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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
6c61c2d4
NC
408 SSCHECK(2);
409 SSPUSHPTR(bytep);
410 SSPUSHUV(SAVEt_I8 | ((UV)*bytep << 8));
58188858
RGS
411}
412
413void
87a84751
JH
414Perl_save_I16(pTHX_ I16 *intp)
415{
416 dVAR;
7918f24d
NC
417
418 PERL_ARGS_ASSERT_SAVE_I16;
419
1409bc06 420 save_pushi32ptr(*intp, intp, SAVEt_I16);
87a84751
JH
421}
422
423void
864dbfa3 424Perl_save_I32(pTHX_ I32 *intp)
79072805 425{
97aff369 426 dVAR;
7918f24d
NC
427
428 PERL_ARGS_ASSERT_SAVE_I32;
429
1409bc06 430 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
431}
432
85e6fe83
LW
433/* Cannot use save_sptr() to store a char* since the SV** cast will
434 * force word-alignment and we'll miss the pointer.
435 */
436void
864dbfa3 437Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 438{
97aff369 439 dVAR;
7918f24d
NC
440
441 PERL_ARGS_ASSERT_SAVE_PPTR;
442
e22024d3 443 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
444}
445
79072805 446void
146174a9
CB
447Perl_save_vptr(pTHX_ void *ptr)
448{
97aff369 449 dVAR;
7918f24d
NC
450
451 PERL_ARGS_ASSERT_SAVE_VPTR;
452
e22024d3 453 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
454}
455
456void
864dbfa3 457Perl_save_sptr(pTHX_ SV **sptr)
79072805 458{
97aff369 459 dVAR;
7918f24d
NC
460
461 PERL_ARGS_ASSERT_SAVE_SPTR;
462
e22024d3 463 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
464}
465
c3564e5c 466void
09edbca0 467Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 468{
97aff369 469 dVAR;
c3564e5c 470 SSCHECK(4);
f3548bdc 471 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 472 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 473 SSPUSHPTR(PL_comppad);
c3564e5c 474 SSPUSHLONG((long)off);
c6bf6a65 475 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
476}
477
79072805 478void
864dbfa3 479Perl_save_hptr(pTHX_ HV **hptr)
79072805 480{
97aff369 481 dVAR;
7918f24d
NC
482
483 PERL_ARGS_ASSERT_SAVE_HPTR;
484
e22024d3 485 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
486}
487
488void
864dbfa3 489Perl_save_aptr(pTHX_ AV **aptr)
79072805 490{
97aff369 491 dVAR;
7918f24d
NC
492
493 PERL_ARGS_ASSERT_SAVE_APTR;
494
e22024d3 495 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
496}
497
498void
2fd8beea 499Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 500{
97aff369 501 dVAR;
8990e307 502 SSCHECK(2);
2fd8beea 503 SSPUSHPTR(ptr);
c6bf6a65 504 SSPUSHUV(type);
8990e307
LW
505}
506
507void
864dbfa3 508Perl_save_clearsv(pTHX_ SV **svp)
8990e307 509{
97aff369 510 dVAR;
cdcdfc56
NC
511 const UV offset = svp - PL_curpad;
512 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
513
514 PERL_ARGS_ASSERT_SAVE_CLEARSV;
515
f3548bdc 516 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
517 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
518 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
519 offset, svp, PL_curpad);
520
521 SSCHECK(1);
522 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 523 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
524}
525
526void
864dbfa3 527Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 528{
97aff369 529 dVAR;
7918f24d
NC
530
531 PERL_ARGS_ASSERT_SAVE_DELETE;
532
85a721ca 533 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
534}
535
536void
af097752
VP
537Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
538{
539 STRLEN len;
540 I32 klen;
541 const char *key;
542
543 PERL_ARGS_ASSERT_SAVE_HDELETE;
544
545 key = SvPV_const(keysv, len);
546 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
547 SvREFCNT_inc_simple_void_NN(hv);
548 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
549}
550
551void
c68ec7a9
VP
552Perl_save_adelete(pTHX_ AV *av, I32 key)
553{
554 dVAR;
555
556 PERL_ARGS_ASSERT_SAVE_ADELETE;
557
558 SvREFCNT_inc_void(av);
559 save_pushi32ptr(key, av, SAVEt_ADELETE);
560}
561
562void
12ab1f58
JH
563Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
