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Add OPpLVALUE flag
[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;
0b4182de 72 TAINT_NOT;
2cd61cdb
IZ
73 return NORMAL;
74}
75
b3eb6a9b
GS
76PP(pp_regcomp)
77{
97aff369 78 dVAR;
39644a26 79 dSP;
eb578fdb 80 PMOP *pm = (PMOP*)cLOGOP->op_other;
9f141731 81 SV **args;
df787a7b 82 int nargs;
84679df5 83 REGEXP *re = NULL;
9f141731
DM
84 REGEXP *new_re;
85 const regexp_engine *eng;
dbc200c5 86 bool is_bare_re= FALSE;
bfed75c6 87
df787a7b
DM
88 if (PL_op->op_flags & OPf_STACKED) {
89 dMARK;
90 nargs = SP - MARK;
91 args = ++MARK;
92 }
93 else {
94 nargs = 1;
95 args = SP;
96 }
97
4b5a0d1c 98 /* prevent recompiling under /o and ithreads. */
3db8f154 99#if defined(USE_ITHREADS)
131b3ad0 100 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
df787a7b 101 SP = args-1;
131b3ad0
DM
102 RETURN;
103 }
513629ba 104#endif
d4b87e75 105
9f141731
DM
106 re = PM_GETRE(pm);
107 assert (re != (REGEXP*) &PL_sv_undef);
108 eng = re ? RX_ENGINE(re) : current_re_engine();
109
dbc200c5
YO
110 /*
111 In the below logic: these are basically the same - check if this regcomp is part of a split.
112
113 (PL_op->op_pmflags & PMf_split )
114 (PL_op->op_next->op_type == OP_PUSHRE)
115
116 We could add a new mask for this and copy the PMf_split, if we did
117 some bit definition fiddling first.
118
119 For now we leave this
120 */
121
3c13cae6
DM
122 new_re = (eng->op_comp
123 ? eng->op_comp
124 : &Perl_re_op_compile
125 )(aTHX_ args, nargs, pm->op_code_list, eng, re,
346d3070 126 &is_bare_re,
dbc200c5 127 (pm->op_pmflags & RXf_PMf_FLAGCOPYMASK),
a5ae69f0
DM
128 pm->op_pmflags |
129 (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
dbc200c5 130
346d3070 131 if (pm->op_pmflags & PMf_HAS_CV)
8d919b0a 132 ReANY(new_re)->qr_anoncv
9fe3265f 133 = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
9f141731
DM
134
135 if (is_bare_re) {
136 REGEXP *tmp;
137 /* The match's LHS's get-magic might need to access this op's regexp
138 (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
139 get-magic now before we replace the regexp. Hopefully this hack can
140 be replaced with the approach described at
141 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
142 some day. */
143 if (pm->op_type == OP_MATCH) {
144 SV *lhs;
284167a5 145 const bool was_tainted = TAINT_get;
9f141731
DM
146 if (pm->op_flags & OPf_STACKED)
147 lhs = args[-1];
148 else if (pm->op_private & OPpTARGET_MY)
149 lhs = PAD_SV(pm->op_targ);
150 else lhs = DEFSV;
151 SvGETMAGIC(lhs);
152 /* Restore the previous value of PL_tainted (which may have been
153 modified by get-magic), to avoid incorrectly setting the
284167a5
SM
154 RXf_TAINTED flag with RX_TAINT_on further down. */
155 TAINT_set(was_tainted);
9a9b5ec9
DM
156#if NO_TAINT_SUPPORT
157 PERL_UNUSED_VAR(was_tainted);
158#endif
df787a7b 159 }
9f141731
DM
160 tmp = reg_temp_copy(NULL, new_re);
161 ReREFCNT_dec(new_re);
162 new_re = tmp;
df787a7b 163 }
dbc200c5 164
9f141731
DM
165 if (re != new_re) {
166 ReREFCNT_dec(re);
167 PM_SETRE(pm, new_re);
c277df42 168 }
d4b87e75 169
dbc200c5 170
284167a5 171 if (TAINTING_get && TAINT_get) {
9f141731 172 SvTAINTED_on((SV*)new_re);
284167a5 173 RX_TAINT_on(new_re);
72311751 174 }
72311751 175
c737faaf
YO
176#if !defined(USE_ITHREADS)
177 /* can't change the optree at runtime either */
178 /* PMf_KEEP is handled differently under threads to avoid these problems */
9f141731
DM
179 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
180 pm = PL_curpm;
a0d0e21e 181 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 182 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 183 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 184 }
c737faaf 185#endif
9f141731 186
df787a7b 187 SP = args-1;
a0d0e21e
LW
188 RETURN;
189}
190
9f141731 191
a0d0e21e
LW
192PP(pp_substcont)
193{
97aff369 194 dVAR;
39644a26 195 dSP;
eb578fdb
KW
196 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
197 PMOP * const pm = (PMOP*) cLOGOP->op_other;
198 SV * const dstr = cx->sb_dstr;
199 char *s = cx->sb_s;
200 char *m = cx->sb_m;
a0d0e21e 201 char *orig = cx->sb_orig;
eb578fdb 202 REGEXP * const rx = cx->sb_rx;
c445ea15 203 SV *nsv = NULL;
988e6e7e 204 REGEXP *old = PM_GETRE(pm);
f410a211
NC
205
206 PERL_ASYNC_CHECK();
207
988e6e7e 208 if(old != rx) {
bfed75c6 209 if(old)
988e6e7e 210 ReREFCNT_dec(old);
d6106309 211 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
212 }
213
d9f97599 214 rxres_restore(&cx->sb_rxres, rx);
c90c0ff4 215
a0d0e21e 216 if (cx->sb_iters++) {
a3b680e6 217 const I32 saviters = cx->sb_iters;
a0d0e21e 218 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 219 DIE(aTHX_ "Substitution loop");
a0d0e21e 220
447ee134
DM
221 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
222
ef07e810 223 /* See "how taint works" above pp_subst() */
20be6587
DM
224 if (SvTAINTED(TOPs))
225 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 226 sv_catsv_nomg(dstr, POPs);
2c296965 227 if (CxONCE(cx) || s < orig ||
03c83e26
DM
228 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
229 (s == m), cx->sb_targ, NULL,
d5e7783a 230 (REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW)))
a0d0e21e 231 {
8ca8a454 232 SV *targ = cx->sb_targ;
748a9306 233
078c425b
JH
234 assert(cx->sb_strend >= s);
235 if(cx->sb_strend > s) {
236 if (DO_UTF8(dstr) && !SvUTF8(targ))
4bac9ae4 237 sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
078c425b 238 else
4bac9ae4 239 sv_catpvn_nomg(dstr, s, cx->sb_strend - s);
078c425b 240 }
20be6587
DM
241 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
242 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 243
8ca8a454
NC
244 if (pm->op_pmflags & PMf_NONDESTRUCT) {
245 PUSHs(dstr);
246 /* From here on down we're using the copy, and leaving the
247 original untouched. */
248 targ = dstr;
249 }
250 else {
9e0ea7f3
FC
251 SV_CHECK_THINKFIRST_COW_DROP(targ);
252 if (isGV(targ)) Perl_croak_no_modify();
253 SvPV_free(targ);
8ca8a454
NC
254 SvPV_set(targ, SvPVX(dstr));
255 SvCUR_set(targ, SvCUR(dstr));
256 SvLEN_set(targ, SvLEN(dstr));
257 if (DO_UTF8(dstr))
258 SvUTF8_on(targ);
259 SvPV_set(dstr, NULL);
260
52c47e16 261 PL_tainted = 0;
4f4d7508 262 mPUSHi(saviters - 1);
48c036b1 263
8ca8a454
NC
264 (void)SvPOK_only_UTF8(targ);
265 }
5cd24f17 266
20be6587 267 /* update the taint state of various various variables in
ef07e810
DM
268 * preparation for final exit.
269 * See "how taint works" above pp_subst() */
284167a5 270 if (TAINTING_get) {
20be6587
DM
271 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
272 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
273 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
274 )
275 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
276
277 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
278 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
279 )
280 SvTAINTED_on(TOPs); /* taint return value */
281 /* needed for mg_set below */
284167a5
SM
282 TAINT_set(
283 cBOOL(cx->sb_rxtainted &
284 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))
285 );
20be6587
DM
286 SvTAINT(TARG);
287 }
288 /* PL_tainted must be correctly set for this mg_set */
289 SvSETMAGIC(TARG);
290 TAINT_NOT;
4633a7c4 291 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e 292 POPSUBST(cx);
47c9d59f 293 PERL_ASYNC_CHECK();
a0d0e21e 294 RETURNOP(pm->op_next);
118e2215 295 assert(0); /* NOTREACHED */
a0d0e21e 296 }
8e5e9ebe 297 cx->sb_iters = saviters;
a0d0e21e 298 }
07bc277f 299 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
300 m = s;
301 s = orig;
6502e081 302 assert(!RX_SUBOFFSET(rx));
07bc277f 303 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
304 s = orig + (m - s);
305 cx->sb_strend = s + (cx->sb_strend - m);
306 }
07bc277f 307 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 308 if (m > s) {
bfed75c6 309 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
4bac9ae4 310 sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv);
db79b45b 311 else
4bac9ae4 312 sv_catpvn_nomg(dstr, s, m-s);
db79b45b 313 }
07bc277f 314 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 315 { /* Update the pos() information. */
8ca8a454
NC
316 SV * const sv
317 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 318 MAGIC *mg;
96c2a8ff
FC
319 if (!(mg = mg_find_mglob(sv))) {
320 mg = sv_magicext_mglob(sv);
084916e3 321 }
25fdce4a
FC
322 assert(SvPOK(dstr));
323 MgBYTEPOS_set(mg, sv, SvPVX(dstr), m - orig);
084916e3 324 }
988e6e7e 325 if (old != rx)
d6106309 326 (void)ReREFCNT_inc(rx);
20be6587 327 /* update the taint state of various various variables in preparation
ef07e810
DM
328 * for calling the code block.
329 * See "how taint works" above pp_subst() */
284167a5 330 if (TAINTING_get) {
20be6587
DM
331 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
332 cx->sb_rxtainted |= SUBST_TAINT_PAT;
333
334 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
335 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
336 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
337 )
338 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
339
340 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
341 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC
342 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
343 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM
344 TAINT_NOT;
345 }
d9f97599 346 rxres_save(&cx->sb_rxres, rx);
af9838cc 347 PL_curpm = pm;
29f2e912 348 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
349}
350
c90c0ff4 351void
864dbfa3 352Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
353{
354 UV *p = (UV*)*rsp;
355 U32 i;
7918f24d
NC
356
357 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 358 PERL_UNUSED_CONTEXT;
c90c0ff4 359
07bc277f 360 if (!p || p[1] < RX_NPARENS(rx)) {
db2c6cb3 361#ifdef PERL_ANY_COW
6502e081 362 i = 7 + (RX_NPARENS(rx)+1) * 2;
ed252734 363#else
6502e081 364 i = 6 + (RX_NPARENS(rx)+1) * 2;
ed252734 365#endif
c90c0ff4 366 if (!p)
a02a5408 367 Newx(p, i, UV);
c90c0ff4
PP
368 else
369 Renew(p, i, UV);
370 *rsp = (void*)p;
371 }
372
5eabab15
DM
373 /* what (if anything) to free on croak */
374 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 375 RX_MATCH_COPIED_off(rx);
6c31ff74 376 *p++ = RX_NPARENS(rx);
c90c0ff4 377
db2c6cb3 378#ifdef PERL_ANY_COW
bdd9a1b1
NC
379 *p++ = PTR2UV(RX_SAVED_COPY(rx));
380 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
381#endif
382
07bc277f
NC
383 *p++ = PTR2UV(RX_SUBBEG(rx));
384 *p++ = (UV)RX_SUBLEN(rx);
6502e081
DM
385 *p++ = (UV)RX_SUBOFFSET(rx);
386 *p++ = (UV)RX_SUBCOFFSET(rx);
07bc277f
NC
387 for (i = 0; i <= RX_NPARENS(rx); ++i) {
388 *p++ = (UV)RX_OFFS(rx)[i].start;
389 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
390 }
391}
392
9c105995
NC
393static void
394S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
395{
396 UV *p = (UV*)*rsp;
397 U32 i;
7918f24d
NC
398
399 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 400 PERL_UNUSED_CONTEXT;
c90c0ff4 401
ed252734 402 RX_MATCH_COPY_FREE(rx);
cf93c79d 403 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 404 *p++ = 0;
6c31ff74 405 RX_NPARENS(rx) = *p++;
c90c0ff4 406
db2c6cb3 407#ifdef PERL_ANY_COW
bdd9a1b1
NC
408 if (RX_SAVED_COPY(rx))
409 SvREFCNT_dec (RX_SAVED_COPY(rx));
410 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
411 *p++ = 0;
412#endif
413
07bc277f
NC
414 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
415 RX_SUBLEN(rx) = (I32)(*p++);
6502e081
DM
416 RX_SUBOFFSET(rx) = (I32)*p++;
417 RX_SUBCOFFSET(rx) = (I32)*p++;
07bc277f
NC
418 for (i = 0; i <= RX_NPARENS(rx); ++i) {
419 RX_OFFS(rx)[i].start = (I32)(*p++);
420 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
421 }
422}
423
9c105995
NC
424static void
425S_rxres_free(pTHX_ void **rsp)
c90c0ff4 426{
44f8325f 427 UV * const p = (UV*)*rsp;
7918f24d
NC
428
429 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 430 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
431
432 if (p) {
94010e71 433 void *tmp = INT2PTR(char*,*p);
6c31ff74 434#ifdef PERL_POISON
db2c6cb3 435#ifdef PERL_ANY_COW
6c31ff74 436 U32 i = 9 + p[1] * 2;
94010e71 437#else
6c31ff74 438 U32 i = 8 + p[1] * 2;
94010e71 439#endif
6c31ff74
NC
440#endif
441
db2c6cb3 442#ifdef PERL_ANY_COW
6c31ff74 443 SvREFCNT_dec (INT2PTR(SV*,p[2]));
ed252734 444#endif
6c31ff74
NC
445#ifdef PERL_POISON
446 PoisonFree(p, i, sizeof(UV));
447#endif
448
449 Safefree(tmp);
c90c0ff4 450 Safefree(p);
4608196e 451 *rsp = NULL;
c90c0ff4
PP
452 }
453}
454
a701009a
DM
455#define FORM_NUM_BLANK (1<<30)
456#define FORM_NUM_POINT (1<<29)
457
a0d0e21e
LW
458PP(pp_formline)
459{
97aff369 460 dVAR; dSP; dMARK; dORIGMARK;
eb578fdb 461 SV * const tmpForm = *++MARK;
086b26f3 462 SV *formsv; /* contains text of original format */
eb578fdb
KW
463 U32 *fpc; /* format ops program counter */
464 char *t; /* current append position in target string */
086b26f3 465 const char *f; /* current position in format string */
eb578fdb
KW
466 I32 arg;
467 SV *sv = NULL; /* current item */
086b26f3
DM
468 const char *item = NULL;/* string value of current item */
469 I32 itemsize = 0; /* length of current item, possibly truncated */
470 I32 fieldsize = 0; /* width of current field */
471 I32 lines = 0; /* number of lines that have been output */
472 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
473 const char *chophere = NULL; /* where to chop current item */
f5ada144 474 STRLEN linemark = 0; /* pos of start of line in output */
65202027 475 NV value;
086b26f3 476 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
a0d0e21e 477 STRLEN len;
26e935cf 478 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH
479 bool item_is_utf8 = FALSE;
480 bool targ_is_utf8 = FALSE;
bfed75c6 481 const char *fmt;
74e0ddf7 482 MAGIC *mg = NULL;
4ff700b9
DM
483 U8 *source; /* source of bytes to append */
484 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 485 char trans; /* what chars to translate */
74e0ddf7 486
3808a683 487 mg = doparseform(tmpForm);
a0d0e21e 488
74e0ddf7 489 fpc = (U32*)mg->mg_ptr;
3808a683
DM
490 /* the actual string the format was compiled from.
