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1 | # B.pm |
2 | # |
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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 | # |
8 | package B; |
9 | require DynaLoader; |
10 | require Exporter; |
11 | @ISA = qw(Exporter DynaLoader); |
12 | @EXPORT_OK = qw(byteload_fh byteload_string minus_c ppname |
13 | class peekop cast_I32 cstring cchar hash threadsv_names |
14 | main_root main_start main_cv svref_2object |
15 | walkoptree walkoptree_slow walkoptree_exec walksymtable |
16 | parents comppadlist sv_undef compile_stats timing_info); |
17 | |
18 | use strict; |
19 | @B::SV::ISA = 'B::OBJECT'; |
20 | @B::NULL::ISA = 'B::SV'; |
21 | @B::PV::ISA = 'B::SV'; |
22 | @B::IV::ISA = 'B::SV'; |
23 | @B::NV::ISA = 'B::IV'; |
24 | @B::RV::ISA = 'B::SV'; |
25 | @B::PVIV::ISA = qw(B::PV B::IV); |
26 | @B::PVNV::ISA = qw(B::PV B::NV); |
27 | @B::PVMG::ISA = 'B::PVNV'; |
28 | @B::PVLV::ISA = 'B::PVMG'; |
29 | @B::BM::ISA = 'B::PVMG'; |
30 | @B::AV::ISA = 'B::PVMG'; |
31 | @B::GV::ISA = 'B::PVMG'; |
32 | @B::HV::ISA = 'B::PVMG'; |
33 | @B::CV::ISA = 'B::PVMG'; |
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34 | @B::IO::ISA = 'B::PVMG'; |
35 | @B::FM::ISA = 'B::CV'; |
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36 | |
37 | @B::OP::ISA = 'B::OBJECT'; |
38 | @B::UNOP::ISA = 'B::OP'; |
39 | @B::BINOP::ISA = 'B::UNOP'; |
40 | @B::LOGOP::ISA = 'B::UNOP'; |
41 | @B::CONDOP::ISA = 'B::UNOP'; |
42 | @B::LISTOP::ISA = 'B::BINOP'; |
43 | @B::SVOP::ISA = 'B::OP'; |
44 | @B::GVOP::ISA = 'B::OP'; |
45 | @B::PVOP::ISA = 'B::OP'; |
46 | @B::CVOP::ISA = 'B::OP'; |
47 | @B::LOOP::ISA = 'B::LISTOP'; |
48 | @B::PMOP::ISA = 'B::LISTOP'; |
49 | @B::COP::ISA = 'B::OP'; |
50 | |
51 | @B::SPECIAL::ISA = 'B::OBJECT'; |
52 | |
53 | { |
54 | # Stop "-w" from complaining about the lack of a real B::OBJECT class |
55 | package B::OBJECT; |
56 | } |
57 | |
58 | my $debug; |
59 | my $op_count = 0; |
60 | my @parents = (); |
61 | |
62 | sub debug { |
63 | my ($class, $value) = @_; |
64 | $debug = $value; |
65 | walkoptree_debug($value); |
66 | } |
67 | |
68 | # sub OPf_KIDS; |
69 | # add to .xs for perl5.002 |
70 | sub OPf_KIDS () { 4 } |
71 | |
72 | sub class { |
73 | my $obj = shift; |
74 | my $name = ref $obj; |
75 | $name =~ s/^.*:://; |
76 | return $name; |
77 | } |
78 | |
79 | sub parents { \@parents } |
80 | |
81 | # For debugging |
82 | sub peekop { |
83 | my $op = shift; |
84 | return sprintf("%s (0x%x) %s", class($op), $$op, $op->ppaddr); |
85 | } |
86 | |
87 | sub walkoptree_slow { |
88 | my($op, $method, $level) = @_; |
89 | $op_count++; # just for statistics |
90 | $level ||= 0; |
91 | warn(sprintf("walkoptree: %d. %s\n", $level, peekop($op))) if $debug; |
92 | $op->$method($level); |
93 | if ($$op && ($op->flags & OPf_KIDS)) { |
94 | my $kid; |
95 | unshift(@parents, $op); |
96 | for ($kid = $op->first; $$kid; $kid = $kid->sibling) { |
97 | walkoptree_slow($kid, $method, $level + 1); |
98 | } |
99 | shift @parents; |
100 | } |
101 | } |
102 | |
103 | sub compile_stats { |
104 | return "Total number of OPs processed: $op_count\n"; |
105 | } |
106 | |
107 | sub timing_info { |
108 | my ($sec, $min, $hr) = localtime; |
109 | my ($user, $sys) = times; |
110 | sprintf("%02d:%02d:%02d user=$user sys=$sys", |
111 | $hr, $min, $sec, $user, $sys); |
112 | } |
113 | |
114 | my %symtable; |
115 | sub savesym { |
