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Fix off-by-one: avoid allocating an extra context
[perl5.git] / cop.h
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a0d0e21e 1/* cop.h
79072805 2 *
1129b882 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
8622e0e2 4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
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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 *
8622e0e2
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9 * Control ops (cops) are one of the two ops OP_NEXTSTATE and OP_DBSTATE,
10 * that (loosely speaking) are separate statements.
3ffa1527
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11 * They hold information important for lexical state and error reporting.
12 * At run time, PL_curcop is set to point to the most recently executed cop,
a3985cdc 13 * and thus can be used to determine our current state.
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14 */
15
0d2925a6 16/* A jmpenv packages the state required to perform a proper non-local jump.
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17 * Note that there is a PL_start_env initialized when perl starts, and
18 * PL_top_env points to this initially, so PL_top_env should always be
19 * non-null.
0d2925a6 20 *
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21 * Existence of a non-null PL_top_env->je_prev implies it is valid to call
22 * longjmp() at that runlevel (we make sure PL_start_env.je_prev is always
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23 * null to ensure this).
24 *
25 * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
26 * establish a local jmpenv to handle exception traps. Care must be taken
27 * to restore the previous value of je_mustcatch before exiting the
28 * stack frame iff JMPENV_PUSH was not called in that stack frame.
29 * GSAR 97-03-27
30 */
31
32struct jmpenv {
33 struct jmpenv * je_prev;
34 Sigjmp_buf je_buf; /* only for use if !je_throw */
35 int je_ret; /* last exception thrown */
36 bool je_mustcatch; /* need to call longjmp()? */
37};
38
39typedef struct jmpenv JMPENV;
40
41#ifdef OP_IN_REGISTER
42#define OP_REG_TO_MEM PL_opsave = op
43#define OP_MEM_TO_REG op = PL_opsave
44#else
45#define OP_REG_TO_MEM NOOP
46#define OP_MEM_TO_REG NOOP
47#endif
48
49/*
50 * How to build the first jmpenv.
51 *
52 * top_env needs to be non-zero. It points to an area
53 * in which longjmp() stuff is stored, as C callstack
54 * info there at least is thread specific this has to
55 * be per-thread. Otherwise a 'die' in a thread gives
56 * that thread the C stack of last thread to do an eval {}!
57 */
58
59#define JMPENV_BOOTSTRAP \
60 STMT_START { \
61 Zero(&PL_start_env, 1, JMPENV); \
62 PL_start_env.je_ret = -1; \
63 PL_start_env.je_mustcatch = TRUE; \
64 PL_top_env = &PL_start_env; \
65 } STMT_END
66
67/*
68 * PERL_FLEXIBLE_EXCEPTIONS
69 *
70 * All the flexible exceptions code has been removed.
71 * See the following threads for details:
72 *
73 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html
74 *
75 * Joshua's original patches (which weren't applied) and discussion:
76 *
77 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
78 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
79 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
80 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
81 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
82 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
83 *
84 * Chip's reworked patch and discussion:
85 *
86 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
87 *
88 * The flaw in these patches (which went unnoticed at the time) was
89 * that they moved some code that could potentially die() out of the
90 * region protected by the setjmp()s. This caused exceptions within
91 * END blocks and such to not be handled by the correct setjmp().
