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Comparing Faster/Faster.pm (file contents):
Revision 1.12 by root, Fri Mar 10 18:39:26 2006 UTC vs.
Revision 1.25 by root, Sat Mar 11 04:58:53 2006 UTC

… …
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use Faster; 7 use Faster;
8 8
9 perl -MFaster ...
10
9=head1 DESCRIPTION 11=head1 DESCRIPTION
10 12
13This module implements a very simple-minded JIT. It works by more or less
14translating every function it sees into a C program, compiling it and then
15replacing the function by the compiled code.
16
17As a result, startup times are immense, as every function might lead to a
18full-blown compilation.
19
20The speed improvements are also not great, you can expect 20% or so on
21average, for code that runs very often.
22
23Faster is in the early stages of development. Due to its design its
24relatively safe to use (it will either work or simply slowdown the program
25immensely, but rarely cause bugs).
26
27Usage is very easy, just C<use Faster> and every function called from then
28on will be compiled.
29
30Right now, Faster will leave lots of F<*.c>, F<*.o> and F<*.so> files in
31F</tmp>, and it will even create those temporary files in an insecure
32manner, so watch out.
33
11=over 4 34=over 4
12 35
13=cut 36=cut
14 37
15package Faster; 38package Faster;
39
40no warnings;
16 41
17use strict; 42use strict;
18use Config; 43use Config;
19use B (); 44use B ();
20use Digest::MD5 (); 45#use Digest::MD5 ();
21use DynaLoader (); 46use DynaLoader ();
47use File::Temp ();
22 48
23BEGIN { 49BEGIN {
24 our $VERSION = '0.01'; 50 our $VERSION = '0.01';
25 51
26 require XSLoader; 52 require XSLoader;
… …
31my $LINK = "$Config{ld} $Config{ldflags} $Config{lddlflags} $Config{ccdlflags}"; 57my $LINK = "$Config{ld} $Config{ldflags} $Config{lddlflags} $Config{ccdlflags}";
32my $LIBS = "$Config{libs}"; 58my $LIBS = "$Config{libs}";
33my $_o = $Config{_o}; 59my $_o = $Config{_o};
34my $_so = ".so"; 60my $_so = ".so";
35 61
36my $opt_assert = 1; 62# we don't need no steenking PIC on x86
63$COMPILE =~ s/-f(?:PIC|pic)//g
64 if $Config{archname} =~ /^(i[3456]86)-/;
65
66my $opt_assert = $ENV{FASTER_DEBUG};
67my $verbose = $ENV{FASTER_VERBOSE}+0;
37 68
38our $source; 69our $source;
39 70
40my @ops; 71our @ops;
41my $op; 72our $insn;
73our $op;
42my $op_name; 74our $op_name;
43my @loop; 75our @op_loop;
76our %op_regcomp;
44 77
45my %flag; 78# ops that cause immediate return to the interpreter
79my %f_unsafe = map +($_ => undef), qw(
80 leavesub leavesublv return
81 goto last redo next
82 eval flip leaveeval entertry
83 formline grepstart mapstart
84 substcont entereval require
85);
46 86
47# complex flag steting is no longer required, rewrite this ugly code 87# ops with known stack extend behaviour
48for (split /\n/, <<EOF) { 88# the values given are maximum values
49 leavesub unsafe 89my %extend = (
50 leavesublv unsafe 90 pushmark => 0,
51 return unsafe 91 nextstate => 0, # might reduce the stack
52 flip unsafe 92 unstack => 0,
53 goto unsafe 93 enter => 0,
54 last unsafe
55 redo unsafe
56 next unsafe
57 eval unsafe
58 leaveeval unsafe
59 entertry unsafe
60 formline unsafe
61 grepstart unsafe
62 mapstart unsafe
63 substcont unsafe
64 entereval unsafe noasync todo
65 require unsafe
66 94
67 mapstart noasync 95 stringify => 0,
68 grepstart noasync 96 not => 0,
69 match noasync 97 and => 0,
98 or => 0,
99 gvsv => 0,
100 rv2gv => 0,
101 preinc => 0,
102 predec => 0,
103 postinc => 0,
104 postdec => 0,
105 aelem => 0,
106 helem => 0,
107 qr => 1, #???
