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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);
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 */
901017d6 163 SV* const sv = PL_tmps_stack[PL_tmps_ix];
a0714e2c 164 PL_tmps_stack[PL_tmps_ix--] = NULL;
8aacddc1 165 if (sv && sv != &PL_sv_undef) {
463ee0b2 166 SvTEMP_off(sv);
8990e307 167 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 168 }
79072805
LW
169 }
170}
171
76e3520e 172STATIC SV *
af7df257 173S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 174{
97aff369 175 dVAR;
75d34a09
VP
176 SV * osv;
177 register SV *sv;
79072805 178
7918f24d
NC
179 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
180
75d34a09
VP
181 osv = *sptr;
182 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
183
a0d0e21e 184 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
a0d0e21e 185 if (SvGMAGICAL(osv)) {
35a4481c 186 const bool oldtainted = PL_tainted;
a0d0e21e 187 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 188 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
3280af22 189 PL_tainted = oldtainted;
a0d0e21e 190 }
75d34a09
VP
191 if (!(flags & SAVEf_KEEPOLDELEM))
192 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
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;
202 SSCHECK(3);
203 SSPUSHPTR(ptr1);
204 SSPUSHPTR(ptr2);
c6bf6a65 205 SSPUSHUV(type);
e22024d3
NC
206}
207
7a4c00b4 208SV *
864dbfa3 209Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 210{
97aff369 211 dVAR;
fb4fc1fa 212 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
213
214 PERL_ARGS_ASSERT_SAVE_SCALAR;
215
27cc343c 216 PL_localizing = 1;
0cbee0a4 217 SvGETMAGIC(*sptr);
27cc343c 218 PL_localizing = 0;
e22024d3 219 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 220 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
221}
222
f4dd75d9 223/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
224 * restore a global SV to its prior contents, freeing new value. */
225void
864dbfa3 226Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 227{
97aff369 228 dVAR;
7918f24d
NC
229
230 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
231
e22024d3 232 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
233}
234
f4dd75d9
GS
235/* Like save_pptr(), but also Safefree()s the new value if it is different
236 * from the old one. Can be used to restore a global char* to its prior
237 * contents, freeing new value. */
238void
239Perl_save_generic_pvref(pTHX_ char **str)
240{
97aff369 241 dVAR;
7918f24d
NC
242
243 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
244
e22024d3 245 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
246}
247
05ec9bb3
NIS
248/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
249 * Can be used to restore a shared global char* to its prior
250 * contents, freeing new value. */
251void
252Perl_save_shared_pvref(pTHX_ char **str)
253{
97aff369 254 dVAR;
7918f24d
NC
255
256 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
257
e22024d3 258 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
259}
260
14f338dc
DM
261/* set the SvFLAGS specified by mask to the values in val */
262
263void
264Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
265{
97aff369 266 dVAR;
7918f24d
NC
267
268 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
269
14f338dc
DM
270 SSCHECK(4);
271 SSPUSHPTR(sv);
272 SSPUSHINT(mask);
273 SSPUSHINT(val);
c6bf6a65 274 SSPUSHUV(SAVEt_SET_SVFLAGS);
14f338dc
DM
275}
276
79072805 277void
864dbfa3 278Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 279{
97aff369 280 dVAR;
7918f24d
NC
281
282 PERL_ARGS_ASSERT_SAVE_GP;
283
b9e00b79
LRG
284 SSCHECK(4);
285 SSPUSHINT(SvFAKE(gv));
286 SSPUSHPTR(GvGP(gv));
287 SSPUSHPTR(SvREFCNT_inc(gv));
86e10ae1 288 SSPUSHUV(SAVEt_GP);
b9e00b79
LRG
289
