3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
9 * Control ops (cops) are one of the two ops OP_NEXTSTATE and OP_DBSTATE,
10 * that (loosely speaking) are statement separators.
11 * They hold information important for lexical state and error reporting.
12 * At run time, PL_curcop is set to point to the most recently executed cop,
13 * and thus can be used to determine our current state.
16 /* A jmpenv packages the state required to perform a proper non-local jump.
17 * Note that there is a PL_start_env initialized when perl starts, and
18 * PL_top_env points to this initially, so PL_top_env should always be
21 * Existence of a non-null PL_top_env->je_prev implies it is valid to call
22 * longjmp() at that runlevel (we make sure PL_start_env.je_prev is always
23 * null to ensure this).
25 * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
26 * establish a local jmpenv to handle exception traps. Care must be taken
27 * to restore the previous value of je_mustcatch before exiting the
28 * stack frame iff JMPENV_PUSH was not called in that stack frame.
33 struct jmpenv * je_prev;
34 Sigjmp_buf je_buf; /* uninit if je_prev is NULL */
35 int je_ret; /* last exception thrown */
36 bool je_mustcatch; /* need to call longjmp()? */
37 U16 je_old_delaymagic; /* saved PL_delaymagic */
40 typedef struct jmpenv JMPENV;
43 * How to build the first jmpenv.
45 * top_env needs to be non-zero. It points to an area
46 * in which longjmp() stuff is stored, as C callstack
47 * info there at least is thread specific this has to
48 * be per-thread. Otherwise a 'die' in a thread gives
49 * that thread the C stack of last thread to do an eval {}!
52 #define JMPENV_BOOTSTRAP \
54 PERL_POISON_EXPR(PoisonNew(&PL_start_env, 1, JMPENV));\
55 PL_top_env = &PL_start_env; \
56 PL_start_env.je_prev = NULL; \
57 PL_start_env.je_ret = -1; \
58 PL_start_env.je_mustcatch = TRUE; \
59 PL_start_env.je_old_delaymagic = 0; \
63 * PERL_FLEXIBLE_EXCEPTIONS
65 * All the flexible exceptions code has been removed.
66 * See the following threads for details:
68 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html
70 * Joshua's original patches (which weren't applied) and discussion:
72 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
73 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
74 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
75 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
76 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
77 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
79 * Chip's reworked patch and discussion:
81 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
83 * The flaw in these patches (which went unnoticed at the time) was
84 * that they moved some code that could potentially die() out of the
85 * region protected by the setjmp()s. This caused exceptions within
86 * END blocks and such to not be handled by the correct setjmp().
88 * The original patches that introduces flexible exceptions were:
90 * http://perl5.git.perl.org/perl.git/commit/312caa8e97f1c7ee342a9895c2f0e749625b4929
91 * http://perl5.git.perl.org/perl.git/commit/14dd3ad8c9bf82cf09798a22cc89a9862dfd6d1a
95 #define dJMPENV JMPENV cur_env
97 #define JMPENV_PUSH(v) \
100 int i = 0; JMPENV *p = PL_top_env; \
101 while (p) { i++; p = p->je_prev; } \
102 Perl_deb(aTHX_ "JUMPENV_PUSH level=%d at %s:%d\n", \
103 i, __FILE__, __LINE__);}) \
104 cur_env.je_prev = PL_top_env; \
105 cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \
106 PL_top_env = &cur_env; \
107 cur_env.je_mustcatch = FALSE; \
108 cur_env.je_old_delaymagic = PL_delaymagic; \
109 (v) = cur_env.je_ret; \
115 int i = -1; JMPENV *p = PL_top_env; \
116 while (p) { i++; p = p->je_prev; } \
117 Perl_deb(aTHX_ "JUMPENV_POP level=%d at %s:%d\n", \
118 i, __FILE__, __LINE__);}) \
119 assert(PL_top_env == &cur_env); \
120 PL_delaymagic = cur_env.je_old_delaymagic; \
121 PL_top_env = cur_env.je_prev; \
124 #define JMPENV_JUMP(v) \
127 int i = -1; JMPENV *p = PL_top_env; \
128 while (p) { i++; p = p->je_prev; } \
129 Perl_deb(aTHX_ "JUMPENV_JUMP(%d) level=%d at %s:%d\n", \
130 (int)v, i, __FILE__, __LINE__);}) \
131 if (PL_top_env->je_prev) \
132 PerlProc_longjmp(PL_top_env->je_buf, (v)); \
134 PerlProc_exit(STATUS_EXIT); \
135 PerlIO_printf(PerlIO_stderr(), "panic: top_env, v=%d\n", (int)v); \
139 #define CATCH_GET (PL_top_env->je_mustcatch)
140 #define CATCH_SET(v) \
144 "JUMPLEVEL set catch %d => %d (for %p) at %s:%d\n", \
145 PL_top_env->je_mustcatch, v, (void*)PL_top_env, \
146 __FILE__, __LINE__);) \
147 PL_top_env->je_mustcatch = (v); \
151 =head1 COP Hint Hashes
154 typedef struct refcounted_he COPHH;
156 #define COPHH_KEY_UTF8 REFCOUNTED_HE_KEY_UTF8
159 =for apidoc Amx|SV *|cophh_fetch_pvn|const COPHH *cophh|const char *keypv|STRLEN keylen|U32 hash|U32 flags
161 Look up the entry in the cop hints hash C<cophh> with the key specified by
162 C<keypv> and C<keylen>. If C<flags> has the C<COPHH_KEY_UTF8> bit set,
163 the key octets are interpreted as UTF-8, otherwise they are interpreted
164 as Latin-1. C<hash> is a precomputed hash of the key string, or zero if
165 it has not been precomputed. Returns a mortal scalar copy of the value
166 associated with the key, or C<&PL_sv_placeholder> if there is no value
167 associated with the key.
