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Re: [PATCH] Re: [perl #32383] DProf breaks List::Util::shuffle
[p5sagit/p5-mst-13.2.git] / ext / B / B / Bytecode.pm
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1df34986 1# B::Bytecode.pm
2# Copyright (c) 2003 Enache Adrian. All rights reserved.
3# This module is free software; you can redistribute and/or modify
4# it under the same terms as Perl itself.
5
6# Based on the original Bytecode.pm module written by Malcolm Beattie.
059a8bb7 7
1df34986 8package B::Bytecode;
28b605d8 9
eaade9ad 10our $VERSION = '1.01';
11
a798dbf2 12use strict;
1df34986 13use Config;
14use B qw(class main_cv main_root main_start cstring comppadlist
15 defstash curstash begin_av init_av end_av inc_gv warnhook diehook
16 dowarn SVt_PVGV SVt_PVHV OPf_SPECIAL OPf_STACKED OPf_MOD
17 OPpLVAL_INTRO SVf_FAKE SVf_READONLY);
18use B::Asmdata qw(@specialsv_name);
19use B::Assembler qw(asm newasm endasm);
1df34986 20
21#################################################
22
f66c782a 23my ($varix, $opix, $savebegins, %walked, %files, @cloop);
1df34986 24my %strtab = (0,0);
25my %svtab = (0,0);
26my %optab = (0,0);
27my %spectab = (0,0);
1df34986 28my $tix = 1;
29sub asm;
30sub nice ($) { }
f66c782a 31
32BEGIN {
33 my $ithreads = $Config{'useithreads'} eq 'define';
34 eval qq{
35 sub ITHREADS() { $ithreads }
36 sub VERSION() { $] }
37 }; die $@ if $@;
38}
1df34986 39
40#################################################
059a8bb7 41
1df34986 42sub pvstring {
43 my $pv = shift;
44 defined($pv) ? cstring ($pv."\0") : "\"\"";
059a8bb7 45}
a798dbf2 46
1df34986 47sub pvix {
48 my $str = pvstring shift;
49 my $ix = $strtab{$str};
50 defined($ix) ? $ix : do {
51 asm "newpv", $str;
52 asm "stpv", $strtab{$str} = $tix;
53 $tix++;
a798dbf2 54 }
55}
56
1df34986 57sub B::OP::ix {
58 my $op = shift;
59 my $ix = $optab{$$op};
60 defined($ix) ? $ix : do {
f66c782a 61 nice "[".$op->name." $tix]";
566ece03 62 asm "newopx", $op->size | $op->type <<7;
63 $optab{$$op} = $opix = $ix = $tix++;
1df34986 64 $op->bsave($ix);
65 $ix;
a798dbf2 66 }
67}
68
1df34986 69sub B::SPECIAL::ix {
70 my $spec = shift;
71 my $ix = $spectab{$$spec};
72 defined($ix) ? $ix : do {
73 nice '['.$specialsv_name[$$spec].']';
566ece03 74 asm "ldspecsvx", $$spec;
75 $spectab{$$spec} = $varix = $tix++;
1df34986 76 }
a798dbf2 77}
78
1df34986 79sub B::SV::ix {
80 my $sv = shift;
81 my $ix = $svtab{$$sv};
82 defined($ix) ? $ix : do {
83 nice '['.class($sv).']';
566ece03 84 asm "newsvx", $sv->FLAGS;
85 $svtab{$$sv} = $varix = $ix = $tix++;
1df34986 86 $sv->bsave($ix);
87 $ix;
88 }
89}
90
91sub B::GV::ix {
92 my ($gv,$desired) = @_;
93 my $ix = $svtab{$$gv};
94 defined($ix) ? $ix : do {
95 if ($gv->GP) {
96 my ($svix, $avix, $hvix, $cvix, $ioix, $formix);
97 nice "[GV]";
98 my $name = $gv->STASH->NAME . "::" . $gv->NAME;
566ece03 99 asm "gv_fetchpvx", cstring $name;
100 $svtab{$$gv} = $varix = $ix = $tix++;
1df34986 101 asm "sv_flags", $gv->FLAGS;
102 asm "sv_refcnt", $gv->REFCNT;
103 asm "xgv_flags", $gv->GvFLAGS;
104
105 asm "gp_refcnt", $gv->GvREFCNT;
106 asm "load_glob", $ix if $name eq "CORE::GLOBAL::glob";
107 return $ix
108 unless $desired || desired $gv;
109 $svix = $gv->SV->ix;
