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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. | |
7 | ||
8 | package B::Bytecode; | |
9 | ||
10 | our $VERSION = '1.01_01'; | |
11 | ||
12 | use strict; | |
13 | use Config; | |
14 | use B qw(class main_cv main_root main_start cstring comppadlist | |
15 | defstash curstash begin_av init_av end_av inc_gv warnhook diehook | |
16 | dowarn SVt_PVGV SVt_PVHV OPf_SPECIAL OPf_STACKED OPf_MOD | |
17 | OPpLVAL_INTRO SVf_FAKE SVf_READONLY); | |
18 | use B::Asmdata qw(@specialsv_name); | |
19 | use B::Assembler qw(asm newasm endasm); | |
20 | ||
21 | ################################################# | |
22 | ||
23 | my ($varix, $opix, $savebegins, %walked, %files, @cloop); | |
24 | my %strtab = (0,0); | |
25 | my %svtab = (0,0); | |
26 | my %optab = (0,0); | |
27 | my %spectab = (0,0); | |
28 | my $tix = 1; | |
29 | sub asm; | |
30 | sub nice ($) { } | |
31 | ||
32 | BEGIN { | |
33 | my $ithreads = $Config{'useithreads'} eq 'define'; | |
34 | eval qq{ | |
35 | sub ITHREADS() { $ithreads } | |
36 | sub VERSION() { $] } | |
37 | }; die $@ if $@; | |
38 | } | |
39 | ||
40 | ################################################# | |
41 | ||
42 | sub pvstring { | |
43 | my $pv = shift; | |
44 | defined($pv) ? cstring ($pv."\0") : "\"\""; | |
45 | } | |
46 | ||
47 | sub 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++; | |
54 | } | |
55 | } | |
56 | ||
57 | sub B::OP::ix { | |
58 | my $op = shift; | |
59 | my $ix = $optab{$$op}; | |
60 | defined($ix) ? $ix : do { | |
61 | nice "[".$op->name." $tix]"; | |
62 | asm "newopx", $op->size | $op->type <<7; | |
63 | $optab{$$op} = $opix = $ix = $tix++; | |
64 | $op->bsave($ix); | |
65 | $ix; | |
66 | } | |
67 | } | |
68 | ||
69 | sub B::SPECIAL::ix { | |
70 | my $spec = shift; | |
71 | my $ix = $spectab{$$spec}; | |
72 | defined($ix) ? $ix : do { | |
73 | nice '['.$specialsv_name[$$spec].']'; | |
74 | asm "ldspecsvx", $$spec; | |
75 | $spectab{$$spec} = $varix = $tix++; | |
76 | } | |
77 | } | |
78 | ||
79 | sub B::SV::ix { | |
80 | my $sv = shift; | |
81 | my $ix = $svtab{$$sv}; | |
82 | defined($ix) ? $ix : do { | |
83 | nice '['.class($sv).']'; | |
84 | asm "newsvx", $sv->FLAGS; | |
85 | $svtab{$$sv} = $varix = $ix = $tix++; | |
86 | $sv->bsave($ix); | |
87 | $ix; | |
88 | } | |
89 | } | |
90 | ||
91 | sub B::GV::ix { | |
92 | my ($gv,$desired) = @_; | |
93 | my $ix = $svtab{$$gv}; | |
94 | defined($ix) ? $ix : do { | |
95 | if ($gv->GP) { | |
96 | my ($svix, $avix, $hvix, $cvix, $ioix, $formix); | |
97 | nice "[GV]"; | |
98 | my $name = $gv->STASH->NAME . "::" . $gv->NAME; | |
99 | asm "gv_fetchpvx", cstring $name; | |
100 | $svtab{$$gv} = $varix = $ix = $tix++; | |
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 | ||
113 | # XXX {{{{ | |
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 | ||
119 | $ioix = $name !~ /STDOUT$/ ? $gv->IO->ix : 0; | |
120 | # }}}} XXX | |
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]"; | |
136 | asm "newsvx", $gv->FLAGS; | |
137 | $svtab{$$gv} = $varix = $ix = $tix++; | |
138 | my $stashix = $gv->STASH->ix; | |
139 | $gv->B::PVMG::bsave($ix); | |
140 | asm "xgv_flags", $gv->GvFLAGS; | |
