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[perl5.git] / scope.c
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a0d0e21e 1/* scope.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * For the fashion of Minas Tirith was such that it was built on seven
13 * levels...
14 *
15 * [p.751 of _The Lord of the Rings_, V/i: "Minas Tirith"]
79072805
LW
16 */
17
ddfa107c 18/* This file contains functions to manipulate several of Perl's stacks;
166f8a29
DM
19 * in particular it contains code to push various types of things onto
20 * the savestack, then to pop them off and perform the correct restorative
21 * action for each one. This corresponds to the cleanup Perl does at
22 * each scope exit.
23 */
24
79072805 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_SCOPE_C
79072805
LW
27#include "perl.h"
28
a0d0e21e 29SV**
864dbfa3 30Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
a0d0e21e 31{
97aff369 32 dVAR;
7918f24d
NC
33
34 PERL_ARGS_ASSERT_STACK_GROW;
35
3280af22 36 PL_stack_sp = sp;
2ce36478 37#ifndef STRESS_REALLOC
3280af22 38 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
2ce36478 39#else
6b88bc9c 40 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
2ce36478 41#endif
3280af22 42 return PL_stack_sp;
a0d0e21e
LW
43}
44
2ce36478
SM
45#ifndef STRESS_REALLOC
46#define GROW(old) ((old) * 3 / 2)
47#else
48#define GROW(old) ((old) + 1)
49#endif
50
e336de0d 51PERL_SI *
864dbfa3 52Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
e336de0d 53{
97aff369 54 dVAR;
e336de0d 55 PERL_SI *si;
a02a5408 56 Newx(si, 1, PERL_SI);
e336de0d
GS
57 si->si_stack = newAV();
58 AvREAL_off(si->si_stack);
59 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
3280af22 60 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
e336de0d
GS
61 AvFILLp(si->si_stack) = 0;
62 si->si_prev = 0;
63 si->si_next = 0;
64 si->si_cxmax = cxitems - 1;
65 si->si_cxix = -1;
e788e7d3 66 si->si_type = PERLSI_UNDEF;
a02a5408 67 Newx(si->si_cxstack, cxitems, PERL_CONTEXT);
9965345d
JH
68 /* Without any kind of initialising PUSHSUBST()
69 * in pp_subst() will read uninitialised heap. */
7e337ee0 70 PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT);
e336de0d
GS
71 return si;
72}
73
79072805 74I32
864dbfa3 75Perl_cxinc(pTHX)
79072805 76{
97aff369 77 dVAR;
a3b680e6 78 const IV old_max = cxstack_max;
2ce36478 79 cxstack_max = GROW(cxstack_max);
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
VP
189 if (!(flags & SAVEf_KEEPOLDELEM))
190 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
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
b9e00b79
LRG
282 SSCHECK(4);
283 SSPUSHINT(SvFAKE(gv));
284 SSPUSHPTR(GvGP(gv));
285 SSPUSHPTR(SvREFCNT_inc(gv));
86e10ae1 286 SSPUSHUV(SAVEt_GP);
b9e00b79
LRG
287
288 /* Don't let the localized GV coerce into non-glob, otherwise we would
289 * not be able to restore GP upon leave from context if that happened */
290 SvFAKE_off(gv);
79072805 291
5f05dabc 292 if (empty) {
12816592 293 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 294
fae75791 295 if (GvCVu(gv))
e1a479c5 296 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
297 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
298 gp->gp_io = newIO();
299 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
300 }
72651472
NC
301#ifdef PERL_DONT_CREATE_GVSV
302 if (gv == PL_errgv) {
303 /* We could scatter this logic everywhere by changing the
304 definition of ERRSV from GvSV() to GvSVn(), but it seems more
305 efficient to do this check once here. */
