| 1 |
=head1 NAME |
| 2 |
|
| 3 |
Faster - do some things faster |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use Faster; |
| 8 |
|
| 9 |
perl -MFaster ... |
| 10 |
|
| 11 |
=head1 DESCRIPTION |
| 12 |
|
| 13 |
This module implements a very simple-minded "JIT" (or actually AIT, ahead |
| 14 |
of time compiler). It works by more or less translating every function it |
| 15 |
sees into a C program, compiling it and then replacing the function by the |
| 16 |
compiled code. |
| 17 |
|
| 18 |
As a result, startup times are immense, as every function might lead to a |
| 19 |
full-blown compilation. |
| 20 |
|
| 21 |
The speed improvements are also not great, you can expect 20% or so on |
| 22 |
average, for code that runs very often. The reason for this is that data |
| 23 |
handling is mostly being done by the same old code, it just gets called |
| 24 |
a bit faster. Regexes and string operations won't get faster. Airhtmetic |
| 25 |
doresn't become any faster. Just the operands and other stuff is put on |
| 26 |
the stack faster, and the opcodes themselves have a bit less overhead. |
| 27 |
|
| 28 |
Faster is in the early stages of development. Due to its design its |
| 29 |
relatively safe to use (it will either work or simply slowdown the program |
| 30 |
immensely, but rarely cause bugs). |
| 31 |
|
| 32 |
More intelligent algorithms (loop optimisation, type inference) could |
| 33 |
improve that easily, but requires a much more elaborate presentation and |
| 34 |
optimiser than what is in place. There are no plans to improve Faster in |
| 35 |
this way, yet, but it would provide a reasonably good place to start. |
| 36 |
|
| 37 |
Usage is very easy, just C<use Faster> and every function called from then |
| 38 |
on will be compiled. |
| 39 |
|
| 40 |
Right now, Faster can leave lots of F<*.c> and F<*.so> files in your |
| 41 |
F<$FASTER_CACHEDIR> (by default F<$HOME/.perl-faster-cache>), and it will |
| 42 |
even create those temporary files in an insecure manner, so watch out. |
| 43 |
|
| 44 |
=over 4 |
| 45 |
|
| 46 |
=cut |
| 47 |
|
| 48 |
package Faster; |
| 49 |
|
| 50 |
no warnings; |
| 51 |
|
| 52 |
use strict; |
| 53 |
use Config; |
| 54 |
use B (); |
| 55 |
use DynaLoader (); |
| 56 |
use Digest::MD5 (); |
| 57 |
use Storable (); |
| 58 |
use Fcntl (); |
| 59 |
|
| 60 |
BEGIN { |
| 61 |
our $VERSION = '0.1'; |
| 62 |
|
| 63 |
require XSLoader; |
| 64 |
XSLoader::load __PACKAGE__, $VERSION; |
| 65 |
} |
| 66 |
|
| 67 |
my $CACHEDIR = |
| 68 |
$ENV{FASTER_CACHE} |
| 69 |
|| (exists $ENV{HOME} && "$ENV{HOME}/.perl-faster-cache") |
| 70 |
|| do { |
| 71 |
require File::Temp; |
| 72 |
File::Temp::tempdir (CLEANUP => 1) |
| 73 |
}; |
| 74 |
|
| 75 |
my $COMPILE = "$Config{cc} -c -I$Config{archlibexp}/CORE $Config{optimize} $Config{ccflags} $Config{cccdlflags}"; |
| 76 |
my $LINK = "$Config{ld} $Config{ldflags} $Config{lddlflags} $Config{ccdlflags}"; |
| 77 |
my $LIBS = ""; |
| 78 |
my $_o = $Config{_o}; |
| 79 |
my $_so = ".so"; |
| 80 |
|
| 81 |
# we don't need no steenking PIC on x86 |
| 82 |
$COMPILE =~ s/-f(?:PIC|pic)//g |
| 83 |
if $Config{archname} =~ /^(i[3456]86)-/; |
| 84 |
|
| 85 |
my $opt_assert = $ENV{FASTER_DEBUG} & 2; |
| 86 |
my $verbose = $ENV{FASTER_VERBOSE}+0; |
| 87 |
|
| 88 |
warn "Faster: CACHEDIR is $CACHEDIR\n" if $verbose > 2; |