110 $avix = $gv->AV->ix;
111 $hvix = $gv->HV->ix;
112
566ece03 113 # XXX {{{{
1df34986 114 my $cv = $gv->CV;
115 $cvix = $$cv && defined $files{$cv->FILE} ? $cv->ix : 0;
116 my $form = $gv->FORM;
117 $formix = $$form && defined $files{$form->FILE} ? $form->ix : 0;
118
566ece03 119 $ioix = $name !~ /STDOUT$/ ? $gv->IO->ix : 0;
120 # }}}} XXX
1df34986 121
122 nice "-GV-",
123 asm "ldsv", $varix = $ix unless $ix == $varix;
124 asm "gp_sv", $svix;
125 asm "gp_av", $avix;
126 asm "gp_hv", $hvix;
127 asm "gp_cv", $cvix;
128 asm "gp_io", $ioix;
129 asm "gp_cvgen", $gv->CVGEN;
130 asm "gp_form", $formix;
131 asm "gp_file", pvix $gv->FILE;
132 asm "gp_line", $gv->LINE;
133 asm "formfeed", $svix if $name eq "main::\cL";
134 } else {
135 nice "[GV]";
566ece03 136 asm "newsvx", $gv->FLAGS;
137 $svtab{$$gv} = $varix = $ix = $tix++;
1df34986 138 my $stashix = $gv->STASH->ix;
139 $gv->B::PVMG::bsave($ix);
140 asm "xgv_flags", $gv->GvFLAGS;
141 asm "xgv_stash", $stashix;
142 }
143 $ix;
144 }
a798dbf2 145}
146
1df34986 147sub B::HV::ix {
148 my $hv = shift;
149 my $ix = $svtab{$$hv};
150 defined($ix) ? $ix : do {
151 my ($ix,$i,@array);
152 my $name = $hv->NAME;
153 if ($name) {
154 nice "[STASH]";
566ece03 155 asm "gv_stashpvx", cstring $name;
156 asm "sv_flags", $hv->FLAGS;
157 $svtab{$$hv} = $varix = $ix = $tix++;
1df34986 158 asm "xhv_name", pvix $name;
159 # my $pmrootix = $hv->PMROOT->ix; # XXX
160 asm "ldsv", $varix = $ix unless $ix == $varix;
161 # asm "xhv_pmroot", $pmrootix; # XXX
162 } else {
163 nice "[HV]";
566ece03 164 asm "newsvx", $hv->FLAGS;
165 $svtab{$$hv} = $varix = $ix = $tix++;
1df34986 166 my $stashix = $hv->SvSTASH->ix;
167 for (@array = $hv->ARRAY) {
168 next if $i = not $i;
169 $_ = $_->ix;
170 }
171 nice "-HV-",
172 asm "ldsv", $varix = $ix unless $ix == $varix;
173 ($i = not $i) ? asm ("newpv", pvstring $_) : asm("hv_store", $_)
174 for @array;
1df34986 175 asm "xmg_stash", $stashix;
6a1bf161 176 asm "xhv_riter", $hv->RITER;
1df34986 177 }
178 asm "sv_refcnt", $hv->REFCNT;
1df34986 179 $ix;
a798dbf2 180 }
181}
182
1df34986 183sub B::NULL::ix {
184 my $sv = shift;
185 $$sv ? $sv->B::SV::ix : 0;
059a8bb7 186}
187
1df34986 188sub B::NULL::opwalk { 0 }
a798dbf2 189
1df34986 190#################################################
a798dbf2 191
1df34986 192sub B::NULL::bsave {
193 my ($sv,$ix) = @_;
059a8bb7 194
1df34986 195 nice '-'.class($sv).'-',
196 asm "ldsv", $varix = $ix unless $ix == $varix;
197 asm "sv_refcnt", $sv->REFCNT;
a798dbf2 198}
199
1df34986 200sub B::SV::bsave;
201 *B::SV::bsave = *B::NULL::bsave;
a798dbf2 202
1df34986 203sub B::RV::bsave {
204 my ($sv,$ix) = @_;
205 my $rvix = $sv->RV->ix;
206 $sv->B::NULL::bsave($ix);
207 asm "xrv", $rvix;
a798dbf2 208}
209
1df34986 210sub B::PV::bsave {
211 my ($sv,$ix) = @_;
212 $sv->B::NULL::bsave($ix);
213 asm "newpv", pvstring $sv->PVBM;
214 asm "xpv";
a798dbf2 215}
216
1df34986 217sub B::IV::bsave {
218 my ($sv,$ix) = @_;
219 $sv->B::NULL::bsave($ix);
220 asm "xiv", $sv->IVX;
a798dbf2 221}
222
1df34986 223sub B::NV::bsave {
224 my ($sv,$ix) = @_;
225 $sv->B::NULL::bsave($ix);
226 asm "xnv", sprintf "%.40g", $sv->NVX;
a798dbf2 227}
228
1df34986 229sub B::PVIV::bsave {
230 my ($sv,$ix) = @_;
231 $sv->POK ?
