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save_int/i32 inline the long version
[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);
401a9b14 80 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT);
9965345d
JH
81 /* Without any kind of initialising deep enough recursion
82 * will end up reading uninitialised PERL_CONTEXTs. */
109bf713 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);
d343c3ef
GG
94#ifdef DEBUGGING
95 Renew(PL_scopestack_name, PL_scopestack_max, const char*);
520bb150 96#endif
79072805 97 }
d343c3ef
GG
98#ifdef DEBUGGING
99 PL_scopestack_name[PL_scopestack_ix] = "unknown";
100#endif
3280af22 101 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
79072805
LW
102
103}
104
105void
864dbfa3 106Perl_pop_scope(pTHX)
79072805 107{
97aff369 108 dVAR;
35a4481c 109 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
8990e307 110 LEAVE_SCOPE(oldsave);
79072805
LW
111}
112
113void
864dbfa3 114Perl_markstack_grow(pTHX)
a0d0e21e 115{
97aff369 116 dVAR;
35a4481c
AL
117 const I32 oldmax = PL_markstack_max - PL_markstack;
118 const I32 newmax = GROW(oldmax);
a0d0e21e 119
3280af22
NIS
120 Renew(PL_markstack, newmax, I32);
121 PL_markstack_ptr = PL_markstack + oldmax;
122 PL_markstack_max = PL_markstack + newmax;
a0d0e21e
LW
123}
124
125void
864dbfa3 126Perl_savestack_grow(pTHX)
79072805 127{
97aff369 128 dVAR;
8aacddc1 129 PL_savestack_max = GROW(PL_savestack_max) + 4;
3280af22 130 Renew(PL_savestack, PL_savestack_max, ANY);
79072805
LW
131}
132
4b3c1a47
AE
133void
134Perl_savestack_grow_cnt(pTHX_ I32 need)
135{
97aff369 136 dVAR;
4b3c1a47
AE
137 PL_savestack_max = PL_savestack_ix + need;
138 Renew(PL_savestack, PL_savestack_max, ANY);
139}
140
2ce36478
SM
141#undef GROW
142
79072805 143void
864dbfa3 144Perl_tmps_grow(pTHX_ I32 n)
677b06e3 145{
97aff369 146 dVAR;
677b06e3
GS
147#ifndef STRESS_REALLOC
148 if (n < 128)
149 n = (PL_tmps_max < 512) ? 128 : 512;
150#endif
151 PL_tmps_max = PL_tmps_ix + n + 1;
152 Renew(PL_tmps_stack, PL_tmps_max, SV*);
153}
154
155
156void
864dbfa3 157Perl_free_tmps(pTHX)
79072805 158{
97aff369 159 dVAR;
79072805 160 /* XXX should tmps_floor live in cxstack? */
35a4481c 161 const I32 myfloor = PL_tmps_floor;
3280af22 162 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
22ade07d 163 SV* const sv = PL_tmps_stack[PL_tmps_ix--];
72581b5b
VP
164#ifdef PERL_POISON
165 PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB);
22ade07d 166#endif
8aacddc1 167 if (sv && sv != &PL_sv_undef) {
463ee0b2 168 SvTEMP_off(sv);
8990e307 169 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 170 }
79072805
LW
171 }
172}
173
76e3520e 174STATIC SV *
af7df257 175S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 176{
97aff369 177 dVAR;
75d34a09 178 SV * osv;
eb578fdb 179 SV *sv;
79072805 180
7918f24d
NC
181 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
182
75d34a09
VP
183 osv = *sptr;
184 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
185
f1f99dc1 186 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv)) {
a0d0e21e 187 if (SvGMAGICAL(osv)) {
a0d0e21e 188 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 189 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
a0d0e21e 190 }
75d34a09 191 if (!(flags & SAVEf_KEEPOLDELEM))
2dcac756 192 mg_localize(osv, sv, cBOOL(flags & SAVEf_SETMAGIC));
79072805 193 }
75d34a09 194
79072805
LW
195 return sv;
196}
197
dfcd3de5
NC
198void
199Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
200{
201 dVAR;
a3444cc5
DM
202 dSS_ADD;
203 SS_ADD_PTR(ptr1);
204 SS_ADD_PTR(ptr2);
205 SS_ADD_UV(type);
206 SS_ADD_END(3);
e22024d3
NC
207}
208
7a4c00b4 209SV *
864dbfa3 210Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 211{
97aff369 212 dVAR;
fb4fc1fa 213 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
214
215 PERL_ARGS_ASSERT_SAVE_SCALAR;
216
27cc343c 217 PL_localizing = 1;
0cbee0a4 218 SvGETMAGIC(*sptr);
27cc343c 219 PL_localizing = 0;
e22024d3 220 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 221 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
222}
223
f4dd75d9 224/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
225 * restore a global SV to its prior contents, freeing new value. */
226void
864dbfa3 227Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 228{
97aff369 229 dVAR;
7918f24d
NC
230
231 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
232
e22024d3 233 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
234}
235
f4dd75d9
GS
236/* Like save_pptr(), but also Safefree()s the new value if it is different
237 * from the old one. Can be used to restore a global char* to its prior
238 * contents, freeing new value. */
239void
240Perl_save_generic_pvref(pTHX_ char **str)
241{
97aff369 242 dVAR;
7918f24d
NC
243
244 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
245
e22024d3 246 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
247}
248
05ec9bb3
NIS
249/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
250 * Can be used to restore a shared global char* to its prior
251 * contents, freeing new value. */
252void
253Perl_save_shared_pvref(pTHX_ char **str)
254{
