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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
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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;
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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);
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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
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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);
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LW
131}
132
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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 }
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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
f1f99dc1 184 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv)) {
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
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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);
01433346 320 save_pushptrptr(SvREFCNT_inc_simple_NN(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
01433346
FC
337 save_pushptrptr(
338 SvREFCNT_inc_simple_NN(gv), (ohv = GvHVn(gv)), SAVEt_HV
339 );
79072805 340
4608196e 341 GvHV(gv) = NULL;
fb73857a 342 hv = GvHVn(gv);
0cbee0a4 343 if (SvMAGIC(ohv))
9711599e 344 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 345 return hv;
79072805
LW
346}
347
348void
864dbfa3 349Perl_save_item(pTHX_ register SV *item)
79072805 350{
97aff369 351 dVAR;
901017d6 352 register SV * const sv = newSVsv(item);
79072805 353
7918f24d
NC
354 PERL_ARGS_ASSERT_SAVE_ITEM;
355
e22024d3
NC
356 save_pushptrptr(item, /* remember the pointer */
357 sv, /* remember the value */
358 SAVEt_ITEM);
79072805
LW
359}
360
361void
1409bc06 362Perl_save_bool(pTHX_ bool *boolp)
79072805 363{
97aff369 364 dVAR;
7918f24d 365
1409bc06 366 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 367
65504245 368 SSCHECK(2);
1409bc06 369 SSPUSHPTR(boolp);
65504245 370 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
371}
372
7623d426
NC
373void
374Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
375{
376 dVAR;
377 SSCHECK(3);
378 SSPUSHINT(i);
379 SSPUSHPTR(ptr);
c6bf6a65 380 SSPUSHUV(type);
79072805
LW
381}
382
383void
1409bc06 384Perl_save_int(pTHX_ int *intp)
9febdf04 385{
97aff369 386 dVAR;
994d373a 387 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 388
1409bc06 389 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 390
994d373a
NC
391 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
392 SSCHECK(2);
393 SSPUSHPTR(intp);
394 SSPUSHUV(SAVEt_INT_SMALL | shifted);
395 } else
396 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
397}
398
399void
58188858
RGS
400Perl_save_I8(pTHX_ I8 *bytep)
401{
402 dVAR;
7918f24d
NC
403
404 PERL_ARGS_ASSERT_SAVE_I8;
405
6c61c2d4
NC
406 SSCHECK(2);
407 SSPUSHPTR(bytep);
408 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
409}
410
411void
87a84751
JH
412Perl_save_I16(pTHX_ I16 *intp)
413{
414 dVAR;
7918f24d
NC
415
416 PERL_ARGS_ASSERT_SAVE_I16;
417
c9441fce
NC
418 SSCHECK(2);
419 SSPUSHPTR(intp);
420 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
421}
422
423void
864dbfa3 424Perl_save_I32(pTHX_ I32 *intp)
79072805 425{
97aff369 426 dVAR;
89abef21 427 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
428
429 PERL_ARGS_ASSERT_SAVE_I32;
430
89abef21
NC
431 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
432 SSCHECK(2);
433 SSPUSHPTR(intp);
434 SSPUSHUV(SAVEt_I32_SMALL | shifted);
435 } else
436 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
437}
438
85e6fe83
LW
439/* Cannot use save_sptr() to store a char* since the SV** cast will
440 * force word-alignment and we'll miss the pointer.