| 89 |
|
| 90 |
our $source; |
| 91 |
|
| 92 |
our @ops; |
| 93 |
our $insn; |
| 94 |
our $op; |
| 95 |
our $op_name; |
| 96 |
our %op_regcomp; |
| 97 |
|
| 98 |
# ops that cause immediate return to the interpreter |
| 99 |
my %f_unsafe = map +($_ => undef), qw( |
| 100 |
leavesub leavesublv return |
| 101 |
goto last redo next |
| 102 |
eval flip leaveeval entertry |
| 103 |
formline grepstart mapstart |
| 104 |
substcont entereval require |
| 105 |
); |
| 106 |
|
| 107 |
# ops with known stack extend behaviour |
| 108 |
# the values given are maximum values |
| 109 |
my %extend = ( |
| 110 |
pushmark => 0, |
| 111 |
nextstate => 0, # might reduce the stack |
| 112 |
unstack => 0, |
| 113 |
enter => 0, |
| 114 |
|
| 115 |
stringify => 0, |
| 116 |
not => 0, |
| 117 |
and => 0, |
| 118 |
or => 0, |
| 119 |
gvsv => 0, |
| 120 |
rv2gv => 0, |
| 121 |
preinc => 0, |
| 122 |
predec => 0, |
| 123 |
postinc => 0, |
| 124 |
postdec => 0, |
| 125 |
aelem => 0, |
| 126 |
helem => 0, |
| 127 |
qr => 1, #??? |
| 128 |
pushre => 1, |
| 129 |
gv => 1, |
| 130 |
aelemfast => 1, |
| 131 |
aelem => 0, |
| 132 |
padsv => 1, |
| 133 |
const => 1, |
| 134 |
pop => 1, |
| 135 |
shift => 1, |
| 136 |
eq => -1, |
| 137 |
ne => -1, |
| 138 |
gt => -1, |
| 139 |
lt => -1, |
| 140 |
ge => -1, |
| 141 |
lt => -1, |
| 142 |
cond_expr => -1, |
| 143 |
add => -1, |
| 144 |
subtract => -1, |
| 145 |
multiply => -1, |
| 146 |
divide => -1, |
| 147 |
aassign => 0, |
| 148 |
sassign => -2, |
| 149 |
method => 0, |
| 150 |
method_named => 1, |
| 151 |
); |
| 152 |
|
| 153 |
# ops that do not need an ASYNC_CHECK |
| 154 |
my %f_noasync = map +($_ => undef), qw( |
| 155 |
mapstart grepstart match entereval |
| 156 |
enteriter entersub leaveloop |
| 157 |
|
| 158 |
pushmark nextstate caller |
| 159 |
|
| 160 |
const stub unstack |
| 161 |
last next redo goto seq |
| 162 |
padsv padav padhv padany |
| 163 |
aassign sassign orassign |
| 164 |
rv2av rv2cv rv2gv rv2hv refgen |
| 165 |
gv gvsv |
| 166 |
add subtract multiply divide |
| 167 |
complement cond_expr and or not |
| 168 |
bit_and bit_or bit_xor |
| 169 |
defined |
| 170 |
method method_named bless |
| 171 |
preinc postinc predec postdec |
| 172 |
aelem aelemfast helem delete exists |
| 173 |
pushre subst list lslice join split concat |
| 174 |
length substr stringify ord |
| 175 |
push pop shift unshift |
| 176 |
eq ne gt lt ge le |
| 177 |
regcomp regcreset regcmaybe |
| 178 |
); |
| 179 |
|
| 180 |
my %callop = ( |
| 181 |
entersub => "(PL_op->op_ppaddr) (aTHX)", |
| 182 |
mapstart => "Perl_pp_grepstart (aTHX)", |
| 183 |
); |
| 184 |
|
| 185 |
sub callop { |
| 186 |
$callop{$op_name} || "Perl_pp_$op_name (aTHX)" |
| 187 |
} |
| 188 |
|
| 189 |
sub assert { |
| 190 |
return unless $opt_assert; |
| 191 |
$source .= " assert ((\"$op_name\", ($_[0])));\n"; |
| 192 |
} |
| 193 |
|
| 194 |
sub out_callop { |
| 195 |
assert "nextop == (OP *)$$op"; |
| 196 |
$source .= " PL_op = nextop; nextop = " . (callop $op) . ";\n"; |
| 197 |
} |
| 198 |
|
| 199 |
sub out_jump { |
| 200 |
assert "nextop == (OP *)${$_[0]}L"; |
| 201 |
$source .= " goto op_${$_[0]};\n"; |
| 202 |
} |
| 203 |
|
| 204 |
sub out_cond_jump { |
| 205 |
$source .= " if (nextop == (OP *)${$_[0]}L) goto op_${$_[0]};\n"; |
| 206 |
} |
| 207 |
|
| 208 |
sub out_jump_next { |
| 209 |
