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Introduce SvCANEXISTDELETE in pp.h, which simplify the logic in pp_helem and pp_hslice
[perl5.git] / scope.c
CommitLineData
a0d0e21e 1/* scope.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
LW
5 *
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.
8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * For the fashion of Minas Tirith was such that it was built on seven
13 * levels...
14 *
15 * [p.751 of _The Lord of the Rings_, V/i: "Minas Tirith"]
79072805
LW
16 */
17
ddfa107c 18/* This file contains functions to manipulate several of Perl's stacks;
166f8a29
DM
19 * in particular it contains code to push various types of things onto
20 * the savestack, then to pop them off and perform the correct restorative
21 * action for each one. This corresponds to the cleanup Perl does at
22 * each scope exit.
23 */
24
79072805 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_SCOPE_C
79072805
LW
27#include "perl.h"
28
a0d0e21e 29SV**
864dbfa3 30Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
a0d0e21e 31{
97aff369 32 dVAR;
7918f24d
NC
33
34 PERL_ARGS_ASSERT_STACK_GROW;
35
3280af22 36 PL_stack_sp = sp;
2ce36478 37#ifndef STRESS_REALLOC
3280af22 38 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
2ce36478 39#else
6b88bc9c 40 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
2ce36478 41#endif
3280af22 42 return PL_stack_sp;
a0d0e21e
LW
43}
44
2ce36478
SM
45#ifndef STRESS_REALLOC
46#define GROW(old) ((old) * 3 / 2)
47#else
48#define GROW(old) ((old) + 1)
49#endif
50
e336de0d 51PERL_SI *
864dbfa3 52Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
e336de0d 53{
97aff369 54 dVAR;
e336de0d 55 PERL_SI *si;
a02a5408 56 Newx(si, 1, PERL_SI);
e336de0d
GS
57 si->si_stack = newAV();
58 AvREAL_off(si->si_stack);
59 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
3280af22 60 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
e336de0d
GS
61 AvFILLp(si->si_stack) = 0;
62 si->si_prev = 0;
63 si->si_next = 0;
64 si->si_cxmax = cxitems - 1;
65 si->si_cxix = -1;
e788e7d3 66 si->si_type = PERLSI_UNDEF;
a02a5408 67 Newx(si->si_cxstack, cxitems, PERL_CONTEXT);
9965345d
JH
68 /* Without any kind of initialising PUSHSUBST()
69 * in pp_subst() will read uninitialised heap. */
7e337ee0 70 PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT);
e336de0d
GS
71 return si;
72}
73
79072805 74I32
864dbfa3 75Perl_cxinc(pTHX)
79072805 76{
97aff369 77 dVAR;
a3b680e6 78 const IV old_max = cxstack_max;
2ce36478 79 cxstack_max = GROW(cxstack_max);
c09156bb 80 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
9965345d
JH
81 /* Without any kind of initialising deep enough recursion
82 * will end up reading uninitialised PERL_CONTEXTs. */
7e337ee0 83 PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
79072805
LW
84 return cxstack_ix + 1;
85}
86
79072805 87void
864dbfa3 88Perl_push_scope(pTHX)
79072805 89{
97aff369 90 dVAR;
3280af22
NIS
91 if (PL_scopestack_ix == PL_scopestack_max) {
92 PL_scopestack_max = GROW(PL_scopestack_max);
93 Renew(PL_scopestack, PL_scopestack_max, I32);
79072805 94 }
3280af22 95 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
79072805
LW
96
97}
98
99void
864dbfa3 100Perl_pop_scope(pTHX)
79072805 101{
97aff369 102 dVAR;
35a4481c 103 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
8990e307 104 LEAVE_SCOPE(oldsave);
79072805
LW
105}
106
107void
864dbfa3 108Perl_markstack_grow(pTHX)
a0d0e21e 109{
97aff369 110 dVAR;
35a4481c
AL
111 const I32 oldmax = PL_markstack_max - PL_markstack;
112 const I32 newmax = GROW(oldmax);
a0d0e21e 113
3280af22
NIS
114 Renew(PL_markstack, newmax, I32);
115 PL_markstack_ptr = PL_markstack + oldmax;
116 PL_markstack_max = PL_markstack + newmax;
a0d0e21e
LW
117}
118
119void
864dbfa3 120Perl_savestack_grow(pTHX)
79072805 121{
97aff369 122 dVAR;
8aacddc1 123 PL_savestack_max = GROW(PL_savestack_max) + 4;
3280af22 124 Renew(PL_savestack, PL_savestack_max, ANY);
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LW
125}
126
4b3c1a47
AE
127void
128Perl_savestack_grow_cnt(pTHX_ I32 need)
129{
97aff369 130 dVAR;
4b3c1a47
AE
131 PL_savestack_max = PL_savestack_ix + need;
132 Renew(PL_savestack, PL_savestack_max, ANY);
133}
134
2ce36478
SM
135#undef GROW
136
79072805 137void
864dbfa3 138Perl_tmps_grow(pTHX_ I32 n)
677b06e3 139{
97aff369 140 dVAR;
677b06e3
GS
141#ifndef STRESS_REALLOC
142 if (n < 128)
143 n = (PL_tmps_max < 512) ? 128 : 512;
144#endif
145 PL_tmps_max = PL_tmps_ix + n + 1;
146 Renew(PL_tmps_stack, PL_tmps_max, SV*);
147}
148
149
150void
864dbfa3 151Perl_free_tmps(pTHX)
79072805 152{
97aff369 153 dVAR;