290 /* Don't let the localized GV coerce into non-glob, otherwise we would
291 * not be able to restore GP upon leave from context if that happened */
292 SvFAKE_off(gv);
79072805 293
5f05dabc 294 if (empty) {
12816592 295 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 296
fae75791 297 if (GvCVu(gv))
e1a479c5 298 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
299 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
300 gp->gp_io = newIO();
301 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
302 }
72651472
NC
303#ifdef PERL_DONT_CREATE_GVSV
304 if (gv == PL_errgv) {
305 /* We could scatter this logic everywhere by changing the
306 definition of ERRSV from GvSV() to GvSVn(), but it seems more
307 efficient to do this check once here. */
308 gp->gp_sv = newSV(0);
309 }
310#endif
12816592 311 GvGP(gv) = gp;
5f05dabc
PP
312 }
313 else {
44a8e56a 314 gp_ref(GvGP(gv));
5f05dabc
PP
315 GvINTRO_on(gv);
316 }
79072805 317}
79072805 318
79072805 319AV *
864dbfa3 320Perl_save_ary(pTHX_ GV *gv)
79072805 321{
97aff369 322 dVAR;
901017d6 323 AV * const oav = GvAVn(gv);
67a38de0 324 AV *av;
fb73857a 325
7918f24d
NC
326 PERL_ARGS_ASSERT_SAVE_ARY;
327
67a38de0
NIS
328 if (!AvREAL(oav) && AvREIFY(oav))
329 av_reify(oav);
e22024d3 330 save_pushptrptr(gv, oav, SAVEt_AV);
79072805 331
4608196e 332 GvAV(gv) = NULL;
fb73857a 333 av = GvAVn(gv);
0cbee0a4 334 if (SvMAGIC(oav))
9711599e 335 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 336 return av;
79072805
LW
337}
338
339HV *
864dbfa3 340Perl_save_hash(pTHX_ GV *gv)
79072805 341{
97aff369 342 dVAR;
fb73857a
PP
343 HV *ohv, *hv;
344
7918f24d
NC
345 PERL_ARGS_ASSERT_SAVE_HASH;
346
e22024d3 347 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
79072805 348
4608196e 349 GvHV(gv) = NULL;
fb73857a 350 hv = GvHVn(gv);
0cbee0a4 351 if (SvMAGIC(ohv))
9711599e 352 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 353 return hv;
79072805
LW
354}
355
356void
864dbfa3 357Perl_save_item(pTHX_ register SV *item)
79072805 358{
97aff369 359 dVAR;
901017d6 360 register SV * const sv = newSVsv(item);
79072805 361
7918f24d
NC
362 PERL_ARGS_ASSERT_SAVE_ITEM;
363
e22024d3
NC
364 save_pushptrptr(item, /* remember the pointer */
365 sv, /* remember the value */
366 SAVEt_ITEM);
79072805
LW
367}
368
369void
1409bc06 370Perl_save_bool(pTHX_ bool *boolp)
79072805 371{
97aff369 372 dVAR;
7918f24d 373
1409bc06 374 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 375
79072805 376 SSCHECK(3);
1409bc06
NC
377 SSPUSHBOOL(*boolp);
378 SSPUSHPTR(boolp);
c6bf6a65 379 SSPUSHUV(SAVEt_BOOL);
1409bc06
NC
380}
381
7623d426
NC
382void
383Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
384{
385 dVAR;
386 SSCHECK(3);
387 SSPUSHINT(i);
388 SSPUSHPTR(ptr);
c6bf6a65 389 SSPUSHUV(type);
79072805
LW
390}
391
392void
1409bc06 393Perl_save_int(pTHX_ int *intp)
9febdf04 394{
97aff369 395 dVAR;
7918f24d 396
1409bc06 397 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 398
1409bc06 399 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
400}
401
402void
58188858
RGS
403Perl_save_I8(pTHX_ I8 *bytep)
404{
405 dVAR;
7918f24d
NC
406
407 PERL_ARGS_ASSERT_SAVE_I8;
408
1409bc06 409 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
58188858
RGS
410}
411
412void
87a84751
JH
413Perl_save_I16(pTHX_ I16 *intp)
414{
415 dVAR;
7918f24d
NC
416
417 PERL_ARGS_ASSERT_SAVE_I16;
418
1409bc06 419 save_pushi32ptr(*intp, intp, SAVEt_I16);
87a84751
JH
420}
421
422void
864dbfa3 423Perl_save_I32(pTHX_ I32 *intp)
79072805 424{
97aff369 425 dVAR;
7918f24d
NC
426
427 PERL_ARGS_ASSERT_SAVE_I32;
428
1409bc06 429 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
430}
431
85e6fe83
LW
432/* Cannot use save_sptr() to store a char* since the SV** cast will
433 * force word-alignment and we'll miss the pointer.
