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[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);
a3a5050b 1522 LEAVE_SCOPE(PL_scopestack[cx->blk_oldscopesp-1]);
a0d0e21e 1523 break;
c6fdafd0 1524 case CXt_LOOP_LAZYIV:
d01136d6 1525 case CXt_LOOP_LAZYSV:
3b719c58
NC
1526 case CXt_LOOP_FOR:
1527 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1528 POPLOOP(cx);
1529 break;
0a753a76 1530 case CXt_NULL:
a0d0e21e 1531 break;
7766f137
GS
1532 case CXt_FORMAT:
1533 POPFORMAT(cx);
1534 break;
a0d0e21e 1535 }
c90c0ff4 1536 cxstack_ix--;
a0d0e21e 1537 }
1b6737cc 1538 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1539}
1540
5a844595
GS
1541void
1542Perl_qerror(pTHX_ SV *err)
1543{
7918f24d
NC
1544 PERL_ARGS_ASSERT_QERROR;
1545
6b2fb389
DM
1546 if (PL_in_eval) {
1547 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1548 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1549 SVfARG(err));
6b2fb389
DM
1550 }
1551 else
1552 sv_catsv(ERRSV, err);
1553 }
5a844595
GS
1554 else if (PL_errors)
1555 sv_catsv(PL_errors, err);
1556 else
be2597df 1557 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1558 if (PL_parser)
1559 ++PL_parser->error_count;
5a844595
GS
1560}
1561
bb4c52e0 1562void
c5df3096 1563Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1564{
c5df3096 1565 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1566 U8 in_eval = PL_in_eval;
c5df3096 1567 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1568
96d9b9cd 1569 if (in_eval) {
a0d0e21e 1570 I32 cxix;
a0d0e21e 1571 I32 gimme;
a0d0e21e 1572
22a30693
Z
1573 /*
1574 * Historically, perl used to set ERRSV ($@) early in the die
1575 * process and rely on it not getting clobbered during unwinding.
1576 * That sucked, because it was liable to get clobbered, so the
1577 * setting of ERRSV used to emit the exception from eval{} has
1578 * been moved to much later, after unwinding (see just before
1579 * JMPENV_JUMP below). However, some modules were relying on the
1580 * early setting, by examining $@ during unwinding to use it as
1581 * a flag indicating whether the current unwinding was caused by
1582 * an exception. It was never a reliable flag for that purpose,
1583 * being totally open to false positives even without actual
1584 * clobberage, but was useful enough for production code to
1585 * semantically rely on it.
1586 *
1587 * We'd like to have a proper introspective interface that
1588 * explicitly describes the reason for whatever unwinding
1589 * operations are currently in progress, so that those modules
1590 * work reliably and $@ isn't further overloaded. But we don't
1591 * have one yet. In its absence, as a stopgap measure, ERRSV is
1592 * now *additionally* set here, before unwinding, to serve as the
1593 * (unreliable) flag that it used to.
1594 *
1595 * This behaviour is temporary, and should be removed when a
1596 * proper way to detect exceptional unwinding has been developed.
1597 * As of 2010-12, the authors of modules relying on the hack
1598 * are aware of the issue, because the modules failed on
1599 * perls 5.13.{1..7} which had late setting of $@ without this
1600 * early-setting hack.
1601 */
1602 if (!(in_eval & EVAL_KEEPERR)) {
1603 SvTEMP_off(exceptsv);
1604 sv_setsv(ERRSV, exceptsv);
1605 }
1606
fc941f37
Z
1607 if (in_eval & EVAL_KEEPERR) {
1608 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1609 SVfARG(exceptsv));
1610 }
1611
5a844595
GS
1612 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1613 && PL_curstackinfo->si_prev)
1614 {
bac4b2ad 1615 dounwind(-1);
d3acc0f7 1616 POPSTACK;
bac4b2ad 1617 }
e336de0d 1618
a0d0e21e
LW
1619 if (cxix >= 0) {
1620 I32 optype;
b6494f15 1621 SV *namesv;
eb578fdb 1622 PERL_CONTEXT *cx;
901017d6 1623 SV **newsp;
e32ff4e1 1624#ifdef DEBUGGING
8f89e5a9 1625 COP *oldcop;
20189068 1626#endif
8f89e5a9
Z
1627 JMPENV *restartjmpenv;
1628 OP *restartop;
a0d0e21e
LW
1629
1630 if (cxix < cxstack_ix)
1631 dounwind(cxix);
1632
3280af22 1633 POPBLOCK(cx,PL_curpm);
6b35e009 1634 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1635 STRLEN msglen;
96d9b9cd 1636 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1637 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1638 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1639 my_exit(1);
1640 }
1641 POPEVAL(cx);
b6494f15 1642 namesv = cx->blk_eval.old_namesv;
e32ff4e1 1643#ifdef DEBUGGING
8f89e5a9 1644 oldcop = cx->blk_oldcop;
20189068 1645#endif
8f89e5a9
Z
1646 restartjmpenv = cx->blk_eval.cur_top_env;
1647 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1648
1649 if (gimme == G_SCALAR)
3280af22
NIS
1650 *++newsp = &PL_sv_undef;
1651 PL_stack_sp = newsp;
a0d0e21e
LW
1652
1653 LEAVE;
748a9306 1654
7a2e2cd6 1655 if (optype == OP_REQUIRE) {
e32ff4e1 1656 assert (PL_curcop == oldcop);
b6494f15 1657 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1658 SvPVX_const(namesv),
c60dbbc3 1659 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1660 &PL_sv_undef, 0);
27e90453
DM
1661 /* note that unlike pp_entereval, pp_require isn't
1662 * supposed to trap errors. So now that we've popped the
1663 * EVAL that pp_require pushed, and processed the error
1664 * message, rethrow the error */
ecad31f0
BF
1665 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1666 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1667 SVs_TEMP)));
7a2e2cd6 1668 }
fc941f37 1669 if (!(in_eval & EVAL_KEEPERR))
96d9b9cd 1670 sv_setsv(ERRSV, exceptsv);
8f89e5a9
Z
1671 PL_restartjmpenv = restartjmpenv;
1672 PL_restartop = restartop;
bb4c52e0 1673 JMPENV_JUMP(3);
e5964223 1674 NOT_REACHED; /* NOTREACHED */
a0d0e21e
LW
1675 }
1676 }
87582a92 1677
96d9b9cd 1678 write_to_stderr(exceptsv);
f86702cc 1679 my_failure_exit();
e5964223 1680 NOT_REACHED; /* NOTREACHED */
a0d0e21e
LW
1681}
1682
1683PP(pp_xor)
1684{
20b7effb 1685 dSP; dPOPTOPssrl;
a0d0e21e
LW
1686 if (SvTRUE(left) != SvTRUE(right))
1687 RETSETYES;
1688 else
1689 RETSETNO;
1690}
1691
8dff4fc5 1692/*
dcccc8ff
KW
1693
1694=head1 CV Manipulation Functions
1695
8dff4fc5
BM
1696=for apidoc caller_cx
1697
72d33970 1698The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
8dff4fc5 1699returned C<PERL_CONTEXT> structure can be interrogated to find all the
72d33970 1700information returned to Perl by C<caller>. Note that XSUBs don't get a
8dff4fc5
BM
1701stack frame, so C<caller_cx(0, NULL)> will return information for the
1702immediately-surrounding Perl code.
1703
1704This function skips over the automatic calls to C<&DB::sub> made on the
72d33970 1705behalf of the debugger. If the stack frame requested was a sub called by
8dff4fc5
BM
1706C<DB::sub>, the return value will be the frame for the call to
1707C<DB::sub>, since that has the correct line number/etc. for the call
72d33970 1708site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
8dff4fc5
BM
1709frame for the sub call itself.
