forked from Perl/perl5
-
Notifications
You must be signed in to change notification settings - Fork 1
/
op.h
1155 lines (969 loc) · 39.6 KB
/
op.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* op.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* The fields of BASEOP are:
* op_next Pointer to next ppcode to execute after this one.
* (Top level pre-grafted op points to first op,
* but this is replaced when op is grafted in, when
* this op will point to the real next op, and the new
* parent takes over role of remembering starting op.)
* op_sibparent Pointer to the op's next sibling, or to the parent
* if there are no more siblings.
* op_ppaddr Pointer to current ppcode's function.
* op_targ An index into the current pad, identifying an SV
* that is typically used to store the OP's result
* (such as a lexical variable, or a SVs_PADTMP
* temporary intermediate value).
* op_type The type of the operation.
* op_opt Whether or not the op has been optimised by the
* peephole optimiser.
* op_slabbed allocated via opslab
* op_static tell op_free() to skip PerlMemShared_free(), when
* !op_slabbed.
* op_savefree on savestack via SAVEFREEOP
* op_folded Result/remainder of a constant fold operation.
* op_moresib this op is not the last sibling
* op_spare One spare bit
* op_flags Flags common to all operations. See OPf_* below.
* op_private Flags peculiar to a particular operation (BUT,
* by default, set to the number of children until
* the operation is privatized by a check routine,
* which may or may not check number of children).
*/
#include "op_reg_common.h"
#define OPCODE U16
typedef PERL_BITFIELD16 Optype;
#ifdef BASEOP_DEFINITION
#define BASEOP BASEOP_DEFINITION
#else
#define BASEOP \
OP* op_next; \
OP* op_sibparent; \
OP* (*op_ppaddr)(pTHX); \
PADOFFSET op_targ; \
PERL_BITFIELD16 op_type:9; \
PERL_BITFIELD16 op_opt:1; \
PERL_BITFIELD16 op_slabbed:1; \
PERL_BITFIELD16 op_savefree:1; \
PERL_BITFIELD16 op_static:1; \
PERL_BITFIELD16 op_folded:1; \
PERL_BITFIELD16 op_moresib:1; \
PERL_BITFIELD16 op_spare:1; \
U8 op_flags; \
U8 op_private;
#endif
/* If op_type:9 is changed to :10, also change cx_pusheval()
Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
then all the other bit-fields before/after it should change their
types too to let VC pack them into the same 4 byte integer.*/
/* for efficiency, requires OPf_WANT_VOID == G_VOID etc */
#define OP_GIMME(op,dfl) \
(((op)->op_flags & OPf_WANT) ? ((op)->op_flags & OPf_WANT) : dfl)
#define OP_GIMME_REVERSE(flags) ((flags) & G_WANT)
/*
=for apidoc_section $callback
=for apidoc Amn|U32|GIMME_V
The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
C<G_SCALAR> or C<G_LIST> for void, scalar or list context,
respectively. See L<perlcall> for a usage example.
=for apidoc AmnD|U32|GIMME
A backward-compatible version of C<GIMME_V> which can only return
C<G_SCALAR> or C<G_LIST>; in a void context, it returns C<G_SCALAR>.
Deprecated. Use C<GIMME_V> instead.
=cut
*/
#define GIMME_V Perl_gimme_V(aTHX)
/* Public flags */
#define OPf_WANT 3 /* Mask for "want" bits: */
#define OPf_WANT_VOID 1 /* Want nothing */
#define OPf_WANT_SCALAR 2 /* Want single value */
#define OPf_WANT_LIST 3 /* Want list of any length */
#define OPf_KIDS 4 /* There is a firstborn child. */
#define OPf_PARENS 8 /* This operator was parenthesized. */
/* (Or block needs explicit scope entry.) */
#define OPf_REF 16 /* Certified reference. */
/* (Return container, not containee). */
#define OPf_MOD 32 /* Will modify (lvalue). */
#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
/* Indicates mutator-variant of op for those
* ops which support them, e.g. $x += 1
*/
#define OPf_SPECIAL 128 /* Do something weird for this op: */
/* On local LVAL, don't init local value. */
/* On OP_SORT, subroutine is inlined. */
/* On OP_NOT, inversion was implicit. */
/* On OP_LEAVE, don't restore curpm, e.g.