79072805 154 /* XXX should tmps_floor live in cxstack? */
35a4481c 155 const I32 myfloor = PL_tmps_floor;
3280af22 156 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
901017d6 157 SV* const sv = PL_tmps_stack[PL_tmps_ix];
a0714e2c 158 PL_tmps_stack[PL_tmps_ix--] = NULL;
8aacddc1 159 if (sv && sv != &PL_sv_undef) {
463ee0b2 160 SvTEMP_off(sv);
8990e307 161 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 162 }
79072805
LW
163 }
164}
165
76e3520e 166STATIC SV *
af7df257 167S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 168{
97aff369 169 dVAR;
901017d6 170 SV * const osv = *sptr;
561b68a9 171 register SV * const sv = *sptr = newSV(0);
79072805 172
7918f24d
NC
173 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
174
a0d0e21e 175 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
a0d0e21e 176 if (SvGMAGICAL(osv)) {
35a4481c 177 const bool oldtainted = PL_tainted;
a0d0e21e 178 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 179 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
3280af22 180 PL_tainted = oldtainted;
a0d0e21e 181 }
af7df257 182 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
79072805
LW
183 }
184 return sv;
185}
186
dfcd3de5
NC
187void
188Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
189{
190 dVAR;
191 SSCHECK(3);
192 SSPUSHPTR(ptr1);
193 SSPUSHPTR(ptr2);
194 SSPUSHINT(type);
195}
196
7a4c00b4 197SV *
864dbfa3 198Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 199{
97aff369 200 dVAR;
fb4fc1fa 201 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
202
203 PERL_ARGS_ASSERT_SAVE_SCALAR;
204
27cc343c 205 PL_localizing = 1;
0cbee0a4 206 SvGETMAGIC(*sptr);
27cc343c 207 PL_localizing = 0;
e22024d3 208 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 209 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
210}
211
f4dd75d9 212/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
213 * restore a global SV to its prior contents, freeing new value. */
214void
864dbfa3 215Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 216{
97aff369 217 dVAR;
7918f24d
NC
218
219 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
220
e22024d3 221 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
222}
223
f4dd75d9
GS
224/* Like save_pptr(), but also Safefree()s the new value if it is different
225 * from the old one. Can be used to restore a global char* to its prior
226 * contents, freeing new value. */
227void
228Perl_save_generic_pvref(pTHX_ char **str)
229{
97aff369 230 dVAR;
7918f24d
NC
231
232 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
233
e22024d3 234 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
235}
236
05ec9bb3
NIS
237/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
238 * Can be used to restore a shared global char* to its prior
239 * contents, freeing new value. */
240void
241Perl_save_shared_pvref(pTHX_ char **str)
242{
97aff369 243 dVAR;
7918f24d
NC
244
245 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
246
e22024d3 247 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
248}
249
14f338dc
DM
250/* set the SvFLAGS specified by mask to the values in val */
251
252void
253Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
254{
97aff369 255 dVAR;
7918f24d
NC
256
257 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
258
14f338dc
DM
259 SSCHECK(4);
260 SSPUSHPTR(sv);
261 SSPUSHINT(mask);
262 SSPUSHINT(val);
263 SSPUSHINT(SAVEt_SET_SVFLAGS);
264}
265
79072805 266void
864dbfa3 267Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 268{
97aff369 269 dVAR;
7918f24d
NC
270
271 PERL_ARGS_ASSERT_SAVE_GP;
272
e22024d3 273 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 274
5f05dabc 275 if (empty) {
12816592 276 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 277
fae75791 278 if (GvCVu(gv))
e1a479c5 279 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
280 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
281 gp->gp_io = newIO();
282 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
283 }
72651472
NC
284#ifdef PERL_DONT_CREATE_GVSV
285 if (gv == PL_errgv) {
286 /* We could scatter this logic everywhere by changing the
287 definition of ERRSV from GvSV() to GvSVn(), but it seems more
288 efficient to do this check once here. */
289 gp->gp_sv = newSV(0);
290 }
291#endif
12816592 292 GvGP(gv) = gp;
5f05dabc
PP
293 }
294 else {
44a8e56a 295 gp_ref(GvGP(gv));
5f05dabc
PP
296 GvINTRO_on(gv);
297 }
79072805 298}
79072805 299
79072805 300AV *
864dbfa3 301Perl_save_ary(pTHX_ GV *gv)
79072805 302{
97aff369 303 dVAR;
901017d6 304 AV * const oav = GvAVn(gv);
67a38de0 305 AV *av;
fb73857a 306
7918f24d
NC
307 PERL_ARGS_ASSERT_SAVE_ARY;
308
67a38de0
NIS