108 pushre => 1,
109 gv => 1,
110 aelemfast => 1,
111 aelem => 0,
112 padsv => 1,
113 const => 1,
114 pop => 1,
115 shift => 1,
116 eq => -1,
117 ne => -1,
118 gt => -1,
119 lt => -1,
120 ge => -1,
121 lt => -1,
122 cond_expr => -1,
123 add => -1,
124 subtract => -1,
125 multiply => -1,
126 divide => -1,
127 aassign => 0,
128 sassign => -2,
129 method => 0,
130 method_named => 1,
131);
70 132
71 last noasync 133# ops that do not need an ASYNC_CHECK
72 next noasync 134my %f_noasync = map +($_ => undef), qw(
73 redo noasync 135 mapstart grepstart match entereval
74 seq noasync 136 enteriter entersub leaveloop
75 pushmark noasync extend=0
76 padsv noasync extend=1
77 padav noasync extend=1
78 padhv noasync extend=1
79 padany noasync extend=1
80 entersub noasync
81 aassign noasync
82 sassign noasync
83 rv2av noasync
84 rv2cv noasync
85 rv2gv noasync
86 rv2hv noasync
87 refgen noasync
88 nextstate noasync
89 gv noasync
90 gvsv noasync
91 add noasync
92 subtract noasync
93 multiply noasync
94 divide noasync
95 complement noasync
96 cond_expr noasync
97 and noasync
98 or noasync
99 not noasync
100 defined noasync
101 method_named noasync
102 preinc noasync
103 postinc noasync
104 predec noasync
105 postdec noasync
106 stub noasync
107 unstack noasync
108 leaveloop noasync
109 aelem noasync
110 aelemfast noasync
111 helem noasync
112 pushre noasync
113 subst noasync
114 const noasync extend=1
115 list noasync
116 join noasync
117 split noasync
118 concat noasync
119 push noasync
120 pop noasync
121 shift noasync
122 unshift noasync
123 length noasync
124 substr noasync
125 stringify noasync
126 eq noasync
127 ne noasync
128 gt noasync
129 lt noasync
130 ge noasync
131 le noasync
132 enteriter noasync
133 ord noasync
134 137
135 iter async 138 pushmark nextstate
136EOF
137 my (undef, $op, @flags) = split /\s+/;
138 139
139 undef $flag{$_}{$op} 140 const stub unstack
140 for ("known", @flags); 141 last next redo seq
141} 142 padsv padav padhv padany
143 aassign sassign orassign
144 rv2av rv2cv rv2gv rv2hv refgen
145 gv gvsv
146 add subtract multiply divide
147 complement cond_expr and or not
148 defined
149 method method_named bless
150 preinc postinc predec postdec
151 aelem aelemfast helem delete exists
152 pushre subst list join split concat
153 length substr stringify ord
154 push pop shift unshift
155 eq ne gt lt ge le
156 regcomp regcreset regcmaybe
157);
142 158
143my %callop = ( 159my %callop = (
144 entersub => "(PL_ppaddr [OP_ENTERSUB]) (aTHX)", 160 entersub => "(PL_ppaddr [OP_ENTERSUB]) (aTHX)",
145 mapstart => "Perl_pp_grepstart (aTHX)", 161 mapstart => "Perl_pp_grepstart (aTHX)",
146); 162);
… …
157sub out_callop { 173sub out_callop {
158 assert "nextop == (OP *)$$op"; 174 assert "nextop == (OP *)$$op";
159 $source .= " PL_op = nextop; nextop = " . (callop $op) . ";\n"; 175 $source .= " PL_op = nextop; nextop = " . (callop $op) . ";\n";