97aff369 255 dVAR;
7918f24d
NC
256
257 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
258
e22024d3 259 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
260}
261
14f338dc
DM
262/* set the SvFLAGS specified by mask to the values in val */
263
264void
265Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
266{
97aff369 267 dVAR;
a3444cc5 268 dSS_ADD;
7918f24d
NC
269
270 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
271
a3444cc5
DM
272 SS_ADD_PTR(sv);
273 SS_ADD_INT(mask);
274 SS_ADD_INT(val);
275 SS_ADD_UV(SAVEt_SET_SVFLAGS);
276 SS_ADD_END(4);
14f338dc
DM
277}
278
79072805 279void
864dbfa3 280Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 281{
97aff369 282 dVAR;
7918f24d
NC
283
284 PERL_ARGS_ASSERT_SAVE_GP;
285
10507e11 286 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 287
5f05dabc 288 if (empty) {
12816592 289 GP *gp = Perl_newGP(aTHX_ gv);
959f7ad7 290 HV * const stash = GvSTASH(gv);
3d460042
FC
291 bool isa_changed = 0;
292
293 if (stash && HvENAME(stash)) {
294 if (GvNAMELEN(gv) == 3 && strnEQ(GvNAME(gv), "ISA", 3))
295 isa_changed = TRUE;
296 else if (GvCVu(gv))
297 /* taking a method out of circulation ("local")*/
298 mro_method_changed_in(stash);
299 }
146174a9
CB
300 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
301 gp->gp_io = newIO();
302 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
303 }
c43ae56f 304 GvGP_set(gv,gp);
3d460042 305 if (isa_changed) mro_isa_changed_in(stash);
5f05dabc
PP
306 }
307 else {
44a8e56a 308 gp_ref(GvGP(gv));
5f05dabc
PP
309 GvINTRO_on(gv);
310 }
79072805 311}
79072805 312
79072805 313AV *
864dbfa3 314Perl_save_ary(pTHX_ GV *gv)
79072805 315{
97aff369 316 dVAR;
901017d6 317 AV * const oav = GvAVn(gv);
67a38de0 318 AV *av;
fb73857a 319
7918f24d
NC
320 PERL_ARGS_ASSERT_SAVE_ARY;
321
67a38de0
NIS
322 if (!AvREAL(oav) && AvREIFY(oav))
323 av_reify(oav);
01433346 324 save_pushptrptr(SvREFCNT_inc_simple_NN(gv), oav, SAVEt_AV);
79072805 325
4608196e 326 GvAV(gv) = NULL;
fb73857a 327 av = GvAVn(gv);
0cbee0a4 328 if (SvMAGIC(oav))
9711599e 329 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 330 return av;
79072805
LW
331}
332
333HV *
864dbfa3 334Perl_save_hash(pTHX_ GV *gv)
79072805 335{
97aff369 336 dVAR;
fb73857a
PP
337 HV *ohv, *hv;
338
7918f24d
NC
339 PERL_ARGS_ASSERT_SAVE_HASH;
340
01433346
FC
341 save_pushptrptr(
342 SvREFCNT_inc_simple_NN(gv), (ohv = GvHVn(gv)), SAVEt_HV
343 );
79072805 344
4608196e 345 GvHV(gv) = NULL;
fb73857a 346 hv = GvHVn(gv);
0cbee0a4 347 if (SvMAGIC(ohv))
9711599e 348 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 349 return hv;
79072805
LW
350}
351
352void
5aaab254 353Perl_save_item(pTHX_ SV *item)
79072805 354{
97aff369 355 dVAR;
eb578fdb 356 SV * const sv = newSVsv(item);
79072805 357
7918f24d
NC
358 PERL_ARGS_ASSERT_SAVE_ITEM;
359
e22024d3
NC
360 save_pushptrptr(item, /* remember the pointer */
361 sv, /* remember the value */
362 SAVEt_ITEM);
79072805
LW
363}
364
365void
1409bc06 366Perl_save_bool(pTHX_ bool *boolp)
79072805 367{
97aff369 368 dVAR;
a3444cc5 369 dSS_ADD;
7918f24d 370
1409bc06 371 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 372
a3444cc5
DM
373 SS_ADD_PTR(boolp);
374 SS_ADD_UV(SAVEt_BOOL | (*boolp << 8));
375 SS_ADD_END(2);
1409bc06
NC
376}
377
7623d426
NC
378void
379Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
380{
381 dVAR;
a3444cc5
DM
382 dSS_ADD;
383
384 SS_ADD_INT(i);
385 SS_ADD_PTR(ptr);
386 SS_ADD_UV(type);
387 SS_ADD_END(3);
79072805
LW
388}
389
390void
1409bc06 391Perl_save_int(pTHX_ int *intp)
9febdf04 392{
97aff369 393 dVAR;
d172696c
DM
394 const int i = *intp;
395 UV type = ((UV)(i << SAVE_TIGHT_SHIFT) | SAVEt_INT_SMALL);
396 int size = 2;
397 dSS_ADD;
7918f24d 398
1409bc06 399 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 400
d172696c
DM
401 if ((int)(type >> SAVE_TIGHT_SHIFT) != i) {
402 SS_ADD_INT(i);
403 type = SAVEt_INT;
404 size++;
405 }
406 SS_ADD_PTR(intp);
407 SS_ADD_UV(type);
408 SS_ADD_END(size);
9febdf04
RH
409}
410
411void
58188858
RGS
412Perl_save_I8(pTHX_ I8 *bytep)
413{
414 dVAR;
a3444cc5 415 dSS_ADD;
7918f24d
NC
416
417 PERL_ARGS_ASSERT_SAVE_I8;
418
a3444cc5
DM
419 SS_ADD_PTR(bytep);
420 SS_ADD_UV(SAVEt_I8 | ((UV)*bytep << 8));
421 SS_ADD_END(2);
58188858
RGS
422}
423
424void
87a84751
JH
425Perl_save_I16(pTHX_ I16 *intp)
426{
427 dVAR;
a3444cc5 428 dSS_ADD;
7918f24d
NC
429
430 PERL_ARGS_ASSERT_SAVE_I16;
431
a3444cc5
DM
432 SS_ADD_PTR(intp);
433 SS_ADD_UV(SAVEt_I16 | ((UV)*intp << 8));
434 SS_ADD_END(2);
87a84751
JH
435}
436
437void
864dbfa3 438Perl_save_I32(pTHX_ I32 *intp)
79072805 439{
97aff369 440 dVAR;
d172696c
DM
441 const I32 i = *intp;
442 UV type = ((I32)(i << SAVE_TIGHT_SHIFT) | SAVEt_I32_SMALL);
443 int size = 2;
444 dSS_ADD;
7918f24d
NC
445
446 PERL_ARGS_ASSERT_SAVE_I32;
447
d172696c
DM
448 if ((I32)(type >> SAVE_TIGHT_SHIFT) != i) {
449 SS_ADD_INT(i);
450 type = SAVEt_I32;
451 size++;
452 }
453 SS_ADD_PTR(intp);
454 SS_ADD_UV(type);
455 SS_ADD_END(size);
79072805
LW
456}
457
85e6fe83
LW
458/* Cannot use save_sptr() to store a char* since the SV** cast will
459 * force word-alignment and we'll miss the pointer.