491 * with overload etc, this may not match tmpForm */
492 formsv = mg->mg_obj;
493
74e0ddf7 494
3280af22 495 SvPV_force(PL_formtarget, len);
3808a683 496 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 497 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH
498 if (DO_UTF8(PL_formtarget))
499 targ_is_utf8 = TRUE;
26e935cf
DM
500 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
501 t = SvGROW(PL_formtarget, len + linemax + 1);
502 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 503 t += len;
3808a683 504 f = SvPV_const(formsv, len);
a0d0e21e
LW
505
506 for (;;) {
507 DEBUG_f( {
bfed75c6 508 const char *name = "???";
a0d0e21e
LW
509 arg = -1;
510 switch (*fpc) {
511 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
512 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
513 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
514 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
515 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
516
517 case FF_CHECKNL: name = "CHECKNL"; break;
518 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
519 case FF_SPACE: name = "SPACE"; break;
520 case FF_HALFSPACE: name = "HALFSPACE"; break;
521 case FF_ITEM: name = "ITEM"; break;
522 case FF_CHOP: name = "CHOP"; break;
523 case FF_LINEGLOB: name = "LINEGLOB"; break;
524 case FF_NEWLINE: name = "NEWLINE"; break;
525 case FF_MORE: name = "MORE"; break;
526 case FF_LINEMARK: name = "LINEMARK"; break;
527 case FF_END: name = "END"; break;
bfed75c6 528 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 529 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
530 }
531 if (arg >= 0)
bf49b057 532 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 533 else
bf49b057 534 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 535 } );
a0d0e21e
LW
536 switch (*fpc++) {
537 case FF_LINEMARK:
f5ada144 538 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW
539 lines++;
540 gotsome = FALSE;
541 break;
542
543 case FF_LITERAL:
ea60cfe8
DM
544 to_copy = *fpc++;
545 source = (U8 *)f;
546 f += to_copy;
547 trans = '~';
75645721 548 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 549 goto append;
a0d0e21e
LW
550
551 case FF_SKIP:
552 f += *fpc++;
553 break;
554
555 case FF_FETCH:
556 arg = *fpc++;
557 f += arg;
558 fieldsize = arg;
559
560 if (MARK < SP)
561 sv = *++MARK;
562 else {
3280af22 563 sv = &PL_sv_no;
a2a5de95 564 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 565 }
125b9982
NT
566 if (SvTAINTED(sv))
567 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW
568 break;
569
570 case FF_CHECKNL:
5a34cab7
NC
571 {
572 const char *send;
573 const char *s = item = SvPV_const(sv, len);
574 itemsize = len;
575 if (DO_UTF8(sv)) {
576 itemsize = sv_len_utf8(sv);
577 if (itemsize != (I32)len) {
578 I32 itembytes;
579 if (itemsize > fieldsize) {
580 itemsize = fieldsize;
581 itembytes = itemsize;
582 sv_pos_u2b(sv, &itembytes, 0);
583 }
584 else
585 itembytes = len;
586 send = chophere = s + itembytes;
587 while (s < send) {
077dbbf3 588 if (! isCNTRL(*s))
5a34cab7
NC
589 gotsome = TRUE;
590 else if (*s == '\n')
591 break;
592 s++;
593 }
594 item_is_utf8 = TRUE;
595 itemsize = s - item;
596 sv_pos_b2u(sv, &itemsize);
597 break;
a0ed51b3 598 }
a0ed51b3 599 }
5a34cab7
NC
600 item_is_utf8 = FALSE;
601 if (itemsize > fieldsize)
602 itemsize = fieldsize;
603 send = chophere = s + itemsize;
604 while (s < send) {
077dbbf3 605 if (! isCNTRL(*s))
5a34cab7
NC
606 gotsome = TRUE;
607 else if (*s == '\n')
608 break;
609 s++;
610 }
611 itemsize = s - item;
612 break;
a0ed51b3 613 }
a0d0e21e
LW
614
615 case FF_CHECKCHOP:
5a34cab7
NC
616 {
617 const char *s = item = SvPV_const(sv, len);
618 itemsize = len;
619 if (DO_UTF8(sv)) {
620 itemsize = sv_len_utf8(sv);
621 if (itemsize != (I32)len) {
622 I32 itembytes;
623 if (itemsize <= fieldsize) {
624 const char *send = chophere = s + itemsize;
625 while (s < send) {
626 if (*s == '\r') {
627 itemsize = s - item;
a0ed51b3 628 chophere = s;
a0ed51b3 629 break;
5a34cab7 630 }
077dbbf3 631 if (! isCNTRL(*s))
a0ed51b3 632 gotsome = TRUE;
077dbbf3 633 s++;
a0ed51b3 634 }
a0ed51b3 635 }
5a34cab7
NC
636 else {
637 const char *send;
638 itemsize = fieldsize;
639 itembytes = itemsize;
640 sv_pos_u2b(sv, &itembytes, 0);
641 send = chophere = s + itembytes;
642 while (s < send || (s == send && isSPACE(*s))) {
643 if (isSPACE(*s)) {
644 if (chopspace)
645 chophere = s;
646 if (*s == '\r')
647 break;
648 }
649 else {
077dbbf3 650 if (! isCNTRL(*s))
5a34cab7
NC
651 gotsome = TRUE;
652 if (strchr(PL_chopset, *s))
653 chophere = s + 1;
654 }
655 s++;
656 }
657 itemsize = chophere - item;
658 sv_pos_b2u(sv, &itemsize);
659 }
660 item_is_utf8 = TRUE;
a0d0e21e
LW
661 break;
662 }
a0d0e21e 663 }
5a34cab7
NC
664 item_is_utf8 = FALSE;
665 if (itemsize <= fieldsize) {
666 const char *const send = chophere = s + itemsize;
667 while (s < send) {
668 if (*s == '\r') {
669 itemsize = s - item;
a0d0e21e 670 chophere = s;
a0d0e21e 671 break;
5a34cab7 672 }
077dbbf3 673 if (! isCNTRL(*s))
a0d0e21e 674 gotsome = TRUE;
077dbbf3 675 s++;
a0d0e21e 676 }
a0d0e21e 677 }
5a34cab7
NC
678 else {
679 const char *send;
680 itemsize = fieldsize;
681 send = chophere = s + itemsize;
682 while (s < send || (s == send && isSPACE(*s))) {
683 if (isSPACE(*s)) {
684 if (chopspace)
685 chophere = s;
686 if (*s == '\r')
687 break;
688 }
689 else {
077dbbf3 690 if (! isCNTRL(*s))
5a34cab7
NC
691 gotsome = TRUE;
692 if (strchr(PL_chopset, *s))
693 chophere = s + 1;
694 }
695 s++;
696 }
697 itemsize = chophere - item;
698 }
699 break;
a0d0e21e 700 }
a0d0e21e
LW
701
702 case FF_SPACE:
703 arg = fieldsize - itemsize;
704 if (arg) {
705 fieldsize -= arg;
706 while (arg-- > 0)
707 *t++ = ' ';
708 }
709 break;
710
711 case FF_HALFSPACE:
712 arg = fieldsize - itemsize;
713 if (arg) {
714 arg /= 2;
715 fieldsize -= arg;
716 while (arg-- > 0)
717 *t++ = ' ';
718 }
719 break;
720
721 case FF_ITEM:
8aa7beb6
DM
722 to_copy = itemsize;
723 source = (U8 *)item;
724 trans = 1;
725 if (item_is_utf8) {
726 /* convert to_copy from chars to bytes */
727 U8 *s = source;
728 while (to_copy--)
729 s += UTF8SKIP(s);
730 to_copy = s - source;
a0d0e21e 731 }
8aa7beb6 732 goto append;
a0d0e21e
LW
733
734 case FF_CHOP:
5a34cab7
NC
735 {
736 const char *s = chophere;
737 if (chopspace) {
af68e756 738 while (isSPACE(*s))
5a34cab7
NC
739 s++;
740 }
741 sv_chop(sv,s);
742 SvSETMAGIC(sv);
743 break;
a0d0e21e 744 }
a0d0e21e 745
a1b95068
LW
746 case FF_LINESNGL:
747 chopspace = 0;
a0d0e21e 748 case FF_LINEGLOB:
5a34cab7 749 {
e32383e2 750 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 751 const char *s = item = SvPV_const(sv, len);
7440a75b 752 const char *const send = s + len;
7440a75b 753
f3f2f1a3 754 item_is_utf8 = DO_UTF8(sv);
a1137ee5 755 if (!len)
7440a75b 756 break;
ea60cfe8 757 trans = 0;
0d21cefe 758 gotsome = TRUE;
a1137ee5 759 chophere = s + len;
4ff700b9
DM
760 source = (U8 *) s;
761 to_copy = len;
0d21cefe
DM
762 while (s < send) {
763 if (*s++ == '\n') {
764 if (oneline) {
765 to_copy = s - SvPVX_const(sv) - 1;
766 chophere = s;
767 break;
768 } else {
769 if (s == send) {
0d21cefe
DM
770 to_copy--;
771 } else
772 lines++;
1bd51a4c 773 }
a0d0e21e 774 }
0d21cefe 775 }
a2c0032b
DM
776 }
777
ea60cfe8
DM
778 append:
779 /* append to_copy bytes from source to PL_formstring.
780 * item_is_utf8 implies source is utf8.
781 * if trans, translate certain characters during the copy */
a2c0032b
DM
782 {
783 U8 *tmp = NULL;
26e935cf 784 STRLEN grow = 0;
0325ce87
DM
785
786 SvCUR_set(PL_formtarget,
787 t - SvPVX_const(PL_formtarget));
788
0d21cefe
DM
789 if (targ_is_utf8 && !item_is_utf8) {
790 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM
791 } else {
792 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 793 U8 *s;
0d21cefe 794 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM
795 a problem we have a simple solution for.
796 Don't need get magic. */
0d21cefe 797 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 798 targ_is_utf8 = TRUE;
f5ada144
DM
799 /* re-calculate linemark */
800 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM
801 /* the bytes we initially allocated to append the
802 * whole line may have been gobbled up during the
803 * upgrade, so allocate a whole new line's worth
804 * for safety */
805 grow = linemax;
f5ada144
DM
806 while (linemark--)
807 s += UTF8SKIP(s);
808 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 809 }
0d21cefe
DM
810 /* Easy. They agree. */
811 assert (item_is_utf8 == targ_is_utf8);
812 }
26e935cf
DM
813 if (!trans)
814 /* @* and ^* are the only things that can exceed
815 * the linemax, so grow by the output size, plus
816 * a whole new form's worth in case of any further
817 * output */
818 grow = linemax + to_copy;
819 if (grow)
820 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM
821 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
822
823 Copy(source, t, to_copy, char);
ea60cfe8 824 if (trans) {
8aa7beb6
DM
825 /* blank out ~ or control chars, depending on trans.
826 * works on bytes not chars, so relies on not
827 * matching utf8 continuation bytes */
ea60cfe8
DM
828 U8 *s = (U8*)t;
829 U8 *send = s + to_copy;
830 while (s < send) {
8aa7beb6 831 const int ch = *s;
077dbbf3 832 if (trans == '~' ? (ch == '~') : isCNTRL(ch))
ea60cfe8
DM
833 *s = ' ';
834 s++;
835 }
836 }
837
0d21cefe
DM
838 t += to_copy;
839 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 840 if (tmp)
0d21cefe 841 Safefree(tmp);
5a34cab7 842 break;
a0d0e21e 843 }
a0d0e21e 844
a1b95068
LW
845 case FF_0DECIMAL:
846 arg = *fpc++;
847#if defined(USE_LONG_DOUBLE)
10edeb5d 848 fmt = (const char *)
a701009a 849 ((arg & FORM_NUM_POINT) ?
10edeb5d 850 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 851#else
10edeb5d 852 fmt = (const char *)
a701009a 853 ((arg & FORM_NUM_POINT) ?
