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implement C<goto &func> and other fixes (via private mail)
[perl5.git] / ext / B / B / C.pm
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1# C.pm
2#
1a52ab62 3# Copyright (c) 1996, 1997, 1998 Malcolm Beattie
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4#
5# You may distribute under the terms of either the GNU General Public
6# License or the Artistic License, as specified in the README file.
7#
8package B::C;
9use Exporter ();
10@ISA = qw(Exporter);
11@EXPORT_OK = qw(output_all output_boilerplate output_main
12 init_sections set_callback save_unused_subs objsym);
13
14use B qw(minus_c sv_undef walkoptree walksymtable main_root main_start peekop
15 class cstring cchar svref_2object compile_stats comppadlist hash
5cfd8ad4 16 threadsv_names main_cv );
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17use B::Asmdata qw(@specialsv_name);
18
19use FileHandle;
20use Carp;
21use strict;
22
23my $hv_index = 0;
24my $gv_index = 0;
25my $re_index = 0;
26my $pv_index = 0;
27my $anonsub_index = 0;
28
29my %symtable;
30my $warn_undefined_syms;
31my $verbose;
32my @unused_sub_packages;
33my $nullop_count;
34my $pv_copy_on_grow;
35my ($debug_cops, $debug_av, $debug_cv, $debug_mg);
36
37my @threadsv_names;
38BEGIN {
39 @threadsv_names = threadsv_names();
40}
41
42# Code sections
43my ($init, $decl, $symsect, $binopsect, $condopsect, $copsect, $cvopsect,
44 $gvopsect, $listopsect, $logopsect, $loopsect, $opsect, $pmopsect,
45 $pvopsect, $svopsect, $unopsect, $svsect, $xpvsect, $xpvavsect,
46 $xpvhvsect, $xpvcvsect, $xpvivsect, $xpvnvsect, $xpvmgsect, $xpvlvsect,
47 $xrvsect, $xpvbmsect, $xpviosect);
48
49sub walk_and_save_optree;
50my $saveoptree_callback = \&walk_and_save_optree;
51sub set_callback { $saveoptree_callback = shift }
52sub saveoptree { &$saveoptree_callback(@_) }
53
54sub walk_and_save_optree {
55 my ($name, $root, $start) = @_;
56 walkoptree($root, "save");
57 return objsym($start);
58}
59
60# Current workaround/fix for op_free() trying to free statically
61# defined OPs is to set op_seq = -1 and check for that in op_free().
62# Instead of hardwiring -1 in place of $op->seq, we use $op_seq
63# so that it can be changed back easily if necessary. In fact, to
64# stop compilers from moaning about a U16 being initialised with an
65# uncast -1 (the printf format is %d so we can't tweak it), we have
66# to "know" that op_seq is a U16 and use 65535. Ugh.
67my $op_seq = 65535;
68
69sub AVf_REAL () { 1 }
70
71# XXX This shouldn't really be hardcoded here but it saves
72# looking up the name of every BASEOP in B::OP
73sub OP_THREADSV () { 345 }
74
75sub savesym {
76 my ($obj, $value) = @_;
77 my $sym = sprintf("s\\_%x", $$obj);
78 $symtable{$sym} = $value;
79}
80
81sub objsym {
82 my $obj = shift;
83 return $symtable{sprintf("s\\_%x", $$obj)};
84}
85
86sub getsym {
87 my $sym = shift;
88 my $value;
89
90 return 0 if $sym eq "sym_0"; # special case
91 $value = $symtable{$sym};
92 if (defined($value)) {
93 return $value;
94 } else {
95 warn "warning: undefined symbol $sym\n" if $warn_undefined_syms;
96 return "UNUSED";
97 }
98}
99
100sub savepv {
101 my $pv = shift;
102 my $pvsym = 0;
103 my $pvmax = 0;
104 if ($pv_copy_on_grow) {
105 my $cstring = cstring($pv);
106 if ($cstring ne "0") { # sic
107 $pvsym = sprintf("pv%d", $pv_index++);
108 $decl->add(sprintf("static char %s[] = %s;", $pvsym, $cstring));
109 }
110 } else {
111 $pvmax = length($pv) + 1;
112 }
113 return ($pvsym, $pvmax);
114}
115
116sub B::OP::save {
117 my ($op, $level) = @_;
118 my $type = $op->type;
119 $nullop_count++ unless $type;
120 if ($type == OP_THREADSV) {
121 # saves looking up ppaddr but it's a bit naughty to hard code this
122 $init->add(sprintf("(void)find_threadsv(%s);",
123 cstring($threadsv_names[$op->targ])));
124 }
125 $opsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x",
126 ${$op->next}, ${$op->sibling}, $op->ppaddr, $op->targ,
127 $type, $op_seq, $op->flags, $op->private));
128 savesym($op, sprintf("&op_list[%d]", $opsect->index));
129}
130
131sub B::FAKEOP::new {
132 my ($class, %objdata) = @_;
133 bless \%objdata, $class;
134}
135
136sub B::FAKEOP::save {
137 my ($op, $level) = @_;
138 $opsect->add(sprintf("%s, %s, %s, %u, %u, %u, 0x%x, 0x%x",
139 $op->next, $op->sibling, $op->ppaddr, $op->targ,
140 $op->type, $op_seq, $op->flags, $op->private));
141 return sprintf("&op_list[%d]", $opsect->index);
142}
143
144sub B::FAKEOP::next { $_[0]->{"next"} || 0 }
145sub B::FAKEOP::type { $_[0]->{type} || 0}
146sub B::FAKEOP::sibling { $_[0]->{sibling} || 0 }
147sub B::FAKEOP::ppaddr { $_[0]->{ppaddr} || 0 }
148sub B::FAKEOP::targ { $_[0]->{targ} || 0 }
149sub B::FAKEOP::flags { $_[0]->{flags} || 0 }
150sub B::FAKEOP::private { $_[0]->{private} || 0 }
151
152sub B::UNOP::save {
153 my ($op, $level) = @_;
154 $unopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x",
155 ${$op->next}, ${$op->sibling}, $op->ppaddr,
156 $op->targ, $op->type, $op_seq, $op->flags,
157 $op->private, ${$op->first}));
158 savesym($op, sprintf("(OP*)&unop_list[%d]", $unopsect->index));
159}
160
161sub B::BINOP::save {
162 my ($op, $level) = @_;
163 $binopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x",
164 ${$op->next}, ${$op->sibling}, $op->ppaddr,
165 $op->targ, $op->type, $op_seq, $op->flags,
166 $op->private, ${$op->first}, ${$op->last}));
167 savesym($op, sprintf("(OP*)&binop_list[%d]", $binopsect->index));
168}
169