92 *
93 * The original patches that introduces flexible exceptions were:
94 *
95 * http://public.activestate.com/cgi-bin/perlbrowse?patch=3386
96 * http://public.activestate.com/cgi-bin/perlbrowse?patch=5162
97 */
98
99#define dJMPENV JMPENV cur_env
100
101#define JMPENV_PUSH(v) \
102 STMT_START { \
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103 DEBUG_l({ \
104 int i = 0; JMPENV *p = PL_top_env; \
105 while (p) { i++; p = p->je_prev; } \
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106 Perl_deb(aTHX_ "JUMPENV_PUSH level=%d at %s:%d\n", \
107 i, __FILE__, __LINE__);}) \
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108 cur_env.je_prev = PL_top_env; \
109 OP_REG_TO_MEM; \
110 cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \
111 OP_MEM_TO_REG; \
112 PL_top_env = &cur_env; \
113 cur_env.je_mustcatch = FALSE; \
114 (v) = cur_env.je_ret; \
115 } STMT_END
116
117#define JMPENV_POP \
118 STMT_START { \
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119 DEBUG_l({ \
120 int i = -1; JMPENV *p = PL_top_env; \
121 while (p) { i++; p = p->je_prev; } \
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122 Perl_deb(aTHX_ "JUMPENV_POP level=%d at %s:%d\n", \
123 i, __FILE__, __LINE__);}) \
d3ab86be 124 assert(PL_top_env == &cur_env); \
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125 PL_top_env = cur_env.je_prev; \
126 } STMT_END
127
128#define JMPENV_JUMP(v) \
129 STMT_START { \
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130 DEBUG_l({ \
131 int i = -1; JMPENV *p = PL_top_env; \
132 while (p) { i++; p = p->je_prev; } \
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133 Perl_deb(aTHX_ "JUMPENV_JUMP(%d) level=%d at %s:%d\n", \
134 (int)v, i, __FILE__, __LINE__);}) \
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135 OP_REG_TO_MEM; \
136 if (PL_top_env->je_prev) \
137 PerlProc_longjmp(PL_top_env->je_buf, (v)); \
138 if ((v) == 2) \
37038d91 139 PerlProc_exit(STATUS_EXIT); \
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140 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
141 PerlProc_exit(1); \
142 } STMT_END
143
144#define CATCH_GET (PL_top_env->je_mustcatch)
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145#define CATCH_SET(v) \
146 STMT_START { \
147 DEBUG_l( \
148 Perl_deb(aTHX_ \
149 "JUMPLEVEL set catch %d => %d (for %p) at %s:%d\n", \
150 PL_top_env->je_mustcatch, v, (void*)PL_top_env, \
151 __FILE__, __LINE__);) \
152 PL_top_env->je_mustcatch = (v); \
153 } STMT_END
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154
155
5ac1e9b2 156#include "mydtrace.h"
0d2925a6 157
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158struct cop {
159 BASEOP
d7f23a06
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160 /* On LP64 putting this here takes advantage of the fact that BASEOP isn't
161 an exact multiple of 8 bytes to save structure padding. */
162 line_t cop_line; /* line # of this command */
dca6062a 163 /* label for this construct is now stored in cop_hints_hash */
57843af0 164#ifdef USE_ITHREADS
11faa288 165 char * cop_stashpv; /* package line was compiled in */
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166 char * cop_file; /* file name the following line # is from */
167#else
11faa288 168 HV * cop_stash; /* package line was compiled in */
79072805 169 GV * cop_filegv; /* file the following line # is from */
57843af0 170#endif
d5ec2987 171 U32 cop_hints; /* hints bits from pragmata */
a0d0e21e 172 U32 cop_seq; /* parse sequence number */
72dc9ed5
NC
173 /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */
174 STRLEN * cop_warnings; /* lexical warnings bitmask */
b3ca2e83
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175 /* compile time state of %^H. See the comment in op.c for how this is
176 used to recreate a hash to return from caller. */
c28fe1ec 177 struct refcounted_he * cop_hints_hash;
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178};
179
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180#ifdef USE_ITHREADS
181# define CopFILE(c) ((c)->cop_file)
182# define CopFILEGV(c) (CopFILE(c) \
a0714e2c 183 ? gv_fetchfile(CopFILE(c)) : NULL)
083fcd59 184
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185# ifdef NETWARE
186# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
d9095cec 187# define CopFILE_setn(c,pv,l) ((c)->cop_file = savepv((pv),(l)))
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188# else
189# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
d9095cec 190# define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l)))
7e4e8c89 191# endif
083fcd59 192
57843af0 193# define CopFILESV(c) (CopFILE(c) \
a0714e2c 194 ? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
57843af0 195# define CopFILEAV(c) (CopFILE(c) \
7d49f689 196 ? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
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197# ifdef DEBUGGING