172 #define cophh_fetch_pvn(cophh, keypv, keylen, hash, flags) \
173 Perl_refcounted_he_fetch_pvn(aTHX_ cophh, keypv, keylen, hash, flags)
176 =for apidoc Amx|SV *|cophh_fetch_pvs|const COPHH *cophh|const char *key|U32 flags
178 Like L</cophh_fetch_pvn>, but takes a literal string instead of a
179 string/length pair, and no precomputed hash.
184 #define cophh_fetch_pvs(cophh, key, flags) \
185 Perl_refcounted_he_fetch_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, flags)
188 =for apidoc Amx|SV *|cophh_fetch_pv|const COPHH *cophh|const char *key|U32 hash|U32 flags
190 Like L</cophh_fetch_pvn>, but takes a nul-terminated string instead of
191 a string/length pair.
196 #define cophh_fetch_pv(cophh, key, hash, flags) \
197 Perl_refcounted_he_fetch_pv(aTHX_ cophh, key, hash, flags)
200 =for apidoc Amx|SV *|cophh_fetch_sv|const COPHH *cophh|SV *key|U32 hash|U32 flags
202 Like L</cophh_fetch_pvn>, but takes a Perl scalar instead of a
208 #define cophh_fetch_sv(cophh, key, hash, flags) \
209 Perl_refcounted_he_fetch_sv(aTHX_ cophh, key, hash, flags)
212 =for apidoc Amx|HV *|cophh_2hv|const COPHH *cophh|U32 flags
214 Generates and returns a standard Perl hash representing the full set of
215 key/value pairs in the cop hints hash C<cophh>. C<flags> is currently
216 unused and must be zero.
221 #define cophh_2hv(cophh, flags) \
222 Perl_refcounted_he_chain_2hv(aTHX_ cophh, flags)
225 =for apidoc Amx|COPHH *|cophh_copy|COPHH *cophh
227 Make and return a complete copy of the cop hints hash C<cophh>.
232 #define cophh_copy(cophh) Perl_refcounted_he_inc(aTHX_ cophh)
235 =for apidoc Amx|void|cophh_free|COPHH *cophh
237 Discard the cop hints hash C<cophh>, freeing all resources associated
243 #define cophh_free(cophh) Perl_refcounted_he_free(aTHX_ cophh)
246 =for apidoc Amx|COPHH *|cophh_new_empty
248 Generate and return a fresh cop hints hash containing no entries.
253 #define cophh_new_empty() ((COPHH *)NULL)
256 =for apidoc Amx|COPHH *|cophh_store_pvn|COPHH *cophh|const char *keypv|STRLEN keylen|U32 hash|SV *value|U32 flags
258 Stores a value, associated with a key, in the cop hints hash C<cophh>,
259 and returns the modified hash. The returned hash pointer is in general
260 not the same as the hash pointer that was passed in. The input hash is
261 consumed by the function, and the pointer to it must not be subsequently
262 used. Use L</cophh_copy> if you need both hashes.
264 The key is specified by C<keypv> and C<keylen>. If C<flags> has the
265 C<COPHH_KEY_UTF8> bit set, the key octets are interpreted as UTF-8,
266 otherwise they are interpreted as Latin-1. C<hash> is a precomputed
267 hash of the key string, or zero if it has not been precomputed.
269 C<value> is the scalar value to store for this key. C<value> is copied
270 by this function, which thus does not take ownership of any reference
271 to it, and later changes to the scalar will not be reflected in the
272 value visible in the cop hints hash. Complex types of scalar will not
273 be stored with referential integrity, but will be coerced to strings.
278 #define cophh_store_pvn(cophh, keypv, keylen, hash, value, flags) \
279 Perl_refcounted_he_new_pvn(aTHX_ cophh, keypv, keylen, hash, value, flags)
282 =for apidoc Amx|COPHH *|cophh_store_pvs|const COPHH *cophh|const char *key|SV *value|U32 flags
284 Like L</cophh_store_pvn>, but takes a literal string instead of a
285 string/length pair, and no precomputed hash.
290 #define cophh_store_pvs(cophh, key, value, flags) \
291 Perl_refcounted_he_new_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, value, flags)
294 =for apidoc Amx|COPHH *|cophh_store_pv|const COPHH *cophh|const char *key|U32 hash|SV *value|U32 flags
296 Like L</cophh_store_pvn>, but takes a nul-terminated string instead of
297 a string/length pair.
302 #define cophh_store_pv(cophh, key, hash, value, flags) \
303 Perl_refcounted_he_new_pv(aTHX_ cophh, key, hash, value, flags)
306 =for apidoc Amx|COPHH *|cophh_store_sv|const COPHH *cophh|SV *key|U32 hash|SV *value|U32 flags
308 Like L</cophh_store_pvn>, but takes a Perl scalar instead of a
314 #define cophh_store_sv(cophh, key, hash, value, flags) \
315 Perl_refcounted_he_new_sv(aTHX_ cophh, key, hash, value, flags)
318 =for apidoc Amx|COPHH *|cophh_delete_pvn|COPHH *cophh|const char *keypv|STRLEN keylen|U32 hash|U32 flags
320 Delete a key and its associated value from the cop hints hash C<cophh>,
321 and returns the modified hash. The returned hash pointer is in general
322 not the same as the hash pointer that was passed in. The input hash is
323 consumed by the function, and the pointer to it must not be subsequently
324 used. Use L</cophh_copy> if you need both hashes.
326 The key is specified by C<keypv> and C<keylen>. If C<flags> has the
327 C<COPHH_KEY_UTF8> bit set, the key octets are interpreted as UTF-8,
328 otherwise they are interpreted as Latin-1. C<hash> is a precomputed
329 hash of the key string, or zero if it has not been precomputed.
