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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. |
059a8bb7 |
7 | |
1df34986 |
8 | package B::Bytecode; |
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9 | |
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10 | our $VERSION = '1.02'; |
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11 | |
a798dbf2 |
12 | use strict; |
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13 | use Config; |
14 | use B qw(class main_cv main_root main_start cstring comppadlist |
15 | defstash curstash begin_av init_av end_av inc_gv warnhook diehook |
16 | dowarn SVt_PVGV SVt_PVHV OPf_SPECIAL OPf_STACKED OPf_MOD |
17 | OPpLVAL_INTRO SVf_FAKE SVf_READONLY); |
18 | use B::Asmdata qw(@specialsv_name); |
19 | use B::Assembler qw(asm newasm endasm); |
1df34986 |
20 | |
21 | ################################################# |
22 | |
f66c782a |
23 | my ($varix, $opix, $savebegins, %walked, %files, @cloop); |
1df34986 |
24 | my %strtab = (0,0); |
25 | my %svtab = (0,0); |
26 | my %optab = (0,0); |
27 | my %spectab = (0,0); |
1df34986 |
28 | my $tix = 1; |
29 | sub asm; |
30 | sub nice ($) { } |
f66c782a |
31 | |
32 | BEGIN { |
33 | my $ithreads = $Config{'useithreads'} eq 'define'; |
34 | eval qq{ |
35 | sub ITHREADS() { $ithreads } |
36 | sub VERSION() { $] } |
37 | }; die $@ if $@; |
38 | } |
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39 | |
40 | ################################################# |
059a8bb7 |
41 | |
1df34986 |
42 | sub pvstring { |
43 | my $pv = shift; |
44 | defined($pv) ? cstring ($pv."\0") : "\"\""; |
059a8bb7 |
45 | } |
a798dbf2 |
46 | |
1df34986 |
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++; |
a798dbf2 |
54 | } |
55 | } |
56 | |
1df34986 |
57 | sub 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 |
69 | sub 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 |
79 | sub 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 | $ix; |
88 | } |
89 | } |
90 | |
91 | sub B::GV::ix { |
92 | my ($gv,$desired) = @_; |
93 | my $ix = $svtab{$$gv}; |
94 | defined($ix) ? $ix : do { |
95 | if ($gv->GP) { |
96 | my ($svix, $avix, $hvix, $cvix, $ioix, $formix); |
97 | nice "[GV]"; |
98 | my $name = $gv->STASH->NAME . "::" . $gv->NAME; |
566ece03 |
99 | asm "gv_fetchpvx", cstring $name; |
100 | $svtab{$$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{$$gv} = $varix = $ix = $tix++; |
1df34986 |
138 | my $stashix = $gv->STASH->ix; |
139 | $gv->B::PVMG::bsave($ix); |
140 | asm "xgv_flags", $gv->GvFLAGS; |
141 | asm "xgv_stash", $stashix; |
142 | } |
143 | $ix; |
144 | } |
a798dbf2 |
145 | } |
146 | |
1df34986 |
147 | sub B::HV::ix { |
148 | my $hv = shift; |
149 | my $ix = $svtab{$$hv}; |
150 | defined($ix) ? $ix : do { |
151 | my ($ix,$i,@array); |
152 | my $name = $hv->NAME; |
153 | if ($name) { |
154 | nice "[STASH]"; |
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; |
0aada121 |
175 | if (VERSION < 5.009) { |
e1f6360a |
176 | asm "xnv", $hv->NVX; |
177 | } |
1df34986 |
178 | asm "xmg_stash", $stashix; |
6a1bf161 |
179 | asm "xhv_riter", $hv->RITER; |
1df34986 |
180 | } |