out_cond_jump $op_regcomp{$$op} |
| 210 |
if $op_regcomp{$$op}; |
| 211 |
|
| 212 |
assert "nextop == (OP *)${$op->next}"; |
| 213 |
$source .= " goto op_${$op->next};\n"; |
| 214 |
} |
| 215 |
|
| 216 |
sub out_next { |
| 217 |
$source .= " nextop = (OP *)${$op->next}L;\n"; |
| 218 |
|
| 219 |
out_jump_next; |
| 220 |
} |
| 221 |
|
| 222 |
sub out_linear { |
| 223 |
out_callop; |
| 224 |
out_jump_next; |
| 225 |
} |
| 226 |
|
| 227 |
sub op_entersub { |
| 228 |
out_callop; |
| 229 |
$source .= " RUNOPS_TILL ((OP *)${$op->next}L);\n"; |
| 230 |
out_jump_next; |
| 231 |
} |
| 232 |
|
| 233 |
*op_require = \&op_entersub; |
| 234 |
|
| 235 |
sub op_nextstate { |
| 236 |
$source .= " PL_curcop = (COP *)nextop;\n"; |
| 237 |
$source .= " PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;\n"; |
| 238 |
$source .= " FREETMPS;\n"; |
| 239 |
|
| 240 |
out_next; |
| 241 |
} |
| 242 |
|
| 243 |
sub op_pushmark { |
| 244 |
$source .= " faster_PUSHMARK (PL_stack_sp);\n"; |
| 245 |
|
| 246 |
out_next; |
| 247 |
} |
| 248 |
|
| 249 |
if ($Config{useithreads} ne "define") { |
| 250 |
# disable optimisations on ithreads |
| 251 |
|
| 252 |
*op_const = sub { |
| 253 |
$source .= " { dSP; PUSHs ((SV *)${$op->sv}L); PUTBACK; }\n"; |
| 254 |
|
| 255 |
$ops[0]{follows_const}++ if @ops;#d# |
| 256 |
|
| 257 |
out_next; |
| 258 |
}; |
| 259 |
|
| 260 |
*op_gv = \&op_const; |
| 261 |
|
| 262 |
*op_aelemfast = sub { |
| 263 |
my $targ = $op->targ; |
| 264 |
my $private = $op->private; |
| 265 |
|
| 266 |
$source .= " {\n"; |
| 267 |
|
| 268 |
if ($op->flags & B::OPf_SPECIAL) { |
| 269 |
$source .= " AV *av = (AV*)PAD_SV((PADOFFSET)$targ);\n"; |
| 270 |
} else { |
| 271 |
$source .= " AV *av = GvAV ((GV *)${$op->sv}L);\n"; |
| 272 |
} |
| 273 |
|
| 274 |
if ($op->flags & B::OPf_MOD) { |
| 275 |
$source .= " SV *sv = *av_fetch (av, $private, 1);\n"; |
| 276 |
} else { |
| 277 |
$source .= " SV **svp = av_fetch (av, $private, 0); SV *sv = svp ? *svp : &PL_sv_undef;\n"; |
| 278 |
} |
| 279 |
|
| 280 |
if (!($op->flags & B::OPf_MOD)) { |
| 281 |
$source .= " if (SvGMAGICAL (sv)) sv = sv_mortalcopy (sv);\n"; |
| 282 |
} |
| 283 |
|
| 284 |
$source .= " dSP;\n"; |
| 285 |
$source .= " PUSHs (sv);\n"; |
| 286 |
$source .= " PUTBACK;\n"; |
| 287 |
$source .= " }\n"; |
| 288 |
|
| 289 |
out_next; |
| 290 |
}; |
| 291 |
|
| 292 |
*op_gvsv = sub { |
| 293 |
$source .= " {\n"; |
| 294 |
$source .= " dSP;\n"; |
| 295 |
|
| 296 |
if ($op->private & B::OPpLVAL_INTRO) { |
| 297 |
$source .= " PUSHs (save_scalar ((GV *)${$op->sv}L));\n"; |
| 298 |
} else { |
| 299 |
$source .= " PUSHs (GvSV ((GV *)${$op->sv}L));\n"; |
| 300 |
} |
| 301 |
|
| 302 |
$source .= " PUTBACK;\n"; |
| 303 |
$source .= " }\n"; |
| 304 |
|
| 305 |
out_next; |
| 306 |
}; |
| 307 |
} |
| 308 |
|
| 309 |
# does kill Crossfire/res2pm |
| 310 |
sub op_stringify { |
| 311 |
my $targ = $op->targ; |
| 312 |
|
| 313 |
$source .= <<EOF; |
| 314 |
{ |
| 315 |
dSP; |
| 316 |
SV *targ = PAD_SV ((PADOFFSET)$targ); |
| 317 |
sv_copypv (TARG, TOPs); |
| 318 |
SETTARG; |
| 319 |
PUTBACK; |
| 320 |
} |
| 321 |
EOF |
| 322 |
|
| 323 |
out_next; |
| 324 |
} |
| 325 |
|
| 326 |
sub op_and { |
| 327 |
$source .= <<EOF; |
| 328 |
{ |
| 329 |
dSP; |
| 330 |
|
| 331 |
if (SvTRUE (TOPs)) |
| 332 |
{ |
| 333 |
--SP; |
| 334 |
PUTBACK; |
| 335 |
