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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. |
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7 | |
1df34986 |
8 | package B::Bytecode; |
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9 | |
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10 | our $VERSION = '1.01'; |
11 | |
a798dbf2 |
12 | use strict; |
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13 | use Config; |
14 | use B qw(class main_cv main_root main_start cstring comppadlist |
15 | defstash curstash begin_av init_av end_av inc_gv warnhook diehook |
16 | dowarn SVt_PVGV SVt_PVHV OPf_SPECIAL OPf_STACKED OPf_MOD |
17 | OPpLVAL_INTRO SVf_FAKE SVf_READONLY); |
18 | use B::Asmdata qw(@specialsv_name); |
19 | use B::Assembler qw(asm newasm endasm); |
1df34986 |
20 | |
21 | ################################################# |
22 | |
f66c782a |
23 | my ($varix, $opix, $savebegins, %walked, %files, @cloop); |
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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 | ################################################# |
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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++; |
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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 {{{{ |
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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 |
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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{$$hv} = $varix = $ix = $tix++; |
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158 | asm "xhv_name", pvix $name; |
159 | # my $pmrootix = $hv->PMROOT->ix; # XXX |
160 | asm "ldsv", $varix = $ix unless $ix == $varix; |
161 | # asm "xhv_pmroot", $pmrootix; # XXX |
162 | } else { |
163 | nice "[HV]"; |
566ece03 |
164 | asm "newsvx", $hv->FLAGS; |
165 | $svtab{$$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; |
e1f6360a |
175 | if (VERSION >= 5.009) { |
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'); |
243 | } |
f66c782a |
244 | asm "xiv", !ITHREADS && $sv->FLAGS & (SVf_FAKE|SVf_READONLY) ? |
1df34986 |
245 | "0 but true" : $sv->IVX; |
a798dbf2 |
246 | } |
247 | |
1df34986 |
248 | sub B::PVNV::bsave { |
249 | my ($sv,$ix) = @_; |
250 | $sv->B::PVIV::bsave($ix); |
e1f6360a |
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 | } |
1df34986 |
260 | asm "xnv", sprintf "%.40g", $sv->NVX; |
a798dbf2 |
261 | } |
262 | |
1df34986 |
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; |
a798dbf2 |
271 | } |
a798dbf2 |
272 | |
1df34986 |
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 | } |
a798dbf2 |
285 | } |
286 | } |
287 | |
1df34986 |
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; |
1df34986 |
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; |
566ece03 |
344 | my $startix = $cv->START->opwalk; |
345 | my $rootix = $cv->ROOT->ix; |
1df34986 |
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; |
ecd04c98 |
377 | asm "av_extend", $av->MAX if $av->MAX >= 0; |
1df34986 |
378 | asm "av_pushx", $_ for @array; |
379 | asm "sv_refcnt", $av->REFCNT; |
e1f6360a |
380 | if (VERSION < 5.009) { |
381 | asm "xav_flags", $av->AvFLAGS; |
382 | } |
1df34986 |
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} |
a798dbf2 |
392 | } |
393 | |
1df34986 |
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 ($$hash && $hash->NAME) { |
402 | $hash->bwalk; |
403 | } |
404 | $v->ix(1) if desired $v; |
405 | } else { |
406 | nice "[prototype]"; |
566ece03 |
407 | asm "gv_fetchpvx", cstring $hv->NAME . "::$k"; |
