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[perl5.git] / scope.c
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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
65504245 376 SSCHECK(2);
1409bc06 377 SSPUSHPTR(boolp);
65504245 378 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
379}
380
7623d426
NC
381void
382Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
383{
384 dVAR;
385 SSCHECK(3);
386 SSPUSHINT(i);
387 SSPUSHPTR(ptr);
c6bf6a65 388 SSPUSHUV(type);
79072805
LW
389}
390
391void
1409bc06 392Perl_save_int(pTHX_ int *intp)
9febdf04 393{
97aff369 394 dVAR;
7918f24d 395
1409bc06 396 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 397
1409bc06 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;
597 if (PL_compiling.cop_hints_hash) {
598 HINTS_REFCNT_LOCK;
599 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
600 HINTS_REFCNT_UNLOCK;
601 }
da8315f8 602 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
603 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
604 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 605 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
606 } else {
607 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 608 }
be84297e
NC
609}
610
611static void
612S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
613 const int type)
614{
615 SSCHECK(4);
616 SSPUSHPTR(ptr1);
617 SSPUSHINT(i);
618 SSPUSHPTR(ptr2);
c6bf6a65 619 SSPUSHUV(type);
da8315f8
NC
620}
621
622void
91d1c79f 623Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 624{
97aff369 625 dVAR;
bfc4de9f 626 SV *sv;
7918f24d 627
91d1c79f 628 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 629
0cbee0a4 630 SvGETMAGIC(*sptr);
be84297e
NC
631 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
632 SAVEt_AELEM);
5dd42e15
DM
633 /* if it gets reified later, the restore will have the wrong refcnt */
634 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 635 SvREFCNT_inc_void(*sptr);
91d1c79f 636 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
637 if (flags & SAVEf_KEEPOLDELEM)
638 return;
bfc4de9f
DM
639 sv = *sptr;
640 /* If we're localizing a tied array element, this new sv
641 * won't actually be stored in the array - so it won't get
642 * reaped when the localize ends. Ensure it gets reaped by
643 * mortifying it instead. DAPM */
daeb922a 644 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 645 sv_2mortal(sv);
4e4c362e
GS
646}
647
648void
af7df257 649Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 650{
97aff369 651 dVAR;
bfc4de9f 652 SV *sv;
7918f24d 653
af7df257 654 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 655
0cbee0a4 656 SvGETMAGIC(*sptr);
4e4c362e 657 SSCHECK(4);
b37c2d43 658 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 659 SSPUSHPTR(newSVsv(key));
4e4c362e 660 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 661 SSPUSHUV(SAVEt_HELEM);
af7df257 662 save_scalar_at(sptr, flags);
75d34a09
VP
663 if (flags & SAVEf_KEEPOLDELEM)
664 return;
bfc4de9f
DM
665 sv = *sptr;
666 /* If we're localizing a tied hash element, this new sv
667 * won't actually be stored in the hash - so it won't get
668 * reaped when the localize ends. Ensure it gets reaped by
669 * mortifying it instead. DAPM */
daeb922a 670 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 671 sv_2mortal(sv);
4e4c362e
GS
672}
673
2053acbf
NC
674SV*
675Perl_save_svref(pTHX_ SV **sptr)
676{
677 dVAR;
7918f24d
NC
678
679 PERL_ARGS_ASSERT_SAVE_SVREF;
680
2053acbf 681 SvGETMAGIC(*sptr);
e22024d3 682 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 683 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
684}
685
455ece5e 686I32
864dbfa3 687Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 688{
97aff369 689 dVAR;
35a4481c 690 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 691 - (char*)PL_savestack);
1be36ce0
NC
692 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
693 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 694
1be36ce0
NC
