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Fix bad assertions in pp_ctl.c:pp_caller
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
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
a0d0e21e
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 *
9 */
10
11/*
4ac71550
TC
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 *
19 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
a0d0e21e
LW
20 */
21
166f8a29
DM
22/* This file contains control-oriented pp ("push/pop") functions that
23 * execute the opcodes that make up a perl program. A typical pp function
24 * expects to find its arguments on the stack, and usually pushes its
25 * results onto the stack, hence the 'pp' terminology. Each OP structure
26 * contains a pointer to the relevant pp_foo() function.
27 *
28 * Control-oriented means things like pp_enteriter() and pp_next(), which
29 * alter the flow of control of the program.
30 */
31
32
a0d0e21e 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_PP_CTL_C
a0d0e21e
LW
35#include "perl.h"
36
54310121 37#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 38
94fcd414
NC
39#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
40
a0d0e21e
LW
41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e 45 I32 cxix;
93f0bc49 46 const PERL_CONTEXT *cx;
a0d0e21e
LW
47 EXTEND(SP, 1);
48
93f0bc49
FC
49 if (PL_op->op_private & OPpOFFBYONE) {
50 if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
51 }
52 else {
53 cxix = dopoptosub(cxstack_ix);
54 if (cxix < 0)
a0d0e21e 55 RETPUSHUNDEF;
93f0bc49
FC
56 cx = &cxstack[cxix];
57 }
a0d0e21e 58
93f0bc49 59 switch (cx->blk_gimme) {
54310121 60 case G_ARRAY:
a0d0e21e 61 RETPUSHYES;
54310121 62 case G_SCALAR:
a0d0e21e 63 RETPUSHNO;
54310121
PP
64 default:
65 RETPUSHUNDEF;
66 }
a0d0e21e
LW
67}
68
2cd61cdb
IZ
69PP(pp_regcreset)
70{
97aff369 71 dVAR;
2cd61cdb
IZ
72 /* XXXX Should store the old value to allow for tie/overload - and
73 restore in regcomp, where marked with XXXX. */
3280af22 74 PL_reginterp_cnt = 0;
0b4182de 75 TAINT_NOT;
2cd61cdb
IZ
76 return NORMAL;
77}
78
b3eb6a9b
GS
79PP(pp_regcomp)
80{
97aff369 81 dVAR;
39644a26 82 dSP;
a0d0e21e 83 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 84 SV *tmpstr;
84679df5 85 REGEXP *re = NULL;
bfed75c6 86
4b5a0d1c 87 /* prevent recompiling under /o and ithreads. */
3db8f154 88#if defined(USE_ITHREADS)
131b3ad0
DM
89 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
90 if (PL_op->op_flags & OPf_STACKED) {
91 dMARK;
92 SP = MARK;
93 }
94 else
95 (void)POPs;
96 RETURN;
97 }
513629ba 98#endif
d4b87e75
BM
99
100#define tryAMAGICregexp(rx) \
101 STMT_START { \
6f1401dc 102 SvGETMAGIC(rx); \
d4b87e75 103 if (SvROK(rx) && SvAMAGIC(rx)) { \
31d632c3 104 SV *sv = AMG_CALLunary(rx, regexp_amg); \
d4b87e75
BM
105 if (sv) { \
106 if (SvROK(sv)) \
107 sv = SvRV(sv); \
108 if (SvTYPE(sv) != SVt_REGEXP) \
109 Perl_croak(aTHX_ "Overloaded qr did not return a REGEXP"); \
110 rx = sv; \
111 } \
112 } \
113 } STMT_END
114
115
131b3ad0 116 if (PL_op->op_flags & OPf_STACKED) {
486ec47a 117 /* multiple args; concatenate them */
131b3ad0
DM
118 dMARK; dORIGMARK;
119 tmpstr = PAD_SV(ARGTARG);
76f68e9b 120 sv_setpvs(tmpstr, "");
131b3ad0 121 while (++MARK <= SP) {
d4b87e75 122 SV *msv = *MARK;
79a8d529 123 SV *sv;
d4b87e75 124
79a8d529 125 tryAMAGICregexp(msv);
d4b87e75 126
79a8d529
DM
127 if ((SvAMAGIC(tmpstr) || SvAMAGIC(msv)) &&
128 (sv = amagic_call(tmpstr, msv, concat_amg, AMGf_assign)))
129 {
130 sv_setsv(tmpstr, sv);
131 continue;
131b3ad0 132 }
37c07a4b
FC
133
134 if (SvROK(msv) && SvTYPE(SvRV(msv)) == SVt_REGEXP) {
135 msv = SvRV(msv);
136 PL_reginterp_cnt +=
137 RX_SEEN_EVALS((REGEXP *)MUTABLE_PTR(msv));
138 }
139
a9984b10 140 sv_catsv_nomg(tmpstr, msv);
131b3ad0
DM
141 }
142 SvSETMAGIC(tmpstr);
143 SP = ORIGMARK;
144 }
d4b87e75 145 else {
131b3ad0 146 tmpstr = POPs;
d4b87e75
BM
147 tryAMAGICregexp(tmpstr);
148 }
149
150#undef tryAMAGICregexp
513629ba 151
b3eb6a9b 152 if (SvROK(tmpstr)) {
d8f6592e 153 SV * const sv = SvRV(tmpstr);
5c35adbb 154 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 155 re = (REGEXP*) sv;
c277df42 156 }
d4b87e75
BM
157 else if (SvTYPE(tmpstr) == SVt_REGEXP)
158 re = (REGEXP*) tmpstr;
159
5c35adbb 160 if (re) {
69dc4b30
FC
161 /* The match's LHS's get-magic might need to access this op's reg-
162 exp (as is sometimes the case with $'; see bug 70764). So we
163 must call get-magic now before we replace the regexp. Hopeful-
164 ly this hack can be replaced with the approach described at
165 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03
166 /msg122415.html some day. */
455d9033
FC
167 if(pm->op_type == OP_MATCH) {
168 SV *lhs;
169 const bool was_tainted = PL_tainted;
170 if (pm->op_flags & OPf_STACKED)
69dc4b30 171 lhs = TOPs;
455d9033
FC
172 else if (pm->op_private & OPpTARGET_MY)
173 lhs = PAD_SV(pm->op_targ);
174 else lhs = DEFSV;
175 SvGETMAGIC(lhs);
176 /* Restore the previous value of PL_tainted (which may have been
177 modified by get-magic), to avoid incorrectly setting the
178 RXf_TAINTED flag further down. */
179 PL_tainted = was_tainted;
180 }
69dc4b30 181
f0826785 182 re = reg_temp_copy(NULL, re);
aaa362c4 183 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 184 PM_SETRE(pm, re);
c277df42
IZ
185 }
186 else {
f3ec07c7
DM
187 STRLEN len = 0;
188 const char *t = SvOK(tmpstr) ? SvPV_nomg_const(tmpstr, len) : "";
189
c737faaf 190 re = PM_GETRE(pm);
14a49a24 191 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 192
20408e3c 193 /* Check against the last compiled regexp. */
a11c8683 194 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 195 memNE(RX_PRECOMP(re), t, len))
85aff577 196 {
07bc277f 197 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
73134a2e 198 U32 pm_flags = pm->op_pmflags & RXf_PMf_COMPILETIME;
d8f6592e
AL
199 if (re) {
200 ReREFCNT_dec(re);
14a49a24
NC
201#ifdef USE_ITHREADS
202 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
203#else
4608196e 204 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 205#endif
1e2e3d02 206 } else if (PL_curcop->cop_hints_hash) {
20439bc7 207 SV *ptr = cop_hints_fetch_pvs(PL_curcop, "regcomp", 0);
1e2e3d02
YO
208 if (ptr && SvIOK(ptr) && SvIV(ptr))
209 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 210 }
664e119d 211
533c011a 212 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 213 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 214
15d9c083 215 if (!DO_UTF8(tmpstr) && SvUTF8(tmpstr)) {
b9ad30b4
NC
216 /* Not doing UTF-8, despite what the SV says. Is this only if
217 we're trapped in use 'bytes'? */
218 /* Make a copy of the octet sequence, but without the flag on,
219 as the compiler now honours the SvUTF8 flag on tmpstr. */
220 STRLEN len;
221 const char *const p = SvPV(tmpstr, len);
222 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
223 }
3e102237 224 else if (SvAMAGIC(tmpstr) || SvGMAGICAL(tmpstr)) {
f3ec07c7 225 /* make a copy to avoid extra stringifies */
0479a84a 226 tmpstr = newSVpvn_flags(t, len, SVs_TEMP | SvUTF8(tmpstr));
f3ec07c7 227 }
c737faaf 228
5a8697a7 229 if (eng)
3ab4a224 230 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
5a8697a7 231 else
3ab4a224 232 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 233
f86aaa29 234 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 235 inside tie/overload accessors. */
c277df42 236 }
4633a7c4 237 }
c737faaf
YO
238
239 re = PM_GETRE(pm);
a0d0e21e 240
72311751 241#ifndef INCOMPLETE_TAINTS
3280af22 242 if (PL_tainting) {
9274aefd
DM
243 if (PL_tainted) {
244 SvTAINTED_on((SV*)re);
07bc277f 245 RX_EXTFLAGS(re) |= RXf_TAINTED;
9274aefd 246 }
72311751
GS
247 }
248#endif
249
220fc49f 250 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 251 pm = PL_curpm;
a0d0e21e 252
c737faaf
YO
253
254#if !defined(USE_ITHREADS)
255 /* can't change the optree at runtime either */
256 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 257 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 258 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 259 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 260 }
c737faaf 261#endif
a0d0e21e
LW
262 RETURN;
263}
264
265PP(pp_substcont)
266{
97aff369 267 dVAR;
39644a26 268 dSP;
c09156bb 269 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
270 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
271 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
272 register char *s = cx->sb_s;
273 register char *m = cx->sb_m;
274 char *orig = cx->sb_orig;
901017d6 275 register REGEXP * const rx = cx->sb_rx;
c445ea15 276 SV *nsv = NULL;
988e6e7e 277 REGEXP *old = PM_GETRE(pm);
f410a211
NC
278
279 PERL_ASYNC_CHECK();
280
988e6e7e 281 if(old != rx) {
bfed75c6 282 if(old)
988e6e7e 283 ReREFCNT_dec(old);
d6106309 284 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
285 }
286
d9f97599 287 rxres_restore(&cx->sb_rxres, rx);
01b35787 288 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 289
a0d0e21e 290 if (cx->sb_iters++) {
a3b680e6 291 const I32 saviters = cx->sb_iters;
a0d0e21e 292 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 293 DIE(aTHX_ "Substitution loop");
a0d0e21e 294
447ee134
DM
295 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
296
ef07e810 297 /* See "how taint works" above pp_subst() */
20be6587
DM
298 if (SvTAINTED(TOPs))
299 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 300 sv_catsv_nomg(dstr, POPs);
2c296965
YO
301 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
302 s -= RX_GOFS(rx);
a0d0e21e
LW
303
304 /* Are we done */
2c296965
YO
305 if (CxONCE(cx) || s < orig ||
306 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
307 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
308 ((cx->sb_rflags & REXEC_COPY_STR)
309 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
310 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 311 {
8ca8a454 312 SV *targ = cx->sb_targ;
748a9306 313
078c425b
JH
314 assert(cx->sb_strend >= s);
315 if(cx->sb_strend > s) {
316 if (DO_UTF8(dstr) && !SvUTF8(targ))
317 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
318 else
319 sv_catpvn(dstr, s, cx->sb_strend - s);
320 }
20be6587
DM
321 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
322 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 323
8ca8a454
NC
324 if (pm->op_pmflags & PMf_NONDESTRUCT) {
325 PUSHs(dstr);
326 /* From here on down we're using the copy, and leaving the
327 original untouched. */
328 targ = dstr;
329 }
330 else {
8ca8a454
NC
331 if (SvIsCOW(targ)) {
332 sv_force_normal_flags(targ, SV_COW_DROP_PV);
333 } else
8ca8a454
NC
334 {
335 SvPV_free(targ);
336 }
337 SvPV_set(targ, SvPVX(dstr));
338 SvCUR_set(targ, SvCUR(dstr));
339 SvLEN_set(targ, SvLEN(dstr));
340 if (DO_UTF8(dstr))
341 SvUTF8_on(targ);
342 SvPV_set(dstr, NULL);
343
4f4d7508 344 mPUSHi(saviters - 1);
48c036b1 345
8ca8a454
NC
346 (void)SvPOK_only_UTF8(targ);
347 }
5cd24f17 348
20be6587 349 /* update the taint state of various various variables in
ef07e810
DM
350 * preparation for final exit.
351 * See "how taint works" above pp_subst() */
20be6587
DM
352 if (PL_tainting) {
353 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
354 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
355 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
356 )
357 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
358
359 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
360 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
361 )
362 SvTAINTED_on(TOPs); /* taint return value */
363 /* needed for mg_set below */
364 PL_tainted = cBOOL(cx->sb_rxtainted &
365 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL));
366 SvTAINT(TARG);
367 }
368 /* PL_tainted must be correctly set for this mg_set */
369 SvSETMAGIC(TARG);
370 TAINT_NOT;
4633a7c4 371 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
372 POPSUBST(cx);
373 RETURNOP(pm->op_next);
20be6587 374 /* NOTREACHED */
a0d0e21e 375 }
8e5e9ebe 376 cx->sb_iters = saviters;
a0d0e21e 377 }
07bc277f 378 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
379 m = s;
380 s = orig;
07bc277f 381 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
382 s = orig + (m - s);
383 cx->sb_strend = s + (cx->sb_strend - m);
384 }
07bc277f 385 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 386 if (m > s) {
bfed75c6 387 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
388 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
389 else
390 sv_catpvn(dstr, s, m-s);
391 }
07bc277f 392 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 393 { /* Update the pos() information. */
8ca8a454
NC
394 SV * const sv
395 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 396 MAGIC *mg;
7a7f3e45 397 SvUPGRADE(sv, SVt_PVMG);
14befaf4 398 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 399#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 400 if (SvIsCOW(sv))
d83f0a82
NC
401 sv_force_normal_flags(sv, 0);
402#endif
403 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
404 NULL, 0);
084916e3 405 }
ce474962 406 mg->mg_len = m - orig;
084916e3 407 }
988e6e7e 408 if (old != rx)
d6106309 409 (void)ReREFCNT_inc(rx);
20be6587 410 /* update the taint state of various various variables in preparation
ef07e810
DM
411 * for calling the code block.