10edeb5d 854 "%#0*.*f" : "%0*.*f");
a1b95068
LW
855#endif
856 goto ff_dec;
a0d0e21e 857 case FF_DECIMAL:
a0d0e21e 858 arg = *fpc++;
65202027 859#if defined(USE_LONG_DOUBLE)
10edeb5d 860 fmt = (const char *)
a701009a 861 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 862#else
10edeb5d 863 fmt = (const char *)
a701009a 864 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 865#endif
a1b95068 866 ff_dec:
784707d5
JP
867 /* If the field is marked with ^ and the value is undefined,
868 blank it out. */
a701009a 869 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP
870 arg = fieldsize;
871 while (arg--)
872 *t++ = ' ';
873 break;
874 }
875 gotsome = TRUE;
876 value = SvNV(sv);
a1b95068 877 /* overflow evidence */
bfed75c6 878 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
879 arg = fieldsize;
880 while (arg--)
881 *t++ = '#';
882 break;
883 }
784707d5
JP
884 /* Formats aren't yet marked for locales, so assume "yes". */
885 {
886 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM
887 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
888 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP
889 RESTORE_NUMERIC_STANDARD();
890 }
891 t += fieldsize;
892 break;
a1b95068 893
a0d0e21e
LW
894 case FF_NEWLINE:
895 f++;
f5ada144 896 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW
897 t++;
898 *t++ = '\n';
899 break;
900
901 case FF_BLANK:
902 arg = *fpc++;
903 if (gotsome) {
904 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM
905 fpc--;
906 goto end;
a0d0e21e
LW
907 }
908 }
909 else {
f5ada144 910 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW
911 lines--;
912 }
913 break;
914
915 case FF_MORE:
5a34cab7
NC
916 {
917 const char *s = chophere;
918 const char *send = item + len;
919 if (chopspace) {
af68e756 920 while (isSPACE(*s) && (s < send))
5a34cab7 921 s++;
a0d0e21e 922 }
5a34cab7
NC
923 if (s < send) {
924 char *s1;
925 arg = fieldsize - itemsize;
926 if (arg) {
927 fieldsize -= arg;
928 while (arg-- > 0)
929 *t++ = ' ';
930 }
931 s1 = t - 3;
932 if (strnEQ(s1," ",3)) {
933 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
934 s1--;
935 }
936 *s1++ = '.';
937 *s1++ = '.';
938 *s1++ = '.';
a0d0e21e 939 }
5a34cab7 940 break;
a0d0e21e 941 }
a0d0e21e 942 case FF_END:
11f9eeaf 943 end:
bf2bec63 944 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 945 *t = '\0';
b15aece3 946 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
947 if (targ_is_utf8)
948 SvUTF8_on(PL_formtarget);
3280af22 949 FmLINES(PL_formtarget) += lines;
a0d0e21e 950 SP = ORIGMARK;
11f9eeaf
DM
951 if (fpc[-1] == FF_BLANK)
952 RETURNOP(cLISTOP->op_first);
953 else
954 RETPUSHYES;
a0d0e21e
LW
955 }
956 }
957}
958
959PP(pp_grepstart)
960{
27da23d5 961 dVAR; dSP;
a0d0e21e
LW
962 SV *src;
963
3280af22 964 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 965 (void)POPMARK;
54310121 966 if (GIMME_V == G_SCALAR)
6e449a3a 967 mXPUSHi(0);
533c011a 968 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 969 }
3280af22 970 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC
971 Perl_pp_pushmark(aTHX); /* push dst */
972 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 973 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
974
975 SAVETMPS;
59f00321
RGS
976 if (PL_op->op_private & OPpGREP_LEX)
977 SAVESPTR(PAD_SVl(PL_op->op_targ));
978 else
979 SAVE_DEFSV;
d343c3ef 980 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 981 SAVEVPTR(PL_curpm);
a0d0e21e 982
3280af22 983 src = PL_stack_base[*PL_markstack_ptr];
a0ed822e
FC
984 if (SvPADTMP(src) && !IS_PADGV(src)) {
985 src = PL_stack_base[*PL_markstack_ptr] = sv_mortalcopy(src);
986 PL_tmps_floor++;
987 }
a0d0e21e 988 SvTEMP_off(src);
59f00321
RGS
989 if (PL_op->op_private & OPpGREP_LEX)
990 PAD_SVl(PL_op->op_targ) = src;
991 else
414bf5ae 992 DEFSV_set(src);
a0d0e21e
LW
993
994 PUTBACK;
533c011a 995 if (PL_op->op_type == OP_MAPSTART)
897d3989 996 Perl_pp_pushmark(aTHX); /* push top */
533c011a 997 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
998}
999
a0d0e21e
LW
1000PP(pp_mapwhile)
1001{
27da23d5 1002 dVAR; dSP;
f54cb97a 1003 const I32 gimme = GIMME_V;
544f3153 1004 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1005 I32 count;
1006 I32 shift;
1007 SV** src;
ac27b0f5 1008 SV** dst;
a0d0e21e 1009
544f3153 1010 /* first, move source pointer to the next item in the source list */
3280af22 1011 ++PL_markstack_ptr[-1];
544f3153
GS
1012
1013 /* if there are new items, push them into the destination list */
4c90a460 1014 if (items && gimme != G_VOID) {
544f3153
GS
1015 /* might need to make room back there first */
1016 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1017 /* XXX this implementation is very pessimal because the stack
1018 * is repeatedly extended for every set of items. Is possible
1019 * to do this without any stack extension or copying at all
1020 * by maintaining a separate list over which the map iterates
18ef8bea 1021 * (like foreach does). --gsar */
544f3153
GS
1022
1023 /* everything in the stack after the destination list moves
1024 * towards the end the stack by the amount of room needed */
1025 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1026
1027 /* items to shift up (accounting for the moved source pointer) */
1028 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1029
1030 /* This optimization is by Ben Tilly and it does
1031 * things differently from what Sarathy (gsar)
1032 * is describing. The downside of this optimization is
1033 * that leaves "holes" (uninitialized and hopefully unused areas)
1034 * to the Perl stack, but on the other hand this
1035 * shouldn't be a problem. If Sarathy's idea gets
1036 * implemented, this optimization should become
1037 * irrelevant. --jhi */
1038 if (shift < count)
1039 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1040
924508f0
GS
1041 EXTEND(SP,shift);
1042 src = SP;
1043 dst = (SP += shift);
3280af22
NIS
1044 PL_markstack_ptr[-1] += shift;
1045 *PL_markstack_ptr += shift;
544f3153 1046 while (count--)
a0d0e21e
LW
1047 *dst-- = *src--;
1048 }
544f3153 1049 /* copy the new items down to the destination list */
ac27b0f5 1050 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1051 if (gimme == G_ARRAY) {
b2a2a901
DM
1052 /* add returned items to the collection (making mortal copies
1053 * if necessary), then clear the current temps stack frame
1054 * *except* for those items. We do this splicing the items
1055 * into the start of the tmps frame (so some items may be on
59d53fd6 1056 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM
1057 * them, then freeing the frame. That way, the only tmps that
1058 * accumulate over iterations are the return values for map.
1059 * We have to do to this way so that everything gets correctly
1060 * freed if we die during the map.
1061 */
1062 I32 tmpsbase;
1063 I32 i = items;
1064 /* make space for the slice */
1065 EXTEND_MORTAL(items);
1066 tmpsbase = PL_tmps_floor + 1;
1067 Move(PL_tmps_stack + tmpsbase,
1068 PL_tmps_stack + tmpsbase + items,
1069 PL_tmps_ix - PL_tmps_floor,
1070 SV*);
1071 PL_tmps_ix += items;
1072
1073 while (i-- > 0) {
1074 SV *sv = POPs;
1075 if (!SvTEMP(sv))
1076 sv = sv_mortalcopy(sv);
1077 *dst-- = sv;
1078 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1079 }
1080 /* clear the stack frame except for the items */
1081 PL_tmps_floor += items;
1082 FREETMPS;
1083 /* FREETMPS may have cleared the TEMP flag on some of the items */
1084 i = items;
1085 while (i-- > 0)
1086 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1087 }
bfed75c6 1088 else {
22023b26
TP
1089 /* scalar context: we don't care about which values map returns
1090 * (we use undef here). And so we certainly don't want to do mortal
1091 * copies of meaningless values. */
1092 while (items-- > 0) {
b988aa42 1093 (void)POPs;
22023b26
TP
1094 *dst-- = &PL_sv_undef;
1095 }
b2a2a901 1096 FREETMPS;
22023b26 1097 }
a0d0e21e 1098 }
b2a2a901
DM
1099 else {
1100 FREETMPS;
1101 }
d343c3ef 1102 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1103
1104 /* All done yet? */
3280af22 1105 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1106
1107 (void)POPMARK; /* pop top */
d343c3ef 1108 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1109 (void)POPMARK; /* pop src */
3280af22 1110 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1111 (void)POPMARK; /* pop dst */
3280af22 1112 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1113 if (gimme == G_SCALAR) {
7cc47870
RGS
1114 if (PL_op->op_private & OPpGREP_LEX) {
1115 SV* sv = sv_newmortal();
1116 sv_setiv(sv, items);
1117 PUSHs(sv);
1118 }
1119 else {
1120 dTARGET;
1121 XPUSHi(items);
1122 }
a0d0e21e 1123 }
54310121
PP
1124 else if (gimme == G_ARRAY)
1125 SP += items;
a0d0e21e
LW
1126 RETURN;
1127 }
1128 else {
1129 SV *src;
1130
d343c3ef 1131 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1132 SAVEVPTR(PL_curpm);
a0d0e21e 1133
544f3153 1134 /* set $_ to the new source item */
3280af22 1135 src = PL_stack_base[PL_markstack_ptr[-1]];
a0ed822e 1136 if (SvPADTMP(src) && !IS_PADGV(src)) src = sv_mortalcopy(src);
a0d0e21e 1137 SvTEMP_off(src);
59f00321
RGS
1138 if (PL_op->op_private & OPpGREP_LEX)
1139 PAD_SVl(PL_op->op_targ) = src;
1140 else
414bf5ae 1141 DEFSV_set(src);
a0d0e21e
LW
1142
1143 RETURNOP(cLOGOP->op_other);
1144 }
1145}
1146
a0d0e21e
LW
1147/* Range stuff. */
1148
1149PP(pp_range)
1150{
97aff369 1151 dVAR;
a0d0e21e 1152 if (GIMME == G_ARRAY)
1a67a97c 1153 return NORMAL;
538573f7 1154 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1155 return cLOGOP->op_other;
538573f7 1156 else
1a67a97c 1157 return NORMAL;
a0d0e21e
LW
1158}
1159
1160PP(pp_flip)
1161{
97aff369 1162 dVAR;
39644a26 1163 dSP;
a0d0e21e
LW
1164
1165 if (GIMME == G_ARRAY) {
1a67a97c 1166 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1167 }
1168 else {
1169 dTOPss;
44f8325f 1170 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1171 int flip = 0;
790090df 1172
bfed75c6 1173 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1174 if (GvIO(PL_last_in_gv)) {
1175 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1176 }
1177 else {
fafc274c 1178 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1179 if (gv && GvSV(gv))
1180 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1181 }
bfed75c6
AL
1182 } else {
1183 flip = SvTRUE(sv);
1184 }
1185 if (flip) {
a0d0e21e 1186 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1187 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1188 sv_setiv(targ, 1);
3e3baf6d 1189 SETs(targ);
a0d0e21e
LW
1190 RETURN;
1191 }
1192 else {
1193 sv_setiv(targ, 0);
924508f0 1194 SP--;
1a67a97c 1195 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1196 }
1197 }
76f68e9b 1198 sv_setpvs(TARG, "");
a0d0e21e
LW
1199 SETs(targ);
1200 RETURN;
1201 }
1202}
1203
8e9bbdb9
RGS
1204/* This code tries to decide if "$left .. $right" should use the
1205 magical string increment, or if the range is numeric (we make
1206 an exception for .."0" [#18165]). AMS 20021031. */
1207
1208#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1209 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1210 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1211 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1212 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1213 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1214
a0d0e21e
LW
1215PP(pp_flop)
1216{
97aff369 1217 dVAR; dSP;
a0d0e21e
LW
1218
1219 if (GIMME == G_ARRAY) {
1220 dPOPPOPssrl;
86cb7173 1221
5b295bef
RD
1222 SvGETMAGIC(left);
1223 SvGETMAGIC(right);
a0d0e21e 1224
8e9bbdb9 1225 if (RANGE_IS_NUMERIC(left,right)) {
eb578fdb 1226 IV i, j;
901017d6 1227 IV max;
4d91eccc
FC
1228 if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) ||
1229 (SvOK(right) && (SvIOK(right)
1230 ? SvIsUV(right) && SvUV(right) > IV_MAX
1231 : SvNV_nomg(right) > IV_MAX)))
d470f89e 1232 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
1233 i = SvIV_nomg(left);
1234 max = SvIV_nomg(right);
bbce6d69 1235 if (max >= i) {
c1ab3db2 1236 j = max - i + 1;
9a543cee
FC
1237 if (j > SSize_t_MAX)
1238 Perl_croak(aTHX_ "Out of memory during list extend");
c1ab3db2
AK
1239 EXTEND_MORTAL(j);
1240 EXTEND(SP, j);
bbce6d69 1241 }
c1ab3db2
AK
1242 else
1243 j = 0;
1244 while (j--) {
901017d6 1245 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1246 PUSHs(sv);
1247 }
1248 }
1249 else {
3c323193
FC
1250 STRLEN len, llen;
1251 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1252 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1253
3c323193 1254 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1255 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1256 XPUSHs(sv);
b15aece3 1257 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1258 break;
a0d0e21e
LW
1259 sv = sv_2mortal(newSVsv(sv));
1260 sv_inc(sv);
1261 }
a0d0e21e
LW
1262 }
1263 }
1264 else {
1265 dTOPss;
901017d6 1266 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1267 int flop = 0;
a0d0e21e 1268 sv_inc(targ);
4e3399f9
YST
1269
1270 if (PL_op->op_private & OPpFLIP_LINENUM) {
1271 if (GvIO(PL_last_in_gv)) {
1272 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1273 }
1274 else {
fafc274c 1275 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1276 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1277 }
1278 }
1279 else {
1280 flop = SvTRUE(sv);
1281 }
1282
1283 if (flop) {
a0d0e21e 1284 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1285 sv_catpvs(targ, "E0");
a0d0e21e
LW
1286 }
1287 SETs(targ);
1288 }
1289
1290 RETURN;
1291}
1292
1293/* Control. */
1294
27da23d5 1295static const char * const context_name[] = {
515afda2 1296 "pseudo-block",
f31522f3 1297 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1298 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1299 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1300 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1301 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1302 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1303 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1304 "subroutine",
76753e7f 1305 "format",
515afda2 1306 "eval",
515afda2 1307 "substitution",
515afda2
NC
1308};
1309
76e3520e 1310STATIC I32