nextop = (OP *)${$op->other}L; |
| 336 |
goto op_${$op->other}; |
| 337 |
} |
| 338 |
} |
| 339 |
EOF |
| 340 |
|
| 341 |
out_next; |
| 342 |
} |
| 343 |
|
| 344 |
sub op_or { |
| 345 |
$source .= <<EOF; |
| 346 |
{ |
| 347 |
dSP; |
| 348 |
|
| 349 |
if (!SvTRUE (TOPs)) |
| 350 |
{ |
| 351 |
--SP; |
| 352 |
PUTBACK; |
| 353 |
nextop = (OP *)${$op->other}L; |
| 354 |
goto op_${$op->other}; |
| 355 |
} |
| 356 |
} |
| 357 |
EOF |
| 358 |
|
| 359 |
out_next; |
| 360 |
} |
| 361 |
|
| 362 |
sub op_padsv { |
| 363 |
my $flags = $op->flags; |
| 364 |
my $padofs = "(PADOFFSET)" . $op->targ; |
| 365 |
|
| 366 |
$source .= <<EOF; |
| 367 |
{ |
| 368 |
dSP; |
| 369 |
SV *sv = PAD_SVl ($padofs); |
| 370 |
EOF |
| 371 |
|
| 372 |
if (($flags & B::OPf_MOD) && ($op->private & B::OPpLVAL_INTRO)) { |
| 373 |
$source .= " SAVECLEARSV (PAD_SVl ($padofs));\n"; |
| 374 |
$ops[0]{follows_padsv_lval_intro}++ if @ops;#d# |
| 375 |
} |
| 376 |
|
| 377 |
$source .= <<EOF; |
| 378 |
PUSHs (sv); |
| 379 |
PUTBACK; |
| 380 |
EOF |
| 381 |
|
| 382 |
if (($flags & B::OPf_MOD) && ($op->private & B::OPpDEREF)) { |
| 383 |
$source .= " if (!SvROK (sv)) vivify_ref (sv, " . $op->private . " & OPpDEREF);\n"; |
| 384 |
} |
| 385 |
$source .= " }\n"; |
| 386 |
|
| 387 |
out_next; |
| 388 |
} |
| 389 |
|
| 390 |
sub op_sassign { |
| 391 |
$source .= <<EOF; |
| 392 |
{ |
| 393 |
dSP; |
| 394 |
dPOPTOPssrl; |
| 395 |
EOF |
| 396 |
$source .= " SV *temp = left; left = right; right = temp;\n" |
| 397 |
if $op->private & B::OPpASSIGN_BACKWARDS; |
| 398 |
|
| 399 |
if ($insn->{follows_padsv_lval_intro} && !($op->private & B::OPpASSIGN_BACKWARDS)) { |
| 400 |
# simple assignment - the target exists, but is basically undef |
| 401 |
$source .= " SvSetSV (right, left);\n"; |
| 402 |
} else { |
| 403 |
$source .= " SvSetMagicSV (right, left);\n"; |
| 404 |
} |
| 405 |
|
| 406 |
$source .= <<EOF; |
| 407 |
SETs (right); |
| 408 |
PUTBACK; |
| 409 |
} |
| 410 |
EOF |
| 411 |
|
| 412 |
out_next; |
| 413 |
} |
| 414 |
|
| 415 |
# pattern const+ (or general push1) |
| 416 |
# pattern pushmark gv rv2av pushmark padsv+o.ä. aassign |
| 417 |
|
| 418 |
sub op_method_named { |
| 419 |
if ($insn->{follows_const}) { |
| 420 |
$source .= <<EOF; |
| 421 |
{ |
| 422 |
dSP; |
| 423 |
static SV *last_cv; |
| 424 |
static U32 last_sub_generation; |
| 425 |
|
| 426 |
/* simple "polymorphic" inline cache */ |
| 427 |
if (PL_sub_generation == last_sub_generation) |
| 428 |
{ |
| 429 |
PUSHs (last_cv); |
| 430 |
PUTBACK; |
| 431 |
} |
| 432 |
else |
| 433 |
{ |
| 434 |
PL_op = nextop; nextop = Perl_pp_method_named (aTHX); |
| 435 |
|
| 436 |
SPAGAIN; |
| 437 |
last_sub_generation = PL_sub_generation; |
| 438 |
last_cv = TOPs; |
| 439 |
} |
| 440 |
} |
| 441 |
EOF |
| 442 |
} else { |
| 443 |
$source .= <<EOF; |
| 444 |
{ |
| 445 |
static HV *last_stash; |
| 446 |
static SV *last_cv; |
| 447 |
static U32 last_sub_generation; |
| 448 |
|
| 449 |
SV *obj = *(PL_stack_base + TOPMARK + 1); |
| 450 |
|
| 451 |
if (!SvGMAGICAL (obj) && SvROK (obj) && SvOBJECT (SvRV (obj))) |
| 452 |
{ |
| 453 |
dSP; |
| 454 |
HV *stash = SvSTASH (SvRV (obj)); |
| 455 |
|
| 456 |
/* simple "polymorphic" inline cache */ |
| 457 |
if (stash == last_stash |
| 458 |
&& PL_sub_generation == last_sub_generation) |
| 459 |
{ |
| 460 |
PUSHs (last_cv); |
| 461 |
PUTBACK; |
