This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
eliminate next_op from struct block_loop
[perl5.git] / scope.c
CommitLineData
a0d0e21e 1/* scope.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * For the fashion of Minas Tirith was such that it was built on seven
13 * levels...
14 *
15 * [p.751 of _The Lord of the Rings_, V/i: "Minas Tirith"]
79072805
LW
16 */
17
ddfa107c 18/* This file contains functions to manipulate several of Perl's stacks;
166f8a29
DM
19 * in particular it contains code to push various types of things onto
20 * the savestack, then to pop them off and perform the correct restorative
21 * action for each one. This corresponds to the cleanup Perl does at
22 * each scope exit.
23 */
24
79072805 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_SCOPE_C
79072805
LW
27#include "perl.h"
28
a0d0e21e 29SV**
864dbfa3 30Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
a0d0e21e 31{
97aff369 32 dVAR;
7918f24d
NC
33
34 PERL_ARGS_ASSERT_STACK_GROW;
35
3280af22 36 PL_stack_sp = sp;
2ce36478 37#ifndef STRESS_REALLOC
3280af22 38 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
2ce36478 39#else
6b88bc9c 40 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
2ce36478 41#endif
3280af22 42 return PL_stack_sp;
a0d0e21e
LW
43}
44
2ce36478
SM
45#ifndef STRESS_REALLOC
46#define GROW(old) ((old) * 3 / 2)
47#else
48#define GROW(old) ((old) + 1)
49#endif
50
e336de0d 51PERL_SI *
864dbfa3 52Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
e336de0d 53{
97aff369 54 dVAR;
e336de0d 55 PERL_SI *si;
a02a5408 56 Newx(si, 1, PERL_SI);
e336de0d
GS
57 si->si_stack = newAV();
58 AvREAL_off(si->si_stack);
59 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
3280af22 60 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
e336de0d
GS
61 AvFILLp(si->si_stack) = 0;
62 si->si_prev = 0;
63 si->si_next = 0;
64 si->si_cxmax = cxitems - 1;
65 si->si_cxix = -1;
e788e7d3 66 si->si_type = PERLSI_UNDEF;
a02a5408 67 Newx(si->si_cxstack, cxitems, PERL_CONTEXT);
9965345d
JH
68 /* Without any kind of initialising PUSHSUBST()
69 * in pp_subst() will read uninitialised heap. */
7e337ee0 70 PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT);
e336de0d
GS
71 return si;
72}
73
79072805 74I32
864dbfa3 75Perl_cxinc(pTHX)
79072805 76{
97aff369 77 dVAR;
a3b680e6 78 const IV old_max = cxstack_max;
2ce36478 79 cxstack_max = GROW(cxstack_max);
401a9b14 80 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT);
9965345d
JH
81 /* Without any kind of initialising deep enough recursion
82 * will end up reading uninitialised PERL_CONTEXTs. */
109bf713 83 PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
79072805
LW
84 return cxstack_ix + 1;
85}
86
79072805 87void
864dbfa3 88Perl_push_scope(pTHX)
79072805 89{
97aff369 90 dVAR;
3280af22
NIS
91 if (PL_scopestack_ix == PL_scopestack_max) {
92 PL_scopestack_max = GROW(PL_scopestack_max);
93 Renew(PL_scopestack, PL_scopestack_max, I32);
d343c3ef
GG
94#ifdef DEBUGGING
95 Renew(PL_scopestack_name, PL_scopestack_max, const char*);
520bb150 96#endif
79072805 97 }
d343c3ef
GG
98#ifdef DEBUGGING
99 PL_scopestack_name[PL_scopestack_ix] = "unknown";
100#endif
3280af22 101 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
79072805
LW
102
103}
104
105void
864dbfa3 106Perl_pop_scope(pTHX)
79072805 107{
97aff369 108 dVAR;
35a4481c 109 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
8990e307 110 LEAVE_SCOPE(oldsave);
79072805
LW
111}
112
113void
864dbfa3 114Perl_markstack_grow(pTHX)
a0d0e21e 115{
97aff369 116 dVAR;
35a4481c
AL
117 const I32 oldmax = PL_markstack_max - PL_markstack;
118 const I32 newmax = GROW(oldmax);
a0d0e21e 119
3280af22
NIS
120 Renew(PL_markstack, newmax, I32);
121 PL_markstack_ptr = PL_markstack + oldmax;
122 PL_markstack_max = PL_markstack + newmax;
a0d0e21e
LW
123}
124
125void
864dbfa3 126Perl_savestack_grow(pTHX)
79072805 127{
97aff369 128 dVAR;
8aacddc1 129 PL_savestack_max = GROW(PL_savestack_max) + 4;
3280af22 130 Renew(PL_savestack, PL_savestack_max, ANY);
79072805
LW
131}
132
4b3c1a47
AE
133void
134Perl_savestack_grow_cnt(pTHX_ I32 need)
135{
97aff369 136 dVAR;
4b3c1a47
AE
137 PL_savestack_max = PL_savestack_ix + need;
138 Renew(PL_savestack, PL_savestack_max, ANY);
139}
140