434 */
435void
864dbfa3 436Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 437{
97aff369 438 dVAR;
7918f24d
NC
439
440 PERL_ARGS_ASSERT_SAVE_PPTR;
441
e22024d3 442 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
443}
444
79072805 445void
146174a9
CB
446Perl_save_vptr(pTHX_ void *ptr)
447{
97aff369 448 dVAR;
7918f24d
NC
449
450 PERL_ARGS_ASSERT_SAVE_VPTR;
451
e22024d3 452 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
453}
454
455void
864dbfa3 456Perl_save_sptr(pTHX_ SV **sptr)
79072805 457{
97aff369 458 dVAR;
7918f24d
NC
459
460 PERL_ARGS_ASSERT_SAVE_SPTR;
461
e22024d3 462 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
463}
464
c3564e5c 465void
09edbca0 466Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 467{
97aff369 468 dVAR;
c3564e5c 469 SSCHECK(4);
f3548bdc 470 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 471 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 472 SSPUSHPTR(PL_comppad);
c3564e5c 473 SSPUSHLONG((long)off);
c6bf6a65 474 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
475}
476
79072805 477void
864dbfa3 478Perl_save_hptr(pTHX_ HV **hptr)
79072805 479{
97aff369 480 dVAR;
7918f24d
NC
481
482 PERL_ARGS_ASSERT_SAVE_HPTR;
483
e22024d3 484 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
485}
486
487void
864dbfa3 488Perl_save_aptr(pTHX_ AV **aptr)
79072805 489{
97aff369 490 dVAR;
7918f24d
NC
491
492 PERL_ARGS_ASSERT_SAVE_APTR;
493
e22024d3 494 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
495}
496
497void
2fd8beea 498Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 499{
97aff369 500 dVAR;
8990e307 501 SSCHECK(2);
2fd8beea 502 SSPUSHPTR(ptr);
c6bf6a65 503 SSPUSHUV(type);
8990e307
LW
504}
505
506void
864dbfa3 507Perl_save_clearsv(pTHX_ SV **svp)
8990e307 508{
97aff369 509 dVAR;
cdcdfc56
NC
510 const UV offset = svp - PL_curpad;
511 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
512
513 PERL_ARGS_ASSERT_SAVE_CLEARSV;
514
f3548bdc 515 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
516 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
517 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
518 offset, svp, PL_curpad);
519
520 SSCHECK(1);
521 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 522 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
523}
524
525void
864dbfa3 526Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 527{
97aff369 528 dVAR;
7918f24d
NC
529
530 PERL_ARGS_ASSERT_SAVE_DELETE;
531
85a721ca 532 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
533}
534
535void
af097752
VP
536Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
537{
538 STRLEN len;
539 I32 klen;
540 const char *key;
541
542 PERL_ARGS_ASSERT_SAVE_HDELETE;
543
544 key = SvPV_const(keysv, len);
545 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
546 SvREFCNT_inc_simple_void_NN(hv);
547 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
548}
549
550void
c68ec7a9
VP
551Perl_save_adelete(pTHX_ AV *av, I32 key)
552{
553 dVAR;
554
555 PERL_ARGS_ASSERT_SAVE_ADELETE;
556
557 SvREFCNT_inc_void(av);
558 save_pushi32ptr(key, av, SAVEt_ADELETE);
559}
560
561void
12ab1f58
JH
562Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
563{
564 dVAR;
7918f24d
NC
565
566 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
567
12ab1f58
JH
568 SSCHECK(3);
569 SSPUSHDPTR(f);
570 SSPUSHPTR(p);
c6bf6a65 571 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
572}
573
574void
146174a9
CB
575Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
576{
97aff369 577 dVAR;
146174a9
CB
578 SSCHECK(3);
579 SSPUSHDXPTR(f);
580 SSPUSHPTR(p);
c6bf6a65 581 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
582}
583
584void
da8315f8
NC
585Perl_save_hints(pTHX)
586{
587 dVAR;
588 if (PL_compiling.cop_hints_hash) {
589 HINTS_REFCNT_LOCK;
590 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
591 HINTS_REFCNT_UNLOCK;
592 }
da8315f8 593 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
594 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
595 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 596 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
597 } else {
598 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 599 }
be84297e
NC
600}
601
602static void
603S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
604 const int type)
605{
606 SSCHECK(4);
607 SSPUSHPTR(ptr1);
608 SSPUSHINT(i);
609 SSPUSHPTR(ptr2);
c6bf6a65 610 SSPUSHUV(type);
da8315f8
NC
611}
612
613void