460 */
461void
864dbfa3 462Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 463{
97aff369 464 dVAR;
7918f24d
NC
465
466 PERL_ARGS_ASSERT_SAVE_PPTR;
467
e22024d3 468 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
469}
470
79072805 471void
146174a9
CB
472Perl_save_vptr(pTHX_ void *ptr)
473{
97aff369 474 dVAR;
7918f24d
NC
475
476 PERL_ARGS_ASSERT_SAVE_VPTR;
477
e22024d3 478 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
479}
480
481void
864dbfa3 482Perl_save_sptr(pTHX_ SV **sptr)
79072805 483{
97aff369 484 dVAR;
7918f24d
NC
485
486 PERL_ARGS_ASSERT_SAVE_SPTR;
487
e22024d3 488 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
489}
490
c3564e5c 491void
09edbca0 492Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 493{
97aff369 494 dVAR;
a3444cc5
DM
495 dSS_ADD;
496
f3548bdc 497 ASSERT_CURPAD_ACTIVE("save_padsv");
a3444cc5
DM
498 SS_ADD_PTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
499 SS_ADD_PTR(PL_comppad);
500 SS_ADD_LONG((long)off);
501 SS_ADD_UV(SAVEt_PADSV_AND_MORTALIZE);
502 SS_ADD_END(4);
c3564e5c
GS
503}
504
79072805 505void
864dbfa3 506Perl_save_hptr(pTHX_ HV **hptr)
79072805 507{
97aff369 508 dVAR;
7918f24d
NC
509
510 PERL_ARGS_ASSERT_SAVE_HPTR;
511
e22024d3 512 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
513}
514
515void
864dbfa3 516Perl_save_aptr(pTHX_ AV **aptr)
79072805 517{
97aff369 518 dVAR;
7918f24d
NC
519
520 PERL_ARGS_ASSERT_SAVE_APTR;
521
e22024d3 522 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
523}
524
525void
2fd8beea 526Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 527{
97aff369 528 dVAR;
a3444cc5
DM
529 dSS_ADD;
530 SS_ADD_PTR(ptr);
531 SS_ADD_UV(type);
532 SS_ADD_END(2);
8990e307
LW
533}
534
535void
864dbfa3 536Perl_save_clearsv(pTHX_ SV **svp)
8990e307 537{
97aff369 538 dVAR;
cdcdfc56
NC
539 const UV offset = svp - PL_curpad;
540 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
541
542 PERL_ARGS_ASSERT_SAVE_CLEARSV;
543
f3548bdc 544 ASSERT_CURPAD_ACTIVE("save_clearsv");
623e28c6 545 SvPADSTALE_off(*svp); /* mark lexical as active */
a3444cc5 546 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset) {
cdcdfc56
NC
547 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
548 offset, svp, PL_curpad);
a3444cc5 549 }
cdcdfc56 550
a3444cc5
DM
551 {
552 dSS_ADD;
553 SS_ADD_UV(offset_shifted | SAVEt_CLEARSV);
554 SS_ADD_END(1);
555 }
8990e307
LW
556}
557
558void
864dbfa3 559Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 560{
97aff369 561 dVAR;
7918f24d
NC
562
563 PERL_ARGS_ASSERT_SAVE_DELETE;
564
85a721ca 565 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
566}
567
568void
af097752
VP
569Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
570{
571 STRLEN len;
572 I32 klen;
573 const char *key;
574
575 PERL_ARGS_ASSERT_SAVE_HDELETE;
576
577 key = SvPV_const(keysv, len);
578 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
579 SvREFCNT_inc_simple_void_NN(hv);
580 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
581}
582
583void
c68ec7a9
VP
584Perl_save_adelete(pTHX_ AV *av, I32 key)
585{
586 dVAR;
587
588 PERL_ARGS_ASSERT_SAVE_ADELETE;
589
590 SvREFCNT_inc_void(av);
591 save_pushi32ptr(key, av, SAVEt_ADELETE);
592}
593
594void
12ab1f58
JH
595Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
596{
597 dVAR;
a3444cc5 598 dSS_ADD;
7918f24d
NC
599
600 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
601
a3444cc5
DM
602 SS_ADD_DPTR(f);
603 SS_ADD_PTR(p);
604 SS_ADD_UV(SAVEt_DESTRUCTOR);
605 SS_ADD_END(3);
12ab1f58
JH
606}
607
608void
146174a9
CB
609Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
610{
97aff369 611 dVAR;
a3444cc5
DM
612 dSS_ADD;
613
614 SS_ADD_DXPTR(f);
615 SS_ADD_PTR(p);
616 SS_ADD_UV(SAVEt_DESTRUCTOR_X);
617 SS_ADD_END(3);
146174a9
CB
618}
619
620void
da8315f8
NC
621Perl_save_hints(pTHX)
622{
623 dVAR;
20439bc7 624 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 625 if (PL_hints & HINT_LOCALIZE_HH) {
52c7aca6
FC
626 HV *oldhh = GvHV(PL_hintgv);
627 save_pushptri32ptr(oldhh, PL_hints, save_cophh, SAVEt_HINTS);
628 GvHV(PL_hintgv) = NULL; /* in case copying dies */
629 GvHV(PL_hintgv) = hv_copy_hints_hv(oldhh);
be84297e 630 } else {
20439bc7 631 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 632 }
be84297e
NC
633}
634
635static void
636S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
637 const int type)
638{
a3444cc5
DM
639 dSS_ADD;
640 SS_ADD_PTR(ptr1);
641 SS_ADD_INT(i);
642 SS_ADD_PTR(ptr2);
643 SS_ADD_UV(type);
644 SS_ADD_END(4);
da8315f8
NC
645}
646
647void
91d1c79f 648Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 649{
97aff369 650 dVAR;
bfc4de9f 651 SV *sv;
7918f24d 652
91d1c79f 653 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 654
0cbee0a4 655 SvGETMAGIC(*sptr);
be84297e
NC
656 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
657 SAVEt_AELEM);
1cdc9186
FC
658 /* The array needs to hold a reference count on its new element, so it
659 must be AvREAL. */
