diff options
Diffstat (limited to 'contrib/perl5/ext/B/ramblings')
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/cc.notes | 32 | ||||
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/curcop.runtime | 39 | ||||
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/flip-flop | 54 | ||||
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/magic | 93 | ||||
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/reg.alloc | 32 | ||||
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/runtime.porting | 357 |
6 files changed, 0 insertions, 607 deletions
diff --git a/contrib/perl5/ext/B/ramblings/cc.notes b/contrib/perl5/ext/B/ramblings/cc.notes deleted file mode 100644 index 47bd65a..0000000 --- a/contrib/perl5/ext/B/ramblings/cc.notes +++ /dev/null @@ -1,32 +0,0 @@ -At entry to each basic block, the following can be assumed (and hence -must be forced where necessary at the end of each basic block): - -The shadow stack @stack is empty. -For each lexical object in @pad, VALID_IV holds for each T_INT, -VALID_DOUBLE holds for each T_DOUBLE and VALID_SV holds otherwise. -The C shadow variable sp holds the stack pointer (not necessarily stack_sp). - -write_back_stack - Writes the contents of the shadow stack @stack back to the real stack. - A write-back of each object in the stack is forced so that its - backing SV contains the right value and that SV is then pushed onto the - real stack. On return, @stack is empty. - -write_back_lexicals - Forces a write-back (i.e. achieves VALID_SV), where necessary, for each - lexical object in @pad. Objects with the TEMPORARY flag are skipped. If - write_back_lexicals is called with an (optional) argument, then it is - taken to be a bitmask of more flags: any lexical object with one of those - flags set is also skipped and not written back to its SV. - -invalidate_lexicals($avoid) - The VALID_INT and VALID_DOUBLE flags are turned off for each lexical - object in @pad whose flags field doesn't overlap with $avoid. - -reload_lexicals - For each necessary lexical object in @pad, makes sure that VALID_IV - holds for objects of type T_INT, VALID_DOUBLE holds for objects for - type T_DOUBLE, and VALID_SV holds for other objects. An object is - considered for reloading if its flags field does not overlap with the - (optional) argument passed to reload_lexicals. - diff --git a/contrib/perl5/ext/B/ramblings/curcop.runtime b/contrib/perl5/ext/B/ramblings/curcop.runtime deleted file mode 100644 index 9b8b7d5..0000000 --- a/contrib/perl5/ext/B/ramblings/curcop.runtime +++ /dev/null @@ -1,39 +0,0 @@ -PP code uses of curcop ----------------------- - -pp_rv2gv - when a new glob is created for an OPpLVAL_INTRO, - curcop->cop_line is stored as GvLINE() in the new GP. -pp_bless - curcop->cop_stash is used as the stash in the one-arg form of bless - -pp_repeat - tests (curcop != &compiling) to warn "Can't x= to readonly value" - -pp_pos -pp_substr -pp_index -pp_rindex -pp_aslice -pp_lslice -pp_splice - curcop->cop_arybase - -pp_sort - curcop->cop_stash used to determine whether to gv_fetchpv $a and $b - -pp_caller - tests (curcop->cop_stash == debstash) to determine whether - to set DB::args - -pp_reset - resets vars in curcop->cop_stash - -pp_dbstate - sets curcop = (COP*)op - -doeval - compiles into curcop->cop_stash - -pp_nextstate - sets curcop = (COP*)op diff --git a/contrib/perl5/ext/B/ramblings/flip-flop b/contrib/perl5/ext/B/ramblings/flip-flop deleted file mode 100644 index e08333d..0000000 --- a/contrib/perl5/ext/B/ramblings/flip-flop +++ /dev/null @@ -1,54 +0,0 @@ -PP(pp_range) -{ - if (GIMME == G_ARRAY) - return NORMAL; - if (SvTRUEx(PAD_SV(PL_op->op_targ))) - return cLOGOP->op_other; - else - return NORMAL; -} - -pp_range is a LOGOP. -In list context, it just returns op_next. -In scalar context it checks the truth of targ and returns -op_other if true, op_next if false. - -flip is an UNOP. -It "looks after" its child which is always a pp_range LOGOP. -In list context, it just returns the child's op_other. -In scalar context, there are three possible outcomes: - (1) set child's targ to 1, our targ to 1 and return op_next. - (2) set child's targ to 1, our targ to 0, sp-- and return child's op_other. - (3) Blank targ and TOPs and return op_next. -Case 1 happens for a "..." with a matching lineno... or true TOPs. -Case 2 happens for a ".." with a matching lineno... or true TOPs. -Case 3 happens for a non-matching lineno or false TOPs. - - $a = lhs..rhs; - - ,-------> range - ^ / \ - | true/ \false - | / \ - first| lhs rhs - | \ first / - ^--- flip <----- flop - \ / - \ / - sassign - - -/* range */ -if (SvTRUE(curpad[op->op_targ])) - goto label(op_other); -/* op_next */ -... -/* flip */ -/* For "..." returns op_next. For ".." returns op_next or op_first->op_other */ -/* end of basic block */ -goto out; -label(range op_other): -... -/* flop */ -out: -... diff --git a/contrib/perl5/ext/B/ramblings/magic b/contrib/perl5/ext/B/ramblings/magic deleted file mode 100644 index e41930a..0000000 --- a/contrib/perl5/ext/B/ramblings/magic +++ /dev/null @@ -1,93 +0,0 @@ -sv_magic() ----------- -av.c -av_store() - Storing a non-undef element into an SMAGICAL array, av, - assigns the equivalent lowercase form of magic (of the first - MAGIC in the chain) to the value (with obj = av, name = 0 and - namlen = array index). - -gv.c -gv_init() - Initialising gv assigns '*' magic to it with obj = gv, name = - GvNAME and namlen = GvNAMELEN. -gv_fetchpv() - @ISA gets 'I' magic with obj = gv, zero name and namlen. - %OVERLOAD gets 'A' magic with obj = gv, zero name and namlen. - $1 to $9, $&, $`, $', $+ get '\0' magic with obj = gv, - name = GvNAME and namlen = len ( = 1 presumably). -Gv_AMupdate() - Stashes for overload magic seem to get 'c' magic with obj = 0, - name = &amt and namlen = sizeof(amt). -hv_magic(hv, gv, how) - Gives magic how to hv with obj = gv and zero name and namlen. - -mg.c -mg_copy(sv, nsv, key, klen) - Traverses the magic chain of sv. Upper case forms of magic - (only) are copied across to nsv, preserving obj but using - name = key and namlen = klen. -magic_setpos() - LvTARG of a PVLV gets 'g' magic with obj = name = 0 and namlen = pos. - -op.c -mod() - PVLV operators give magic to their targs with - obj = name = namlen = 0. OP_POS gives '.', OP_VEC gives 'v' - and OP_SUBSTR gives 'x'. - -perl.c -magicname(sym, name, namlen) - Fetches/creates a GV with name sym and gives it '\0' magic - with obj = gv, name and namlen as passed. -init_postdump_symbols() - Elements of the environment get given SVs with 'e' magic. - obj = sv and name and namlen point to the actual string - within env. - -pp.c -pp_av2arylen() - $#foo gives '#' magic to the new SV with obj = av and - name = namlen = 0. -pp_study() - SV gets 'g' magic with obj = name = namlen = 0. -pp_substr() - PVLV gets 'x' magic with obj = name = namlen = 0. -pp_vec() - PVLV gets 'x' magic with obj = name = namlen = 0. - -pp_hot.c -pp_match() - m//g gets 'g' magic with obj = name = namlen = 0. - -pp_sys.c -pp_tie() - sv gets magic with obj = sv and name = namlen = 0. - If an HV or an AV, it gets 'P' magic, otherwise 'q' magic. -pp_dbmopen() - 'P' magic for the HV just as with pp_tie(). -pp_sysread() - If