695 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
696 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
697 elems, size, pad);
698
699 SSGROW(elems + 1);
455ece5e
AD
700
701 PL_savestack_ix += elems;
1be36ce0 702 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
703 return start;
704}
705
462e5cf6 706void
864dbfa3 707Perl_leave_scope(pTHX_ I32 base)
79072805 708{
97aff369 709 dVAR;
79072805
LW
710 register SV *sv;
711 register SV *value;
712 register GV *gv;
713 register AV *av;
714 register HV *hv;
20454177 715 void* ptr;
f4dd75d9 716 register char* str;
161b7d16 717 I32 i;
302c0c93
NC
718 /* Localise the effects of the TAINT_NOT inside the loop. */
719 const bool was = PL_tainted;
79072805
LW
720
721 if (base < -1)
cea2e8a9 722 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
723 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
724 (long)PL_savestack_ix, (long)base));
3280af22 725 while (PL_savestack_ix > base) {
c6bf6a65
NC
726 UV uv = SSPOPUV;
727 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
728 TAINT_NOT;
729
c6bf6a65 730 switch (type) {
79072805 731 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
732 value = MUTABLE_SV(SSPOPPTR);
733 sv = MUTABLE_SV(SSPOPPTR);
79072805 734 sv_replace(sv,value);
3280af22 735 PL_localizing = 2;
79072805 736 SvSETMAGIC(sv);
3280af22 737 PL_localizing = 0;
79072805 738 break;
8aacddc1 739 case SAVEt_SV: /* scalar reference */
ad64d0ec 740 value = MUTABLE_SV(SSPOPPTR);
159b6efe 741 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 742 ptr = &GvSV(gv);
502c6561 743 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
744 restore_sv:
745 sv = *(SV**)ptr;
2053acbf
NC
746 *(SV**)ptr = value;
747 SvREFCNT_dec(sv);
748 PL_localizing = 2;
749 SvSETMAGIC(value);
750 PL_localizing = 0;
751 SvREFCNT_dec(value);
752 if (av) /* actually an av, hv or gv */
753 SvREFCNT_dec(av);
754 break;
8aacddc1 755 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 756 ptr = SSPOPPTR;
b03d03b0 757 str = (char*)SSPOPPTR;
f4dd75d9
GS
758 if (*(char**)ptr != str) {
759 Safefree(*(char**)ptr);
760 *(char**)ptr = str;
761 }
762 break;
05ec9bb3
NIS
763 case SAVEt_SHARED_PVREF: /* shared pv */
764 str = (char*)SSPOPPTR;
765 ptr = SSPOPPTR;
766 if (*(char**)ptr != str) {
5e54c26f 767#ifdef NETWARE
9ecbcc42 768 PerlMem_free(*(char**)ptr);
5e54c26f 769#else
05ec9bb3 770 PerlMemShared_free(*(char**)ptr);
5e54c26f 771#endif
05ec9bb3
NIS
772 *(char**)ptr = str;
773 }
774 break;
8aacddc1 775 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 776 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 777 ptr = SSPOPPTR;
f4dd75d9
GS
778 sv = *(SV**)ptr;
779 *(SV**)ptr = value;
780 SvREFCNT_dec(sv);
b9d12d37
GS
781 SvREFCNT_dec(value);
782 break;
8aacddc1 783 case SAVEt_AV: /* array reference */
502c6561 784 av = MUTABLE_AV(SSPOPPTR);
159b6efe 785 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 786 SvREFCNT_dec(GvAV(gv));
8aacddc1 787 GvAV(gv) = av;
fb73857a 788 if (SvMAGICAL(av)) {
3280af22 789 PL_localizing = 2;
ad64d0ec 790 SvSETMAGIC(MUTABLE_SV(av));
3280af22 791 PL_localizing = 0;
fb73857a 792 }
8aacddc1
NIS
793 break;
794 case SAVEt_HV: /* hash reference */
85fbaab2 795 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 796 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 797 SvREFCNT_dec(GvHV(gv));
8aacddc1 798 GvHV(gv) = hv;
fb73857a 799 if (SvMAGICAL(hv)) {
3280af22 800 PL_localizing = 2;
ad64d0ec 801 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 802 PL_localizing = 0;
fb73857a 803 }
8aacddc1 804 break;
79072805
LW
805 case SAVEt_INT: /* int reference */
806 ptr = SSPOPPTR;
807 *(int*)ptr = (int)SSPOPINT;
808 break;
9febdf04
RH
809 case SAVEt_BOOL: /* bool reference */
810 ptr = SSPOPPTR;
65504245 811 *(bool*)ptr = cBOOL(uv >> 8);
9febdf04 812 break;
89abef21
NC
813 case SAVEt_I32_SMALL:
814 ptr = SSPOPPTR;
815 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
816 break;
79072805
LW
817 case SAVEt_I32: /* I32 reference */
818 ptr = SSPOPPTR;
3235b7a3
NC