141 | asm "xgv_stash", $stashix; | |
142 | } | |
143 | $ix; | |
144 | } | |
145 | } | |
146 | ||
147 | sub B::HV::ix { | |
148 | my $hv = shift; | |
149 | my $ix = $svtab{$$hv}; | |
150 | defined($ix) ? $ix : do { | |
151 | my ($ix,$i,@array); | |
152 | my $name = $hv->NAME; | |
153 | if ($name) { | |
154 | nice "[STASH]"; | |
155 | asm "gv_stashpvx", cstring $name; | |
156 | asm "sv_flags", $hv->FLAGS; | |
157 | $svtab{$$hv} = $varix = $ix = $tix++; | |
158 | asm "xhv_name", pvix $name; | |
159 | # my $pmrootix = $hv->PMROOT->ix; # XXX | |
160 | asm "ldsv", $varix = $ix unless $ix == $varix; | |
161 | # asm "xhv_pmroot", $pmrootix; # XXX | |
162 | } else { | |
163 | nice "[HV]"; | |
164 | asm "newsvx", $hv->FLAGS; | |
165 | $svtab{$$hv} = $varix = $ix = $tix++; | |
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; | |
175 | if (VERSION < 5.009) { | |
176 | asm "xnv", $hv->NVX; | |
177 | } | |
178 | asm "xmg_stash", $stashix; | |
179 | asm "xhv_riter", $hv->RITER; | |
180 | } | |
181 | asm "sv_refcnt", $hv->REFCNT; | |
182 | $ix; | |
183 | } | |
184 | } | |
185 | ||
186 | sub B::NULL::ix { | |
187 | my $sv = shift; | |
188 | $$sv ? $sv->B::SV::ix : 0; | |
189 | } | |
190 | ||
191 | sub B::NULL::opwalk { 0 } | |
192 | ||
193 | ################################################# | |
194 | ||
195 | sub B::NULL::bsave { | |
196 | my ($sv,$ix) = @_; | |
197 | ||
198 | nice '-'.class($sv).'-', | |
199 | asm "ldsv", $varix = $ix unless $ix == $varix; | |
200 | asm "sv_refcnt", $sv->REFCNT; | |
201 | } | |
202 | ||
203 | sub B::SV::bsave; | |
204 | *B::SV::bsave = *B::NULL::bsave; | |
205 | ||
206 | sub B::RV::bsave { | |
207 | my ($sv,$ix) = @_; | |
208 | my $rvix = $sv->RV->ix; | |
209 | $sv->B::NULL::bsave($ix); | |
210 | asm "xrv", $rvix; | |
211 | } | |
212 | ||
213 | sub B::PV::bsave { | |
214 | my ($sv,$ix) = @_; | |
215 | $sv->B::NULL::bsave($ix); | |
216 | asm "newpv", pvstring $sv->PVBM; | |
217 | asm "xpv"; | |
218 | } | |
219 | ||
220 | sub B::IV::bsave { | |
221 | my ($sv,$ix) = @_; | |
222 | $sv->B::NULL::bsave($ix); | |
223 | asm "xiv", $sv->IVX; | |
224 | } | |
225 | ||
226 | sub B::NV::bsave { | |
227 | my ($sv,$ix) = @_; | |
228 | $sv->B::NULL::bsave($ix); | |
229 | asm "xnv", sprintf "%.40g", $sv->NVX; | |
230 | } | |
231 | ||
232 | sub B::PVIV::bsave { | |
233 | my ($sv,$ix) = @_; | |
234 | $sv->POK ? | |
235 | $sv->B::PV::bsave($ix): | |
236 | $sv->ROK ? | |
237 | $sv->B::RV::bsave($ix): | |
238 | $sv->B::NULL::bsave($ix); | |
239 | if (VERSION >= 5.009) { | |
240 | # See note below in B::PVNV::bsave | |
241 | return if $sv->isa('B::AV'); | |
242 | return if $sv->isa('B::HV'); | |
243 | } | |
244 | asm "xiv", !ITHREADS && $sv->FLAGS & (SVf_FAKE|SVf_READONLY) ? | |
245 | "0 but true" : $sv->IVX; | |
246 | } | |
247 | ||
248 | sub B::PVNV::bsave { | |
249 | my ($sv,$ix) = @_; | |
250 | $sv->B::PVIV::bsave($ix); | |
251 | if (VERSION >= 5.009) { | |
252 | # Magical AVs end up here, but AVs now don't have an NV slot actually | |
253 | # allocated. Hence don't write out assembly to store the NV slot if | |
254 | # we're actually an array. | |
255 | return if $sv->isa('B::AV'); | |
256 | # Likewise HVs have no NV slot actually allocated. | |