306 gp->gp_sv = newSV(0);
307 }
308#endif
12816592 309 GvGP(gv) = gp;
5f05dabc
PP
310 }
311 else {
44a8e56a 312 gp_ref(GvGP(gv));
5f05dabc
PP
313 GvINTRO_on(gv);
314 }
79072805 315}
79072805 316
79072805 317AV *
864dbfa3 318Perl_save_ary(pTHX_ GV *gv)
79072805 319{
97aff369 320 dVAR;
901017d6 321 AV * const oav = GvAVn(gv);
67a38de0 322 AV *av;
fb73857a 323
7918f24d
NC
324 PERL_ARGS_ASSERT_SAVE_ARY;
325
67a38de0
NIS
326 if (!AvREAL(oav) && AvREIFY(oav))
327 av_reify(oav);
e22024d3 328 save_pushptrptr(gv, oav, SAVEt_AV);
79072805 329
4608196e 330 GvAV(gv) = NULL;
fb73857a 331 av = GvAVn(gv);
0cbee0a4 332 if (SvMAGIC(oav))
9711599e 333 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 334 return av;
79072805
LW
335}
336
337HV *
864dbfa3 338Perl_save_hash(pTHX_ GV *gv)
79072805 339{
97aff369 340 dVAR;
fb73857a
PP
341 HV *ohv, *hv;
342
7918f24d
NC
343 PERL_ARGS_ASSERT_SAVE_HASH;
344
e22024d3 345 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
79072805 346
4608196e 347 GvHV(gv) = NULL;
fb73857a 348 hv = GvHVn(gv);
0cbee0a4 349 if (SvMAGIC(ohv))
9711599e 350 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 351 return hv;
79072805
LW
352}
353
354void
864dbfa3 355Perl_save_item(pTHX_ register SV *item)
79072805 356{
97aff369 357 dVAR;
901017d6 358 register SV * const sv = newSVsv(item);
79072805 359
7918f24d
NC
360 PERL_ARGS_ASSERT_SAVE_ITEM;
361
e22024d3
NC
362 save_pushptrptr(item, /* remember the pointer */
363 sv, /* remember the value */
364 SAVEt_ITEM);
79072805
LW
365}
366
367void
1409bc06 368Perl_save_bool(pTHX_ bool *boolp)
79072805 369{
97aff369 370 dVAR;
7918f24d 371
1409bc06 372 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 373
65504245 374 SSCHECK(2);
1409bc06 375 SSPUSHPTR(boolp);
65504245 376 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
377}
378
7623d426
NC
379void
380Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
381{
382 dVAR;
383 SSCHECK(3);
384 SSPUSHINT(i);
385 SSPUSHPTR(ptr);
c6bf6a65 386 SSPUSHUV(type);
79072805
LW
387}
388
389void
1409bc06 390Perl_save_int(pTHX_ int *intp)
9febdf04 391{
97aff369 392 dVAR;
994d373a 393 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 394
1409bc06 395 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 396
994d373a
NC
397 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
398 SSCHECK(2);
399 SSPUSHPTR(intp);
400 SSPUSHUV(SAVEt_INT_SMALL | shifted);
401 } else
402 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
403}
404
405void
58188858
RGS
406Perl_save_I8(pTHX_ I8 *bytep)
407{
408 dVAR;
7918f24d
NC
409
410 PERL_ARGS_ASSERT_SAVE_I8;
411
6c61c2d4
NC
412 SSCHECK(2);
413 SSPUSHPTR(bytep);
414 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
415}
416
417void
87a84751
JH
418Perl_save_I16(pTHX_ I16 *intp)
419{
420 dVAR;
7918f24d
NC
421
422 PERL_ARGS_ASSERT_SAVE_I16;
423
c9441fce
NC
424 SSCHECK(2);
425 SSPUSHPTR(intp);
426 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
427}
428
429void
864dbfa3 430Perl_save_I32(pTHX_ I32 *intp)
79072805 431{
97aff369 432 dVAR;
89abef21 433 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
434
435 PERL_ARGS_ASSERT_SAVE_I32;
436
89abef21
NC
437 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
438 SSCHECK(2);
439 SSPUSHPTR(intp);
440 SSPUSHUV(SAVEt_I32_SMALL | shifted);
441 } else
442 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
443}
444
85e6fe83
LW
445/* Cannot use save_sptr() to store a char* since the SV** cast will
446 * force word-alignment and we'll miss the pointer.
