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perlhack: Note why some t/op tests avoid test.pl
[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 */
22ade07d 163 SV* const sv = PL_tmps_stack[PL_tmps_ix--];
72581b5b
VP
164#ifdef PERL_POISON
165 PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB);
22ade07d 166#endif
8aacddc1 167 if (sv && sv != &PL_sv_undef) {
463ee0b2 168 SvTEMP_off(sv);
8990e307 169 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
463ee0b2 170 }
79072805
LW
171 }
172}
173
76e3520e 174STATIC SV *
af7df257 175S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
79072805 176{
97aff369 177 dVAR;
75d34a09 178 SV * osv;
eb578fdb 179 SV *sv;
79072805 180
7918f24d
NC
181 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
182
75d34a09
VP
183 osv = *sptr;
184 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
185
f1f99dc1 186 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv)) {
a0d0e21e 187 if (SvGMAGICAL(osv)) {
a0d0e21e 188 SvFLAGS(osv) |= (SvFLAGS(osv) &
c268c2a6 189 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
a0d0e21e 190 }
75d34a09 191 if (!(flags & SAVEf_KEEPOLDELEM))
2dcac756 192 mg_localize(osv, sv, cBOOL(flags & SAVEf_SETMAGIC));
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
10507e11 284 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
79072805 285
5f05dabc 286 if (empty) {
12816592 287 GP *gp = Perl_newGP(aTHX_ gv);
146174a9 288
fae75791 289 if (GvCVu(gv))
e1a479c5 290 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
146174a9
CB
291 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
292 gp->gp_io = newIO();
293 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
294 }
72651472
NC
295#ifdef PERL_DONT_CREATE_GVSV
296 if (gv == PL_errgv) {
297 /* We could scatter this logic everywhere by changing the
298 definition of ERRSV from GvSV() to GvSVn(), but it seems more
299 efficient to do this check once here. */
300 gp->gp_sv = newSV(0);
301 }
302#endif
c43ae56f 303 GvGP_set(gv,gp);
5f05dabc
PP
304 }
305 else {
44a8e56a 306 gp_ref(GvGP(gv));
5f05dabc
PP
307 GvINTRO_on(gv);
308 }
79072805 309}
79072805 310
79072805 311AV *
864dbfa3 312Perl_save_ary(pTHX_ GV *gv)
79072805 313{
97aff369 314 dVAR;
901017d6 315 AV * const oav = GvAVn(gv);
67a38de0 316 AV *av;
fb73857a 317
7918f24d
NC
318 PERL_ARGS_ASSERT_SAVE_ARY;
319
67a38de0
NIS
320 if (!AvREAL(oav) && AvREIFY(oav))
321 av_reify(oav);
01433346 322 save_pushptrptr(SvREFCNT_inc_simple_NN(gv), oav, SAVEt_AV);
79072805 323
4608196e 324 GvAV(gv) = NULL;
fb73857a 325 av = GvAVn(gv);
0cbee0a4 326 if (SvMAGIC(oav))
9711599e 327 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
fb73857a 328 return av;
79072805
LW
329}
330
331HV *
864dbfa3 332Perl_save_hash(pTHX_ GV *gv)
79072805 333{
97aff369 334 dVAR;
fb73857a
PP
335 HV *ohv, *hv;
336
7918f24d
NC
337 PERL_ARGS_ASSERT_SAVE_HASH;
338
01433346
FC
339 save_pushptrptr(
340 SvREFCNT_inc_simple_NN(gv), (ohv = GvHVn(gv)), SAVEt_HV
341 );
79072805 342
4608196e 343 GvHV(gv) = NULL;
fb73857a 344 hv = GvHVn(gv);
0cbee0a4 345 if (SvMAGIC(ohv))
9711599e 346 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
fb73857a 347 return hv;
79072805
LW
348}
349
350void
864dbfa3 351Perl_save_item(pTHX_ register SV *item)
79072805 352{
97aff369 353 dVAR;
eb578fdb 354 SV * const sv = newSVsv(item);
79072805 355
7918f24d
NC
356 PERL_ARGS_ASSERT_SAVE_ITEM;
357
e22024d3
NC
358 save_pushptrptr(item, /* remember the pointer */
359 sv, /* remember the value */
360 SAVEt_ITEM);
79072805
LW
361}
362
363void
1409bc06 364Perl_save_bool(pTHX_ bool *boolp)
79072805 365{
97aff369 366 dVAR;
7918f24d 367
1409bc06 368 PERL_ARGS_ASSERT_SAVE_BOOL;
7918f24d 369
65504245 370 SSCHECK(2);
1409bc06 371 SSPUSHPTR(boolp);
65504245 372 SSPUSHUV(SAVEt_BOOL | (*boolp << 8));
1409bc06
NC
373}
374
7623d426
NC
375void
376Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
1409bc06
NC
377{
378 dVAR;
379 SSCHECK(3);
380 SSPUSHINT(i);
381 SSPUSHPTR(ptr);
c6bf6a65 382 SSPUSHUV(type);
79072805
LW
383}
384
385void
1409bc06 386Perl_save_int(pTHX_ int *intp)
9febdf04 387{
97aff369 388 dVAR;
994d373a 389 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d 390
1409bc06 391 PERL_ARGS_ASSERT_SAVE_INT;
7918f24d 392
994d373a
NC
393 if ((int)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
394 SSCHECK(2);
395 SSPUSHPTR(intp);
396 SSPUSHUV(SAVEt_INT_SMALL | shifted);
397 } else
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
c9441fce
NC
420 SSCHECK(2);
421 SSPUSHPTR(intp);
422 SSPUSHUV(SAVEt_I16 | ((UV)*intp << 8));
87a84751
JH
423}
424
425void
864dbfa3 426Perl_save_I32(pTHX_ I32 *intp)
79072805 427{
97aff369 428 dVAR;
89abef21 429 const UV shifted = (UV)*intp << SAVE_TIGHT_SHIFT;
7918f24d
NC
430
431 PERL_ARGS_ASSERT_SAVE_I32;
432
89abef21
NC
433 if ((I32)(shifted >> SAVE_TIGHT_SHIFT) == *intp) {
434 SSCHECK(2);
435 SSPUSHPTR(intp);
436 SSPUSHUV(SAVEt_I32_SMALL | shifted);
437 } else
438 save_pushi32ptr(*intp, intp, SAVEt_I32);
79072805
LW
439}
440
85e6fe83
LW
441/* Cannot use save_sptr() to store a char* since the SV** cast will
442 * force word-alignment and we'll miss the pointer.