1710
1711=cut
1712*/
1713
1714const PERL_CONTEXT *
1715Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1716{
eb578fdb
KW
1717 I32 cxix = dopoptosub(cxstack_ix);
1718 const PERL_CONTEXT *cx;
1719 const PERL_CONTEXT *ccstack = cxstack;
901017d6 1720 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1721
a0d0e21e 1722 for (;;) {
2c375eb9
GS
1723 /* we may be in a higher stacklevel, so dig down deeper */
1724 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1725 top_si = top_si->si_prev;
1726 ccstack = top_si->si_cxstack;
1727 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1728 }
8dff4fc5
BM
1729 if (cxix < 0)
1730 return NULL;
f2a7f298 1731 /* caller() should not report the automatic calls to &DB::sub */
1732 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1733 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1734 count++;
1735 if (!count--)
1736 break;
2c375eb9 1737 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1738 }
2c375eb9
GS
1739
1740 cx = &ccstack[cxix];
8dff4fc5
BM
1741 if (dbcxp) *dbcxp = cx;
1742
7766f137 1743 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1744 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1745 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1746 field below is defined for any cx. */
f2a7f298 1747 /* caller() should not report the automatic calls to &DB::sub */
1748 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1749 cx = &ccstack[dbcxix];
06a5b730
PP
1750 }
1751
8dff4fc5
BM
1752 return cx;
1753}
1754
1755PP(pp_caller)
1756{
8dff4fc5 1757 dSP;
eb578fdb 1758 const PERL_CONTEXT *cx;
8dff4fc5 1759 const PERL_CONTEXT *dbcx;
48ebc325 1760 I32 gimme = GIMME_V;
d527ce7c 1761 const HEK *stash_hek;
8dff4fc5 1762 I32 count = 0;
ce0b554b 1763 bool has_arg = MAXARG && TOPs;
25502127 1764 const COP *lcop;
8dff4fc5 1765
ce0b554b
FC
1766 if (MAXARG) {
1767 if (has_arg)
8dff4fc5 1768 count = POPi;
ce0b554b
FC
1769 else (void)POPs;
1770 }
8dff4fc5 1771
ce0b554b 1772 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5 1773 if (!cx) {
48ebc325 1774 if (gimme != G_ARRAY) {
8dff4fc5
BM
1775 EXTEND(SP, 1);
1776 RETPUSHUNDEF;
1777 }
1778 RETURN;
1779 }
1780
fb55feef 1781 DEBUG_CX("CALLER");
d0279c7c 1782 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC
1783 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1784 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1785 : NULL;
48ebc325 1786 if (gimme != G_ARRAY) {
27d41816 1787 EXTEND(SP, 1);
d527ce7c 1788 if (!stash_hek)
3280af22 1789 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1790 else {
1791 dTARGET;
d527ce7c 1792 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1793 PUSHs(TARG);
1794 }
a0d0e21e
LW
1795 RETURN;
1796 }
a0d0e21e 1797
b3ca2e83 1798 EXTEND(SP, 11);
27d41816 1799
d527ce7c 1800 if (!stash_hek)
3280af22 1801 PUSHs(&PL_sv_undef);
d527ce7c
BF
1802 else {
1803 dTARGET;
1804 sv_sethek(TARG, stash_hek);
1805 PUSHTARG;
1806 }
6e449a3a 1807 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
e6dae479 1808 lcop = closest_cop(cx->blk_oldcop, OpSIBLING(cx->blk_oldcop),
25502127
FC
1809 cx->blk_sub.retop, TRUE);
1810 if (!lcop)
1811 lcop = cx->blk_oldcop;
e9e9e546 1812 mPUSHu(CopLINE(lcop));
ce0b554b 1813 if (!has_arg)
a0d0e21e 1814 RETURN;
7766f137
GS
1815 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1816 /* So is ccstack[dbcxix]. */
a5f47741 1817 if (CvHASGV(dbcx->blk_sub.cv)) {
ecf05a58 1818 PUSHs(cv_name(dbcx->blk_sub.cv, 0, 0));
bf38a478 1819 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1820 }
1821 else {
84bafc02 1822 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1823 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1824 }
a0d0e21e
LW
1825 }
1826 else {
84bafc02 1827 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1828 mPUSHi(0);
a0d0e21e 1829 }
54310121
PP
1830 gimme = (I32)cx->blk_gimme;
1831 if (gimme == G_VOID)
3280af22 1832 PUSHs(&PL_sv_undef);
54310121 1833 else
98625aca 1834 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1835 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1836 /* eval STRING */
85a64632 1837 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
78beb4ca
TC
1838 SV *cur_text = cx->blk_eval.cur_text;
1839 if (SvCUR(cur_text) >= 2) {
1840 PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2,
1841 SvUTF8(cur_text)|SVs_TEMP));
1842 }
1843 else {
1844 /* I think this is will always be "", but be sure */
1845 PUSHs(sv_2mortal(newSVsv(cur_text)));
1846 }
1847
3280af22 1848 PUSHs(&PL_sv_no);
0f79a09d 1849 }
811a4de9 1850 /* require */
0f79a09d 1851 else if (cx->blk_eval.old_namesv) {
6e449a3a 1852 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1853 PUSHs(&PL_sv_yes);
06a5b730 1854 }
811a4de9
GS
1855 /* eval BLOCK (try blocks have old_namesv == 0) */
1856 else {
1857 PUSHs(&PL_sv_undef);
1858 PUSHs(&PL_sv_undef);
1859 }
4633a7c4 1860 }
a682de96
GS
1861 else {
1862 PUSHs(&PL_sv_undef);
1863 PUSHs(&PL_sv_undef);
1864 }
bafb2adc 1865 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1866 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1867 {
66a1b24b 1868 AV * const ary = cx->blk_sub.argarray;
c70927a6 1869 const SSize_t off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1870
e1a80902 1871 Perl_init_dbargs(aTHX);
a0d0e21e 1872
3280af22
NIS
1873 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1874 av_extend(PL_dbargs, AvFILLp(ary) + off);
1875 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1876 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1877 }
6e449a3a 1878 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1879 {
1880 SV * mask ;
72dc9ed5 1881 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1882
f07626ad 1883 if (old_warnings == pWARN_NONE)
e476b1b5 1884 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
f07626ad
FC
1885 else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0)
1886 mask = &PL_sv_undef ;
ac27b0f5 1887 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1888 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1889 /* Get the bit mask for $warnings::Bits{all}, because
1890 * it could have been extended by warnings::register */
1891 SV **bits_all;
6673a63c 1892 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1893 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1894 mask = newSVsv(*bits_all);
1895 }
1896 else {
1897 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1898 }
1899 }
e476b1b5 1900 else
72dc9ed5 1901 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1902 mPUSHs(mask);
e476b1b5 1903 }
b3ca2e83 1904
c28fe1ec 1905 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1906 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1907 : &PL_sv_undef);
a0d0e21e
LW
1908 RETURN;
1909}
1910
a0d0e21e
LW
1911PP(pp_reset)
1912{
39644a26 1913 dSP;
ca826051
FC
1914 const char * tmps;
1915 STRLEN len = 0;
1916 if (MAXARG < 1 || (!TOPs && !POPs))
1917 tmps = NULL, len = 0;
1918 else
1919 tmps = SvPVx_const(POPs, len);
1920 sv_resetpvn(tmps, len, CopSTASH(PL_curcop));
3280af22 1921 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1922 RETURN;
1923}
1924
dd2155a4
DM
1925/* like pp_nextstate, but used instead when the debugger is active */
1926
a0d0e21e
LW
1927PP(pp_dbstate)
1928{
533c011a 1929 PL_curcop = (COP*)PL_op;
a0d0e21e 1930 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1931 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1932 FREETMPS;
1933
f410a211
NC
1934 PERL_ASYNC_CHECK();
1935
88df5f01 1936 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
a6d69523 1937 || PL_DBsingle_iv || PL_DBsignal_iv || PL_DBtrace_iv)
a0d0e21e 1938 {
39644a26 1939 dSP;
eb578fdb 1940 PERL_CONTEXT *cx;
f54cb97a 1941 const I32 gimme = G_ARRAY;
eb160463 1942 U8 hasargs;
0bd48802 1943 GV * const gv = PL_DBgv;
432d4561
JL
1944 CV * cv = NULL;
1945
1946 if (gv && isGV_with_GP(gv))
1947 cv = GvCV(gv);
a0d0e21e 1948
c2cb6f77 1949 if (!cv || (!CvROOT(cv) && !CvXSUB(cv)))
cea2e8a9 1950 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1951
aea4f609
DM
1952 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1953 /* don't do recursive DB::DB call */
a0d0e21e 1954 return NORMAL;
748a9306 1955
a57c6685 1956 ENTER;
4633a7c4
LW
1957 SAVETMPS;
1958
3280af22 1959 SAVEI32(PL_debug);
55497cff 1960 SAVESTACK_POS();
3280af22 1961 PL_debug = 0;
748a9306 1962 hasargs = 0;
924508f0 1963 SPAGAIN;
748a9306 1964
aed2304a 1965 if (CvISXSUB(cv)) {
c127bd3a
SF
1966 PUSHMARK(SP);
1967 (void)(*CvXSUB(cv))(aTHX_ cv);
c127bd3a 1968 FREETMPS;
a57c6685 1969 LEAVE;
c127bd3a
SF
1970 return NORMAL;
1971 }
1972 else {
1973 PUSHBLOCK(cx, CXt_SUB, SP);
1974 PUSHSUB_DB(cx);
1975 cx->blk_sub.retop = PL_op->op_next;
1976 CvDEPTH(cv)++;
9d976ff5
FC
1977 if (CvDEPTH(cv) >= 2) {
1978 PERL_STACK_OVERFLOW_CHECK();
1979 pad_push(CvPADLIST(cv), CvDEPTH(cv));
1980 }
9d976ff5 1981 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv));
c127bd3a
SF
1982 RETURNOP(CvSTART(cv));
1983 }
a0d0e21e
LW
1984 }
1985 else
1986 return NORMAL;
1987}
1988
2fc507dc
FC
1989/* S_leave_common: Common code that many functions in this file use on
1990 scope exit. */
1991
2ec7f6f2
FC
1992/* SVs on the stack that have any of the flags passed in are left as is.
1993 Other SVs are protected via the mortals stack if lvalue is true, and
2fc507dc
FC
1994 copied otherwise.