334 #define cophh_delete_pvn(cophh, keypv, keylen, hash, flags) \
335 Perl_refcounted_he_new_pvn(aTHX_ cophh, keypv, keylen, hash, \
339 =for apidoc Amx|COPHH *|cophh_delete_pvs|const COPHH *cophh|const char *key|U32 flags
341 Like L</cophh_delete_pvn>, but takes a literal string instead of a
342 string/length pair, and no precomputed hash.
347 #define cophh_delete_pvs(cophh, key, flags) \
348 Perl_refcounted_he_new_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, \
352 =for apidoc Amx|COPHH *|cophh_delete_pv|const COPHH *cophh|const char *key|U32 hash|U32 flags
354 Like L</cophh_delete_pvn>, but takes a nul-terminated string instead of
355 a string/length pair.
360 #define cophh_delete_pv(cophh, key, hash, flags) \
361 Perl_refcounted_he_new_pv(aTHX_ cophh, key, hash, (SV *)NULL, flags)
364 =for apidoc Amx|COPHH *|cophh_delete_sv|const COPHH *cophh|SV *key|U32 hash|U32 flags
366 Like L</cophh_delete_pvn>, but takes a Perl scalar instead of a
372 #define cophh_delete_sv(cophh, key, hash, flags) \
373 Perl_refcounted_he_new_sv(aTHX_ cophh, key, hash, (SV *)NULL, flags)
375 #include "mydtrace.h"
379 /* On LP64 putting this here takes advantage of the fact that BASEOP isn't
380 an exact multiple of 8 bytes to save structure padding. */
381 line_t cop_line; /* line # of this command */
382 /* label for this construct is now stored in cop_hints_hash */
384 PADOFFSET cop_stashoff; /* offset into PL_stashpad, for the
385 package the line was compiled in */
386 char * cop_file; /* file name the following line # is from */
388 HV * cop_stash; /* package line was compiled in */
389 GV * cop_filegv; /* file the following line # is from */
391 U32 cop_hints; /* hints bits from pragmata */
392 U32 cop_seq; /* parse sequence number */
393 /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */
394 STRLEN * cop_warnings; /* lexical warnings bitmask */
395 /* compile time state of %^H. See the comment in op.c for how this is
396 used to recreate a hash to return from caller. */
397 COPHH * cop_hints_hash;
401 # define CopFILE(c) ((c)->cop_file)
402 # define CopFILEGV(c) (CopFILE(c) \
403 ? gv_fetchfile(CopFILE(c)) : NULL)
406 # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
407 # define CopFILE_setn(c,pv,l) ((c)->cop_file = savepvn((pv),(l)))
409 # define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
410 # define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l)))
413 # define CopFILESV(c) (CopFILE(c) \
414 ? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
415 # define CopFILEAV(c) (CopFILE(c) \
416 ? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
417 # define CopFILEAVx(c) (assert_(CopFILE(c)) \
418 GvAV(gv_fetchfile(CopFILE(c))))
420 # define CopSTASH(c) PL_stashpad[(c)->cop_stashoff]
421 # define CopSTASH_set(c,hv) ((c)->cop_stashoff = (hv) \
422 ? alloccopstash(hv) \
425 # define CopFILE_free(c) SAVECOPFILE_FREE(c)
427 # define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL))
430 # define CopFILEGV(c) ((c)->cop_filegv)
431 # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
432 # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
433 # define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
434 # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
435 # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
437 # define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
439 # define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
441 # define CopFILE(c) (CopFILEGV(c) \
442 ? GvNAME(CopFILEGV(c))+2 : NULL)
443 # define CopSTASH(c) ((c)->cop_stash)
444 # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
445 # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
447 #endif /* USE_ITHREADS */
449 #define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
450 /* cop_stash is not refcounted */
451 #define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
452 #define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
454 #define CopHINTHASH_get(c) ((COPHH*)((c)->cop_hints_hash))
455 #define CopHINTHASH_set(c,h) ((c)->cop_hints_hash = (h))
458 =head1 COP Hint Reading
462 =for apidoc Am|SV *|cop_hints_fetch_pvn|const COP *cop|const char *keypv|STRLEN keylen|U32 hash|U32 flags
464 Look up the hint entry in the cop C<cop> with the key specified by
465 C<keypv> and C<keylen>. If C<flags> has the C<COPHH_KEY_UTF8> bit set,
466 the key octets are interpreted as UTF-8, otherwise they are interpreted
467 as Latin-1. C<hash> is a precomputed hash of the key string, or zero if
468 it has not been precomputed. Returns a mortal scalar copy of the value
469 associated with the key, or C<&PL_sv_placeholder> if there is no value
470 associated with the key.
475 #define cop_hints_fetch_pvn(cop, keypv, keylen, hash, flags) \
476 cophh_fetch_pvn(CopHINTHASH_get(cop), keypv, keylen, hash, flags)
479 =for apidoc Am|SV *|cop_hints_fetch_pvs|const COP *cop|const char *key|U32 flags
481 Like L</cop_hints_fetch_pvn>, but takes a literal string instead of a
482 string/length pair, and no precomputed hash.
487 #define cop_hints_fetch_pvs(cop, key, flags) \
488 cophh_fetch_pvs(CopHINTHASH_get(cop), key, flags)
491 =for apidoc Am|SV *|cop_hints_fetch_pv|const COP *cop|const char *key|U32 hash|U32 flags
493 Like L</cop_hints_fetch_pvn>, but takes a nul-terminated string instead
494 of a string/length pair.