5dd42e15 660 if (!AvREAL(av) && AvREIFY(av))
1cdc9186 661 av_reify(av);
91d1c79f 662 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
663 if (flags & SAVEf_KEEPOLDELEM)
664 return;
bfc4de9f
DM
665 sv = *sptr;
666 /* If we're localizing a tied array element, this new sv
667 * won't actually be stored in the array - so it won't get
668 * reaped when the localize ends. Ensure it gets reaped by
669 * mortifying it instead. DAPM */
daeb922a 670 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 671 sv_2mortal(sv);
4e4c362e
GS
672}
673
674void
af7df257 675Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 676{
97aff369 677 dVAR;
bfc4de9f 678 SV *sv;
7918f24d 679
af7df257 680 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 681
0cbee0a4 682 SvGETMAGIC(*sptr);
a3444cc5
DM
683 {
684 dSS_ADD;
685 SS_ADD_PTR(SvREFCNT_inc_simple(hv));
686 SS_ADD_PTR(newSVsv(key));
687 SS_ADD_PTR(SvREFCNT_inc(*sptr));
688 SS_ADD_UV(SAVEt_HELEM);
689 SS_ADD_END(4);
690 }
af7df257 691 save_scalar_at(sptr, flags);
75d34a09
VP
692 if (flags & SAVEf_KEEPOLDELEM)
693 return;
bfc4de9f
DM
694 sv = *sptr;
695 /* If we're localizing a tied hash element, this new sv
696 * won't actually be stored in the hash - so it won't get
697 * reaped when the localize ends. Ensure it gets reaped by
698 * mortifying it instead. DAPM */
daeb922a 699 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 700 sv_2mortal(sv);
4e4c362e
GS
701}
702
2053acbf
NC
703SV*
704Perl_save_svref(pTHX_ SV **sptr)
705{
706 dVAR;
7918f24d
NC
707
708 PERL_ARGS_ASSERT_SAVE_SVREF;
709
2053acbf 710 SvGETMAGIC(*sptr);
e22024d3 711 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 712 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
713}
714
455ece5e 715I32
864dbfa3 716Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 717{
97aff369 718 dVAR;
eb578fdb
KW
719 const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
720 - (char*)PL_savestack);
1be36ce0
NC
721 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
722 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 723
1be36ce0
NC
724 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
725 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
726 elems, size, pad);
727
728 SSGROW(elems + 1);
455ece5e
AD
729
730 PL_savestack_ix += elems;
1be36ce0 731 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
732 return start;
733}
734
462e5cf6 735void
864dbfa3 736Perl_leave_scope(pTHX_ I32 base)
79072805 737{
97aff369 738 dVAR;
eb578fdb
KW
739 SV *sv;
740 SV *value;
741 GV *gv;
742 AV *av;
743 HV *hv;
20454177 744 void* ptr;
eb578fdb 745 char* str;
161b7d16 746 I32 i;
302c0c93 747 /* Localise the effects of the TAINT_NOT inside the loop. */
284167a5 748 bool was = TAINT_get;
79072805
LW
749
750 if (base < -1)
5637ef5b 751 Perl_croak(aTHX_ "panic: corrupt saved stack index %ld", (long) base);
1c98cc53
DM
752 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
753 (long)PL_savestack_ix, (long)base));
3280af22 754 while (PL_savestack_ix > base) {
c6bf6a65
NC
755 UV uv = SSPOPUV;
756 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
757 TAINT_NOT;
758
c6bf6a65 759 switch (type) {
79072805 760 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
761 value = MUTABLE_SV(SSPOPPTR);
762 sv = MUTABLE_SV(SSPOPPTR);
79072805 763 sv_replace(sv,value);
3280af22 764 PL_localizing = 2;
79072805 765 SvSETMAGIC(sv);
3280af22 766 PL_localizing = 0;
79072805 767 break;
8aacddc1 768 case SAVEt_SV: /* scalar reference */
ad64d0ec 769 value = MUTABLE_SV(SSPOPPTR);
159b6efe 770 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 771 ptr = &GvSV(gv);
502c6561 772 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
773 restore_sv:
774 sv = *(SV**)ptr;
2053acbf
NC
775 *(SV**)ptr = value;
776 SvREFCNT_dec(sv);
777 PL_localizing = 2;
778 SvSETMAGIC(value);
779 PL_localizing = 0;
780 SvREFCNT_dec(value);
9bfbb681 781 SvREFCNT_dec(av); /* av may actually be an AV, HV or GV */
2053acbf 782 break;
8aacddc1 783 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 784 ptr = SSPOPPTR;
b03d03b0 785 str = (char*)SSPOPPTR;
f4dd75d9
GS
786 if (*(char**)ptr != str) {
787 Safefree(*(char**)ptr);
788 *(char**)ptr = str;
789 }
790 break;
05ec9bb3
NIS
791 case SAVEt_SHARED_PVREF: /* shared pv */
792 str = (char*)SSPOPPTR;
793 ptr = SSPOPPTR;
794 if (*(char**)ptr != str) {
5e54c26f 795#ifdef NETWARE
9ecbcc42 796 PerlMem_free(*(char**)ptr);
5e54c26f 797#else
05ec9bb3 798 PerlMemShared_free(*(char**)ptr);
5e54c26f 799#endif
05ec9bb3
NIS
800 *(char**)ptr = str;
801 }
802 break;
f83b46a0
DM
803 case SAVEt_GVSV: /* scalar slot in GV */
804 value = MUTABLE_SV(SSPOPPTR);
805 gv = MUTABLE_GV(SSPOPPTR);
806 ptr = &GvSV(gv);
807 goto restore_svp;
8aacddc1 808 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 809 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 810 ptr = SSPOPPTR;
f83b46a0 811 restore_svp:
f4dd75d9
GS
812 sv = *(SV**)ptr;