232 $sv->B::PV::bsave($ix):
233 $sv->ROK ?
234 $sv->B::RV::bsave($ix):
235 $sv->B::NULL::bsave($ix);
97d63060 236 # See note below in B::PVNV::bsave
237 return if $sv->isa('B::AV');
238 return if $sv->isa('B::HV');
f66c782a 239 asm "xiv", !ITHREADS && $sv->FLAGS & (SVf_FAKE|SVf_READONLY) ?
1df34986 240 "0 but true" : $sv->IVX;
a798dbf2 241}
242
1df34986 243sub B::PVNV::bsave {
244 my ($sv,$ix) = @_;
245 $sv->B::PVIV::bsave($ix);
fefd4cb9 246 # Magical AVs end up here, but AVs now don't have an NV slot actually
247 # allocated. Hence don't write out assembly to store the NV slot if we're
248 # actually an array.
249 return if $sv->isa('B::AV');
250 # Likewise HVs have no NV slot actually allocated.
251 # I don't think that they can get here, but better safe than sorry
252 return if $sv->isa('B::HV');
1df34986 253 asm "xnv", sprintf "%.40g", $sv->NVX;
a798dbf2 254}
255
1df34986 256sub B::PVMG::domagic {
257 my ($sv,$ix) = @_;
258 nice '-MAGICAL-';
259 my @mglist = $sv->MAGIC;
260 my (@mgix, @namix);
261 for (@mglist) {
262 push @mgix, $_->OBJ->ix;
263 push @namix, $_->PTR->ix if $_->LENGTH == B::HEf_SVKEY;
a798dbf2 264 }
a798dbf2 265
1df34986 266 nice '-'.class($sv).'-',
267 asm "ldsv", $varix = $ix unless $ix == $varix;
268 for (@mglist) {
269 asm "sv_magic", cstring $_->TYPE;
270 asm "mg_obj", shift @mgix;
271 my $length = $_->LENGTH;
272 if ($length == B::HEf_SVKEY) {
273 asm "mg_namex", shift @namix;
274 } elsif ($length) {
275 asm "newpv", pvstring $_->PTR;
276 asm "mg_name";
277 }
a798dbf2 278 }
279}
280
1df34986 281sub B::PVMG::bsave {
282 my ($sv,$ix) = @_;
283 my $stashix = $sv->SvSTASH->ix;
284 $sv->B::PVNV::bsave($ix);
285 asm "xmg_stash", $stashix;
286 $sv->domagic($ix) if $sv->MAGICAL;
287}
288
289sub B::PVLV::bsave {
290 my ($sv,$ix) = @_;
291 my $targix = $sv->TARG->ix;
292 $sv->B::PVMG::bsave($ix);
293 asm "xlv_targ", $targix;
294 asm "xlv_targoff", $sv->TARGOFF;
295 asm "xlv_targlen", $sv->TARGLEN;
296 asm "xlv_type", $sv->TYPE;
297
298}
299
300sub B::BM::bsave {
301 my ($sv,$ix) = @_;
302 $sv->B::PVMG::bsave($ix);
303 asm "xpv_cur", $sv->CUR;
304 asm "xbm_useful", $sv->USEFUL;
305 asm "xbm_previous", $sv->PREVIOUS;
306 asm "xbm_rare", $sv->RARE;
307}
308
309sub B::IO::bsave {
310 my ($io,$ix) = @_;
311 my $topix = $io->TOP_GV->ix;
312 my $fmtix = $io->FMT_GV->ix;
313 my $bottomix = $io->BOTTOM_GV->ix;
314 $io->B::PVMG::bsave($ix);
315 asm "xio_lines", $io->LINES;
316 asm "xio_page", $io->PAGE;
317 asm "xio_page_len", $io->PAGE_LEN;
318 asm "xio_lines_left", $io->LINES_LEFT;
319 asm "xio_top_name", pvix $io->TOP_NAME;
320 asm "xio_top_gv", $topix;
321 asm "xio_fmt_name", pvix $io->FMT_NAME;
322 asm "xio_fmt_gv", $fmtix;
323 asm "xio_bottom_name", pvix $io->BOTTOM_NAME;
324 asm "xio_bottom_gv", $bottomix;
325 asm "xio_subprocess", $io->SUBPROCESS;
326 asm "xio_type", ord $io->IoTYPE;
327 # asm "xio_flags", ord($io->IoFLAGS) & ~32; # XXX XXX