499 #define cop_hints_fetch_pv(cop, key, hash, flags) \
500 cophh_fetch_pv(CopHINTHASH_get(cop), key, hash, flags)
503 =for apidoc Am|SV *|cop_hints_fetch_sv|const COP *cop|SV *key|U32 hash|U32 flags
505 Like L</cop_hints_fetch_pvn>, but takes a Perl scalar instead of a
511 #define cop_hints_fetch_sv(cop, key, hash, flags) \
512 cophh_fetch_sv(CopHINTHASH_get(cop), key, hash, flags)
515 =for apidoc Am|HV *|cop_hints_2hv|const COP *cop|U32 flags
517 Generates and returns a standard Perl hash representing the full set of
518 hint entries in the cop C<cop>. C<flags> is currently unused and must
524 #define cop_hints_2hv(cop, flags) \
525 cophh_2hv(CopHINTHASH_get(cop), flags)
527 #define CopLABEL(c) Perl_cop_fetch_label(aTHX_ (c), NULL, NULL)
528 #define CopLABEL_len(c,len) Perl_cop_fetch_label(aTHX_ (c), len, NULL)
529 #define CopLABEL_len_flags(c,len,flags) Perl_cop_fetch_label(aTHX_ (c), len, flags)
530 #define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
532 #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
533 #define CopLINE(c) ((c)->cop_line)
534 #define CopLINE_inc(c) (++CopLINE(c))
535 #define CopLINE_dec(c) (--CopLINE(c))
536 #define CopLINE_set(c,l) (CopLINE(c) = (l))
538 /* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
539 #define OutCopFILE(c) CopFILE(c)
541 #define CopHINTS_get(c) ((c)->cop_hints + 0)
542 #define CopHINTS_set(c, h) STMT_START { \
543 (c)->cop_hints = (h); \
547 * Here we have some enormously heavy (or at least ponderous) wizardry.
550 /* subroutine context */
552 OP * retop; /* op to execute on exit from sub */
553 /* Above here is the same for sub, format and eval. */
554 PAD *prevcomppad; /* the caller's PL_comppad */
556 /* Above here is the same for sub and format. */
563 struct block_format {
564 OP * retop; /* op to execute on exit from sub */
565 /* Above here is the same for sub, format and eval. */
566 PAD *prevcomppad; /* the caller's PL_comppad */
568 /* Above here is the same for sub and format. */
573 /* base for the next two macros. Don't use directly.
574 * The context frame holds a reference to the CV so that it can't be
575 * freed while we're executing it */
577 #define PUSHSUB_BASE(cx) \
578 ENTRY_PROBE(CvNAMED(cv) \
579 ? HEK_KEY(CvNAME_HEK(cv)) \
580 : GvENAME(CvGV(cv)), \
581 CopFILE((const COP *)CvSTART(cv)), \
582 CopLINE((const COP *)CvSTART(cv)), \
583 CopSTASHPV((const COP *)CvSTART(cv))); \
585 cx->blk_sub.cv = cv; \
586 cx->blk_sub.olddepth = CvDEPTH(cv); \
587 cx->blk_sub.prevcomppad = PL_comppad; \
588 cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \
589 cx->blk_sub.retop = NULL; \
590 SvREFCNT_inc_simple_void_NN(cv); \
591 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
592 PL_tmps_floor = PL_tmps_ix;
594 #define PUSHSUB_GET_LVALUE_MASK(func) \
595 /* If the context is indeterminate, then only the lvalue */ \
596 /* flags that the caller also has are applicable. */ \
598 (PL_op->op_flags & OPf_WANT) \
599 ? OPpENTERSUB_LVAL_MASK \
600 : !(PL_op->op_private & OPpENTERSUB_LVAL_MASK) \
601 ? 0 : (U8)func(aTHX) \
604 #define PUSHSUB(cx) \
606 U8 phlags = PUSHSUB_GET_LVALUE_MASK(Perl_was_lvalue_sub); \
608 cx->blk_u16 = PL_op->op_private & \
612 /* variant for use by OP_DBSTATE, where op_private holds hint bits */
613 #define PUSHSUB_DB(cx) \
618 #define PUSHFORMAT(cx, retop) \
619 cx->blk_format.cv = cv; \
620 cx->blk_format.gv = gv; \
621 cx->blk_format.retop = (retop); \
622 cx->blk_format.dfoutgv = PL_defoutgv; \
623 cx->blk_format.prevcomppad = PL_comppad; \
625 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
626 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
627 PL_tmps_floor = PL_tmps_ix; \
628 SvREFCNT_inc_simple_void_NN(cv); \
630 SvREFCNT_inc_void(cx->blk_format.dfoutgv)
633 #define POP_SAVEARRAY() \
635 AV *av = GvAV(PL_defgv); \
636 GvAV(PL_defgv) = cx->blk_sub.savearray; \
640 /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
641 * leave any (a fast av_clear(ary), basically) */
642 #define CLEAR_ARGARRAY(ary) \
644 AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
645 AvARRAY(ary) = AvALLOC(ary); \
649 #define POPSUB(cx,sv) \
651 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix); \
652 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
653 cx->blk_u16 |= CxPOPSUB_DONE; \
654 RETURN_PROBE(CvNAMED(cx->blk_sub.cv) \
655 ? HEK_KEY(CvNAME_HEK(cx->blk_sub.cv)) \
656 : GvENAME(CvGV(cx->blk_sub.cv)), \
657 CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
658 CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
659 CopSTASHPV((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
661 if (CxHASARGS(cx)) { \
663 assert(AvARRAY(MUTABLE_AV( \
664 PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ \
665 CvDEPTH(cx->blk_sub.cv)])) == PL_curpad); \
667 /* abandon @_ if it got reified */ \
668 av = MUTABLE_AV(PAD_SVl(0)); \
669 if (UNLIKELY(AvREAL(av))) \
670 clear_defarray(av, 0); \
672 CLEAR_ARGARRAY(av); \
676 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
677 PL_comppad = cx->blk_sub.prevcomppad; \
678 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
679 sv = MUTABLE_SV(cx->blk_sub.cv); \
680 CvDEPTH((const CV*)sv) = cx->blk_sub.olddepth; \
683 #define LEAVESUB(sv) \
688 #define POPFORMAT(cx) \
690 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix); \
691 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
692 CV * const cv = cx->blk_format.cv; \
693 GV * const dfuot = cx->blk_format.dfoutgv; \
694 cx->blk_u16 |= CxPOPSUB_DONE; \
695 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
697 PL_comppad = cx->blk_format.prevcomppad; \
698 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
700 SvREFCNT_dec_NN(cx->blk_format.cv); \
701 SvREFCNT_dec_NN(dfuot); \
707 OP * retop; /* op to execute on exit from eval */
708 /* Above here is the same for sub, format and eval. */
713 JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
716 /* If we ever need more than 512 op types, change the shift from 7.
