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scope.c: Allow successful saving of PL_tainted
[perl5.git] / scope.c
CommitLineData
a0d0e21e 1/* scope.c
79072805 2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
4ac71550
TC
12 * For the fashion of Minas Tirith was such that it was built on seven
13 * levels...
14 *
15 * [p.751 of _The Lord of the Rings_, V/i: "Minas Tirith"]
79072805
LW
16 */
17
ddfa107c 18/* This file contains functions to manipulate several of Perl's stacks;
166f8a29
DM
19 * in particular it contains code to push various types of things onto
20 * the savestack, then to pop them off and perform the correct restorative
21 * action for each one. This corresponds to the cleanup Perl does at
22 * each scope exit.
23 */
24
79072805 25#include "EXTERN.h"
864dbfa3 26#define PERL_IN_SCOPE_C
79072805
LW
27#include "perl.h"
28
a0d0e21e 29SV**
864dbfa3 30Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
a0d0e21e 31{
97aff369 32 dVAR;
7918f24d
NC
33
34 PERL_ARGS_ASSERT_STACK_GROW;
35
3280af22 36 PL_stack_sp = sp;
2ce36478 37#ifndef STRESS_REALLOC
3280af22 38 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
2ce36478 39#else
6b88bc9c 40 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
2ce36478 41#endif
3280af22 42 return PL_stack_sp;
a0d0e21e
LW
43}
44
2ce36478
SM
45#ifndef STRESS_REALLOC
46#define GROW(old) ((old) * 3 / 2)
47#else
48#define GROW(old) ((old) + 1)
49#endif
50
e336de0d 51PERL_SI *
864dbfa3 52Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
e336de0d 53{
97aff369 54 dVAR;
e336de0d 55 PERL_SI *si;
a02a5408 56 Newx(si, 1, PERL_SI);
e336de0d
GS
57 si->si_stack = newAV();
58 AvREAL_off(si->si_stack);
59 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
3280af22 60 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
e336de0d
GS
61 AvFILLp(si->si_stack) = 0;
62 si->si_prev = 0;
63 si->si_next = 0;
64 si->si_cxmax = cxitems - 1;
65 si->si_cxix = -1;
e788e7d3 66 si->si_type = PERLSI_UNDEF;
a02a5408 67 Newx(si->si_cxstack, cxitems, PERL_CONTEXT);
9965345d
JH
68 /* Without any kind of initialising PUSHSUBST()
69 * in pp_subst() will read uninitialised heap. */
7e337ee0 70 PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT);
e336de0d
GS
71 return si;
72}
73
79072805 74I32
864dbfa3 75Perl_cxinc(pTHX)
79072805 76{
97aff369 77 dVAR;
a3b680e6 78 const IV old_max = cxstack_max;
2ce36478 79 cxstack_max = GROW(cxstack_max);
401a9b14 80 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT);
9965345d
JH
81 /* Without any kind of initialising deep enough recursion
82 * will end up reading uninitialised PERL_CONTEXTs. */
109bf713 83 PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
79072805
LW
84 return cxstack_ix + 1;
85}
86
79072805 87void
864dbfa3 88Perl_push_scope(pTHX)
79072805 89{
97aff369 90 dVAR;
3280af22
NIS
91 if (PL_scopestack_ix == PL_scopestack_max) {
92 PL_scopestack_max = GROW(PL_scopestack_max);
93 Renew(PL_scopestack, PL_scopestack_max, I32);
d343c3ef
GG
94#ifdef DEBUGGING
95 Renew(PL_scopestack_name, PL_scopestack_max, const char*);
520bb150 96#endif
79072805 97 }
d343c3ef
GG
98#ifdef DEBUGGING
99 PL_scopestack_name[PL_scopestack_ix] = "unknown";
100#endif
3280af22 101 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
79072805
LW
102
103}
104
105void
864dbfa3 106Perl_pop_scope(pTHX)
79072805 107{
97aff369 108 dVAR;
35a4481c 109 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
8990e307 110 LEAVE_SCOPE(oldsave);
79072805
LW
111}
112
113void
864dbfa3 114Perl_markstack_grow(pTHX)
a0d0e21e 115{
97aff369 116 dVAR;
35a4481c
AL
117 const I32 oldmax = PL_markstack_max - PL_markstack;
118 const I32 newmax = GROW(oldmax);
a0d0e21e 119
3280af22
NIS
120 Renew(PL_markstack, newmax, I32);
121 PL_markstack_ptr = PL_markstack + oldmax;
122 PL_markstack_max = PL_markstack + newmax;
a0d0e21e
LW
123}
124
125void
864dbfa3 126Perl_savestack_grow(pTHX)
79072805 127{
97aff369 128 dVAR;
8aacddc1 129 PL_savestack_max = GROW(PL_savestack_max) + 4;
3280af22 130 Renew(PL_savestack, PL_savestack_max, ANY);
79072805
LW
131}
132
4b3c1a47
AE
133void
134Perl_savestack_grow_cnt(pTHX_ I32 need)
135{