160} 176}
161 177
178sub out_cond_jump {
179 $source .= " if (nextop == (OP *)${$_[0]}L) goto op_${$_[0]};\n";
180}
181
162sub out_jump_next { 182sub out_jump_next {
183 out_cond_jump $op_regcomp{$$op}
184 if $op_regcomp{$$op};
185
163 assert "nextop == (OP *)${$op->next}"; 186 assert "nextop == (OP *)${$op->next}";
164 $source .= " goto op_${$op->next};\n"; 187 $source .= " goto op_${$op->next};\n";
165} 188}
166 189
167sub out_next { 190sub out_next {
… …
171} 194}
172 195
173sub out_linear { 196sub out_linear {
174 out_callop; 197 out_callop;
175 out_jump_next; 198 out_jump_next;
176}
177
178sub out_cond_jump {
179 $source .= " if (nextop == (OP *)${$_[0]}L) goto op_${$_[0]};\n";
180} 199}
181 200
182sub op_entersub { 201sub op_entersub {
183 out_callop; 202 out_callop;
184 $source .= " RUNOPS_TILL ((OP *)${$op->next}L);\n"; 203 $source .= " RUNOPS_TILL ((OP *)${$op->next}L);\n";
… …
199 $source .= " PUSHMARK (PL_stack_sp);\n"; 218 $source .= " PUSHMARK (PL_stack_sp);\n";
200 219
201 out_next; 220 out_next;
202} 221}
203 222
204if (0 && $Config{useithreads} ne "define") { 223if ($Config{useithreads} ne "define") {
205 # disable optimisations on ithreads 224 # disable optimisations on ithreads
206 225
207 *op_const = sub { 226 *op_const = sub {
208 $source .= " { dSP; XPUSHs ((SV *)${$op->sv}L); PUTBACK; }\n"; 227 $source .= " { dSP; PUSHs ((SV *)${$op->sv}L); PUTBACK; }\n";
209 228
210 out_next; 229 out_next;
211 }; 230 };
212 231
213 *op_gv = \&op_const; 232 *op_gv = \&op_const;
… …
233 if (!($op->flags & B::OPf_MOD)) { 252 if (!($op->flags & B::OPf_MOD)) {
234 $source .= " if (SvGMAGICAL (sv)) sv = sv_mortalcopy (sv);\n"; 253 $source .= " if (SvGMAGICAL (sv)) sv = sv_mortalcopy (sv);\n";
235 } 254 }
236 255
237 $source .= " dSP;\n"; 256 $source .= " dSP;\n";
238 $source .= " XPUSHs (sv);\n"; 257 $source .= " PUSHs (sv);\n";
239 $source .= " PUTBACK;\n"; 258 $source .= " PUTBACK;\n";
240 $source .= " }\n"; 259 $source .= " }\n";
241 260
242 out_next; 261 out_next;
243 }; 262 };
244 263
245 *op_gvsv = sub { 264 *op_gvsv = sub {
246 $source .= " {\n"; 265 $source .= " {\n";
247 $source .= " dSP;\n"; 266 $source .= " dSP;\n";
248 $source .= " EXTEND (SP, 1);\n";
249 267
250 if ($op->private & B::OPpLVAL_INTRO) { 268 if ($op->private & B::OPpLVAL_INTRO) {
251 $source .= " PUSHs (save_scalar ((GV *)${$op->sv}L));\n"; 269 $source .= " PUSHs (save_scalar ((GV *)${$op->sv}L));\n";
252 } else { 270 } else {
253 $source .= " PUSHs (GvSV ((GV *)${$op->sv}L));\n"; 271 $source .= " PUSHs (GvSV ((GV *)${$op->sv}L));\n";
… …
313 out_next; 331 out_next;
314} 332}
315 333
316sub op_padsv { 334sub op_padsv {
317 my $flags = $op->flags; 335 my $flags = $op->flags;
318 my $target = $op->targ; 336 my $padofs = "(PADOFFSET)" . $op->targ;
337
338 #d#TODO: why does our version break
339 # breaks gce with can't coerce array....