813 *(SV**)ptr = value;
814 SvREFCNT_dec(sv);
b9d12d37
GS
815 SvREFCNT_dec(value);
816 break;
db9306af
FC
817 case SAVEt_GVSLOT: /* any slot in GV */
818 value = MUTABLE_SV(SSPOPPTR);
819 ptr = SSPOPPTR;
820 gv = MUTABLE_GV(SSPOPPTR);
821 hv = GvSTASH(gv);
822 if (hv && HvENAME(hv) && (
823 (value && SvTYPE(value) == SVt_PVCV)
824 || (*(SV **)ptr && SvTYPE(*(SV**)ptr) == SVt_PVCV)
825 ))
826 {
827 if ((char *)ptr < (char *)GvGP(gv)
828 || (char *)ptr > (char *)GvGP(gv) + sizeof(struct gp)
829 || GvREFCNT(gv) > 1)
830 PL_sub_generation++;
831 else mro_method_changed_in(hv);
832 }
833 goto restore_svp;
8aacddc1 834 case SAVEt_AV: /* array reference */
502c6561 835 av = MUTABLE_AV(SSPOPPTR);
159b6efe 836 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 837 SvREFCNT_dec(GvAV(gv));
8aacddc1 838 GvAV(gv) = av;
fb73857a 839 if (SvMAGICAL(av)) {
3280af22 840 PL_localizing = 2;
ad64d0ec 841 SvSETMAGIC(MUTABLE_SV(av));
3280af22 842 PL_localizing = 0;
fb73857a 843 }
01433346 844 SvREFCNT_dec(gv);
8aacddc1
NIS
845 break;
846 case SAVEt_HV: /* hash reference */
85fbaab2 847 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 848 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 849 SvREFCNT_dec(GvHV(gv));
8aacddc1 850 GvHV(gv) = hv;
fb73857a 851 if (SvMAGICAL(hv)) {
3280af22 852 PL_localizing = 2;
ad64d0ec 853 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 854 PL_localizing = 0;
fb73857a 855 }
01433346 856 SvREFCNT_dec(gv);
8aacddc1 857 break;
994d373a
NC
858 case SAVEt_INT_SMALL:
859 ptr = SSPOPPTR;
860 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
861 break;
79072805
LW
862 case SAVEt_INT: /* int reference */
863 ptr = SSPOPPTR;
864 *(int*)ptr = (int)SSPOPINT;
865 break;
9febdf04
RH
866 case SAVEt_BOOL: /* bool reference */
867 ptr = SSPOPPTR;
65504245 868 *(bool*)ptr = cBOOL(uv >> 8);
284167a5 869#if !NO_TAINT_SUPPORT
173c3f27 870 if (ptr == &(TAINT_get)) {
b6f93e7a
KW
871 /* If we don't update <was>, to reflect what was saved on the
872 * stack for PL_tainted, then we will overwrite this attempt to
873 * restore it when we exit this routine. Note that this won't
874 * work if this value was saved in a wider-than necessary type,
875 * such as I32 */
876 was = *(bool*)ptr;
877 }
284167a5 878#endif
9febdf04 879 break;
89abef21
NC
880 case SAVEt_I32_SMALL:
881 ptr = SSPOPPTR;
882 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
883 break;
79072805
LW
884 case SAVEt_I32: /* I32 reference */
885 ptr = SSPOPPTR;
3235b7a3
NC
886#ifdef PERL_DEBUG_READONLY_OPS
887 {
888 const I32 val = SSPOPINT;
889 if (*(I32*)ptr != val)
890 *(I32*)ptr = val;
891 }
892#else
79072805 893 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 894#endif
79072805
LW
895 break;
896 case SAVEt_SPTR: /* SV* reference */
897 ptr = SSPOPPTR;
ad64d0ec 898 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 899 break;
146174a9 900 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
901 case SAVEt_PPTR: /* char* reference */
902 ptr = SSPOPPTR;
903 *(char**)ptr = (char*)SSPOPPTR;
904 break;
79072805
LW
905 case SAVEt_HPTR: /* HV* reference */
906 ptr = SSPOPPTR;
85fbaab2 907 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
908 break;
909 case SAVEt_APTR: /* AV* reference */
910 ptr = SSPOPPTR;
502c6561 911 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 912 break;
fb73857a 913 case SAVEt_GP: /* scalar reference */
10507e11 914 ptr = SSPOPPTR;
159b6efe 915 gv = MUTABLE_GV(SSPOPPTR);
4e52a9b6
FC
916 {
917 /* possibly taking a method out of circulation */
918 const bool had_method = !!GvCVu(gv);
919 gp_free(gv);
920 GvGP_set(gv, (GP*)ptr);
921 if ((hv=GvSTASH(gv)) && HvENAME_get(hv)) {
3d460042
FC
922 if (GvNAMELEN(gv) == 3 && strnEQ(GvNAME(gv), "ISA", 3))
923 mro_isa_changed_in(hv);
4e52a9b6 924 else if (had_method || GvCVu(gv))
3d460042 925 /* putting a method back into circulation ("local")*/
978a498e 926 gv_method_changed(gv);
4e52a9b6 927 }
3d460042 928 }
4633a7c4 929 SvREFCNT_dec(gv);
8aacddc1 930 break;
8990e307
LW
931 case SAVEt_FREESV:
932 ptr = SSPOPPTR;
ad64d0ec 933 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 934 break;
3987a177
Z
935 case SAVEt_FREECOPHH:
936 ptr = SSPOPPTR;
937 cophh_free((COPHH *)ptr);
938 break;
26d9b02f
JH
939 case SAVEt_MORTALIZESV:
940 ptr = SSPOPPTR;
ad64d0ec 941 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 942 break;
8990e307
LW
943 case SAVEt_FREEOP:
944 ptr = SSPOPPTR;
5e5ba94b 945 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP");
8990e307
LW
946 op_free((OP*)ptr);
947 break;
948 case SAVEt_FREEPV:
949 ptr = SSPOPPTR;
1df70142 950 Safefree(ptr);
8990e307 951 break;
4e09461c
DM
952
953 {
954 SV **svp;
955 case SAVEt_CLEARPADRANGE:
956 i = (I32)((uv >> SAVE_TIGHT_SHIFT) & OPpPADRANGE_COUNTMASK);
957 svp = &PL_curpad[uv >>
958 (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)] + i - 1;
959 goto clearsv;
8990e307 960 case SAVEt_CLEARSV:
4e09461c
DM