257 | # I don't think that they can get here, but better safe than sorry | |
258 | return if $sv->isa('B::HV'); | |
259 | } | |
260 | asm "xnv", sprintf "%.40g", $sv->NVX; | |
261 | } | |
262 | ||
263 | sub B::PVMG::domagic { | |
264 | my ($sv,$ix) = @_; | |
265 | nice '-MAGICAL-'; | |
266 | my @mglist = $sv->MAGIC; | |
267 | my (@mgix, @namix); | |
268 | for (@mglist) { | |
269 | push @mgix, $_->OBJ->ix; | |
270 | push @namix, $_->PTR->ix if $_->LENGTH == B::HEf_SVKEY; | |
271 | } | |
272 | ||
273 | nice '-'.class($sv).'-', | |
274 | asm "ldsv", $varix = $ix unless $ix == $varix; | |
275 | for (@mglist) { | |
276 | asm "sv_magic", cstring $_->TYPE; | |
277 | asm "mg_obj", shift @mgix; | |
278 | my $length = $_->LENGTH; | |
279 | if ($length == B::HEf_SVKEY) { | |
280 | asm "mg_namex", shift @namix; | |
281 | } elsif ($length) { | |
282 | asm "newpv", pvstring $_->PTR; | |
283 | asm "mg_name"; | |
284 | } | |
285 | } | |
286 | } | |
287 | ||
288 | sub B::PVMG::bsave { | |
289 | my ($sv,$ix) = @_; | |
290 | my $stashix = $sv->SvSTASH->ix; | |
291 | $sv->B::PVNV::bsave($ix); | |
292 | asm "xmg_stash", $stashix; | |
293 | $sv->domagic($ix) if $sv->MAGICAL; | |
294 | } | |
295 | ||
296 | sub B::PVLV::bsave { | |
297 | my ($sv,$ix) = @_; | |
298 | my $targix = $sv->TARG->ix; | |
299 | $sv->B::PVMG::bsave($ix); | |
300 | asm "xlv_targ", $targix; | |
301 | asm "xlv_targoff", $sv->TARGOFF; | |
302 | asm "xlv_targlen", $sv->TARGLEN; | |
303 | asm "xlv_type", $sv->TYPE; | |
304 | ||
305 | } | |
306 | ||
307 | sub B::BM::bsave { | |
308 | my ($sv,$ix) = @_; | |
309 | $sv->B::PVMG::bsave($ix); | |
310 | asm "xpv_cur", $sv->CUR; | |
311 | asm "xbm_useful", $sv->USEFUL; | |
312 | asm "xbm_previous", $sv->PREVIOUS; | |
313 | asm "xbm_rare", $sv->RARE; | |
314 | } | |
315 | ||
316 | sub B::IO::bsave { | |
317 | my ($io,$ix) = @_; | |
318 | my $topix = $io->TOP_GV->ix; | |
319 | my $fmtix = $io->FMT_GV->ix; | |
320 | my $bottomix = $io->BOTTOM_GV->ix; | |
321 | $io->B::PVMG::bsave($ix); | |
322 | asm "xio_lines", $io->LINES; | |
323 | asm "xio_page", $io->PAGE; | |
324 | asm "xio_page_len", $io->PAGE_LEN; | |
325 | asm "xio_lines_left", $io->LINES_LEFT; | |
326 | asm "xio_top_name", pvix $io->TOP_NAME; | |
327 | asm "xio_top_gv", $topix; | |
328 | asm "xio_fmt_name", pvix $io->FMT_NAME; | |
329 | asm "xio_fmt_gv", $fmtix; | |
330 | asm "xio_bottom_name", pvix $io->BOTTOM_NAME; | |
331 | asm "xio_bottom_gv", $bottomix; | |
332 | asm "xio_subprocess", $io->SUBPROCESS; | |
333 | asm "xio_type", ord $io->IoTYPE; | |
334 | # asm "xio_flags", ord($io->IoFLAGS) & ~32; # XXX XXX | |
335 | } | |
336 | ||
337 | sub B::CV::bsave { | |
338 | my ($cv,$ix) = @_; | |
339 | my $stashix = $cv->STASH->ix; | |
340 | my $gvix = $cv->GV->ix; | |
341 | my $padlistix = $cv->PADLIST->ix; | |
342 | my $outsideix = $cv->OUTSIDE->ix; | |
343 | my $constix = $cv->CONST ? $cv->XSUBANY->ix : 0; | |
344 | my $startix = $cv->START->opwalk; | |
345 | my $rootix = $cv->ROOT->ix; | |
346 | ||
347 | $cv->B::PVMG::bsave($ix); | |
348 | asm "xcv_stash", $stashix; | |
349 | asm "xcv_start", $startix; | |
350 | asm "xcv_root", $rootix; | |
351 | asm "xcv_xsubany", $constix; | |
352 | asm "xcv_gv", $gvix; | |
