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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);
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);
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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;
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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;
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
10507e11 284 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 285
5f05dabc 286 if (empty) {
12816592 287 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 288
fae75791 289 if (GvCVu(gv))
e1a479c5 290 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
291 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
292 gp->gp_io = newIO();
293 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
294 }
72651472
NC
295#ifdef PERL_DONT_CREATE_GVSV
296 if (gv == PL_errgv) {
297 /* We could scatter this logic everywhere by changing the
298 definition of ERRSV from GvSV() to GvSVn(), but it seems more
299 efficient to do this check once here. */
300 gp->gp_sv = newSV(0);
301 }
302#endif
c43ae56f 303 GvGP_set(gv,gp);
5f05dabc
PP
304 }
305 else {
44a8e56a 306 gp_ref(GvGP(gv));
5f05dabc
PP
307 GvINTRO_on(gv);
308 }
79072805 309}
79072805 310
79072805 311AV *
864dbfa3 312Perl_save_ary(pTHX_ GV *gv)
79072805 313{
97aff369 314 dVAR;
901017d6 315 AV * const oav = GvAVn(gv);
67a38de0 316 AV *av;
fb73857a 317
7918f24d
NC
318 PERL_ARGS_ASSERT_SAVE_ARY;
319
67a38de0
NIS
320 if (!AvREAL(oav) && AvREIFY(oav))
321 av_reify(oav);
01433346 322 save_pushptrptr(SvREFCNT_inc_simple_NN(gv), oav, SAVEt_AV);
79072805 323
4608196e 324 GvAV(gv) = NULL;
fb73857a 325 av = GvAVn(gv);
0cbee0a4 326 if (SvMAGIC(oav))
9711599e 327 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 328 return av;
79072805
LW
329}
330
331HV *
864dbfa3 332Perl_save_hash(pTHX_ GV *gv)
79072805 333{
97aff369 334 dVAR;
fb73857a
PP
335 HV *ohv, *hv;
336
7918f24d
NC
337 PERL_ARGS_ASSERT_SAVE_HASH;
338
01433346
FC
339 save_pushptrptr(
340 SvREFCNT_inc_simple_NN(gv), (ohv = GvHVn(gv)), SAVEt_HV
341 );
79072805 342
4608196e 343 GvHV(gv) = NULL;
fb73857a 344 hv = GvHVn(gv);
0cbee0a4 345 if (SvMAGIC(ohv))
9711599e 346 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 347 return hv;
79072805
LW
348}
349
350void
864dbfa3 351Perl_save_item(pTHX_ register SV *item)
79072805 352{
97aff369 353 dVAR;
eb578fdb 354 SV * const sv = newSVsv(item);
79072805 355
7918f24d
NC
356 PERL_ARGS_ASSERT_SAVE_ITEM;
357
e22024d3
NC
358 save_pushptrptr(item, /* remember the pointer */
359 sv, /* remember the value */
360 SAVEt_ITEM);
79072805
LW
361}
362
363void
1409bc06 364Perl_save_bool(pTHX_ bool *boolp)
79072805 365{
97aff369 366 dVAR;
7918f24d 367
1409bc06 368 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 369
65504245 370 SSCHECK(2);
1409bc06 371 SSPUSHPTR(boolp);
65504245 372 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
373}
374
7623d426
NC
375void
376Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
377{
378 dVAR;
379 SSCHECK(3);
380 SSPUSHINT(i);
381 SSPUSHPTR(ptr);
c6bf6a65 382 SSPUSHUV(type);
79072805
LW
383}
384
385void
1409bc06 386Perl_save_int(pTHX_ int *intp)
9febdf04 387{
97aff369 388 dVAR;
994d373a 389 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 390
1409bc06 391 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 392
994d373a
NC
393 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
394 SSCHECK(2);
395 SSPUSHPTR(intp);
396 SSPUSHUV(SAVEt_INT_SMALL | shifted);
397 } else
398 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
399}
400
401void
58188858
RGS
402Perl_save_I8(pTHX_ I8 *bytep)
403{
404 dVAR;
7918f24d
NC
405
406 PERL_ARGS_ASSERT_SAVE_I8;
407
6c61c2d4
NC
408 SSCHECK(2);
409 SSPUSHPTR(bytep);
410 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
411}
412
413void
87a84751
JH
414Perl_save_I16(pTHX_ I16 *intp)
415{
416 dVAR;
7918f24d
NC
417
418 PERL_ARGS_ASSERT_SAVE_I16;
419
c9441fce
NC
420 SSCHECK(2);
421 SSPUSHPTR(intp);
422 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
423}
424
425void
864dbfa3 426Perl_save_I32(pTHX_ I32 *intp)
79072805 427{
97aff369 428 dVAR;
89abef21 429 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
430
431 PERL_ARGS_ASSERT_SAVE_I32;
432
89abef21
NC
433 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
434 SSCHECK(2);
435 SSPUSHPTR(intp);
436 SSPUSHUV(SAVEt_I32_SMALL | shifted);
437 } else
438 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
439}
440
85e6fe83
LW
441/* Cannot use save_sptr() to store a char* since the SV** cast will
442 * force word-alignment and we'll miss the pointer.