170sub B::LISTOP::save {
171 my ($op, $level) = @_;
172 $listopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, %u",
173 ${$op->next}, ${$op->sibling}, $op->ppaddr,
174 $op->targ, $op->type, $op_seq, $op->flags,
175 $op->private, ${$op->first}, ${$op->last},
176 $op->children));
177 savesym($op, sprintf("(OP*)&listop_list[%d]", $listopsect->index));
178}
179
180sub B::LOGOP::save {
181 my ($op, $level) = @_;
182 $logopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x",
183 ${$op->next}, ${$op->sibling}, $op->ppaddr,
184 $op->targ, $op->type, $op_seq, $op->flags,
185 $op->private, ${$op->first}, ${$op->other}));
186 savesym($op, sprintf("(OP*)&logop_list[%d]", $logopsect->index));
187}
188
189sub B::CONDOP::save {
190 my ($op, $level) = @_;
191 $condopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, s\\_%x",
192 ${$op->next}, ${$op->sibling}, $op->ppaddr,
193 $op->targ, $op->type, $op_seq, $op->flags,
194 $op->private, ${$op->first}, ${$op->true},
195 ${$op->false}));
196 savesym($op, sprintf("(OP*)&condop_list[%d]", $condopsect->index));
197}
198
199sub B::LOOP::save {
200 my ($op, $level) = @_;
201 #warn sprintf("LOOP: redoop %s, nextop %s, lastop %s\n",
202 # peekop($op->redoop), peekop($op->nextop),
203 # peekop($op->lastop)); # debug
204 $loopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, %u, s\\_%x, s\\_%x, s\\_%x",
205 ${$op->next}, ${$op->sibling}, $op->ppaddr,
206 $op->targ, $op->type, $op_seq, $op->flags,
207 $op->private, ${$op->first}, ${$op->last},
208 $op->children, ${$op->redoop}, ${$op->nextop},
209 ${$op->lastop}));
210 savesym($op, sprintf("(OP*)&loop_list[%d]", $loopsect->index));
211}
212
213sub B::PVOP::save {
214 my ($op, $level) = @_;
215 $pvopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, %s",
216 ${$op->next}, ${$op->sibling}, $op->ppaddr,
217 $op->targ, $op->type, $op_seq, $op->flags,
218 $op->private, cstring($op->pv)));
219 savesym($op, sprintf("(OP*)&pvop_list[%d]", $pvopsect->index));
220}
221
222sub B::SVOP::save {
223 my ($op, $level) = @_;
224 my $svsym = $op->sv->save;
225 $svopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, %s",
226 ${$op->next}, ${$op->sibling}, $op->ppaddr,
227 $op->targ, $op->type, $op_seq, $op->flags,
228 $op->private, "(SV*)$svsym"));
229 savesym($op, sprintf("(OP*)&svop_list[%d]", $svopsect->index));
230}
231
232sub B::GVOP::save {
233 my ($op, $level) = @_;
234 my $gvsym = $op->gv->save;
235 $gvopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, Nullgv",
236 ${$op->next}, ${$op->sibling}, $op->ppaddr,
237 $op->targ, $op->type, $op_seq, $op->flags,
238 $op->private));
239 $init->add(sprintf("gvop_list[%d].op_gv = %s;", $gvopsect->index, $gvsym));
240 savesym($op, sprintf("(OP*)&gvop_list[%d]", $gvopsect->index));
241}
242
243sub B::COP::save {
244 my ($op, $level) = @_;
245 my $gvsym = $op->filegv->save;
246 my $stashsym = $op->stash->save;
247 warn sprintf("COP: line %d file %s\n", $op->line, $op->filegv->SV->PV)
248 if $debug_cops;
249 $copsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, %s, Nullhv, Nullgv, %u, %d, %u",
250 ${$op->next}, ${$op->sibling}, $op->ppaddr,
251 $op->targ, $op->type, $op_seq, $op->flags,
252 $op->private, cstring($op->label), $op->cop_seq,
253 $op->arybase, $op->line));
254 my $copix = $copsect->index;
255 $init->add(sprintf("cop_list[%d].cop_filegv = %s;", $copix, $gvsym),
256 sprintf("cop_list[%d].cop_stash = %s;", $copix, $stashsym));
257 savesym($op, "(OP*)&cop_list[$copix]");
258}
259
260sub B::PMOP::save {
261 my ($op, $level) = @_;
262 my $replroot = $op->pmreplroot;
263 my $replstart = $op->pmreplstart;
264 my $replrootfield = sprintf("s\\_%x", $$replroot);
265 my $replstartfield = sprintf("s\\_%x", $$replstart);
266 my $gvsym;
267 my $ppaddr = $op->ppaddr;
268 if ($$replroot) {
269 # OP_PUSHRE (a mutated version of OP_MATCH for the regexp
270 # argument to a split) stores a GV in op_pmreplroot instead
271 # of a substitution syntax tree. We don't want to walk that...
272 if ($ppaddr eq "pp_pushre") {
273 $gvsym = $replroot->save;
274# warn "PMOP::save saving a pp_pushre with GV $gvsym\n"; # debug
275 $replrootfield = 0;
276 } else {
277 $replstartfield = saveoptree("*ignore*", $replroot, $replstart);
278 }
279 }
280 # pmnext handling is broken in perl itself, I think. Bad op_pmnext
281 # fields aren't noticed in perl's runtime (unless you try reset) but we
282 # segfault when trying to dereference it to find op->op_pmnext->op_type
283 $pmopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, %u, %s, %s, 0, 0, 0x%x, 0x%x",
284 ${$op->next}, ${$op->sibling}, $ppaddr, $op->targ,
285 $op->type, $op_seq, $op->flags, $op->private,
286 ${$op->first}, ${$op->last}, $op->children,
287 $replrootfield, $replstartfield,
288 $op->pmflags, $op->pmpermflags,));
289 my $pm = sprintf("pmop_list[%d]", $pmopsect->index);
290 my $re = $op->precomp;
291 if (defined($re)) {
292 my $resym = sprintf("re%d", $re_index++);
293 $decl->add(sprintf("static char *$resym = %s;", cstring($re)));
294 $init->add(sprintf("$pm.op_pmregexp = pregcomp($resym, $resym + %u, &$pm);",
295 length($re)));
296 }
297 if ($gvsym) {
298 $init->add("$pm.op_pmreplroot = (OP*)$gvsym;");
299 }
300 savesym($op, sprintf("(OP*)&pmop_list[%d]", $pmopsect->index));
301}
302
303sub B::SPECIAL::save {
304 my ($sv) = @_;
305 # special case: $$sv is not the address but an index into specialsv_list
306# warn "SPECIAL::save specialsv $$sv\n"; # debug
307 my $sym = $specialsv_name[$$sv];