| 462 |
} |
| 463 |
else |
| 464 |
{ |
| 465 |
PL_op = nextop; nextop = Perl_pp_method_named (aTHX); |
| 466 |
|
| 467 |
SPAGAIN; |
| 468 |
last_sub_generation = PL_sub_generation; |
| 469 |
last_stash = stash; |
| 470 |
last_cv = TOPs; |
| 471 |
} |
| 472 |
} |
| 473 |
else |
| 474 |
{ |
| 475 |
/* error case usually */ |
| 476 |
PL_op = nextop; nextop = Perl_pp_method_named (aTHX); |
| 477 |
} |
| 478 |
} |
| 479 |
EOF |
| 480 |
} |
| 481 |
|
| 482 |
out_next; |
| 483 |
} |
| 484 |
|
| 485 |
sub op_grepstart { |
| 486 |
out_callop; |
| 487 |
$op = $op->next; |
| 488 |
out_cond_jump $op->other; |
| 489 |
out_jump_next; |
| 490 |
} |
| 491 |
|
| 492 |
*op_mapstart = \&op_grepstart; |
| 493 |
|
| 494 |
sub op_substcont { |
| 495 |
out_callop; |
| 496 |
out_cond_jump $op->other->pmreplstart; |
| 497 |
assert "nextop == (OP *)${$op->other->next}L"; |
| 498 |
$source .= " goto op_${$op->other->next};\n"; |
| 499 |
} |
| 500 |
|
| 501 |
sub out_break_op { |
| 502 |
my ($idx) = @_; |
| 503 |
|
| 504 |
if ($op->flags & B::OPf_SPECIAL && $insn->{loop}) { |
| 505 |
# common case: no label, innermost loop only |
| 506 |
my $next = $insn->{loop}{loop_targ}[$idx]; |
| 507 |
out_callop; |
| 508 |
out_jump $next; |
| 509 |
} elsif (my $loop = $insn->{loop}) { |
| 510 |
# less common case: maybe break to some outer loop |
| 511 |
$source .= " return nextop;\n"; |
| 512 |
# todo: walk stack up |
| 513 |
} else { |
| 514 |
# fuck yourself for writing such hacks |
| 515 |
$source .= " return nextop;\n"; |
| 516 |
} |
| 517 |
} |
| 518 |
|
| 519 |
sub op_next { |
| 520 |
out_break_op 0; |
| 521 |
} |
| 522 |
|
| 523 |
sub op_last { |
| 524 |
out_break_op 1; |
| 525 |
} |
| 526 |
|
| 527 |
# TODO: does not seem to work |
| 528 |
#sub op_redo { |
| 529 |
# out_break_op 2; |
| 530 |
#} |
| 531 |
|
| 532 |
sub cv2c { |
| 533 |
my ($cv) = @_; |
| 534 |
|
| 535 |
local @ops; |
| 536 |
local %op_regcomp; |
| 537 |
|
| 538 |
my $curloop; |
| 539 |
my @todo = $cv->START; |
| 540 |
my %op_target; |
| 541 |
my $numpushmark; |
| 542 |
my $scope; |
| 543 |
|
| 544 |
my %op_seen; |
| 545 |
while (my $op = shift @todo) { |
| 546 |
my $next; |
| 547 |
for (; $$op; $op = $next) { |
| 548 |
last if $op_seen{$$op}++; |
| 549 |
|
| 550 |
$next = $op->next; |
| 551 |
|
| 552 |
my $name = $op->name; |
| 553 |
my $class = B::class $op; |
| 554 |
|
| 555 |
my $insn = { op => $op }; |
| 556 |
|
| 557 |
# end of loop reached? |
| 558 |
$curloop = $curloop->{loop} if $curloop && $$op == ${$curloop->{loop_targ}[1]}; |
| 559 |
|
| 560 |
# remember enclosing loop |
| 561 |
$insn->{loop} = $curloop if $curloop; |
| 562 |
|
| 563 |
push @ops, $insn; |
| 564 |
|
| 565 |
if (exists $extend{$name}) { |
| 566 |
my $extend = $extend{$name}; |
| 567 |
$extend = $extend->($op) if ref $extend; |
| 568 |
$insn->{extend} = $extend if defined $extend; |
| 569 |
} |
| 570 |
|
| 571 |
# TODO: mark scopes similar to loops, make them comparable |
| 572 |
# static cxstack(?) |
| 573 |
if ($class eq "LOGOP") { |
| 574 |
push @todo, $op->other; |
| 575 |
$op_target{${$op->other}}++; |
| 576 |
|
| 577 |
# regcomp/o patches ops at runtime, lets expect that |
| 578 |
if ($name eq "regcomp" && $op->other->pmflags & B::PMf_KEEP) { |
| 579 |
$op_target{${$op->first}}++; |
| 580 |
$op_regcomp{${$op->first}} = $op->next; |
| 581 |
} |