412 * See "how taint works" above pp_subst() */
20be6587
DM
413 if (PL_tainting) {
414 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
415 cx->sb_rxtainted |= SUBST_TAINT_PAT;
416
417 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
418 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
419 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
420 )
421 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
422
423 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
424 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC
425 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
426 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM
427 TAINT_NOT;
428 }
d9f97599 429 rxres_save(&cx->sb_rxres, rx);
af9838cc 430 PL_curpm = pm;
29f2e912 431 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
432}
433
c90c0ff4 434void
864dbfa3 435Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
436{
437 UV *p = (UV*)*rsp;
438 U32 i;
7918f24d
NC
439
440 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 441 PERL_UNUSED_CONTEXT;
c90c0ff4 442
07bc277f 443 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 444#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 445 i = 7 + RX_NPARENS(rx) * 2;
ed252734 446#else
07bc277f 447 i = 6 + RX_NPARENS(rx) * 2;
ed252734 448#endif
c90c0ff4 449 if (!p)
a02a5408 450 Newx(p, i, UV);
c90c0ff4
PP
451 else
452 Renew(p, i, UV);
453 *rsp = (void*)p;
454 }
455
07bc277f 456 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 457 RX_MATCH_COPIED_off(rx);
c90c0ff4 458
f8c7b90f 459#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
460 *p++ = PTR2UV(RX_SAVED_COPY(rx));
461 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
462#endif
463
07bc277f 464 *p++ = RX_NPARENS(rx);
c90c0ff4 465
07bc277f
NC
466 *p++ = PTR2UV(RX_SUBBEG(rx));
467 *p++ = (UV)RX_SUBLEN(rx);
468 for (i = 0; i <= RX_NPARENS(rx); ++i) {
469 *p++ = (UV)RX_OFFS(rx)[i].start;
470 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
471 }
472}
473
9c105995
NC
474static void
475S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
476{
477 UV *p = (UV*)*rsp;
478 U32 i;
7918f24d
NC
479
480 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 481 PERL_UNUSED_CONTEXT;
c90c0ff4 482
ed252734 483 RX_MATCH_COPY_FREE(rx);
cf93c79d 484 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
485 *p++ = 0;
486
f8c7b90f 487#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
488 if (RX_SAVED_COPY(rx))
489 SvREFCNT_dec (RX_SAVED_COPY(rx));
490 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
491 *p++ = 0;
492#endif
493
07bc277f 494 RX_NPARENS(rx) = *p++;
c90c0ff4 495
07bc277f
NC
496 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
497 RX_SUBLEN(rx) = (I32)(*p++);
498 for (i = 0; i <= RX_NPARENS(rx); ++i) {
499 RX_OFFS(rx)[i].start = (I32)(*p++);
500 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
501 }
502}
503
9c105995
NC
504static void
505S_rxres_free(pTHX_ void **rsp)
c90c0ff4 506{
44f8325f 507 UV * const p = (UV*)*rsp;
7918f24d
NC
508
509 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 510 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
511
512 if (p) {
94010e71
NC
513#ifdef PERL_POISON
514 void *tmp = INT2PTR(char*,*p);
515 Safefree(tmp);
516 if (*p)
7e337ee0 517 PoisonFree(*p, 1, sizeof(*p));
94010e71 518#else
56431972 519 Safefree(INT2PTR(char*,*p));
94010e71 520#endif
f8c7b90f 521#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
522 if (p[1]) {
523 SvREFCNT_dec (INT2PTR(SV*,p[1]));
524 }
525#endif
c90c0ff4 526 Safefree(p);
4608196e 527 *rsp = NULL;
c90c0ff4
PP
528 }
529}
530
a701009a
DM
531#define FORM_NUM_BLANK (1<<30)
532#define FORM_NUM_POINT (1<<29)
533
a0d0e21e
LW
534PP(pp_formline)
535{
97aff369 536 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 537 register SV * const tmpForm = *++MARK;
086b26f3
DM
538 SV *formsv; /* contains text of original format */
539 register U32 *fpc; /* format ops program counter */
540 register char *t; /* current append position in target string */
541 const char *f; /* current position in format string */
a0d0e21e 542 register I32 arg;
086b26f3
DM
543 register SV *sv = NULL; /* current item */
544 const char *item = NULL;/* string value of current item */
545 I32 itemsize = 0; /* length of current item, possibly truncated */
546 I32 fieldsize = 0; /* width of current field */
547 I32 lines = 0; /* number of lines that have been output */
548 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
549 const char *chophere = NULL; /* where to chop current item */
f5ada144 550 STRLEN linemark = 0; /* pos of start of line in output */
65202027 551 NV value;
086b26f3 552 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
a0d0e21e 553 STRLEN len;
26e935cf 554 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH
555 bool item_is_utf8 = FALSE;
556 bool targ_is_utf8 = FALSE;
bfed75c6 557 const char *fmt;
74e0ddf7 558 MAGIC *mg = NULL;
4ff700b9
DM
559 U8 *source; /* source of bytes to append */
560 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 561 char trans; /* what chars to translate */
74e0ddf7 562
3808a683 563 mg = doparseform(tmpForm);
a0d0e21e 564
74e0ddf7 565 fpc = (U32*)mg->mg_ptr;
3808a683
DM
566 /* the actual string the format was compiled from.
567 * with overload etc, this may not match tmpForm */
568 formsv = mg->mg_obj;
569
74e0ddf7 570
3280af22 571 SvPV_force(PL_formtarget, len);
3808a683 572 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 573 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH
574 if (DO_UTF8(PL_formtarget))
575 targ_is_utf8 = TRUE;
26e935cf
DM
576 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
577 t = SvGROW(PL_formtarget, len + linemax + 1);
578 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 579 t += len;
3808a683 580 f = SvPV_const(formsv, len);
a0d0e21e
LW
581
582 for (;;) {
583 DEBUG_f( {
bfed75c6 584 const char *name = "???";
a0d0e21e
LW
585 arg = -1;
586 switch (*fpc) {
587 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
588 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
589 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
590 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
591 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
592
593 case FF_CHECKNL: name = "CHECKNL"; break;
594 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
595 case FF_SPACE: name = "SPACE"; break;
596 case FF_HALFSPACE: name = "HALFSPACE"; break;
597 case FF_ITEM: name = "ITEM"; break;
598 case FF_CHOP: name = "CHOP"; break;
599 case FF_LINEGLOB: name = "LINEGLOB"; break;
600 case FF_NEWLINE: name = "NEWLINE"; break;
601 case FF_MORE: name = "MORE"; break;
602 case FF_LINEMARK: name = "LINEMARK"; break;
603 case FF_END: name = "END"; break;
bfed75c6 604 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 605 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
606 }
607 if (arg >= 0)
bf49b057 608 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 609 else
bf49b057 610 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 611 } );
a0d0e21e
LW
612 switch (*fpc++) {
613 case FF_LINEMARK:
f5ada144 614 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW
615 lines++;
616 gotsome = FALSE;
617 break;
618
619 case FF_LITERAL:
ea60cfe8
DM
620 to_copy = *fpc++;
621 source = (U8 *)f;
622 f += to_copy;
623 trans = '~';
75645721 624 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 625 goto append;
a0d0e21e
LW
626
627 case FF_SKIP:
628 f += *fpc++;
629 break;
630
631 case FF_FETCH:
632 arg = *fpc++;
633 f += arg;
634 fieldsize = arg;
635
636 if (MARK < SP)
637 sv = *++MARK;
638 else {
3280af22 639 sv = &PL_sv_no;
a2a5de95 640 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 641 }
125b9982
NT
642 if (SvTAINTED(sv))
643 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW
644 break;
645
646 case FF_CHECKNL:
5a34cab7
NC
647 {
648 const char *send;
649 const char *s = item = SvPV_const(sv, len);
650 itemsize = len;
651 if (DO_UTF8(sv)) {
652 itemsize = sv_len_utf8(sv);
653 if (itemsize != (I32)len) {
654 I32 itembytes;
655 if (itemsize > fieldsize) {
656 itemsize = fieldsize;
657 itembytes = itemsize;
658 sv_pos_u2b(sv, &itembytes, 0);
659 }
660 else
661 itembytes = len;
662 send = chophere = s + itembytes;
663 while (s < send) {
664 if (*s & ~31)
665 gotsome = TRUE;
666 else if (*s == '\n')
667 break;
668 s++;
669 }
670 item_is_utf8 = TRUE;
671 itemsize = s - item;
672 sv_pos_b2u(sv, &itemsize);
673 break;
a0ed51b3 674 }
a0ed51b3 675 }
5a34cab7
NC
676 item_is_utf8 = FALSE;
677 if (itemsize > fieldsize)
678 itemsize = fieldsize;
679 send = chophere = s + itemsize;
680 while (s < send) {
681 if (*s & ~31)
682 gotsome = TRUE;
683 else if (*s == '\n')
684 break;
685 s++;
686 }
687 itemsize = s - item;
688 break;
a0ed51b3 689 }
a0d0e21e
LW
690
691 case FF_CHECKCHOP:
5a34cab7
NC
692 {
693 const char *s = item = SvPV_const(sv, len);
694 itemsize = len;
695 if (DO_UTF8(sv)) {
696 itemsize = sv_len_utf8(sv);
697 if (itemsize != (I32)len) {
698 I32 itembytes;
699 if (itemsize <= fieldsize) {
700 const char *send = chophere = s + itemsize;
701 while (s < send) {
702 if (*s == '\r') {
703 itemsize = s - item;
a0ed51b3 704 chophere = s;
a0ed51b3 705 break;
5a34cab7
NC
706 }
707 if (*s++ & ~31)
a0ed51b3 708 gotsome = TRUE;
a0ed51b3 709 }
a0ed51b3 710 }
5a34cab7
NC
711 else {
712 const char *send;
713 itemsize = fieldsize;
714 itembytes = itemsize;
715 sv_pos_u2b(sv, &itembytes, 0);
716 send = chophere = s + itembytes;
717 while (s < send || (s == send && isSPACE(*s))) {
718 if (isSPACE(*s)) {
719 if (chopspace)
720 chophere = s;
721 if (*s == '\r')
722 break;
723 }
724 else {
725 if (*s & ~31)
726 gotsome = TRUE;
727 if (strchr(PL_chopset, *s))
728 chophere = s + 1;
729 }
730 s++;
731 }
732 itemsize = chophere - item;
733 sv_pos_b2u(sv, &itemsize);
734 }
735 item_is_utf8 = TRUE;
a0d0e21e
LW
736 break;
737 }
a0d0e21e 738 }
5a34cab7
NC
739 item_is_utf8 = FALSE;
740 if (itemsize <= fieldsize) {
741 const char *const send = chophere = s + itemsize;
742 while (s < send) {
743 if (*s == '\r') {
744 itemsize = s - item;
a0d0e21e 745 chophere = s;
a0d0e21e 746 break;
5a34cab7
NC
747 }
748 if (*s++ & ~31)
a0d0e21e 749 gotsome = TRUE;
a0d0e21e 750 }
a0d0e21e 751 }
5a34cab7
NC
752 else {
753 const char *send;
754 itemsize = fieldsize;
755 send = chophere = s + itemsize;
756 while (s < send || (s == send && isSPACE(*s))) {
757 if (isSPACE(*s)) {
758 if (chopspace)
759 chophere = s;
760 if (*s == '\r')
761 break;
762 }
763 else {
764 if (*s & ~31)
765 gotsome = TRUE;
766 if (strchr(PL_chopset, *s))
767 chophere = s + 1;
768 }
769 s++;
770 }
771 itemsize = chophere - item;
772 }
773 break;
a0d0e21e 774 }
a0d0e21e
LW
775
776 case FF_SPACE:
777 arg = fieldsize - itemsize;
778 if (arg) {
779 fieldsize -= arg;
780 while (arg-- > 0)
781 *t++ = ' ';
782 }
783 break;
784
785 case FF_HALFSPACE:
786 arg = fieldsize - itemsize;
787 if (arg) {
788 arg /= 2;
789 fieldsize -= arg;
790 while (arg-- > 0)
791 *t++ = ' ';
792 }
793 break;
794
795 case FF_ITEM:
8aa7beb6
DM
796 to_copy = itemsize;
797 source = (U8 *)item;
798 trans = 1;
799 if (item_is_utf8) {
800 /* convert to_copy from chars to bytes */
801 U8 *s = source;
802 while (to_copy--)
803 s += UTF8SKIP(s);
804 to_copy = s - source;
a0d0e21e 805 }
8aa7beb6 806 goto append;
a0d0e21e
LW
807
808 case FF_CHOP:
5a34cab7
NC
809 {
810 const char *s = chophere;
811 if (chopspace) {
af68e756 812 while (isSPACE(*s))
5a34cab7
NC
813 s++;
814 }
815 sv_chop(sv,s);
816 SvSETMAGIC(sv);
817 break;
a0d0e21e 818 }
a0d0e21e 819
a1b95068
LW
820 case FF_LINESNGL:
821 chopspace = 0;
a0d0e21e 822 case FF_LINEGLOB:
5a34cab7 823 {
e32383e2 824 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 825 const char *s = item = SvPV_const(sv, len);
7440a75b 826 const char *const send = s + len;
7440a75b 827
f3f2f1a3 828 item_is_utf8 = DO_UTF8(sv);
a1137ee5 829 if (!len)
7440a75b 830 break;
ea60cfe8 831 trans = 0;
0d21cefe 832 gotsome = TRUE;
a1137ee5 833 chophere = s + len;
4ff700b9
DM
834 source = (U8 *) s;
835 to_copy = len;
0d21cefe
DM
836 while (s < send) {
837 if (*s++ == '\n') {
838 if (oneline) {
839 to_copy = s - SvPVX_const(sv) - 1;
840 chophere = s;
841 break;
842 } else {
843 if (s == send) {
0d21cefe
DM
844 to_copy--;
845 } else
846 lines++;
1bd51a4c 847 }
a0d0e21e 848 }
0d21cefe 849 }
a2c0032b
DM
850 }
851
ea60cfe8
DM
852 append:
853 /* append to_copy bytes from source to PL_formstring.
854 * item_is_utf8 implies source is utf8.
855 * if trans, translate certain characters during the copy */
a2c0032b
DM
856 {
857 U8 *tmp = NULL;
26e935cf 858 STRLEN grow = 0;
0325ce87
DM
859
860 SvCUR_set(PL_formtarget,
861 t - SvPVX_const(PL_formtarget));
862
0d21cefe
DM
863 if (targ_is_utf8 && !item_is_utf8) {
864 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM
865 } else {
866 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 867 U8 *s;
0d21cefe 868 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM
869 a problem we have a simple solution for.
870 Don't need get magic. */
0d21cefe 871 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 872 targ_is_utf8 = TRUE;
f5ada144
DM
873 /* re-calculate linemark */
874 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM
875 /* the bytes we initially allocated to append the
876 * whole line may have been gobbled up during the
877 * upgrade, so allocate a whole new line's worth
878 * for safety */
879 grow = linemax;
f5ada144
DM
880 while (linemark--)
881 s += UTF8SKIP(s);
882 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 883 }
0d21cefe
DM
884 /* Easy. They agree. */
885 assert (item_is_utf8 == targ_is_utf8);
886 }
26e935cf
DM
887 if (!trans)
888 /* @* and ^* are the only things that can exceed
889 * the linemax, so grow by the output size, plus
890 * a whole new form's worth in case of any further
891 * output */
892 grow = linemax + to_copy;
893 if (grow)
894 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM
895 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
896
897 Copy(source, t, to_copy, char);
ea60cfe8 898 if (trans) {
8aa7beb6
DM
899 /* blank out ~ or control chars, depending on trans.