* /(...)/ while ...>; */
/* On truncate, we truncate filehandle */
/* On control verbs, we saw no label */
/* On flipflop, we saw ... instead of .. */
/* On UNOPs, saw bare parens, e.g. eof(). */
/* On OP_CHDIR, handle (or bare parens) */
/* On OP_NULL, saw a "do". */
/* On OP_EXISTS, treat av as av, not avhv. */
/* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
/* On regcomp, "use re 'eval'" was in scope */
/* On RV2[ACGHS]V, don't create GV--in
defined()*/
/* On OP_DBSTATE, indicates breakpoint
* (runtime property) */
/* On OP_REQUIRE, was seen as CORE::require */
/* On OP_(ENTER|LEAVE)WHEN, there's
no condition */
/* On OP_SMARTMATCH, an implicit smartmatch */
/* On OP_ANONHASH and OP_ANONLIST, create a
reference to the new anon hash or array */
/* On OP_HELEM, OP_MULTIDEREF and OP_HSLICE,
localization will be followed by assignment,
so do not wipe the target if it is special
(e.g. a glob or a magic SV) */
/* On OP_MATCH, OP_SUBST & OP_TRANS, the
operand of a logical or conditional
that was optimised away, so it should
not be bound via =~ */
/* On OP_CONST, from a constant CV */
/* On OP_GLOB, two meanings:
- Before ck_glob, called as CORE::glob
- After ck_glob, use Perl glob function
*/
/* On OP_PADRANGE, push @_ */
/* On OP_DUMP, has no label */
/* On OP_UNSTACK, in a C-style for loop */
/* On OP_READLINE, it's for <<>>, not <> */
/* There is no room in op_flags for this one, so it has its own bit-
field member (op_folded) instead. The flag is only used to tell
op_convert_list to set op_folded. */
#define OPf_FOLDED (1<<16)
/* old names; don't use in new code, but don't break them, either */
#define OPf_LIST OPf_WANT_LIST
#define OPf_KNOW OPf_WANT
#if !defined(PERL_CORE) && !defined(PERL_EXT)
# define GIMME \
(PL_op->op_flags & OPf_WANT \
? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
? G_LIST \
: G_SCALAR) \
: dowantarray())
#endif
/* NOTE: OPp* flags are now auto-generated and defined in opcode.h,
* from data in regen/op_private */
#define OPpTRANS_ALL (OPpTRANS_USE_SVOP|OPpTRANS_CAN_FORCE_UTF8|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)
#define OPpTRANS_FROM_UTF OPpTRANS_USE_SVOP
#define OPpTRANS_TO_UTF OPpTRANS_CAN_FORCE_UTF8
/* Mask for OP_ENTERSUB flags, the absence of which must be propagated
in dynamic context */
#define OPpENTERSUB_LVAL_MASK (OPpLVAL_INTRO|OPpENTERSUB_INARGS)
/* things that can be elements of op_aux */
typedef union {
PADOFFSET pad_offset;
SV *sv;
IV iv;
UV uv;
char *pv;
SSize_t ssize;
} UNOP_AUX_item;
#ifdef USE_ITHREADS
# define UNOP_AUX_item_sv(item) PAD_SVl((item)->pad_offset);
#else
# define UNOP_AUX_item_sv(item) ((item)->sv);
#endif
struct op {
BASEOP
};
struct unop {
BASEOP
OP * op_first;
};
struct unop_aux {
BASEOP
OP *op_first;
UNOP_AUX_item *op_aux;
};
struct binop {
BASEOP
OP * op_first;
OP * op_last;
};
struct logop {
BASEOP
OP * op_first;
/* Note that op->op_other is the *next* op in execution order of the
* alternate branch, not the root of the subtree. I.e. imagine it being
* called ->op_otherfirst.
* To find the structural subtree root (what could be called
* ->op_otherroot), use OpSIBLING of ->op_first */
OP * op_other;
};
struct listop {
BASEOP
OP * op_first;
OP * op_last;
};
struct methop {
BASEOP
union {
/* op_u.op_first *must* be aligned the same as the op_first
* field of the other op types, and op_u.op_meth_sv *must*
* be aligned with op_sv */
OP* op_first; /* optree for method name */
SV* op_meth_sv; /* static method name */
} op_u;
#ifdef USE_ITHREADS
PADOFFSET op_rclass_targ; /* pad index for redirect class */
#else
SV* op_rclass_sv; /* static redirect class $o->A::meth() */
#endif
};
struct pmop {
BASEOP
OP * op_first;
OP * op_last;
#ifdef USE_ITHREADS
PADOFFSET op_pmoffset;
#else
REGEXP * op_pmregexp; /* compiled expression */
#endif
U32 op_pmflags;
union {
OP * op_pmreplroot; /* For OP_SUBST */
PADOFFSET op_pmtargetoff; /* For OP_SPLIT lex ary or thr GV */
GV * op_pmtargetgv; /* For OP_SPLIT non-threaded GV */
} op_pmreplrootu;
union {
OP * op_pmreplstart; /* Only used in OP_SUBST */
#ifdef USE_ITHREADS
PADOFFSET op_pmstashoff; /* Only used in OP_MATCH, with PMf_ONCE set */
#else
HV * op_pmstash;
#endif
} op_pmstashstartu;
OP * op_code_list; /* list of (?{}) code blocks */
};
#ifdef USE_ITHREADS
#define PM_GETRE(o) (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
/* The assignment is just to enforce type safety (or at least get a warning).