2ce36478
SM
141#undef GROW
142
79072805 143void
864dbfa3 144Perl_tmps_grow(pTHX_ I32 n)
677b06e3 145{
97aff369 146 dVAR;
677b06e3
GS
147#ifndef STRESS_REALLOC
148 if (n < 128)
149 n = (PL_tmps_max < 512) ? 128 : 512;
150#endif
151 PL_tmps_max = PL_tmps_ix + n + 1;
152 Renew(PL_tmps_stack, PL_tmps_max, SV*);
153}
154
155
156void
864dbfa3 157Perl_free_tmps(pTHX)
79072805 158{
97aff369 159 dVAR;
79072805 160 /* XXX should tmps_floor live in cxstack? */
35a4481c 161 const I32 myfloor = PL_tmps_floor;
3280af22 162 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
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;
994d373a 395 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 396
1409bc06 397 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 398
994d373a
NC
399 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
400 SSCHECK(2);
401 SSPUSHPTR(intp);
402 SSPUSHUV(SAVEt_INT_SMALL | shifted);
403 } else
404 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
405}
406
407void
58188858
RGS
408Perl_save_I8(pTHX_ I8 *bytep)
409{
410 dVAR;
7918f24d
NC
411
412 PERL_ARGS_ASSERT_SAVE_I8;
413
6c61c2d4
NC
414 SSCHECK(2);
415 SSPUSHPTR(bytep);
416 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
417}
418
419void
87a84751
JH
420Perl_save_I16(pTHX_ I16 *intp)
421{
422 dVAR;
7918f24d
NC
423
424 PERL_ARGS_ASSERT_SAVE_I16;
425
c9441fce
NC
426 SSCHECK(2);
427 SSPUSHPTR(intp);
428 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
429}
430
431void
864dbfa3 432Perl_save_I32(pTHX_ I32 *intp)
79072805 433{
97aff369 434 dVAR;
89abef21 435 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
436
437 PERL_ARGS_ASSERT_SAVE_I32;
438
89abef21
NC
439 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
440 SSCHECK(2);
441 SSPUSHPTR(intp);
442 SSPUSHUV(SAVEt_I32_SMALL | shifted);
443 } else
444 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
445}
446
85e6fe83
LW
447/* Cannot use save_sptr() to store a char* since the SV** cast will
448 * force word-alignment and we'll miss the pointer.
449 */
450void
864dbfa3 451Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 452{
97aff369 453 dVAR;
7918f24d
NC
454
455 PERL_ARGS_ASSERT_SAVE_PPTR;
456
e22024d3 457 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
458}
459
79072805 460void
146174a9
CB
461Perl_save_vptr(pTHX_ void *ptr)
462{
97aff369 463 dVAR;
7918f24d
NC
464
465 PERL_ARGS_ASSERT_SAVE_VPTR;
466
e22024d3 467 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
468}
469
470void
864dbfa3 471Perl_save_sptr(pTHX_ SV **sptr)
79072805 472{
97aff369 473 dVAR;
7918f24d
NC
474
475 PERL_ARGS_ASSERT_SAVE_SPTR;
476
e22024d3 477 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
478}
479
c3564e5c 480void
09edbca0 481Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 482{
97aff369 483 dVAR;
c3564e5c 484 SSCHECK(4);
f3548bdc 485 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 486 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 487 SSPUSHPTR(PL_comppad);
c3564e5c 488 SSPUSHLONG((long)off);
c6bf6a65 489 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
490}
491
79072805 492void
864dbfa3 493Perl_save_hptr(pTHX_ HV **hptr)
79072805 494{
97aff369 495 dVAR;
7918f24d
NC
496
497 PERL_ARGS_ASSERT_SAVE_HPTR;
498
e22024d3 499 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
500}
501
502void
864dbfa3 503Perl_save_aptr(pTHX_ AV **aptr)
79072805 504{
97aff369 505 dVAR;
7918f24d
NC
506
507 PERL_ARGS_ASSERT_SAVE_APTR;
508
e22024d3 509 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
510}
511
512void
2fd8beea 513Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 514{
97aff369 515 dVAR;
8990e307 516 SSCHECK(2);
2fd8beea 517 SSPUSHPTR(ptr);
c6bf6a65 518 SSPUSHUV(type);
8990e307
LW
519}
520
521void
864dbfa3 522Perl_save_clearsv(pTHX_ SV **svp)
8990e307 523{
97aff369 524 dVAR;
cdcdfc56
NC
525 const UV offset = svp - PL_curpad;
526 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
527
528 PERL_ARGS_ASSERT_SAVE_CLEARSV;
529
f3548bdc 530 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
531 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
532 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
533 offset, svp, PL_curpad);
534
535 SSCHECK(1);
