1 |
=head1 NAME |
2 |
|
3 |
Faster - do some things faster |
4 |
|
5 |
=head1 SYNOPSIS |
6 |
|
7 |
use Faster; |
8 |
|
9 |
=head1 DESCRIPTION |
10 |
|
11 |
=over 4 |
12 |
|
13 |
=cut |
14 |
|
15 |
package Faster; |
16 |
|
17 |
use strict; |
18 |
use Config; |
19 |
use B (); |
20 |
use Digest::MD5 (); |
21 |
use DynaLoader (); |
22 |
|
23 |
BEGIN { |
24 |
our $VERSION = '0.01'; |
25 |
|
26 |
require XSLoader; |
27 |
XSLoader::load __PACKAGE__, $VERSION; |
28 |
} |
29 |
|
30 |
my $COMPILE = "$Config{cc} -c -I$Config{archlibexp}/CORE $Config{optimize} $Config{ccflags} $Config{cccdlflags}"; |
31 |
my $LINK = "$Config{ld} $Config{ldflags} $Config{lddlflags} $Config{ccdlflags}"; |
32 |
my $LIBS = "$Config{libs}"; |
33 |
my $_o = $Config{_o}; |
34 |
my $_so = ".so"; |
35 |
|
36 |
my $opt_assert = 1; |
37 |
|
38 |
our $source; |
39 |
|
40 |
my @ops; |
41 |
my $op; |
42 |
my $op_name; |
43 |
my @loop; |
44 |
|
45 |
my %flag; |
46 |
|
47 |
# complex flag steting is no longer required, rewrite this ugly code |
48 |
for (split /\n/, <<EOF) { |
49 |
leavesub unsafe |
50 |
leavesublv unsafe |
51 |
return unsafe |
52 |
flip unsafe |
53 |
goto unsafe |
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 |
|
67 |
mapstart noasync |
68 |
grepstart noasync |
69 |
match noasync todo#whyisitunsafe? unsafe |
70 |
|
71 |
last noasync |
72 |
next noasync |
73 |
redo noasync |
74 |
seq noasync |
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 |
|
135 |
iter async |
136 |
EOF |
137 |
my (undef, $op, @flags) = split /\s+/; |
138 |
|
139 |
undef $flag{$_}{$op} |
140 |
for ("known", @flags); |
141 |
} |
142 |
|
143 |
my %callop = ( |
144 |
entersub => "(PL_ppaddr [OP_ENTERSUB]) (aTHX)", |
145 |
mapstart => "Perl_pp_grepstart (aTHX)", |
146 |
); |
147 |
|
148 |
sub callop { |
149 |
$callop{$op_name} || "Perl_pp_$op_name (aTHX)" |
150 |
} |
151 |
|
152 |
sub assert { |
153 |
return unless $opt_assert; |
154 |
$source .= " assert ((\"$op_name\", ($_[0])));\n"; |
155 |
} |
156 |
|
157 |
sub out_callop { |
158 |
assert "nextop == (OP *)$$op"; |
159 |
$source .= " PL_op = nextop; nextop = " . (callop $op) . ";\n"; |
160 |
} |
161 |
|
162 |
sub out_jump_next { |
163 |
assert "nextop == (OP *)${$op->next}"; |
164 |
$source .= " goto op_${$op->next};\n"; |
165 |
} |
166 |
|
167 |
sub out_next { |
168 |
$source .= " nextop = (OP *)${$op->next}L;\n"; |
169 |
|
170 |
out_jump_next; |
171 |
} |
172 |
|
173 |
sub out_linear { |
174 |
out_callop; |
175 |
out_jump_next; |
176 |
} |
177 |
|
178 |
sub out_cond_jump { |
179 |
$source .= " if (nextop == (OP *)${$_[0]}L) goto op_${$_[0]};\n"; |
180 |
} |
181 |
|
182 |
sub op_entersub { |
183 |
out_callop; |
184 |
$source .= " RUNOPS_TILL ((OP *)${$op->next}L);\n"; |
185 |
out_jump_next; |
186 |
} |
187 |
|
188 |
*op_require = \&op_entersub; |
189 |
|
190 |
sub op_nextstate { |
191 |
$source .= " PL_curcop = (COP *)nextop;\n"; |
192 |
$source .= " PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;\n"; |
193 |
$source .= " FREETMPS;\n"; |
194 |
|
195 |
out_next; |
196 |
} |
197 |
|
198 |
sub op_pushmark { |
199 |
$source .= " PUSHMARK (PL_stack_sp);\n"; |
200 |
|
201 |
out_next; |
202 |
} |
203 |
|
204 |
if (0 && $Config{useithreads} ne "define") { |
205 |