443 */
444void
864dbfa3 445Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 446{
97aff369 447 dVAR;
7918f24d
NC
448
449 PERL_ARGS_ASSERT_SAVE_PPTR;
450
e22024d3 451 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
452}
453
79072805 454void
146174a9
CB
455Perl_save_vptr(pTHX_ void *ptr)
456{
97aff369 457 dVAR;
7918f24d
NC
458
459 PERL_ARGS_ASSERT_SAVE_VPTR;
460
e22024d3 461 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
462}
463
464void
864dbfa3 465Perl_save_sptr(pTHX_ SV **sptr)
79072805 466{
97aff369 467 dVAR;
7918f24d
NC
468
469 PERL_ARGS_ASSERT_SAVE_SPTR;
470
e22024d3 471 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
472}
473
c3564e5c 474void
09edbca0 475Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 476{
97aff369 477 dVAR;
c3564e5c 478 SSCHECK(4);
f3548bdc 479 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 480 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 481 SSPUSHPTR(PL_comppad);
c3564e5c 482 SSPUSHLONG((long)off);
c6bf6a65 483 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
484}
485
79072805 486void
864dbfa3 487Perl_save_hptr(pTHX_ HV **hptr)
79072805 488{
97aff369 489 dVAR;
7918f24d
NC
490
491 PERL_ARGS_ASSERT_SAVE_HPTR;
492
e22024d3 493 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
494}
495
496void
864dbfa3 497Perl_save_aptr(pTHX_ AV **aptr)
79072805 498{
97aff369 499 dVAR;
7918f24d
NC
500
501 PERL_ARGS_ASSERT_SAVE_APTR;
502
e22024d3 503 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
504}
505
506void
2fd8beea 507Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 508{
97aff369 509 dVAR;
8990e307 510 SSCHECK(2);
2fd8beea 511 SSPUSHPTR(ptr);
c6bf6a65 512 SSPUSHUV(type);
8990e307
LW
513}
514
515void
864dbfa3 516Perl_save_clearsv(pTHX_ SV **svp)
8990e307 517{
97aff369 518 dVAR;
cdcdfc56
NC
519 const UV offset = svp - PL_curpad;
520 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
521
522 PERL_ARGS_ASSERT_SAVE_CLEARSV;
523
f3548bdc 524 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
525 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
526 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
527 offset, svp, PL_curpad);
528
529 SSCHECK(1);
530 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 531 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
532}
533
534void
864dbfa3 535Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 536{
97aff369 537 dVAR;
7918f24d
NC
538
539 PERL_ARGS_ASSERT_SAVE_DELETE;
540
85a721ca 541 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
542}
543
544void
af097752
VP
545Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
546{
547 STRLEN len;
548 I32 klen;
549 const char *key;
550
551 PERL_ARGS_ASSERT_SAVE_HDELETE;
552
553 key = SvPV_const(keysv, len);
554 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
555 SvREFCNT_inc_simple_void_NN(hv);
556 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
557}
558
559void
c68ec7a9
VP
560Perl_save_adelete(pTHX_ AV *av, I32 key)
561{
562 dVAR;
563
564 PERL_ARGS_ASSERT_SAVE_ADELETE;
565
566 SvREFCNT_inc_void(av);
567 save_pushi32ptr(key, av, SAVEt_ADELETE);
568}
569
570void
12ab1f58
JH
571Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
572{
573 dVAR;
7918f24d
NC
574
575 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
576
12ab1f58
JH
577 SSCHECK(3);
578 SSPUSHDPTR(f);
579 SSPUSHPTR(p);
c6bf6a65 580 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
581}
582
583void
146174a9
CB
584Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
585{
97aff369 586 dVAR;
146174a9
CB
587 SSCHECK(3);
588 SSPUSHDXPTR(f);
589 SSPUSHPTR(p);
c6bf6a65 590 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
591}
592
593void
da8315f8
NC
594Perl_save_hints(pTHX)
595{
596 dVAR;
20439bc7 597 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 598 if (PL_hints & HINT_LOCALIZE_HH) {
52c7aca6
FC
599 HV *oldhh = GvHV(PL_hintgv);
600 save_pushptri32ptr(oldhh, PL_hints, save_cophh, SAVEt_HINTS);
601 GvHV(PL_hintgv) = NULL; /* in case copying dies */
602 GvHV(PL_hintgv) = hv_copy_hints_hv(oldhh);
be84297e 603 } else {
20439bc7 604 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 605 }