116 | my ($obj, $value) = @_; |
117 | # warn(sprintf("savesym: sym_%x => %s\n", $$obj, $value)); # debug |
118 | $symtable{sprintf("sym_%x", $$obj)} = $value; |
119 | } |
120 | |
121 | sub objsym { |
122 | my $obj = shift; |
123 | return $symtable{sprintf("sym_%x", $$obj)}; |
124 | } |
125 | |
126 | sub walkoptree_exec { |
127 | my ($op, $method, $level) = @_; |
128 | my ($sym, $ppname); |
129 | my $prefix = " " x $level; |
130 | for (; $$op; $op = $op->next) { |
131 | $sym = objsym($op); |
132 | if (defined($sym)) { |
133 | print $prefix, "goto $sym\n"; |
134 | return; |
135 | } |
136 | savesym($op, sprintf("%s (0x%lx)", class($op), $$op)); |
137 | $op->$method($level); |
138 | $ppname = $op->ppaddr; |
139 | if ($ppname =~ /^pp_(or|and|mapwhile|grepwhile|entertry)$/) { |
140 | print $prefix, uc($1), " => {\n"; |
141 | walkoptree_exec($op->other, $method, $level + 1); |
142 | print $prefix, "}\n"; |
143 | } elsif ($ppname eq "pp_match" || $ppname eq "pp_subst") { |
144 | my $pmreplstart = $op->pmreplstart; |
145 | if ($$pmreplstart) { |
146 | print $prefix, "PMREPLSTART => {\n"; |
147 | walkoptree_exec($pmreplstart, $method, $level + 1); |
148 | print $prefix, "}\n"; |
149 | } |
150 | } elsif ($ppname eq "pp_substcont") { |
151 | print $prefix, "SUBSTCONT => {\n"; |
152 | walkoptree_exec($op->other->pmreplstart, $method, $level + 1); |
153 | print $prefix, "}\n"; |
154 | $op = $op->other; |
155 | } elsif ($ppname eq "pp_cond_expr") { |
156 | # pp_cond_expr never returns op_next |
157 | print $prefix, "TRUE => {\n"; |
158 | walkoptree_exec($op->true, $method, $level + 1); |
159 | print $prefix, "}\n"; |
160 | $op = $op->false; |
161 | redo; |
162 | } elsif ($ppname eq "pp_range") { |
163 | print $prefix, "TRUE => {\n"; |
164 | walkoptree_exec($op->true, $method, $level + 1); |
165 | print $prefix, "}\n", $prefix, "FALSE => {\n"; |
166 | walkoptree_exec($op->false, $method, $level + 1); |
167 | print $prefix, "}\n"; |
168 | } elsif ($ppname eq "pp_enterloop") { |
169 | print $prefix, "REDO => {\n"; |
170 | walkoptree_exec($op->redoop, $method, $level + 1); |
171 | print $prefix, "}\n", $prefix, "NEXT => {\n"; |
172 | walkoptree_exec($op->nextop, $method, $level + 1); |
173 | print $prefix, "}\n", $prefix, "LAST => {\n"; |
174 | walkoptree_exec($op->lastop, $method, $level + 1); |
175 | print $prefix, "}\n"; |
176 | } elsif ($ppname eq "pp_subst") { |
177 | my $replstart = $op->pmreplstart; |
178 | if ($$replstart) { |
179 | print $prefix, "SUBST => {\n"; |
180 | walkoptree_exec($replstart, $method, $level + 1); |
181 | print $prefix, "}\n"; |
182 | } |
183 | } |
184 | } |
185 | } |
186 | |
187 | sub walksymtable { |
188 | my ($symref, $method, $recurse, $prefix) = @_; |
189 | my $sym; |
190 | no strict 'vars'; |
191 | local(*glob); |
192 | while (($sym, *glob) = each %$symref) { |
193 | if ($sym =~ /::$/) { |
194 | $sym = $prefix . $sym; |
195 | if ($sym ne "main::" && &$recurse($sym)) { |
196 | walksymtable(\%glob, $method, $recurse, $sym); |
197 | } |
198 | } else { |
199 | svref_2object(\*glob)->EGV->$method(); |
200 | } |
201 | } |
202 | } |
203 | |
204 | { |
205 | package B::Section; |
206 | my $output_fh; |
207 | my %sections; |
208 | |
209 | sub new { |
210 | my ($class, $section, $symtable, $default) = @_; |
211 | $output_fh ||= FileHandle->new_tmpfile; |
212 | my $obj = bless [-1, $section, $symtable, $default], $class; |