308 if (!defined($sym)) {
309 confess "unknown specialsv index $$sv passed to B::SPECIAL::save";
310 }
311 return $sym;
312}
313
314sub B::OBJECT::save {}
315
316sub B::NULL::save {
317 my ($sv) = @_;
318 my $sym = objsym($sv);
319 return $sym if defined $sym;
320# warn "Saving SVt_NULL SV\n"; # debug
321 # debug
322 #if ($$sv == 0) {
323 # warn "NULL::save for sv = 0 called from @{[(caller(1))[3]]}\n";
324 #}
325 $svsect->add(sprintf("0, %u, 0x%x", $sv->REFCNT + 1, $sv->FLAGS));
326 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
327}
328
329sub B::IV::save {
330 my ($sv) = @_;
331 my $sym = objsym($sv);
332 return $sym if defined $sym;
333 $xpvivsect->add(sprintf("0, 0, 0, %d", $sv->IVX));
334 $svsect->add(sprintf("&xpviv_list[%d], %lu, 0x%x",
335 $xpvivsect->index, $sv->REFCNT + 1, $sv->FLAGS));
336 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
337}
338
339sub B::NV::save {
340 my ($sv) = @_;
341 my $sym = objsym($sv);
342 return $sym if defined $sym;
343 $xpvnvsect->add(sprintf("0, 0, 0, %d, %s", $sv->IVX, $sv->NVX));
344 $svsect->add(sprintf("&xpvnv_list[%d], %lu, 0x%x",
345 $xpvnvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
346 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
347}
348
349sub B::PVLV::save {
350 my ($sv) = @_;
351 my $sym = objsym($sv);
352 return $sym if defined $sym;
353 my $pv = $sv->PV;
354 my $len = length($pv);
355 my ($pvsym, $pvmax) = savepv($pv);
356 my ($lvtarg, $lvtarg_sym);
357 $xpvlvsect->add(sprintf("%s, %u, %u, %d, %g, 0, 0, %u, %u, 0, %s",
358 $pvsym, $len, $pvmax, $sv->IVX, $sv->NVX,
359 $sv->TARGOFF, $sv->TARGLEN, cchar($sv->TYPE)));
360 $svsect->add(sprintf("&xpvlv_list[%d], %lu, 0x%x",
361 $xpvlvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
362 if (!$pv_copy_on_grow) {
363 $init->add(sprintf("xpvlv_list[%d].xpv_pv = savepvn(%s, %u);",
364 $xpvlvsect->index, cstring($pv), $len));
365 }
366 $sv->save_magic;
367 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
368}
369
370sub B::PVIV::save {
371 my ($sv) = @_;
372 my $sym = objsym($sv);
373 return $sym if defined $sym;
374 my $pv = $sv->PV;
375 my $len = length($pv);
376 my ($pvsym, $pvmax) = savepv($pv);
377 $xpvivsect->add(sprintf("%s, %u, %u, %d", $pvsym, $len, $pvmax, $sv->IVX));
378 $svsect->add(sprintf("&xpviv_list[%d], %u, 0x%x",
379 $xpvivsect->index, $sv->REFCNT + 1, $sv->FLAGS));
380 if (!$pv_copy_on_grow) {
381 $init->add(sprintf("xpviv_list[%d].xpv_pv = savepvn(%s, %u);",
382 $xpvivsect->index, cstring($pv), $len));
383 }
384 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
385}
386
387sub B::PVNV::save {
388 my ($sv) = @_;
389 my $sym = objsym($sv);
390 return $sym if defined $sym;
391 my $pv = $sv->PV;
392 my $len = length($pv);
393 my ($pvsym, $pvmax) = savepv($pv);
394 $xpvnvsect->add(sprintf("%s, %u, %u, %d, %s",
395 $pvsym, $len, $pvmax, $sv->IVX, $sv->NVX));
396 $svsect->add(sprintf("&xpvnv_list[%d], %lu, 0x%x",
397 $xpvnvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
398 if (!$pv_copy_on_grow) {
399 $init->add(sprintf("xpvnv_list[%d].xpv_pv = savepvn(%s,%u);",
400 $xpvnvsect->index, cstring($pv), $len));
401 }
402 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
403}
404
405sub B::BM::save {
406 my ($sv) = @_;
407 my $sym = objsym($sv);
408 return $sym if defined $sym;
409 my $pv = $sv->PV . "\0" . $sv->TABLE;
410 my $len = length($pv);
411 $xpvbmsect->add(sprintf("0, %u, %u, %d, %s, 0, 0, %d, %u, 0x%x",
412 $len, $len + 258, $sv->IVX, $sv->NVX,
413 $sv->USEFUL, $sv->PREVIOUS, $sv->RARE));
414 $svsect->add(sprintf("&xpvbm_list[%d], %lu, 0x%x",
415 $xpvbmsect->index, $sv->REFCNT + 1, $sv->FLAGS));
416 $sv->save_magic;
417 $init->add(sprintf("xpvbm_list[%d].xpv_pv = savepvn(%s, %u);",
418 $xpvbmsect->index, cstring($pv), $len),
419 sprintf("xpvbm_list[%d].xpv_cur = %u;",
420 $xpvbmsect->index, $len - 257));
421 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
422}
423
424sub B::PV::save {
425 my ($sv) = @_;
426 my $sym = objsym($sv);
427 return $sym if defined $sym;
428 my $pv = $sv->PV;
429 my $len = length($pv);
430 my ($pvsym, $pvmax) = savepv($pv);
431 $xpvsect->add(sprintf("%s, %u, %u", $pvsym, $len, $pvmax));
432 $svsect->add(sprintf("&xpv_list[%d], %lu, 0x%x",
433 $xpvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
434 if (!$pv_copy_on_grow) {
435 $init->add(sprintf("xpv_list[%d].xpv_pv = savepvn(%s, %u);",
436 $xpvsect->index, cstring($pv), $len));
437 }
438 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
439}
440
441sub B::PVMG::save {
442 my ($sv) = @_;
443 my $sym = objsym($sv);
444 return $sym if defined $sym;
445 my $pv = $sv->PV;
446 my $len = length($pv);
447 my ($pvsym, $pvmax) = savepv($pv);
448 $xpvmgsect->add(sprintf("%s, %u, %u, %d, %s, 0, 0",
449 $pvsym, $len, $pvmax, $sv->IVX, $sv->NVX));
450 $svsect->add(sprintf("&xpvmg_list[%d], %lu, 0x%x",
451 $xpvmgsect->index, $sv->REFCNT + 1, $sv->FLAGS));
452 if (!$pv_copy_on_grow) {
453 $init->add(sprintf("xpvmg_list[%d].xpv_pv = savepvn(%s, %u);",
454 $xpvmgsect->index, cstring($pv), $len));
455 }
456 $sym = savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
457 $sv->save_magic;
458 return $sym;
459}
460
461sub B::PVMG::save_magic {
462 my ($sv) = @_;
463 #warn sprintf("saving magic for %s (0x%x)\n", class($sv), $$sv); # debug
464 my $stash = $sv->SvSTASH;
465 if ($$stash) {
466 warn sprintf("xmg_stash = %s (0x%x)\n", $stash->NAME, $$stash)
467 if $debug_mg;
468 # XXX Hope stash is already going to be saved.