340 if (($flags & B::OPf_MOD) && ($op->private & B::OPpDEREF)) {#d#
341 return out_linear;#d#
342 }#d#
319 343
320 $source .= <<EOF; 344 $source .= <<EOF;
321 { 345 {
322 dSP; 346 dSP;
323 XPUSHs (PAD_SV ((PADOFFSET)$target)); 347 SV *sv = PAD_SVl ($padofs);
348EOF
349
350 if (($flags & B::OPf_MOD) && ($op->private & B::OPpLVAL_INTRO)) {
351 $source .= " SAVECLEARSV (PAD_SVl ($padofs));\n";
352 $ops[0]{pre_padsv_lval_intro}++ if @ops;#d#
353 }
354
355 $source .= <<EOF;
356 PUSHs (sv);
324 PUTBACK; 357 PUTBACK;
325EOF 358EOF
326 if ($op->flags & B::OPf_MOD) { 359
327 if ($op->private & B::OPpLVAL_INTRO) { 360 if (($flags & B::OPf_MOD) && ($op->private & B::OPpDEREF)) {
328 $source .= " SAVECLEARSV (PAD_SVl ((PADOFFSET)$target));\n"; 361 $source .= " vivify_ref (sv, $flags & OPpDEREF);\n";
329 } elsif ($op->private & B::OPpDEREF) {
330 my $deref = $op->private & B::OPpDEREF;
331 $source .= " Perl_vivify_ref (PAD_SVl ((PADOFFSET)$target), $deref);\n";
332 }
333 } 362 }
363 $source .= " }\n";
364
365 out_next;
366}
367
368sub op_sassign {
369 $source .= <<EOF;
370 {
371 dSP;
372 dPOPTOPssrl;
373EOF
374 $source .= " SV *temp = left; left = right; right = temp;\n"
375 if $op->private & B::OPpASSIGN_BACKWARDS;
376
377 if ($insn->{pre_padsv_lval_intro} && !($op->private & B::OPpASSIGN_BACKWARDS)) {
378 # simple assignment - the target exists, but is basically undef
379 $source .= " SvSetSV (right, left);\n";
380 } else {
381 $source .= " SvSetMagicSV (right, left);\n";
382 }
383
334 $source .= <<EOF; 384 $source .= <<EOF;
385 SETs (right);
386 PUTBACK;
335 } 387 }
336EOF 388EOF
337 389
338 out_next; 390 out_next;
339} 391}
340 392
341# pattern const+ (or general push1) 393# pattern const+ (or general push1)
342# pattern pushmark return(?) 394# pattern pushmark return(?)
343# pattern pushmark gv rv2av pushmark padsv+o.ä. aassign 395# pattern pushmark gv rv2av pushmark padsv+o.ä. aassign
… …
359 411
360 /* simple "polymorphic" inline cache */ 412 /* simple "polymorphic" inline cache */
361 if (stash == last_stash 413 if (stash == last_stash
362 && PL_sub_generation == last_sub_generation) 414 && PL_sub_generation == last_sub_generation)
363 { 415 {
364 XPUSHs (last_cv); 416 PUSHs (last_cv);
365 PUTBACK; 417 PUTBACK;
366 } 418 }
367 else 419 else
368 { 420 {
369 PL_op = nextop; nextop = Perl_pp_method_named (aTHX); 421 PL_op = nextop; nextop = Perl_pp_method_named (aTHX);
… …
385 out_next; 437 out_next;
386} 438}
387 439
388sub op_grepstart { 440sub op_grepstart {
389 out_callop; 441 out_callop;
442 $op = $op->next;
390 out_cond_jump $op->next->other; 443 out_cond_jump $op->other;
391 out_jump_next; 444 out_jump_next;
392} 445}
393 446
394*op_mapstart = \&op_grepstart; 447*op_mapstart = \&op_grepstart;
395 448
… …
404 my ($idx) = @_; 457 my ($idx) = @_;
405 458
406 out_callop; 459 out_callop;
407 460
408 out_cond_jump $_->[$idx] 461 out_cond_jump $_->[$idx]
409 for reverse @loop; 462 for reverse @op_loop;
410 463
411 $source .= " return nextop;\n"; 464 $source .= " return nextop;\n";
412} 465}
413 466
414sub xop_next { 467sub xop_next {
… …
424} 477}
425 478
426sub cv2c { 479sub cv2c {
427 my ($cv) = @_; 480 my ($cv) = @_;
428 481
429 @loop = (); 482 local @ops;
483 local @op_loop;
484 local %op_regcomp;
430 485
431 my %opsseen; 486 my %opsseen;
432 my @todo = $cv->START; 487 my @todo = $cv->START;
488 my %op_target;
433 489
434 while (my $op = shift @todo) { 490 while (my $op = shift @todo) {