447 */
448void
864dbfa3 449Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 450{
97aff369 451 dVAR;
7918f24d
NC
452
453 PERL_ARGS_ASSERT_SAVE_PPTR;
454
e22024d3 455 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
456}
457
79072805 458void
146174a9
CB
459Perl_save_vptr(pTHX_ void *ptr)
460{
97aff369 461 dVAR;
7918f24d
NC
462
463 PERL_ARGS_ASSERT_SAVE_VPTR;
464
e22024d3 465 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
466}
467
468void
864dbfa3 469Perl_save_sptr(pTHX_ SV **sptr)
79072805 470{
97aff369 471 dVAR;
7918f24d
NC
472
473 PERL_ARGS_ASSERT_SAVE_SPTR;
474
e22024d3 475 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
476}
477
c3564e5c 478void
09edbca0 479Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 480{
97aff369 481 dVAR;
c3564e5c 482 SSCHECK(4);
f3548bdc 483 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 484 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 485 SSPUSHPTR(PL_comppad);
c3564e5c 486 SSPUSHLONG((long)off);
c6bf6a65 487 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
488}
489
79072805 490void
864dbfa3 491Perl_save_hptr(pTHX_ HV **hptr)
79072805 492{
97aff369 493 dVAR;
7918f24d
NC
494
495 PERL_ARGS_ASSERT_SAVE_HPTR;
496
e22024d3 497 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
498}
499
500void
864dbfa3 501Perl_save_aptr(pTHX_ AV **aptr)
79072805 502{
97aff369 503 dVAR;
7918f24d
NC
504
505 PERL_ARGS_ASSERT_SAVE_APTR;
506
e22024d3 507 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
508}
509
510void
2fd8beea 511Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 512{
97aff369 513 dVAR;
8990e307 514 SSCHECK(2);
2fd8beea 515 SSPUSHPTR(ptr);
c6bf6a65 516 SSPUSHUV(type);
8990e307
LW
517}
518
519void
864dbfa3 520Perl_save_clearsv(pTHX_ SV **svp)
8990e307 521{
97aff369 522 dVAR;
cdcdfc56
NC
523 const UV offset = svp - PL_curpad;
524 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
525
526 PERL_ARGS_ASSERT_SAVE_CLEARSV;
527
f3548bdc 528 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
529 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
530 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
531 offset, svp, PL_curpad);
532
533 SSCHECK(1);
534 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 535 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
536}
537
538void
864dbfa3 539Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 540{
97aff369 541 dVAR;
7918f24d
NC
542
543 PERL_ARGS_ASSERT_SAVE_DELETE;
544
85a721ca 545 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
546}
547
548void
af097752
VP
549Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
550{
551 STRLEN len;
552 I32 klen;
553 const char *key;
554
555 PERL_ARGS_ASSERT_SAVE_HDELETE;
556
557 key = SvPV_const(keysv, len);
558 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
559 SvREFCNT_inc_simple_void_NN(hv);
560 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
561}
562
563void
c68ec7a9
VP
564Perl_save_adelete(pTHX_ AV *av, I32 key)
565{
566 dVAR;
567
568 PERL_ARGS_ASSERT_SAVE_ADELETE;
569
570 SvREFCNT_inc_void(av);
571 save_pushi32ptr(key, av, SAVEt_ADELETE);
572}
573
574void
12ab1f58
JH
575Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
576{
577 dVAR;
7918f24d
NC
578
579 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
580
12ab1f58
JH
581 SSCHECK(3);
582 SSPUSHDPTR(f);
583 SSPUSHPTR(p);
c6bf6a65 584 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
585}
586
587void
146174a9
CB
588Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
589{
97aff369 590 dVAR;
146174a9
CB
591 SSCHECK(3);
592 SSPUSHDXPTR(f);
593 SSPUSHPTR(p);
c6bf6a65 594 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
595}
596
597void
da8315f8
NC
598Perl_save_hints(pTHX)
599{
600 dVAR;
20439bc7 601 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 602 if (PL_hints & HINT_LOCALIZE_HH) {
20439bc7 603 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints, save_cophh, SAVEt_HINTS);
defdfed5 604 GvHV(PL_hintgv) = hv_copy_hints_hv(GvHV(PL_hintgv));
be84297e 605 } else {
20439bc7 606 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 607 }
be84297e
NC
608}
609
610static void
611S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
612 const int type)
613{
614 SSCHECK(4);
615 SSPUSHPTR(ptr1);
616 SSPUSHINT(i);
617 SSPUSHPTR(ptr2);
c6bf6a65 618 SSPUSHUV(type);
da8315f8
NC
619}
620
621void
91d1c79f 622Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 623{
97aff369 624 dVAR;
bfc4de9f 625 SV *sv;
7918f24d 626
91d1c79f 627 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 628
0cbee0a4 629 SvGETMAGIC(*sptr);
