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 $oc = safer_open('opcode.h-new', 'opcode.h');
24 my $on = safer_open('opnames.h-new', 'opnames.h');
29 my (@ops, %desc, %check, %ckname, %flags, %args, %opnum);
31 open OPS, 'regen/opcodes' or die $!;
37 my ($key, $desc, $check, $flags, $args) = split(/\t+/, $_, 5);
38 $args = '' unless defined $args;
40 warn qq[Description "$desc" duplicates $seen{$desc}\n]
41 if $seen{$desc} and $key ne "transr";
42 die qq[Opcode "$key" duplicates $seen{$key}\n] if $seen{$key};
43 $seen{$desc} = qq[description of opcode "$key"];
44 $seen{$key} = qq[opcode "$key"];
49 $check{$key} = $check;
51 $flags{$key} = $flags;
59 # Format is "this function" => "does these op names"
61 Perl_do_kv => [qw( keys values )],
62 Perl_unimplemented_op => [qw(padany mapstart custom)],
63 # All the ops with a body of { return NORMAL; }
64 Perl_pp_null => [qw(scalar regcmaybe lineseq scope)],
66 Perl_pp_goto => ['dump'],
67 Perl_pp_require => ['dofile'],
68 Perl_pp_untie => ['dbmclose'],
69 Perl_pp_sysread => {read => '', recv => '#ifdef HAS_SOCKET'},
70 Perl_pp_sysseek => ['seek'],
71 Perl_pp_ioctl => ['fcntl'],
72 Perl_pp_ssockopt => {gsockopt => '#ifdef HAS_SOCKET'},
73 Perl_pp_getpeername => {getsockname => '#ifdef HAS_SOCKET'},
74 Perl_pp_stat => ['lstat'],
75 Perl_pp_ftrowned => [qw(fteowned ftzero ftsock ftchr ftblk
76 ftfile ftdir ftpipe ftsuid ftsgid
78 Perl_pp_fttext => ['ftbinary'],
79 Perl_pp_gmtime => ['localtime'],
80 Perl_pp_semget => [qw(shmget msgget)],
81 Perl_pp_semctl => [qw(shmctl msgctl)],
82 Perl_pp_ghostent => [qw(ghbyname ghbyaddr)],
83 Perl_pp_gnetent => [qw(gnbyname gnbyaddr)],
84 Perl_pp_gprotoent => [qw(gpbyname gpbynumber)],
85 Perl_pp_gservent => [qw(gsbyname gsbyport)],
86 Perl_pp_gpwent => [qw(gpwnam gpwuid)],
87 Perl_pp_ggrent => [qw(ggrnam ggrgid)],
88 Perl_pp_ftis => [qw(ftsize ftmtime ftatime ftctime)],
89 Perl_pp_chown => [qw(unlink chmod utime kill)],
90 Perl_pp_link => ['symlink'],
91 Perl_pp_ftrread => [qw(ftrwrite ftrexec fteread ftewrite
93 Perl_pp_shmwrite => [qw(shmread msgsnd msgrcv semop)],
94 Perl_pp_syswrite => {send => '#ifdef HAS_SOCKET'},
95 Perl_pp_defined => [qw(dor dorassign)],
96 Perl_pp_and => ['andassign'],
97 Perl_pp_or => ['orassign'],
98 Perl_pp_ucfirst => ['lcfirst'],
99 Perl_pp_sle => [qw(slt sgt sge)],
100 Perl_pp_print => ['say'],
101 Perl_pp_index => ['rindex'],
102 Perl_pp_oct => ['hex'],
103 Perl_pp_shift => ['pop'],
104 Perl_pp_sin => [qw(cos exp log sqrt)],
105 Perl_pp_bit_or => ['bit_xor'],