1995
1996 Also, taintedness is cleared.
1997*/
2ec7f6f2 1998
b9d76716 1999STATIC SV **
2fc507dc 2000S_leave_common(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme,
2ec7f6f2 2001 U32 flags, bool lvalue)
b9d76716 2002{
9a214eec 2003 bool padtmp = 0;
2fc507dc 2004 PERL_ARGS_ASSERT_LEAVE_COMMON;
b9d76716 2005
80dd201b 2006 TAINT_NOT;
9a214eec
DM
2007 if (flags & SVs_PADTMP) {
2008 flags &= ~SVs_PADTMP;
2009 padtmp = 1;
2010 }
b9d76716
VP
2011 if (gimme == G_SCALAR) {
2012 if (MARK < SP)
9a214eec 2013 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2ec7f6f2
FC
2014 ? *SP
2015 : lvalue
2016 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2017 : sv_mortalcopy(*SP);
b9d76716
VP
2018 else {
2019 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2020 MARK = newsp;
2021 MEXTEND(MARK, 1);
2022 *++MARK = &PL_sv_undef;
2023 return MARK;
2024 }
2025 }
2026 else if (gimme == G_ARRAY) {
2027 /* in case LEAVE wipes old return values */
2028 while (++MARK <= SP) {
9a214eec 2029 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP
2030 *++newsp = *MARK;
2031 else {
2ec7f6f2
FC
2032 *++newsp = lvalue
2033 ? sv_2mortal(SvREFCNT_inc_simple_NN(*MARK))
2034 : sv_mortalcopy(*MARK);
b9d76716
VP
2035 TAINT_NOT; /* Each item is independent */
2036 }
2037 }
2038 /* When this function was called with MARK == newsp, we reach this
2039 * point with SP == newsp. */
2040 }
2041
2042 return newsp;
2043}
2044
2b9a6457
VP
2045PP(pp_enter)
2046{
20b7effb 2047 dSP;
eb578fdb 2048 PERL_CONTEXT *cx;
7c2d9d03 2049 I32 gimme = GIMME_V;
2b9a6457
VP
2050
2051 ENTER_with_name("block");
2052
2053 SAVETMPS;
2054 PUSHBLOCK(cx, CXt_BLOCK, SP);
2055
2056 RETURN;
2057}
2058
2059PP(pp_leave)
2060{
20b7effb 2061 dSP;
eb578fdb 2062 PERL_CONTEXT *cx;
2b9a6457
VP
2063 SV **newsp;
2064 PMOP *newpm;
2065 I32 gimme;
2066
2067 if (PL_op->op_flags & OPf_SPECIAL) {
2068 cx = &cxstack[cxstack_ix];
2069 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2070 }
2071
2072 POPBLOCK(cx,newpm);
2073
2074 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2075
2fc507dc 2076 SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP,
2ec7f6f2 2077 PL_op->op_private & OPpLVALUE);
2b9a6457
VP
2078 PL_curpm = newpm; /* Don't pop $1 et al till now */
2079
2080 LEAVE_with_name("block");
2081
2082 RETURN;
2083}
2084
eaa9f768
JH
2085static bool
2086S_outside_integer(pTHX_ SV *sv)
2087{
2088 if (SvOK(sv)) {
2089 const NV nv = SvNV_nomg(sv);
415b66b2
JH
2090 if (Perl_isinfnan(nv))
2091 return TRUE;
eaa9f768
JH
2092#ifdef NV_PRESERVES_UV
2093 if (nv < (NV)IV_MIN || nv > (NV)IV_MAX)
2094 return TRUE;
2095#else
2096 if (nv <= (NV)IV_MIN)
2097 return TRUE;
2098 if ((nv > 0) &&
2099 ((nv > (NV)UV_MAX ||
2100 SvUV_nomg(sv) > (UV)IV_MAX)))
2101 return TRUE;
2102#endif
2103 }
2104 return FALSE;
2105}
2106
a0d0e21e
LW
2107PP(pp_enteriter)
2108{
20b7effb 2109 dSP; dMARK;
eb578fdb 2110 PERL_CONTEXT *cx;
f54cb97a 2111 const I32 gimme = GIMME_V;
df530c37 2112 void *itervar; /* location of the iteration variable */
840fe433 2113 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2114
d343c3ef 2115 ENTER_with_name("loop1");
4633a7c4
LW
2116 SAVETMPS;
2117
aafca525
DM
2118 if (PL_op->op_targ) { /* "my" variable */
2119 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2120 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2121 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2122 SVs_PADSTALE, SVs_PADSTALE);
2123 }
09edbca0 2124 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
aafca525 2125 itervar = &PAD_SVl(PL_op->op_targ);
54b9620d 2126 }
d39c26a6 2127 else if (LIKELY(isGV(TOPs))) { /* symbol table variable */
159b6efe 2128 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2129 SV** svp = &GvSV(gv);
2130 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2131 *svp = newSV(0);
df530c37 2132 itervar = (void *)gv;
54b9620d 2133 }
d39c26a6
FC
2134 else {
2135 SV * const sv = POPs;
2136 assert(SvTYPE(sv) == SVt_PVMG);
2137 assert(SvMAGIC(sv));
2138 assert(SvMAGIC(sv)->mg_type == PERL_MAGIC_lvref);
2139 itervar = (void *)sv;
2140 cxtype |= CXp_FOR_LVREF;
2141 }
4633a7c4 2142
0d863452
RH
2143 if (PL_op->op_private & OPpITER_DEF)
2144 cxtype |= CXp_FOR_DEF;
2145
d343c3ef 2146 ENTER_with_name("loop2");
a0d0e21e 2147
7766f137 2148 PUSHBLOCK(cx, cxtype, SP);
df530c37 2149 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2150 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2151 SV *maybe_ary = POPs;
2152 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2153 dPOPss;
d01136d6 2154 SV * const right = maybe_ary;
d39c26a6
FC
2155 if (UNLIKELY(cxtype & CXp_FOR_LVREF))
2156 DIE(aTHX_ "Assigned value is not a reference");
984a4bea
RD
2157 SvGETMAGIC(sv);
2158 SvGETMAGIC(right);
4fe3f0fa 2159 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2160 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2161 cx->cx_type |= CXt_LOOP_LAZYIV;
2162 /* Make sure that no-one re-orders cop.h and breaks our
2163 assumptions */
2164 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
eaa9f768
JH
2165 if (S_outside_integer(aTHX_ sv) ||
2166 S_outside_integer(aTHX_ right))
076d9a11 2167 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2168 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2169 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2170#ifdef DEBUGGING
2171 /* for correct -Dstv display */
2172 cx->blk_oldsp = sp - PL_stack_base;
2173#endif
89ea2908 2174 }
3f63a782 2175 else {
d01136d6
BS
2176 cx->cx_type &= ~CXTYPEMASK;
2177 cx->cx_type |= CXt_LOOP_LAZYSV;
2178 /* Make sure that no-one re-orders cop.h and breaks our
2179 assumptions */
2180 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2181 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2182 cx->blk_loop.state_u.lazysv.end = right;
2183 SvREFCNT_inc(right);
2184 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2185 /* This will do the upgrade to SVt_PV, and warn if the value
2186 is uninitialised. */
10516c54 2187 (void) SvPV_nolen_const(right);
267cc4a8
NC
2188 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2189 to replace !SvOK() with a pointer to "". */
2190 if (!SvOK(right)) {
2191 SvREFCNT_dec(right);
d01136d6 2192 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2193 }
3f63a782 2194 }
89ea2908 2195 }
d01136d6 2196 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2197 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2198 SvREFCNT_inc(maybe_ary);
2199 cx->blk_loop.state_u.ary.ix =
2200 (PL_op->op_private & OPpITER_REVERSED) ?
2201 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2202 -1;
ef3e5ea9 2203 }
89ea2908 2204 }
d01136d6
BS
2205 else { /* iterating over items on the stack */
2206 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2207 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2208 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2209 }
2210 else {
d01136d6 2211 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2212 }
4633a7c4 2213 }
a0d0e21e
LW
2214
2215 RETURN;
2216}
2217
2218PP(pp_enterloop)
2219{
20b7effb 2220 dSP;
eb578fdb 2221 PERL_CONTEXT *cx;
f54cb97a 2222 const I32 gimme = GIMME_V;
a0d0e21e 2223
d343c3ef 2224 ENTER_with_name("loop1");
a0d0e21e 2225 SAVETMPS;
d343c3ef 2226 ENTER_with_name("loop2");
a0d0e21e 2227
3b719c58
NC
2228 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2229 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2230
2231 RETURN;
2232}
2233
2234PP(pp_leaveloop)
2235{
20b7effb 2236 dSP;
eb578fdb 2237 PERL_CONTEXT *cx;
a0d0e21e
LW
2238 I32 gimme;
2239 SV **newsp;
2240 PMOP *newpm;
2241 SV **mark;
2242
2243 POPBLOCK(cx,newpm);
3b719c58 2244 assert(CxTYPE_is_LOOP(cx));
4fdae800 2245 mark = newsp;
a8bba7fa 2246 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2247
2fc507dc 2248 SP = leave_common(newsp, SP, MARK, gimme, 0,
a373464f 2249 PL_op->op_private & OPpLVALUE);
f86702cc
PP
2250 PUTBACK;
2251
a8bba7fa 2252 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2253 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2254
d343c3ef
GG
2255 LEAVE_with_name("loop2");
2256 LEAVE_with_name("loop1");
a0d0e21e 2257
f86702cc 2258 return NORMAL;
a0d0e21e
LW
2259}
2260
31ccb4f5
DM
2261
2262/* This duplicates most of pp_leavesub, but with additional code to handle
2263 * return args in lvalue context. It was forked from pp_leavesub to
2264 * avoid slowing down that function any further.
