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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);
c09156bb 80 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
9965345d
JH
81 /* Without any kind of initialising deep enough recursion
82 * will end up reading uninitialised PERL_CONTEXTs. */
7e337ee0 83 PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
79072805
LW
84 return cxstack_ix + 1;
85}
86
79072805 87void
864dbfa3 88Perl_push_scope(pTHX)
79072805 89{
97aff369 90 dVAR;
3280af22
NIS
91 if (PL_scopestack_ix == PL_scopestack_max) {
92 PL_scopestack_max = GROW(PL_scopestack_max);
93 Renew(PL_scopestack, PL_scopestack_max, I32);
d343c3ef
GG
94#ifdef DEBUGGING
95 Renew(PL_scopestack_name, PL_scopestack_max, const char*);
520bb150 96#endif
79072805 97 }
d343c3ef
GG
98#ifdef DEBUGGING
99 PL_scopestack_name[PL_scopestack_ix] = "unknown";
100#endif
3280af22 101 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
79072805
LW
102
103}
104
105void
864dbfa3 106Perl_pop_scope(pTHX)
79072805 107{
97aff369 108 dVAR;
35a4481c 109 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
8990e307 110 LEAVE_SCOPE(oldsave);
79072805
LW
111}
112
113void
864dbfa3 114Perl_markstack_grow(pTHX)
a0d0e21e 115{
97aff369 116 dVAR;
35a4481c
AL
117 const I32 oldmax = PL_markstack_max - PL_markstack;
118 const I32 newmax = GROW(oldmax);
a0d0e21e 119
3280af22
NIS
120 Renew(PL_markstack, newmax, I32);
121 PL_markstack_ptr = PL_markstack + oldmax;
122 PL_markstack_max = PL_markstack + newmax;
a0d0e21e
LW
123}
124
125void
864dbfa3 126Perl_savestack_grow(pTHX)
79072805 127{
97aff369 128 dVAR;
8aacddc1 129 PL_savestack_max = GROW(PL_savestack_max) + 4;
3280af22 130 Renew(PL_savestack, PL_savestack_max, ANY);
79072805
LW
131}
132
4b3c1a47
AE
133void
134Perl_savestack_grow_cnt(pTHX_ I32 need)
135{
97aff369 136 dVAR;
4b3c1a47
AE
137 PL_savestack_max = PL_savestack_ix + need;
138 Renew(PL_savestack, PL_savestack_max, ANY);
139}
140
2ce36478
SM
141#undef GROW
142
79072805 143void
864dbfa3 144Perl_tmps_grow(pTHX_ I32 n)
677b06e3 145{
97aff369 146 dVAR;
677b06e3
GS
147#ifndef STRESS_REALLOC
148 if (n < 128)
149 n = (PL_tmps_max < 512) ? 128 : 512;
150#endif
151 PL_tmps_max = PL_tmps_ix + n + 1;
152 Renew(PL_tmps_stack, PL_tmps_max, SV*);
153}
154
155
156void
864dbfa3 157Perl_free_tmps(pTHX)
79072805 158{
97aff369 159 dVAR;
79072805 160 /* XXX should tmps_floor live in cxstack? */
35a4481c 161 const I32 myfloor = PL_tmps_floor;
3280af22 162 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
901017d6 163 SV* const sv = PL_tmps_stack[PL_tmps_ix];
a0714e2c 164 PL_tmps_stack[PL_tmps_ix--] = NULL;
8aacddc1 165 if (sv && sv != &PL_sv_undef) {
463ee0b2 166 SvTEMP_off(sv);
8990e307 167 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 168 }
79072805
LW
169 }
170}
171
76e3520e 172STATIC SV *
af7df257 173S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 174{
97aff369 175 dVAR;
75d34a09
VP
176 SV * osv;
177 register SV *sv;
79072805 178
7918f24d
NC
179 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
180
75d34a09
VP
181 osv = *sptr;
182 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
183
a0d0e21e 184 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
a0d0e21e 185 if (SvGMAGICAL(osv)) {
35a4481c 186 const bool oldtainted = PL_tainted;
a0d0e21e 187 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 188 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
3280af22 189 PL_tainted = oldtainted;
a0d0e21e 190 }
75d34a09
VP
191 if (!(flags & SAVEf_KEEPOLDELEM))
192 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
79072805 193 }
75d34a09 194
79072805
LW
195 return sv;
196}
197
dfcd3de5
NC
198void
199Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
200{
201 dVAR;
202 SSCHECK(3);
203 SSPUSHPTR(ptr1);
204 SSPUSHPTR(ptr2);
c6bf6a65 205 SSPUSHUV(type);
e22024d3
NC
206}
207
7a4c00b4 208SV *
864dbfa3 209Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 210{
97aff369 211 dVAR;
fb4fc1fa 212 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
213
214 PERL_ARGS_ASSERT_SAVE_SCALAR;
215
27cc343c 216 PL_localizing = 1;
0cbee0a4 217 SvGETMAGIC(*sptr);
27cc343c 218 PL_localizing = 0;
e22024d3 219 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 220 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
221}
222
f4dd75d9 223/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
224 * restore a global SV to its prior contents, freeing new value. */
225void
864dbfa3 226Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 227{
97aff369 228 dVAR;
7918f24d
NC
229
