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Add a new SAVEf_KEEPOLDELEM flag to save_scalar_at() and save_{a,h}elem_flags()
[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);
79072805
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;
75d34a09
VP
170 SV * osv;
171 register SV *sv;
79072805 172
7918f24d
NC
173 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
174
75d34a09
VP
175 osv = *sptr;
176 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
177
a0d0e21e 178 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
a0d0e21e 179 if (SvGMAGICAL(osv)) {
35a4481c 180 const bool oldtainted = PL_tainted;
a0d0e21e 181 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 182 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
3280af22 183 PL_tainted = oldtainted;
a0d0e21e 184 }
75d34a09
VP
185 if (!(flags & SAVEf_KEEPOLDELEM))
186 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
79072805 187 }
75d34a09 188
79072805
LW
189 return sv;
190}
191
dfcd3de5
NC
192void
193Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
194{
195 dVAR;
196 SSCHECK(3);
197 SSPUSHPTR(ptr1);
198 SSPUSHPTR(ptr2);
199 SSPUSHINT(type);
200}
201
7a4c00b4 202SV *
864dbfa3 203Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 204{
97aff369 205 dVAR;
fb4fc1fa 206 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
207
208 PERL_ARGS_ASSERT_SAVE_SCALAR;
209
27cc343c 210 PL_localizing = 1;
0cbee0a4 211 SvGETMAGIC(*sptr);
27cc343c 212 PL_localizing = 0;
e22024d3 213 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 214 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
215}
216
f4dd75d9 217/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
218 * restore a global SV to its prior contents, freeing new value. */
219void
864dbfa3 220Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 221{
97aff369 222 dVAR;
7918f24d
NC
223
224 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
225
e22024d3 226 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
227}
228
f4dd75d9
GS
229/* Like save_pptr(), but also Safefree()s the new value if it is different
230 * from the old one. Can be used to restore a global char* to its prior
231 * contents, freeing new value. */
232void
233Perl_save_generic_pvref(pTHX_ char **str)
234{
97aff369 235 dVAR;
7918f24d
NC
236
237 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
238
e22024d3 239 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
240}
241
05ec9bb3
NIS
242/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
243 * Can be used to restore a shared global char* to its prior
244 * contents, freeing new value. */
245void
246Perl_save_shared_pvref(pTHX_ char **str)
247{
97aff369 248 dVAR;
7918f24d
NC
249
250 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
251
e22024d3 252 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
253}
254
14f338dc
DM
255/* set the SvFLAGS specified by mask to the values in val */
256
257void
258Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
259{
97aff369 260 dVAR;
7918f24d
NC
261
262 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
263
14f338dc
DM
264 SSCHECK(4);
265 SSPUSHPTR(sv);
266 SSPUSHINT(mask);
267 SSPUSHINT(val);
268 SSPUSHINT(SAVEt_SET_SVFLAGS);
269}
270
79072805 271void
864dbfa3 272Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 273{
97aff369 274 dVAR;
7918f24d
NC
275
276 PERL_ARGS_ASSERT_SAVE_GP;
277
e22024d3 278 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 279
5f05dabc 280 if (empty) {
12816592 281 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 282