181 | asm "sv_refcnt", $hv->REFCNT; |
1df34986 |
182 | $ix; |
a798dbf2 |
183 | } |
184 | } |
185 | |
1df34986 |
186 | sub B::NULL::ix { |
187 | my $sv = shift; |
188 | $$sv ? $sv->B::SV::ix : 0; |
059a8bb7 |
189 | } |
190 | |
1df34986 |
191 | sub B::NULL::opwalk { 0 } |
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192 | |
1df34986 |
193 | ################################################# |
a798dbf2 |
194 | |
1df34986 |
195 | sub B::NULL::bsave { |
196 | my ($sv,$ix) = @_; |
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197 | |
1df34986 |
198 | nice '-'.class($sv).'-', |
199 | asm "ldsv", $varix = $ix unless $ix == $varix; |
200 | asm "sv_refcnt", $sv->REFCNT; |
a798dbf2 |
201 | } |
202 | |
1df34986 |
203 | sub B::SV::bsave; |
204 | *B::SV::bsave = *B::NULL::bsave; |
a798dbf2 |
205 | |
1df34986 |
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; |
a798dbf2 |
211 | } |
212 | |
1df34986 |
213 | sub B::PV::bsave { |
214 | my ($sv,$ix) = @_; |
215 | $sv->B::NULL::bsave($ix); |
216 | asm "newpv", pvstring $sv->PVBM; |
217 | asm "xpv"; |
a798dbf2 |
218 | } |
219 | |
1df34986 |
220 | sub B::IV::bsave { |
221 | my ($sv,$ix) = @_; |
222 | $sv->B::NULL::bsave($ix); |
223 | asm "xiv", $sv->IVX; |
a798dbf2 |
224 | } |
225 | |
1df34986 |
226 | sub B::NV::bsave { |
227 | my ($sv,$ix) = @_; |
228 | $sv->B::NULL::bsave($ix); |
229 | asm "xnv", sprintf "%.40g", $sv->NVX; |
a798dbf2 |
230 | } |
231 | |
1df34986 |
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); |
e1f6360a |
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'); |
bb172083 |
243 | return if $sv->isa('B::CV'); |
e1f6360a |
244 | } |
f66c782a |
245 | asm "xiv", !ITHREADS && $sv->FLAGS & (SVf_FAKE|SVf_READONLY) ? |
1df34986 |
246 | "0 but true" : $sv->IVX; |
a798dbf2 |
247 | } |
248 | |
1df34986 |
249 | sub B::PVNV::bsave { |
250 | my ($sv,$ix) = @_; |
251 | $sv->B::PVIV::bsave($ix); |
e1f6360a |
252 | if (VERSION >= 5.009) { |
253 | # Magical AVs end up here, but AVs now don't have an NV slot actually |
254 | # allocated. Hence don't write out assembly to store the NV slot if |
255 | # we're actually an array. |
256 | return if $sv->isa('B::AV'); |
257 | # Likewise HVs have no NV slot actually allocated. |
258 | # I don't think that they can get here, but better safe than sorry |
259 | return if $sv->isa('B::HV'); |
c84c4652 |
260 | return if $sv->isa('B::CV'); |
261 | return if $sv->isa('B::FM'); |
262 | } |
1df34986 |
263 | asm "xnv", sprintf "%.40g", $sv->NVX; |
a798dbf2 |
264 | } |
265 | |
1df34986 |
266 | sub B::PVMG::domagic { |
267 | my ($sv,$ix) = @_; |
268 | nice '-MAGICAL-'; |
269 | my @mglist = $sv->MAGIC; |
270 | my (@mgix, @namix); |
271 | for (@mglist) { |
272 | push @mgix, $_->OBJ->ix; |
273 | push @namix, $_->PTR->ix if $_->LENGTH == B::HEf_SVKEY; |
a798dbf2 |
274 | } |
a798dbf2 |
275 | |
1df34986 |
276 | nice '-'.class($sv).'-', |
277 | asm "ldsv", $varix = $ix unless $ix == $varix; |
278 | for (@mglist) { |
279 | asm "sv_magic", cstring $_->TYPE; |
280 | asm "mg_obj", shift @mgix; |
281 | my $length = $_->LENGTH; |
282 | if ($length == B::HEf_SVKEY) { |
283 | asm "mg_namex", shift @namix; |