900 * works on bytes not chars, so relies on not
901 * matching utf8 continuation bytes */
ea60cfe8
DM
902 U8 *s = (U8*)t;
903 U8 *send = s + to_copy;
904 while (s < send) {
8aa7beb6
DM
905 const int ch = *s;
906 if (trans == '~' ? (ch == '~') :
907#ifdef EBCDIC
908 iscntrl(ch)
909#else
910 (!(ch & ~31))
911#endif
912 )
ea60cfe8
DM
913 *s = ' ';
914 s++;
915 }
916 }
917
0d21cefe
DM
918 t += to_copy;
919 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 920 if (tmp)
0d21cefe 921 Safefree(tmp);
5a34cab7 922 break;
a0d0e21e 923 }
a0d0e21e 924
a1b95068
LW
925 case FF_0DECIMAL:
926 arg = *fpc++;
927#if defined(USE_LONG_DOUBLE)
10edeb5d 928 fmt = (const char *)
a701009a 929 ((arg & FORM_NUM_POINT) ?
10edeb5d 930 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 931#else
10edeb5d 932 fmt = (const char *)
a701009a 933 ((arg & FORM_NUM_POINT) ?
10edeb5d 934 "%#0*.*f" : "%0*.*f");
a1b95068
LW
935#endif
936 goto ff_dec;
a0d0e21e 937 case FF_DECIMAL:
a0d0e21e 938 arg = *fpc++;
65202027 939#if defined(USE_LONG_DOUBLE)
10edeb5d 940 fmt = (const char *)
a701009a 941 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 942#else
10edeb5d 943 fmt = (const char *)
a701009a 944 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 945#endif
a1b95068 946 ff_dec:
784707d5
JP
947 /* If the field is marked with ^ and the value is undefined,
948 blank it out. */
a701009a 949 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP
950 arg = fieldsize;
951 while (arg--)
952 *t++ = ' ';
953 break;
954 }
955 gotsome = TRUE;
956 value = SvNV(sv);
a1b95068 957 /* overflow evidence */
bfed75c6 958 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
959 arg = fieldsize;
960 while (arg--)
961 *t++ = '#';
962 break;
963 }
784707d5
JP
964 /* Formats aren't yet marked for locales, so assume "yes". */
965 {
966 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM
967 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
968 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP
969 RESTORE_NUMERIC_STANDARD();
970 }
971 t += fieldsize;
972 break;
a1b95068 973
a0d0e21e
LW
974 case FF_NEWLINE:
975 f++;
f5ada144 976 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW
977 t++;
978 *t++ = '\n';
979 break;
980
981 case FF_BLANK:
982 arg = *fpc++;
983 if (gotsome) {
984 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM
985 fpc--;
986 goto end;
a0d0e21e
LW
987 }
988 }
989 else {
f5ada144 990 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW
991 lines--;
992 }
993 break;
994
995 case FF_MORE:
5a34cab7
NC
996 {
997 const char *s = chophere;
998 const char *send = item + len;
999 if (chopspace) {
af68e756 1000 while (isSPACE(*s) && (s < send))
5a34cab7 1001 s++;
a0d0e21e 1002 }
5a34cab7
NC
1003 if (s < send) {
1004 char *s1;
1005 arg = fieldsize - itemsize;
1006 if (arg) {
1007 fieldsize -= arg;
1008 while (arg-- > 0)
1009 *t++ = ' ';
1010 }
1011 s1 = t - 3;
1012 if (strnEQ(s1," ",3)) {
1013 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
1014 s1--;
1015 }
1016 *s1++ = '.';
1017 *s1++ = '.';
1018 *s1++ = '.';
a0d0e21e 1019 }
5a34cab7 1020 break;
a0d0e21e 1021 }
a0d0e21e 1022 case FF_END:
11f9eeaf 1023 end:
bf2bec63 1024 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 1025 *t = '\0';
b15aece3 1026 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
1027 if (targ_is_utf8)
1028 SvUTF8_on(PL_formtarget);
3280af22 1029 FmLINES(PL_formtarget) += lines;
a0d0e21e 1030 SP = ORIGMARK;
11f9eeaf
DM
1031 if (fpc[-1] == FF_BLANK)
1032 RETURNOP(cLISTOP->op_first);
1033 else
1034 RETPUSHYES;
a0d0e21e
LW
1035 }
1036 }
1037}
1038
1039PP(pp_grepstart)
1040{
27da23d5 1041 dVAR; dSP;
a0d0e21e
LW
1042 SV *src;
1043
3280af22 1044 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 1045 (void)POPMARK;
54310121 1046 if (GIMME_V == G_SCALAR)
6e449a3a 1047 mXPUSHi(0);
533c011a 1048 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 1049 }
3280af22 1050 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC
1051 Perl_pp_pushmark(aTHX); /* push dst */
1052 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 1053 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
1054
1055 SAVETMPS;
59f00321
RGS
1056 if (PL_op->op_private & OPpGREP_LEX)
1057 SAVESPTR(PAD_SVl(PL_op->op_targ));
1058 else
1059 SAVE_DEFSV;
d343c3ef 1060 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1061 SAVEVPTR(PL_curpm);
a0d0e21e 1062
3280af22 1063 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 1064 SvTEMP_off(src);
59f00321
RGS
1065 if (PL_op->op_private & OPpGREP_LEX)
1066 PAD_SVl(PL_op->op_targ) = src;
1067 else
414bf5ae 1068 DEFSV_set(src);
a0d0e21e
LW
1069
1070 PUTBACK;
533c011a 1071 if (PL_op->op_type == OP_MAPSTART)
897d3989 1072 Perl_pp_pushmark(aTHX); /* push top */
533c011a 1073 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
1074}
1075
a0d0e21e
LW
1076PP(pp_mapwhile)
1077{
27da23d5 1078 dVAR; dSP;
f54cb97a 1079 const I32 gimme = GIMME_V;
544f3153 1080 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1081 I32 count;
1082 I32 shift;
1083 SV** src;
ac27b0f5 1084 SV** dst;
a0d0e21e 1085
544f3153 1086 /* first, move source pointer to the next item in the source list */
3280af22 1087 ++PL_markstack_ptr[-1];
544f3153
GS
1088
1089 /* if there are new items, push them into the destination list */
4c90a460 1090 if (items && gimme != G_VOID) {
544f3153
GS
1091 /* might need to make room back there first */
1092 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1093 /* XXX this implementation is very pessimal because the stack
1094 * is repeatedly extended for every set of items. Is possible
1095 * to do this without any stack extension or copying at all
1096 * by maintaining a separate list over which the map iterates
18ef8bea 1097 * (like foreach does). --gsar */
544f3153
GS
1098
1099 /* everything in the stack after the destination list moves
1100 * towards the end the stack by the amount of room needed */
1101 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1102
1103 /* items to shift up (accounting for the moved source pointer) */
1104 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1105
1106 /* This optimization is by Ben Tilly and it does
1107 * things differently from what Sarathy (gsar)
1108 * is describing. The downside of this optimization is
1109 * that leaves "holes" (uninitialized and hopefully unused areas)
1110 * to the Perl stack, but on the other hand this
1111 * shouldn't be a problem. If Sarathy's idea gets
1112 * implemented, this optimization should become
1113 * irrelevant. --jhi */
1114 if (shift < count)
1115 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1116
924508f0
GS
1117 EXTEND(SP,shift);
1118 src = SP;
1119 dst = (SP += shift);
3280af22
NIS
1120 PL_markstack_ptr[-1] += shift;
1121 *PL_markstack_ptr += shift;
544f3153 1122 while (count--)
a0d0e21e
LW
1123 *dst-- = *src--;
1124 }
544f3153 1125 /* copy the new items down to the destination list */
ac27b0f5 1126 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1127 if (gimme == G_ARRAY) {
b2a2a901
DM
1128 /* add returned items to the collection (making mortal copies
1129 * if necessary), then clear the current temps stack frame
1130 * *except* for those items. We do this splicing the items
1131 * into the start of the tmps frame (so some items may be on
59d53fd6 1132 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM
1133 * them, then freeing the frame. That way, the only tmps that
1134 * accumulate over iterations are the return values for map.
1135 * We have to do to this way so that everything gets correctly
1136 * freed if we die during the map.
1137 */
1138 I32 tmpsbase;
1139 I32 i = items;
1140 /* make space for the slice */
1141 EXTEND_MORTAL(items);
1142 tmpsbase = PL_tmps_floor + 1;
1143 Move(PL_tmps_stack + tmpsbase,
1144 PL_tmps_stack + tmpsbase + items,
1145 PL_tmps_ix - PL_tmps_floor,
1146 SV*);
1147 PL_tmps_ix += items;
1148
1149 while (i-- > 0) {
1150 SV *sv = POPs;
1151 if (!SvTEMP(sv))
1152 sv = sv_mortalcopy(sv);
1153 *dst-- = sv;
1154 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1155 }
1156 /* clear the stack frame except for the items */
1157 PL_tmps_floor += items;
1158 FREETMPS;
1159 /* FREETMPS may have cleared the TEMP flag on some of the items */
1160 i = items;
1161 while (i-- > 0)
1162 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1163 }
bfed75c6 1164 else {
22023b26
TP
1165 /* scalar context: we don't care about which values map returns
1166 * (we use undef here). And so we certainly don't want to do mortal
1167 * copies of meaningless values. */
1168 while (items-- > 0) {
b988aa42 1169 (void)POPs;
22023b26
TP
1170 *dst-- = &PL_sv_undef;
1171 }
b2a2a901 1172 FREETMPS;
22023b26 1173 }
a0d0e21e 1174 }
b2a2a901
DM
1175 else {
1176 FREETMPS;
1177 }
d343c3ef 1178 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1179
1180 /* All done yet? */
3280af22 1181 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1182
1183 (void)POPMARK; /* pop top */
d343c3ef 1184 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1185 (void)POPMARK; /* pop src */
3280af22 1186 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1187 (void)POPMARK; /* pop dst */
3280af22 1188 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1189 if (gimme == G_SCALAR) {
7cc47870
RGS
1190 if (PL_op->op_private & OPpGREP_LEX) {
1191 SV* sv = sv_newmortal();
1192 sv_setiv(sv, items);
1193 PUSHs(sv);
1194 }
1195 else {
1196 dTARGET;
1197 XPUSHi(items);
1198 }
a0d0e21e 1199 }
54310121
PP
1200 else if (gimme == G_ARRAY)
1201 SP += items;
a0d0e21e
LW
1202 RETURN;
1203 }
1204 else {
1205 SV *src;
1206
d343c3ef 1207 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1208 SAVEVPTR(PL_curpm);
a0d0e21e 1209
544f3153 1210 /* set $_ to the new source item */
3280af22 1211 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1212 SvTEMP_off(src);
59f00321
RGS
1213 if (PL_op->op_private & OPpGREP_LEX)
1214 PAD_SVl(PL_op->op_targ) = src;
1215 else
414bf5ae 1216 DEFSV_set(src);
a0d0e21e
LW
1217
1218 RETURNOP(cLOGOP->op_other);
1219 }
1220}
1221
a0d0e21e
LW
1222/* Range stuff. */
1223
1224PP(pp_range)
1225{
97aff369 1226 dVAR;
a0d0e21e 1227 if (GIMME == G_ARRAY)
1a67a97c 1228 return NORMAL;
538573f7 1229 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1230 return cLOGOP->op_other;
538573f7 1231 else
1a67a97c 1232 return NORMAL;
a0d0e21e
LW
1233}
1234
1235PP(pp_flip)
1236{
97aff369 1237 dVAR;
39644a26 1238 dSP;
a0d0e21e
LW
1239
1240 if (GIMME == G_ARRAY) {
1a67a97c 1241 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1242 }
1243 else {
1244 dTOPss;
44f8325f 1245 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1246 int flip = 0;
790090df 1247
bfed75c6 1248 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1249 if (GvIO(PL_last_in_gv)) {
1250 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1251 }
1252 else {
fafc274c 1253 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1254 if (gv && GvSV(gv))
1255 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1256 }
bfed75c6
AL
1257 } else {
1258 flip = SvTRUE(sv);
1259 }
1260 if (flip) {
a0d0e21e 1261 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1262 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1263 sv_setiv(targ, 1);
3e3baf6d 1264 SETs(targ);
a0d0e21e
LW
1265 RETURN;
1266 }
1267 else {
1268 sv_setiv(targ, 0);
924508f0 1269 SP--;
1a67a97c 1270 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1271 }
1272 }
76f68e9b 1273 sv_setpvs(TARG, "");
a0d0e21e
LW
1274 SETs(targ);
1275 RETURN;
1276 }
1277}
1278
8e9bbdb9
RGS
1279/* This code tries to decide if "$left .. $right" should use the
1280 magical string increment, or if the range is numeric (we make
1281 an exception for .."0" [#18165]). AMS 20021031. */
1282
1283#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1284 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1285 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1286 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1287 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1288 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1289
a0d0e21e
LW
1290PP(pp_flop)
1291{
97aff369 1292 dVAR; dSP;
a0d0e21e
LW
1293
1294 if (GIMME == G_ARRAY) {
1295 dPOPPOPssrl;
86cb7173 1296
5b295bef
RD
1297 SvGETMAGIC(left);
1298 SvGETMAGIC(right);
a0d0e21e 1299
8e9bbdb9 1300 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1301 register IV i, j;
1302 IV max;
f52e41ad
FC
1303 if ((SvOK(left) && SvNV_nomg(left) < IV_MIN) ||
1304 (SvOK(right) && SvNV_nomg(right) > IV_MAX))
d470f89e 1305 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
1306 i = SvIV_nomg(left);
1307 max = SvIV_nomg(right);
bbce6d69 1308 if (max >= i) {
c1ab3db2
AK
1309 j = max - i + 1;
1310 EXTEND_MORTAL(j);
1311 EXTEND(SP, j);
bbce6d69 1312 }
c1ab3db2
AK
1313 else
1314 j = 0;
1315 while (j--) {
901017d6 1316 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1317 PUSHs(sv);
1318 }
1319 }
1320 else {
3c323193
FC
1321 STRLEN len, llen;
1322 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1323 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1324
3c323193 1325 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1326 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1327 XPUSHs(sv);
b15aece3 1328 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1329 break;
a0d0e21e
LW
1330 sv = sv_2mortal(newSVsv(sv));
1331 sv_inc(sv);
1332 }
a0d0e21e
LW
1333 }
1334 }
1335 else {
1336 dTOPss;
901017d6 1337 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1338 int flop = 0;
a0d0e21e 1339 sv_inc(targ);
4e3399f9
YST
1340
1341 if (PL_op->op_private & OPpFLIP_LINENUM) {
1342 if (GvIO(PL_last_in_gv)) {
1343 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1344 }
1345 else {
fafc274c 1346 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1347 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1348 }
1349 }
1350 else {
1351 flop = SvTRUE(sv);
1352 }
1353
1354 if (flop) {
a0d0e21e 1355 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1356 sv_catpvs(targ, "E0");
a0d0e21e
LW
1357 }
1358 SETs(targ);
1359 }
1360
1361 RETURN;
1362}
1363
1364/* Control. */
1365