*/
/* With first class regexps not via a reference one needs to assign
&PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
is cheaper. I guess we could allow NULL, but the check above would get
more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
/* BEWARE - something that calls this macro passes (r) which has a side
effect. */
#define PM_SETRE(o,r) STMT_START { \
REGEXP *const _pm_setre = (r); \
assert(_pm_setre); \
PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
} STMT_END
#else
#define PM_GETRE(o) ((o)->op_pmregexp)
#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
#endif
/* Currently these PMf flags occupy a single 32-bit word. Not all bits are
* currently used. The lower bits are shared with their corresponding RXf flag
* bits, up to but not including _RXf_PMf_SHIFT_NEXT. The unused bits
* immediately follow; finally the used Pmf-only (unshared) bits, so that the
* highest bit in the word is used. This gathers all the unused bits as a pool
* in the middle, like so: 11111111111111110000001111111111
* where the '1's represent used bits, and the '0's unused. This design allows
* us to allocate off one end of the pool if we need to add a shared bit, and
* off the other end if we need a non-shared bit, without disturbing the other
* bits. This maximizes the likelihood of being able to change things without
* breaking binary compatibility.
*
* To add shared bits, do so in op_reg_common.h. This should change
* _RXf_PMf_SHIFT_NEXT so that things won't compile. Then come to regexp.h and
* op.h and adjust the constant adders in the definitions of PMf_BASE_SHIFT and
* Pmf_BASE_SHIFT down by the number of shared bits you added. That's it.
* Things should be binary compatible. But if either of these gets to having
* to subtract rather than add, leave at 0 and adjust all the entries below
* that are in terms of this according. But if the first one of those is
* already PMf_BASE_SHIFT+0, there are no bits left, and a redesign is in
* order.
*
* To remove unshared bits, just delete its entry. If you're where breaking
* binary compatibility is ok to do, you might want to adjust things to move
* the newly opened space so that it gets absorbed into the common pool.
*
* To add unshared bits, first use up any gaps in the middle. Otherwise,
* allocate off the low end until you get to PMf_BASE_SHIFT+0. If that isn't
* enough, move PMf_BASE_SHIFT down (if possible) and add the new bit at the
* other end instead; this preserves binary compatibility. */
#define PMf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+2)
/* Set by the parser if it discovers an error, so the regex shouldn't be
* compiled */
#define PMf_HAS_ERROR (1U<<(PMf_BASE_SHIFT+3))
/* 'use re "taint"' in scope: taint $1 etc. if target tainted */
#define PMf_RETAINT (1U<<(PMf_BASE_SHIFT+4))
/* match successfully only once per reset, with related flag RXf_USED in
* re->extflags holding state. This is used only for ?? matches, and only on
* OP_MATCH and OP_QR */
#define PMf_ONCE (1U<<(PMf_BASE_SHIFT+5))
/* PMf_ONCE, i.e. ?pat?, has matched successfully. Not used under threading. */
#define PMf_USED (1U<<(PMf_BASE_SHIFT+6))
/* subst replacement is constant */
#define PMf_CONST (1U<<(PMf_BASE_SHIFT+7))
/* keep 1st runtime pattern forever */
#define PMf_KEEP (1U<<(PMf_BASE_SHIFT+8))
#define PMf_GLOBAL (1U<<(PMf_BASE_SHIFT+9)) /* pattern had a g modifier */
/* don't reset pos() if //g fails */
#define PMf_CONTINUE (1U<<(PMf_BASE_SHIFT+10))
/* evaluating replacement as expr */
#define PMf_EVAL (1U<<(PMf_BASE_SHIFT+11))
/* Return substituted string instead of modifying it. */
#define PMf_NONDESTRUCT (1U<<(PMf_BASE_SHIFT+12))
/* the pattern has a CV attached (currently only under qr/...(?{}).../) */
#define PMf_HAS_CV (1U<<(PMf_BASE_SHIFT+13))
/* op_code_list is private; don't free it etc. It may well point to