284 | } elsif ($length) { |
285 | asm "newpv", pvstring $_->PTR; |
286 | asm "mg_name"; |
287 | } |
a798dbf2 |
288 | } |
289 | } |
290 | |
1df34986 |
291 | sub B::PVMG::bsave { |
292 | my ($sv,$ix) = @_; |
293 | my $stashix = $sv->SvSTASH->ix; |
294 | $sv->B::PVNV::bsave($ix); |
295 | asm "xmg_stash", $stashix; |
296 | $sv->domagic($ix) if $sv->MAGICAL; |
297 | } |
298 | |
299 | sub B::PVLV::bsave { |
300 | my ($sv,$ix) = @_; |
301 | my $targix = $sv->TARG->ix; |
302 | $sv->B::PVMG::bsave($ix); |
303 | asm "xlv_targ", $targix; |
304 | asm "xlv_targoff", $sv->TARGOFF; |
305 | asm "xlv_targlen", $sv->TARGLEN; |
306 | asm "xlv_type", $sv->TYPE; |
307 | |
308 | } |
309 | |
310 | sub B::BM::bsave { |
311 | my ($sv,$ix) = @_; |
312 | $sv->B::PVMG::bsave($ix); |
313 | asm "xpv_cur", $sv->CUR; |
314 | asm "xbm_useful", $sv->USEFUL; |
315 | asm "xbm_previous", $sv->PREVIOUS; |
316 | asm "xbm_rare", $sv->RARE; |
317 | } |
318 | |
319 | sub B::IO::bsave { |
320 | my ($io,$ix) = @_; |
321 | my $topix = $io->TOP_GV->ix; |
322 | my $fmtix = $io->FMT_GV->ix; |
323 | my $bottomix = $io->BOTTOM_GV->ix; |
324 | $io->B::PVMG::bsave($ix); |
325 | asm "xio_lines", $io->LINES; |
326 | asm "xio_page", $io->PAGE; |
327 | asm "xio_page_len", $io->PAGE_LEN; |
328 | asm "xio_lines_left", $io->LINES_LEFT; |
329 | asm "xio_top_name", pvix $io->TOP_NAME; |
330 | asm "xio_top_gv", $topix; |
331 | asm "xio_fmt_name", pvix $io->FMT_NAME; |
332 | asm "xio_fmt_gv", $fmtix; |
333 | asm "xio_bottom_name", pvix $io->BOTTOM_NAME; |
334 | asm "xio_bottom_gv", $bottomix; |
335 | asm "xio_subprocess", $io->SUBPROCESS; |
336 | asm "xio_type", ord $io->IoTYPE; |
337 | # asm "xio_flags", ord($io->IoFLAGS) & ~32; # XXX XXX |
338 | } |
339 | |
340 | sub B::CV::bsave { |
341 | my ($cv,$ix) = @_; |
342 | my $stashix = $cv->STASH->ix; |
1df34986 |
343 | my $gvix = $cv->GV->ix; |
344 | my $padlistix = $cv->PADLIST->ix; |
345 | my $outsideix = $cv->OUTSIDE->ix; |
346 | my $constix = $cv->CONST ? $cv->XSUBANY->ix : 0; |
566ece03 |
347 | my $startix = $cv->START->opwalk; |
348 | my $rootix = $cv->ROOT->ix; |
1df34986 |
349 | |
350 | $cv->B::PVMG::bsave($ix); |
351 | asm "xcv_stash", $stashix; |
352 | asm "xcv_start", $startix; |
353 | asm "xcv_root", $rootix; |
354 | asm "xcv_xsubany", $constix; |
355 | asm "xcv_gv", $gvix; |
356 | asm "xcv_file", pvix $cv->FILE if $cv->FILE; # XXX AD |
357 | asm "xcv_padlist", $padlistix; |
358 | asm "xcv_outside", $outsideix; |
359 | asm "xcv_flags", $cv->CvFLAGS; |
360 | asm "xcv_outside_seq", $cv->OUTSIDE_SEQ; |
361 | asm "xcv_depth", $cv->DEPTH; |
362 | } |
363 | |
364 | sub B::FM::bsave { |
365 | my ($form,$ix) = @_; |
366 | |
367 | $form->B::CV::bsave($ix); |
368 | asm "xfm_lines", $form->LINES; |
369 | } |
370 | |
371 | sub B::AV::bsave { |
372 | my ($av,$ix) = @_; |
373 | return $av->B::PVMG::bsave($ix) if $av->MAGICAL; |
374 | my @array = $av->ARRAY; |
375 | $_ = $_->ix for @array; |
376 | my $stashix = $av->SvSTASH->ix; |
377 | |
378 | nice "-AV-", |
379 | asm "ldsv", $varix = $ix unless $ix == $varix; |
ecd04c98 |
380 | asm "av_extend", $av->MAX if $av->MAX >= 0; |