328}
329
330sub B::CV::bsave {
331 my ($cv,$ix) = @_;
332 my $stashix = $cv->STASH->ix;
1df34986 333 my $gvix = $cv->GV->ix;
334 my $padlistix = $cv->PADLIST->ix;
335 my $outsideix = $cv->OUTSIDE->ix;
336 my $constix = $cv->CONST ? $cv->XSUBANY->ix : 0;
566ece03 337 my $startix = $cv->START->opwalk;
338 my $rootix = $cv->ROOT->ix;
1df34986 339
340 $cv->B::PVMG::bsave($ix);
341 asm "xcv_stash", $stashix;
342 asm "xcv_start", $startix;
343 asm "xcv_root", $rootix;
344 asm "xcv_xsubany", $constix;
345 asm "xcv_gv", $gvix;
346 asm "xcv_file", pvix $cv->FILE if $cv->FILE; # XXX AD
347 asm "xcv_padlist", $padlistix;
348 asm "xcv_outside", $outsideix;
349 asm "xcv_flags", $cv->CvFLAGS;
350 asm "xcv_outside_seq", $cv->OUTSIDE_SEQ;
351 asm "xcv_depth", $cv->DEPTH;
352}
353
354sub B::FM::bsave {
355 my ($form,$ix) = @_;
356
357 $form->B::CV::bsave($ix);
358 asm "xfm_lines", $form->LINES;
359}
360
361sub B::AV::bsave {
362 my ($av,$ix) = @_;
363 return $av->B::PVMG::bsave($ix) if $av->MAGICAL;
364 my @array = $av->ARRAY;
365 $_ = $_->ix for @array;
366 my $stashix = $av->SvSTASH->ix;
367
368 nice "-AV-",
369 asm "ldsv", $varix = $ix unless $ix == $varix;
ecd04c98 370 asm "av_extend", $av->MAX if $av->MAX >= 0;
1df34986 371 asm "av_pushx", $_ for @array;
372 asm "sv_refcnt", $av->REFCNT;
1df34986 373 asm "xmg_stash", $stashix;
374}
375
376sub B::GV::desired {
377 my $gv = shift;
378 my ($cv, $form);
379 $files{$gv->FILE} && $gv->LINE
380 || ${$cv = $gv->CV} && $files{$cv->FILE}
381 || ${$form = $gv->FORM} && $files{$form->FILE}
a798dbf2 382}
383
1df34986 384sub B::HV::bwalk {
385 my $hv = shift;
386 return if $walked{$$hv}++;
387 my %stash = $hv->ARRAY;
388 while (my($k,$v) = each %stash) {
389 if ($v->SvTYPE == SVt_PVGV) {
390 my $hash = $v->HV;
391 if ($$hash && $hash->NAME) {
392 $hash->bwalk;
393 }
394 $v->ix(1) if desired $v;
395 } else {
396 nice "[prototype]";
566ece03 397 asm "gv_fetchpvx", cstring $hv->NAME . "::$k";
398 $svtab{$$v} = $varix = $tix;
1df34986 399 $v->bsave($tix++);
566ece03 400 asm "sv_flags", $v->FLAGS;
1df34986 401 }
402 }
a798dbf2 403}
404
1df34986 405######################################################
a798dbf2 406
a798dbf2 407
1df34986 408sub B::OP::bsave_thin {
409 my ($op, $ix) = @_;
410 my $next = $op->next;
411 my $nextix = $optab{$$next};
412 $nextix = 0, push @cloop, $op unless defined $nextix;
413 if ($ix != $opix) {
414 nice '-'.$op->name.'-',
415 asm "ldop", $opix = $ix;
a798dbf2 416 }
1df34986 417 asm "op_next", $nextix;
418 asm "op_targ", $op->targ if $op->type; # tricky
419 asm "op_flags", $op->flags;
420 asm "op_private", $op->private;
a798dbf2 421}
422
1df34986 423sub B::OP::bsave;
424 *B::OP::bsave = *B::OP::bsave_thin;
a798dbf2 425
1df34986 426sub B::UNOP::bsave {
427 my ($op, $ix) = @_;
428 my $name = $op->name;
429 my $flags = $op->flags;
430 my $first = $op->first;
431 my $firstix =
432 $name =~ /fl[io]p/