* code within another sub, with different pad etc */
#define PMf_CODELIST_PRIVATE (1U<<(PMf_BASE_SHIFT+14))
/* the PMOP is a QR (we should be able to detect that from the op type,
* but the regex compilation API passes just the pm flags, not the op
* itself */
#define PMf_IS_QR (1U<<(PMf_BASE_SHIFT+15))
#define PMf_USE_RE_EVAL (1U<<(PMf_BASE_SHIFT+16)) /* use re'eval' in scope */
/* Means that this is a subpattern being compiled while processing a \p{}
* wildcard. This isn't called from op.c, but it is passed as a pm flag. */
#define PMf_WILDCARD (1U<<(PMf_BASE_SHIFT+17))
/* See comments at the beginning of these defines about adding bits. The
* highest bit position should be used, so that if PMf_BASE_SHIFT gets
* increased, the #error below will be triggered so that you will be reminded
* to adjust things at the other end to keep the bit positions unchanged */
#if PMf_BASE_SHIFT+17 > 31
# error Too many PMf_ bits used. See above and regnodes.h for any spare in middle
#endif
#ifdef USE_ITHREADS
# define PmopSTASH(o) ((o)->op_pmflags & PMf_ONCE \
? PL_stashpad[(o)->op_pmstashstartu.op_pmstashoff] \
: NULL)
# define PmopSTASH_set(o,hv) \
(assert_((o)->op_pmflags & PMf_ONCE) \
(o)->op_pmstashstartu.op_pmstashoff = \
(hv) ? alloccopstash(hv) : 0)
#else
# define PmopSTASH(o) \
(((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
# if defined (DEBUGGING) && defined(PERL_USE_GCC_BRACE_GROUPS)
# define PmopSTASH_set(o,hv) ({ \
assert((o)->op_pmflags & PMf_ONCE); \
((o)->op_pmstashstartu.op_pmstash = (hv)); \
})
# else
# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
# endif
#endif
#define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
/* op_pmstashstartu.op_pmstash is not refcounted */
#define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
struct svop {
BASEOP
SV * op_sv;
};
struct padop {
BASEOP
PADOFFSET op_padix;
};
struct pvop {
BASEOP
char * op_pv;
};
struct loop {
BASEOP
OP * op_first;
OP * op_last;
OP * op_redoop;
OP * op_nextop;
OP * op_lastop;
};
#define cUNOPx(o) ((UNOP*)(o))
#define cUNOP_AUXx(o) ((UNOP_AUX*)(o))
#define cBINOPx(o) ((BINOP*)(o))
#define cLISTOPx(o) ((LISTOP*)(o))
#define cLOGOPx(o) ((LOGOP*)(o))
#define cPMOPx(o) ((PMOP*)(o))
#define cSVOPx(o) ((SVOP*)(o))
#define cPADOPx(o) ((PADOP*)(o))
#define cPVOPx(o) ((PVOP*)(o))
#define cCOPx(o) ((COP*)(o))
#define cLOOPx(o) ((LOOP*)(o))
#define cMETHOPx(o) ((METHOP*)(o))
#define cUNOP cUNOPx(PL_op)
#define cUNOP_AUX cUNOP_AUXx(PL_op)
#define cBINOP cBINOPx(PL_op)
#define cLISTOP cLISTOPx(PL_op)
#define cLOGOP cLOGOPx(PL_op)
#define cPMOP cPMOPx(PL_op)
#define cSVOP cSVOPx(PL_op)
#define cPADOP cPADOPx(PL_op)
#define cPVOP cPVOPx(PL_op)
#define cCOP cCOPx(PL_op)
#define cLOOP cLOOPx(PL_op)
#define cUNOPo cUNOPx(o)
#define cUNOP_AUXo cUNOP_AUXx(o)
#define cBINOPo cBINOPx(o)
#define cLISTOPo cLISTOPx(o)
#define cLOGOPo cLOGOPx(o)
#define cPMOPo cPMOPx(o)
#define cSVOPo cSVOPx(o)
#define cPADOPo cPADOPx(o)
#define cPVOPo cPVOPx(o)
#define cCOPo cCOPx(o)
#define cLOOPo cLOOPx(o)
#define kUNOP cUNOPx(kid)
#define kUNOP_AUX cUNOP_AUXx(kid)
#define kBINOP cBINOPx(kid)
#define kLISTOP cLISTOPx(kid)
#define kLOGOP cLOGOPx(kid)
#define kPMOP cPMOPx(kid)
#define kSVOP cSVOPx(kid)
#define kPADOP cPADOPx(kid)
#define kPVOP cPVOPx(kid)
#define kCOP cCOPx(kid)
#define kLOOP cLOOPx(kid)
typedef enum {
OPclass_NULL, /* 0 */
OPclass_BASEOP, /* 1 */
OPclass_UNOP, /* 2 */
OPclass_BINOP, /* 3 */
OPclass_LOGOP, /* 4 */
OPclass_LISTOP, /* 5 */
OPclass_PMOP, /* 6 */
OPclass_SVOP, /* 7 */
OPclass_PADOP, /* 8 */
OPclass_PVOP, /* 9 */
OPclass_LOOP, /* 10 */
OPclass_COP, /* 11 */
OPclass_METHOP, /* 12 */
OPclass_UNOP_AUX /* 13 */
} OPclass;
#ifdef USE_ITHREADS
# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
# ifndef PERL_CORE
# define IS_PADGV(v) (v && isGV(v))
# define IS_PADCONST(v) \
(v && (SvREADONLY(v) || (SvIsCOW(v) && !SvLEN(v))))