106 Perl_pp_rv2av => ['rv2hv'],
107 Perl_pp_akeys => ['avalues'],
108 Perl_pp_rkeys => [qw(rvalues reach)],
109 Perl_pp_trans => [qw(trans transr)],
110 Perl_pp_chop => [qw(chop chomp)],
111 Perl_pp_schop => [qw(schop schomp)],
112 Perl_pp_bind => {connect => '#ifdef HAS_SOCKET'},
113 Perl_pp_preinc => ['i_preinc'],
114 Perl_pp_predec => ['i_predec'],
115 Perl_pp_postinc => ['i_postinc'],
116 Perl_pp_postdec => ['i_postdec'],
117 Perl_pp_ehostent => [qw(enetent eprotoent eservent
118 spwent epwent sgrent egrent)],
119 Perl_pp_shostent => [qw(snetent sprotoent sservent)],
122 while (my ($func, $names) = splice @raw_alias, 0, 2) {
123 if (ref $names eq 'ARRAY') {
125 $alias{$_} = [$func, ''];
128 while (my ($opname, $cond) = each %$names) {
129 $alias{$opname} = [$func, $cond];
134 foreach my $sock_func (qw(socket bind listen accept shutdown
135 ssockopt getpeername)) {
136 $alias{$sock_func} = ["Perl_pp_$sock_func", '#ifdef HAS_SOCKET'],
141 print $oc read_only_top(lang => 'C', by => 'regen/opcode.pl', from => 'its data',
142 file => 'opcode.h', style => '*',
143 copyright => [1993 .. 2007]),
144 "#ifndef PERL_GLOBAL_STRUCT_INIT\n\n";
151 if (@unimplemented) {
153 foreach (@unimplemented) {
154 print $oc "#define $_ Perl_unimplemented_op\n";
156 print $oc "#endif\n";
163 my ($impl, $cond) = @{$alias{$_} || ["Perl_pp_$_", '']};
164 my $op_func = "Perl_pp_$_";
166 if ($cond ne $last_cond) {
167 # A change in condition. (including to or from no condition)
171 print $oc "$last_cond\n";
174 push @unimplemented, $op_func if $last_cond;
175 print $oc "#define $op_func $impl\n" if $impl ne $op_func;
177 # If the last op was conditional, we need to close it out:
181 print $on read_only_top(lang => 'C', by => 'regen/opcode.pl',
182 from => 'its data', style => '*',
183 file => 'opnames.h', copyright => [1999 .. 2008]),
184 "typedef enum opcode {\n";
188 print $on "\t", tab(3,"OP_\U$_"), " = ", $i++, ",\n";
190 print $on "\t", tab(3,"OP_max"), "\n";
191 print $on "} opcode;\n";
192 print $on "\n#define MAXO ", scalar @ops, "\n";
194 # Emit op names and descriptions.
200 EXTCONST char* const PL_op_name[];
202 EXTCONST char* const PL_op_name[] = {
206 print $oc qq(\t"$_",\n);
214 EXTCONST char* const PL_op_desc[];
216 EXTCONST char* const PL_op_desc[] = {
220 my($safe_desc) = $desc{$_};
222 # Have to escape double quotes and escape characters.
223 $safe_desc =~ s/([\\"])/\\$1/g;
225 print $oc qq(\t"$safe_desc",\n);
234 #endif /* !PERL_GLOBAL_STRUCT_INIT */
237 # Emit ppcode switch array.