353 | asm "xcv_file", pvix $cv->FILE if $cv->FILE; # XXX AD | |
354 | asm "xcv_padlist", $padlistix; | |
355 | asm "xcv_outside", $outsideix; | |
356 | asm "xcv_flags", $cv->CvFLAGS; | |
357 | asm "xcv_outside_seq", $cv->OUTSIDE_SEQ; | |
358 | asm "xcv_depth", $cv->DEPTH; | |
359 | } | |
360 | ||
361 | sub B::FM::bsave { | |
362 | my ($form,$ix) = @_; | |
363 | ||
364 | $form->B::CV::bsave($ix); | |
365 | asm "xfm_lines", $form->LINES; | |
366 | } | |
367 | ||
368 | sub B::AV::bsave { | |
369 | my ($av,$ix) = @_; | |
370 | return $av->B::PVMG::bsave($ix) if $av->MAGICAL; | |
371 | my @array = $av->ARRAY; | |
372 | $_ = $_->ix for @array; | |
373 | my $stashix = $av->SvSTASH->ix; | |
374 | ||
375 | nice "-AV-", | |
376 | asm "ldsv", $varix = $ix unless $ix == $varix; | |
377 | asm "av_extend", $av->MAX if $av->MAX >= 0; | |
378 | asm "av_pushx", $_ for @array; | |
379 | asm "sv_refcnt", $av->REFCNT; | |
380 | if (VERSION < 5.009) { | |
381 | asm "xav_flags", $av->AvFLAGS; | |
382 | } | |
383 | asm "xmg_stash", $stashix; | |
384 | } | |
385 | ||
386 | sub B::GV::desired { | |
387 | my $gv = shift; | |
388 | my ($cv, $form); | |
389 | $files{$gv->FILE} && $gv->LINE | |
390 | || ${$cv = $gv->CV} && $files{$cv->FILE} | |
391 | || ${$form = $gv->FORM} && $files{$form->FILE} | |
392 | } | |
393 | ||
394 | sub B::HV::bwalk { | |
395 | my $hv = shift; | |
396 | return if $walked{$$hv}++; | |
397 | my %stash = $hv->ARRAY; | |
398 | while (my($k,$v) = each %stash) { | |
399 | if ($v->SvTYPE == SVt_PVGV) { | |
400 | my $hash = $v->HV; | |
401 | if ($$hash && $hash->NAME) { | |
402 | $hash->bwalk; | |
403 | } | |
404 | $v->ix(1) if desired $v; | |
405 | } else { | |
406 | nice "[prototype]"; | |
407 | asm "gv_fetchpvx", cstring $hv->NAME . "::$k"; | |
408 | $svtab{$$v} = $varix = $tix; | |
409 | $v->bsave($tix++); | |
410 | asm "sv_flags", $v->FLAGS; | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | ###################################################### | |
416 | ||
417 | ||
418 | sub B::OP::bsave_thin { | |
419 | my ($op, $ix) = @_; | |
420 | my $next = $op->next; | |
421 | my $nextix = $optab{$$next}; | |
422 | $nextix = 0, push @cloop, $op unless defined $nextix; | |
423 | if ($ix != $opix) { | |
424 | nice '-'.$op->name.'-', | |
425 | asm "ldop", $opix = $ix; | |
426 | } | |
427 | asm "op_next", $nextix; | |
428 | asm "op_targ", $op->targ if $op->type; # tricky | |
429 | asm "op_flags", $op->flags; | |
430 | asm "op_private", $op->private; | |
431 | } | |
432 | ||
433 | sub B::OP::bsave; | |
434 | *B::OP::bsave = *B::OP::bsave_thin; | |
435 | ||
436 | sub B::UNOP::bsave { | |
437 | my ($op, $ix) = @_; | |
438 | my $name = $op->name; | |
439 | my $flags = $op->flags; | |
440 | my $first = $op->first; | |
441 | my $firstix = | |
442 | $name =~ /fl[io]p/ | |
443 | # that's just neat | |
444 | || (!ITHREADS && $name eq 'regcomp') | |
445 | # trick for /$a/o in pp_regcomp | |
446 | || $name eq 'rv2sv' | |
447 | && $op->flags & OPf_MOD | |
448 | && $op->private & OPpLVAL_INTRO | |
449 | # change #18774 made my life hard | |
450 | ? $first->ix | |
451 | : 0; | |
452 | ||
453 | $op->B::OP::bsave($ix); | |
454 | asm "op_first", $firstix; | |
455 | } | |