# endif
# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
# define cMETHOPx_rclass(v) PAD_SVl(cMETHOPx(v)->op_rclass_targ)
#else
# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
# ifndef PERL_CORE
# define IS_PADGV(v) FALSE
# define IS_PADCONST(v) FALSE
# endif
# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
# define cMETHOPx_rclass(v) (cMETHOPx(v)->op_rclass_sv)
#endif
#define cMETHOPx_meth(v) cSVOPx_sv(v)
#define cGVOP_gv cGVOPx_gv(PL_op)
#define cGVOPo_gv cGVOPx_gv(o)
#define kGVOP_gv cGVOPx_gv(kid)
#define cSVOP_sv cSVOPx_sv(PL_op)
#define cSVOPo_sv cSVOPx_sv(o)
#define kSVOP_sv cSVOPx_sv(kid)
#ifndef PERL_CORE
# define Nullop ((OP*)NULL)
#endif
/* Lowest byte of PL_opargs */
#define OA_MARK 1
#define OA_FOLDCONST 2
#define OA_RETSCALAR 4
#define OA_TARGET 8
#define OA_TARGLEX 16
#define OA_OTHERINT 32
#define OA_DANGEROUS 64
#define OA_DEFGV 128
/* The next 4 bits (8..11) encode op class information */
#define OCSHIFT 8
#define OA_CLASS_MASK (15 << OCSHIFT)
#define OA_BASEOP (0 << OCSHIFT)
#define OA_UNOP (1 << OCSHIFT)
#define OA_BINOP (2 << OCSHIFT)
#define OA_LOGOP (3 << OCSHIFT)
#define OA_LISTOP (4 << OCSHIFT)
#define OA_PMOP (5 << OCSHIFT)
#define OA_SVOP (6 << OCSHIFT)
#define OA_PADOP (7 << OCSHIFT)
#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
#define OA_LOOP (9 << OCSHIFT)
#define OA_COP (10 << OCSHIFT)
#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
#define OA_FILESTATOP (12 << OCSHIFT)
#define OA_LOOPEXOP (13 << OCSHIFT)
#define OA_METHOP (14 << OCSHIFT)
#define OA_UNOP_AUX (15 << OCSHIFT)
/* Each remaining nybble of PL_opargs (i.e. bits 12..15, 16..19 etc)
* encode the type for each arg */
#define OASHIFT 12
#define OA_SCALAR 1
#define OA_LIST 2
#define OA_AVREF 3
#define OA_HVREF 4
#define OA_CVREF 5
#define OA_FILEREF 6
#define OA_SCALARREF 7
#define OA_OPTIONAL 8
/* Op_REFCNT is a reference count at the head of each op tree: needed
* since the tree is shared between threads, and between cloned closure
* copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
* this count.
* The same mutex is used to protect the refcounts of the reg_trie_data
* and reg_ac_data structures, which are shared between duplicated
* regexes.
*/
#ifdef USE_ITHREADS
# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
# ifdef PERL_CORE
# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
# else
# define OP_REFCNT_LOCK op_refcnt_lock()
# define OP_REFCNT_UNLOCK op_refcnt_unlock()
# endif
# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
#else
# define OP_REFCNT_INIT NOOP
# define OP_REFCNT_LOCK NOOP
# define OP_REFCNT_UNLOCK NOOP
# define OP_REFCNT_TERM NOOP
#endif
#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
#ifdef PERL_DEBUG_READONLY_OPS
# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
#else
# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
# define OpREFCNT_dec(o) (--(o)->op_targ)
#endif
/* flags used by Perl_load_module() */
#define PERL_LOADMOD_DENY 0x1 /* no Module */
#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
#define PERL_LOADMOD_IMPORT_OPS 0x4 /* import arguments
are passed as a sin-
gle op tree, not a
list of SVs */
#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C) || defined(PERL_IN_TOKE_C)
#define ref(o, type) doref(o, type, TRUE)
#endif
/* translation table attached to OP_TRANS/OP_TRANSR ops */
typedef struct {
Size_t size; /* number of entries in map[], not including final slot */
short map[1]; /* Unwarranted chumminess */
} OPtrans_map;
/*
=for apidoc_section $optree_manipulation
=for apidoc Am|OP*|LINKLIST|OP *o
Given the root of an optree, link the tree in execution order using the
C<op_next> pointers and return the first op executed. If this has
already been done, it will not be redone, and C<< o->op_next >> will be
returned. If C<< o->op_next >> is not already set, C<o> should be at
least an C<UNOP>.