| 582 |
|
| 583 |
} elsif ($class eq "PMOP") { |
| 584 |
if (${$op->pmreplstart}) { |
| 585 |
unshift @todo, $op->pmreplstart; |
| 586 |
$op_target{${$op->pmreplstart}}++; |
| 587 |
} |
| 588 |
|
| 589 |
} elsif ($class eq "LOOP") { |
| 590 |
my @targ = ($op->nextop, $op->lastop->next, $op->redoop); |
| 591 |
|
| 592 |
unshift @todo, $next, $op->redoop, $op->nextop, $op->lastop; |
| 593 |
$next = $op->redoop; |
| 594 |
|
| 595 |
$op_target{$$_}++ for @targ; |
| 596 |
|
| 597 |
$insn->{loop_targ} = \@targ; |
| 598 |
$curloop = $insn; |
| 599 |
|
| 600 |
} elsif ($class eq "COP") { |
| 601 |
if (defined $op->label) { |
| 602 |
$insn->{bblock}++; |
| 603 |
$curloop->{contains_label}{$op->label}++ if $curloop; #TODO: should be within loop |
| 604 |
} |
| 605 |
|
| 606 |
} else { |
| 607 |
if ($name eq "pushmark") { |
| 608 |
$numpushmark++; |
| 609 |
} |
| 610 |
} |
| 611 |
} |
| 612 |
} |
| 613 |
|
| 614 |
$_->{bblock}++ for grep $op_target{${$_->{op}}}, @ops; |
| 615 |
|
| 616 |
local $source = <<EOF; |
| 617 |
OP *%%%FUNC%%% (pTHX) |
| 618 |
{ |
| 619 |
register OP *nextop = (OP *)${$ops[0]->{op}}L; |
| 620 |
EOF |
| 621 |
|
| 622 |
$source .= " faster_PUSHMARK_PREALLOC ($numpushmark);\n" |
| 623 |
if $numpushmark; |
| 624 |
|
| 625 |
while (@ops) { |
| 626 |
$insn = shift @ops; |
| 627 |
|
| 628 |
$op = $insn->{op}; |
| 629 |
$op_name = $op->name; |
| 630 |
|
| 631 |
my $class = B::class $op; |
| 632 |
|
| 633 |
$source .= "\n/* start basic block */\n" if exists $insn->{bblock};#d# |
| 634 |
$source .= "op_$$op: /* $op_name */\n"; |
| 635 |
#$source .= "fprintf (stderr, \"$$op in op $op_name\\n\");\n";#d# |
| 636 |
#$source .= "{ dSP; sv_dump (TOPs); }\n";#d# |
| 637 |
|
| 638 |
$source .= " PERL_ASYNC_CHECK ();\n" |
| 639 |
unless exists $f_noasync{$op_name}; |
| 640 |
|
| 641 |
if (my $can = __PACKAGE__->can ("op_$op_name")) { |
| 642 |
# handcrafted replacement |
| 643 |
|
| 644 |
if ($insn->{extend} > 0) { |
| 645 |
# coalesce EXTENDs |
| 646 |
# TODO: properly take negative preceeding and following EXTENDs into account |
| 647 |
for my $i (@ops) { |
| 648 |
last if exists $i->{bblock}; |
| 649 |
last unless exists $i->{extend}; |
| 650 |
my $extend = delete $i->{extend}; |
| 651 |
$insn->{extend} += $extend if $extend > 0; |
| 652 |
} |
| 653 |
|
| 654 |
$source .= " { dSP; EXTEND (SP, $insn->{extend}); PUTBACK; }\n" |
| 655 |
if $insn->{extend} > 0; |
| 656 |
} |
| 657 |
|
| 658 |
$can->($op); |
| 659 |
|
| 660 |
} elsif (exists $f_unsafe{$op_name}) { |
| 661 |
# unsafe, return to interpreter |
| 662 |
assert "nextop == (OP *)$$op"; |
| 663 |
$source .= " return nextop;\n"; |
| 664 |
|
| 665 |
} elsif ("LOGOP" eq $class) { |
| 666 |
# logical operation with optional branch |
| 667 |
out_callop; |
| 668 |
out_cond_jump $op->other; |
| 669 |
out_jump_next; |
| 670 |
|
| 671 |
} elsif ("PMOP" eq $class) { |
| 672 |
# regex-thingy |
| 673 |
out_callop; |
| 674 |
out_cond_jump $op->pmreplroot if $op_name ne "pushre" && ${$op->pmreplroot}; |
| 675 |
out_jump_next; |
| 676 |
|
| 677 |
} else { |
| 678 |
# normal operator, linear execution |
| 679 |
out_linear; |
| 680 |
} |
| 681 |
} |
| 682 |
|
| 683 |
$op_name = "func exit"; assert (0); |
| 684 |
|
| 685 |
$source .= <<EOF; |
| 686 |
op_0: |
| 687 |
return 0; |
| 688 |
} |
| 689 |
EOF |
| 690 |
#warn $source; |