435 for (; $$op; $op = $op->next) { 491 for (; $$op; $op = $op->next) {
436 last if $opsseen{$$op}++; 492 last if $opsseen{$$op}++;
437 push @ops, $op;
438 493
439 my $name = $op->name; 494 my $name = $op->name;
440 my $class = B::class $op; 495 my $class = B::class $op;
441 496
497 my $insn = { op => $op };
498
499 push @ops, $insn;
500
501 if (exists $extend{$name}) {
502 my $extend = $extend{$name};
503 $extend = $extend->($op) if ref $extend;
504 $insn->{extend} = $extend if defined $extend;
505 }
506
507 push @todo, $op->next;
508
442 if ($class eq "LOGOP") { 509 if ($class eq "LOGOP") {
443 unshift @todo, $op->other; # unshift vs. push saves jumps 510 push @todo, $op->other;
511 $op_target{${$op->other}}++;
512
513 # regcomp/o patches ops at runtime, lets expect that
514 if ($name eq "regcomp" && $op->other->pmflags & B::PMf_KEEP) {
515 $op_target{${$op->first}}++;
516 $op_regcomp{${$op->first}} = $op->next;
517 }
518
444 } elsif ($class eq "PMOP") { 519 } elsif ($class eq "PMOP") {
520 if (${$op->pmreplstart}) {
445 unshift @todo, $op->pmreplstart if ${$op->pmreplstart}; 521 unshift @todo, $op->pmreplstart;
522 $op_target{${$op->pmreplstart}}++;
523 }
524
446 } elsif ($class eq "LOOP") { 525 } elsif ($class eq "LOOP") {
447 push @loop, [$op->nextop, $op->lastop->next, $op->redoop->next]; 526 my @targ = ($op->nextop, $op->lastop->next, $op->redoop->next);
527
528 push @op_loop, \@targ;
529 push @todo, @targ;
530
531 $op_target{$$_}++ for @targ;
532 } elsif ($class eq "COP") {
533 $insn->{bblock}++ if defined $op->label;
448 } 534 }
449 } 535 }
450 } 536 }
537
538 $_->{bblock}++ for grep $op_target{${$_->{op}}}, @ops;
451 539
452 local $source = <<EOF; 540 local $source = <<EOF;
453OP *%%%FUNC%%% (pTHX) 541OP *%%%FUNC%%% (pTHX)
454{ 542{
455 register OP *nextop = (OP *)${$ops[0]}L; 543 register OP *nextop = (OP *)${$ops[0]->{op}}L;
456EOF 544EOF
457 545
458 while (@ops) { 546 while (@ops) {
459 $op = shift @ops; 547 $insn = shift @ops;
548
549 $op = $insn->{op};
460 $op_name = $op->name; 550 $op_name = $op->name;
461 551
552 my $class = B::class $op;
553
554 $source .= "\n/* start basic block */\n" if exists $insn->{bblock};#d#
462 $source .= "op_$$op: /* $op_name */\n"; 555 $source .= "op_$$op: /* $op_name */\n";
463 #$source .= "fprintf (stderr, \"$$op in op $op_name\\n\");\n";#d# 556 #$source .= "fprintf (stderr, \"$$op in op $op_name\\n\");\n";#d#
464 #$source .= "{ dSP; sv_dump (TOPs); }\n";#d# 557 #$source .= "{ dSP; sv_dump (TOPs); }\n";#d#
465 558
466 $source .= " PERL_ASYNC_CHECK ();\n" 559 $source .= " PERL_ASYNC_CHECK ();\n"
467 unless exists $flag{noasync}{$op_name}; 560 unless exists $f_noasync{$op_name};
468 561
469 if (my $can = __PACKAGE__->can ("op_$op_name")) { 562 if (my $can = __PACKAGE__->can ("op_$op_name")) {
470 # handcrafted replacement 563 # handcrafted replacement
564
565 if ($insn->{extend} > 0) {
566 # coalesce EXTENDs
567 # TODO: properly take negative preceeding and following EXTENDs into account
568 for my $i (@ops) {
569 last if exists $i->{bblock};
570 last unless exists $i->{extend};
571 my $extend = delete $i->{extend};
572 $insn->{extend} += $extend if $extend > 0;
573 }
574
575 $source .= " { dSP; EXTEND (SP, $insn->{extend}); PUTBACK; }\n"
576 if $insn->{extend} > 0;
577 }
578
471 $can->($op); 579 $can->($op);
472 580
473 } elsif (exists $flag{unsafe}{$op_name}) { 581 } elsif (exists $f_unsafe{$op_name}) {