be84297e
NC
606}
607
608static void
609S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
610 const int type)
611{
612 SSCHECK(4);
613 SSPUSHPTR(ptr1);
614 SSPUSHINT(i);
615 SSPUSHPTR(ptr2);
c6bf6a65 616 SSPUSHUV(type);
da8315f8
NC
617}
618
619void
91d1c79f 620Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 621{
97aff369 622 dVAR;
bfc4de9f 623 SV *sv;
7918f24d 624
91d1c79f 625 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 626
0cbee0a4 627 SvGETMAGIC(*sptr);
be84297e
NC
628 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
629 SAVEt_AELEM);
5dd42e15
DM
630 /* if it gets reified later, the restore will have the wrong refcnt */
631 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 632 SvREFCNT_inc_void(*sptr);
91d1c79f 633 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
634 if (flags & SAVEf_KEEPOLDELEM)
635 return;
bfc4de9f
DM
636 sv = *sptr;
637 /* If we're localizing a tied array element, this new sv
638 * won't actually be stored in the array - so it won't get
639 * reaped when the localize ends. Ensure it gets reaped by
640 * mortifying it instead. DAPM */
daeb922a 641 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 642 sv_2mortal(sv);
4e4c362e
GS
643}
644
645void
af7df257 646Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 647{
97aff369 648 dVAR;
bfc4de9f 649 SV *sv;
7918f24d 650
af7df257 651 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 652
0cbee0a4 653 SvGETMAGIC(*sptr);
4e4c362e 654 SSCHECK(4);
b37c2d43 655 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 656 SSPUSHPTR(newSVsv(key));
4e4c362e 657 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 658 SSPUSHUV(SAVEt_HELEM);
af7df257 659 save_scalar_at(sptr, flags);
75d34a09
VP
660 if (flags & SAVEf_KEEPOLDELEM)
661 return;
bfc4de9f
DM
662 sv = *sptr;
663 /* If we're localizing a tied hash element, this new sv
664 * won't actually be stored in the hash - so it won't get
665 * reaped when the localize ends. Ensure it gets reaped by
666 * mortifying it instead. DAPM */
daeb922a 667 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 668 sv_2mortal(sv);
4e4c362e
GS
669}
670
2053acbf
NC
671SV*
672Perl_save_svref(pTHX_ SV **sptr)
673{
674 dVAR;
7918f24d
NC
675
676 PERL_ARGS_ASSERT_SAVE_SVREF;
677
2053acbf 678 SvGETMAGIC(*sptr);
e22024d3 679 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 680 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
681}
682
455ece5e 683I32
864dbfa3 684Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 685{
97aff369 686 dVAR;
eb578fdb
KW
687 const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
688 - (char*)PL_savestack);
1be36ce0
NC
689 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
690 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 691
1be36ce0
NC
692 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
693 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
694 elems, size, pad);
695
696 SSGROW(elems + 1);
455ece5e
AD
697
698 PL_savestack_ix += elems;
1be36ce0 699 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
700 return start;
701}
702
462e5cf6 703void
864dbfa3 704Perl_leave_scope(pTHX_ I32 base)
79072805 705{
97aff369 706 dVAR;
eb578fdb
KW
707 SV *sv;
708 SV *value;
709 GV *gv;
710 AV *av;
711 HV *hv;
20454177 712 void* ptr;
eb578fdb 713 char* str;
161b7d16 714 I32 i;
302c0c93 715 /* Localise the effects of the TAINT_NOT inside the loop. */
284167a5 716 bool was = TAINT_get;
79072805
LW
717
718 if (base < -1)
5637ef5b 719 Perl_croak(aTHX_ "panic: corrupt saved stack index %ld", (long) base);
1c98cc53
DM
720 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
721 (long)PL_savestack_ix, (long)base));
3280af22 722 while (PL_savestack_ix > base) {
c6bf6a65
NC
723 UV uv = SSPOPUV;
724 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
725 TAINT_NOT;
726
c6bf6a65 727 switch (type) {
79072805 728 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
729 value = MUTABLE_SV(SSPOPPTR);
730 sv = MUTABLE_SV(SSPOPPTR);
79072805 731 sv_replace(sv,value);
3280af22 732 PL_localizing = 2;
79072805 733 SvSETMAGIC(sv);