2265 *
2266 * Any changes made to this function may need to be copied to pp_leavesub
2267 * and vice-versa.
57486a97
DM
2268 */
2269
31ccb4f5 2270PP(pp_leavesublv)
3bdf583b 2271{
57486a97
DM
2272 dSP;
2273 SV **newsp;
2274 SV **mark;
2275 PMOP *newpm;
2276 I32 gimme;
2277 PERL_CONTEXT *cx;
2278 SV *sv;
2279 bool ref;
a8fc6464 2280 const char *what = NULL;
57486a97 2281
1f0ba93b
DM
2282 if (CxMULTICALL(&cxstack[cxstack_ix])) {
2283 /* entry zero of a stack is always PL_sv_undef, which
2284 * simplifies converting a '()' return into undef in scalar context */
2285 assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef);
85ecf147 2286 return 0;
1f0ba93b 2287 }
85ecf147 2288
57486a97
DM
2289 POPBLOCK(cx,newpm);
2290 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
2291 TAINT_NOT;
2292
e80c4acf 2293 mark = newsp + 1;
57486a97
DM
2294
2295 ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2296 if (gimme == G_SCALAR) {
d25b0d7b
FC
2297 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2298 SV *sv;
e80c4acf
DM
2299 if (MARK <= SP) {
2300 assert(MARK == SP);
3885a45a 2301 if ((SvPADTMP(TOPs) || SvREADONLY(TOPs)) &&
d25b0d7b 2302 !SvSMAGICAL(TOPs)) {
001de122 2303 what =
d25b0d7b 2304 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2305 : "a readonly value" : "a temporary";
d25b0d7b 2306 }
001de122 2307 else goto copy_sv;
d25b0d7b
FC
2308 }
2309 else {
2310 /* sub:lvalue{} will take us here. */
001de122 2311 what = "undef";
d25b0d7b 2312 }
a8fc6464 2313 croak:
001de122 2314 LEAVE;
001de122 2315 POPSUB(cx,sv);
716436dc 2316 cxstack_ix--;
001de122
FC
2317 PL_curpm = newpm;
2318 LEAVESUB(sv);
2319 Perl_croak(aTHX_
2320 "Can't return %s from lvalue subroutine", what
2321 );
d25b0d7b 2322 }
e80c4acf 2323 if (MARK <= SP) {
a5ad7a5a 2324 copy_sv:
3bdf583b 2325 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2326 if (!SvPADTMP(*SP)) {
e80c4acf 2327 *MARK = SvREFCNT_inc(*SP);
3bdf583b 2328 FREETMPS;
e80c4acf 2329 sv_2mortal(*MARK);
5811c07e
FC
2330 }
2331 else {
2332 /* FREETMPS could clobber it */
2333 SV *sv = SvREFCNT_inc(*SP);
2334 FREETMPS;
e80c4acf 2335 *MARK = sv_mortalcopy(sv);
5811c07e
FC
2336 SvREFCNT_dec(sv);
2337 }
3bdf583b
FC
2338 }
2339 else
e80c4acf 2340 *MARK =
5811c07e
FC
2341 SvPADTMP(*SP)
2342 ? sv_mortalcopy(*SP)
2343 : !SvTEMP(*SP)
e08be60b
FC
2344 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2345 : *SP;
3bdf583b 2346 }
0d235c77 2347 else {
e80c4acf
DM
2348 MEXTEND(MARK, 0);
2349 *MARK = &PL_sv_undef;
0d235c77 2350 }
e80c4acf
DM
2351 SP = MARK;
2352
0e9700df 2353 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2354 SvGETMAGIC(TOPs);
2355 if (!SvOK(TOPs)) {
0e9700df 2356 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2357 }
2358 }
3bdf583b
FC
2359 }
2360 else if (gimme == G_ARRAY) {
0e9700df 2361 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2362 if (ref || !CxLVAL(cx))
e80c4acf
DM
2363 for (; MARK <= SP; MARK++)
2364 *MARK =
5811c07e 2365 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2366 ? sv_mortalcopy(*MARK)
5811c07e
FC
2367 : SvTEMP(*MARK)
2368 ? *MARK
80422e24 2369 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e80c4acf 2370 else for (; MARK <= SP; MARK++) {
d25b0d7b 2371 if (*MARK != &PL_sv_undef
3885a45a 2372 && (SvPADTMP(*MARK) || SvREADONLY(*MARK))
d25b0d7b 2373 ) {
d25b0d7b 2374 /* Might be flattened array after $#array = */
a8fc6464
DM
2375 what = SvREADONLY(*MARK)
2376 ? "a readonly value" : "a temporary";
2377 goto croak;
d25b0d7b 2378 }
e80c4acf
DM
2379 else if (!SvTEMP(*MARK))
2380 *MARK = sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2381 }
2382 }
e80c4acf 2383 PUTBACK;
57486a97
DM
2384
2385 LEAVE;
716436dc
DM
2386 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2387 cxstack_ix--;
57486a97
DM
2388 PL_curpm = newpm; /* ... and pop $1 et al */
2389 LEAVESUB(sv);
2390
2391 return cx->blk_sub.retop;
3bdf583b
FC
2392}
2393
57486a97 2394
a0d0e21e
LW
2395PP(pp_return)
2396{
20b7effb 2397 dSP; dMARK;
eb578fdb 2398 PERL_CONTEXT *cx;
617a4f41 2399 SV **oldsp;
0bd48802
AL
2400 const I32 cxix = dopoptosub(cxstack_ix);
2401
d40dc6b1
DM
2402 assert(cxstack_ix >= 0);
2403 if (cxix < cxstack_ix) {
2404 if (cxix < 0) {
2405 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2406 * sort block, which is a CXt_NULL
2407 * not a CXt_SUB */
2408 dounwind(0);
2409 /* if we were in list context, we would have to splice out
2410 * any junk before the return args, like we do in the general
2411 * pp_return case, e.g.
2412 * sub f { for (junk1, junk2) { return arg1, arg2 }}
2413 */
2414 assert(cxstack[0].blk_gimme == G_SCALAR);
2415 return 0;
2416 }
2417 else
2418 DIE(aTHX_ "Can't return outside a subroutine");
2419 }
a0d0e21e 2420 dounwind(cxix);
d40dc6b1 2421 }
a0d0e21e 2422
6228a1e1 2423 cx = &cxstack[cxix];
9850bf21 2424
a375ceca
DM
2425 oldsp = PL_stack_base + cx->blk_oldsp;
2426 if (oldsp != MARK) {
2427 /* Handle extra junk on the stack. For example,
2428 * for (1,2) { return 3,4 }
2429 * leaves 1,2,3,4 on the stack. In list context we
2430 * have to splice out the 1,2; In scalar context for
2431 * for (1,2) { return }
2432 * we need to set sp = oldsp so that pp_leavesub knows
2433 * to push &PL_sv_undef onto the stack.
2434 * Note that in pp_return we only do the extra processing
2435 * required to handle junk; everything else we leave to
2436 * pp_leavesub.