| 691 |
|
| 692 |
$source |
| 693 |
} |
| 694 |
|
| 695 |
my $uid = "aaaaaaa0"; |
| 696 |
my %so; |
| 697 |
|
| 698 |
sub func2ptr { |
| 699 |
my (@func) = @_; |
| 700 |
|
| 701 |
#LOCK |
| 702 |
mkdir $CACHEDIR, 0777; |
| 703 |
sysopen my $meta_fh, "$CACHEDIR/meta", &Fcntl::O_RDWR | &Fcntl::O_CREAT, 0666 |
| 704 |
or die "$$CACHEDIR/meta: $!"; |
| 705 |
binmode $meta_fh, ":raw:perlio"; |
| 706 |
fcntl_lock fileno $meta_fh |
| 707 |
or die "$CACHEDIR/meta: $!"; |
| 708 |
|
| 709 |
my $meta = eval { Storable::fd_retrieve $meta_fh } || { version => 1 }; |
| 710 |
|
| 711 |
for my $f (@func) { |
| 712 |
$f->{func} = "F" . Digest::MD5::md5_hex ($f->{source}); |
| 713 |
$f->{so} = $meta->{$f->{func}}; |
| 714 |
} |
| 715 |
|
| 716 |
if (grep !$_->{so}, @func) { |
| 717 |
my $stem; |
| 718 |
|
| 719 |
do { |
| 720 |
$stem = "$CACHEDIR/$$-" . $uid++; |
| 721 |
} while -e "$stem$_so"; |
| 722 |
|
| 723 |
open my $fh, ">:raw", "$stem.c"; |
| 724 |
print $fh <<EOF; |
| 725 |
#define PERL_NO_GET_CONTEXT |
| 726 |
#define PERL_CORE |
| 727 |
|
| 728 |
#include <assert.h> |
| 729 |
|
| 730 |
#include "EXTERN.h" |
| 731 |
#include "perl.h" |
| 732 |
#include "XSUB.h" |
| 733 |
|
| 734 |
#if 1 |
| 735 |
# define faster_PUSHMARK_PREALLOC(count) while (PL_markstack_ptr + (count) >= PL_markstack_max) markstack_grow () |
| 736 |
# define faster_PUSHMARK(p) *++PL_markstack_ptr = (p) - PL_stack_base |
| 737 |
#else |
| 738 |
# define faster_PUSHMARK_PREALLOC(count) 1 |
| 739 |
# define faster_PUSHMARK(p) PUSHMARK(p) |
| 740 |
#endif |
| 741 |
|
| 742 |
#define RUNOPS_TILL(op) \\ |
| 743 |
while (nextop != (op)) \\ |
| 744 |
{ \\ |
| 745 |
PERL_ASYNC_CHECK (); \\ |
| 746 |
PL_op = nextop; nextop = (PL_op->op_ppaddr)(aTHX); \\ |
| 747 |
} |
| 748 |
|
| 749 |
EOF |
| 750 |
for my $f (grep !$_->{so}, @func) { |
| 751 |
next if $f->{so} = $meta->{$f->{func}}; # some cv's alias others |
| 752 |
|
| 753 |
warn "compiling $f->{name} to $stem$_so:$f->{func}\n" if $verbose > 1; |
| 754 |
my $source = $f->{source}; |
| 755 |
$source =~ s/%%%FUNC%%%/$f->{func}/g; |
| 756 |
print $fh $source; |
| 757 |
$meta->{$f->{func}} = $f->{so} = $stem; |
| 758 |
} |
| 759 |
|
| 760 |
close $fh; |
| 761 |
system "$COMPILE -o $stem$_o $stem.c"; |
| 762 |
unlink "$stem.c" unless $ENV{FASTER_DEBUG} & 1; |
| 763 |
system "$LINK -o $stem$_so $stem$_o $LIBS"; |
| 764 |
unlink "$stem$_o"; |
| 765 |
} |
| 766 |
|
| 767 |
for my $f (@func) { |
| 768 |
my $stem = $f->{so}; |
| 769 |
|
| 770 |
my $so = ($so{$stem} ||= DynaLoader::dl_load_file "$stem$_so") |
| 771 |
or die "$stem$_so: $!"; |
| 772 |
|
| 773 |
#unlink "$stem$_so"; |
| 774 |
|
| 775 |
$f->{ptr} = DynaLoader::dl_find_symbol $so, $f->{func} |
| 776 |
or die "$f->{func} not found in $stem$_so: $!"; |
| 777 |
} |
| 778 |
|
| 779 |
seek $meta_fh, 0, 0 or die "$CACHEDIR/meta: $!"; |
| 780 |
Storable::nstore_fd $meta, $meta_fh; |
| 781 |
truncate $meta_fh, tell $meta_fh; |
| 782 |
|
| 783 |
# UNLOCK (by closing $meta_fh) |
| 784 |
} |
| 785 |
|
| 786 |
my %ignore; |
| 787 |
|
| 788 |
sub entersub { |
| 789 |
my ($cv) = @_; |
| 790 |
|
| 791 |
my $pkg = $cv->STASH->NAME; |
| 792 |
|
| 793 |
return if $ignore{$pkg}; |
| 794 |
|
| 795 |
warn "optimising ", $cv->STASH->NAME, "\n" |
| 796 |
if $verbose; |
| 797 |
|
| 798 |
eval { |
| 799 |
my @func; |
| 800 |
|