443 */
444void
864dbfa3 445Perl_save_pptr(pTHX_ char **pptr)
85e6fe83 446{
97aff369 447 dVAR;
7918f24d
NC
448
449 PERL_ARGS_ASSERT_SAVE_PPTR;
450
e22024d3 451 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
85e6fe83
LW
452}
453
79072805 454void
146174a9
CB
455Perl_save_vptr(pTHX_ void *ptr)
456{
97aff369 457 dVAR;
7918f24d
NC
458
459 PERL_ARGS_ASSERT_SAVE_VPTR;
460
e22024d3 461 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
146174a9
CB
462}
463
464void
864dbfa3 465Perl_save_sptr(pTHX_ SV **sptr)
79072805 466{
97aff369 467 dVAR;
7918f24d
NC
468
469 PERL_ARGS_ASSERT_SAVE_SPTR;
470
e22024d3 471 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
79072805
LW
472}
473
c3564e5c 474void
09edbca0 475Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
c3564e5c 476{
97aff369 477 dVAR;
c3564e5c 478 SSCHECK(4);
f3548bdc 479 ASSERT_CURPAD_ACTIVE("save_padsv");
09edbca0 480 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
f3548bdc 481 SSPUSHPTR(PL_comppad);
c3564e5c 482 SSPUSHLONG((long)off);
c6bf6a65 483 SSPUSHUV(SAVEt_PADSV_AND_MORTALIZE);
c3564e5c
GS
484}
485
79072805 486void
864dbfa3 487Perl_save_hptr(pTHX_ HV **hptr)
79072805 488{
97aff369 489 dVAR;
7918f24d
NC
490
491 PERL_ARGS_ASSERT_SAVE_HPTR;
492
e22024d3 493 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
79072805
LW
494}
495
496void
864dbfa3 497Perl_save_aptr(pTHX_ AV **aptr)
79072805 498{
97aff369 499 dVAR;
7918f24d
NC
500
501 PERL_ARGS_ASSERT_SAVE_APTR;
502
e22024d3 503 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
79072805
LW
504}
505
506void
2fd8beea 507Perl_save_pushptr(pTHX_ void *const ptr, const int type)
8990e307 508{
97aff369 509 dVAR;
8990e307 510 SSCHECK(2);
2fd8beea 511 SSPUSHPTR(ptr);
c6bf6a65 512 SSPUSHUV(type);
8990e307
LW
513}
514
515void
864dbfa3 516Perl_save_clearsv(pTHX_ SV **svp)
8990e307 517{
97aff369 518 dVAR;
cdcdfc56
NC
519 const UV offset = svp - PL_curpad;
520 const UV offset_shifted = offset << SAVE_TIGHT_SHIFT;
7918f24d
NC
521
522 PERL_ARGS_ASSERT_SAVE_CLEARSV;
523
f3548bdc 524 ASSERT_CURPAD_ACTIVE("save_clearsv");
cdcdfc56
NC
525 if ((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)
526 Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)",
527 offset, svp, PL_curpad);
528
529 SSCHECK(1);
530 SSPUSHUV(offset_shifted | SAVEt_CLEARSV);
d9d18af6 531 SvPADSTALE_off(*svp); /* mark lexical as active */
8990e307
LW
532}
533
534void
864dbfa3 535Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
8990e307 536{
97aff369 537 dVAR;
7918f24d
NC
538
539 PERL_ARGS_ASSERT_SAVE_DELETE;
540
85a721ca 541 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
8990e307
LW
542}
543
544void
af097752
VP
545Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
546{
547 STRLEN len;
548 I32 klen;
549 const char *key;
550
551 PERL_ARGS_ASSERT_SAVE_HDELETE;
552
553 key = SvPV_const(keysv, len);
554 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
555 SvREFCNT_inc_simple_void_NN(hv);
556 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
557}
558
559void
c68ec7a9
VP
560Perl_save_adelete(pTHX_ AV *av, I32 key)
561{
562 dVAR;
563
564 PERL_ARGS_ASSERT_SAVE_ADELETE;
565
566 SvREFCNT_inc_void(av);
567 save_pushi32ptr(key, av, SAVEt_ADELETE);
568}
569
570void
12ab1f58
JH
571Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
572{
573 dVAR;
7918f24d
NC
574
575 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
576
12ab1f58
JH
577 SSCHECK(3);
578 SSPUSHDPTR(f);
579 SSPUSHPTR(p);
c6bf6a65 580 SSPUSHUV(SAVEt_DESTRUCTOR);
12ab1f58
JH
581}
582
583void
146174a9
CB
584Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
585{
97aff369 586 dVAR;
146174a9
CB
587 SSCHECK(3);
588 SSPUSHDXPTR(f);
589 SSPUSHPTR(p);
c6bf6a65 590 SSPUSHUV(SAVEt_DESTRUCTOR_X);
146174a9
CB
591}
592
593void
da8315f8
NC
594Perl_save_hints(pTHX)
595{
596 dVAR;
20439bc7 597 COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling));
da8315f8 598 if (PL_hints & HINT_LOCALIZE_HH) {
52c7aca6
FC
599 HV *oldhh = GvHV(PL_hintgv);
600 save_pushptri32ptr(oldhh, PL_hints, save_cophh, SAVEt_HINTS);
601 GvHV(PL_hintgv) = NULL; /* in case copying dies */
