3 # Regenerate (overwriting only if changed):
9 # from information stored in regen/opcodes, plus the
10 # values hardcoded into this script in @raw_alias.
12 # Accepts the standard regen_lib -q and -v args.
14 # This script is normally invoked from regen.pl.
19 # Get function prototypes
20 require 'regen/regen_lib.pl';
23 my $opcode_new = 'opcode.h-new';
24 my $opname_new = 'opnames.h-new';
25 my $oc = safer_open($opcode_new);
26 my $on = safer_open($opname_new);
32 my (@ops, %desc, %check, %ckname, %flags, %args, %opnum);
34 open OPS, 'regen/opcodes' or die $!;
40 my ($key, $desc, $check, $flags, $args) = split(/\t+/, $_, 5);
41 $args = '' unless defined $args;
43 warn qq[Description "$desc" duplicates $seen{$desc}\n]
44 if $seen{$desc} and $key ne "transr";
45 die qq[Opcode "$key" duplicates $seen{$key}\n] if $seen{$key};
46 $seen{$desc} = qq[description of opcode "$key"];
47 $seen{$key} = qq[opcode "$key"];
52 $check{$key} = $check;
54 $flags{$key} = $flags;
62 # Format is "this function" => "does these op names"
64 Perl_do_kv => [qw( keys values )],
65 Perl_unimplemented_op => [qw(padany mapstart custom)],
66 # All the ops with a body of { return NORMAL; }
67 Perl_pp_null => [qw(scalar regcmaybe lineseq scope)],
69 Perl_pp_goto => ['dump'],
70 Perl_pp_require => ['dofile'],
71 Perl_pp_untie => ['dbmclose'],
72 Perl_pp_sysread => {read => '', recv => '#ifdef HAS_SOCKET'},
73 Perl_pp_sysseek => ['seek'],
74 Perl_pp_ioctl => ['fcntl'],
75 Perl_pp_ssockopt => {gsockopt => '#ifdef HAS_SOCKET'},
76 Perl_pp_getpeername => {getsockname => '#ifdef HAS_SOCKET'},
77 Perl_pp_stat => ['lstat'],
78 Perl_pp_ftrowned => [qw(fteowned ftzero ftsock ftchr ftblk
79 ftfile ftdir ftpipe ftsuid ftsgid
81 Perl_pp_fttext => ['ftbinary'],
82 Perl_pp_gmtime => ['localtime'],
83 Perl_pp_semget => [qw(shmget msgget)],
84 Perl_pp_semctl => [qw(shmctl msgctl)],
85 Perl_pp_ghostent => [qw(ghbyname ghbyaddr)],
86 Perl_pp_gnetent => [qw(gnbyname gnbyaddr)],
87 Perl_pp_gprotoent => [qw(gpbyname gpbynumber)],
88 Perl_pp_gservent => [qw(gsbyname gsbyport)],
89 Perl_pp_gpwent => [qw(gpwnam gpwuid)],
90 Perl_pp_ggrent => [qw(ggrnam ggrgid)],
91 Perl_pp_ftis => [qw(ftsize ftmtime ftatime ftctime)],
92 Perl_pp_chown => [qw(unlink chmod utime kill)],
93 Perl_pp_link => ['symlink'],
94 Perl_pp_ftrread => [qw(ftrwrite ftrexec fteread ftewrite
96 Perl_pp_shmwrite => [qw(shmread msgsnd msgrcv semop)],
97 Perl_pp_syswrite => {send => '#ifdef HAS_SOCKET'},
98 Perl_pp_defined => [qw(dor dorassign)],
99 Perl_pp_and => ['andassign'],
100 Perl_pp_or => ['orassign'],
101 Perl_pp_ucfirst => ['lcfirst'],
102 Perl_pp_sle => [qw(slt sgt sge)],
103 Perl_pp_print => ['say'],
104 Perl_pp_index => ['rindex'],
105 Perl_pp_oct => ['hex'],
106 Perl_pp_shift => ['pop'],
107 Perl_pp_sin => [qw(cos exp log sqrt)],
108 Perl_pp_bit_or => ['bit_xor'],
109 Perl_pp_rv2av => ['rv2hv'],
110 Perl_pp_akeys => ['avalues'],
111 Perl_pp_rkeys => [qw(rvalues reach)],