3280af22 734 PL_localizing = 0;
79072805 735 break;
8aacddc1 736 case SAVEt_SV: /* scalar reference */
ad64d0ec 737 value = MUTABLE_SV(SSPOPPTR);
159b6efe 738 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 739 ptr = &GvSV(gv);
502c6561 740 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
741 restore_sv:
742 sv = *(SV**)ptr;
2053acbf
NC
743 *(SV**)ptr = value;
744 SvREFCNT_dec(sv);
745 PL_localizing = 2;
746 SvSETMAGIC(value);
747 PL_localizing = 0;
748 SvREFCNT_dec(value);
9bfbb681 749 SvREFCNT_dec(av); /* av may actually be an AV, HV or GV */
2053acbf 750 break;
8aacddc1 751 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 752 ptr = SSPOPPTR;
b03d03b0 753 str = (char*)SSPOPPTR;
f4dd75d9
GS
754 if (*(char**)ptr != str) {
755 Safefree(*(char**)ptr);
756 *(char**)ptr = str;
757 }
758 break;
05ec9bb3
NIS
759 case SAVEt_SHARED_PVREF: /* shared pv */
760 str = (char*)SSPOPPTR;
761 ptr = SSPOPPTR;
762 if (*(char**)ptr != str) {
5e54c26f 763#ifdef NETWARE
9ecbcc42 764 PerlMem_free(*(char**)ptr);
5e54c26f 765#else
05ec9bb3 766 PerlMemShared_free(*(char**)ptr);
5e54c26f 767#endif
05ec9bb3
NIS
768 *(char**)ptr = str;
769 }
770 break;
f83b46a0
DM
771 case SAVEt_GVSV: /* scalar slot in GV */
772 value = MUTABLE_SV(SSPOPPTR);
773 gv = MUTABLE_GV(SSPOPPTR);
774 ptr = &GvSV(gv);
775 goto restore_svp;
8aacddc1 776 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 777 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 778 ptr = SSPOPPTR;
f83b46a0 779 restore_svp:
f4dd75d9
GS
780 sv = *(SV**)ptr;
781 *(SV**)ptr = value;
782 SvREFCNT_dec(sv);
b9d12d37
GS
783 SvREFCNT_dec(value);
784 break;
8aacddc1 785 case SAVEt_AV: /* array reference */
502c6561 786 av = MUTABLE_AV(SSPOPPTR);
159b6efe 787 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 788 SvREFCNT_dec(GvAV(gv));
8aacddc1 789 GvAV(gv) = av;
fb73857a 790 if (SvMAGICAL(av)) {
3280af22 791 PL_localizing = 2;
ad64d0ec 792 SvSETMAGIC(MUTABLE_SV(av));
3280af22 793 PL_localizing = 0;
fb73857a 794 }
01433346 795 SvREFCNT_dec(gv);
8aacddc1
NIS
796 break;
797 case SAVEt_HV: /* hash reference */
85fbaab2 798 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 799 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 800 SvREFCNT_dec(GvHV(gv));
8aacddc1 801 GvHV(gv) = hv;
fb73857a 802 if (SvMAGICAL(hv)) {
3280af22 803 PL_localizing = 2;
ad64d0ec 804 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 805 PL_localizing = 0;
fb73857a 806 }
01433346 807 SvREFCNT_dec(gv);
8aacddc1 808 break;
994d373a
NC
809 case SAVEt_INT_SMALL:
810 ptr = SSPOPPTR;
811 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
812 break;
79072805
LW
813 case SAVEt_INT: /* int reference */
814 ptr = SSPOPPTR;
815 *(int*)ptr = (int)SSPOPINT;
816 break;
9febdf04
RH
817 case SAVEt_BOOL: /* bool reference */
818 ptr = SSPOPPTR;
65504245 819 *(bool*)ptr = cBOOL(uv >> 8);
284167a5 820#if !NO_TAINT_SUPPORT
173c3f27 821 if (ptr == &(TAINT_get)) {
b6f93e7a
KW
822 /* If we don't update <was>, to reflect what was saved on the
823 * stack for PL_tainted, then we will overwrite this attempt to
824 * restore it when we exit this routine. Note that this won't
825 * work if this value was saved in a wider-than necessary type,
826 * such as I32 */
827 was = *(bool*)ptr;
828 }
284167a5 829#endif
9febdf04 830 break;
89abef21
NC
831 case SAVEt_I32_SMALL:
832 ptr = SSPOPPTR;
833 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
834 break;
79072805
LW
835 case SAVEt_I32: /* I32 reference */
836 ptr = SSPOPPTR;
3235b7a3
NC
837#ifdef PERL_DEBUG_READONLY_OPS
838 {
839 const I32 val = SSPOPINT;
840 if (*(I32*)ptr != val)
841 *(I32*)ptr = val;
842 }
843#else
79072805 844 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 845#endif
79072805
LW
846 break;
847 case SAVEt_SPTR: /* SV* reference */
848 ptr = SSPOPPTR;
ad64d0ec 849 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 850 break;
146174a9 851 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
852 case SAVEt_PPTR: /* char* reference */
853 ptr = SSPOPPTR;
854 *(char**)ptr = (char*)SSPOPPTR;
855 break;
79072805
LW