408 | $svtab{$$v} = $varix = $tix; |
1df34986 |
409 | $v->bsave($tix++); |
566ece03 |
410 | asm "sv_flags", $v->FLAGS; |
1df34986 |
411 | } |
412 | } |
a798dbf2 |
413 | } |
414 | |
1df34986 |
415 | ###################################################### |
a798dbf2 |
416 | |
a798dbf2 |
417 | |
1df34986 |
418 | sub B::OP::bsave_thin { |
419 | my ($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; |
a798dbf2 |
426 | } |
1df34986 |
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; |
a798dbf2 |
431 | } |
432 | |
1df34986 |
433 | sub B::OP::bsave; |
434 | *B::OP::bsave = *B::OP::bsave_thin; |
a798dbf2 |
435 | |
1df34986 |
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 |
f66c782a |
444 | || (!ITHREADS && $name eq 'regcomp') |
1df34986 |
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 | |
566ece03 |
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 | |
f66c782a |
477 | *B::BINOP::bsave = *B::OP::bsave if VERSION >= 5.009; |
1df34986 |
478 | |
479 | # deal with sort / formline |
480 | |
481 | sub B::LISTOP::bsave { |
482 | my ($op, $ix) = @_; |
483 | my $name = $op->name; |
f66c782a |
484 | sub blocksort() { OPf_SPECIAL|OPf_STACKED } |
485 | if ($name eq 'sort' && ($op->flags & blocksort) == blocksort) { |
1df34986 |
486 | my $first = $op->first; |
f66c782a |
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 | |
1df34986 |
501 | my $firstix = $first->ix; |
1df34986 |
502 | asm "ldop", $firstix unless $firstix == $opix; |
f66c782a |
503 | asm "op_sibling", $pushmarkix; |
504 | |
1df34986 |
505 | $op->B::OP::bsave($ix); |
506 | asm "op_first", $firstix; |
507 | } elsif ($name eq 'formline') { |
508 | $op->B::UNOP::bsave_fat($ix); |
a798dbf2 |
509 | } else { |
1df34986 |
510 | $op->B::OP::bsave($ix); |
a798dbf2 |
511 | } |
a798dbf2 |
512 | } |
513 | |
1df34986 |
514 | # fat versions |
a798dbf2 |
515 | |
1df34986 |
516 | sub B::OP::bsave_fat { |
517 | my ($op, $ix) = @_; |
518 | my $siblix = $op->sibling->ix; |
a798dbf2 |
519 | |
1df34986 |
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 |
a798dbf2 |
523 | } |
524 | |
1df34986 |
525 | sub B::UNOP::bsave_fat { |
526 | my ($op,$ix) = @_; |
527 | my $firstix = $op->first->ix; |
a798dbf2 |
528 | |
1df34986 |
529 | $op->B::OP::bsave($ix); |
530 | asm "op_first", $firstix; |
a798dbf2 |
531 | } |
532 | |
1df34986 |
533 | sub B::BINOP::bsave_fat { |
534 | my ($op,$ix) = @_; |
535 | my $last = $op->last; |
536 | my $lastix = $op->last->ix; |
f66c782a |
537 | if (VERSION < 5.009 && $op->name eq 'aassign' && $last->name eq 'null') { |
1df34986 |
538 | asm "ldop", $lastix unless $lastix == $opix; |
539 | asm "op_targ", $last->targ; |
a798dbf2 |
540 | } |
a798dbf2 |
541 | |
1df34986 |
542 | $op->B::UNOP::bsave($ix); |
543 | asm "op_last", $lastix; |
a798dbf2 |
544 | } |
545 | |
1df34986 |
546 | sub B::LOGOP::bsave { |
547 | my ($op,$ix) = @_; |
548 | my $otherix = $op->other->ix; |
a798dbf2 |
549 | |
1df34986 |
550 | $op->B::UNOP::bsave($ix); |
551 | asm "op_other", $otherix; |
a798dbf2 |
552 | } |
553 | |
1df34986 |
554 | sub B::PMOP::bsave { |
555 | my ($op,$ix) = @_; |
556 | my ($rrop, $rrarg, $rstart); |
059a8bb7 |
557 | |
1df34986 |
558 | # my $pmnextix = $op->pmnext->ix; # XXX |
059a8bb7 |
559 | |
f66c782a |
560 | if (ITHREADS) { |
1df34986 |
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; |
a798dbf2 |
568 | } |
1df34986 |
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; |
a798dbf2 |
578 | } |
1df34986 |
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"; |
a798dbf2 |
589 | } |
590 | |
1df34986 |
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; |
a798dbf2 |
597 | } |
598 | |