564{
565 dVAR;
7918f24d
NC
566
567 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
568
12ab1f58
JH
569 SSCHECK(3);
570 SSPUSHDPTR(f);
571 SSPUSHPTR(p);
c6bf6a65 572 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
573}
574
575void
146174a9
CB
576Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
577{
97aff369 578 dVAR;
146174a9
CB
579 SSCHECK(3);
580 SSPUSHDXPTR(f);
581 SSPUSHPTR(p);
c6bf6a65 582 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
583}
584
585void
da8315f8
NC
586Perl_save_hints(pTHX)
587{
588 dVAR;
589 if (PL_compiling.cop_hints_hash) {
590 HINTS_REFCNT_LOCK;
591 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
592 HINTS_REFCNT_UNLOCK;
593 }
da8315f8 594 if (PL_hints & HINT_LOCALIZE_HH) {
be84297e
NC
595 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
596 PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 597 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
be84297e
NC
598 } else {
599 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
da8315f8 600 }
be84297e
NC
601}
602
603static void
604S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
605 const int type)
606{
607 SSCHECK(4);
608 SSPUSHPTR(ptr1);
609 SSPUSHINT(i);
610 SSPUSHPTR(ptr2);
c6bf6a65 611 SSPUSHUV(type);
da8315f8
NC
612}
613
614void
91d1c79f 615Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 616{
97aff369 617 dVAR;
bfc4de9f 618 SV *sv;
7918f24d 619
91d1c79f 620 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 621
0cbee0a4 622 SvGETMAGIC(*sptr);
be84297e
NC
623 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
624 SAVEt_AELEM);
5dd42e15
DM
625 /* if it gets reified later, the restore will have the wrong refcnt */
626 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 627 SvREFCNT_inc_void(*sptr);
91d1c79f 628 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
629 if (flags & SAVEf_KEEPOLDELEM)
630 return;
bfc4de9f
DM
631 sv = *sptr;
632 /* If we're localizing a tied array element, this new sv
633 * won't actually be stored in the array - so it won't get
634 * reaped when the localize ends. Ensure it gets reaped by
635 * mortifying it instead. DAPM */
daeb922a 636 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 637 sv_2mortal(sv);
4e4c362e
GS
638}
639
640void
af7df257 641Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 642{
97aff369 643 dVAR;
bfc4de9f 644 SV *sv;
7918f24d 645
af7df257 646 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 647
0cbee0a4 648 SvGETMAGIC(*sptr);
4e4c362e 649 SSCHECK(4);
b37c2d43 650 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 651 SSPUSHPTR(newSVsv(key));
4e4c362e 652 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 653 SSPUSHUV(SAVEt_HELEM);
af7df257 654 save_scalar_at(sptr, flags);
75d34a09
VP
655 if (flags & SAVEf_KEEPOLDELEM)
656 return;
bfc4de9f
DM
657 sv = *sptr;
658 /* If we're localizing a tied hash element, this new sv
659 * won't actually be stored in the hash - so it won't get
660 * reaped when the localize ends. Ensure it gets reaped by
661 * mortifying it instead. DAPM */
daeb922a 662 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 663 sv_2mortal(sv);
4e4c362e
GS
664}
665
2053acbf
NC
666SV*
667Perl_save_svref(pTHX_ SV **sptr)
668{
669 dVAR;
7918f24d
NC
670
671 PERL_ARGS_ASSERT_SAVE_SVREF;
672
2053acbf 673 SvGETMAGIC(*sptr);
e22024d3 674 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 675 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
676}
677
455ece5e 678I32
864dbfa3 679Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 680{
97aff369 681 dVAR;
35a4481c 682 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 683 - (char*)PL_savestack);
1be36ce0
NC
684 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
685 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 686
1be36ce0
NC
687 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
688 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
689 elems, size, pad);