856 case SAVEt_HPTR: /* HV* reference */
857 ptr = SSPOPPTR;
85fbaab2 858 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
859 break;
860 case SAVEt_APTR: /* AV* reference */
861 ptr = SSPOPPTR;
502c6561 862 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 863 break;
fb73857a 864 case SAVEt_GP: /* scalar reference */
10507e11 865 ptr = SSPOPPTR;
159b6efe 866 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 867 gp_free(gv);
c43ae56f 868 GvGP_set(gv, (GP*)ptr);
dd69841b 869 /* putting a method back into circulation ("local")*/
00169e2c 870 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvENAME_get(hv))
dd69841b 871 mro_method_changed_in(hv);
4633a7c4 872 SvREFCNT_dec(gv);
8aacddc1 873 break;
8990e307
LW
874 case SAVEt_FREESV:
875 ptr = SSPOPPTR;
ad64d0ec 876 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 877 break;
3987a177
Z
878 case SAVEt_FREECOPHH:
879 ptr = SSPOPPTR;
880 cophh_free((COPHH *)ptr);
881 break;
26d9b02f
JH
882 case SAVEt_MORTALIZESV:
883 ptr = SSPOPPTR;
ad64d0ec 884 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 885 break;
8990e307
LW
886 case SAVEt_FREEOP:
887 ptr = SSPOPPTR;
f3548bdc 888 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
889 op_free((OP*)ptr);
890 break;
891 case SAVEt_FREEPV:
892 ptr = SSPOPPTR;
1df70142 893 Safefree(ptr);
8990e307
LW
894 break;
895 case SAVEt_CLEARSV:
cdcdfc56 896 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 897 sv = *(SV**)ptr;
dd2155a4
DM
898
899 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
900 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
901 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
902 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
903 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
904 ));
905
bc44cdaf
GS
906 /* Can clear pad variable in place? */
907 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
908 /*
909 * if a my variable that was made readonly is going out of
910 * scope, we want to remove the readonlyness so that it can
911 * go out of scope quietly
8aacddc1 912 */
a26e96df 913 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
914 SvREADONLY_off(sv);
915
6fc92669 916 if (SvTHINKFIRST(sv))
a6d7a4ac
FC
917 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF
918 |SV_COW_DROP_PV);
9c3f0156
FC
919 if (SvTYPE(sv) == SVt_PVHV)
920 Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv));
a0d0e21e 921 if (SvMAGICAL(sv))
6d5c2147
FC
922 {
923 sv_unmagic(sv, PERL_MAGIC_backref);
924 if (SvTYPE(sv) != SVt_PVCV)
a0d0e21e 925 mg_free(sv);
6d5c2147 926 }
8990e307
LW
927
928 switch (SvTYPE(sv)) {
929 case SVt_NULL:
930 break;
931 case SVt_PVAV:
502c6561 932 av_clear(MUTABLE_AV(sv));
8990e307
LW
933 break;
934 case SVt_PVHV:
85fbaab2 935 hv_clear(MUTABLE_HV(sv));
8990e307
LW
936 break;
937 case SVt_PVCV:
6d5c2147
FC
938 {
939 HEK * const hek = CvNAME_HEK((CV *)sv);
940 assert(hek);
941 share_hek_hek(hek);
942 cv_undef((CV *)sv);
2e800d79 943 CvNAME_HEK_set(sv, hek);
6d5c2147
FC
944 break;
945 }
8990e307 946 default:
0c34ef67 947 SvOK_off(sv);
8990e307
LW
948 break;
949 }
d9d18af6 950 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
951 }
952 else { /* Someone has a claim on this, so abandon it. */
9a214eec
DM
953 assert( SvFLAGS(sv) & SVs_PADMY);
954 assert(!(SvFLAGS(sv) & SVs_PADTMP));
8990e307 955 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
956 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
957 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
6d5c2147
FC
958 case SVt_PVCV:
959 {
960 SV ** const svp = (SV **)ptr;
6d5c2147
FC
961
962 /* Create a stub */
963 *svp = newSV_type(SVt_PVCV);
964
965 /* Share name */
966 assert(CvNAMED(sv));
2e800d79
FC
967 CvNAME_HEK_set(*svp,
968 share_hek_hek(CvNAME_HEK((CV *)sv)));
6d5c2147
FC
969 break;
970 }
561b68a9 971 default: *(SV**)ptr = newSV(0); break;
8990e307 972 }
53868620 973 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
974 /* preserve pad nature, but also mark as not live
975 * for any closure capturing */
9a214eec 976 SvFLAGS(*(SV**)ptr) |= (SVs_PADMY|SVs_PADSTALE);
8990e307
LW
977 }
978 break;