91d1c79f 614Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 615{
97aff369 616 dVAR;
bfc4de9f 617 SV *sv;
7918f24d 618
91d1c79f 619 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 620
0cbee0a4 621 SvGETMAGIC(*sptr);
be84297e
NC
622 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
623 SAVEt_AELEM);
5dd42e15
DM
624 /* if it gets reified later, the restore will have the wrong refcnt */
625 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 626 SvREFCNT_inc_void(*sptr);
91d1c79f 627 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
628 if (flags & SAVEf_KEEPOLDELEM)
629 return;
bfc4de9f
DM
630 sv = *sptr;
631 /* If we're localizing a tied array element, this new sv
632 * won't actually be stored in the array - so it won't get
633 * reaped when the localize ends. Ensure it gets reaped by
634 * mortifying it instead. DAPM */
daeb922a 635 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 636 sv_2mortal(sv);
4e4c362e
GS
637}
638
639void
af7df257 640Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 641{
97aff369 642 dVAR;
bfc4de9f 643 SV *sv;
7918f24d 644
af7df257 645 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 646
0cbee0a4 647 SvGETMAGIC(*sptr);
4e4c362e 648 SSCHECK(4);
b37c2d43 649 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 650 SSPUSHPTR(newSVsv(key));
4e4c362e 651 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 652 SSPUSHUV(SAVEt_HELEM);
af7df257 653 save_scalar_at(sptr, flags);
75d34a09
VP
654 if (flags & SAVEf_KEEPOLDELEM)
655 return;
bfc4de9f
DM
656 sv = *sptr;
657 /* If we're localizing a tied hash element, this new sv
658 * won't actually be stored in the hash - so it won't get
659 * reaped when the localize ends. Ensure it gets reaped by
660 * mortifying it instead. DAPM */
daeb922a 661 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 662 sv_2mortal(sv);
4e4c362e
GS
663}
664
2053acbf
NC
665SV*
666Perl_save_svref(pTHX_ SV **sptr)
667{
668 dVAR;
7918f24d
NC
669
670 PERL_ARGS_ASSERT_SAVE_SVREF;
671
2053acbf 672 SvGETMAGIC(*sptr);
e22024d3 673 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 674 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
675}
676
455ece5e 677I32
864dbfa3 678Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 679{
97aff369 680 dVAR;
35a4481c 681 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 682 - (char*)PL_savestack);
35a4481c 683 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
455ece5e 684
1bb4c835 685 SSGROW(elems + 2);
455ece5e
AD
686
687 PL_savestack_ix += elems;
688 SSPUSHINT(elems);
c6bf6a65 689 SSPUSHUV(SAVEt_ALLOC);
455ece5e
AD
690 return start;
691}
692
462e5cf6 693void
864dbfa3 694Perl_leave_scope(pTHX_ I32 base)
79072805 695{
97aff369 696 dVAR;
79072805
LW
697 register SV *sv;
698 register SV *value;
699 register GV *gv;
700 register AV *av;
701 register HV *hv;
20454177 702 void* ptr;
f4dd75d9 703 register char* str;
161b7d16 704 I32 i;
302c0c93
NC
705 /* Localise the effects of the TAINT_NOT inside the loop. */
706 const bool was = PL_tainted;
79072805
LW
707
708 if (base < -1)
cea2e8a9 709 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
710 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
711 (long)PL_savestack_ix, (long)base));
3280af22 712 while (PL_savestack_ix > base) {
c6bf6a65
NC
713 UV uv = SSPOPUV;
714 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
715 TAINT_NOT;
716
c6bf6a65 717 switch (type) {
79072805 718 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
719 value = MUTABLE_SV(SSPOPPTR);
720 sv = MUTABLE_SV(SSPOPPTR);
79072805 721 sv_replace(sv,value);
3280af22 722 PL_localizing = 2;
79072805 723 SvSETMAGIC(sv);
3280af22 724 PL_localizing = 0;
79072805 725 break;
8aacddc1 726 case SAVEt_SV: /* scalar reference */
ad64d0ec 727 value = MUTABLE_SV(SSPOPPTR);
159b6efe 728 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 729 ptr = &GvSV(gv);
502c6561 730 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
731 restore_sv:
732 sv = *(SV**)ptr;
2053acbf
NC
733 *(SV**)ptr = value;
734 SvREFCNT_dec(sv);
735 PL_localizing = 2;
736 SvSETMAGIC(value);
737 PL_localizing = 0;
738 SvREFCNT_dec(value);
739 if (av) /* actually an av, hv or gv */
740 SvREFCNT_dec(av);
741 break;
8aacddc1 742 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 743 ptr = SSPOPPTR;
b03d03b0 744 str = (char*)SSPOPPTR;
f4dd75d9
GS
745 if (*(char**)ptr != str) {
746 Safefree(*(char**)ptr);
747 *(char**)ptr = str;
748 }
749 break;
05ec9bb3
NIS
750 case SAVEt_SHARED_PVREF: /* shared pv */