be84297e
NC
630 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
631 SAVEt_AELEM);
5dd42e15
DM
632 /* if it gets reified later, the restore will have the wrong refcnt */
633 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 634 SvREFCNT_inc_void(*sptr);
91d1c79f 635 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
636 if (flags & SAVEf_KEEPOLDELEM)
637 return;
bfc4de9f
DM
638 sv = *sptr;
639 /* If we're localizing a tied array element, this new sv
640 * won't actually be stored in the array - so it won't get
641 * reaped when the localize ends. Ensure it gets reaped by
642 * mortifying it instead. DAPM */
daeb922a 643 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 644 sv_2mortal(sv);
4e4c362e
GS
645}
646
647void
af7df257 648Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 649{
97aff369 650 dVAR;
bfc4de9f 651 SV *sv;
7918f24d 652
af7df257 653 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 654
0cbee0a4 655 SvGETMAGIC(*sptr);
4e4c362e 656 SSCHECK(4);
b37c2d43 657 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 658 SSPUSHPTR(newSVsv(key));
4e4c362e 659 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 660 SSPUSHUV(SAVEt_HELEM);
af7df257 661 save_scalar_at(sptr, flags);
75d34a09
VP
662 if (flags & SAVEf_KEEPOLDELEM)
663 return;
bfc4de9f
DM
664 sv = *sptr;
665 /* If we're localizing a tied hash element, this new sv
666 * won't actually be stored in the hash - so it won't get
667 * reaped when the localize ends. Ensure it gets reaped by
668 * mortifying it instead. DAPM */
daeb922a 669 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 670 sv_2mortal(sv);
4e4c362e
GS
671}
672
2053acbf
NC
673SV*
674Perl_save_svref(pTHX_ SV **sptr)
675{
676 dVAR;
7918f24d
NC
677
678 PERL_ARGS_ASSERT_SAVE_SVREF;
679
2053acbf 680 SvGETMAGIC(*sptr);
e22024d3 681 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 682 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
683}
684
455ece5e 685I32
864dbfa3 686Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 687{
97aff369 688 dVAR;
35a4481c 689 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 690 - (char*)PL_savestack);
1be36ce0
NC
691 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
692 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 693
1be36ce0
NC
694 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
695 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
696 elems, size, pad);
697
698 SSGROW(elems + 1);
455ece5e
AD
699
700 PL_savestack_ix += elems;
1be36ce0 701 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
702 return start;
703}
704
462e5cf6 705void
864dbfa3 706Perl_leave_scope(pTHX_ I32 base)
79072805 707{
97aff369 708 dVAR;
79072805
LW
709 register SV *sv;
710 register SV *value;
711 register GV *gv;
712 register AV *av;
713 register HV *hv;
20454177 714 void* ptr;
f4dd75d9 715 register char* str;
161b7d16 716 I32 i;
302c0c93
NC
717 /* Localise the effects of the TAINT_NOT inside the loop. */
718 const bool was = PL_tainted;
79072805
LW
719
720 if (base < -1)
cea2e8a9 721 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
722 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
723 (long)PL_savestack_ix, (long)base));
3280af22 724 while (PL_savestack_ix > base) {
c6bf6a65
NC
725 UV uv = SSPOPUV;
726 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
727 TAINT_NOT;
728
c6bf6a65 729 switch (type) {
79072805 730 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
731 value = MUTABLE_SV(SSPOPPTR);
732 sv = MUTABLE_SV(SSPOPPTR);
79072805 733 sv_replace(sv,value);
3280af22 734 PL_localizing = 2;
79072805 735 SvSETMAGIC(sv);
3280af22 736 PL_localizing = 0;
79072805 737 break;
8aacddc1 738 case SAVEt_SV: /* scalar reference */
ad64d0ec 739 value = MUTABLE_SV(SSPOPPTR);
159b6efe 740 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 741 ptr = &GvSV(gv);
502c6561 742 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
743 restore_sv:
744 sv = *(SV**)ptr;
2053acbf
NC
745 *(SV**)ptr = value;
746 SvREFCNT_dec(sv);
747 PL_localizing = 2;
748 SvSETMAGIC(value);
749 PL_localizing = 0;
750 SvREFCNT_dec(value);
751 if (av) /* actually an av, hv or gv */
752 SvREFCNT_dec(av);
753 break;
8aacddc1 754 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 755 ptr = SSPOPPTR;
b03d03b0 756 str = (char*)SSPOPPTR;
f4dd75d9
GS
757 if (*(char**)ptr != str) {
758 Safefree(*(char**)ptr);
759 *(char**)ptr = str;
760 }
761 break;
05ec9bb3
NIS
762 case SAVEt_SHARED_PVREF: /* shared pv */
763 str = (char*)SSPOPPTR;
764 ptr = SSPOPPTR;
765 if (*(char**)ptr != str) {