717 blku_gimme is actually also only 2 bits, so could be merged with something.
720 #define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F)
721 #define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7)
723 #define PUSHEVAL(cx,n) \
725 assert(!(PL_in_eval & ~0x7F)); \
726 assert(!(PL_op->op_type & ~0x1FF)); \
727 cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \
728 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
729 PL_tmps_floor = PL_tmps_ix; \
730 cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
731 cx->blk_eval.old_eval_root = PL_eval_root; \
732 cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
733 cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
734 cx->blk_eval.retop = NULL; \
735 cx->blk_eval.cur_top_env = PL_top_env; \
738 #define POPEVAL(cx) \
740 PL_in_eval = CxOLD_IN_EVAL(cx); \
741 optype = CxOLD_OP_TYPE(cx); \
742 PL_eval_root = cx->blk_eval.old_eval_root; \
743 if (cx->blk_eval.cur_text && SvSCREAM(cx->blk_eval.cur_text)) \
744 SvREFCNT_dec_NN(cx->blk_eval.cur_text); \
745 if (cx->blk_eval.old_namesv) \
746 sv_2mortal(cx->blk_eval.old_namesv); \
752 LOOP * my_op; /* My op, that contains redo, next and last ops. */
753 union { /* different ways of locating the iteration variable */
754 SV **svp; /* for lexicals: address of pad slot */
755 GV *gv; /* for package vars */
757 SV *itersave; /* the original iteration var */
759 struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/
760 AV * ary; /* use the stack if this is NULL */
763 struct { /* valid if type is LOOP_LAZYIV */
767 struct { /* valid if type if LOOP_LAZYSV */
769 SV * end; /* maxiumum value (or minimum in reverse) */
773 PAD *oldcomppad; /* needed to map itervar_u.svp during thread clone */
777 #define CxITERVAR(c) \
779 ? (c)->blk_loop.itervar_u.svp \
780 : ((c)->cx_type & CXp_FOR_GV) \
781 ? &GvSV((c)->blk_loop.itervar_u.gv) \
782 : (SV **)&(c)->blk_loop.itervar_u.gv)
784 #define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop))
785 #define CxLABEL_len(c,len) (0 + CopLABEL_len((c)->blk_oldcop, len))
786 #define CxLABEL_len_flags(c,len,flags) (0 + CopLABEL_len_flags((c)->blk_oldcop, len, flags))
787 #define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
788 #define CxLVAL(c) (0 + ((c)->blk_u16 & 0xff))
789 /* POPSUB has already been performed on this context frame */
790 #define CxPOPSUB_DONE 0x100
793 #define PUSHLOOP_PLAIN(cx, s) \
794 cx->blk_loop.resetsp = s - PL_stack_base; \
795 cx->blk_loop.my_op = cLOOP; \
796 cx->blk_loop.state_u.ary.ary = NULL; \
797 cx->blk_loop.state_u.ary.ix = 0; \
798 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
799 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
800 PL_tmps_floor = PL_tmps_ix; \
801 cx->blk_loop.itervar_u.svp = NULL; \
802 cx->blk_loop.itersave = NULL;
805 # define PUSHLOOP_FOR_setpad(c) (c)->blk_loop.oldcomppad = PL_comppad
807 # define PUSHLOOP_FOR_setpad(c) NOOP
810 #define PUSHLOOP_FOR(cx, ivar, isave, s) \
811 cx->blk_loop.resetsp = s - PL_stack_base; \
812 cx->blk_loop.my_op = cLOOP; \
813 cx->blk_loop.state_u.ary.ary = NULL; \
814 cx->blk_loop.state_u.ary.ix = 0; \
815 cx->blk_loop.itervar_u.svp = (SV**)(ivar); \
816 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
817 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
818 PL_tmps_floor = PL_tmps_ix; \
819 cx->blk_loop.itersave = isave; \
820 PUSHLOOP_FOR_setpad(cx);
822 #define POPLOOP(cx) \
823 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix); \
824 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \
825 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.cur); \
826 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.end); \
828 else if (CxTYPE(cx) == CXt_LOOP_FOR) \
829 SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); \
830 if (cx->cx_type & (CXp_FOR_PAD|CXp_FOR_GV)) { \
832 SV **svp = (cx)->blk_loop.itervar_u.svp; \
833 if ((cx->cx_type & CXp_FOR_GV)) \
834 svp = &GvSV((GV*)svp); \
836 *svp = cx->blk_loop.itersave; \
837 SvREFCNT_dec(cursv); \
839 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
841 /* given/when context */
842 struct block_givwhen {
844 SV *defsv_save; /* the original $_ */
847 #define PUSHWHEN(cx) \
848 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
849 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
850 PL_tmps_floor = PL_tmps_ix; \
851 cx->blk_givwhen.leave_op = cLOGOP->op_other;
853 #define PUSHGIVEN(cx, orig_var) \
855 cx->blk_givwhen.defsv_save = orig_var;
857 #define POPWHEN(cx) \
858 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix); \
859 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
861 #define POPGIVEN(cx) \
862 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix); \
863 SvREFCNT_dec(GvSV(PL_defgv)); \