309 if (!AvREAL(oav) && AvREIFY(oav))
310 av_reify(oav);
e22024d3 311 save_pushptrptr(gv, oav, SAVEt_AV);
79072805 312
4608196e 313 GvAV(gv) = NULL;
fb73857a 314 av = GvAVn(gv);
0cbee0a4 315 if (SvMAGIC(oav))
9711599e 316 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 317 return av;
79072805
LW
318}
319
320HV *
864dbfa3 321Perl_save_hash(pTHX_ GV *gv)
79072805 322{
97aff369 323 dVAR;
fb73857a
PP
324 HV *ohv, *hv;
325
7918f24d
NC
326 PERL_ARGS_ASSERT_SAVE_HASH;
327
e22024d3 328 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
79072805 329
4608196e 330 GvHV(gv) = NULL;
fb73857a 331 hv = GvHVn(gv);
0cbee0a4 332 if (SvMAGIC(ohv))
9711599e 333 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 334 return hv;
79072805
LW
335}
336
337void
864dbfa3 338Perl_save_item(pTHX_ register SV *item)
79072805 339{
97aff369 340 dVAR;
901017d6 341 register SV * const sv = newSVsv(item);
79072805 342
7918f24d
NC
343 PERL_ARGS_ASSERT_SAVE_ITEM;
344
e22024d3
NC
345 save_pushptrptr(item, /* remember the pointer */
346 sv, /* remember the value */
347 SAVEt_ITEM);
79072805
LW
348}
349
350void
1409bc06 351Perl_save_bool(pTHX_ bool *boolp)
79072805 352{
97aff369 353 dVAR;
7918f24d 354
1409bc06 355 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 356
79072805 357 SSCHECK(3);
1409bc06
NC
358 SSPUSHBOOL(*boolp);
359 SSPUSHPTR(boolp);
360 SSPUSHINT(SAVEt_BOOL);
361}
362
7623d426
NC
363void
364Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
365{
366 dVAR;
367 SSCHECK(3);
368 SSPUSHINT(i);
369 SSPUSHPTR(ptr);
370 SSPUSHINT(type);
79072805
LW
371}
372
373void
1409bc06 374Perl_save_int(pTHX_ int *intp)
9febdf04 375{
97aff369 376 dVAR;
7918f24d 377
1409bc06 378 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 379
1409bc06 380 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
381}
382
383void
58188858
RGS
384Perl_save_I8(pTHX_ I8 *bytep)
385{
386 dVAR;
7918f24d
NC
387
388 PERL_ARGS_ASSERT_SAVE_I8;
389
1409bc06 390 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
58188858
RGS
391}
392
393void
87a84751
JH
394Perl_save_I16(pTHX_ I16 *intp)
395{
396 dVAR;
7918f24d
NC
397
398 PERL_ARGS_ASSERT_SAVE_I16;
399
1409bc06 400 save_pushi32ptr(*intp, intp, SAVEt_I16);
87a84751
JH
401}
402
403void
864dbfa3 404Perl_save_I32(pTHX_ I32 *intp)
79072805 405{
97aff369 406 dVAR;
7918f24d
NC
407
408 PERL_ARGS_ASSERT_SAVE_I32;
409
1409bc06 410 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
411}
412
85e6fe83
LW
413/* Cannot use save_sptr() to store a char* since the SV** cast will
414 * force word-alignment and we'll miss the pointer.
415 */
416void
864dbfa3 417Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 418{
97aff369 419 dVAR;
7918f24d
NC
420
421 PERL_ARGS_ASSERT_SAVE_PPTR;
422
e22024d3 423 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
424}
425
79072805 426void
146174a9
CB
427Perl_save_vptr(pTHX_ void *ptr)
428{
97aff369 429 dVAR;
7918f24d
NC
430
431 PERL_ARGS_ASSERT_SAVE_VPTR;
432
e22024d3 433 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
434}
435
436void
864dbfa3 437Perl_save_sptr(pTHX_ SV **sptr)
79072805 438{
97aff369 439 dVAR;
7918f24d
NC
440
441 PERL_ARGS_ASSERT_SAVE_SPTR;
442
e22024d3 443 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
444}
445
c3564e5c 446void
09edbca0 447Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 448{
97aff369 449 dVAR;
c3564e5c 450 SSCHECK(4);
f3548bdc 451 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 452 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 453 SSPUSHPTR(PL_comppad);
c3564e5c 454 SSPUSHLONG((long)off);
09edbca0 455 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
456}
457
79072805 458void
864dbfa3 459Perl_save_hptr(pTHX_ HV **hptr)
79072805 460{
97aff369 461 dVAR;
7918f24d
NC
462
463 PERL_ARGS_ASSERT_SAVE_HPTR;
464
e22024d3 465 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
466}
467
468void
864dbfa3 469Perl_save_aptr(pTHX_ AV **aptr)
79072805 470{
97aff369 471 dVAR;
7918f24d
NC
472
473 PERL_ARGS_ASSERT_SAVE_APTR;
474
e22024d3 475 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
476}
477
478void
2fd8beea 479Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 480{
97aff369 481 dVAR;
8990e307 482 SSCHECK(2);
2fd8beea
NC
483 SSPUSHPTR(ptr);
484 SSPUSHINT(type);
8990e307
LW
485}
486
487void
864dbfa3 488Perl_save_clearsv(pTHX_ SV **svp)
8990e307 489{
97aff369 490 dVAR;
7918f24d
NC
491
492 PERL_ARGS_ASSERT_SAVE_CLEARSV;
493
f3548bdc 494 ASSERT_CURPAD_ACTIVE("save_clearsv");
8990e307 495 SSCHECK(2);
3280af22 496 SSPUSHLONG((long)(svp-PL_curpad));
8990e307 497 SSPUSHINT(SAVEt_CLEARSV);
d9d18af6 498 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
499}
500