536 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 537 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
538}
539
540void
864dbfa3 541Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 542{
97aff369 543 dVAR;
7918f24d
NC
544
545 PERL_ARGS_ASSERT_SAVE_DELETE;
546
85a721ca 547 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
548}
549
550void
af097752
VP
551Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
552{
553 STRLEN len;
554 I32 klen;
555 const char *key;
556
557 PERL_ARGS_ASSERT_SAVE_HDELETE;
558
559 key = SvPV_const(keysv, len);
560 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
561 SvREFCNT_inc_simple_void_NN(hv);
562 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
563}
564
565void
c68ec7a9
VP
566Perl_save_adelete(pTHX_ AV *av, I32 key)
567{
568 dVAR;
569
570 PERL_ARGS_ASSERT_SAVE_ADELETE;
571
572 SvREFCNT_inc_void(av);
573 save_pushi32ptr(key, av, SAVEt_ADELETE);
574}
575
576void
12ab1f58
JH
577Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
578{
579 dVAR;
7918f24d
NC
580
581 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
582
12ab1f58
JH
583 SSCHECK(3);
584 SSPUSHDPTR(f);
585 SSPUSHPTR(p);
c6bf6a65 586 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
587}
588
589void
146174a9
CB
590Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
591{
97aff369 592 dVAR;
146174a9
CB
593 SSCHECK(3);
594 SSPUSHDXPTR(f);
595 SSPUSHPTR(p);
c6bf6a65 596 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
597}
598
599void
da8315f8
NC
600Perl_save_hints(pTHX)
601{
602 dVAR;
603 if (PL_compiling.cop_hints_hash) {
604 HINTS_REFCNT_LOCK;
605 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
606 HINTS_REFCNT_UNLOCK;
607 }
da8315f8 608 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
609 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
610 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 611 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
612 } else {
613 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 614 }
be84297e
NC
615}
616
617static void
618S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
619 const int type)
620{
621 SSCHECK(4);
622 SSPUSHPTR(ptr1);
623 SSPUSHINT(i);
624 SSPUSHPTR(ptr2);
c6bf6a65 625 SSPUSHUV(type);
da8315f8
NC
626}
627
628void
91d1c79f 629Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 630{
97aff369 631 dVAR;
bfc4de9f 632 SV *sv;
7918f24d 633
91d1c79f 634 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 635
0cbee0a4 636 SvGETMAGIC(*sptr);
be84297e
NC
637 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
638 SAVEt_AELEM);
5dd42e15
DM
639 /* if it gets reified later, the restore will have the wrong refcnt */
640 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 641 SvREFCNT_inc_void(*sptr);
91d1c79f 642 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
643 if (flags & SAVEf_KEEPOLDELEM)
644 return;
bfc4de9f
DM
645 sv = *sptr;
646 /* If we're localizing a tied array element, this new sv
647 * won't actually be stored in the array - so it won't get
648 * reaped when the localize ends. Ensure it gets reaped by
649 * mortifying it instead. DAPM */
daeb922a 650 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 651 sv_2mortal(sv);
4e4c362e
GS
652}
653
654void
af7df257 655Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 656{
97aff369 657 dVAR;
bfc4de9f 658 SV *sv;
7918f24d 659
af7df257 660 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 661
0cbee0a4 662 SvGETMAGIC(*sptr);
4e4c362e 663 SSCHECK(4);
b37c2d43 664 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 665 SSPUSHPTR(newSVsv(key));
4e4c362e 666 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 667 SSPUSHUV(SAVEt_HELEM);
af7df257 668 save_scalar_at(sptr, flags);
75d34a09
VP
669 if (flags & SAVEf_KEEPOLDELEM)
670 return;
bfc4de9f
DM
671 sv = *sptr;
672 /* If we're localizing a tied hash element, this new sv
673 * won't actually be stored in the hash - so it won't get
674 * reaped when the localize ends. Ensure it gets reaped by
675 * mortifying it instead. DAPM */
daeb922a 676 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 677 sv_2mortal(sv);
4e4c362e
GS
678}
679
2053acbf
NC
680SV*
681Perl_save_svref(pTHX_ SV **sptr)
682{
683 dVAR;
7918f24d
NC
684
685 PERL_ARGS_ASSERT_SAVE_SVREF;
686
