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make "for my $lex {}" faster under ITHREADS
[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{
39644a26 43 dSP;
a0d0e21e 44 I32 cxix;
93f0bc49 45 const PERL_CONTEXT *cx;
a0d0e21e
LW
46 EXTEND(SP, 1);
47
93f0bc49
FC
48 if (PL_op->op_private & OPpOFFBYONE) {
49 if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
50 }
51 else {
52 cxix = dopoptosub(cxstack_ix);
53 if (cxix < 0)
a0d0e21e 54 RETPUSHUNDEF;
93f0bc49
FC
55 cx = &cxstack[cxix];
56 }
a0d0e21e 57
93f0bc49 58 switch (cx->blk_gimme) {
54310121 59 case G_ARRAY:
a0d0e21e 60 RETPUSHYES;
54310121 61 case G_SCALAR:
a0d0e21e 62 RETPUSHNO;
54310121
PP
63 default:
64 RETPUSHUNDEF;
65 }
a0d0e21e
LW
66}
67
2cd61cdb
IZ
68PP(pp_regcreset)
69{
0b4182de 70 TAINT_NOT;
2cd61cdb
IZ
71 return NORMAL;
72}
73
b3eb6a9b
GS
74PP(pp_regcomp)
75{
39644a26 76 dSP;
eb578fdb 77 PMOP *pm = (PMOP*)cLOGOP->op_other;
9f141731 78 SV **args;
df787a7b 79 int nargs;
84679df5 80 REGEXP *re = NULL;
9f141731
DM
81 REGEXP *new_re;
82 const regexp_engine *eng;
dbc200c5 83 bool is_bare_re= FALSE;
bfed75c6 84
df787a7b
DM
85 if (PL_op->op_flags & OPf_STACKED) {
86 dMARK;
87 nargs = SP - MARK;
88 args = ++MARK;
89 }
90 else {
91 nargs = 1;
92 args = SP;
93 }
94
4b5a0d1c 95 /* prevent recompiling under /o and ithreads. */
3db8f154 96#if defined(USE_ITHREADS)
131b3ad0 97 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
df787a7b 98 SP = args-1;
131b3ad0
DM
99 RETURN;
100 }
513629ba 101#endif
d4b87e75 102
9f141731
DM
103 re = PM_GETRE(pm);
104 assert (re != (REGEXP*) &PL_sv_undef);
105 eng = re ? RX_ENGINE(re) : current_re_engine();
106
dbc200c5
YO
107 /*
108 In the below logic: these are basically the same - check if this regcomp is part of a split.
109
110 (PL_op->op_pmflags & PMf_split )
111 (PL_op->op_next->op_type == OP_PUSHRE)
112
113 We could add a new mask for this and copy the PMf_split, if we did
114 some bit definition fiddling first.
115
116 For now we leave this
117 */
118
3c13cae6
DM
119 new_re = (eng->op_comp
120 ? eng->op_comp
121 : &Perl_re_op_compile
122 )(aTHX_ args, nargs, pm->op_code_list, eng, re,
346d3070 123 &is_bare_re,
dbc200c5 124 (pm->op_pmflags & RXf_PMf_FLAGCOPYMASK),
a5ae69f0
DM
125 pm->op_pmflags |
126 (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
dbc200c5 127
346d3070 128 if (pm->op_pmflags & PMf_HAS_CV)
8d919b0a 129 ReANY(new_re)->qr_anoncv
9fe3265f 130 = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
9f141731
DM
131
132 if (is_bare_re) {
133 REGEXP *tmp;
134 /* The match's LHS's get-magic might need to access this op's regexp
135 (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
136 get-magic now before we replace the regexp. Hopefully this hack can
137 be replaced with the approach described at
138 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
139 some day. */
140 if (pm->op_type == OP_MATCH) {
141 SV *lhs;
284167a5 142 const bool was_tainted = TAINT_get;
9f141731
DM
143 if (pm->op_flags & OPf_STACKED)
144 lhs = args[-1];
6ffceeb7 145 else if (pm->op_targ)
9f141731
DM
146 lhs = PAD_SV(pm->op_targ);
147 else lhs = DEFSV;
148 SvGETMAGIC(lhs);
149 /* Restore the previous value of PL_tainted (which may have been
150 modified by get-magic), to avoid incorrectly setting the
284167a5
SM
151 RXf_TAINTED flag with RX_TAINT_on further down. */
152 TAINT_set(was_tainted);
dc6d7f5c 153#ifdef NO_TAINT_SUPPORT
9a9b5ec9
DM
154 PERL_UNUSED_VAR(was_tainted);
155#endif
df787a7b 156 }
9f141731
DM
157 tmp = reg_temp_copy(NULL, new_re);
158 ReREFCNT_dec(new_re);
159 new_re = tmp;
df787a7b 160 }
dbc200c5 161
9f141731
DM
162 if (re != new_re) {
163 ReREFCNT_dec(re);
164 PM_SETRE(pm, new_re);
c277df42 165 }
d4b87e75 166
dbc200c5 167
d48c660d
DM
168 assert(TAINTING_get || !TAINT_get);
169 if (TAINT_get) {
9f141731 170 SvTAINTED_on((SV*)new_re);
284167a5 171 RX_TAINT_on(new_re);
72311751 172 }
72311751 173
c737faaf
YO
174#if !defined(USE_ITHREADS)
175 /* can't change the optree at runtime either */
176 /* PMf_KEEP is handled differently under threads to avoid these problems */
9f141731
DM
177 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
178 pm = PL_curpm;
a0d0e21e 179 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 180 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 181 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 182 }
c737faaf 183#endif
9f141731 184
df787a7b 185 SP = args-1;
a0d0e21e
LW
186 RETURN;
187}
188
9f141731 189
a0d0e21e
LW
190PP(pp_substcont)
191{
39644a26 192 dSP;
eb578fdb
KW
193 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
194 PMOP * const pm = (PMOP*) cLOGOP->op_other;
195 SV * const dstr = cx->sb_dstr;
196 char *s = cx->sb_s;
197 char *m = cx->sb_m;
a0d0e21e 198 char *orig = cx->sb_orig;
eb578fdb 199 REGEXP * const rx = cx->sb_rx;
c445ea15 200 SV *nsv = NULL;
988e6e7e 201 REGEXP *old = PM_GETRE(pm);
f410a211
NC
202
203 PERL_ASYNC_CHECK();
204
988e6e7e 205 if(old != rx) {
bfed75c6 206 if(old)
988e6e7e 207 ReREFCNT_dec(old);
d6106309 208 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
209 }
210
d9f97599 211 rxres_restore(&cx->sb_rxres, rx);
c90c0ff4 212
a0d0e21e 213 if (cx->sb_iters++) {
3c6ef0a5 214 const SSize_t saviters = cx->sb_iters;
a0d0e21e 215 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 216 DIE(aTHX_ "Substitution loop");
a0d0e21e 217
447ee134
DM
218 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
219
ef07e810 220 /* See "how taint works" above pp_subst() */
20be6587
DM
221 if (SvTAINTED(TOPs))
222 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 223 sv_catsv_nomg(dstr, POPs);
2c296965 224 if (CxONCE(cx) || s < orig ||
03c83e26
DM
225 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
226 (s == m), cx->sb_targ, NULL,
d5e7783a 227 (REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW)))
a0d0e21e 228 {
8ca8a454 229 SV *targ = cx->sb_targ;
748a9306 230
078c425b
JH
231 assert(cx->sb_strend >= s);
232 if(cx->sb_strend > s) {
233 if (DO_UTF8(dstr) && !SvUTF8(targ))
4bac9ae4 234 sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
078c425b 235 else
4bac9ae4 236 sv_catpvn_nomg(dstr, s, cx->sb_strend - s);
078c425b 237 }
20be6587
DM
238 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
239 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 240
8ca8a454
NC
241 if (pm->op_pmflags & PMf_NONDESTRUCT) {
242 PUSHs(dstr);
243 /* From here on down we're using the copy, and leaving the
244 original untouched. */
245 targ = dstr;
246 }
247 else {
9e0ea7f3
FC
248 SV_CHECK_THINKFIRST_COW_DROP(targ);
249 if (isGV(targ)) Perl_croak_no_modify();
250 SvPV_free(targ);
8ca8a454
NC
251 SvPV_set(targ, SvPVX(dstr));
252 SvCUR_set(targ, SvCUR(dstr));
253 SvLEN_set(targ, SvLEN(dstr));
254 if (DO_UTF8(dstr))
255 SvUTF8_on(targ);
256 SvPV_set(dstr, NULL);
257
52c47e16 258 PL_tainted = 0;
4f4d7508 259 mPUSHi(saviters - 1);
48c036b1 260
8ca8a454
NC
261 (void)SvPOK_only_UTF8(targ);
262 }
5cd24f17 263
20be6587 264 /* update the taint state of various various variables in
ef07e810
DM
265 * preparation for final exit.
266 * See "how taint works" above pp_subst() */
284167a5 267 if (TAINTING_get) {
20be6587
DM
268 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
269 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
270 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
271 )
272 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
273
274 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
275 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
276 )
277 SvTAINTED_on(TOPs); /* taint return value */
278 /* needed for mg_set below */
284167a5
SM
279 TAINT_set(
280 cBOOL(cx->sb_rxtainted &
281 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))
282 );
20be6587
DM
283 SvTAINT(TARG);
284 }
285 /* PL_tainted must be correctly set for this mg_set */
286 SvSETMAGIC(TARG);
287 TAINT_NOT;
4633a7c4 288 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e 289 POPSUBST(cx);
47c9d59f 290 PERL_ASYNC_CHECK();
a0d0e21e 291 RETURNOP(pm->op_next);
e5964223 292 NOT_REACHED; /* NOTREACHED */
a0d0e21e 293 }
8e5e9ebe 294 cx->sb_iters = saviters;
a0d0e21e 295 }
07bc277f 296 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
297 m = s;
298 s = orig;
6502e081 299 assert(!RX_SUBOFFSET(rx));
07bc277f 300 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
301 s = orig + (m - s);
302 cx->sb_strend = s + (cx->sb_strend - m);
303 }
07bc277f 304 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 305 if (m > s) {
bfed75c6 306 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
4bac9ae4 307 sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv);
db79b45b 308 else
4bac9ae4 309 sv_catpvn_nomg(dstr, s, m-s);
db79b45b 310 }
07bc277f 311 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 312 { /* Update the pos() information. */
8ca8a454
NC
313 SV * const sv
314 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 315 MAGIC *mg;
a911bb25
DM
316
317 /* the string being matched against may no longer be a string,
318 * e.g. $_=0; s/.../$_++/ge */
319
320 if (!SvPOK(sv))
321 SvPV_force_nomg_nolen(sv);
322
96c2a8ff
FC
323 if (!(mg = mg_find_mglob(sv))) {
324 mg = sv_magicext_mglob(sv);
084916e3 325 }
cda67c99 326 MgBYTEPOS_set(mg, sv, SvPVX(sv), m - orig);
084916e3 327 }
988e6e7e 328 if (old != rx)
d6106309 329 (void)ReREFCNT_inc(rx);
20be6587 330 /* update the taint state of various various variables in preparation
ef07e810
DM
331 * for calling the code block.
332 * See "how taint works" above pp_subst() */
284167a5 333 if (TAINTING_get) {
20be6587
DM
334 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
335 cx->sb_rxtainted |= SUBST_TAINT_PAT;
336
337 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
338 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
339 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
340 )
341 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
342
343 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
344 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC
345 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
346 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM
347 TAINT_NOT;
348 }
d9f97599 349 rxres_save(&cx->sb_rxres, rx);
af9838cc 350 PL_curpm = pm;
29f2e912 351 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
352}
353
c90c0ff4 354void
864dbfa3 355Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
356{
357 UV *p = (UV*)*rsp;
358 U32 i;
7918f24d
NC
359
360 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 361 PERL_UNUSED_CONTEXT;
c90c0ff4 362
07bc277f 363 if (!p || p[1] < RX_NPARENS(rx)) {
db2c6cb3 364#ifdef PERL_ANY_COW
6502e081 365 i = 7 + (RX_NPARENS(rx)+1) * 2;
ed252734 366#else
6502e081 367 i = 6 + (RX_NPARENS(rx)+1) * 2;
ed252734 368#endif
c90c0ff4 369 if (!p)
a02a5408 370 Newx(p, i, UV);
c90c0ff4
PP
371 else
372 Renew(p, i, UV);
373 *rsp = (void*)p;
374 }
375
5eabab15
DM
376 /* what (if anything) to free on croak */
377 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 378 RX_MATCH_COPIED_off(rx);
6c31ff74 379 *p++ = RX_NPARENS(rx);
c90c0ff4 380
db2c6cb3 381#ifdef PERL_ANY_COW
bdd9a1b1
NC
382 *p++ = PTR2UV(RX_SAVED_COPY(rx));
383 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
384#endif
385
07bc277f
NC
386 *p++ = PTR2UV(RX_SUBBEG(rx));
387 *p++ = (UV)RX_SUBLEN(rx);
6502e081
DM
388 *p++ = (UV)RX_SUBOFFSET(rx);
389 *p++ = (UV)RX_SUBCOFFSET(rx);
07bc277f
NC
390 for (i = 0; i <= RX_NPARENS(rx); ++i) {
391 *p++ = (UV)RX_OFFS(rx)[i].start;
392 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
393 }
394}
395
9c105995
NC
396static void
397S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
398{
399 UV *p = (UV*)*rsp;
400 U32 i;
7918f24d
NC
401
402 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 403 PERL_UNUSED_CONTEXT;
c90c0ff4 404
ed252734 405 RX_MATCH_COPY_FREE(rx);
cf93c79d 406 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 407 *p++ = 0;
6c31ff74 408 RX_NPARENS(rx) = *p++;
c90c0ff4 409
db2c6cb3 410#ifdef PERL_ANY_COW
bdd9a1b1
NC
411 if (RX_SAVED_COPY(rx))
412 SvREFCNT_dec (RX_SAVED_COPY(rx));
413 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
414 *p++ = 0;
415#endif
416
07bc277f
NC
417 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
418 RX_SUBLEN(rx) = (I32)(*p++);
6502e081
DM
419 RX_SUBOFFSET(rx) = (I32)*p++;
420 RX_SUBCOFFSET(rx) = (I32)*p++;
07bc277f
NC
421 for (i = 0; i <= RX_NPARENS(rx); ++i) {
422 RX_OFFS(rx)[i].start = (I32)(*p++);
423 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
424 }
425}
426
9c105995
NC
427static void
428S_rxres_free(pTHX_ void **rsp)
c90c0ff4 429{
44f8325f 430 UV * const p = (UV*)*rsp;
7918f24d
NC
431
432 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 433 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
434
435 if (p) {
94010e71 436 void *tmp = INT2PTR(char*,*p);
6c31ff74 437#ifdef PERL_POISON
db2c6cb3 438#ifdef PERL_ANY_COW
6c31ff74 439 U32 i = 9 + p[1] * 2;
94010e71 440#else
6c31ff74 441 U32 i = 8 + p[1] * 2;
94010e71 442#endif
6c31ff74
NC
443#endif
444
db2c6cb3 445#ifdef PERL_ANY_COW
6c31ff74 446 SvREFCNT_dec (INT2PTR(SV*,p[2]));
ed252734 447#endif
6c31ff74
NC
448#ifdef PERL_POISON
449 PoisonFree(p, i, sizeof(UV));
450#endif
451
452 Safefree(tmp);
c90c0ff4 453 Safefree(p);
4608196e 454 *rsp = NULL;
c90c0ff4
PP
455 }
456}
457
a701009a
DM
458#define FORM_NUM_BLANK (1<<30)
459#define FORM_NUM_POINT (1<<29)
460
a0d0e21e
LW
461PP(pp_formline)
462{
20b7effb 463 dSP; dMARK; dORIGMARK;
eb578fdb 464 SV * const tmpForm = *++MARK;
086b26f3 465 SV *formsv; /* contains text of original format */
eb578fdb
KW
466 U32 *fpc; /* format ops program counter */
467 char *t; /* current append position in target string */
086b26f3 468 const char *f; /* current position in format string */
eb578fdb
KW
469 I32 arg;
470 SV *sv = NULL; /* current item */
086b26f3 471 const char *item = NULL;/* string value of current item */
9b4bdfd4
DM
472 I32 itemsize = 0; /* length (chars) of item, possibly truncated */
473 I32 itembytes = 0; /* as itemsize, but length in bytes */
086b26f3
DM
474 I32 fieldsize = 0; /* width of current field */
475 I32 lines = 0; /* number of lines that have been output */
476 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
477 const char *chophere = NULL; /* where to chop current item */
f5ada144 478 STRLEN linemark = 0; /* pos of start of line in output */
65202027 479 NV value;
086b26f3 480 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
9b4bdfd4 481 STRLEN len; /* length of current sv */
26e935cf 482 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH
483 bool item_is_utf8 = FALSE;
484 bool targ_is_utf8 = FALSE;
bd7084a6 485 const char *fmt;
74e0ddf7 486 MAGIC *mg = NULL;
4ff700b9
DM
487 U8 *source; /* source of bytes to append */
488 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 489 char trans; /* what chars to translate */
74e0ddf7 490
3808a683 491 mg = doparseform(tmpForm);
a0d0e21e 492
74e0ddf7 493 fpc = (U32*)mg->mg_ptr;
3808a683
DM
494 /* the actual string the format was compiled from.