469 $init->add(sprintf("SvSTASH(s\\_%x) = s\\_%x;", $$sv, $$stash));
470 }
471 my @mgchain = $sv->MAGIC;
472 my ($mg, $type, $obj, $ptr);
473 foreach $mg (@mgchain) {
474 $type = $mg->TYPE;
475 $obj = $mg->OBJ;
476 $ptr = $mg->PTR;
477 my $len = defined($ptr) ? length($ptr) : 0;
478 if ($debug_mg) {
479 warn sprintf("magic %s (0x%x), obj %s (0x%x), type %s, ptr %s\n",
480 class($sv), $$sv, class($obj), $$obj,
481 cchar($type), cstring($ptr));
482 }
483 $init->add(sprintf("sv_magic((SV*)s\\_%x, (SV*)s\\_%x, %s, %s, %d);",
484 $$sv, $$obj, cchar($type),cstring($ptr),$len));
485 }
486}
487
488sub B::RV::save {
489 my ($sv) = @_;
490 my $sym = objsym($sv);
491 return $sym if defined $sym;
492 $xrvsect->add($sv->RV->save);
493 $svsect->add(sprintf("&xrv_list[%d], %lu, 0x%x",
494 $xrvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
495 return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
496}
497
498sub try_autoload {
499 my ($cvstashname, $cvname) = @_;
500 warn sprintf("No definition for sub %s::%s\n", $cvstashname, $cvname);
501 # Handle AutoLoader classes explicitly. Any more general AUTOLOAD
502 # use should be handled by the class itself.
503 no strict 'refs';
504 my $isa = \@{"$cvstashname\::ISA"};
505 if (grep($_ eq "AutoLoader", @$isa)) {
506 warn "Forcing immediate load of sub derived from AutoLoader\n";
507 # Tweaked version of AutoLoader::AUTOLOAD
508 my $dir = $cvstashname;
509 $dir =~ s(::)(/)g;
510 eval { require "auto/$dir/$cvname.al" };
511 if ($@) {
512 warn qq(failed require "auto/$dir/$cvname.al": $@\n);
513 return 0;
514 } else {
515 return 1;
516 }
517 }
518}
519
520sub B::CV::save {
521 my ($cv) = @_;
522 my $sym = objsym($cv);
523 if (defined($sym)) {
524# warn sprintf("CV 0x%x already saved as $sym\n", $$cv); # debug
525 return $sym;
526 }
527 # Reserve a place in svsect and xpvcvsect and record indices
528 my $sv_ix = $svsect->index + 1;
529 $svsect->add("svix$sv_ix");
530 my $xpvcv_ix = $xpvcvsect->index + 1;
531 $xpvcvsect->add("xpvcvix$xpvcv_ix");
532 # Save symbol now so that GvCV() doesn't recurse back to us via CvGV()
533 $sym = savesym($cv, "&sv_list[$sv_ix]");
534 warn sprintf("saving CV 0x%x as $sym\n", $$cv) if $debug_cv;
535 my $gv = $cv->GV;
536 my $cvstashname = $gv->STASH->NAME;
537 my $cvname = $gv->NAME;
538 my $root = $cv->ROOT;
539 my $cvxsub = $cv->XSUB;
540 if (!$$root && !$cvxsub) {
541 if (try_autoload($cvstashname, $cvname)) {
542 # Recalculate root and xsub
543 $root = $cv->ROOT;
544 $cvxsub = $cv->XSUB;
545 if ($$root || $cvxsub) {
546 warn "Successful forced autoload\n";
547 }
548 }
549 }
550 my $startfield = 0;
551 my $padlist = $cv->PADLIST;
552 my $pv = $cv->PV;
553 my $xsub = 0;
554 my $xsubany = "Nullany";
555 if ($$root) {
556 warn sprintf("saving op tree for CV 0x%x, root = 0x%x\n",
557 $$cv, $$root) if $debug_cv;
558 my $ppname = "";
559 if ($$gv) {
560 my $stashname = $gv->STASH->NAME;
561 my $gvname = $gv->NAME;
562 if ($gvname ne "__ANON__") {
563 $ppname = (${$gv->FORM} == $$cv) ? "pp_form_" : "pp_sub_";
564 $ppname .= ($stashname eq "main") ?
565 $gvname : "$stashname\::$gvname";
566 $ppname =~ s/::/__/g;
567 }
568 }
569 if (!$ppname) {
570 $ppname = "pp_anonsub_$anonsub_index";
571 $anonsub_index++;
572 }
573 $startfield = saveoptree($ppname, $root, $cv->START, $padlist->ARRAY);
574 warn sprintf("done saving op tree for CV 0x%x, name %s, root 0x%x\n",
575 $$cv, $ppname, $$root) if $debug_cv;
576 if ($$padlist) {
577 warn sprintf("saving PADLIST 0x%x for CV 0x%x\n",
578 $$padlist, $$cv) if $debug_cv;
579 $padlist->save;
580 warn sprintf("done saving PADLIST 0x%x for CV 0x%x\n",
581 $$padlist, $$cv) if $debug_cv;
582 }
583 }
584 elsif ($cvxsub) {
585 $xsubany = sprintf("ANYINIT((void*)0x%x)", $cv->XSUBANY);
586 # Try to find out canonical name of XSUB function from EGV.
587 # XXX Doesn't work for XSUBs with PREFIX set (or anyone who
588 # calls newXS() manually with weird arguments).
