copy; + if (tmp[0] == '~') + cplusplus_error (saved_arg, + "the class `%s' does not have destructor defined\n", + SYMBOL_SOURCE_NAME (sym_class)); + else + cplusplus_error (saved_arg, + "the class %s does not have any method named %s\n", + SYMBOL_SOURCE_NAME (sym_class), tmp); + } + } + + /* Move pointer up to next possible class/namespace token */ + p = p2 + 1; /* restart with old value +1 */ + /* Move pointer ahead to next double-colon */ + while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\'')) + { + if (p[0] == '<') + { + temp_end = find_template_name_end (p); + if (!temp_end) + error ("malformed template specification in command"); + p = temp_end; + } + else if ((p[0] == ':') && (p[1] == ':')) + break; /* found double-colon */ + else + p++; + } + + if (*p != ':') + break; /* out of the while (1) */ + + p2 = p; /* save restart for next time around */ + *argptr = saved_arg2; /* restore argptr */ + } /* while (1) */ + + /* Last chance attempt -- check entire name as a symbol */ + /* Use "copy" in preparation for jumping out of this block, + to be consistent with usage following the jump target */ + copy = (char *) alloca (p - saved_arg2 + 1); + memcpy (copy, saved_arg2, p - saved_arg2); + /* Note: if is_quoted should be true, we snuff out quote here anyway */ + copy[p - saved_arg2] = '\000'; + /* Set argptr to skip over the name */ + *argptr = (*p == '\'') ? p + 1 : p; + /* Look up entire name */ + sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab); + s = (struct symtab *) 0; + /* Prepare to jump: restore the " if (condition)" so outer layers see it */ + /* Symbol was found --> jump to normal symbol processing. + Code following "symbol_found" expects "copy" to have the + symbol name, "sym" to have the symbol pointer, "s" to be + a specified file's symtab, and sym_symtab to be the symbol's + symtab. */ + /* By jumping there we avoid falling through the FILE:LINE and + FILE:FUNC processing stuff below */ + if (sym) + goto symbol_found; + + /* Couldn't find any interpretation as classes/namespaces, so give up */ + /* The quotes are important if copy is empty. */ + cplusplus_error (saved_arg, + "Can't find member of namespace, class, struct, or union named \"%s\"\n", + copy); + } + /* end of C++ */ + + + /* Extract the file name. */ + p1 = p; + while (p != *argptr && p[-1] == ' ') + --p; + if ((*p == '"') && is_quote_enclosed) + --p; + copy = (char *) alloca (p - *argptr + 1); + if ((**argptr == '"') && is_quote_enclosed) + { + memcpy (copy, *argptr + 1, p - *argptr - 1); + /* It may have the ending quote right after the file name */ + if (copy[p - *argptr - 2] == '"') + copy[p - *argptr - 2] = 0; + else + copy[p - *argptr - 1] = 0; + } + else + { + memcpy (copy, *argptr, p - *argptr); + copy[p - *argptr] = 0; + } + + /* Find that file's data. */ + s = lookup_symtab (copy); + if (s == 0) + { + if (!have_full_symbols () && !have_partial_symbols ()) + error ("No symbol table is loaded. Use the \"file\" command."); + error ("No source file named %s.", copy); + } + + /* Discard the file name from the arg. */ + p = p1 + 1; + while (*p == ' ' || *p == '\t') + p++; + *argptr = p; + } +#if 0 + /* No one really seems to know why this was added. It certainly + breaks the command line, though, whenever the passed + name is of the form ClassName::Method. This bit of code + singles out the class name, and if funfirstline is set (for + example, you are setting a breakpoint at this function), + you get an error. This did not occur with earlier + verions, so I am ifdef'ing this out. 3/29/99 */ + else + { + /* Check if what we have till now is a symbol name */ + + /* We may be looking at a template instantiation such + as "foo<int>". Check here whether we know about it, + instead of falling through to the code below which + handles ordinary function names, because that code + doesn't like seeing '<' and '>' in a name -- the + skip_quoted call doesn't go past them. So see if we + can figure it out right now. */ + + copy = (char *) alloca (p - *argptr + 1); + memcpy (copy, *argptr, p - *argptr); + copy[p - *argptr] = '\000'; + sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab); + if (sym) + { + /* Yes, we have a symbol; jump to symbol processing */ + /* Code after symbol_found expects S, SYM_SYMTAB, SYM, + and COPY to be set correctly */ + *argptr = (*p == '\'') ? p + 1 : p; + s = (struct symtab *) 0; + goto symbol_found; + } + /* Otherwise fall out from here and go to file/line spec + processing, etc. */ + } +#endif + + /* S is specified file's symtab, or 0 if no file specified. + arg no longer contains the file name. */ + + /* Check whether arg is all digits (and sign) */ + + q = *argptr; + if (*q == '-' || *q == '+') + q++; + while (*q >= '0' && *q <= '9') + q++; + + if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')) + { + /* We found a token consisting of all digits -- at least one digit. */ + enum sign + { + none, plus, minus + } + sign = none; + + /* We might need a canonical line spec if no file was specified. */ + int need_canonical = (s == 0) ? 1 : 0; + + /* This is where we need to make sure that we have good defaults. + We must guarantee that this section of code is never executed + when we are called with just a function name, since + select_source_symtab calls us with such an argument */ + + if (s == 0 && default_symtab == 0) + { + select_source_symtab (0); + default_symtab = current_source_symtab; + default_line = current_source_line; + } + + if (**argptr == '+') + sign = plus, (*argptr)++; + else if (**argptr == '-') + sign = minus, (*argptr)++; + val.line = atoi (*argptr); + switch (sign) + { + case plus: + if (q == *argptr) + val.line = 5; + if (s == 0) + val.line = default_line + val.line; + break; + case minus: + if (q == *argptr) + val.line = 15; + if (s == 0) + val.line = default_line - val.line; + else + val.line = 1; + break; + case none: + break; /* No need to adjust val.line. */ + } + + while (*q == ' ' || *q == '\t') + q++; + *argptr = q; + if (s == 0) + s = default_symtab; + + /* It is possible that this source file has more than one symtab, + and that the new line number specification has moved us from the + default (in s) to a new one. */ + val.symtab = find_line_symtab (s, val.line, NULL, NULL); + if (val.symtab == 0) + val.symtab = s; + + val.pc = 0; + values.sals = (struct symtab_and_line *) + xmalloc (sizeof (struct symtab_and_line)); + values.sals[0] = val; + values.nelts = 1; + if (need_canonical) + build_canonical_line_spec (values.sals, NULL, canonical); + return values; + } + + /* Arg token is not digits => try it as a variable name + Find the next token (everything up to end or next whitespace). */ + + if (**argptr == '$') /* May be a convenience variable */ + p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1)); /* One or two $ chars possible */ + else if (is_quoted) + { + p = skip_quoted (*argptr); + if (p[-1] != '\'') + error ("Unmatched single quote."); + } + else if (has_parens) + { + p = pp + 1; + } + else + { + p = skip_quoted (*argptr); + } + + copy = (char *) alloca (p - *argptr + 1); + memcpy (copy, *argptr, p - *argptr); + copy[p - *argptr] = '\0'; + if (p != *argptr + && copy[0] + && copy[0] == copy[p - *argptr - 1] + && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL) + { + copy[p - *argptr - 1] = '\0'; + copy++; + } + while (*p == ' ' || *p == '\t') + p++; + *argptr = p; + + /* If it starts with $: may be a legitimate variable or routine name + (e.g. HP-UX millicode routines such as $$dyncall), or it may + be history value, or it may be a convenience variable */ + + if (*copy == '$') + { + struct value *valx; + int index = 0; + int need_canonical = 0; + + p = (copy[1] == '$') ? copy + 2 : copy + 1; + while (*p >= '0' && *p <= '9') + p++; + if (!