456 | ||
457 | sub B::BINOP::bsave { | |
458 | my ($op, $ix) = @_; | |
459 | if ($op->name eq 'aassign' && $op->private & B::OPpASSIGN_HASH()) { | |
460 | my $last = $op->last; | |
461 | my $lastix = do { | |
462 | local *B::OP::bsave = *B::OP::bsave_fat; | |
463 | local *B::UNOP::bsave = *B::UNOP::bsave_fat; | |
464 | $last->ix; | |
465 | }; | |
466 | asm "ldop", $lastix unless $lastix == $opix; | |
467 | asm "op_targ", $last->targ; | |
468 | $op->B::OP::bsave($ix); | |
469 | asm "op_last", $lastix; | |
470 | } else { | |
471 | $op->B::OP::bsave($ix); | |
472 | } | |
473 | } | |
474 | ||
475 | # not needed if no pseudohashes | |
476 | ||
477 | *B::BINOP::bsave = *B::OP::bsave if VERSION >= 5.009; | |
478 | ||
479 | # deal with sort / formline | |
480 | ||
481 | sub B::LISTOP::bsave { | |
482 | my ($op, $ix) = @_; | |
483 | my $name = $op->name; | |
484 | sub blocksort() { OPf_SPECIAL|OPf_STACKED } | |
485 | if ($name eq 'sort' && ($op->flags & blocksort) == blocksort) { | |
486 | my $first = $op->first; | |
487 | my $pushmark = $first->sibling; | |
488 | my $rvgv = $pushmark->first; | |
489 | my $leave = $rvgv->first; | |
490 | ||
491 | my $leaveix = $leave->ix; | |
492 | ||
493 | my $rvgvix = $rvgv->ix; | |
494 | asm "ldop", $rvgvix unless $rvgvix == $opix; | |
495 | asm "op_first", $leaveix; | |
496 | ||
497 | my $pushmarkix = $pushmark->ix; | |
498 | asm "ldop", $pushmarkix unless $pushmarkix == $opix; | |
499 | asm "op_first", $rvgvix; | |
500 | ||
501 | my $firstix = $first->ix; | |
502 | asm "ldop", $firstix unless $firstix == $opix; | |
503 | asm "op_sibling", $pushmarkix; | |
504 | ||
505 | $op->B::OP::bsave($ix); | |
506 | asm "op_first", $firstix; | |
507 | } elsif ($name eq 'formline') { | |
508 | $op->B::UNOP::bsave_fat($ix); | |
509 | } else { | |
510 | $op->B::OP::bsave($ix); | |
511 | } | |
512 | } | |
513 | ||
514 | # fat versions | |
515 | ||
516 | sub B::OP::bsave_fat { | |
517 | my ($op, $ix) = @_; | |
518 | my $siblix = $op->sibling->ix; | |
519 | ||
520 | $op->B::OP::bsave_thin($ix); | |
521 | asm "op_sibling", $siblix; | |
522 | # asm "op_seq", -1; XXX don't allocate OPs piece by piece | |
523 | } | |
524 | ||
525 | sub B::UNOP::bsave_fat { | |
526 | my ($op,$ix) = @_; | |
527 | my $firstix = $op->first->ix; | |
528 | ||
529 | $op->B::OP::bsave($ix); | |
530 | asm "op_first", $firstix; | |
531 | } | |
532 | ||
533 | sub B::BINOP::bsave_fat { | |
534 | my ($op,$ix) = @_; | |
535 | my $last = $op->last; | |
536 | my $lastix = $op->last->ix; | |
537 | if (VERSION < 5.009 && $op->name eq 'aassign' && $last->name eq 'null') { | |
538 | asm "ldop", $lastix unless $lastix == $opix; | |
539 | asm "op_targ", $last->targ; | |
540 | } | |
541 | ||
542 | $op->B::UNOP::bsave($ix); | |
543 | asm "op_last", $lastix; | |
544 | } | |
545 | ||
546 | sub B::LOGOP::bsave { | |
547 | my ($op,$ix) = @_; | |
548 | my $otherix = $op->other->ix; | |
549 | ||
550 | $op->B::UNOP::bsave($ix); | |
551 | asm "op_other", $otherix; | |
552 | } | |
553 | ||
554 | sub B::PMOP::bsave { | |
555 | my ($op,$ix) = @_; | |
556 | my ($rrop, $rrarg, $rstart); | |
557 | ||
558 | # my $pmnextix = $op->pmnext->ix; # XXX | |
559 | ||
560 | if (ITHREADS) { | |