fae75791 283 if (GvCVu(gv))
e1a479c5 284 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
285 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
286 gp->gp_io = newIO();
287 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
288 }
72651472
NC
289#ifdef PERL_DONT_CREATE_GVSV
290 if (gv == PL_errgv) {
291 /* We could scatter this logic everywhere by changing the
292 definition of ERRSV from GvSV() to GvSVn(), but it seems more
293 efficient to do this check once here. */
294 gp->gp_sv = newSV(0);
295 }
296#endif
12816592 297 GvGP(gv) = gp;
5f05dabc
PP
298 }
299 else {
44a8e56a 300 gp_ref(GvGP(gv));
5f05dabc
PP
301 GvINTRO_on(gv);
302 }
79072805 303}
79072805 304
79072805 305AV *
864dbfa3 306Perl_save_ary(pTHX_ GV *gv)
79072805 307{
97aff369 308 dVAR;
901017d6 309 AV * const oav = GvAVn(gv);
67a38de0 310 AV *av;
fb73857a 311
7918f24d
NC
312 PERL_ARGS_ASSERT_SAVE_ARY;
313
67a38de0
NIS
314 if (!AvREAL(oav) && AvREIFY(oav))
315 av_reify(oav);
e22024d3 316 save_pushptrptr(gv, oav, SAVEt_AV);
79072805 317
4608196e 318 GvAV(gv) = NULL;
fb73857a 319 av = GvAVn(gv);
0cbee0a4 320 if (SvMAGIC(oav))
9711599e 321 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 322 return av;
79072805
LW
323}
324
325HV *
864dbfa3 326Perl_save_hash(pTHX_ GV *gv)
79072805 327{
97aff369 328 dVAR;
fb73857a
PP
329 HV *ohv, *hv;
330
7918f24d
NC
331 PERL_ARGS_ASSERT_SAVE_HASH;
332
e22024d3 333 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
79072805 334
4608196e 335 GvHV(gv) = NULL;
fb73857a 336 hv = GvHVn(gv);
0cbee0a4 337 if (SvMAGIC(ohv))
9711599e 338 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 339 return hv;
79072805
LW
340}
341
342void
864dbfa3 343Perl_save_item(pTHX_ register SV *item)
79072805 344{
97aff369 345 dVAR;
901017d6 346 register SV * const sv = newSVsv(item);
79072805 347
7918f24d
NC
348 PERL_ARGS_ASSERT_SAVE_ITEM;
349
e22024d3
NC
350 save_pushptrptr(item, /* remember the pointer */
351 sv, /* remember the value */
352 SAVEt_ITEM);
79072805
LW
353}
354
355void
1409bc06 356Perl_save_bool(pTHX_ bool *boolp)
79072805 357{
97aff369 358 dVAR;
7918f24d 359
1409bc06 360 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 361
79072805 362 SSCHECK(3);
1409bc06
NC
363 SSPUSHBOOL(*boolp);
364 SSPUSHPTR(boolp);
365 SSPUSHINT(SAVEt_BOOL);
366}
367
7623d426
NC
368void
369Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
370{
371 dVAR;
372 SSCHECK(3);
373 SSPUSHINT(i);
374 SSPUSHPTR(ptr);
375 SSPUSHINT(type);
79072805
LW
376}
377
378void
1409bc06 379Perl_save_int(pTHX_ int *intp)
9febdf04 380{
97aff369 381 dVAR;
7918f24d 382
1409bc06 383 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 384
1409bc06 385 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
386}
387
388void
58188858
RGS
389Perl_save_I8(pTHX_ I8 *bytep)
390{
391 dVAR;
7918f24d
NC
392
393 PERL_ARGS_ASSERT_SAVE_I8;
394
1409bc06 395 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
58188858
RGS
396}
397
398void
87a84751
JH
399Perl_save_I16(pTHX_ I16 *intp)
400{
401 dVAR;
7918f24d
NC
402
403 PERL_ARGS_ASSERT_SAVE_I16;
404
1409bc06 405 save_pushi32ptr(*intp, intp, SAVEt_I16);
87a84751
JH
406}
407
408void
864dbfa3 409Perl_save_I32(pTHX_ I32 *intp)
79072805 410{
97aff369 411 dVAR;
7918f24d
NC
412
413 PERL_ARGS_ASSERT_SAVE_I32;
414
1409bc06 415 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
416}
417
85e6fe83
LW
418/* Cannot use save_sptr() to store a char* since the SV** cast will
419 * force word-alignment and we'll miss the pointer.