501void
864dbfa3 502Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 503{
97aff369 504 dVAR;
7918f24d
NC
505
506 PERL_ARGS_ASSERT_SAVE_DELETE;
507
85a721ca 508 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
509}
510
511void
12ab1f58
JH
512Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
513{
514 dVAR;
7918f24d
NC
515
516 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
517
12ab1f58
JH
518 SSCHECK(3);
519 SSPUSHDPTR(f);
520 SSPUSHPTR(p);
521 SSPUSHINT(SAVEt_DESTRUCTOR);
522}
523
524void
146174a9
CB
525Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
526{
97aff369 527 dVAR;
146174a9
CB
528 SSCHECK(3);
529 SSPUSHDXPTR(f);
530 SSPUSHPTR(p);
531 SSPUSHINT(SAVEt_DESTRUCTOR_X);
532}
533
534void
da8315f8
NC
535Perl_save_hints(pTHX)
536{
537 dVAR;
538 if (PL_compiling.cop_hints_hash) {
539 HINTS_REFCNT_LOCK;
540 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
541 HINTS_REFCNT_UNLOCK;
542 }
da8315f8 543 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
544 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
545 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 546 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
547 } else {
548 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 549 }
be84297e
NC
550}
551
552static void
553S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
554 const int type)
555{
556 SSCHECK(4);
557 SSPUSHPTR(ptr1);
558 SSPUSHINT(i);
559 SSPUSHPTR(ptr2);
560 SSPUSHINT(type);
da8315f8
NC
561}
562
563void
59413342 564Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
4e4c362e 565{
97aff369 566 dVAR;
bfc4de9f 567 SV *sv;
7918f24d
NC
568
569 PERL_ARGS_ASSERT_SAVE_AELEM;
570
0cbee0a4 571 SvGETMAGIC(*sptr);
be84297e
NC
572 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
573 SAVEt_AELEM);
5dd42e15
DM
574 /* if it gets reified later, the restore will have the wrong refcnt */
575 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 576 SvREFCNT_inc_void(*sptr);
af7df257 577 save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
bfc4de9f
DM
578 sv = *sptr;
579 /* If we're localizing a tied array element, this new sv
580 * won't actually be stored in the array - so it won't get
581 * reaped when the localize ends. Ensure it gets reaped by
582 * mortifying it instead. DAPM */
583 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
584 sv_2mortal(sv);
4e4c362e
GS
585}
586
587void
af7df257 588Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 589{
97aff369 590 dVAR;
bfc4de9f 591 SV *sv;
7918f24d 592
af7df257 593 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 594
0cbee0a4 595 SvGETMAGIC(*sptr);
4e4c362e 596 SSCHECK(4);
b37c2d43 597 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 598 SSPUSHPTR(newSVsv(key));
4e4c362e
GS
599 SSPUSHPTR(SvREFCNT_inc(*sptr));
600 SSPUSHINT(SAVEt_HELEM);
af7df257 601 save_scalar_at(sptr, flags);
bfc4de9f
DM
602 sv = *sptr;
603 /* If we're localizing a tied hash element, this new sv
604 * won't actually be stored in the hash - so it won't get
605 * reaped when the localize ends. Ensure it gets reaped by
606 * mortifying it instead. DAPM */
607 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
608 sv_2mortal(sv);
4e4c362e
GS
609}
610
2053acbf
NC
611SV*
612Perl_save_svref(pTHX_ SV **sptr)
613{
614 dVAR;
7918f24d
NC
615
616 PERL_ARGS_ASSERT_SAVE_SVREF;
617
2053acbf 618 SvGETMAGIC(*sptr);
e22024d3 619 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 620 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
621}
622
455ece5e 623I32
864dbfa3 624Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 625{
97aff369 626 dVAR;
35a4481c 627 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 628 - (char*)PL_savestack);
35a4481c 629 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
455ece5e 630
1bb4c835 631 SSGROW(elems + 2);
455ece5e
AD
632
633 PL_savestack_ix += elems;
634 SSPUSHINT(elems);
635 SSPUSHINT(SAVEt_ALLOC);
636 return start;
637}
638
462e5cf6 639void
864dbfa3 640Perl_leave_scope(pTHX_ I32 base)
79072805 641{
97aff369 642 dVAR;
79072805
LW
643 register SV *sv;
644 register SV *value;
645 register GV *gv;
646 register AV *av;
647 register HV *hv;
20454177 648 void* ptr;
f4dd75d9 649 register char* str;
161b7d16 650 I32 i;
302c0c93
NC
651 /* Localise the effects of the TAINT_NOT inside the loop. */
652 const bool was = PL_tainted;
79072805
LW
653
654 if (base < -1)
cea2e8a9 655 Perl_croak(aTHX_ "panic: corrupt saved stack index");
3280af22 656 while (PL_savestack_ix > base) {
c6ae7647
NC
657 TAINT_NOT;
658
79072805
LW
659 switch (SSPOPINT) {
660 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
661 value = MUTABLE_SV(SSPOPPTR);