441 */
442void
864dbfa3 443Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 444{
97aff369 445 dVAR;
7918f24d
NC
446
447 PERL_ARGS_ASSERT_SAVE_PPTR;
448
e22024d3 449 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
450}
451
79072805 452void
146174a9
CB
453Perl_save_vptr(pTHX_ void *ptr)
454{
97aff369 455 dVAR;
7918f24d
NC
456
457 PERL_ARGS_ASSERT_SAVE_VPTR;
458
e22024d3 459 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
460}
461
462void
864dbfa3 463Perl_save_sptr(pTHX_ SV **sptr)
79072805 464{
97aff369 465 dVAR;
7918f24d
NC
466
467 PERL_ARGS_ASSERT_SAVE_SPTR;
468
e22024d3 469 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
470}
471
c3564e5c 472void
09edbca0 473Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 474{
97aff369 475 dVAR;
c3564e5c 476 SSCHECK(4);
f3548bdc 477 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 478 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 479 SSPUSHPTR(PL_comppad);
c3564e5c 480 SSPUSHLONG((long)off);
c6bf6a65 481 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
482}
483
79072805 484void
864dbfa3 485Perl_save_hptr(pTHX_ HV **hptr)
79072805 486{
97aff369 487 dVAR;
7918f24d
NC
488
489 PERL_ARGS_ASSERT_SAVE_HPTR;
490
e22024d3 491 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
492}
493
494void
864dbfa3 495Perl_save_aptr(pTHX_ AV **aptr)
79072805 496{
97aff369 497 dVAR;
7918f24d
NC
498
499 PERL_ARGS_ASSERT_SAVE_APTR;
500
e22024d3 501 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
502}
503
504void
2fd8beea 505Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 506{
97aff369 507 dVAR;
8990e307 508 SSCHECK(2);
2fd8beea 509 SSPUSHPTR(ptr);
c6bf6a65 510 SSPUSHUV(type);
8990e307
LW
511}
512
513void
864dbfa3 514Perl_save_clearsv(pTHX_ SV **svp)
8990e307 515{
97aff369 516 dVAR;
cdcdfc56
NC
517 const UV offset = svp - PL_curpad;
518 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
519
520 PERL_ARGS_ASSERT_SAVE_CLEARSV;
521
f3548bdc 522 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
523 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
524 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
525 offset, svp, PL_curpad);
526
527 SSCHECK(1);
528 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 529 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
530}
531
532void
864dbfa3 533Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 534{
97aff369 535 dVAR;
7918f24d
NC
536
537 PERL_ARGS_ASSERT_SAVE_DELETE;
538
85a721ca 539 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
540}
541
542void
af097752
VP
543Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
544{
545 STRLEN len;
546 I32 klen;
547 const char *key;
548
549 PERL_ARGS_ASSERT_SAVE_HDELETE;
550
551 key = SvPV_const(keysv, len);
552 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
553 SvREFCNT_inc_simple_void_NN(hv);
554 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
555}
556
557void
c68ec7a9
VP
558Perl_save_adelete(pTHX_ AV *av, I32 key)
559{
560 dVAR;
561
562 PERL_ARGS_ASSERT_SAVE_ADELETE;
563
564 SvREFCNT_inc_void(av);
565 save_pushi32ptr(key, av, SAVEt_ADELETE);
566}
567
568void
12ab1f58
JH
569Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
570{
571 dVAR;
7918f24d
NC
572
573 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
574
12ab1f58
JH
575 SSCHECK(3);
576 SSPUSHDPTR(f);
577 SSPUSHPTR(p);
c6bf6a65 578 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
579}
580
581void
146174a9
CB
582Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
583{
97aff369 584 dVAR;
146174a9
CB
585 SSCHECK(3);
586 SSPUSHDXPTR(f);
587 SSPUSHPTR(p);
c6bf6a65 588 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
589}
590
591void
da8315f8
NC
592Perl_save_hints(pTHX)
593{
594 dVAR;
20439bc7 595 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 596 if (PL_hints & HINT_LOCALIZE_HH) {
52c7aca6
FC
597 HV *oldhh = GvHV(PL_hintgv);
598 save_pushptri32ptr(oldhh, PL_hints, save_cophh, SAVEt_HINTS);
599 GvHV(PL_hintgv) = NULL; /* in case copying dies */