589 my $egv = $gv->EGV;
590 my $stashname = $egv->STASH->NAME;
591 $stashname =~ s/::/__/g;
592 $xsub = sprintf("XS_%s_%s", $stashname, $egv->NAME);
593 $decl->add("void $xsub _((CV*));");
594 }
595 else {
596 warn sprintf("No definition for sub %s::%s (unable to autoload)\n",
597 $cvstashname, $cvname); # debug
598 }
5cfd8ad4 599 $symsect->add(sprintf("xpvcvix%d\t%s, %u, 0, %d, %s, 0, Nullhv, Nullhv, %s, s\\_%x, $xsub, $xsubany, Nullgv, Nullgv, %d, s\\_%x, (CV*)s\\_%x, 0x%x",
a798dbf2
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600 $xpvcv_ix, cstring($pv), length($pv), $cv->IVX,
601 $cv->NVX, $startfield, ${$cv->ROOT}, $cv->DEPTH,
5cfd8ad4
VB
602 $$padlist, ${$cv->OUTSIDE}, $cv->CvFLAGS));
603
604 if (${$cv->OUTSIDE} == ${main_cv()}){
605 $init->add(sprintf("CvOUTSIDE(s\\_%x)=PL_main_cv;",$$cv));
606 }
607
a798dbf2
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608 if ($$gv) {
609 $gv->save;
610 $init->add(sprintf("CvGV(s\\_%x) = s\\_%x;",$$cv,$$gv));
611 warn sprintf("done saving GV 0x%x for CV 0x%x\n",
612 $$gv, $$cv) if $debug_cv;
613 }
614 my $filegv = $cv->FILEGV;
615 if ($$filegv) {
616 $filegv->save;
617 $init->add(sprintf("CvFILEGV(s\\_%x) = s\\_%x;", $$cv, $$filegv));
618 warn sprintf("done saving FILEGV 0x%x for CV 0x%x\n",
619 $$filegv, $$cv) if $debug_cv;
620 }
621 my $stash = $cv->STASH;
622 if ($$stash) {
623 $stash->save;
624 $init->add(sprintf("CvSTASH(s\\_%x) = s\\_%x;", $$cv, $$stash));
625 warn sprintf("done saving STASH 0x%x for CV 0x%x\n",
626 $$stash, $$cv) if $debug_cv;
627 }
628 $symsect->add(sprintf("svix%d\t(XPVCV*)&xpvcv_list[%u], %lu, 0x%x",
629 $sv_ix, $xpvcv_ix, $cv->REFCNT + 1, $cv->FLAGS));
630 return $sym;
631}
632
633sub B::GV::save {
634 my ($gv) = @_;
635 my $sym = objsym($gv);
636 if (defined($sym)) {
637 #warn sprintf("GV 0x%x already saved as $sym\n", $$gv); # debug
638 return $sym;
639 } else {
640 my $ix = $gv_index++;
641 $sym = savesym($gv, "gv_list[$ix]");
642 #warn sprintf("Saving GV 0x%x as $sym\n", $$gv); # debug
643 }
644 my $gvname = $gv->NAME;
645 my $name = cstring($gv->STASH->NAME . "::" . $gvname);
646 #warn "GV name is $name\n"; # debug
647 my $egv = $gv->EGV;
648 my $egvsym;
649 if ($$gv != $$egv) {
650 #warn(sprintf("EGV name is %s, saving it now\n",
651 # $egv->STASH->NAME . "::" . $egv->NAME)); # debug
652 $egvsym = $egv->save;
653 }
654 $init->add(qq[$sym = gv_fetchpv($name, TRUE, SVt_PV);],
655 sprintf("SvFLAGS($sym) = 0x%x;", $gv->FLAGS),
656 sprintf("GvFLAGS($sym) = 0x%x;", $gv->GvFLAGS),
657 sprintf("GvLINE($sym) = %u;", $gv->LINE));
658 # Shouldn't need to do save_magic since gv_fetchpv handles that
659 #$gv->save_magic;
660 my $refcnt = $gv->REFCNT + 1;
661 $init->add(sprintf("SvREFCNT($sym) += %u;", $refcnt - 1)) if $refcnt > 1;
662 my $gvrefcnt = $gv->GvREFCNT;
663 if ($gvrefcnt > 1) {
664 $init->add(sprintf("GvREFCNT($sym) += %u;", $gvrefcnt - 1));
665 }
666 if (defined($egvsym)) {
667 # Shared glob *foo = *bar
668 $init->add("gp_free($sym);",
669 "GvGP($sym) = GvGP($egvsym);");
670 } elsif ($gvname !~ /^([^A-Za-z]|STDIN|STDOUT|STDERR|ARGV|SIG|ENV)$/) {
671 # Don't save subfields of special GVs (*_, *1, *# and so on)
672# warn "GV::save saving subfields\n"; # debug
673 my $gvsv = $gv->SV;
674 if ($$gvsv) {
675 $init->add(sprintf("GvSV($sym) = s\\_%x;", $$gvsv));
676# warn "GV::save \$$name\n"; # debug
677 $gvsv->save;
678 }
679 my $gvav = $gv->AV;
680 if ($$gvav) {
681 $init->add(sprintf("GvAV($sym) = s\\_%x;", $$gvav));
682# warn "GV::save \@$name\n"; # debug
683 $gvav->save;
684 }
685 my $gvhv = $gv->HV;
686 if ($$gvhv) {
687 $init->add(sprintf("GvHV($sym) = s\\_%x;", $$gvhv));
688# warn "GV::save \%$name\n"; # debug
689 $gvhv->save;
690 }
691 my $gvcv = $gv->CV;
692 if ($$gvcv) {
693 $init->add(sprintf("GvCV($sym) = (CV*)s\\_%x;", $$gvcv));
694# warn "GV::save &$name\n"; # debug
695 $gvcv->save;
696 }
697 my $gvfilegv = $gv->FILEGV;
698 if ($$gvfilegv) {
699 $init->add(sprintf("GvFILEGV($sym) = s\\_%x;",$$gvfilegv));
700# warn "GV::save GvFILEGV(*$name)\n"; # debug
701 $gvfilegv->save;
702 }
703 my $gvform = $gv->FORM;
704 if ($$gvform) {
705 $init->add(sprintf("GvFORM($sym) = (CV*)s\\_%x;", $$gvform));
706# warn "GV::save GvFORM(*$name)\n"; # debug
707 $gvform->save;
708 }
709 my $gvio = $gv->IO;
710 if ($$gvio) {
711 $init->add(sprintf("GvIOp($sym) = s\\_%x;", $$gvio));
712# warn "GV::save GvIO(*$name)\n"; # debug
713 $gvio->save;
714 }
715 }
716 return $sym;
717}
718sub B::AV::save {
719 my ($av) = @_;
720 my $sym = objsym($av);
721 return $sym if defined $sym;
722 my $avflags = $av->AvFLAGS;
723 $xpvavsect->add(sprintf("0, -1, -1, 0, 0.0, 0, Nullhv, 0, 0, 0x%x",
724 $avflags));
725 $svsect->add(sprintf("&xpvav_list[%d], %lu, 0x%x",
726 $xpvavsect->index, $av->REFCNT + 1, $av->FLAGS));
727 my $sv_list_index = $svsect->index;
728 my $fill = $av->FILL;
729 $av->save_magic;
730 warn sprintf("saving AV 0x%x FILL=$fill AvFLAGS=0x%x", $$av, $avflags)
731 if $debug_av;
732 # XXX AVf_REAL is wrong test: need to save comppadlist but not stack
733 #if ($fill > -1 && ($avflags & AVf_REAL)) {
734 if ($fill > -1) {
735 my @array = $av->ARRAY;
736 if ($debug_av) {
737 my $el;
738 my $i = 0;
739 foreach $el (@array) {
740 warn sprintf("AV 0x%x[%d] = %s 0x%x\n",
741 $$av, $i++, class($el), $$el);
742 }
743 }
744 my @names = map($_->save, @array);
745 # XXX Better ways to write loop?
746 # Perhaps svp[0] = ...; svp[1] = ...; svp[2] = ...;
747 # Perhaps I32 i = 0; svp[i++] = ...; svp[i++] = ...; svp[i++] = ...;
748 $init->add("{",
749 "\tSV **svp;",
750 "\tAV *av = (AV*)&sv_list[$sv_list_index];",
751 "\tav_extend(av, $fill);",
752 "\tsvp = AvARRAY(av);",
753 map("\t*svp++ = (SV*)$_;", @names),
754 "\tAvFILLp(av) = $fill;",
755 "}");
756 } else {
757 my $max = $av->MAX;
758 $init->add("av_extend((AV*)&sv_list[$sv_list_index], $max);")
759 if $max > -1;
760 }
761 return savesym($av, "(AV*)&sv_list[$sv_list_index]");
762}
763
764sub B::HV::save {
765 my ($hv) = @_;
766 my $sym = objsym($hv);
767 return $sym if defined $sym;
768 my $name = $hv->NAME;
769 if ($name) {
770 # It's a stash
771
772 # A perl bug means HvPMROOT isn't altered when a PMOP is freed. Usually
773 # the only symptom is that sv_reset tries to reset the PMf_USED flag of
774 # a trashed op but we look at the trashed op_type and segfault.