112 Perl_pp_trans => [qw(trans transr)],
113 Perl_pp_chop => [qw(chop chomp)],
114 Perl_pp_schop => [qw(schop schomp)],
115 Perl_pp_bind => {connect => '#ifdef HAS_SOCKET'},
116 Perl_pp_preinc => ['i_preinc'],
117 Perl_pp_predec => ['i_predec'],
118 Perl_pp_postinc => ['i_postinc'],
119 Perl_pp_postdec => ['i_postdec'],
120 Perl_pp_ehostent => [qw(enetent eprotoent eservent
121 spwent epwent sgrent egrent)],
122 Perl_pp_shostent => [qw(snetent sprotoent sservent)],
125 while (my ($func, $names) = splice @raw_alias, 0, 2) {
126 if (ref $names eq 'ARRAY') {
128 $alias{$_} = [$func, ''];
131 while (my ($opname, $cond) = each %$names) {
132 $alias{$opname} = [$func, $cond];
137 foreach my $sock_func (qw(socket bind listen accept shutdown
138 ssockopt getpeername)) {
139 $alias{$sock_func} = ["Perl_pp_$sock_func", '#ifdef HAS_SOCKET'],
144 print read_only_top(lang => 'C', by => 'regen/opcode.pl', from => 'its data',
145 file => 'opcode.h', style => '*',
146 copyright => [1993 .. 2007]),
147 "#ifndef PERL_GLOBAL_STRUCT_INIT\n\n";
154 if (@unimplemented) {
156 foreach (@unimplemented) {
157 print "#define $_ Perl_unimplemented_op\n";
166 my ($impl, $cond) = @{$alias{$_} || ["Perl_pp_$_", '']};
167 my $op_func = "Perl_pp_$_";
169 if ($cond ne $last_cond) {
170 # A change in condition. (including to or from no condition)
174 print "$last_cond\n";
177 push @unimplemented, $op_func if $last_cond;
178 print "#define $op_func $impl\n" if $impl ne $op_func;
180 # If the last op was conditional, we need to close it out:
184 print $on read_only_top(lang => 'C', by => 'regen/opcode.pl',
185 from => 'its data', style => '*',
186 file => 'opnames.h', copyright => [1999 .. 2008]),
187 "typedef enum opcode {\n";
191 print $on "\t", &tab(3,"OP_\U$_"), " = ", $i++, ",\n";
193 print $on "\t", &tab(3,"OP_max"), "\n";
194 print $on "} opcode;\n";
195 print $on "\n#define MAXO ", scalar @ops, "\n";
197 # Emit op names and descriptions.
203 EXTCONST char* const PL_op_name[];
205 EXTCONST char* const PL_op_name[] = {
220 EXTCONST char* const PL_op_desc[];
222 EXTCONST char* const PL_op_desc[] = {
226 my($safe_desc) = $desc{$_};
228 # Have to escape double quotes and escape characters.
229 $safe_desc =~ s/([\\"])/\\$1/g;
231 print qq(\t"$safe_desc",\n);
240 #endif /* !PERL_GLOBAL_STRUCT_INIT */
243 # Emit ppcode switch array.
249 #ifdef PERL_GLOBAL_STRUCT_INIT
250 # define PERL_PPADDR_INITED
251 static const Perl_ppaddr_t Gppaddr[]
253 # ifndef PERL_GLOBAL_STRUCT
254 # define PERL_PPADDR_INITED
255 EXT Perl_ppaddr_t PL_ppaddr[] /* or perlvars.h */
257 #endif /* PERL_GLOBAL_STRUCT */
258 #if (defined(DOINIT) && !defined(PERL_GLOBAL_STRUCT)) || defined(PERL_GLOBAL_STRUCT_INIT)
259 # define PERL_PPADDR_INITED
264 my $op_func = "Perl_pp_$_";
265 my $name = $alias{$_};
266 if ($name && $name->[0] ne $op_func) {
267 print "\t$op_func,\t/* implemented by $name->[0] */\n";
270 print "\t$op_func,\n";
277 #ifdef PERL_PPADDR_INITED
283 # Emit check routines.