751 str = (char*)SSPOPPTR;
752 ptr = SSPOPPTR;
753 if (*(char**)ptr != str) {
5e54c26f 754#ifdef NETWARE
9ecbcc42 755 PerlMem_free(*(char**)ptr);
5e54c26f 756#else
05ec9bb3 757 PerlMemShared_free(*(char**)ptr);
5e54c26f 758#endif
05ec9bb3
NIS
759 *(char**)ptr = str;
760 }
761 break;
8aacddc1 762 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 763 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 764 ptr = SSPOPPTR;
f4dd75d9
GS
765 sv = *(SV**)ptr;
766 *(SV**)ptr = value;
767 SvREFCNT_dec(sv);
b9d12d37
GS
768 SvREFCNT_dec(value);
769 break;
8aacddc1 770 case SAVEt_AV: /* array reference */
502c6561 771 av = MUTABLE_AV(SSPOPPTR);
159b6efe 772 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 773 SvREFCNT_dec(GvAV(gv));
8aacddc1 774 GvAV(gv) = av;
fb73857a 775 if (SvMAGICAL(av)) {
3280af22 776 PL_localizing = 2;
ad64d0ec 777 SvSETMAGIC(MUTABLE_SV(av));
3280af22 778 PL_localizing = 0;
fb73857a 779 }
8aacddc1
NIS
780 break;
781 case SAVEt_HV: /* hash reference */
85fbaab2 782 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 783 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 784 SvREFCNT_dec(GvHV(gv));
8aacddc1 785 GvHV(gv) = hv;
fb73857a 786 if (SvMAGICAL(hv)) {
3280af22 787 PL_localizing = 2;
ad64d0ec 788 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 789 PL_localizing = 0;
fb73857a 790 }
8aacddc1 791 break;
79072805
LW
792 case SAVEt_INT: /* int reference */
793 ptr = SSPOPPTR;
794 *(int*)ptr = (int)SSPOPINT;
795 break;
9febdf04
RH
796 case SAVEt_BOOL: /* bool reference */
797 ptr = SSPOPPTR;
f2338a2e 798 *(bool*)ptr = cBOOL(SSPOPBOOL);
9febdf04 799 break;
79072805
LW
800 case SAVEt_I32: /* I32 reference */
801 ptr = SSPOPPTR;
3235b7a3
NC
802#ifdef PERL_DEBUG_READONLY_OPS
803 {
804 const I32 val = SSPOPINT;
805 if (*(I32*)ptr != val)
806 *(I32*)ptr = val;
807 }
808#else
79072805 809 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 810#endif
79072805
LW
811 break;
812 case SAVEt_SPTR: /* SV* reference */
813 ptr = SSPOPPTR;
ad64d0ec 814 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 815 break;
146174a9 816 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
817 case SAVEt_PPTR: /* char* reference */
818 ptr = SSPOPPTR;
819 *(char**)ptr = (char*)SSPOPPTR;
820 break;
79072805
LW
821 case SAVEt_HPTR: /* HV* reference */
822 ptr = SSPOPPTR;
85fbaab2 823 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
824 break;
825 case SAVEt_APTR: /* AV* reference */
826 ptr = SSPOPPTR;
502c6561 827 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 828 break;
fb73857a 829 case SAVEt_GP: /* scalar reference */
159b6efe 830 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 831 gp_free(gv);
b9e00b79
LRG
832 GvGP(gv) = (GP*)SSPOPPTR;
833 if (SSPOPINT)
834 SvFAKE_on(gv);
dd69841b
BB
835 /* putting a method back into circulation ("local")*/
836 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
837 mro_method_changed_in(hv);
4633a7c4 838 SvREFCNT_dec(gv);
8aacddc1 839 break;
8990e307
LW
840 case SAVEt_FREESV:
841 ptr = SSPOPPTR;
ad64d0ec 842 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 843 break;
26d9b02f
JH
844 case SAVEt_MORTALIZESV:
845 ptr = SSPOPPTR;
ad64d0ec 846 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 847 break;
8990e307
LW
848 case SAVEt_FREEOP:
849 ptr = SSPOPPTR;
f3548bdc 850 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
851 op_free((OP*)ptr);
852 break;
853 case SAVEt_FREEPV:
854 ptr = SSPOPPTR;
1df70142 855 Safefree(ptr);
8990e307
LW
856 break;
857 case SAVEt_CLEARSV:
cdcdfc56 858 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 859 sv = *(SV**)ptr;
dd2155a4
DM
860
861 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
862 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
863 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
864 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
865 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
866 ));
867
bc44cdaf
GS
868 /* Can clear pad variable in place? */
869 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
870 /*
871 * if a my variable that was made readonly is going out of
872 * scope, we want to remove the readonlyness so that it can
873 * go out of scope quietly
8aacddc1 874 */
a26e96df 875 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
876 SvREADONLY_off(sv);
877
6fc92669 878 if (SvTHINKFIRST(sv))
840a7b70 879 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
880 if (SvMAGICAL(sv))
881 mg_free(sv);
8990e307
LW
882
883 switch (SvTYPE(sv)) {