775 #my $adpmroot = ${$hv->PMROOT};
776 my $adpmroot = 0;
777 $decl->add("static HV *hv$hv_index;");
778 # XXX Beware of weird package names containing double-quotes, \n, ...?
779 $init->add(qq[hv$hv_index = gv_stashpv("$name", TRUE);]);
780 if ($adpmroot) {
781 $init->add(sprintf("HvPMROOT(hv$hv_index) = (PMOP*)s\\_%x;",
782 $adpmroot));
783 }
784 $sym = savesym($hv, "hv$hv_index");
785 $hv_index++;
786 return $sym;
787 }
788 # It's just an ordinary HV
789 $xpvhvsect->add(sprintf("0, 0, %d, 0, 0.0, 0, Nullhv, %d, 0, 0, 0",
790 $hv->MAX, $hv->RITER));
791 $svsect->add(sprintf("&xpvhv_list[%d], %lu, 0x%x",
792 $xpvhvsect->index, $hv->REFCNT + 1, $hv->FLAGS));
793 my $sv_list_index = $svsect->index;
794 my @contents = $hv->ARRAY;
795 if (@contents) {
796 my $i;
797 for ($i = 1; $i < @contents; $i += 2) {
798 $contents[$i] = $contents[$i]->save;
799 }
800 $init->add("{", "\tHV *hv = (HV*)&sv_list[$sv_list_index];");
801 while (@contents) {
802 my ($key, $value) = splice(@contents, 0, 2);
803 $init->add(sprintf("\thv_store(hv, %s, %u, %s, %s);",
804 cstring($key),length($key),$value, hash($key)));
805 }
806 $init->add("}");
807 }
808 return savesym($hv, "(HV*)&sv_list[$sv_list_index]");
809}
810
811sub B::IO::save {
812 my ($io) = @_;
813 my $sym = objsym($io);
814 return $sym if defined $sym;
815 my $pv = $io->PV;
816 my $len = length($pv);
817 $xpviosect->add(sprintf("0, %u, %u, %d, %s, 0, 0, 0, 0, 0, %d, %d, %d, %d, %s, Nullgv, %s, Nullgv, %s, Nullgv, %d, %s, 0x%x",
818 $len, $len+1, $io->IVX, $io->NVX, $io->LINES,
819 $io->PAGE, $io->PAGE_LEN, $io->LINES_LEFT,
820 cstring($io->TOP_NAME), cstring($io->FMT_NAME),
821 cstring($io->BOTTOM_NAME), $io->SUBPROCESS,
822 cchar($io->IoTYPE), $io->IoFLAGS));
823 $svsect->add(sprintf("&xpvio_list[%d], %lu, 0x%x",
824 $xpviosect->index, $io->REFCNT + 1, $io->FLAGS));
825 $sym = savesym($io, sprintf("(IO*)&sv_list[%d]", $svsect->index));
826 my ($field, $fsym);
827 foreach $field (qw(TOP_GV FMT_GV BOTTOM_GV)) {
828 $fsym = $io->$field();
829 if ($$fsym) {
830 $init->add(sprintf("Io$field($sym) = (GV*)s\\_%x;", $$fsym));
831 $fsym->save;
832 }
833 }
834 $io->save_magic;
835 return $sym;
836}
837
838sub B::SV::save {
839 my $sv = shift;
840 # This is where we catch an honest-to-goodness Nullsv (which gets
841 # blessed into B::SV explicitly) and any stray erroneous SVs.
842 return 0 unless $$sv;
843 confess sprintf("cannot save that type of SV: %s (0x%x)\n",
844 class($sv), $$sv);
845}
846
847sub output_all {
848 my $init_name = shift;
849 my $section;
850 my @sections = ($opsect, $unopsect, $binopsect, $logopsect, $condopsect,
851 $listopsect, $pmopsect, $svopsect, $gvopsect, $pvopsect,
852 $cvopsect, $loopsect, $copsect, $svsect, $xpvsect,
853 $xpvavsect, $xpvhvsect, $xpvcvsect, $xpvivsect, $xpvnvsect,
854 $xpvmgsect, $xpvlvsect, $xrvsect, $xpvbmsect, $xpviosect);
855 $symsect->output(\*STDOUT, "#define %s\n");
856 print "\n";
857 output_declarations();
858 foreach $section (@sections) {
859 my $lines = $section->index + 1;
860 if ($lines) {
861 my $name = $section->name;
862 my $typename = ($name eq "xpvcv") ? "XPVCV_or_similar" : uc($name);
863 print "Static $typename ${name}_list[$lines];\n";
864 }
865 }
866 $decl->output(\*STDOUT, "%s\n");
867 print "\n";
868 foreach $section (@sections) {
869 my $lines = $section->index + 1;
870 if ($lines) {
871 my $name = $section->name;
872 my $typename = ($name eq "xpvcv") ? "XPVCV_or_similar" : uc($name);
873 printf "static %s %s_list[%u] = {\n", $typename, $name, $lines;
874 $section->output(\*STDOUT, "\t{ %s },\n");
875 print "};\n\n";
876 }
877 }
878
879 print <<"EOT";
880static int $init_name()
881{
882 dTHR;
883EOT
884 $init->output(\*STDOUT, "\t%s\n");
885 print "\treturn 0;\n}\n";
886 if ($verbose) {
887 warn compile_stats();
888 warn "NULLOP count: $nullop_count\n";
889 }
890}
891
892sub output_declarations {
893 print <<'EOT';
894#ifdef BROKEN_STATIC_REDECL
895#define Static extern
896#else
897#define Static static
898#endif /* BROKEN_STATIC_REDECL */
899
900#ifdef BROKEN_UNION_INIT
901/*
902 * Cribbed from cv.h with ANY (a union) replaced by void*.
903 * Some pre-Standard compilers can't cope with initialising unions. Ho hum.