230 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
231
e22024d3 232 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
233}
234
f4dd75d9
GS
235/* Like save_pptr(), but also Safefree()s the new value if it is different
236 * from the old one. Can be used to restore a global char* to its prior
237 * contents, freeing new value. */
238void
239Perl_save_generic_pvref(pTHX_ char **str)
240{
97aff369 241 dVAR;
7918f24d
NC
242
243 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
244
e22024d3 245 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
246}
247
05ec9bb3
NIS
248/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
249 * Can be used to restore a shared global char* to its prior
250 * contents, freeing new value. */
251void
252Perl_save_shared_pvref(pTHX_ char **str)
253{
97aff369 254 dVAR;
7918f24d
NC
255
256 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
257
e22024d3 258 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
259}
260
14f338dc
DM
261/* set the SvFLAGS specified by mask to the values in val */
262
263void
264Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
265{
97aff369 266 dVAR;
7918f24d
NC
267
268 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
269
14f338dc
DM
270 SSCHECK(4);
271 SSPUSHPTR(sv);
272 SSPUSHINT(mask);
273 SSPUSHINT(val);
c6bf6a65 274 SSPUSHUV(SAVEt_SET_SVFLAGS);
14f338dc
DM
275}
276
79072805 277void
864dbfa3 278Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 279{
97aff369 280 dVAR;
7918f24d
NC
281
282 PERL_ARGS_ASSERT_SAVE_GP;
283
b9e00b79
LRG
284 SSCHECK(4);
285 SSPUSHINT(SvFAKE(gv));
286 SSPUSHPTR(GvGP(gv));
287 SSPUSHPTR(SvREFCNT_inc(gv));
86e10ae1 288 SSPUSHUV(SAVEt_GP);
b9e00b79
LRG
289
290 /* Don't let the localized GV coerce into non-glob, otherwise we would
291 * not be able to restore GP upon leave from context if that happened */
292 SvFAKE_off(gv);
79072805 293
5f05dabc 294 if (empty) {
12816592 295 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 296
fae75791 297 if (GvCVu(gv))
e1a479c5 298 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
299 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
300 gp->gp_io = newIO();
301 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
302 }
72651472
NC
303#ifdef PERL_DONT_CREATE_GVSV
304 if (gv == PL_errgv) {
305 /* We could scatter this logic everywhere by changing the
306 definition of ERRSV from GvSV() to GvSVn(), but it seems more
307 efficient to do this check once here. */
308 gp->gp_sv = newSV(0);
309 }
310#endif
12816592 311 GvGP(gv) = gp;
5f05dabc
PP
312 }
313 else {
44a8e56a 314 gp_ref(GvGP(gv));
5f05dabc
PP
315 GvINTRO_on(gv);
316 }
79072805 317}
79072805 318
79072805 319AV *
864dbfa3 320Perl_save_ary(pTHX_ GV *gv)
79072805 321{
97aff369 322 dVAR;
901017d6 323 AV * const oav = GvAVn(gv);
67a38de0 324 AV *av;
fb73857a 325
7918f24d
NC
326 PERL_ARGS_ASSERT_SAVE_ARY;
327
67a38de0
NIS
328 if (!AvREAL(oav) && AvREIFY(oav))
329 av_reify(oav);
e22024d3 330 save_pushptrptr(gv, oav, SAVEt_AV);
79072805 331
4608196e 332 GvAV(gv) = NULL;
fb73857a 333 av = GvAVn(gv);
0cbee0a4 334 if (SvMAGIC(oav))
9711599e 335 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 336 return av;
79072805
LW
337}
338
339HV *
864dbfa3 340Perl_save_hash(pTHX_ GV *gv)
79072805 341{
97aff369 342 dVAR;
fb73857a
PP
343 HV *ohv, *hv;
344
7918f24d
NC
345 PERL_ARGS_ASSERT_SAVE_HASH;
346
e22024d3 347 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
79072805 348
4608196e 349 GvHV(gv) = NULL;
fb73857a 350 hv = GvHVn(gv);
0cbee0a4 351 if (SvMAGIC(ohv))
9711599e 352 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 353 return hv;
79072805
LW
354}
355
356void
864dbfa3 357Perl_save_item(pTHX_ register SV *item)
79072805 358{
97aff369 359 dVAR;
901017d6 360 register SV * const sv = newSVsv(item);
79072805 361
7918f24d
NC
362 PERL_ARGS_ASSERT_SAVE_ITEM;
363
e22024d3
NC
364 save_pushptrptr(item, /* remember the pointer */
365 sv, /* remember the value */
366 SAVEt_ITEM);
79072805
LW
367}
368
369void
1409bc06 370Perl_save_bool(pTHX_ bool *boolp)
79072805 371{
97aff369 372 dVAR;
7918f24d 373
1409bc06 374 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 375
65504245 376 SSCHECK(2);
1409bc06 377 SSPUSHPTR(boolp);
65504245 378 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
379}
380
7623d426
NC
381void
382Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
383{
384 dVAR;
385 SSCHECK(3);
386 SSPUSHINT(i);
387 SSPUSHPTR(ptr);
c6bf6a65 388 SSPUSHUV(type);
79072805
LW
389}
390
391void
1409bc06 392Perl_save_int(pTHX_ int *intp)
9febdf04 393{