819#ifdef PERL_DEBUG_READONLY_OPS
820 {
821 const I32 val = SSPOPINT;
822 if (*(I32*)ptr != val)
823 *(I32*)ptr = val;
824 }
825#else
79072805 826 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 827#endif
79072805
LW
828 break;
829 case SAVEt_SPTR: /* SV* reference */
830 ptr = SSPOPPTR;
ad64d0ec 831 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 832 break;
146174a9 833 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
834 case SAVEt_PPTR: /* char* reference */
835 ptr = SSPOPPTR;
836 *(char**)ptr = (char*)SSPOPPTR;
837 break;
79072805
LW
838 case SAVEt_HPTR: /* HV* reference */
839 ptr = SSPOPPTR;
85fbaab2 840 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
841 break;
842 case SAVEt_APTR: /* AV* reference */
843 ptr = SSPOPPTR;
502c6561 844 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 845 break;
fb73857a 846 case SAVEt_GP: /* scalar reference */
159b6efe 847 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 848 gp_free(gv);
b9e00b79
LRG
849 GvGP(gv) = (GP*)SSPOPPTR;
850 if (SSPOPINT)
851 SvFAKE_on(gv);
dd69841b
BB
852 /* putting a method back into circulation ("local")*/
853 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
854 mro_method_changed_in(hv);
4633a7c4 855 SvREFCNT_dec(gv);
8aacddc1 856 break;
8990e307
LW
857 case SAVEt_FREESV:
858 ptr = SSPOPPTR;
ad64d0ec 859 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 860 break;
26d9b02f
JH
861 case SAVEt_MORTALIZESV:
862 ptr = SSPOPPTR;
ad64d0ec 863 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 864 break;
8990e307
LW
865 case SAVEt_FREEOP:
866 ptr = SSPOPPTR;
f3548bdc 867 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
868 op_free((OP*)ptr);
869 break;
870 case SAVEt_FREEPV:
871 ptr = SSPOPPTR;
1df70142 872 Safefree(ptr);
8990e307
LW
873 break;
874 case SAVEt_CLEARSV:
cdcdfc56 875 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 876 sv = *(SV**)ptr;
dd2155a4
DM
877
878 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
879 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
880 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
881 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
882 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
883 ));
884
bc44cdaf
GS
885 /* Can clear pad variable in place? */
886 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
887 /*
888 * if a my variable that was made readonly is going out of
889 * scope, we want to remove the readonlyness so that it can
890 * go out of scope quietly
8aacddc1 891 */
a26e96df 892 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
893 SvREADONLY_off(sv);
894
6fc92669 895 if (SvTHINKFIRST(sv))
840a7b70 896 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
897 if (SvMAGICAL(sv))
898 mg_free(sv);
8990e307
LW
899
900 switch (SvTYPE(sv)) {
901 case SVt_NULL:
902 break;
903 case SVt_PVAV:
502c6561 904 av_clear(MUTABLE_AV(sv));
8990e307
LW
905 break;
906 case SVt_PVHV:
85fbaab2 907 hv_clear(MUTABLE_HV(sv));
8990e307
LW
908 break;
909 case SVt_PVCV:
cea2e8a9 910 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 911 default:
0c34ef67 912 SvOK_off(sv);
8990e307
LW
913 break;
914 }
d9d18af6 915 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
916 }
917 else { /* Someone has a claim on this, so abandon it. */
35a4481c 918 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 919 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
920 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
921 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 922 default: *(SV**)ptr = newSV(0); break;
8990e307 923 }
53868620 924 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
925 /* preserve pad nature, but also mark as not live
926 * for any closure capturing */
2740392c 927 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
928 }
929 break;
930 case SAVEt_DELETE:
931 ptr = SSPOPPTR;
85fbaab2 932 hv = MUTABLE_HV(ptr);
35d4f826 933 i = SSPOPINT;
8990e307 934 ptr = SSPOPPTR;
35d4f826 935 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 936 SvREFCNT_dec(hv);