27da23d5 1366static const char * const context_name[] = {
515afda2 1367 "pseudo-block",
f31522f3 1368 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1369 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1370 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1371 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1372 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1373 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1374 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1375 "subroutine",
76753e7f 1376 "format",
515afda2 1377 "eval",
515afda2 1378 "substitution",
515afda2
NC
1379};
1380
76e3520e 1381STATIC I32
5db1eb8d 1382S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1383{
97aff369 1384 dVAR;
a0d0e21e 1385 register I32 i;
a0d0e21e 1386
7918f24d
NC
1387 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1388
a0d0e21e 1389 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1390 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1391 switch (CxTYPE(cx)) {
a0d0e21e 1392 case CXt_SUBST:
a0d0e21e 1393 case CXt_SUB:
7766f137 1394 case CXt_FORMAT:
a0d0e21e 1395 case CXt_EVAL:
0a753a76 1396 case CXt_NULL:
dcbac5bb 1397 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1398 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1399 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1400 if (CxTYPE(cx) == CXt_NULL)
1401 return -1;
1402 break;
c6fdafd0 1403 case CXt_LOOP_LAZYIV:
d01136d6 1404 case CXt_LOOP_LAZYSV:
3b719c58
NC
1405 case CXt_LOOP_FOR:
1406 case CXt_LOOP_PLAIN:
7e8f1eac 1407 {
5db1eb8d
BF
1408 STRLEN cx_label_len = 0;
1409 U32 cx_label_flags = 0;
1410 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1411 if (!cx_label || !(
1412 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1413 (flags & SVf_UTF8)
1414 ? (bytes_cmp_utf8(
1415 (const U8*)cx_label, cx_label_len,
1416 (const U8*)label, len) == 0)
1417 : (bytes_cmp_utf8(
1418 (const U8*)label, len,
1419 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF
1420 : (len == cx_label_len && ((cx_label == label)
1421 || memEQ(cx_label, label, len))) )) {
1c98cc53 1422 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1423 (long)i, cx_label));
a0d0e21e
LW
1424 continue;
1425 }
1c98cc53 1426 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1427 return i;
7e8f1eac 1428 }
a0d0e21e
LW
1429 }
1430 }
1431 return i;
1432}
1433
0d863452
RH
1434
1435
e50aee73 1436I32
864dbfa3 1437Perl_dowantarray(pTHX)
e50aee73 1438{
97aff369 1439 dVAR;
f54cb97a 1440 const I32 gimme = block_gimme();
54310121
PP
1441 return (gimme == G_VOID) ? G_SCALAR : gimme;
1442}
1443
1444I32
864dbfa3 1445Perl_block_gimme(pTHX)
54310121 1446{
97aff369 1447 dVAR;
06b5626a 1448 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1449 if (cxix < 0)
46fc3d4c 1450 return G_VOID;
e50aee73 1451
54310121 1452 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1453 case G_VOID:
1454 return G_VOID;
54310121 1455 case G_SCALAR:
e50aee73 1456 return G_SCALAR;
54310121
PP
1457 case G_ARRAY:
1458 return G_ARRAY;
1459 default:
cea2e8a9 1460 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1461 /* NOTREACHED */
1462 return 0;
54310121 1463 }
e50aee73
AD
1464}
1465
78f9721b
SM
1466I32
1467Perl_is_lvalue_sub(pTHX)
1468{
97aff369 1469 dVAR;
06b5626a 1470 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1471 assert(cxix >= 0); /* We should only be called from inside subs */
1472
bafb2adc
NC
1473 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1474 return CxLVAL(cxstack + cxix);
78f9721b
SM
1475 else
1476 return 0;
1477}
1478
777d9014
FC
1479/* only used by PUSHSUB */
1480I32
1481Perl_was_lvalue_sub(pTHX)
1482{
1483 dVAR;
1484 const I32 cxix = dopoptosub(cxstack_ix-1);
1485 assert(cxix >= 0); /* We should only be called from inside subs */
1486
1487 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1488 return CxLVAL(cxstack + cxix);
1489 else
1490 return 0;
1491}
1492
76e3520e 1493STATIC I32
901017d6 1494S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1495{
97aff369 1496 dVAR;
a0d0e21e 1497 I32 i;
7918f24d
NC
1498
1499 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1500
a0d0e21e 1501 for (i = startingblock; i >= 0; i--) {
901017d6 1502 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1503 switch (CxTYPE(cx)) {
a0d0e21e
LW
1504 default:
1505 continue;
1506 case CXt_EVAL:
1507 case CXt_SUB:
7766f137 1508 case CXt_FORMAT:
1c98cc53 1509 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW
1510 return i;
1511 }
1512 }
1513 return i;
1514}
1515
76e3520e 1516STATIC I32
cea2e8a9 1517S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1518{
97aff369 1519 dVAR;
a0d0e21e 1520 I32 i;
a0d0e21e 1521 for (i = startingblock; i >= 0; i--) {
06b5626a 1522 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1523 switch (CxTYPE(cx)) {
a0d0e21e
LW
1524 default:
1525 continue;
1526 case CXt_EVAL:
1c98cc53 1527 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW
1528 return i;
1529 }
1530 }
1531 return i;
1532}
1533
76e3520e 1534STATIC I32
cea2e8a9 1535S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1536{
97aff369 1537 dVAR;
a0d0e21e 1538 I32 i;
a0d0e21e 1539 for (i = startingblock; i >= 0; i--) {
901017d6 1540 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1541 switch (CxTYPE(cx)) {
a0d0e21e 1542 case CXt_SUBST:
a0d0e21e 1543 case CXt_SUB:
7766f137 1544 case CXt_FORMAT:
a0d0e21e 1545 case CXt_EVAL:
0a753a76 1546 case CXt_NULL:
dcbac5bb 1547 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1548 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1549 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1550 if ((CxTYPE(cx)) == CXt_NULL)
1551 return -1;
1552 break;
c6fdafd0 1553 case CXt_LOOP_LAZYIV:
d01136d6 1554 case CXt_LOOP_LAZYSV:
3b719c58
NC
1555 case CXt_LOOP_FOR:
1556 case CXt_LOOP_PLAIN:
1c98cc53 1557 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW
1558 return i;
1559 }
1560 }
1561 return i;
1562}
1563
0d863452
RH
1564STATIC I32
1565S_dopoptogiven(pTHX_ I32 startingblock)
1566{
97aff369 1567 dVAR;
0d863452
RH
1568 I32 i;
1569 for (i = startingblock; i >= 0; i--) {
1570 register const PERL_CONTEXT *cx = &cxstack[i];
1571 switch (CxTYPE(cx)) {
1572 default:
1573 continue;
1574 case CXt_GIVEN:
1c98cc53 1575 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1576 return i;
3b719c58
NC
1577 case CXt_LOOP_PLAIN:
1578 assert(!CxFOREACHDEF(cx));
1579 break;
c6fdafd0 1580 case CXt_LOOP_LAZYIV:
d01136d6 1581 case CXt_LOOP_LAZYSV:
3b719c58 1582 case CXt_LOOP_FOR:
0d863452 1583 if (CxFOREACHDEF(cx)) {
1c98cc53 1584 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH
1585 return i;
1586 }
1587 }
1588 }
1589 return i;
1590}
1591
1592STATIC I32
1593S_dopoptowhen(pTHX_ I32 startingblock)
1594{
97aff369 1595 dVAR;
0d863452
RH
1596 I32 i;
1597 for (i = startingblock; i >= 0; i--) {
1598 register const PERL_CONTEXT *cx = &cxstack[i];
1599 switch (CxTYPE(cx)) {
1600 default:
1601 continue;
1602 case CXt_WHEN:
1c98cc53 1603 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH
1604 return i;
1605 }
1606 }
1607 return i;
1608}
1609
a0d0e21e 1610void
864dbfa3 1611Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1612{
97aff369 1613 dVAR;
a0d0e21e
LW
1614 I32 optype;
1615
f144f1e3
DM
1616 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1617 return;
1618
a0d0e21e 1619 while (cxstack_ix > cxix) {
b0d9ce38 1620 SV *sv;
06b5626a 1621 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1622 DEBUG_CX("UNWIND"); \
a0d0e21e 1623 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1624 switch (CxTYPE(cx)) {
c90c0ff4
PP
1625 case CXt_SUBST:
1626 POPSUBST(cx);
1627 continue; /* not break */
a0d0e21e 1628 case CXt_SUB:
b0d9ce38
GS
1629 POPSUB(cx,sv);
1630 LEAVESUB(sv);
a0d0e21e
LW
1631 break;
1632 case CXt_EVAL:
1633 POPEVAL(cx);
1634 break;
c6fdafd0 1635 case CXt_LOOP_LAZYIV:
d01136d6 1636 case CXt_LOOP_LAZYSV:
3b719c58
NC
1637 case CXt_LOOP_FOR:
1638 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1639 POPLOOP(cx);
1640 break;
0a753a76 1641 case CXt_NULL:
a0d0e21e 1642 break;
7766f137
GS
1643 case CXt_FORMAT:
1644 POPFORMAT(cx);
1645 break;
a0d0e21e 1646 }
c90c0ff4 1647 cxstack_ix--;
a0d0e21e 1648 }
1b6737cc 1649 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1650}
1651
5a844595
GS
1652void
1653Perl_qerror(pTHX_ SV *err)
1654{
97aff369 1655 dVAR;
7918f24d
NC
1656
1657 PERL_ARGS_ASSERT_QERROR;
1658
6b2fb389
DM
1659 if (PL_in_eval) {
1660 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1661 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1662 SVfARG(err));
6b2fb389
DM
1663 }
1664 else
1665 sv_catsv(ERRSV, err);
1666 }
5a844595
GS
1667 else if (PL_errors)
1668 sv_catsv(PL_errors, err);
1669 else
be2597df 1670 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1671 if (PL_parser)
1672 ++PL_parser->error_count;
5a844595
GS
1673}
1674
bb4c52e0 1675void
c5df3096 1676Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1677{
27da23d5 1678 dVAR;
c5df3096 1679 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1680 U8 in_eval = PL_in_eval;
c5df3096 1681 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1682
96d9b9cd 1683 if (in_eval) {
a0d0e21e 1684 I32 cxix;
a0d0e21e 1685 I32 gimme;
a0d0e21e 1686
22a30693
Z
1687 /*
1688 * Historically, perl used to set ERRSV ($@) early in the die
1689 * process and rely on it not getting clobbered during unwinding.
1690 * That sucked, because it was liable to get clobbered, so the
1691 * setting of ERRSV used to emit the exception from eval{} has
1692 * been moved to much later, after unwinding (see just before
1693 * JMPENV_JUMP below). However, some modules were relying on the
1694 * early setting, by examining $@ during unwinding to use it as
1695 * a flag indicating whether the current unwinding was caused by
1696 * an exception. It was never a reliable flag for that purpose,
1697 * being totally open to false positives even without actual
1698 * clobberage, but was useful enough for production code to
1699 * semantically rely on it.
1700 *
1701 * We'd like to have a proper introspective interface that
1702 * explicitly describes the reason for whatever unwinding
1703 * operations are currently in progress, so that those modules
1704 * work reliably and $@ isn't further overloaded. But we don't
1705 * have one yet. In its absence, as a stopgap measure, ERRSV is
1706 * now *additionally* set here, before unwinding, to serve as the
1707 * (unreliable) flag that it used to.
1708 *
1709 * This behaviour is temporary, and should be removed when a
1710 * proper way to detect exceptional unwinding has been developed.
1711 * As of 2010-12, the authors of modules relying on the hack
1712 * are aware of the issue, because the modules failed on
1713 * perls 5.13.{1..7} which had late setting of $@ without this
1714 * early-setting hack.
1715 */
1716 if (!(in_eval & EVAL_KEEPERR)) {
1717 SvTEMP_off(exceptsv);
1718 sv_setsv(ERRSV, exceptsv);
1719 }
1720
5a844595
GS
1721 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1722 && PL_curstackinfo->si_prev)
1723 {
bac4b2ad 1724 dounwind(-1);
d3acc0f7 1725 POPSTACK;
bac4b2ad 1726 }
e336de0d 1727
a0d0e21e
LW
1728 if (cxix >= 0) {
1729 I32 optype;
b6494f15 1730 SV *namesv;
35a4481c 1731 register PERL_CONTEXT *cx;
901017d6 1732 SV **newsp;
8f89e5a9
Z
1733 COP *oldcop;
1734 JMPENV *restartjmpenv;
1735 OP *restartop;
a0d0e21e
LW
1736
1737 if (cxix < cxstack_ix)
1738 dounwind(cxix);
1739
3280af22 1740 POPBLOCK(cx,PL_curpm);
6b35e009 1741 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1742 STRLEN msglen;
96d9b9cd 1743 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1744 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1745 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1746 my_exit(1);
1747 }
1748 POPEVAL(cx);
b6494f15 1749 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z
1750 oldcop = cx->blk_oldcop;
1751 restartjmpenv = cx->blk_eval.cur_top_env;
1752 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1753
1754 if (gimme == G_SCALAR)
3280af22
NIS
1755 *++newsp = &PL_sv_undef;
1756 PL_stack_sp = newsp;
a0d0e21e
LW
1757
1758 LEAVE;
748a9306 1759
7fb6a879
GS
1760 /* LEAVE could clobber PL_curcop (see save_re_context())
1761 * XXX it might be better to find a way to avoid messing with
1762 * PL_curcop in save_re_context() instead, but this is a more
1763 * minimal fix --GSAR */
8f89e5a9 1764 PL_curcop = oldcop;
7fb6a879 1765
7a2e2cd6 1766 if (optype == OP_REQUIRE) {
b6494f15 1767 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1768 SvPVX_const(namesv),
c60dbbc3 1769 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1770 &PL_sv_undef, 0);
27e90453
DM
1771 /* note that unlike pp_entereval, pp_require isn't
1772 * supposed to trap errors. So now that we've popped the
1773 * EVAL that pp_require pushed, and processed the error
1774 * message, rethrow the error */
ecad31f0
BF
1775 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1776 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1777 SVs_TEMP)));
7a2e2cd6 1778 }
c5df3096 1779 if (in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1780 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1781 SVfARG(exceptsv));
96d9b9cd
Z
1782 }
1783 else {
1784 sv_setsv(ERRSV, exceptsv);
1785 }
8f89e5a9
Z
1786 PL_restartjmpenv = restartjmpenv;
1787 PL_restartop = restartop;
bb4c52e0
GG
1788 JMPENV_JUMP(3);
1789 /* NOTREACHED */
a0d0e21e
LW
1790 }
1791 }
87582a92 1792
96d9b9cd 1793 write_to_stderr(exceptsv);
f86702cc
PP
1794 my_failure_exit();
1795 /* NOTREACHED */
a0d0e21e
LW
1796}
1797
1798PP(pp_xor)
1799{
97aff369 1800 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1801 if (SvTRUE(left) != SvTRUE(right))
1802 RETSETYES;
1803 else
1804 RETSETNO;
1805}
1806
8dff4fc5
BM
1807/*
1808=for apidoc caller_cx
1809
1810The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1811returned C<PERL_CONTEXT> structure can be interrogated to find all the
1812information returned to Perl by C<caller>. Note that XSUBs don't get a
1813stack frame, so C<caller_cx(0, NULL)> will return information for the
1814immediately-surrounding Perl code.