904 */
905typedef struct {
906 char * xpv_pv; /* pointer to malloced string */
907 STRLEN xpv_cur; /* length of xp_pv as a C string */
908 STRLEN xpv_len; /* allocated size */
909 IV xof_off; /* integer value */
910 double xnv_nv; /* numeric value, if any */
911 MAGIC* xmg_magic; /* magic for scalar array */
912 HV* xmg_stash; /* class package */
913
914 HV * xcv_stash;
915 OP * xcv_start;
916 OP * xcv_root;
917 void (*xcv_xsub) _((CV*));
918 void * xcv_xsubany;
919 GV * xcv_gv;
920 GV * xcv_filegv;
921 long xcv_depth; /* >= 2 indicates recursive call */
922 AV * xcv_padlist;
923 CV * xcv_outside;
924#ifdef USE_THREADS
925 perl_mutex *xcv_mutexp;
926 struct perl_thread *xcv_owner; /* current owner thread */
927#endif /* USE_THREADS */
928 U8 xcv_flags;
929} XPVCV_or_similar;
930#define ANYINIT(i) i
931#else
932#define XPVCV_or_similar XPVCV
933#define ANYINIT(i) {i}
934#endif /* BROKEN_UNION_INIT */
935#define Nullany ANYINIT(0)
936
937#define UNUSED 0
938#define sym_0 0
939
940EOT
941 print "static GV *gv_list[$gv_index];\n" if $gv_index;
942 print "\n";
943}
944
945
946sub output_boilerplate {
947 print <<'EOT';
948#include "EXTERN.h"
949#include "perl.h"
950#ifndef PATCHLEVEL
951#include "patchlevel.h"
952#endif
953
954/* Workaround for mapstart: the only op which needs a different ppaddr */
955#undef pp_mapstart
956#define pp_mapstart pp_grepstart
957
958static void xs_init _((void));
959static PerlInterpreter *my_perl;
960EOT
961}
962
963sub output_main {
964 print <<'EOT';
965int
966#ifndef CAN_PROTOTYPE
967main(argc, argv, env)
968int argc;
969char **argv;
970char **env;
971#else /* def(CAN_PROTOTYPE) */
972main(int argc, char **argv, char **env)
973#endif /* def(CAN_PROTOTYPE) */
974{
975 int exitstatus;
976 int i;
977 char **fakeargv;
978
979 PERL_SYS_INIT(&argc,&argv);
980
981 perl_init_i18nl10n(1);
982
81009501 983 if (!PL_do_undump) {
a798dbf2
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984 my_perl = perl_alloc();
985 if (!my_perl)
986 exit(1);
987 perl_construct( my_perl );
988 }
989
990#ifdef CSH
81009501
GS
991 if (!PL_cshlen)
992 PL_cshlen = strlen(PL_cshname);
a798dbf2
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993#endif
994
995#ifdef ALLOW_PERL_OPTIONS
996#define EXTRA_OPTIONS 2
997#else
998#define EXTRA_OPTIONS 3
999#endif /* ALLOW_PERL_OPTIONS */
1000 New(666, fakeargv, argc + EXTRA_OPTIONS + 1, char *);
1001 fakeargv[0] = argv[0];
1002 fakeargv[1] = "-e";
1003 fakeargv[2] = "";
1004#ifndef ALLOW_PERL_OPTIONS
1005 fakeargv[3] = "--";
1006#endif /* ALLOW_PERL_OPTIONS */
1007 for (i = 1; i < argc; i++)
1008 fakeargv[i + EXTRA_OPTIONS] = argv[i];
1009 fakeargv[argc + EXTRA_OPTIONS] = 0;
1010
1011 exitstatus = perl_parse(my_perl, xs_init, argc + EXTRA_OPTIONS,
1012 fakeargv, NULL);
1013 if (exitstatus)
1014 exit( exitstatus );
1015
1016 sv_setpv(GvSV(gv_fetchpv("0", TRUE, SVt_PV)), argv[0]);
81009501
GS
1017 PL_main_cv = PL_compcv;
1018 PL_compcv = 0;
a798dbf2
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1019
1020 exitstatus = perl_init();
1021 if (exitstatus)
1022 exit( exitstatus );
1023
1024 exitstatus = perl_run( my_perl );
1025
1026 perl_destruct( my_perl );
1027 perl_free( my_perl );
1028
1029 exit( exitstatus );
1030}
1031
1032static void
1033xs_init()
1034{
1035}
1036EOT
1037}
1038
1039sub dump_symtable {
1040 # For debugging
1041 my ($sym, $val);
1042 warn "----Symbol table:\n";
1043 while (($sym, $val) = each %symtable) {
1044 warn "$sym => $val\n";
1045 }
1046 warn "---End of symbol table\n";
1047}
1048
1049sub save_object {
1050 my $sv;
1051 foreach $sv (@_) {
1052 svref_2object($sv)->save;
1053 }
1054}
1055
1056sub B::GV::savecv {
1057 my $gv = shift;
1058 my $cv = $gv->CV;
1059 my $name = $gv->NAME;
1060 if ($$cv && !objsym($cv) && !($name eq "bootstrap" && $cv->XSUB)) {
1061 if ($debug_cv) {
1062 warn sprintf("saving extra CV &%s::%s (0x%x) from GV 0x%x\n",
1063 $gv->STASH->NAME, $name, $$cv, $$gv);
1064 }
1065 $gv->save;
1066 }
1067}
1068
1069sub save_unused_subs {
1070 my %search_pack;
1071 map { $search_pack{$_} = 1 } @_;
1072 no strict qw(vars refs);
1073 walksymtable(\%{"main::"}, "savecv", sub {
1074 my $package = shift;
1075 $package =~ s/::$//;
1076 #warn "Considering $package\n";#debug
1077 return 1 if exists $search_pack{$package};
1078 #warn " (nothing explicit)\n";#debug
1079 # Omit the packages which we use (and which cause grief
1080 # because of fancy "goto &$AUTOLOAD" stuff).
1081 # XXX Surely there must be a nicer way to do this.
