| 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 |
our $source; |
| 37 |
our $label_next; |
| 38 |
our $label_last; |
| 39 |
our $label_redo; |
| 40 |
|
| 41 |
my %flag; |
| 42 |
|
| 43 |
for (split /\n/, <<EOF) { |
| 44 |
leavesub unsafe |
| 45 |
leavesublv unsafe |
| 46 |
return unsafe |
| 47 |
flip unsafe |
| 48 |
goto unsafe |
| 49 |
last unsafe |
| 50 |
redo unsafe |
| 51 |
next unsafe |
| 52 |
eval unsafe |
| 53 |
leaveeval unsafe |
| 54 |
entertry unsafe |
| 55 |
substconst unsafe |
| 56 |
formline unsafe |
| 57 |
grepstart unsafe |
| 58 |
require unsafe |
| 59 |
match unsafe todo |
| 60 |
subst unsafe todo |
| 61 |
entereval unsafe todo |
| 62 |
mapstart unsafe todo |
| 63 |
|
| 64 |
pushmark noasync |
| 65 |
padsv noasync |
| 66 |
entersub noasync |
| 67 |
aassign noasync |
| 68 |
sassign noasync |
| 69 |
rv2av noasync |
| 70 |
nextstate noasync |
| 71 |
gv noasync |
| 72 |
gvsv noasync |
| 73 |
add noasync |
| 74 |
subtract noasync |
| 75 |
multiply noasync |
| 76 |
divide noasync |
| 77 |
complement noasync |
| 78 |
cond_expr noasync |
| 79 |
and noasync |
| 80 |
or noasync |
| 81 |
not noasync |
| 82 |
method_named noasync |
| 83 |
preinc noasync |
| 84 |
postinc noasync |
| 85 |
predec noasync |
| 86 |
postdec noasync |
| 87 |
stub noasync |
| 88 |
unstack noasync |
| 89 |
leaveloop noasync |
| 90 |
shift noasync |
| 91 |
aelemA noasync |
| 92 |
aelemfast noasync |
| 93 |
EOF |
| 94 |
my (undef, $op, @flags) = split /\s+/; |
| 95 |
|
| 96 |
undef $flag{$_}{$op} |
| 97 |
for ("known", @flags); |
| 98 |
} |
| 99 |
|
| 100 |
sub out_next { |
| 101 |
my ($op) = @_; |
| 102 |
|
| 103 |
if (${$op->next}) { |
| 104 |
$source .= " nextop = (OP *)${$op->next}L;\n"; |
| 105 |
$source .= " goto op_${$op->next};\n"; |
| 106 |
} else { |
| 107 |
$source .= " return 0;\n"; |
| 108 |
} |
| 109 |
} |
| 110 |
|
| 111 |
sub callop { |
| 112 |
my ($op) = @_; |
| 113 |
|
| 114 |
my $name = $op->name; |
| 115 |
|
| 116 |
$name eq "entersub" |
| 117 |
? "(PL_ppaddr [OP_ENTERSUB]) (aTHX)" |
| 118 |
: $name eq "mapstart" |
| 119 |
? "Perl_pp_grepstart (aTHX)" |
| 120 |
: "Perl_pp_$name (aTHX)" |
| 121 |
} |
| 122 |
|
| 123 |
sub op_nextstate { |
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my ($op) = @_; |
| 125 |
|
| 126 |
$source .= " PL_curcop = (COP *)nextop;\n"; |
| 127 |
$source .= " PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;\n"; |
| 128 |
$source .= " FREETMPS;\n"; |
| 129 |
|
| 130 |
out_next $op; |
| 131 |
} |
| 132 |
|
| 133 |
sub op_pushmark { |
| 134 |
my ($op) = @_; |
| 135 |
|
| 136 |
$source .= " PUSHMARK (PL_stack_sp);\n"; |
| 137 |
|
| 138 |
out_next $op; |
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} |
| 140 |
|
| 141 |
sub op_const { |
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my ($op) = @_; |
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|
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$source .= " { dSP; XPUSHs ((SV *)${$op->sv}L); PUTBACK; }\n"; |
| 145 |
|
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out_next $op; |
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} |
| 148 |
|
| 149 |
*op_gv = \&op_const; |
| 150 |
|
| 151 |
sub op_stringify { |
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my ($op) = @_; |
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|
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$source .= " { dSP; dTARGET; sv_copypv (TARG, TOPs); SETTARG; }\n"; |
| 155 |
|
| 156 |
out_next $op; |
| 157 |
} |
| 158 |
|
| 159 |
sub op_and { |
| 160 |
my ($op) = @_; |
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|
| 162 |
$source .= <<EOF; |
| 163 |
{ |
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dSP; |
| 165 |
|
| 166 |
if (SvTRUE (TOPs)) |
| 167 |
{ |
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--SP; |