1df34986 |
381 | asm "av_pushx", $_ for @array; |
382 | asm "sv_refcnt", $av->REFCNT; |
e1f6360a |
383 | if (VERSION < 5.009) { |
384 | asm "xav_flags", $av->AvFLAGS; |
385 | } |
1df34986 |
386 | asm "xmg_stash", $stashix; |
387 | } |
388 | |
389 | sub B::GV::desired { |
390 | my $gv = shift; |
391 | my ($cv, $form); |
392 | $files{$gv->FILE} && $gv->LINE |
393 | || ${$cv = $gv->CV} && $files{$cv->FILE} |
394 | || ${$form = $gv->FORM} && $files{$form->FILE} |
a798dbf2 |
395 | } |
396 | |
1df34986 |
397 | sub B::HV::bwalk { |
398 | my $hv = shift; |
399 | return if $walked{$$hv}++; |
400 | my %stash = $hv->ARRAY; |
401 | while (my($k,$v) = each %stash) { |
402 | if ($v->SvTYPE == SVt_PVGV) { |
403 | my $hash = $v->HV; |
404 | if ($$hash && $hash->NAME) { |
405 | $hash->bwalk; |
406 | } |
407 | $v->ix(1) if desired $v; |
408 | } else { |
409 | nice "[prototype]"; |
566ece03 |
410 | asm "gv_fetchpvx", cstring $hv->NAME . "::$k"; |
411 | $svtab{$$v} = $varix = $tix; |
1df34986 |
412 | $v->bsave($tix++); |
566ece03 |
413 | asm "sv_flags", $v->FLAGS; |
1df34986 |
414 | } |
415 | } |
a798dbf2 |
416 | } |
417 | |
1df34986 |
418 | ###################################################### |
a798dbf2 |
419 | |
a798dbf2 |
420 | |
1df34986 |
421 | sub B::OP::bsave_thin { |
422 | my ($op, $ix) = @_; |
423 | my $next = $op->next; |
424 | my $nextix = $optab{$$next}; |
425 | $nextix = 0, push @cloop, $op unless defined $nextix; |
426 | if ($ix != $opix) { |
427 | nice '-'.$op->name.'-', |
428 | asm "ldop", $opix = $ix; |
a798dbf2 |
429 | } |
1df34986 |
430 | asm "op_next", $nextix; |
431 | asm "op_targ", $op->targ if $op->type; # tricky |
432 | asm "op_flags", $op->flags; |
433 | asm "op_private", $op->private; |
a798dbf2 |
434 | } |
435 | |
1df34986 |
436 | sub B::OP::bsave; |
437 | *B::OP::bsave = *B::OP::bsave_thin; |
a798dbf2 |
438 | |
1df34986 |
439 | sub B::UNOP::bsave { |
440 | my ($op, $ix) = @_; |
441 | my $name = $op->name; |
442 | my $flags = $op->flags; |
443 | my $first = $op->first; |
444 | my $firstix = |
445 | $name =~ /fl[io]p/ |
446 | # that's just neat |
f66c782a |
447 | || (!ITHREADS && $name eq 'regcomp') |
1df34986 |
448 | # trick for /$a/o in pp_regcomp |
449 | || $name eq 'rv2sv' |
450 | && $op->flags & OPf_MOD |
451 | && $op->private & OPpLVAL_INTRO |
452 | # change #18774 made my life hard |
453 | ? $first->ix |
454 | : 0; |
455 | |
456 | $op->B::OP::bsave($ix); |
457 | asm "op_first", $firstix; |
458 | } |
459 | |
566ece03 |
460 | sub B::BINOP::bsave { |
461 | my ($op, $ix) = @_; |
462 | if ($op->name eq 'aassign' && $op->private & B::OPpASSIGN_HASH()) { |
463 | my $last = $op->last; |
464 | my $lastix = do { |
465 | local *B::OP::bsave = *B::OP::bsave_fat; |
466 | local *B::UNOP::bsave = *B::UNOP::bsave_fat; |
467 | $last->ix; |
468 | }; |
469 | asm "ldop", $lastix unless $lastix == $opix; |
470 | asm "op_targ", $last->targ; |
471 | $op->B::OP::bsave($ix); |
472 | asm "op_last", $lastix; |
473 | } else { |
474 | $op->B::OP::bsave($ix); |
475 | } |
476 | } |
477 | |
478 | # not needed if no pseudohashes |
479 | |
f66c782a |
480 | *B::BINOP::bsave = *B::OP::bsave if VERSION >= 5.009; |