602 GvHV(PL_hintgv) = hv_copy_hints_hv(oldhh);
be84297e 603 } else {
20439bc7 604 save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS);
da8315f8 605 }
be84297e
NC
606}
607
608static void
609S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
610 const int type)
611{
612 SSCHECK(4);
613 SSPUSHPTR(ptr1);
614 SSPUSHINT(i);
615 SSPUSHPTR(ptr2);
c6bf6a65 616 SSPUSHUV(type);
da8315f8
NC
617}
618
619void
91d1c79f 620Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
4e4c362e 621{
97aff369 622 dVAR;
bfc4de9f 623 SV *sv;
7918f24d 624
91d1c79f 625 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
7918f24d 626
0cbee0a4 627 SvGETMAGIC(*sptr);
be84297e
NC
628 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
629 SAVEt_AELEM);
1cdc9186
FC
630 /* The array needs to hold a reference count on its new element, so it
631 must be AvREAL. */
5dd42e15 632 if (!AvREAL(av) && AvREIFY(av))
1cdc9186 633 av_reify(av);
91d1c79f 634 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
75d34a09
VP
635 if (flags & SAVEf_KEEPOLDELEM)
636 return;
bfc4de9f
DM
637 sv = *sptr;
638 /* If we're localizing a tied array element, this new sv
639 * won't actually be stored in the array - so it won't get
640 * reaped when the localize ends. Ensure it gets reaped by
641 * mortifying it instead. DAPM */
daeb922a 642 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
bfc4de9f 643 sv_2mortal(sv);
4e4c362e
GS
644}
645
646void
af7df257 647Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
4e4c362e 648{
97aff369 649 dVAR;
bfc4de9f 650 SV *sv;
7918f24d 651
af7df257 652 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
7918f24d 653
0cbee0a4 654 SvGETMAGIC(*sptr);
4e4c362e 655 SSCHECK(4);
b37c2d43 656 SSPUSHPTR(SvREFCNT_inc_simple(hv));
b2096149 657 SSPUSHPTR(newSVsv(key));
4e4c362e 658 SSPUSHPTR(SvREFCNT_inc(*sptr));
c6bf6a65 659 SSPUSHUV(SAVEt_HELEM);
af7df257 660 save_scalar_at(sptr, flags);
75d34a09
VP
661 if (flags & SAVEf_KEEPOLDELEM)
662 return;
bfc4de9f
DM
663 sv = *sptr;
664 /* If we're localizing a tied hash element, this new sv
665 * won't actually be stored in the hash - so it won't get
666 * reaped when the localize ends. Ensure it gets reaped by
667 * mortifying it instead. DAPM */
daeb922a 668 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
bfc4de9f 669 sv_2mortal(sv);
4e4c362e
GS
670}
671
2053acbf
NC
672SV*
673Perl_save_svref(pTHX_ SV **sptr)
674{
675 dVAR;
7918f24d
NC
676
677 PERL_ARGS_ASSERT_SAVE_SVREF;
678
2053acbf 679 SvGETMAGIC(*sptr);
e22024d3 680 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
af7df257 681 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
2053acbf
NC
682}
683
455ece5e 684I32
864dbfa3 685Perl_save_alloc(pTHX_ I32 size, I32 pad)
455ece5e 686{
97aff369 687 dVAR;
eb578fdb
KW
688 const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
689 - (char*)PL_savestack);
1be36ce0
NC
690 const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
691 const UV elems_shifted = elems << SAVE_TIGHT_SHIFT;
455ece5e 692
1be36ce0
NC
693 if ((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)
694 Perl_croak(aTHX_ "panic: save_alloc elems %"UVuf" out of range (%ld-%ld)",
695 elems, size, pad);
696
697 SSGROW(elems + 1);
455ece5e
AD
698
699 PL_savestack_ix += elems;
1be36ce0 700 SSPUSHUV(SAVEt_ALLOC | elems_shifted);
455ece5e
AD
701 return start;
702}
703
462e5cf6 704void
864dbfa3 705Perl_leave_scope(pTHX_ I32 base)
79072805 706{
97aff369 707 dVAR;
eb578fdb
KW
708 SV *sv;
709 SV *value;
710 GV *gv;
711 AV *av;
712 HV *hv;
20454177 713 void* ptr;
eb578fdb 714 char* str;
161b7d16 715 I32 i;
302c0c93 716 /* Localise the effects of the TAINT_NOT inside the loop. */
284167a5 717 bool was = TAINT_get;
79072805
LW
718
719 if (base < -1)
5637ef5b 720 Perl_croak(aTHX_ "panic: corrupt saved stack index %ld", (long) base);
1c98cc53
DM
721 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
722 (long)PL_savestack_ix, (long)base));
3280af22 723 while (PL_savestack_ix > base) {
c6bf6a65
NC
724 UV uv = SSPOPUV;
725 const U8 type = (U8)uv & SAVE_MASK;
c6ae7647
NC
726 TAINT_NOT;
727