2053acbf 687 SvGETMAGIC(*sptr);
e22024d3 688 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 689 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
690}
691
455ece5e 692I32
864dbfa3 693Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 694{
97aff369 695 dVAR;
35a4481c 696 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 697 - (char*)PL_savestack);
1be36ce0
NC
698 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
699 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 700
1be36ce0
NC
701 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
702 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
703 elems, size, pad);
704
705 SSGROW(elems + 1);
455ece5e
AD
706
707 PL_savestack_ix += elems;
1be36ce0 708 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
709 return start;
710}
711
462e5cf6 712void
864dbfa3 713Perl_leave_scope(pTHX_ I32 base)
79072805 714{
97aff369 715 dVAR;
79072805
LW
716 register SV *sv;
717 register SV *value;
718 register GV *gv;
719 register AV *av;
720 register HV *hv;
20454177 721 void* ptr;
f4dd75d9 722 register char* str;
161b7d16 723 I32 i;
302c0c93
NC
724 /* Localise the effects of the TAINT_NOT inside the loop. */
725 const bool was = PL_tainted;
79072805
LW
726
727 if (base < -1)
cea2e8a9 728 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
729 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
730 (long)PL_savestack_ix, (long)base));
3280af22 731 while (PL_savestack_ix > base) {
c6bf6a65
NC
732 UV uv = SSPOPUV;
733 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
734 TAINT_NOT;
735
c6bf6a65 736 switch (type) {
79072805 737 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
738 value = MUTABLE_SV(SSPOPPTR);
739 sv = MUTABLE_SV(SSPOPPTR);
79072805 740 sv_replace(sv,value);
3280af22 741 PL_localizing = 2;
79072805 742 SvSETMAGIC(sv);
3280af22 743 PL_localizing = 0;
79072805 744 break;
8aacddc1 745 case SAVEt_SV: /* scalar reference */
ad64d0ec 746 value = MUTABLE_SV(SSPOPPTR);
159b6efe 747 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 748 ptr = &GvSV(gv);
502c6561 749 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
750 restore_sv:
751 sv = *(SV**)ptr;
2053acbf
NC
752 *(SV**)ptr = value;
753 SvREFCNT_dec(sv);
754 PL_localizing = 2;
755 SvSETMAGIC(value);
756 PL_localizing = 0;
757 SvREFCNT_dec(value);
758 if (av) /* actually an av, hv or gv */
759 SvREFCNT_dec(av);
760 break;
8aacddc1 761 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 762 ptr = SSPOPPTR;
b03d03b0 763 str = (char*)SSPOPPTR;
f4dd75d9
GS
764 if (*(char**)ptr != str) {
765 Safefree(*(char**)ptr);
766 *(char**)ptr = str;
767 }
768 break;
05ec9bb3
NIS
769 case SAVEt_SHARED_PVREF: /* shared pv */
770 str = (char*)SSPOPPTR;
771 ptr = SSPOPPTR;
772 if (*(char**)ptr != str) {
5e54c26f 773#ifdef NETWARE
9ecbcc42 774 PerlMem_free(*(char**)ptr);
5e54c26f 775#else
05ec9bb3 776 PerlMemShared_free(*(char**)ptr);
5e54c26f 777#endif
05ec9bb3
NIS
778 *(char**)ptr = str;
779 }
780 break;
8aacddc1 781 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 782 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 783 ptr = SSPOPPTR;
f4dd75d9
GS
784 sv = *(SV**)ptr;
785 *(SV**)ptr = value;
786 SvREFCNT_dec(sv);
b9d12d37
GS
787 SvREFCNT_dec(value);
788 break;
8aacddc1 789 case SAVEt_AV: /* array reference */
502c6561 790 av = MUTABLE_AV(SSPOPPTR);
159b6efe 791 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 792 SvREFCNT_dec(GvAV(gv));
8aacddc1 793 GvAV(gv) = av;
fb73857a 794 if (SvMAGICAL(av)) {
3280af22 795 PL_localizing = 2;
ad64d0ec 796 SvSETMAGIC(MUTABLE_SV(av));
3280af22 797 PL_localizing = 0;
fb73857a 798 }
8aacddc1
NIS
799 break;
800 case SAVEt_HV: /* hash reference */
85fbaab2 801 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 802 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 803 SvREFCNT_dec(GvHV(gv));
8aacddc1 804 GvHV(gv) = hv;
fb73857a 805 if (SvMAGICAL(hv)) {
3280af22 806 PL_localizing = 2;
ad64d0ec 807 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 808 PL_localizing = 0;
fb73857a 809 }
8aacddc1 810 break;
994d373a
NC
811 case SAVEt_INT_SMALL:
812 ptr = SSPOPPTR;
813 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
814 break;
79072805
LW
815 case SAVEt_INT: /* int reference */