495 * with overload etc, this may not match tmpForm */
496 formsv = mg->mg_obj;
497
74e0ddf7 498
3280af22 499 SvPV_force(PL_formtarget, len);
3808a683 500 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 501 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH
502 if (DO_UTF8(PL_formtarget))
503 targ_is_utf8 = TRUE;
26e935cf
DM
504 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
505 t = SvGROW(PL_formtarget, len + linemax + 1);
506 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 507 t += len;
3808a683 508 f = SvPV_const(formsv, len);
a0d0e21e
LW
509
510 for (;;) {
511 DEBUG_f( {
bfed75c6 512 const char *name = "???";
a0d0e21e
LW
513 arg = -1;
514 switch (*fpc) {
515 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
516 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
517 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
518 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
519 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
520
521 case FF_CHECKNL: name = "CHECKNL"; break;
522 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
523 case FF_SPACE: name = "SPACE"; break;
524 case FF_HALFSPACE: name = "HALFSPACE"; break;
525 case FF_ITEM: name = "ITEM"; break;
526 case FF_CHOP: name = "CHOP"; break;
527 case FF_LINEGLOB: name = "LINEGLOB"; break;
528 case FF_NEWLINE: name = "NEWLINE"; break;
529 case FF_MORE: name = "MORE"; break;
530 case FF_LINEMARK: name = "LINEMARK"; break;
531 case FF_END: name = "END"; break;
bfed75c6 532 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 533 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
534 }
535 if (arg >= 0)
bf49b057 536 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 537 else
bf49b057 538 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 539 } );
a0d0e21e 540 switch (*fpc++) {
4a73dc0b 541 case FF_LINEMARK: /* start (or end) of a line */
f5ada144 542 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW
543 lines++;
544 gotsome = FALSE;
545 break;
546
4a73dc0b 547 case FF_LITERAL: /* append <arg> literal chars */
ea60cfe8
DM
548 to_copy = *fpc++;
549 source = (U8 *)f;
550 f += to_copy;
551 trans = '~';
75645721 552 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 553 goto append;
a0d0e21e 554
4a73dc0b 555 case FF_SKIP: /* skip <arg> chars in format */
a0d0e21e
LW
556 f += *fpc++;
557 break;
558
4a73dc0b 559 case FF_FETCH: /* get next item and set field size to <arg> */
a0d0e21e
LW
560 arg = *fpc++;
561 f += arg;
562 fieldsize = arg;
563
564 if (MARK < SP)
565 sv = *++MARK;
566 else {
3280af22 567 sv = &PL_sv_no;
a2a5de95 568 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 569 }
125b9982
NT
570 if (SvTAINTED(sv))
571 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW
572 break;
573
4a73dc0b 574 case FF_CHECKNL: /* find max len of item (up to \n) that fits field */
5a34cab7 575 {
5a34cab7 576 const char *s = item = SvPV_const(sv, len);
9b4bdfd4
DM
577 const char *send = s + len;
578
579 itemsize = 0;
580 item_is_utf8 = DO_UTF8(sv);
581 while (s < send) {
582 if (!isCNTRL(*s))
583 gotsome = TRUE;
584 else if (*s == '\n')
585 break;
586
587 if (item_is_utf8)
588 s += UTF8SKIP(s);
589 else
590 s++;
591 itemsize++;
592 if (itemsize == fieldsize)
593 break;
594 }
595 itembytes = s - item;
62db6ea5 596 chophere = s;
5a34cab7 597 break;
a0ed51b3 598 }
a0d0e21e 599
4a73dc0b 600 case FF_CHECKCHOP: /* like CHECKNL, but up to highest split point */
5a34cab7
NC
601 {
602 const char *s = item = SvPV_const(sv, len);
9b4bdfd4
DM
603 const char *send = s + len;
604 I32 size = 0;
605
606 chophere = NULL;
607 item_is_utf8 = DO_UTF8(sv);
608 while (s < send) {
609 /* look for a legal split position */
610 if (isSPACE(*s)) {
611 if (*s == '\r') {
612 chophere = s;
613 itemsize = size;
614 break;
615 }
616 if (chopspace) {
617 /* provisional split point */
618 chophere = s;
619 itemsize = size;
620 }
621 /* we delay testing fieldsize until after we've
622 * processed the possible split char directly
623 * following the last field char; so if fieldsize=3
624 * and item="a b cdef", we consume "a b", not "a".
625 * Ditto further down.
626 */
627 if (size == fieldsize)
628 break;
629 }
630 else {
631 if (strchr(PL_chopset, *s)) {
632 /* provisional split point */
633 /* for a non-space split char, we include
634 * the split char; hence the '+1' */
635 chophere = s + 1;
636 itemsize = size;
637 }
638 if (size == fieldsize)
639 break;
640 if (!isCNTRL(*s))
641 gotsome = TRUE;
642 }
643
644 if (item_is_utf8)
645 s += UTF8SKIP(s);
646 else
077dbbf3 647 s++;
9b4bdfd4
DM
648 size++;
649 }
650 if (!chophere || s == send) {
651 chophere = s;
652 itemsize = size;
653 }
654 itembytes = chophere - item;
655
5a34cab7 656 break;
a0d0e21e 657 }
a0d0e21e 658
4a73dc0b 659 case FF_SPACE: /* append padding space (diff of field, item size) */
a0d0e21e
LW
660 arg = fieldsize - itemsize;
661 if (arg) {
662 fieldsize -= arg;
663 while (arg-- > 0)
664 *t++ = ' ';
665 }
666 break;
667
4a73dc0b 668 case FF_HALFSPACE: /* like FF_SPACE, but only append half as many */
a0d0e21e
LW
669 arg = fieldsize - itemsize;
670 if (arg) {
671 arg /= 2;
672 fieldsize -= arg;
673 while (arg-- > 0)
674 *t++ = ' ';
675 }
676 break;
677
4a73dc0b 678 case FF_ITEM: /* append a text item, while blanking ctrl chars */
9b4bdfd4 679 to_copy = itembytes;
8aa7beb6
DM
680 source = (U8 *)item;
681 trans = 1;
8aa7beb6 682 goto append;
a0d0e21e 683
4a73dc0b 684 case FF_CHOP: /* (for ^*) chop the current item */
fb9282c3 685 if (sv != &PL_sv_no) {
5a34cab7
NC
686 const char *s = chophere;
687 if (chopspace) {
af68e756 688 while (isSPACE(*s))
5a34cab7
NC
689 s++;
690 }
9b4bdfd4
DM
691 if (SvPOKp(sv))
692 sv_chop(sv,s);
693 else
694 /* tied, overloaded or similar strangeness.
695 * Do it the hard way */
696 sv_setpvn(sv, s, len - (s-item));
5a34cab7
NC
697 SvSETMAGIC(sv);
698 break;
a0d0e21e 699 }
a0d0e21e 700
4a73dc0b 701 case FF_LINESNGL: /* process ^* */
a1b95068 702 chopspace = 0;
c67159e1 703 /* FALLTHROUGH */
4a73dc0b
DM
704
705 case FF_LINEGLOB: /* process @* */
5a34cab7 706 {
e32383e2 707 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 708 const char *s = item = SvPV_const(sv, len);
7440a75b 709 const char *const send = s + len;
7440a75b 710
f3f2f1a3 711 item_is_utf8 = DO_UTF8(sv);
fb9282c3 712 chophere = s + len;
a1137ee5 713 if (!len)
7440a75b 714 break;
ea60cfe8 715 trans = 0;
0d21cefe 716 gotsome = TRUE;
4ff700b9
DM
717 source = (U8 *) s;
718 to_copy = len;
0d21cefe
DM
719 while (s < send) {
720 if (*s++ == '\n') {
721 if (oneline) {
9b4bdfd4 722 to_copy = s - item - 1;
0d21cefe
DM
723 chophere = s;
724 break;
725 } else {
726 if (s == send) {
0d21cefe
DM
727 to_copy--;
728 } else
729 lines++;
1bd51a4c 730 }
a0d0e21e 731 }
0d21cefe 732 }
a2c0032b
DM
733 }
734
ea60cfe8
DM
735 append:
736 /* append to_copy bytes from source to PL_formstring.
737 * item_is_utf8 implies source is utf8.
738 * if trans, translate certain characters during the copy */
a2c0032b
DM
739 {
740 U8 *tmp = NULL;
26e935cf 741 STRLEN grow = 0;
0325ce87
DM
742
743 SvCUR_set(PL_formtarget,
744 t - SvPVX_const(PL_formtarget));
745
0d21cefe
DM
746 if (targ_is_utf8 && !item_is_utf8) {
747 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM
748 } else {
749 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 750 U8 *s;
0d21cefe 751 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM
752 a problem we have a simple solution for.
753 Don't need get magic. */
0d21cefe 754 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 755 targ_is_utf8 = TRUE;
f5ada144
DM
756 /* re-calculate linemark */
757 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM
758 /* the bytes we initially allocated to append the
759 * whole line may have been gobbled up during the
760 * upgrade, so allocate a whole new line's worth
761 * for safety */
762 grow = linemax;
f5ada144
DM
763 while (linemark--)
764 s += UTF8SKIP(s);
765 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 766 }
0d21cefe
DM
767 /* Easy. They agree. */
768 assert (item_is_utf8 == targ_is_utf8);
769 }
26e935cf
DM
770 if (!trans)
771 /* @* and ^* are the only things that can exceed
772 * the linemax, so grow by the output size, plus
773 * a whole new form's worth in case of any further
774 * output */
775 grow = linemax + to_copy;
776 if (grow)
777 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM
778 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
779
780 Copy(source, t, to_copy, char);
ea60cfe8 781 if (trans) {
8aa7beb6
DM
782 /* blank out ~ or control chars, depending on trans.