# disable optimisations on ithreads |
206 |
|
207 |
*op_const = sub { |
208 |
$source .= " { dSP; XPUSHs ((SV *)${$op->sv}L); PUTBACK; }\n"; |
209 |
|
210 |
out_next; |
211 |
}; |
212 |
|
213 |
*op_gv = \&op_const; |
214 |
|
215 |
*op_aelemfast = sub { |
216 |
my $targ = $op->targ; |
217 |
my $private = $op->private; |
218 |
|
219 |
$source .= " {\n"; |
220 |
|
221 |
if ($op->flags & B::OPf_SPECIAL) { |
222 |
$source .= " AV *av = (AV*)PAD_SV((PADOFFSET)$targ);\n"; |
223 |
} else { |
224 |
$source .= " AV *av = GvAV ((GV *)${$op->sv}L);\n"; |
225 |
} |
226 |
|
227 |
if ($op->flags & B::OPf_MOD) { |
228 |
$source .= " SV *sv = *av_fetch (av, $private, 1);\n"; |
229 |
} else { |
230 |
$source .= " SV **svp = av_fetch (av, $private, 0); SV *sv = svp ? *svp : &PL_sv_undef;\n"; |
231 |
} |
232 |
|
233 |
if (!($op->flags & B::OPf_MOD)) { |
234 |
$source .= " if (SvGMAGICAL (sv)) sv = sv_mortalcopy (sv);\n"; |
235 |
} |
236 |
|
237 |
$source .= " dSP;\n"; |
238 |
$source .= " XPUSHs (sv);\n"; |
239 |
$source .= " PUTBACK;\n"; |
240 |
$source .= " }\n"; |
241 |
|
242 |
out_next; |
243 |
}; |
244 |
|
245 |
*op_gvsv = sub { |
246 |
$source .= " {\n"; |
247 |
$source .= " dSP;\n"; |
248 |
$source .= " EXTEND (SP, 1);\n"; |
249 |
|
250 |
if ($op->private & B::OPpLVAL_INTRO) { |
251 |
$source .= " PUSHs (save_scalar ((GV *)${$op->sv}L));\n"; |
252 |
} else { |
253 |
$source .= " PUSHs (GvSV ((GV *)${$op->sv}L));\n"; |
254 |
} |
255 |
|
256 |
$source .= " PUTBACK;\n"; |
257 |
$source .= " }\n"; |
258 |
|
259 |
out_next; |
260 |
}; |
261 |
} |
262 |
|
263 |
sub xop_stringify { |
264 |
$source .= " { dSP; dTARGET; sv_copypv (TARG, TOPs); SETTARG; PUTBACK; }\n"; |
265 |
|
266 |
out_next; |
267 |
} |
268 |
|
269 |
sub op_and { |
270 |
$source .= <<EOF; |
271 |
{ |
272 |
dSP; |
273 |
|
274 |
if (SvTRUE (TOPs)) |
275 |
{ |
276 |
--SP; |
277 |
PUTBACK; |
278 |
nextop = (OP *)${$op->other}L; |
279 |
goto op_${$op->other}; |
280 |
} |
281 |
} |
282 |
EOF |
283 |
|
284 |
out_next; |
285 |
} |
286 |
|
287 |
sub op_or { |
288 |
$source .= <<EOF; |
289 |
{ |
290 |
dSP; |
291 |
|
292 |
if (!SvTRUE (TOPs)) |
293 |
{ |
294 |
--SP; |
295 |
PUTBACK; |
296 |
nextop = (OP *)${$op->other}L; |
297 |
goto op_${$op->other}; |
298 |
} |
299 |
} |
300 |
EOF |
301 |
|
302 |
out_next; |
303 |
} |
304 |
|
305 |
sub op_padsv { |
306 |
my $flags = $op->flags; |
307 |
my $target = $op->targ; |
308 |
|
309 |
$source .= <<EOF; |
310 |
{ |
311 |
dSP; |
312 |
XPUSHs (PAD_SV ((PADOFFSET)$target)); |
313 |
PUTBACK; |
314 |
EOF |
315 |
if ($op->flags & B::OPf_MOD) { |
316 |
if ($op->private & B::OPpLVAL_INTRO) { |
317 |
$source .= " SAVECLEARSV (PAD_SVl ((PADOFFSET)$target));\n"; |
318 |
} elsif ($op->private & B::OPpDEREF) { |
319 |
my $deref = $op->private & B::OPpDEREF; |
320 |
$source .= " Perl_vivify_ref (PAD_SVl ((PADOFFSET)$target), $deref);\n"; |
321 |
} |
322 |
} |
323 |
$source .= <<EOF; |
324 |
} |
325 |
EOF |
326 |
|
327 |
out_next; |
328 |
} |
329 |
|
330 |
# pattern const+ (or general push1) |
331 |
# pattern pushmark return(?) |
332 |
# pattern pushmark gv rv2av pushmark padsv+o.ä. aassign |
333 |
|
334 |
# pattern const method_named |
335 |
sub xop_method_named { |
336 |
$source .= <<EOF; |
337 |
{ |
338 |