c6bf6a65 728 switch (type) {
79072805 729 case SAVEt_ITEM: /* normal string */
ad64d0ec
NC
730 value = MUTABLE_SV(SSPOPPTR);
731 sv = MUTABLE_SV(SSPOPPTR);
79072805 732 sv_replace(sv,value);
3280af22 733 PL_localizing = 2;
79072805 734 SvSETMAGIC(sv);
3280af22 735 PL_localizing = 0;
79072805 736 break;
8aacddc1 737 case SAVEt_SV: /* scalar reference */
ad64d0ec 738 value = MUTABLE_SV(SSPOPPTR);
159b6efe 739 gv = MUTABLE_GV(SSPOPPTR);
7a4c00b4 740 ptr = &GvSV(gv);
502c6561 741 av = MUTABLE_AV(gv); /* what to refcnt_dec */
2053acbf
NC
742 restore_sv:
743 sv = *(SV**)ptr;
2053acbf
NC
744 *(SV**)ptr = value;
745 SvREFCNT_dec(sv);
746 PL_localizing = 2;
747 SvSETMAGIC(value);
748 PL_localizing = 0;
749 SvREFCNT_dec(value);
9bfbb681 750 SvREFCNT_dec(av); /* av may actually be an AV, HV or GV */
2053acbf 751 break;
8aacddc1 752 case SAVEt_GENERIC_PVREF: /* generic pv */
f4dd75d9 753 ptr = SSPOPPTR;
b03d03b0 754 str = (char*)SSPOPPTR;
f4dd75d9
GS
755 if (*(char**)ptr != str) {
756 Safefree(*(char**)ptr);
757 *(char**)ptr = str;
758 }
759 break;
05ec9bb3
NIS
760 case SAVEt_SHARED_PVREF: /* shared pv */
761 str = (char*)SSPOPPTR;
762 ptr = SSPOPPTR;
763 if (*(char**)ptr != str) {
5e54c26f 764#ifdef NETWARE
9ecbcc42 765 PerlMem_free(*(char**)ptr);
5e54c26f 766#else
05ec9bb3 767 PerlMemShared_free(*(char**)ptr);
5e54c26f 768#endif
05ec9bb3
NIS
769 *(char**)ptr = str;
770 }
771 break;
f83b46a0
DM
772 case SAVEt_GVSV: /* scalar slot in GV */
773 value = MUTABLE_SV(SSPOPPTR);
774 gv = MUTABLE_GV(SSPOPPTR);
775 ptr = &GvSV(gv);
776 goto restore_svp;
8aacddc1 777 case SAVEt_GENERIC_SVREF: /* generic sv */
ad64d0ec 778 value = MUTABLE_SV(SSPOPPTR);
b9d12d37 779 ptr = SSPOPPTR;
f83b46a0 780 restore_svp:
f4dd75d9
GS
781 sv = *(SV**)ptr;
782 *(SV**)ptr = value;
783 SvREFCNT_dec(sv);
b9d12d37
GS
784 SvREFCNT_dec(value);
785 break;
8aacddc1 786 case SAVEt_AV: /* array reference */
502c6561 787 av = MUTABLE_AV(SSPOPPTR);
159b6efe 788 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 789 SvREFCNT_dec(GvAV(gv));
8aacddc1 790 GvAV(gv) = av;
fb73857a 791 if (SvMAGICAL(av)) {
3280af22 792 PL_localizing = 2;
ad64d0ec 793 SvSETMAGIC(MUTABLE_SV(av));
3280af22 794 PL_localizing = 0;
fb73857a 795 }
01433346 796 SvREFCNT_dec(gv);
8aacddc1
NIS
797 break;
798 case SAVEt_HV: /* hash reference */
85fbaab2 799 hv = MUTABLE_HV(SSPOPPTR);
159b6efe 800 gv = MUTABLE_GV(SSPOPPTR);
ef8d46e8 801 SvREFCNT_dec(GvHV(gv));
8aacddc1 802 GvHV(gv) = hv;
fb73857a 803 if (SvMAGICAL(hv)) {
3280af22 804 PL_localizing = 2;
ad64d0ec 805 SvSETMAGIC(MUTABLE_SV(hv));
3280af22 806 PL_localizing = 0;
fb73857a 807 }
01433346 808 SvREFCNT_dec(gv);
8aacddc1 809 break;
994d373a
NC
810 case SAVEt_INT_SMALL:
811 ptr = SSPOPPTR;
812 *(int*)ptr = (int)(uv >> SAVE_TIGHT_SHIFT);
813 break;
79072805
LW
814 case SAVEt_INT: /* int reference */
815 ptr = SSPOPPTR;
816 *(int*)ptr = (int)SSPOPINT;
817 break;
9febdf04
RH
818 case SAVEt_BOOL: /* bool reference */
819 ptr = SSPOPPTR;
65504245 820 *(bool*)ptr = cBOOL(uv >> 8);
284167a5 821#if !NO_TAINT_SUPPORT
173c3f27 822 if (ptr == &(TAINT_get)) {
b6f93e7a
KW
823 /* If we don't update <was>, to reflect what was saved on the
824 * stack for PL_tainted, then we will overwrite this attempt to
825 * restore it when we exit this routine. Note that this won't
826 * work if this value was saved in a wider-than necessary type,
827 * such as I32 */
828 was = *(bool*)ptr;
829 }
284167a5 830#endif
9febdf04 831 break;
89abef21
NC
832 case SAVEt_I32_SMALL:
833 ptr = SSPOPPTR;
834 *(I32*)ptr = (I32)(uv >> SAVE_TIGHT_SHIFT);
835 break;
79072805
LW
836 case SAVEt_I32: /* I32 reference */
837 ptr = SSPOPPTR;
3235b7a3
NC
838#ifdef PERL_DEBUG_READONLY_OPS
839 {
840 const I32 val = SSPOPINT;
841 if (*(I32*)ptr != val)
842 *(I32*)ptr = val;
843 }
844#else
79072805 845 *(I32*)ptr = (I32)SSPOPINT;
3235b7a3 846#endif
79072805
LW
847 break;
848 case SAVEt_SPTR: /* SV* reference */
849 ptr = SSPOPPTR;
ad64d0ec 850 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
79072805 851 break;
146174a9 852 case SAVEt_VPTR: /* random* reference */
85e6fe83
LW
