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