2437 */
2438 SSize_t nargs = SP - MARK;
2439 if (nargs) {
2440 if (cx->blk_gimme == G_ARRAY) {
2441 /* shift return args to base of call stack frame */
48344877 2442 Move(MARK + 1, oldsp + 1, nargs, SV*);
a375ceca 2443 PL_stack_sp = oldsp + nargs;
6228a1e1 2444 }
13929c4c 2445 }
a375ceca
DM
2446 else
2447 PL_stack_sp = oldsp;
2448 }
617a4f41
DM
2449
2450 /* fall through to a normal exit */
2451 switch (CxTYPE(cx)) {
2452 case CXt_EVAL:
2453 return CxTRYBLOCK(cx)
2454 ? Perl_pp_leavetry(aTHX)
2455 : Perl_pp_leaveeval(aTHX);
2456 case CXt_SUB:
13929c4c 2457 return CvLVALUE(cx->blk_sub.cv)
31ccb4f5 2458 ? Perl_pp_leavesublv(aTHX)
13929c4c 2459 : Perl_pp_leavesub(aTHX);
7766f137 2460 case CXt_FORMAT:
617a4f41 2461 return Perl_pp_leavewrite(aTHX);
a0d0e21e 2462 default:
5637ef5b 2463 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e 2464 }
a0d0e21e
LW
2465}
2466
4f443c3d 2467
1f039d60
FC
2468static I32
2469S_unwind_loop(pTHX_ const char * const opname)
a0d0e21e 2470{
a0d0e21e 2471 I32 cxix;
1f039d60
FC
2472 if (PL_op->op_flags & OPf_SPECIAL) {
2473 cxix = dopoptoloop(cxstack_ix);
2474 if (cxix < 0)
2475 /* diag_listed_as: Can't "last" outside a loop block */
2476 Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
2477 }
2478 else {
2479 dSP;
2480 STRLEN label_len;
2481 const char * const label =
2482 PL_op->op_flags & OPf_STACKED
2483 ? SvPV(TOPs,label_len)
2484 : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
2485 const U32 label_flags =
2486 PL_op->op_flags & OPf_STACKED
2487 ? SvUTF8(POPs)
2488 : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2489 PUTBACK;
2490 cxix = dopoptolabel(label, label_len, label_flags);
2491 if (cxix < 0)
2492 /* diag_listed_as: Label not found for "last %s" */
2493 Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
2494 opname,
2495 SVfARG(PL_op->op_flags & OPf_STACKED
2496 && !SvGMAGICAL(TOPp1s)
2497 ? TOPp1s
2498 : newSVpvn_flags(label,
2499 label_len,
2500 label_flags | SVs_TEMP)));
2501 }
2502 if (cxix < cxstack_ix)
2503 dounwind(cxix);
2504 return cxix;
2505}
2506
2507PP(pp_last)
2508{
eb578fdb 2509 PERL_CONTEXT *cx;
a0d0e21e 2510 I32 gimme;
b263a1ad 2511 OP *nextop = NULL;
a0d0e21e
LW
2512 SV **newsp;
2513 PMOP *newpm;
9d4ba2ae 2514
1f039d60 2515 S_unwind_loop(aTHX_ "last");
a0d0e21e
LW
2516
2517 POPBLOCK(cx,newpm);
5dd42e15 2518 cxstack_ix++; /* temporarily protect top context */
d3e5e568
DM
2519 assert(
2520 CxTYPE(cx) == CXt_LOOP_LAZYIV
2521 || CxTYPE(cx) == CXt_LOOP_LAZYSV
2522 || CxTYPE(cx) == CXt_LOOP_FOR
2523 || CxTYPE(cx) == CXt_LOOP_PLAIN
2524 );
2525 newsp = PL_stack_base + cx->blk_loop.resetsp;
2526 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2527
a1f49e72 2528 TAINT_NOT;
0c0c317c 2529 PL_stack_sp = newsp;
f86702cc 2530
5dd42e15
DM
2531 LEAVE;
2532 cxstack_ix--;
f86702cc 2533 /* Stack values are safe: */
d3e5e568
DM
2534 POPLOOP(cx); /* release loop vars ... */
2535 LEAVE;
3280af22 2536 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2537
9d4ba2ae 2538 PERL_UNUSED_VAR(gimme);
f86702cc 2539 return nextop;
a0d0e21e
LW
2540}
2541
2542PP(pp_next)
2543{
eb578fdb 2544 PERL_CONTEXT *cx;
1f039d60 2545 const I32 inner = PL_scopestack_ix;
a0d0e21e 2546
1f039d60 2547 S_unwind_loop(aTHX_ "next");
a0d0e21e 2548
85538317
GS
2549 /* clear off anything above the scope we're re-entering, but
2550 * save the rest until after a possible continue block */
1ba6ee2b 2551 TOPBLOCK(cx);
85538317
GS
2552 if (PL_scopestack_ix < inner)
2553 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2554 PL_curcop = cx->blk_oldcop;
47c9d59f 2555 PERL_ASYNC_CHECK();
d57ce4df 2556 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2557}
2558
2559PP(pp_redo)
2560{
1f039d60 2561 const I32 cxix = S_unwind_loop(aTHX_ "redo");
eb578fdb 2562 PERL_CONTEXT *cx;
a0d0e21e 2563 I32 oldsave;
1f039d60 2564 OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a0d0e21e 2565
a034e688
DM
2566 if (redo_op->op_type == OP_ENTER) {
2567 /* pop one less context to avoid $x being freed in while (my $x..) */
2568 cxstack_ix++;
2569 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2570 redo_op = redo_op->op_next;
2571 }
2572
a0d0e21e 2573 TOPBLOCK(cx);
3280af22 2574 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2575 LEAVE_SCOPE(oldsave);
936c78b5 2576 FREETMPS;
3a1b2b9e 2577 PL_curcop = cx->blk_oldcop;
47c9d59f 2578 PERL_ASYNC_CHECK();
a034e688 2579 return redo_op;
a0d0e21e
LW
2580}
2581
0824fdcb 2582STATIC OP *
5db1eb8d 2583S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2584{
a0d0e21e 2585 OP **ops = opstack;
a1894d81 2586 static const char* const too_deep = "Target of goto is too deeply nested";
a0d0e21e 2587
7918f24d
NC
2588 PERL_ARGS_ASSERT_DOFINDLABEL;
2589
fc36a67e 2590 if (ops >= oplimit)
0157ef98 2591 Perl_croak(aTHX_ "%s", too_deep);
11343788
MB
2592 if (o->op_type == OP_LEAVE ||
2593 o->op_type == OP_SCOPE ||
2594 o->op_type == OP_LEAVELOOP ||
33d34e4c 2595 o->op_type == OP_LEAVESUB ||
11343788 2596 o->op_type == OP_LEAVETRY)
fc36a67e 2597 {
5dc0d613 2598 *ops++ = cUNOPo->op_first;
fc36a67e 2599 if (ops >= oplimit)
0157ef98 2600 Perl_croak(aTHX_ "%s", too_deep);
fc36a67e 2601 }
c4aa4e48 2602 *ops = 0;
11343788 2603 if (o->op_flags & OPf_KIDS) {
aec46f14 2604 OP *kid;
a0d0e21e 2605 /* First try all the kids at this level, since that's likeliest. */
e6dae479 2606 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
7e8f1eac 2607 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF
2608 STRLEN kid_label_len;
2609 U32 kid_label_flags;
2610 const char *kid_label = CopLABEL_len_flags(kCOP,
2611 &kid_label_len, &kid_label_flags);
2612 if (kid_label && (
2613 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2614 (flags & SVf_UTF8)
2615 ? (bytes_cmp_utf8(
2616 (const U8*)kid_label, kid_label_len,
2617 (const U8*)label, len) == 0)
2618 : (bytes_cmp_utf8(
2619 (const U8*)label, len,
2620 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF
2621 : ( len == kid_label_len && ((kid_label == label)
2622 || memEQ(kid_label, label, len)))))
7e8f1eac
AD
2623 return kid;
2624 }
a0d0e21e 2625 }
e6dae479 2626 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
3280af22 2627 if (kid == PL_lastgotoprobe)
a0d0e21e 2628 continue;
ed8d0fe2
SM
2629 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2630 if (ops == opstack)
2631 *ops++ = kid;
2632 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2633 ops[-1]->op_type == OP_DBSTATE)
2634 ops[-1] = kid;
2635 else
2636 *ops++ = kid;
2637 }
5db1eb8d 2638 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2639 return o;
a0d0e21e
LW
2640 }
2641 }
c4aa4e48 2642 *ops = 0;
a0d0e21e
LW
2643 return 0;
2644}
2645
b1c05ba5
DM
2646
2647/* also used for: pp_dump() */
2648
2649PP(pp_goto)
a0d0e21e 2650{
27da23d5 2651 dVAR; dSP;
cbbf8932 2652 OP *retop = NULL;
a0d0e21e 2653 I32 ix;
eb578fdb 2654 PERL_CONTEXT *cx;
fc36a67e
PP
2655#define GOTO_DEPTH 64
2656 OP *enterops[GOTO_DEPTH];
cbbf8932 2657 const char *label = NULL;
5db1eb8d
BF
2658 STRLEN label_len = 0;
2659 U32 label_flags = 0;
bfed75c6 2660 const bool do_dump = (PL_op->op_type == OP_DUMP);
a1894d81 2661 static const char* const must_have_label = "goto must have label";
a0d0e21e 2662
533c011a 2663 if (PL_op->op_flags & OPf_STACKED) {
7d1d69cb
DM
2664 /* goto EXPR or goto &foo */
2665
9d4ba2ae 2666 SV * const sv = POPs;
55b37f1c 2667 SvGETMAGIC(sv);
a0d0e21e
LW
2668
2669 /* This egregious kludge implements goto &subroutine */
2670 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2671 I32 cxix;
eb578fdb 2672 PERL_CONTEXT *cx;
ea726b52 2673 CV *cv = MUTABLE_CV(SvRV(sv));
049bd5ff 2674 AV *arg = GvAV(PL_defgv);
a0d0e21e
LW
2675 I32 oldsave;
2676
e8f7dd13 2677 retry:
4aa0a1f7 2678 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2679 const GV * const gv = CvGV(cv);
e8f7dd13 2680 if (gv) {
7fc63493 2681 GV *autogv;
e8f7dd13
GS
2682 SV *tmpstr;
2683 /* autoloaded stub? */
2684 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2685 goto retry;
c271df94
BF
2686 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2687 GvNAMELEN(gv),
2688 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2689 if (autogv && (cv = GvCV(autogv)))