690
691 SSGROW(elems + 1);
455ece5e
AD
692
693 PL_savestack_ix += elems;
1be36ce0 694 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
695 return start;
696}
697
462e5cf6 698void
864dbfa3 699Perl_leave_scope(pTHX_ I32 base)
79072805 700{
97aff369 701 dVAR;
79072805
LW
702 register SV *sv;
703 register SV *value;
704 register GV *gv;
705 register AV *av;
706 register HV *hv;
20454177 707 void* ptr;
f4dd75d9 708 register char* str;
161b7d16 709 I32 i;
302c0c93
NC
710 /* Localise the effects of the TAINT_NOT inside the loop. */
711 const bool was = PL_tainted;
79072805
LW
712
713 if (base < -1)
cea2e8a9 714 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
715 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
716 (long)PL_savestack_ix, (long)base));
3280af22 717 while (PL_savestack_ix > base) {
c6bf6a65
NC
718 UV uv = SSPOPUV;
719 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
720 TAINT_NOT;
721
c6bf6a65 722 switch (type) {
79072805 723 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
724 value = MUTABLE_SV(SSPOPPTR);
725 sv = MUTABLE_SV(SSPOPPTR);
79072805 726 sv_replace(sv,value);
3280af22 727 PL_localizing = 2;
79072805 728 SvSETMAGIC(sv);
3280af22 729 PL_localizing = 0;
79072805 730 break;
8aacddc1 731 case SAVEt_SV: /* scalar reference */
ad64d0ec 732 value = MUTABLE_SV(SSPOPPTR);
159b6efe 733 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 734 ptr = &GvSV(gv);
502c6561 735 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
736 restore_sv:
737 sv = *(SV**)ptr;
2053acbf
NC
738 *(SV**)ptr = value;
739 SvREFCNT_dec(sv);
740 PL_localizing = 2;
741 SvSETMAGIC(value);
742 PL_localizing = 0;
743 SvREFCNT_dec(value);
744 if (av) /* actually an av, hv or gv */
745 SvREFCNT_dec(av);
746 break;
8aacddc1 747 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 748 ptr = SSPOPPTR;
b03d03b0 749 str = (char*)SSPOPPTR;
f4dd75d9
GS
750 if (*(char**)ptr != str) {
751 Safefree(*(char**)ptr);
752 *(char**)ptr = str;
753 }
754 break;
05ec9bb3
NIS
755 case SAVEt_SHARED_PVREF: /* shared pv */
756 str = (char*)SSPOPPTR;
757 ptr = SSPOPPTR;
758 if (*(char**)ptr != str) {
5e54c26f 759#ifdef NETWARE
9ecbcc42 760 PerlMem_free(*(char**)ptr);
5e54c26f 761#else
05ec9bb3 762 PerlMemShared_free(*(char**)ptr);
5e54c26f 763#endif
05ec9bb3
NIS
764 *(char**)ptr = str;
765 }
766 break;
8aacddc1 767 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 768 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 769 ptr = SSPOPPTR;
f4dd75d9
GS
770 sv = *(SV**)ptr;
771 *(SV**)ptr = value;
772 SvREFCNT_dec(sv);
b9d12d37
GS
773 SvREFCNT_dec(value);
774 break;
8aacddc1 775 case SAVEt_AV: /* array reference */
502c6561 776 av = MUTABLE_AV(SSPOPPTR);
159b6efe 777 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 778 SvREFCNT_dec(GvAV(gv));
8aacddc1 779 GvAV(gv) = av;
fb73857a 780 if (SvMAGICAL(av)) {
3280af22 781 PL_localizing = 2;
ad64d0ec 782 SvSETMAGIC(MUTABLE_SV(av));
3280af22 783 PL_localizing = 0;
fb73857a 784 }
8aacddc1
NIS
785 break;
786 case SAVEt_HV: /* hash reference */
85fbaab2 787 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 788 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 789 SvREFCNT_dec(GvHV(gv));
8aacddc1 790 GvHV(gv) = hv;
fb73857a 791 if (SvMAGICAL(hv)) {
3280af22 792 PL_localizing = 2;
ad64d0ec 793 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 794 PL_localizing = 0;
fb73857a 795 }
8aacddc1 796 break;
79072805
LW
797 case SAVEt_INT: /* int reference */
798 ptr = SSPOPPTR;
799 *(int*)ptr = (int)SSPOPINT;
800 break;
9febdf04
RH
801 case SAVEt_BOOL: /* bool reference */
802 ptr = SSPOPPTR;
65504245 803 *(bool*)ptr = cBOOL(uv >> 8);
9febdf04 804 break;
79072805
LW
805 case SAVEt_I32: /* I32 reference */
806 ptr = SSPOPPTR;
3235b7a3
NC
807#ifdef PERL_DEBUG_READONLY_OPS
808 {
809 const I32 val = SSPOPINT;
810 if (*(I32*)ptr != val)
811 *(I32*)ptr = val;
812 }
813#else
79072805 814 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 815#endif