1df34986 |
481 | |
482 | # deal with sort / formline |
483 | |
484 | sub B::LISTOP::bsave { |
485 | my ($op, $ix) = @_; |
486 | my $name = $op->name; |
f66c782a |
487 | sub blocksort() { OPf_SPECIAL|OPf_STACKED } |
488 | if ($name eq 'sort' && ($op->flags & blocksort) == blocksort) { |
1df34986 |
489 | my $first = $op->first; |
f66c782a |
490 | my $pushmark = $first->sibling; |
491 | my $rvgv = $pushmark->first; |
492 | my $leave = $rvgv->first; |
493 | |
494 | my $leaveix = $leave->ix; |
495 | |
496 | my $rvgvix = $rvgv->ix; |
497 | asm "ldop", $rvgvix unless $rvgvix == $opix; |
498 | asm "op_first", $leaveix; |
499 | |
500 | my $pushmarkix = $pushmark->ix; |
501 | asm "ldop", $pushmarkix unless $pushmarkix == $opix; |
502 | asm "op_first", $rvgvix; |
503 | |
1df34986 |
504 | my $firstix = $first->ix; |
1df34986 |
505 | asm "ldop", $firstix unless $firstix == $opix; |
f66c782a |
506 | asm "op_sibling", $pushmarkix; |
507 | |
1df34986 |
508 | $op->B::OP::bsave($ix); |
509 | asm "op_first", $firstix; |
510 | } elsif ($name eq 'formline') { |
511 | $op->B::UNOP::bsave_fat($ix); |
a798dbf2 |
512 | } else { |
1df34986 |
513 | $op->B::OP::bsave($ix); |
a798dbf2 |
514 | } |
a798dbf2 |
515 | } |
516 | |
1df34986 |
517 | # fat versions |
a798dbf2 |
518 | |
1df34986 |
519 | sub B::OP::bsave_fat { |
520 | my ($op, $ix) = @_; |
521 | my $siblix = $op->sibling->ix; |
a798dbf2 |
522 | |
1df34986 |
523 | $op->B::OP::bsave_thin($ix); |
524 | asm "op_sibling", $siblix; |
525 | # asm "op_seq", -1; XXX don't allocate OPs piece by piece |
a798dbf2 |
526 | } |
527 | |
1df34986 |
528 | sub B::UNOP::bsave_fat { |
529 | my ($op,$ix) = @_; |
530 | my $firstix = $op->first->ix; |
a798dbf2 |
531 | |
1df34986 |
532 | $op->B::OP::bsave($ix); |
533 | asm "op_first", $firstix; |
a798dbf2 |
534 | } |
535 | |
1df34986 |
536 | sub B::BINOP::bsave_fat { |
537 | my ($op,$ix) = @_; |
538 | my $last = $op->last; |
539 | my $lastix = $op->last->ix; |
f66c782a |
540 | if (VERSION < 5.009 && $op->name eq 'aassign' && $last->name eq 'null') { |
1df34986 |
541 | asm "ldop", $lastix unless $lastix == $opix; |
542 | asm "op_targ", $last->targ; |
a798dbf2 |
543 | } |
a798dbf2 |
544 | |
1df34986 |
545 | $op->B::UNOP::bsave($ix); |
546 | asm "op_last", $lastix; |
a798dbf2 |
547 | } |
548 | |
1df34986 |
549 | sub B::LOGOP::bsave { |
550 | my ($op,$ix) = @_; |
551 | my $otherix = $op->other->ix; |
a798dbf2 |
552 | |
1df34986 |
553 | $op->B::UNOP::bsave($ix); |
554 | asm "op_other", $otherix; |
a798dbf2 |
555 | } |
556 | |
1df34986 |
557 | sub B::PMOP::bsave { |
558 | my ($op,$ix) = @_; |
559 | my ($rrop, $rrarg, $rstart); |
059a8bb7 |
560 | |
1df34986 |
561 | # my $pmnextix = $op->pmnext->ix; # XXX |
059a8bb7 |
562 | |
f66c782a |
563 | if (ITHREADS) { |
1df34986 |
564 | if ($op->name eq 'subst') { |
565 | $rrop = "op_pmreplroot"; |
566 | $rrarg = $op->pmreplroot->ix; |
567 | $rstart = $op->pmreplstart->ix; |
568 | } elsif ($op->name eq 'pushre') { |
569 | $rrop = "op_pmreplrootpo"; |
570 | $rrarg = $op->pmreplroot; |
a798dbf2 |
571 | } |
1df34986 |
572 | $op->B::BINOP::bsave($ix); |