864 GvSV(PL_defgv) = cx->blk_givwhen.defsv_save; \
865 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
868 /* context common to subroutines, evals and loops */
870 U8 blku_type; /* what kind of context this is */
871 U8 blku_gimme; /* is this block running in list context? */
872 U16 blku_u16; /* used by block_sub and block_eval (so far) */
873 I32 blku_oldsp; /* stack pointer to copy stuff down to */
874 COP * blku_oldcop; /* old curcop pointer */
875 I32 blku_oldmarksp; /* mark stack index */
876 I32 blku_oldscopesp; /* scope stack index */
877 PMOP * blku_oldpm; /* values of pattern match vars */
878 SSize_t blku_old_tmpsfloor; /* saved PL_tmps_floor */
879 I32 blku_old_savestack_ix; /* saved PL_savestack_ix */
882 struct block_sub blku_sub;
883 struct block_format blku_format;
884 struct block_eval blku_eval;
885 struct block_loop blku_loop;
886 struct block_givwhen blku_givwhen;
889 #define blk_oldsp cx_u.cx_blk.blku_oldsp
890 #define blk_oldcop cx_u.cx_blk.blku_oldcop
891 #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
892 #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
893 #define blk_oldpm cx_u.cx_blk.blku_oldpm
894 #define blk_gimme cx_u.cx_blk.blku_gimme
895 #define blk_u16 cx_u.cx_blk.blku_u16
896 #define blk_sub cx_u.cx_blk.blk_u.blku_sub
897 #define blk_format cx_u.cx_blk.blk_u.blku_format
898 #define blk_eval cx_u.cx_blk.blk_u.blku_eval
899 #define blk_loop cx_u.cx_blk.blk_u.blku_loop
900 #define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
902 #define DEBUG_CX(action) \
904 Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) (save %ld,%ld) at %s:%d\n",\
907 PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \
908 (long)PL_scopestack_ix, \
909 (long)(cxstack[cxstack_ix].blk_oldscopesp), \
910 (long)PL_savestack_ix, \
911 (long)(cxstack[cxstack_ix].cx_u.cx_blk.blku_old_savestack_ix),\
912 __FILE__, __LINE__));
915 #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
917 cx->blk_oldsp = sp - PL_stack_base, \
918 cx->blk_oldcop = PL_curcop, \
919 cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
920 cx->blk_oldscopesp = PL_scopestack_ix, \
921 cx->blk_oldpm = PL_curpm, \
922 cx->blk_gimme = (U8)gimme; \
925 /* Exit a block (RETURN and LAST). */
926 #define POPBLOCK(cx,pm) \
928 cx = &cxstack[cxstack_ix--], \
929 newsp = PL_stack_base + cx->blk_oldsp, \
930 PL_curcop = cx->blk_oldcop, \
931 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
932 PL_scopestack_ix = cx->blk_oldscopesp, \
933 pm = cx->blk_oldpm, \
934 gimme = cx->blk_gimme;
936 /* Continue a block elsewhere (NEXT and REDO). */
937 #define TOPBLOCK(cx) \
939 cx = &cxstack[cxstack_ix], \
940 PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
941 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
942 PL_scopestack_ix = cx->blk_oldscopesp, \
943 PL_curpm = cx->blk_oldpm;
945 /* substitution context */
947 U8 sbu_type; /* what kind of context this is */
949 U16 sbu_rxtainted; /* matches struct block */
952 SSize_t sbu_maxiters;
962 #define sb_iters cx_u.cx_subst.sbu_iters
963 #define sb_maxiters cx_u.cx_subst.sbu_maxiters
964 #define sb_rflags cx_u.cx_subst.sbu_rflags
965 #define sb_oldsave cx_u.cx_subst.sbu_oldsave
966 #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
967 #define sb_orig cx_u.cx_subst.sbu_orig
968 #define sb_dstr cx_u.cx_subst.sbu_dstr
969 #define sb_targ cx_u.cx_subst.sbu_targ
970 #define sb_s cx_u.cx_subst.sbu_s
971 #define sb_m cx_u.cx_subst.sbu_m
972 #define sb_strend cx_u.cx_subst.sbu_strend
973 #define sb_rxres cx_u.cx_subst.sbu_rxres
974 #define sb_rx cx_u.cx_subst.sbu_rx
977 # define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
978 cx->sb_iters = iters, \
979 cx->sb_maxiters = maxiters, \
980 cx->sb_rflags = r_flags, \
981 cx->sb_oldsave = oldsave, \
982 cx->sb_rxtainted = rxtainted, \
983 cx->sb_orig = orig, \
984 cx->sb_dstr = dstr, \
985 cx->sb_targ = targ, \
988 cx->sb_strend = strend, \
989 cx->sb_rxres = NULL, \
991 cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \
992 rxres_save(&cx->sb_rxres, rx); \
993 (void)ReREFCNT_inc(rx); \
994 SvREFCNT_inc_void_NN(targ)
996 # define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
997 rxres_free(&cx->sb_rxres); \
998 ReREFCNT_dec(cx->sb_rx); \
999 SvREFCNT_dec_NN(cx->sb_targ)
1002 #define CxONCE(cx) ((cx)->cx_type & CXp_ONCE)
1006 struct block cx_blk;
1007 struct subst cx_subst;
1010 #define cx_type cx_u.cx_subst.sbu_type
1012 /* If you re-order these, there is also an array of uppercase names in perl.h
1013 and a static array of context names in pp_ctl.c */
1014 #define CXTYPEMASK 0xf
1018 /* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a
1019 jump table in pp_ctl.c
1020 The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c