79072805
LW
816 break;
817 case SAVEt_SPTR: /* SV* reference */
818 ptr = SSPOPPTR;
ad64d0ec 819 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 820 break;
146174a9 821 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
822 case SAVEt_PPTR: /* char* reference */
823 ptr = SSPOPPTR;
824 *(char**)ptr = (char*)SSPOPPTR;
825 break;
79072805
LW
826 case SAVEt_HPTR: /* HV* reference */
827 ptr = SSPOPPTR;
85fbaab2 828 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
829 break;
830 case SAVEt_APTR: /* AV* reference */
831 ptr = SSPOPPTR;
502c6561 832 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 833 break;
fb73857a 834 case SAVEt_GP: /* scalar reference */
159b6efe 835 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 836 gp_free(gv);
b9e00b79
LRG
837 GvGP(gv) = (GP*)SSPOPPTR;
838 if (SSPOPINT)
839 SvFAKE_on(gv);
dd69841b
BB
840 /* putting a method back into circulation ("local")*/
841 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
842 mro_method_changed_in(hv);
4633a7c4 843 SvREFCNT_dec(gv);
8aacddc1 844 break;
8990e307
LW
845 case SAVEt_FREESV:
846 ptr = SSPOPPTR;
ad64d0ec 847 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 848 break;
26d9b02f
JH
849 case SAVEt_MORTALIZESV:
850 ptr = SSPOPPTR;
ad64d0ec 851 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 852 break;
8990e307
LW
853 case SAVEt_FREEOP:
854 ptr = SSPOPPTR;
f3548bdc 855 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
856 op_free((OP*)ptr);
857 break;
858 case SAVEt_FREEPV:
859 ptr = SSPOPPTR;
1df70142 860 Safefree(ptr);
8990e307
LW
861 break;
862 case SAVEt_CLEARSV:
cdcdfc56 863 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 864 sv = *(SV**)ptr;
dd2155a4
DM
865
866 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
867 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
868 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
869 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
870 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
871 ));
872
bc44cdaf
GS
873 /* Can clear pad variable in place? */
874 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
875 /*
876 * if a my variable that was made readonly is going out of
877 * scope, we want to remove the readonlyness so that it can
878 * go out of scope quietly
8aacddc1 879 */
a26e96df 880 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
881 SvREADONLY_off(sv);
882
6fc92669 883 if (SvTHINKFIRST(sv))
840a7b70 884 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
a0d0e21e
LW
885 if (SvMAGICAL(sv))
886 mg_free(sv);
8990e307
LW
887
888 switch (SvTYPE(sv)) {
889 case SVt_NULL:
890 break;
891 case SVt_PVAV:
502c6561 892 av_clear(MUTABLE_AV(sv));
8990e307
LW
893 break;
894 case SVt_PVHV:
85fbaab2 895 hv_clear(MUTABLE_HV(sv));
8990e307
LW
896 break;
897 case SVt_PVCV:
cea2e8a9 898 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 899 default:
0c34ef67 900 SvOK_off(sv);
8990e307
LW
901 break;
902 }
d9d18af6 903 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
904 }
905 else { /* Someone has a claim on this, so abandon it. */
35a4481c 906 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
8990e307 907 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
908 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
909 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 910 default: *(SV**)ptr = newSV(0); break;
8990e307 911 }
53868620 912 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
913 /* preserve pad nature, but also mark as not live
914 * for any closure capturing */
2740392c 915 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
8990e307
LW
916 }
917 break;
918 case SAVEt_DELETE:
919 ptr = SSPOPPTR;
85fbaab2 920 hv = MUTABLE_HV(ptr);
35d4f826 921 i = SSPOPINT;
8990e307 922 ptr = SSPOPPTR;
35d4f826 923 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 924 SvREFCNT_dec(hv);
8aacddc1 925 Safefree(ptr);
8990e307 926 break;