961 svp = &PL_curpad[uv >> SAVE_TIGHT_SHIFT];
962 i = 1;
963 clearsv:
964 for (; i; i--, svp--) {
528ad060
DM
965 sv = *svp;
966
967 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
968 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
969 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
970 (long)(svp-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
971 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
972 ));
973
974 /* Can clear pad variable in place? */
975 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
976 /*
977 * if a my variable that was made readonly is going out of
978 * scope, we want to remove the readonlyness so that it can
979 * go out of scope quietly
980 */
981 if (SvPADMY(sv) && !SvFAKE(sv))
982 SvREADONLY_off(sv);
983
984 if (SvTHINKFIRST(sv))
985 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF
986 |SV_COW_DROP_PV);
987 if (SvTYPE(sv) == SVt_PVHV)
988 Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv));
989 if (SvMAGICAL(sv))
990 {
991 sv_unmagic(sv, PERL_MAGIC_backref);
992 if (SvTYPE(sv) != SVt_PVCV)
993 mg_free(sv);
994 }
995
996 switch (SvTYPE(sv)) {
997 case SVt_NULL:
998 break;
999 case SVt_PVAV:
1000 av_clear(MUTABLE_AV(sv));
1001 break;
1002 case SVt_PVHV:
1003 hv_clear(MUTABLE_HV(sv));
1004 break;
1005 case SVt_PVCV:
1006 {
1007 HEK * const hek = CvNAME_HEK((CV *)sv);
1008 assert(hek);
1009 share_hek_hek(hek);
1010 cv_undef((CV *)sv);
1011 CvNAME_HEK_set(sv, hek);
1012 break;
1013 }
1014 default:
1015 SvOK_off(sv);
1016 break;
1017 }
1018 SvPADSTALE_on(sv); /* mark as no longer live */
1019 }
1020 else { /* Someone has a claim on this, so abandon it. */
1021 assert( SvFLAGS(sv) & SVs_PADMY);
1022 assert(!(SvFLAGS(sv) & SVs_PADTMP));
1023 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
1024 case SVt_PVAV: *svp = MUTABLE_SV(newAV()); break;
1025 case SVt_PVHV: *svp = MUTABLE_SV(newHV()); break;
1026 case SVt_PVCV:
1027 {
1028 /* Create a stub */
1029 *svp = newSV_type(SVt_PVCV);
1030
1031 /* Share name */
1032 assert(CvNAMED(sv));
1033 CvNAME_HEK_set(*svp,
1034 share_hek_hek(CvNAME_HEK((CV *)sv)));
1035 break;
1036 }
1037 default: *svp = newSV(0); break;
1038 }
1039 SvREFCNT_dec(sv); /* Cast current value to the winds. */
1040 /* preserve pad nature, but also mark as not live
1041 * for any closure capturing */
1042 SvFLAGS(*svp) |= (SVs_PADMY|SVs_PADSTALE);
1043 }
4e09461c 1044 }
8990e307 1045 break;
4e09461c 1046 }
8990e307
LW
1047 case SAVEt_DELETE:
1048 ptr = SSPOPPTR;
85fbaab2 1049 hv = MUTABLE_HV(ptr);
35d4f826 1050 i = SSPOPINT;
8990e307 1051 ptr = SSPOPPTR;
35d4f826 1052 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 1053 SvREFCNT_dec(hv);
8aacddc1 1054 Safefree(ptr);
8990e307 1055 break;
c68ec7a9
VP
1056 case SAVEt_ADELETE:
1057 ptr = SSPOPPTR;
1058 av = MUTABLE_AV(ptr);
1059 i = SSPOPINT;
1060 (void)av_delete(av, i, G_DISCARD);
1061 SvREFCNT_dec(av);
1062 break;
146174a9
CB
1063 case SAVEt_DESTRUCTOR_X:
1064 ptr = SSPOPPTR;
acfe0abc 1065 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
1066 break;
1067 case SAVEt_REGCONTEXT:
e0fa7e2b 1068 /* regexp must have croaked */
455ece5e 1069 case SAVEt_ALLOC:
1be36ce0 1070 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 1071 break;
55497cff 1072 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 1073 i = SSPOPINT;
3280af22 1074 PL_stack_sp = PL_stack_base + i;
55497cff 1075 break;
ea8d6ae1
DB
1076 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
1077 i = SSPOPINT;
1078 cxstack[i].blk_oldsp = SSPOPINT;
1079 break;
161b7d16 1080 case SAVEt_AELEM: /* array element */
ad64d0ec 1081 value = MUTABLE_SV(SSPOPPTR);
161b7d16 1082 i = SSPOPINT;
502c6561 1083 av = MUTABLE_AV(SSPOPPTR);
658aef79 1084 ptr = av_fetch(av,i,1);
5dd42e15
DM
1085 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
1086 SvREFCNT_dec(value);
4e4c362e
GS
1087 if (ptr) {
1088 sv = *(SV**)ptr;
3280af22 1089 if (sv && sv != &PL_sv_undef) {
ad64d0ec 1090 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 1091 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
1092 goto restore_sv;
1093 }
1094 }
1095 SvREFCNT_dec(av);
1096 SvREFCNT_dec(value);
1097 break;
161b7d16 1098 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
1099 value = MUTABLE_SV(SSPOPPTR);
1100 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 1101 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 1102 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 1103 SvREFCNT_dec(sv);
4e4c362e 1104 if (ptr) {
35a4481c 1105 const SV * const oval = HeVAL((HE*)ptr);
3280af22 1106 if (oval && oval != &PL_sv_undef) {
4e4c362e 1107 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1108 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1109 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1110 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1111 goto restore_sv;
1112 }
1113 }
1114 SvREFCNT_dec(hv);
4e4c362e
GS
1115 SvREFCNT_dec(value);
1116 break;