783 * works on bytes not chars, so relies on not
784 * matching utf8 continuation bytes */
ea60cfe8
DM
785 U8 *s = (U8*)t;
786 U8 *send = s + to_copy;
787 while (s < send) {
8aa7beb6 788 const int ch = *s;
077dbbf3 789 if (trans == '~' ? (ch == '~') : isCNTRL(ch))
ea60cfe8
DM
790 *s = ' ';
791 s++;
792 }
793 }
794
0d21cefe
DM
795 t += to_copy;
796 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 797 if (tmp)
0d21cefe 798 Safefree(tmp);
5a34cab7 799 break;
a0d0e21e 800 }
a0d0e21e 801
4a73dc0b 802 case FF_0DECIMAL: /* like FF_DECIMAL but for 0### */
a0d0e21e 803 arg = *fpc++;
bd7084a6 804 fmt = (const char *)
a029fa42 805 ((arg & FORM_NUM_POINT) ? "%#0*.*" NVff : "%0*.*" NVff);
bd7084a6 806 goto ff_dec;
5d37acd6 807
bd7084a6
DM
808 case FF_DECIMAL: /* do @##, ^##, where <arg>=(precision|flags) */
809 arg = *fpc++;
bd7084a6 810 fmt = (const char *)
a029fa42 811 ((arg & FORM_NUM_POINT) ? "%#*.*" NVff : "%*.*" NVff);
bd7084a6 812 ff_dec:
784707d5
JP
813 /* If the field is marked with ^ and the value is undefined,
814 blank it out. */
a701009a 815 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP
816 arg = fieldsize;
817 while (arg--)
818 *t++ = ' ';
819 break;
820 }
821 gotsome = TRUE;
822 value = SvNV(sv);
a1b95068 823 /* overflow evidence */
bfed75c6 824 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
825 arg = fieldsize;
826 while (arg--)
827 *t++ = '#';
828 break;
829 }
784707d5
JP
830 /* Formats aren't yet marked for locales, so assume "yes". */
831 {
e8549682
JH
832 Size_t max = SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget));
833 int len;
67d796ae
KW
834 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
835 STORE_LC_NUMERIC_SET_TO_NEEDED();
51f14a05 836 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
a4eca1d4
JH
837#ifdef USE_QUADMATH
838 {
839 const char* qfmt = quadmath_format_single(fmt);
840 int len;
841 if (!qfmt)
842 Perl_croak_nocontext("panic: quadmath invalid format \"%s\"", fmt);
843 len = quadmath_snprintf(t, max, qfmt, (int) fieldsize, (int) arg, value);
844 if (len == -1)
845 Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt);
846 if (qfmt != fmt)
847 Safefree(fmt);
848 }
849#else
b587c0e8
DM
850 /* we generate fmt ourselves so it is safe */
851 GCC_DIAG_IGNORE(-Wformat-nonliteral);
e8549682 852 len = my_snprintf(t, max, fmt, (int) fieldsize, (int) arg, value);
b587c0e8 853 GCC_DIAG_RESTORE;
a4eca1d4
JH
854#endif
855 PERL_MY_SNPRINTF_POST_GUARD(len, max);
a2287a13 856 RESTORE_LC_NUMERIC();
784707d5
JP
857 }
858 t += fieldsize;
859 break;
a1b95068 860
4a73dc0b 861 case FF_NEWLINE: /* delete trailing spaces, then append \n */
a0d0e21e 862 f++;
f5ada144 863 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW
864 t++;
865 *t++ = '\n';
866 break;
867
4a73dc0b 868 case FF_BLANK: /* for arg==0: do '~'; for arg>0 : do '~~' */
a0d0e21e
LW
869 arg = *fpc++;
870 if (gotsome) {
871 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM
872 fpc--;
873 goto end;
a0d0e21e
LW
874 }
875 }
876 else {
f5ada144 877 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW
878 lines--;
879 }
880 break;
881
4a73dc0b 882 case FF_MORE: /* replace long end of string with '...' */
5a34cab7
NC
883 {
884 const char *s = chophere;
885 const char *send = item + len;
886 if (chopspace) {
af68e756 887 while (isSPACE(*s) && (s < send))
5a34cab7 888 s++;
a0d0e21e 889 }
5a34cab7
NC
890 if (s < send) {
891 char *s1;
892 arg = fieldsize - itemsize;
893 if (arg) {
894 fieldsize -= arg;
895 while (arg-- > 0)
896 *t++ = ' ';
897 }
898 s1 = t - 3;
899 if (strnEQ(s1," ",3)) {
900 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
901 s1--;
902 }
903 *s1++ = '.';
904 *s1++ = '.';
905 *s1++ = '.';
a0d0e21e 906 }
5a34cab7 907 break;
a0d0e21e 908 }
4a73dc0b
DM
909
910 case FF_END: /* tidy up, then return */
11f9eeaf 911 end:
bf2bec63 912 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 913 *t = '\0';
b15aece3 914 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
915 if (targ_is_utf8)
916 SvUTF8_on(PL_formtarget);
3280af22 917 FmLINES(PL_formtarget) += lines;
a0d0e21e 918 SP = ORIGMARK;
11f9eeaf
DM
919 if (fpc[-1] == FF_BLANK)
920 RETURNOP(cLISTOP->op_first);
921 else
922 RETPUSHYES;
a0d0e21e
LW
923 }
924 }
925}
926
927PP(pp_grepstart)
928{
20b7effb 929 dSP;
a0d0e21e
LW
930 SV *src;
931
6cae08a8 932 if (PL_stack_base + TOPMARK == SP) {
a0d0e21e 933 (void)POPMARK;
54310121 934 if (GIMME_V == G_SCALAR)
6e449a3a 935 mXPUSHi(0);
533c011a 936 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 937 }
6cae08a8 938 PL_stack_sp = PL_stack_base + TOPMARK + 1;
897d3989
NC
939 Perl_pp_pushmark(aTHX); /* push dst */
940 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 941 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
942
943 SAVETMPS;
ffd49c98 944 SAVE_DEFSV;
d343c3ef 945 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 946 SAVEVPTR(PL_curpm);
a0d0e21e 947
6cae08a8 948 src = PL_stack_base[TOPMARK];
60779a30 949 if (SvPADTMP(src)) {
6cae08a8 950 src = PL_stack_base[TOPMARK] = sv_mortalcopy(src);
a0ed822e
FC
951 PL_tmps_floor++;
952 }
a0d0e21e 953 SvTEMP_off(src);
ffd49c98 954 DEFSV_set(src);
a0d0e21e
LW
955
956 PUTBACK;
533c011a 957 if (PL_op->op_type == OP_MAPSTART)
897d3989 958 Perl_pp_pushmark(aTHX); /* push top */
533c011a 959 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
960}
961
a0d0e21e
LW
962PP(pp_mapwhile)
963{
20b7effb 964 dSP;
f54cb97a 965 const I32 gimme = GIMME_V;
6cae08a8 966 I32 items = (SP - PL_stack_base) - TOPMARK; /* how many new items */
a0d0e21e
LW
967 I32 count;
968 I32 shift;
969 SV** src;
ac27b0f5 970 SV** dst;
a0d0e21e 971
544f3153 972 /* first, move source pointer to the next item in the source list */
3280af22 973 ++PL_markstack_ptr[-1];
544f3153
GS
974
975 /* if there are new items, push them into the destination list */
4c90a460 976 if (items && gimme != G_VOID) {
544f3153
GS
977 /* might need to make room back there first */
978 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
979 /* XXX this implementation is very pessimal because the stack
980 * is repeatedly extended for every set of items. Is possible
981 * to do this without any stack extension or copying at all
982 * by maintaining a separate list over which the map iterates
18ef8bea 983 * (like foreach does). --gsar */
544f3153
GS
984
985 /* everything in the stack after the destination list moves
986 * towards the end the stack by the amount of room needed */
987 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
988
989 /* items to shift up (accounting for the moved source pointer) */
990 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
991
992 /* This optimization is by Ben Tilly and it does
993 * things differently from what Sarathy (gsar)
994 * is describing. The downside of this optimization is
995 * that leaves "holes" (uninitialized and hopefully unused areas)
996 * to the Perl stack, but on the other hand this
997 * shouldn't be a problem. If Sarathy's idea gets
998 * implemented, this optimization should become
999 * irrelevant. --jhi */
1000 if (shift < count)
1001 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1002
924508f0
GS
1003 EXTEND(SP,shift);
1004 src = SP;
1005 dst = (SP += shift);
3280af22
NIS
1006 PL_markstack_ptr[-1] += shift;
1007 *PL_markstack_ptr += shift;
544f3153 1008 while (count--)
a0d0e21e
LW
1009 *dst-- = *src--;
1010 }
544f3153 1011 /* copy the new items down to the destination list */
ac27b0f5 1012 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1013 if (gimme == G_ARRAY) {
b2a2a901
DM
1014 /* add returned items to the collection (making mortal copies
1015 * if necessary), then clear the current temps stack frame
1016 * *except* for those items. We do this splicing the items
1017 * into the start of the tmps frame (so some items may be on
59d53fd6 1018 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM
1019 * them, then freeing the frame. That way, the only tmps that
1020 * accumulate over iterations are the return values for map.
1021 * We have to do to this way so that everything gets correctly
1022 * freed if we die during the map.
1023 */
1024 I32 tmpsbase;
1025 I32 i = items;
1026 /* make space for the slice */
1027 EXTEND_MORTAL(items);
1028 tmpsbase = PL_tmps_floor + 1;
1029 Move(PL_tmps_stack + tmpsbase,
1030 PL_tmps_stack + tmpsbase + items,
1031 PL_tmps_ix - PL_tmps_floor,
1032 SV*);
1033 PL_tmps_ix += items;
1034
1035 while (i-- > 0) {
1036 SV *sv = POPs;
1037 if (!SvTEMP(sv))
1038 sv = sv_mortalcopy(sv);
1039 *dst-- = sv;
1040 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1041 }
1042 /* clear the stack frame except for the items */
1043 PL_tmps_floor += items;
1044 FREETMPS;
1045 /* FREETMPS may have cleared the TEMP flag on some of the items */
1046 i = items;
1047 while (i-- > 0)
1048 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1049 }
bfed75c6 1050 else {
22023b26
TP
1051 /* scalar context: we don't care about which values map returns
1052 * (we use undef here). And so we certainly don't want to do mortal
1053 * copies of meaningless values. */
1054 while (items-- > 0) {
b988aa42 1055 (void)POPs;
22023b26
TP
1056 *dst-- = &PL_sv_undef;
1057 }
b2a2a901 1058 FREETMPS;
22023b26 1059 }
a0d0e21e 1060 }
b2a2a901
DM
1061 else {
1062 FREETMPS;
1063 }
d343c3ef 1064 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1065
1066 /* All done yet? */
6cae08a8 1067 if (PL_markstack_ptr[-1] > TOPMARK) {
a0d0e21e
LW
1068
1069 (void)POPMARK; /* pop top */
d343c3ef 1070 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1071 (void)POPMARK; /* pop src */
3280af22 1072 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1073 (void)POPMARK; /* pop dst */
3280af22 1074 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1075 if (gimme == G_SCALAR) {
7cc47870
RGS
1076 dTARGET;
1077 XPUSHi(items);
a0d0e21e 1078 }
54310121
PP
1079 else if (gimme == G_ARRAY)
1080 SP += items;
a0d0e21e
LW
1081 RETURN;
1082 }
1083 else {
1084 SV *src;
1085
d343c3ef 1086 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1087 SAVEVPTR(PL_curpm);
a0d0e21e 1088
544f3153 1089 /* set $_ to the new source item */
3280af22 1090 src = PL_stack_base[PL_markstack_ptr[-1]];
60779a30 1091 if (SvPADTMP(src)) {
60779a30
DM
1092 src = sv_mortalcopy(src);
1093 }
a0d0e21e 1094 SvTEMP_off(src);
ffd49c98 1095 DEFSV_set(src);
a0d0e21e
LW
1096
1097 RETURNOP(cLOGOP->op_other);
1098 }
1099}
1100
a0d0e21e
LW
1101/* Range stuff. */
1102
1103PP(pp_range)
1104{
82334630 1105 if (GIMME_V == G_ARRAY)
1a67a97c 1106 return NORMAL;
538573f7 1107 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1108 return cLOGOP->op_other;
538573f7 1109 else
1a67a97c 1110 return NORMAL;
a0d0e21e
LW
1111}
1112
1113PP(pp_flip)
1114{
39644a26 1115 dSP;
a0d0e21e 1116
82334630 1117 if (GIMME_V == G_ARRAY) {
1a67a97c 1118 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1119 }
1120 else {
1121 dTOPss;
44f8325f 1122 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1123 int flip = 0;
790090df 1124
bfed75c6 1125 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1126 if (GvIO(PL_last_in_gv)) {
1127 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1128 }
1129 else {
fafc274c 1130 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1131 if (gv && GvSV(gv))
1132 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1133 }
bfed75c6
AL
1134 } else {
1135 flip = SvTRUE(sv);
1136 }
1137 if (flip) {
a0d0e21e 1138 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1139 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1140 sv_setiv(targ, 1);
3e3baf6d 1141 SETs(targ);
a0d0e21e
LW
1142 RETURN;
1143 }
1144 else {
1145 sv_setiv(targ, 0);
924508f0 1146 SP--;
1a67a97c 1147 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1148 }
1149 }
76f68e9b 1150 sv_setpvs(TARG, "");
a0d0e21e
LW
1151 SETs(targ);
1152 RETURN;
1153 }
1154}
1155
8e9bbdb9
RGS
1156/* This code tries to decide if "$left .. $right" should use the
1157 magical string increment, or if the range is numeric (we make
1158 an exception for .."0" [#18165]). AMS 20021031. */
1159
1160#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1161 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1162 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1163 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1164 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1165 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1166
a0d0e21e
LW
1167PP(pp_flop)
1168{
20b7effb 1169 dSP;
a0d0e21e 1170
82334630 1171 if (GIMME_V == G_ARRAY) {
a0d0e21e 1172 dPOPPOPssrl;
86cb7173 1173
5b295bef
RD
1174 SvGETMAGIC(left);
1175 SvGETMAGIC(right);
a0d0e21e 1176
8e9bbdb9 1177 if (RANGE_IS_NUMERIC(left,right)) {
b262c4c9 1178 IV i, j, n;
4d91eccc
FC
1179 if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) ||
1180 (SvOK(right) && (SvIOK(right)
1181 ? SvIsUV(right) && SvUV(right) > IV_MAX
1182 : SvNV_nomg(right) > IV_MAX)))
d470f89e 1183 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad 1184 i = SvIV_nomg(left);
b262c4c9
JH
1185 j = SvIV_nomg(right);
1186 if (j >= i) {
1187 /* Dance carefully around signed max. */
1188 bool overflow = (i <= 0 && j > SSize_t_MAX + i - 1);
1189 if (!overflow) {
1190 n = j - i + 1;
1191 /* The wraparound of signed integers is undefined
1192 * behavior, but here we aim for count >=1, and
1193 * negative count is just wrong. */
a1e27170
TC
1194 if (n < 1
1195#if IVSIZE > Size_t_size
1196 || n > SSize_t_MAX
1197#endif
1198 )
b262c4c9
JH
1199 overflow = TRUE;
1200 }
1201 if (overflow)
1202 Perl_croak(aTHX_ "Out of memory during list extend");
1203 EXTEND_MORTAL(n);
1204 EXTEND(SP, n);
bbce6d69 1205 }
c1ab3db2 1206 else
b262c4c9
JH
1207 n = 0;
1208 while (n--) {
fc01cab4 1209 SV * const sv = sv_2mortal(newSViv(i));
a0d0e21e 1210 PUSHs(sv);
fc01cab4
DM
1211 if (n) /* avoid incrementing above IV_MAX */
1212 i++;
a0d0e21e
LW
1213 }
1214 }
1215 else {
3c323193
FC
1216 STRLEN len, llen;
1217 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1218 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1219
3c323193 1220 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1221 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1222 XPUSHs(sv);
b15aece3 1223 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1224 break;
a0d0e21e
LW
1225 sv = sv_2mortal(newSVsv(sv));
1226 sv_inc(sv);
1227 }
a0d0e21e
LW
1228 }
1229 }
1230 else {
1231 dTOPss;
901017d6 1232 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1233 int flop = 0;
a0d0e21e 1234 sv_inc(targ);
4e3399f9
YST
1235
1236 if (PL_op->op_private & OPpFLIP_LINENUM) {
1237 if (GvIO(PL_last_in_gv)) {
1238 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1239 }
1240 else {
fafc274c 1241 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1242 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1243 }
1244 }
1245 else {