561 | if ($op->name eq 'subst') { | |
562 | $rrop = "op_pmreplroot"; | |
563 | $rrarg = $op->pmreplroot->ix; | |
564 | $rstart = $op->pmreplstart->ix; | |
565 | } elsif ($op->name eq 'pushre') { | |
566 | $rrop = "op_pmreplrootpo"; | |
567 | $rrarg = $op->pmreplroot; | |
568 | } | |
569 | $op->B::BINOP::bsave($ix); | |
570 | asm "op_pmstashpv", pvix $op->pmstashpv; | |
571 | } else { | |
572 | $rrop = "op_pmreplrootgv"; | |
573 | $rrarg = $op->pmreplroot->ix; | |
574 | $rstart = $op->pmreplstart->ix if $op->name eq 'subst'; | |
575 | my $stashix = $op->pmstash->ix; | |
576 | $op->B::BINOP::bsave($ix); | |
577 | asm "op_pmstash", $stashix; | |
578 | } | |
579 | ||
580 | asm $rrop, $rrarg if $rrop; | |
581 | asm "op_pmreplstart", $rstart if $rstart; | |
582 | ||
583 | asm "op_pmflags", $op->pmflags; | |
584 | asm "op_pmpermflags", $op->pmpermflags; | |
585 | asm "op_pmdynflags", $op->pmdynflags; | |
586 | # asm "op_pmnext", $pmnextix; # XXX | |
587 | asm "newpv", pvstring $op->precomp; | |
588 | asm "pregcomp"; | |
589 | } | |
590 | ||
591 | sub B::SVOP::bsave { | |
592 | my ($op,$ix) = @_; | |
593 | my $svix = $op->sv->ix; | |
594 | ||
595 | $op->B::OP::bsave($ix); | |
596 | asm "op_sv", $svix; | |
597 | } | |
598 | ||
599 | sub B::PADOP::bsave { | |
600 | my ($op,$ix) = @_; | |
601 | ||
602 | $op->B::OP::bsave($ix); | |
603 | asm "op_padix", $op->padix; | |
604 | } | |
605 | ||
606 | sub B::PVOP::bsave { | |
607 | my ($op,$ix) = @_; | |
608 | $op->B::OP::bsave($ix); | |
609 | return unless my $pv = $op->pv; | |
610 | ||
611 | if ($op->name eq 'trans') { | |
612 | asm "op_pv_tr", join ',', length($pv)/2, unpack("s*", $pv); | |
613 | } else { | |
614 | asm "newpv", pvstring $pv; | |
615 | asm "op_pv"; | |
616 | } | |
617 | } | |
618 | ||
619 | sub B::LOOP::bsave { | |
620 | my ($op,$ix) = @_; | |
621 | my $nextix = $op->nextop->ix; | |
622 | my $lastix = $op->lastop->ix; | |
623 | my $redoix = $op->redoop->ix; | |
624 | ||
625 | $op->B::BINOP::bsave($ix); | |
626 | asm "op_redoop", $redoix; | |
627 | asm "op_nextop", $nextix; | |
628 | asm "op_lastop", $lastix; | |
629 | } | |
630 | ||
631 | sub B::COP::bsave { | |
632 | my ($cop,$ix) = @_; | |
633 | my $warnix = $cop->warnings->ix; | |
634 | my $ioix = $cop->io->ix; | |
635 | if (ITHREADS) { | |
636 | $cop->B::OP::bsave($ix); | |
637 | asm "cop_stashpv", pvix $cop->stashpv; | |
638 | asm "cop_file", pvix $cop->file; | |
639 | } else { | |
640 | my $stashix = $cop->stash->ix; | |
641 | my $fileix = $cop->filegv->ix(1); | |
642 | $cop->B::OP::bsave($ix); | |
643 | asm "cop_stash", $stashix; | |
644 | asm "cop_filegv", $fileix; | |
645 | } | |
646 | asm "cop_label", pvix $cop->label if $cop->label; # XXX AD | |
647 | asm "cop_seq", $cop->cop_seq; | |
648 | asm "cop_arybase", $cop->arybase; | |
649 | asm "cop_line", $cop->line; | |
650 | asm "cop_warnings", $warnix; | |
651 | asm "cop_io", $ioix; | |
652 | } | |
653 | ||
654 | sub B::OP::opwalk { | |
655 | my $op = shift; | |
656 | my $ix = $optab{$$op}; | |
657 | defined($ix) ? $ix : do { | |
658 | my $ix; | |
659 | my @oplist = $op->oplist; | |
660 | push @cloop, undef; | |
661 | $ix = $_->ix while $_ = pop @oplist; | |
662 | while ($_ = pop @cloop) { | |