97aff369 394 dVAR;
7918f24d 395
1409bc06 396 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 397
1409bc06 398 save_pushi32ptr(*intp, intp, SAVEt_INT);
9febdf04
RH
399}
400
401void
58188858
RGS
402Perl_save_I8(pTHX_ I8 *bytep)
403{
404 dVAR;
7918f24d
NC
405
406 PERL_ARGS_ASSERT_SAVE_I8;
407
1409bc06 408 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
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
1409bc06 418 save_pushi32ptr(*intp, intp, SAVEt_I16);
87a84751
JH
419}
420
421void
864dbfa3 422Perl_save_I32(pTHX_ I32 *intp)
79072805 423{
97aff369 424 dVAR;
7918f24d
NC
425
426 PERL_ARGS_ASSERT_SAVE_I32;
427
1409bc06 428 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
429}
430
85e6fe83
LW
431/* Cannot use save_sptr() to store a char* since the SV** cast will
432 * force word-alignment and we'll miss the pointer.
433 */
434void
864dbfa3 435Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 436{
97aff369 437 dVAR;
7918f24d
NC
438
439 PERL_ARGS_ASSERT_SAVE_PPTR;
440
e22024d3 441 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
442}
443
79072805 444void
146174a9
CB
445Perl_save_vptr(pTHX_ void *ptr)
446{
97aff369 447 dVAR;
7918f24d
NC
448
449 PERL_ARGS_ASSERT_SAVE_VPTR;
450
e22024d3 451 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
452}
453
454void
864dbfa3 455Perl_save_sptr(pTHX_ SV **sptr)
79072805 456{
97aff369 457 dVAR;
7918f24d
NC
458
459 PERL_ARGS_ASSERT_SAVE_SPTR;
460
e22024d3 461 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
462}
463
c3564e5c 464void
09edbca0 465Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 466{
97aff369 467 dVAR;
c3564e5c 468 SSCHECK(4);
f3548bdc 469 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 470 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 471 SSPUSHPTR(PL_comppad);
c3564e5c 472 SSPUSHLONG((long)off);
c6bf6a65 473 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
474}
475
79072805 476void
864dbfa3 477Perl_save_hptr(pTHX_ HV **hptr)
79072805 478{
97aff369 479 dVAR;
7918f24d
NC
480
481 PERL_ARGS_ASSERT_SAVE_HPTR;
482
e22024d3 483 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
484}
485
486void
864dbfa3 487Perl_save_aptr(pTHX_ AV **aptr)
79072805 488{
97aff369 489 dVAR;
7918f24d
NC
490
491 PERL_ARGS_ASSERT_SAVE_APTR;
492
e22024d3 493 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
494}
495
496void
2fd8beea 497Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 498{
97aff369 499 dVAR;
8990e307 500 SSCHECK(2);
2fd8beea 501 SSPUSHPTR(ptr);
c6bf6a65 502 SSPUSHUV(type);
8990e307
LW
503}
504
505void
864dbfa3 506Perl_save_clearsv(pTHX_ SV **svp)
8990e307 507{
97aff369 508 dVAR;
cdcdfc56
NC
509 const UV offset = svp - PL_curpad;
510 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
511
512 PERL_ARGS_ASSERT_SAVE_CLEARSV;
513
f3548bdc 514 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
515 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
516 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
517 offset, svp, PL_curpad);
518
519 SSCHECK(1);
520 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 521 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
522}
523
524void
864dbfa3 525Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 526{
97aff369 527 dVAR;
7918f24d
NC
528
529 PERL_ARGS_ASSERT_SAVE_DELETE;
530
85a721ca 531 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
532}
533
534void
af097752
VP
535Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
536{
537 STRLEN len;
538 I32 klen;
539 const char *key;
540
541 PERL_ARGS_ASSERT_SAVE_HDELETE;
542
543 key = SvPV_const(keysv, len);
544 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
545 SvREFCNT_inc_simple_void_NN(hv);
546 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
547}
548
549void
c68ec7a9
VP
550Perl_save_adelete(pTHX_ AV *av, I32 key)
551{
552 dVAR;
553
554 PERL_ARGS_ASSERT_SAVE_ADELETE;
555
556 SvREFCNT_inc_void(av);
557 save_pushi32ptr(key, av, SAVEt_ADELETE);
558}
559
560void
12ab1f58
JH
561Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
562{
563 dVAR;
7918f24d
NC
564
565 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
566
12ab1f58
JH
567 SSCHECK(3);
568 SSPUSHDPTR(f);
569 SSPUSHPTR(p);
c6bf6a65 570 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
571}
572
573void
146174a9
CB
574Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
575{
97aff369 576 dVAR;
146174a9
CB
577 SSCHECK(3);
578 SSPUSHDXPTR(f);
579 SSPUSHPTR(p);
c6bf6a65 580 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
581}
582
583void
da8315f8
NC
584Perl_save_hints(pTHX)