433 # that's just neat
f66c782a 434 || (!ITHREADS && $name eq 'regcomp')
1df34986 435 # trick for /$a/o in pp_regcomp
436 || $name eq 'rv2sv'
437 && $op->flags & OPf_MOD
438 && $op->private & OPpLVAL_INTRO
439 # change #18774 made my life hard
440 ? $first->ix
441 : 0;
442
443 $op->B::OP::bsave($ix);
444 asm "op_first", $firstix;
445}
446
566ece03 447sub B::BINOP::bsave {
448 my ($op, $ix) = @_;
449 if ($op->name eq 'aassign' && $op->private & B::OPpASSIGN_HASH()) {
450 my $last = $op->last;
451 my $lastix = do {
452 local *B::OP::bsave = *B::OP::bsave_fat;
453 local *B::UNOP::bsave = *B::UNOP::bsave_fat;
454 $last->ix;
455 };
456 asm "ldop", $lastix unless $lastix == $opix;
457 asm "op_targ", $last->targ;
458 $op->B::OP::bsave($ix);
459 asm "op_last", $lastix;
460 } else {
461 $op->B::OP::bsave($ix);
462 }
463}
464
465# not needed if no pseudohashes
466
f66c782a 467*B::BINOP::bsave = *B::OP::bsave if VERSION >= 5.009;
1df34986 468
469# deal with sort / formline
470
471sub B::LISTOP::bsave {
472 my ($op, $ix) = @_;
473 my $name = $op->name;
f66c782a 474 sub blocksort() { OPf_SPECIAL|OPf_STACKED }
475 if ($name eq 'sort' && ($op->flags & blocksort) == blocksort) {
1df34986 476 my $first = $op->first;
f66c782a 477 my $pushmark = $first->sibling;
478 my $rvgv = $pushmark->first;
479 my $leave = $rvgv->first;
480
481 my $leaveix = $leave->ix;
482
483 my $rvgvix = $rvgv->ix;
484 asm "ldop", $rvgvix unless $rvgvix == $opix;
485 asm "op_first", $leaveix;
486
487 my $pushmarkix = $pushmark->ix;
488 asm "ldop", $pushmarkix unless $pushmarkix == $opix;
489 asm "op_first", $rvgvix;
490
1df34986 491 my $firstix = $first->ix;
1df34986 492 asm "ldop", $firstix unless $firstix == $opix;
f66c782a 493 asm "op_sibling", $pushmarkix;
494
1df34986 495 $op->B::OP::bsave($ix);
496 asm "op_first", $firstix;
497 } elsif ($name eq 'formline') {
498 $op->B::UNOP::bsave_fat($ix);
a798dbf2 499 } else {
1df34986 500 $op->B::OP::bsave($ix);
a798dbf2 501 }
a798dbf2 502}
503
1df34986 504# fat versions
a798dbf2 505
1df34986 506sub B::OP::bsave_fat {
507 my ($op, $ix) = @_;
508 my $siblix = $op->sibling->ix;
a798dbf2 509
1df34986 510 $op->B::OP::bsave_thin($ix);
511 asm "op_sibling", $siblix;
512 # asm "op_seq", -1; XXX don't allocate OPs piece by piece
a798dbf2 513}
514
1df34986 515sub B::UNOP::bsave_fat {
516 my ($op,$ix) = @_;
517 my $firstix = $op->first->ix;
a798dbf2 518
1df34986 519 $op->B::OP::bsave($ix);
520 asm "op_first", $firstix;
a798dbf2 521}
522
1df34986 523sub B::BINOP::bsave_fat {
524 my ($op,$ix) = @_;
525 my $last = $op->last;
526 my $lastix = $op->last->ix;
f66c782a 527 if (VERSION < 5.009 && $op->name eq 'aassign' && $last->name eq 'null') {
1df34986 528 asm "ldop", $lastix unless $lastix == $opix;
529 asm "op_targ", $last->targ;
a798dbf2 530 }
a798dbf2 531
1df34986 532 $op->B::UNOP::bsave($ix);
533 asm "op_last", $lastix;
a798dbf2 534}
535