663 | asm "ldop", $optab{$$_}; | |
664 | asm "op_next", $optab{${$_->next}}; | |
665 | } | |
666 | $ix; | |
667 | } | |
668 | } | |
669 | ||
670 | ################################################# | |
671 | ||
672 | sub save_cq { | |
673 | my $av; | |
674 | if (($av=begin_av)->isa("B::AV")) { | |
675 | if ($savebegins) { | |
676 | for ($av->ARRAY) { | |
677 | next unless $_->FILE eq $0; | |
678 | asm "push_begin", $_->ix; | |
679 | } | |
680 | } else { | |
681 | for ($av->ARRAY) { | |
682 | next unless $_->FILE eq $0; | |
683 | # XXX BEGIN { goto A while 1; A: } | |
684 | for (my $op = $_->START; $$op; $op = $op->next) { | |
685 | next unless $op->name eq 'require' || | |
686 | # this kludge needed for tests | |
687 | $op->name eq 'gv' && do { | |
688 | my $gv = class($op) eq 'SVOP' ? | |
689 | $op->gv : | |
690 | (($_->PADLIST->ARRAY)[1]->ARRAY)[$op->padix]; | |
691 | $$gv && $gv->NAME =~ /use_ok|plan/ | |
692 | }; | |
693 | asm "push_begin", $_->ix; | |
694 | last; | |
695 | } | |
696 | } | |
697 | } | |
698 | } | |
699 | if (($av=init_av)->isa("B::AV")) { | |
700 | for ($av->ARRAY) { | |
701 | next unless $_->FILE eq $0; | |
702 | asm "push_init", $_->ix; | |
703 | } | |
704 | } | |
705 | if (($av=end_av)->isa("B::AV")) { | |
706 | for ($av->ARRAY) { | |
707 | next unless $_->FILE eq $0; | |
708 | asm "push_end", $_->ix; | |
709 | } | |
710 | } | |
711 | } | |
712 | ||
713 | sub compile { | |
714 | my ($head, $scan, $T_inhinc, $keep_syn); | |
715 | my $cwd = ''; | |
716 | $files{$0} = 1; | |
717 | sub keep_syn { | |
718 | $keep_syn = 1; | |
719 | *B::OP::bsave = *B::OP::bsave_fat; | |
720 | *B::UNOP::bsave = *B::UNOP::bsave_fat; | |
721 | *B::BINOP::bsave = *B::BINOP::bsave_fat; | |
722 | *B::LISTOP::bsave = *B::LISTOP::bsave_fat; | |
723 | } | |
724 | sub bwarn { print STDERR "Bytecode.pm: @_\n" } | |
725 | ||
726 | for (@_) { | |
727 | if (/^-S/) { | |
728 | *newasm = *endasm = sub { }; | |
729 | *asm = sub { print " @_\n" }; | |
730 | *nice = sub ($) { print "\n@_\n" }; | |
731 | } elsif (/^-H/) { | |
732 | require ByteLoader; | |
733 | $head = "#! $^X\nuse ByteLoader $ByteLoader::VERSION;\n"; | |
734 | } elsif (/^-k/) { | |
735 | keep_syn; | |
736 | } elsif (/^-o(.*)$/) { | |
737 | open STDOUT, ">$1" or die "open $1: $!"; | |
738 | } elsif (/^-f(.*)$/) { | |
739 | $files{$1} = 1; | |
740 | } elsif (/^-s(.*)$/) { | |
741 | $scan = length($1) ? $1 : $0; | |
742 | } elsif (/^-b/) { | |
743 | $savebegins = 1; | |
744 | # this is here for the testsuite | |
745 | } elsif (/^-TI/) { | |
746 | $T_inhinc = 1; | |
747 | } elsif (/^-TF(.*)/) { | |
748 | my $thatfile = $1; | |
749 | *B::COP::file = sub { $thatfile }; | |
750 | } else { | |
751 | bwarn "Ignoring '$_' option"; | |
752 | } | |
753 | } | |
754 | if ($scan) { | |
755 | my $f; | |
756 | if (open $f, $scan) { | |
757 | while (<$f>) { | |
758 | /^#\s*line\s+\d+\s+("?)(.*)\1/ and $files{$2} = 1; | |
759 | /^#/ and next; | |
760 | if (/\bgoto\b\s*[^&]/ && !$keep_syn) { | |
761 | bwarn "keeping the syntax tree: \"goto\" op found"; | |
762 | keep_syn; | |
763 | } | |
764 | } | |
765 | } else { | |
766 | bwarn "cannot rescan '$scan'"; | |
767 | } | |
768 | close $f; | |
769 | } | |