585{
586 dVAR;
587 if (PL_compiling.cop_hints_hash) {
588 HINTS_REFCNT_LOCK;
589 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
590 HINTS_REFCNT_UNLOCK;
591 }
da8315f8 592 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
593 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
594 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 595 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
596 } else {
597 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 598 }
be84297e
NC
599}
600
601static void
602S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
603 const int type)
604{
605 SSCHECK(4);
606 SSPUSHPTR(ptr1);
607 SSPUSHINT(i);
608 SSPUSHPTR(ptr2);
c6bf6a65 609 SSPUSHUV(type);
da8315f8
NC
610}
611
612void
91d1c79f 613Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 614{
97aff369 615 dVAR;
bfc4de9f 616 SV *sv;
7918f24d 617
91d1c79f 618 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 619
0cbee0a4 620 SvGETMAGIC(*sptr);
be84297e
NC
621 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
622 SAVEt_AELEM);
5dd42e15
DM
623 /* if it gets reified later, the restore will have the wrong refcnt */
624 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 625 SvREFCNT_inc_void(*sptr);
91d1c79f 626 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
627 if (flags & SAVEf_KEEPOLDELEM)
628 return;
bfc4de9f
DM
629 sv = *sptr;
630 /* If we're localizing a tied array element, this new sv
631 * won't actually be stored in the array - so it won't get
632 * reaped when the localize ends. Ensure it gets reaped by
633 * mortifying it instead. DAPM */
daeb922a 634 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 635 sv_2mortal(sv);
4e4c362e
GS
636}
637
638void
af7df257 639Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 640{
97aff369 641 dVAR;
bfc4de9f 642 SV *sv;
7918f24d 643
af7df257 644 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 645
0cbee0a4 646 SvGETMAGIC(*sptr);
4e4c362e 647 SSCHECK(4);
b37c2d43 648 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 649 SSPUSHPTR(newSVsv(key));
4e4c362e 650 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 651 SSPUSHUV(SAVEt_HELEM);
af7df257 652 save_scalar_at(sptr, flags);
75d34a09
VP
653 if (flags & SAVEf_KEEPOLDELEM)
654 return;
bfc4de9f
DM
655 sv = *sptr;
656 /* If we're localizing a tied hash element, this new sv
657 * won't actually be stored in the hash - so it won't get
658 * reaped when the localize ends. Ensure it gets reaped by
659 * mortifying it instead. DAPM */
daeb922a 660 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 661 sv_2mortal(sv);
4e4c362e
GS
662}
663
2053acbf
NC
664SV*
665Perl_save_svref(pTHX_ SV **sptr)
666{
667 dVAR;
7918f24d
NC
668
669 PERL_ARGS_ASSERT_SAVE_SVREF;
670
2053acbf 671 SvGETMAGIC(*sptr);
e22024d3 672 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 673 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
674}
675
455ece5e 676I32
864dbfa3 677Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 678{
97aff369 679 dVAR;
35a4481c 680 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 681 - (char*)PL_savestack);
1be36ce0
NC
682 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
683 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 684
1be36ce0
NC
685 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
686 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
687 elems, size, pad);
688
689 SSGROW(elems + 1);
455ece5e
AD
690
691 PL_savestack_ix += elems;
1be36ce0 692 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
693 return start;
694}
695
462e5cf6 696void
864dbfa3 697Perl_leave_scope(pTHX_ I32 base)
79072805 698{
97aff369 699 dVAR;
79072805
LW
700 register SV *sv;
701 register SV *value;
702 register GV *gv;
703 register AV *av;
704 register HV *hv;
20454177 705 void* ptr;
f4dd75d9 706 register char* str;
161b7d16 707 I32 i;
302c0c93
NC
708 /* Localise the effects of the TAINT_NOT inside the loop. */
709 const bool was = PL_tainted;
79072805
LW
710
711 if (base < -1)
cea2e8a9 712 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
713 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
714 (long)PL_savestack_ix, (long)base));
3280af22 715 while (PL_savestack_ix > base) {
c6bf6a65
NC
716 UV uv = SSPOPUV;
717 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
718 TAINT_NOT;
719
c6bf6a65 720 switch (type) {
79072805 721 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
722 value = MUTABLE_SV(SSPOPPTR);
723 sv = MUTABLE_SV(SSPOPPTR);
79072805 724 sv_replace(sv,value);
3280af22 725 PL_localizing = 2;