420 */
421void
864dbfa3 422Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 423{
97aff369 424 dVAR;
7918f24d
NC
425
426 PERL_ARGS_ASSERT_SAVE_PPTR;
427
e22024d3 428 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
429}
430
79072805 431void
146174a9
CB
432Perl_save_vptr(pTHX_ void *ptr)
433{
97aff369 434 dVAR;
7918f24d
NC
435
436 PERL_ARGS_ASSERT_SAVE_VPTR;
437
e22024d3 438 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
439}
440
441void
864dbfa3 442Perl_save_sptr(pTHX_ SV **sptr)
79072805 443{
97aff369 444 dVAR;
7918f24d
NC
445
446 PERL_ARGS_ASSERT_SAVE_SPTR;
447
e22024d3 448 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
449}
450
c3564e5c 451void
09edbca0 452Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 453{
97aff369 454 dVAR;
c3564e5c 455 SSCHECK(4);
f3548bdc 456 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 457 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 458 SSPUSHPTR(PL_comppad);
c3564e5c 459 SSPUSHLONG((long)off);
09edbca0 460 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
461}
462
79072805 463void
864dbfa3 464Perl_save_hptr(pTHX_ HV **hptr)
79072805 465{
97aff369 466 dVAR;
7918f24d
NC
467
468 PERL_ARGS_ASSERT_SAVE_HPTR;
469
e22024d3 470 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
471}
472
473void
864dbfa3 474Perl_save_aptr(pTHX_ AV **aptr)
79072805 475{
97aff369 476 dVAR;
7918f24d
NC
477
478 PERL_ARGS_ASSERT_SAVE_APTR;
479
e22024d3 480 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
481}
482
483void
2fd8beea 484Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 485{
97aff369 486 dVAR;
8990e307 487 SSCHECK(2);
2fd8beea
NC
488 SSPUSHPTR(ptr);
489 SSPUSHINT(type);
8990e307
LW
490}
491
492void
864dbfa3 493Perl_save_clearsv(pTHX_ SV **svp)
8990e307 494{
97aff369 495 dVAR;
7918f24d
NC
496
497 PERL_ARGS_ASSERT_SAVE_CLEARSV;
498
f3548bdc 499 ASSERT_CURPAD_ACTIVE("save_clearsv");
8990e307 500 SSCHECK(2);
3280af22 501 SSPUSHLONG((long)(svp-PL_curpad));
8990e307 502 SSPUSHINT(SAVEt_CLEARSV);
d9d18af6 503 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
504}
505
506void
864dbfa3 507Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 508{
97aff369 509 dVAR;
7918f24d
NC
510
511 PERL_ARGS_ASSERT_SAVE_DELETE;
512
85a721ca 513 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
514}
515
516void
c68ec7a9
VP
517Perl_save_adelete(pTHX_ AV *av, I32 key)
518{
519 dVAR;
520
521 PERL_ARGS_ASSERT_SAVE_ADELETE;
522
523 SvREFCNT_inc_void(av);
524 save_pushi32ptr(key, av, SAVEt_ADELETE);
525}
526
527void
12ab1f58
JH
528Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
529{
530 dVAR;
7918f24d
NC
531
532 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
533
12ab1f58
JH
534 SSCHECK(3);
535 SSPUSHDPTR(f);
536 SSPUSHPTR(p);
537 SSPUSHINT(SAVEt_DESTRUCTOR);
538}
539
540void
146174a9
CB
541Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
542{
97aff369 543 dVAR;
146174a9
CB
544 SSCHECK(3);
545 SSPUSHDXPTR(f);
546 SSPUSHPTR(p);
547 SSPUSHINT(SAVEt_DESTRUCTOR_X);
548}
549
550void
da8315f8
NC
551Perl_save_hints(pTHX)
552{
553 dVAR;
554 if (PL_compiling.cop_hints_hash) {
555 HINTS_REFCNT_LOCK;
556 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
557 HINTS_REFCNT_UNLOCK;
558 }
da8315f8 559 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
560 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
561 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 562 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
563 } else {
564 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 565 }
be84297e
NC
566}
567
568static void
569S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
570 const int type)
571{
572 SSCHECK(4);
573 SSPUSHPTR(ptr1);
574 SSPUSHINT(i);
575 SSPUSHPTR(ptr2);
576 SSPUSHINT(type);
da8315f8
NC
577}
578
579void
91d1c79f 580Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 581{
97aff369 582 dVAR;
bfc4de9f 583 SV *sv;
7918f24d 584
91d1c79f 585 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 586
0cbee0a4 587 SvGETMAGIC(*sptr);
be84297e
NC
588 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
589 SAVEt_AELEM);
5dd42e15
DM
590 /* if it gets reified later, the restore will have the wrong refcnt */
591 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 592 SvREFCNT_inc_void(*sptr);
91d1c79f 593 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
594 if (flags & SAVEf_KEEPOLDELEM)
595 return;
bfc4de9f
DM
596 sv = *sptr;