97aff369 136 dVAR;
4b3c1a47
AE
137 PL_savestack_max = PL_savestack_ix + need;
138 Renew(PL_savestack, PL_savestack_max, ANY);
139}
140
2ce36478
SM
141#undef GROW
142
79072805 143void
864dbfa3 144Perl_tmps_grow(pTHX_ I32 n)
677b06e3 145{
97aff369 146 dVAR;
677b06e3
GS
147#ifndef STRESS_REALLOC
148 if (n < 128)
149 n = (PL_tmps_max < 512) ? 128 : 512;
150#endif
151 PL_tmps_max = PL_tmps_ix + n + 1;
152 Renew(PL_tmps_stack, PL_tmps_max, SV*);
153}
154
155
156void
864dbfa3 157Perl_free_tmps(pTHX)
79072805 158{
97aff369 159 dVAR;
79072805 160 /* XXX should tmps_floor live in cxstack? */
35a4481c 161 const I32 myfloor = PL_tmps_floor;
3280af22 162 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
901017d6 163 SV* const sv = PL_tmps_stack[PL_tmps_ix];
a0714e2c 164 PL_tmps_stack[PL_tmps_ix--] = NULL;
8aacddc1 165 if (sv && sv != &PL_sv_undef) {
463ee0b2 166 SvTEMP_off(sv);
8990e307 167 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 168 }
79072805
LW
169 }
170}
171
76e3520e 172STATIC SV *
af7df257 173S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 174{
97aff369 175 dVAR;
75d34a09
VP
176 SV * osv;
177 register SV *sv;
79072805 178
7918f24d
NC
179 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
180
75d34a09
VP
181 osv = *sptr;
182 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
183
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
79072805
LW
193 return sv;
194}
195
dfcd3de5
NC
196void
197Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
e22024d3
NC
198{
199 dVAR;
200 SSCHECK(3);
201 SSPUSHPTR(ptr1);
202 SSPUSHPTR(ptr2);
c6bf6a65 203 SSPUSHUV(type);
e22024d3
NC
204}
205
7a4c00b4 206SV *
864dbfa3 207Perl_save_scalar(pTHX_ GV *gv)
7a4c00b4 208{
97aff369 209 dVAR;
fb4fc1fa 210 SV ** const sptr = &GvSVn(gv);
7918f24d
NC
211
212 PERL_ARGS_ASSERT_SAVE_SCALAR;
213
27cc343c 214 PL_localizing = 1;
0cbee0a4 215 SvGETMAGIC(*sptr);
27cc343c 216 PL_localizing = 0;
e22024d3 217 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
af7df257 218 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
7a4c00b4
PP
219}
220
f4dd75d9 221/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
b9d12d37
GS
222 * restore a global SV to its prior contents, freeing new value. */
223void
864dbfa3 224Perl_save_generic_svref(pTHX_ SV **sptr)
b9d12d37 225{
97aff369 226 dVAR;
7918f24d
NC
227
228 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
229
e22024d3 230 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
b9d12d37
GS
231}
232
f4dd75d9
GS
233/* Like save_pptr(), but also Safefree()s the new value if it is different
234 * from the old one. Can be used to restore a global char* to its prior
235 * contents, freeing new value. */
236void
237Perl_save_generic_pvref(pTHX_ char **str)
238{
97aff369 239 dVAR;
7918f24d
NC
240
241 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
242
e22024d3 243 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
f4dd75d9
GS
244}
245
05ec9bb3
NIS
246/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
247 * Can be used to restore a shared global char* to its prior
248 * contents, freeing new value. */
249void
250Perl_save_shared_pvref(pTHX_ char **str)
251{
97aff369 252 dVAR;
7918f24d
NC
253
254 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
255
e22024d3 256 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
05ec9bb3
NIS
257}
258
14f338dc
DM
259/* set the SvFLAGS specified by mask to the values in val */
260
261void
262Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
263{
97aff369 264 dVAR;
7918f24d
NC
265
266 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
267
14f338dc
DM
268 SSCHECK(4);
269 SSPUSHPTR(sv);
270 SSPUSHINT(mask);
271 SSPUSHINT(val);
c6bf6a65 272 SSPUSHUV(SAVEt_SET_SVFLAGS);
14f338dc
DM
273}
274
79072805 275void
864dbfa3 276Perl_save_gp(pTHX_ GV *gv, I32 empty)
79072805 277{
97aff369 278 dVAR;
7918f24d
NC
279
280 PERL_ARGS_ASSERT_SAVE_GP;
281
10507e11 282 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 283
5f05dabc 284 if (empty) {
12816592 285 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 286
fae75791 287 if (GvCVu(gv))