5db1eb8d 1311S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1312{
97aff369 1313 dVAR;
eb578fdb 1314 I32 i;
a0d0e21e 1315
7918f24d
NC
1316 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1317
a0d0e21e 1318 for (i = cxstack_ix; i >= 0; i--) {
eb578fdb 1319 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1320 switch (CxTYPE(cx)) {
a0d0e21e 1321 case CXt_SUBST:
a0d0e21e 1322 case CXt_SUB:
7766f137 1323 case CXt_FORMAT:
a0d0e21e 1324 case CXt_EVAL:
0a753a76 1325 case CXt_NULL:
dcbac5bb 1326 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1327 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1328 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1329 if (CxTYPE(cx) == CXt_NULL)
1330 return -1;
1331 break;
c6fdafd0 1332 case CXt_LOOP_LAZYIV:
d01136d6 1333 case CXt_LOOP_LAZYSV:
3b719c58
NC
1334 case CXt_LOOP_FOR:
1335 case CXt_LOOP_PLAIN:
7e8f1eac 1336 {
5db1eb8d
BF
1337 STRLEN cx_label_len = 0;
1338 U32 cx_label_flags = 0;
1339 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1340 if (!cx_label || !(
1341 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1342 (flags & SVf_UTF8)
1343 ? (bytes_cmp_utf8(
1344 (const U8*)cx_label, cx_label_len,
1345 (const U8*)label, len) == 0)
1346 : (bytes_cmp_utf8(
1347 (const U8*)label, len,
1348 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF
1349 : (len == cx_label_len && ((cx_label == label)
1350 || memEQ(cx_label, label, len))) )) {
1c98cc53 1351 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1352 (long)i, cx_label));
a0d0e21e
LW
1353 continue;
1354 }
1c98cc53 1355 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1356 return i;
7e8f1eac 1357 }
a0d0e21e
LW
1358 }
1359 }
1360 return i;
1361}
1362
0d863452
RH
1363
1364
e50aee73 1365I32
864dbfa3 1366Perl_dowantarray(pTHX)
e50aee73 1367{
97aff369 1368 dVAR;
f54cb97a 1369 const I32 gimme = block_gimme();
54310121
PP
1370 return (gimme == G_VOID) ? G_SCALAR : gimme;
1371}
1372
1373I32
864dbfa3 1374Perl_block_gimme(pTHX)
54310121 1375{
97aff369 1376 dVAR;
06b5626a 1377 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1378 if (cxix < 0)
46fc3d4c 1379 return G_VOID;
e50aee73 1380
54310121 1381 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1382 case G_VOID:
1383 return G_VOID;
54310121 1384 case G_SCALAR:
e50aee73 1385 return G_SCALAR;
54310121
PP
1386 case G_ARRAY:
1387 return G_ARRAY;
1388 default:
cea2e8a9 1389 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
118e2215 1390 assert(0); /* NOTREACHED */
d2719217 1391 return 0;
54310121 1392 }
e50aee73
AD
1393}
1394
78f9721b
SM
1395I32
1396Perl_is_lvalue_sub(pTHX)
1397{
97aff369 1398 dVAR;
06b5626a 1399 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1400 assert(cxix >= 0); /* We should only be called from inside subs */
1401
bafb2adc
NC
1402 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1403 return CxLVAL(cxstack + cxix);
78f9721b
SM
1404 else
1405 return 0;
1406}
1407
777d9014
FC
1408/* only used by PUSHSUB */
1409I32
1410Perl_was_lvalue_sub(pTHX)
1411{
1412 dVAR;
1413 const I32 cxix = dopoptosub(cxstack_ix-1);
1414 assert(cxix >= 0); /* We should only be called from inside subs */
1415
1416 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1417 return CxLVAL(cxstack + cxix);
1418 else
1419 return 0;
1420}
1421
76e3520e 1422STATIC I32
901017d6 1423S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1424{
97aff369 1425 dVAR;
a0d0e21e 1426 I32 i;
7918f24d
NC
1427
1428 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1429
a0d0e21e 1430 for (i = startingblock; i >= 0; i--) {
eb578fdb 1431 const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1432 switch (CxTYPE(cx)) {
a0d0e21e
LW
1433 default:
1434 continue;
a0d0e21e 1435 case CXt_SUB:
5fbe8311
DM
1436 /* in sub foo { /(?{...})/ }, foo ends up on the CX stack
1437 * twice; the first for the normal foo() call, and the second
1438 * for a faked up re-entry into the sub to execute the
1439 * code block. Hide this faked entry from the world. */
1440 if (cx->cx_type & CXp_SUB_RE_FAKE)
1441 continue;
1442 case CXt_EVAL:
7766f137 1443 case CXt_FORMAT:
1c98cc53 1444 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW
1445 return i;
1446 }
1447 }
1448 return i;
1449}
1450
76e3520e 1451STATIC I32
cea2e8a9 1452S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1453{
97aff369 1454 dVAR;
a0d0e21e 1455 I32 i;
a0d0e21e 1456 for (i = startingblock; i >= 0; i--) {
eb578fdb 1457 const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1458 switch (CxTYPE(cx)) {
a0d0e21e
LW
1459 default:
1460 continue;
1461 case CXt_EVAL:
1c98cc53 1462 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW
1463 return i;
1464 }
1465 }
1466 return i;
1467}
1468
76e3520e 1469STATIC I32
cea2e8a9 1470S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1471{
97aff369 1472 dVAR;
a0d0e21e 1473 I32 i;
a0d0e21e 1474 for (i = startingblock; i >= 0; i--) {
eb578fdb 1475 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1476 switch (CxTYPE(cx)) {
a0d0e21e 1477 case CXt_SUBST:
a0d0e21e 1478 case CXt_SUB:
7766f137 1479 case CXt_FORMAT:
a0d0e21e 1480 case CXt_EVAL:
0a753a76 1481 case CXt_NULL:
dcbac5bb 1482 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1483 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1484 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1485 if ((CxTYPE(cx)) == CXt_NULL)
1486 return -1;
1487 break;
c6fdafd0 1488 case CXt_LOOP_LAZYIV:
d01136d6 1489 case CXt_LOOP_LAZYSV:
3b719c58
NC
1490 case CXt_LOOP_FOR:
1491 case CXt_LOOP_PLAIN:
1c98cc53 1492 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW
1493 return i;
1494 }
1495 }
1496 return i;
1497}
1498
0d863452
RH
1499STATIC I32
1500S_dopoptogiven(pTHX_ I32 startingblock)
1501{
97aff369 1502 dVAR;
0d863452
RH
1503 I32 i;
1504 for (i = startingblock; i >= 0; i--) {
eb578fdb 1505 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH
1506 switch (CxTYPE(cx)) {
1507 default:
1508 continue;
1509 case CXt_GIVEN:
1c98cc53 1510 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1511 return i;
3b719c58
NC
1512 case CXt_LOOP_PLAIN:
1513 assert(!CxFOREACHDEF(cx));
1514 break;
c6fdafd0 1515 case CXt_LOOP_LAZYIV:
d01136d6 1516 case CXt_LOOP_LAZYSV:
3b719c58 1517 case CXt_LOOP_FOR:
0d863452 1518 if (CxFOREACHDEF(cx)) {
1c98cc53 1519 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH
1520 return i;
1521 }
1522 }
1523 }
1524 return i;
1525}
1526
1527STATIC I32
1528S_dopoptowhen(pTHX_ I32 startingblock)
1529{
97aff369 1530 dVAR;
0d863452
RH
1531 I32 i;
1532 for (i = startingblock; i >= 0; i--) {
eb578fdb 1533 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH
1534 switch (CxTYPE(cx)) {
1535 default:
1536 continue;
1537 case CXt_WHEN:
1c98cc53 1538 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH
1539 return i;
1540 }
1541 }
1542 return i;
1543}
1544
a0d0e21e 1545void
864dbfa3 1546Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1547{
97aff369 1548 dVAR;
a0d0e21e
LW
1549 I32 optype;
1550
f144f1e3
DM
1551 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1552 return;
1553
a0d0e21e 1554 while (cxstack_ix > cxix) {
b0d9ce38 1555 SV *sv;
eb578fdb 1556 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1557 DEBUG_CX("UNWIND"); \
a0d0e21e 1558 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1559 switch (CxTYPE(cx)) {
c90c0ff4
PP
1560 case CXt_SUBST:
1561 POPSUBST(cx);
1562 continue; /* not break */
a0d0e21e 1563 case CXt_SUB:
b0d9ce38
GS
1564 POPSUB(cx,sv);
1565 LEAVESUB(sv);
a0d0e21e
LW
1566 break;
1567 case CXt_EVAL:
1568 POPEVAL(cx);
1569 break;
c6fdafd0 1570 case CXt_LOOP_LAZYIV:
d01136d6 1571 case CXt_LOOP_LAZYSV:
3b719c58
NC
1572 case CXt_LOOP_FOR:
1573 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1574 POPLOOP(cx);
1575 break;
0a753a76 1576 case CXt_NULL:
a0d0e21e 1577 break;
7766f137
GS
1578 case CXt_FORMAT:
1579 POPFORMAT(cx);
1580 break;
a0d0e21e 1581 }
c90c0ff4 1582 cxstack_ix--;
a0d0e21e 1583 }
1b6737cc 1584 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1585}
1586
5a844595
GS
1587void
1588Perl_qerror(pTHX_ SV *err)
1589{
97aff369 1590 dVAR;
7918f24d
NC
1591
1592 PERL_ARGS_ASSERT_QERROR;
1593
6b2fb389
DM
1594 if (PL_in_eval) {
1595 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1596 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1597 SVfARG(err));
6b2fb389
DM
1598 }
1599 else
1600 sv_catsv(ERRSV, err);
1601 }
5a844595
GS
1602 else if (PL_errors)
1603 sv_catsv(PL_errors, err);
1604 else
be2597df 1605 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1606 if (PL_parser)
1607 ++PL_parser->error_count;
5a844595
GS
1608}
1609
bb4c52e0 1610void
c5df3096 1611Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1612{
27da23d5 1613 dVAR;
c5df3096 1614 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1615 U8 in_eval = PL_in_eval;
c5df3096 1616 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1617
96d9b9cd 1618 if (in_eval) {
a0d0e21e 1619 I32 cxix;
a0d0e21e 1620 I32 gimme;
a0d0e21e 1621
22a30693
Z
1622 /*
1623 * Historically, perl used to set ERRSV ($@) early in the die
1624 * process and rely on it not getting clobbered during unwinding.
1625 * That sucked, because it was liable to get clobbered, so the
1626 * setting of ERRSV used to emit the exception from eval{} has
1627 * been moved to much later, after unwinding (see just before
1628 * JMPENV_JUMP below). However, some modules were relying on the
1629 * early setting, by examining $@ during unwinding to use it as
1630 * a flag indicating whether the current unwinding was caused by
1631 * an exception. It was never a reliable flag for that purpose,
1632 * being totally open to false positives even without actual
1633 * clobberage, but was useful enough for production code to
1634 * semantically rely on it.
1635 *
1636 * We'd like to have a proper introspective interface that
1637 * explicitly describes the reason for whatever unwinding
1638 * operations are currently in progress, so that those modules
1639 * work reliably and $@ isn't further overloaded. But we don't
1640 * have one yet. In its absence, as a stopgap measure, ERRSV is
1641 * now *additionally* set here, before unwinding, to serve as the
1642 * (unreliable) flag that it used to.
1643 *
1644 * This behaviour is temporary, and should be removed when a
1645 * proper way to detect exceptional unwinding has been developed.
1646 * As of 2010-12, the authors of modules relying on the hack
1647 * are aware of the issue, because the modules failed on
1648 * perls 5.13.{1..7} which had late setting of $@ without this
1649 * early-setting hack.
1650 */
1651 if (!(in_eval & EVAL_KEEPERR)) {
1652 SvTEMP_off(exceptsv);
1653 sv_setsv(ERRSV, exceptsv);
1654 }
1655
fc941f37
Z
1656 if (in_eval & EVAL_KEEPERR) {
1657 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1658 SVfARG(exceptsv));
1659 }
1660
5a844595
GS
1661 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1662 && PL_curstackinfo->si_prev)
1663 {
bac4b2ad 1664 dounwind(-1);
d3acc0f7 1665 POPSTACK;
bac4b2ad 1666 }
e336de0d 1667
a0d0e21e
LW
1668 if (cxix >= 0) {
1669 I32 optype;
b6494f15 1670 SV *namesv;
eb578fdb 1671 PERL_CONTEXT *cx;
901017d6 1672 SV **newsp;
8f89e5a9
Z
1673 COP *oldcop;
1674 JMPENV *restartjmpenv;
1675 OP *restartop;
a0d0e21e
LW
1676
1677 if (cxix < cxstack_ix)
1678 dounwind(cxix);
1679
3280af22 1680 POPBLOCK(cx,PL_curpm);
6b35e009 1681 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1682 STRLEN msglen;
96d9b9cd 1683 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1684 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1685 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1686 my_exit(1);
1687 }
1688 POPEVAL(cx);
b6494f15 1689 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z
1690 oldcop = cx->blk_oldcop;
1691 restartjmpenv = cx->blk_eval.cur_top_env;
1692 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1693
1694 if (gimme == G_SCALAR)
3280af22
NIS
1695 *++newsp = &PL_sv_undef;
1696 PL_stack_sp = newsp;
a0d0e21e
LW
1697
1698 LEAVE;
748a9306 1699
7fb6a879
GS
1700 /* LEAVE could clobber PL_curcop (see save_re_context())
1701 * XXX it might be better to find a way to avoid messing with
1702 * PL_curcop in save_re_context() instead, but this is a more
1703 * minimal fix --GSAR */
8f89e5a9 1704 PL_curcop = oldcop;
7fb6a879 1705
7a2e2cd6 1706 if (optype == OP_REQUIRE) {
b6494f15 1707 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1708 SvPVX_const(namesv),
c60dbbc3 1709 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1710 &PL_sv_undef, 0);
27e90453
DM
1711 /* note that unlike pp_entereval, pp_require isn't
1712 * supposed to trap errors. So now that we've popped the
1713 * EVAL that pp_require pushed, and processed the error
1714 * message, rethrow the error */
ecad31f0
BF
1715 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1716 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1717 SVs_TEMP)));
7a2e2cd6 1718 }
fc941f37 1719 if (!(in_eval & EVAL_KEEPERR))
96d9b9cd 1720 sv_setsv(ERRSV, exceptsv);
8f89e5a9
Z
1721 PL_restartjmpenv = restartjmpenv;
1722 PL_restartop = restartop;
bb4c52e0 1723 JMPENV_JUMP(3);
118e2215 1724 assert(0); /* NOTREACHED */
a0d0e21e
LW
1725 }
1726 }
87582a92 1727
96d9b9cd 1728 write_to_stderr(exceptsv);
f86702cc 1729 my_failure_exit();
118e2215 1730 assert(0); /* NOTREACHED */
a0d0e21e
LW
1731}
1732
1733PP(pp_xor)
1734{
97aff369 1735 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1736 if (SvTRUE(left) != SvTRUE(right))
1737 RETSETYES;
1738 else
1739 RETSETNO;
1740}
1741
8dff4fc5
BM
1742/*
1743=for apidoc caller_cx
1744
1745The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1746returned C<PERL_CONTEXT> structure can be interrogated to find all the
1747information returned to Perl by C<caller>. Note that XSUBs don't get a
1748stack frame, so C<caller_cx(0, NULL)> will return information for the
1749immediately-surrounding Perl code.
1750
1751This function skips over the automatic calls to C<&DB::sub> made on the
1752behalf of the debugger. If the stack frame requested was a sub called by
1753C<DB::sub>, the return value will be the frame for the call to
1754C<DB::sub>, since that has the correct line number/etc. for the call
1755site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1756frame for the sub call itself.