662 sv = MUTABLE_SV(SSPOPPTR);
79072805 663 sv_replace(sv,value);
3280af22 664 PL_localizing = 2;
79072805 665 SvSETMAGIC(sv);
3280af22 666 PL_localizing = 0;
79072805 667 break;
8aacddc1 668 case SAVEt_SV: /* scalar reference */
ad64d0ec 669 value = MUTABLE_SV(SSPOPPTR);
159b6efe 670 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 671 ptr = &GvSV(gv);
502c6561 672 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
673 restore_sv:
674 sv = *(SV**)ptr;
2053acbf
NC
675 *(SV**)ptr = value;
676 SvREFCNT_dec(sv);
677 PL_localizing = 2;
678 SvSETMAGIC(value);
679 PL_localizing = 0;
680 SvREFCNT_dec(value);
681 if (av) /* actually an av, hv or gv */
682 SvREFCNT_dec(av);
683 break;
8aacddc1 684 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 685 ptr = SSPOPPTR;
b03d03b0 686 str = (char*)SSPOPPTR;
f4dd75d9
GS
687 if (*(char**)ptr != str) {
688 Safefree(*(char**)ptr);
689 *(char**)ptr = str;
690 }
691 break;
05ec9bb3
NIS
692 case SAVEt_SHARED_PVREF: /* shared pv */
693 str = (char*)SSPOPPTR;
694 ptr = SSPOPPTR;
695 if (*(char**)ptr != str) {
5e54c26f 696#ifdef NETWARE
9ecbcc42 697 PerlMem_free(*(char**)ptr);
5e54c26f 698#else
05ec9bb3 699 PerlMemShared_free(*(char**)ptr);
5e54c26f 700#endif
05ec9bb3
NIS
701 *(char**)ptr = str;
702 }
703 break;
8aacddc1 704 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 705 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 706 ptr = SSPOPPTR;
f4dd75d9
GS
707 sv = *(SV**)ptr;
708 *(SV**)ptr = value;
709 SvREFCNT_dec(sv);
b9d12d37
GS
710 SvREFCNT_dec(value);
711 break;
8aacddc1 712 case SAVEt_AV: /* array reference */
502c6561 713 av = MUTABLE_AV(SSPOPPTR);
159b6efe 714 gv = MUTABLE_GV(SSPOPPTR);
fb73857a 715 if (GvAV(gv)) {
c4a7531d 716 SvREFCNT_dec(GvAV(gv));
fb73857a 717 }
8aacddc1 718 GvAV(gv) = av;
fb73857a 719 if (SvMAGICAL(av)) {
3280af22 720 PL_localizing = 2;
ad64d0ec 721 SvSETMAGIC(MUTABLE_SV(av));
3280af22 722 PL_localizing = 0;
fb73857a 723 }
8aacddc1
NIS
724 break;
725 case SAVEt_HV: /* hash reference */
85fbaab2 726 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 727 gv = MUTABLE_GV(SSPOPPTR);
fb73857a 728 if (GvHV(gv)) {
c4a7531d 729 SvREFCNT_dec(GvHV(gv));
fb73857a 730 }
8aacddc1 731 GvHV(gv) = hv;
fb73857a 732 if (SvMAGICAL(hv)) {
3280af22 733 PL_localizing = 2;
ad64d0ec 734 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 735 PL_localizing = 0;
fb73857a 736 }
8aacddc1 737 break;
79072805
LW
738 case SAVEt_INT: /* int reference */
739 ptr = SSPOPPTR;
740 *(int*)ptr = (int)SSPOPINT;
741 break;
9febdf04
RH
742 case SAVEt_BOOL: /* bool reference */
743 ptr = SSPOPPTR;
744 *(bool*)ptr = (bool)SSPOPBOOL;
745 break;
79072805
LW
746 case SAVEt_I32: /* I32 reference */
747 ptr = SSPOPPTR;
3235b7a3
NC
748#ifdef PERL_DEBUG_READONLY_OPS
749 {
750 const I32 val = SSPOPINT;
751 if (*(I32*)ptr != val)
752 *(I32*)ptr = val;
753 }
754#else
79072805 755 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 756#endif
79072805
LW
757 break;
758 case SAVEt_SPTR: /* SV* reference */
759 ptr = SSPOPPTR;
ad64d0ec 760 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 761 break;
146174a9 762 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
763 case SAVEt_PPTR: /* char* reference */
764 ptr = SSPOPPTR;
765 *(char**)ptr = (char*)SSPOPPTR;
766 break;
79072805
LW
767 case SAVEt_HPTR: /* HV* reference */
768 ptr = SSPOPPTR;
85fbaab2 769 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
770 break;
771 case SAVEt_APTR: /* AV* reference */
772 ptr = SSPOPPTR;
502c6561 773 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 774 break;
fb73857a 775 case SAVEt_GP: /* scalar reference */
79072805 776 ptr = SSPOPPTR;
159b6efe 777 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1
NIS
778 gp_free(gv);
779 GvGP(gv) = (GP*)ptr;
dd69841b
BB
780 /* putting a method back into circulation ("local")*/
781 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
782 mro_method_changed_in(hv);
4633a7c4 783 SvREFCNT_dec(gv);
8aacddc1 784 break;
8990e307
LW
785 case SAVEt_FREESV:
786 ptr = SSPOPPTR;
ad64d0ec 787 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 788 break;
26d9b02f
JH
789 case SAVEt_MORTALIZESV:
790 ptr = SSPOPPTR;
ad64d0ec 791 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 792 break;
8990e307
LW
793 case SAVEt_FREEOP:
794 ptr = SSPOPPTR;
f3548bdc 795 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
796 op_free((OP*)ptr);
797 break;
798 case SAVEt_FREEPV:
799 ptr = SSPOPPTR;
1df70142 800 Safefree(ptr);
8990e307
LW
801 break;
802 case SAVEt_CLEARSV:
3280af22 803 ptr = (void*)&PL_curpad[SSPOPLONG];
8990e307 804 sv = *(SV**)ptr;
dd2155a4
DM
805