600 GvHV(PL_hintgv) = hv_copy_hints_hv(oldhh);
be84297e 601 } else {
20439bc7 602 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 603 }
be84297e
NC
604}
605
606static void
607S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
608 const int type)
609{
610 SSCHECK(4);
611 SSPUSHPTR(ptr1);
612 SSPUSHINT(i);
613 SSPUSHPTR(ptr2);
c6bf6a65 614 SSPUSHUV(type);
da8315f8
NC
615}
616
617void
91d1c79f 618Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 619{
97aff369 620 dVAR;
bfc4de9f 621 SV *sv;
7918f24d 622
91d1c79f 623 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 624
0cbee0a4 625 SvGETMAGIC(*sptr);
be84297e
NC
626 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
627 SAVEt_AELEM);
5dd42e15
DM
628 /* if it gets reified later, the restore will have the wrong refcnt */
629 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 630 SvREFCNT_inc_void(*sptr);
91d1c79f 631 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
632 if (flags & SAVEf_KEEPOLDELEM)
633 return;
bfc4de9f
DM
634 sv = *sptr;
635 /* If we're localizing a tied array element, this new sv
636 * won't actually be stored in the array - so it won't get
637 * reaped when the localize ends. Ensure it gets reaped by
638 * mortifying it instead. DAPM */
daeb922a 639 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 640 sv_2mortal(sv);
4e4c362e
GS
641}
642
643void
af7df257 644Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 645{
97aff369 646 dVAR;
bfc4de9f 647 SV *sv;
7918f24d 648
af7df257 649 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 650
0cbee0a4 651 SvGETMAGIC(*sptr);
4e4c362e 652 SSCHECK(4);
b37c2d43 653 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 654 SSPUSHPTR(newSVsv(key));
4e4c362e 655 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 656 SSPUSHUV(SAVEt_HELEM);
af7df257 657 save_scalar_at(sptr, flags);
75d34a09
VP
658 if (flags & SAVEf_KEEPOLDELEM)
659 return;
bfc4de9f
DM
660 sv = *sptr;
661 /* If we're localizing a tied hash element, this new sv
662 * won't actually be stored in the hash - so it won't get
663 * reaped when the localize ends. Ensure it gets reaped by
664 * mortifying it instead. DAPM */
daeb922a 665 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 666 sv_2mortal(sv);
4e4c362e
GS
667}
668
2053acbf
NC
669SV*
670Perl_save_svref(pTHX_ SV **sptr)
671{
672 dVAR;
7918f24d
NC
673
674 PERL_ARGS_ASSERT_SAVE_SVREF;
675
2053acbf 676 SvGETMAGIC(*sptr);
e22024d3 677 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 678 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
679}
680
455ece5e 681I32
864dbfa3 682Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 683{
97aff369 684 dVAR;
35a4481c 685 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 686 - (char*)PL_savestack);
1be36ce0
NC
687 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
688 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 689
1be36ce0
NC
690 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
691 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
692 elems, size, pad);
693
694 SSGROW(elems + 1);
455ece5e
AD
695
696 PL_savestack_ix += elems;
1be36ce0 697 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
698 return start;
699}
700
462e5cf6 701void
864dbfa3 702Perl_leave_scope(pTHX_ I32 base)
79072805 703{
97aff369 704 dVAR;
79072805
LW
705 register SV *sv;
706 register SV *value;
707 register GV *gv;
708 register AV *av;
709 register HV *hv;
20454177 710 void* ptr;
f4dd75d9 711 register char* str;
161b7d16 712 I32 i;
302c0c93 713 /* Localise the effects of the TAINT_NOT inside the loop. */
b6f93e7a 714 bool was = PL_tainted;
79072805
LW
715
716 if (base < -1)
cea2e8a9 717 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
718 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
719 (long)PL_savestack_ix, (long)base));
3280af22 720 while (PL_savestack_ix > base) {
c6bf6a65
NC
721 UV uv = SSPOPUV;
722 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
723 TAINT_NOT;
724
c6bf6a65 725 switch (type) {