5e54c26f 766#ifdef NETWARE
9ecbcc42 767 PerlMem_free(*(char**)ptr);
5e54c26f 768#else
05ec9bb3 769 PerlMemShared_free(*(char**)ptr);
5e54c26f 770#endif
05ec9bb3
NIS
771 *(char**)ptr = str;
772 }
773 break;
f83b46a0
DM
774 case SAVEt_GVSV: /* scalar slot in GV */
775 value = MUTABLE_SV(SSPOPPTR);
776 gv = MUTABLE_GV(SSPOPPTR);
777 ptr = &GvSV(gv);
778 goto restore_svp;
8aacddc1 779 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 780 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 781 ptr = SSPOPPTR;
f83b46a0 782 restore_svp:
f4dd75d9
GS
783 sv = *(SV**)ptr;
784 *(SV**)ptr = value;
785 SvREFCNT_dec(sv);
b9d12d37
GS
786 SvREFCNT_dec(value);
787 break;
8aacddc1 788 case SAVEt_AV: /* array reference */
502c6561 789 av = MUTABLE_AV(SSPOPPTR);
159b6efe 790 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 791 SvREFCNT_dec(GvAV(gv));
8aacddc1 792 GvAV(gv) = av;
fb73857a 793 if (SvMAGICAL(av)) {
3280af22 794 PL_localizing = 2;
ad64d0ec 795 SvSETMAGIC(MUTABLE_SV(av));
3280af22 796 PL_localizing = 0;
fb73857a 797 }
8aacddc1
NIS
798 break;
799 case SAVEt_HV: /* hash reference */
85fbaab2 800 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 801 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 802 SvREFCNT_dec(GvHV(gv));
8aacddc1 803 GvHV(gv) = hv;
fb73857a 804 if (SvMAGICAL(hv)) {
3280af22 805 PL_localizing = 2;
ad64d0ec 806 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 807 PL_localizing = 0;
fb73857a 808 }
8aacddc1 809 break;
994d373a
NC
810 case SAVEt_INT_SMALL:
811 ptr = SSPOPPTR;
812 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
813 break;
79072805
LW
814 case SAVEt_INT: /* int reference */
815 ptr = SSPOPPTR;
816 *(int*)ptr = (int)SSPOPINT;
817 break;
9febdf04
RH
818 case SAVEt_BOOL: /* bool reference */
819 ptr = SSPOPPTR;
65504245 820 *(bool*)ptr = cBOOL(uv >> 8);
9febdf04 821 break;
89abef21
NC
822 case SAVEt_I32_SMALL:
823 ptr = SSPOPPTR;
824 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
825 break;
79072805
LW
826 case SAVEt_I32: /* I32 reference */
827 ptr = SSPOPPTR;
3235b7a3
NC
828#ifdef PERL_DEBUG_READONLY_OPS
829 {
830 const I32 val = SSPOPINT;
831 if (*(I32*)ptr != val)
832 *(I32*)ptr = val;
833 }
834#else
79072805 835 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 836#endif
79072805
LW
837 break;
838 case SAVEt_SPTR: /* SV* reference */
839 ptr = SSPOPPTR;
ad64d0ec 840 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 841 break;
146174a9 842 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
843 case SAVEt_PPTR: /* char* reference */
844 ptr = SSPOPPTR;
845 *(char**)ptr = (char*)SSPOPPTR;
846 break;
79072805
LW
847 case SAVEt_HPTR: /* HV* reference */
848 ptr = SSPOPPTR;
85fbaab2 849 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
850 break;
851 case SAVEt_APTR: /* AV* reference */
852 ptr = SSPOPPTR;
502c6561 853 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 854 break;
fb73857a 855 case SAVEt_GP: /* scalar reference */
159b6efe 856 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 857 gp_free(gv);
b9e00b79
LRG
858 GvGP(gv) = (GP*)SSPOPPTR;
859 if (SSPOPINT)
860 SvFAKE_on(gv);
dd69841b
BB
861 /* putting a method back into circulation ("local")*/
862 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
863 mro_method_changed_in(hv);
4633a7c4 864 SvREFCNT_dec(gv);
8aacddc1 865 break;
8990e307
LW
866 case SAVEt_FREESV:
867 ptr = SSPOPPTR;
ad64d0ec 868 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 869 break;
26d9b02f
JH
870 case SAVEt_MORTALIZESV:
871 ptr = SSPOPPTR;
ad64d0ec 872 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 873 break;
8990e307
LW
874 case SAVEt_FREEOP:
875 ptr = SSPOPPTR;
f3548bdc 876 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
877 op_free((OP*)ptr);
878 break;
879 case SAVEt_FREEPV:
880 ptr = SSPOPPTR;
1df70142 881 Safefree(ptr);
8990e307
LW
882 break;
883 case SAVEt_CLEARSV:
cdcdfc56 884 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 885 sv = *(SV**)ptr;
dd2155a4
DM
886
887 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
888 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
889 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
890 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
891 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
892 ));
893
bc44cdaf
GS
894 /* Can clear pad variable in place? */
895 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
896 /*
897 * if a my variable that was made readonly is going out of
898 * scope, we want to remove the readonlyness so that it can