*p) /* reached end of token without hitting non-digit */ + { + /* We have a value history reference */ + sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index); + valx = access_value_history ((copy[1] == '$') ? -index : index); + if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT) + error ("History values used in line specs must have integer values."); + } + else + { + /* Not all digits -- may be user variable/function or a + convenience variable */ + + /* Look up entire name as a symbol first */ + sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab); + s = (struct symtab *) 0; + need_canonical = 1; + /* Symbol was found --> jump to normal symbol processing. + Code following "symbol_found" expects "copy" to have the + symbol name, "sym" to have the symbol pointer, "s" to be + a specified file's symtab, and sym_symtab to be the symbol's + symtab. */ + if (sym) + goto symbol_found; + + /* If symbol was not found, look in minimal symbol tables */ + msymbol = lookup_minimal_symbol (copy, NULL, NULL); + /* Min symbol was found --> jump to minsym processing. */ + if (msymbol) + goto minimal_symbol_found; + + /* Not a user variable or function -- must be convenience variable */ + need_canonical = (s == 0) ? 1 : 0; + valx = value_of_internalvar (lookup_internalvar (copy + 1)); + if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT) + error ("Convenience variables used in line specs must have integer values."); + } + + /* Either history value or convenience value from above, in valx */ + val.symtab = s ? s : default_symtab; + val.line = value_as_long (valx); + val.pc = 0; + + values.sals = (struct symtab_and_line *) xmalloc (sizeof val); + values.sals[0] = val; + values.nelts = 1; + + if (need_canonical) + build_canonical_line_spec (values.sals, NULL, canonical); + + return values; + } + + + /* Look up that token as a variable. + If file specified, use that file's per-file block to start with. */ + + sym = lookup_symbol (copy, + (s ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK) + : get_selected_block ()), + VAR_NAMESPACE, 0, &sym_symtab); + +symbol_found: /* We also jump here from inside the C++ class/namespace + code on finding a symbol of the form "A::B::C" */ + + if (sym != NULL) + { + if (SYMBOL_CLASS (sym) == LOC_BLOCK) + { + /* Arg is the name of a function */ + values.sals = (struct symtab_and_line *) + xmalloc (sizeof (struct symtab_and_line)); + values.sals[0] = find_function_start_sal (sym, funfirstline); + values.nelts = 1; + + /* Don't use the SYMBOL_LINE; if used at all it points to + the line containing the parameters or thereabouts, not + the first line of code. */ + + /* We might need a canonical line spec if it is a static + function. */ + if (s == 0) + { + struct blockvector *bv = BLOCKVECTOR (sym_symtab); + struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); + if (lookup_block_symbol (b, copy, VAR_NAMESPACE) != NULL) + build_canonical_line_spec (values.sals, copy, canonical); + } + return values; + } + else + { + if (funfirstline) + error ("\"%s\" is not a function", copy); + else if (SYMBOL_LINE (sym) != 0) + { + /* We know its line number. */ + values.sals = (struct symtab_and_line *) + xmalloc (sizeof (struct symtab_and_line)); + values.nelts = 1; + memset (&values.sals[0], 0, sizeof (values.sals[0])); + values.sals[0].symtab = sym_symtab; + values.sals[0].line = SYMBOL_LINE (sym); + return values; + } + else + /* This can happen if it is compiled with a compiler which doesn't + put out line numbers for variables. */ + /* FIXME: Shouldn't we just set .line and .symtab to zero + and return? For example, "info line foo" could print + the address. */ + error ("Line number not known for symbol \"%s\"", copy); + } + } + + msymbol = lookup_minimal_symbol (copy, NULL, NULL); + +minimal_symbol_found: /* We also jump here from the case for variables + that begin with '$' */ + + if (msymbol != NULL) + { + values.sals = (struct symtab_and_line *) + xmalloc (sizeof (struct symtab_and_line)); + values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol), + (struct sec *) 0, 0); + values.sals[0].section = SYMBOL_BFD_SECTION (msymbol); + if (funfirstline) + { + values.sals[0].pc += FUNCTION_START_OFFSET; + values.sals[0].pc = SKIP_PROLOGUE (values.sals[0].pc); + } + values.nelts = 1; + return values; + } + + if (!have_full_symbols () && + !have_partial_symbols () && !have_minimal_symbols ()) + error ("No symbol table is loaded. Use the \"file\" command."); + + error ("Function \"%s\" not defined.", copy); + return values; /* for lint */ +} |