198# define CopFILEAVx(c) (assert(CopFILE(c)), \
36c7798d 199 GvAV(gv_fetchfile(CopFILE(c))))
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200# else
201# define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c))))
202# endif
57843af0 203# define CopSTASHPV(c) ((c)->cop_stashpv)
083fcd59 204
7e4e8c89 205# ifdef NETWARE
bd61b366 206# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL))
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207# else
208# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv))
209# endif
083fcd59 210
11faa288 211# define CopSTASH(c) (CopSTASHPV(c) \
5c284bb0 212 ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL)
bd61b366 213# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL)
ed221c57 214# define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv))
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215# ifdef NETWARE
216# define CopSTASH_free(c) SAVECOPSTASH_FREE(c)
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217# define CopFILE_free(c) SAVECOPFILE_FREE(c)
218# else
ed221c57 219# define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c))
bd61b366 220# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL))
7e4e8c89 221# endif
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222#else
223# define CopFILEGV(c) ((c)->cop_filegv)
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224# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
225# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
d9095cec 226# define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
a0714e2c 227# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
7d49f689 228# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
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229# ifdef DEBUGGING
230# define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
231# else
232# define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
233# endif
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234# define CopFILE(c) (CopFILEGV(c) && GvSV(CopFILEGV(c)) \
235 ? SvPVX(GvSV(CopFILEGV(c))) : NULL)
57843af0 236# define CopSTASH(c) ((c)->cop_stash)
f4dd75d9 237# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
bd61b366 238# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
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239 /* cop_stash is not refcounted */
240# define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
241# define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
05ec9bb3 242# define CopSTASH_free(c)
a0714e2c 243# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
05ec9bb3 244
57843af0 245#endif /* USE_ITHREADS */
dca6062a
NC
246#define CopLABEL(c) Perl_fetch_cop_label(aTHX_ (c)->cop_hints_hash, NULL, NULL)
247#define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
57843af0 248
ed094faf 249#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
cc49e20b 250#define CopLINE(c) ((c)->cop_line)
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251#define CopLINE_inc(c) (++CopLINE(c))
252#define CopLINE_dec(c) (--CopLINE(c))
253#define CopLINE_set(c,l) (CopLINE(c) = (l))
cc49e20b 254
248c2a4d 255/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
e37778c2 256#define OutCopFILE(c) CopFILE(c)
248c2a4d 257
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NC
258/* If $[ is non-zero, it's stored in cop_hints under the key "$[", and
259 HINT_ARYBASE is set to indicate this.
260 Setting it is ineficient due to the need to create 2 mortal SVs, but as
261 using $[ is highly discouraged, no sane Perl code will be using it. */
262#define CopARYBASE_get(c) \
263 ((CopHINTS_get(c) & HINT_ARYBASE) \
c28fe1ec
NC
264 ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \
265 "$[", 2, 0, 0)) \
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266 : 0)
267#define CopARYBASE_set(c, b) STMT_START { \
d5ec2987
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268 if (b || ((c)->cop_hints & HINT_ARYBASE)) { \
269 (c)->cop_hints |= HINT_ARYBASE; \
f747ebd6
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270 if ((c) == &PL_compiling) { \
271 SV *val = newSViv(b); \
272 (void)hv_stores(GvHV(PL_hintgv), "$[", val); \
273 mg_set(val); \
274 PL_hints |= HINT_ARYBASE; \
275 } else { \
276 (c)->cop_hints_hash \
277 = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \
84bafc02 278 newSVpvs_flags("$[", SVs_TEMP), \
7b0bddfa 279 sv_2mortal(newSViv(b))); \
f747ebd6 280 } \
7b0bddfa
NC
281 } \
282 } STMT_END
fc15ae8f 283
623e6609 284/* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */
d5ec2987 285#define CopHINTS_get(c) ((c)->cop_hints + 0)
623e6609 286#define CopHINTS_set(c, h) STMT_START { \
d5ec2987 287 (c)->cop_hints = (h); \
623e6609
NC
288 } STMT_END
289
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290/*
291 * Here we have some enormously heavy (or at least ponderous) wizardry.