884 case SVt_NULL:
885 break;
886 case SVt_PVAV:
502c6561 887 av_clear(MUTABLE_AV(sv));
8990e307
LW
888 break;
889 case SVt_PVHV:
85fbaab2 890 hv_clear(MUTABLE_HV(sv));
8990e307
LW
891 break;
892 case SVt_PVCV:
cea2e8a9 893 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 894 default:
0c34ef67 895 SvOK_off(sv);
8990e307
LW
896 break;
897 }
d9d18af6 898 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
899 }
900 else { /* Someone has a claim on this, so abandon it. */
35a4481c 901 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 902 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
903 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
904 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 905 default: *(SV**)ptr = newSV(0); break;
8990e307 906 }
53868620 907 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
908 /* preserve pad nature, but also mark as not live
909 * for any closure capturing */
2740392c 910 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
911 }
912 break;
913 case SAVEt_DELETE:
914 ptr = SSPOPPTR;
85fbaab2 915 hv = MUTABLE_HV(ptr);
35d4f826 916 i = SSPOPINT;
8990e307 917 ptr = SSPOPPTR;
35d4f826 918 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 919 SvREFCNT_dec(hv);
8aacddc1 920 Safefree(ptr);
8990e307 921 break;
c68ec7a9
VP
922 case SAVEt_ADELETE:
923 ptr = SSPOPPTR;
924 av = MUTABLE_AV(ptr);
925 i = SSPOPINT;
926 (void)av_delete(av, i, G_DISCARD);
927 SvREFCNT_dec(av);
928 break;
146174a9
CB
929 case SAVEt_DESTRUCTOR_X:
930 ptr = SSPOPPTR;
acfe0abc 931 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
932 break;
933 case SAVEt_REGCONTEXT:
e0fa7e2b
NC
934 /* regexp must have croaked */
935 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
936 break;
455ece5e 937 case SAVEt_ALLOC:
161b7d16 938 i = SSPOPINT;
3280af22 939 PL_savestack_ix -= i; /* regexp must have croaked */
a0d0e21e 940 break;
55497cff 941 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 942 i = SSPOPINT;
3280af22 943 PL_stack_sp = PL_stack_base + i;
55497cff 944 break;
ea8d6ae1
DB
945 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
946 i = SSPOPINT;
947 cxstack[i].blk_oldsp = SSPOPINT;
948 break;
161b7d16 949 case SAVEt_AELEM: /* array element */
ad64d0ec 950 value = MUTABLE_SV(SSPOPPTR);
161b7d16 951 i = SSPOPINT;
502c6561 952 av = MUTABLE_AV(SSPOPPTR);
658aef79 953 ptr = av_fetch(av,i,1);
5dd42e15
DM
954 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
955 SvREFCNT_dec(value);
4e4c362e
GS
956 if (ptr) {
957 sv = *(SV**)ptr;
3280af22 958 if (sv && sv != &PL_sv_undef) {
ad64d0ec 959 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 960 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
961 goto restore_sv;
962 }
963 }
964 SvREFCNT_dec(av);
965 SvREFCNT_dec(value);
966 break;
161b7d16 967 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
968 value = MUTABLE_SV(SSPOPPTR);
969 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 970 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 971 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 972 SvREFCNT_dec(sv);
4e4c362e 973 if (ptr) {
35a4481c 974 const SV * const oval = HeVAL((HE*)ptr);
3280af22 975 if (oval && oval != &PL_sv_undef) {
4e4c362e 976 ptr = &HeVAL((HE*)ptr);
ad64d0ec 977 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 978 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 979 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
980 goto restore_sv;
981 }
982 }
983 SvREFCNT_dec(hv);
4e4c362e
GS
984 SvREFCNT_dec(value);
985 break;
462e5cf6 986 case SAVEt_OP:
533c011a 987 PL_op = (OP*)SSPOPPTR;
462e5cf6 988 break;
25eaa213 989 case SAVEt_HINTS:
045ac317 990 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 991 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
992 GvHV(PL_hintgv) = NULL;
993 }
c28fe1ec
NC
994 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
995 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 996 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 997 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 998 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 999 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1000 assert(GvHV(PL_hintgv));
1001 } else if (!GvHV(PL_hintgv)) {
1002 /* Need to add a new one manually, else gv_fetchpv() can
1003 add one in this code:
1004
1005 if (SvTYPE(gv) == SVt_PVGV) {
1006 if (add) {
1007 GvMULTI_on(gv);
1008 gv_init_sv(gv, sv_type);