1df34986 536sub B::LOGOP::bsave {
537 my ($op,$ix) = @_;
538 my $otherix = $op->other->ix;
a798dbf2 539
1df34986 540 $op->B::UNOP::bsave($ix);
541 asm "op_other", $otherix;
a798dbf2 542}
543
1df34986 544sub B::PMOP::bsave {
545 my ($op,$ix) = @_;
546 my ($rrop, $rrarg, $rstart);
059a8bb7 547
1df34986 548 # my $pmnextix = $op->pmnext->ix; # XXX
059a8bb7 549
f66c782a 550 if (ITHREADS) {
1df34986 551 if ($op->name eq 'subst') {
552 $rrop = "op_pmreplroot";
553 $rrarg = $op->pmreplroot->ix;
554 $rstart = $op->pmreplstart->ix;
555 } elsif ($op->name eq 'pushre') {
556 $rrop = "op_pmreplrootpo";
557 $rrarg = $op->pmreplroot;
a798dbf2 558 }
1df34986 559 $op->B::BINOP::bsave($ix);
560 asm "op_pmstashpv", pvix $op->pmstashpv;
561 } else {
562 $rrop = "op_pmreplrootgv";
563 $rrarg = $op->pmreplroot->ix;
564 $rstart = $op->pmreplstart->ix if $op->name eq 'subst';
565 my $stashix = $op->pmstash->ix;
566 $op->B::BINOP::bsave($ix);
567 asm "op_pmstash", $stashix;
a798dbf2 568 }
1df34986 569
570 asm $rrop, $rrarg if $rrop;
571 asm "op_pmreplstart", $rstart if $rstart;
572
573 asm "op_pmflags", $op->pmflags;
574 asm "op_pmpermflags", $op->pmpermflags;
575 asm "op_pmdynflags", $op->pmdynflags;
576 # asm "op_pmnext", $pmnextix; # XXX
577 asm "newpv", pvstring $op->precomp;
578 asm "pregcomp";
a798dbf2 579}
580
1df34986 581sub B::SVOP::bsave {
582 my ($op,$ix) = @_;
583 my $svix = $op->sv->ix;
584
585 $op->B::OP::bsave($ix);
586 asm "op_sv", $svix;
a798dbf2 587}
588
1df34986 589sub B::PADOP::bsave {
590 my ($op,$ix) = @_;
591
592 $op->B::OP::bsave($ix);
593 asm "op_padix", $op->padix;
a798dbf2 594}
595
1df34986 596sub B::PVOP::bsave {
597 my ($op,$ix) = @_;
598 $op->B::OP::bsave($ix);
599 return unless my $pv = $op->pv;
600
601 if ($op->name eq 'trans') {
602 asm "op_pv_tr", join ',', length($pv)/2, unpack("s*", $pv);
603 } else {
604 asm "newpv", pvstring $pv;
605 asm "op_pv";
a798dbf2 606 }
a798dbf2 607}
608
1df34986 609sub B::LOOP::bsave {
610 my ($op,$ix) = @_;
611 my $nextix = $op->nextop->ix;
612 my $lastix = $op->lastop->ix;
613 my $redoix = $op->redoop->ix;
614
615 $op->B::BINOP::bsave($ix);
616 asm "op_redoop", $redoix;
617 asm "op_nextop", $nextix;
618 asm "op_lastop", $lastix;
a798dbf2 619}
620
1df34986 621sub B::COP::bsave {
622 my ($cop,$ix) = @_;
623 my $warnix = $cop->warnings->ix;
624 my $ioix = $cop->io->ix;
f66c782a 625 if (ITHREADS) {
1df34986 626 $cop->B::OP::bsave($ix);
627 asm "cop_stashpv", pvix $cop->stashpv;
628 asm "cop_file", pvix $cop->file;
629 } else {
630 my $stashix = $cop->stash->ix;
631 my $fileix = $cop->filegv->ix(1);
632 $cop->B::OP::bsave($ix);
633 asm "cop_stash", $stashix;
634 asm "cop_filegv", $fileix;
a798dbf2 635 }
1df34986 636 asm "cop_label", pvix $cop->label if $cop->label; # XXX AD
637 asm "cop_seq", $cop->cop_seq;
638 asm "cop_arybase", $cop->arybase;
639 asm "cop_line", $cop->line;
640 asm "cop_warnings", $warnix;