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PUTBACK; |
| 170 |
nextop = (OP *)${$op->other}L; |
| 171 |
goto op_${$op->other}; |
| 172 |
} |
| 173 |
} |
| 174 |
EOF |
| 175 |
|
| 176 |
out_next $op; |
| 177 |
} |
| 178 |
|
| 179 |
sub op_padsv { |
| 180 |
my ($op) = @_; |
| 181 |
|
| 182 |
my $flags = $op->flags; |
| 183 |
my $target = $op->targ; |
| 184 |
|
| 185 |
$source .= <<EOF; |
| 186 |
{ |
| 187 |
dSP; |
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XPUSHs (PAD_SV ((PADOFFSET)$target)); |
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PUTBACK; |
| 190 |
EOF |
| 191 |
if ($op->flags & B::OPf_MOD) { |
| 192 |
if ($op->private & B::OPpLVAL_INTRO) { |
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$source .= " SAVECLEARSV (PAD_SVl ((PADOFFSET)$target));\n"; |
| 194 |
} elsif ($op->private & B::OPpDEREF) { |
| 195 |
my $deref = $op->private & B::OPpDEREF; |
| 196 |
$source .= " Perl_vivify_ref (PAD_SVl ((PADOFFSET)$target), $deref);\n"; |
| 197 |
} |
| 198 |
} |
| 199 |
$source .= <<EOF; |
| 200 |
} |
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EOF |
| 202 |
|
| 203 |
out_next $op; |
| 204 |
} |
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|
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# pattern const+ (or general push1) |
| 207 |
# pattern pushmark return(?) |
| 208 |
# pattern pushmark gv rv2av pushmark padsv+o.รค. aassign |
| 209 |
|
| 210 |
# pattern const method_named |
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sub op_method_named { |
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my ($op) = @_; |
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|
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$source .= <<EOF; |
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{ |
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static HV *last_stash; |
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static SV *last_res; |
| 218 |
|
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SV *obj = *(PL_stack_base + TOPMARK + 1); |
| 220 |
|
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if (SvROK (obj) && SvOBJECT (SvRV (obj))) |
| 222 |
{ |
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dSP; |
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HV *stash = SvSTASH (SvRV (obj)); |
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|
| 226 |
/* simple "polymorphic" inline cache */ |
| 227 |
if (stash == last_stash) |
| 228 |
{ |
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XPUSHs (last_res); |
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PUTBACK; |
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} |
| 232 |
else |
| 233 |
{ |
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PL_op = nextop; |
| 235 |
nextop = Perl_pp_method_named (aTHX); |
| 236 |
|
| 237 |
SPAGAIN; |
| 238 |
last_stash = stash; |
| 239 |
last_res = TOPs; |
| 240 |
} |
| 241 |
} |
| 242 |
else |
| 243 |
{ |
| 244 |
/* error case usually */ |
| 245 |
PL_op = nextop; |
| 246 |
nextop = Perl_pp_method_named (aTHX); |
| 247 |
} |
| 248 |
} |
| 249 |
EOF |
| 250 |
|
| 251 |
out_next $op; |
| 252 |
} |
| 253 |
|
| 254 |
sub cv2c { |
| 255 |
my ($cv) = @_; |
| 256 |
|
| 257 |
my %opsseen; |
| 258 |
my @ops; |
| 259 |
my @todo = $cv->START; |
| 260 |
|
| 261 |
while (my $op = shift @todo) { |
| 262 |
for (; $$op; $op = $op->next) { |
| 263 |
last if $opsseen{$$op}++; |
| 264 |
push @ops, $op; |
| 265 |
my $name = $op->name; |
| 266 |
if (B::class($op) eq "LOGOP") { |
| 267 |
push @todo, $op->other; |
| 268 |
} elsif ($name eq "subst" and ${ $op->pmreplstart }) { |
| 269 |
push @todo, $op->pmreplstart; |
| 270 |
} elsif ($name =~ /^enter(loop|iter)$/) { |
| 271 |
# if ($] > 5.009) { |
| 272 |
# $labels{${$op->nextop}} = "NEXT"; |
| 273 |
# $labels{${$op->lastop}} = "LAST"; |
| 274 |
# $labels{${$op->redoop}} = "REDO"; |
| 275 |