1757
1758=cut
1759*/
1760
1761const PERL_CONTEXT *
1762Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1763{
eb578fdb
KW
1764 I32 cxix = dopoptosub(cxstack_ix);
1765 const PERL_CONTEXT *cx;
1766 const PERL_CONTEXT *ccstack = cxstack;
901017d6 1767 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1768
a0d0e21e 1769 for (;;) {
2c375eb9
GS
1770 /* we may be in a higher stacklevel, so dig down deeper */
1771 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1772 top_si = top_si->si_prev;
1773 ccstack = top_si->si_cxstack;
1774 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1775 }
8dff4fc5
BM
1776 if (cxix < 0)
1777 return NULL;
f2a7f298 1778 /* caller() should not report the automatic calls to &DB::sub */
1779 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1780 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1781 count++;
1782 if (!count--)
1783 break;
2c375eb9 1784 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1785 }
2c375eb9
GS
1786
1787 cx = &ccstack[cxix];
8dff4fc5
BM
1788 if (dbcxp) *dbcxp = cx;
1789
7766f137 1790 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1791 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1792 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1793 field below is defined for any cx. */
f2a7f298 1794 /* caller() should not report the automatic calls to &DB::sub */
1795 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1796 cx = &ccstack[dbcxix];
06a5b730
PP
1797 }
1798
8dff4fc5
BM
1799 return cx;
1800}
1801
1802PP(pp_caller)
1803{
1804 dVAR;
1805 dSP;
eb578fdb 1806 const PERL_CONTEXT *cx;
8dff4fc5
BM
1807 const PERL_CONTEXT *dbcx;
1808 I32 gimme;
d527ce7c 1809 const HEK *stash_hek;
8dff4fc5 1810 I32 count = 0;
ce0b554b 1811 bool has_arg = MAXARG && TOPs;
25502127 1812 const COP *lcop;
8dff4fc5 1813
ce0b554b
FC
1814 if (MAXARG) {
1815 if (has_arg)
8dff4fc5 1816 count = POPi;
ce0b554b
FC
1817 else (void)POPs;
1818 }
8dff4fc5 1819
ce0b554b 1820 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM
1821 if (!cx) {
1822 if (GIMME != G_ARRAY) {
1823 EXTEND(SP, 1);
1824 RETPUSHUNDEF;
1825 }
1826 RETURN;
1827 }
1828
fb55feef 1829 DEBUG_CX("CALLER");
d0279c7c 1830 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC
1831 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1832 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1833 : NULL;
a0d0e21e 1834 if (GIMME != G_ARRAY) {
27d41816 1835 EXTEND(SP, 1);
d527ce7c 1836 if (!stash_hek)
3280af22 1837 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1838 else {
1839 dTARGET;
d527ce7c 1840 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1841 PUSHs(TARG);
1842 }
a0d0e21e
LW
1843 RETURN;
1844 }
a0d0e21e 1845
b3ca2e83 1846 EXTEND(SP, 11);
27d41816 1847
d527ce7c 1848 if (!stash_hek)
3280af22 1849 PUSHs(&PL_sv_undef);
d527ce7c
BF
1850 else {
1851 dTARGET;
1852 sv_sethek(TARG, stash_hek);
1853 PUSHTARG;
1854 }
6e449a3a 1855 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
25502127
FC
1856 lcop = closest_cop(cx->blk_oldcop, cx->blk_oldcop->op_sibling,
1857 cx->blk_sub.retop, TRUE);
1858 if (!lcop)
1859 lcop = cx->blk_oldcop;
1860 mPUSHi((I32)CopLINE(lcop));
ce0b554b 1861 if (!has_arg)
a0d0e21e 1862 RETURN;
7766f137 1863 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1864 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1865 /* So is ccstack[dbcxix]. */
81ed78b2 1866 if (cvgv && isGV(cvgv)) {
561b68a9 1867 SV * const sv = newSV(0);
c445ea15 1868 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1869 mPUSHs(sv);
bf38a478 1870 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1871 }
1872 else {
84bafc02 1873 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1874 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1875 }
a0d0e21e
LW
1876 }
1877 else {
84bafc02 1878 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1879 mPUSHi(0);
a0d0e21e 1880 }
54310121
PP
1881 gimme = (I32)cx->blk_gimme;
1882 if (gimme == G_VOID)
3280af22 1883 PUSHs(&PL_sv_undef);
54310121 1884 else
98625aca 1885 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1886 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1887 /* eval STRING */
85a64632 1888 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
19bcb54e
FC
1889 PUSHs(newSVpvn_flags(SvPVX(cx->blk_eval.cur_text),
1890 SvCUR(cx->blk_eval.cur_text)-2,
1891 SvUTF8(cx->blk_eval.cur_text)|SVs_TEMP));
3280af22 1892 PUSHs(&PL_sv_no);
0f79a09d 1893 }
811a4de9 1894 /* require */
0f79a09d 1895 else if (cx->blk_eval.old_namesv) {
6e449a3a 1896 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1897 PUSHs(&PL_sv_yes);
06a5b730 1898 }
811a4de9
GS
1899 /* eval BLOCK (try blocks have old_namesv == 0) */
1900 else {
1901 PUSHs(&PL_sv_undef);
1902 PUSHs(&PL_sv_undef);
1903 }
4633a7c4 1904 }
a682de96
GS
1905 else {
1906 PUSHs(&PL_sv_undef);
1907 PUSHs(&PL_sv_undef);
1908 }
bafb2adc 1909 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1910 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1911 {
66a1b24b 1912 AV * const ary = cx->blk_sub.argarray;
c70927a6 1913 const SSize_t off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1914
e1a80902 1915 Perl_init_dbargs(aTHX);
a0d0e21e 1916
3280af22
NIS
1917 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1918 av_extend(PL_dbargs, AvFILLp(ary) + off);
1919 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1920 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1921 }
6e449a3a 1922 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1923 {
1924 SV * mask ;
72dc9ed5 1925 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1926
f07626ad 1927 if (old_warnings == pWARN_NONE)
e476b1b5 1928 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
f07626ad
FC
1929 else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0)
1930 mask = &PL_sv_undef ;
ac27b0f5 1931 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1932 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1933 /* Get the bit mask for $warnings::Bits{all}, because
1934 * it could have been extended by warnings::register */
1935 SV **bits_all;
6673a63c 1936 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1937 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1938 mask = newSVsv(*bits_all);
1939 }
1940 else {
1941 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1942 }
1943 }
e476b1b5 1944 else
72dc9ed5 1945 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1946 mPUSHs(mask);
e476b1b5 1947 }
b3ca2e83 1948
c28fe1ec 1949 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1950 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1951 : &PL_sv_undef);
a0d0e21e
LW
1952 RETURN;
1953}
1954
a0d0e21e
LW
1955PP(pp_reset)
1956{
97aff369 1957 dVAR;
39644a26 1958 dSP;
ca826051
FC
1959 const char * tmps;
1960 STRLEN len = 0;
1961 if (MAXARG < 1 || (!TOPs && !POPs))
1962 tmps = NULL, len = 0;
1963 else
1964 tmps = SvPVx_const(POPs, len);
1965 sv_resetpvn(tmps, len, CopSTASH(PL_curcop));
3280af22 1966 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1967 RETURN;
1968}
1969
dd2155a4
DM
1970/* like pp_nextstate, but used instead when the debugger is active */
1971
a0d0e21e
LW
1972PP(pp_dbstate)
1973{
27da23d5 1974 dVAR;
533c011a 1975 PL_curcop = (COP*)PL_op;
a0d0e21e 1976 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1977 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1978 FREETMPS;
1979
f410a211
NC
1980 PERL_ASYNC_CHECK();
1981
5df8de69
DM
1982 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1983 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1984 {
39644a26 1985 dSP;
eb578fdb 1986 PERL_CONTEXT *cx;
f54cb97a 1987 const I32 gimme = G_ARRAY;
eb160463 1988 U8 hasargs;
0bd48802 1989 GV * const gv = PL_DBgv;
432d4561
JL
1990 CV * cv = NULL;
1991
1992 if (gv && isGV_with_GP(gv))
1993 cv = GvCV(gv);
a0d0e21e 1994
c2cb6f77 1995 if (!cv || (!CvROOT(cv) && !CvXSUB(cv)))
cea2e8a9 1996 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1997
aea4f609
DM
1998 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1999 /* don't do recursive DB::DB call */
a0d0e21e 2000 return NORMAL;
748a9306 2001
a57c6685 2002 ENTER;
4633a7c4
LW
2003 SAVETMPS;
2004
3280af22 2005 SAVEI32(PL_debug);
55497cff 2006 SAVESTACK_POS();
3280af22 2007 PL_debug = 0;
748a9306 2008 hasargs = 0;
924508f0 2009 SPAGAIN;
748a9306 2010
aed2304a 2011 if (CvISXSUB(cv)) {
c127bd3a
SF
2012 PUSHMARK(SP);
2013 (void)(*CvXSUB(cv))(aTHX_ cv);
c127bd3a 2014 FREETMPS;
a57c6685 2015 LEAVE;
c127bd3a
SF
2016 return NORMAL;
2017 }
2018 else {
2019 PUSHBLOCK(cx, CXt_SUB, SP);
2020 PUSHSUB_DB(cx);
2021 cx->blk_sub.retop = PL_op->op_next;
2022 CvDEPTH(cv)++;
9d976ff5
FC
2023 if (CvDEPTH(cv) >= 2) {
2024 PERL_STACK_OVERFLOW_CHECK();
2025 pad_push(CvPADLIST(cv), CvDEPTH(cv));
2026 }
c127bd3a 2027 SAVECOMPPAD();
9d976ff5 2028 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv));
c127bd3a
SF
2029 RETURNOP(CvSTART(cv));
2030 }
a0d0e21e
LW
2031 }
2032 else
2033 return NORMAL;
2034}
2035
b9d76716
VP
2036STATIC SV **
2037S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags)
2038{
9a214eec 2039 bool padtmp = 0;
b9d76716
VP
2040 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2041
9a214eec
DM
2042 if (flags & SVs_PADTMP) {
2043 flags &= ~SVs_PADTMP;
2044 padtmp = 1;
2045 }
b9d76716
VP
2046 if (gimme == G_SCALAR) {
2047 if (MARK < SP)
9a214eec
DM
2048 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2049 ? *SP : sv_mortalcopy(*SP);
b9d76716
VP
2050 else {
2051 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2052 MARK = newsp;
2053 MEXTEND(MARK, 1);
2054 *++MARK = &PL_sv_undef;
2055 return MARK;
2056 }
2057 }
2058 else if (gimme == G_ARRAY) {
2059 /* in case LEAVE wipes old return values */
2060 while (++MARK <= SP) {
9a214eec 2061 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP
2062 *++newsp = *MARK;
2063 else {
2064 *++newsp = sv_mortalcopy(*MARK);
2065 TAINT_NOT; /* Each item is independent */
2066 }
2067 }
2068 /* When this function was called with MARK == newsp, we reach this
2069 * point with SP == newsp. */
2070 }
2071
2072 return newsp;
2073}
2074
2b9a6457
VP
2075PP(pp_enter)
2076{
2077 dVAR; dSP;
eb578fdb 2078 PERL_CONTEXT *cx;
7c2d9d03 2079 I32 gimme = GIMME_V;
2b9a6457
VP
2080
2081 ENTER_with_name("block");
2082
2083 SAVETMPS;
2084 PUSHBLOCK(cx, CXt_BLOCK, SP);
2085
2086 RETURN;
2087}
2088
2089PP(pp_leave)
2090{
2091 dVAR; dSP;
eb578fdb 2092 PERL_CONTEXT *cx;
2b9a6457
VP
2093 SV **newsp;
2094 PMOP *newpm;
2095 I32 gimme;
2096
2097 if (PL_op->op_flags & OPf_SPECIAL) {
2098 cx = &cxstack[cxstack_ix];
2099 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2100 }
2101
2102 POPBLOCK(cx,newpm);
2103
2104 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2105
2106 TAINT_NOT;
f02ea43c 2107 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
2b9a6457
VP
2108 PL_curpm = newpm; /* Don't pop $1 et al till now */
2109
2110 LEAVE_with_name("block");
2111
2112 RETURN;
2113}
2114
a0d0e21e
LW
2115PP(pp_enteriter)
2116{
27da23d5 2117 dVAR; dSP; dMARK;
eb578fdb 2118 PERL_CONTEXT *cx;
f54cb97a 2119 const I32 gimme = GIMME_V;
df530c37 2120 void *itervar; /* location of the iteration variable */
840fe433 2121 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2122
d343c3ef 2123 ENTER_with_name("loop1");
4633a7c4
LW
2124 SAVETMPS;
2125
aafca525
DM
2126 if (PL_op->op_targ) { /* "my" variable */
2127 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2128 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2129 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2130 SVs_PADSTALE, SVs_PADSTALE);
2131 }
09edbca0 2132 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2133#ifdef USE_ITHREADS
df530c37 2134 itervar = PL_comppad;
89e00a7c 2135#else
aafca525 2136 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2137#endif
54b9620d 2138 }
aafca525 2139 else { /* symbol table variable */
159b6efe 2140 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2141 SV** svp = &GvSV(gv);
2142 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2143 *svp = newSV(0);
df530c37 2144 itervar = (void *)gv;
54b9620d 2145 }
4633a7c4 2146
0d863452
RH
2147 if (PL_op->op_private & OPpITER_DEF)
2148 cxtype |= CXp_FOR_DEF;
2149
d343c3ef 2150 ENTER_with_name("loop2");
a0d0e21e 2151
7766f137 2152 PUSHBLOCK(cx, cxtype, SP);
df530c37 2153 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2154 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2155 SV *maybe_ary = POPs;
2156 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2157 dPOPss;
d01136d6 2158 SV * const right = maybe_ary;
984a4bea
RD
2159 SvGETMAGIC(sv);
2160 SvGETMAGIC(right);
4fe3f0fa 2161 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2162 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2163 cx->cx_type |= CXt_LOOP_LAZYIV;
2164 /* Make sure that no-one re-orders cop.h and breaks our
2165 assumptions */
2166 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2167#ifdef NV_PRESERVES_UV
f52e41ad
FC
2168 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2169 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2170 ||
f52e41ad
FC
2171 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2172 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2173#else
f52e41ad 2174 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2175 ||
f52e41ad
FC
2176 ((SvNV_nomg(sv) > 0) &&
2177 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2178 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2179 ||
f52e41ad 2180 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2181 ||
f52e41ad
FC
2182 ((SvNV_nomg(right) > 0) &&
2183 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2184 (SvNV_nomg(right) > (NV)UV_MAX))
2185 ))))
a2309040 2186#endif
076d9a11 2187 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2188 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2189 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2190#ifdef DEBUGGING
2191 /* for correct -Dstv display */
2192 cx->blk_oldsp = sp - PL_stack_base;
2193#endif
89ea2908 2194 }
3f63a782 2195 else {
d01136d6
BS
2196 cx->cx_type &= ~CXTYPEMASK;
2197 cx->cx_type |= CXt_LOOP_LAZYSV;
2198 /* Make sure that no-one re-orders cop.h and breaks our
2199 assumptions */
2200 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2201 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2202 cx->blk_loop.state_u.lazysv.end = right;
2203 SvREFCNT_inc(right);
2204 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2205 /* This will do the upgrade to SVt_PV, and warn if the value
2206 is uninitialised. */
10516c54 2207 (void) SvPV_nolen_const(right);
267cc4a8
NC
2208 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2209 to replace !SvOK() with a pointer to "". */
2210 if (!SvOK(right)) {
2211 SvREFCNT_dec(right);
d01136d6 2212 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2213 }
3f63a782 2214 }
89ea2908 2215 }
d01136d6 2216 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2217 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2218 SvREFCNT_inc(maybe_ary);
2219 cx->blk_loop.state_u.ary.ix =
2220 (PL_op->op_private & OPpITER_REVERSED) ?