597 /* If we're localizing a tied array element, this new sv
598 * won't actually be stored in the array - so it won't get
599 * reaped when the localize ends. Ensure it gets reaped by
600 * mortifying it instead. DAPM */
601 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
602 sv_2mortal(sv);
4e4c362e
GS
603}
604
605void
af7df257 606Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 607{
97aff369 608 dVAR;
bfc4de9f 609 SV *sv;
7918f24d 610
af7df257 611 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 612
0cbee0a4 613 SvGETMAGIC(*sptr);
4e4c362e 614 SSCHECK(4);
b37c2d43 615 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 616 SSPUSHPTR(newSVsv(key));
4e4c362e
GS
617 SSPUSHPTR(SvREFCNT_inc(*sptr));
618 SSPUSHINT(SAVEt_HELEM);
af7df257 619 save_scalar_at(sptr, flags);
75d34a09
VP
620 if (flags & SAVEf_KEEPOLDELEM)
621 return;
bfc4de9f
DM
622 sv = *sptr;
623 /* If we're localizing a tied hash element, this new sv
624 * won't actually be stored in the hash - so it won't get
625 * reaped when the localize ends. Ensure it gets reaped by
626 * mortifying it instead. DAPM */
627 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
628 sv_2mortal(sv);
4e4c362e
GS
629}
630
2053acbf
NC
631SV*
632Perl_save_svref(pTHX_ SV **sptr)
633{
634 dVAR;
7918f24d
NC
635
636 PERL_ARGS_ASSERT_SAVE_SVREF;
637
2053acbf 638 SvGETMAGIC(*sptr);
e22024d3 639 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 640 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
641}
642
455ece5e 643I32
864dbfa3 644Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 645{
97aff369 646 dVAR;
35a4481c 647 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 648 - (char*)PL_savestack);
35a4481c 649 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
455ece5e 650
1bb4c835 651 SSGROW(elems + 2);
455ece5e
AD
652
653 PL_savestack_ix += elems;
654 SSPUSHINT(elems);
655 SSPUSHINT(SAVEt_ALLOC);
656 return start;
657}
658
462e5cf6 659void
864dbfa3 660Perl_leave_scope(pTHX_ I32 base)
79072805 661{
97aff369 662 dVAR;
79072805
LW
663 register SV *sv;
664 register SV *value;
665 register GV *gv;
666 register AV *av;
667 register HV *hv;
20454177 668 void* ptr;
f4dd75d9 669 register char* str;
161b7d16 670 I32 i;
302c0c93
NC
671 /* Localise the effects of the TAINT_NOT inside the loop. */
672 const bool was = PL_tainted;
79072805
LW
673
674 if (base < -1)
cea2e8a9 675 Perl_croak(aTHX_ "panic: corrupt saved stack index");
3280af22 676 while (PL_savestack_ix > base) {
c6ae7647
NC
677 TAINT_NOT;
678
79072805
LW
679 switch (SSPOPINT) {
680 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
681 value = MUTABLE_SV(SSPOPPTR);
682 sv = MUTABLE_SV(SSPOPPTR);
79072805 683 sv_replace(sv,value);
3280af22 684 PL_localizing = 2;
79072805 685 SvSETMAGIC(sv);
3280af22 686 PL_localizing = 0;
79072805 687 break;
8aacddc1 688 case SAVEt_SV: /* scalar reference */
ad64d0ec 689 value = MUTABLE_SV(SSPOPPTR);
159b6efe 690 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 691 ptr = &GvSV(gv);
502c6561 692 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
693 restore_sv:
694 sv = *(SV**)ptr;
2053acbf
NC
695 *(SV**)ptr = value;
696 SvREFCNT_dec(sv);
697 PL_localizing = 2;
698 SvSETMAGIC(value);
699 PL_localizing = 0;
700 SvREFCNT_dec(value);
701 if (av) /* actually an av, hv or gv */
702 SvREFCNT_dec(av);
703 break;
8aacddc1 704 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 705 ptr = SSPOPPTR;
b03d03b0 706 str = (char*)SSPOPPTR;
f4dd75d9
GS
707 if (*(char**)ptr != str) {
708 Safefree(*(char**)ptr);
709 *(char**)ptr = str;
710 }
711 break;
05ec9bb3
NIS
712 case SAVEt_SHARED_PVREF: /* shared pv */
713 str = (char*)SSPOPPTR;
714 ptr = SSPOPPTR;
715 if (*(char**)ptr != str) {
5e54c26f 716#ifdef NETWARE
9ecbcc42 717 PerlMem_free(*(char**)ptr);
5e54c26f 718#else
05ec9bb3 719 PerlMemShared_free(*(char**)ptr);
5e54c26f 720#endif
05ec9bb3
NIS
721 *(char**)ptr = str;
722 }
723 break;
8aacddc1 724 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 725 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 726 ptr = SSPOPPTR;
f4dd75d9
GS
727 sv = *(SV**)ptr;
728 *(SV**)ptr = value;
729 SvREFCNT_dec(sv);
b9d12d37
GS
730 SvREFCNT_dec(value);
731 break;
8aacddc1 732 case SAVEt_AV: /* array reference */
502c6561 733 av = MUTABLE_AV(SSPOPPTR);
159b6efe 734 gv = MUTABLE_GV(SSPOPPTR);
fb73857a 735 if (GvAV(gv)) {
c4a7531d 736 SvREFCNT_dec(GvAV(gv));
fb73857a 737 }
8aacddc1 738 GvAV(gv) = av;
fb73857a 739 if (SvMAGICAL(av)) {