# } else { |
| 276 |
# $labels{$op->nextop->seq} = "NEXT"; |
| 277 |
# $labels{$op->lastop->seq} = "LAST"; |
| 278 |
# $labels{$op->redoop->seq} = "REDO"; |
| 279 |
# } |
| 280 |
} |
| 281 |
} |
| 282 |
} |
| 283 |
|
| 284 |
local $source = <<EOF; |
| 285 |
#define PERL_NO_GET_CONTEXT |
| 286 |
|
| 287 |
#include <assert.h> |
| 288 |
|
| 289 |
#include "EXTERN.h" |
| 290 |
#include "perl.h" |
| 291 |
#include "XSUB.h" |
| 292 |
|
| 293 |
/*typedef OP *(*PPFUNC)(pTHX);*/ |
| 294 |
|
| 295 |
OP *%%%FUNC%%% (pTHX) |
| 296 |
{ |
| 297 |
register OP *nextop = (OP *)${$ops[0]}L; |
| 298 |
EOF |
| 299 |
|
| 300 |
for my $op (@ops) { |
| 301 |
my $name = $op->name; |
| 302 |
my $ppaddr = ppaddr $op->type; |
| 303 |
|
| 304 |
$source .= "op_$$op: /* $name */\n"; |
| 305 |
#$source .= "fprintf (stderr, \"$$op in op $name\\n\");\n";#d# |
| 306 |
#$source .= "{ dSP; sv_dump (TOPs); }\n";#d# |
| 307 |
|
| 308 |
unless (exists $flag{noasync}{$name}) { |
| 309 |
$source .= " PERL_ASYNC_CHECK ();\n"; |
| 310 |
} |
| 311 |
|
| 312 |
if (my $can = __PACKAGE__->can ("op_$name")) { |
| 313 |
$can->($op); |
| 314 |
} elsif (exists $flag{unsafe}{$name}) { |
| 315 |
$source .= " assert ((\"$name\", nextop == (OP *)$$op));\n";#d# |
| 316 |
$source .= " PL_op = nextop; return " . (callop $op) . ";\n"; |
| 317 |
} elsif ("LOGOP" eq B::class $op or exists $flag{otherop}{$name}) { |
| 318 |
$source .= " assert ((\"$name\", nextop == (OP *)$$op));\n";#d# |
| 319 |
$source .= " PL_op = nextop; nextop = " . (callop $op) . ";\n"; |
| 320 |
$source .= " if (nextop == (OP *)${$op->other}L) goto op_${$op->other};\n"; |
| 321 |
$source .= " assert ((\"$name\", nextop == (OP *)${$op->next}));\n";#d# |
| 322 |
$source .= ${$op->next} ? " goto op_${$op->next};\n" : " return 0;\n"; |
| 323 |
} else { |
| 324 |
$source .= " assert ((\"$name\", nextop == (OP *)$$op));\n";#d# |
| 325 |
$source .= " PL_op = nextop; nextop = " . (callop $op) . ";\n"; |
| 326 |
if ($name eq "entersub") { |
| 327 |
$source .= <<EOF; |
| 328 |
while (nextop != (OP *)${$op->next}) |
| 329 |
{ |
| 330 |
PERL_ASYNC_CHECK (); |
| 331 |
PL_op = nextop; nextop = (PL_op->op_ppaddr)(aTHX); |
| 332 |
} |
| 333 |
EOF |
| 334 |
} |
| 335 |
$source .= " assert ((\"$name\", nextop == (OP *)${$op->next}));\n";#d# |
| 336 |
$source .= ${$op->next} ? " goto op_${$op->next};\n" : " return 0;\n"; |
| 337 |
} |
| 338 |
} |
| 339 |
|
| 340 |
$source .= "}\n"; |
| 341 |
#warn $source; |
| 342 |
|
| 343 |
$source |
| 344 |
} |
| 345 |
|
| 346 |
sub source2ptr { |
| 347 |
my ($source) = @_; |
| 348 |
|
| 349 |
my $md5 = Digest::MD5::md5_hex $source; |
| 350 |
$source =~ s/%%%FUNC%%%/Faster_$md5/; |
| 351 |
|
| 352 |
my $stem = "/tmp/$md5"; |
| 353 |
|
| 354 |
unless (-e "$stem$_so") { |
| 355 |
open FILE, ">:raw", "$stem.c"; |
| 356 |
print FILE $source; |
| 357 |
close FILE; |
| 358 |
system "$COMPILE -o $stem$_o $stem.c"; |
| 359 |
system "$LINK -o $stem$_so $stem$_o $LIBS"; |
| 360 |
} |
| 361 |
|
| 362 |
# warn $source; |
| 363 |
my $so = DynaLoader::dl_load_file "$stem$_so" |
| 364 |
or die "$stem$_so: $!"; |
| 365 |
|
| 366 |
DynaLoader::dl_find_symbol $so, "Faster_$md5" |
| 367 |
or die "Faster_$md5: $!" |
| 368 |
} |
| 369 |
|
| 370 |
sub entersub { |
| 371 |
my ($cv) = @_; |
| 372 |
|
| 373 |
eval { |
| 374 |
my $source = cv2c $cv; |
| 375 |
|
| 376 |
my $ptr = source2ptr $source; |
| 377 |
|
| 378 |
patch_cv $cv, $ptr; |
| 379 |
}; |
| 380 |
|
| 381 |
warn $@ if $@; |
| 382 |
} |
| 383 |
|
| 384 |
hook_entersub; |
| 385 |
|
| 386 |
1; |
| 387 |
|
| 388 |
=back |
| 389 |
|
| 390 |
=head1 LIMITATIONS |
| 391 |
|
| 392 |
Tainting and debugging will disable Faster. |
| 393 |
|
| 394 |
=head1 AUTHOR |
| 395 |
|
| 396 |
Marc Lehmann <schmorp@schmorp.de> |
| 397 |
http://home.schmorp.de/ |
| 398 |
|
| 399 |
=cut |
| 400 |
|
