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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;
79072805
LW
102
103}
104
105void
864dbfa3 106Perl_pop_scope(pTHX)
79072805 107{
97aff369 108 dVAR;
35a4481c 109 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
8990e307 110 LEAVE_SCOPE(oldsave);
79072805
LW
111}
112
113void
864dbfa3 114Perl_markstack_grow(pTHX)
a0d0e21e 115{
97aff369 116 dVAR;
35a4481c
AL
117 const I32 oldmax = PL_markstack_max - PL_markstack;
118 const I32 newmax = GROW(oldmax);
a0d0e21e 119
3280af22
NIS
120 Renew(PL_markstack, newmax, I32);
121 PL_markstack_ptr = PL_markstack + oldmax;
122 PL_markstack_max = PL_markstack + newmax;
a0d0e21e
LW
123}
124
125void
864dbfa3 126Perl_savestack_grow(pTHX)
79072805 127{
97aff369 128 dVAR;
8aacddc1 129 PL_savestack_max = GROW(PL_savestack_max) + 4;
3280af22 130 Renew(PL_savestack, PL_savestack_max, ANY);
79072805
LW
131}
132
4b3c1a47
AE
133void
134Perl_savestack_grow_cnt(pTHX_ I32 need)
135{
97aff369 136 dVAR;
4b3c1a47
AE
137 PL_savestack_max = PL_savestack_ix + need;
138 Renew(PL_savestack, PL_savestack_max, ANY);
139}
140
2ce36478
SM
141#undef GROW
142
79072805 143void
864dbfa3 144Perl_tmps_grow(pTHX_ I32 n)
677b06e3 145{
97aff369 146 dVAR;
677b06e3
GS
147#ifndef STRESS_REALLOC
148 if (n < 128)
149 n = (PL_tmps_max < 512) ? 128 : 512;
150#endif
151 PL_tmps_max = PL_tmps_ix + n + 1;
152 Renew(PL_tmps_stack, PL_tmps_max, SV*);
153}
154
155
156void
864dbfa3 157Perl_free_tmps(pTHX)
79072805 158{
97aff369 159 dVAR;
79072805 160 /* XXX should tmps_floor live in cxstack? */
35a4481c 161 const I32 myfloor = PL_tmps_floor;
3280af22 162 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
22ade07d 163 SV* const sv = PL_tmps_stack[PL_tmps_ix--];
72581b5b
VP
164#ifdef PERL_POISON
165 PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB);
22ade07d 166#endif
8aacddc1 167 if (sv && sv != &PL_sv_undef) {
463ee0b2 168 SvTEMP_off(sv);
8990e307 169 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 170 }
79072805
LW
171 }
172}
173
76e3520e 174STATIC SV *
af7df257 175S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 176{
97aff369 177 dVAR;
75d34a09 178 SV * osv;
eb578fdb 179 SV *sv;
79072805 180
7918f24d
NC
181 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
182
75d34a09
VP
183 osv = *sptr;
184 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
185
f1f99dc1 186 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv)) {
a0d0e21e 187 if (SvGMAGICAL(osv)) {
a0d0e21e 188 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 189 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
a0d0e21e 190 }
75d34a09 191 if (!(flags & SAVEf_KEEPOLDELEM))
2dcac756 192 mg_localize(osv, sv, cBOOL(flags & SAVEf_SETMAGIC));
79072805 193 }
75d34a09 194
79072805
LW
195 return sv;
196}
197
dfcd3de5
NC
198void
199Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
200{
201 dVAR;
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);
959f7ad7 288 HV * const stash = GvSTASH(gv);
146174a9 289
959f7ad7 290 if (GvCVu(gv) && stash && HvENAME(stash))
e1a479c5 291 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
292 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
293 gp->gp_io = newIO();
294 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
295 }
c43ae56f 296 GvGP_set(gv,gp);
5f05dabc
PP
297 }
298 else {
44a8e56a 299 gp_ref(GvGP(gv));
5f05dabc
PP
300 GvINTRO_on(gv);
301 }
79072805 302}
79072805 303
79072805 304AV *
864dbfa3 305Perl_save_ary(pTHX_ GV *gv)
79072805 306{
97aff369 307 dVAR;
901017d6 308 AV * const oav = GvAVn(gv);
67a38de0 309 AV *av;
fb73857a 310
7918f24d
NC
311 PERL_ARGS_ASSERT_SAVE_ARY;
312
67a38de0
NIS
313 if (!AvREAL(oav) && AvREIFY(oav))
314 av_reify(oav);
01433346 315 save_pushptrptr(SvREFCNT_inc_simple_NN(gv), oav, SAVEt_AV);
79072805 316
4608196e 317 GvAV(gv) = NULL;
fb73857a 318 av = GvAVn(gv);
0cbee0a4 319 if (SvMAGIC(oav))
9711599e 320 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 321 return av;
79072805
LW
322}
323
324HV *
864dbfa3 325Perl_save_hash(pTHX_ GV *gv)
79072805 326{
97aff369 327 dVAR;
fb73857a
PP
328 HV *ohv, *hv;
329
7918f24d
NC
330 PERL_ARGS_ASSERT_SAVE_HASH;
331
01433346
FC
332 save_pushptrptr(
333 SvREFCNT_inc_simple_NN(gv), (ohv = GvHVn(gv)), SAVEt_HV
334 );
79072805 335
4608196e 336 GvHV(gv) = NULL;
fb73857a 337 hv = GvHVn(gv);
0cbee0a4 338 if (SvMAGIC(ohv))
9711599e 339 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 340 return hv;