573 | asm "op_pmstashpv", pvix $op->pmstashpv; |
574 | } else { |
575 | $rrop = "op_pmreplrootgv"; |
576 | $rrarg = $op->pmreplroot->ix; |
577 | $rstart = $op->pmreplstart->ix if $op->name eq 'subst'; |
578 | my $stashix = $op->pmstash->ix; |
579 | $op->B::BINOP::bsave($ix); |
580 | asm "op_pmstash", $stashix; |
a798dbf2 |
581 | } |
1df34986 |
582 | |
583 | asm $rrop, $rrarg if $rrop; |
584 | asm "op_pmreplstart", $rstart if $rstart; |
585 | |
586 | asm "op_pmflags", $op->pmflags; |
587 | asm "op_pmpermflags", $op->pmpermflags; |
588 | asm "op_pmdynflags", $op->pmdynflags; |
589 | # asm "op_pmnext", $pmnextix; # XXX |
590 | asm "newpv", pvstring $op->precomp; |
591 | asm "pregcomp"; |
a798dbf2 |
592 | } |
593 | |
1df34986 |
594 | sub B::SVOP::bsave { |
595 | my ($op,$ix) = @_; |
596 | my $svix = $op->sv->ix; |
597 | |
598 | $op->B::OP::bsave($ix); |
599 | asm "op_sv", $svix; |
a798dbf2 |
600 | } |
601 | |
1df34986 |
602 | sub B::PADOP::bsave { |
603 | my ($op,$ix) = @_; |
604 | |
605 | $op->B::OP::bsave($ix); |
606 | asm "op_padix", $op->padix; |
a798dbf2 |
607 | } |
608 | |
1df34986 |
609 | sub B::PVOP::bsave { |
610 | my ($op,$ix) = @_; |
611 | $op->B::OP::bsave($ix); |
612 | return unless my $pv = $op->pv; |
613 | |
614 | if ($op->name eq 'trans') { |
615 | asm "op_pv_tr", join ',', length($pv)/2, unpack("s*", $pv); |
616 | } else { |
617 | asm "newpv", pvstring $pv; |
618 | asm "op_pv"; |
a798dbf2 |
619 | } |
a798dbf2 |
620 | } |
621 | |
1df34986 |
622 | sub B::LOOP::bsave { |
623 | my ($op,$ix) = @_; |
624 | my $nextix = $op->nextop->ix; |
625 | my $lastix = $op->lastop->ix; |
626 | my $redoix = $op->redoop->ix; |
627 | |
628 | $op->B::BINOP::bsave($ix); |
629 | asm "op_redoop", $redoix; |
630 | asm "op_nextop", $nextix; |
631 | asm "op_lastop", $lastix; |
a798dbf2 |
632 | } |
633 | |
1df34986 |
634 | sub B::COP::bsave { |
635 | my ($cop,$ix) = @_; |
636 | my $warnix = $cop->warnings->ix; |
f66c782a |
637 | if (ITHREADS) { |
1df34986 |
638 | $cop->B::OP::bsave($ix); |
639 | asm "cop_stashpv", pvix $cop->stashpv; |
640 | asm "cop_file", pvix $cop->file; |
641 | } else { |
642 | my $stashix = $cop->stash->ix; |
643 | my $fileix = $cop->filegv->ix(1); |
644 | $cop->B::OP::bsave($ix); |
645 | asm "cop_stash", $stashix; |
646 | asm "cop_filegv", $fileix; |
a798dbf2 |
647 | } |
1df34986 |
648 | asm "cop_label", pvix $cop->label if $cop->label; # XXX AD |
649 | asm "cop_seq", $cop->cop_seq; |
650 | asm "cop_arybase", $cop->arybase; |
651 | asm "cop_line", $cop->line; |
652 | asm "cop_warnings", $warnix; |
a798dbf2 |
653 | } |
654 | |
1df34986 |
655 | sub B::OP::opwalk { |
656 | my $op = shift; |
657 | my $ix = $optab{$$op}; |
658 | defined($ix) ? $ix : do { |
659 | my $ix; |
660 | my @oplist = $op->oplist; |
661 | push @cloop, undef; |
662 | $ix = $_->ix while $_ = pop @oplist; |
663 | while ($_ = pop @cloop) { |
664 | asm "ldop", $optab{$$_}; |
665 | asm "op_next", $optab{${$_->next}}; |
a798dbf2 |
666 | } |
1df34986 |
667 | $ix; |
a798dbf2 |
668 | } |
669 | } |
670 | |
1df34986 |
671 | ################################################# |
672 | |
673 | sub save_cq { |