c68ec7a9
VP
927 case SAVEt_ADELETE:
928 ptr = SSPOPPTR;
929 av = MUTABLE_AV(ptr);
930 i = SSPOPINT;
931 (void)av_delete(av, i, G_DISCARD);
932 SvREFCNT_dec(av);
933 break;
146174a9
CB
934 case SAVEt_DESTRUCTOR_X:
935 ptr = SSPOPPTR;
acfe0abc 936 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
937 break;
938 case SAVEt_REGCONTEXT:
e0fa7e2b 939 /* regexp must have croaked */
455ece5e 940 case SAVEt_ALLOC:
1be36ce0 941 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 942 break;
55497cff 943 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 944 i = SSPOPINT;
3280af22 945 PL_stack_sp = PL_stack_base + i;
55497cff 946 break;
ea8d6ae1
DB
947 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
948 i = SSPOPINT;
949 cxstack[i].blk_oldsp = SSPOPINT;
950 break;
161b7d16 951 case SAVEt_AELEM: /* array element */
ad64d0ec 952 value = MUTABLE_SV(SSPOPPTR);
161b7d16 953 i = SSPOPINT;
502c6561 954 av = MUTABLE_AV(SSPOPPTR);
658aef79 955 ptr = av_fetch(av,i,1);
5dd42e15
DM
956 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
957 SvREFCNT_dec(value);
4e4c362e
GS
958 if (ptr) {
959 sv = *(SV**)ptr;
3280af22 960 if (sv && sv != &PL_sv_undef) {
ad64d0ec 961 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 962 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
963 goto restore_sv;
964 }
965 }
966 SvREFCNT_dec(av);
967 SvREFCNT_dec(value);
968 break;
161b7d16 969 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
970 value = MUTABLE_SV(SSPOPPTR);
971 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 972 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 973 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 974 SvREFCNT_dec(sv);
4e4c362e 975 if (ptr) {
35a4481c 976 const SV * const oval = HeVAL((HE*)ptr);
3280af22 977 if (oval && oval != &PL_sv_undef) {
4e4c362e 978 ptr = &HeVAL((HE*)ptr);
ad64d0ec 979 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 980 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 981 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
982 goto restore_sv;
983 }
984 }
985 SvREFCNT_dec(hv);
4e4c362e
GS
986 SvREFCNT_dec(value);
987 break;
462e5cf6 988 case SAVEt_OP:
533c011a 989 PL_op = (OP*)SSPOPPTR;
462e5cf6 990 break;
25eaa213 991 case SAVEt_HINTS:
045ac317 992 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 993 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
994 GvHV(PL_hintgv) = NULL;
995 }
c28fe1ec
NC
996 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
997 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
601cee3b 998 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 999 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1000 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1001 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1002 assert(GvHV(PL_hintgv));
1003 } else if (!GvHV(PL_hintgv)) {
1004 /* Need to add a new one manually, else gv_fetchpv() can
1005 add one in this code:
1006
1007 if (SvTYPE(gv) == SVt_PVGV) {
1008 if (add) {
1009 GvMULTI_on(gv);
1010 gv_init_sv(gv, sv_type);
1011 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1012 require_errno(gv);
1013 }
1014 return gv;
1015 }
1016
1017 and it won't have the magic set. */
1018
1019 HV *const hv = newHV();
1020 hv_magic(hv, NULL, PERL_MAGIC_hints);
1021 GvHV(PL_hintgv) = hv;
dfa41748 1022 }
5b9c0671 1023 assert(GvHV(PL_hintgv));
b3ac6de7 1024 break;
cb50131a 1025 case SAVEt_COMPPAD:
f3548bdc 1026 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1027 if (PL_comppad)
cb50131a
CB
1028 PL_curpad = AvARRAY(PL_comppad);
1029 else
4608196e 1030 PL_curpad = NULL;
cb50131a 1031 break;
09edbca0 1032 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1033 {
35a4481c 1034 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1035 SV **svp;
c3564e5c 1036 ptr = SSPOPPTR;
09edbca0
NC
1037 assert (ptr);
1038 svp = AvARRAY((PAD*)ptr) + off;
1039 /* This mortalizing used to be done by POPLOOP() via itersave.