79072805 726 SvSETMAGIC(sv);
3280af22 727 PL_localizing = 0;
79072805 728 break;
8aacddc1 729 case SAVEt_SV: /* scalar reference */
ad64d0ec 730 value = MUTABLE_SV(SSPOPPTR);
159b6efe 731 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 732 ptr = &GvSV(gv);
502c6561 733 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
734 restore_sv:
735 sv = *(SV**)ptr;
2053acbf
NC
736 *(SV**)ptr = value;
737 SvREFCNT_dec(sv);
738 PL_localizing = 2;
739 SvSETMAGIC(value);
740 PL_localizing = 0;
741 SvREFCNT_dec(value);
742 if (av) /* actually an av, hv or gv */
743 SvREFCNT_dec(av);
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;
8aacddc1 765 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 766 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 767 ptr = SSPOPPTR;
f4dd75d9
GS
768 sv = *(SV**)ptr;
769 *(SV**)ptr = value;
770 SvREFCNT_dec(sv);
b9d12d37
GS
771 SvREFCNT_dec(value);
772 break;
8aacddc1 773 case SAVEt_AV: /* array reference */
502c6561 774 av = MUTABLE_AV(SSPOPPTR);
159b6efe 775 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 776 SvREFCNT_dec(GvAV(gv));
8aacddc1 777 GvAV(gv) = av;
fb73857a 778 if (SvMAGICAL(av)) {
3280af22 779 PL_localizing = 2;
ad64d0ec 780 SvSETMAGIC(MUTABLE_SV(av));
3280af22 781 PL_localizing = 0;
fb73857a 782 }
8aacddc1
NIS
783 break;
784 case SAVEt_HV: /* hash reference */
85fbaab2 785 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 786 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 787 SvREFCNT_dec(GvHV(gv));
8aacddc1 788 GvHV(gv) = hv;
fb73857a 789 if (SvMAGICAL(hv)) {
3280af22 790 PL_localizing = 2;
ad64d0ec 791 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 792 PL_localizing = 0;
fb73857a 793 }
8aacddc1 794 break;
79072805
LW
795 case SAVEt_INT: /* int reference */
796 ptr = SSPOPPTR;
797 *(int*)ptr = (int)SSPOPINT;
798 break;
9febdf04
RH
799 case SAVEt_BOOL: /* bool reference */
800 ptr = SSPOPPTR;
65504245 801 *(bool*)ptr = cBOOL(uv >> 8);
9febdf04 802 break;
79072805
LW
803 case SAVEt_I32: /* I32 reference */
804 ptr = SSPOPPTR;
3235b7a3
NC
805#ifdef PERL_DEBUG_READONLY_OPS
806 {
807 const I32 val = SSPOPINT;
808 if (*(I32*)ptr != val)
809 *(I32*)ptr = val;
810 }
811#else
79072805 812 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 813#endif
79072805
LW
814 break;
815 case SAVEt_SPTR: /* SV* reference */
816 ptr = SSPOPPTR;
ad64d0ec 817 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 818 break;
146174a9 819 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
820 case SAVEt_PPTR: /* char* reference */
821 ptr = SSPOPPTR;
822 *(char**)ptr = (char*)SSPOPPTR;
823 break;
79072805
LW
824 case SAVEt_HPTR: /* HV* reference */
825 ptr = SSPOPPTR;
85fbaab2 826 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
827 break;
828 case SAVEt_APTR: /* AV* reference */
829 ptr = SSPOPPTR;
502c6561 830 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 831 break;
fb73857a 832 case SAVEt_GP: /* scalar reference */
159b6efe 833 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 834 gp_free(gv);
b9e00b79
LRG
835 GvGP(gv) = (GP*)SSPOPPTR;
836 if (SSPOPINT)
837 SvFAKE_on(gv);
dd69841b
BB
838 /* putting a method back into circulation ("local")*/
839 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
840 mro_method_changed_in(hv);
4633a7c4 841 SvREFCNT_dec(gv);
8aacddc1 842 break;
8990e307
LW
843 case SAVEt_FREESV:
844 ptr = SSPOPPTR;
ad64d0ec 845 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 846 break;
26d9b02f
JH
847 case SAVEt_MORTALIZESV:
848 ptr = SSPOPPTR;
ad64d0ec 849 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 850 break;
8990e307
LW
851 case SAVEt_FREEOP:
852 ptr = SSPOPPTR;
f3548bdc 853 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
854 op_free((OP*)ptr);
855 break;
856 case SAVEt_FREEPV:
857 ptr = SSPOPPTR;
1df70142 858 Safefree(ptr);
8990e307
LW
859 break;
860 case SAVEt_CLEARSV:
cdcdfc56 861 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 862 sv = *(SV**)ptr;
dd2155a4
DM
863
864 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
865 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
866 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
867 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
868 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
869 ));
870
bc44cdaf
GS
871 /* Can clear pad variable in place? */
872 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
873 /*
874 * if a my variable that was made readonly is going out of
875 * scope, we want to remove the readonlyness so that it can