79072805 726 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
727 value = MUTABLE_SV(SSPOPPTR);
728 sv = MUTABLE_SV(SSPOPPTR);
79072805 729 sv_replace(sv,value);
3280af22 730 PL_localizing = 2;
79072805 731 SvSETMAGIC(sv);
3280af22 732 PL_localizing = 0;
79072805 733 break;
8aacddc1 734 case SAVEt_SV: /* scalar reference */
ad64d0ec 735 value = MUTABLE_SV(SSPOPPTR);
159b6efe 736 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 737 ptr = &GvSV(gv);
502c6561 738 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
739 restore_sv:
740 sv = *(SV**)ptr;
2053acbf
NC
741 *(SV**)ptr = value;
742 SvREFCNT_dec(sv);
743 PL_localizing = 2;
744 SvSETMAGIC(value);
745 PL_localizing = 0;
746 SvREFCNT_dec(value);
9bfbb681 747 SvREFCNT_dec(av); /* av may actually be an AV, HV or GV */
2053acbf 748 break;
8aacddc1 749 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 750 ptr = SSPOPPTR;
b03d03b0 751 str = (char*)SSPOPPTR;
f4dd75d9
GS
752 if (*(char**)ptr != str) {
753 Safefree(*(char**)ptr);
754 *(char**)ptr = str;
755 }
756 break;
05ec9bb3
NIS
757 case SAVEt_SHARED_PVREF: /* shared pv */
758 str = (char*)SSPOPPTR;
759 ptr = SSPOPPTR;
760 if (*(char**)ptr != str) {
5e54c26f 761#ifdef NETWARE
9ecbcc42 762 PerlMem_free(*(char**)ptr);
5e54c26f 763#else
05ec9bb3 764 PerlMemShared_free(*(char**)ptr);
5e54c26f 765#endif
05ec9bb3
NIS
766 *(char**)ptr = str;
767 }
768 break;
f83b46a0
DM
769 case SAVEt_GVSV: /* scalar slot in GV */
770 value = MUTABLE_SV(SSPOPPTR);
771 gv = MUTABLE_GV(SSPOPPTR);
772 ptr = &GvSV(gv);
773 goto restore_svp;
8aacddc1 774 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 775 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 776 ptr = SSPOPPTR;
f83b46a0 777 restore_svp:
f4dd75d9
GS
778 sv = *(SV**)ptr;
779 *(SV**)ptr = value;
780 SvREFCNT_dec(sv);
b9d12d37
GS
781 SvREFCNT_dec(value);
782 break;
8aacddc1 783 case SAVEt_AV: /* array reference */
502c6561 784 av = MUTABLE_AV(SSPOPPTR);
159b6efe 785 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 786 SvREFCNT_dec(GvAV(gv));
8aacddc1 787 GvAV(gv) = av;
fb73857a 788 if (SvMAGICAL(av)) {
3280af22 789 PL_localizing = 2;
ad64d0ec 790 SvSETMAGIC(MUTABLE_SV(av));
3280af22 791 PL_localizing = 0;
fb73857a 792 }
01433346 793 SvREFCNT_dec(gv);
8aacddc1
NIS
794 break;
795 case SAVEt_HV: /* hash reference */
85fbaab2 796 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 797 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 798 SvREFCNT_dec(GvHV(gv));
8aacddc1 799 GvHV(gv) = hv;
fb73857a 800 if (SvMAGICAL(hv)) {
3280af22 801 PL_localizing = 2;
ad64d0ec 802 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 803 PL_localizing = 0;
fb73857a 804 }
01433346 805 SvREFCNT_dec(gv);
8aacddc1 806 break;
994d373a
NC
807 case SAVEt_INT_SMALL:
808 ptr = SSPOPPTR;
809 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
810 break;
79072805
LW
811 case SAVEt_INT: /* int reference */
812 ptr = SSPOPPTR;
813 *(int*)ptr = (int)SSPOPINT;
814 break;
9febdf04
RH
815 case SAVEt_BOOL: /* bool reference */
816 ptr = SSPOPPTR;
65504245 817 *(bool*)ptr = cBOOL(uv >> 8);
b6f93e7a
KW
818
819 if (ptr == &PL_tainted) {
820 /* If we don't update <was>, to reflect what was saved on the
821 * stack for PL_tainted, then we will overwrite this attempt to
822 * restore it when we exit this routine. Note that this won't
823 * work if this value was saved in a wider-than necessary type,
824 * such as I32 */
825 was = *(bool*)ptr;
826 }
9febdf04 827 break;
89abef21
NC
828 case SAVEt_I32_SMALL:
829 ptr = SSPOPPTR;
830 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
831 break;
79072805
LW
832 case SAVEt_I32: /* I32 reference */
833 ptr = SSPOPPTR;
3235b7a3
NC
834#ifdef PERL_DEBUG_READONLY_OPS
835 {
836 const I32 val = SSPOPINT;
837 if (*(I32*)ptr != val)
838 *(I32*)ptr = val;
839 }
840#else
79072805 841 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 842#endif
79072805
LW
843 break;
844 case SAVEt_SPTR: /* SV* reference */
845 ptr = SSPOPPTR;
ad64d0ec 846 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 847 break;