8aacddc1 937 Safefree(ptr);
8990e307 938 break;
c68ec7a9
VP
939 case SAVEt_ADELETE:
940 ptr = SSPOPPTR;
941 av = MUTABLE_AV(ptr);
942 i = SSPOPINT;
943 (void)av_delete(av, i, G_DISCARD);
944 SvREFCNT_dec(av);
945 break;
146174a9
CB
946 case SAVEt_DESTRUCTOR_X:
947 ptr = SSPOPPTR;
acfe0abc 948 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
949 break;
950 case SAVEt_REGCONTEXT:
e0fa7e2b 951 /* regexp must have croaked */
455ece5e 952 case SAVEt_ALLOC:
1be36ce0 953 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 954 break;
55497cff 955 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 956 i = SSPOPINT;
3280af22 957 PL_stack_sp = PL_stack_base + i;
55497cff 958 break;
ea8d6ae1
DB
959 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
960 i = SSPOPINT;
961 cxstack[i].blk_oldsp = SSPOPINT;
962 break;
161b7d16 963 case SAVEt_AELEM: /* array element */
ad64d0ec 964 value = MUTABLE_SV(SSPOPPTR);
161b7d16 965 i = SSPOPINT;
502c6561 966 av = MUTABLE_AV(SSPOPPTR);
658aef79 967 ptr = av_fetch(av,i,1);
5dd42e15
DM
968 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
969 SvREFCNT_dec(value);
4e4c362e
GS
970 if (ptr) {
971 sv = *(SV**)ptr;
3280af22 972 if (sv && sv != &PL_sv_undef) {
ad64d0ec 973 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 974 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
975 goto restore_sv;
976 }
977 }
978 SvREFCNT_dec(av);
979 SvREFCNT_dec(value);
980 break;
161b7d16 981 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
982 value = MUTABLE_SV(SSPOPPTR);
983 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 984 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 985 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 986 SvREFCNT_dec(sv);
4e4c362e 987 if (ptr) {
35a4481c 988 const SV * const oval = HeVAL((HE*)ptr);
3280af22 989 if (oval && oval != &PL_sv_undef) {
4e4c362e 990 ptr = &HeVAL((HE*)ptr);
ad64d0ec 991 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 992 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 993 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
994 goto restore_sv;
995 }
996 }
997 SvREFCNT_dec(hv);
4e4c362e
GS
998 SvREFCNT_dec(value);
999 break;
462e5cf6 1000 case SAVEt_OP:
533c011a 1001 PL_op = (OP*)SSPOPPTR;
462e5cf6 1002 break;
25eaa213 1003 case SAVEt_HINTS:
045ac317 1004 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 1005 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
1006 GvHV(PL_hintgv) = NULL;
1007 }
c28fe1ec
NC
1008 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1009 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 1010 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1011 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1012 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1013 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1014 assert(GvHV(PL_hintgv));
1015 } else if (!GvHV(PL_hintgv)) {
1016 /* Need to add a new one manually, else gv_fetchpv() can
1017 add one in this code:
1018
1019 if (SvTYPE(gv) == SVt_PVGV) {
1020 if (add) {
1021 GvMULTI_on(gv);
1022 gv_init_sv(gv, sv_type);
1023 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1024 require_errno(gv);
1025 }
1026 return gv;
1027 }
1028
1029 and it won't have the magic set. */
1030
1031 HV *const hv = newHV();
1032 hv_magic(hv, NULL, PERL_MAGIC_hints);
1033 GvHV(PL_hintgv) = hv;
dfa41748 1034 }
5b9c0671 1035 assert(GvHV(PL_hintgv));
b3ac6de7 1036 break;
cb50131a 1037 case SAVEt_COMPPAD:
f3548bdc 1038 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1039 if (PL_comppad)
cb50131a
CB
1040 PL_curpad = AvARRAY(PL_comppad);
1041 else
4608196e 1042 PL_curpad = NULL;
cb50131a 1043 break;
09edbca0 1044 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1045 {
35a4481c 1046 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1047 SV **svp;
c3564e5c 1048 ptr = SSPOPPTR;
09edbca0
NC
1049 assert (ptr);
1050 svp = AvARRAY((PAD*)ptr) + off;
1051 /* This mortalizing used to be done by POPLOOP() via itersave.