770 | binmode STDOUT; | |
771 | return sub { | |
772 | print $head if $head; | |
773 | newasm sub { print @_ }; | |
774 | ||
775 | defstash->bwalk; | |
776 | asm "main_start", main_start->opwalk; | |
777 | asm "main_root", main_root->ix; | |
778 | asm "main_cv", main_cv->ix; | |
779 | asm "curpad", (comppadlist->ARRAY)[1]->ix; | |
780 | ||
781 | asm "signal", cstring "__WARN__" # XXX | |
782 | if warnhook->ix; | |
783 | asm "incav", inc_gv->AV->ix if $T_inhinc; | |
784 | save_cq; | |
785 | asm "incav", inc_gv->AV->ix if $T_inhinc; | |
786 | asm "dowarn", dowarn; | |
787 | ||
788 | { | |
789 | no strict 'refs'; | |
790 | nice "<DATA>"; | |
791 | my $dh = *{defstash->NAME."::DATA"}; | |
792 | unless (eof $dh) { | |
793 | local undef $/; | |
794 | asm "data", ord 'D'; | |
795 | print <$dh>; | |
796 | } else { | |
797 | asm "ret"; | |
798 | } | |
799 | } | |
800 | ||
801 | endasm; | |
802 | } | |
803 | } | |
804 | ||
805 | 1; | |
806 | ||
807 | =head1 NAME | |
808 | ||
809 | B::Bytecode - Perl compiler's bytecode backend | |
810 | ||
811 | =head1 SYNOPSIS | |
812 | ||
813 | B<perl -MO=Bytecode>[B<,-H>][B<,-o>I<script.plc>] I<script.pl> | |
814 | ||
815 | =head1 DESCRIPTION | |
816 | ||
817 | Compiles a Perl script into a bytecode format that could be loaded | |
818 | later by the ByteLoader module and executed as a regular Perl script. | |
819 | ||
820 | =head1 EXAMPLE | |
821 | ||
822 | $ perl -MO=Bytecode,-H,-ohi -e 'print "hi!\n"' | |
823 | $ perl hi | |
824 | hi! | |
825 | ||
826 | =head1 OPTIONS | |
827 | ||
828 | =over 4 | |
829 | ||
830 | =item B<-b> | |
831 | ||
832 | Save all the BEGIN blocks. Normally only BEGIN blocks that C<require> | |
833 | other files (ex. C<use Foo;>) are saved. | |
834 | ||
835 | =item B<-H> | |
836 | ||
837 | prepend a C<use ByteLoader VERSION;> line to the produced bytecode. | |
838 | ||
839 | =item B<-k> | |
840 | ||
841 | keep the syntax tree - it is stripped by default. | |
842 | ||
843 | =item B<-o>I<outfile> | |
844 | ||
845 | put the bytecode in <outfile> instead of dumping it to STDOUT. | |
846 | ||
847 | =item B<-s> | |
848 | ||
849 | scan the script for C<# line ..> directives and for <goto LABEL> | |
850 | expressions. When gotos are found keep the syntax tree. | |
851 | ||
852 | =back | |
853 | ||
854 | =head1 KNOWN BUGS | |
855 | ||
856 | =over 4 | |
857 | ||
858 | =item * | |
859 | ||
860 | C<BEGIN { goto A: while 1; A: }> won't even compile. | |
861 | ||
862 | =item * | |
863 | ||
864 | C<?...?> and C<reset> do not work as expected. | |
865 | ||
866 | =item * | |
867 | ||
868 | variables in C<(?{ ... })> constructs are not properly scoped. | |
869 | ||
870 | =item * | |
871 | ||
872 | scripts that use source filters will fail miserably. | |
873 | ||
874 | =back | |
875 | ||
876 | =head1 NOTICE | |
877 | ||
878 | There are also undocumented bugs and options. | |
879 | ||
880 | THIS CODE IS HIGHLY EXPERIMENTAL. USE AT YOUR OWN RISK. | |
881 | ||
882 | =head1 AUTHORS | |
883 | ||
884 | Originally written by Malcolm Beattie <mbeattie@sable.ox.ac.uk> and | |
885 | modified by Benjamin Stuhl <sho_pi@hotmail.com>. | |
886 | ||
887 | Rewritten by Enache Adrian <enache@rdslink.ro>, 2003 a.d. | |
888 | ||
889 | =cut |