1246 flop = SvTRUE(sv);
1247 }
1248
1249 if (flop) {
a0d0e21e 1250 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1251 sv_catpvs(targ, "E0");
a0d0e21e
LW
1252 }
1253 SETs(targ);
1254 }
1255
1256 RETURN;
1257}
1258
1259/* Control. */
1260
27da23d5 1261static const char * const context_name[] = {
515afda2 1262 "pseudo-block",
f31522f3 1263 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1264 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1265 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1266 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1267 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1268 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1269 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1270 "subroutine",
76753e7f 1271 "format",
515afda2 1272 "eval",
515afda2 1273 "substitution",
515afda2
NC
1274};
1275
76e3520e 1276STATIC I32
5db1eb8d 1277S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1278{
eb578fdb 1279 I32 i;
a0d0e21e 1280
7918f24d
NC
1281 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1282
a0d0e21e 1283 for (i = cxstack_ix; i >= 0; i--) {
eb578fdb 1284 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1285 switch (CxTYPE(cx)) {
a0d0e21e 1286 case CXt_SUBST:
a0d0e21e 1287 case CXt_SUB:
7766f137 1288 case CXt_FORMAT:
a0d0e21e 1289 case CXt_EVAL:
0a753a76 1290 case CXt_NULL:
dcbac5bb 1291 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1292 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1293 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1294 if (CxTYPE(cx) == CXt_NULL)
1295 return -1;
1296 break;
c6fdafd0 1297 case CXt_LOOP_LAZYIV:
d01136d6 1298 case CXt_LOOP_LAZYSV:
3b719c58
NC
1299 case CXt_LOOP_FOR:
1300 case CXt_LOOP_PLAIN:
7e8f1eac 1301 {
5db1eb8d
BF
1302 STRLEN cx_label_len = 0;
1303 U32 cx_label_flags = 0;
1304 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1305 if (!cx_label || !(
1306 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1307 (flags & SVf_UTF8)
1308 ? (bytes_cmp_utf8(
1309 (const U8*)cx_label, cx_label_len,
1310 (const U8*)label, len) == 0)
1311 : (bytes_cmp_utf8(
1312 (const U8*)label, len,
1313 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF
1314 : (len == cx_label_len && ((cx_label == label)
1315 || memEQ(cx_label, label, len))) )) {
1c98cc53 1316 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1317 (long)i, cx_label));
a0d0e21e
LW
1318 continue;
1319 }
1c98cc53 1320 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1321 return i;
7e8f1eac 1322 }
a0d0e21e
LW
1323 }
1324 }
1325 return i;
1326}
1327
0d863452
RH
1328
1329
e50aee73 1330I32
864dbfa3 1331Perl_dowantarray(pTHX)
e50aee73 1332{
f54cb97a 1333 const I32 gimme = block_gimme();
54310121
PP
1334 return (gimme == G_VOID) ? G_SCALAR : gimme;
1335}
1336
1337I32
864dbfa3 1338Perl_block_gimme(pTHX)
54310121 1339{
06b5626a 1340 const I32 cxix = dopoptosub(cxstack_ix);
a05700a8 1341 U8 gimme;
e50aee73 1342 if (cxix < 0)
46fc3d4c 1343 return G_VOID;
e50aee73 1344
a05700a8
DM
1345 gimme = (cxstack[cxix].blk_gimme & G_WANT);
1346 if (!gimme)
1347 Perl_croak(aTHX_ "panic: bad gimme: %d\n", gimme);
1348 return gimme;
e50aee73
AD
1349}
1350
a05700a8 1351
78f9721b
SM
1352I32
1353Perl_is_lvalue_sub(pTHX)
1354{
06b5626a 1355 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1356 assert(cxix >= 0); /* We should only be called from inside subs */
1357
bafb2adc
NC
1358 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1359 return CxLVAL(cxstack + cxix);
78f9721b
SM
1360 else
1361 return 0;
1362}
1363
777d9014
FC
1364/* only used by PUSHSUB */
1365I32
1366Perl_was_lvalue_sub(pTHX)
1367{
777d9014
FC
1368 const I32 cxix = dopoptosub(cxstack_ix-1);
1369 assert(cxix >= 0); /* We should only be called from inside subs */
1370
1371 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1372 return CxLVAL(cxstack + cxix);
1373 else
1374 return 0;
1375}
1376
76e3520e 1377STATIC I32
901017d6 1378S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1379{
a0d0e21e 1380 I32 i;
7918f24d
NC
1381
1382 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
81611534
JH
1383#ifndef DEBUGGING
1384 PERL_UNUSED_CONTEXT;
1385#endif
7918f24d 1386
a0d0e21e 1387 for (i = startingblock; i >= 0; i--) {
eb578fdb 1388 const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1389 switch (CxTYPE(cx)) {
a0d0e21e
LW
1390 default:
1391 continue;
a0d0e21e 1392 case CXt_SUB:
5fbe8311
DM
1393 /* in sub foo { /(?{...})/ }, foo ends up on the CX stack
1394 * twice; the first for the normal foo() call, and the second
1395 * for a faked up re-entry into the sub to execute the
1396 * code block. Hide this faked entry from the world. */
1397 if (cx->cx_type & CXp_SUB_RE_FAKE)
1398 continue;
c67159e1 1399 /* FALLTHROUGH */
5fbe8311 1400 case CXt_EVAL:
7766f137 1401 case CXt_FORMAT:
1c98cc53 1402 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW
1403 return i;
1404 }
1405 }
1406 return i;
1407}
1408
76e3520e 1409STATIC I32
cea2e8a9 1410S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e
LW
1411{
1412 I32 i;
a0d0e21e 1413 for (i = startingblock; i >= 0; i--) {
eb578fdb 1414 const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1415 switch (CxTYPE(cx)) {
a0d0e21e
LW
1416 default:
1417 continue;
1418 case CXt_EVAL:
1c98cc53 1419 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW
1420 return i;
1421 }
1422 }
1423 return i;
1424}
1425
76e3520e 1426STATIC I32
cea2e8a9 1427S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e
LW
1428{
1429 I32 i;
a0d0e21e 1430 for (i = startingblock; i >= 0; i--) {
eb578fdb 1431 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1432 switch (CxTYPE(cx)) {
a0d0e21e 1433 case CXt_SUBST:
a0d0e21e 1434 case CXt_SUB:
7766f137 1435 case CXt_FORMAT:
a0d0e21e 1436 case CXt_EVAL:
0a753a76 1437 case CXt_NULL:
dcbac5bb 1438 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1439 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1440 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1441 if ((CxTYPE(cx)) == CXt_NULL)
1442 return -1;
1443 break;
c6fdafd0 1444 case CXt_LOOP_LAZYIV:
d01136d6 1445 case CXt_LOOP_LAZYSV:
3b719c58
NC
1446 case CXt_LOOP_FOR:
1447 case CXt_LOOP_PLAIN:
1c98cc53 1448 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW
1449 return i;
1450 }
1451 }
1452 return i;
1453}
1454
0d863452
RH
1455STATIC I32
1456S_dopoptogiven(pTHX_ I32 startingblock)
1457{
1458 I32 i;
1459 for (i = startingblock; i >= 0; i--) {
eb578fdb 1460 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH
1461 switch (CxTYPE(cx)) {
1462 default:
1463 continue;
1464 case CXt_GIVEN:
1c98cc53 1465 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1466 return i;
3b719c58
NC
1467 case CXt_LOOP_PLAIN:
1468 assert(!CxFOREACHDEF(cx));
1469 break;
c6fdafd0 1470 case CXt_LOOP_LAZYIV:
d01136d6 1471 case CXt_LOOP_LAZYSV:
3b719c58 1472 case CXt_LOOP_FOR:
0d863452 1473 if (CxFOREACHDEF(cx)) {
1c98cc53 1474 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH
1475 return i;
1476 }
1477 }
1478 }
1479 return i;
1480}
1481
1482STATIC I32
1483S_dopoptowhen(pTHX_ I32 startingblock)
1484{
1485 I32 i;
1486 for (i = startingblock; i >= 0; i--) {
eb578fdb 1487 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH
1488 switch (CxTYPE(cx)) {
1489 default:
1490 continue;
1491 case CXt_WHEN:
1c98cc53 1492 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH
1493 return i;
1494 }
1495 }
1496 return i;
1497}
1498
a0d0e21e 1499void
864dbfa3 1500Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1501{
a0d0e21e
LW
1502 I32 optype;
1503
f144f1e3
DM
1504 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1505 return;
1506
a0d0e21e 1507 while (cxstack_ix > cxix) {
b0d9ce38 1508 SV *sv;
eb578fdb 1509 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1510 DEBUG_CX("UNWIND"); \
a0d0e21e 1511 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1512 switch (CxTYPE(cx)) {
c90c0ff4
PP
1513 case CXt_SUBST:
1514 POPSUBST(cx);
1515 continue; /* not break */
a0d0e21e 1516 case CXt_SUB:
b0d9ce38
GS
1517 POPSUB(cx,sv);
1518 LEAVESUB(sv);
a0d0e21e
LW
1519 break;
1520 case CXt_EVAL:
1521 POPEVAL(cx);
1522 break;
c6fdafd0 1523 case CXt_LOOP_LAZYIV:
d01136d6 1524 case CXt_LOOP_LAZYSV:
3b719c58
NC
1525 case CXt_LOOP_FOR:
1526 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1527 POPLOOP(cx);
1528 break;
0a753a76 1529 case CXt_NULL:
a0d0e21e 1530 break;
7766f137
GS
1531 case CXt_FORMAT:
1532 POPFORMAT(cx);
1533 break;
a0d0e21e 1534 }
c90c0ff4 1535 cxstack_ix--;
a0d0e21e 1536 }
1b6737cc 1537 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1538}
1539
5a844595
GS
1540void
1541Perl_qerror(pTHX_ SV *err)
1542{
7918f24d
NC
1543 PERL_ARGS_ASSERT_QERROR;
1544
6b2fb389
DM
1545 if (PL_in_eval) {
1546 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1547 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1548 SVfARG(err));
6b2fb389
DM
1549 }
1550 else
1551 sv_catsv(ERRSV, err);
1552 }
5a844595
GS
1553 else if (PL_errors)
1554 sv_catsv(PL_errors, err);
1555 else
be2597df 1556 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1557 if (PL_parser)
1558 ++PL_parser->error_count;
5a844595
GS
1559}
1560
bb4c52e0 1561void
c5df3096 1562Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1563{
c5df3096 1564 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1565 U8 in_eval = PL_in_eval;
c5df3096 1566 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1567
96d9b9cd 1568 if (in_eval) {
a0d0e21e 1569 I32 cxix;
a0d0e21e 1570 I32 gimme;
a0d0e21e 1571
22a30693
Z
1572 /*
1573 * Historically, perl used to set ERRSV ($@) early in the die
1574 * process and rely on it not getting clobbered during unwinding.
1575 * That sucked, because it was liable to get clobbered, so the
1576 * setting of ERRSV used to emit the exception from eval{} has
1577 * been moved to much later, after unwinding (see just before
1578 * JMPENV_JUMP below). However, some modules were relying on the
1579 * early setting, by examining $@ during unwinding to use it as
1580 * a flag indicating whether the current unwinding was caused by
1581 * an exception. It was never a reliable flag for that purpose,
1582 * being totally open to false positives even without actual
1583 * clobberage, but was useful enough for production code to
1584 * semantically rely on it.
1585 *
1586 * We'd like to have a proper introspective interface that
1587 * explicitly describes the reason for whatever unwinding
1588 * operations are currently in progress, so that those modules
1589 * work reliably and $@ isn't further overloaded. But we don't
1590 * have one yet. In its absence, as a stopgap measure, ERRSV is
1591 * now *additionally* set here, before unwinding, to serve as the
1592 * (unreliable) flag that it used to.
1593 *
1594 * This behaviour is temporary, and should be removed when a
1595 * proper way to detect exceptional unwinding has been developed.
1596 * As of 2010-12, the authors of modules relying on the hack
1597 * are aware of the issue, because the modules failed on
1598 * perls 5.13.{1..7} which had late setting of $@ without this
1599 * early-setting hack.
1600 */
1601 if (!(in_eval & EVAL_KEEPERR)) {
1602 SvTEMP_off(exceptsv);
1603 sv_setsv(ERRSV, exceptsv);
1604 }
1605
fc941f37
Z
1606 if (in_eval & EVAL_KEEPERR) {
1607 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1608 SVfARG(exceptsv));
1609 }
1610
5a844595
GS
1611 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1612 && PL_curstackinfo->si_prev)
1613 {
bac4b2ad 1614 dounwind(-1);
d3acc0f7 1615 POPSTACK;
bac4b2ad 1616 }
e336de0d 1617
a0d0e21e
LW
1618 if (cxix >= 0) {
1619 I32 optype;
b6494f15 1620 SV *namesv;
eb578fdb 1621 PERL_CONTEXT *cx;
901017d6 1622 SV **newsp;
e32ff4e1 1623#ifdef DEBUGGING
8f89e5a9 1624 COP *oldcop;
20189068 1625#endif
8f89e5a9
Z
1626 JMPENV *restartjmpenv;
1627 OP *restartop;
a0d0e21e
LW
1628
1629 if (cxix < cxstack_ix)
1630 dounwind(cxix);
1631
3280af22 1632 POPBLOCK(cx,PL_curpm);
6b35e009 1633 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1634 STRLEN msglen;
96d9b9cd 1635 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1636 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1637 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1638 my_exit(1);
1639 }
1640 POPEVAL(cx);
b6494f15 1641 namesv = cx->blk_eval.old_namesv;
e32ff4e1 1642#ifdef DEBUGGING
8f89e5a9 1643 oldcop = cx->blk_oldcop;
20189068 1644#endif
8f89e5a9
Z
1645 restartjmpenv = cx->blk_eval.cur_top_env;
1646 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1647
1648 if (gimme == G_SCALAR)
3280af22
NIS
1649 *++newsp = &PL_sv_undef;
1650 PL_stack_sp = newsp;
a0d0e21e
LW
1651
1652 LEAVE;
748a9306 1653
7a2e2cd6 1654 if (optype == OP_REQUIRE) {
e32ff4e1 1655 assert (PL_curcop == oldcop);
b6494f15 1656 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1657 SvPVX_const(namesv),
c60dbbc3 1658 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1659 &PL_sv_undef, 0);
27e90453
DM
1660 /* note that unlike pp_entereval, pp_require isn't
1661 * supposed to trap errors. So now that we've popped the
1662 * EVAL that pp_require pushed, and processed the error
1663 * message, rethrow the error */
ecad31f0
BF
1664 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1665 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1666 SVs_TEMP)));
7a2e2cd6 1667 }
fc941f37 1668 if (!(in_eval & EVAL_KEEPERR))
96d9b9cd 1669 sv_setsv(ERRSV, exceptsv);
8f89e5a9
Z
1670 PL_restartjmpenv = restartjmpenv;
1671 PL_restartop = restartop;
bb4c52e0 1672 JMPENV_JUMP(3);
e5964223 1673 NOT_REACHED; /* NOTREACHED */
a0d0e21e
LW
1674 }
1675 }
87582a92 1676
96d9b9cd 1677 write_to_stderr(exceptsv);
f86702cc 1678 my_failure_exit();
e5964223 1679 NOT_REACHED; /* NOTREACHED */
a0d0e21e
LW
1680}
1681
1682PP(pp_xor)
1683{
20b7effb 1684 dSP; dPOPTOPssrl;
a0d0e21e
LW
1685 if (SvTRUE(left) != SvTRUE(right))
1686 RETSETYES;
1687 else
1688 RETSETNO;
1689}
1690
8dff4fc5 1691/*
dcccc8ff
KW
1692
1693=head1 CV Manipulation Functions
1694
8dff4fc5
BM
1695=for apidoc caller_cx
1696
72d33970 1697The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
8dff4fc5 1698returned C<PERL_CONTEXT> structure can be interrogated to find all the
72d33970 1699information returned to Perl by C<caller>. Note that XSUBs don't get a
8dff4fc5
BM
1700stack frame, so C<caller_cx(0, NULL)> will return information for the
1701immediately-surrounding Perl code.
1702
1703This function skips over the automatic calls to C<&DB::sub> made on the
72d33970 1704behalf of the debugger. If the stack frame requested was a sub called by
8dff4fc5
BM
1705C<DB::sub>, the return value will be the frame for the call to
1706C<DB::sub>, since that has the correct line number/etc. for the call
72d33970 1707site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
8dff4fc5
BM
1708frame for the sub call itself.