1df34986 |
599 | sub B::PADOP::bsave { |
600 | my ($op,$ix) = @_; |
601 | |
602 | $op->B::OP::bsave($ix); |
603 | asm "op_padix", $op->padix; |
a798dbf2 |
604 | } |
605 | |
1df34986 |
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"; |
a798dbf2 |
616 | } |
a798dbf2 |
617 | } |
618 | |
1df34986 |
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; |
a798dbf2 |
629 | } |
630 | |
1df34986 |
631 | sub B::COP::bsave { |
632 | my ($cop,$ix) = @_; |
633 | my $warnix = $cop->warnings->ix; |
634 | my $ioix = $cop->io->ix; |
f66c782a |
635 | if (ITHREADS) { |
1df34986 |
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; |
a798dbf2 |
645 | } |
1df34986 |
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; |
a798dbf2 |
652 | } |
653 | |
1df34986 |
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{$$_}; |
664 | asm "op_next", $optab{${$_->next}}; |
a798dbf2 |
665 | } |
1df34986 |
666 | $ix; |
a798dbf2 |
667 | } |
668 | } |
669 | |
1df34986 |
670 | ################################################# |
671 | |
672 | sub save_cq { |
673 | my $av; |
674 | if (($av=begin_av)->isa("B::AV")) { |
675 | if ($savebegins) { |
676 | for ($av->ARRAY) { |
677 | next unless $_->FILE eq $0; |
678 | asm "push_begin", $_->ix; |
679 | } |
680 | } else { |
681 | for ($av->ARRAY) { |
682 | next unless $_->FILE eq $0; |
566ece03 |
683 | # XXX BEGIN { goto A while 1; A: } |
1df34986 |
684 | for (my $op = $_->START; $$op; $op = $op->next) { |
566ece03 |
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 | }; |
1df34986 |
693 | asm "push_begin", $_->ix; |
694 | last; |
059a8bb7 |
695 | } |
059a8bb7 |
696 | } |
697 | } |
a798dbf2 |
698 | } |
1df34986 |
699 | if (($av=init_av)->isa("B::AV")) { |
700 | for ($av->ARRAY) { |
701 | next unless $_->FILE eq $0; |
702 | asm "push_init", $_->ix; |
059a8bb7 |
703 | } |
704 | } |
1df34986 |
705 | if (($av=end_av)->isa("B::AV")) { |
706 | for ($av->ARRAY) { |
707 | next unless $_->FILE eq $0; |
708 | asm "push_end", $_->ix; |
059a8bb7 |
709 | } |
a798dbf2 |
710 | } |
711 | } |
712 | |
a798dbf2 |
713 | sub compile { |
566ece03 |
714 | my ($head, $scan, $T_inhinc, $keep_syn); |
1df34986 |
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 $ByteLoader::VERSION;\n"; |
734 | } elsif (/^-k/) { |
735 | keep_syn; |
736 | } elsif (/^-o(.*)$/) { |
566ece03 |
737 | open STDOUT, ">$1" or die "open $1: $!"; |
1df34986 |
738 | } elsif (/^-f(.*)$/) { |
739 | $files{$1} = 1; |
566ece03 |
740 | } elsif (/^-s(.*)$/) { |
741 | $scan = length($1) ? $1 : $0; |
1df34986 |
742 | } elsif (/^-b/) { |
743 | $savebegins = 1; |
566ece03 |
744 | # this is here for the testsuite |
745 | } elsif (/^-TI/) { |
1df34986 |
746 | $T_inhinc = 1; |
566ece03 |
747 | } elsif (/^-TF(.*)/) { |
748 | my $thatfile = $1; |
749 | *B::COP::file = sub { $thatfile }; |
a798dbf2 |
750 | } else { |
1df34986 |
751 | bwarn "Ignoring '$_' option"; |
a798dbf2 |
752 | } |
1df34986 |
753 | } |
754 | if ($scan) { |
566ece03 |
755 | my $f; |
47682f07 |
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 | } |
a798dbf2 |
764 | } |
47682f07 |
765 | } else { |
766 | bwarn "cannot rescan '$scan'"; |
1df34986 |
767 | } |
566ece03 |
768 | close $f; |
1df34986 |
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"}; |
f66c782a |
792 | unless (eof $dh) { |
793 | local undef $/; |
1df34986 |
794 | asm "data", ord 'D'; |
f66c782a |
795 | print <$dh>; |
a798dbf2 |
796 | } else { |
1df34986 |
797 | asm "ret"; |
a798dbf2 |
798 | } |
a798dbf2 |
799 | } |
1df34986 |
800 | |
801 | endasm; |
a798dbf2 |
802 | } |
803 | } |
804 | |
805 | 1; |
566ece03 |
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 |