3280af22 740 PL_localizing = 2;
ad64d0ec 741 SvSETMAGIC(MUTABLE_SV(av));
3280af22 742 PL_localizing = 0;
fb73857a 743 }
8aacddc1
NIS
744 break;
745 case SAVEt_HV: /* hash reference */
85fbaab2 746 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 747 gv = MUTABLE_GV(SSPOPPTR);
fb73857a 748 if (GvHV(gv)) {
c4a7531d 749 SvREFCNT_dec(GvHV(gv));
fb73857a 750 }
8aacddc1 751 GvHV(gv) = hv;
fb73857a 752 if (SvMAGICAL(hv)) {
3280af22 753 PL_localizing = 2;
ad64d0ec 754 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 755 PL_localizing = 0;
fb73857a 756 }
8aacddc1 757 break;
79072805
LW
758 case SAVEt_INT: /* int reference */
759 ptr = SSPOPPTR;
760 *(int*)ptr = (int)SSPOPINT;
761 break;
9febdf04
RH
762 case SAVEt_BOOL: /* bool reference */
763 ptr = SSPOPPTR;
764 *(bool*)ptr = (bool)SSPOPBOOL;
765 break;
79072805
LW
766 case SAVEt_I32: /* I32 reference */
767 ptr = SSPOPPTR;
3235b7a3
NC
768#ifdef PERL_DEBUG_READONLY_OPS
769 {
770 const I32 val = SSPOPINT;
771 if (*(I32*)ptr != val)
772 *(I32*)ptr = val;
773 }
774#else
79072805 775 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 776#endif
79072805
LW
777 break;
778 case SAVEt_SPTR: /* SV* reference */
779 ptr = SSPOPPTR;
ad64d0ec 780 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 781 break;
146174a9 782 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
783 case SAVEt_PPTR: /* char* reference */
784 ptr = SSPOPPTR;
785 *(char**)ptr = (char*)SSPOPPTR;
786 break;
79072805
LW
787 case SAVEt_HPTR: /* HV* reference */
788 ptr = SSPOPPTR;
85fbaab2 789 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
790 break;
791 case SAVEt_APTR: /* AV* reference */
792 ptr = SSPOPPTR;
502c6561 793 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 794 break;
fb73857a 795 case SAVEt_GP: /* scalar reference */
79072805 796 ptr = SSPOPPTR;
159b6efe 797 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1
NIS
798 gp_free(gv);
799 GvGP(gv) = (GP*)ptr;
dd69841b
BB
800 /* putting a method back into circulation ("local")*/
801 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
802 mro_method_changed_in(hv);
4633a7c4 803 SvREFCNT_dec(gv);
8aacddc1 804 break;
8990e307
LW
805 case SAVEt_FREESV:
806 ptr = SSPOPPTR;
ad64d0ec 807 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 808 break;
26d9b02f
JH
809 case SAVEt_MORTALIZESV:
810 ptr = SSPOPPTR;
ad64d0ec 811 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 812 break;
8990e307
LW
813 case SAVEt_FREEOP:
814 ptr = SSPOPPTR;
f3548bdc 815 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
816 op_free((OP*)ptr);
817 break;
818 case SAVEt_FREEPV:
819 ptr = SSPOPPTR;
1df70142 820 Safefree(ptr);
8990e307
LW
821 break;
822 case SAVEt_CLEARSV:
3280af22 823 ptr = (void*)&PL_curpad[SSPOPLONG];
8990e307 824 sv = *(SV**)ptr;
dd2155a4
DM
825
826 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
827 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
828 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
829 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
830 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
831 ));
832
bc44cdaf
GS
833 /* Can clear pad variable in place? */
834 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
835 /*
836 * if a my variable that was made readonly is going out of
837 * scope, we want to remove the readonlyness so that it can
838 * go out of scope quietly
8aacddc1 839 */
a26e96df 840 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
841 SvREADONLY_off(sv);
842
6fc92669 843 if (SvTHINKFIRST(sv))
840a7b70 844 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
845 if (SvMAGICAL(sv))
846 mg_free(sv);
8990e307
LW
847
848 switch (SvTYPE(sv)) {
849 case SVt_NULL:
850 break;
851 case SVt_PVAV:
502c6561 852 av_clear(MUTABLE_AV(sv));
8990e307
LW
853 break;
854 case SVt_PVHV:
85fbaab2 855 hv_clear(MUTABLE_HV(sv));
8990e307
LW
856 break;
857 case SVt_PVCV:
cea2e8a9 858 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 859 default:
0c34ef67 860 SvOK_off(sv);
8990e307
LW
861 break;
862 }
d9d18af6 863 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
864 }
865 else { /* Someone has a claim on this, so abandon it. */
35a4481c 866 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 867 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
868 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
869 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 870 default: *(SV**)ptr = newSV(0); break;