213 | $sections{$section} = $obj; |
214 | return $obj; |
215 | } |
216 | |
217 | sub get { |
218 | my ($class, $section) = @_; |
219 | return $sections{$section}; |
220 | } |
221 | |
222 | sub add { |
223 | my $section = shift; |
224 | while (defined($_ = shift)) { |
225 | print $output_fh "$section->[1]\t$_\n"; |
226 | $section->[0]++; |
227 | } |
228 | } |
229 | |
230 | sub index { |
231 | my $section = shift; |
232 | return $section->[0]; |
233 | } |
234 | |
235 | sub name { |
236 | my $section = shift; |
237 | return $section->[1]; |
238 | } |
239 | |
240 | sub symtable { |
241 | my $section = shift; |
242 | return $section->[2]; |
243 | } |
244 | |
245 | sub default { |
246 | my $section = shift; |
247 | return $section->[3]; |
248 | } |
249 | |
250 | sub output { |
251 | my ($section, $fh, $format) = @_; |
252 | my $name = $section->name; |
253 | my $sym = $section->symtable || {}; |
254 | my $default = $section->default; |
255 | |
256 | seek($output_fh, 0, 0); |
257 | while (<$output_fh>) { |
258 | chomp; |
259 | s/^(.*?)\t//; |
260 | if ($1 eq $name) { |
261 | s{(s\\_[0-9a-f]+)} { |
262 | exists($sym->{$1}) ? $sym->{$1} : $default; |
263 | }ge; |
264 | printf $fh $format, $_; |
265 | } |
266 | } |
267 | } |
268 | } |
269 | |
270 | bootstrap B; |
271 | |
272 | 1; |
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273 | |
274 | __END__ |
275 | |
276 | =head1 NAME |
277 | |
278 | B - The Perl Compiler |
279 | |
280 | =head1 SYNOPSIS |
281 | |
282 | use B; |
283 | |
284 | =head1 DESCRIPTION |
285 | |
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286 | The C<B> module supplies classes which allow a Perl program to delve |
287 | into its own innards. It is the module used to implement the |
288 | "backends" of the Perl compiler. Usage of the compiler does not |
289 | require knowledge of this module: see the F<O> module for the |
290 | user-visible part. The C<B> module is of use to those who want to |
291 | write new compiler backends. This documentation assumes that the |
292 | reader knows a fair amount about perl's internals including such |
293 | things as SVs, OPs and the internal symbol table and syntax tree |
294 | of a program. |
295 | |
296 | =head1 OVERVIEW OF CLASSES |
297 | |
298 | The C structures used by Perl's internals to hold SV and OP |
299 | information (PVIV, AV, HV, ..., OP, SVOP, UNOP, ...) are modelled on a |
300 | class hierarchy and the C<B> module gives access to them via a true |
301 | object hierarchy. Structure fields which point to other objects |
302 | (whether types of SV or types of OP) are represented by the C<B> |
303 | module as Perl objects of the appropriate class. The bulk of the C<B> |
304 | module is the methods for accessing fields of these structures. Note |
305 | that all access is read-only: you cannot modify the internals by |
306 | using this module. |
307 | |
308 | =head2 SV-RELATED CLASSES |
309 | |
310 | B::IV, B::NV, B::RV, B::PV, B::PVIV, B::PVNV, B::PVMG, B::BM, B::PVLV, |
311 | B::AV, B::HV, B::CV, B::GV, B::FM, B::IO. These classes correspond in |
312 | the obvious way to the underlying C structures of similar names. The |
313 | inheritance hierarchy mimics the underlying C "inheritance". Access |
314 | methods correspond to the underlying C macros for field access, |
315 | usually with the leading "class indication" prefix removed (Sv, Av, |
316 | Hv, ...). The leading prefix is only left in cases where its removal |