853 case SAVEt_PPTR: /* char* reference */
854 ptr = SSPOPPTR;
855 *(char**)ptr = (char*)SSPOPPTR;
856 break;
79072805
LW
857 case SAVEt_HPTR: /* HV* reference */
858 ptr = SSPOPPTR;
85fbaab2 859 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
79072805
LW
860 break;
861 case SAVEt_APTR: /* AV* reference */
862 ptr = SSPOPPTR;
502c6561 863 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
79072805 864 break;
fb73857a 865 case SAVEt_GP: /* scalar reference */
10507e11 866 ptr = SSPOPPTR;
159b6efe 867 gv = MUTABLE_GV(SSPOPPTR);
8aacddc1 868 gp_free(gv);
c43ae56f 869 GvGP_set(gv, (GP*)ptr);
dd69841b 870 /* putting a method back into circulation ("local")*/
00169e2c 871 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvENAME_get(hv))
dd69841b 872 mro_method_changed_in(hv);
4633a7c4 873 SvREFCNT_dec(gv);
8aacddc1 874 break;
8990e307
LW
875 case SAVEt_FREESV:
876 ptr = SSPOPPTR;
ad64d0ec 877 SvREFCNT_dec(MUTABLE_SV(ptr));
8990e307 878 break;
3987a177
Z
879 case SAVEt_FREECOPHH:
880 ptr = SSPOPPTR;
881 cophh_free((COPHH *)ptr);
882 break;
26d9b02f
JH
883 case SAVEt_MORTALIZESV:
884 ptr = SSPOPPTR;
ad64d0ec 885 sv_2mortal(MUTABLE_SV(ptr));
26d9b02f 886 break;
8990e307
LW
887 case SAVEt_FREEOP:
888 ptr = SSPOPPTR;
f3548bdc 889 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
8990e307
LW
890 op_free((OP*)ptr);
891 break;
892 case SAVEt_FREEPV:
893 ptr = SSPOPPTR;
1df70142 894 Safefree(ptr);
8990e307 895 break;
4e09461c
DM
896
897 {
898 SV **svp;
899 case SAVEt_CLEARPADRANGE:
900 i = (I32)((uv >> SAVE_TIGHT_SHIFT) & OPpPADRANGE_COUNTMASK);
901 svp = &PL_curpad[uv >>
902 (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)] + i - 1;
903 goto clearsv;
8990e307 904 case SAVEt_CLEARSV:
4e09461c
DM
905 svp = &PL_curpad[uv >> SAVE_TIGHT_SHIFT];
906 i = 1;
907 clearsv:
908 for (; i; i--, svp--) {
528ad060
DM
909 sv = *svp;
910
911 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
912 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
913 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
914 (long)(svp-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
915 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
916 ));
917
918 /* Can clear pad variable in place? */
919 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
920 /*
921 * if a my variable that was made readonly is going out of
922 * scope, we want to remove the readonlyness so that it can
923 * go out of scope quietly
924 */
925 if (SvPADMY(sv) && !SvFAKE(sv))
926 SvREADONLY_off(sv);
927
928 if (SvTHINKFIRST(sv))
929 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF
930 |SV_COW_DROP_PV);
931 if (SvTYPE(sv) == SVt_PVHV)
932 Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv));
933 if (SvMAGICAL(sv))
934 {
935 sv_unmagic(sv, PERL_MAGIC_backref);
936 if (SvTYPE(sv) != SVt_PVCV)
937 mg_free(sv);
938 }
939
940 switch (SvTYPE(sv)) {
941 case SVt_NULL:
942 break;
943 case SVt_PVAV:
944 av_clear(MUTABLE_AV(sv));
945 break;
946 case SVt_PVHV:
947 hv_clear(MUTABLE_HV(sv));
948 break;
949 case SVt_PVCV:
950 {
951 HEK * const hek = CvNAME_HEK((CV *)sv);
952 assert(hek);
953 share_hek_hek(hek);
954 cv_undef((CV *)sv);
955 CvNAME_HEK_set(sv, hek);
956 break;
957 }
958 default:
959 SvOK_off(sv);
960 break;
961 }
962 SvPADSTALE_on(sv); /* mark as no longer live */
963 }
964 else { /* Someone has a claim on this, so abandon it. */
965 assert( SvFLAGS(sv) & SVs_PADMY);
966 assert(!(SvFLAGS(sv) & SVs_PADTMP));
967 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
968 case SVt_PVAV: *svp = MUTABLE_SV(newAV()); break;
969 case SVt_PVHV: *svp = MUTABLE_SV(newHV()); break;
970 case SVt_PVCV:
971 {
972 /* Create a stub */
973 *svp = newSV_type(SVt_PVCV);
974
975 /* Share name */
976 assert(CvNAMED(sv));
977 CvNAME_HEK_set(*svp,
978 share_hek_hek(CvNAME_HEK((CV *)sv)));
979 break;
980 }
981 default: *svp = newSV(0); break;
982 }
983 SvREFCNT_dec(sv); /* Cast current value to the winds. */
984 /* preserve pad nature, but also mark as not live
985 * for any closure capturing */
986 SvFLAGS(*svp) |= (SVs_PADMY|SVs_PADSTALE);
987 }