292 */
293
294/* subroutine context */
295struct block_sub {
f9c764c5 296 OP * retop; /* op to execute on exit from sub */
8e663997
NC
297 /* Above here is the same for sub, format and eval. */
298 CV * cv;
f9c764c5 299 /* Above here is the same for sub and format. */
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300 AV * savearray;
301 AV * argarray;
bb172083 302 I32 olddepth;
f3548bdc 303 PAD *oldcomppad;
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NC
304};
305
306
307/* format context */
308struct block_format {
f39bc417 309 OP * retop; /* op to execute on exit from sub */
8e663997
NC
310 /* Above here is the same for sub, format and eval. */
311 CV * cv;
f9c764c5
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312 /* Above here is the same for sub and format. */
313 GV * gv;
314 GV * dfoutgv;
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315};
316
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317/* base for the next two macros. Don't use directly.
318 * Note that the refcnt of the cv is incremented twice; The CX one is
319 * decremented by LEAVESUB, the other by LEAVE. */
320
ee98a1d6 321#define PUSHSUB_BASE(cx) \
5ac1e9b2 322 ENTRY_PROBE(GvENAME(CvGV(cv)), \
c6903450
NC
323 CopFILE((const COP *)CvSTART(cv)), \
324 CopLINE((const COP *)CvSTART(cv))); \
5ac1e9b2 325 \
79072805 326 cx->blk_sub.cv = cv; \
b8f55b69 327 cx->blk_sub.olddepth = CvDEPTH(cv); \
ae423868 328 cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \
5f66b61c 329 cx->blk_sub.retop = NULL; \
b36bdeca 330 if (!CvDEPTH(cv)) { \
74c765eb
AL
331 SvREFCNT_inc_simple_void_NN(cv); \
332 SvREFCNT_inc_simple_void_NN(cv); \
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333 SAVEFREESV(cv); \
334 }
335
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DM
336
337#define PUSHSUB(cx) \
338 PUSHSUB_BASE(cx) \
446d0787 339 cx->blk_u16 = PL_op->op_private & \
cc8d50a7 340 (OPpLVAL_INTRO|OPpENTERSUB_INARGS);
79072805 341
ee98a1d6
DM
342/* variant for use by OP_DBSTATE, where op_private holds hint bits */
343#define PUSHSUB_DB(cx) \
344 PUSHSUB_BASE(cx) \
446d0787 345 cx->blk_u16 = 0;
ee98a1d6
DM
346
347
10067d9a 348#define PUSHFORMAT(cx, retop) \
f9c764c5
NC
349 cx->blk_format.cv = cv; \
350 cx->blk_format.gv = gv; \
351 cx->blk_format.retop = (retop); \
f9c764c5
NC
352 cx->blk_format.dfoutgv = PL_defoutgv; \
353 SvREFCNT_inc_void(cx->blk_format.dfoutgv)
79072805 354
3db8f154 355#define POP_SAVEARRAY() \
6d4ff0d2 356 STMT_START { \
3280af22 357 SvREFCNT_dec(GvAV(PL_defgv)); \
a8bba7fa 358 GvAV(PL_defgv) = cx->blk_sub.savearray; \
6d4ff0d2 359 } STMT_END
6d4ff0d2 360
ecf8e9dd 361/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
8e09340b
GS
362 * leave any (a fast av_clear(ary), basically) */
363#define CLEAR_ARGARRAY(ary) \
364 STMT_START { \
365 AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
9c6bc640 366 AvARRAY(ary) = AvALLOC(ary); \
8e09340b
GS
367 AvFILLp(ary) = -1; \
368 } STMT_END
7766f137 369
b0d9ce38
GS
370#define POPSUB(cx,sv) \