979 case SAVEt_DELETE:
980 ptr = SSPOPPTR;
85fbaab2 981 hv = MUTABLE_HV(ptr);
35d4f826 982 i = SSPOPINT;
8990e307 983 ptr = SSPOPPTR;
35d4f826 984 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 985 SvREFCNT_dec(hv);
8aacddc1 986 Safefree(ptr);
8990e307 987 break;
c68ec7a9
VP
988 case SAVEt_ADELETE:
989 ptr = SSPOPPTR;
990 av = MUTABLE_AV(ptr);
991 i = SSPOPINT;
992 (void)av_delete(av, i, G_DISCARD);
993 SvREFCNT_dec(av);
994 break;
146174a9
CB
995 case SAVEt_DESTRUCTOR_X:
996 ptr = SSPOPPTR;
acfe0abc 997 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
998 break;
999 case SAVEt_REGCONTEXT:
e0fa7e2b 1000 /* regexp must have croaked */
455ece5e 1001 case SAVEt_ALLOC:
1be36ce0 1002 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 1003 break;
55497cff 1004 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 1005 i = SSPOPINT;
3280af22 1006 PL_stack_sp = PL_stack_base + i;
55497cff 1007 break;
ea8d6ae1
DB
1008 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
1009 i = SSPOPINT;
1010 cxstack[i].blk_oldsp = SSPOPINT;
1011 break;
161b7d16 1012 case SAVEt_AELEM: /* array element */
ad64d0ec 1013 value = MUTABLE_SV(SSPOPPTR);
161b7d16 1014 i = SSPOPINT;
502c6561 1015 av = MUTABLE_AV(SSPOPPTR);
658aef79 1016 ptr = av_fetch(av,i,1);
5dd42e15
DM
1017 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
1018 SvREFCNT_dec(value);
4e4c362e
GS
1019 if (ptr) {
1020 sv = *(SV**)ptr;
3280af22 1021 if (sv && sv != &PL_sv_undef) {
ad64d0ec 1022 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 1023 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
1024 goto restore_sv;
1025 }
1026 }
1027 SvREFCNT_dec(av);
1028 SvREFCNT_dec(value);
1029 break;
161b7d16 1030 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
1031 value = MUTABLE_SV(SSPOPPTR);
1032 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 1033 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 1034 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 1035 SvREFCNT_dec(sv);
4e4c362e 1036 if (ptr) {
35a4481c 1037 const SV * const oval = HeVAL((HE*)ptr);
3280af22 1038 if (oval && oval != &PL_sv_undef) {
4e4c362e 1039 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1040 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1041 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1042 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1043 goto restore_sv;
1044 }
1045 }
1046 SvREFCNT_dec(hv);
4e4c362e
GS
1047 SvREFCNT_dec(value);
1048 break;
462e5cf6 1049 case SAVEt_OP:
533c011a 1050 PL_op = (OP*)SSPOPPTR;
462e5cf6 1051 break;
25eaa213 1052 case SAVEt_HINTS:
3607ca02
FC
1053 if ((PL_hints & HINT_LOCALIZE_HH)) {
1054 while (GvHV(PL_hintgv)) {
2653c1e3 1055 HV *hv = GvHV(PL_hintgv);
045ac317 1056 GvHV(PL_hintgv) = NULL;
2653c1e3 1057 SvREFCNT_dec(MUTABLE_SV(hv));
3607ca02 1058 }
045ac317 1059 }
20439bc7
Z
1060 cophh_free(CopHINTHASH_get(&PL_compiling));
1061 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1062 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1063 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1064 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1065 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
2653c1e3
DM
1066 }
1067 if (!GvHV(PL_hintgv)) {
a3fb8386
FC
1068 /* Need to add a new one manually, else rv2hv can
1069 add one via GvHVn and it won't have the magic set. */
5b9c0671
NC
1070 HV *const hv = newHV();
1071 hv_magic(hv, NULL, PERL_MAGIC_hints);
1072 GvHV(PL_hintgv) = hv;
dfa41748 1073 }
5b9c0671 1074 assert(GvHV(PL_hintgv));
b3ac6de7 1075 break;
cb50131a 1076 case SAVEt_COMPPAD:
f3548bdc 1077 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1078 if (PL_comppad)
cb50131a
CB
1079 PL_curpad = AvARRAY(PL_comppad);
1080 else
4608196e 1081 PL_curpad = NULL;
cb50131a 1082 break;
09edbca0 1083 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1084 {
35a4481c 1085 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1086 SV **svp;
c3564e5c 1087 ptr = SSPOPPTR;
09edbca0
NC
1088 assert (ptr);
1089 svp = AvARRAY((PAD*)ptr) + off;
1090 /* This mortalizing used to be done by POPLOOP() via itersave.