8990e307 871 }
53868620 872 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
873 /* preserve pad nature, but also mark as not live
874 * for any closure capturing */
2740392c 875 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
876 }
877 break;
878 case SAVEt_DELETE:
879 ptr = SSPOPPTR;
85fbaab2 880 hv = MUTABLE_HV(ptr);
35d4f826 881 i = SSPOPINT;
8990e307 882 ptr = SSPOPPTR;
35d4f826 883 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 884 SvREFCNT_dec(hv);
8aacddc1 885 Safefree(ptr);
8990e307 886 break;
c68ec7a9
VP
887 case SAVEt_ADELETE:
888 ptr = SSPOPPTR;
889 av = MUTABLE_AV(ptr);
890 i = SSPOPINT;
891 (void)av_delete(av, i, G_DISCARD);
892 SvREFCNT_dec(av);
893 break;
146174a9
CB
894 case SAVEt_DESTRUCTOR_X:
895 ptr = SSPOPPTR;
acfe0abc 896 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
897 break;
898 case SAVEt_REGCONTEXT:
455ece5e 899 case SAVEt_ALLOC:
161b7d16 900 i = SSPOPINT;
3280af22 901 PL_savestack_ix -= i; /* regexp must have croaked */
a0d0e21e 902 break;
55497cff 903 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 904 i = SSPOPINT;
3280af22 905 PL_stack_sp = PL_stack_base + i;
55497cff 906 break;
ea8d6ae1
DB
907 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
908 i = SSPOPINT;
909 cxstack[i].blk_oldsp = SSPOPINT;
910 break;
161b7d16 911 case SAVEt_AELEM: /* array element */
ad64d0ec 912 value = MUTABLE_SV(SSPOPPTR);
161b7d16 913 i = SSPOPINT;
502c6561 914 av = MUTABLE_AV(SSPOPPTR);
658aef79 915 ptr = av_fetch(av,i,1);
5dd42e15
DM
916 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
917 SvREFCNT_dec(value);
4e4c362e
GS
918 if (ptr) {
919 sv = *(SV**)ptr;
3280af22 920 if (sv && sv != &PL_sv_undef) {
ad64d0ec 921 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 922 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
923 goto restore_sv;
924 }
925 }
926 SvREFCNT_dec(av);
927 SvREFCNT_dec(value);
928 break;
161b7d16 929 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
930 value = MUTABLE_SV(SSPOPPTR);
931 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 932 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 933 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 934 SvREFCNT_dec(sv);
4e4c362e 935 if (ptr) {
35a4481c 936 const SV * const oval = HeVAL((HE*)ptr);
3280af22 937 if (oval && oval != &PL_sv_undef) {
4e4c362e 938 ptr = &HeVAL((HE*)ptr);
ad64d0ec 939 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 940 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 941 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
942 goto restore_sv;
943 }
944 }
945 SvREFCNT_dec(hv);
4e4c362e
GS
946 SvREFCNT_dec(value);
947 break;
462e5cf6 948 case SAVEt_OP:
533c011a 949 PL_op = (OP*)SSPOPPTR;
462e5cf6 950 break;
25eaa213 951 case SAVEt_HINTS:
045ac317 952 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 953 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
954 GvHV(PL_hintgv) = NULL;
955 }
c28fe1ec
NC
956 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
957 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 958 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 959 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 960 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 961 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
962 assert(GvHV(PL_hintgv));
963 } else if (!GvHV(PL_hintgv)) {
964 /* Need to add a new one manually, else gv_fetchpv() can
965 add one in this code:
966
967 if (SvTYPE(gv) == SVt_PVGV) {
968 if (add) {
969 GvMULTI_on(gv);
970 gv_init_sv(gv, sv_type);
971 if (*name=='!' && sv_type == SVt_PVHV && len==1)
972 require_errno(gv);
973 }
974 return gv;
975 }
976
977 and it won't have the magic set. */
978
979 HV *const hv = newHV();
980 hv_magic(hv, NULL, PERL_MAGIC_hints);
981 GvHV(PL_hintgv) = hv;
dfa41748 982 }
5b9c0671 983 assert(GvHV(PL_hintgv));
b3ac6de7 984 break;
cb50131a 985 case SAVEt_COMPPAD:
f3548bdc 986 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 987 if (PL_comppad)
cb50131a
CB
988 PL_curpad = AvARRAY(PL_comppad);
989 else
4608196e 990 PL_curpad = NULL;
cb50131a 991 break;
09edbca0 992 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 993 {
35a4481c 994 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 995 SV **svp;
c3564e5c 996 ptr = SSPOPPTR;
09edbca0
NC
997 assert (ptr);
998 svp = AvARRAY((PAD*)ptr) + off;
999 /* This mortalizing used to be done by POPLOOP() via itersave.