1023 /* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */
1024 #define CXt_LOOP_FOR 4
1025 #define CXt_LOOP_PLAIN 5
1026 #define CXt_LOOP_LAZYSV 6
1027 #define CXt_LOOP_LAZYIV 7
1029 #define CXt_FORMAT 9
1031 #define CXt_SUBST 11
1032 /* SUBST doesn't feature in all switch statements. */
1034 /* private flags for CXt_SUB and CXt_NULL
1035 However, this is checked in many places which do not check the type, so
1036 this bit needs to be kept clear for most everything else. For reasons I
1037 haven't investigated, it can coexist with CXp_FOR_DEF */
1038 #define CXp_MULTICALL 0x10 /* part of a multicall (so don't
1039 tear down context on exit). */
1041 /* private flags for CXt_SUB and CXt_FORMAT */
1042 #define CXp_HASARGS 0x20
1043 #define CXp_SUB_RE 0x40 /* code called within regex, i.e. (?{}) */
1044 #define CXp_SUB_RE_FAKE 0x80 /* fake sub CX for (?{}) in current scope */
1046 /* private flags for CXt_EVAL */
1047 #define CXp_REAL 0x20 /* truly eval'', not a lookalike */
1048 #define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */
1050 /* private flags for CXt_LOOP */
1051 #define CXp_FOR_DEF 0x10 /* foreach using $_ */
1052 #define CXp_FOR_LVREF 0x20 /* foreach using \$var */
1053 #define CXp_FOR_GV 0x40 /* foreach using package var */
1054 #define CXp_FOR_PAD 0x80 /* foreach using lexical var */
1055 #define CxPADLOOP(c) ((c)->cx_type & CXp_FOR_PAD)
1057 /* private flags for CXt_SUBST */
1058 #define CXp_ONCE 0x10 /* What was sbu_once in struct subst */
1060 #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
1061 #define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4)
1062 #define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
1064 #define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
1065 == (CXt_EVAL|CXp_REAL))
1066 #define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
1067 == (CXt_EVAL|CXp_TRYBLOCK))
1068 #define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN)
1069 #define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \
1070 && ((c)->cx_type & CXp_FOR_DEF))
1072 #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
1075 =head1 "Gimme" Values
1079 =for apidoc AmU||G_SCALAR
1080 Used to indicate scalar context. See C<L</GIMME_V>>, C<L</GIMME>>, and
1083 =for apidoc AmU||G_ARRAY
1084 Used to indicate list context. See C<L</GIMME_V>>, C<L</GIMME>> and
1087 =for apidoc AmU||G_VOID
1088 Used to indicate void context. See C<L</GIMME_V>> and L<perlcall>.
1090 =for apidoc AmU||G_DISCARD
1091 Indicates that arguments returned from a callback should be discarded. See
1094 =for apidoc AmU||G_EVAL
1096 Used to force a Perl C<eval> wrapper around a callback. See
1099 =for apidoc AmU||G_NOARGS
1101 Indicates that no arguments are being sent to a callback. See
1112 /* extra flags for Perl_call_* routines */
1113 #define G_DISCARD 4 /* Call FREETMPS.
1114 Don't change this without consulting the
1115 hash actions codes defined in hv.h */
1116 #define G_EVAL 8 /* Assume eval {} around subroutine call. */
1117 #define G_NOARGS 16 /* Don't construct a @_ array. */
1118 #define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */
1119 #define G_NODEBUG 64 /* Disable debugging at toplevel. */
1120 #define G_METHOD 128 /* Calling method. */
1121 #define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
1123 #define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef
1124 A special case for UNSHIFT in
1125 Perl_magic_methcall(). */
1126 #define G_WRITING_TO_STDERR 1024 /* Perl_write_to_stderr() is calling
1127 Perl_magic_methcall(). */
1128 #define G_RE_REPARSING 0x800 /* compiling a run-time /(?{..})/ */
1129 #define G_METHOD_NAMED 4096 /* calling named method, eg without :: or ' */
1131 /* flag bits for PL_in_eval */
1132 #define EVAL_NULL 0 /* not in an eval */
1133 #define EVAL_INEVAL 1 /* some enclosing scope is an eval */
1134 #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
1135 #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
1136 #define EVAL_INREQUIRE 8 /* The code is being required. */
1137 #define EVAL_RE_REPARSING 0x10 /* eval_sv() called with G_RE_REPARSING */
1139 /* Support for switching (stack and block) contexts.
1140 * This ensures magic doesn't invalidate local stack and cx pointers.
1143 #define PERLSI_UNKNOWN -1
1144 #define PERLSI_UNDEF 0
1145 #define PERLSI_MAIN 1
1146 #define PERLSI_MAGIC 2
1147 #define PERLSI_SORT 3
1148 #define PERLSI_SIGNAL 4
1149 #define PERLSI_OVERLOAD 5
1150 #define PERLSI_DESTROY 6
1151 #define PERLSI_WARNHOOK 7
1152 #define PERLSI_DIEHOOK 8
1153 #define PERLSI_REQUIRE 9
1154 #define PERLSI_MULTICALL 10
1157 AV * si_stack; /* stack for current runlevel */
1158 PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
1159 struct stackinfo * si_prev;
1160 struct stackinfo * si_next;