1052 But as we have all the information here, we can do it here,
1053 save even having to have itersave in the struct. */
1054 sv_2mortal(*svp);
ad64d0ec 1055 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1056 }
1057 break;
8b7059b1
DM
1058 case SAVEt_SAVESWITCHSTACK:
1059 {
1060 dSP;
502c6561
NC
1061 AV *const t = MUTABLE_AV(SSPOPPTR);
1062 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1063 SWITCHSTACK(t,f);
1064 PL_curstackinfo->si_stack = f;
1065 }
1066 break;
14f338dc
DM
1067 case SAVEt_SET_SVFLAGS:
1068 {
35a4481c
AL
1069 const U32 val = (U32)SSPOPINT;
1070 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1071 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1072 SvFLAGS(sv) &= ~mask;
1073 SvFLAGS(sv) |= val;
1074 }
1075 break;
95e06916
NC
1076
1077 /* This would be a mathom, but Perl_save_svref() calls a static
1078 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1079 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1080 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1081 ptr = SSPOPPTR;
1082 av = NULL; /* what to refcnt_dec */
1083 goto restore_sv;
95e06916
NC
1084
1085 /* These are only saved in mathoms.c */
1086 case SAVEt_NSTAB:
159b6efe 1087 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1088 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1089 break;
2053acbf
NC
1090 case SAVEt_LONG: /* long reference */
1091 ptr = SSPOPPTR;
1092 *(long*)ptr = (long)SSPOPLONG;
1093 break;
95e06916
NC
1094 case SAVEt_IV: /* IV reference */
1095 ptr = SSPOPPTR;
1096 *(IV*)ptr = (IV)SSPOPIV;
1097 break;
1098
2053acbf
NC
1099 case SAVEt_I16: /* I16 reference */
1100 ptr = SSPOPPTR;
c9441fce 1101 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1102 break;
1103 case SAVEt_I8: /* I8 reference */
1104 ptr = SSPOPPTR;
6c61c2d4 1105 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1106 break;
2053acbf
NC
1107 case SAVEt_DESTRUCTOR:
1108 ptr = SSPOPPTR;
1109 (*SSPOPDPTR)(ptr);
1110 break;
fc15ae8f
NC
1111 case SAVEt_COP_ARYBASE:
1112 ptr = SSPOPPTR;
1113 i = SSPOPINT;
1114 CopARYBASE_set((COP *)ptr, i);
1115 break;
68da3b2f
NC
1116 case SAVEt_COMPILE_WARNINGS:
1117 ptr = SSPOPPTR;
72dc9ed5 1118
68da3b2f
NC
1119 if (!specialWARN(PL_compiling.cop_warnings))
1120 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1121
10edeb5d 1122 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1123 break;
1ade1aa1
NC
1124 case SAVEt_RE_STATE:
1125 {
1126 const struct re_save_state *const state
1127 = (struct re_save_state *)
1128 (PL_savestack + PL_savestack_ix
1129 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1130 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1131
1ade1aa1
NC
1132 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1133 Safefree(PL_reg_start_tmp);
1ade1aa1 1134 }
1ade1aa1
NC
1135 if (PL_reg_poscache != state->re_state_reg_poscache) {
1136 Safefree(PL_reg_poscache);
1ade1aa1 1137 }
46ab3289 1138 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1139 }
1140 break;
7c197c94
DM
1141 case SAVEt_PARSER:
1142 ptr = SSPOPPTR;
1143 parser_free((yy_parser *) ptr);
1144 break;
79072805 1145 default:
cea2e8a9 1146 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1147 }
1148 }
302c0c93
NC
1149
1150 PL_tainted = was;
f410a211
NC
1151
1152 PERL_ASYNC_CHECK();
79072805 1153}
8990e307 1154
8990e307 1155void
864dbfa3 1156Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1157{
97aff369 1158 dVAR;
7918f24d
NC
1159
1160 PERL_ARGS_ASSERT_CX_DUMP;
1161
35ff7856 1162#ifdef DEBUGGING
22c35a8c 1163 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1164 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1165 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1166 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1167 PTR2UV(cx->blk_oldcop));
760ac839
LW
1168 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1169 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1170 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1171 PTR2UV(cx->blk_oldpm));
760ac839 1172 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1173 }