e1a479c5 288 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
289 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
290 gp->gp_io = newIO();
291 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
292 }
72651472
NC
293#ifdef PERL_DONT_CREATE_GVSV
294 if (gv == PL_errgv) {
295 /* We could scatter this logic everywhere by changing the
296 definition of ERRSV from GvSV() to GvSVn(), but it seems more
297 efficient to do this check once here. */
298 gp->gp_sv = newSV(0);
299 }
300#endif
c43ae56f 301 GvGP_set(gv,gp);
5f05dabc
PP
302 }
303 else {
44a8e56a 304 gp_ref(GvGP(gv));
5f05dabc
PP
305 GvINTRO_on(gv);
306 }
79072805 307}
79072805 308
79072805 309AV *
864dbfa3 310Perl_save_ary(pTHX_ GV *gv)
79072805 311{
97aff369 312 dVAR;
901017d6 313 AV * const oav = GvAVn(gv);
67a38de0 314 AV *av;
fb73857a 315
7918f24d
NC
316 PERL_ARGS_ASSERT_SAVE_ARY;
317
67a38de0
NIS
318 if (!AvREAL(oav) && AvREIFY(oav))
319 av_reify(oav);
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) {
20439bc7 597 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints, save_cophh, SAVEt_HINTS);
defdfed5 598 GvHV(PL_hintgv) = hv_copy_hints_hv(GvHV(PL_hintgv));
be84297e 599 } else {
20439bc7 600 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 601 }
be84297e
NC
602}
603
604static void
605S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
606 const int type)
607{
608 SSCHECK(4);
609 SSPUSHPTR(ptr1);
610 SSPUSHINT(i);
611 SSPUSHPTR(ptr2);
c6bf6a65 612 SSPUSHUV(type);
da8315f8
NC
613}
614
615void
91d1c79f 616Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 617{
97aff369 618 dVAR;
bfc4de9f 619 SV *sv;
7918f24d 620
91d1c79f 621 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 622
0cbee0a4 623 SvGETMAGIC(*sptr);
be84297e
NC
624 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
625 SAVEt_AELEM);
5dd42e15
DM
626 /* if it gets reified later, the restore will have the wrong refcnt */
627 if (!AvREAL(av) && AvREIFY(av))
b37c2d43 628 SvREFCNT_inc_void(*sptr);
91d1c79f 629 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
630 if (flags & SAVEf_KEEPOLDELEM)
631 return;
bfc4de9f
DM
632 sv = *sptr;
633 /* If we're localizing a tied array element, this new sv
634 * won't actually be stored in the array - so it won't get
635 * reaped when the localize ends. Ensure it gets reaped by
636 * mortifying it instead. DAPM */
daeb922a 637 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 638 sv_2mortal(sv);
4e4c362e
GS
639}
640
641void
af7df257 642Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 643{
97aff369 644 dVAR;
bfc4de9f 645 SV *sv;
7918f24d 646
af7df257 647 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 648
0cbee0a4 649 SvGETMAGIC(*sptr);
4e4c362e 650 SSCHECK(4);
b37c2d43 651 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 652 SSPUSHPTR(newSVsv(key));
4e4c362e 653 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 654 SSPUSHUV(SAVEt_HELEM);
af7df257 655 save_scalar_at(sptr, flags);
75d34a09
VP
656 if (flags & SAVEf_KEEPOLDELEM)
657 return;
bfc4de9f
DM
658 sv = *sptr;
659 /* If we're localizing a tied hash element, this new sv
660 * won't actually be stored in the hash - so it won't get
661 * reaped when the localize ends. Ensure it gets reaped by
662 * mortifying it instead. DAPM */
daeb922a 663 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 664 sv_2mortal(sv);
4e4c362e
GS
665}
666
2053acbf
NC
667SV*
668Perl_save_svref(pTHX_ SV **sptr)
669{
670 dVAR;
7918f24d
NC
671
672 PERL_ARGS_ASSERT_SAVE_SVREF;
673
2053acbf 674 SvGETMAGIC(*sptr);
e22024d3 675 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 676 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
677}
678
455ece5e 679I32
864dbfa3 680Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 681{
97aff369 682 dVAR;
35a4481c 683 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
8aacddc1 684 - (char*)PL_savestack);
1be36ce0
NC
685 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
686 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 687
1be36ce0
NC
688 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
689 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