1709
1710=cut
1711*/
1712
1713const PERL_CONTEXT *
1714Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1715{
eb578fdb
KW
1716 I32 cxix = dopoptosub(cxstack_ix);
1717 const PERL_CONTEXT *cx;
1718 const PERL_CONTEXT *ccstack = cxstack;
901017d6 1719 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1720
a0d0e21e 1721 for (;;) {
2c375eb9
GS
1722 /* we may be in a higher stacklevel, so dig down deeper */
1723 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1724 top_si = top_si->si_prev;
1725 ccstack = top_si->si_cxstack;
1726 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1727 }
8dff4fc5
BM
1728 if (cxix < 0)
1729 return NULL;
f2a7f298 1730 /* caller() should not report the automatic calls to &DB::sub */
1731 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1732 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1733 count++;
1734 if (!count--)
1735 break;
2c375eb9 1736 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1737 }
2c375eb9
GS
1738
1739 cx = &ccstack[cxix];
8dff4fc5
BM
1740 if (dbcxp) *dbcxp = cx;
1741
7766f137 1742 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1743 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1744 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1745 field below is defined for any cx. */
f2a7f298 1746 /* caller() should not report the automatic calls to &DB::sub */
1747 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1748 cx = &ccstack[dbcxix];
06a5b730
PP
1749 }
1750
8dff4fc5
BM
1751 return cx;
1752}
1753
1754PP(pp_caller)
1755{
8dff4fc5 1756 dSP;
eb578fdb 1757 const PERL_CONTEXT *cx;
8dff4fc5 1758 const PERL_CONTEXT *dbcx;
48ebc325 1759 I32 gimme = GIMME_V;
d527ce7c 1760 const HEK *stash_hek;
8dff4fc5 1761 I32 count = 0;
ce0b554b 1762 bool has_arg = MAXARG && TOPs;
25502127 1763 const COP *lcop;
8dff4fc5 1764
ce0b554b
FC
1765 if (MAXARG) {
1766 if (has_arg)
8dff4fc5 1767 count = POPi;
ce0b554b
FC
1768 else (void)POPs;
1769 }
8dff4fc5 1770
ce0b554b 1771 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5 1772 if (!cx) {
48ebc325 1773 if (gimme != G_ARRAY) {
8dff4fc5
BM
1774 EXTEND(SP, 1);
1775 RETPUSHUNDEF;
1776 }
1777 RETURN;
1778 }
1779
fb55feef 1780 DEBUG_CX("CALLER");
d0279c7c 1781 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC
1782 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1783 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1784 : NULL;
48ebc325 1785 if (gimme != G_ARRAY) {
27d41816 1786 EXTEND(SP, 1);
d527ce7c 1787 if (!stash_hek)
3280af22 1788 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1789 else {
1790 dTARGET;
d527ce7c 1791 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1792 PUSHs(TARG);
1793 }
a0d0e21e
LW
1794 RETURN;
1795 }
a0d0e21e 1796
b3ca2e83 1797 EXTEND(SP, 11);
27d41816 1798
d527ce7c 1799 if (!stash_hek)
3280af22 1800 PUSHs(&PL_sv_undef);
d527ce7c
BF
1801 else {
1802 dTARGET;
1803 sv_sethek(TARG, stash_hek);
1804 PUSHTARG;
1805 }
6e449a3a 1806 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
e6dae479 1807 lcop = closest_cop(cx->blk_oldcop, OpSIBLING(cx->blk_oldcop),
25502127
FC
1808 cx->blk_sub.retop, TRUE);
1809 if (!lcop)
1810 lcop = cx->blk_oldcop;
e9e9e546 1811 mPUSHu(CopLINE(lcop));
ce0b554b 1812 if (!has_arg)
a0d0e21e 1813 RETURN;
7766f137
GS
1814 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1815 /* So is ccstack[dbcxix]. */
a5f47741 1816 if (CvHASGV(dbcx->blk_sub.cv)) {
ecf05a58 1817 PUSHs(cv_name(dbcx->blk_sub.cv, 0, 0));
bf38a478 1818 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1819 }
1820 else {
84bafc02 1821 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1822 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1823 }
a0d0e21e
LW
1824 }
1825 else {
84bafc02 1826 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1827 mPUSHi(0);
a0d0e21e 1828 }
54310121
PP
1829 gimme = (I32)cx->blk_gimme;
1830 if (gimme == G_VOID)
3280af22 1831 PUSHs(&PL_sv_undef);
54310121 1832 else
98625aca 1833 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1834 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1835 /* eval STRING */
85a64632 1836 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
78beb4ca
TC
1837 SV *cur_text = cx->blk_eval.cur_text;
1838 if (SvCUR(cur_text) >= 2) {
1839 PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2,
1840 SvUTF8(cur_text)|SVs_TEMP));
1841 }
1842 else {
1843 /* I think this is will always be "", but be sure */
1844 PUSHs(sv_2mortal(newSVsv(cur_text)));
1845 }
1846
3280af22 1847 PUSHs(&PL_sv_no);
0f79a09d 1848 }
811a4de9 1849 /* require */
0f79a09d 1850 else if (cx->blk_eval.old_namesv) {
6e449a3a 1851 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1852 PUSHs(&PL_sv_yes);
06a5b730 1853 }
811a4de9
GS
1854 /* eval BLOCK (try blocks have old_namesv == 0) */
1855 else {
1856 PUSHs(&PL_sv_undef);
1857 PUSHs(&PL_sv_undef);
1858 }
4633a7c4 1859 }
a682de96
GS
1860 else {
1861 PUSHs(&PL_sv_undef);
1862 PUSHs(&PL_sv_undef);
1863 }
bafb2adc 1864 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1865 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1866 {
66a1b24b 1867 AV * const ary = cx->blk_sub.argarray;
c70927a6 1868 const SSize_t off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1869
e1a80902 1870 Perl_init_dbargs(aTHX);
a0d0e21e 1871
3280af22
NIS
1872 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1873 av_extend(PL_dbargs, AvFILLp(ary) + off);
1874 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1875 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1876 }
6e449a3a 1877 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1878 {
1879 SV * mask ;
72dc9ed5 1880 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1881
f07626ad 1882 if (old_warnings == pWARN_NONE)
e476b1b5 1883 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
f07626ad
FC
1884 else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0)
1885 mask = &PL_sv_undef ;
ac27b0f5 1886 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1887 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1888 /* Get the bit mask for $warnings::Bits{all}, because
1889 * it could have been extended by warnings::register */
1890 SV **bits_all;
6673a63c 1891 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1892 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1893 mask = newSVsv(*bits_all);
1894 }
1895 else {
1896 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1897 }
1898 }
e476b1b5 1899 else
72dc9ed5 1900 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1901 mPUSHs(mask);
e476b1b5 1902 }
b3ca2e83 1903
c28fe1ec 1904 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1905 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1906 : &PL_sv_undef);
a0d0e21e
LW
1907 RETURN;
1908}
1909
a0d0e21e
LW
1910PP(pp_reset)
1911{
39644a26 1912 dSP;
ca826051
FC
1913 const char * tmps;
1914 STRLEN len = 0;
1915 if (MAXARG < 1 || (!TOPs && !POPs))
1916 tmps = NULL, len = 0;
1917 else
1918 tmps = SvPVx_const(POPs, len);
1919 sv_resetpvn(tmps, len, CopSTASH(PL_curcop));
3280af22 1920 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1921 RETURN;
1922}
1923
dd2155a4
DM
1924/* like pp_nextstate, but used instead when the debugger is active */
1925
a0d0e21e
LW
1926PP(pp_dbstate)
1927{
533c011a 1928 PL_curcop = (COP*)PL_op;
a0d0e21e 1929 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1930 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1931 FREETMPS;
1932
f410a211
NC
1933 PERL_ASYNC_CHECK();
1934
88df5f01 1935 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
a6d69523 1936 || PL_DBsingle_iv || PL_DBsignal_iv || PL_DBtrace_iv)
a0d0e21e 1937 {
39644a26 1938 dSP;
eb578fdb 1939 PERL_CONTEXT *cx;
f54cb97a 1940 const I32 gimme = G_ARRAY;
eb160463 1941 U8 hasargs;
0bd48802 1942 GV * const gv = PL_DBgv;
432d4561
JL
1943 CV * cv = NULL;
1944
1945 if (gv && isGV_with_GP(gv))
1946 cv = GvCV(gv);
a0d0e21e 1947
c2cb6f77 1948 if (!cv || (!CvROOT(cv) && !CvXSUB(cv)))
cea2e8a9 1949 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1950
aea4f609
DM
1951 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1952 /* don't do recursive DB::DB call */
a0d0e21e 1953 return NORMAL;
748a9306 1954
a57c6685 1955 ENTER;
4633a7c4
LW
1956 SAVETMPS;
1957
3280af22 1958 SAVEI32(PL_debug);
55497cff 1959 SAVESTACK_POS();
3280af22 1960 PL_debug = 0;
748a9306 1961 hasargs = 0;
924508f0 1962 SPAGAIN;
748a9306 1963
aed2304a 1964 if (CvISXSUB(cv)) {
c127bd3a
SF
1965 PUSHMARK(SP);
1966 (void)(*CvXSUB(cv))(aTHX_ cv);
c127bd3a 1967 FREETMPS;
a57c6685 1968 LEAVE;
c127bd3a
SF
1969 return NORMAL;
1970 }
1971 else {
1972 PUSHBLOCK(cx, CXt_SUB, SP);
1973 PUSHSUB_DB(cx);
1974 cx->blk_sub.retop = PL_op->op_next;
1975 CvDEPTH(cv)++;
9d976ff5
FC
1976 if (CvDEPTH(cv) >= 2) {
1977 PERL_STACK_OVERFLOW_CHECK();
1978 pad_push(CvPADLIST(cv), CvDEPTH(cv));
1979 }
9d976ff5 1980 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv));
c127bd3a
SF
1981 RETURNOP(CvSTART(cv));
1982 }
a0d0e21e
LW
1983 }
1984 else
1985 return NORMAL;
1986}
1987
2fc507dc
FC
1988/* S_leave_common: Common code that many functions in this file use on
1989 scope exit. */
1990
2ec7f6f2
FC
1991/* SVs on the stack that have any of the flags passed in are left as is.
1992 Other SVs are protected via the mortals stack if lvalue is true, and
2fc507dc
FC
1993 copied otherwise.
1994
1995 Also, taintedness is cleared.
1996*/
2ec7f6f2 1997
b9d76716 1998STATIC SV **
2fc507dc 1999S_leave_common(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme,
2ec7f6f2 2000 U32 flags, bool lvalue)
b9d76716 2001{
9a214eec 2002 bool padtmp = 0;
2fc507dc 2003 PERL_ARGS_ASSERT_LEAVE_COMMON;
b9d76716 2004
80dd201b 2005 TAINT_NOT;
9a214eec
DM
2006 if (flags & SVs_PADTMP) {
2007 flags &= ~SVs_PADTMP;
2008 padtmp = 1;
2009 }
b9d76716
VP
2010 if (gimme == G_SCALAR) {
2011 if (MARK < SP)
9a214eec 2012 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2ec7f6f2
FC
2013 ? *SP
2014 : lvalue
2015 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2016 : sv_mortalcopy(*SP);
b9d76716
VP
2017 else {
2018 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2019 MARK = newsp;
2020 MEXTEND(MARK, 1);
2021 *++MARK = &PL_sv_undef;
2022 return MARK;
2023 }
2024 }
2025 else if (gimme == G_ARRAY) {
2026 /* in case LEAVE wipes old return values */
2027 while (++MARK <= SP) {
9a214eec 2028 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP
2029 *++newsp = *MARK;
2030 else {
2ec7f6f2
FC
2031 *++newsp = lvalue
2032 ? sv_2mortal(SvREFCNT_inc_simple_NN(*MARK))
2033 : sv_mortalcopy(*MARK);
b9d76716
VP
2034 TAINT_NOT; /* Each item is independent */
2035 }
2036 }
2037 /* When this function was called with MARK == newsp, we reach this
2038 * point with SP == newsp. */
2039 }
2040
2041 return newsp;
2042}
2043
2b9a6457
VP
2044PP(pp_enter)
2045{
20b7effb 2046 dSP;
eb578fdb 2047 PERL_CONTEXT *cx;
7c2d9d03 2048 I32 gimme = GIMME_V;
2b9a6457
VP
2049
2050 ENTER_with_name("block");
2051
2052 SAVETMPS;
2053 PUSHBLOCK(cx, CXt_BLOCK, SP);
2054
2055 RETURN;
2056}
2057
2058PP(pp_leave)
2059{
20b7effb 2060 dSP;
eb578fdb 2061 PERL_CONTEXT *cx;
2b9a6457
VP
2062 SV **newsp;
2063 PMOP *newpm;
2064 I32 gimme;
2065
2066 if (PL_op->op_flags & OPf_SPECIAL) {
2067 cx = &cxstack[cxstack_ix];
2068 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2069 }
2070
2071 POPBLOCK(cx,newpm);
2072
2073 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2074
2fc507dc 2075 SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP,
2ec7f6f2 2076 PL_op->op_private & OPpLVALUE);
2b9a6457
VP
2077 PL_curpm = newpm; /* Don't pop $1 et al till now */
2078
2079 LEAVE_with_name("block");
2080
2081 RETURN;
2082}
2083
eaa9f768
JH
2084static bool
2085S_outside_integer(pTHX_ SV *sv)
2086{
2087 if (SvOK(sv)) {
2088 const NV nv = SvNV_nomg(sv);
415b66b2
JH
2089 if (Perl_isinfnan(nv))
2090 return TRUE;
eaa9f768
JH
2091#ifdef NV_PRESERVES_UV
2092 if (nv < (NV)IV_MIN || nv > (NV)IV_MAX)
2093 return TRUE;
2094#else
2095 if (nv <= (NV)IV_MIN)
2096 return TRUE;
2097 if ((nv > 0) &&
2098 ((nv > (NV)UV_MAX ||
2099 SvUV_nomg(sv) > (UV)IV_MAX)))
2100 return TRUE;
2101#endif
2102 }
2103 return FALSE;
2104}
2105
a0d0e21e
LW
2106PP(pp_enteriter)
2107{
20b7effb 2108 dSP; dMARK;
eb578fdb 2109 PERL_CONTEXT *cx;
f54cb97a 2110 const I32 gimme = GIMME_V;
df530c37 2111 void *itervar; /* location of the iteration variable */
840fe433 2112 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2113
d343c3ef 2114 ENTER_with_name("loop1");
4633a7c4
LW
2115 SAVETMPS;
2116
aafca525
DM
2117 if (PL_op->op_targ) { /* "my" variable */
2118 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2119 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2120 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2121 SVs_PADSTALE, SVs_PADSTALE);
2122 }
09edbca0 2123 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
aafca525 2124 itervar = &PAD_SVl(PL_op->op_targ);
54b9620d 2125 }
d39c26a6 2126 else if (LIKELY(isGV(TOPs))) { /* symbol table variable */
159b6efe 2127 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2128 SV** svp = &GvSV(gv);
2129 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2130 *svp = newSV(0);
df530c37 2131 itervar = (void *)gv;
54b9620d 2132 }
d39c26a6
FC
2133 else {
2134 SV * const sv = POPs;
2135 assert(SvTYPE(sv) == SVt_PVMG);
2136 assert(SvMAGIC(sv));
2137 assert(SvMAGIC(sv)->mg_type == PERL_MAGIC_lvref);
2138 itervar = (void *)sv;
2139 cxtype |= CXp_FOR_LVREF;
2140 }
4633a7c4 2141
0d863452
RH
2142 if (PL_op->op_private & OPpITER_DEF)
2143 cxtype |= CXp_FOR_DEF;
2144
d343c3ef 2145 ENTER_with_name("loop2");
a0d0e21e 2146
7766f137 2147 PUSHBLOCK(cx, cxtype, SP);
df530c37 2148 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2149 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2150 SV *maybe_ary = POPs;
2151 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2152 dPOPss;
d01136d6 2153 SV * const right = maybe_ary;
d39c26a6
FC
2154 if (UNLIKELY(cxtype & CXp_FOR_LVREF))
2155 DIE(aTHX_ "Assigned value is not a reference");
984a4bea
RD
2156 SvGETMAGIC(sv);
2157 SvGETMAGIC(right);
4fe3f0fa 2158 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2159 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2160 cx->cx_type |= CXt_LOOP_LAZYIV;
2161 /* Make sure that no-one re-orders cop.h and breaks our
2162 assumptions */
2163 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
eaa9f768
JH
2164 if (S_outside_integer(aTHX_ sv) ||
2165 S_outside_integer(aTHX_ right))
076d9a11 2166 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2167 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2168 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2169#ifdef DEBUGGING
2170 /* for correct -Dstv display */
2171 cx->blk_oldsp = sp - PL_stack_base;
2172#endif
89ea2908 2173 }
3f63a782 2174 else {
d01136d6
BS
2175 cx->cx_type &= ~CXTYPEMASK;
2176 cx->cx_type |= CXt_LOOP_LAZYSV;
2177 /* Make sure that no-one re-orders cop.h and breaks our
2178 assumptions */
2179 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2180 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2181 cx->blk_loop.state_u.lazysv.end = right;
2182 SvREFCNT_inc(right);
2183 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2184 /* This will do the upgrade to SVt_PV, and warn if the value
2185 is uninitialised. */
10516c54 2186 (void) SvPV_nolen_const(right);
267cc4a8
NC
2187 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2188 to replace !SvOK() with a pointer to "". */
2189 if (!SvOK(right)) {
2190 SvREFCNT_dec(right);
d01136d6 2191 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2192 }
3f63a782 2193 }
89ea2908 2194 }
d01136d6 2195 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2196 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2197 SvREFCNT_inc(maybe_ary);
2198 cx->blk_loop.state_u.ary.ix =
2199 (PL_op->op_private & OPpITER_REVERSED) ?