4e09461c 988 }
8990e307 989 break;
4e09461c 990 }
8990e307
LW
991 case SAVEt_DELETE:
992 ptr = SSPOPPTR;
85fbaab2 993 hv = MUTABLE_HV(ptr);
35d4f826 994 i = SSPOPINT;
8990e307 995 ptr = SSPOPPTR;
35d4f826 996 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
4e4c362e 997 SvREFCNT_dec(hv);
8aacddc1 998 Safefree(ptr);
8990e307 999 break;
c68ec7a9
VP
1000 case SAVEt_ADELETE:
1001 ptr = SSPOPPTR;
1002 av = MUTABLE_AV(ptr);
1003 i = SSPOPINT;
1004 (void)av_delete(av, i, G_DISCARD);
1005 SvREFCNT_dec(av);
1006 break;
146174a9
CB
1007 case SAVEt_DESTRUCTOR_X:
1008 ptr = SSPOPPTR;
acfe0abc 1009 (*SSPOPDXPTR)(aTHX_ ptr);
a0d0e21e
LW
1010 break;
1011 case SAVEt_REGCONTEXT:
e0fa7e2b 1012 /* regexp must have croaked */
455ece5e 1013 case SAVEt_ALLOC:
1be36ce0 1014 PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT;
a0d0e21e 1015 break;
55497cff 1016 case SAVEt_STACK_POS: /* Position on Perl stack */
161b7d16 1017 i = SSPOPINT;
3280af22 1018 PL_stack_sp = PL_stack_base + i;
55497cff 1019 break;
ea8d6ae1
DB
1020 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
1021 i = SSPOPINT;
1022 cxstack[i].blk_oldsp = SSPOPINT;
1023 break;
161b7d16 1024 case SAVEt_AELEM: /* array element */
ad64d0ec 1025 value = MUTABLE_SV(SSPOPPTR);
161b7d16 1026 i = SSPOPINT;
502c6561 1027 av = MUTABLE_AV(SSPOPPTR);
658aef79 1028 ptr = av_fetch(av,i,1);
5dd42e15
DM
1029 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
1030 SvREFCNT_dec(value);
4e4c362e
GS
1031 if (ptr) {
1032 sv = *(SV**)ptr;
3280af22 1033 if (sv && sv != &PL_sv_undef) {
ad64d0ec 1034 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
b37c2d43 1035 SvREFCNT_inc_void_NN(sv);
4e4c362e
GS
1036 goto restore_sv;
1037 }
1038 }
1039 SvREFCNT_dec(av);
1040 SvREFCNT_dec(value);
1041 break;
161b7d16 1042 case SAVEt_HELEM: /* hash element */
ad64d0ec
NC
1043 value = MUTABLE_SV(SSPOPPTR);
1044 sv = MUTABLE_SV(SSPOPPTR);
85fbaab2 1045 hv = MUTABLE_HV(SSPOPPTR);
161b7d16 1046 ptr = hv_fetch_ent(hv, sv, 1, 0);
fd1b367e 1047 SvREFCNT_dec(sv);
4e4c362e 1048 if (ptr) {
35a4481c 1049 const SV * const oval = HeVAL((HE*)ptr);
3280af22 1050 if (oval && oval != &PL_sv_undef) {
4e4c362e 1051 ptr = &HeVAL((HE*)ptr);
ad64d0ec 1052 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
b37c2d43 1053 SvREFCNT_inc_void(*(SV**)ptr);
502c6561 1054 av = MUTABLE_AV(hv); /* what to refcnt_dec */
4e4c362e
GS
1055 goto restore_sv;
1056 }
1057 }
1058 SvREFCNT_dec(hv);
4e4c362e
GS
1059 SvREFCNT_dec(value);
1060 break;
462e5cf6 1061 case SAVEt_OP:
533c011a 1062 PL_op = (OP*)SSPOPPTR;
462e5cf6 1063 break;
25eaa213 1064 case SAVEt_HINTS:
3607ca02
FC
1065 if ((PL_hints & HINT_LOCALIZE_HH)) {
1066 while (GvHV(PL_hintgv)) {
2653c1e3 1067 HV *hv = GvHV(PL_hintgv);
045ac317 1068 GvHV(PL_hintgv) = NULL;
2653c1e3 1069 SvREFCNT_dec(MUTABLE_SV(hv));
3607ca02 1070 }
045ac317 1071 }
20439bc7
Z
1072 cophh_free(CopHINTHASH_get(&PL_compiling));
1073 CopHINTHASH_set(&PL_compiling, (COPHH*)SSPOPPTR);
601cee3b 1074 *(I32*)&PL_hints = (I32)SSPOPINT;
dfa41748 1075 if (PL_hints & HINT_LOCALIZE_HH) {
ad64d0ec 1076 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
85fbaab2 1077 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
2653c1e3
DM
1078 }
1079 if (!GvHV(PL_hintgv)) {
a3fb8386
FC
1080 /* Need to add a new one manually, else rv2hv can
1081 add one via GvHVn and it won't have the magic set. */
5b9c0671
NC
1082 HV *const hv = newHV();
1083 hv_magic(hv, NULL, PERL_MAGIC_hints);
1084 GvHV(PL_hintgv) = hv;
dfa41748 1085 }
5b9c0671 1086 assert(GvHV(PL_hintgv));
b3ac6de7 1087 break;
cb50131a 1088 case SAVEt_COMPPAD:
f3548bdc 1089 PL_comppad = (PAD*)SSPOPPTR;
58ed4fbe 1090 if (PL_comppad)
cb50131a
CB
1091 PL_curpad = AvARRAY(PL_comppad);
1092 else
4608196e 1093 PL_curpad = NULL;
cb50131a 1094 break;
09edbca0 1095 case SAVEt_PADSV_AND_MORTALIZE:
c3564e5c 1096 {
35a4481c 1097 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
09edbca0 1098 SV **svp;
c3564e5c 1099 ptr = SSPOPPTR;
09edbca0
NC
1100 assert (ptr);
1101 svp = AvARRAY((PAD*)ptr) + off;
1102 /* This mortalizing used to be done by POPLOOP() via itersave.
