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