| 801 |
push @func, { |
| 802 |
cv => $cv, |
| 803 |
name => "<>", |
| 804 |
source => cv2c $cv, |
| 805 |
}; |
| 806 |
|
| 807 |
# always compile the whole stash |
| 808 |
my %stash = $cv->STASH->ARRAY; |
| 809 |
while (my ($k, $v) = each %stash) { |
| 810 |
$v->isa (B::GV::) |
| 811 |
or next; |
| 812 |
|
| 813 |
my $cv = $v->CV; |
| 814 |
|
| 815 |
if ($cv->isa (B::CV::) |
| 816 |
&& ${$cv->START} |
| 817 |
&& $cv->START->name ne "null") { |
| 818 |
|
| 819 |
push @func, { |
| 820 |
cv => $cv, |
| 821 |
name => $k, |
| 822 |
source => cv2c $cv, |
| 823 |
}; |
| 824 |
} |
| 825 |
} |
| 826 |
|
| 827 |
func2ptr @func; |
| 828 |
|
| 829 |
for my $f (@func) { |
| 830 |
patch_cv $f->{cv}, $f->{ptr}; |
| 831 |
} |
| 832 |
}; |
| 833 |
|
| 834 |
if ($@) { |
| 835 |
$ignore{$pkg}++; |
| 836 |
warn $@; |
| 837 |
} |
| 838 |
} |
| 839 |
|
| 840 |
hook_entersub; |
| 841 |
|
| 842 |
1; |
| 843 |
|
| 844 |
=back |
| 845 |
|
| 846 |
=head1 ENVIRONMENT VARIABLES |
| 847 |
|
| 848 |
The following environment variables influence the behaviour of Faster: |
| 849 |
|
| 850 |
=over 4 |
| 851 |
|
| 852 |
=item FASTER_VERBOSE |
| 853 |
|
| 854 |
Faster will output more informational messages when set to values higher |
| 855 |
than C<0>. Currently, C<1> outputs which packages are being compiled, C<3> |
| 856 |
outputs the cache directory and C<10> outputs information on which perl |
| 857 |
function is compiled into which shared object. |
| 858 |
|
| 859 |
=item FASTER_DEBUG |
| 860 |
|
| 861 |
Add debugging code when set to values higher than C<0>. Currently, this |
| 862 |
adds 1-3 C<assert>'s per perl op (FASTER_DEBUG > 1), to ensure that opcode |
| 863 |
order and C execution order are compatible. |
| 864 |
|
| 865 |
=item FASTER_CACHE |
| 866 |
|
| 867 |
Set a persistent cache directory that caches compiled code fragments. The |
| 868 |
default is C<$HOME/.perl-faster-cache> if C<HOME> is set and a temporary |
| 869 |
directory otherwise. |
| 870 |
|
| 871 |
This directory will always grow in size, so you might need to erase it |
| 872 |
from time to time. |
| 873 |
|
| 874 |
=back |
| 875 |
|
| 876 |
=head1 BUGS/LIMITATIONS |
| 877 |
|
| 878 |
Perl will check much less often for asynchronous signals in |
| 879 |
Faster-compiled code. It tries to check on every function call, loop |
| 880 |
iteration and every I/O operator, though. |
| 881 |
|
| 882 |
The following things will disable Faster. If you manage to enable them at |
| 883 |
runtime, bad things will happen. Enabling them at startup will be fine, |
| 884 |
though. |
| 885 |
|
| 886 |
enabled tainting |
| 887 |
enabled debugging |
| 888 |
|
| 889 |
Thread-enabled builds of perl will dramatically reduce Faster's |
| 890 |
performance, but you don't care about speed if you enable threads anyway. |
| 891 |
|
| 892 |
These constructs will force the use of the interpreter for the currently |
| 893 |
executed function as soon as they are being encountered during execution. |
| 894 |
|
| 895 |
goto |
| 896 |
next, redo (but not well-behaved last's) |
| 897 |
labels, if used |
| 898 |
eval |
| 899 |
require |
| 900 |
any use of formats |
| 901 |
.., ... (flipflop operators) |
| 902 |
|
| 903 |
=head1 AUTHOR |
| 904 |
|
| 905 |
Marc Lehmann <schmorp@schmorp.de> |
| 906 |
http://home.schmorp.de/ |
| 907 |
|
| 908 |
=cut |
| 909 |
|