1103 But as we have all the information here, we can do it here,
1104 save even having to have itersave in the struct. */
1105 sv_2mortal(*svp);
ad64d0ec 1106 *svp = MUTABLE_SV(SSPOPPTR);
c3564e5c
GS
1107 }
1108 break;
8b7059b1
DM
1109 case SAVEt_SAVESWITCHSTACK:
1110 {
1111 dSP;
502c6561
NC
1112 AV *const t = MUTABLE_AV(SSPOPPTR);
1113 AV *const f = MUTABLE_AV(SSPOPPTR);
8b7059b1
DM
1114 SWITCHSTACK(t,f);
1115 PL_curstackinfo->si_stack = f;
1116 }
1117 break;
14f338dc
DM
1118 case SAVEt_SET_SVFLAGS:
1119 {
35a4481c
AL
1120 const U32 val = (U32)SSPOPINT;
1121 const U32 mask = (U32)SSPOPINT;
ad64d0ec 1122 sv = MUTABLE_SV(SSPOPPTR);
14f338dc
DM
1123 SvFLAGS(sv) &= ~mask;
1124 SvFLAGS(sv) |= val;
1125 }
1126 break;
95e06916
NC
1127
1128 /* This would be a mathom, but Perl_save_svref() calls a static
1129 function, S_save_scalar_at(), so has to stay in this file. */
2053acbf 1130 case SAVEt_SVREF: /* scalar reference */
ad64d0ec 1131 value = MUTABLE_SV(SSPOPPTR);
2053acbf
NC
1132 ptr = SSPOPPTR;
1133 av = NULL; /* what to refcnt_dec */
1134 goto restore_sv;
95e06916
NC
1135
1136 /* These are only saved in mathoms.c */
1137 case SAVEt_NSTAB:
159b6efe 1138 gv = MUTABLE_GV(SSPOPPTR);
ad64d0ec 1139 (void)sv_clear(MUTABLE_SV(gv));
95e06916 1140 break;
2053acbf
NC
1141 case SAVEt_LONG: /* long reference */
1142 ptr = SSPOPPTR;
1143 *(long*)ptr = (long)SSPOPLONG;
1144 break;
95e06916
NC
1145 case SAVEt_IV: /* IV reference */
1146 ptr = SSPOPPTR;
1147 *(IV*)ptr = (IV)SSPOPIV;
1148 break;
1149
2053acbf
NC
1150 case SAVEt_I16: /* I16 reference */
1151 ptr = SSPOPPTR;
c9441fce 1152 *(I16*)ptr = (I16)(uv >> 8);
2053acbf
NC
1153 break;
1154 case SAVEt_I8: /* I8 reference */
1155 ptr = SSPOPPTR;
6c61c2d4 1156 *(I8*)ptr = (I8)(uv >> 8);
2053acbf 1157 break;
2053acbf
NC
1158 case SAVEt_DESTRUCTOR:
1159 ptr = SSPOPPTR;
1160 (*SSPOPDPTR)(ptr);
1161 break;
68da3b2f
NC
1162 case SAVEt_COMPILE_WARNINGS:
1163 ptr = SSPOPPTR;
72dc9ed5 1164
68da3b2f
NC
1165 if (!specialWARN(PL_compiling.cop_warnings))
1166 PerlMemShared_free(PL_compiling.cop_warnings);
72dc9ed5 1167
10edeb5d 1168 PL_compiling.cop_warnings = (STRLEN*)ptr;
72dc9ed5 1169 break;
1ade1aa1
NC
1170 case SAVEt_RE_STATE:
1171 {
1172 const struct re_save_state *const state
1173 = (struct re_save_state *)
1174 (PL_savestack + PL_savestack_ix
1175 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1176 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1177
1ade1aa1
NC
1178 if (PL_reg_poscache != state->re_state_reg_poscache) {
1179 Safefree(PL_reg_poscache);
1ade1aa1 1180 }
46ab3289 1181 Copy(state, &PL_reg_state, 1, struct re_save_state);
1ade1aa1
NC
1182 }
1183 break;
7c197c94
DM
1184 case SAVEt_PARSER:
1185 ptr = SSPOPPTR;
1186 parser_free((yy_parser *) ptr);
1187 break;
79072805 1188 default:
5637ef5b 1189 Perl_croak(aTHX_ "panic: leave_scope inconsistency %u", type);
79072805
LW
1190 }
1191 }
302c0c93 1192
284167a5 1193 TAINT_set(was);
f410a211
NC
1194
1195 PERL_ASYNC_CHECK();
79072805 1196}
8990e307 1197
8990e307 1198void
864dbfa3 1199Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
8990e307 1200{
97aff369 1201 dVAR;
7918f24d
NC
1202
1203 PERL_ARGS_ASSERT_CX_DUMP;
1204
35ff7856 1205#ifdef DEBUGGING
22c35a8c 1206 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
6b35e009 1207 if (CxTYPE(cx) != CXt_SUBST) {
e8d9e9d0 1208 const char *gimme_text;
760ac839 1209 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
146174a9
CB
1210 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1211 PTR2UV(cx->blk_oldcop));
760ac839
LW
1212 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1213 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
146174a9
CB
1214 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1215 PTR2UV(cx->blk_oldpm));
e8d9e9d0
VP
1216 switch (cx->blk_gimme) {
1217 case G_VOID:
1218 gimme_text = "VOID";
1219 break;
1220 case G_SCALAR:
1221 gimme_text = "SCALAR";
1222 break;
1223 case G_ARRAY:
1224 gimme_text = "LIST";
1225 break;
1226 default:
1227 gimme_text = "UNKNOWN";
1228 break;
1229 }
1230 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", gimme_text);
8990e307 1231 }