146174a9 848 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
849 case SAVEt_PPTR: /* char* reference */
850 ptr = SSPOPPTR;
851 *(char**)ptr = (char*)SSPOPPTR;
852 break;
79072805
LW
853 case SAVEt_HPTR: /* HV* reference */
854 ptr = SSPOPPTR;
85fbaab2 855 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
856 break;
857 case SAVEt_APTR: /* AV* reference */
858 ptr = SSPOPPTR;
502c6561 859 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 860 break;
fb73857a 861 case SAVEt_GP: /* scalar reference */
10507e11 862 ptr = SSPOPPTR;
159b6efe 863 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 864 gp_free(gv);
c43ae56f 865 GvGP_set(gv, (GP*)ptr);
dd69841b 866 /* putting a method back into circulation ("local")*/
00169e2c 867 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvENAME_get(hv))
dd69841b 868 mro_method_changed_in(hv);
4633a7c4 869 SvREFCNT_dec(gv);
8aacddc1 870 break;
8990e307
LW
871 case SAVEt_FREESV:
872 ptr = SSPOPPTR;
ad64d0ec 873 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 874 break;
3987a177
Z
875 case SAVEt_FREECOPHH:
876 ptr = SSPOPPTR;
877 cophh_free((COPHH *)ptr);
878 break;
26d9b02f
JH
879 case SAVEt_MORTALIZESV:
880 ptr = SSPOPPTR;
ad64d0ec 881 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 882 break;
8990e307
LW
883 case SAVEt_FREEOP:
884 ptr = SSPOPPTR;
f3548bdc 885 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
886 op_free((OP*)ptr);
887 break;
888 case SAVEt_FREEPV:
889 ptr = SSPOPPTR;
1df70142 890 Safefree(ptr);
8990e307
LW
891 break;
892 case SAVEt_CLEARSV:
cdcdfc56 893 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 894 sv = *(SV**)ptr;
dd2155a4
DM
895
896 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
897 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
898 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
899 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
900 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
901 ));
902
bc44cdaf
GS
903 /* Can clear pad variable in place? */
904 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
905 /*
906 * if a my variable that was made readonly is going out of
907 * scope, we want to remove the readonlyness so that it can
908 * go out of scope quietly
8aacddc1 909 */
a26e96df 910 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
911 SvREADONLY_off(sv);
912
6fc92669 913 if (SvTHINKFIRST(sv))
840a7b70 914 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
9c3f0156
FC
915 if (SvTYPE(sv) == SVt_PVHV)
916 Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv));
a0d0e21e 917 if (SvMAGICAL(sv))
9c3f0156 918 sv_unmagic(sv, PERL_MAGIC_backref),
a0d0e21e 919 mg_free(sv);
8990e307
LW
920
921 switch (SvTYPE(sv)) {
922 case SVt_NULL:
923 break;
924 case SVt_PVAV:
502c6561 925 av_clear(MUTABLE_AV(sv));
8990e307
LW
926 break;
927 case SVt_PVHV:
85fbaab2 928 hv_clear(MUTABLE_HV(sv));
8990e307
LW
929 break;
930 case SVt_PVCV:
cea2e8a9 931 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 932 default:
0c34ef67 933 SvOK_off(sv);
8990e307
LW
934 break;
935 }
d9d18af6 936 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
937 }
938 else { /* Someone has a claim on this, so abandon it. */
9a214eec
DM
939 assert( SvFLAGS(sv) & SVs_PADMY);
940 assert(!(SvFLAGS(sv) & SVs_PADTMP));
8990e307 941 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
942 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
943 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 944 default: *(SV**)ptr = newSV(0); break;
8990e307 945 }
53868620 946 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
947 /* preserve pad nature, but also mark as not live
948 * for any closure capturing */
9a214eec 949 SvFLAGS(*(SV**)ptr) |= (SVs_PADMY|SVs_PADSTALE);
8990e307
LW
950 }
951 break;
952 case SAVEt_DELETE:
953 ptr = SSPOPPTR;
85fbaab2 954 hv = MUTABLE_HV(ptr);
35d4f826 955 i = SSPOPINT;
8990e307 956 ptr = SSPOPPTR;
35d4f826 957 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 958 SvREFCNT_dec(hv);