6b35e009 1174 switch (CxTYPE(cx)) {
8990e307
LW
1175 case CXt_NULL:
1176 case CXt_BLOCK:
1177 break;
146174a9 1178 case CXt_FORMAT:
f9c764c5
NC
1179 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1180 PTR2UV(cx->blk_format.cv));
1181 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1182 PTR2UV(cx->blk_format.gv));
1183 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1184 PTR2UV(cx->blk_format.dfoutgv));
1185 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1186 (int)CxHASARGS(cx));
f9c764c5
NC
1187 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1188 PTR2UV(cx->blk_format.retop));
146174a9 1189 break;
8990e307 1190 case CXt_SUB:
146174a9
CB
1191 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1192 PTR2UV(cx->blk_sub.cv));
760ac839 1193 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1194 (long)cx->blk_sub.olddepth);
760ac839 1195 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1196 (int)CxHASARGS(cx));
1197 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1198 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1200 break;
1201 case CXt_EVAL:
760ac839 1202 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1203 (long)CxOLD_IN_EVAL(cx));
760ac839 1204 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1205 PL_op_name[CxOLD_OP_TYPE(cx)],
1206 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1207 if (cx->blk_eval.old_namesv)
1208 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1209 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1210 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1211 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1212 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1213 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1214 break;
1215
c6fdafd0 1216 case CXt_LOOP_LAZYIV:
d01136d6 1217 case CXt_LOOP_LAZYSV:
3b719c58
NC
1218 case CXt_LOOP_FOR:
1219 case CXt_LOOP_PLAIN:
0cbdab38 1220 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1221 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1222 (long)cx->blk_loop.resetsp);
022eaa24
NC
1223 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1224 PTR2UV(cx->blk_loop.my_op));
146174a9 1225 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
022eaa24 1226 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
d01136d6 1227 /* XXX: not accurate for LAZYSV/IV */
146174a9 1228 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1229 PTR2UV(cx->blk_loop.state_u.ary.ary));
1230 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1231 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1232 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1233 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1234 break;
1235
1236 case CXt_SUBST:
760ac839 1237 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1238 (long)cx->sb_iters);
760ac839 1239 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1240 (long)cx->sb_maxiters);
35ef4773
GS
1241 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1242 (long)cx->sb_rflags);
760ac839 1243 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1244 (long)CxONCE(cx));
760ac839 1245 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1246 cx->sb_orig);
146174a9
CB
1247 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1248 PTR2UV(cx->sb_dstr));
1249 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1250 PTR2UV(cx->sb_targ));
1251 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1252 PTR2UV(cx->sb_s));
1253 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1254 PTR2UV(cx->sb_m));
1255 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1256 PTR2UV(cx->sb_strend));
1257 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1258 PTR2UV(cx->sb_rxres));
8990e307
LW
1259 break;
1260 }
65e66c80 1261#else
96a5add6 1262 PERL_UNUSED_CONTEXT;
65e66c80 1263 PERL_UNUSED_ARG(cx);
17c3b450 1264#endif /* DEBUGGING */
35ff7856 1265}
241d1a3b
NC
1266
1267/*
1268 * Local variables:
1269 * c-indentation-style: bsd
1270 * c-basic-offset: 4
1271 * indent-tabs-mode: t
1272 * End:
1273 *
37442d52
RGS
1274 * ex: set ts=8 sts=4 sw=4 noet:
1275 */