243 #ifdef PERL_GLOBAL_STRUCT_INIT
244 # define PERL_PPADDR_INITED
245 static const Perl_ppaddr_t Gppaddr[]
247 # ifndef PERL_GLOBAL_STRUCT
248 # define PERL_PPADDR_INITED
249 EXT Perl_ppaddr_t PL_ppaddr[] /* or perlvars.h */
251 #endif /* PERL_GLOBAL_STRUCT */
252 #if (defined(DOINIT) && !defined(PERL_GLOBAL_STRUCT)) || defined(PERL_GLOBAL_STRUCT_INIT)
253 # define PERL_PPADDR_INITED
258 my $op_func = "Perl_pp_$_";
259 my $name = $alias{$_};
260 if ($name && $name->[0] ne $op_func) {
261 print $oc "\t$op_func,\t/* implemented by $name->[0] */\n";
264 print $oc "\t$op_func,\n";
271 #ifdef PERL_PPADDR_INITED
275 #ifdef PERL_GLOBAL_STRUCT_INIT
276 # define PERL_CHECK_INITED
277 static const Perl_check_t Gcheck[]
279 # ifndef PERL_GLOBAL_STRUCT
280 # define PERL_CHECK_INITED
281 EXT Perl_check_t PL_check[] /* or perlvars.h */
284 #if (defined(DOINIT) && !defined(PERL_GLOBAL_STRUCT)) || defined(PERL_GLOBAL_STRUCT_INIT)
285 # define PERL_CHECK_INITED
290 print $oc "\t", tab(3, "Perl_$check{$_},"), "\t/* $_ */\n";
296 #ifdef PERL_CHECK_INITED
298 #endif /* #ifdef PERL_CHECK_INITED */
300 #ifndef PERL_GLOBAL_STRUCT_INIT
303 EXTCONST U32 PL_opargs[];
305 EXTCONST U32 PL_opargs[] = {
308 # Emit allowed argument types.
315 'A', 3, # array value
319 'R', 7, # scalar reference
329 '$', 6, # svop_or_padop
331 '"', 8, # pvop_or_svop
334 '%', 11, # baseop_or_unop
335 '-', 12, # filestatop
340 'm' => 1, # needs stack mark
341 'f' => 2, # fold constants
342 's' => 4, # always produces scalar
343 't' => 8, # needs target scalar
344 'T' => 8 | 16, # ... which may be lexical
345 'i' => 0, # always produces integer (unused since e7311069)
346 'I' => 32, # has corresponding int op
347 'd' => 64, # danger, unknown side effects
348 'u' => 128, # defaults to $_
359 my $flags = $flags{$op};
360 for my $flag (keys %opflags) {
361 if ($flags =~ s/$flag//) {
362 die "Flag collision for '$op' ($flags{$op}, $flag)\n"
363 if $argsum & $opflags{$flag};
364 $argsum |= $opflags{$flag};
367 die qq[Opcode '$op' has no class indicator ($flags{$op} => $flags)\n]
368 unless exists $opclass{$flags};
369 $argsum |= $opclass{$flags} << $OCSHIFT;
370 my $argshift = $OASHIFT;
371 for my $arg (split(' ',$args{$op})) {
373 # record opnums of these opnames
374 $OP_IS_SOCKET{$op} = $opnum{$op} if $arg =~ s/s//;
375 $OP_IS_FILETEST{$op} = $opnum{$op} if $arg =~ s/-//;
376 $OP_IS_FT_ACCESS{$op} = $opnum{$op} if $arg =~ s/\+//;
378 my $argnum = ($arg =~ s/\?//) ? 8 : 0;
379 die "op = $op, arg = $arg\n"
380 unless exists $argnum{$arg};
381 $argnum += $argnum{$arg};
382 die "Argument overflow for '$op'\n"
383 if $argshift >= $ARGBITS ||
384 $argnum > ((1 << ($ARGBITS - $argshift)) - 1);
385 $argsum += $argnum << $argshift;
388 $argsum = sprintf("0x%08x", $argsum);
389 print $oc "\t", tab(3, "$argsum,"), "/* $op */\n";
396 #endif /* !PERL_GLOBAL_STRUCT_INIT */
401 # Emit OP_IS_* macros
403 print $on <<'EO_OP_IS_COMMENT';
405 /* the OP_IS_(SOCKET|FILETEST) macros are optimized to a simple range
406 check because all the member OPs are contiguous in opcode.pl
407 <OPS> table. opcode.pl verifies the range contiguity. */
410 gen_op_is_macro( \%OP_IS_SOCKET, 'OP_IS_SOCKET');
411 gen_op_is_macro( \%OP_IS_FILETEST, 'OP_IS_FILETEST');