2690 goto retry;
2691 tmpstr = sv_newmortal();
c445ea15 2692 gv_efullname3(tmpstr, gv, NULL);
be2597df 2693 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2694 }
cea2e8a9 2695 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2696 }
2697
a0d0e21e 2698 /* First do some returnish stuff. */
b37c2d43 2699 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2700 FREETMPS;
a0d0e21e 2701 cxix = dopoptosub(cxstack_ix);
8da3792e
SM
2702 if (cxix < cxstack_ix) {
2703 if (cxix < 0) {
2704 SvREFCNT_dec(cv);
2705 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2706 }
a0d0e21e 2707 dounwind(cxix);
8da3792e 2708 }
a0d0e21e 2709 TOPBLOCK(cx);
2d43a17f 2710 SPAGAIN;
564abe23 2711 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2712 if (CxTYPE(cx) == CXt_EVAL) {
110af908 2713 SvREFCNT_dec(cv);
c74ace89 2714 if (CxREALEVAL(cx))
00455a92 2715 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM
2716 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2717 else
00455a92 2718 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2719 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2720 }
9850bf21 2721 else if (CxMULTICALL(cx))
110af908
FC
2722 {
2723 SvREFCNT_dec(cv);
9850bf21 2724 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
110af908 2725 }
39de75fd
DM
2726
2727 /* partial unrolled POPSUB(): */
2728
bafb2adc 2729 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
a0d0e21e 2730 AV* av = cx->blk_sub.argarray;
bfed75c6 2731
049bd5ff
FC
2732 /* abandon the original @_ if it got reified or if it is
2733 the same as the current @_ */
2734 if (AvREAL(av) || av == arg) {
b1464ded 2735 SvREFCNT_dec(av);
d8b46c1b 2736 av = newAV();
11ca45c0 2737 AvREIFY_only(av);
ad64d0ec 2738 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2739 }
049bd5ff 2740 else CLEAR_ARGARRAY(av);
a0d0e21e 2741 }
88c11d84 2742
049bd5ff
FC
2743 /* We donate this refcount later to the callee’s pad. */
2744 SvREFCNT_inc_simple_void(arg);
88c11d84
DM
2745
2746 assert(PL_scopestack_ix == cx->blk_oldscopesp);
2747 oldsave = PL_scopestack[cx->blk_oldscopesp - 1];
2748 LEAVE_SCOPE(oldsave);
b1e25d05
DM
2749
2750 /* don't restore PL_comppad here. It won't be needed if the
2751 * sub we're going to is non-XS, but restoring it early then
2752 * croaking (e.g. the "Goto undefined subroutine" below)
2753 * means the CX block gets processed again in dounwind,
2754 * but this time with the wrong PL_comppad */
88c11d84 2755
1d59c038
FC
2756 /* A destructor called during LEAVE_SCOPE could have undefined
2757 * our precious cv. See bug #99850. */
2758 if (!CvROOT(cv) && !CvXSUB(cv)) {
2759 const GV * const gv = CvGV(cv);
049bd5ff 2760 SvREFCNT_dec(arg);
1d59c038
FC
2761 if (gv) {
2762 SV * const tmpstr = sv_newmortal();
2763 gv_efullname3(tmpstr, gv, NULL);
2764 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2765 SVfARG(tmpstr));
2766 }
2767 DIE(aTHX_ "Goto undefined subroutine");
2768 }
2769
cd17cc2e
DM
2770 if (CxTYPE(cx) == CXt_SUB) {
2771 CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth;
2772 SvREFCNT_dec_NN(cx->blk_sub.cv);
2773 }
2774
a0d0e21e
LW
2775 /* Now do some callish stuff. */
2776 SAVETMPS;
5023d17a 2777 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2778 if (CvISXSUB(cv)) {
cb65b687
DM
2779 SV **newsp;
2780 I32 gimme;
ad39f3a2 2781 const SSize_t items = arg ? AvFILL(arg) + 1 : 0;
cd313eb4 2782 const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0;
049bd5ff
FC
2783 SV** mark;
2784
cb65b687
DM
2785 PERL_UNUSED_VAR(newsp);
2786 PERL_UNUSED_VAR(gimme);
2787
049bd5ff 2788 /* put GvAV(defgv) back onto stack */
8c9d3376
FC
2789 if (items) {
2790 EXTEND(SP, items+1); /* @_ could have been extended. */
8c9d3376 2791 }
049bd5ff 2792 mark = SP;
ad39f3a2 2793 if (items) {
de935cc9 2794 SSize_t index;
ad39f3a2 2795 bool r = cBOOL(AvREAL(arg));
b1464ded 2796 for (index=0; index<items; index++)
ad39f3a2
FC
2797 {
2798 SV *sv;
2799 if (m) {
2800 SV ** const svp = av_fetch(arg, index, 0);
2801 sv = svp ? *svp : NULL;
dd2a7f90 2802 }
ad39f3a2
FC
2803 else sv = AvARRAY(arg)[index];
2804 SP[index+1] = sv
2805 ? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv
2806 : sv_2mortal(newSVavdefelem(arg, index, 1));
2807 }
049bd5ff 2808 }
ad39f3a2 2809 SP += items;
049bd5ff
FC
2810 SvREFCNT_dec(arg);
2811 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
2812 /* Restore old @_ */
2813 arg = GvAV(PL_defgv);
2814 GvAV(PL_defgv) = cx->blk_sub.savearray;
2815 SvREFCNT_dec(arg);
b1464ded 2816 }
1fa4e549 2817
51eb35b5 2818 retop = cx->blk_sub.retop;
b1e25d05
DM
2819 PL_comppad = cx->blk_sub.prevcomppad;
2820 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL;
b37c2d43
AL
2821 /* XS subs don't have a CxSUB, so pop it */
2822 POPBLOCK(cx, PL_curpm);
2823 /* Push a mark for the start of arglist */
2824 PUSHMARK(mark);
2825 PUTBACK;
2826 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2827 LEAVE;
51eb35b5 2828 goto _return;
a0d0e21e
LW
2829 }
2830 else {
b70d5558 2831 PADLIST * const padlist = CvPADLIST(cv);
39de75fd
DM
2832
2833 /* partial unrolled PUSHSUB(): */
2834
a0d0e21e 2835 cx->blk_sub.cv = cv;
1a5b3db4 2836 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2837
a0d0e21e 2838 CvDEPTH(cv)++;
2c50b7ed
DM
2839 SvREFCNT_inc_simple_void_NN(cv);
2840 if (CvDEPTH(cv) > 1) {
2b9dff67 2841 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2842 sub_crush_depth(cv);
26019298 2843 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2844 }
426a09cd 2845 PL_curcop = cx->blk_oldcop;
fd617465 2846 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2847 if (CxHASARGS(cx))
6d4ff0d2 2848 {
049bd5ff
FC
2849 /* cx->blk_sub.argarray has no reference count, so we
2850 need something to hang on to our argument array so
2851 that cx->blk_sub.argarray does not end up pointing
2852 to freed memory as the result of undef *_. So put
2853 it in the callee’s pad, donating our refer-
2854 ence count. */
bfa371b6
FC
2855 if (arg) {
2856 SvREFCNT_dec(PAD_SVl(0));
fed4514a 2857 PAD_SVl(0) = (SV *)arg;
bfa371b6 2858 }
fed4514a 2859 cx->blk_sub.argarray = (AV*)PAD_SVl(0);
049bd5ff
FC
2860
2861 /* GvAV(PL_defgv) might have been modified on scope
2862 exit, so restore it. */
2863 if (arg != GvAV(PL_defgv)) {
2864 AV * const av = GvAV(PL_defgv);
2865 GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg);
2866 SvREFCNT_dec(av);
a0d0e21e
LW
2867 }
2868 }
049bd5ff 2869 else SvREFCNT_dec(arg);
491527d0 2870 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2871 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2872 if (PERLDB_GOTO) {
b96d8cd9 2873 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2874 if (gotocv) {
2875 PUSHMARK( PL_stack_sp );
ad64d0ec 2876 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2877 PL_stack_sp--;
2878 }
491527d0 2879 }
1ce6579f 2880 }
51eb35b5
DD
2881 retop = CvSTART(cv);
2882 goto putback_return;
a0d0e21e
LW
2883 }
2884 }
1614b0e3 2885 else {
7d1d69cb 2886 /* goto EXPR */
55b37f1c 2887 label = SvPV_nomg_const(sv, label_len);
5db1eb8d 2888 label_flags = SvUTF8(sv);
1614b0e3 2889 }
a0d0e21e 2890 }
2fc690dc 2891 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
7d1d69cb 2892 /* goto LABEL or dump LABEL */
5db1eb8d
BF
2893 label = cPVOP->op_pv;
2894 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2895 label_len = strlen(label);
2896 }
0157ef98 2897 if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label);
a0d0e21e 2898
f410a211
NC
2899 PERL_ASYNC_CHECK();
2900
3532f34a 2901 if (label_len) {
cbbf8932 2902 OP *gotoprobe = NULL;
3b2447bc 2903 bool leaving_eval = FALSE;
33d34e4c 2904 bool in_block = FALSE;
cbbf8932 2905 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2906
2907 /* find label */
2908
d4c19fe8 2909 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2910 *enterops = 0;
2911 for (ix = cxstack_ix; ix >= 0; ix--) {
2912 cx = &cxstack[ix];
6b35e009 2913 switch (CxTYPE(cx)) {
a0d0e21e 2914 case CXt_EVAL:
3b2447bc 2915 leaving_eval = TRUE;
971ecbe6 2916 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2917 gotoprobe = (last_eval_cx ?