690 elems, size, pad);
691
692 SSGROW(elems + 1);
455ece5e
AD
693
694 PL_savestack_ix += elems;
1be36ce0 695 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
696 return start;
697}
698
462e5cf6 699void
864dbfa3 700Perl_leave_scope(pTHX_ I32 base)
79072805 701{
97aff369 702 dVAR;
79072805
LW
703 register SV *sv;
704 register SV *value;
705 register GV *gv;
706 register AV *av;
707 register HV *hv;
20454177 708 void* ptr;
f4dd75d9 709 register char* str;
161b7d16 710 I32 i;
302c0c93 711 /* Localise the effects of the TAINT_NOT inside the loop. */
b6f93e7a 712 bool was = PL_tainted;
79072805
LW
713
714 if (base < -1)
cea2e8a9 715 Perl_croak(aTHX_ "panic: corrupt saved stack index");
1c98cc53
DM
716 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
717 (long)PL_savestack_ix, (long)base));
3280af22 718 while (PL_savestack_ix > base) {
c6bf6a65
NC
719 UV uv = SSPOPUV;
720 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
721 TAINT_NOT;
722
c6bf6a65 723 switch (type) {
79072805 724 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
725 value = MUTABLE_SV(SSPOPPTR);
726 sv = MUTABLE_SV(SSPOPPTR);
79072805 727 sv_replace(sv,value);
3280af22 728 PL_localizing = 2;
79072805 729 SvSETMAGIC(sv);
3280af22 730 PL_localizing = 0;
79072805 731 break;
8aacddc1 732 case SAVEt_SV: /* scalar reference */
ad64d0ec 733 value = MUTABLE_SV(SSPOPPTR);
159b6efe 734 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 735 ptr = &GvSV(gv);
502c6561 736 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
737 restore_sv:
738 sv = *(SV**)ptr;
2053acbf
NC
739 *(SV**)ptr = value;
740 SvREFCNT_dec(sv);
741 PL_localizing = 2;
742 SvSETMAGIC(value);
743 PL_localizing = 0;
744 SvREFCNT_dec(value);
9bfbb681 745 SvREFCNT_dec(av); /* av may actually be an AV, HV or GV */
2053acbf 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;
f83b46a0
DM
767 case SAVEt_GVSV: /* scalar slot in GV */
768 value = MUTABLE_SV(SSPOPPTR);
769 gv = MUTABLE_GV(SSPOPPTR);
770 ptr = &GvSV(gv);
771 goto restore_svp;
8aacddc1 772 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 773 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 774 ptr = SSPOPPTR;
f83b46a0 775 restore_svp:
f4dd75d9
GS
776 sv = *(SV**)ptr;
777 *(SV**)ptr = value;
778 SvREFCNT_dec(sv);
b9d12d37
GS
779 SvREFCNT_dec(value);
780 break;
8aacddc1 781 case SAVEt_AV: /* array reference */
502c6561 782 av = MUTABLE_AV(SSPOPPTR);
159b6efe 783 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 784 SvREFCNT_dec(GvAV(gv));
8aacddc1 785 GvAV(gv) = av;
fb73857a 786 if (SvMAGICAL(av)) {
3280af22 787 PL_localizing = 2;
ad64d0ec 788 SvSETMAGIC(MUTABLE_SV(av));
3280af22 789 PL_localizing = 0;
fb73857a 790 }
01433346 791 SvREFCNT_dec(gv);
8aacddc1
NIS
792 break;
793 case SAVEt_HV: /* hash reference */
85fbaab2 794 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 795 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 796 SvREFCNT_dec(GvHV(gv));
8aacddc1 797 GvHV(gv) = hv;
fb73857a 798 if (SvMAGICAL(hv)) {
3280af22 799 PL_localizing = 2;
ad64d0ec 800 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 801 PL_localizing = 0;
fb73857a 802 }
01433346 803 SvREFCNT_dec(gv);
8aacddc1 804 break;
994d373a
NC
805 case SAVEt_INT_SMALL:
806 ptr = SSPOPPTR;
807 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
808 break;
79072805
LW
809 case SAVEt_INT: /* int reference */
810 ptr = SSPOPPTR;
811 *(int*)ptr = (int)SSPOPINT;
812 break;
9febdf04
RH
813 case SAVEt_BOOL: /* bool reference */
814 ptr = SSPOPPTR;
65504245 815 *(bool*)ptr = cBOOL(uv >> 8);
b6f93e7a
KW
816
817 if (ptr == &PL_tainted) {
818 /* If we don't update <was>, to reflect what was saved on the
819 * stack for PL_tainted, then we will overwrite this attempt to
820 * restore it when we exit this routine. Note that this won't
821 * work if this value was saved in a wider-than necessary type,
822 * such as I32 */
823 was = *(bool*)ptr;
824 }
9febdf04 825 break;
89abef21
NC
826 case SAVEt_I32_SMALL:
827 ptr = SSPOPPTR;
828 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
829 break;
79072805
LW
830 case SAVEt_I32: /* I32 reference */
831 ptr = SSPOPPTR;