1000 But as we have all the information here, we can do it here,
1001 save even having to have itersave in the struct. */
1002 sv_2mortal(*svp);
ad64d0ec 1003 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1004 }
1005 break;
8b7059b1
DM
1006 case SAVEt_SAVESWITCHSTACK:
1007 {
1008 dSP;
502c6561
NC
1009 AV *const t = MUTABLE_AV(SSPOPPTR);
1010 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1011 SWITCHSTACK(t,f);
1012 PL_curstackinfo->si_stack = f;
1013 }
1014 break;
14f338dc
DM
1015 case SAVEt_SET_SVFLAGS:
1016 {
35a4481c
AL
1017 const U32 val = (U32)SSPOPINT;
1018 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1019 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1020 SvFLAGS(sv) &= ~mask;
1021 SvFLAGS(sv) |= val;
1022 }
1023 break;
95e06916
NC
1024
1025 /* This would be a mathom, but Perl_save_svref() calls a static
1026 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1027 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1028 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1029 ptr = SSPOPPTR;
1030 av = NULL; /* what to refcnt_dec */
1031 goto restore_sv;
95e06916
NC
1032
1033 /* These are only saved in mathoms.c */
1034 case SAVEt_NSTAB:
159b6efe 1035 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1036 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1037 break;
2053acbf
NC
1038 case SAVEt_LONG: /* long reference */
1039 ptr = SSPOPPTR;
1040 *(long*)ptr = (long)SSPOPLONG;
1041 break;
95e06916
NC
1042 case SAVEt_IV: /* IV reference */
1043 ptr = SSPOPPTR;
1044 *(IV*)ptr = (IV)SSPOPIV;
1045 break;
1046
2053acbf
NC
1047 case SAVEt_I16: /* I16 reference */
1048 ptr = SSPOPPTR;
1049 *(I16*)ptr = (I16)SSPOPINT;
1050 break;
1051 case SAVEt_I8: /* I8 reference */
1052 ptr = SSPOPPTR;
1053 *(I8*)ptr = (I8)SSPOPINT;
1054 break;
2053acbf
NC
1055 case SAVEt_DESTRUCTOR:
1056 ptr = SSPOPPTR;
1057 (*SSPOPDPTR)(ptr);
1058 break;
fc15ae8f
NC
1059 case SAVEt_COP_ARYBASE:
1060 ptr = SSPOPPTR;
1061 i = SSPOPINT;
1062 CopARYBASE_set((COP *)ptr, i);
1063 break;
68da3b2f
NC
1064 case SAVEt_COMPILE_WARNINGS:
1065 ptr = SSPOPPTR;
72dc9ed5 1066
68da3b2f
NC
1067 if (!specialWARN(PL_compiling.cop_warnings))
1068 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1069
10edeb5d 1070 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1071 break;
1ade1aa1
NC
1072 case SAVEt_RE_STATE:
1073 {
1074 const struct re_save_state *const state
1075 = (struct re_save_state *)
1076 (PL_savestack + PL_savestack_ix
1077 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1078 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1079
1ade1aa1
NC
1080 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1081 Safefree(PL_reg_start_tmp);
1ade1aa1 1082 }
1ade1aa1
NC
1083 if (PL_reg_poscache != state->re_state_reg_poscache) {
1084 Safefree(PL_reg_poscache);
1ade1aa1 1085 }
46ab3289 1086 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1087 }
1088 break;
7c197c94
DM
1089 case SAVEt_PARSER:
1090 ptr = SSPOPPTR;
1091 parser_free((yy_parser *) ptr);
1092 break;
79072805 1093 default:
cea2e8a9 1094 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1095 }
1096 }
302c0c93
NC
1097
1098 PL_tainted = was;
79072805 1099}
8990e307 1100
8990e307 1101void
864dbfa3 1102Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1103{
97aff369 1104 dVAR;
7918f24d
NC
1105
1106 PERL_ARGS_ASSERT_CX_DUMP;
1107
35ff7856 1108#ifdef DEBUGGING
22c35a8c 1109 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1110 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1111 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1112 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1113 PTR2UV(cx->blk_oldcop));
760ac839
LW
1114 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1115 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1116 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1117 PTR2UV(cx->blk_oldpm));
760ac839 1118 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1119 }
6b35e009 1120 switch (CxTYPE(cx)) {
8990e307
LW
1121 case CXt_NULL:
1122 case CXt_BLOCK:
1123 break;