474 # unsafe, return to interpreter 582 # unsafe, return to interpreter
475 assert "nextop == (OP *)$$op"; 583 assert "nextop == (OP *)$$op";
476 $source .= " return nextop;\n"; 584 $source .= " return nextop;\n";
477 585
478 } elsif ("LOGOP" eq B::class $op) { 586 } elsif ("LOGOP" eq $class) {
479 # logical operation with optionaö branch 587 # logical operation with optional branch
480 out_callop; 588 out_callop;
481 out_cond_jump $op->other; 589 out_cond_jump $op->other;
482 out_jump_next; 590 out_jump_next;
483 591
484 } elsif ("PMOP" eq B::class $op) { 592 } elsif ("PMOP" eq $class) {
485 # regex-thingy 593 # regex-thingy
486 out_callop; 594 out_callop;
487 out_cond_jump $op->pmreplroot if ${$op->pmreplroot}; 595 out_cond_jump $op->pmreplroot if $op_name ne "pushre" && ${$op->pmreplroot};
488 out_jump_next; 596 out_jump_next;
489 597
490 } else { 598 } else {
491 # normal operator, linear execution 599 # normal operator, linear execution
492 out_linear; 600 out_linear;
… …
503 #warn $source; 611 #warn $source;
504 612
505 $source 613 $source
506} 614}
507 615
616my $uid = "aaaaaaa0";
617
508sub source2ptr { 618sub source2ptr {
509 my ($source) = @_; 619 my (@source) = @_;
510 620
511 my $md5 = Digest::MD5::md5_hex $source; 621 my $stem = "/tmp/Faster-$$-" . $uid++;
512 $source =~ s/%%%FUNC%%%/Faster_$md5/;
513 622
514 my $stem = "/tmp/$md5";
515
516 unless (-e "$stem$_so") {
517 open FILE, ">:raw", "$stem.c"; 623 open FILE, ">:raw", "$stem.c";
518 print FILE <<EOF; 624 print FILE <<EOF;
519#define PERL_NO_GET_CONTEXT 625#define PERL_NO_GET_CONTEXT
626#define PERL_CORE
520 627
521#include <assert.h> 628#include <assert.h>
522 629
523#include "EXTERN.h" 630#include "EXTERN.h"
524#include "perl.h" 631#include "perl.h"
525#include "XSUB.h" 632#include "XSUB.h"
526 633
527#define RUNOPS_TILL(op) \\ 634#define RUNOPS_TILL(op) \\
528 while (nextop != (op)) \\ 635while (nextop != (op)) \\
529 { \\ 636 { \\
530 PERL_ASYNC_CHECK (); \\ 637 PERL_ASYNC_CHECK (); \\
531 PL_op = nextop; nextop = (PL_op->op_ppaddr)(aTHX); \\ 638 PL_op = nextop; nextop = (PL_op->op_ppaddr)(aTHX); \\
532 } 639 }
533 640
534EOF 641EOF
642 for (@source) {
643 my $func = $uid++;
644 $_ =~ s/%%%FUNC%%%/$func/g;
535 print FILE $source; 645 print FILE $_;
536 close FILE; 646 $_ = $func;
537 system "$COMPILE -o $stem$_o $stem.c";
538 system "$LINK -o $stem$_so $stem$_o $LIBS";
539 } 647 }
540 648
541# warn $source; 649 close FILE;
650 system "$COMPILE -o $stem$_o $stem.c";
651 #d#unlink "$stem.c";
652 system "$LINK -o $stem$_so $stem$_o $LIBS";
653 unlink "$stem$_o";
654
542 my $so = DynaLoader::dl_load_file "$stem$_so" 655 my $so = DynaLoader::dl_load_file "$stem$_so"
543 or die "$stem$_so: $!"; 656 or die "$stem$_so: $!";
544 657
545 DynaLoader::dl_find_symbol $so, "Faster_$md5" 658 #unlink "$stem$_so";
546 or die "Faster_$md5: $!" 659
660 map +(DynaLoader::dl_find_symbol $so, $_), @source
547} 661}
662
663my %ignore;
548 664
549sub entersub { 665sub entersub {
550 my ($cv) = @_; 666 my ($cv) = @_;
551 667
552 # always compile the whole stash 668 my $pkg = $cv->STASH->NAME;
553# my @stash = $cv->STASH->ARRAY; 669
554# warn join ":", @stash; 670 return if $ignore{$pkg};
555# exit; 671
672 warn "compiling ", $cv->STASH->NAME, "\n"
673 if $verbose;
556 674
557 eval { 675 eval {
558 my $source = cv2c $cv; 676 my @cv;
677 my @cv_source;
559 678
679 # always compile the whole stash
680 my %stash = $cv->STASH->ARRAY;
681 while (my ($k, $v) = each %stash) {