3235b7a3
NC
832#ifdef PERL_DEBUG_READONLY_OPS
833 {
834 const I32 val = SSPOPINT;
835 if (*(I32*)ptr != val)
836 *(I32*)ptr = val;
837 }
838#else
79072805 839 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 840#endif
79072805
LW
841 break;
842 case SAVEt_SPTR: /* SV* reference */
843 ptr = SSPOPPTR;
ad64d0ec 844 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 845 break;
146174a9 846 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
847 case SAVEt_PPTR: /* char* reference */
848 ptr = SSPOPPTR;
849 *(char**)ptr = (char*)SSPOPPTR;
850 break;
79072805
LW
851 case SAVEt_HPTR: /* HV* reference */
852 ptr = SSPOPPTR;
85fbaab2 853 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
854 break;
855 case SAVEt_APTR: /* AV* reference */
856 ptr = SSPOPPTR;
502c6561 857 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 858 break;
fb73857a 859 case SAVEt_GP: /* scalar reference */
10507e11 860 ptr = SSPOPPTR;
159b6efe 861 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 862 gp_free(gv);
c43ae56f 863 GvGP_set(gv, (GP*)ptr);
dd69841b 864 /* putting a method back into circulation ("local")*/
00169e2c 865 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvENAME_get(hv))
dd69841b 866 mro_method_changed_in(hv);
4633a7c4 867 SvREFCNT_dec(gv);
8aacddc1 868 break;
8990e307
LW
869 case SAVEt_FREESV:
870 ptr = SSPOPPTR;
ad64d0ec 871 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 872 break;
3987a177
Z
873 case SAVEt_FREECOPHH:
874 ptr = SSPOPPTR;
875 cophh_free((COPHH *)ptr);
876 break;
26d9b02f
JH
877 case SAVEt_MORTALIZESV:
878 ptr = SSPOPPTR;
ad64d0ec 879 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 880 break;
8990e307
LW
881 case SAVEt_FREEOP:
882 ptr = SSPOPPTR;
f3548bdc 883 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
884 op_free((OP*)ptr);
885 break;
886 case SAVEt_FREEPV:
887 ptr = SSPOPPTR;
1df70142 888 Safefree(ptr);
8990e307
LW
889 break;
890 case SAVEt_CLEARSV:
cdcdfc56 891 ptr = (void*)&PL_curpad[uv >> SAVE_TIGHT_SHIFT];
8990e307 892 sv = *(SV**)ptr;
dd2155a4
DM
893
894 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
f3548bdc
DM
895 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
896 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
897 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
dd2155a4
DM
898 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
899 ));
900
bc44cdaf
GS
901 /* Can clear pad variable in place? */
902 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
8aacddc1
NIS
903 /*
904 * if a my variable that was made readonly is going out of
905 * scope, we want to remove the readonlyness so that it can
906 * go out of scope quietly
8aacddc1 907 */
a26e96df 908 if (SvPADMY(sv) && !SvFAKE(sv))
8aacddc1
NIS
909 SvREADONLY_off(sv);
910
6fc92669 911 if (SvTHINKFIRST(sv))
840a7b70 912 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
9c3f0156
FC
913 if (SvTYPE(sv) == SVt_PVHV)
914 Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv));
a0d0e21e 915 if (SvMAGICAL(sv))
9c3f0156 916 sv_unmagic(sv, PERL_MAGIC_backref),
a0d0e21e 917 mg_free(sv);
8990e307
LW
918
919 switch (SvTYPE(sv)) {
920 case SVt_NULL:
921 break;
922 case SVt_PVAV:
502c6561 923 av_clear(MUTABLE_AV(sv));
8990e307
LW
924 break;
925 case SVt_PVHV:
85fbaab2 926 hv_clear(MUTABLE_HV(sv));
8990e307
LW
927 break;
928 case SVt_PVCV:
cea2e8a9 929 Perl_croak(aTHX_ "panic: leave_scope pad code");
8990e307 930 default:
0c34ef67 931 SvOK_off(sv);
8990e307
LW
932 break;
933 }
d9d18af6 934 SvPADSTALE_on(sv); /* mark as no longer live */
8990e307
LW
935 }
936 else { /* Someone has a claim on this, so abandon it. */
9a214eec
DM
937 assert( SvFLAGS(sv) & SVs_PADMY);
938 assert(!(SvFLAGS(sv) & SVs_PADTMP));
8990e307 939 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
ad64d0ec
NC
940 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
941 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
561b68a9 942 default: *(SV**)ptr = newSV(0); break;
8990e307 943 }
53868620 944 SvREFCNT_dec(sv); /* Cast current value to the winds. */
d9d18af6
DM
945 /* preserve pad nature, but also mark as not live