899 * go out of scope quietly
8aacddc1 900 */
a26e96df 901 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
902 SvREADONLY_off(sv);
903
6fc92669 904 if (SvTHINKFIRST(sv))
840a7b70 905 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
906 if (SvMAGICAL(sv))
907 mg_free(sv);
8990e307
LW
908
909 switch (SvTYPE(sv)) {
910 case SVt_NULL:
911 break;
912 case SVt_PVAV:
502c6561 913 av_clear(MUTABLE_AV(sv));
8990e307
LW
914 break;
915 case SVt_PVHV:
85fbaab2 916 hv_clear(MUTABLE_HV(sv));
8990e307
LW
917 break;
918 case SVt_PVCV:
cea2e8a9 919 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 920 default:
0c34ef67 921 SvOK_off(sv);
8990e307
LW
922 break;
923 }
d9d18af6 924 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
925 }
926 else { /* Someone has a claim on this, so abandon it. */
35a4481c 927 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 928 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
929 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
930 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 931 default: *(SV**)ptr = newSV(0); break;
8990e307 932 }
53868620 933 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
934 /* preserve pad nature, but also mark as not live
935 * for any closure capturing */
2740392c 936 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
937 }
938 break;
939 case SAVEt_DELETE:
940 ptr = SSPOPPTR;
85fbaab2 941 hv = MUTABLE_HV(ptr);
35d4f826 942 i = SSPOPINT;
8990e307 943 ptr = SSPOPPTR;
35d4f826 944 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 945 SvREFCNT_dec(hv);
8aacddc1 946 Safefree(ptr);
8990e307 947 break;
c68ec7a9
VP
948 case SAVEt_ADELETE:
949 ptr = SSPOPPTR;
950 av = MUTABLE_AV(ptr);
951 i = SSPOPINT;
952 (void)av_delete(av, i, G_DISCARD);
953 SvREFCNT_dec(av);
954 break;
146174a9
CB
955 case SAVEt_DESTRUCTOR_X:
956 ptr = SSPOPPTR;
acfe0abc 957 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
958 break;
959 case SAVEt_REGCONTEXT:
e0fa7e2b 960 /* regexp must have croaked */
455ece5e 961 case SAVEt_ALLOC:
1be36ce0 962 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 963 break;
55497cff 964 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 965 i = SSPOPINT;
3280af22 966 PL_stack_sp = PL_stack_base + i;
55497cff 967 break;
ea8d6ae1
DB
968 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
969 i = SSPOPINT;
970 cxstack[i].blk_oldsp = SSPOPINT;
971 break;
161b7d16 972 case SAVEt_AELEM: /* array element */
ad64d0ec 973 value = MUTABLE_SV(SSPOPPTR);
161b7d16 974 i = SSPOPINT;
502c6561 975 av = MUTABLE_AV(SSPOPPTR);
658aef79 976 ptr = av_fetch(av,i,1);
5dd42e15
DM
977 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
978 SvREFCNT_dec(value);
4e4c362e
GS
979 if (ptr) {
980 sv = *(SV**)ptr;
3280af22 981 if (sv && sv != &PL_sv_undef) {
ad64d0ec 982 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 983 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
984 goto restore_sv;
985 }
986 }
987 SvREFCNT_dec(av);
988 SvREFCNT_dec(value);
989 break;
161b7d16 990 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
991 value = MUTABLE_SV(SSPOPPTR);
992 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 993 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 994 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 995 SvREFCNT_dec(sv);
4e4c362e 996 if (ptr) {
35a4481c 997 const SV * const oval = HeVAL((HE*)ptr);
3280af22 998 if (oval && oval != &PL_sv_undef) {
4e4c362e 999 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1000 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1001 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1002 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1003 goto restore_sv;
1004 }
1005 }
1006 SvREFCNT_dec(hv);
4e4c362e
GS
1007 SvREFCNT_dec(value);
1008 break;
462e5cf6 1009 case SAVEt_OP:
533c011a 1010 PL_op = (OP*)SSPOPPTR;
462e5cf6 1011 break;
25eaa213 1012 case SAVEt_HINTS:
045ac317 1013 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 1014 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
1015 GvHV(PL_hintgv) = NULL;
1016 }
20439bc7
Z
1017 cophh_free(CopHINTHASH_get(&PL_compiling));
1018 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1019 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1020 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1021 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1022 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1023 assert(GvHV(PL_hintgv));
1024 } else if (!GvHV(PL_hintgv)) {
1025 /* Need to add a new one manually, else gv_fetchpv() can
1026 add one in this code:
1027
1028 if (SvTYPE(gv) == SVt_PVGV) {
1029 if (add) {
1030 GvMULTI_on(gv);
1031 gv_init_sv(gv, sv_type);
1032 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1033 require_errno(gv);
1034 }
1035 return gv;
1036 }
1037
1038 and it won't have the magic set. */
1039
1040 HV *const hv = newHV();
1041 hv_magic(hv, NULL, PERL_MAGIC_hints);
1042 GvHV(PL_hintgv) = hv;
dfa41748 1043 }
5b9c0671 1044 assert(GvHV(PL_hintgv));
b3ac6de7 1045 break;
cb50131a 1046 case SAVEt_COMPPAD:
f3548bdc 1047 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1048 if (PL_comppad)
cb50131a
CB
1049 PL_curpad = AvARRAY(PL_comppad);
1050 else
4608196e 1051 PL_curpad = NULL;
cb50131a 1052 break;
09edbca0 1053 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1054 {
35a4481c 1055 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1056 SV **svp;
c3564e5c 1057 ptr = SSPOPPTR;
09edbca0
NC
1058 assert (ptr);
1059 svp = AvARRAY((PAD*)ptr) + off;
1060 /* This mortalizing used to be done by POPLOOP() via itersave.
1061 But as we have all the information here, we can do it here,
1062 save even having to have itersave in the struct. */
1063 sv_2mortal(*svp);
ad64d0ec 1064 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1065 }
1066 break;
8b7059b1
DM
1067 case SAVEt_SAVESWITCHSTACK:
1068 {
1069 dSP;
502c6561
NC
1070 AV *const t = MUTABLE_AV(SSPOPPTR);
1071 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1072 SWITCHSTACK(t,f);
1073 PL_curstackinfo->si_stack = f;
1074 }
1075 break;
14f338dc
DM
1076 case SAVEt_SET_SVFLAGS:
1077 {
35a4481c
AL
1078 const U32 val = (U32)SSPOPINT;
1079 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1080 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1081 SvFLAGS(sv) &= ~mask;
1082 SvFLAGS(sv) |= val;
1083 }
1084 break;
95e06916
NC
1085
1086 /* This would be a mathom, but Perl_save_svref() calls a static
1087 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1088 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1089 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1090 ptr = SSPOPPTR;
1091 av = NULL; /* what to refcnt_dec */
1092 goto restore_sv;
95e06916
NC
1093
1094 /* These are only saved in mathoms.c */
1095 case SAVEt_NSTAB:
159b6efe 1096 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1097 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1098 break;
2053acbf
NC
1099 case SAVEt_LONG: /* long reference */
1100 ptr = SSPOPPTR;
1101 *(long*)ptr = (long)SSPOPLONG;
1102 break;
95e06916
NC
1103 case SAVEt_IV: /* IV reference */
1104 ptr = SSPOPPTR;
1105 *(IV*)ptr = (IV)SSPOPIV;
1106 break;
1107
2053acbf
NC
1108 case SAVEt_I16: /* I16 reference */
1109 ptr = SSPOPPTR;
c9441fce 1110 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1111 break;
1112 case SAVEt_I8: /* I8 reference */
1113 ptr = SSPOPPTR;
6c61c2d4 1114 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1115 break;
2053acbf
NC
1116 case SAVEt_DESTRUCTOR:
1117 ptr = SSPOPPTR;
1118 (*SSPOPDPTR)(ptr);
1119 break;
fc15ae8f
NC
1120 case SAVEt_COP_ARYBASE:
1121 ptr = SSPOPPTR;
1122 i = SSPOPINT;
1123 CopARYBASE_set((COP *)ptr, i);
1124 break;
68da3b2f
NC
1125 case SAVEt_COMPILE_WARNINGS:
1126 ptr = SSPOPPTR;
72dc9ed5 1127
68da3b2f
NC
1128 if (!specialWARN(PL_compiling.cop_warnings))
1129 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1130
10edeb5d 1131 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1132 break;
1ade1aa1
NC
1133 case SAVEt_RE_STATE:
1134 {
1135 const struct re_save_state *const state
1136 = (struct re_save_state *)
1137 (PL_savestack + PL_savestack_ix
1138 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1139 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1140
1ade1aa1
NC
1141 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1142 Safefree(PL_reg_start_tmp);
1ade1aa1 1143 }
1ade1aa1
NC
1144 if (PL_reg_poscache != state->re_state_reg_poscache) {
1145 Safefree(PL_reg_poscache);
1ade1aa1 1146 }
46ab3289 1147 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1148 }
1149 break;
7c197c94
DM
1150 case SAVEt_PARSER:
1151 ptr = SSPOPPTR;
1152 parser_free((yy_parser *) ptr);
1153 break;
79072805 1154 default:
cea2e8a9 1155 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1156 }
1157 }
302c0c93
NC
1158
1159 PL_tainted = was;
f410a211
NC
1160
1161 PERL_ASYNC_CHECK();
79072805 1162}
8990e307 1163
8990e307 1164void
864dbfa3 1165Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1166{
97aff369 1167 dVAR;
7918f24d
NC
1168
1169 PERL_ARGS_ASSERT_CX_DUMP;
1170
35ff7856 1171#ifdef DEBUGGING