1815
1816This function skips over the automatic calls to C<&DB::sub> made on the
1817behalf of the debugger. If the stack frame requested was a sub called by
1818C<DB::sub>, the return value will be the frame for the call to
1819C<DB::sub>, since that has the correct line number/etc. for the call
1820site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1821frame for the sub call itself.
1822
1823=cut
1824*/
1825
1826const PERL_CONTEXT *
1827Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1828{
a0d0e21e 1829 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1830 register const PERL_CONTEXT *cx;
1831 register const PERL_CONTEXT *ccstack = cxstack;
1832 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1833
a0d0e21e 1834 for (;;) {
2c375eb9
GS
1835 /* we may be in a higher stacklevel, so dig down deeper */
1836 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1837 top_si = top_si->si_prev;
1838 ccstack = top_si->si_cxstack;
1839 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1840 }
8dff4fc5
BM
1841 if (cxix < 0)
1842 return NULL;
f2a7f298 1843 /* caller() should not report the automatic calls to &DB::sub */
1844 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1845 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1846 count++;
1847 if (!count--)
1848 break;
2c375eb9 1849 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1850 }
2c375eb9
GS
1851
1852 cx = &ccstack[cxix];
8dff4fc5
BM
1853 if (dbcxp) *dbcxp = cx;
1854
7766f137 1855 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1856 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1857 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1858 field below is defined for any cx. */
f2a7f298 1859 /* caller() should not report the automatic calls to &DB::sub */
1860 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1861 cx = &ccstack[dbcxix];
06a5b730
PP
1862 }
1863
8dff4fc5
BM
1864 return cx;
1865}
1866
1867PP(pp_caller)
1868{
1869 dVAR;
1870 dSP;
1871 register const PERL_CONTEXT *cx;
1872 const PERL_CONTEXT *dbcx;
1873 I32 gimme;
d527ce7c 1874 const HEK *stash_hek;
8dff4fc5 1875 I32 count = 0;
ce0b554b 1876 bool has_arg = MAXARG && TOPs;
8dff4fc5 1877
ce0b554b
FC
1878 if (MAXARG) {
1879 if (has_arg)
8dff4fc5 1880 count = POPi;
ce0b554b
FC
1881 else (void)POPs;
1882 }
8dff4fc5 1883
ce0b554b 1884 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM
1885 if (!cx) {
1886 if (GIMME != G_ARRAY) {
1887 EXTEND(SP, 1);
1888 RETPUSHUNDEF;
1889 }
1890 RETURN;
1891 }
1892
fb55feef 1893 DEBUG_CX("CALLER");
d0279c7c 1894 assert(CopSTASH(cx->blk_oldcop));
d527ce7c 1895 stash_hek = HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop));
a0d0e21e 1896 if (GIMME != G_ARRAY) {
27d41816 1897 EXTEND(SP, 1);
d527ce7c 1898 if (!stash_hek)
3280af22 1899 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1900 else {
1901 dTARGET;
d527ce7c 1902 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1903 PUSHs(TARG);
1904 }
a0d0e21e
LW
1905 RETURN;
1906 }
a0d0e21e 1907
b3ca2e83 1908 EXTEND(SP, 11);
27d41816 1909
d527ce7c 1910 if (!stash_hek)
3280af22 1911 PUSHs(&PL_sv_undef);
d527ce7c
BF
1912 else {
1913 dTARGET;
1914 sv_sethek(TARG, stash_hek);
1915 PUSHTARG;
1916 }
6e449a3a
MHM
1917 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1918 mPUSHi((I32)CopLINE(cx->blk_oldcop));
ce0b554b 1919 if (!has_arg)
a0d0e21e 1920 RETURN;
7766f137 1921 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1922 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1923 /* So is ccstack[dbcxix]. */
07b8c804 1924 if (isGV(cvgv)) {
561b68a9 1925 SV * const sv = newSV(0);
c445ea15 1926 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1927 mPUSHs(sv);
bf38a478 1928 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1929 }
1930 else {
84bafc02 1931 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1932 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1933 }
a0d0e21e
LW
1934 }
1935 else {
84bafc02 1936 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1937 mPUSHi(0);
a0d0e21e 1938 }
54310121
PP
1939 gimme = (I32)cx->blk_gimme;
1940 if (gimme == G_VOID)
3280af22 1941 PUSHs(&PL_sv_undef);
54310121 1942 else
98625aca 1943 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1944 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1945 /* eval STRING */
85a64632 1946 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1947 PUSHs(cx->blk_eval.cur_text);
3280af22 1948 PUSHs(&PL_sv_no);
0f79a09d 1949 }
811a4de9 1950 /* require */
0f79a09d 1951 else if (cx->blk_eval.old_namesv) {
6e449a3a 1952 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1953 PUSHs(&PL_sv_yes);
06a5b730 1954 }
811a4de9
GS
1955 /* eval BLOCK (try blocks have old_namesv == 0) */
1956 else {
1957 PUSHs(&PL_sv_undef);
1958 PUSHs(&PL_sv_undef);
1959 }
4633a7c4 1960 }
a682de96
GS
1961 else {
1962 PUSHs(&PL_sv_undef);
1963 PUSHs(&PL_sv_undef);
1964 }
bafb2adc 1965 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1966 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1967 {
66a1b24b
AL
1968 AV * const ary = cx->blk_sub.argarray;
1969 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1970
e1a80902 1971 Perl_init_dbargs(aTHX);
a0d0e21e 1972
3280af22
NIS
1973 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1974 av_extend(PL_dbargs, AvFILLp(ary) + off);
1975 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1976 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1977 }
f3aa04c2
GS
1978 /* XXX only hints propagated via op_private are currently
1979 * visible (others are not easily accessible, since they
1980 * use the global PL_hints) */
6e449a3a 1981 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1982 {
1983 SV * mask ;
72dc9ed5 1984 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1985
ac27b0f5 1986 if (old_warnings == pWARN_NONE ||
114bafba 1987 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1988 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1989 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1990 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1991 /* Get the bit mask for $warnings::Bits{all}, because
1992 * it could have been extended by warnings::register */
1993 SV **bits_all;
6673a63c 1994 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1995 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1996 mask = newSVsv(*bits_all);
1997 }
1998 else {
1999 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
2000 }
2001 }
e476b1b5 2002 else
72dc9ed5 2003 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 2004 mPUSHs(mask);
e476b1b5 2005 }
b3ca2e83 2006
c28fe1ec 2007 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 2008 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 2009 : &PL_sv_undef);
a0d0e21e
LW
2010 RETURN;
2011}
2012
a0d0e21e
LW
2013PP(pp_reset)
2014{
97aff369 2015 dVAR;
39644a26 2016 dSP;
f650fa72
FC
2017 const char * const tmps =
2018 (MAXARG < 1 || (!TOPs && !POPs)) ? (const char *)"" : POPpconstx;
11faa288 2019 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 2020 PUSHs(&PL_sv_yes);
a0d0e21e
LW
2021 RETURN;
2022}
2023
dd2155a4
DM
2024/* like pp_nextstate, but used instead when the debugger is active */
2025
a0d0e21e
LW
2026PP(pp_dbstate)
2027{
27da23d5 2028 dVAR;
533c011a 2029 PL_curcop = (COP*)PL_op;
a0d0e21e 2030 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 2031 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
2032 FREETMPS;
2033
f410a211
NC
2034 PERL_ASYNC_CHECK();
2035
5df8de69
DM
2036 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
2037 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 2038 {
39644a26 2039 dSP;
c09156bb 2040 register PERL_CONTEXT *cx;
f54cb97a 2041 const I32 gimme = G_ARRAY;
eb160463 2042 U8 hasargs;
0bd48802
AL
2043 GV * const gv = PL_DBgv;
2044 register CV * const cv = GvCV(gv);
a0d0e21e 2045
a0d0e21e 2046 if (!cv)
cea2e8a9 2047 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 2048
aea4f609
DM
2049 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
2050 /* don't do recursive DB::DB call */
a0d0e21e 2051 return NORMAL;
748a9306 2052
a57c6685 2053 ENTER;
4633a7c4
LW
2054 SAVETMPS;
2055
3280af22 2056 SAVEI32(PL_debug);
55497cff 2057 SAVESTACK_POS();
3280af22 2058 PL_debug = 0;
748a9306 2059 hasargs = 0;
924508f0 2060 SPAGAIN;
748a9306 2061
aed2304a 2062 if (CvISXSUB(cv)) {
c127bd3a
SF
2063 CvDEPTH(cv)++;
2064 PUSHMARK(SP);
2065 (void)(*CvXSUB(cv))(aTHX_ cv);
2066 CvDEPTH(cv)--;
2067 FREETMPS;
a57c6685 2068 LEAVE;
c127bd3a
SF
2069 return NORMAL;
2070 }
2071 else {
2072 PUSHBLOCK(cx, CXt_SUB, SP);
2073 PUSHSUB_DB(cx);
2074 cx->blk_sub.retop = PL_op->op_next;
2075 CvDEPTH(cv)++;
2076 SAVECOMPPAD();
2077 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
2078 RETURNOP(CvSTART(cv));
2079 }
a0d0e21e
LW
2080 }
2081 else
2082 return NORMAL;
2083}
2084
b9d76716
VP
2085STATIC SV **
2086S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags)
2087{
9a214eec 2088 bool padtmp = 0;
b9d76716
VP
2089 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2090
9a214eec
DM
2091 if (flags & SVs_PADTMP) {
2092 flags &= ~SVs_PADTMP;
2093 padtmp = 1;
2094 }
b9d76716
VP
2095 if (gimme == G_SCALAR) {
2096 if (MARK < SP)
9a214eec
DM
2097 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2098 ? *SP : sv_mortalcopy(*SP);
b9d76716
VP
2099 else {
2100 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2101 MARK = newsp;
2102 MEXTEND(MARK, 1);
2103 *++MARK = &PL_sv_undef;
2104 return MARK;
2105 }
2106 }
2107 else if (gimme == G_ARRAY) {
2108 /* in case LEAVE wipes old return values */
2109 while (++MARK <= SP) {
9a214eec 2110 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP
2111 *++newsp = *MARK;
2112 else {
2113 *++newsp = sv_mortalcopy(*MARK);
2114 TAINT_NOT; /* Each item is independent */
2115 }
2116 }
2117 /* When this function was called with MARK == newsp, we reach this
2118 * point with SP == newsp. */
2119 }
2120
2121 return newsp;
2122}
2123
2b9a6457
VP
2124PP(pp_enter)
2125{
2126 dVAR; dSP;
2127 register PERL_CONTEXT *cx;
7c2d9d03 2128 I32 gimme = GIMME_V;
2b9a6457
VP
2129
2130 ENTER_with_name("block");
2131
2132 SAVETMPS;
2133 PUSHBLOCK(cx, CXt_BLOCK, SP);
2134
2135 RETURN;
2136}
2137
2138PP(pp_leave)
2139{
2140 dVAR; dSP;
2141 register PERL_CONTEXT *cx;
2142 SV **newsp;
2143 PMOP *newpm;
2144 I32 gimme;
2145
2146 if (PL_op->op_flags & OPf_SPECIAL) {
2147 cx = &cxstack[cxstack_ix];
2148 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2149 }
2150
2151 POPBLOCK(cx,newpm);
2152
2153 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2154
2155 TAINT_NOT;
f02ea43c 2156 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
2b9a6457
VP
2157 PL_curpm = newpm; /* Don't pop $1 et al till now */
2158
2159 LEAVE_with_name("block");
2160
2161 RETURN;
2162}
2163
a0d0e21e
LW
2164PP(pp_enteriter)
2165{
27da23d5 2166 dVAR; dSP; dMARK;
c09156bb 2167 register PERL_CONTEXT *cx;
f54cb97a 2168 const I32 gimme = GIMME_V;
df530c37 2169 void *itervar; /* location of the iteration variable */
840fe433 2170 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2171
d343c3ef 2172 ENTER_with_name("loop1");
4633a7c4
LW
2173 SAVETMPS;
2174
aafca525
DM
2175 if (PL_op->op_targ) { /* "my" variable */
2176 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2177 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2178 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2179 SVs_PADSTALE, SVs_PADSTALE);
2180 }
09edbca0 2181 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2182#ifdef USE_ITHREADS
df530c37 2183 itervar = PL_comppad;
89e00a7c 2184#else
aafca525 2185 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2186#endif
54b9620d 2187 }
aafca525 2188 else { /* symbol table variable */
159b6efe 2189 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2190 SV** svp = &GvSV(gv);
2191 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2192 *svp = newSV(0);
df530c37 2193 itervar = (void *)gv;
54b9620d 2194 }
4633a7c4 2195
0d863452
RH
2196 if (PL_op->op_private & OPpITER_DEF)
2197 cxtype |= CXp_FOR_DEF;
2198
d343c3ef 2199 ENTER_with_name("loop2");
a0d0e21e 2200
7766f137 2201 PUSHBLOCK(cx, cxtype, SP);
df530c37 2202 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2203 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2204 SV *maybe_ary = POPs;
2205 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2206 dPOPss;
d01136d6 2207 SV * const right = maybe_ary;
984a4bea
RD
2208 SvGETMAGIC(sv);
2209 SvGETMAGIC(right);
4fe3f0fa 2210 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2211 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2212 cx->cx_type |= CXt_LOOP_LAZYIV;
2213 /* Make sure that no-one re-orders cop.h and breaks our
2214 assumptions */
2215 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2216#ifdef NV_PRESERVES_UV
f52e41ad
FC
2217 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2218 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2219 ||
f52e41ad
FC
2220 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2221 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2222#else
f52e41ad 2223 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2224 ||
f52e41ad
FC
2225 ((SvNV_nomg(sv) > 0) &&
2226 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2227 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2228 ||
f52e41ad 2229 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2230 ||
f52e41ad
FC
2231 ((SvNV_nomg(right) > 0) &&
2232 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2233 (SvNV_nomg(right) > (NV)UV_MAX))
2234 ))))
a2309040 2235#endif
076d9a11 2236 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2237 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2238 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2239#ifdef DEBUGGING
2240 /* for correct -Dstv display */
2241 cx->blk_oldsp = sp - PL_stack_base;
2242#endif
89ea2908 2243 }
3f63a782 2244 else {
d01136d6
BS
2245 cx->cx_type &= ~CXTYPEMASK;
2246 cx->cx_type |= CXt_LOOP_LAZYSV;
2247 /* Make sure that no-one re-orders cop.h and breaks our
2248 assumptions */
2249 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2250 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2251 cx->blk_loop.state_u.lazysv.end = right;
2252 SvREFCNT_inc(right);
2253 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2254 /* This will do the upgrade to SVt_PV, and warn if the value
2255 is uninitialised. */
10516c54 2256 (void) SvPV_nolen_const(right);
267cc4a8
NC
2257 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2258 to replace !SvOK() with a pointer to "". */
2259 if (!SvOK(right)) {
2260 SvREFCNT_dec(right);
d01136d6 2261 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2262 }
3f63a782 2263 }
89ea2908 2264 }
d01136d6 2265 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2266 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2267 SvREFCNT_inc(maybe_ary);
2268 cx->blk_loop.state_u.ary.ix =
2269 (PL_op->op_private & OPpITER_REVERSED) ?