876 * go out of scope quietly
8aacddc1 877 */
a26e96df 878 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
879 SvREADONLY_off(sv);
880
6fc92669 881 if (SvTHINKFIRST(sv))
840a7b70 882 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
883 if (SvMAGICAL(sv))
884 mg_free(sv);
8990e307
LW
885
886 switch (SvTYPE(sv)) {
887 case SVt_NULL:
888 break;
889 case SVt_PVAV:
502c6561 890 av_clear(MUTABLE_AV(sv));
8990e307
LW
891 break;
892 case SVt_PVHV:
85fbaab2 893 hv_clear(MUTABLE_HV(sv));
8990e307
LW
894 break;
895 case SVt_PVCV:
cea2e8a9 896 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 897 default:
0c34ef67 898 SvOK_off(sv);
8990e307
LW
899 break;
900 }
d9d18af6 901 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
902 }
903 else { /* Someone has a claim on this, so abandon it. */
35a4481c 904 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 905 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
906 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
907 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 908 default: *(SV**)ptr = newSV(0); break;
8990e307 909 }
53868620 910 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
911 /* preserve pad nature, but also mark as not live
912 * for any closure capturing */
2740392c 913 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
914 }
915 break;
916 case SAVEt_DELETE:
917 ptr = SSPOPPTR;
85fbaab2 918 hv = MUTABLE_HV(ptr);
35d4f826 919 i = SSPOPINT;
8990e307 920 ptr = SSPOPPTR;
35d4f826 921 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 922 SvREFCNT_dec(hv);
8aacddc1 923 Safefree(ptr);
8990e307 924 break;
c68ec7a9
VP
925 case SAVEt_ADELETE:
926 ptr = SSPOPPTR;
927 av = MUTABLE_AV(ptr);
928 i = SSPOPINT;
929 (void)av_delete(av, i, G_DISCARD);
930 SvREFCNT_dec(av);
931 break;
146174a9
CB
932 case SAVEt_DESTRUCTOR_X:
933 ptr = SSPOPPTR;
acfe0abc 934 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
935 break;
936 case SAVEt_REGCONTEXT:
e0fa7e2b 937 /* regexp must have croaked */
455ece5e 938 case SAVEt_ALLOC:
1be36ce0 939 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 940 break;
55497cff 941 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 942 i = SSPOPINT;
3280af22 943 PL_stack_sp = PL_stack_base + i;
55497cff 944 break;
ea8d6ae1
DB
945 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
946 i = SSPOPINT;
947 cxstack[i].blk_oldsp = SSPOPINT;
948 break;
161b7d16 949 case SAVEt_AELEM: /* array element */
ad64d0ec 950 value = MUTABLE_SV(SSPOPPTR);
161b7d16 951 i = SSPOPINT;
502c6561 952 av = MUTABLE_AV(SSPOPPTR);
658aef79 953 ptr = av_fetch(av,i,1);
5dd42e15
DM
954 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
955 SvREFCNT_dec(value);
4e4c362e
GS
956 if (ptr) {
957 sv = *(SV**)ptr;
3280af22 958 if (sv && sv != &PL_sv_undef) {
ad64d0ec 959 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 960 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
961 goto restore_sv;
962 }
963 }
964 SvREFCNT_dec(av);
965 SvREFCNT_dec(value);
966 break;
161b7d16 967 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
968 value = MUTABLE_SV(SSPOPPTR);
969 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 970 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 971 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 972 SvREFCNT_dec(sv);
4e4c362e 973 if (ptr) {
35a4481c 974 const SV * const oval = HeVAL((HE*)ptr);
3280af22 975 if (oval && oval != &PL_sv_undef) {
4e4c362e 976 ptr = &HeVAL((HE*)ptr);
ad64d0ec 977 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 978 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 979 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
980 goto restore_sv;
981 }
982 }
983 SvREFCNT_dec(hv);
4e4c362e
GS
984 SvREFCNT_dec(value);
985 break;
462e5cf6 986 case SAVEt_OP:
533c011a 987 PL_op = (OP*)SSPOPPTR;
462e5cf6 988 break;
25eaa213 989 case SAVEt_HINTS:
045ac317 990 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 991 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
992 GvHV(PL_hintgv) = NULL;
993 }
c28fe1ec
NC
994 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
995 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 996 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 997 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 998 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 999 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1000 assert(GvHV(PL_hintgv));
1001 } else if (!GvHV(PL_hintgv)) {
1002 /* Need to add a new one manually, else gv_fetchpv() can
1003 add one in this code:
1004