22c35a8c 1172 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1173 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1174 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1175 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1176 PTR2UV(cx->blk_oldcop));
760ac839
LW
1177 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1178 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1179 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1180 PTR2UV(cx->blk_oldpm));
760ac839 1181 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1182 }
6b35e009 1183 switch (CxTYPE(cx)) {
8990e307
LW
1184 case CXt_NULL:
1185 case CXt_BLOCK:
1186 break;
146174a9 1187 case CXt_FORMAT:
f9c764c5
NC
1188 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1189 PTR2UV(cx->blk_format.cv));
1190 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1191 PTR2UV(cx->blk_format.gv));
1192 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1193 PTR2UV(cx->blk_format.dfoutgv));
1194 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1195 (int)CxHASARGS(cx));
f9c764c5
NC
1196 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1197 PTR2UV(cx->blk_format.retop));
146174a9 1198 break;
8990e307 1199 case CXt_SUB:
146174a9
CB
1200 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1201 PTR2UV(cx->blk_sub.cv));
760ac839 1202 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1203 (long)cx->blk_sub.olddepth);
760ac839 1204 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1205 (int)CxHASARGS(cx));
1206 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1207 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1208 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1209 break;
1210 case CXt_EVAL:
760ac839 1211 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1212 (long)CxOLD_IN_EVAL(cx));
760ac839 1213 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1214 PL_op_name[CxOLD_OP_TYPE(cx)],
1215 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1216 if (cx->blk_eval.old_namesv)
1217 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1218 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1219 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1220 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1221 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1222 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1223 break;
1224
c6fdafd0 1225 case CXt_LOOP_LAZYIV:
d01136d6 1226 case CXt_LOOP_LAZYSV:
3b719c58
NC
1227 case CXt_LOOP_FOR:
1228 case CXt_LOOP_PLAIN:
0cbdab38 1229 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1230 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1231 (long)cx->blk_loop.resetsp);
022eaa24
NC
1232 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1233 PTR2UV(cx->blk_loop.my_op));
d01136d6 1234 /* XXX: not accurate for LAZYSV/IV */
146174a9 1235 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1236 PTR2UV(cx->blk_loop.state_u.ary.ary));
1237 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1238 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1239 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1240 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1241 break;
1242
1243 case CXt_SUBST:
760ac839 1244 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1245 (long)cx->sb_iters);
760ac839 1246 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1247 (long)cx->sb_maxiters);
35ef4773
GS
1248 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1249 (long)cx->sb_rflags);
760ac839 1250 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1251 (long)CxONCE(cx));
760ac839 1252 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1253 cx->sb_orig);
146174a9
CB
1254 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1255 PTR2UV(cx->sb_dstr));
1256 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1257 PTR2UV(cx->sb_targ));
1258 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1259 PTR2UV(cx->sb_s));
1260 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1261 PTR2UV(cx->sb_m));
1262 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1263 PTR2UV(cx->sb_strend));
1264 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1265 PTR2UV(cx->sb_rxres));
8990e307
LW
1266 break;
1267 }
65e66c80 1268#else
96a5add6 1269 PERL_UNUSED_CONTEXT;
65e66c80 1270 PERL_UNUSED_ARG(cx);
17c3b450 1271#endif /* DEBUGGING */
35ff7856 1272}
241d1a3b
NC
1273
1274/*
1275 * Local variables:
1276 * c-indentation-style: bsd
1277 * c-basic-offset: 4
1278 * indent-tabs-mode: t
1279 * End:
1280 *
37442d52
RGS
1281 * ex: set ts=8 sts=4 sw=4 noet:
1282 */