317 | would cause a clash in method name. For example, C<GvREFCNT> stays |
318 | as-is since its abbreviation would clash with the "superclass" method |
319 | C<REFCNT> (corresponding to the C function C<SvREFCNT>). |
320 | |
321 | =head2 B::SV METHODS |
322 | |
323 | =over 4 |
324 | |
325 | =item REFCNT |
326 | |
327 | =item FLAGS |
328 | |
329 | =back |
330 | |
331 | =head2 B::IV METHODS |
332 | |
333 | =over 4 |
334 | |
335 | =item IV |
336 | |
337 | =item IVX |
338 | |
339 | =item needs64bits |
340 | |
341 | =item packiv |
342 | |
343 | =back |
344 | |
345 | =head2 B::NV METHODS |
346 | |
347 | =over 4 |
348 | |
349 | =item NV |
350 | |
351 | =item NVX |
352 | |
353 | =back |
354 | |
355 | =head2 B::RV METHODS |
356 | |
357 | =over 4 |
358 | |
359 | =item RV |
360 | |
361 | =back |
362 | |
363 | =head2 B::PV METHODS |
364 | |
365 | =over 4 |
366 | |
367 | =item PV |
368 | |
369 | =back |
370 | |
371 | =head2 B::PVMG METHODS |
372 | |
373 | =over 4 |
374 | |
375 | =item MAGIC |
376 | |
377 | =item SvSTASH |
378 | |
379 | =back |
380 | |
381 | =head2 B::MAGIC METHODS |
382 | |
383 | =over 4 |
384 | |
385 | =item MOREMAGIC |
386 | |
387 | =item PRIVATE |
388 | |
389 | =item TYPE |
390 | |
391 | =item FLAGS |
392 | |
393 | =item OBJ |
394 | |
395 | =item PTR |
396 | |
397 | =back |
398 | |
399 | =head2 B::PVLV METHODS |
400 | |
401 | =over 4 |
402 | |
403 | =item TARGOFF |
404 | |
405 | =item TARGLEN |
406 | |
407 | =item TYPE |
408 | |
409 | =item TARG |
410 | |
411 | =back |
412 | |
413 | =head2 B::BM METHODS |
414 | |
415 | =over 4 |
416 | |
417 | =item USEFUL |
418 | |
419 | =item PREVIOUS |
420 | |
421 | =item RARE |
422 | |
423 | =item TABLE |
424 | |
425 | =back |
426 | |
427 | =head2 B::GV METHODS |
428 | |
429 | =over 4 |
430 | |
431 | =item NAME |
432 | |
433 | =item STASH |
434 | |
435 | =item SV |
436 | |
437 | =item IO |
438 | |
439 | =item FORM |
440 | |
441 | =item AV |
442 | |
443 | =item HV |
444 | |
445 | =item EGV |
446 | |
447 | =item CV |
448 | |
449 | =item CVGEN |
450 | |
451 | =item LINE |
452 | |
453 | =item FILEGV |
454 | |
455 | =item GvREFCNT |
456 | |
457 | =item FLAGS |
458 | |
459 | =back |
460 | |
461 | =head2 B::IO METHODS |
462 | |
463 | =over 4 |
464 | |
465 | =item LINES |
466 | |
467 | =item PAGE |
468 | |
469 | =item PAGE_LEN |
470 | |
471 | =item LINES_LEFT |
472 | |
473 | =item TOP_NAME |
474 | |
475 | =item TOP_GV |
476 | |
477 | =item FMT_NAME |
478 | |
479 | =item FMT_GV |
480 | |
481 | =item BOTTOM_NAME |
482 | |
483 | =item BOTTOM_GV |
484 | |
485 | =item SUBPROCESS |
486 | |
487 | =item IoTYPE |
488 | |
489 | =item IoFLAGS |
490 | |
491 | =back |
492 | |
493 | =head2 B::AV METHODS |
494 | |
495 | =over 4 |
496 | |
497 | =item FILL |
498 | |
499 | =item MAX |
500 | |
501 | =item OFF |
502 | |
503 | =item ARRAY |
504 | |
505 | =item AvFLAGS |
506 | |
507 | =back |
508 | |
509 | =head2 B::CV METHODS |
510 | |
511 | =over 4 |
512 | |
513 | =item STASH |
514 | |
515 | =item START |
516 | |
517 | =item ROOT |
518 | |
519 | =item GV |
520 | |
521 | =item FILEGV |
522 | |
523 | =item DEPTH |
524 | |
525 | =item PADLIST |
526 | |
527 | =item OUTSIDE |
528 | |
529 | =item XSUB |
530 | |
531 | =item XSUBANY |
532 | |
533 | =back |
534 | |
535 | =head2 B::HV METHODS |
536 | |
537 | =over 4 |
538 | |
539 | =item FILL |
540 | |
541 | =item MAX |
542 | |
543 | =item KEYS |
544 | |