1005 if (SvTYPE(gv) == SVt_PVGV) {
1006 if (add) {
1007 GvMULTI_on(gv);
1008 gv_init_sv(gv, sv_type);
1009 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1010 require_errno(gv);
1011 }
1012 return gv;
1013 }
1014
1015 and it won't have the magic set. */
1016
1017 HV *const hv = newHV();
1018 hv_magic(hv, NULL, PERL_MAGIC_hints);
1019 GvHV(PL_hintgv) = hv;
dfa41748 1020 }
5b9c0671 1021 assert(GvHV(PL_hintgv));
b3ac6de7 1022 break;
cb50131a 1023 case SAVEt_COMPPAD:
f3548bdc 1024 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1025 if (PL_comppad)
cb50131a
CB
1026 PL_curpad = AvARRAY(PL_comppad);
1027 else
4608196e 1028 PL_curpad = NULL;
cb50131a 1029 break;
09edbca0 1030 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1031 {
35a4481c 1032 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1033 SV **svp;
c3564e5c 1034 ptr = SSPOPPTR;
09edbca0
NC
1035 assert (ptr);
1036 svp = AvARRAY((PAD*)ptr) + off;
1037 /* This mortalizing used to be done by POPLOOP() via itersave.
1038 But as we have all the information here, we can do it here,
1039 save even having to have itersave in the struct. */
1040 sv_2mortal(*svp);
ad64d0ec 1041 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1042 }
1043 break;
8b7059b1
DM
1044 case SAVEt_SAVESWITCHSTACK:
1045 {
1046 dSP;
502c6561
NC
1047 AV *const t = MUTABLE_AV(SSPOPPTR);
1048 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1049 SWITCHSTACK(t,f);
1050 PL_curstackinfo->si_stack = f;
1051 }
1052 break;
14f338dc
DM
1053 case SAVEt_SET_SVFLAGS:
1054 {
35a4481c
AL
1055 const U32 val = (U32)SSPOPINT;
1056 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1057 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1058 SvFLAGS(sv) &= ~mask;
1059 SvFLAGS(sv) |= val;
1060 }
1061 break;
95e06916
NC
1062
1063 /* This would be a mathom, but Perl_save_svref() calls a static
1064 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1065 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1066 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1067 ptr = SSPOPPTR;
1068 av = NULL; /* what to refcnt_dec */
1069 goto restore_sv;
95e06916
NC
1070
1071 /* These are only saved in mathoms.c */
1072 case SAVEt_NSTAB:
159b6efe 1073 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1074 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1075 break;
2053acbf
NC
1076 case SAVEt_LONG: /* long reference */
1077 ptr = SSPOPPTR;
1078 *(long*)ptr = (long)SSPOPLONG;
1079 break;
95e06916
NC
1080 case SAVEt_IV: /* IV reference */
1081 ptr = SSPOPPTR;
1082 *(IV*)ptr = (IV)SSPOPIV;
1083 break;
1084
2053acbf
NC
1085 case SAVEt_I16: /* I16 reference */
1086 ptr = SSPOPPTR;
1087 *(I16*)ptr = (I16)SSPOPINT;
1088 break;
1089 case SAVEt_I8: /* I8 reference */
1090 ptr = SSPOPPTR;
1091 *(I8*)ptr = (I8)SSPOPINT;
1092 break;
2053acbf
NC
1093 case SAVEt_DESTRUCTOR:
1094 ptr = SSPOPPTR;
1095 (*SSPOPDPTR)(ptr);
1096 break;
fc15ae8f
NC
1097 case SAVEt_COP_ARYBASE:
1098 ptr = SSPOPPTR;
1099 i = SSPOPINT;
1100 CopARYBASE_set((COP *)ptr, i);
1101 break;
68da3b2f
NC
1102 case SAVEt_COMPILE_WARNINGS:
1103 ptr = SSPOPPTR;
72dc9ed5 1104
68da3b2f
NC
1105 if (!specialWARN(PL_compiling.cop_warnings))
1106 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1107
10edeb5d 1108 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1109 break;
1ade1aa1
NC
1110 case SAVEt_RE_STATE:
1111 {
1112 const struct re_save_state *const state
1113 = (struct re_save_state *)
1114 (PL_savestack + PL_savestack_ix
1115 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1116 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1117
1ade1aa1
NC
1118 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1119 Safefree(PL_reg_start_tmp);
1ade1aa1 1120 }
1ade1aa1
NC
1121 if (PL_reg_poscache != state->re_state_reg_poscache) {
1122 Safefree(PL_reg_poscache);
1ade1aa1 1123 }
46ab3289 1124 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1125 }
1126 break;
7c197c94
DM
1127 case SAVEt_PARSER:
1128 ptr = SSPOPPTR;
1129 parser_free((yy_parser *) ptr);
1130 break;
79072805 1131 default:
cea2e8a9 1132 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1133 }
1134 }
302c0c93
NC
1135
1136 PL_tainted = was;
f410a211
NC
1137
1138 PERL_ASYNC_CHECK();
79072805 1139}
8990e307 1140
8990e307 1141void
864dbfa3 1142Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1143{
97aff369 1144 dVAR;
7918f24d
NC
1145
1146 PERL_ARGS_ASSERT_CX_DUMP;
1147
35ff7856 1148#ifdef DEBUGGING