6b35e009 1232 switch (CxTYPE(cx)) {
8990e307
LW
1233 case CXt_NULL:
1234 case CXt_BLOCK:
1235 break;
146174a9 1236 case CXt_FORMAT:
f9c764c5
NC
1237 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1238 PTR2UV(cx->blk_format.cv));
1239 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1240 PTR2UV(cx->blk_format.gv));
1241 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1242 PTR2UV(cx->blk_format.dfoutgv));
1243 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
bafb2adc 1244 (int)CxHASARGS(cx));
f9c764c5
NC
1245 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1246 PTR2UV(cx->blk_format.retop));
146174a9 1247 break;
8990e307 1248 case CXt_SUB:
146174a9
CB
1249 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1250 PTR2UV(cx->blk_sub.cv));
760ac839 1251 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
8990e307 1252 (long)cx->blk_sub.olddepth);
760ac839 1253 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
bafb2adc
NC
1254 (int)CxHASARGS(cx));
1255 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
f39bc417
DM
1256 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1257 PTR2UV(cx->blk_sub.retop));
8990e307
LW
1258 break;
1259 case CXt_EVAL:
760ac839 1260 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
85a64632 1261 (long)CxOLD_IN_EVAL(cx));
760ac839 1262 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
85a64632
NC
1263 PL_op_name[CxOLD_OP_TYPE(cx)],
1264 PL_op_desc[CxOLD_OP_TYPE(cx)]);
0f79a09d
GS
1265 if (cx->blk_eval.old_namesv)
1266 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
aa07b2f6 1267 SvPVX_const(cx->blk_eval.old_namesv));
146174a9
CB
1268 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1269 PTR2UV(cx->blk_eval.old_eval_root));
f39bc417
DM
1270 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1271 PTR2UV(cx->blk_eval.retop));
8990e307
LW
1272 break;
1273
c6fdafd0 1274 case CXt_LOOP_LAZYIV:
d01136d6 1275 case CXt_LOOP_LAZYSV:
3b719c58
NC
1276 case CXt_LOOP_FOR:
1277 case CXt_LOOP_PLAIN:
0cbdab38 1278 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
760ac839 1279 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
8990e307 1280 (long)cx->blk_loop.resetsp);
022eaa24
NC
1281 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1282 PTR2UV(cx->blk_loop.my_op));
d01136d6 1283 /* XXX: not accurate for LAZYSV/IV */
146174a9 1284 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
d01136d6
BS
1285 PTR2UV(cx->blk_loop.state_u.ary.ary));
1286 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1287 (long)cx->blk_loop.state_u.ary.ix);
146174a9
CB
1288 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1289 PTR2UV(CxITERVAR(cx)));
8990e307
LW
1290 break;
1291
1292 case CXt_SUBST:
760ac839 1293 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
8990e307 1294 (long)cx->sb_iters);
760ac839 1295 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
8990e307 1296 (long)cx->sb_maxiters);
35ef4773
GS
1297 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1298 (long)cx->sb_rflags);
760ac839 1299 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
c5bed6a7 1300 (long)CxONCE(cx));
760ac839 1301 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
8990e307 1302 cx->sb_orig);
146174a9
CB
1303 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1304 PTR2UV(cx->sb_dstr));
1305 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1306 PTR2UV(cx->sb_targ));
1307 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1308 PTR2UV(cx->sb_s));
1309 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1310 PTR2UV(cx->sb_m));
1311 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1312 PTR2UV(cx->sb_strend));
1313 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1314 PTR2UV(cx->sb_rxres));
8990e307
LW
1315 break;
1316 }
65e66c80 1317#else
96a5add6 1318 PERL_UNUSED_CONTEXT;
65e66c80 1319 PERL_UNUSED_ARG(cx);
17c3b450 1320#endif /* DEBUGGING */
35ff7856 1321}
241d1a3b
NC
1322
1323/*
1324 * Local variables:
1325 * c-indentation-style: bsd
1326 * c-basic-offset: 4
14d04a33 1327 * indent-tabs-mode: nil
241d1a3b
NC
1328 * End:
1329 *
14d04a33 1330 * ex: set ts=8 sts=4 sw=4 et:
37442d52 1331 */