412 gen_op_is_macro( \%OP_IS_FT_ACCESS, 'OP_IS_FILETEST_ACCESS');
414 sub gen_op_is_macro {
415 my ($op_is, $macname) = @_;
418 # get opnames whose numbers are lowest and highest
419 my ($first, @rest) = sort {
420 $op_is->{$a} <=> $op_is->{$b}
423 my $last = pop @rest; # @rest slurped, get its last
424 die "Invalid range of ops: $first .. $last\n" unless $last;
426 print $on "\n#define $macname(op) \\\n\t(";
428 # verify that op-ct matches 1st..last range (and fencepost)
429 # (we know there are no dups)
430 if ( $op_is->{$last} - $op_is->{$first} == scalar @rest + 1) {
432 # contiguous ops -> optimized version
433 print $on "(op) >= OP_" . uc($first) . " && (op) <= OP_" . uc($last);
437 print $on join(" || \\\n\t ",
438 map { "(op) == OP_" . uc() } sort keys %$op_is);
444 my $pp = safer_open('pp_proto.h-new', 'pp_proto.h');
446 print $pp read_only_top(lang => 'C', by => 'opcode.pl', from => 'its data');
451 my $name = $alias{$_} ? $alias{$_}[0] : "Perl_pp_$_";
454 print $pp "PERL_CALLCONV OP *$_(pTHX);\n" foreach sort keys %funcs;
456 foreach ($oc, $on, $pp) {
457 read_only_bottom_close_and_rename($_);
460 # Some comments about 'T' opcode classifier:
462 # Safe to set if the ppcode uses:
463 # tryAMAGICbin, tryAMAGICun, SETn, SETi, SETu, PUSHn, PUSHTARG, SETTARG,
464 # SETs(TARG), XPUSHn, XPUSHu,
466 # Unsafe to set if the ppcode uses dTARG or [X]RETPUSH[YES|NO|UNDEF]
468 # lt and friends do SETs (including ncmp, but not scmp)
470 # Additional mode of failure: the opcode can modify TARG before it "used"
471 # all the arguments (or may call an external function which does the same).
472 # If the target coincides with one of the arguments ==> kaboom.
474 # pp.c pos substr each not OK (RETPUSHUNDEF)
475 # substr vec also not OK due to LV to target (are they???)
476 # ref not OK (RETPUSHNO)
477 # trans not OK (dTARG; TARG = sv_newmortal();)
478 # ucfirst etc not OK: TMP arg processed inplace
479 # quotemeta not OK (unsafe when TARG == arg)
480 # each repeat not OK too due to list context
481 # pack split - unknown whether they are safe
482 # sprintf: is calling do_sprintf(TARG,...) which can act on TARG
483 # before other args are processed.
485 # Suspicious wrt "additional mode of failure" (and only it):
486 # schop, chop, postinc/dec, bit_and etc, negate, complement.
488 # Also suspicious: 4-arg substr, sprintf, uc/lc (POK_only), reverse, pack.
490 # substr/vec: doing TAINT_off()???
493 # readline - unknown whether it is safe
494 # match subst not OK (dTARG)
495 # grepwhile not OK (not always setting)
496 # join not OK (unsafe when TARG == arg)
498 # Suspicious wrt "additional mode of failure": concat (dealt with
499 # in ck_sassign()), join (same).
502 # mapwhile flip caller not OK (not always setting)
505 # backtick glob warn die not OK (not always setting)
506 # warn not OK (RETPUSHYES)
507 # open fileno getc sysread syswrite ioctl accept shutdown
508 # ftsize(etc) readlink telldir fork alarm getlogin not OK (RETPUSHUNDEF)
509 # umask select not OK (XPUSHs(&PL_sv_undef);)
510 # fileno getc sysread syswrite tell not OK (meth("FILENO" "GETC"))
511 # sselect shm* sem* msg* syscall - unknown whether they are safe
512 # gmtime not OK (list context)
514 # Suspicious wrt "additional mode of failure": warn, die, select.