674 | my $av; |
675 | if (($av=begin_av)->isa("B::AV")) { |
676 | if ($savebegins) { |
677 | for ($av->ARRAY) { |
678 | next unless $_->FILE eq $0; |
679 | asm "push_begin", $_->ix; |
680 | } |
681 | } else { |
682 | for ($av->ARRAY) { |
683 | next unless $_->FILE eq $0; |
566ece03 |
684 | # XXX BEGIN { goto A while 1; A: } |
1df34986 |
685 | for (my $op = $_->START; $$op; $op = $op->next) { |
566ece03 |
686 | next unless $op->name eq 'require' || |
687 | # this kludge needed for tests |
688 | $op->name eq 'gv' && do { |
689 | my $gv = class($op) eq 'SVOP' ? |
690 | $op->gv : |
691 | (($_->PADLIST->ARRAY)[1]->ARRAY)[$op->padix]; |
692 | $$gv && $gv->NAME =~ /use_ok|plan/ |
693 | }; |
1df34986 |
694 | asm "push_begin", $_->ix; |
695 | last; |
059a8bb7 |
696 | } |
059a8bb7 |
697 | } |
698 | } |
a798dbf2 |
699 | } |
1df34986 |
700 | if (($av=init_av)->isa("B::AV")) { |
701 | for ($av->ARRAY) { |
702 | next unless $_->FILE eq $0; |
703 | asm "push_init", $_->ix; |
059a8bb7 |
704 | } |
705 | } |
1df34986 |
706 | if (($av=end_av)->isa("B::AV")) { |
707 | for ($av->ARRAY) { |
708 | next unless $_->FILE eq $0; |
709 | asm "push_end", $_->ix; |
059a8bb7 |
710 | } |
a798dbf2 |
711 | } |
712 | } |
713 | |
a798dbf2 |
714 | sub compile { |
566ece03 |
715 | my ($head, $scan, $T_inhinc, $keep_syn); |
1df34986 |
716 | my $cwd = ''; |
717 | $files{$0} = 1; |
718 | sub keep_syn { |
719 | $keep_syn = 1; |
720 | *B::OP::bsave = *B::OP::bsave_fat; |
721 | *B::UNOP::bsave = *B::UNOP::bsave_fat; |
722 | *B::BINOP::bsave = *B::BINOP::bsave_fat; |
723 | *B::LISTOP::bsave = *B::LISTOP::bsave_fat; |
724 | } |
725 | sub bwarn { print STDERR "Bytecode.pm: @_\n" } |
726 | |
727 | for (@_) { |
728 | if (/^-S/) { |
729 | *newasm = *endasm = sub { }; |
730 | *asm = sub { print " @_\n" }; |
731 | *nice = sub ($) { print "\n@_\n" }; |
732 | } elsif (/^-H/) { |
733 | require ByteLoader; |
734 | $head = "#! $^X\nuse ByteLoader $ByteLoader::VERSION;\n"; |
735 | } elsif (/^-k/) { |
736 | keep_syn; |
737 | } elsif (/^-o(.*)$/) { |
566ece03 |
738 | open STDOUT, ">$1" or die "open $1: $!"; |
1df34986 |
739 | } elsif (/^-f(.*)$/) { |
740 | $files{$1} = 1; |
566ece03 |
741 | } elsif (/^-s(.*)$/) { |
742 | $scan = length($1) ? $1 : $0; |
1df34986 |
743 | } elsif (/^-b/) { |
744 | $savebegins = 1; |
566ece03 |
745 | # this is here for the testsuite |
746 | } elsif (/^-TI/) { |
1df34986 |
747 | $T_inhinc = 1; |
566ece03 |
748 | } elsif (/^-TF(.*)/) { |
749 | my $thatfile = $1; |
750 | *B::COP::file = sub { $thatfile }; |
a798dbf2 |
751 | } else { |
1df34986 |
752 | bwarn "Ignoring '$_' option"; |
a798dbf2 |
753 | } |
1df34986 |
754 | } |
755 | if ($scan) { |
566ece03 |
756 | my $f; |
47682f07 |
757 | if (open $f, $scan) { |
758 | while (<$f>) { |
759 | /^#\s*line\s+\d+\s+("?)(.*)\1/ and $files{$2} = 1; |
760 | /^#/ and next; |
761 | if (/\bgoto\b\s*[^&]/ && !$keep_syn) { |
762 | bwarn "keeping the syntax tree: \"goto\" op found"; |
763 | keep_syn; |
764 | } |
a798dbf2 |
765 | } |
47682f07 |
766 | } else { |
767 | bwarn "cannot rescan '$scan'"; |
1df34986 |
768 | } |
566ece03 |
769 | close $f; |
1df34986 |
770 | } |