static HV *last_stash; |
339 |
static SV *last_cv; |
340 |
static U32 last_sub_generation; |
341 |
|
342 |
SV *obj = *(PL_stack_base + TOPMARK + 1); |
343 |
|
344 |
if (!SvGMAGICAL (obj) && SvROK (obj) && SvOBJECT (SvRV (obj))) |
345 |
{ |
346 |
dSP; |
347 |
HV *stash = SvSTASH (SvRV (obj)); |
348 |
|
349 |
/* simple "polymorphic" inline cache */ |
350 |
if (stash == last_stash |
351 |
&& PL_sub_generation == last_sub_generation) |
352 |
{ |
353 |
XPUSHs (last_cv); |
354 |
PUTBACK; |
355 |
} |
356 |
else |
357 |
{ |
358 |
PL_op = nextop; nextop = Perl_pp_method_named (aTHX); |
359 |
|
360 |
SPAGAIN; |
361 |
last_sub_generation = PL_sub_generation; |
362 |
last_stash = stash; |
363 |
last_cv = TOPs; |
364 |
} |
365 |
} |
366 |
else |
367 |
{ |
368 |
/* error case usually */ |
369 |
PL_op = nextop; nextop = Perl_pp_method_named (aTHX); |
370 |
} |
371 |
} |
372 |
EOF |
373 |
|
374 |
out_next; |
375 |
} |
376 |
|
377 |
sub op_grepstart { |
378 |
out_callop; |
379 |
out_cond_jump $op->next->other; |
380 |
out_jump_next; |
381 |
} |
382 |
|
383 |
*op_mapstart = \&op_grepstart; |
384 |
|
385 |
sub op_substcont { |
386 |
out_callop; |
387 |
out_cond_jump $op->other->pmreplstart; |
388 |
assert "nextop == (OP *)${$op->other->next}L"; |
389 |
$source .= " goto op_${$op->other->next};\n"; |
390 |
} |
391 |
|
392 |
sub out_break_op { |
393 |
my ($idx) = @_; |
394 |
|
395 |
out_callop; |
396 |
|
397 |
out_cond_jump $_->[$idx] |
398 |
for reverse @loop; |
399 |
|
400 |
$source .= " return nextop;\n"; |
401 |
} |
402 |
|
403 |
sub xop_next { |
404 |
out_break_op 0; |
405 |
} |
406 |
|
407 |
sub op_last { |
408 |
out_break_op 1; |
409 |
} |
410 |
|
411 |
sub xop_redo { |
412 |
out_break_op 2; |
413 |
} |
414 |
|
415 |
sub cv2c { |
416 |
my ($cv) = @_; |
417 |
|
418 |
@loop = (); |
419 |
|
420 |
my %opsseen; |
421 |
my @todo = $cv->START; |
422 |
|
423 |
while (my $op = shift @todo) { |
424 |
for (; $$op; $op = $op->next) { |
425 |
last if $opsseen{$$op}++; |
426 |
push @ops, $op; |
427 |
|
428 |
my $name = $op->name; |
429 |
my $class = B::class $op; |
430 |
|
431 |
if ($class eq "LOGOP") { |
432 |
unshift @todo, $op->other; # unshift vs. push saves jumps |
433 |
} elsif ($class eq "PMOP") { |
434 |
unshift @todo, $op->pmreplstart if ${$op->pmreplstart}; |
435 |
} elsif ($class eq "LOOP") { |
436 |
push @loop, [$op->nextop, $op->lastop->next, $op->redoop->next]; |
437 |
} |
438 |
} |
439 |
} |
440 |
|
441 |
local $source = <<EOF; |
442 |
OP *%%%FUNC%%% (pTHX) |
443 |
{ |
444 |
register OP *nextop = (OP *)${$ops[0]}L; |
445 |
EOF |
446 |
|
447 |
while (@ops) { |
448 |
$op = shift @ops; |
449 |
$op_name = $op->name; |
450 |
|
451 |
$source .= "op_$$op: /* $op_name */\n"; |
452 |
#$source .= "fprintf (stderr, \"$$op in op $op_name\\n\");\n";#d# |
453 |
#$source .= "{ dSP; sv_dump (TOPs); }\n";#d# |
454 |
|
455 |
$source .= " PERL_ASYNC_CHECK ();\n" |
456 |
unless exists $flag{noasync}{$op_name}; |
457 |
|
458 |
if (my $can = __PACKAGE__->can ("op_$op_name")) { |
459 |
# handcrafted replacement |
460 |
$can->($op); |
461 |
|
462 |
} elsif (exists $flag{unsafe}{$op_name}) { |
463 |
# unsafe, return to interpreter |
464 |
assert "nextop == (OP *)$$op"; |
465 |
$source .= " return nextop;\n"; |