462e5cf6 1117 case SAVEt_OP:
533c011a 1118 PL_op = (OP*)SSPOPPTR;
462e5cf6 1119 break;
25eaa213 1120 case SAVEt_HINTS:
3607ca02
FC
1121 if ((PL_hints & HINT_LOCALIZE_HH)) {
1122 while (GvHV(PL_hintgv)) {
2653c1e3 1123 HV *hv = GvHV(PL_hintgv);
045ac317 1124 GvHV(PL_hintgv) = NULL;
2653c1e3 1125 SvREFCNT_dec(MUTABLE_SV(hv));
3607ca02 1126 }
045ac317 1127 }
20439bc7
Z
1128 cophh_free(CopHINTHASH_get(&PL_compiling));
1129 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1130 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1131 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1132 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1133 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
2653c1e3
DM
1134 }
1135 if (!GvHV(PL_hintgv)) {
a3fb8386
FC
1136 /* Need to add a new one manually, else rv2hv can
1137 add one via GvHVn and it won't have the magic set. */
5b9c0671
NC
1138 HV *const hv = newHV();
1139 hv_magic(hv, NULL, PERL_MAGIC_hints);
1140 GvHV(PL_hintgv) = hv;
dfa41748 1141 }
5b9c0671 1142 assert(GvHV(PL_hintgv));
b3ac6de7 1143 break;
cb50131a 1144 case SAVEt_COMPPAD:
f3548bdc 1145 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1146 if (PL_comppad)
cb50131a
CB
1147 PL_curpad = AvARRAY(PL_comppad);
1148 else
4608196e 1149 PL_curpad = NULL;
cb50131a 1150 break;
09edbca0 1151 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1152 {
35a4481c 1153 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1154 SV **svp;
c3564e5c 1155 ptr = SSPOPPTR;
09edbca0
NC
1156 assert (ptr);
1157 svp = AvARRAY((PAD*)ptr) + off;
1158 /* This mortalizing used to be done by POPLOOP() via itersave.
1159 But as we have all the information here, we can do it here,
1160 save even having to have itersave in the struct. */
1161 sv_2mortal(*svp);
ad64d0ec 1162 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1163 }
1164 break;
8b7059b1
DM
1165 case SAVEt_SAVESWITCHSTACK:
1166 {
1167 dSP;
502c6561
NC
1168 AV *const t = MUTABLE_AV(SSPOPPTR);
1169 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1170 SWITCHSTACK(t,f);
1171 PL_curstackinfo->si_stack = f;
1172 }
1173 break;
14f338dc
DM
1174 case SAVEt_SET_SVFLAGS:
1175 {
35a4481c
AL
1176 const U32 val = (U32)SSPOPINT;
1177 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1178 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1179 SvFLAGS(sv) &= ~mask;
1180 SvFLAGS(sv) |= val;
1181 }
1182 break;
95e06916
NC
1183
1184 /* This would be a mathom, but Perl_save_svref() calls a static
1185 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1186 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1187 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1188 ptr = SSPOPPTR;
1189 av = NULL; /* what to refcnt_dec */
1190 goto restore_sv;
95e06916
NC
1191
1192 /* These are only saved in mathoms.c */
1193 case SAVEt_NSTAB:
159b6efe 1194 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1195 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1196 break;
2053acbf
NC
1197 case SAVEt_LONG: /* long reference */
1198 ptr = SSPOPPTR;
1199 *(long*)ptr = (long)SSPOPLONG;
1200 break;
95e06916
NC
1201 case SAVEt_IV: /* IV reference */
1202 ptr = SSPOPPTR;
1203 *(IV*)ptr = (IV)SSPOPIV;
1204 break;
1205
2053acbf
NC
1206 case SAVEt_I16: /* I16 reference */
1207 ptr = SSPOPPTR;
c9441fce 1208 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1209 break;
1210 case SAVEt_I8: /* I8 reference */
1211 ptr = SSPOPPTR;
6c61c2d4 1212 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1213 break;
2053acbf
NC
1214 case SAVEt_DESTRUCTOR:
1215 ptr = SSPOPPTR;
1216 (*SSPOPDPTR)(ptr);
1217 break;
68da3b2f
NC
1218 case SAVEt_COMPILE_WARNINGS:
1219 ptr = SSPOPPTR;
72dc9ed5 1220
68da3b2f
NC
1221 if (!specialWARN(PL_compiling.cop_warnings))
1222 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1223
10edeb5d 1224 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1225 break;
1ade1aa1
NC
1226 case SAVEt_RE_STATE:
1227 {
1228 const struct re_save_state *const state
1229 = (struct re_save_state *)
1230 (PL_savestack + PL_savestack_ix
1231 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1232 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1233
1ade1aa1
NC
1234 if (PL_reg_poscache != state->re_state_reg_poscache) {
1235 Safefree(PL_reg_poscache);
1ade1aa1 1236 }
46ab3289 1237 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1238 }
1239 break;
7c197c94
DM
1240 case SAVEt_PARSER:
1241 ptr = SSPOPPTR;
1242 parser_free((yy_parser *) ptr);
1243 break;
79072805 1244 default:
5637ef5b 1245 Perl_croak(aTHX_ "panic: leave_scope inconsistency %u", type);
79072805
LW
1246 }
1247 }
302c0c93 1248
284167a5 1249 TAINT_set(was);
f410a211
NC
1250
1251 PERL_ASYNC_CHECK();
79072805 1252}
8990e307 1253
8990e307 1254void
864dbfa3 1255Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1256{
97aff369 1257 dVAR;
7918f24d
NC
1258
1259 PERL_ARGS_ASSERT_CX_DUMP;
1260
35ff7856 1261#ifdef DEBUGGING