286 #ifdef PERL_GLOBAL_STRUCT_INIT
287 # define PERL_CHECK_INITED
288 static const Perl_check_t Gcheck[]
290 # ifndef PERL_GLOBAL_STRUCT
291 # define PERL_CHECK_INITED
292 EXT Perl_check_t PL_check[] /* or perlvars.h */
295 #if (defined(DOINIT) && !defined(PERL_GLOBAL_STRUCT)) || defined(PERL_GLOBAL_STRUCT_INIT)
296 # define PERL_CHECK_INITED
301 print "\t", &tab(3, "Perl_$check{$_},"), "\t/* $_ */\n";
307 #ifdef PERL_CHECK_INITED
309 #endif /* #ifdef PERL_CHECK_INITED */
313 # Emit allowed argument types.
318 #ifndef PERL_GLOBAL_STRUCT_INIT
321 EXTCONST U32 PL_opargs[];
323 EXTCONST U32 PL_opargs[] = {
329 'A', 3, # array value
333 'R', 7, # scalar reference
343 '$', 6, # svop_or_padop
345 '"', 8, # pvop_or_svop
348 '%', 11, # baseop_or_unop
349 '-', 12, # filestatop
354 'm' => 1, # needs stack mark
355 'f' => 2, # fold constants
356 's' => 4, # always produces scalar
357 't' => 8, # needs target scalar
358 'T' => 8 | 16, # ... which may be lexical
359 'i' => 0, # always produces integer (unused since e7311069)
360 'I' => 32, # has corresponding int op
361 'd' => 64, # danger, unknown side effects
362 'u' => 128, # defaults to $_
373 my $flags = $flags{$op};
374 for my $flag (keys %opflags) {
375 if ($flags =~ s/$flag//) {
376 die "Flag collision for '$op' ($flags{$op}, $flag)\n"
377 if $argsum & $opflags{$flag};
378 $argsum |= $opflags{$flag};
381 die qq[Opcode '$op' has no class indicator ($flags{$op} => $flags)\n]
382 unless exists $opclass{$flags};
383 $argsum |= $opclass{$flags} << $OCSHIFT;
384 my $argshift = $OASHIFT;
385 for my $arg (split(' ',$args{$op})) {
387 # record opnums of these opnames
388 $OP_IS_SOCKET{$op} = $opnum{$op} if $arg =~ s/s//;
389 $OP_IS_FILETEST{$op} = $opnum{$op} if $arg =~ s/-//;
390 $OP_IS_FT_ACCESS{$op} = $opnum{$op} if $arg =~ s/\+//;
392 my $argnum = ($arg =~ s/\?//) ? 8 : 0;
393 die "op = $op, arg = $arg\n"
394 unless exists $argnum{$arg};
395 $argnum += $argnum{$arg};
396 die "Argument overflow for '$op'\n"
397 if $argshift >= $ARGBITS ||
398 $argnum > ((1 << ($ARGBITS - $argshift)) - 1);
399 $argsum += $argnum << $argshift;
402 $argsum = sprintf("0x%08x", $argsum);
403 print "\t", &tab(3, "$argsum,"), "/* $op */\n";
410 #endif /* !PERL_GLOBAL_STRUCT_INIT */
416 # Emit OP_IS_* macros
418 print $on <<EO_OP_IS_COMMENT;
420 /* the OP_IS_(SOCKET|FILETEST) macros are optimized to a simple range
421 check because all the member OPs are contiguous in opcode.pl
422 <OPS> table. opcode.pl verifies the range contiguity. */
426 gen_op_is_macro( \%OP_IS_SOCKET, 'OP_IS_SOCKET');
427 gen_op_is_macro( \%OP_IS_FILETEST, 'OP_IS_FILETEST');
428 gen_op_is_macro( \%OP_IS_FT_ACCESS, 'OP_IS_FILETEST_ACCESS');
430 sub gen_op_is_macro {
431 my ($op_is, $macname) = @_;
434 # get opnames whose numbers are lowest and highest
435 my ($first, @rest) = sort {
436 $op_is->{$a} <=> $op_is->{$b}
439 my $last = pop @rest; # @rest slurped, get its last
440 die "Invalid range of ops: $first .. $last\n" unless $last;
442 print $on "#define $macname(op) \\\n\t(";
444 # verify that op-ct matches 1st..last range (and fencepost)
445 # (we know there are no dups)
446 if ( $op_is->{$last} - $op_is->{$first} == scalar @rest + 1) {