466 |
|
467 |
} elsif ("LOGOP" eq B::class $op) { |
468 |
# logical operation with optionaö branch |
469 |
out_callop; |
470 |
out_cond_jump $op->other; |
471 |
out_jump_next; |
472 |
|
473 |
} elsif ("PMOP" eq B::class $op) { |
474 |
# regex-thingy |
475 |
out_callop; |
476 |
out_cond_jump $op->pmreplroot if ${$op->pmreplroot}; |
477 |
out_jump_next; |
478 |
|
479 |
} else { |
480 |
# normal operator, linear execution |
481 |
out_linear; |
482 |
} |
483 |
} |
484 |
|
485 |
$op_name = "func exit"; assert (0); |
486 |
|
487 |
$source .= <<EOF; |
488 |
op_0: |
489 |
return 0; |
490 |
} |
491 |
EOF |
492 |
#warn $source; |
493 |
|
494 |
$source |
495 |
} |
496 |
|
497 |
sub source2ptr { |
498 |
my ($source) = @_; |
499 |
|
500 |
my $md5 = Digest::MD5::md5_hex $source; |
501 |
$source =~ s/%%%FUNC%%%/Faster_$md5/; |
502 |
|
503 |
my $stem = "/tmp/$md5"; |
504 |
|
505 |
unless (-e "$stem$_so") { |
506 |
open FILE, ">:raw", "$stem.c"; |
507 |
print FILE <<EOF; |
508 |
#define PERL_NO_GET_CONTEXT |
509 |
|
510 |
#include <assert.h> |
511 |
|
512 |
#include "EXTERN.h" |
513 |
#include "perl.h" |
514 |
#include "XSUB.h" |
515 |
|
516 |
#define RUNOPS_TILL(op) \\ |
517 |
while (nextop != (op)) \\ |
518 |
{ \\ |
519 |
PERL_ASYNC_CHECK (); \\ |
520 |
PL_op = nextop; nextop = (PL_op->op_ppaddr)(aTHX); \\ |
521 |
} |
522 |
|
523 |
EOF |
524 |
print FILE $source; |
525 |
close FILE; |
526 |
system "$COMPILE -o $stem$_o $stem.c"; |
527 |
system "$LINK -o $stem$_so $stem$_o $LIBS"; |
528 |
} |
529 |
|
530 |
# warn $source; |
531 |
my $so = DynaLoader::dl_load_file "$stem$_so" |
532 |
or die "$stem$_so: $!"; |
533 |
|
534 |
DynaLoader::dl_find_symbol $so, "Faster_$md5" |
535 |
or die "Faster_$md5: $!" |
536 |
} |
537 |
|
538 |
sub entersub { |
539 |
my ($cv) = @_; |
540 |
|
541 |
# always compile the whole stash |
542 |
# my @stash = $cv->STASH->ARRAY; |
543 |
# warn join ":", @stash; |
544 |
# exit; |
545 |
|
546 |
eval { |
547 |
my $source = cv2c $cv; |
548 |
|
549 |
my $ptr = source2ptr $source; |
550 |
|
551 |
patch_cv $cv, $ptr; |
552 |
}; |
553 |
|
554 |
warn $@ if $@; |
555 |
} |
556 |
|
557 |
hook_entersub; |
558 |
|
559 |
1; |
560 |
|
561 |
=back |
562 |
|
563 |
=head1 BUGS/LIMITATIONS |
564 |
|
565 |
Perl will check much less often for asynchronous signals in |
566 |
Faster-compiled code. It tries to check on every function call, loop |
567 |
iteration and every I/O operator, though. |
568 |
|
569 |
The following things will disable Faster. If you manage to enable them at |
570 |
runtime, bad things will happen. |
571 |
|
572 |
enabled tainting |
573 |
enabled debugging |
574 |
|
575 |
This will dramatically reduce Faster's performance: |
576 |
|
577 |
threads (but you don't care about speed if you use threads anyway) |
578 |
|
579 |
These constructs will force the use of the interpreter as soon as they are |
580 |
being executed, for the rest of the currently executed: |
581 |
|
582 |
.., ... (flipflop operators) |
583 |
goto |
584 |
next, redo (but not well-behaved last's) |
585 |
eval |
586 |
require |
587 |
any use of formats |
588 |
|
589 |
=head1 AUTHOR |
590 |
|
591 |
Marc Lehmann <schmorp@schmorp.de> |
592 |
http://home.schmorp.de/ |
593 |
|
594 |
=cut |
595 |
|