8aacddc1 959 Safefree(ptr);
8990e307 960 break;
c68ec7a9
VP
961 case SAVEt_ADELETE:
962 ptr = SSPOPPTR;
963 av = MUTABLE_AV(ptr);
964 i = SSPOPINT;
965 (void)av_delete(av, i, G_DISCARD);
966 SvREFCNT_dec(av);
967 break;
146174a9
CB
968 case SAVEt_DESTRUCTOR_X:
969 ptr = SSPOPPTR;
acfe0abc 970 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
971 break;
972 case SAVEt_REGCONTEXT:
e0fa7e2b 973 /* regexp must have croaked */
455ece5e 974 case SAVEt_ALLOC:
1be36ce0 975 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 976 break;
55497cff 977 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 978 i = SSPOPINT;
3280af22 979 PL_stack_sp = PL_stack_base + i;
55497cff 980 break;
ea8d6ae1
DB
981 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
982 i = SSPOPINT;
983 cxstack[i].blk_oldsp = SSPOPINT;
984 break;
161b7d16 985 case SAVEt_AELEM: /* array element */
ad64d0ec 986 value = MUTABLE_SV(SSPOPPTR);
161b7d16 987 i = SSPOPINT;
502c6561 988 av = MUTABLE_AV(SSPOPPTR);
658aef79 989 ptr = av_fetch(av,i,1);
5dd42e15
DM
990 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
991 SvREFCNT_dec(value);
4e4c362e
GS
992 if (ptr) {
993 sv = *(SV**)ptr;
3280af22 994 if (sv && sv != &PL_sv_undef) {
ad64d0ec 995 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 996 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
997 goto restore_sv;
998 }
999 }
1000 SvREFCNT_dec(av);
1001 SvREFCNT_dec(value);
1002 break;
161b7d16 1003 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
1004 value = MUTABLE_SV(SSPOPPTR);
1005 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 1006 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 1007 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 1008 SvREFCNT_dec(sv);
4e4c362e 1009 if (ptr) {
35a4481c 1010 const SV * const oval = HeVAL((HE*)ptr);
3280af22 1011 if (oval && oval != &PL_sv_undef) {
4e4c362e 1012 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1013 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1014 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1015 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1016 goto restore_sv;
1017 }
1018 }
1019 SvREFCNT_dec(hv);
4e4c362e
GS
1020 SvREFCNT_dec(value);
1021 break;
462e5cf6 1022 case SAVEt_OP:
533c011a 1023 PL_op = (OP*)SSPOPPTR;
462e5cf6 1024 break;
25eaa213 1025 case SAVEt_HINTS:
045ac317 1026 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 1027 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
1028 GvHV(PL_hintgv) = NULL;
1029 }
20439bc7
Z
1030 cophh_free(CopHINTHASH_get(&PL_compiling));
1031 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1032 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1033 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1034 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1035 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1036 assert(GvHV(PL_hintgv));
1037 } else if (!GvHV(PL_hintgv)) {
1038 /* Need to add a new one manually, else gv_fetchpv() can
1039 add one in this code:
1040
1041 if (SvTYPE(gv) == SVt_PVGV) {
1042 if (add) {
1043 GvMULTI_on(gv);
1044 gv_init_sv(gv, sv_type);
1045 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1046 require_errno(gv);
1047 }
1048 return gv;
1049 }
1050
1051 and it won't have the magic set. */
1052
1053 HV *const hv = newHV();
1054 hv_magic(hv, NULL, PERL_MAGIC_hints);
1055 GvHV(PL_hintgv) = hv;
dfa41748 1056 }
5b9c0671 1057 assert(GvHV(PL_hintgv));
b3ac6de7 1058 break;
cb50131a 1059 case SAVEt_COMPPAD:
f3548bdc 1060 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1061 if (PL_comppad)
cb50131a
CB
1062 PL_curpad = AvARRAY(PL_comppad);
1063 else
4608196e 1064 PL_curpad = NULL;
cb50131a 1065 break;
09edbca0 1066 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1067 {
35a4481c 1068 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1069 SV **svp;
c3564e5c 1070 ptr = SSPOPPTR;
09edbca0
NC
1071 assert (ptr);
1072 svp = AvARRAY((PAD*)ptr) + off;
1073 /* This mortalizing used to be done by POPLOOP() via itersave.