1091 But as we have all the information here, we can do it here,
1092 save even having to have itersave in the struct. */
1093 sv_2mortal(*svp);
ad64d0ec 1094 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1095 }
1096 break;
8b7059b1
DM
1097 case SAVEt_SAVESWITCHSTACK:
1098 {
1099 dSP;
502c6561
NC
1100 AV *const t = MUTABLE_AV(SSPOPPTR);
1101 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1102 SWITCHSTACK(t,f);
1103 PL_curstackinfo->si_stack = f;
1104 }
1105 break;
14f338dc
DM
1106 case SAVEt_SET_SVFLAGS:
1107 {
35a4481c
AL
1108 const U32 val = (U32)SSPOPINT;
1109 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1110 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1111 SvFLAGS(sv) &= ~mask;
1112 SvFLAGS(sv) |= val;
1113 }
1114 break;
95e06916
NC
1115
1116 /* This would be a mathom, but Perl_save_svref() calls a static
1117 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1118 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1119 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1120 ptr = SSPOPPTR;
1121 av = NULL; /* what to refcnt_dec */
1122 goto restore_sv;
95e06916
NC
1123
1124 /* These are only saved in mathoms.c */
1125 case SAVEt_NSTAB:
159b6efe 1126 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1127 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1128 break;
2053acbf
NC
1129 case SAVEt_LONG: /* long reference */
1130 ptr = SSPOPPTR;
1131 *(long*)ptr = (long)SSPOPLONG;
1132 break;
95e06916
NC
1133 case SAVEt_IV: /* IV reference */
1134 ptr = SSPOPPTR;
1135 *(IV*)ptr = (IV)SSPOPIV;
1136 break;
1137
2053acbf
NC
1138 case SAVEt_I16: /* I16 reference */
1139 ptr = SSPOPPTR;
c9441fce 1140 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1141 break;
1142 case SAVEt_I8: /* I8 reference */
1143 ptr = SSPOPPTR;
6c61c2d4 1144 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1145 break;
2053acbf
NC
1146 case SAVEt_DESTRUCTOR:
1147 ptr = SSPOPPTR;
1148 (*SSPOPDPTR)(ptr);
1149 break;
68da3b2f
NC
1150 case SAVEt_COMPILE_WARNINGS:
1151 ptr = SSPOPPTR;
72dc9ed5 1152
68da3b2f
NC
1153 if (!specialWARN(PL_compiling.cop_warnings))
1154 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1155
10edeb5d 1156 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1157 break;
1ade1aa1
NC
1158 case SAVEt_RE_STATE:
1159 {
1160 const struct re_save_state *const state
1161 = (struct re_save_state *)
1162 (PL_savestack + PL_savestack_ix
1163 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1164 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1165
1ade1aa1
NC
1166 if (PL_reg_poscache != state->re_state_reg_poscache) {
1167 Safefree(PL_reg_poscache);
1ade1aa1 1168 }
46ab3289 1169 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1170 }
1171 break;
7c197c94
DM
1172 case SAVEt_PARSER:
1173 ptr = SSPOPPTR;
1174 parser_free((yy_parser *) ptr);
1175 break;
79072805 1176 default:
5637ef5b 1177 Perl_croak(aTHX_ "panic: leave_scope inconsistency %u", type);
79072805
LW
1178 }
1179 }
302c0c93 1180
284167a5 1181 TAINT_set(was);
f410a211
NC
1182
1183 PERL_ASYNC_CHECK();
79072805 1184}
8990e307 1185
8990e307 1186void
864dbfa3 1187Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1188{
97aff369 1189 dVAR;
7918f24d
NC
1190
1191 PERL_ARGS_ASSERT_CX_DUMP;
1192
35ff7856 1193#ifdef DEBUGGING
22c35a8c 1194 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1195 if (CxTYPE(cx) != CXt_SUBST) {
e8d9e9d0 1196 const char *gimme_text;
760ac839 1197 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1198 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_oldcop));
760ac839
LW
1200 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1201 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1202 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1203 PTR2UV(cx->blk_oldpm));
e8d9e9d0
VP
1204 switch (cx->blk_gimme) {
1205 case G_VOID:
1206 gimme_text = "VOID";
1207 break;
1208 case G_SCALAR:
1209 gimme_text = "SCALAR";
1210 break;
1211 case G_ARRAY:
1212 gimme_text = "LIST";
1213 break;
1214 default:
1215 gimme_text = "UNKNOWN";
1216 break;
1217 }
1218 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", gimme_text);