545 | =item RITER |
546 | |
547 | =item NAME |
548 | |
549 | =item PMROOT |
550 | |
551 | =item ARRAY |
552 | |
553 | =back |
554 | |
555 | =head2 OP-RELATED CLASSES |
556 | |
557 | B::OP, B::UNOP, B::BINOP, B::LOGOP, B::CONDOP, B::LISTOP, B::PMOP, |
558 | B::SVOP, B::GVOP, B::PVOP, B::CVOP, B::LOOP, B::COP. |
559 | These classes correspond in |
560 | the obvious way to the underlying C structures of similar names. The |
561 | inheritance hierarchy mimics the underlying C "inheritance". Access |
562 | methods correspond to the underlying C structre field names, with the |
563 | leading "class indication" prefix removed (op_). |
564 | |
565 | =head2 B::OP METHODS |
566 | |
567 | =over 4 |
568 | |
569 | =item next |
570 | |
571 | =item sibling |
572 | |
573 | =item ppaddr |
574 | |
575 | This returns the function name as a string (e.g. pp_add, pp_rv2av). |
576 | |
577 | =item desc |
578 | |
579 | This returns the op description from the global C op_desc array |
580 | (e.g. "addition" "array deref"). |
581 | |
582 | =item targ |
583 | |
584 | =item type |
585 | |
586 | =item seq |
587 | |
588 | =item flags |
589 | |
590 | =item private |
591 | |
592 | =back |
593 | |
594 | =head2 B::UNOP METHOD |
595 | |
596 | =over 4 |
597 | |
598 | =item first |
599 | |
600 | =back |
601 | |
602 | =head2 B::BINOP METHOD |
603 | |
604 | =over 4 |
605 | |
606 | =item last |
607 | |
608 | =back |
609 | |
610 | =head2 B::LOGOP METHOD |
611 | |
612 | =over 4 |
613 | |
614 | =item other |
615 | |
616 | =back |
617 | |
618 | =head2 B::CONDOP METHODS |
619 | |
620 | =over 4 |
621 | |
622 | =item true |
623 | |
624 | =item false |
625 | |
626 | =back |
627 | |
628 | =head2 B::LISTOP METHOD |
629 | |
630 | =over 4 |
631 | |
632 | =item children |
633 | |
634 | =back |
635 | |
636 | =head2 B::PMOP METHODS |
637 | |
638 | =over 4 |
639 | |
640 | =item pmreplroot |
641 | |
642 | =item pmreplstart |
643 | |
644 | =item pmnext |
645 | |
646 | =item pmregexp |
647 | |
648 | =item pmflags |
649 | |
650 | =item pmpermflags |
651 | |
652 | =item precomp |
653 | |
654 | =back |
655 | |
656 | =head2 B::SVOP METHOD |
657 | |
658 | =over 4 |
659 | |
660 | =item sv |
661 | |
662 | =back |
663 | |
664 | =head2 B::GVOP METHOD |
665 | |
666 | =over 4 |
667 | |
668 | =item gv |
669 | |
670 | =back |
671 | |
672 | =head2 B::PVOP METHOD |
673 | |
674 | =over 4 |
675 | |
676 | =item pv |
677 | |
678 | =back |
679 | |
680 | =head2 B::LOOP METHODS |
681 | |
682 | =over 4 |
683 | |
684 | =item redoop |
685 | |
686 | =item nextop |
687 | |
688 | =item lastop |
689 | |
690 | =back |
691 | |
692 | =head2 B::COP METHODS |
693 | |
694 | =over 4 |
695 | |
696 | =item label |
697 | |
698 | =item stash |
699 | |
700 | =item filegv |
701 | |
702 | =item cop_seq |
703 | |
704 | =item arybase |
705 | |
706 | =item line |
707 | |
708 | =back |
709 | |
710 | =head1 FUNCTIONS EXPORTED BY C<B> |
711 | |
712 | The C<B> module exports a variety of functions: some are simple |
713 | utility functions, others provide a Perl program with a way to |
714 | get an initial "handle" on an internal object. |
715 | |
716 | =over 4 |
717 | |
718 | =item main_cv |
719 | |
720 | Return the (faked) CV corresponding to the main part of the Perl |
721 | program. |
722 | |
723 | =item main_root |
724 | |
725 | Returns the root op (i.e. an object in the appropriate B::OP-derived |
726 | class) of the main part of the Perl program. |