1074 But as we have all the information here, we can do it here,
1075 save even having to have itersave in the struct. */
1076 sv_2mortal(*svp);
ad64d0ec 1077 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1078 }
1079 break;
8b7059b1
DM
1080 case SAVEt_SAVESWITCHSTACK:
1081 {
1082 dSP;
502c6561
NC
1083 AV *const t = MUTABLE_AV(SSPOPPTR);
1084 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1085 SWITCHSTACK(t,f);
1086 PL_curstackinfo->si_stack = f;
1087 }
1088 break;
14f338dc
DM
1089 case SAVEt_SET_SVFLAGS:
1090 {
35a4481c
AL
1091 const U32 val = (U32)SSPOPINT;
1092 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1093 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1094 SvFLAGS(sv) &= ~mask;
1095 SvFLAGS(sv) |= val;
1096 }
1097 break;
95e06916
NC
1098
1099 /* This would be a mathom, but Perl_save_svref() calls a static
1100 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1101 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1102 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1103 ptr = SSPOPPTR;
1104 av = NULL; /* what to refcnt_dec */
1105 goto restore_sv;
95e06916
NC
1106
1107 /* These are only saved in mathoms.c */
1108 case SAVEt_NSTAB:
159b6efe 1109 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1110 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1111 break;
2053acbf
NC
1112 case SAVEt_LONG: /* long reference */
1113 ptr = SSPOPPTR;
1114 *(long*)ptr = (long)SSPOPLONG;
1115 break;
95e06916
NC
1116 case SAVEt_IV: /* IV reference */
1117 ptr = SSPOPPTR;
1118 *(IV*)ptr = (IV)SSPOPIV;
1119 break;
1120
2053acbf
NC
1121 case SAVEt_I16: /* I16 reference */
1122 ptr = SSPOPPTR;
c9441fce 1123 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1124 break;
1125 case SAVEt_I8: /* I8 reference */
1126 ptr = SSPOPPTR;
6c61c2d4 1127 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1128 break;
2053acbf
NC
1129 case SAVEt_DESTRUCTOR:
1130 ptr = SSPOPPTR;
1131 (*SSPOPDPTR)(ptr);
1132 break;
68da3b2f
NC
1133 case SAVEt_COMPILE_WARNINGS:
1134 ptr = SSPOPPTR;
72dc9ed5 1135
68da3b2f
NC
1136 if (!specialWARN(PL_compiling.cop_warnings))
1137 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1138
10edeb5d 1139 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1140 break;
1ade1aa1
NC
1141 case SAVEt_RE_STATE:
1142 {
1143 const struct re_save_state *const state
1144 = (struct re_save_state *)
1145 (PL_savestack + PL_savestack_ix
1146 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1147 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1148
1ade1aa1
NC
1149 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1150 Safefree(PL_reg_start_tmp);
1ade1aa1 1151 }
1ade1aa1
NC
1152 if (PL_reg_poscache != state->re_state_reg_poscache) {
1153 Safefree(PL_reg_poscache);
1ade1aa1 1154 }
46ab3289 1155 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1156 }
1157 break;
7c197c94
DM
1158 case SAVEt_PARSER:
1159 ptr = SSPOPPTR;
1160 parser_free((yy_parser *) ptr);
1161 break;
79072805 1162 default:
cea2e8a9 1163 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1164 }
1165 }
302c0c93
NC
1166
1167 PL_tainted = was;
f410a211
NC
1168
1169 PERL_ASYNC_CHECK();
79072805 1170}
8990e307 1171
8990e307 1172void
864dbfa3 1173Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1174{
97aff369 1175 dVAR;
7918f24d
NC
1176
1177 PERL_ARGS_ASSERT_CX_DUMP;
1178
35ff7856 1179#ifdef DEBUGGING
22c35a8c 1180 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1181 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1182 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1183 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1184 PTR2UV(cx->blk_oldcop));
760ac839
LW
1185 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1186 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1187 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1188 PTR2UV(cx->blk_oldpm));
760ac839 1189 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1190 }
6b35e009 1191 switch (CxTYPE(cx)) {