1009 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1010 require_errno(gv);
1011 }
1012 return gv;
1013 }
1014
1015 and it won't have the magic set. */
1016
1017 HV *const hv = newHV();
1018 hv_magic(hv, NULL, PERL_MAGIC_hints);
1019 GvHV(PL_hintgv) = hv;
dfa41748 1020 }
5b9c0671 1021 assert(GvHV(PL_hintgv));
b3ac6de7 1022 break;
cb50131a 1023 case SAVEt_COMPPAD:
f3548bdc 1024 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1025 if (PL_comppad)
cb50131a
CB
1026 PL_curpad = AvARRAY(PL_comppad);
1027 else
4608196e 1028 PL_curpad = NULL;
cb50131a 1029 break;
09edbca0 1030 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1031 {
35a4481c 1032 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1033 SV **svp;
c3564e5c 1034 ptr = SSPOPPTR;
09edbca0
NC
1035 assert (ptr);
1036 svp = AvARRAY((PAD*)ptr) + off;
1037 /* This mortalizing used to be done by POPLOOP() via itersave.
1038 But as we have all the information here, we can do it here,
1039 save even having to have itersave in the struct. */
1040 sv_2mortal(*svp);
ad64d0ec 1041 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1042 }
1043 break;
8b7059b1
DM
1044 case SAVEt_SAVESWITCHSTACK:
1045 {
1046 dSP;
502c6561
NC
1047 AV *const t = MUTABLE_AV(SSPOPPTR);
1048 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1049 SWITCHSTACK(t,f);
1050 PL_curstackinfo->si_stack = f;
1051 }
1052 break;
14f338dc
DM
1053 case SAVEt_SET_SVFLAGS:
1054 {
35a4481c
AL
1055 const U32 val = (U32)SSPOPINT;
1056 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1057 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1058 SvFLAGS(sv) &= ~mask;
1059 SvFLAGS(sv) |= val;
1060 }
1061 break;
95e06916
NC
1062
1063 /* This would be a mathom, but Perl_save_svref() calls a static
1064 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1065 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1066 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1067 ptr = SSPOPPTR;
1068 av = NULL; /* what to refcnt_dec */
1069 goto restore_sv;
95e06916
NC
1070
1071 /* These are only saved in mathoms.c */
1072 case SAVEt_NSTAB:
159b6efe 1073 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1074 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1075 break;
2053acbf
NC
1076 case SAVEt_LONG: /* long reference */
1077 ptr = SSPOPPTR;
1078 *(long*)ptr = (long)SSPOPLONG;
1079 break;
95e06916
NC
1080 case SAVEt_IV: /* IV reference */
1081 ptr = SSPOPPTR;
1082 *(IV*)ptr = (IV)SSPOPIV;
1083 break;
1084
2053acbf
NC
1085 case SAVEt_I16: /* I16 reference */
1086 ptr = SSPOPPTR;
1087 *(I16*)ptr = (I16)SSPOPINT;
1088 break;
1089 case SAVEt_I8: /* I8 reference */
1090 ptr = SSPOPPTR;
1091 *(I8*)ptr = (I8)SSPOPINT;
1092 break;
2053acbf
NC
1093 case SAVEt_DESTRUCTOR:
1094 ptr = SSPOPPTR;
1095 (*SSPOPDPTR)(ptr);
1096 break;
fc15ae8f
NC
1097 case SAVEt_COP_ARYBASE:
1098 ptr = SSPOPPTR;
1099 i = SSPOPINT;
1100 CopARYBASE_set((COP *)ptr, i);
1101 break;
68da3b2f
NC
1102 case SAVEt_COMPILE_WARNINGS:
1103 ptr = SSPOPPTR;
72dc9ed5 1104
68da3b2f
NC
1105 if (!specialWARN(PL_compiling.cop_warnings))
1106 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1107
10edeb5d 1108 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1109 break;
1ade1aa1
NC
1110 case SAVEt_RE_STATE:
1111 {
1112 const struct re_save_state *const state
1113 = (struct re_save_state *)
1114 (PL_savestack + PL_savestack_ix
1115 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1116 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1117
1ade1aa1
NC
1118 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1119 Safefree(PL_reg_start_tmp);
1ade1aa1 1120 }
1ade1aa1
NC
1121 if (PL_reg_poscache != state->re_state_reg_poscache) {
1122 Safefree(PL_reg_poscache);
1ade1aa1 1123 }
46ab3289 1124 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1125 }
1126 break;
7c197c94
DM
1127 case SAVEt_PARSER:
1128 ptr = SSPOPPTR;
1129 parser_free((yy_parser *) ptr);
1130 break;
79072805 1131 default:
cea2e8a9 1132 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1133 }
1134 }
302c0c93
NC
1135
1136 PL_tainted = was;
f410a211
NC
1137
1138 PERL_ASYNC_CHECK();
79072805 1139}
8990e307 1140
8990e307 1141void
864dbfa3 1142Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1143{
97aff369 1144 dVAR;
7918f24d
NC
1145
1146 PERL_ARGS_ASSERT_CX_DUMP;
1147
35ff7856 1148#ifdef DEBUGGING
22c35a8c 1149 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1150 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1151 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1152 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1153 PTR2UV(cx->blk_oldcop));