2221 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2222 -1;
ef3e5ea9 2223 }
89ea2908 2224 }
d01136d6
BS
2225 else { /* iterating over items on the stack */
2226 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2227 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2228 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2229 }
2230 else {
d01136d6 2231 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2232 }
4633a7c4 2233 }
a0d0e21e
LW
2234
2235 RETURN;
2236}
2237
2238PP(pp_enterloop)
2239{
27da23d5 2240 dVAR; dSP;
eb578fdb 2241 PERL_CONTEXT *cx;
f54cb97a 2242 const I32 gimme = GIMME_V;
a0d0e21e 2243
d343c3ef 2244 ENTER_with_name("loop1");
a0d0e21e 2245 SAVETMPS;
d343c3ef 2246 ENTER_with_name("loop2");
a0d0e21e 2247
3b719c58
NC
2248 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2249 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2250
2251 RETURN;
2252}
2253
2254PP(pp_leaveloop)
2255{
27da23d5 2256 dVAR; dSP;
eb578fdb 2257 PERL_CONTEXT *cx;
a0d0e21e
LW
2258 I32 gimme;
2259 SV **newsp;
2260 PMOP *newpm;
2261 SV **mark;
2262
2263 POPBLOCK(cx,newpm);
3b719c58 2264 assert(CxTYPE_is_LOOP(cx));
4fdae800 2265 mark = newsp;
a8bba7fa 2266 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2267
a1f49e72 2268 TAINT_NOT;
b9d76716 2269 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0);
f86702cc
PP
2270 PUTBACK;
2271
a8bba7fa 2272 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2273 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2274
d343c3ef
GG
2275 LEAVE_with_name("loop2");
2276 LEAVE_with_name("loop1");
a0d0e21e 2277
f86702cc 2278 return NORMAL;
a0d0e21e
LW
2279}
2280
3bdf583b
FC
2281STATIC void
2282S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2283 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2284{
80422e24 2285 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2286 if (gimme == G_SCALAR) {
d25b0d7b
FC
2287 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2288 SV *sv;
001de122 2289 const char *what = NULL;
d25b0d7b
FC
2290 if (MARK < SP) {
2291 assert(MARK+1 == SP);
2292 if ((SvPADTMP(TOPs) ||
2293 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2294 == SVf_READONLY
2295 ) &&
2296 !SvSMAGICAL(TOPs)) {
001de122 2297 what =
d25b0d7b 2298 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2299 : "a readonly value" : "a temporary";
d25b0d7b 2300 }
001de122 2301 else goto copy_sv;
d25b0d7b
FC
2302 }
2303 else {
2304 /* sub:lvalue{} will take us here. */
001de122 2305 what = "undef";
d25b0d7b 2306 }
001de122
FC
2307 LEAVE;
2308 cxstack_ix--;
2309 POPSUB(cx,sv);
2310 PL_curpm = newpm;
2311 LEAVESUB(sv);
2312 Perl_croak(aTHX_
2313 "Can't return %s from lvalue subroutine", what
2314 );
d25b0d7b 2315 }
93905212 2316 if (MARK < SP) {
a5ad7a5a 2317 copy_sv:
3bdf583b 2318 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2319 if (!SvPADTMP(*SP)) {
3bdf583b
FC
2320 *++newsp = SvREFCNT_inc(*SP);
2321 FREETMPS;
2322 sv_2mortal(*newsp);
5811c07e
FC
2323 }
2324 else {
2325 /* FREETMPS could clobber it */
2326 SV *sv = SvREFCNT_inc(*SP);
2327 FREETMPS;
2328 *++newsp = sv_mortalcopy(sv);
2329 SvREFCNT_dec(sv);
2330 }
3bdf583b
FC
2331 }
2332 else
e08be60b 2333 *++newsp =
5811c07e
FC
2334 SvPADTMP(*SP)
2335 ? sv_mortalcopy(*SP)
2336 : !SvTEMP(*SP)
e08be60b
FC
2337 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2338 : *SP;
3bdf583b 2339 }
0d235c77
FC
2340 else {
2341 EXTEND(newsp,1);
3bdf583b 2342 *++newsp = &PL_sv_undef;
0d235c77 2343 }
0e9700df 2344 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2345 SvGETMAGIC(TOPs);
2346 if (!SvOK(TOPs)) {
0e9700df 2347 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2348 }
2349 }
3bdf583b
FC
2350 }
2351 else if (gimme == G_ARRAY) {
0e9700df 2352 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2353 if (ref || !CxLVAL(cx))
e08be60b
FC
2354 while (++MARK <= SP)
2355 *++newsp =
5811c07e 2356 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2357 ? sv_mortalcopy(*MARK)
5811c07e
FC
2358 : SvTEMP(*MARK)
2359 ? *MARK
80422e24 2360 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2361 else while (++MARK <= SP) {
d25b0d7b
FC
2362 if (*MARK != &PL_sv_undef
2363 && (SvPADTMP(*MARK)
2364 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2365 == SVf_READONLY
2366 )
2367 ) {
2368 SV *sv;
2369 /* Might be flattened array after $#array = */
2370 PUTBACK;
2371 LEAVE;
2372 cxstack_ix--;
2373 POPSUB(cx,sv);
2374 PL_curpm = newpm;
2375 LEAVESUB(sv);
ae917476 2376 /* diag_listed_as: Can't return %s from lvalue subroutine */
d25b0d7b
FC
2377 Perl_croak(aTHX_
2378 "Can't return a %s from lvalue subroutine",
2379 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2380 }
2381 else
4bee03f8
FC
2382 *++newsp =
2383 SvTEMP(*MARK)
2384 ? *MARK
2385 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2386 }
2387 }
2388 PL_stack_sp = newsp;
2389}
2390
a0d0e21e
LW
2391PP(pp_return)
2392{
27da23d5 2393 dVAR; dSP; dMARK;
eb578fdb 2394 PERL_CONTEXT *cx;
f86702cc 2395 bool popsub2 = FALSE;
b45de488 2396 bool clear_errsv = FALSE;
fa1e92c4 2397 bool lval = FALSE;
a0d0e21e
LW
2398 I32 gimme;
2399 SV **newsp;
2400 PMOP *newpm;
2401 I32 optype = 0;
b6494f15 2402 SV *namesv;
b0d9ce38 2403 SV *sv;
b263a1ad 2404 OP *retop = NULL;
a0d0e21e 2405
0bd48802
AL
2406 const I32 cxix = dopoptosub(cxstack_ix);
2407
9850bf21
RH
2408 if (cxix < 0) {
2409 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2410 * sort block, which is a CXt_NULL
2411 * not a CXt_SUB */
2412 dounwind(0);
d7507f74
RH
2413 PL_stack_base[1] = *PL_stack_sp;
2414 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2415 return 0;
2416 }
9850bf21
RH
2417 else
2418 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2419 }
a0d0e21e
LW
2420 if (cxix < cxstack_ix)
2421 dounwind(cxix);
2422
d7507f74
RH
2423 if (CxMULTICALL(&cxstack[cxix])) {
2424 gimme = cxstack[cxix].blk_gimme;
2425 if (gimme == G_VOID)
2426 PL_stack_sp = PL_stack_base;
2427 else if (gimme == G_SCALAR) {
2428 PL_stack_base[1] = *PL_stack_sp;
2429 PL_stack_sp = PL_stack_base + 1;
2430 }
9850bf21 2431 return 0;
d7507f74 2432 }
9850bf21 2433
a0d0e21e 2434 POPBLOCK(cx,newpm);
6b35e009 2435 switch (CxTYPE(cx)) {
a0d0e21e 2436 case CXt_SUB:
f86702cc 2437 popsub2 = TRUE;
fa1e92c4 2438 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2439 retop = cx->blk_sub.retop;
5dd42e15 2440 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2441 break;
2442 case CXt_EVAL:
b45de488
GS
2443 if (!(PL_in_eval & EVAL_KEEPERR))
2444 clear_errsv = TRUE;
a0d0e21e 2445 POPEVAL(cx);
b6494f15 2446 namesv = cx->blk_eval.old_namesv;
f39bc417 2447 retop = cx->blk_eval.retop;
1d76a5c3
GS
2448 if (CxTRYBLOCK(cx))
2449 break;
748a9306
LW
2450 if (optype == OP_REQUIRE &&
2451 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2452 {
54310121 2453 /* Unassume the success we assumed earlier. */
b6494f15 2454 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2455 SvPVX_const(namesv),
c60dbbc3 2456 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP
2457 G_DISCARD);
2458 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2459 }
a0d0e21e 2460 break;
7766f137 2461 case CXt_FORMAT:
f39bc417 2462 retop = cx->blk_sub.retop;
25375124 2463 POPFORMAT(cx);
7766f137 2464 break;
a0d0e21e 2465 default:
5637ef5b 2466 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2467 }
2468
a1f49e72 2469 TAINT_NOT;
d25b0d7b 2470 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC
2471 else {
2472 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2473 if (MARK < SP) {
2474 if (popsub2) {
a8bba7fa 2475 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
6f48390a
FC
2476 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
2477 && !SvMAGICAL(TOPs)) {
a29cdaf0
IZ
2478 *++newsp = SvREFCNT_inc(*SP);
2479 FREETMPS;
2480 sv_2mortal(*newsp);
959e3673
GS
2481 }
2482 else {
2483 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2484 FREETMPS;
959e3673
GS
2485 *++newsp = sv_mortalcopy(sv);
2486 SvREFCNT_dec(sv);
a29cdaf0 2487 }
959e3673 2488 }
6f48390a
FC
2489 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
2490 && !SvMAGICAL(*SP)) {
767eda44 2491 *++newsp = *SP;
767eda44 2492 }
959e3673 2493 else
767eda44 2494 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2495 }
2496 else
a29cdaf0 2497 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2498 }
2499 else
3280af22 2500 *++newsp = &PL_sv_undef;
3bdf583b
FC
2501 }
2502 else if (gimme == G_ARRAY) {
a1f49e72 2503 while (++MARK <= SP) {
3ed94dc0 2504 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
6f48390a 2505 && !SvGMAGICAL(*MARK)
f86702cc 2506 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2507 TAINT_NOT; /* Each item is independent */
2508 }
3bdf583b
FC
2509 }
2510 PL_stack_sp = newsp;
a0d0e21e 2511 }
a0d0e21e 2512
5dd42e15 2513 LEAVE;
f86702cc
PP
2514 /* Stack values are safe: */
2515 if (popsub2) {
5dd42e15 2516 cxstack_ix--;
b0d9ce38 2517 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2518 }
b0d9ce38 2519 else
c445ea15 2520 sv = NULL;
3280af22 2521 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2522
b0d9ce38 2523 LEAVESUB(sv);
8433848b 2524 if (clear_errsv) {
ab69dbc2 2525 CLEAR_ERRSV();
8433848b 2526 }
f39bc417 2527 return retop;
a0d0e21e
LW
2528}
2529
4f443c3d
FC
2530/* This duplicates parts of pp_leavesub, so that it can share code with
2531 * pp_return */
2532PP(pp_leavesublv)
2533{
2534 dVAR; dSP;
4f443c3d
FC
2535 SV **newsp;
2536 PMOP *newpm;
2537 I32 gimme;
eb578fdb 2538 PERL_CONTEXT *cx;
4f443c3d
FC
2539 SV *sv;
2540
2541 if (CxMULTICALL(&cxstack[cxstack_ix]))
2542 return 0;
2543
2544 POPBLOCK(cx,newpm);
2545 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC
2546
2547 TAINT_NOT;
2548
0d235c77 2549 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC
2550
2551 LEAVE;
4f443c3d 2552 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
25375124 2553 cxstack_ix--;
4f443c3d
FC
2554 PL_curpm = newpm; /* ... and pop $1 et al */
2555
2556 LEAVESUB(sv);
2557 return cx->blk_sub.retop;
2558}
2559
1f039d60
FC
2560static I32
2561S_unwind_loop(pTHX_ const char * const opname)
a0d0e21e 2562{
1f039d60 2563 dVAR;
a0d0e21e 2564 I32 cxix;
1f039d60
FC
2565 if (PL_op->op_flags & OPf_SPECIAL) {
2566 cxix = dopoptoloop(cxstack_ix);
2567 if (cxix < 0)
2568 /* diag_listed_as: Can't "last" outside a loop block */
2569 Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
2570 }
2571 else {
2572 dSP;
2573 STRLEN label_len;
2574 const char * const label =
2575 PL_op->op_flags & OPf_STACKED
2576 ? SvPV(TOPs,label_len)
2577 : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
2578 const U32 label_flags =
2579 PL_op->op_flags & OPf_STACKED
2580 ? SvUTF8(POPs)
2581 : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2582 PUTBACK;
2583 cxix = dopoptolabel(label, label_len, label_flags);
2584 if (cxix < 0)
2585 /* diag_listed_as: Label not found for "last %s" */
2586 Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
2587 opname,
2588 SVfARG(PL_op->op_flags & OPf_STACKED
2589 && !SvGMAGICAL(TOPp1s)
2590 ? TOPp1s
2591 : newSVpvn_flags(label,
2592 label_len,
2593 label_flags | SVs_TEMP)));
2594 }
2595 if (cxix < cxstack_ix)
2596 dounwind(cxix);
2597 return cxix;
2598}
2599
2600PP(pp_last)
2601{
2602 dVAR;
eb578fdb 2603 PERL_CONTEXT *cx;
f86702cc 2604 I32 pop2 = 0;
a0d0e21e 2605 I32 gimme;
8772537c 2606 I32 optype;
b263a1ad 2607 OP *nextop = NULL;
a0d0e21e
LW
2608 SV **newsp;
2609 PMOP *newpm;
c445ea15 2610 SV *sv = NULL;
9d4ba2ae 2611
1f039d60 2612 S_unwind_loop(aTHX_ "last");
a0d0e21e
LW
2613
2614 POPBLOCK(cx,newpm);
5dd42e15 2615 cxstack_ix++; /* temporarily protect top context */
6b35e009 2616 switch (CxTYPE(cx)) {
c6fdafd0 2617 case CXt_LOOP_LAZYIV:
d01136d6 2618 case CXt_LOOP_LAZYSV:
3b719c58
NC
2619 case CXt_LOOP_FOR:
2620 case CXt_LOOP_PLAIN:
2621 pop2 = CxTYPE(cx);
a8bba7fa 2622 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2623 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2624 break;
f86702cc 2625 case CXt_SUB:
f86702cc 2626 pop2 = CXt_SUB;
f39bc417 2627 nextop = cx->blk_sub.retop;
a0d0e21e 2628 break;
f86702cc
PP
2629 case CXt_EVAL:
2630 POPEVAL(cx);
f39bc417 2631 nextop = cx->blk_eval.retop;
a0d0e21e 2632 break;
7766f137
GS
2633 case CXt_FORMAT:
2634 POPFORMAT(cx);
f39bc417 2635 nextop = cx->blk_sub.retop;
7766f137 2636 break;
a0d0e21e 2637 default:
5637ef5b 2638 DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2639 }
2640
a1f49e72 2641 TAINT_NOT;
0c0c317c 2642 PL_stack_sp = newsp;
f86702cc 2643
5dd42e15
DM
2644 LEAVE;
2645 cxstack_ix--;
f86702cc
PP
2646 /* Stack values are safe: */
2647 switch (pop2) {
c6fdafd0 2648 case CXt_LOOP_LAZYIV:
3b719c58 2649 case CXt_LOOP_PLAIN:
d01136d6 2650 case CXt_LOOP_LAZYSV:
3b719c58 2651 case CXt_LOOP_FOR:
a8bba7fa 2652 POPLOOP(cx); /* release loop vars ... */
4fdae800 2653 LEAVE;
f86702cc
PP
2654 break;
2655 case CXt_SUB:
b0d9ce38 2656 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2657 break;
a0d0e21e 2658 }
3280af22 2659 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2660
b0d9ce38 2661 LEAVESUB(sv);
9d4ba2ae
AL
2662 PERL_UNUSED_VAR(optype);
2663 PERL_UNUSED_VAR(gimme);
f86702cc 2664 return nextop;
a0d0e21e
LW
2665}
2666
2667PP(pp_next)
2668{
27da23d5 2669 dVAR;
eb578fdb 2670 PERL_CONTEXT *cx;
1f039d60 2671 const I32 inner = PL_scopestack_ix;
a0d0e21e 2672
1f039d60 2673 S_unwind_loop(aTHX_ "next");
a0d0e21e 2674
85538317
GS
2675 /* clear off anything above the scope we're re-entering, but
2676 * save the rest until after a possible continue block */
1ba6ee2b 2677 TOPBLOCK(cx);
85538317
GS
2678 if (PL_scopestack_ix < inner)
2679 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2680 PL_curcop = cx->blk_oldcop;
47c9d59f 2681 PERL_ASYNC_CHECK();
d57ce4df 2682 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2683}
2684
2685PP(pp_redo)
2686{
27da23d5 2687 dVAR;
1f039d60 2688 const I32 cxix = S_unwind_loop(aTHX_ "redo");
eb578fdb 2689 PERL_CONTEXT *cx;
a0d0e21e 2690 I32 oldsave;
1f039d60 2691 OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a0d0e21e 2692
a034e688
DM
2693 if (redo_op->op_type == OP_ENTER) {
2694 /* pop one less context to avoid $x being freed in while (my $x..) */
2695 cxstack_ix++;
2696 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2697 redo_op = redo_op->op_next;
2698 }
2699
a0d0e21e 2700 TOPBLOCK(cx);
3280af22 2701 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2702 LEAVE_SCOPE(oldsave);
936c78b5 2703 FREETMPS;
3a1b2b9e 2704 PL_curcop = cx->blk_oldcop;
47c9d59f 2705 PERL_ASYNC_CHECK();
a034e688 2706 return redo_op;
a0d0e21e
LW
2707}
2708
0824fdcb 2709STATIC OP *
5db1eb8d 2710S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2711{
97aff369 2712 dVAR;
a0d0e21e 2713 OP **ops = opstack;
a1894d81 2714 static const char* const too_deep = "Target of goto is too deeply nested";
a0d0e21e 2715
7918f24d
NC
2716 PERL_ARGS_ASSERT_DOFINDLABEL;
2717
fc36a67e 2718 if (ops >= oplimit)
0157ef98 2719 Perl_croak(aTHX_ "%s", too_deep);
11343788
MB
2720 if (o->op_type == OP_LEAVE ||
2721 o->op_type == OP_SCOPE ||
2722 o->op_type == OP_LEAVELOOP ||
33d34e4c 2723 o->op_type == OP_LEAVESUB ||
11343788 2724 o->op_type == OP_LEAVETRY)
fc36a67e 2725 {
5dc0d613 2726 *ops++ = cUNOPo->op_first;
fc36a67e 2727 if (ops >= oplimit)
0157ef98 2728 Perl_croak(aTHX_ "%s", too_deep);
fc36a67e 2729 }
c4aa4e48 2730 *ops = 0;
11343788 2731 if (o->op_flags & OPf_KIDS) {
aec46f14 2732 OP *kid;
a0d0e21e 2733 /* First try all the kids at this level, since that's likeliest. */
11343788 2734 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac 2735 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF
2736 STRLEN kid_label_len;
2737 U32 kid_label_flags;
2738 const char *kid_label = CopLABEL_len_flags(kCOP,
2739 &kid_label_len, &kid_label_flags);
2740 if (kid_label && (
2741 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2742 (flags & SVf_UTF8)
2743 ? (bytes_cmp_utf8(
2744 (const U8*)kid_label, kid_label_len,
2745 (const U8*)label, len) == 0)
2746 : (bytes_cmp_utf8(
2747 (const U8*)label, len,
2748 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF
2749 : ( len == kid_label_len && ((kid_label == label)
2750 || memEQ(kid_label, label, len)))))
7e8f1eac
AD
2751 return kid;
2752 }
a0d0e21e 2753 }
11343788 2754 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2755 if (kid == PL_lastgotoprobe)
a0d0e21e 2756 continue;
ed8d0fe2
SM
2757 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2758 if (ops == opstack)
2759 *ops++ = kid;
2760 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2761 ops[-1]->op_type == OP_DBSTATE)
2762 ops[-1] = kid;
2763 else
2764 *ops++ = kid;
2765 }
5db1eb8d 2766 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2767 return o;
a0d0e21e
LW
2768 }
2769 }
c4aa4e48 2770 *ops = 0;
a0d0e21e
LW
2771 return 0;
2772}
2773
7d1d69cb 2774PP(pp_goto) /* also pp_dump */
a0d0e21e 2775{
27da23d5 2776 dVAR; dSP;
cbbf8932 2777 OP *retop = NULL;
a0d0e21e 2778 I32 ix;
eb578fdb 2779 PERL_CONTEXT *cx;
fc36a67e
PP
2780#define GOTO_DEPTH 64
2781 OP *enterops[GOTO_DEPTH];
cbbf8932 2782 const char *label = NULL;
5db1eb8d
BF
2783 STRLEN label_len = 0;
2784 U32 label_flags = 0;
bfed75c6 2785 const bool do_dump = (PL_op->op_type == OP_DUMP);
a1894d81 2786 static const char* const must_have_label = "goto must have label";
a0d0e21e 2787
533c011a 2788 if (PL_op->op_flags & OPf_STACKED) {
7d1d69cb
DM
2789 /* goto EXPR or goto &foo */
2790
9d4ba2ae 2791 SV * const sv = POPs;
55b37f1c 2792 SvGETMAGIC(sv);
a0d0e21e
LW
2793
2794 /* This egregious kludge implements goto &subroutine */
2795 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2796 I32 cxix;
eb578fdb 2797 PERL_CONTEXT *cx;
ea726b52 2798 CV *cv = MUTABLE_CV(SvRV(sv));
049bd5ff 2799 AV *arg = GvAV(PL_defgv);
a0d0e21e
LW
2800 I32 oldsave;
2801
e8f7dd13 2802 retry:
4aa0a1f7 2803 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2804 const GV * const gv = CvGV(cv);
e8f7dd13 2805 if (gv) {
7fc63493 2806 GV *autogv;
e8f7dd13
GS
2807 SV *tmpstr;
2808 /* autoloaded stub? */
2809 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2810 goto retry;
c271df94
BF
2811 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2812 GvNAMELEN(gv),
2813 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2814 if (autogv && (cv = GvCV(autogv)))
2815 goto retry;
2816 tmpstr = sv_newmortal();
c445ea15 2817 gv_efullname3(tmpstr, gv, NULL);
be2597df 2818 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2819 }
cea2e8a9 2820 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2821 }
2822
a0d0e21e 2823 /* First do some returnish stuff. */
b37c2d43 2824 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2825 FREETMPS;
a0d0e21e 2826 cxix = dopoptosub(cxstack_ix);
8da3792e
SM
2827 if (cxix < cxstack_ix) {
2828 if (cxix < 0) {
2829 SvREFCNT_dec(cv);
2830 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2831 }
a0d0e21e 2832 dounwind(cxix);
8da3792e 2833 }
a0d0e21e 2834 TOPBLOCK(cx);
2d43a17f 2835 SPAGAIN;
564abe23 2836 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2837 if (CxTYPE(cx) == CXt_EVAL) {
110af908 2838 SvREFCNT_dec(cv);
c74ace89 2839 if (CxREALEVAL(cx))
00455a92 2840 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM
2841 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2842 else
00455a92 2843 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2844 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2845 }
9850bf21 2846 else if (CxMULTICALL(cx))
110af908
FC
2847 {
2848 SvREFCNT_dec(cv);
9850bf21 2849 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
110af908 2850 }
bafb2adc 2851 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
a0d0e21e 2852 AV* av = cx->blk_sub.argarray;
bfed75c6 2853
049bd5ff
FC
2854 /* abandon the original @_ if it got reified or if it is
2855 the same as the current @_ */
2856 if (AvREAL(av) || av == arg) {
b1464ded 2857 SvREFCNT_dec(av);
d8b46c1b 2858 av = newAV();
11ca45c0 2859 AvREIFY_only(av);
ad64d0ec 2860 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2861 }
049bd5ff 2862 else CLEAR_ARGARRAY(av);
a0d0e21e 2863 }
049bd5ff
FC
2864 /* We donate this refcount later to the callee’s pad. */
2865 SvREFCNT_inc_simple_void(arg);
6b35e009 2866 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2867 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2868 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2869 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2870 LEAVE_SCOPE(oldsave);
2871
1d59c038
FC
2872 /* A destructor called during LEAVE_SCOPE could have undefined
2873 * our precious cv. See bug #99850. */
2874 if (!CvROOT(cv) && !CvXSUB(cv)) {
2875 const GV * const gv = CvGV(cv);
049bd5ff 2876 SvREFCNT_dec(arg);
1d59c038
FC
2877 if (gv) {
2878 SV * const tmpstr = sv_newmortal();
2879 gv_efullname3(tmpstr, gv, NULL);
2880 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2881 SVfARG(tmpstr));
2882 }
2883 DIE(aTHX_ "Goto undefined subroutine");
2884 }
2885
a0d0e21e
LW
2886 /* Now do some callish stuff. */
2887 SAVETMPS;
5023d17a 2888 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2889 if (CvISXSUB(cv)) {
b37c2d43 2890 OP* const retop = cx->blk_sub.retop;
cb65b687
DM
2891 SV **newsp;
2892 I32 gimme;
ad39f3a2 2893 const SSize_t items = arg ? AvFILL(arg) + 1 : 0;
cd313eb4 2894 const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0;
049bd5ff
FC
2895 SV** mark;
2896
cb65b687
DM
2897 PERL_UNUSED_VAR(newsp);
2898 PERL_UNUSED_VAR(gimme);
2899
049bd5ff 2900 /* put GvAV(defgv) back onto stack */
8c9d3376
FC
2901 if (items) {
2902 EXTEND(SP, items+1); /* @_ could have been extended. */
8c9d3376 2903 }
049bd5ff 2904 mark = SP;
ad39f3a2 2905 if (items) {
de935cc9 2906 SSize_t index;
ad39f3a2 2907 bool r = cBOOL(AvREAL(arg));
b1464ded 2908 for (index=0; index<items; index++)
ad39f3a2
FC
2909 {
2910 SV *sv;
2911 if (m) {
2912 SV ** const svp = av_fetch(arg, index, 0);
2913 sv = svp ? *svp : NULL;
dd2a7f90 2914 }
ad39f3a2
FC
2915 else sv = AvARRAY(arg)[index];
2916 SP[index+1] = sv
2917 ? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv
2918 : sv_2mortal(newSVavdefelem(arg, index, 1));
2919 }
049bd5ff 2920 }
ad39f3a2 2921 SP += items;
049bd5ff
FC
2922 SvREFCNT_dec(arg);
2923 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
2924 /* Restore old @_ */
2925 arg = GvAV(PL_defgv);
2926 GvAV(PL_defgv) = cx->blk_sub.savearray;
2927 SvREFCNT_dec(arg);
b1464ded 2928 }
1fa4e549 2929
b37c2d43
AL
2930 /* XS subs don't have a CxSUB, so pop it */
2931 POPBLOCK(cx, PL_curpm);
2932 /* Push a mark for the start of arglist */
2933 PUSHMARK(mark);
2934 PUTBACK;
2935 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2936 LEAVE;
47c9d59f 2937 PERL_ASYNC_CHECK();
5eff7df7 2938 return retop;
a0d0e21e
LW
2939 }
2940 else {
b70d5558 2941 PADLIST * const padlist = CvPADLIST(cv);
a0d0e21e 2942 cx->blk_sub.cv = cv;
1a5b3db4 2943 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2944
a0d0e21e
LW
2945 CvDEPTH(cv)++;
2946 if (CvDEPTH(cv) < 2)
74c765eb 2947 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2948 else {
2b9dff67 2949 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2950 sub_crush_depth(cv);
26019298 2951 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2952 }
426a09cd 2953 PL_curcop = cx->blk_oldcop;
fd617465
DM
2954 SAVECOMPPAD();
2955 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2956 if (CxHASARGS(cx))
6d4ff0d2 2957 {
dd2155a4 2958 CX_CURPAD_SAVE(cx->blk_sub);
a0d0e21e 2959
049bd5ff
FC
2960 /* cx->blk_sub.argarray has no reference count, so we
2961 need something to hang on to our argument array so
2962 that cx->blk_sub.argarray does not end up pointing
2963 to freed memory as the result of undef *_. So put
2964 it in the callee’s pad, donating our refer-
2965 ence count. */
2966 SvREFCNT_dec(PAD_SVl(0));
2967 PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
2968
2969 /* GvAV(PL_defgv) might have been modified on scope
2970 exit, so restore it. */
2971 if (arg != GvAV(PL_defgv)) {
2972 AV * const av = GvAV(PL_defgv);
2973 GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg);
2974 SvREFCNT_dec(av);
a0d0e21e
LW
2975 }
2976 }
049bd5ff 2977 else SvREFCNT_dec(arg);
491527d0 2978 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2979 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2980 if (PERLDB_GOTO) {
b96d8cd9 2981 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2982 if (gotocv) {
2983 PUSHMARK( PL_stack_sp );
ad64d0ec 2984 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2985 PL_stack_sp--;
2986 }
491527d0 2987 }
1ce6579f 2988 }
47c9d59f 2989 PERL_ASYNC_CHECK();
a0d0e21e
LW
2990 RETURNOP(CvSTART(cv));
2991 }
2992 }
1614b0e3 2993 else {
7d1d69cb 2994 /* goto EXPR */
55b37f1c 2995 label = SvPV_nomg_const(sv, label_len);
5db1eb8d 2996 label_flags = SvUTF8(sv);
1614b0e3 2997 }
a0d0e21e 2998 }
2fc690dc 2999 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
7d1d69cb 3000 /* goto LABEL or dump LABEL */
5db1eb8d
BF
3001 label = cPVOP->op_pv;
3002 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
3003 label_len = strlen(label);
3004 }
0157ef98 3005 if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label);
a0d0e21e 3006
f410a211
NC
3007 PERL_ASYNC_CHECK();
3008
3532f34a 3009 if (label_len) {
cbbf8932 3010 OP *gotoprobe = NULL;
3b2447bc 3011 bool leaving_eval = FALSE;
33d34e4c 3012 bool in_block = FALSE;
cbbf8932 3013 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
3014
3015 /* find label */
3016
d4c19fe8 3017 PL_lastgotoprobe = NULL;
a0d0e21e
LW
3018 *enterops = 0;
3019 for (ix = cxstack_ix; ix >= 0; ix--) {
3020 cx = &cxstack[ix];
6b35e009 3021 switch (CxTYPE(cx)) {
a0d0e21e 3022 case CXt_EVAL:
3b2447bc 3023 leaving_eval = TRUE;
971ecbe6 3024 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
3025 gotoprobe = (last_eval_cx ?