816 ptr = SSPOPPTR;
817 *(int*)ptr = (int)SSPOPINT;
818 break;
9febdf04
RH
819 case SAVEt_BOOL: /* bool reference */
820 ptr = SSPOPPTR;
65504245 821 *(bool*)ptr = cBOOL(uv >> 8);
9febdf04 822 break;
89abef21
NC
823 case SAVEt_I32_SMALL:
824 ptr = SSPOPPTR;
825 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
826 break;
79072805
LW
827 case SAVEt_I32: /* I32 reference */
828 ptr = SSPOPPTR;
3235b7a3
NC
829#ifdef PERL_DEBUG_READONLY_OPS
830 {
831 const I32 val = SSPOPINT;
832 if (*(I32*)ptr != val)
833 *(I32*)ptr = val;
834 }
835#else
79072805 836 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 837#endif
79072805
LW
838 break;
839 case SAVEt_SPTR: /* SV* reference */
840 ptr = SSPOPPTR;
ad64d0ec 841 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 842 break;
146174a9 843 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
844 case SAVEt_PPTR: /* char* reference */
845 ptr = SSPOPPTR;
846 *(char**)ptr = (char*)SSPOPPTR;
847 break;
79072805
LW
848 case SAVEt_HPTR: /* HV* reference */
849 ptr = SSPOPPTR;
85fbaab2 850 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
851 break;
852 case SAVEt_APTR: /* AV* reference */
853 ptr = SSPOPPTR;
502c6561 854 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 855 break;
fb73857a 856 case SAVEt_GP: /* scalar reference */
159b6efe 857 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 858 gp_free(gv);
b9e00b79
LRG
859 GvGP(gv) = (GP*)SSPOPPTR;
860 if (SSPOPINT)
861 SvFAKE_on(gv);
dd69841b
BB
862 /* putting a method back into circulation ("local")*/
863 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
864 mro_method_changed_in(hv);
4633a7c4 865 SvREFCNT_dec(gv);
8aacddc1 866 break;
8990e307
LW
867 case SAVEt_FREESV:
868 ptr = SSPOPPTR;
ad64d0ec 869 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 870 break;
26d9b02f
JH
871 case SAVEt_MORTALIZESV:
872 ptr = SSPOPPTR;
ad64d0ec 873 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 874 break;
8990e307
LW
875 case SAVEt_FREEOP:
876 ptr = SSPOPPTR;
f3548bdc 877 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
878 op_free((OP*)ptr);
879 break;
880 case SAVEt_FREEPV:
881 ptr = SSPOPPTR;
1df70142 882 Safefree(ptr);
8990e307
LW
883 break;
884 case SAVEt_CLEARSV:
cdcdfc56 885 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 886 sv = *(SV**)ptr;
dd2155a4
DM
887
888 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
889 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
890 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
891 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
892 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
893 ));
894
bc44cdaf
GS
895 /* Can clear pad variable in place? */
896 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
897 /*
898 * if a my variable that was made readonly is going out of
899 * scope, we want to remove the readonlyness so that it can
900 * go out of scope quietly
8aacddc1 901 */
a26e96df 902 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
903 SvREADONLY_off(sv);
904
6fc92669 905 if (SvTHINKFIRST(sv))
840a7b70 906 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
907 if (SvMAGICAL(sv))
908 mg_free(sv);
8990e307
LW
909
910 switch (SvTYPE(sv)) {
911 case SVt_NULL:
912 break;
913 case SVt_PVAV:
502c6561 914 av_clear(MUTABLE_AV(sv));
8990e307
LW
915 break;
916 case SVt_PVHV:
85fbaab2 917 hv_clear(MUTABLE_HV(sv));
8990e307
LW
918 break;
919 case SVt_PVCV:
cea2e8a9 920 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 921 default:
0c34ef67 922 SvOK_off(sv);
8990e307
LW
923 break;
924 }
d9d18af6 925 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
926 }
927 else { /* Someone has a claim on this, so abandon it. */
35a4481c 928 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 929 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
930 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
931 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 932 default: *(SV**)ptr = newSV(0); break;
8990e307 933 }
53868620 934 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
935 /* preserve pad nature, but also mark as not live
936 * for any closure capturing */
2740392c 937 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
938 }
939 break;