760ac839
LW
1154 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1155 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1156 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1157 PTR2UV(cx->blk_oldpm));
760ac839 1158 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1159 }
6b35e009 1160 switch (CxTYPE(cx)) {
8990e307
LW
1161 case CXt_NULL:
1162 case CXt_BLOCK:
1163 break;
146174a9 1164 case CXt_FORMAT:
f9c764c5
NC
1165 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1166 PTR2UV(cx->blk_format.cv));
1167 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1168 PTR2UV(cx->blk_format.gv));
1169 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1170 PTR2UV(cx->blk_format.dfoutgv));
1171 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1172 (int)CxHASARGS(cx));
f9c764c5
NC
1173 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1174 PTR2UV(cx->blk_format.retop));
146174a9 1175 break;
8990e307 1176 case CXt_SUB:
146174a9
CB
1177 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1178 PTR2UV(cx->blk_sub.cv));
760ac839 1179 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1180 (long)cx->blk_sub.olddepth);
760ac839 1181 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1182 (int)CxHASARGS(cx));
1183 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1184 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1185 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1186 break;
1187 case CXt_EVAL:
760ac839 1188 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1189 (long)CxOLD_IN_EVAL(cx));
760ac839 1190 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1191 PL_op_name[CxOLD_OP_TYPE(cx)],
1192 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1193 if (cx->blk_eval.old_namesv)
1194 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1195 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1196 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1197 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1198 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1200 break;
1201
c6fdafd0 1202 case CXt_LOOP_LAZYIV:
d01136d6 1203 case CXt_LOOP_LAZYSV:
3b719c58
NC
1204 case CXt_LOOP_FOR:
1205 case CXt_LOOP_PLAIN:
0cbdab38 1206 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1207 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1208 (long)cx->blk_loop.resetsp);
022eaa24
NC
1209 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1210 PTR2UV(cx->blk_loop.my_op));
146174a9 1211 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
022eaa24 1212 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
d01136d6 1213 /* XXX: not accurate for LAZYSV/IV */
146174a9 1214 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1215 PTR2UV(cx->blk_loop.state_u.ary.ary));
1216 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1217 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1218 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1219 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1220 break;
1221
1222 case CXt_SUBST:
760ac839 1223 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1224 (long)cx->sb_iters);
760ac839 1225 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1226 (long)cx->sb_maxiters);
35ef4773
GS
1227 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1228 (long)cx->sb_rflags);
760ac839 1229 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1230 (long)CxONCE(cx));
760ac839 1231 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1232 cx->sb_orig);
146174a9
CB
1233 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1234 PTR2UV(cx->sb_dstr));
1235 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1236 PTR2UV(cx->sb_targ));
1237 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1238 PTR2UV(cx->sb_s));
1239 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1240 PTR2UV(cx->sb_m));
1241 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1242 PTR2UV(cx->sb_strend));
1243 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1244 PTR2UV(cx->sb_rxres));
8990e307
LW
1245 break;
1246 }
65e66c80 1247#else
96a5add6 1248 PERL_UNUSED_CONTEXT;
65e66c80 1249 PERL_UNUSED_ARG(cx);
17c3b450 1250#endif /* DEBUGGING */
35ff7856 1251}
241d1a3b
NC
1252
1253/*
1254 * Local variables:
1255 * c-indentation-style: bsd
1256 * c-basic-offset: 4
1257 * indent-tabs-mode: t
1258 * End:
1259 *
37442d52
RGS
1260 * ex: set ts=8 sts=4 sw=4 noet:
1261 */