2918 last_eval_cx->blk_eval.old_eval_root :
2919 PL_eval_root);
2920 last_eval_cx = cx;
9c5794fe
RH
2921 break;
2922 }
2923 /* else fall through */
c6fdafd0 2924 case CXt_LOOP_LAZYIV:
d01136d6 2925 case CXt_LOOP_LAZYSV:
3b719c58
NC
2926 case CXt_LOOP_FOR:
2927 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2928 case CXt_GIVEN:
2929 case CXt_WHEN:
e6dae479 2930 gotoprobe = OpSIBLING(cx->blk_oldcop);
a0d0e21e
LW
2931 break;
2932 case CXt_SUBST:
2933 continue;
2934 case CXt_BLOCK:
33d34e4c 2935 if (ix) {
e6dae479 2936 gotoprobe = OpSIBLING(cx->blk_oldcop);
33d34e4c
AE
2937 in_block = TRUE;
2938 } else
3280af22 2939 gotoprobe = PL_main_root;
a0d0e21e 2940 break;
b3933176 2941 case CXt_SUB:
9850bf21 2942 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2943 gotoprobe = CvROOT(cx->blk_sub.cv);
2944 break;
2945 }
924ba076 2946 /* FALLTHROUGH */
7766f137 2947 case CXt_FORMAT:
0a753a76 2948 case CXt_NULL:
a651a37d 2949 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2950 default:
2951 if (ix)
5637ef5b
NC
2952 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
2953 CxTYPE(cx), (long) ix);
3280af22 2954 gotoprobe = PL_main_root;
a0d0e21e
LW
2955 break;
2956 }
2b597662 2957 if (gotoprobe) {
29e61fd9
DM
2958 OP *sibl1, *sibl2;
2959
5db1eb8d 2960 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS
2961 enterops, enterops + GOTO_DEPTH);
2962 if (retop)
2963 break;
e6dae479 2964 if ( (sibl1 = OpSIBLING(gotoprobe)) &&
29e61fd9 2965 sibl1->op_type == OP_UNSTACK &&
e6dae479 2966 (sibl2 = OpSIBLING(sibl1)))
29e61fd9
DM
2967 {
2968 retop = dofindlabel(sibl2,
5db1eb8d
BF
2969 label, label_len, label_flags, enterops,
2970 enterops + GOTO_DEPTH);
eae48c89
Z
2971 if (retop)
2972 break;
2973 }
2b597662 2974 }
3280af22 2975 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2976 }
2977 if (!retop)
b17a0679
FC
2978 DIE(aTHX_ "Can't find label %"UTF8f,
2979 UTF8fARG(label_flags, label_len, label));
a0d0e21e 2980
3b2447bc
RH
2981 /* if we're leaving an eval, check before we pop any frames
2982 that we're not going to punt, otherwise the error
2983 won't be caught */
2984
2985 if (leaving_eval && *enterops && enterops[1]) {
2986 I32 i;
2987 for (i = 1; enterops[i]; i++)
2988 if (enterops[i]->op_type == OP_ENTERITER)
2989 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2990 }
2991
b500e03b
GG
2992 if (*enterops && enterops[1]) {
2993 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2994 if (enterops[i])
2995 deprecate("\"goto\" to jump into a construct");
2996 }
2997
a0d0e21e
LW
2998 /* pop unwanted frames */
2999
3000 if (ix < cxstack_ix) {
3001 I32 oldsave;
3002
3003 if (ix < 0)
5edb7975 3004 DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix);
a0d0e21e
LW
3005 dounwind(ix);
3006 TOPBLOCK(cx);
3280af22 3007 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3008 LEAVE_SCOPE(oldsave);
3009 }
3010
3011 /* push wanted frames */
3012
748a9306 3013 if (*enterops && enterops[1]) {
0bd48802 3014 OP * const oldop = PL_op;
33d34e4c
AE
3015 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3016 for (; enterops[ix]; ix++) {
533c011a 3017 PL_op = enterops[ix];
84902520
TB
3018 /* Eventually we may want to stack the needed arguments
3019 * for each op. For now, we punt on the hard ones. */
533c011a 3020 if (PL_op->op_type == OP_ENTERITER)
894356b3 3021 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3022 PL_op->op_ppaddr(aTHX);
a0d0e21e 3023 }
533c011a 3024 PL_op = oldop;
a0d0e21e
LW
3025 }
3026 }
3027
2631bbca 3028 if (do_dump) {
a5f75d66 3029#ifdef VMS
6b88bc9c 3030 if (!retop) retop = PL_main_start;
a5f75d66 3031#endif
3280af22
NIS
3032 PL_restartop = retop;
3033 PL_do_undump = TRUE;
a0d0e21e
LW
3034
3035 my_unexec();
3036
3280af22
NIS
3037 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3038 PL_do_undump = FALSE;
a0d0e21e
LW
3039 }
3040
51eb35b5
DD
3041 putback_return:
3042 PL_stack_sp = sp;
3043 _return:
47c9d59f 3044 PERL_ASYNC_CHECK();
51eb35b5 3045 return retop;
a0d0e21e
LW
3046}
3047
3048PP(pp_exit)
3049{
39644a26 3050 dSP;
a0d0e21e
LW
3051 I32 anum;
3052
3053 if (MAXARG < 1)
3054 anum = 0;
9d3c658e
FC
3055 else if (!TOPs) {
3056 anum = 0; (void)POPs;
3057 }
ff0cee69 3058 else {
a0d0e21e 3059 anum = SvIVx(POPs);
d98f61e7 3060#ifdef VMS
5450b4d8
FC
3061 if (anum == 1
3062 && SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0)))
ff0cee69 3063 anum = 0;
97124ef6
FC
3064 VMSISH_HUSHED =
3065 VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3066#endif
3067 }
cc3604b1 3068 PL_exit_flags |= PERL_EXIT_EXPECTED;
a0d0e21e 3069 my_exit(anum);
3280af22 3070 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3071 RETURN;
3072}
3073
a0d0e21e
LW
3074/* Eval. */
3075
0824fdcb 3076STATIC void
cea2e8a9 3077S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3078{
504618e9 3079 const char *s = SvPVX_const(sv);
890ce7af 3080 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3081 I32 line = 1;
a0d0e21e 3082
7918f24d
NC
3083 PERL_ARGS_ASSERT_SAVE_LINES;
3084
a0d0e21e 3085 while (s && s < send) {
f54cb97a 3086 const char *t;
b9f83d2f 3087 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3088
1d963ff3 3089 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3090 if (t)
3091 t++;
3092 else
3093 t = send;
3094
3095 sv_setpvn(tmpstr, s, t - s);
3096 av_store(array, line++, tmpstr);
3097 s = t;
3098 }
3099}
3100
22f16304
RU
3101/*
3102=for apidoc docatch
3103
3104Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3105
31060 is used as continue inside eval,
3107
31083 is used for a die caught by an inner eval - continue inner loop
3109
75af9d73 3110See F<cop.h>: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
22f16304
RU
3111establish a local jmpenv to handle exception traps.
3112
3113=cut
3114*/
0824fdcb 3115STATIC OP *
cea2e8a9 3116S_docatch(pTHX_ OP *o)
1e422769 3117{
6224f72b 3118 int ret;
06b5626a 3119 OP * const oldop = PL_op;
db36c5a1 3120 dJMPENV;
1e422769 3121
1e422769 3122#ifdef DEBUGGING
54310121 3123 assert(CATCH_GET == TRUE);
1e422769 3124#endif
312caa8e 3125 PL_op = o;
8bffa5f8 3126
14dd3ad8 3127 JMPENV_PUSH(ret);
6224f72b 3128 switch (ret) {
312caa8e 3129 case 0:
abd70938
DM
3130 assert(cxstack_ix >= 0);
3131 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3132 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3133 redo_body:
85aaa934 3134 CALLRUNOPS(aTHX);
312caa8e
CS
3135 break;
3136 case 3:
8bffa5f8 3137 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3138 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3139 PL_restartjmpenv = NULL;
312caa8e
CS
3140 PL_op = PL_restartop;
3141 PL_restartop = 0;
3142 goto redo_body;
3143 }
924ba076 3144 /* FALLTHROUGH */
312caa8e 3145 default:
14dd3ad8 3146 JMPENV_POP;
533c011a 3147 PL_op = oldop;
6224f72b 3148 JMPENV_JUMP(ret);
e5964223 3149 NOT_REACHED; /* NOTREACHED */
1e422769 3150 }
14dd3ad8 3151 JMPENV_POP;
533c011a 3152 PL_op = oldop;
5f66b61c 3153 return NULL;
1e422769
PP
3154}
3155
a3985cdc
DM
3156
3157/*
3158=for apidoc find_runcv
3159
3160Locate the CV corresponding to the currently executing sub or eval.