3026 last_eval_cx->blk_eval.old_eval_root :
3027 PL_eval_root);
3028 last_eval_cx = cx;
9c5794fe
RH
3029 break;
3030 }
3031 /* else fall through */
c6fdafd0 3032 case CXt_LOOP_LAZYIV:
d01136d6 3033 case CXt_LOOP_LAZYSV:
3b719c58
NC
3034 case CXt_LOOP_FOR:
3035 case CXt_LOOP_PLAIN:
bb5aedc1
VP
3036 case CXt_GIVEN:
3037 case CXt_WHEN:
a0d0e21e
LW
3038 gotoprobe = cx->blk_oldcop->op_sibling;
3039 break;
3040 case CXt_SUBST:
3041 continue;
3042 case CXt_BLOCK:
33d34e4c 3043 if (ix) {
a0d0e21e 3044 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
3045 in_block = TRUE;
3046 } else
3280af22 3047 gotoprobe = PL_main_root;
a0d0e21e 3048 break;
b3933176 3049 case CXt_SUB:
9850bf21 3050 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
3051 gotoprobe = CvROOT(cx->blk_sub.cv);
3052 break;
3053 }
3054 /* FALL THROUGH */
7766f137 3055 case CXt_FORMAT:
0a753a76 3056 case CXt_NULL:
a651a37d 3057 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
3058 default:
3059 if (ix)
5637ef5b
NC
3060 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
3061 CxTYPE(cx), (long) ix);
3280af22 3062 gotoprobe = PL_main_root;
a0d0e21e
LW
3063 break;
3064 }
2b597662 3065 if (gotoprobe) {
5db1eb8d 3066 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS
3067 enterops, enterops + GOTO_DEPTH);
3068 if (retop)
3069 break;
eae48c89
Z
3070 if (gotoprobe->op_sibling &&
3071 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3072 gotoprobe->op_sibling->op_sibling) {
3073 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
5db1eb8d
BF
3074 label, label_len, label_flags, enterops,
3075 enterops + GOTO_DEPTH);
eae48c89
Z
3076 if (retop)
3077 break;
3078 }
2b597662 3079 }
3280af22 3080 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
3081 }
3082 if (!retop)
b17a0679
FC
3083 DIE(aTHX_ "Can't find label %"UTF8f,
3084 UTF8fARG(label_flags, label_len, label));
a0d0e21e 3085
3b2447bc
RH
3086 /* if we're leaving an eval, check before we pop any frames
3087 that we're not going to punt, otherwise the error
3088 won't be caught */
3089
3090 if (leaving_eval && *enterops && enterops[1]) {
3091 I32 i;
3092 for (i = 1; enterops[i]; i++)
3093 if (enterops[i]->op_type == OP_ENTERITER)
3094 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3095 }
3096
b500e03b
GG
3097 if (*enterops && enterops[1]) {
3098 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3099 if (enterops[i])
3100 deprecate("\"goto\" to jump into a construct");
3101 }
3102
a0d0e21e
LW
3103 /* pop unwanted frames */
3104
3105 if (ix < cxstack_ix) {
3106 I32 oldsave;
3107
3108 if (ix < 0)
3109 ix = 0;
3110 dounwind(ix);
3111 TOPBLOCK(cx);
3280af22 3112 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3113 LEAVE_SCOPE(oldsave);
3114 }
3115
3116 /* push wanted frames */
3117
748a9306 3118 if (*enterops && enterops[1]) {
0bd48802 3119 OP * const oldop = PL_op;
33d34e4c
AE
3120 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3121 for (; enterops[ix]; ix++) {
533c011a 3122 PL_op = enterops[ix];
84902520
TB
3123 /* Eventually we may want to stack the needed arguments
3124 * for each op. For now, we punt on the hard ones. */
533c011a 3125 if (PL_op->op_type == OP_ENTERITER)
894356b3 3126 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3127 PL_op->op_ppaddr(aTHX);
a0d0e21e 3128 }
533c011a 3129 PL_op = oldop;
a0d0e21e
LW
3130 }
3131 }
3132
3133 if (do_dump) {
a5f75d66 3134#ifdef VMS
6b88bc9c 3135 if (!retop) retop = PL_main_start;
a5f75d66 3136#endif
3280af22
NIS
3137 PL_restartop = retop;
3138 PL_do_undump = TRUE;
a0d0e21e
LW
3139
3140 my_unexec();
3141
3280af22
NIS
3142 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3143 PL_do_undump = FALSE;
a0d0e21e
LW
3144 }
3145
47c9d59f 3146 PERL_ASYNC_CHECK();
a0d0e21e
LW
3147 RETURNOP(retop);
3148}
3149
3150PP(pp_exit)
3151{
97aff369 3152 dVAR;
39644a26 3153 dSP;
a0d0e21e
LW
3154 I32 anum;
3155
3156 if (MAXARG < 1)
3157 anum = 0;
9d3c658e
FC
3158 else if (!TOPs) {
3159 anum = 0; (void)POPs;
3160 }
ff0cee69 3161 else {
a0d0e21e 3162 anum = SvIVx(POPs);
d98f61e7
GS
3163#ifdef VMS
3164 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 3165 anum = 0;
96e176bf 3166 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3167#endif
3168 }
cc3604b1 3169 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
3170#ifdef PERL_MAD
3171 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3172 if (anum || !(PL_minus_c && PL_madskills))
3173 my_exit(anum);
3174#else
a0d0e21e 3175 my_exit(anum);
81d86705 3176#endif
3280af22 3177 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3178 RETURN;
3179}
3180
a0d0e21e
LW
3181/* Eval. */
3182
0824fdcb 3183STATIC void
cea2e8a9 3184S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3185{
504618e9 3186 const char *s = SvPVX_const(sv);
890ce7af 3187 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3188 I32 line = 1;
a0d0e21e 3189
7918f24d
NC
3190 PERL_ARGS_ASSERT_SAVE_LINES;
3191
a0d0e21e 3192 while (s && s < send) {
f54cb97a 3193 const char *t;
b9f83d2f 3194 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3195
1d963ff3 3196 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3197 if (t)
3198 t++;
3199 else
3200 t = send;
3201
3202 sv_setpvn(tmpstr, s, t - s);
3203 av_store(array, line++, tmpstr);
3204 s = t;
3205 }
3206}
3207
22f16304
RU
3208/*
3209=for apidoc docatch
3210
3211Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3212
32130 is used as continue inside eval,
3214
32153 is used for a die caught by an inner eval - continue inner loop
3216
3217See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3218establish a local jmpenv to handle exception traps.
3219
3220=cut
3221*/
0824fdcb 3222STATIC OP *
cea2e8a9 3223S_docatch(pTHX_ OP *o)
1e422769 3224{
97aff369 3225 dVAR;
6224f72b 3226 int ret;
06b5626a 3227 OP * const oldop = PL_op;
db36c5a1 3228 dJMPENV;
1e422769 3229
1e422769 3230#ifdef DEBUGGING
54310121 3231 assert(CATCH_GET == TRUE);
1e422769 3232#endif
312caa8e 3233 PL_op = o;
8bffa5f8 3234
14dd3ad8 3235 JMPENV_PUSH(ret);
6224f72b 3236 switch (ret) {
312caa8e 3237 case 0:
abd70938
DM
3238 assert(cxstack_ix >= 0);
3239 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3240 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3241 redo_body:
85aaa934 3242 CALLRUNOPS(aTHX);
312caa8e
CS
3243 break;
3244 case 3:
8bffa5f8 3245 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3246 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3247 PL_restartjmpenv = NULL;
312caa8e
CS
3248 PL_op = PL_restartop;
3249 PL_restartop = 0;
3250 goto redo_body;
3251 }
3252 /* FALL THROUGH */
3253 default:
14dd3ad8 3254 JMPENV_POP;
533c011a 3255 PL_op = oldop;
6224f72b 3256 JMPENV_JUMP(ret);
118e2215 3257 assert(0); /* NOTREACHED */
1e422769 3258 }
14dd3ad8 3259 JMPENV_POP;
533c011a 3260 PL_op = oldop;
5f66b61c 3261 return NULL;
1e422769
PP
3262}
3263
a3985cdc
DM
3264
3265/*
3266=for apidoc find_runcv
3267
3268Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
3269If db_seqp is non_null, skip CVs that are in the DB package and populate
3270*db_seqp with the cop sequence number at the point that the DB:: code was
3271entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3272than in the scope of the debugger itself).
a3985cdc
DM
3273
3274=cut
3275*/
3276
3277CV*
d819b83a 3278Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3279{
db4cf31d 3280 return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp);
70794f7b
FC
3281}
3282
3283/* If this becomes part of the API, it might need a better name. */
3284CV *
db4cf31d 3285Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp)
70794f7b 3286{
97aff369 3287 dVAR;
a3985cdc 3288 PERL_SI *si;
b4b0692a 3289 int level = 0;
a3985cdc 3290
d819b83a 3291 if (db_seqp)
c3923c33
DM
3292 *db_seqp =
3293 PL_curcop == &PL_compiling
3294 ? PL_cop_seqmax
3295 : PL_curcop->cop_seq;
3296
a3985cdc 3297 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3298 I32 ix;
a3985cdc 3299 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3300 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
70794f7b 3301 CV *cv = NULL;
d819b83a 3302 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
70794f7b 3303 cv = cx->blk_sub.cv;
d819b83a
DM
3304 /* skip DB:: code */
3305 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3306 *db_seqp = cx->blk_oldcop->cop_seq;
3307 continue;
3308 }
a453e28a
DM
3309 if (cx->cx_type & CXp_SUB_RE)
3310 continue;
d819b83a 3311 }
a3985cdc 3312 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
70794f7b
FC
3313 cv = cx->blk_eval.cv;
3314 if (cv) {
3315 switch (cond) {
db4cf31d
FC
3316 case FIND_RUNCV_padid_eq:
3317 if (!CvPADLIST(cv)
a56015b9 3318 || PadlistNAMES(CvPADLIST(cv)) != INT2PTR(PADNAMELIST *, arg))
8771da69 3319 continue;
b4b0692a
FC
3320 return cv;
3321 case FIND_RUNCV_level_eq:
db4cf31d 3322 if (level++ != arg) continue;
70794f7b
FC
3323 /* GERONIMO! */
3324 default:
3325 return cv;
3326 }
3327 }
a3985cdc
DM
3328 }
3329 }
db4cf31d 3330 return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv;
a3985cdc
DM
3331}
3332
3333
27e90453
DM
3334/* Run yyparse() in a setjmp wrapper. Returns:
3335 * 0: yyparse() successful
3336 * 1: yyparse() failed
3337 * 3: yyparse() died
3338 */
3339STATIC int
28ac2b49 3340S_try_yyparse(pTHX_ int gramtype)
27e90453
DM
3341{
3342 int ret;
3343 dJMPENV;
3344
3345 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3346 JMPENV_PUSH(ret);
3347 switch (ret) {
3348 case 0:
28ac2b49 3349 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM
3350 break;
3351 case 3:
3352 break;
3353 default:
3354 JMPENV_POP;
3355 JMPENV_JUMP(ret);
118e2215 3356 assert(0); /* NOTREACHED */
27e90453
DM
3357 }
3358 JMPENV_POP;
3359 return ret;
3360}
3361
3362
104a8185
DM
3363/* Compile a require/do or an eval ''.
3364 *
a3985cdc 3365 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM
3366 * seq is the current COP scope value.
3367 * hh is the saved hints hash, if any.
3368 *
410be5db 3369 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM
3370 * PL_eval_start contains the first op of the compiled code; otherwise,
3371 * pushes undef.
3372 *
3373 * This function is called from two places: pp_require and pp_entereval.
3374 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC
3375 */
3376
410be5db 3377STATIC bool
104a8185 3378S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3379{
27da23d5 3380 dVAR; dSP;
46c461b5 3381 OP * const saveop = PL_op;
104a8185 3382 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3383 COP * const oldcurcop = PL_curcop;
26c9400e 3384 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3385 int yystatus;
676a678a 3386 CV *evalcv;
a0d0e21e 3387
27e90453 3388 PL_in_eval = (in_require
6dc8a9e4 3389 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
a1941760
DM
3390 : (EVAL_INEVAL |
3391 ((PL_op->op_private & OPpEVAL_RE_REPARSING)
3392 ? EVAL_RE_REPARSING : 0)));
a0d0e21e 3393
1ce6579f
PP
3394 PUSHMARK(SP);
3395
676a678a
Z
3396 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3397 CvEVAL_on(evalcv);
2090ab20 3398 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3399 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3400 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3401
676a678a
Z
3402 CvOUTSIDE_SEQ(evalcv) = seq;
3403 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3404
dd2155a4 3405 /* set up a scratch pad */
a0d0e21e 3406
676a678a 3407 CvPADLIST(evalcv) = pad_new(padnew_SAVE);
cecbe010 3408 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3409
07055b4c 3410
81d86705 3411 if (!PL_madskills)
676a678a 3412 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3413
a0d0e21e
LW
3414 /* make sure we compile in the right package */
3415
ed094faf 3416 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026 3417 SAVEGENERICSV(PL_curstash);
cb1ad50e
FC
3418 PL_curstash = (HV *)CopSTASH(PL_curcop);
3419 if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL;
3420 else SvREFCNT_inc_simple_void(PL_curstash);
a0d0e21e 3421 }
3c10abe3 3422 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3423 SAVESPTR(PL_beginav);
3424 PL_beginav = newAV();
3425 SAVEFREESV(PL_beginav);
3c10abe3
AG