641 asm "cop_io", $ioix;
a798dbf2 642}
643
1df34986 644sub B::OP::opwalk {
645 my $op = shift;
646 my $ix = $optab{$$op};
647 defined($ix) ? $ix : do {
648 my $ix;
649 my @oplist = $op->oplist;
650 push @cloop, undef;
651 $ix = $_->ix while $_ = pop @oplist;
652 while ($_ = pop @cloop) {
653 asm "ldop", $optab{$$_};
654 asm "op_next", $optab{${$_->next}};
a798dbf2 655 }
1df34986 656 $ix;
a798dbf2 657 }
658}
659
1df34986 660#################################################
661
662sub save_cq {
663 my $av;
664 if (($av=begin_av)->isa("B::AV")) {
665 if ($savebegins) {
666 for ($av->ARRAY) {
667 next unless $_->FILE eq $0;
668 asm "push_begin", $_->ix;
669 }
670 } else {
671 for ($av->ARRAY) {
672 next unless $_->FILE eq $0;
566ece03 673 # XXX BEGIN { goto A while 1; A: }
1df34986 674 for (my $op = $_->START; $$op; $op = $op->next) {
566ece03 675 next unless $op->name eq 'require' ||
676 # this kludge needed for tests
677 $op->name eq 'gv' && do {
678 my $gv = class($op) eq 'SVOP' ?
679 $op->gv :
680 (($_->PADLIST->ARRAY)[1]->ARRAY)[$op->padix];
681 $$gv && $gv->NAME =~ /use_ok|plan/
682 };
1df34986 683 asm "push_begin", $_->ix;
684 last;
059a8bb7 685 }
059a8bb7 686 }
687 }
a798dbf2 688 }
1df34986 689 if (($av=init_av)->isa("B::AV")) {
690 for ($av->ARRAY) {
691 next unless $_->FILE eq $0;
692 asm "push_init", $_->ix;
059a8bb7 693 }
694 }
1df34986 695 if (($av=end_av)->isa("B::AV")) {
696 for ($av->ARRAY) {
697 next unless $_->FILE eq $0;
698 asm "push_end", $_->ix;
059a8bb7 699 }
a798dbf2 700 }
701}
702
a798dbf2 703sub compile {
566ece03 704 my ($head, $scan, $T_inhinc, $keep_syn);
1df34986 705 my $cwd = '';
706 $files{$0} = 1;
707 sub keep_syn {
708 $keep_syn = 1;
709 *B::OP::bsave = *B::OP::bsave_fat;
710 *B::UNOP::bsave = *B::UNOP::bsave_fat;
711 *B::BINOP::bsave = *B::BINOP::bsave_fat;
712 *B::LISTOP::bsave = *B::LISTOP::bsave_fat;
713 }
714 sub bwarn { print STDERR "Bytecode.pm: @_\n" }
715
716 for (@_) {
717 if (/^-S/) {
718 *newasm = *endasm = sub { };
719 *asm = sub { print " @_\n" };
720 *nice = sub ($) { print "\n@_\n" };
721 } elsif (/^-H/) {
722 require ByteLoader;
723 $head = "#! $^X\nuse ByteLoader $ByteLoader::VERSION;\n";
724 } elsif (/^-k/) {
725 keep_syn;
726 } elsif (/^-o(.*)$/) {
566ece03 727 open STDOUT, ">$1" or die "open $1: $!";
1df34986 728 } elsif (/^-f(.*)$/) {
729 $files{$1} = 1;
566ece03 730 } elsif (/^-s(.*)$/) {
731 $scan = length($1) ? $1 : $0;
1df34986 732 } elsif (/^-b/) {
733 $savebegins = 1;
566ece03 734 # this is here for the testsuite
735 } elsif (/^-TI/) {
1df34986 736 $T_inhinc = 1;
566ece03 737 } elsif (/^-TF(.*)/) {
738 my $thatfile = $1;
739 *B::COP::file = sub { $thatfile };
a798dbf2 740 } else {
1df34986 741 bwarn "Ignoring '$_' option";
a798dbf2 742 }
1df34986 743 }
744 if ($scan) {
566ece03 745 my $f;
47682f07 746 if (open $f, $scan) {
747 while (<$f>) {
748 /^#\s*line\s+\d+\s+("?)(.*)\1/ and $files{$2} = 1;