448 # contiguous ops -> optimized version
449 print $on "(op) >= OP_" . uc($first) . " && (op) <= OP_" . uc($last);
453 print $on join(" || \\\n\t ",
454 map { "(op) == OP_" . uc() } sort keys %$op_is);
461 print $_ "/* ex: set ro: */\n";
465 rename_if_different $opcode_new, 'opcode.h';
466 rename_if_different $opname_new, 'opnames.h';
468 my $pp_proto_new = 'pp_proto.h-new';
470 my $pp = safer_open($pp_proto_new);
472 print $pp read_only_top(lang => 'C', by => 'opcode.pl', from => 'its data');
477 my $name = $alias{$_} ? $alias{$_}[0] : "Perl_pp_$_";
480 print $pp "PERL_CALLCONV OP *$_(pTHX);\n" foreach sort keys %funcs;
482 print $pp "\n/* ex: set ro: */\n";
486 rename_if_different $pp_proto_new, 'pp_proto.h';
489 foreach ('opcode.h', 'opnames.h', 'pp_proto.h') {
490 1 while unlink "$_-old";
494 ###########################################################################
497 $t .= "\t" x ($l - (length($t) + 1) / 8);
500 ###########################################################################
502 # Some comments about 'T' opcode classifier:
504 # Safe to set if the ppcode uses:
505 # tryAMAGICbin, tryAMAGICun, SETn, SETi, SETu, PUSHn, PUSHTARG, SETTARG,
506 # SETs(TARG), XPUSHn, XPUSHu,
508 # Unsafe to set if the ppcode uses dTARG or [X]RETPUSH[YES|NO|UNDEF]
510 # lt and friends do SETs (including ncmp, but not scmp)
512 # Additional mode of failure: the opcode can modify TARG before it "used"
513 # all the arguments (or may call an external function which does the same).
514 # If the target coincides with one of the arguments ==> kaboom.
516 # pp.c pos substr each not OK (RETPUSHUNDEF)
517 # substr vec also not OK due to LV to target (are they???)
518 # ref not OK (RETPUSHNO)
519 # trans not OK (dTARG; TARG = sv_newmortal();)
520 # ucfirst etc not OK: TMP arg processed inplace
521 # quotemeta not OK (unsafe when TARG == arg)
522 # each repeat not OK too due to list context
523 # pack split - unknown whether they are safe
524 # sprintf: is calling do_sprintf(TARG,...) which can act on TARG
525 # before other args are processed.
527 # Suspicious wrt "additional mode of failure" (and only it):
528 # schop, chop, postinc/dec, bit_and etc, negate, complement.
530 # Also suspicious: 4-arg substr, sprintf, uc/lc (POK_only), reverse, pack.
532 # substr/vec: doing TAINT_off()???
535 # readline - unknown whether it is safe
536 # match subst not OK (dTARG)
537 # grepwhile not OK (not always setting)
538 # join not OK (unsafe when TARG == arg)
540 # Suspicious wrt "additional mode of failure": concat (dealt with
541 # in ck_sassign()), join (same).
544 # mapwhile flip caller not OK (not always setting)
547 # backtick glob warn die not OK (not always setting)
548 # warn not OK (RETPUSHYES)
549 # open fileno getc sysread syswrite ioctl accept shutdown
550 # ftsize(etc) readlink telldir fork alarm getlogin not OK (RETPUSHUNDEF)
551 # umask select not OK (XPUSHs(&PL_sv_undef);)
552 # fileno getc sysread syswrite tell not OK (meth("FILENO" "GETC"))
553 # sselect shm* sem* msg* syscall - unknown whether they are safe
554 # gmtime not OK (list context)
556 # Suspicious wrt "additional mode of failure": warn, die, select.