1040 But as we have all the information here, we can do it here,
1041 save even having to have itersave in the struct. */
1042 sv_2mortal(*svp);
ad64d0ec 1043 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1044 }
1045 break;
8b7059b1
DM
1046 case SAVEt_SAVESWITCHSTACK:
1047 {
1048 dSP;
502c6561
NC
1049 AV *const t = MUTABLE_AV(SSPOPPTR);
1050 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1051 SWITCHSTACK(t,f);
1052 PL_curstackinfo->si_stack = f;
1053 }
1054 break;
14f338dc
DM
1055 case SAVEt_SET_SVFLAGS:
1056 {
35a4481c
AL
1057 const U32 val = (U32)SSPOPINT;
1058 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1059 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1060 SvFLAGS(sv) &= ~mask;
1061 SvFLAGS(sv) |= val;
1062 }
1063 break;
95e06916
NC
1064
1065 /* This would be a mathom, but Perl_save_svref() calls a static
1066 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1067 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1068 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1069 ptr = SSPOPPTR;
1070 av = NULL; /* what to refcnt_dec */
1071 goto restore_sv;
95e06916
NC
1072
1073 /* These are only saved in mathoms.c */
1074 case SAVEt_NSTAB:
159b6efe 1075 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1076 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1077 break;
2053acbf
NC
1078 case SAVEt_LONG: /* long reference */
1079 ptr = SSPOPPTR;
1080 *(long*)ptr = (long)SSPOPLONG;
1081 break;
95e06916
NC
1082 case SAVEt_IV: /* IV reference */
1083 ptr = SSPOPPTR;
1084 *(IV*)ptr = (IV)SSPOPIV;
1085 break;
1086
2053acbf
NC
1087 case SAVEt_I16: /* I16 reference */
1088 ptr = SSPOPPTR;
1089 *(I16*)ptr = (I16)SSPOPINT;
1090 break;
1091 case SAVEt_I8: /* I8 reference */
1092 ptr = SSPOPPTR;
6c61c2d4 1093 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1094 break;
2053acbf
NC
1095 case SAVEt_DESTRUCTOR:
1096 ptr = SSPOPPTR;
1097 (*SSPOPDPTR)(ptr);
1098 break;
fc15ae8f
NC
1099 case SAVEt_COP_ARYBASE:
1100 ptr = SSPOPPTR;
1101 i = SSPOPINT;
1102 CopARYBASE_set((COP *)ptr, i);
1103 break;
68da3b2f
NC
1104 case SAVEt_COMPILE_WARNINGS:
1105 ptr = SSPOPPTR;
72dc9ed5 1106
68da3b2f
NC
1107 if (!specialWARN(PL_compiling.cop_warnings))
1108 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1109
10edeb5d 1110 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1111 break;
1ade1aa1
NC
1112 case SAVEt_RE_STATE:
1113 {
1114 const struct re_save_state *const state
1115 = (struct re_save_state *)
1116 (PL_savestack + PL_savestack_ix
1117 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1118 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1119
1ade1aa1
NC
1120 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1121 Safefree(PL_reg_start_tmp);
1ade1aa1 1122 }
1ade1aa1
NC
1123 if (PL_reg_poscache != state->re_state_reg_poscache) {
1124 Safefree(PL_reg_poscache);
1ade1aa1 1125 }
46ab3289 1126 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1127 }
1128 break;
7c197c94
DM
1129 case SAVEt_PARSER:
1130 ptr = SSPOPPTR;
1131 parser_free((yy_parser *) ptr);
1132 break;
79072805 1133 default:
cea2e8a9 1134 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1135 }
1136 }
302c0c93
NC
1137
1138 PL_tainted = was;
f410a211
NC
1139
1140 PERL_ASYNC_CHECK();
79072805 1141}
8990e307 1142
8990e307 1143void
864dbfa3 1144Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1145{
97aff369 1146 dVAR;
7918f24d
NC
1147
1148 PERL_ARGS_ASSERT_CX_DUMP;
1149
35ff7856 1150#ifdef DEBUGGING
22c35a8c 1151 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1152 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1153 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1154 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1155 PTR2UV(cx->blk_oldcop));
760ac839
LW
1156 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1157 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1158 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1159 PTR2UV(cx->blk_oldpm));
760ac839 1160 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1161 }
6b35e009 1162 switch (CxTYPE(cx)) {