tainting, the buffer SV gets 't' magic with - obj = name = namlen = 0. - -sv.c -sv_setsv() - Doing sv_setsv(dstr, gv) gives '*' magic to dstr with - obj = dstr, name = GvNAME, namlen = GvNAMELEN. - -util.c -fbm_compile() - The PVBM gets 'B' magic with obj = name = namlen = 0 and SvVALID - is set to indicate that the Boyer-Moore table is valid. - magic_setbm() just clears the SvVALID flag. - -hv_magic() ----------- - -gv.c -gv_fetchfile() - With perldb, the HV of a gvfile gv gets 'L' magic with obj = gv. -gv_fetchpv() - %SIG gets 'S' magic with obj = siggv. -init_postdump_symbols() - %ENV gets 'E' magic with obj = envgv. diff --git a/contrib/perl5/ext/B/ramblings/reg.alloc b/contrib/perl5/ext/B/ramblings/reg.alloc deleted file mode 100644 index 7fd69f2..0000000 --- a/contrib/perl5/ext/B/ramblings/reg.alloc +++ /dev/null @@ -1,32 +0,0 @@ -while ($i--) { - foo(); -} -exit - - PP code if i an int register if i an int but not a - (i.e. can't be register (i.e. can be - implicitly invalidated) implicitly invalidated) - nextstate - enterloop - - - loop: - gvsv GV (0xe6078) *i validates i validates i - postdec invalidates $i invalidates $i - and if_false goto out; - i valid; $i invalid i valid; $i invalid - - i valid; $i invalid i valid; $i invalid - nextstate - pushmark - gv GV (0xe600c) *foo - entersub validates $i; invals i - - unstack - goto loop: - - i valid; $i invalid - out: - leaveloop - nextstate - exit diff --git a/contrib/perl5/ext/B/ramblings/runtime.porting b/contrib/perl5/ext/B/ramblings/runtime.porting deleted file mode 100644 index d58b011..0000000 --- a/contrib/perl5/ext/B/ramblings/runtime.porting +++ /dev/null @@ -1,357 +0,0 @@ -Notes on porting the perl runtime PP engine. -Importance: 1 = who cares?, 10 = vital -Difficulty: 1 = trivial, 10 = very difficult. Level assumes a -reasonable implementation of the SV and OP API already ported. - -OP Import Diff Comments -null 10 1 -stub 10 1 -scalar 10 1 -pushmark 10 1 PUSHMARK -wantarray 7 3 cxstack, dopoptosub -const 10 1 -gvsv 10 1 save_scalar -gv 10 1 -gelem 3 3 -padsv 10 2 SAVECLEARSV, provide_ref -padav 10 2 -padhv 10 2 -padany 1 1 -pushre 7 3 pushes an op. Blech. -rv2gv 6 5 -rv2sv 10 4 -av2arylen 7 3 sv_magic -rv2cv 8 5 sv_2cv -anoncode 7 6 cv_clone -prototype 4 4 sv_2cv -refgen 8 3 -srefgen 8 2 -ref 8 3 -bless 7 3 -backtick 5 4 -glob 5 2 do_readline -readline 8 2 do_readline -rcatline 8 2 -regcmaybe 8 1 -regcreset 8 1 -regcomp 8 9 pregcomp -match 8 10 -qr 8 1 -subst 8 10 -substcont 8 7 -trans 7 4 do_trans -sassign 10 3 mg_find, SvSETMAGIC -aassign 10 5 -chop 8 3 do_chop -schop 8 3 do_chop -chomp 8 3 do_chomp -schomp 8 3 do_chomp -defined 10 2 -undef 10 3 -study 4 5 -pos 8 3 PVLV, mg_find -preinc 10 2 sv_inc, SvSETMAGIC -i_preinc -predec 10 2 sv_dec, SvSETMAGIC -i_predec -postinc 10 2 sv_dec, SvSETMAGIC -i_postinc -postdec 10 2 sv_dec, SvSETMAGIC -i_postdec -pow 10 1 -multiply 10 1 -i_multiply 10 1 -divide 10 2 -i_divide 10 1 -modulo 10 2 -i_modulo 10 1 -repeat 6 4 -add 10 1 -i_add 10 1 -subtract 10 1 -i_subtract 10 1 -concat 10 2 mg_get -stringify 10 2 sv_setpvn -left_shift 10 1 -right_shift 10 1 -lt 10 1 -i_lt 10 1 -gt 10 1 -i_gt 10 1 -le 10 1 -i_le 10 1 -ge 10 1 -i_ge 10 1 -eq 10 1 -i_eq 10 1 -ne 10 1 -i_ne 10 1 -ncmp 10 1 -i_ncmp 10 1 -slt 10 2 -sgt 10 2 -sle 10 2 -sge 10 2 -seq 10 2 sv_eq -sne 10 2 -scmp 10 2 -bit_and 10 2 -bit_xor 10 2 -bit_or 10 2 -negate 10 3 -i_negate 10 1 -not 10 1 -complement 10 3 -atan2 6 1 -sin 6 1 -cos 6 1 -rand 5 2 -srand 5 2 -exp 6 1 -log 6 2 -sqrt 6 2 -int 10 2 -hex 9 2 -oct 9 2 -abs 10 1 -length 10 1 -substr 10 4 PVLV -vec 5 4 -index 9 3 -rindex 9 3 -sprintf 9 4 do_sprintf -formline 6 7 -ord 6 2 -chr 6 2 -crypt 3 2 -ucfirst 6 2 -lcfirst 6 2 -uc 6 2 -lc 6 2 -quotemeta 6 3 -rv2av 10 3 save_svref, mg_get, save_ary -aelemfast 10 2 av_fetch -aelem 10 3 -aslice 9 4 -each 10 3 hv_iternext -values 10 3 do_kv -keys 10 3 do_kv -delete 10 3 -exists 10 3 -rv2hv 10 3 save_svref, mg_get, save_ary, do_kv -helem 10 3 save_svref, provide_ref -hslice 9 4 -unpack 9 6 lengthy -pack 9 6 lengthy -split 9 9 -join 10 4 do_join -list 10 2 -lslice 9 4 -anonlist 10 2 -anonhash 10 3 -splice 9 6 -push 10 2 -pop 10 2 -shift 10 2 -unshift 10 2 -sort 6 7 -reverse 9 4 -grepstart 6 5 modifies flow of control -grepwhile 6 5 modifies flow of control -mapstart 1 1 -mapwhile 6 5 modifies flow of control -range 7 3 modifies flow of control -flip 7 4 modifies flow of control -flop 7 4 modifies flow of control -and 10 3 modifies flow of control -or 10 3 modifies flow of control -xor -cond_expr 10 3 modifies flow of control -andassign 7 3 modifies flow of control -orassign 7 3 modifies flow of control -method 8 5 -entersub 10 7 -leavesub 10 5 -leavesublv -caller 2 8 -warn 9 3 -die 9 3 -reset 2 2 -lineseq 1 1 -nextstate 10 1 Update stack_sp from cxstack. FREETMPS. -dbstate 3 7 -unstack -enter 10 3 cxstack, ENTER, SAVETMPS, PUSHBLOCK -leave 10 3 cxstack, SAVETMPS, LEAVE, POPBLOCK -scope 1 1 -enteriter 9 4 cxstack -iter 9 3 cxstack -enterloop 10 4 -leaveloop 10 4 -return 10 5 -last 9 6 -next 9 6 -redo 9 6 -dump 1 9 pp_goto -goto 6 9 -exit 9 2 my_exit -open 9 5 do_open -close 9 3 do_close -pipe_op 7 4 -fileno 9 2 -umask 4 2 -binmode 4 2 -tie 5 5 pp_entersub -untie 5 2 sv_unmagic -tied 5 2 -dbmopen 4 5 -dbmclose 4 2 -sselect 4 4 -select 7 3 -getc 7 2 -read 8 2 pp_sysread -enterwrite 4 4 doform -leavewrite 4 5 -prtf 4 4 do_sprintf -print 8 6 -sysopen 8 2 -sysseek 8 2 -sysread 8 4 -syswrite 8 4 pp_send -send 8 4 -recv 8 4 pp_sysread -eof 9 2 -tell 9 3 -seek 9 2 -truncate 8 3 -fcntl 8 4 pp_ioctl -ioctl 8 4 -flock 8 2 -socket 5 3 -sockpair 5 3 -bind 5 3 -connect 5 3 -listen 5 3 -accept 5 3 -shutdown 5 2 -gsockopt 5 3 pp_ssockopt -ssockopt 5 3 -getsockname 5 3 pp_getpeername -getpeername 5 3 -lstat 5 4 pp_stat -stat 5 4 lengthy -ftrread 5 2 cando -ftrwrite 5 2 cando -ftrexec 5 2 cando -fteread 5 2 cando -ftewrite 5 2 cando -fteexec 5 2 cando -ftis 5 2 cando -fteowned 5 2 cando -ftrowned 5 2 cando -ftzero 5 2 cando -ftsize 5 2 cando -ftmtime 5 2 cando -ftatime 5 2 cando -ftctime 5 2 cando -ftsock 5 2 cando -ftchr 5 2 cando -ftblk 5 2 cando -ftfile 5 2 cando -ftdir 5 2 cando -ftpipe 5 2 cando -ftlink 5 2 cando -ftsuid 5 2 cando -ftsgid 5 2 cando -ftsvtx 5 2 cando -fttty 5 2 cando -fttext 5 4 -ftbinary 5 4 fttext -chdir -chown -chroot -unlink -chmod -utime -rename -link -symlink -readlink -mkdir -rmdir -open_dir -readdir -telldir -seekdir -rewinddir -closedir -fork -wait -waitpid -system -exec -kill -getppid -getpgrp -setpgrp -getpriority -setpriority -time -tms -localtime -gmtime -alarm -sleep -shmget -shmctl -shmread -shmwrite -msgget -msgctl -msgsnd -msgrcv -semget -semctl -semop -require 6 9 doeval -dofile 6 9 doeval -entereval 6 9 doeval -leaveeval 6 5 -entertry 7 4 modifies flow of control -leavetry 7 3 -ghbyname -ghbyaddr -ghostent -gnbyname -gnbyaddr -gnetent -gpbyname -gpbynumber -gprotoent -gsbyname -gsbyport -gservent -shostent -snetent -sprotoent -sservent -ehostent -enetent -eprotoent -eservent -gpwnam -gpwuid -gpwent -spwent -epwent -ggrnam -ggrgid -ggrent -sgrent -egrent -getlogin -syscall -lock 6 1 -threadsv 6 2 unused if not USE_THREADS -setstate 1 1 currently unused anywhere -method_named 10 2 |