2200 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2201 -1;
ef3e5ea9 2202 }
89ea2908 2203 }
d01136d6
BS
2204 else { /* iterating over items on the stack */
2205 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2206 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2207 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2208 }
2209 else {
d01136d6 2210 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2211 }
4633a7c4 2212 }
a0d0e21e
LW
2213
2214 RETURN;
2215}
2216
2217PP(pp_enterloop)
2218{
20b7effb 2219 dSP;
eb578fdb 2220 PERL_CONTEXT *cx;
f54cb97a 2221 const I32 gimme = GIMME_V;
a0d0e21e 2222
d343c3ef 2223 ENTER_with_name("loop1");
a0d0e21e 2224 SAVETMPS;
d343c3ef 2225 ENTER_with_name("loop2");
a0d0e21e 2226
3b719c58
NC
2227 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2228 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2229
2230 RETURN;
2231}
2232
2233PP(pp_leaveloop)
2234{
20b7effb 2235 dSP;
eb578fdb 2236 PERL_CONTEXT *cx;
a0d0e21e
LW
2237 I32 gimme;
2238 SV **newsp;
2239 PMOP *newpm;
2240 SV **mark;
2241
2242 POPBLOCK(cx,newpm);
3b719c58 2243 assert(CxTYPE_is_LOOP(cx));
4fdae800 2244 mark = newsp;
a8bba7fa 2245 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2246
2fc507dc 2247 SP = leave_common(newsp, SP, MARK, gimme, 0,
a373464f 2248 PL_op->op_private & OPpLVALUE);
f86702cc
PP
2249 PUTBACK;
2250
a8bba7fa 2251 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2252 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2253
d343c3ef
GG
2254 LEAVE_with_name("loop2");
2255 LEAVE_with_name("loop1");
a0d0e21e 2256
f86702cc 2257 return NORMAL;
a0d0e21e
LW
2258}
2259
31ccb4f5
DM
2260
2261/* This duplicates most of pp_leavesub, but with additional code to handle
2262 * return args in lvalue context. It was forked from pp_leavesub to
2263 * avoid slowing down that function any further.
2264 *
2265 * Any changes made to this function may need to be copied to pp_leavesub
2266 * and vice-versa.
57486a97
DM
2267 */
2268
31ccb4f5 2269PP(pp_leavesublv)
3bdf583b 2270{
57486a97
DM
2271 dSP;
2272 SV **newsp;
2273 SV **mark;
2274 PMOP *newpm;
2275 I32 gimme;
2276 PERL_CONTEXT *cx;
2277 SV *sv;
2278 bool ref;
a8fc6464 2279 const char *what = NULL;
57486a97 2280
1f0ba93b
DM
2281 if (CxMULTICALL(&cxstack[cxstack_ix])) {
2282 /* entry zero of a stack is always PL_sv_undef, which
2283 * simplifies converting a '()' return into undef in scalar context */
2284 assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef);
85ecf147 2285 return 0;
1f0ba93b 2286 }
85ecf147 2287
57486a97
DM
2288 POPBLOCK(cx,newpm);
2289 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
2290 TAINT_NOT;
2291
e80c4acf 2292 mark = newsp + 1;
57486a97
DM
2293
2294 ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2295 if (gimme == G_SCALAR) {
d25b0d7b
FC
2296 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2297 SV *sv;
e80c4acf
DM
2298 if (MARK <= SP) {
2299 assert(MARK == SP);
3885a45a 2300 if ((SvPADTMP(TOPs) || SvREADONLY(TOPs)) &&
d25b0d7b 2301 !SvSMAGICAL(TOPs)) {
001de122 2302 what =
d25b0d7b 2303 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2304 : "a readonly value" : "a temporary";
d25b0d7b 2305 }
001de122 2306 else goto copy_sv;
d25b0d7b
FC
2307 }
2308 else {
2309 /* sub:lvalue{} will take us here. */
001de122 2310 what = "undef";
d25b0d7b 2311 }
a8fc6464 2312 croak:
001de122 2313 LEAVE;
001de122 2314 POPSUB(cx,sv);
716436dc 2315 cxstack_ix--;
001de122
FC
2316 PL_curpm = newpm;
2317 LEAVESUB(sv);
2318 Perl_croak(aTHX_
2319 "Can't return %s from lvalue subroutine", what
2320 );
d25b0d7b 2321 }
e80c4acf 2322 if (MARK <= SP) {
a5ad7a5a 2323 copy_sv:
3bdf583b 2324 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2325 if (!SvPADTMP(*SP)) {
e80c4acf 2326 *MARK = SvREFCNT_inc(*SP);
3bdf583b 2327 FREETMPS;
e80c4acf 2328 sv_2mortal(*MARK);
5811c07e
FC
2329 }
2330 else {
2331 /* FREETMPS could clobber it */
2332 SV *sv = SvREFCNT_inc(*SP);
2333 FREETMPS;
e80c4acf 2334 *MARK = sv_mortalcopy(sv);
5811c07e
FC
2335 SvREFCNT_dec(sv);
2336 }
3bdf583b
FC
2337 }
2338 else
e80c4acf 2339 *MARK =
5811c07e
FC
2340 SvPADTMP(*SP)
2341 ? sv_mortalcopy(*SP)
2342 : !SvTEMP(*SP)
e08be60b
FC
2343 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2344 : *SP;
3bdf583b 2345 }
0d235c77 2346 else {
e80c4acf
DM
2347 MEXTEND(MARK, 0);
2348 *MARK = &PL_sv_undef;
0d235c77 2349 }
e80c4acf
DM
2350 SP = MARK;
2351
0e9700df 2352 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2353 SvGETMAGIC(TOPs);
2354 if (!SvOK(TOPs)) {
0e9700df 2355 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2356 }
2357 }
3bdf583b
FC
2358 }
2359 else if (gimme == G_ARRAY) {
0e9700df 2360 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2361 if (ref || !CxLVAL(cx))
e80c4acf
DM
2362 for (; MARK <= SP; MARK++)
2363 *MARK =
5811c07e 2364 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2365 ? sv_mortalcopy(*MARK)
5811c07e
FC
2366 : SvTEMP(*MARK)
2367 ? *MARK
80422e24 2368 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e80c4acf 2369 else for (; MARK <= SP; MARK++) {
d25b0d7b 2370 if (*MARK != &PL_sv_undef
3885a45a 2371 && (SvPADTMP(*MARK) || SvREADONLY(*MARK))
d25b0d7b 2372 ) {
d25b0d7b 2373 /* Might be flattened array after $#array = */
a8fc6464
DM
2374 what = SvREADONLY(*MARK)
2375 ? "a readonly value" : "a temporary";
2376 goto croak;
d25b0d7b 2377 }
e80c4acf
DM
2378 else if (!SvTEMP(*MARK))
2379 *MARK = sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2380 }
2381 }
e80c4acf 2382 PUTBACK;
57486a97
DM
2383
2384 LEAVE;
716436dc
DM
2385 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2386 cxstack_ix--;
57486a97
DM
2387 PL_curpm = newpm; /* ... and pop $1 et al */
2388 LEAVESUB(sv);
2389
2390 return cx->blk_sub.retop;
3bdf583b
FC
2391}
2392
57486a97 2393
a0d0e21e
LW
2394PP(pp_return)
2395{
20b7effb 2396 dSP; dMARK;
eb578fdb 2397 PERL_CONTEXT *cx;
617a4f41 2398 SV **oldsp;
0bd48802
AL
2399 const I32 cxix = dopoptosub(cxstack_ix);
2400
d40dc6b1
DM
2401 assert(cxstack_ix >= 0);
2402 if (cxix < cxstack_ix) {
2403 if (cxix < 0) {
2404 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2405 * sort block, which is a CXt_NULL
2406 * not a CXt_SUB */
2407 dounwind(0);
2408 /* if we were in list context, we would have to splice out
2409 * any junk before the return args, like we do in the general
2410 * pp_return case, e.g.
2411 * sub f { for (junk1, junk2) { return arg1, arg2 }}
2412 */
2413 assert(cxstack[0].blk_gimme == G_SCALAR);
2414 return 0;
2415 }
2416 else
2417 DIE(aTHX_ "Can't return outside a subroutine");
2418 }
a0d0e21e 2419 dounwind(cxix);
d40dc6b1 2420 }
a0d0e21e 2421
6228a1e1 2422 cx = &cxstack[cxix];
9850bf21 2423
a375ceca
DM
2424 oldsp = PL_stack_base + cx->blk_oldsp;
2425 if (oldsp != MARK) {
2426 /* Handle extra junk on the stack. For example,
2427 * for (1,2) { return 3,4 }
2428 * leaves 1,2,3,4 on the stack. In list context we
2429 * have to splice out the 1,2; In scalar context for
2430 * for (1,2) { return }
2431 * we need to set sp = oldsp so that pp_leavesub knows
2432 * to push &PL_sv_undef onto the stack.
2433 * Note that in pp_return we only do the extra processing
2434 * required to handle junk; everything else we leave to
2435 * pp_leavesub.
2436 */
2437 SSize_t nargs = SP - MARK;
2438 if (nargs) {
2439 if (cx->blk_gimme == G_ARRAY) {
2440 /* shift return args to base of call stack frame */
48344877 2441 Move(MARK + 1, oldsp + 1, nargs, SV*);
a375ceca 2442 PL_stack_sp = oldsp + nargs;
6228a1e1 2443 }
13929c4c 2444 }
a375ceca
DM
2445 else
2446 PL_stack_sp = oldsp;
2447 }
617a4f41
DM
2448
2449 /* fall through to a normal exit */
2450 switch (CxTYPE(cx)) {
2451 case CXt_EVAL:
2452 return CxTRYBLOCK(cx)
2453 ? Perl_pp_leavetry(aTHX)
2454 : Perl_pp_leaveeval(aTHX);
2455 case CXt_SUB:
13929c4c 2456 return CvLVALUE(cx->blk_sub.cv)
31ccb4f5 2457 ? Perl_pp_leavesublv(aTHX)
13929c4c 2458 : Perl_pp_leavesub(aTHX);
7766f137 2459 case CXt_FORMAT:
617a4f41 2460 return Perl_pp_leavewrite(aTHX);
a0d0e21e 2461 default:
5637ef5b 2462 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e 2463 }
a0d0e21e
LW
2464}
2465
4f443c3d 2466
1f039d60
FC
2467static I32
2468S_unwind_loop(pTHX_ const char * const opname)
a0d0e21e 2469{
a0d0e21e 2470 I32 cxix;
1f039d60
FC
2471 if (PL_op->op_flags & OPf_SPECIAL) {
2472 cxix = dopoptoloop(cxstack_ix);
2473 if (cxix < 0)
2474 /* diag_listed_as: Can't "last" outside a loop block */
2475 Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
2476 }
2477 else {
2478 dSP;
2479 STRLEN label_len;
2480 const char * const label =
2481 PL_op->op_flags & OPf_STACKED
2482 ? SvPV(TOPs,label_len)
2483 : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
2484 const U32 label_flags =
2485 PL_op->op_flags & OPf_STACKED
2486 ? SvUTF8(POPs)
2487 : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2488 PUTBACK;
2489 cxix = dopoptolabel(label, label_len, label_flags);
2490 if (cxix < 0)
2491 /* diag_listed_as: Label not found for "last %s" */
2492 Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
2493 opname,
2494 SVfARG(PL_op->op_flags & OPf_STACKED
2495 && !SvGMAGICAL(TOPp1s)
2496 ? TOPp1s
2497 : newSVpvn_flags(label,
2498 label_len,
2499 label_flags | SVs_TEMP)));
2500 }
2501 if (cxix < cxstack_ix)
2502 dounwind(cxix);
2503 return cxix;
2504}
2505
2506PP(pp_last)
2507{
eb578fdb 2508 PERL_CONTEXT *cx;
a0d0e21e 2509 I32 gimme;
b263a1ad 2510 OP *nextop = NULL;
a0d0e21e
LW
2511 SV **newsp;
2512 PMOP *newpm;
9d4ba2ae 2513
1f039d60 2514 S_unwind_loop(aTHX_ "last");
a0d0e21e
LW
2515
2516 POPBLOCK(cx,newpm);
5dd42e15 2517 cxstack_ix++; /* temporarily protect top context */
d3e5e568
DM
2518 assert(
2519 CxTYPE(cx) == CXt_LOOP_LAZYIV
2520 || CxTYPE(cx) == CXt_LOOP_LAZYSV
2521 || CxTYPE(cx) == CXt_LOOP_FOR
2522 || CxTYPE(cx) == CXt_LOOP_PLAIN
2523 );
2524 newsp = PL_stack_base + cx->blk_loop.resetsp;
2525 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2526
a1f49e72 2527 TAINT_NOT;
0c0c317c 2528 PL_stack_sp = newsp;
f86702cc 2529
5dd42e15
DM
2530 LEAVE;
2531 cxstack_ix--;
f86702cc 2532 /* Stack values are safe: */
d3e5e568
DM
2533 POPLOOP(cx); /* release loop vars ... */
2534 LEAVE;
3280af22 2535 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2536
9d4ba2ae 2537 PERL_UNUSED_VAR(gimme);
f86702cc 2538 return nextop;
a0d0e21e
LW
2539}
2540
2541PP(pp_next)
2542{
eb578fdb 2543 PERL_CONTEXT *cx;
1f039d60 2544 const I32 inner = PL_scopestack_ix;
a0d0e21e 2545
1f039d60 2546 S_unwind_loop(aTHX_ "next");
a0d0e21e 2547
85538317
GS
2548 /* clear off anything above the scope we're re-entering, but
2549 * save the rest until after a possible continue block */
1ba6ee2b 2550 TOPBLOCK(cx);
85538317
GS
2551 if (PL_scopestack_ix < inner)
2552 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2553 PL_curcop = cx->blk_oldcop;
47c9d59f 2554 PERL_ASYNC_CHECK();
d57ce4df 2555 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2556}
2557
2558PP(pp_redo)
2559{
1f039d60 2560 const I32 cxix = S_unwind_loop(aTHX_ "redo");
eb578fdb 2561 PERL_CONTEXT *cx;
a0d0e21e 2562 I32 oldsave;
1f039d60 2563 OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a0d0e21e 2564
a034e688
DM
2565 if (redo_op->op_type == OP_ENTER) {
2566 /* pop one less context to avoid $x being freed in while (my $x..) */
2567 cxstack_ix++;
2568 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2569 redo_op = redo_op->op_next;
2570 }
2571
a0d0e21e 2572 TOPBLOCK(cx);
3280af22 2573 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2574 LEAVE_SCOPE(oldsave);
936c78b5 2575 FREETMPS;
3a1b2b9e 2576 PL_curcop = cx->blk_oldcop;