727 | |
728 | =item main_start |
729 | |
730 | Returns the starting op of the main part of the Perl program. |
731 | |
732 | =item comppadlist |
733 | |
734 | Returns the AV object (i.e. in class B::AV) of the global comppadlist. |
735 | |
736 | =item sv_undef |
737 | |
738 | Returns the SV object corresponding to the C variable C<sv_undef>. |
739 | |
740 | =item sv_yes |
741 | |
742 | Returns the SV object corresponding to the C variable C<sv_yes>. |
743 | |
744 | =item sv_no |
745 | |
746 | Returns the SV object corresponding to the C variable C<sv_no>. |
747 | |
748 | =item walkoptree(OP, METHOD) |
749 | |
750 | Does a tree-walk of the syntax tree based at OP and calls METHOD on |
751 | each op it visits. Each node is visited before its children. If |
752 | C<walkoptree_debug> (q.v.) has been called to turn debugging on then |
753 | the method C<walkoptree_debug> is called on each op before METHOD is |
754 | called. |
755 | |
756 | =item walkoptree_debug(DEBUG) |
757 | |
758 | Returns the current debugging flag for C<walkoptree>. If the optional |
759 | DEBUG argument is non-zero, it sets the debugging flag to that. See |
760 | the description of C<walkoptree> above for what the debugging flag |
761 | does. |
762 | |
763 | =item walksymtable(SYMREF, METHOD, RECURSE) |
764 | |
765 | Walk the symbol table starting at SYMREF and call METHOD on each |
766 | symbol visited. When the walk reached package symbols "Foo::" it |
767 | invokes RECURSE and only recurses into the package if that sub |
768 | returns true. |
769 | |
770 | =item svref_2object(SV) |
771 | |
772 | Takes any Perl variable and turns it into an object in the |
773 | appropriate B::OP-derived or B::SV-derived class. Apart from functions |
774 | such as C<main_root>, this is the primary way to get an initial |
775 | "handle" on a internal perl data structure which can then be followed |
776 | with the other access methods. |
777 | |
778 | =item ppname(OPNUM) |
779 | |
780 | Return the PP function name (e.g. "pp_add") of op number OPNUM. |
781 | |
782 | =item hash(STR) |
783 | |
784 | Returns a string in the form "0x..." representing the value of the |
785 | internal hash function used by perl on string STR. |
786 | |
787 | =item cast_I32(I) |
788 | |
789 | Casts I to the internal I32 type used by that perl. |
790 | |
791 | |
792 | =item minus_c |
793 | |
794 | Does the equivalent of the C<-c> command-line option. Obviously, this |
795 | is only useful in a BEGIN block or else the flag is set too late. |
796 | |
797 | |
798 | =item cstring(STR) |
799 | |
800 | Returns a double-quote-surrounded escaped version of STR which can |
801 | be used as a string in C source code. |
802 | |
803 | =item class(OBJ) |
804 | |
805 | Returns the class of an object without the part of the classname |
806 | preceding the first "::". This is used to turn "B::UNOP" into |
807 | "UNOP" for example. |
808 | |
809 | =item threadsv_names |
810 | |
811 | In a perl compiled for threads, this returns a list of the special |
812 | per-thread threadsv variables. |
813 | |
814 | =item byteload_fh(FILEHANDLE) |
815 | |
816 | Load the contents of FILEHANDLE as bytecode. See documentation for |
817 | the B<Bytecode> module in F<B::Backend> for how to generate bytecode. |
818 | |
819 | =back |
7f20e9dd |
820 | |
821 | =head1 AUTHOR |
822 | |
823 | Malcolm Beattie, C<mbeattie@sable.ox.ac.uk> |
824 | |
825 | =cut |