22c35a8c 1262 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1263 if (CxTYPE(cx) != CXt_SUBST) {
e8d9e9d0 1264 const char *gimme_text;
760ac839 1265 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1266 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1267 PTR2UV(cx->blk_oldcop));
760ac839
LW
1268 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1269 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1270 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1271 PTR2UV(cx->blk_oldpm));
e8d9e9d0
VP
1272 switch (cx->blk_gimme) {
1273 case G_VOID:
1274 gimme_text = "VOID";
1275 break;
1276 case G_SCALAR:
1277 gimme_text = "SCALAR";
1278 break;
1279 case G_ARRAY:
1280 gimme_text = "LIST";
1281 break;
1282 default:
1283 gimme_text = "UNKNOWN";
1284 break;
1285 }
1286 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", gimme_text);
8990e307 1287 }
6b35e009 1288 switch (CxTYPE(cx)) {
8990e307
LW
1289 case CXt_NULL:
1290 case CXt_BLOCK:
1291 break;
146174a9 1292 case CXt_FORMAT:
f9c764c5
NC
1293 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1294 PTR2UV(cx->blk_format.cv));
1295 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1296 PTR2UV(cx->blk_format.gv));
1297 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1298 PTR2UV(cx->blk_format.dfoutgv));
1299 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1300 (int)CxHASARGS(cx));
f9c764c5
NC
1301 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1302 PTR2UV(cx->blk_format.retop));
146174a9 1303 break;
8990e307 1304 case CXt_SUB:
146174a9
CB
1305 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1306 PTR2UV(cx->blk_sub.cv));
760ac839 1307 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1308 (long)cx->blk_sub.olddepth);
760ac839 1309 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1310 (int)CxHASARGS(cx));
1311 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1312 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1313 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1314 break;
1315 case CXt_EVAL:
760ac839 1316 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1317 (long)CxOLD_IN_EVAL(cx));
760ac839 1318 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1319 PL_op_name[CxOLD_OP_TYPE(cx)],
1320 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1321 if (cx->blk_eval.old_namesv)
1322 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1323 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1324 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1325 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1326 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1327 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1328 break;
1329
c6fdafd0 1330 case CXt_LOOP_LAZYIV:
d01136d6 1331 case CXt_LOOP_LAZYSV:
3b719c58
NC
1332 case CXt_LOOP_FOR:
1333 case CXt_LOOP_PLAIN:
0cbdab38 1334 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1335 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1336 (long)cx->blk_loop.resetsp);
022eaa24
NC
1337 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1338 PTR2UV(cx->blk_loop.my_op));
d01136d6 1339 /* XXX: not accurate for LAZYSV/IV */
146174a9 1340 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1341 PTR2UV(cx->blk_loop.state_u.ary.ary));
1342 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1343 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1344 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1345 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1346 break;
1347
1348 case CXt_SUBST:
760ac839 1349 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1350 (long)cx->sb_iters);
760ac839 1351 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1352 (long)cx->sb_maxiters);
35ef4773
GS
1353 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1354 (long)cx->sb_rflags);
760ac839 1355 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1356 (long)CxONCE(cx));
760ac839 1357 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1358 cx->sb_orig);
146174a9
CB
1359 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1360 PTR2UV(cx->sb_dstr));
1361 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1362 PTR2UV(cx->sb_targ));
1363 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1364 PTR2UV(cx->sb_s));
1365 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1366 PTR2UV(cx->sb_m));
1367 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1368 PTR2UV(cx->sb_strend));
1369 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1370 PTR2UV(cx->sb_rxres));
8990e307
LW
1371 break;
1372 }
65e66c80 1373#else
96a5add6 1374 PERL_UNUSED_CONTEXT;
65e66c80 1375 PERL_UNUSED_ARG(cx);
17c3b450 1376#endif /* DEBUGGING */
35ff7856 1377}
241d1a3b
NC
1378
1379/*
1380 * Local variables:
1381 * c-indentation-style: bsd
1382 * c-basic-offset: 4
14d04a33 1383 * indent-tabs-mode: nil
241d1a3b
NC
1384 * End:
1385 *
14d04a33 1386 * ex: set ts=8 sts=4 sw=4 et:
37442d52 1387 */