796b6530
KW
3161If C<db_seqp> is non_null, skip CVs that are in the DB package and populate
3162C<*db_seqp> with the cop sequence number at the point that the DB:: code was
72d33970
FC
3163entered. (This allows debuggers to eval in the scope of the breakpoint
3164rather than in the scope of the debugger itself.)
a3985cdc
DM
3165
3166=cut
3167*/
3168
3169CV*
d819b83a 3170Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3171{
db4cf31d 3172 return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp);
70794f7b
FC
3173}
3174
3175/* If this becomes part of the API, it might need a better name. */
3176CV *
db4cf31d 3177Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp)
70794f7b 3178{
a3985cdc 3179 PERL_SI *si;
b4b0692a 3180 int level = 0;
a3985cdc 3181
d819b83a 3182 if (db_seqp)
c3923c33
DM
3183 *db_seqp =
3184 PL_curcop == &PL_compiling
3185 ? PL_cop_seqmax
3186 : PL_curcop->cop_seq;
3187
a3985cdc 3188 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3189 I32 ix;
a3985cdc 3190 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3191 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
70794f7b 3192 CV *cv = NULL;
d819b83a 3193 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
70794f7b 3194 cv = cx->blk_sub.cv;
d819b83a
DM
3195 /* skip DB:: code */
3196 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3197 *db_seqp = cx->blk_oldcop->cop_seq;
3198 continue;
3199 }
a453e28a
DM
3200 if (cx->cx_type & CXp_SUB_RE)
3201 continue;
d819b83a 3202 }
a3985cdc 3203 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
70794f7b
FC
3204 cv = cx->blk_eval.cv;
3205 if (cv) {
3206 switch (cond) {
db4cf31d
FC
3207 case FIND_RUNCV_padid_eq:
3208 if (!CvPADLIST(cv)
b4db5868 3209 || CvPADLIST(cv)->xpadl_id != (U32)arg)
8771da69 3210 continue;
b4b0692a
FC
3211 return cv;
3212 case FIND_RUNCV_level_eq:
db4cf31d 3213 if (level++ != arg) continue;
70794f7b
FC
3214 /* GERONIMO! */
3215 default:
3216 return cv;
3217 }
3218 }
a3985cdc
DM
3219 }
3220 }
db4cf31d 3221 return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv;
a3985cdc
DM
3222}
3223
3224
27e90453
DM
3225/* Run yyparse() in a setjmp wrapper. Returns:
3226 * 0: yyparse() successful
3227 * 1: yyparse() failed
3228 * 3: yyparse() died
3229 */
3230STATIC int
28ac2b49 3231S_try_yyparse(pTHX_ int gramtype)
27e90453
DM
3232{
3233 int ret;
3234 dJMPENV;
3235
3236 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3237 JMPENV_PUSH(ret);
3238 switch (ret) {
3239 case 0:
28ac2b49 3240 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM
3241 break;
3242 case 3:
3243 break;
3244 default:
3245 JMPENV_POP;
3246 JMPENV_JUMP(ret);
e5964223 3247 NOT_REACHED; /* NOTREACHED */
27e90453
DM
3248 }
3249 JMPENV_POP;
3250 return ret;
3251}
3252
3253
104a8185
DM
3254/* Compile a require/do or an eval ''.
3255 *
a3985cdc 3256 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM
3257 * seq is the current COP scope value.
3258 * hh is the saved hints hash, if any.
3259 *
410be5db 3260 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM
3261 * PL_eval_start contains the first op of the compiled code; otherwise,
3262 * pushes undef.
3263 *
3264 * This function is called from two places: pp_require and pp_entereval.
3265 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC
3266 */
3267
410be5db 3268STATIC bool
104a8185 3269S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3270{
20b7effb 3271 dSP;
46c461b5 3272 OP * const saveop = PL_op;
104a8185 3273 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3274 COP * const oldcurcop = PL_curcop;
26c9400e 3275 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3276 int yystatus;
676a678a 3277 CV *evalcv;
a0d0e21e 3278
27e90453 3279 PL_in_eval = (in_require
6dc8a9e4 3280 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
a1941760
DM
3281 : (EVAL_INEVAL |
3282 ((PL_op->op_private & OPpEVAL_RE_REPARSING)
3283 ? EVAL_RE_REPARSING : 0)));
a0d0e21e 3284
1ce6579f
PP
3285 PUSHMARK(SP);
3286
676a678a
Z
3287 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3288 CvEVAL_on(evalcv);
2090ab20 3289 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3290 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3291 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3292
676a678a
Z
3293 CvOUTSIDE_SEQ(evalcv) = seq;
3294 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3295
dd2155a4 3296 /* set up a scratch pad */
a0d0e21e 3297
eacbb379 3298 CvPADLIST_set(evalcv, pad_new(padnew_SAVE));
cecbe010 3299 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3300
07055b4c 3301
b5bbe64a 3302 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3303
a0d0e21e
LW
3304 /* make sure we compile in the right package */
3305
ed094faf 3306 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026 3307 SAVEGENERICSV(PL_curstash);
cb1ad50e
FC
3308 PL_curstash = (HV *)CopSTASH(PL_curcop);
3309 if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL;
3310 else SvREFCNT_inc_simple_void(PL_curstash);
a0d0e21e 3311 }
3c10abe3 3312 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3313 SAVESPTR(PL_beginav);
3314 PL_beginav = newAV();
3315 SAVEFREESV(PL_beginav);
3c10abe3
AG
3316 SAVESPTR(PL_unitcheckav);
3317 PL_unitcheckav = newAV();
3318 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3319
81d86705 3320
104a8185 3321 ENTER_with_name("evalcomp");
676a678a
Z
3322 SAVESPTR(PL_compcv);
3323 PL_compcv = evalcv;
3324
a0d0e21e
LW
3325 /* try to compile it */
3326
5f66b61c 3327 PL_eval_root = NULL;
3280af22 3328 PL_curcop = &PL_compiling;
26c9400e 3329 if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3330 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3331 else
3332 CLEAR_ERRSV();
27e90453 3333
377b5421
DM
3334 SAVEHINTS();
3335 if (clear_hints) {
3336 PL_hints = 0;
3337 hv_clear(GvHV(PL_hintgv));
3338 }
3339 else {
3340 PL_hints = saveop->op_private & OPpEVAL_COPHH
3341 ? oldcurcop->cop_hints : saveop->op_targ;
4f3e2518
DM
3342
3343 /* making 'use re eval' not be in scope when compiling the
3344 * qr/mabye_has_runtime_code_block/ ensures that we don't get
3345 * infinite recursion when S_has_runtime_code() gives a false
3346 * positive: the second time round, HINT_RE_EVAL isn't set so we
3347 * don't bother calling S_has_runtime_code() */
3348 if (PL_in_eval & EVAL_RE_REPARSING)
3349 PL_hints &= ~HINT_RE_EVAL;
3350
377b5421
DM
3351 if (hh) {
3352 /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */
3353 SvREFCNT_dec(GvHV(PL_hintgv));
3354 GvHV(PL_hintgv) = hh;
3355 }
3356 }
3357 SAVECOMPILEWARNINGS();
3358 if (clear_hints) {
3359 if (PL_dowarn & G_WARN_ALL_ON)
3360 PL_compiling.cop_warnings = pWARN_ALL ;
3361 else if (PL_dowarn & G_WARN_ALL_OFF)
3362 PL_compiling.cop_warnings = pWARN_NONE ;
3363 else
3364 PL_compiling.cop_warnings = pWARN_STD ;
3365 }
3366 else {
3367 PL_compiling.cop_warnings =
3368 DUP_WARNINGS(oldcurcop->cop_warnings);
3369 cophh_free(CopHINTHASH_get(&PL_compiling));
3370 if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) {
3371 /* The label, if present, is the first entry on the chain. So rather
3372 than writing a blank label in front of it (which involves an
3373 allocation), just use the next entry in the chain. */
3374 PL_compiling.cop_hints_hash
3375 = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next);
3376 /* Check the assumption that this removed the label. */
3377 assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL);
f45b078d 3378 }
377b5421
DM
3379 else
3380 PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash);
3381 }
f45b078d 3382
a88d97bf 3383 CALL_BLOCK_HOOKS(bhk_eval, saveop);
52db365a 3384
27e90453
DM
3385 /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
3386 * so honour CATCH_GET and trap it here if necessary */
3387
28ac2b49 3388 yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG);
27e90453
DM
3389
3390 if (yystatus || PL_parser->error_count || !PL_eval_root) {
0c58d367 3391 SV **newsp; /* Used by POPBLOCK. */
d164302a 3392 PERL_CONTEXT *cx;
27e90453 3393 I32 optype; /* Used by POPEVAL. */
d164302a 3394 SV *namesv;
eed484f9 3395 SV *errsv = NULL;
bfed75c6 3396
d164302a
GG
3397 cx = NULL;
3398 namesv = NULL;
27e90453
DM
3399 PERL_UNUSED_VAR(newsp);
3400 PERL_UNUSED_VAR(optype);
3401
c86ffc32
DM
3402 /* note that if yystatus == 3, then the EVAL CX block has already
3403 * been popped, and various vars restored */
533c011a 3404 PL_op = saveop;
27e90453 3405 if (yystatus != 3) {
c86ffc32
DM
3406 if (PL_eval_root) {
3407 op_free(PL_eval_root);
3408 PL_eval_root = NULL;
3409 }
27e90453 3410 SP = PL_stack_base + POPMARK; /* pop original mark */
377b5421
DM
3411 POPBLOCK(cx,PL_curpm);
3412 POPEVAL(cx);
3413 namesv = cx->blk_eval.old_namesv;
bbde7ba3 3414 /* POPBLOCK renders LEAVE_with_name("evalcomp") unnecessary. */
27e90453 3415 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
cd6472fc 3416 }
9d4ba2ae 3417
eed484f9 3418 errsv = ERRSV;
27e90453 3419 if (in_require) {
b6494f15</