806 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
807 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
808 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
809 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
810 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
811 ));
812
bc44cdaf
GS
813 /* Can clear pad variable in place? */
814 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
815 /*
816 * if a my variable that was made readonly is going out of
817 * scope, we want to remove the readonlyness so that it can
818 * go out of scope quietly
8aacddc1 819 */
a26e96df 820 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
821 SvREADONLY_off(sv);
822
6fc92669 823 if (SvTHINKFIRST(sv))
840a7b70 824 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
825 if (SvMAGICAL(sv))
826 mg_free(sv);
8990e307
LW
827
828 switch (SvTYPE(sv)) {
829 case SVt_NULL:
830 break;
831 case SVt_PVAV:
502c6561 832 av_clear(MUTABLE_AV(sv));
8990e307
LW
833 break;
834 case SVt_PVHV:
85fbaab2 835 hv_clear(MUTABLE_HV(sv));
8990e307
LW
836 break;
837 case SVt_PVCV:
cea2e8a9 838 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 839 default:
0c34ef67 840 SvOK_off(sv);
8990e307
LW
841 break;
842 }
d9d18af6 843 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
844 }
845 else { /* Someone has a claim on this, so abandon it. */
35a4481c 846 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 847 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
848 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
849 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 850 default: *(SV**)ptr = newSV(0); break;
8990e307 851 }
53868620 852 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
853 /* preserve pad nature, but also mark as not live
854 * for any closure capturing */
2740392c 855 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
856 }
857 break;
858 case SAVEt_DELETE:
859 ptr = SSPOPPTR;
85fbaab2 860 hv = MUTABLE_HV(ptr);
35d4f826 861 i = SSPOPINT;
8990e307 862 ptr = SSPOPPTR;
35d4f826 863 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 864 SvREFCNT_dec(hv);
8aacddc1 865 Safefree(ptr);
8990e307 866 break;
146174a9
CB
867 case SAVEt_DESTRUCTOR_X:
868 ptr = SSPOPPTR;
acfe0abc 869 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
870 break;
871 case SAVEt_REGCONTEXT:
455ece5e 872 case SAVEt_ALLOC:
161b7d16 873 i = SSPOPINT;
3280af22 874 PL_savestack_ix -= i; /* regexp must have croaked */
a0d0e21e 875 break;
55497cff 876 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 877 i = SSPOPINT;
3280af22 878 PL_stack_sp = PL_stack_base + i;
55497cff 879 break;
ea8d6ae1
DB
880 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
881 i = SSPOPINT;
882 cxstack[i].blk_oldsp = SSPOPINT;
883 break;
161b7d16 884 case SAVEt_AELEM: /* array element */
ad64d0ec 885 value = MUTABLE_SV(SSPOPPTR);
161b7d16 886 i = SSPOPINT;
502c6561 887 av = MUTABLE_AV(SSPOPPTR);
658aef79 888 ptr = av_fetch(av,i,1);
5dd42e15
DM
889 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
890 SvREFCNT_dec(value);
4e4c362e
GS
891 if (ptr) {
892 sv = *(SV**)ptr;
3280af22 893 if (sv && sv != &PL_sv_undef) {
ad64d0ec 894 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 895 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
896 goto restore_sv;
897 }
898 }
899 SvREFCNT_dec(av);
900 SvREFCNT_dec(value);
901 break;
161b7d16 902 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
903 value = MUTABLE_SV(SSPOPPTR);
904 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 905 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 906 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 907 SvREFCNT_dec(sv);
4e4c362e 908 if (ptr) {
35a4481c 909 const SV * const oval = HeVAL((HE*)ptr);
3280af22 910 if (oval && oval != &PL_sv_undef) {
4e4c362e 911 ptr = &HeVAL((HE*)ptr);
ad64d0ec 912 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 913 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 914 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
915 goto restore_sv;
916 }
917 }
918 SvREFCNT_dec(hv);
4e4c362e
GS
919 SvREFCNT_dec(value);
920 break;
462e5cf6 921 case SAVEt_OP:
533c011a 922 PL_op = (OP*)SSPOPPTR;
462e5cf6 923 break;
25eaa213 924 case SAVEt_HINTS:
045ac317 925 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 926 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
927 GvHV(PL_hintgv) = NULL;
928 }
c28fe1ec
NC
929 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
930 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 931 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 932 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 933 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 934 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