=cut
*/
#define LINKLIST(o) ((o)->op_next ? (o)->op_next : op_linklist((OP*)o))
/* no longer used anywhere in core */
#ifndef PERL_CORE
#define cv_ckproto(cv, gv, p) \
cv_ckproto_len_flags((cv), (gv), (p), (p) ? strlen(p) : 0, 0)
#endif
#ifdef PERL_CORE
# define my(o) my_attrs((o), NULL)
#endif
#ifdef USE_REENTRANT_API
#include "reentr.h"
#endif
#define NewOp(m,var,c,type) \
(var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
#define NewOpSz(m,var,size) \
(var = (OP *) Perl_Slab_Alloc(aTHX_ size))
#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
/*
* The per-CV op slabs consist of a header (the opslab struct) and a bunch
* of space for allocating op slots, each of which consists of two pointers
* followed by an op. The first pointer points to the next op slot. The
* second points to the slab. At the end of the slab is a null pointer,
* so that slot->opslot_next - slot can be used to determine the size
* of the op.
*
* Each CV can have multiple slabs; opslab_next points to the next slab, to
* form a chain. All bookkeeping is done on the first slab, which is where
* all the op slots point.
*
* Freed ops are marked as freed and attached to the freed chain
* via op_next pointers.
*
* When there is more than one slab, the second slab in the slab chain is
* assumed to be the one with free space available. It is used when allo-
* cating an op if there are no freed ops available or big enough.
*/
#ifdef PERL_CORE
struct opslot {
U16 opslot_size; /* size of this slot (in pointers) */
U16 opslot_offset; /* offset from start of slab (in ptr units) */
OP opslot_op; /* the op itself */
};
struct opslab {
OPSLAB * opslab_next; /* next slab */
OPSLAB * opslab_head; /* first slab in chain */
OP ** opslab_freed; /* array of sized chains of freed ops (head only)*/
size_t opslab_refcnt; /* number of ops (head slab only) */
U16 opslab_freed_size; /* allocated size of opslab_freed */
U16 opslab_size; /* size of slab in pointers,
including header */
U16 opslab_free_space; /* space available in this slab
for allocating new ops (in ptr
units) */
# ifdef PERL_DEBUG_READONLY_OPS
bool opslab_readonly;
# endif
OPSLOT opslab_slots; /* slots begin here */
};
# define OPSLOT_HEADER STRUCT_OFFSET(OPSLOT, opslot_op)
# define OpSLOT(o) (assert_(o->op_slabbed) \
(OPSLOT *)(((char *)o)-OPSLOT_HEADER))
/* the slab that owns this op */
# define OpMySLAB(o) \
((OPSLAB*)((char *)((I32**)OpSLOT(o) - OpSLOT(o)->opslot_offset)-STRUCT_OFFSET(struct opslab, opslab_slots)))
/* the first (head) opslab of the chain in which this op is allocated */
# define OpSLAB(o) \
(OpMySLAB(o)->opslab_head)
/* calculate the slot given the owner slab and an offset */
#define OpSLOToff(slab, offset) \
((OPSLOT*)(((I32 **)&(slab)->opslab_slots)+(offset)))
# define OpslabREFCNT_dec(slab) \
(((slab)->opslab_refcnt == 1) \
? opslab_free_nopad(slab) \
: (void)--(slab)->opslab_refcnt)
/* Variant that does not null out the pads */
# define OpslabREFCNT_dec_padok(slab) \
(((slab)->opslab_refcnt == 1) \
? opslab_free(slab) \
: (void)--(slab)->opslab_refcnt)
#endif
struct block_hooks {
U32 bhk_flags;
void (*bhk_start) (pTHX_ int full);
void (*bhk_pre_end) (pTHX_ OP **seq);
void (*bhk_post_end) (pTHX_ OP **seq);
void (*bhk_eval) (pTHX_ OP *const saveop);
};
/*
=for apidoc_section $scope
=for apidoc mx|U32|BhkFLAGS|BHK *hk
Return the BHK's flags.