79072805
LW
341}
342
343void
5aaab254 344Perl_save_item(pTHX_ SV *item)
79072805 345{
97aff369 346 dVAR;
eb578fdb 347 SV * const sv = newSVsv(item);
79072805 348
7918f24d
NC
349 PERL_ARGS_ASSERT_SAVE_ITEM;
350
e22024d3
NC
351 save_pushptrptr(item, /* remember the pointer */
352 sv, /* remember the value */
353 SAVEt_ITEM);
79072805
LW
354}
355
356void
1409bc06 357Perl_save_bool(pTHX_ bool *boolp)
79072805 358{
97aff369 359 dVAR;
7918f24d 360
1409bc06 361 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 362
65504245 363 SSCHECK(2);
1409bc06 364 SSPUSHPTR(boolp);
65504245 365 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
366}
367
7623d426
NC
368void
369Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
370{
371 dVAR;
372 SSCHECK(3);
373 SSPUSHINT(i);
374 SSPUSHPTR(ptr);
c6bf6a65 375 SSPUSHUV(type);
79072805
LW
376}
377
378void
1409bc06 379Perl_save_int(pTHX_ int *intp)
9febdf04 380{
97aff369 381 dVAR;
994d373a 382 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 383
1409bc06 384 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 385
994d373a
NC
386 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
387 SSCHECK(2);
388 SSPUSHPTR(intp);
389 SSPUSHUV(SAVEt_INT_SMALL | shifted);
390 } else
391 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
392}
393
394void
58188858
RGS
395Perl_save_I8(pTHX_ I8 *bytep)
396{
397 dVAR;
7918f24d
NC
398
399 PERL_ARGS_ASSERT_SAVE_I8;
400
6c61c2d4
NC
401 SSCHECK(2);
402 SSPUSHPTR(bytep);
403 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
404}
405
406void
87a84751
JH
407Perl_save_I16(pTHX_ I16 *intp)
408{
409 dVAR;
7918f24d
NC
410
411 PERL_ARGS_ASSERT_SAVE_I16;
412
c9441fce
NC
413 SSCHECK(2);
414 SSPUSHPTR(intp);
415 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
416}
417
418void
864dbfa3 419Perl_save_I32(pTHX_ I32 *intp)
79072805 420{
97aff369 421 dVAR;
89abef21 422 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
423
424 PERL_ARGS_ASSERT_SAVE_I32;
425
89abef21
NC
426 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
427 SSCHECK(2);
428 SSPUSHPTR(intp);
429 SSPUSHUV(SAVEt_I32_SMALL | shifted);
430 } else
431 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
432}
433
85e6fe83
LW
434/* Cannot use save_sptr() to store a char* since the SV** cast will
435 * force word-alignment and we'll miss the pointer.
436 */
437void
864dbfa3 438Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 439{
97aff369 440 dVAR;
7918f24d
NC
441
442 PERL_ARGS_ASSERT_SAVE_PPTR;
443
e22024d3 444 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
445}
446
79072805 447void
146174a9
CB
448Perl_save_vptr(pTHX_ void *ptr)
449{
97aff369 450 dVAR;
7918f24d
NC
451
452 PERL_ARGS_ASSERT_SAVE_VPTR;
453
e22024d3 454 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
455}
456
457void
864dbfa3 458Perl_save_sptr(pTHX_ SV **sptr)
79072805 459{
97aff369 460 dVAR;
7918f24d
NC
461
462 PERL_ARGS_ASSERT_SAVE_SPTR;
463
e22024d3 464 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
465}
466
c3564e5c 467void
09edbca0 468Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 469{
97aff369 470 dVAR;
c3564e5c 471 SSCHECK(4);
f3548bdc 472 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 473 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 474 SSPUSHPTR(PL_comppad);
c3564e5c 475 SSPUSHLONG((long)off);
c6bf6a65 476 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
477}
478
79072805 479void
864dbfa3 480Perl_save_hptr(pTHX_ HV **hptr)
79072805 481{
97aff369 482 dVAR;
7918f24d
NC
483
484 PERL_ARGS_ASSERT_SAVE_HPTR;
485
e22024d3 486 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
487}
488
489void
864dbfa3 490Perl_save_aptr(pTHX_ AV **aptr)
79072805 491{
97aff369 492 dVAR;
7918f24d
NC
493
494 PERL_ARGS_ASSERT_SAVE_APTR;
495
e22024d3 496 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
497}
498
499void
2fd8beea 500Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 501{
97aff369 502 dVAR;
8990e307 503 SSCHECK(2);
2fd8beea 504 SSPUSHPTR(ptr);
c6bf6a65 505 SSPUSHUV(type);
8990e307
LW
506}
507
508void
864dbfa3 509Perl_save_clearsv(pTHX_ SV **svp)
8990e307 510{
97aff369 511 dVAR;
cdcdfc56
NC
512 const UV offset = svp - PL_curpad;
513 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
514
515 PERL_ARGS_ASSERT_SAVE_CLEARSV;
516
f3548bdc 517 ASSERT_CURPAD_ACTIVE("save_clearsv");
623e28c6 518 SvPADSTALE_off(*svp); /* mark lexical as active */
cdcdfc56
NC
519 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
520 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
521 offset, svp, PL_curpad);
522
523 SSCHECK(1);
524 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
8990e307
LW
525}
526
527void
864dbfa3 528Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 529{
97aff369 530 dVAR;
7918f24d
NC
531
532 PERL_ARGS_ASSERT_SAVE_DELETE;
533
85a721ca 534 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
535}
536
537void
af097752
VP
538Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
539{
540 STRLEN len;
541 I32 klen;
542 const char *key;
543
544 PERL_ARGS_ASSERT_SAVE_HDELETE;
545
546 key = SvPV_const(keysv, len);
547 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
548 SvREFCNT_inc_simple_void_NN(hv);
549 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
550}
551
552void
c68ec7a9
VP
553Perl_save_adelete(pTHX_ AV *av, I32 key)
554{
555 dVAR;
556
557 PERL_ARGS_ASSERT_SAVE_ADELETE;
558
559 SvREFCNT_inc_void(av);
560 save_pushi32ptr(key, av, SAVEt_ADELETE);
561}
562
563void
12ab1f58
JH
564Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
565{
566 dVAR;
7918f24d
NC
567
568 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
569
12ab1f58
JH
570 SSCHECK(3);
571 SSPUSHDPTR(f);
572 SSPUSHPTR(p);
c6bf6a65 573 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
574}
575
576void
146174a9
CB
577Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
578{
97aff369 579 dVAR;
146174a9
CB
580 SSCHECK(3);
581 SSPUSHDXPTR(f);
582 SSPUSHPTR(p);
c6bf6a65 583 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
584}
585
586void
da8315f8
NC
587Perl_save_hints(pTHX)
588{
589 dVAR;
20439bc7 590 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 591 if (PL_hints & HINT_LOCALIZE_HH) {
52c7aca6
FC
592 HV *oldhh = GvHV(PL_hintgv);
593 save_pushptri32ptr(oldhh, PL_hints, save_cophh, SAVEt_HINTS);
594 GvHV(PL_hintgv) = NULL; /* in case copying dies */
595 GvHV(PL_hintgv) = hv_copy_hints_hv(oldhh);
be84297e 596 } else {
20439bc7 597 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 598 }
be84297e
NC
599}
600
601static void
602S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
603 const int type)
604{
605 SSCHECK(4);
606 SSPUSHPTR(ptr1);
607 SSPUSHINT(i);
608 SSPUSHPTR(ptr2);
c6bf6a65 609 SSPUSHUV(type);
da8315f8
NC
610}
611
612void
91d1c79f 613Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 614{
97aff369 615 dVAR;
bfc4de9f 616 SV *sv;
7918f24d 617
91d1c79f 618 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 619
0cbee0a4 620 SvGETMAGIC(*sptr);
be84297e
NC
621 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
622 SAVEt_AELEM);
1cdc9186
FC
623 /* The array needs to hold a reference count on its new element, so it
624 must be AvREAL. */
5dd42e15 625 if (!AvREAL(av) && AvREIFY(av))
1cdc9186 626 av_reify(av);
91d1c79f 627 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
628 if (flags & SAVEf_KEEPOLDELEM)
629 return;
bfc4de9f
DM
630 sv = *sptr;
631 /* If we're localizing a tied array element, this new sv
632 * won't actually be stored in the array - so it won't get
633 * reaped when the localize ends. Ensure it gets reaped by
634 * mortifying it instead. DAPM */
daeb922a 635 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 636 sv_2mortal(sv);
4e4c362e
GS
637}
638
639void
af7df257 640Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 641{
97aff369 642 dVAR;
bfc4de9f 643 SV *sv;
7918f24d 644
af7df257 645 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 646
0cbee0a4 647 SvGETMAGIC(*sptr);
4e4c362e 648 SSCHECK(4);
b37c2d43 649 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 650 SSPUSHPTR(newSVsv(key));
4e4c362e 651 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 652 SSPUSHUV(SAVEt_HELEM);
af7df257 653 save_scalar_at(sptr, flags);
75d34a09
VP
654 if (flags & SAVEf_KEEPOLDELEM)
655 return;
bfc4de9f
DM
656 sv = *sptr;
657 /* If we're localizing a tied hash element, this new sv
658 * won't actually be stored in the hash - so it won't get
659 * reaped when the localize ends. Ensure it gets reaped by
660 * mortifying it instead. DAPM */
daeb922a 661 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 662 sv_2mortal(sv);
4e4c362e
GS
663}
664
2053acbf
NC
665SV*
666Perl_save_svref(pTHX_ SV **sptr)
667{
668 dVAR;
7918f24d
NC
669
670 PERL_ARGS_ASSERT_SAVE_SVREF;
671
2053acbf 672 SvGETMAGIC(*sptr);
e22024d3 673 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 674 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
675}
676
455ece5e 677I32
864dbfa3 678Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 679{
97aff369 680 dVAR;
eb578fdb
KW
681 const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
682 - (char*)PL_savestack);
1be36ce0
NC
683 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
684 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 685
1be36ce0
NC
686 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
687 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
688 elems, size, pad);
689
690 SSGROW(elems + 1);
455ece5e
AD
691
692 PL_savestack_ix += elems;
1be36ce0 693 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
694 return start;
695}
696
462e5cf6 697void
864dbfa3 698Perl_leave_scope(pTHX_ I32 base)
79072805 699{
97aff369 700 dVAR;
eb578fdb
KW
701 SV *sv;
702 SV *value;
703 GV *gv;
704 AV *av;
705 HV *hv;
20454177 706 void* ptr;
eb578fdb 707 char* str;
161b7d16 708 I32 i;
302c0c93 709 /* Localise the effects of the TAINT_NOT inside the loop. */
284167a5 710 bool was = TAINT_get;
79072805
LW
711
712 if (base < -1)
5637ef5b 713 Perl_croak(aTHX_ "panic: corrupt saved stack index %ld", (long) base);
1c98cc53
DM
714 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
715 (long)PL_savestack_ix, (long)base));
3280af22 716 while (PL_savestack_ix > base) {
c6bf6a65
NC
717 UV uv = SSPOPUV;
718 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
719 TAINT_NOT;
720
c6bf6a65 721 switch (type) {
79072805 722 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
723 value = MUTABLE_SV(SSPOPPTR);
724 sv = MUTABLE_SV(SSPOPPTR);
79072805 725 sv_replace(sv,value);
3280af22 726 PL_localizing = 2;
79072805 727 SvSETMAGIC(sv);
3280af22 728 PL_localizing = 0;
79072805 729 break;
8aacddc1 730 case SAVEt_SV: /* scalar reference */
ad64d0ec 731 value = MUTABLE_SV(SSPOPPTR);
159b6efe 732 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 733 ptr = &GvSV(gv);
502c6561 734 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
735 restore_sv:
736 sv = *(SV**)ptr;
2053acbf
NC
737 *(SV**)ptr = value;
738 SvREFCNT_dec(sv);
739 PL_localizing = 2;
740 SvSETMAGIC(value);
741 PL_localizing = 0;
742 SvREFCNT_dec(value);
9bfbb681 743 SvREFCNT_dec(av); /* av may actually be an AV, HV or GV */
2053acbf 744 break;
8aacddc1 745 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 746 ptr = SSPOPPTR;
b03d03b0 747 str = (char*)SSPOPPTR;
f4dd75d9
GS
748 if (*(char**)ptr != str) {
749 Safefree(*(char**)ptr);
750 *(char**)ptr = str;
751 }
752 break;
05ec9bb3
NIS
753 case SAVEt_SHARED_PVREF: /* shared pv */
754 str = (char*)SSPOPPTR;
755 ptr = SSPOPPTR;
756 if (*(char**)ptr != str) {
5e54c26f 757#ifdef NETWARE
9ecbcc42 758 PerlMem_free(*(char**)ptr);
5e54c26f 759#else
05ec9bb3 760 PerlMemShared_free(*(char**)ptr);
5e54c26f 761#endif
05ec9bb3
NIS
762 *(char**)ptr = str;
763 }
764 break;
f83b46a0
DM
765 case SAVEt_GVSV: /* scalar slot in GV */
766 value = MUTABLE_SV(SSPOPPTR);
767 gv = MUTABLE_GV(SSPOPPTR);
768 ptr = &GvSV(gv);
769 goto restore_svp;
8aacddc1 770 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 771 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 772 ptr = SSPOPPTR;
f83b46a0 773 restore_svp:
f4dd75d9
GS
774 sv = *(SV**)ptr;
775 *(SV**)ptr = value;
776 SvREFCNT_dec(sv);
b9d12d37
GS
777 SvREFCNT_dec(value);
778 break;
8aacddc1 779 case SAVEt_AV: /* array reference */
502c6561 780 av = MUTABLE_AV(SSPOPPTR);
159b6efe 781 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 782 SvREFCNT_dec(GvAV(gv));
8aacddc1 783 GvAV(gv) = av;
fb73857a 784 if (SvMAGICAL(av)) {
3280af22 785 PL_localizing = 2;
ad64d0ec 786 SvSETMAGIC(MUTABLE_SV(av));
3280af22 787 PL_localizing = 0;
fb73857a 788 }
01433346 789 SvREFCNT_dec(gv);
8aacddc1
NIS
790 break;
791 case SAVEt_HV: /* hash reference */
85fbaab2 792 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 793 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 794 SvREFCNT_dec(GvHV(gv));
8aacddc1 795 GvHV(gv) = hv;
fb73857a 796 if (SvMAGICAL(hv)) {
3280af22 797 PL_localizing = 2;
ad64d0ec 798 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 799 PL_localizing = 0;
fb73857a 800 }
01433346 801 SvREFCNT_dec(gv);
8aacddc1 802 break;
994d373a
NC
803 case SAVEt_INT_SMALL:
804 ptr = SSPOPPTR;
805 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
806 break;
79072805
LW
807 case SAVEt_INT: /* int reference */
808 ptr = SSPOPPTR;
809 *(int*)ptr = (int)SSPOPINT;
810 break;
9febdf04
RH
811 case SAVEt_BOOL: /* bool reference */
812 ptr = SSPOPPTR;
65504245 813 *(bool*)ptr = cBOOL(uv >> 8);
284167a5 814#if !NO_TAINT_SUPPORT
173c3f27 815 if (ptr == &(TAINT_get)) {
b6f93e7a
KW
816 /* If we don't update <was>, to reflect what was saved on the
817 * stack for PL_tainted, then we will overwrite this attempt to
818 * restore it when we exit this routine. Note that this won't
819 * work if this value was saved in a wider-than necessary type,
820 * such as I32 */
821 was = *(bool*)ptr;
822 }
284167a5 823#endif
9febdf04 824 break;
89abef21
NC
825 case SAVEt_I32_SMALL:
826 ptr = SSPOPPTR;
827 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
828 break;
79072805
LW
829 case SAVEt_I32: /* I32 reference */
830 ptr = SSPOPPTR;
3235b7a3
NC
831#ifdef PERL_DEBUG_READONLY_OPS
832 {
833 const I32 val = SSPOPINT;
834 if (*(I32*)ptr != val)
835 *(I32*)ptr = val;
836 }
837#else
79072805 838 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 839#endif
79072805
LW
840 break;
841 case SAVEt_SPTR: /* SV* reference */
842 ptr = SSPOPPTR;
ad64d0ec 843 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 844 break;
146174a9 845 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
846 case SAVEt_PPTR: /* char* reference */
847 ptr = SSPOPPTR;
848 *(char**)ptr = (char*)SSPOPPTR;
849 break;
79072805
LW
850 case SAVEt_HPTR: /* HV* reference */
851 ptr = SSPOPPTR;
85fbaab2 852 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
853 break;
854 case SAVEt_APTR: /* AV* reference */
855 ptr = SSPOPPTR;
502c6561 856 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 857 break;
fb73857a 858 case SAVEt_GP: /* scalar reference */
10507e11 859 ptr = SSPOPPTR;
159b6efe 860 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 861 gp_free(gv);
c43ae56f 862 GvGP_set(gv, (GP*)ptr);
dd69841b 863 /* putting a method back into circulation ("local")*/
00169e2c 864 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvENAME_get(hv))
978a498e 865 gv_method_changed(gv);
4633a7c4 866 SvREFCNT_dec(gv);
8aacddc1 867 break;
8990e307
LW
868 case SAVEt_FREESV:
869 ptr = SSPOPPTR;
ad64d0ec 870 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 871 break;
3987a177
Z
872 case SAVEt_FREECOPHH:
873 ptr = SSPOPPTR;
874 cophh_free((COPHH *)ptr);
875 break;
26d9b02f
JH
876 case SAVEt_MORTALIZESV:
877 ptr = SSPOPPTR;
ad64d0ec 878 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 879 break;
8990e307
LW
880 case SAVEt_FREEOP:
881 ptr = SSPOPPTR;
5e5ba94b 882 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP");
8990e307
LW
883 op_free((OP*)ptr);
884 break;
885 case SAVEt_FREEPV:
886 ptr = SSPOPPTR;
1df70142 887 Safefree(ptr);
8990e307 888 break;
4e09461c
DM
889
890 {
891 SV **svp;
892 case SAVEt_CLEARPADRANGE:
893 i = (I32)((uv >> SAVE_TIGHT_SHIFT) & OPpPADRANGE_COUNTMASK);
894 svp = &PL_curpad[uv >>
895 (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)] + i - 1;
896 goto clearsv;
8990e307 897 case SAVEt_CLEARSV:
4e09461c
DM
898 svp = &PL_curpad[uv >> SAVE_TIGHT_SHIFT];
899 i = 1;
900 clearsv:
901 for (; i; i--, svp--) {
528ad060
DM
902 sv = *svp;
903
904 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
905 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
906 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
907 (long)(svp-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
908 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
909 ));
910
911 /* Can clear pad variable in place? */
912 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
913 /*
914 * if a my variable that was made readonly is going out of
915 * scope, we want to remove the readonlyness so that it can
916 * go out of scope quietly
917 */
918 if (SvPADMY(sv) && !SvFAKE(sv))
919 SvREADONLY_off(sv);
920
921 if (SvTHINKFIRST(sv))
922 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF
923 |SV_COW_DROP_PV);
924 if (SvTYPE(sv) == SVt_PVHV)
925 Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv));
926 if (SvMAGICAL(sv))
927 {
928 sv_unmagic(sv, PERL_MAGIC_backref);
929 if (SvTYPE(sv) != SVt_PVCV)
930 mg_free(sv);
931 }
932
933 switch (SvTYPE(sv)) {
934 case SVt_NULL:
935 break;
936 case SVt_PVAV:
937 av_clear(MUTABLE_AV(sv));
938 break;
939 case SVt_PVHV:
940 hv_clear(MUTABLE_HV(sv));
941 break;
942 case SVt_PVCV:
943 {
944 HEK * const hek = CvNAME_HEK((CV *)sv);
945 assert(hek);
946 share_hek_hek(hek);
947 cv_undef((CV *)sv);
948 CvNAME_HEK_set(sv, hek);
949 break;
950 }
951 default:
952 SvOK_off(sv);
953 break;
954 }
955 SvPADSTALE_on(sv); /* mark as no longer live */
956 }
957 else { /* Someone has a claim on this, so abandon it. */
958 assert( SvFLAGS(sv) & SVs_PADMY);
959 assert(!(SvFLAGS(sv) & SVs_PADTMP));
960 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
961 case SVt_PVAV: *svp = MUTABLE_SV(newAV()); break;
962 case SVt_PVHV: *svp = MUTABLE_SV(newHV()); break;
963 case SVt_PVCV:
964 {
965 /* Create a stub */
966 *svp = newSV_type(SVt_PVCV);
967
968 /* Share name */
969 assert(CvNAMED(sv));
970 CvNAME_HEK_set(*svp,
971 share_hek_hek(CvNAME_HEK((CV *)sv)));
972 break;
973 }
974 default: *svp = newSV(0); break;
975 }
976 SvREFCNT_dec(sv); /* Cast current value to the winds. */
977 /* preserve pad nature, but also mark as not live
978 * for any closure capturing */
979 SvFLAGS(*svp) |= (SVs_PADMY|SVs_PADSTALE);
980 }
4e09461c 981 }
8990e307 982 break;
4e09461c 983 }
8990e307
LW
984 case SAVEt_DELETE:
985 ptr = SSPOPPTR;
85fbaab2 986 hv = MUTABLE_HV(ptr);
35d4f826 987 i = SSPOPINT;
8990e307 988 ptr = SSPOPPTR;
35d4f826 989 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 990 SvREFCNT_dec(hv);
8aacddc1 991 Safefree(ptr);
8990e307 992 break;
c68ec7a9
VP
993 case SAVEt_ADELETE:
994 ptr = SSPOPPTR;
995 av = MUTABLE_AV(ptr);
996 i = SSPOPINT;
997 (void)av_delete(av, i, G_DISCARD);
998 SvREFCNT_dec(av);
999 break;
146174a9
CB
1000 case SAVEt_DESTRUCTOR_X:
1001 ptr = SSPOPPTR;
acfe0abc 1002 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
1003 break;
1004 case SAVEt_REGCONTEXT:
e0fa7e2b 1005 /* regexp must have croaked */
455ece5e 1006 case SAVEt_ALLOC:
1be36ce0 1007 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 1008 break;
55497cff 1009 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 1010 i = SSPOPINT;
3280af22 1011 PL_stack_sp = PL_stack_base + i;
55497cff 1012 break;
ea8d6ae1
DB
1013 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
1014 i = SSPOPINT;
1015 cxstack[i].blk_oldsp = SSPOPINT;
1016 break;
161b7d16 1017 case SAVEt_AELEM: /* array element */
ad64d0ec 1018 value = MUTABLE_SV(SSPOPPTR);
161b7d16 1019 i = SSPOPINT;
502c6561 1020 av = MUTABLE_AV(SSPOPPTR);
658aef79 1021 ptr = av_fetch(av,i,1);
5dd42e15
DM
1022 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
1023 SvREFCNT_dec(value);
4e4c362e
GS
1024 if (ptr) {
1025 sv = *(SV**)ptr;
3280af22 1026 if (sv && sv != &PL_sv_undef) {
ad64d0ec 1027 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 1028 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
1029 goto restore_sv;
1030 }
1031 }
1032 SvREFCNT_dec(av);
1033 SvREFCNT_dec(value);
1034 break;
161b7d16 1035 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
1036 value = MUTABLE_SV(SSPOPPTR);
1037 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 1038 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 1039 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 1040 SvREFCNT_dec(sv);
4e4c362e 1041 if (ptr) {
35a4481c 1042 const SV * const oval = HeVAL((HE*)ptr);
3280af22 1043 if (oval && oval != &PL_sv_undef) {
4e4c362e 1044 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1045 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1046 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1047 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1048 goto restore_sv;
1049 }
1050 }
1051 SvREFCNT_dec(hv);
4e4c362e
GS
1052 SvREFCNT_dec(value);
1053 break;
462e5cf6 1054 case SAVEt_OP:
533c011a 1055 PL_op = (OP*)SSPOPPTR;
462e5cf6 1056 break;
25eaa213 1057 case SAVEt_HINTS:
3607ca02
FC
1058 if ((PL_hints & HINT_LOCALIZE_HH)) {
1059 while (GvHV(PL_hintgv)) {
2653c1e3 1060 HV *hv = GvHV(PL_hintgv);
045ac317 1061 GvHV(PL_hintgv) = NULL;
2653c1e3 1062 SvREFCNT_dec(MUTABLE_SV(hv));
3607ca02 1063 }
045ac317 1064 }
20439bc7
Z
1065 cophh_free(CopHINTHASH_get(&PL_compiling));
1066 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1067 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1068 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1069 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1070 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
2653c1e3
DM
1071 }
1072 if (!GvHV(PL_hintgv)) {
a3fb8386
FC
1073 /* Need to add a new one manually, else rv2hv can
1074 add one via GvHVn and it won't have the magic set. */
5b9c0671
NC
1075 HV *const hv = newHV();
1076 hv_magic(hv, NULL, PERL_MAGIC_hints);
1077 GvHV(PL_hintgv) = hv;
dfa41748 1078 }
5b9c0671 1079 assert(GvHV(PL_hintgv));
b3ac6de7 1080 break;
cb50131a 1081 case SAVEt_COMPPAD:
f3548bdc 1082 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1083 if (PL_comppad)
cb50131a
CB
1084 PL_curpad = AvARRAY(PL_comppad);
1085 else
4608196e 1086 PL_curpad = NULL;
cb50131a 1087 break;
09edbca0 1088 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1089 {
35a4481c 1090 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1091 SV **svp;
c3564e5c 1092 ptr = SSPOPPTR;
09edbca0
NC
1093 assert (ptr);
1094 svp = AvARRAY((PAD*)ptr) + off;
1095 /* This mortalizing used to be done by POPLOOP() via itersave.
1096 But as we have all the information here, we can do it here,
1097 save even having to have itersave in the struct. */
1098 sv_2mortal(*svp);
ad64d0ec 1099 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1100 }
1101 break;
8b7059b1
DM
1102 case SAVEt_SAVESWITCHSTACK:
1103 {
1104 dSP;
502c6561
NC
1105 AV *const t = MUTABLE_AV(SSPOPPTR);
1106 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1107 SWITCHSTACK(t,f);
1108 PL_curstackinfo->si_stack = f;
1109 }
1110 break;
14f338dc
DM
1111 case SAVEt_SET_SVFLAGS:
1112 {
35a4481c
AL
1113 const U32 val = (U32)SSPOPINT;
1114 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1115 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1116 SvFLAGS(sv) &= ~mask;
1117 SvFLAGS(sv) |= val;
1118 }
1119 break;
95e06916
NC
1120
1121 /* This would be a mathom, but Perl_save_svref() calls a static
1122 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1123 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1124 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1125 ptr = SSPOPPTR;
1126 av = NULL; /* what to refcnt_dec */
1127 goto restore_sv;
95e06916
NC
1128
1129 /* These are only saved in mathoms.c */
1130 case SAVEt_NSTAB:
159b6efe 1131 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1132 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1133 break;
2053acbf
NC
1134 case SAVEt_LONG: /* long reference */
1135 ptr = SSPOPPTR;
1136 *(long*)ptr = (long)SSPOPLONG;
1137 break;
95e06916
NC
1138 case SAVEt_IV: /* IV reference */
1139 ptr = SSPOPPTR;
1140 *(IV*)ptr = (IV)SSPOPIV;
1141 break;
1142
2053acbf
NC
1143 case SAVEt_I16: /* I16 reference */
1144 ptr = SSPOPPTR;
c9441fce 1145 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1146 break;
1147 case SAVEt_I8: /* I8 reference */
1148 ptr = SSPOPPTR;
6c61c2d4 1149 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1150 break;
2053acbf
NC
1151 case SAVEt_DESTRUCTOR:
1152 ptr = SSPOPPTR;
1153 (*SSPOPDPTR)(ptr);
1154 break;
68da3b2f
NC
1155 case SAVEt_COMPILE_WARNINGS:
1156 ptr = SSPOPPTR;
72dc9ed5 1157
68da3b2f
NC
1158 if (!specialWARN(PL_compiling.cop_warnings))
1159 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1160
10edeb5d 1161 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1162 break;
1ade1aa1
NC
1163 case SAVEt_RE_STATE:
1164 {
1165 const struct re_save_state *const state
1166 = (struct re_save_state *)
1167 (PL_savestack + PL_savestack_ix
1168 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1169 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1170
1ade1aa1
NC
1171 if (PL_reg_poscache != state->re_state_reg_poscache) {
1172 Safefree(PL_reg_poscache);
1ade1aa1 1173 }
46ab3289 1174 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1175 }
1176 break;
7c197c94
DM
1177 case SAVEt_PARSER:
1178 ptr = SSPOPPTR;
1179 parser_free((yy_parser *) ptr);
1180 break;
79072805 1181 default:
5637ef5b 1182 Perl_croak(aTHX_ "panic: leave_scope inconsistency %u", type);
79072805
LW
1183 }
1184 }
302c0c93 1185
284167a5 1186 TAINT_set(was);
f410a211
NC
1187
1188 PERL_ASYNC_CHECK();
79072805 1189}
8990e307 1190
8990e307 1191void
864dbfa3 1192Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1193{
97aff369 1194 dVAR;
7918f24d
NC
1195
1196 PERL_ARGS_ASSERT_CX_DUMP;
1197
35ff7856 1198#ifdef DEBUGGING
22c35a8c 1199 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1200 if (CxTYPE(cx) != CXt_SUBST) {
e8d9e9d0 1201 const char *gimme_text;
760ac839 1202 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1203 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1204 PTR2UV(cx->blk_oldcop));
760ac839
LW
1205 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1206 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1207 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1208 PTR2UV(cx->blk_oldpm));
e8d9e9d0
VP
1209 switch (cx->blk_gimme) {
1210 case G_VOID:
1211 gimme_text = "VOID";
1212 break;
1213 case G_SCALAR:
1214 gimme_text = "SCALAR";
1215 break;
1216 case G_ARRAY:
1217 gimme_text = "LIST";
1218 break;
1219 default:
1220 gimme_text = "UNKNOWN";
1221 break;
1222 }
1223 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", gimme_text);
8990e307 1224 }
6b35e009 1225 switch (CxTYPE(cx)) {
8990e307
LW
1226 case CXt_NULL:
1227 case CXt_BLOCK:
1228 break;
146174a9 1229 case CXt_FORMAT:
f9c764c5
NC
1230 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1231 PTR2UV(cx->blk_format.cv));
1232 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1233 PTR2UV(cx->blk_format.gv));
1234 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1235 PTR2UV(cx->blk_format.dfoutgv));
1236 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1237 (int)CxHASARGS(cx));
f9c764c5
NC
1238 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1239 PTR2UV(cx->blk_format.retop));
146174a9 1240 break;
8990e307 1241 case CXt_SUB:
146174a9
CB
1242 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1243 PTR2UV(cx->blk_sub.cv));
760ac839 1244 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1245 (long)cx->blk_sub.olddepth);
760ac839 1246 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1247 (int)CxHASARGS(cx));
1248 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1249 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1250 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1251 break;
1252 case CXt_EVAL:
760ac839 1253 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1254 (long)CxOLD_IN_EVAL(cx));
760ac839 1255 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1256 PL_op_name[CxOLD_OP_TYPE(cx)],
1257 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1258 if (cx->blk_eval.old_namesv)
1259 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1260 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1261 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1262 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1263 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1264 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1265 break;
1266
c6fdafd0 1267 case CXt_LOOP_LAZYIV:
d01136d6 1268 case CXt_LOOP_LAZYSV:
3b719c58
NC
1269 case CXt_LOOP_FOR:
1270 case CXt_LOOP_PLAIN:
0cbdab38 1271 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1272 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1273 (long)cx->blk_loop.resetsp);
022eaa24
NC
1274 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1275 PTR2UV(cx->blk_loop.my_op));
d01136d6 1276 /* XXX: not accurate for LAZYSV/IV */
146174a9 1277 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1278 PTR2UV(cx->blk_loop.state_u.ary.ary));
1279 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1280 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1281 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1282 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1283 break;
1284
1285 case CXt_SUBST:
760ac839 1286 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1287 (long)cx->sb_iters);
760ac839 1288 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1289 (long)cx->sb_maxiters);
35ef4773
GS
1290 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1291 (long)cx->sb_rflags);
760ac839 1292 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1293 (long)CxONCE(cx));
760ac839 1294 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1295 cx->sb_orig);
146174a9
CB
1296 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1297 PTR2UV(cx->sb_dstr));
1298 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1299 PTR2UV(cx->sb_targ));
1300 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1301 PTR2UV(cx->sb_s));
1302 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1303 PTR2UV(cx->sb_m));
1304 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1305 PTR2UV(cx->sb_strend));
1306 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1307 PTR2UV(cx->sb_rxres));
8990e307
LW
1308 break;
1309 }
65e66c80 1310#else
96a5add6 1311 PERL_UNUSED_CONTEXT;
65e66c80 1312 PERL_UNUSED_ARG(cx);
17c3b450 1313#endif /* DEBUGGING */
35ff7856 1314}
241d1a3b
NC
1315
1316/*
1317 * Local variables:
1318 * c-indentation-style: bsd
1319 * c-basic-offset: 4
14d04a33 1320 * indent-tabs-mode: nil
241d1a3b
NC
1321 * End:
1322 *
14d04a33 1323 * ex: set ts=8 sts=4 sw=4 et:
37442d52 1324 */