47c9d59f 2577 PERL_ASYNC_CHECK();
a034e688 2578 return redo_op;
a0d0e21e
LW
2579}
2580
0824fdcb 2581STATIC OP *
5db1eb8d 2582S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2583{
a0d0e21e 2584 OP **ops = opstack;
a1894d81 2585 static const char* const too_deep = "Target of goto is too deeply nested";
a0d0e21e 2586
7918f24d
NC
2587 PERL_ARGS_ASSERT_DOFINDLABEL;
2588
fc36a67e 2589 if (ops >= oplimit)
0157ef98 2590 Perl_croak(aTHX_ "%s", too_deep);
11343788
MB
2591 if (o->op_type == OP_LEAVE ||
2592 o->op_type == OP_SCOPE ||
2593 o->op_type == OP_LEAVELOOP ||
33d34e4c 2594 o->op_type == OP_LEAVESUB ||
11343788 2595 o->op_type == OP_LEAVETRY)
fc36a67e 2596 {
5dc0d613 2597 *ops++ = cUNOPo->op_first;
fc36a67e 2598 if (ops >= oplimit)
0157ef98 2599 Perl_croak(aTHX_ "%s", too_deep);
fc36a67e 2600 }
c4aa4e48 2601 *ops = 0;
11343788 2602 if (o->op_flags & OPf_KIDS) {
aec46f14 2603 OP *kid;
a0d0e21e 2604 /* First try all the kids at this level, since that's likeliest. */
e6dae479 2605 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
7e8f1eac 2606 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF
2607 STRLEN kid_label_len;
2608 U32 kid_label_flags;
2609 const char *kid_label = CopLABEL_len_flags(kCOP,
2610 &kid_label_len, &kid_label_flags);
2611 if (kid_label && (
2612 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2613 (flags & SVf_UTF8)
2614 ? (bytes_cmp_utf8(
2615 (const U8*)kid_label, kid_label_len,
2616 (const U8*)label, len) == 0)
2617 : (bytes_cmp_utf8(
2618 (const U8*)label, len,
2619 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF
2620 : ( len == kid_label_len && ((kid_label == label)
2621 || memEQ(kid_label, label, len)))))
7e8f1eac
AD
2622 return kid;
2623 }
a0d0e21e 2624 }
e6dae479 2625 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
3280af22 2626 if (kid == PL_lastgotoprobe)
a0d0e21e 2627 continue;
ed8d0fe2
SM
2628 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2629 if (ops == opstack)
2630 *ops++ = kid;
2631 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2632 ops[-1]->op_type == OP_DBSTATE)
2633 ops[-1] = kid;
2634 else
2635 *ops++ = kid;
2636 }
5db1eb8d 2637 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2638 return o;
a0d0e21e
LW
2639 }
2640 }
c4aa4e48 2641 *ops = 0;
a0d0e21e
LW
2642 return 0;
2643}
2644
b1c05ba5
DM
2645
2646/* also used for: pp_dump() */
2647
2648PP(pp_goto)
a0d0e21e 2649{
27da23d5 2650 dVAR; dSP;
cbbf8932 2651 OP *retop = NULL;
a0d0e21e 2652 I32 ix;
eb578fdb 2653 PERL_CONTEXT *cx;
fc36a67e
PP
2654#define GOTO_DEPTH 64
2655 OP *enterops[GOTO_DEPTH];
cbbf8932 2656 const char *label = NULL;
5db1eb8d
BF
2657 STRLEN label_len = 0;
2658 U32 label_flags = 0;
bfed75c6 2659 const bool do_dump = (PL_op->op_type == OP_DUMP);
a1894d81 2660 static const char* const must_have_label = "goto must have label";
a0d0e21e 2661
533c011a 2662 if (PL_op->op_flags & OPf_STACKED) {
7d1d69cb
DM
2663 /* goto EXPR or goto &foo */
2664
9d4ba2ae 2665 SV * const sv = POPs;
55b37f1c 2666 SvGETMAGIC(sv);
a0d0e21e
LW
2667
2668 /* This egregious kludge implements goto &subroutine */
2669 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2670 I32 cxix;
eb578fdb 2671 PERL_CONTEXT *cx;
ea726b52 2672 CV *cv = MUTABLE_CV(SvRV(sv));
049bd5ff 2673 AV *arg = GvAV(PL_defgv);
a0d0e21e
LW
2674 I32 oldsave;
2675
e8f7dd13 2676 retry:
4aa0a1f7 2677 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2678 const GV * const gv = CvGV(cv);
e8f7dd13 2679 if (gv) {
7fc63493 2680 GV *autogv;
e8f7dd13
GS
2681 SV *tmpstr;
2682 /* autoloaded stub? */
2683 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2684 goto retry;
c271df94
BF
2685 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2686 GvNAMELEN(gv),
2687 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2688 if (autogv && (cv = GvCV(autogv)))
2689 goto retry;
2690 tmpstr = sv_newmortal();
c445ea15 2691 gv_efullname3(tmpstr, gv, NULL);
be2597df 2692 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2693 }
cea2e8a9 2694 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2695 }
2696
a0d0e21e 2697 /* First do some returnish stuff. */
b37c2d43 2698 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2699 FREETMPS;
a0d0e21e 2700 cxix = dopoptosub(cxstack_ix);
8da3792e
SM
2701 if (cxix < cxstack_ix) {
2702 if (cxix < 0) {
2703 SvREFCNT_dec(cv);
2704 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2705 }
a0d0e21e 2706 dounwind(cxix);
8da3792e 2707 }
a0d0e21e 2708 TOPBLOCK(cx);
2d43a17f 2709 SPAGAIN;
564abe23 2710 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2711 if (CxTYPE(cx) == CXt_EVAL) {
110af908 2712 SvREFCNT_dec(cv);
c74ace89 2713 if (CxREALEVAL(cx))
00455a92 2714 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM
2715 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2716 else
00455a92 2717 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2718 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2719 }
9850bf21 2720 else if (CxMULTICALL(cx))
110af908
FC
2721 {
2722 SvREFCNT_dec(cv);
9850bf21 2723 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
110af908 2724 }
39de75fd
DM
2725
2726 /* partial unrolled POPSUB(): */
2727
bafb2adc 2728 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
a0d0e21e 2729 AV* av = cx->blk_sub.argarray;
bfed75c6 2730
049bd5ff
FC
2731 /* abandon the original @_ if it got reified or if it is
2732 the same as the current @_ */
2733 if (AvREAL(av) || av == arg) {
b1464ded 2734 SvREFCNT_dec(av);
d8b46c1b 2735 av = newAV();
11ca45c0 2736 AvREIFY_only(av);
ad64d0ec 2737 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2738 }
049bd5ff 2739 else CLEAR_ARGARRAY(av);
a0d0e21e 2740 }
88c11d84 2741
049bd5ff
FC
2742 /* We donate this refcount later to the callee’s pad. */
2743 SvREFCNT_inc_simple_void(arg);
88c11d84
DM
2744
2745 assert(PL_scopestack_ix == cx->blk_oldscopesp);
2746 oldsave = PL_scopestack[cx->blk_oldscopesp - 1];
2747 LEAVE_SCOPE(oldsave);
3b21fb5d
DM
2748 PL_comppad = cx->blk_sub.prevcomppad;
2749 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL;
88c11d84 2750
1d59c038
FC
2751 /* A destructor called during LEAVE_SCOPE could have undefined
2752 * our precious cv. See bug #99850. */
2753 if (!CvROOT(cv) && !CvXSUB(cv)) {
2754 const GV * const gv = CvGV(cv);
049bd5ff 2755 SvREFCNT_dec(arg);
1d59c038
FC
2756 if (gv) {
2757 SV * const tmpstr = sv_newmortal();
2758 gv_efullname3(tmpstr, gv, NULL);
2759 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2760 SVfARG(tmpstr));
2761 }
2762 DIE(aTHX_ "Goto undefined subroutine");
2763 }
2764
cd17cc2e
DM
2765 if (CxTYPE(cx) == CXt_SUB) {
2766 CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth;
2767 SvREFCNT_dec_NN(cx->blk_sub.cv);
2768 }
2769
a0d0e21e
LW
2770 /* Now do some callish stuff. */
2771 SAVETMPS;
5023d17a 2772 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2773 if (CvISXSUB(cv)) {
cb65b687
DM
2774 SV **newsp;
2775 I32 gimme;
ad39f3a2 2776 const SSize_t items = arg ? AvFILL(arg) + 1 : 0;
cd313eb4 2777 const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0;
049bd5ff
FC
2778 SV** mark;
2779
cb65b687
DM
2780 PERL_UNUSED_VAR(newsp);
2781 PERL_UNUSED_VAR(gimme);
2782
049bd5ff 2783 /* put GvAV(defgv) back onto stack */
8c9d3376
FC
2784 if (items) {
2785 EXTEND(SP, items+1); /* @_ could have been extended. */
8c9d3376 2786 }
049bd5ff 2787 mark = SP;
ad39f3a2 2788 if (items) {
de935cc9 2789 SSize_t index;
ad39f3a2 2790 bool r = cBOOL(AvREAL(arg));
b1464ded 2791 for (index=0; index<items; index++)
ad39f3a2
FC
2792 {
2793 SV *sv;
2794 if (m) {
2795 SV ** const svp = av_fetch(arg, index, 0);
2796 sv = svp ? *svp : NULL;
dd2a7f90 2797 }
ad39f3a2
FC
2798 else sv = AvARRAY(arg)[index];
2799 SP[index+1] = sv
2800 ? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv
2801 : sv_2mortal(newSVavdefelem(arg, index, 1));
2802 }
049bd5ff 2803 }
ad39f3a2 2804 SP += items;
049bd5ff
FC
2805 SvREFCNT_dec(arg);
2806 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
2807 /* Restore old @_ */
2808 arg = GvAV(PL_defgv);
2809 GvAV(PL_defgv) = cx->blk_sub.savearray;
2810 SvREFCNT_dec(arg);
b1464ded 2811 }
1fa4e549 2812
51eb35b5 2813 retop = cx->blk_sub.retop;
b37c2d43
AL
2814 /* XS subs don't have a CxSUB, so pop it */
2815 POPBLOCK(cx, PL_curpm);
2816 /* Push a mark for the start of arglist */
2817 PUSHMARK(mark);
2818 PUTBACK;
2819 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2820 LEAVE;
51eb35b5 2821 goto _return;
a0d0e21e
LW
2822 }
2823 else {
b70d5558 2824 PADLIST * const padlist = CvPADLIST(cv);
39de75fd
DM
2825
2826 /* partial unrolled PUSHSUB(): */
2827
a0d0e21e 2828 cx->blk_sub.cv = cv;
1a5b3db4 2829 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2830
a0d0e21e 2831 CvDEPTH(cv)++;
2c50b7ed
DM
2832 SvREFCNT_inc_simple_void_NN(cv);
2833 if (CvDEPTH(cv) > 1) {
2b9dff67 2834 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2835 sub_crush_depth(cv);
26019298 2836 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2837 }
426a09cd 2838 PL_curcop = cx->blk_oldcop;
3b21fb5d 2839 cx->blk_sub.prevcomppad = PL_comppad;
fd617465 2840 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2841 if (CxHASARGS(cx))
6d4ff0d2 2842 {
049bd5ff
FC
2843 /* cx->blk_sub.argarray has no reference count, so we
2844 need something to hang on to our argument array so
2845 that cx->blk_sub.argarray does not end up pointing
2846 to freed memory as the result of undef *_. So put
2847 it in the callee’s pad, donating our refer-
2848 ence count. */
bfa371b6
FC
2849 if (arg) {
2850 SvREFCNT_dec(PAD_SVl(0));
2851 PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
2852 }
049bd5ff
FC
2853
2854 /* GvAV(PL_defgv) might have been modified on scope
2855 exit, so restore it. */
2856 if (arg != GvAV(PL_defgv)) {
2857 AV * const av = GvAV(PL_defgv);
2858 GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg);
2859 SvREFCNT_dec(av);
a0d0e21e
LW
2860 }
2861 }
049bd5ff 2862 else SvREFCNT_dec(arg);
491527d0 2863 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2864 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2865 if (PERLDB_GOTO) {
b96d8cd9 2866 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2867 if (gotocv) {
2868 PUSHMARK( PL_stack_sp );
ad64d0ec 2869 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2870 PL_stack_sp--;
2871 }
491527d0 2872 }
1ce6579f 2873 }
51eb35b5
DD
2874 retop = CvSTART(cv);
2875 goto putback_return;
a0d0e21e
LW
2876 }
2877 }
1614b0e3 2878 else {
7d1d69cb 2879 /* goto EXPR */
55b37f1c 2880 label = SvPV_nomg_const(sv, label_len);
5db1eb8d 2881 label_flags = SvUTF8(sv);
1614b0e3 2882 }
a0d0e21e 2883 }
2fc690dc 2884 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
7d1d69cb 2885 /* goto LABEL or dump LABEL */
5db1eb8d
BF
2886 label = cPVOP->op_pv;
2887 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2888 label_len = strlen(label);
2889 }
0157ef98 2890 if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label);
a0d0e21e 2891
f410a211
NC
2892 PERL_ASYNC_CHECK();
2893
3532f34a 2894 if (label_len) {
cbbf8932 2895 OP *gotoprobe = NULL;
3b2447bc 2896 bool leaving_eval = FALSE;
33d34e4c 2897 bool in_block = FALSE;
cbbf8932 2898 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2899
2900 /* find label */
2901
d4c19fe8 2902 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2903 *enterops = 0;
2904 for (ix = cxstack_ix; ix >= 0; ix--) {
2905 cx = &cxstack[ix];
6b35e009 2906 switch (CxTYPE(cx)) {
a0d0e21e 2907 case CXt_EVAL:
3b2447bc 2908 leaving_eval = TRUE;
971ecbe6 2909 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2910 gotoprobe = (last_eval_cx ?