=for apidoc mxu|void *|BhkENTRY|BHK *hk|which
Return an entry from the BHK structure. C<which> is a preprocessor token
indicating which entry to return. If the appropriate flag is not set
this will return C<NULL>. The type of the return value depends on which
entry you ask for.
=for apidoc Amxu|void|BhkENTRY_set|BHK *hk|which|void *ptr
Set an entry in the BHK structure, and set the flags to indicate it is
valid. C<which> is a preprocessing token indicating which entry to set.
The type of C<ptr> depends on the entry.
=for apidoc Amxu|void|BhkDISABLE|BHK *hk|which
Temporarily disable an entry in this BHK structure, by clearing the
appropriate flag. C<which> is a preprocessor token indicating which
entry to disable.
=for apidoc Amxu|void|BhkENABLE|BHK *hk|which
Re-enable an entry in this BHK structure, by setting the appropriate
flag. C<which> is a preprocessor token indicating which entry to enable.
This will assert (under -DDEBUGGING) if the entry doesn't contain a valid
pointer.
=for apidoc mxu|void|CALL_BLOCK_HOOKS|which|arg
Call all the registered block hooks for type C<which>. C<which> is a
preprocessing token; the type of C<arg> depends on C<which>.
=cut
*/
#define BhkFLAGS(hk) ((hk)->bhk_flags)
#define BHKf_bhk_start 0x01
#define BHKf_bhk_pre_end 0x02
#define BHKf_bhk_post_end 0x04
#define BHKf_bhk_eval 0x08
#define BhkENTRY(hk, which) \
((BhkFLAGS(hk) & BHKf_ ## which) ? ((hk)->which) : NULL)
#define BhkENABLE(hk, which) \
STMT_START { \
BhkFLAGS(hk) |= BHKf_ ## which; \
assert(BhkENTRY(hk, which)); \
} STMT_END
#define BhkDISABLE(hk, which) \
STMT_START { \
BhkFLAGS(hk) &= ~(BHKf_ ## which); \
} STMT_END
#define BhkENTRY_set(hk, which, ptr) \
STMT_START { \
(hk)->which = ptr; \
BhkENABLE(hk, which); \
} STMT_END
#define CALL_BLOCK_HOOKS(which, arg) \
STMT_START { \
if (PL_blockhooks) { \
SSize_t i; \
for (i = av_top_index(PL_blockhooks); i >= 0; i--) { \
SV *sv = AvARRAY(PL_blockhooks)[i]; \
BHK *hk; \
\
assert(SvIOK(sv)); \
if (SvUOK(sv)) \
hk = INT2PTR(BHK *, SvUVX(sv)); \
else \
hk = INT2PTR(BHK *, SvIVX(sv)); \
\
if (BhkENTRY(hk, which)) \
BhkENTRY(hk, which)(aTHX_ arg); \
} \
} \
} STMT_END
/* flags for rv2cv_op_cv */
#define RV2CVOPCV_MARK_EARLY 0x00000001
#define RV2CVOPCV_RETURN_NAME_GV 0x00000002
#define RV2CVOPCV_RETURN_STUB 0x00000004
#if defined(PERL_CORE) || defined(PERL_EXT) /* behaviour of this flag is subject to change: */
# define RV2CVOPCV_MAYBE_NAME_GV 0x00000008
#endif
#define RV2CVOPCV_FLAG_MASK 0x0000000f /* all of the above */
#define op_lvalue(op,t) Perl_op_lvalue_flags(aTHX_ op,t,0)
/* flags for op_lvalue_flags */
#define OP_LVALUE_NO_CROAK 1
/*
=for apidoc_section $custom
=for apidoc Am|U32|XopFLAGS|XOP *xop
Return the XOP's flags.
=for apidoc Am||XopENTRY|XOP *xop|which
Return a member of the XOP structure. C<which> is a cpp token
indicating which entry to return. If the member is not set
this will return a default value. The return type depends
on C<which>. This macro evaluates its arguments more than
once. If you are using C<Perl_custom_op_xop> to retrieve a
C<XOP *> from a C<OP *>, use the more efficient L</XopENTRYCUSTOM> instead.
=for apidoc Am||XopENTRYCUSTOM|const OP *o|which
Exactly like C<XopENTRY(XopENTRY(Perl_custom_op_xop(aTHX_ o), which)> but more
efficient. The C<which> parameter is identical to L</XopENTRY>.