940 case SAVEt_DELETE:
941 ptr = SSPOPPTR;
85fbaab2 942 hv = MUTABLE_HV(ptr);
35d4f826 943 i = SSPOPINT;
8990e307 944 ptr = SSPOPPTR;
35d4f826 945 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 946 SvREFCNT_dec(hv);
8aacddc1 947 Safefree(ptr);
8990e307 948 break;
c68ec7a9
VP
949 case SAVEt_ADELETE:
950 ptr = SSPOPPTR;
951 av = MUTABLE_AV(ptr);
952 i = SSPOPINT;
953 (void)av_delete(av, i, G_DISCARD);
954 SvREFCNT_dec(av);
955 break;
146174a9
CB
956 case SAVEt_DESTRUCTOR_X:
957 ptr = SSPOPPTR;
acfe0abc 958 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
959 break;
960 case SAVEt_REGCONTEXT:
e0fa7e2b 961 /* regexp must have croaked */
455ece5e 962 case SAVEt_ALLOC:
1be36ce0 963 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 964 break;
55497cff 965 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 966 i = SSPOPINT;
3280af22 967 PL_stack_sp = PL_stack_base + i;
55497cff 968 break;
ea8d6ae1
DB
969 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
970 i = SSPOPINT;
971 cxstack[i].blk_oldsp = SSPOPINT;
972 break;
161b7d16 973 case SAVEt_AELEM: /* array element */
ad64d0ec 974 value = MUTABLE_SV(SSPOPPTR);
161b7d16 975 i = SSPOPINT;
502c6561 976 av = MUTABLE_AV(SSPOPPTR);
658aef79 977 ptr = av_fetch(av,i,1);
5dd42e15
DM
978 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
979 SvREFCNT_dec(value);
4e4c362e
GS
980 if (ptr) {
981 sv = *(SV**)ptr;
3280af22 982 if (sv && sv != &PL_sv_undef) {
ad64d0ec 983 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 984 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
985 goto restore_sv;
986 }
987 }
988 SvREFCNT_dec(av);
989 SvREFCNT_dec(value);
990 break;
161b7d16 991 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
992 value = MUTABLE_SV(SSPOPPTR);
993 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 994 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 995 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 996 SvREFCNT_dec(sv);
4e4c362e 997 if (ptr) {
35a4481c 998 const SV * const oval = HeVAL((HE*)ptr);
3280af22 999 if (oval && oval != &PL_sv_undef) {
4e4c362e 1000 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1001 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1002 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1003 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1004 goto restore_sv;
1005 }
1006 }
1007 SvREFCNT_dec(hv);
4e4c362e
GS
1008 SvREFCNT_dec(value);
1009 break;
462e5cf6 1010 case SAVEt_OP:
533c011a 1011 PL_op = (OP*)SSPOPPTR;
462e5cf6 1012 break;
25eaa213 1013 case SAVEt_HINTS:
045ac317 1014 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 1015 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
1016 GvHV(PL_hintgv) = NULL;
1017 }
c28fe1ec
NC
1018 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1019 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 1020 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1021 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1022 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1023 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1024 assert(GvHV(PL_hintgv));
1025 } else if (!GvHV(PL_hintgv)) {
1026 /* Need to add a new one manually, else gv_fetchpv() can
1027 add one in this code:
1028
1029 if (SvTYPE(gv) == SVt_PVGV) {
1030 if (add) {
1031 GvMULTI_on(gv);
1032 gv_init_sv(gv, sv_type);
1033 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1034 require_errno(gv);
1035 }
1036 return gv;
1037 }
1038
1039 and it won't have the magic set. */
1040
1041 HV *const hv = newHV();
1042 hv_magic(hv, NULL, PERL_MAGIC_hints);
1043 GvHV(PL_hintgv) = hv;
dfa41748 1044 }
5b9c0671 1045 assert(GvHV(PL_hintgv));
b3ac6de7 1046 break;
cb50131a 1047 case SAVEt_COMPPAD:
f3548bdc 1048 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1049 if (PL_comppad)
cb50131a
CB
1050 PL_curpad = AvARRAY(PL_comppad);
1051 else
4608196e 1052 PL_curpad = NULL;
cb50131a 1053 break;
09edbca0 1054 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1055 {
35a4481c 1056 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1057 SV **svp;
c3564e5c 1058 ptr = SSPOPPTR;
09edbca0
NC
1059 assert (ptr);
1060 svp = AvARRAY((PAD*)ptr) + off;
1061 /* This mortalizing used to be done by POPLOOP() via itersave.