749 /^#/ and next;
750 if (/\bgoto\b\s*[^&]/ && !$keep_syn) {
751 bwarn "keeping the syntax tree: \"goto\" op found";
752 keep_syn;
753 }
a798dbf2 754 }
47682f07 755 } else {
756 bwarn "cannot rescan '$scan'";
1df34986 757 }
566ece03 758 close $f;
1df34986 759 }
760 binmode STDOUT;
761 return sub {
762 print $head if $head;
763 newasm sub { print @_ };
764
765 defstash->bwalk;
766 asm "main_start", main_start->opwalk;
767 asm "main_root", main_root->ix;
768 asm "main_cv", main_cv->ix;
769 asm "curpad", (comppadlist->ARRAY)[1]->ix;
770
771 asm "signal", cstring "__WARN__" # XXX
772 if warnhook->ix;
773 asm "incav", inc_gv->AV->ix if $T_inhinc;
774 save_cq;
775 asm "incav", inc_gv->AV->ix if $T_inhinc;
776 asm "dowarn", dowarn;
777
778 {
779 no strict 'refs';
780 nice "<DATA>";
781 my $dh = *{defstash->NAME."::DATA"};
f66c782a 782 unless (eof $dh) {
783 local undef $/;
1df34986 784 asm "data", ord 'D';
f66c782a 785 print <$dh>;
a798dbf2 786 } else {
1df34986 787 asm "ret";
a798dbf2 788 }
a798dbf2 789 }
1df34986 790
791 endasm;
a798dbf2 792 }
793}
794
7951;
566ece03 796
797=head1 NAME
798
799B::Bytecode - Perl compiler's bytecode backend
800
801=head1 SYNOPSIS
802
803B<perl -MO=Bytecode>[B<,-H>][B<,-o>I<script.plc>] I<script.pl>
804
805=head1 DESCRIPTION
806
807Compiles a Perl script into a bytecode format that could be loaded
808later by the ByteLoader module and executed as a regular Perl script.
809
810=head1 EXAMPLE
811
812 $ perl -MO=Bytecode,-H,-ohi -e 'print "hi!\n"'
813 $ perl hi
814 hi!
815
816=head1 OPTIONS
817
818=over 4
819
820=item B<-b>
821
822Save all the BEGIN blocks. Normally only BEGIN blocks that C<require>
823other files (ex. C<use Foo;>) are saved.
824
825=item B<-H>
826
827prepend a C<use ByteLoader VERSION;> line to the produced bytecode.
828
829=item B<-k>
830
831keep the syntax tree - it is stripped by default.
832
833=item B<-o>I<outfile>
834
835put the bytecode in <outfile> instead of dumping it to STDOUT.
836
837=item B<-s>
838
839scan the script for C<# line ..> directives and for <goto LABEL>
840expressions. When gotos are found keep the syntax tree.
841
842=back
843
844=head1 KNOWN BUGS
845
846=over 4
847
848=item *
849
850C<BEGIN { goto A: while 1; A: }> won't even compile.
851
852=item *
853
854C<?...?> and C<reset> do not work as expected.
855
856=item *
857
858variables in C<(?{ ... })> constructs are not properly scoped.
859
860=item *
861
862scripts that use source filters will fail miserably.
863
864=back
865
866=head1 NOTICE
867
868There are also undocumented bugs and options.
869
870THIS CODE IS HIGHLY EXPERIMENTAL. USE AT YOUR OWN RISK.
871
872=head1 AUTHORS
873
874Originally written by Malcolm Beattie <mbeattie@sable.ox.ac.uk> and
875modified by Benjamin Stuhl <sho_pi@hotmail.com>.
876
877Rewritten by Enache Adrian <enache@rdslink.ro>, 2003 a.d.
878
879=cut
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