2270 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2271 -1;
ef3e5ea9 2272 }
89ea2908 2273 }
d01136d6
BS
2274 else { /* iterating over items on the stack */
2275 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2276 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2277 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2278 }
2279 else {
d01136d6 2280 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2281 }
4633a7c4 2282 }
a0d0e21e
LW
2283
2284 RETURN;
2285}
2286
2287PP(pp_enterloop)
2288{
27da23d5 2289 dVAR; dSP;
c09156bb 2290 register PERL_CONTEXT *cx;
f54cb97a 2291 const I32 gimme = GIMME_V;
a0d0e21e 2292
d343c3ef 2293 ENTER_with_name("loop1");
a0d0e21e 2294 SAVETMPS;
d343c3ef 2295 ENTER_with_name("loop2");
a0d0e21e 2296
3b719c58
NC
2297 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2298 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2299
2300 RETURN;
2301}
2302
2303PP(pp_leaveloop)
2304{
27da23d5 2305 dVAR; dSP;
c09156bb 2306 register PERL_CONTEXT *cx;
a0d0e21e
LW
2307 I32 gimme;
2308 SV **newsp;
2309 PMOP *newpm;
2310 SV **mark;
2311
2312 POPBLOCK(cx,newpm);
3b719c58 2313 assert(CxTYPE_is_LOOP(cx));
4fdae800 2314 mark = newsp;
a8bba7fa 2315 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2316
a1f49e72 2317 TAINT_NOT;
b9d76716 2318 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0);
f86702cc
PP
2319 PUTBACK;
2320
a8bba7fa 2321 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2322 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2323
d343c3ef
GG
2324 LEAVE_with_name("loop2");
2325 LEAVE_with_name("loop1");
a0d0e21e 2326
f86702cc 2327 return NORMAL;
a0d0e21e
LW
2328}
2329
3bdf583b
FC
2330STATIC void
2331S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2332 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2333{
80422e24 2334 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2335 if (gimme == G_SCALAR) {
d25b0d7b
FC
2336 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2337 SV *sv;
001de122 2338 const char *what = NULL;
d25b0d7b
FC
2339 if (MARK < SP) {
2340 assert(MARK+1 == SP);
2341 if ((SvPADTMP(TOPs) ||
2342 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2343 == SVf_READONLY
2344 ) &&
2345 !SvSMAGICAL(TOPs)) {
001de122 2346 what =
d25b0d7b 2347 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2348 : "a readonly value" : "a temporary";
d25b0d7b 2349 }
001de122 2350 else goto copy_sv;
d25b0d7b
FC
2351 }
2352 else {
2353 /* sub:lvalue{} will take us here. */
001de122 2354 what = "undef";
d25b0d7b 2355 }
001de122
FC
2356 LEAVE;
2357 cxstack_ix--;
2358 POPSUB(cx,sv);
2359 PL_curpm = newpm;
2360 LEAVESUB(sv);
2361 Perl_croak(aTHX_
2362 "Can't return %s from lvalue subroutine", what
2363 );
d25b0d7b 2364 }
93905212 2365 if (MARK < SP) {
a5ad7a5a 2366 copy_sv:
3bdf583b 2367 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2368 if (!SvPADTMP(*SP)) {
3bdf583b
FC
2369 *++newsp = SvREFCNT_inc(*SP);
2370 FREETMPS;
2371 sv_2mortal(*newsp);
5811c07e
FC
2372 }
2373 else {
2374 /* FREETMPS could clobber it */
2375 SV *sv = SvREFCNT_inc(*SP);
2376 FREETMPS;
2377 *++newsp = sv_mortalcopy(sv);
2378 SvREFCNT_dec(sv);
2379 }
3bdf583b
FC
2380 }
2381 else
e08be60b 2382 *++newsp =
5811c07e
FC
2383 SvPADTMP(*SP)
2384 ? sv_mortalcopy(*SP)
2385 : !SvTEMP(*SP)
e08be60b
FC
2386 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2387 : *SP;
3bdf583b 2388 }
0d235c77
FC
2389 else {
2390 EXTEND(newsp,1);
3bdf583b 2391 *++newsp = &PL_sv_undef;
0d235c77 2392 }
0e9700df 2393 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2394 SvGETMAGIC(TOPs);
2395 if (!SvOK(TOPs)) {
0e9700df 2396 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2397 }
2398 }
3bdf583b
FC
2399 }
2400 else if (gimme == G_ARRAY) {
0e9700df 2401 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2402 if (ref || !CxLVAL(cx))
e08be60b
FC
2403 while (++MARK <= SP)
2404 *++newsp =
5811c07e 2405 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2406 ? sv_mortalcopy(*MARK)
5811c07e
FC
2407 : SvTEMP(*MARK)
2408 ? *MARK
80422e24 2409 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2410 else while (++MARK <= SP) {
d25b0d7b
FC
2411 if (*MARK != &PL_sv_undef
2412 && (SvPADTMP(*MARK)
2413 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2414 == SVf_READONLY
2415 )
2416 ) {
2417 SV *sv;
2418 /* Might be flattened array after $#array = */
2419 PUTBACK;
2420 LEAVE;
2421 cxstack_ix--;
2422 POPSUB(cx,sv);
2423 PL_curpm = newpm;
2424 LEAVESUB(sv);
ae917476 2425 /* diag_listed_as: Can't return %s from lvalue subroutine */
d25b0d7b
FC
2426 Perl_croak(aTHX_
2427 "Can't return a %s from lvalue subroutine",
2428 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2429 }
2430 else
4bee03f8
FC
2431 *++newsp =
2432 SvTEMP(*MARK)
2433 ? *MARK
2434 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2435 }
2436 }
2437 PL_stack_sp = newsp;
2438}
2439
a0d0e21e
LW
2440PP(pp_return)
2441{
27da23d5 2442 dVAR; dSP; dMARK;
c09156bb 2443 register PERL_CONTEXT *cx;
f86702cc 2444 bool popsub2 = FALSE;
b45de488 2445 bool clear_errsv = FALSE;
fa1e92c4 2446 bool lval = FALSE;
a0d0e21e
LW
2447 I32 gimme;
2448 SV **newsp;
2449 PMOP *newpm;
2450 I32 optype = 0;
b6494f15 2451 SV *namesv;
b0d9ce38 2452 SV *sv;
b263a1ad 2453 OP *retop = NULL;
a0d0e21e 2454
0bd48802
AL
2455 const I32 cxix = dopoptosub(cxstack_ix);
2456
9850bf21
RH
2457 if (cxix < 0) {
2458 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2459 * sort block, which is a CXt_NULL
2460 * not a CXt_SUB */
2461 dounwind(0);
d7507f74
RH
2462 PL_stack_base[1] = *PL_stack_sp;
2463 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2464 return 0;
2465 }
9850bf21
RH
2466 else
2467 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2468 }
a0d0e21e
LW
2469 if (cxix < cxstack_ix)
2470 dounwind(cxix);
2471
d7507f74
RH
2472 if (CxMULTICALL(&cxstack[cxix])) {
2473 gimme = cxstack[cxix].blk_gimme;
2474 if (gimme == G_VOID)
2475 PL_stack_sp = PL_stack_base;
2476 else if (gimme == G_SCALAR) {
2477 PL_stack_base[1] = *PL_stack_sp;
2478 PL_stack_sp = PL_stack_base + 1;
2479 }
9850bf21 2480 return 0;
d7507f74 2481 }
9850bf21 2482
a0d0e21e 2483 POPBLOCK(cx,newpm);
6b35e009 2484 switch (CxTYPE(cx)) {
a0d0e21e 2485 case CXt_SUB:
f86702cc 2486 popsub2 = TRUE;
fa1e92c4 2487 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2488 retop = cx->blk_sub.retop;
5dd42e15 2489 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2490 break;
2491 case CXt_EVAL:
b45de488
GS
2492 if (!(PL_in_eval & EVAL_KEEPERR))
2493 clear_errsv = TRUE;
a0d0e21e 2494 POPEVAL(cx);
b6494f15 2495 namesv = cx->blk_eval.old_namesv;
f39bc417 2496 retop = cx->blk_eval.retop;
1d76a5c3
GS
2497 if (CxTRYBLOCK(cx))
2498 break;
748a9306
LW
2499 if (optype == OP_REQUIRE &&
2500 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2501 {
54310121 2502 /* Unassume the success we assumed earlier. */
b6494f15 2503 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2504 SvPVX_const(namesv),
c60dbbc3 2505 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP
2506 G_DISCARD);
2507 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2508 }
a0d0e21e 2509 break;
7766f137
GS
2510 case CXt_FORMAT:
2511 POPFORMAT(cx);
f39bc417 2512 retop = cx->blk_sub.retop;
7766f137 2513 break;
a0d0e21e 2514 default:
5637ef5b 2515 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2516 }
2517
a1f49e72 2518 TAINT_NOT;
d25b0d7b 2519 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC
2520 else {
2521 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2522 if (MARK < SP) {
2523 if (popsub2) {
a8bba7fa 2524 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
6f48390a
FC
2525 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
2526 && !SvMAGICAL(TOPs)) {
a29cdaf0
IZ
2527 *++newsp = SvREFCNT_inc(*SP);
2528 FREETMPS;
2529 sv_2mortal(*newsp);
959e3673
GS
2530 }
2531 else {
2532 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2533 FREETMPS;
959e3673
GS
2534 *++newsp = sv_mortalcopy(sv);
2535 SvREFCNT_dec(sv);
a29cdaf0 2536 }
959e3673 2537 }
6f48390a
FC
2538 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
2539 && !SvMAGICAL(*SP)) {
767eda44 2540 *++newsp = *SP;
767eda44 2541 }
959e3673 2542 else
767eda44 2543 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2544 }
2545 else
a29cdaf0 2546 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2547 }
2548 else
3280af22 2549 *++newsp = &PL_sv_undef;
3bdf583b
FC
2550 }
2551 else if (gimme == G_ARRAY) {
a1f49e72 2552 while (++MARK <= SP) {
3ed94dc0 2553 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
6f48390a 2554 && !SvGMAGICAL(*MARK)
f86702cc 2555 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2556 TAINT_NOT; /* Each item is independent */
2557 }
3bdf583b
FC
2558 }
2559 PL_stack_sp = newsp;
a0d0e21e 2560 }
a0d0e21e 2561
5dd42e15 2562 LEAVE;
f86702cc
PP
2563 /* Stack values are safe: */
2564 if (popsub2) {
5dd42e15 2565 cxstack_ix--;
b0d9ce38 2566 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2567 }
b0d9ce38 2568 else
c445ea15 2569 sv = NULL;
3280af22 2570 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2571
b0d9ce38 2572 LEAVESUB(sv);
8433848b 2573 if (clear_errsv) {
ab69dbc2 2574 CLEAR_ERRSV();
8433848b 2575 }
f39bc417 2576 return retop;
a0d0e21e
LW
2577}
2578
4f443c3d
FC
2579/* This duplicates parts of pp_leavesub, so that it can share code with
2580 * pp_return */
2581PP(pp_leavesublv)
2582{
2583 dVAR; dSP;
4f443c3d
FC
2584 SV **newsp;
2585 PMOP *newpm;
2586 I32 gimme;
2587 register PERL_CONTEXT *cx;
2588 SV *sv;
2589
2590 if (CxMULTICALL(&cxstack[cxstack_ix]))
2591 return 0;
2592
2593 POPBLOCK(cx,newpm);
2594 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC
2595
2596 TAINT_NOT;
2597
0d235c77 2598 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC
2599
2600 LEAVE;
2601 cxstack_ix--;
2602 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2603 PL_curpm = newpm; /* ... and pop $1 et al */
2604
2605 LEAVESUB(sv);
2606 return cx->blk_sub.retop;
2607}
2608
a0d0e21e
LW
2609PP(pp_last)
2610{
27da23d5 2611 dVAR; dSP;
a0d0e21e 2612 I32 cxix;
c09156bb 2613 register PERL_CONTEXT *cx;
f86702cc 2614 I32 pop2 = 0;
a0d0e21e 2615 I32 gimme;
8772537c 2616 I32 optype;
b263a1ad 2617 OP *nextop = NULL;
a0d0e21e
LW
2618 SV **newsp;
2619 PMOP *newpm;
a8bba7fa 2620 SV **mark;
c445ea15 2621 SV *sv = NULL;
9d4ba2ae 2622
a0d0e21e 2623
533c011a 2624 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2625 cxix = dopoptoloop(cxstack_ix);
2626 if (cxix < 0)
a651a37d 2627 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2628 }
2629 else {
5db1eb8d
BF
2630 cxix = dopoptolabel(cPVOP->op_pv, strlen(cPVOP->op_pv),
2631 (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0);
a0d0e21e 2632 if (cxix < 0)
5db1eb8d
BF
2633 DIE(aTHX_ "Label not found for \"last %"SVf"\"",
2634 SVfARG(newSVpvn_flags(cPVOP->op_pv,
2635 strlen(cPVOP->op_pv),
2636 ((cPVOP->op_private & OPpPV_IS_UTF8)
2637 ? SVf_UTF8 : 0) | SVs_TEMP)));
a0d0e21e
LW
2638 }
2639 if (cxix < cxstack_ix)
2640 dounwind(cxix);
2641
2642 POPBLOCK(cx,newpm);
5dd42e15 2643 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2644 mark = newsp;
6b35e009 2645 switch (CxTYPE(cx)) {
c6fdafd0 2646 case CXt_LOOP_LAZYIV:
d01136d6 2647 case CXt_LOOP_LAZYSV:
3b719c58
NC
2648 case CXt_LOOP_FOR:
2649 case CXt_LOOP_PLAIN:
2650 pop2 = CxTYPE(cx);
a8bba7fa 2651 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2652 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2653 break;
f86702cc 2654 case CXt_SUB:
f86702cc 2655 pop2 = CXt_SUB;
f39bc417 2656 nextop = cx->blk_sub.retop;
a0d0e21e 2657 break;
f86702cc
PP
2658 case CXt_EVAL:
2659 POPEVAL(cx);
f39bc417 2660 nextop = cx->blk_eval.retop;
a0d0e21e 2661 break;
7766f137
GS
2662 case CXt_FORMAT:
2663 POPFORMAT(cx);
f39bc417 2664 nextop = cx->blk_sub.retop;
7766f137 2665 break;
a0d0e21e 2666 default:
5637ef5b 2667 DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2668 }
2669
a1f49e72 2670 TAINT_NOT;
b9d76716
VP
2671 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme,
2672 pop2 == CXt_SUB ? SVs_TEMP : 0);
f86702cc
PP
2673 PUTBACK;
2674
5dd42e15
DM
2675 LEAVE;
2676 cxstack_ix--;
f86702cc
PP
2677 /* Stack values are safe: */
2678 switch (pop2) {
c6fdafd0 2679 case CXt_LOOP_LAZYIV:
3b719c58 2680 case CXt_LOOP_PLAIN:
d01136d6 2681 case CXt_LOOP_LAZYSV:
3b719c58 2682 case CXt_LOOP_FOR:
a8bba7fa 2683 POPLOOP(cx); /* release loop vars ... */
4fdae800 2684 LEAVE;
f86702cc
PP
2685 break;
2686 case CXt_SUB:
b0d9ce38 2687 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2688 break;
a0d0e21e 2689 }
3280af22 2690 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2691
b0d9ce38 2692 LEAVESUB(sv);
9d4ba2ae
AL
2693 PERL_UNUSED_VAR(optype);
2694 PERL_UNUSED_VAR(gimme);
f86702cc 2695 return nextop;
a0d0e21e
LW
2696}
2697
2698PP(pp_next)
2699{
27da23d5 2700 dVAR;
a0d0e21e 2701 I32 cxix;
c09156bb 2702 register PERL_CONTEXT *cx;
85538317 2703 I32 inner;
a0d0e21e 2704
533c011a 2705 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2706 cxix = dopoptoloop(cxstack_ix);
2707 if (cxix < 0)