771 | binmode STDOUT; |
772 | return sub { |
773 | print $head if $head; |
774 | newasm sub { print @_ }; |
775 | |
776 | defstash->bwalk; |
777 | asm "main_start", main_start->opwalk; |
778 | asm "main_root", main_root->ix; |
779 | asm "main_cv", main_cv->ix; |
780 | asm "curpad", (comppadlist->ARRAY)[1]->ix; |
781 | |
782 | asm "signal", cstring "__WARN__" # XXX |
783 | if warnhook->ix; |
784 | asm "incav", inc_gv->AV->ix if $T_inhinc; |
785 | save_cq; |
786 | asm "incav", inc_gv->AV->ix if $T_inhinc; |
787 | asm "dowarn", dowarn; |
788 | |
789 | { |
790 | no strict 'refs'; |
791 | nice "<DATA>"; |
792 | my $dh = *{defstash->NAME."::DATA"}; |
f66c782a |
793 | unless (eof $dh) { |
794 | local undef $/; |
1df34986 |
795 | asm "data", ord 'D'; |
f66c782a |
796 | print <$dh>; |
a798dbf2 |
797 | } else { |
1df34986 |
798 | asm "ret"; |
a798dbf2 |
799 | } |
a798dbf2 |
800 | } |
1df34986 |
801 | |
802 | endasm; |
a798dbf2 |
803 | } |
804 | } |
805 | |
806 | 1; |
566ece03 |
807 | |
808 | =head1 NAME |
809 | |
810 | B::Bytecode - Perl compiler's bytecode backend |
811 | |
812 | =head1 SYNOPSIS |
813 | |
814 | B<perl -MO=Bytecode>[B<,-H>][B<,-o>I<script.plc>] I<script.pl> |
815 | |
816 | =head1 DESCRIPTION |
817 | |
818 | Compiles a Perl script into a bytecode format that could be loaded |
819 | later by the ByteLoader module and executed as a regular Perl script. |
820 | |
821 | =head1 EXAMPLE |
822 | |
823 | $ perl -MO=Bytecode,-H,-ohi -e 'print "hi!\n"' |
824 | $ perl hi |
825 | hi! |
826 | |
827 | =head1 OPTIONS |
828 | |
829 | =over 4 |
830 | |
831 | =item B<-b> |
832 | |
833 | Save all the BEGIN blocks. Normally only BEGIN blocks that C<require> |
834 | other files (ex. C<use Foo;>) are saved. |
835 | |
836 | =item B<-H> |
837 | |
838 | prepend a C<use ByteLoader VERSION;> line to the produced bytecode. |
839 | |
840 | =item B<-k> |
841 | |
842 | keep the syntax tree - it is stripped by default. |
843 | |
844 | =item B<-o>I<outfile> |
845 | |
846 | put the bytecode in <outfile> instead of dumping it to STDOUT. |
847 | |
848 | =item B<-s> |
849 | |
850 | scan the script for C<# line ..> directives and for <goto LABEL> |
851 | expressions. When gotos are found keep the syntax tree. |
852 | |
853 | =back |
854 | |
855 | =head1 KNOWN BUGS |
856 | |
857 | =over 4 |
858 | |
859 | =item * |
860 | |
861 | C<BEGIN { goto A: while 1; A: }> won't even compile. |
862 | |
863 | =item * |
864 | |
865 | C<?...?> and C<reset> do not work as expected. |
866 | |
867 | =item * |
868 | |
869 | variables in C<(?{ ... })> constructs are not properly scoped. |
870 | |
871 | =item * |
872 | |
873 | scripts that use source filters will fail miserably. |
874 | |
875 | =back |
876 | |
877 | =head1 NOTICE |
878 | |
879 | There are also undocumented bugs and options. |
880 | |
881 | THIS CODE IS HIGHLY EXPERIMENTAL. USE AT YOUR OWN RISK. |
882 | |
883 | =head1 AUTHORS |
884 | |
885 | Originally written by Malcolm Beattie <mbeattie@sable.ox.ac.uk> and |
886 | modified by Benjamin Stuhl <sho_pi@hotmail.com>. |
887 | |
888 | Rewritten by Enache Adrian <enache@rdslink.ro>, 2003 a.d. |
889 | |
890 | =cut |