2911 last_eval_cx->blk_eval.old_eval_root :
2912 PL_eval_root);
2913 last_eval_cx = cx;
9c5794fe
RH
2914 break;
2915 }
2916 /* else fall through */
c6fdafd0 2917 case CXt_LOOP_LAZYIV:
d01136d6 2918 case CXt_LOOP_LAZYSV:
3b719c58
NC
2919 case CXt_LOOP_FOR:
2920 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2921 case CXt_GIVEN:
2922 case CXt_WHEN:
e6dae479 2923 gotoprobe = OpSIBLING(cx->blk_oldcop);
a0d0e21e
LW
2924 break;
2925 case CXt_SUBST:
2926 continue;
2927 case CXt_BLOCK:
33d34e4c 2928 if (ix) {
e6dae479 2929 gotoprobe = OpSIBLING(cx->blk_oldcop);
33d34e4c
AE
2930 in_block = TRUE;
2931 } else
3280af22 2932 gotoprobe = PL_main_root;
a0d0e21e 2933 break;
b3933176 2934 case CXt_SUB:
9850bf21 2935 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2936 gotoprobe = CvROOT(cx->blk_sub.cv);
2937 break;
2938 }
924ba076 2939 /* FALLTHROUGH */
7766f137 2940 case CXt_FORMAT:
0a753a76 2941 case CXt_NULL:
a651a37d 2942 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2943 default:
2944 if (ix)
5637ef5b
NC
2945 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
2946 CxTYPE(cx), (long) ix);
3280af22 2947 gotoprobe = PL_main_root;
a0d0e21e
LW
2948 break;
2949 }
2b597662 2950 if (gotoprobe) {
29e61fd9
DM
2951 OP *sibl1, *sibl2;
2952
5db1eb8d 2953 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS
2954 enterops, enterops + GOTO_DEPTH);
2955 if (retop)
2956 break;
e6dae479 2957 if ( (sibl1 = OpSIBLING(gotoprobe)) &&
29e61fd9 2958 sibl1->op_type == OP_UNSTACK &&
e6dae479 2959 (sibl2 = OpSIBLING(sibl1)))
29e61fd9
DM
2960 {
2961 retop = dofindlabel(sibl2,
5db1eb8d
BF
2962 label, label_len, label_flags, enterops,
2963 enterops + GOTO_DEPTH);
eae48c89
Z
2964 if (retop)
2965 break;
2966 }
2b597662 2967 }
3280af22 2968 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2969 }
2970 if (!retop)
b17a0679
FC
2971 DIE(aTHX_ "Can't find label %"UTF8f,
2972 UTF8fARG(label_flags, label_len, label));
a0d0e21e 2973
3b2447bc
RH
2974 /* if we're leaving an eval, check before we pop any frames
2975 that we're not going to punt, otherwise the error
2976 won't be caught */
2977
2978 if (leaving_eval && *enterops && enterops[1]) {
2979 I32 i;
2980 for (i = 1; enterops[i]; i++)
2981 if (enterops[i]->op_type == OP_ENTERITER)
2982 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2983 }
2984
b500e03b
GG
2985 if (*enterops && enterops[1]) {
2986 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2987 if (enterops[i])
2988 deprecate("\"goto\" to jump into a construct");
2989 }
2990
a0d0e21e
LW
2991 /* pop unwanted frames */
2992
2993 if (ix < cxstack_ix) {
2994 I32 oldsave;
2995
2996 if (ix < 0)
5edb7975 2997 DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix);
a0d0e21e
LW
2998 dounwind(ix);
2999 TOPBLOCK(cx);
3280af22 3000 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3001 LEAVE_SCOPE(oldsave);
3002 }
3003
3004 /* push wanted frames */
3005
748a9306 3006 if (*enterops && enterops[1]) {
0bd48802 3007 OP * const oldop = PL_op;
33d34e4c
AE
3008 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3009 for (; enterops[ix]; ix++) {
533c011a 3010 PL_op = enterops[ix];
84902520
TB
3011 /* Eventually we may want to stack the needed arguments
3012 * for each op. For now, we punt on the hard ones. */
533c011a 3013 if (PL_op->op_type == OP_ENTERITER)
894356b3 3014 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3015 PL_op->op_ppaddr(aTHX);
a0d0e21e 3016 }
533c011a 3017 PL_op = oldop;
a0d0e21e
LW
3018 }
3019 }
3020
2631bbca 3021 if (do_dump) {
a5f75d66 3022#ifdef VMS
6b88bc9c 3023 if (!retop) retop = PL_main_start;
a5f75d66 3024#endif
3280af22
NIS
3025 PL_restartop = retop;
3026 PL_do_undump = TRUE;
a0d0e21e
LW
3027
3028 my_unexec();
3029
3280af22
NIS
3030 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3031 PL_do_undump = FALSE;
a0d0e21e
LW
3032 }
3033
51eb35b5
DD
3034 putback_return:
3035 PL_stack_sp = sp;
3036 _return:
47c9d59f 3037 PERL_ASYNC_CHECK();
51eb35b5 3038 return retop;
a0d0e21e
LW
3039}
3040
3041PP(pp_exit)
3042{
39644a26 3043 dSP;
a0d0e21e
LW
3044 I32 anum;
3045
3046 if (MAXARG < 1)
3047 anum = 0;
9d3c658e
FC
3048 else if (!TOPs) {
3049 anum = 0; (void)POPs;
3050 }
ff0cee69 3051 else {
a0d0e21e 3052 anum = SvIVx(POPs);
d98f61e7 3053#ifdef VMS
5450b4d8
FC
3054 if (anum == 1
3055 && SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0)))
ff0cee69 3056 anum = 0;
97124ef6
FC
3057 VMSISH_HUSHED =
3058 VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3059#endif
3060 }
cc3604b1 3061 PL_exit_flags |= PERL_EXIT_EXPECTED;
a0d0e21e 3062 my_exit(anum);
3280af22 3063 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3064 RETURN;
3065}
3066
a0d0e21e
LW
3067/* Eval. */
3068
0824fdcb 3069STATIC void
cea2e8a9 3070S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3071{
504618e9 3072 const char *s = SvPVX_const(sv);
890ce7af 3073 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3074 I32 line = 1;
a0d0e21e 3075
7918f24d
NC
3076 PERL_ARGS_ASSERT_SAVE_LINES;
3077
a0d0e21e 3078 while (s && s < send) {
f54cb97a 3079 const char *t;
b9f83d2f 3080 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3081
1d963ff3 3082 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3083 if (t)
3084 t++;
3085 else
3086 t = send;
3087
3088 sv_setpvn(tmpstr, s, t - s);
3089 av_store(array, line++, tmpstr);
3090 s = t;
3091 }
3092}
3093
22f16304
RU
3094/*
3095=for apidoc docatch
3096
3097Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3098
30990 is used as continue inside eval,
3100
31013 is used for a die caught by an inner eval - continue inner loop
3102
75af9d73 3103See F<cop.h>: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
22f16304
RU
3104establish a local jmpenv to handle exception traps.
3105
3106=cut
3107*/
0824fdcb 3108STATIC OP *
cea2e8a9 3109S_docatch(pTHX_ OP *o)
1e422769 3110{
6224f72b 3111 int ret;
06b5626a 3112 OP * const oldop = PL_op;
db36c5a1 3113 dJMPENV;
1e422769 3114
1e422769 3115#ifdef DEBUGGING
54310121 3116 assert(CATCH_GET == TRUE);
1e422769 3117#endif
312caa8e 3118 PL_op = o;
8bffa5f8 3119
14dd3ad8 3120 JMPENV_PUSH(ret);
6224f72b 3121 switch (ret) {
312caa8e 3122 case 0:
abd70938
DM
3123 assert(cxstack_ix >= 0);
3124 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3125 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3126 redo_body:
85aaa934 3127 CALLRUNOPS(aTHX);
312caa8e
CS
3128 break;
3129 case 3:
8bffa5f8 3130 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3131 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3132 PL_restartjmpenv = NULL;
312caa8e
CS
3133 PL_op = PL_restartop;
3134 PL_restartop = 0;
3135 goto redo_body;
3136 }
924ba076 3137 /* FALLTHROUGH */
312caa8e 3138 default:
14dd3ad8 3139 JMPENV_POP;
533c011a 3140 PL_op = oldop;
6224f72b 3141 JMPENV_JUMP(ret);
e5964223 3142 NOT_REACHED; /* NOTREACHED */
1e422769 3143 }
14dd3ad8 3144 JMPENV_POP;
533c011a 3145 PL_op = oldop;
5f66b61c 3146 return NULL;
1e422769
PP
3147}
3148
a3985cdc
DM
3149
3150/*
3151=for apidoc find_runcv
3152
3153Locate the CV corresponding to the currently executing sub or eval.
796b6530
KW
3154If C<db_seqp> is non_null, skip CVs that are in the DB package and populate
3155C<*db_seqp> with the cop sequence number at the point that the DB:: code was
72d33970
FC
3156entered. (This allows debuggers to eval in the scope of the breakpoint
3157rather than in the scope of the debugger itself.)
a3985cdc
DM
3158
3159=cut
3160*/
3161
3162CV*
d819b83a 3163Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3164{
db4cf31d 3165 return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp);
70794f7b
FC
3166}
3167
3168/* If this becomes part of the API, it might need a better name. */
3169CV *
db4cf31d 3170Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp)
70794f7b 3171{
a3985cdc 3172 PERL_SI *si;
b4b0692a 3173 int level = 0;
a3985cdc 3174
d819b83a 3175 if (db_seqp)
c3923c33
DM
3176 *db_seqp =
3177 PL_curcop == &PL_compiling
3178 ? PL_cop_seqmax
3179 : PL_curcop->cop_seq;
3180
a3985cdc 3181 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3182 I32 ix;
a3985cdc 3183 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3184 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
70794f7b 3185 CV *cv = NULL;
d819b83a 3186 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
70794f7b 3187 cv = cx->blk_sub.cv;
d819b83a
DM
3188 /* skip DB:: code */
3189 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3190 *db_seqp = cx->blk_oldcop->cop_seq;
3191 continue;
3192 }
a453e28a
DM
3193 if (cx->cx_type & CXp_SUB_RE)
3194 continue;
d819b83a 3195 }
a3985cdc 3196 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
70794f7b
FC
3197 cv = cx->blk_eval.cv;
3198 if (cv) {
3199 switch (cond) {
db4cf31d
FC
3200 case FIND_RUNCV_padid_eq:
3201 if (!CvPADLIST(cv)
b4db5868 3202 || CvPADLIST(cv)->xpadl_id != (U32)arg)
8771da69 3203 continue;
b4b0692a
FC
3204 return cv;
3205 case FIND_RUNCV_level_eq:
db4cf31d 3206 if (level++ != arg) continue;
70794f7b
FC
3207 /* GERONIMO! */
3208 default:
3209 return cv;
3210 }
3211 }
a3985cdc
DM
3212 }
3213 }
db4cf31d 3214 return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv;
a3985cdc
DM
3215}
3216
3217
27e90453
DM
3218/* Run yyparse() in a setjmp wrapper. Returns:
3219 * 0: yyparse() successful
3220 * 1: yyparse() failed
3221 * 3: yyparse() died
3222 */
3223STATIC int
28ac2b49 3224S_try_yyparse(pTHX_ int gramtype)
27e90453
DM
3225{
3226 int ret;
3227 dJMPENV;
3228
3229 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3230 JMPENV_PUSH(ret);
3231 switch (ret) {
3232 case 0:
28ac2b49 3233 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM
3234 break;
3235 case 3:
3236 break;
3237 default:
3238 JMPENV_POP;
3239 JMPENV_JUMP(ret);
e5964223 3240 NOT_REACHED; /* NOTREACHED */
27e90453
DM
3241 }
3242 JMPENV_POP;
3243 return ret;
3244}
3245
3246
104a8185
DM
3247/* Compile a require/do or an eval ''.
3248 *
a3985cdc 3249 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM
3250 * seq is the current COP scope value.
3251 * hh is the saved hints hash, if any.
3252 *
410be5db 3253 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM
3254 * PL_eval_start contains the first op of the compiled code; otherwise,
3255 * pushes undef.
3256 *
3257 * This function is called from two places: pp_require and pp_entereval.
3258 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC
3259 */
3260
410be5db 3261STATIC bool
104a8185 3262S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3263{
20b7effb 3264 dSP;
46c461b5 3265 OP * const saveop = PL_op;
104a8185 3266 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3267 COP * const oldcurcop = PL_curcop;
26c9400e 3268 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3269 int yystatus;
676a678a 3270 CV *evalcv;
a0d0e21e 3271
27e90453 3272 PL_in_eval = (in_require
6dc8a9e4 3273 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
a1941760
DM
3274 : (EVAL_INEVAL |
3275 ((PL_op->op_private & OPpEVAL_RE_REPARSING)
3276 ? EVAL_RE_REPARSING : 0)));
a0d0e21e 3277
1ce6579f
PP
3278 PUSHMARK(SP);
3279
676a678a
Z
3280 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3281 CvEVAL_on(evalcv);
2090ab20 3282 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3283 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3284 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3285
676a678a
Z
3286 CvOUTSIDE_SEQ(evalcv) = seq;
3287 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3288
dd2155a4 3289 /* set up a scratch pad */
a0d0e21e 3290
eacbb379 3291 CvPADLIST_set(evalcv, pad_new(padnew_SAVE));
cecbe010 3292 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3293
07055b4c 3294
b5bbe64a 3295 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3296
a0d0e21e
LW
3297 /* make sure we compile in the right package */
3298
ed094faf 3299 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026 3300 SAVEGENERICSV(PL_curstash);
cb1ad50e
FC
3301 PL_curstash = (HV *)CopSTASH(PL_curcop);
3302 if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL;
3303 else SvREFCNT_inc_simple_void(PL_curstash);
a0d0e21e 3304 }
3c10abe3 3305 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3306 SAVESPTR(PL_beginav);
3307 PL_beginav = newAV();
3308 SAVEFREESV(PL_beginav);
3c10abe3
AG
3309 SAVESPTR(PL_unitcheckav);
3310 PL_unitcheckav = newAV();
3311 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3312
81d86705 3313
104a8185 3314 ENTER_with_name("evalcomp");
676a678a
Z
3315 SAVESPTR(PL_compcv);
3316 PL_compcv = evalcv;
3317
a0d0e21e
LW
3318 /* try to compile it */
3319
5f66b61c 3320 PL_eval_root = NULL;
3280af22 3321 PL_curcop = &PL_compiling;
26c9400e 3322 if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3323 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3324 else
3325 CLEAR_ERRSV();
27e90453 3326
377b5421
DM
3327 SAVEHINTS();
3328 if (clear_hints) {
3329 PL_hints = 0;
3330 hv_clear(GvHV(PL_hintgv));
3331 }
3332 else {
3333 PL_hints = saveop->op_private & OPpEVAL_COPHH
3334 ? oldcurcop->cop_hints : saveop->op_targ;
4f3e2518
DM
3335
3336 /* making 'use re eval' not be in scope when compiling the
3337 * qr/mabye_has_runtime_code_block/ ensures that we don't get
3338 * infinite recursion when S_has_runtime_code() gives a false
3339 * positive: the second time round, HINT_RE_EVAL isn't set so we
3340 * don't bother calling S_has_runtime_code() */
3341 if (PL_in_eval & EVAL_RE_REPARSING)
3342 PL_hints &= ~HINT_RE_EVAL;
3343
377b5421
DM
3344 if (hh) {
3345 /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */
3346 SvREFCNT_dec(GvHV(PL_hintgv));
3347 GvHV(PL_hintgv) = hh;
3348 }
3349 }
3350 SAVECOMPILEWARNINGS();
3351 if (clear_hints) {
3352 if (PL_dowarn & G_WARN_ALL_ON)
3353 PL_compiling.cop_warnings = pWARN_ALL ;
3354 else if (PL_dowarn & G_WARN_ALL_OFF)
3355 PL_compiling.cop_warnings = pWARN_NONE ;
3356 else
3357 PL_compiling.cop_warnings = pWARN_STD ;
3358 }
3359 else {
3360 PL_compiling.cop_warnings =
3361 DUP_WARNINGS(oldcurcop->cop_warnings);
3362 cophh_free(CopHINTHASH_get(&PL_compiling));
3363 if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) {
3364 /* The label, if present, is the first entry on the chain. So rather
3365 than writing a blank label in front of it (which involves an
3366 allocation), just use the next entry in the chain. */
3367 PL_compiling.cop_hints_hash
3368 = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next);
3369 /* Check the assumption that this removed the label. */
3370 assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL);
f45b078d 3371 }
377b5421
DM
3372 else
3373 PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash);
3374 }
f45b078d 3375
a88d97bf 3376 CALL_BLOCK_HOOKS(bhk_eval, saveop);
52db365a 3377
27e90453
DM
3378 /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
3379 * so honour CATCH_GET and trap it here if necessary */
3380
28ac2b49 3381 yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG);
27e90453
DM
3382
3383 if (yystatus || PL_parser->error_count || !PL_eval_root) {
0c58d367 3384 SV **newsp; /* Used by POPBLOCK. */
d164302a 3385 PERL_CONTEXT *cx;
27e90453 3386 I32 optype; /* Used by POPEVAL. */
d164302a 3387 SV *namesv;
eed484f9 3388 SV *errsv = NULL;
bfed75c6 3389
d164302a
GG
3390 cx = NULL;
3391 namesv = NULL;
27e90453
DM
3392 PERL_UNUSED_VAR(newsp);
3393 PERL_UNUSED_VAR(optype);
3394
c86ffc32
DM
3395 /* note that if yystatus == 3, then the EVAL CX block has already
3396 * been popped, and various vars restored */
533c011a 3397 PL_op = saveop;
27e90453 3398 if (yystatus != 3) {
c86ffc32
DM
3399 if (PL_eval_root) {
3400 op_free(PL_eval_root);
3401 PL_eval_root = NULL;
3402 }
27e90453 3403 SP = PL_stack_base + POPMARK; /* pop original mark */
377b5421
DM
3404 POPBLOCK(cx,PL_curpm);
3405 POPEVAL(cx);
3406 namesv = cx->blk_eval.old_namesv;
bbde7ba3 3407 /* POPBLOCK renders LEAVE_with_name("evalcomp") unnecessary. */
27e90453 3408 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
cd6472fc 3409 }
9d4ba2ae 3410
eed484f9 3411 errsv = ERRSV;
27e90453 3412 if (in_require) {
b6494f15
VP
3413 if (!cx) {
3414 /* If cx is still NULL, it means that we didn't go in the
3415 * POPEVAL branch. */
3416 cx = &cxstack[cxstack_ix];
3417 assert(CxTYPE(cx) == CXt_EVAL);
3418 namesv = cx->blk_eval.old_namesv;
3419 }
3420 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 3421 SvPVX_const(namesv),
c60dbbc3 3422 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)Sv