=for apidoc Am|void|XopENTRY_set|XOP *xop|which|value
Set a member of the XOP structure. C<which> is a cpp token
indicating which entry to set. See L<perlguts/"Custom Operators">
for details about the available members and how
they are used. This macro evaluates its argument
more than once.
=for apidoc Am|void|XopDISABLE|XOP *xop|which
Temporarily disable a member of the XOP, by clearing the appropriate flag.
=for apidoc Am|void|XopENABLE|XOP *xop|which
Reenable a member of the XOP which has been disabled.
=cut
*/
struct custom_op {
U32 xop_flags;
const char *xop_name;
const char *xop_desc;
U32 xop_class;
void (*xop_peep)(pTHX_ OP *o, OP *oldop);
};
/* return value of Perl_custom_op_get_field, similar to void * then casting but
the U32 doesn't need truncation on 64 bit platforms in the caller, also
for easier macro writing */
typedef union {
const char *xop_name;
const char *xop_desc;
U32 xop_class;
void (*xop_peep)(pTHX_ OP *o, OP *oldop);
XOP *xop_ptr;
} XOPRETANY;
#define XopFLAGS(xop) ((xop)->xop_flags)
#define XOPf_xop_name 0x01
#define XOPf_xop_desc 0x02
#define XOPf_xop_class 0x04
#define XOPf_xop_peep 0x08
/* used by Perl_custom_op_get_field for option checking */
typedef enum {
XOPe_xop_ptr = 0, /* just get the XOP *, don't look inside it */
XOPe_xop_name = XOPf_xop_name,
XOPe_xop_desc = XOPf_xop_desc,
XOPe_xop_class = XOPf_xop_class,
XOPe_xop_peep = XOPf_xop_peep
} xop_flags_enum;
#define XOPd_xop_name PL_op_name[OP_CUSTOM]
#define XOPd_xop_desc PL_op_desc[OP_CUSTOM]
#define XOPd_xop_class OA_BASEOP
#define XOPd_xop_peep ((Perl_cpeep_t)0)
#define XopENTRY_set(xop, which, to) \
STMT_START { \
(xop)->which = (to); \
(xop)->xop_flags |= XOPf_ ## which; \
} STMT_END
#define XopENTRY(xop, which) \
((XopFLAGS(xop) & XOPf_ ## which) ? (xop)->which : XOPd_ ## which)
#define XopENTRYCUSTOM(o, which) \
(Perl_custom_op_get_field(aTHX_ o, XOPe_ ## which).which)
#define XopDISABLE(xop, which) ((xop)->xop_flags &= ~XOPf_ ## which)
#define XopENABLE(xop, which) \
STMT_START { \
(xop)->xop_flags |= XOPf_ ## which; \
assert(XopENTRY(xop, which)); \
} STMT_END
#define Perl_custom_op_xop(x) \
(Perl_custom_op_get_field(x, XOPe_xop_ptr).xop_ptr)
/*
=for apidoc_section $optree_manipulation
=for apidoc Am|const char *|OP_NAME|OP *o
Return the name of the provided OP. For core ops this looks up the name
from the op_type; for custom ops from the op_ppaddr.
=for apidoc Am|const char *|OP_DESC|OP *o
Return a short description of the provided OP.
=for apidoc Am|U32|OP_CLASS|OP *o
Return the class of the provided OP: that is, which of the *OP
structures it uses. For core ops this currently gets the information out
of C<PL_opargs>, which does not always accurately reflect the type used;
in v5.26 onwards, see also the function C<L</op_class>> which can do a better
job of determining the used type.
For custom ops the type is returned from the registration, and it is up
to the registree to ensure it is accurate. The value returned will be
one of the C<OA_>* constants from F<op.h>.
=for apidoc Am|bool|OP_TYPE_IS|OP *o|Optype type
Returns true if the given OP is not a C<NULL> pointer
and if it is of the given type.
The negation of this macro, C<OP_TYPE_ISNT> is also available
as well as C<OP_TYPE_IS_NN> and C<OP_TYPE_ISNT_NN> which elide
the NULL pointer check.
=for apidoc Am|bool|OP_TYPE_IS_OR_WAS|OP *o|Optype type
Returns true if the given OP is not a NULL pointer and
if it is of the given type or used to be before being
replaced by an OP of type OP_NULL.
The negation of this macro, C<OP_TYPE_ISNT_AND_WASNT>
is also available as well as C<OP_TYPE_IS_OR_WAS_NN>
and C<OP_TYPE_ISNT_AND_WASNT_NN> which elide
the C<NULL> pointer check.
=for apidoc Am|bool|OpHAS_SIBLING|OP *o
Returns true if C<o> has a sibling