8990e307
LW
1163 case CXt_NULL:
1164 case CXt_BLOCK:
1165 break;
146174a9 1166 case CXt_FORMAT:
f9c764c5
NC
1167 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1168 PTR2UV(cx->blk_format.cv));
1169 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1170 PTR2UV(cx->blk_format.gv));
1171 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1172 PTR2UV(cx->blk_format.dfoutgv));
1173 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1174 (int)CxHASARGS(cx));
f9c764c5
NC
1175 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1176 PTR2UV(cx->blk_format.retop));
146174a9 1177 break;
8990e307 1178 case CXt_SUB:
146174a9
CB
1179 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1180 PTR2UV(cx->blk_sub.cv));
760ac839 1181 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1182 (long)cx->blk_sub.olddepth);
760ac839 1183 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1184 (int)CxHASARGS(cx));
1185 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1186 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1187 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1188 break;
1189 case CXt_EVAL:
760ac839 1190 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1191 (long)CxOLD_IN_EVAL(cx));
760ac839 1192 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1193 PL_op_name[CxOLD_OP_TYPE(cx)],
1194 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1195 if (cx->blk_eval.old_namesv)
1196 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1197 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1198 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1200 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1201 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1202 break;
1203
c6fdafd0 1204 case CXt_LOOP_LAZYIV:
d01136d6 1205 case CXt_LOOP_LAZYSV:
3b719c58
NC
1206 case CXt_LOOP_FOR:
1207 case CXt_LOOP_PLAIN:
0cbdab38 1208 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1209 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1210 (long)cx->blk_loop.resetsp);
022eaa24
NC
1211 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1212 PTR2UV(cx->blk_loop.my_op));
146174a9 1213 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
022eaa24 1214 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
d01136d6 1215 /* XXX: not accurate for LAZYSV/IV */
146174a9 1216 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1217 PTR2UV(cx->blk_loop.state_u.ary.ary));
1218 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1219 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1220 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1221 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1222 break;
1223
1224 case CXt_SUBST:
760ac839 1225 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1226 (long)cx->sb_iters);
760ac839 1227 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1228 (long)cx->sb_maxiters);
35ef4773
GS
1229 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1230 (long)cx->sb_rflags);
760ac839 1231 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1232 (long)CxONCE(cx));
760ac839 1233 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1234 cx->sb_orig);
146174a9
CB
1235 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1236 PTR2UV(cx->sb_dstr));
1237 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1238 PTR2UV(cx->sb_targ));
1239 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1240 PTR2UV(cx->sb_s));
1241 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1242 PTR2UV(cx->sb_m));
1243 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1244 PTR2UV(cx->sb_strend));
1245 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1246 PTR2UV(cx->sb_rxres));
8990e307
LW
1247 break;
1248 }
65e66c80 1249#else
96a5add6 1250 PERL_UNUSED_CONTEXT;
65e66c80 1251 PERL_UNUSED_ARG(cx);
17c3b450 1252#endif /* DEBUGGING */
35ff7856 1253}
241d1a3b
NC
1254
1255/*
1256 * Local variables:
1257 * c-indentation-style: bsd
1258 * c-basic-offset: 4
1259 * indent-tabs-mode: t
1260 * End:
1261 *
37442d52
RGS
1262 * ex: set ts=8 sts=4 sw=4 noet:
1263 */