682 $v->isa (B::GV::)
683 or next;
684
685 my $cv = $v->CV;
686
687 if ($cv->isa (B::CV::)
688 && ${$cv->START}
689 && $cv->START->name ne "null") {
690 push @cv, $cv;
691 push @cv_source, cv2c $cv;
692 }
693 }
694
560 my $ptr = source2ptr $source; 695 my @ptr = source2ptr @cv_source;
561 696
697 for (0 .. $#cv) {
562 patch_cv $cv, $ptr; 698 patch_cv $cv[$_], $ptr[$_];
699 }
563 }; 700 };
564 701
565 warn $@ if $@; 702 if ($@) {
703 $ignore{$pkg}++;
704 warn $@;
705 }
566} 706}
567 707
568hook_entersub; 708hook_entersub;
569 709
5701; 7101;
711
712=back
713
714=head1 ENVIRONMENT VARIABLES
715
716The following environment variables influence the behaviour of Faster:
717
718=over 4
719
720=item FASTER_VERBOSE
721
722Faster will output more informational messages when set to values higher
723than C<0>. Currently, C<1> outputs which packages are being compiled.
724
725=item FASTER_DEBUG
726
727Add debugging code when set to values higher than C<0>. Currently, this
728adds 1-3 C<assert>'s per perl op, to ensure that opcode order and C
729execution order are compatible.
730
731=item FASTER_CACHE
732
733NOT YET IMPLEMENTED
734
735Set a persistent cache directory that caches compiled code
736fragments. Normally, code compiled by Faster will be deleted immediately,
737and every restart will recompile everything. Setting this variable to a
738directory makes Faster cache the generated files for re-use.
739
740This directory will always grow in contents, so you might need to erase it
741from time to time.
571 742
572=back 743=back
573 744
574=head1 BUGS/LIMITATIONS 745=head1 BUGS/LIMITATIONS
575 746
576Perl will check much less often for asynchronous signals in 747Perl will check much less often for asynchronous signals in
577Faster-compiled code. It tries to check on every function call, loop 748Faster-compiled code. It tries to check on every function call, loop
578iteration and every I/O operator, though. 749iteration and every I/O operator, though.
579 750
580The following things will disable Faster. If you manage to enable them at 751The following things will disable Faster. If you manage to enable them at
581runtime, bad things will happen. 752runtime, bad things will happen. Enabling them at startup will be fine,
753though.
582 754
583 enabled tainting 755 enabled tainting
584 enabled debugging 756 enabled debugging
585 757
586This will dramatically reduce Faster's performance: 758Thread-enabled builds of perl will dramatically reduce Faster's
759performance, but you don't care about speed if you enable threads anyway.
587 760
588 threads (but you don't care about speed if you use threads anyway)
589
590These constructs will force the use of the interpreter as soon as they are 761These constructs will force the use of the interpreter for the currently
591being executed, for the rest of the currently executed: 762executed function as soon as they are being encountered during execution.
592 763
593 .., ... (flipflop operators)
594 goto 764 goto
595 next, redo (but not well-behaved last's) 765 next, redo (but not well-behaved last's)
596 eval 766 eval
597 require 767 require
598 any use of formats 768 any use of formats
769 .., ... (flipflop operators)
599 770
600=head1 AUTHOR 771=head1 AUTHOR
601 772
602 Marc Lehmann <schmorp@schmorp.de> 773 Marc Lehmann <schmorp@schmorp.de>
603 http://home.schmorp.de/ 774 http://home.schmorp.de/

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