8990e307 1219 }
6b35e009 1220 switch (CxTYPE(cx)) {
8990e307
LW
1221 case CXt_NULL:
1222 case CXt_BLOCK:
1223 break;
146174a9 1224 case CXt_FORMAT:
f9c764c5
NC
1225 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1226 PTR2UV(cx->blk_format.cv));
1227 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1228 PTR2UV(cx->blk_format.gv));
1229 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1230 PTR2UV(cx->blk_format.dfoutgv));
1231 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1232 (int)CxHASARGS(cx));
f9c764c5
NC
1233 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1234 PTR2UV(cx->blk_format.retop));
146174a9 1235 break;
8990e307 1236 case CXt_SUB:
146174a9
CB
1237 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1238 PTR2UV(cx->blk_sub.cv));
760ac839 1239 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1240 (long)cx->blk_sub.olddepth);
760ac839 1241 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1242 (int)CxHASARGS(cx));
1243 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1244 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1245 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1246 break;
1247 case CXt_EVAL:
760ac839 1248 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1249 (long)CxOLD_IN_EVAL(cx));
760ac839 1250 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1251 PL_op_name[CxOLD_OP_TYPE(cx)],
1252 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1253 if (cx->blk_eval.old_namesv)
1254 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1255 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1256 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1257 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1258 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1259 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1260 break;
1261
c6fdafd0 1262 case CXt_LOOP_LAZYIV:
d01136d6 1263 case CXt_LOOP_LAZYSV:
3b719c58
NC
1264 case CXt_LOOP_FOR:
1265 case CXt_LOOP_PLAIN:
0cbdab38 1266 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1267 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1268 (long)cx->blk_loop.resetsp);
022eaa24
NC
1269 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1270 PTR2UV(cx->blk_loop.my_op));
d01136d6 1271 /* XXX: not accurate for LAZYSV/IV */
146174a9 1272 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1273 PTR2UV(cx->blk_loop.state_u.ary.ary));
1274 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1275 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1276 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1277 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1278 break;
1279
1280 case CXt_SUBST:
760ac839 1281 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1282 (long)cx->sb_iters);
760ac839 1283 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1284 (long)cx->sb_maxiters);
35ef4773
GS
1285 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1286 (long)cx->sb_rflags);
760ac839 1287 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1288 (long)CxONCE(cx));
760ac839 1289 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1290 cx->sb_orig);
146174a9
CB
1291 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1292 PTR2UV(cx->sb_dstr));
1293 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1294 PTR2UV(cx->sb_targ));
1295 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1296 PTR2UV(cx->sb_s));
1297 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1298 PTR2UV(cx->sb_m));
1299 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1300 PTR2UV(cx->sb_strend));
1301 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1302 PTR2UV(cx->sb_rxres));
8990e307
LW
1303 break;
1304 }
65e66c80 1305#else
96a5add6 1306 PERL_UNUSED_CONTEXT;
65e66c80 1307 PERL_UNUSED_ARG(cx);
17c3b450 1308#endif /* DEBUGGING */
35ff7856 1309}
241d1a3b
NC
1310
1311/*
1312 * Local variables:
1313 * c-indentation-style: bsd
1314 * c-basic-offset: 4
14d04a33 1315 * indent-tabs-mode: nil
241d1a3b
NC
1316 * End:
1317 *
14d04a33 1318 * ex: set ts=8 sts=4 sw=4 et:
37442d52 1319 */