946 * for any closure capturing */
9a214eec 947 SvFLAGS(*(SV**)ptr) |= (SVs_PADMY|SVs_PADSTALE);
8990e307
LW
948 }
949 break;
950 case SAVEt_DELETE:
951 ptr = SSPOPPTR;
85fbaab2 952 hv = MUTABLE_HV(ptr);
35d4f826 953 i = SSPOPINT;
8990e307 954 ptr = SSPOPPTR;
35d4f826 955 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 956 SvREFCNT_dec(hv);
8aacddc1 957 Safefree(ptr);
8990e307 958 break;
c68ec7a9
VP
959 case SAVEt_ADELETE:
960 ptr = SSPOPPTR;
961 av = MUTABLE_AV(ptr);
962 i = SSPOPINT;
963 (void)av_delete(av, i, G_DISCARD);
964 SvREFCNT_dec(av);
965 break;
146174a9
CB
966 case SAVEt_DESTRUCTOR_X:
967 ptr = SSPOPPTR;
acfe0abc 968 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
969 break;
970 case SAVEt_REGCONTEXT:
e0fa7e2b 971 /* regexp must have croaked */
455ece5e 972 case SAVEt_ALLOC:
1be36ce0 973 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 974 break;
55497cff 975 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 976 i = SSPOPINT;
3280af22 977 PL_stack_sp = PL_stack_base + i;
55497cff 978 break;
ea8d6ae1
DB
979 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
980 i = SSPOPINT;
981 cxstack[i].blk_oldsp = SSPOPINT;
982 break;
161b7d16 983 case SAVEt_AELEM: /* array element */
ad64d0ec 984 value = MUTABLE_SV(SSPOPPTR);
161b7d16 985 i = SSPOPINT;
502c6561 986 av = MUTABLE_AV(SSPOPPTR);
658aef79 987 ptr = av_fetch(av,i,1);
5dd42e15
DM
988 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
989 SvREFCNT_dec(value);
4e4c362e
GS
990 if (ptr) {
991 sv = *(SV**)ptr;
3280af22 992 if (sv && sv != &PL_sv_undef) {
ad64d0ec 993 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 994 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
995 goto restore_sv;
996 }
997 }
998 SvREFCNT_dec(av);
999 SvREFCNT_dec(value);
1000 break;
161b7d16 1001 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
1002 value = MUTABLE_SV(SSPOPPTR);
1003 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 1004 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 1005 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 1006 SvREFCNT_dec(sv);
4e4c362e 1007 if (ptr) {
35a4481c 1008 const SV * const oval = HeVAL((HE*)ptr);
3280af22 1009 if (oval && oval != &PL_sv_undef) {
4e4c362e 1010 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1011 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1012 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1013 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1014 goto restore_sv;
1015 }
1016 }
1017 SvREFCNT_dec(hv);
4e4c362e
GS
1018 SvREFCNT_dec(value);
1019 break;
462e5cf6 1020 case SAVEt_OP:
533c011a 1021 PL_op = (OP*)SSPOPPTR;
462e5cf6 1022 break;
25eaa213 1023 case SAVEt_HINTS:
045ac317 1024 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
ad64d0ec 1025 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
045ac317
RGS
1026 GvHV(PL_hintgv) = NULL;
1027 }
20439bc7
Z
1028 cophh_free(CopHINTHASH_get(&PL_compiling));
1029 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1030 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1031 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1032 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1033 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
5b9c0671
NC
1034 assert(GvHV(PL_hintgv));
1035 } else if (!GvHV(PL_hintgv)) {
1036 /* Need to add a new one manually, else gv_fetchpv() can
1037 add one in this code:
1038
1039 if (SvTYPE(gv) == SVt_PVGV) {
1040 if (add) {
1041 GvMULTI_on(gv);
1042 gv_init_sv(gv, sv_type);
1043 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1044 require_errno(gv);
1045 }
1046 return gv;
1047 }
1048
1049 and it won't have the magic set. */
1050
1051 HV *const hv = newHV();
1052 hv_magic(hv, NULL, PERL_MAGIC_hints);
1053 GvHV(PL_hintgv) = hv;
dfa41748 1054 }
5b9c0671 1055 assert(GvHV(PL_hintgv));
b3ac6de7 1056 break;
cb50131a 1057 case SAVEt_COMPPAD:
f3548bdc 1058 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1059 if (PL_comppad)
cb50131a
CB
1060 PL_curpad = AvARRAY(PL_comppad);
1061 else
4608196e 1062 PL_curpad = NULL;
cb50131a 1063 break;
09edbca0 1064 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1065 {