935 assert(GvHV(PL_hintgv));
936 } else if (!GvHV(PL_hintgv)) {
937 /* Need to add a new one manually, else gv_fetchpv() can
938 add one in this code:
939
940 if (SvTYPE(gv) == SVt_PVGV) {
941 if (add) {
942 GvMULTI_on(gv);
943 gv_init_sv(gv, sv_type);
944 if (*name=='!' && sv_type == SVt_PVHV && len==1)
945 require_errno(gv);
946 }
947 return gv;
948 }
949
950 and it won't have the magic set. */
951
952 HV *const hv = newHV();
953 hv_magic(hv, NULL, PERL_MAGIC_hints);
954 GvHV(PL_hintgv) = hv;
dfa41748 955 }
5b9c0671 956 assert(GvHV(PL_hintgv));
b3ac6de7 957 break;
cb50131a 958 case SAVEt_COMPPAD:
f3548bdc 959 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 960 if (PL_comppad)
cb50131a
CB
961 PL_curpad = AvARRAY(PL_comppad);
962 else
4608196e 963 PL_curpad = NULL;
cb50131a 964 break;
09edbca0 965 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 966 {
35a4481c 967 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 968 SV **svp;
c3564e5c 969 ptr = SSPOPPTR;
09edbca0
NC
970 assert (ptr);
971 svp = AvARRAY((PAD*)ptr) + off;
972 /* This mortalizing used to be done by POPLOOP() via itersave.
973 But as we have all the information here, we can do it here,
974 save even having to have itersave in the struct. */
975 sv_2mortal(*svp);
ad64d0ec 976 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
977 }
978 break;
8b7059b1
DM
979 case SAVEt_SAVESWITCHSTACK:
980 {
981 dSP;
502c6561
NC
982 AV *const t = MUTABLE_AV(SSPOPPTR);
983 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
984 SWITCHSTACK(t,f);
985 PL_curstackinfo->si_stack = f;
986 }
987 break;
14f338dc
DM
988 case SAVEt_SET_SVFLAGS:
989 {
35a4481c
AL
990 const U32 val = (U32)SSPOPINT;
991 const U32 mask = (U32)SSPOPINT;
ad64d0ec 992 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
993 SvFLAGS(sv) &= ~mask;
994 SvFLAGS(sv) |= val;
995 }
996 break;
95e06916
NC
997
998 /* This would be a mathom, but Perl_save_svref() calls a static
999 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1000 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1001 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1002 ptr = SSPOPPTR;
1003 av = NULL; /* what to refcnt_dec */
1004 goto restore_sv;
95e06916
NC
1005
1006 /* These are only saved in mathoms.c */
1007 case SAVEt_NSTAB:
159b6efe 1008 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1009 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1010 break;
2053acbf
NC
1011 case SAVEt_LONG: /* long reference */
1012 ptr = SSPOPPTR;
1013 *(long*)ptr = (long)SSPOPLONG;
1014 break;
95e06916
NC
1015 case SAVEt_IV: /* IV reference */
1016 ptr = SSPOPPTR;
1017 *(IV*)ptr = (IV)SSPOPIV;
1018 break;
1019
2053acbf
NC
1020 case SAVEt_I16: /* I16 reference */
1021 ptr = SSPOPPTR;
1022 *(I16*)ptr = (I16)SSPOPINT;
1023 break;
1024 case SAVEt_I8: /* I8 reference */
1025 ptr = SSPOPPTR;
1026 *(I8*)ptr = (I8)SSPOPINT;
1027 break;
2053acbf
NC
1028 case SAVEt_DESTRUCTOR:
1029 ptr = SSPOPPTR;
1030 (*SSPOPDPTR)(ptr);
1031 break;
fc15ae8f
NC
1032 case SAVEt_COP_ARYBASE:
1033 ptr = SSPOPPTR;
1034 i = SSPOPINT;
1035 CopARYBASE_set((COP *)ptr, i);
1036 break;
68da3b2f
NC
1037 case SAVEt_COMPILE_WARNINGS:
1038 ptr = SSPOPPTR;
72dc9ed5 1039
68da3b2f
NC
1040 if (!specialWARN(PL_compiling.cop_warnings))
1041 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1042
10edeb5d 1043 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1044 break;
1ade1aa1
NC
1045 case SAVEt_RE_STATE:
1046 {
1047 const struct re_save_state *const state
1048 = (struct re_save_state *)
1049 (PL_savestack + PL_savestack_ix
1050 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1051 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1052
1ade1aa1
NC
1053 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1054 Safefree(PL_reg_start_tmp);
1ade1aa1 1055 }
1ade1aa1
NC
1056 if (PL_reg_poscache != state->re_state_reg_poscache) {
1057 Safefree(PL_reg_poscache);
1ade1aa1 1058 }
46ab3289 1059 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1060 }
1061 break;
7c197c94
DM
1062 case SAVEt_PARSER:
1063 ptr = SSPOPPTR;
1064 parser_free((yy_parser *) ptr);
1065 break;
79072805 1066 default:
cea2e8a9 1067 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1068 }
1069 }
302c0c93
NC
1070
1071 PL_tainted = was;
79072805 1072}
8990e307 1073
8990e307 1074void
864dbfa3 1075Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1076{
97aff369 1077 dVAR;
7918f24d
NC
1078
1079 PERL_ARGS_ASSERT_CX_DUMP;
1080
35ff7856 1081#ifdef DEBUGGING