1062 But as we have all the information here, we can do it here,
1063 save even having to have itersave in the struct. */
1064 sv_2mortal(*svp);
ad64d0ec 1065 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1066 }
1067 break;
8b7059b1
DM
1068 case SAVEt_SAVESWITCHSTACK:
1069 {
1070 dSP;
502c6561
NC
1071 AV *const t = MUTABLE_AV(SSPOPPTR);
1072 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1073 SWITCHSTACK(t,f);
1074 PL_curstackinfo->si_stack = f;
1075 }
1076 break;
14f338dc
DM
1077 case SAVEt_SET_SVFLAGS:
1078 {
35a4481c
AL
1079 const U32 val = (U32)SSPOPINT;
1080 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1081 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1082 SvFLAGS(sv) &= ~mask;
1083 SvFLAGS(sv) |= val;
1084 }
1085 break;
95e06916
NC
1086
1087 /* This would be a mathom, but Perl_save_svref() calls a static
1088 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1089 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1090 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1091 ptr = SSPOPPTR;
1092 av = NULL; /* what to refcnt_dec */
1093 goto restore_sv;
95e06916
NC
1094
1095 /* These are only saved in mathoms.c */
1096 case SAVEt_NSTAB:
159b6efe 1097 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1098 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1099 break;
2053acbf
NC
1100 case SAVEt_LONG: /* long reference */
1101 ptr = SSPOPPTR;
1102 *(long*)ptr = (long)SSPOPLONG;
1103 break;
95e06916
NC
1104 case SAVEt_IV: /* IV reference */
1105 ptr = SSPOPPTR;
1106 *(IV*)ptr = (IV)SSPOPIV;
1107 break;
1108
2053acbf
NC
1109 case SAVEt_I16: /* I16 reference */
1110 ptr = SSPOPPTR;
c9441fce 1111 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1112 break;
1113 case SAVEt_I8: /* I8 reference */
1114 ptr = SSPOPPTR;
6c61c2d4 1115 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1116 break;
2053acbf
NC
1117 case SAVEt_DESTRUCTOR:
1118 ptr = SSPOPPTR;
1119 (*SSPOPDPTR)(ptr);
1120 break;
fc15ae8f
NC
1121 case SAVEt_COP_ARYBASE:
1122 ptr = SSPOPPTR;
1123 i = SSPOPINT;
1124 CopARYBASE_set((COP *)ptr, i);
1125 break;
68da3b2f
NC
1126 case SAVEt_COMPILE_WARNINGS:
1127 ptr = SSPOPPTR;
72dc9ed5 1128
68da3b2f
NC
1129 if (!specialWARN(PL_compiling.cop_warnings))
1130 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1131
10edeb5d 1132 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1133 break;
1ade1aa1
NC
1134 case SAVEt_RE_STATE:
1135 {
1136 const struct re_save_state *const state
1137 = (struct re_save_state *)
1138 (PL_savestack + PL_savestack_ix
1139 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1140 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1141
1ade1aa1
NC
1142 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1143 Safefree(PL_reg_start_tmp);
1ade1aa1 1144 }
1ade1aa1
NC
1145 if (PL_reg_poscache != state->re_state_reg_poscache) {
1146 Safefree(PL_reg_poscache);
1ade1aa1 1147 }
46ab3289 1148 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1149 }
1150 break;
7c197c94
DM
1151 case SAVEt_PARSER:
1152 ptr = SSPOPPTR;
1153 parser_free((yy_parser *) ptr);
1154 break;
79072805 1155 default:
cea2e8a9 1156 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1157 }
1158 }
302c0c93
NC
1159
1160 PL_tainted = was;
f410a211
NC
1161
1162 PERL_ASYNC_CHECK();
79072805 1163}
8990e307 1164
8990e307 1165void
864dbfa3 1166Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1167{
97aff369 1168 dVAR;
7918f24d
NC
1169
1170 PERL_ARGS_ASSERT_CX_DUMP;
1171
35ff7856 1172#ifdef DEBUGGING
22c35a8c 1173 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1174 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1175 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1176 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1177 PTR2UV(cx->blk_oldcop));
760ac839
LW
1178 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1179 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1180 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1181 PTR2UV(cx->blk_oldpm));
760ac839 1182 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1183 }
6b35e009 1184 switch (CxTYPE(cx)) {
8990e307
LW
1185 case CXt_NULL:
1186 case CXt_BLOCK:
1187 break;
146174a9 1188 case CXt_FORMAT:
f9c764c5
NC
1189 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1190 PTR2UV(cx->blk_format.cv));
1191 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1192 PTR2UV(cx->blk_format.gv));
1193 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1194 PTR2UV(cx->blk_format.dfoutgv));
1195 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1196 (int)CxHASARGS(cx));
f9c764c5
NC
1197 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1198 PTR2UV(cx->blk_format.retop));
146174a9 1199 break;
8990e307 1200 case CXt_SUB:
146174a9
CB
1201 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1202 PTR2UV(cx->blk_sub.cv));
760ac839 1203 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1204 (long)cx->blk_sub.olddepth);
760ac839 1205 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1206 (int)CxHASARGS(cx));
1207 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1208 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1209 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1210 break;
1211 case CXt_EVAL:
760ac839 1212 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1213 (long)CxOLD_IN_EVAL(cx));
760ac839 1214 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1215 PL_op_name[CxOLD_OP_TYPE(cx)],
1216 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1217 if (cx->blk_eval.old_namesv)
1218 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1219 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1220 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1221 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1222 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1223 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1224 break;
1225
c6fdafd0 1226 case CXt_LOOP_LAZYIV:
d01136d6 1227 case CXt_LOOP_LAZYSV:
3b719c58
NC
1228 case CXt_LOOP_FOR:
1229 case CXt_LOOP_PLAIN:
0cbdab38 1230 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1231 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1232 (long)cx->blk_loop.resetsp);
022eaa24
NC
1233 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1234 PTR2UV(cx->blk_loop.my_op));
d01136d6 1235 /* XXX: not accurate for LAZYSV/IV */
146174a9 1236 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1237 PTR2UV(cx->blk_loop.state_u.ary.ary));
1238 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1239 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1240 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1241 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1242 break;
1243
1244 case CXt_SUBST:
760ac839 1245 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1246 (long)cx->sb_iters);
760ac839 1247 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1248 (long)cx->sb_maxiters);
35ef4773
GS
1249 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1250 (long)cx->sb_rflags);
760ac839 1251 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1252 (long)CxONCE(cx));
760ac839 1253 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1254 cx->sb_orig);
146174a9
CB
1255 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1256 PTR2UV(cx->sb_dstr));
1257 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1258 PTR2UV(cx->sb_targ));
1259 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1260 PTR2UV(cx->sb_s));
1261 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1262 PTR2UV(cx->sb_m));
1263 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1264 PTR2UV(cx->sb_strend));
1265 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1266 PTR2UV(cx->sb_rxres));
8990e307
LW
1267 break;
1268 }
65e66c80 1269#else
96a5add6 1270 PERL_UNUSED_CONTEXT;
65e66c80 1271 PERL_UNUSED_ARG(cx);
17c3b450 1272#endif /* DEBUGGING */
35ff7856 1273}
241d1a3b
NC
1274
1275/*
1276 * Local variables:
1277 * c-indentation-style: bsd
1278 * c-basic-offset: 4
1279 * indent-tabs-mode: t
1280 * End:
1281 *
37442d52
RGS
1282 * ex: set ts=8 sts=4 sw=4 noet:
1283 */