1161 I32 si_cxix; /* current context index */
1162 I32 si_cxmax; /* maximum allocated index */
1163 I32 si_type; /* type of runlevel */
1164 I32 si_markoff; /* offset where markstack begins for us.
1165 * currently used only with DEBUGGING,
1166 * but not #ifdef-ed for bincompat */
1169 typedef struct stackinfo PERL_SI;
1171 #define cxstack (PL_curstackinfo->si_cxstack)
1172 #define cxstack_ix (PL_curstackinfo->si_cxix)
1173 #define cxstack_max (PL_curstackinfo->si_cxmax)
1176 # define SET_MARK_OFFSET \
1177 PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
1179 # define SET_MARK_OFFSET NOOP
1182 #define PUSHSTACKi(type) \
1184 PERL_SI *next = PL_curstackinfo->si_next; \
1186 int i = 0; PERL_SI *p = PL_curstackinfo; \
1187 while (p) { i++; p = p->si_prev; } \
1188 Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \
1189 i, __FILE__, __LINE__);}) \
1191 next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
1192 next->si_prev = PL_curstackinfo; \
1193 PL_curstackinfo->si_next = next; \
1195 next->si_type = type; \
1196 next->si_cxix = -1; \
1197 AvFILLp(next->si_stack) = 0; \
1198 SWITCHSTACK(PL_curstack,next->si_stack); \
1199 PL_curstackinfo = next; \
1203 #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
1205 /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
1206 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
1210 PERL_SI * const prev = PL_curstackinfo->si_prev; \
1212 int i = -1; PERL_SI *p = PL_curstackinfo; \
1213 while (p) { i++; p = p->si_prev; } \
1214 Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \
1215 i, __FILE__, __LINE__);}) \
1217 Perl_croak_popstack(); \
1219 SWITCHSTACK(PL_curstack,prev->si_stack); \
1220 /* don't free prev here, free them all at the END{} */ \
1221 PL_curstackinfo = prev; \
1224 #define POPSTACK_TO(s) \
1226 while (PL_curstack != s) { \
1232 #define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
1233 #define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
1236 =head1 Multicall Functions
1238 =for apidoc Ams||dMULTICALL
1239 Declare local variables for a multicall. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
1241 =for apidoc Ams||PUSH_MULTICALL
1242 Opening bracket for a lightweight callback.
1243 See L<perlcall/LIGHTWEIGHT CALLBACKS>.
1245 =for apidoc Ams||MULTICALL
1246 Make a lightweight callback. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
1248 =for apidoc Ams||POP_MULTICALL
1249 Closing bracket for a lightweight callback.
1250 See L<perlcall/LIGHTWEIGHT CALLBACKS>.
1255 #define dMULTICALL \
1256 SV **newsp; /* set by POPBLOCK */ \
1259 OP *multicall_cop; \
1260 bool multicall_oldcatch; \
1261 U8 hasargs = 0 /* used by PUSHSUB */
1263 #define PUSH_MULTICALL(the_cv) \
1264 PUSH_MULTICALL_FLAGS(the_cv, 0)
1266 /* Like PUSH_MULTICALL, but allows you to specify extra flags
1267 * for the CX stack entry (this isn't part of the public API) */
1269 #define PUSH_MULTICALL_FLAGS(the_cv, flags) \
1271 CV * const _nOnclAshIngNamE_ = the_cv; \
1272 CV * const cv = _nOnclAshIngNamE_; \
1273 PADLIST * const padlist = CvPADLIST(cv); \
1274 multicall_oldcatch = CATCH_GET; \
1276 PUSHSTACKi(PERLSI_MULTICALL); \
1277 PUSHBLOCK(cx, (CXt_SUB|CXp_MULTICALL|flags), PL_stack_sp); \
1279 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
1281 if (!(flags & CXp_SUB_RE_FAKE)) \
1283 if (CvDEPTH(cv) >= 2) { \
1284 PERL_STACK_OVERFLOW_CHECK(); \
1285 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1287 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
1288 multicall_cv = cv; \
1289 multicall_cop = CvSTART(cv); \
1294 PL_op = multicall_cop; \
1298 #define POP_MULTICALL \
1300 cx = &cxstack[cxstack_ix]; \
1301 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
1302 LEAVESUB(multicall_cv); \
1303 POPBLOCK(cx,PL_curpm); \
1304 /* includes partial unrolled POPSUB(): */ \
1305 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix); \
1306 PL_comppad = cx->blk_sub.prevcomppad; \
1307 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
1309 CATCH_SET(multicall_oldcatch); \
1313 /* Change the CV of an already-pushed MULTICALL CxSUB block.
1314 * (this isn't part of the public API) */
1316 #define CHANGE_MULTICALL_FLAGS(the_cv, flags) \
1318 CV * const _nOnclAshIngNamE_ = the_cv; \
1319 CV * const cv = _nOnclAshIngNamE_; \
1320 PADLIST * const padlist = CvPADLIST(cv); \
1321 cx = &cxstack[cxstack_ix]; \
1322 assert(cx->cx_type & CXp_MULTICALL); \
1323 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
1324 LEAVESUB(multicall_cv); \
1325 cx->cx_type = (CXt_SUB|CXp_MULTICALL|flags); \
1327 /* save a few things that we don't want PUSHSUB to zap */ \
1328 PAD * const prevcomppad = cx->blk_sub.prevcomppad; \
1329 SSize_t old_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
1330 SSize_t floor = PL_tmps_floor; \
1332 /* undo the stuff that PUSHSUB zapped */ \
1333 cx->blk_sub.prevcomppad = prevcomppad ; \
1334 cx->cx_u.cx_blk.blku_old_tmpsfloor = old_floor; \
1335 PL_tmps_floor = floor; \
1337 if (!(flags & CXp_SUB_RE_FAKE)) \
1339 if (CvDEPTH(cv) >= 2) { \
1340 PERL_STACK_OVERFLOW_CHECK(); \
1341 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1343 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
1344 multicall_cv = cv; \
1345 multicall_cop = CvSTART(cv); \
1348 * ex: set ts=8 sts=4 sw=4 et: