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[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)) {
a0d0e21e 186 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 187 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
a0d0e21e 188 }
75d34a09 189 if (!(flags & SAVEf_KEEPOLDELEM))
2dcac756 190 mg_localize(osv, sv, cBOOL(flags & SAVEf_SETMAGIC));
79072805 191 }
75d34a09 192
79072805
LW
193 return sv;
194}
195
dfcd3de5
NC
196void
197Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
198{
199 dVAR;
200 SSCHECK(3);
201 SSPUSHPTR(ptr1);
202 SSPUSHPTR(ptr2);
c6bf6a65 203 SSPUSHUV(type);
e22024d3
NC
204}
205
7a4c00b4 206SV *
864dbfa3 207Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 208{
97aff369 209 dVAR;
fb4fc1fa 210 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
211
212 PERL_ARGS_ASSERT_SAVE_SCALAR;
213
27cc343c 214 PL_localizing = 1;
0cbee0a4 215 SvGETMAGIC(*sptr);
27cc343c 216 PL_localizing = 0;
e22024d3 217 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 218 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
219}
220
f4dd75d9 221/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
222 * restore a global SV to its prior contents, freeing new value. */
223void
864dbfa3 224Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 225{
97aff369 226 dVAR;
7918f24d
NC
227
228 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
229
e22024d3 230 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
231}
232
f4dd75d9
GS
233/* Like save_pptr(), but also Safefree()s the new value if it is different
234 * from the old one. Can be used to restore a global char* to its prior
235 * contents, freeing new value. */
236void
237Perl_save_generic_pvref(pTHX_ char **str)
238{
97aff369 239 dVAR;
7918f24d
NC
240
241 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
242
e22024d3 243 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
244}
245
05ec9bb3
NIS
246/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
247 * Can be used to restore a shared global char* to its prior
248 * contents, freeing new value. */
249void
250Perl_save_shared_pvref(pTHX_ char **str)
251{
97aff369 252 dVAR;
7918f24d
NC
253
254 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
255
e22024d3 256 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
257}
258
14f338dc
DM
259/* set the SvFLAGS specified by mask to the values in val */
260
261void
262Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
263{
97aff369 264 dVAR;
7918f24d
NC
265
266 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
267
14f338dc
DM
268 SSCHECK(4);
269 SSPUSHPTR(sv);
270 SSPUSHINT(mask);
271 SSPUSHINT(val);
c6bf6a65 272 SSPUSHUV(SAVEt_SET_SVFLAGS);
14f338dc
DM
273}
274
79072805 275void
864dbfa3 276Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 277{
97aff369 278 dVAR;
7918f24d
NC
279
280 PERL_ARGS_ASSERT_SAVE_GP;
281
10507e11 282 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 283
5f05dabc 284 if (empty) {
12816592 285 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 286
fae75791 287 if (GvCVu(gv))
e1a479c5 288 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
289 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
290 gp->gp_io = newIO();
291 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
292 }
72651472
NC
293#ifdef PERL_DONT_CREATE_GVSV
294 if (gv == PL_errgv) {
295 /* We could scatter this logic everywhere by changing the
296 definition of ERRSV from GvSV() to GvSVn(), but it seems more
297 efficient to do this check once here. */
298 gp->gp_sv = newSV(0);
299 }
300#endif
c43ae56f 301 GvGP_set(gv,gp);
5f05dabc
PP
302 }
303 else {
44a8e56a 304 gp_ref(GvGP(gv));
5f05dabc
PP
305 GvINTRO_on(gv);
306 }
79072805 307}
79072805 308
79072805 309AV *
864dbfa3 310Perl_save_ary(pTHX_ GV *gv)
79072805 311{
97aff369 312 dVAR;
901017d6 313 AV * const oav = GvAVn(gv);
67a38de0 314 AV *av;
fb73857a 315
7918f24d
NC
316 PERL_ARGS_ASSERT_SAVE_ARY;
317
67a38de0
NIS
318 if (!AvREAL(oav) && AvREIFY(oav))
319 av_reify(oav);
e22024d3 320 save_pushptrptr(gv, oav, SAVEt_AV);
79072805 321
4608196e 322 GvAV(gv) = NULL;
fb73857a 323 av = GvAVn(gv);
0cbee0a4 324 if (SvMAGIC(oav))
9711599e 325 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 326 return av;
79072805
LW
327}
328
329HV *
864dbfa3 330Perl_save_hash(pTHX_ GV *gv)
79072805 331{
97aff369 332 dVAR;
fb73857a
PP
333 HV *ohv, *hv;
334
7918f24d
NC
335 PERL_ARGS_ASSERT_SAVE_HASH;
336
e22024d3 337 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
79072805 338
4608196e 339 GvHV(gv) = NULL;
fb73857a 340 hv = GvHVn(gv);
0cbee0a4 341 if (SvMAGIC(ohv))
9711599e 342 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 343 return hv;
79072805
LW
344}
345
346void
864dbfa3 347Perl_save_item(pTHX_ register SV *item)
79072805 348{
97aff369 349 dVAR;
901017d6 350 register SV * const sv = newSVsv(item);
79072805 351
7918f24d
NC
352 PERL_ARGS_ASSERT_SAVE_ITEM;
353
e22024d3
NC
354 save_pushptrptr(item, /* remember the pointer */
355 sv, /* remember the value */
356 SAVEt_ITEM);
79072805
LW
357}
358
359void
1409bc06 360Perl_save_bool(pTHX_ bool *boolp)
79072805 361{
97aff369 362 dVAR;
7918f24d 363
1409bc06 364 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 365
65504245 366 SSCHECK(2);
1409bc06 367 SSPUSHPTR(boolp);
65504245 368 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
369}
370
7623d426
NC
371void
372Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
373{
374 dVAR;
375 SSCHECK(3);
376 SSPUSHINT(i);
377 SSPUSHPTR(ptr);
c6bf6a65 378 SSPUSHUV(type);
79072805
LW
379}
380
381void
1409bc06 382Perl_save_int(pTHX_ int *intp)
9febdf04 383{
97aff369 384 dVAR;
994d373a 385 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 386
1409bc06 387 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 388
994d373a
NC
389 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
390 SSCHECK(2);
391 SSPUSHPTR(intp);
392 SSPUSHUV(SAVEt_INT_SMALL | shifted);
393 } else
394 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
395}
396
397void
58188858
RGS
398Perl_save_I8(pTHX_ I8 *bytep)
399{
400 dVAR;
7918f24d
NC
401
402 PERL_ARGS_ASSERT_SAVE_I8;
403
6c61c2d4
NC
404 SSCHECK(2);
405 SSPUSHPTR(bytep);
406 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
407}
408
409void
87a84751
JH
410Perl_save_I16(pTHX_ I16 *intp)
411{
412 dVAR;
7918f24d
NC
413
414 PERL_ARGS_ASSERT_SAVE_I16;
415
c9441fce
NC
416 SSCHECK(2);
417 SSPUSHPTR(intp);
418 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
419}
420
421void
864dbfa3 422Perl_save_I32(pTHX_ I32 *intp)
79072805 423{
97aff369 424 dVAR;
89abef21 425 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
426
427 PERL_ARGS_ASSERT_SAVE_I32;
428
89abef21
NC
429 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
430 SSCHECK(2);
431 SSPUSHPTR(intp);
432 SSPUSHUV(SAVEt_I32_SMALL | shifted);
433 } else
434 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
435}
436
85e6fe83
LW
437/* Cannot use save_sptr() to store a char* since the SV** cast will
438 * force word-alignment and we'll miss the pointer.
439 */
440void
864dbfa3 441Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 442{
97aff369 443 dVAR;
7918f24d
NC
444
445 PERL_ARGS_ASSERT_SAVE_PPTR;
446
e22024d3 447 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
448}
449
79072805 450void
146174a9
CB
451Perl_save_vptr(pTHX_ void *ptr)
452{
97aff369 453 dVAR;
7918f24d
NC
454
455 PERL_ARGS_ASSERT_SAVE_VPTR;
456
e22024d3 457 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
458}
459
460void
864dbfa3 461Perl_save_sptr(pTHX_ SV **sptr)
79072805 462{
97aff369 463 dVAR;
7918f24d
NC
464
465 PERL_ARGS_ASSERT_SAVE_SPTR;
466
e22024d3 467 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
468}
469
c3564e5c 470void
09edbca0 471Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 472{
97aff369 473 dVAR;
c3564e5c 474 SSCHECK(4);
f3548bdc 475 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 476 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 477 SSPUSHPTR(PL_comppad);
c3564e5c 478 SSPUSHLONG((long)off);
c6bf6a65 479 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
480}
481
79072805 482void
864dbfa3 483Perl_save_hptr(pTHX_ HV **hptr)
79072805 484{
97aff369 485 dVAR;
7918f24d
NC
486
487 PERL_ARGS_ASSERT_SAVE_HPTR;
488
e22024d3 489 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
490}
491
492void
864dbfa3 493Perl_save_aptr(pTHX_ AV **aptr)
79072805 494{
97aff369 495 dVAR;
7918f24d
NC
496
497 PERL_ARGS_ASSERT_SAVE_APTR;
498
e22024d3 499 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
500}
501
502void
2fd8beea 503Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 504{
97aff369 505 dVAR;
8990e307 506 SSCHECK(2);
2fd8beea 507 SSPUSHPTR(ptr);
c6bf6a65 508 SSPUSHUV(type);
8990e307
LW
509}
510
511void
864dbfa3 512Perl_save_clearsv(pTHX_ SV **svp)
8990e307 513{
97aff369 514 dVAR;
cdcdfc56
NC
515 const UV offset = svp - PL_curpad;
516 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
517
518 PERL_ARGS_ASSERT_SAVE_CLEARSV;
519
f3548bdc 520 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
521 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
522 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
523 offset, svp, PL_curpad);
524
525 SSCHECK(1);
526 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 527 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
528}
529
530void
864dbfa3 531Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 532{
97aff369 533 dVAR;
7918f24d
NC
534
535 PERL_ARGS_ASSERT_SAVE_DELETE;
536
85a721ca 537 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
538}
539
540void
af097752
VP
541Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
542{
543 STRLEN len;
544 I32 klen;
545 const char *key;
546
547 PERL_ARGS_ASSERT_SAVE_HDELETE;
548
549 key = SvPV_const(keysv, len);
550 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
551 SvREFCNT_inc_simple_void_NN(hv);
552 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
553}
554
555void
c68ec7a9
VP
556Perl_save_adelete(pTHX_ AV *av, I32 key)
557{
558 dVAR;
559
560 PERL_ARGS_ASSERT_SAVE_ADELETE;
561
562 SvREFCNT_inc_void(av);
563 save_pushi32ptr(key, av, SAVEt_ADELETE);
564}
565
566void
12ab1f58
JH
567Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
568{
569 dVAR;
7918f24d
NC
570
571 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
572
12ab1f58
JH
573 SSCHECK(3);
574 SSPUSHDPTR(f);
575 SSPUSHPTR(p);
c6bf6a65 576 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
577}
578
579void
146174a9
CB
580Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
581{
97aff369 582 dVAR;
146174a9
CB
583 SSCHECK(3);
584 SSPUSHDXPTR(f);
585 SSPUSHPTR(p);
c6bf6a65 586 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
587}
588
589void
da8315f8
NC
590Perl_save_hints(pTHX)
591{
592 dVAR;
20439bc7 593 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 594 if (PL_hints & HINT_LOCALIZE_HH) {
20439bc7 595 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints, save_cophh, SAVEt_HINTS);
defdfed5 596 GvHV(PL_hintgv) = hv_copy_hints_hv(GvHV(PL_hintgv));
be84297e 597 } else {
20439bc7 598 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 599 }
be84297e
NC
600}
601
602static void
603S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
604 const int type)
605{
606 SSCHECK(4);
607 SSPUSHPTR(ptr1);
608 SSPUSHINT(i);
609 SSPUSHPTR(ptr2);
c6bf6a65 610 SSPUSHUV(type);
da8315f8
NC
611}
612
613void
91d1c79f 614Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 615{
97aff369 616 dVAR;
bfc4de9f 617 SV *sv;
7918f24d 618
91d1c79f 619 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 620
0cbee0a4 621 SvGETMAGIC(*sptr);
be84297e
NC
622 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
623 SAVEt_AELEM);
5dd42e15
DM
624 /* if it gets reified later, the restore will have the wrong refcnt */
625 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 626 SvREFCNT_inc_void(*sptr);
91d1c79f 627 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
628 if (flags & SAVEf_KEEPOLDELEM)
629 return;
bfc4de9f
DM
630 sv = *sptr;
631 /* If we're localizing a tied array element, this new sv
632 * won't actually be stored in the array - so it won't get
633 * reaped when the localize ends. Ensure it gets reaped by
634 * mortifying it instead. DAPM */
daeb922a 635 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 636 sv_2mortal(sv);
4e4c362e
GS
637}
638
639void
af7df257 640Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 641{
97aff369 642 dVAR;
bfc4de9f 643 SV *sv;
7918f24d 644
af7df257 645 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 646
0cbee0a4 647 SvGETMAGIC(*sptr);
4e4c362e 648 SSCHECK(4);
b37c2d43 649 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 650 SSPUSHPTR(newSVsv(key));
4e4c362e 651 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 652 SSPUSHUV(SAVEt_HELEM);
af7df257 653 save_scalar_at(sptr, flags);
75d34a09
VP
654 if (flags & SAVEf_KEEPOLDELEM)
655 return;
bfc4de9f
DM
656 sv = *sptr;
657 /* If we're localizing a tied hash element, this new sv
658 * won't actually be stored in the hash - so it won't get
659 * reaped when the localize ends. Ensure it gets reaped by
660 * mortifying it instead. DAPM */
daeb922a 661 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 662 sv_2mortal(sv);
4e4c362e
GS
663}
664
2053acbf
NC
665SV*
666Perl_save_svref(pTHX_ SV **sptr)
667{
668 dVAR;
7918f24d
NC
669
670 PERL_ARGS_ASSERT_SAVE_SVREF;
671
2053acbf 672 SvGETMAGIC(*sptr);
e22024d3 673 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 674 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
675}
676
455ece5e 677I32
864dbfa3 678Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 679{
97aff369 680 dVAR;
35a4481c 681 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 682 - (char*)PL_savestack);
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;
79072805
LW
701 register SV *sv;
702 register SV *value;
703 register GV *gv;
704 register AV *av;
705 register HV *hv;
20454177 706 void* ptr;
f4dd75d9 707 register char* str;
161b7d16 708 I32 i;
302c0c93
NC
709 /* Localise the effects of the TAINT_NOT inside the loop. */
710 const bool was = PL_tainted;
79072805
LW
711
712 if (base < -1)
cea2e8a9 713 Perl_croak(aTHX_ "panic: corrupt saved stack index");
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 }
8aacddc1
NIS
789 break;
790 case SAVEt_HV: /* hash reference */
85fbaab2 791 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 792 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 793 SvREFCNT_dec(GvHV(gv));
8aacddc1 794 GvHV(gv) = hv;
fb73857a 795 if (SvMAGICAL(hv)) {
3280af22 796 PL_localizing = 2;
ad64d0ec 797 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 798 PL_localizing = 0;
fb73857a 799 }
8aacddc1 800 break;
994d373a
NC
801 case SAVEt_INT_SMALL:
802 ptr = SSPOPPTR;
803 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
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 */
10507e11 847 ptr = SSPOPPTR;
159b6efe 848 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 849 gp_free(gv);
c43ae56f 850 GvGP_set(gv, (GP*)ptr);
dd69841b 851 /* putting a method back into circulation ("local")*/
00169e2c 852 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvENAME_get(hv))
dd69841b 853 mro_method_changed_in(hv);
4633a7c4 854 SvREFCNT_dec(gv);
8aacddc1 855 break;
8990e307
LW
856 case SAVEt_FREESV:
857 ptr = SSPOPPTR;
ad64d0ec 858 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 859 break;
3987a177
Z
860 case SAVEt_FREECOPHH:
861 ptr = SSPOPPTR;
862 cophh_free((COPHH *)ptr);
863 break;
26d9b02f
JH
864 case SAVEt_MORTALIZESV:
865 ptr = SSPOPPTR;
ad64d0ec 866 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 867 break;
8990e307
LW
868 case SAVEt_FREEOP:
869 ptr = SSPOPPTR;
f3548bdc 870 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
871 op_free((OP*)ptr);
872 break;
873 case SAVEt_FREEPV:
874 ptr = SSPOPPTR;
1df70142 875 Safefree(ptr);
8990e307
LW
876 break;
877 case SAVEt_CLEARSV:
cdcdfc56 878 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 879 sv = *(SV**)ptr;
dd2155a4
DM
880
881 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
882 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
883 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
884 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
885 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
886 ));
887
bc44cdaf
GS
888 /* Can clear pad variable in place? */
889 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
890 /*
891 * if a my variable that was made readonly is going out of
892 * scope, we want to remove the readonlyness so that it can
893 * go out of scope quietly
8aacddc1 894 */
a26e96df 895 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
896 SvREADONLY_off(sv);
897
6fc92669 898 if (SvTHINKFIRST(sv))
840a7b70 899 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
900 if (SvMAGICAL(sv))
901 mg_free(sv);
8990e307
LW
902
903 switch (SvTYPE(sv)) {
904 case SVt_NULL:
905 break;
906 case SVt_PVAV:
502c6561 907 av_clear(MUTABLE_AV(sv));
8990e307
LW
908 break;
909 case SVt_PVHV:
85fbaab2 910 hv_clear(MUTABLE_HV(sv));
8990e307
LW
911 break;
912 case SVt_PVCV:
cea2e8a9 913 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 914 default:
0c34ef67 915 SvOK_off(sv);
8990e307
LW
916 break;
917 }
d9d18af6 918 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
919 }
920 else { /* Someone has a claim on this, so abandon it. */
35a4481c 921 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 922 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
923 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
924 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 925 default: *(SV**)ptr = newSV(0); break;
8990e307 926 }
53868620 927 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
928 /* preserve pad nature, but also mark as not live
929 * for any closure capturing */
2740392c 930 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
931 }
932 break;
933 case SAVEt_DELETE:
934 ptr = SSPOPPTR;
85fbaab2 935 hv = MUTABLE_HV(ptr);
35d4f826 936 i = SSPOPINT;
8990e307 937 ptr = SSPOPPTR;
35d4f826 938 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 939 SvREFCNT_dec(hv);
8aacddc1 940 Safefree(ptr);
8990e307 941 break;
c68ec7a9
VP
942 case SAVEt_ADELETE:
943 ptr = SSPOPPTR;
944 av = MUTABLE_AV(ptr);
945 i = SSPOPINT;
946 (void)av_delete(av, i, G_DISCARD);
947 SvREFCNT_dec(av);
948 break;
146174a9
CB
949 case SAVEt_DESTRUCTOR_X:
950 ptr = SSPOPPTR;
acfe0abc 951 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
952 break;
953 case SAVEt_REGCONTEXT:
e0fa7e2b 954 /* regexp must have croaked */
455ece5e 955 case SAVEt_ALLOC:
1be36ce0 956 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 957 break;
55497cff 958 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 959 i = SSPOPINT;
3280af22 960 PL_stack_sp = PL_stack_base + i;
55497cff 961 break;
ea8d6ae1
DB
962 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
963 i = SSPOPINT;
964 cxstack[i].blk_oldsp = SSPOPINT;
965 break;
161b7d16 966 case SAVEt_AELEM: /* array element */
ad64d0ec 967 value = MUTABLE_SV(SSPOPPTR);
161b7d16 968 i = SSPOPINT;
502c6561 969 av = MUTABLE_AV(SSPOPPTR);
658aef79 970 ptr = av_fetch(av,i,1);
5dd42e15
DM
971 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
972 SvREFCNT_dec(value);
4e4c362e
GS
973 if (ptr) {
974 sv = *(SV**)ptr;
3280af22 975 if (sv && sv != &PL_sv_undef) {
ad64d0ec 976 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 977 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
978 goto restore_sv;
979 }
980 }
981 SvREFCNT_dec(av);
982 SvREFCNT_dec(value);
983 break;
161b7d16 984 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
985 value = MUTABLE_SV(SSPOPPTR);
986 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 987 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 988 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 989 SvREFCNT_dec(sv);
4e4c362e 990 if (ptr) {
35a4481c 991 const SV * const oval = HeVAL((HE*)ptr);
3280af22 992 if (oval && oval != &PL_sv_undef) {
4e4c362e 993 ptr = &HeVAL((HE*)ptr);
ad64d0ec 994 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 995 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 996 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
997 goto restore_sv;
998 }
999 }
1000 SvREFCNT_dec(hv);
4e4c362e
GS
1001 SvREFCNT_dec(value);
1002 break;
462e5cf6 1003 case SAVEt_OP:
533c011a 1004 PL_op = (OP*)SSPOPPTR;
462e5cf6 1005 break;
25eaa213 1006 case SAVEt_HINTS:
045ac317 1007 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 1008 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
1009 GvHV(PL_hintgv) = NULL;
1010 }
20439bc7
Z
1011 cophh_free(CopHINTHASH_get(&PL_compiling));
1012 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1013 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1014 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1015 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1016 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1017 assert(GvHV(PL_hintgv));
1018 } else if (!GvHV(PL_hintgv)) {
1019 /* Need to add a new one manually, else gv_fetchpv() can
1020 add one in this code:
1021
1022 if (SvTYPE(gv) == SVt_PVGV) {
1023 if (add) {
1024 GvMULTI_on(gv);
1025 gv_init_sv(gv, sv_type);
1026 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1027 require_errno(gv);
1028 }
1029 return gv;
1030 }
1031
1032 and it won't have the magic set. */
1033
1034 HV *const hv = newHV();
1035 hv_magic(hv, NULL, PERL_MAGIC_hints);
1036 GvHV(PL_hintgv) = hv;
dfa41748 1037 }
5b9c0671 1038 assert(GvHV(PL_hintgv));
b3ac6de7 1039 break;
cb50131a 1040 case SAVEt_COMPPAD:
f3548bdc 1041 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1042 if (PL_comppad)
cb50131a
CB
1043 PL_curpad = AvARRAY(PL_comppad);
1044 else
4608196e 1045 PL_curpad = NULL;
cb50131a 1046 break;
09edbca0 1047 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1048 {
35a4481c 1049 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1050 SV **svp;
c3564e5c 1051 ptr = SSPOPPTR;
09edbca0
NC
1052 assert (ptr);
1053 svp = AvARRAY((PAD*)ptr) + off;
1054 /* This mortalizing used to be done by POPLOOP() via itersave.
1055 But as we have all the information here, we can do it here,
1056 save even having to have itersave in the struct. */
1057 sv_2mortal(*svp);
ad64d0ec 1058 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1059 }
1060 break;
8b7059b1
DM
1061 case SAVEt_SAVESWITCHSTACK:
1062 {
1063 dSP;
502c6561
NC
1064 AV *const t = MUTABLE_AV(SSPOPPTR);
1065 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1066 SWITCHSTACK(t,f);
1067 PL_curstackinfo->si_stack = f;
1068 }
1069 break;
14f338dc
DM
1070 case SAVEt_SET_SVFLAGS:
1071 {
35a4481c
AL
1072 const U32 val = (U32)SSPOPINT;
1073 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1074 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1075 SvFLAGS(sv) &= ~mask;
1076 SvFLAGS(sv) |= val;
1077 }
1078 break;
95e06916
NC
1079
1080 /* This would be a mathom, but Perl_save_svref() calls a static
1081 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1082 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1083 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1084 ptr = SSPOPPTR;
1085 av = NULL; /* what to refcnt_dec */
1086 goto restore_sv;
95e06916
NC
1087
1088 /* These are only saved in mathoms.c */
1089 case SAVEt_NSTAB:
159b6efe 1090 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1091 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1092 break;
2053acbf
NC
1093 case SAVEt_LONG: /* long reference */
1094 ptr = SSPOPPTR;
1095 *(long*)ptr = (long)SSPOPLONG;
1096 break;
95e06916
NC
1097 case SAVEt_IV: /* IV reference */
1098 ptr = SSPOPPTR;
1099 *(IV*)ptr = (IV)SSPOPIV;
1100 break;
1101
2053acbf
NC
1102 case SAVEt_I16: /* I16 reference */
1103 ptr = SSPOPPTR;
c9441fce 1104 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1105 break;
1106 case SAVEt_I8: /* I8 reference */
1107 ptr = SSPOPPTR;
6c61c2d4 1108 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1109 break;
2053acbf
NC
1110 case SAVEt_DESTRUCTOR:
1111 ptr = SSPOPPTR;
1112 (*SSPOPDPTR)(ptr);
1113 break;
fc15ae8f
NC
1114 case SAVEt_COP_ARYBASE:
1115 ptr = SSPOPPTR;
1116 i = SSPOPINT;
1117 CopARYBASE_set((COP *)ptr, i);
1118 break;
68da3b2f
NC
1119 case SAVEt_COMPILE_WARNINGS:
1120 ptr = SSPOPPTR;
72dc9ed5 1121
68da3b2f
NC
1122 if (!specialWARN(PL_compiling.cop_warnings))
1123 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1124
10edeb5d 1125 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1126 break;
1ade1aa1
NC
1127 case SAVEt_RE_STATE:
1128 {
1129 const struct re_save_state *const state
1130 = (struct re_save_state *)
1131 (PL_savestack + PL_savestack_ix
1132 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1133 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1134
1ade1aa1
NC
1135 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1136 Safefree(PL_reg_start_tmp);
1ade1aa1 1137 }
1ade1aa1
NC
1138 if (PL_reg_poscache != state->re_state_reg_poscache) {
1139 Safefree(PL_reg_poscache);
1ade1aa1 1140 }
46ab3289 1141 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1142 }
1143 break;
7c197c94
DM
1144 case SAVEt_PARSER:
1145 ptr = SSPOPPTR;
1146 parser_free((yy_parser *) ptr);
1147 break;
79072805 1148 default:
cea2e8a9 1149 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1150 }
1151 }
302c0c93
NC
1152
1153 PL_tainted = was;
f410a211
NC
1154
1155 PERL_ASYNC_CHECK();
79072805 1156}
8990e307 1157
8990e307 1158void
864dbfa3 1159Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1160{
97aff369 1161 dVAR;
7918f24d
NC
1162
1163 PERL_ARGS_ASSERT_CX_DUMP;
1164
35ff7856 1165#ifdef DEBUGGING
22c35a8c 1166 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1167 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1168 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1169 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1170 PTR2UV(cx->blk_oldcop));
760ac839
LW
1171 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1172 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1173 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1174 PTR2UV(cx->blk_oldpm));
760ac839 1175 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1176 }
6b35e009 1177 switch (CxTYPE(cx)) {
8990e307
LW
1178 case CXt_NULL:
1179 case CXt_BLOCK:
1180 break;
146174a9 1181 case CXt_FORMAT:
f9c764c5
NC
1182 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1183 PTR2UV(cx->blk_format.cv));
1184 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1185 PTR2UV(cx->blk_format.gv));
1186 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1187 PTR2UV(cx->blk_format.dfoutgv));
1188 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1189 (int)CxHASARGS(cx));
f9c764c5
NC
1190 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1191 PTR2UV(cx->blk_format.retop));
146174a9 1192 break;
8990e307 1193 case CXt_SUB:
146174a9
CB
1194 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1195 PTR2UV(cx->blk_sub.cv));
760ac839 1196 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1197 (long)cx->blk_sub.olddepth);
760ac839 1198 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1199 (int)CxHASARGS(cx));
1200 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1201 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1202 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1203 break;
1204 case CXt_EVAL:
760ac839 1205 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1206 (long)CxOLD_IN_EVAL(cx));
760ac839 1207 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1208 PL_op_name[CxOLD_OP_TYPE(cx)],
1209 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1210 if (cx->blk_eval.old_namesv)
1211 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1212 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1213 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1214 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1215 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1216 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1217 break;
1218
c6fdafd0 1219 case CXt_LOOP_LAZYIV:
d01136d6 1220 case CXt_LOOP_LAZYSV:
3b719c58
NC
1221 case CXt_LOOP_FOR:
1222 case CXt_LOOP_PLAIN:
0cbdab38 1223 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1224 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1225 (long)cx->blk_loop.resetsp);
022eaa24
NC
1226 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1227 PTR2UV(cx->blk_loop.my_op));
d01136d6 1228 /* XXX: not accurate for LAZYSV/IV */
146174a9 1229 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1230 PTR2UV(cx->blk_loop.state_u.ary.ary));
1231 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1232 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1233 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1234 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1235 break;
1236
1237 case CXt_SUBST:
760ac839 1238 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1239 (long)cx->sb_iters);
760ac839 1240 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1241 (long)cx->sb_maxiters);
35ef4773
GS
1242 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1243 (long)cx->sb_rflags);
760ac839 1244 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1245 (long)CxONCE(cx));
760ac839 1246 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1247 cx->sb_orig);
146174a9
CB
1248 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1249 PTR2UV(cx->sb_dstr));
1250 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1251 PTR2UV(cx->sb_targ));
1252 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1253 PTR2UV(cx->sb_s));
1254 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1255 PTR2UV(cx->sb_m));
1256 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1257 PTR2UV(cx->sb_strend));
1258 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1259 PTR2UV(cx->sb_rxres));
8990e307
LW
1260 break;
1261 }
65e66c80 1262#else
96a5add6 1263 PERL_UNUSED_CONTEXT;
65e66c80 1264 PERL_UNUSED_ARG(cx);
17c3b450 1265#endif /* DEBUGGING */
35ff7856 1266}
241d1a3b
NC
1267
1268/*
1269 * Local variables:
1270 * c-indentation-style: bsd
1271 * c-basic-offset: 4
1272 * indent-tabs-mode: t
1273 * End:
1274 *
37442d52
RGS
1275 * ex: set ts=8 sts=4 sw=4 noet:
1276 */