a651a37d 2708 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2709 }
2710 else {
5db1eb8d
BF
2711 cxix = dopoptolabel(cPVOP->op_pv, strlen(cPVOP->op_pv),
2712 (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0);
2713 if (cxix < 0)
2714 DIE(aTHX_ "Label not found for \"next %"SVf"\"",
2715 SVfARG(newSVpvn_flags(cPVOP->op_pv,
2716 strlen(cPVOP->op_pv),
2717 ((cPVOP->op_private & OPpPV_IS_UTF8)
2718 ? SVf_UTF8 : 0) | SVs_TEMP)));
a0d0e21e
LW
2719 }
2720 if (cxix < cxstack_ix)
2721 dounwind(cxix);
2722
85538317
GS
2723 /* clear off anything above the scope we're re-entering, but
2724 * save the rest until after a possible continue block */
2725 inner = PL_scopestack_ix;
1ba6ee2b 2726 TOPBLOCK(cx);
85538317
GS
2727 if (PL_scopestack_ix < inner)
2728 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2729 PL_curcop = cx->blk_oldcop;
d57ce4df 2730 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2731}
2732
2733PP(pp_redo)
2734{
27da23d5 2735 dVAR;
a0d0e21e 2736 I32 cxix;
c09156bb 2737 register PERL_CONTEXT *cx;
a0d0e21e 2738 I32 oldsave;
a034e688 2739 OP* redo_op;
a0d0e21e 2740
533c011a 2741 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2742 cxix = dopoptoloop(cxstack_ix);
2743 if (cxix < 0)
a651a37d 2744 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2745 }
2746 else {
5db1eb8d
BF
2747 cxix = dopoptolabel(cPVOP->op_pv, strlen(cPVOP->op_pv),
2748 (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0);
2749 if (cxix < 0)
2750 DIE(aTHX_ "Label not found for \"redo %"SVf"\"",
2751 SVfARG(newSVpvn_flags(cPVOP->op_pv,
2752 strlen(cPVOP->op_pv),
2753 ((cPVOP->op_private & OPpPV_IS_UTF8)
2754 ? SVf_UTF8 : 0) | SVs_TEMP)));
a0d0e21e
LW
2755 }
2756 if (cxix < cxstack_ix)
2757 dounwind(cxix);
2758
022eaa24 2759 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2760 if (redo_op->op_type == OP_ENTER) {
2761 /* pop one less context to avoid $x being freed in while (my $x..) */
2762 cxstack_ix++;
2763 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2764 redo_op = redo_op->op_next;
2765 }
2766
a0d0e21e 2767 TOPBLOCK(cx);
3280af22 2768 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2769 LEAVE_SCOPE(oldsave);
936c78b5 2770 FREETMPS;
3a1b2b9e 2771 PL_curcop = cx->blk_oldcop;
a034e688 2772 return redo_op;
a0d0e21e
LW
2773}
2774
0824fdcb 2775STATIC OP *
5db1eb8d 2776S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2777{
97aff369 2778 dVAR;
a0d0e21e 2779 OP **ops = opstack;
bfed75c6 2780 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2781
7918f24d
NC
2782 PERL_ARGS_ASSERT_DOFINDLABEL;
2783
fc36a67e 2784 if (ops >= oplimit)
cea2e8a9 2785 Perl_croak(aTHX_ too_deep);
11343788
MB
2786 if (o->op_type == OP_LEAVE ||
2787 o->op_type == OP_SCOPE ||
2788 o->op_type == OP_LEAVELOOP ||
33d34e4c 2789 o->op_type == OP_LEAVESUB ||
11343788 2790 o->op_type == OP_LEAVETRY)
fc36a67e 2791 {
5dc0d613 2792 *ops++ = cUNOPo->op_first;
fc36a67e 2793 if (ops >= oplimit)
cea2e8a9 2794 Perl_croak(aTHX_ too_deep);
fc36a67e 2795 }
c4aa4e48 2796 *ops = 0;
11343788 2797 if (o->op_flags & OPf_KIDS) {
aec46f14 2798 OP *kid;
a0d0e21e 2799 /* First try all the kids at this level, since that's likeliest. */
11343788 2800 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac 2801 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF
2802 STRLEN kid_label_len;
2803 U32 kid_label_flags;
2804 const char *kid_label = CopLABEL_len_flags(kCOP,
2805 &kid_label_len, &kid_label_flags);
2806 if (kid_label && (
2807 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2808 (flags & SVf_UTF8)
2809 ? (bytes_cmp_utf8(
2810 (const U8*)kid_label, kid_label_len,
2811 (const U8*)label, len) == 0)
2812 : (bytes_cmp_utf8(
2813 (const U8*)label, len,
2814 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF
2815 : ( len == kid_label_len && ((kid_label == label)
2816 || memEQ(kid_label, label, len)))))
7e8f1eac
AD
2817 return kid;
2818 }
a0d0e21e 2819 }
11343788 2820 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2821 if (kid == PL_lastgotoprobe)
a0d0e21e 2822 continue;
ed8d0fe2
SM
2823 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2824 if (ops == opstack)
2825 *ops++ = kid;
2826 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2827 ops[-1]->op_type == OP_DBSTATE)
2828 ops[-1] = kid;
2829 else
2830 *ops++ = kid;
2831 }
5db1eb8d 2832 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2833 return o;
a0d0e21e
LW
2834 }
2835 }
c4aa4e48 2836 *ops = 0;
a0d0e21e
LW
2837 return 0;
2838}
2839
a0d0e21e
LW
2840PP(pp_goto)
2841{
27da23d5 2842 dVAR; dSP;
cbbf8932 2843 OP *retop = NULL;
a0d0e21e 2844 I32 ix;
c09156bb 2845 register PERL_CONTEXT *cx;
fc36a67e
PP
2846#define GOTO_DEPTH 64
2847 OP *enterops[GOTO_DEPTH];
cbbf8932 2848 const char *label = NULL;
5db1eb8d
BF
2849 STRLEN label_len = 0;
2850 U32 label_flags = 0;
bfed75c6
AL
2851 const bool do_dump = (PL_op->op_type == OP_DUMP);
2852 static const char must_have_label[] = "goto must have label";
a0d0e21e 2853
533c011a 2854 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2855 SV * const sv = POPs;
a0d0e21e
LW
2856
2857 /* This egregious kludge implements goto &subroutine */
2858 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2859 I32 cxix;
c09156bb 2860 register PERL_CONTEXT *cx;
ea726b52 2861 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2862 SV** mark;
2863 I32 items = 0;
2864 I32 oldsave;
b1464ded 2865 bool reified = 0;
a0d0e21e 2866
e8f7dd13 2867 retry:
4aa0a1f7 2868 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2869 const GV * const gv = CvGV(cv);
e8f7dd13 2870 if (gv) {
7fc63493 2871 GV *autogv;
e8f7dd13
GS
2872 SV *tmpstr;
2873 /* autoloaded stub? */
2874 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2875 goto retry;
c271df94
BF
2876 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2877 GvNAMELEN(gv),
2878 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2879 if (autogv && (cv = GvCV(autogv)))
2880 goto retry;
2881 tmpstr = sv_newmortal();
c445ea15 2882 gv_efullname3(tmpstr, gv, NULL);
be2597df 2883 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2884 }
cea2e8a9 2885 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2886 }
2887
a0d0e21e 2888 /* First do some returnish stuff. */
b37c2d43 2889 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2890 FREETMPS;
a0d0e21e
LW
2891 cxix = dopoptosub(cxstack_ix);
2892 if (cxix < 0)
cea2e8a9 2893 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2894 if (cxix < cxstack_ix)
2895 dounwind(cxix);
2896 TOPBLOCK(cx);
2d43a17f 2897 SPAGAIN;
564abe23 2898 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2899 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89 2900 if (CxREALEVAL(cx))
00455a92 2901 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM
2902 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2903 else
00455a92 2904 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2905 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2906 }
9850bf21
RH
2907 else if (CxMULTICALL(cx))
2908 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2909 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2910 /* put @_ back onto stack */
a0d0e21e 2911 AV* av = cx->blk_sub.argarray;
bfed75c6 2912
93965878 2913 items = AvFILLp(av) + 1;
a45cdc79
DM
2914 EXTEND(SP, items+1); /* @_ could have been extended. */
2915 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2916 SvREFCNT_dec(GvAV(PL_defgv));
2917 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2918 CLEAR_ARGARRAY(av);
d8b46c1b 2919 /* abandon @_ if it got reified */
62b1ebc2 2920 if (AvREAL(av)) {
b1464ded
DM
2921 reified = 1;
2922 SvREFCNT_dec(av);
d8b46c1b
GS
2923 av = newAV();
2924 av_extend(av, items-1);
11ca45c0 2925 AvREIFY_only(av);
ad64d0ec 2926 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2927 }
a0d0e21e 2928 }
aed2304a 2929 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2930 AV* const av = GvAV(PL_defgv);
1fa4e549 2931 items = AvFILLp(av) + 1;
a45cdc79
DM
2932 EXTEND(SP, items+1); /* @_ could have been extended. */
2933 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2934 }
a45cdc79
DM
2935 mark = SP;
2936 SP += items;
6b35e009 2937 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2938 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2939 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2940 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2941 LEAVE_SCOPE(oldsave);
2942
1d59c038
FC
2943 /* A destructor called during LEAVE_SCOPE could have undefined
2944 * our precious cv. See bug #99850. */
2945 if (!CvROOT(cv) && !CvXSUB(cv)) {
2946 const GV * const gv = CvGV(cv);
2947 if (gv) {
2948 SV * const tmpstr = sv_newmortal();
2949 gv_efullname3(tmpstr, gv, NULL);
2950 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2951 SVfARG(tmpstr));
2952 }
2953 DIE(aTHX_ "Goto undefined subroutine");
2954 }
2955
a0d0e21e
LW
2956 /* Now do some callish stuff. */
2957 SAVETMPS;
5023d17a 2958 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2959 if (CvISXSUB(cv)) {
b37c2d43 2960 OP* const retop = cx->blk_sub.retop;
9d63fa07
KW
2961 SV **newsp PERL_UNUSED_DECL;
2962 I32 gimme PERL_UNUSED_DECL;
b1464ded
DM
2963 if (reified) {
2964 I32 index;
2965 for (index=0; index<items; index++)
2966 sv_2mortal(SP[-index]);
2967 }
1fa4e549 2968
b37c2d43
AL
2969 /* XS subs don't have a CxSUB, so pop it */
2970 POPBLOCK(cx, PL_curpm);
2971 /* Push a mark for the start of arglist */
2972 PUSHMARK(mark);
2973 PUTBACK;
2974 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2975 LEAVE;
5eff7df7 2976 return retop;
a0d0e21e
LW
2977 }
2978 else {
b37c2d43 2979 AV* const padlist = CvPADLIST(cv);
6b35e009 2980 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2981 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2982 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2983 cx->cx_type = CXt_SUB;
b150fb22 2984 }
a0d0e21e 2985 cx->blk_sub.cv = cv;
1a5b3db4 2986 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2987
a0d0e21e
LW
2988 CvDEPTH(cv)++;
2989 if (CvDEPTH(cv) < 2)
74c765eb 2990 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2991 else {
2b9dff67 2992 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2993 sub_crush_depth(cv);
26019298 2994 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2995 }
426a09cd 2996 PL_curcop = cx->blk_oldcop;
fd617465
DM
2997 SAVECOMPPAD();
2998 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2999 if (CxHASARGS(cx))
6d4ff0d2 3000 {
502c6561 3001 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 3002
3280af22 3003 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 3004 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 3005 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 3006 cx->blk_sub.argarray = av;
a0d0e21e
LW
3007
3008 if (items >= AvMAX(av) + 1) {
b37c2d43 3009 SV **ary = AvALLOC(av);
a0d0e21e
LW
3010 if (AvARRAY(av) != ary) {
3011 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 3012 AvARRAY(av) = ary;
a0d0e21e
LW
3013 }
3014 if (items >= AvMAX(av) + 1) {
3015 AvMAX(av) = items - 1;
3016 Renew(ary,items+1,SV*);
3017 AvALLOC(av) = ary;
9c6bc640 3018 AvARRAY(av) = ary;
a0d0e21e
LW
3019 }
3020 }
a45cdc79 3021 ++mark;
a0d0e21e 3022 Copy(mark,AvARRAY(av),items,SV*);
93965878 3023 AvFILLp(av) = items - 1;
d8b46c1b 3024 assert(!AvREAL(av));
b1464ded
DM
3025 if (reified) {
3026 /* transfer 'ownership' of refcnts to new @_ */
3027 AvREAL_on(av);
3028 AvREIFY_off(av);
3029 }
a0d0e21e
LW
3030 while (items--) {
3031 if (*mark)
3032 SvTEMP_off(*mark);
3033 mark++;
3034 }
3035 }
491527d0 3036 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 3037 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 3038 if (PERLDB_GOTO) {
b96d8cd9 3039 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
3040 if (gotocv) {
3041 PUSHMARK( PL_stack_sp );
ad64d0ec 3042 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
3043 PL_stack_sp--;
3044 }
491527d0 3045 }
1ce6579f 3046 }
a0d0e21e
LW
3047 RETURNOP(CvSTART(cv));
3048 }
3049 }
1614b0e3 3050 else {
5db1eb8d
BF
3051 label = SvPV_const(sv, label_len);
3052 label_flags = SvUTF8(sv);
1614b0e3 3053 }
a0d0e21e 3054 }
2fc690dc 3055 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
5db1eb8d
BF
3056 label = cPVOP->op_pv;
3057 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
3058 label_len = strlen(label);
3059 }
2fc690dc 3060 if (!(do_dump || label_len)) DIE(aTHX_ must_have_label);
a0d0e21e 3061
f410a211
NC
3062 PERL_ASYNC_CHECK();
3063
3532f34a 3064 if (label_len) {
cbbf8932 3065 OP *gotoprobe = NULL;
3b2447bc 3066 bool leaving_eval = FALSE;
33d34e4c 3067 bool in_block = FALSE;
cbbf8932 3068 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
3069
3070 /* find label */
3071
d4c19fe8 3072 PL_lastgotoprobe = NULL;
a0d0e21e
LW
3073 *enterops = 0;
3074 for (ix = cxstack_ix; ix >= 0; ix--) {
3075 cx = &cxstack[ix];
6b35e009 3076 switch (CxTYPE(cx)) {
a0d0e21e 3077 case CXt_EVAL:
3b2447bc 3078 leaving_eval = TRUE;
971ecbe6 3079 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
3080 gotoprobe = (last_eval_cx ?