1082 if ($package eq "FileHandle"
1083 || $package eq "Config"
1084 || $package eq "SelectSaver") {
1085 return 0;
1086 }
1087 my $m;
1088 foreach $m (qw(new DESTROY TIESCALAR TIEARRAY TIEHASH)) {
1089 if (defined(&{$package."::$m"})) {
1090 warn "$package has method $m: -u$package assumed\n";#debug
1091 return 1;
1092 }
1093 }
1094 return 0;
1095 });
1096}
1097
1098sub save_main {
5cfd8ad4 1099 my $curpad_nam = (comppadlist->ARRAY)[0]->save;
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1100 my $curpad_sym = (comppadlist->ARRAY)[1]->save;
1101 walkoptree(main_root, "save");
1102 warn "done main optree, walking symtable for extras\n" if $debug_cv;
1103 save_unused_subs(@unused_sub_packages);
1104
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1105 $init->add(sprintf("PL_main_root = s\\_%x;", ${main_root()}),
1106 sprintf("PL_main_start = s\\_%x;", ${main_start()}),
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1107 "PL_curpad = AvARRAY($curpad_sym);",
1108 "av_store(CvPADLIST(PL_main_cv),0,SvREFCNT_inc($curpad_nam));",
1109 "av_store(CvPADLIST(PL_main_cv),1,SvREFCNT_inc($curpad_sym));");
1110
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1111 output_boilerplate();
1112 print "\n";
1113 output_all("perl_init");
1114 print "\n";
1115 output_main();
1116}
1117
1118sub init_sections {
1119 my @sections = (init => \$init, decl => \$decl, sym => \$symsect,
1120 binop => \$binopsect, condop => \$condopsect,
1121 cop => \$copsect, cvop => \$cvopsect, gvop => \$gvopsect,
1122 listop => \$listopsect, logop => \$logopsect,
1123 loop => \$loopsect, op => \$opsect, pmop => \$pmopsect,
1124 pvop => \$pvopsect, svop => \$svopsect, unop => \$unopsect,
1125 sv => \$svsect, xpv => \$xpvsect, xpvav => \$xpvavsect,
1126 xpvhv => \$xpvhvsect, xpvcv => \$xpvcvsect,
1127 xpviv => \$xpvivsect, xpvnv => \$xpvnvsect,
1128 xpvmg => \$xpvmgsect, xpvlv => \$xpvlvsect,
1129 xrv => \$xrvsect, xpvbm => \$xpvbmsect,
1130 xpvio => \$xpviosect);
1131 my ($name, $sectref);
1132 while (($name, $sectref) = splice(@sections, 0, 2)) {
1133 $$sectref = new B::Section $name, \%symtable, 0;
1134 }
1135}
1136
1137sub compile {
1138 my @options = @_;
1139 my ($option, $opt, $arg);
1140 OPTION:
1141 while ($option = shift @options) {
1142 if ($option =~ /^-(.)(.*)/) {
1143 $opt = $1;
1144 $arg = $2;
1145 } else {
1146 unshift @options, $option;
1147 last OPTION;
1148 }
1149 if ($opt eq "-" && $arg eq "-") {
1150 shift @options;
1151 last OPTION;
1152 }
1153 if ($opt eq "w") {
1154 $warn_undefined_syms = 1;
1155 } elsif ($opt eq "D") {
1156 $arg ||= shift @options;
1157 foreach $arg (split(//, $arg)) {
1158 if ($arg eq "o") {
1159 B->debug(1);
1160 } elsif ($arg eq "c") {
1161 $debug_cops = 1;
1162 } elsif ($arg eq "A") {
1163 $debug_av = 1;
1164 } elsif ($arg eq "C") {
1165 $debug_cv = 1;
1166 } elsif ($arg eq "M") {
1167 $debug_mg = 1;
1168 } else {
1169 warn "ignoring unknown debug option: $arg\n";
1170 }
1171 }
1172 } elsif ($opt eq "o") {
1173 $arg ||= shift @options;
1174 open(STDOUT, ">$arg") or return "$arg: $!\n";
1175 } elsif ($opt eq "v") {
1176 $verbose = 1;
1177 } elsif ($opt eq "u") {
1178 $arg ||= shift @options;
1179 push(@unused_sub_packages, $arg);
1180 } elsif ($opt eq "f") {
1181 $arg ||= shift @options;
1182 if ($arg eq "cog") {
1183 $pv_copy_on_grow = 1;
1184 } elsif ($arg eq "no-cog") {
1185 $pv_copy_on_grow = 0;
1186 }
1187 } elsif ($opt eq "O") {
1188 $arg = 1 if $arg eq "";
1189 $pv_copy_on_grow = 0;
1190 if ($arg >= 1) {
1191 # Optimisations for -O1
1192 $pv_copy_on_grow = 1;
1193 }
1194 }
1195 }
1196 init_sections();
1197 if (@options) {
1198 return sub {
1199 my $objname;
1200 foreach $objname (@options) {
1201 eval "save_object(\\$objname)";
1202 }
1203 output_all();
1204 }
1205 } else {
1206 return sub { save_main() };
1207 }
1208}
1209
12101;
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1211
1212__END__
1213
1214=head1 NAME
1215
1216B::C - Perl compiler's C backend
1217
1218=head1 SYNOPSIS
1219
1220 perl -MO=C[,OPTIONS] foo.pl
1221
1222=head1 DESCRIPTION
1223
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1224This compiler backend takes Perl source and generates C source code
1225corresponding to the internal structures that perl uses to run
1226your program. When the generated C source is compiled and run, it
1227cuts out the time which perl would have taken to load and parse
1228your program into its internal semi-compiled form. That means that
1229compiling with this backend will not help improve the runtime
1230execution speed of your program but may improve the start-up time.
1231Depending on the environment in which your program runs this may be
1232either a help or a hindrance.
1233
1234=head1 OPTIONS
1235
1236If there are any non-option arguments, they are taken to be
1237names of objects to be saved (probably doesn't work properly yet).
1238Without extra arguments, it saves the main program.
1239
1240=over 4
1241
1242=item B<-ofilename>
1243
1244Output to filename instead of STDOUT
1245
1246=item B<-v>
1247
1248Verbose compilation (currently gives a few compilation statistics).
1249
1250=item B<-->
1251
1252Force end of options
1253
1254=item B<-uPackname>
1255
1256Force apparently unused subs from package Packname to be compiled.
1257This allows programs to use eval "foo()" even when sub foo is never
1258seen to be used at compile time. The down side is that any subs which
1259really are never used also have code generated. This option is
1260necessary, for example, if you have a signal handler foo which you
1261initialise with C<$SIG{BAR} = "foo">. A better fix, though, is just
1262to change it to C<$SIG{BAR} = \&foo>. You can have multiple B<-u>
1263options. The compiler tries to figure out which packages may possibly
1264have subs in which need compiling but the current version doesn't do
1265it very well. In particular, it is confused by nested packages (i.e.
1266of the form C<A::B>) where package C<A> does not contain any subs.
1267
1268=item B<-D>
1269
1270Debug options (concatenated or separate flags like C<perl -D>).
1271
1272=item B<-Do>
1273
1274OPs, prints each OP as it's processed
1275
1276=item B<-Dc>
1277
1278COPs, prints COPs as processed (incl. file & line num)
1279
1280=item B<-DA>
1281
1282prints AV information on saving
1283
1284=item B<-DC>
1285
1286prints CV information on saving
1287
1288=item B<-DM>
1289
1290prints MAGIC information on saving
1291
1292=item B<-f>
1293
1294Force optimisations on or off one at a time.
1295
1296=item B<-fcog>
1297
1298Copy-on-grow: PVs declared and initialised statically.
1299
1300=item B<-fno-cog>
1301
1302No copy-on-grow.
1303
1304=item B<-On>
1305
1306Optimisation level (n = 0, 1, 2, ...). B<-O> means B<-O1>. Currently,
1307B<-O1> and higher set B<-fcog>.
1308
1309=head1 EXAMPLES
1310
1311 perl -MO=C,-ofoo.c foo.pl
1312 perl cc_harness -o foo foo.c
1313
1314Note that C<cc_harness> lives in the C<B> subdirectory of your perl
1315library directory. The utility called C<perlcc> may also be used to
1316help make use of this compiler.
1317
1318 perl -MO=C,-v,-DcA bar.pl > /dev/null
1319
1320=head1 BUGS
1321
1322Plenty. Current status: experimental.
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1323
1324=head1 AUTHOR
1325
1326Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
1327
1328=cut