22c35a8c 1082 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1083 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1084 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1085 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1086 PTR2UV(cx->blk_oldcop));
760ac839
LW
1087 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1088 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1089 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1090 PTR2UV(cx->blk_oldpm));
760ac839 1091 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1092 }
6b35e009 1093 switch (CxTYPE(cx)) {
8990e307
LW
1094 case CXt_NULL:
1095 case CXt_BLOCK:
1096 break;
146174a9 1097 case CXt_FORMAT:
f9c764c5
NC
1098 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1099 PTR2UV(cx->blk_format.cv));
1100 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1101 PTR2UV(cx->blk_format.gv));
1102 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1103 PTR2UV(cx->blk_format.dfoutgv));
1104 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1105 (int)CxHASARGS(cx));
f9c764c5
NC
1106 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1107 PTR2UV(cx->blk_format.retop));
146174a9 1108 break;
8990e307 1109 case CXt_SUB:
146174a9
CB
1110 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1111 PTR2UV(cx->blk_sub.cv));
760ac839 1112 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1113 (long)cx->blk_sub.olddepth);
760ac839 1114 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1115 (int)CxHASARGS(cx));
1116 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1117 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1118 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1119 break;
1120 case CXt_EVAL:
760ac839 1121 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1122 (long)CxOLD_IN_EVAL(cx));
760ac839 1123 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1124 PL_op_name[CxOLD_OP_TYPE(cx)],
1125 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1126 if (cx->blk_eval.old_namesv)
1127 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1128 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1129 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1130 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1131 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1132 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1133 break;
1134
c6fdafd0 1135 case CXt_LOOP_LAZYIV:
d01136d6 1136 case CXt_LOOP_LAZYSV:
3b719c58
NC
1137 case CXt_LOOP_FOR:
1138 case CXt_LOOP_PLAIN:
0cbdab38 1139 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1140 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1141 (long)cx->blk_loop.resetsp);
022eaa24
NC
1142 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1143 PTR2UV(cx->blk_loop.my_op));
146174a9 1144 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
022eaa24 1145 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
d01136d6 1146 /* XXX: not accurate for LAZYSV/IV */
146174a9 1147 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1148 PTR2UV(cx->blk_loop.state_u.ary.ary));
1149 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1150 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1151 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1152 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1153 break;
1154
1155 case CXt_SUBST:
760ac839 1156 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1157 (long)cx->sb_iters);
760ac839 1158 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1159 (long)cx->sb_maxiters);
35ef4773
GS
1160 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1161 (long)cx->sb_rflags);
760ac839 1162 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1163 (long)CxONCE(cx));
760ac839 1164 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1165 cx->sb_orig);
146174a9
CB
1166 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1167 PTR2UV(cx->sb_dstr));
1168 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1169 PTR2UV(cx->sb_targ));
1170 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1171 PTR2UV(cx->sb_s));
1172 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1173 PTR2UV(cx->sb_m));
1174 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1175 PTR2UV(cx->sb_strend));
1176 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1177 PTR2UV(cx->sb_rxres));
8990e307
LW
1178 break;
1179 }
65e66c80 1180#else
96a5add6 1181 PERL_UNUSED_CONTEXT;
65e66c80 1182 PERL_UNUSED_ARG(cx);
17c3b450 1183#endif /* DEBUGGING */
35ff7856 1184}
241d1a3b
NC
1185
1186/*
1187 * Local variables:
1188 * c-indentation-style: bsd
1189 * c-basic-offset: 4
1190 * indent-tabs-mode: t
1191 * End:
1192 *
37442d52
RGS
1193 * ex: set ts=8 sts=4 sw=4 noet:
1194 */