146174a9 1124 case CXt_FORMAT:
f9c764c5
NC
1125 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1126 PTR2UV(cx->blk_format.cv));
1127 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1128 PTR2UV(cx->blk_format.gv));
1129 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1130 PTR2UV(cx->blk_format.dfoutgv));
1131 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1132 (int)CxHASARGS(cx));
f9c764c5
NC
1133 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1134 PTR2UV(cx->blk_format.retop));
146174a9 1135 break;
8990e307 1136 case CXt_SUB:
146174a9
CB
1137 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1138 PTR2UV(cx->blk_sub.cv));
760ac839 1139 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1140 (long)cx->blk_sub.olddepth);
760ac839 1141 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1142 (int)CxHASARGS(cx));
1143 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1144 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1145 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1146 break;
1147 case CXt_EVAL:
760ac839 1148 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1149 (long)CxOLD_IN_EVAL(cx));
760ac839 1150 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1151 PL_op_name[CxOLD_OP_TYPE(cx)],
1152 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1153 if (cx->blk_eval.old_namesv)
1154 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1155 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1156 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1157 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1158 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1159 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1160 break;
1161
c6fdafd0 1162 case CXt_LOOP_LAZYIV:
d01136d6 1163 case CXt_LOOP_LAZYSV:
3b719c58
NC
1164 case CXt_LOOP_FOR:
1165 case CXt_LOOP_PLAIN:
0cbdab38 1166 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1167 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1168 (long)cx->blk_loop.resetsp);
022eaa24
NC
1169 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1170 PTR2UV(cx->blk_loop.my_op));
146174a9 1171 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
022eaa24 1172 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
d01136d6 1173 /* XXX: not accurate for LAZYSV/IV */
146174a9 1174 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1175 PTR2UV(cx->blk_loop.state_u.ary.ary));
1176 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1177 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1178 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1179 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1180 break;
1181
1182 case CXt_SUBST:
760ac839 1183 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1184 (long)cx->sb_iters);
760ac839 1185 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1186 (long)cx->sb_maxiters);
35ef4773
GS
1187 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1188 (long)cx->sb_rflags);
760ac839 1189 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1190 (long)CxONCE(cx));
760ac839 1191 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1192 cx->sb_orig);
146174a9
CB
1193 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1194 PTR2UV(cx->sb_dstr));
1195 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1196 PTR2UV(cx->sb_targ));
1197 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1198 PTR2UV(cx->sb_s));
1199 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1200 PTR2UV(cx->sb_m));
1201 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1202 PTR2UV(cx->sb_strend));
1203 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1204 PTR2UV(cx->sb_rxres));
8990e307
LW
1205 break;
1206 }
65e66c80 1207#else
96a5add6 1208 PERL_UNUSED_CONTEXT;
65e66c80 1209 PERL_UNUSED_ARG(cx);
17c3b450 1210#endif /* DEBUGGING */
35ff7856 1211}
241d1a3b
NC
1212
1213/*
1214 * Local variables:
1215 * c-indentation-style: bsd
1216 * c-basic-offset: 4
1217 * indent-tabs-mode: t
1218 * End:
1219 *
37442d52
RGS
1220 * ex: set ts=8 sts=4 sw=4 noet:
1221 */