35a4481c 1066 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1067 SV **svp;
c3564e5c 1068 ptr = SSPOPPTR;
09edbca0
NC
1069 assert (ptr);
1070 svp = AvARRAY((PAD*)ptr) + off;
1071 /* This mortalizing used to be done by POPLOOP() via itersave.
1072 But as we have all the information here, we can do it here,
1073 save even having to have itersave in the struct. */
1074 sv_2mortal(*svp);
ad64d0ec 1075 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1076 }
1077 break;
8b7059b1
DM
1078 case SAVEt_SAVESWITCHSTACK:
1079 {
1080 dSP;
502c6561
NC
1081 AV *const t = MUTABLE_AV(SSPOPPTR);
1082 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1083 SWITCHSTACK(t,f);
1084 PL_curstackinfo->si_stack = f;
1085 }
1086 break;
14f338dc
DM
1087 case SAVEt_SET_SVFLAGS:
1088 {
35a4481c
AL
1089 const U32 val = (U32)SSPOPINT;
1090 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1091 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1092 SvFLAGS(sv) &= ~mask;
1093 SvFLAGS(sv) |= val;
1094 }
1095 break;
95e06916
NC
1096
1097 /* This would be a mathom, but Perl_save_svref() calls a static
1098 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1099 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1100 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1101 ptr = SSPOPPTR;
1102 av = NULL; /* what to refcnt_dec */
1103 goto restore_sv;
95e06916
NC
1104
1105 /* These are only saved in mathoms.c */
1106 case SAVEt_NSTAB:
159b6efe 1107 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1108 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1109 break;
2053acbf
NC
1110 case SAVEt_LONG: /* long reference */
1111 ptr = SSPOPPTR;
1112 *(long*)ptr = (long)SSPOPLONG;
1113 break;
95e06916
NC
1114 case SAVEt_IV: /* IV reference */
1115 ptr = SSPOPPTR;
1116 *(IV*)ptr = (IV)SSPOPIV;
1117 break;
1118
2053acbf
NC
1119 case SAVEt_I16: /* I16 reference */
1120 ptr = SSPOPPTR;
c9441fce 1121 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1122 break;
1123 case SAVEt_I8: /* I8 reference */
1124 ptr = SSPOPPTR;
6c61c2d4 1125 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1126 break;
2053acbf
NC
1127 case SAVEt_DESTRUCTOR:
1128 ptr = SSPOPPTR;
1129 (*SSPOPDPTR)(ptr);
1130 break;
68da3b2f
NC
1131 case SAVEt_COMPILE_WARNINGS:
1132 ptr = SSPOPPTR;
72dc9ed5 1133
68da3b2f
NC
1134 if (!specialWARN(PL_compiling.cop_warnings))
1135 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1136
10edeb5d 1137 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1138 break;
1ade1aa1
NC
1139 case SAVEt_RE_STATE:
1140 {
1141 const struct re_save_state *const state
1142 = (struct re_save_state *)
1143 (PL_savestack + PL_savestack_ix
1144 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1145 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1146
1ade1aa1
NC
1147 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1148 Safefree(PL_reg_start_tmp);
1ade1aa1 1149 }
1ade1aa1
NC
1150 if (PL_reg_poscache != state->re_state_reg_poscache) {
1151 Safefree(PL_reg_poscache);
1ade1aa1 1152 }
46ab3289 1153 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1154 }
1155 break;
7c197c94
DM
1156 case SAVEt_PARSER:
1157 ptr = SSPOPPTR;
1158 parser_free((yy_parser *) ptr);
1159 break;
79072805 1160 default:
cea2e8a9 1161 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
79072805
LW
1162 }
1163 }
302c0c93
NC
1164
1165 PL_tainted = was;
f410a211
NC
1166
1167 PERL_ASYNC_CHECK();
79072805 1168}
8990e307 1169
8990e307 1170void
864dbfa3 1171Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1172{
97aff369 1173 dVAR;
7918f24d
NC
1174
1175 PERL_ARGS_ASSERT_CX_DUMP;
1176
35ff7856 1177#ifdef DEBUGGING
22c35a8c 1178 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1179 if (CxTYPE(cx) != CXt_SUBST) {
760ac839 1180 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1181 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1182 PTR2UV(cx->blk_oldcop));
760ac839
LW
1183 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1184 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1185 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1186 PTR2UV(cx->blk_oldpm));