8990e307
LW
1192 case CXt_NULL:
1193 case CXt_BLOCK:
1194 break;
146174a9 1195 case CXt_FORMAT:
f9c764c5
NC
1196 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1197 PTR2UV(cx->blk_format.cv));
1198 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_format.gv));
1200 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1201 PTR2UV(cx->blk_format.dfoutgv));
1202 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1203 (int)CxHASARGS(cx));
f9c764c5
NC
1204 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1205 PTR2UV(cx->blk_format.retop));
146174a9 1206 break;
8990e307 1207 case CXt_SUB:
146174a9
CB
1208 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1209 PTR2UV(cx->blk_sub.cv));
760ac839 1210 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1211 (long)cx->blk_sub.olddepth);
760ac839 1212 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1213 (int)CxHASARGS(cx));
1214 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1215 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1216 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1217 break;
1218 case CXt_EVAL:
760ac839 1219 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1220 (long)CxOLD_IN_EVAL(cx));
760ac839 1221 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1222 PL_op_name[CxOLD_OP_TYPE(cx)],
1223 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1224 if (cx->blk_eval.old_namesv)
1225 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1226 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1227 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1228 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1229 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1230 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1231 break;
1232
c6fdafd0 1233 case CXt_LOOP_LAZYIV:
d01136d6 1234 case CXt_LOOP_LAZYSV:
3b719c58
NC
1235 case CXt_LOOP_FOR:
1236 case CXt_LOOP_PLAIN:
0cbdab38 1237 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1238 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1239 (long)cx->blk_loop.resetsp);
022eaa24
NC
1240 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1241 PTR2UV(cx->blk_loop.my_op));
d01136d6 1242 /* XXX: not accurate for LAZYSV/IV */
146174a9 1243 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1244 PTR2UV(cx->blk_loop.state_u.ary.ary));
1245 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1246 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1247 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1248 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1249 break;
1250
1251 case CXt_SUBST:
760ac839 1252 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1253 (long)cx->sb_iters);
760ac839 1254 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1255 (long)cx->sb_maxiters);
35ef4773
GS
1256 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1257 (long)cx->sb_rflags);
760ac839 1258 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1259 (long)CxONCE(cx));
760ac839 1260 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1261 cx->sb_orig);
146174a9
CB
1262 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1263 PTR2UV(cx->sb_dstr));
1264 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1265 PTR2UV(cx->sb_targ));
1266 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1267 PTR2UV(cx->sb_s));
1268 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1269 PTR2UV(cx->sb_m));
1270 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1271 PTR2UV(cx->sb_strend));
1272 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1273 PTR2UV(cx->sb_rxres));
8990e307
LW
1274 break;
1275 }
65e66c80 1276#else
96a5add6 1277 PERL_UNUSED_CONTEXT;
65e66c80 1278 PERL_UNUSED_ARG(cx);
17c3b450 1279#endif /* DEBUGGING */
35ff7856 1280}
241d1a3b
NC
1281
1282/*
1283 * Local variables:
1284 * c-indentation-style: bsd
1285 * c-basic-offset: 4
1286 * indent-tabs-mode: t
1287 * End:
1288 *
37442d52
RGS
1289 * ex: set ts=8 sts=4 sw=4 noet:
1290 */