22c35a8c 1149 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1150 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1151 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1152 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1153 PTR2UV(cx->blk_oldcop));
760ac839
LW
1154 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1155 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1156 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1157 PTR2UV(cx->blk_oldpm));
760ac839 1158 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1159 }
6b35e009 1160 switch (CxTYPE(cx)) {
8990e307
LW
1161 case CXt_NULL:
1162 case CXt_BLOCK:
1163 break;
146174a9 1164 case CXt_FORMAT:
f9c764c5
NC
1165 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1166 PTR2UV(cx->blk_format.cv));
1167 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1168 PTR2UV(cx->blk_format.gv));
1169 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1170 PTR2UV(cx->blk_format.dfoutgv));
1171 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1172 (int)CxHASARGS(cx));
f9c764c5
NC
1173 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1174 PTR2UV(cx->blk_format.retop));
146174a9 1175 break;
8990e307 1176 case CXt_SUB:
146174a9
CB
1177 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1178 PTR2UV(cx->blk_sub.cv));
760ac839 1179 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1180 (long)cx->blk_sub.olddepth);
760ac839 1181 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1182 (int)CxHASARGS(cx));
1183 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1184 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1185 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1186 break;
1187 case CXt_EVAL:
760ac839 1188 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1189 (long)CxOLD_IN_EVAL(cx));
760ac839 1190 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1191 PL_op_name[CxOLD_OP_TYPE(cx)],
1192 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1193 if (cx->blk_eval.old_namesv)
1194 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1195 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1196 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1197 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1198 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1200 break;
1201
c6fdafd0 1202 case CXt_LOOP_LAZYIV:
d01136d6 1203 case CXt_LOOP_LAZYSV:
3b719c58
NC
1204 case CXt_LOOP_FOR:
1205 case CXt_LOOP_PLAIN:
0cbdab38 1206 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1207 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1208 (long)cx->blk_loop.resetsp);
022eaa24
NC
1209 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1210 PTR2UV(cx->blk_loop.my_op));
146174a9 1211 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
022eaa24 1212 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
d01136d6 1213 /* XXX: not accurate for LAZYSV/IV */
146174a9 1214 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1215 PTR2UV(cx->blk_loop.state_u.ary.ary));
1216 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1217 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1218 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1219 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1220 break;
1221
1222 case CXt_SUBST:
760ac839 1223 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1224 (long)cx->sb_iters);
760ac839 1225 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1226 (long)cx->sb_maxiters);
35ef4773
GS
1227 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1228 (long)cx->sb_rflags);
760ac839 1229 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1230 (long)CxONCE(cx));
760ac839 1231 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1232 cx->sb_orig);
146174a9
CB
1233 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1234 PTR2UV(cx->sb_dstr));
1235 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1236 PTR2UV(cx->sb_targ));
1237 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1238 PTR2UV(cx->sb_s));
1239 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1240 PTR2UV(cx->sb_m));
1241 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1242 PTR2UV(cx->sb_strend));
1243 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1244 PTR2UV(cx->sb_rxres));
8990e307
LW
1245 break;
1246 }
65e66c80 1247#else
96a5add6 1248 PERL_UNUSED_CONTEXT;
65e66c80 1249 PERL_UNUSED_ARG(cx);
17c3b450 1250#endif /* DEBUGGING */
35ff7856 1251}
241d1a3b
NC
1252
1253/*
1254 * Local variables:
1255 * c-indentation-style: bsd
1256 * c-basic-offset: 4
1257 * indent-tabs-mode: t
1258 * End:
1259 *
37442d52
RGS
1260 * ex: set ts=8 sts=4 sw=4 noet:
1261 */