760ac839 1187 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
8990e307 1188 }
6b35e009 1189 switch (CxTYPE(cx)) {
8990e307
LW
1190 case CXt_NULL:
1191 case CXt_BLOCK:
1192 break;
146174a9 1193 case CXt_FORMAT:
f9c764c5
NC
1194 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1195 PTR2UV(cx->blk_format.cv));
1196 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1197 PTR2UV(cx->blk_format.gv));
1198 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1199 PTR2UV(cx->blk_format.dfoutgv));
1200 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1201 (int)CxHASARGS(cx));
f9c764c5
NC
1202 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1203 PTR2UV(cx->blk_format.retop));
146174a9 1204 break;
8990e307 1205 case CXt_SUB:
146174a9
CB
1206 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1207 PTR2UV(cx->blk_sub.cv));
760ac839 1208 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1209 (long)cx->blk_sub.olddepth);
760ac839 1210 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1211 (int)CxHASARGS(cx));
1212 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1213 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1214 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1215 break;
1216 case CXt_EVAL:
760ac839 1217 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1218 (long)CxOLD_IN_EVAL(cx));
760ac839 1219 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1220 PL_op_name[CxOLD_OP_TYPE(cx)],
1221 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1222 if (cx->blk_eval.old_namesv)
1223 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1224 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1225 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1226 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1227 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1228 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1229 break;
1230
c6fdafd0 1231 case CXt_LOOP_LAZYIV:
d01136d6 1232 case CXt_LOOP_LAZYSV:
3b719c58
NC
1233 case CXt_LOOP_FOR:
1234 case CXt_LOOP_PLAIN:
0cbdab38 1235 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1236 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1237 (long)cx->blk_loop.resetsp);
022eaa24
NC
1238 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1239 PTR2UV(cx->blk_loop.my_op));
d01136d6 1240 /* XXX: not accurate for LAZYSV/IV */
146174a9 1241 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1242 PTR2UV(cx->blk_loop.state_u.ary.ary));
1243 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1244 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1245 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1246 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1247 break;
1248
1249 case CXt_SUBST:
760ac839 1250 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1251 (long)cx->sb_iters);
760ac839 1252 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1253 (long)cx->sb_maxiters);
35ef4773
GS
1254 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1255 (long)cx->sb_rflags);
760ac839 1256 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1257 (long)CxONCE(cx));
760ac839 1258 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1259 cx->sb_orig);
146174a9
CB
1260 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1261 PTR2UV(cx->sb_dstr));
1262 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1263 PTR2UV(cx->sb_targ));
1264 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1265 PTR2UV(cx->sb_s));
1266 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1267 PTR2UV(cx->sb_m));
1268 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1269 PTR2UV(cx->sb_strend));
1270 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1271 PTR2UV(cx->sb_rxres));
8990e307
LW
1272 break;
1273 }
65e66c80 1274#else
96a5add6 1275 PERL_UNUSED_CONTEXT;
65e66c80 1276 PERL_UNUSED_ARG(cx);
17c3b450 1277#endif /* DEBUGGING */
35ff7856 1278}
241d1a3b
NC
1279
1280/*
1281 * Local variables:
1282 * c-indentation-style: bsd
1283 * c-basic-offset: 4
1284 * indent-tabs-mode: t
1285 * End:
1286 *
37442d52
RGS
1287 * ex: set ts=8 sts=4 sw=4 noet:
1288 */