3081 last_eval_cx->blk_eval.old_eval_root :
3082 PL_eval_root);
3083 last_eval_cx = cx;
9c5794fe
RH
3084 break;
3085 }
3086 /* else fall through */
c6fdafd0 3087 case CXt_LOOP_LAZYIV:
d01136d6 3088 case CXt_LOOP_LAZYSV:
3b719c58
NC
3089 case CXt_LOOP_FOR:
3090 case CXt_LOOP_PLAIN:
bb5aedc1
VP
3091 case CXt_GIVEN:
3092 case CXt_WHEN:
a0d0e21e
LW
3093 gotoprobe = cx->blk_oldcop->op_sibling;
3094 break;
3095 case CXt_SUBST:
3096 continue;
3097 case CXt_BLOCK:
33d34e4c 3098 if (ix) {
a0d0e21e 3099 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
3100 in_block = TRUE;
3101 } else
3280af22 3102 gotoprobe = PL_main_root;
a0d0e21e 3103 break;
b3933176 3104 case CXt_SUB:
9850bf21 3105 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
3106 gotoprobe = CvROOT(cx->blk_sub.cv);
3107 break;
3108 }
3109 /* FALL THROUGH */
7766f137 3110 case CXt_FORMAT:
0a753a76 3111 case CXt_NULL:
a651a37d 3112 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
3113 default:
3114 if (ix)
5637ef5b
NC
3115 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
3116 CxTYPE(cx), (long) ix);
3280af22 3117 gotoprobe = PL_main_root;
a0d0e21e
LW
3118 break;
3119 }
2b597662 3120 if (gotoprobe) {
5db1eb8d 3121 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS
3122 enterops, enterops + GOTO_DEPTH);
3123 if (retop)
3124 break;
eae48c89
Z
3125 if (gotoprobe->op_sibling &&
3126 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3127 gotoprobe->op_sibling->op_sibling) {
3128 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
5db1eb8d
BF
3129 label, label_len, label_flags, enterops,
3130 enterops + GOTO_DEPTH);
eae48c89
Z
3131 if (retop)
3132 break;
3133 }
2b597662 3134 }
3280af22 3135 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
3136 }
3137 if (!retop)
5db1eb8d
BF
3138 DIE(aTHX_ "Can't find label %"SVf,
3139 SVfARG(newSVpvn_flags(label, label_len,
3140 SVs_TEMP | label_flags)));
a0d0e21e 3141
3b2447bc
RH
3142 /* if we're leaving an eval, check before we pop any frames
3143 that we're not going to punt, otherwise the error
3144 won't be caught */
3145
3146 if (leaving_eval && *enterops && enterops[1]) {
3147 I32 i;
3148 for (i = 1; enterops[i]; i++)
3149 if (enterops[i]->op_type == OP_ENTERITER)
3150 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3151 }
3152
b500e03b
GG
3153 if (*enterops && enterops[1]) {
3154 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3155 if (enterops[i])
3156 deprecate("\"goto\" to jump into a construct");
3157 }
3158
a0d0e21e
LW
3159 /* pop unwanted frames */
3160
3161 if (ix < cxstack_ix) {
3162 I32 oldsave;
3163
3164 if (ix < 0)
3165 ix = 0;
3166 dounwind(ix);
3167 TOPBLOCK(cx);
3280af22 3168 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3169 LEAVE_SCOPE(oldsave);
3170 }
3171
3172 /* push wanted frames */
3173
748a9306 3174 if (*enterops && enterops[1]) {
0bd48802 3175 OP * const oldop = PL_op;
33d34e4c
AE
3176 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3177 for (; enterops[ix]; ix++) {
533c011a 3178 PL_op = enterops[ix];
84902520
TB
3179 /* Eventually we may want to stack the needed arguments
3180 * for each op. For now, we punt on the hard ones. */
533c011a 3181 if (PL_op->op_type == OP_ENTERITER)
894356b3 3182 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3183 PL_op->op_ppaddr(aTHX);
a0d0e21e 3184 }
533c011a 3185 PL_op = oldop;
a0d0e21e
LW
3186 }
3187 }
3188
3189 if (do_dump) {
a5f75d66 3190#ifdef VMS
6b88bc9c 3191 if (!retop) retop = PL_main_start;
a5f75d66 3192#endif
3280af22
NIS
3193 PL_restartop = retop;
3194 PL_do_undump = TRUE;
a0d0e21e
LW
3195
3196 my_unexec();
3197
3280af22
NIS
3198 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3199 PL_do_undump = FALSE;
a0d0e21e
LW
3200 }
3201
3202 RETURNOP(retop);
3203}
3204
3205PP(pp_exit)
3206{
97aff369 3207 dVAR;
39644a26 3208 dSP;
a0d0e21e
LW
3209 I32 anum;
3210
3211 if (MAXARG < 1)
3212 anum = 0;
9d3c658e
FC
3213 else if (!TOPs) {
3214 anum = 0; (void)POPs;
3215 }
ff0cee69 3216 else {
a0d0e21e 3217 anum = SvIVx(POPs);
d98f61e7
GS
3218#ifdef VMS
3219 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 3220 anum = 0;
96e176bf 3221 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3222#endif
3223 }
cc3604b1 3224 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
3225#ifdef PERL_MAD
3226 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3227 if (anum || !(PL_minus_c && PL_madskills))
3228 my_exit(anum);
3229#else
a0d0e21e 3230 my_exit(anum);
81d86705 3231#endif
3280af22 3232 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3233 RETURN;
3234}
3235
a0d0e21e
LW
3236/* Eval. */
3237
0824fdcb 3238STATIC void
cea2e8a9 3239S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3240{
504618e9 3241 const char *s = SvPVX_const(sv);
890ce7af 3242 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3243 I32 line = 1;
a0d0e21e 3244
7918f24d
NC
3245 PERL_ARGS_ASSERT_SAVE_LINES;
3246
a0d0e21e 3247 while (s && s < send) {
f54cb97a 3248 const char *t;
b9f83d2f 3249 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3250
1d963ff3 3251 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3252 if (t)
3253 t++;
3254 else
3255 t = send;
3256
3257 sv_setpvn(tmpstr, s, t - s);
3258 av_store(array, line++, tmpstr);
3259 s = t;
3260 }
3261}
3262
22f16304
RU
3263/*
3264=for apidoc docatch
3265
3266Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3267
32680 is used as continue inside eval,
3269
32703 is used for a die caught by an inner eval - continue inner loop
3271
3272See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3273establish a local jmpenv to handle exception traps.
3274
3275=cut
3276*/
0824fdcb 3277STATIC OP *
cea2e8a9 3278S_docatch(pTHX_ OP *o)
1e422769 3279{
97aff369 3280 dVAR;
6224f72b 3281 int ret;
06b5626a 3282 OP * const oldop = PL_op;
db36c5a1 3283 dJMPENV;
1e422769 3284
1e422769 3285#ifdef DEBUGGING
54310121 3286 assert(CATCH_GET == TRUE);
1e422769 3287#endif
312caa8e 3288 PL_op = o;
8bffa5f8 3289
14dd3ad8 3290 JMPENV_PUSH(ret);
6224f72b 3291 switch (ret) {
312caa8e 3292 case 0:
abd70938
DM
3293 assert(cxstack_ix >= 0);
3294 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3295 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3296 redo_body:
85aaa934 3297 CALLRUNOPS(aTHX);
312caa8e
CS
3298 break;
3299 case 3:
8bffa5f8 3300 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3301 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3302 PL_restartjmpenv = NULL;
312caa8e
CS
3303 PL_op = PL_restartop;
3304 PL_restartop = 0;
3305 goto redo_body;
3306 }
3307 /* FALL THROUGH */
3308 default:
14dd3ad8 3309 JMPENV_POP;
533c011a 3310 PL_op = oldop;
6224f72b 3311 JMPENV_JUMP(ret);
1e422769 3312 /* NOTREACHED */
1e422769 3313 }
14dd3ad8 3314 JMPENV_POP;
533c011a 3315 PL_op = oldop;
5f66b61c 3316 return NULL;
1e422769
PP
3317}
3318
ee23ad3b
NC
3319/* James Bond: Do you expect me to talk?
3320 Auric Goldfinger: No, Mr. Bond. I expect you to die.
3321
3322 This code is an ugly hack, doesn't work with lexicals in subroutines that are
3323 called more than once, and is only used by regcomp.c, for (?{}) blocks.
3324
3325 Currently it is not used outside the core code. Best if it stays that way.
d59a8b3e
NC
3326
3327 Hence it's now deprecated, and will be removed.
ee23ad3b 3328*/
c277df42 3329OP *
bfed75c6 3330Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
3331/* sv Text to convert to OP tree. */
3332/* startop op_free() this to undo. */
3333/* code Short string id of the caller. */
3334{
d59a8b3e
NC
3335 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
3336 return Perl_sv_compile_2op_is_broken(aTHX_ sv, startop, code, padp);
3337}
3338
3339/* Don't use this. It will go away without warning once the regexp engine is
3340 refactored not to use it. */
3341OP *
3342Perl_sv_compile_2op_is_broken(pTHX_ SV *sv, OP **startop, const char *code,
3343 PAD **padp)
3344{
27da23d5 3345 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
3346 PERL_CONTEXT *cx;
3347 SV **newsp;
b094c71d 3348 I32 gimme = G_VOID;
c277df42
IZ
3349 I32 optype;
3350 OP dummy;
83ee9e09
GS
3351 char tbuf[TYPE_DIGITS(long) + 12 + 10];
3352 char *tmpbuf = tbuf;
c277df42 3353 char *safestr;
a3985cdc 3354 int runtime;
601f1833 3355 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 3356 STRLEN len;
634d6919 3357 bool need_catch;
c277df42 3358
d59a8b3e 3359 PERL_ARGS_ASSERT_SV_COMPILE_2OP_IS_BROKEN;
7918f24d 3360
d343c3ef 3361 ENTER_with_name("eval");
27fcb6ee 3362 lex_start(sv, NULL, LEX_START_SAME_FILTER);
c277df42
IZ
3363 SAVETMPS;
3364 /* switch to eval mode */
3365
923e4eb5 3366 if (IN_PERL_COMPILETIME) {
f4dd75d9 3367 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 3368 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 3369 }
83ee9e09 3370 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 3371 SV * const sv = sv_newmortal();
83ee9e09
GS
3372 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
3373 code, (unsigned long)++PL_evalseq,
3374 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
3375 tmpbuf = SvPVX(sv);
fc009855 3376 len = SvCUR(sv);
83ee9e09
GS
3377 }
3378 else
d9fad198
JH
3379 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
3380 (unsigned long)++PL_evalseq);
f4dd75d9 3381 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3382 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 3383 SAVECOPLINE(&PL_compiling);
57843af0 3384 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
3385 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3386 deleting the eval's FILEGV from the stash before gv_check() runs
3387 (i.e. before run-time proper). To work around the coredump that
3388 ensues, we always turn GvMULTI_on for any globals that were
3389 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
3390 safestr = savepvn(tmpbuf, len);
3391 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 3392 SAVEHINTS();
d1ca3daa 3393#ifdef OP_IN_REGISTER
6b88bc9c 3394 PL_opsave = op;
d1ca3daa 3395#else
7766f137 3396 SAVEVPTR(PL_op);
d1ca3daa 3397#endif
c277df42 3398
a3985cdc 3399 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 3400 runtime = IN_PERL_RUNTIME;
a3985cdc 3401 if (runtime)
558b4424 3402 {
d819b83a 3403 runcv = find_runcv(NULL);
a3985cdc 3404
558b4424
FC
3405 /* At run time, we have to fetch the hints from PL_curcop. */
3406 PL_hints = PL_curcop->cop_hints;
3407 if (PL_hints & HINT_LOCALIZE_HH) {
3408 /* SAVEHINTS created a new HV in PL_hintgv, which we
3409 need to GC */
3410 SvREFCNT_dec(GvHV(PL_hintgv));
3411 GvHV(PL_hintgv) =
3412 refcounted_he_chain_2hv(PL_curcop->cop_hints_hash, 0);
3413 hv_magic(GvHV(PL_hintgv), NULL, PERL_MAGIC_hints);
3414 }
3415 SAVECOMPILEWARNINGS();
3416 PL_compiling.cop_warnings = DUP_WARNINGS(PL_curcop->cop_warnings);
3417 cophh_free(CopHINTHASH_get(&PL_compiling));
3418 /* XXX Does this need to avoid copying a label? */
3419 PL_compiling.cop_hints_hash
3420 = cophh_copy(PL_curcop->cop_hints_hash);
3421 }
3422
533c011a 3423 PL_op = &dummy;
13b51b79 3424 PL_op->op_type = OP_ENTEREVAL;
533c011a 3425 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 3426 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 3427 PUSHEVAL(cx, 0);
634d6919
GG
3428 need_catch = CATCH_GET;
3429 CATCH_SET(TRUE);
a3985cdc
DM
3430
3431 if (runtime)
f45b078d 3432 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq, NULL);
a3985cdc 3433 else
f45b078d 3434 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax, NULL);
634d6919 3435 CATCH_SET(need_catch);
13b51b79 3436 POPBLOCK(cx,PL_curpm);
e84b9f1f 3437 POPEVAL(cx);
c277df42
IZ
3438
3439