371 STMT_START { \
8f629a87
NC
372 RETURN_PROBE(GvENAME(CvGV((const CV*)cx->blk_sub.cv)), \
373 CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
374 CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
5ac1e9b2 375 \
bafb2adc 376 if (CxHASARGS(cx)) { \
7766f137 377 POP_SAVEARRAY(); \
d8b46c1b 378 /* abandon @_ if it got reified */ \
a8bba7fa 379 if (AvREAL(cx->blk_sub.argarray)) { \
e2d306cb 380 const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \
a8bba7fa
GS
381 SvREFCNT_dec(cx->blk_sub.argarray); \
382 cx->blk_sub.argarray = newAV(); \
383 av_extend(cx->blk_sub.argarray, fill); \
11ca45c0 384 AvREIFY_only(cx->blk_sub.argarray); \
b1bc3f34 385 CX_CURPAD_SV(cx->blk_sub, 0) = MUTABLE_SV(cx->blk_sub.argarray); \
d8b46c1b 386 } \
7766f137 387 else { \
8e09340b 388 CLEAR_ARGARRAY(cx->blk_sub.argarray); \
7766f137 389 } \
79072805 390 } \
b1bc3f34 391 sv = MUTABLE_SV(cx->blk_sub.cv); \
8f629a87 392 if (sv && (CvDEPTH((const CV*)sv) = cx->blk_sub.olddepth)) \
a0714e2c 393 sv = NULL; \
b0d9ce38
GS
394 } STMT_END
395
396#define LEAVESUB(sv) \
397 STMT_START { \
398 if (sv) \
399 SvREFCNT_dec(sv); \
400 } STMT_END
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401
402#define POPFORMAT(cx) \
f9c764c5
NC
403 setdefout(cx->blk_format.dfoutgv); \
404 SvREFCNT_dec(cx->blk_format.dfoutgv);
79072805
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405
406/* eval context */
407struct block_eval {
8e663997
NC
408 OP * retop; /* op to execute on exit from eval */
409 /* Above here is the same for sub, format and eval. */
0f79a09d 410 SV * old_namesv;
79072805 411 OP * old_eval_root;
748a9306 412 SV * cur_text;
2090ab20 413 CV * cv;
abd70938 414 JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
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415};
416
17347a51
NC
417/* If we ever need more than 512 op types, change the shift from 7.
418 blku_gimme is actually also only 2 bits, so could be merged with something.
419*/
420
421#define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F)
422#define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7)
85a64632 423
6b75f042 424#define PUSHEVAL(cx,n) \
0f79a09d 425 STMT_START { \
17347a51
NC
426 assert(!(PL_in_eval & ~0x7F)); \
427 assert(!(PL_op->op_type & ~0x1FF)); \
428 cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \
a0714e2c 429 cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
a8bba7fa 430 cx->blk_eval.old_eval_root = PL_eval_root; \
bdc0bf6f 431 cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
601f1833 432 cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
5f66b61c 433 cx->blk_eval.retop = NULL; \
abd70938 434 cx->blk_eval.cur_top_env = PL_top_env; \
0f79a09d 435 } STMT_END
79072805
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436
437#define POPEVAL(cx) \
0f79a09d 438 STMT_START { \
85a64632
NC
439 PL_in_eval = CxOLD_IN_EVAL(cx); \
440 optype = CxOLD_OP_TYPE(cx); \
7766f137 441 PL_eval_root = cx->blk_eval.old_eval_root; \
0f79a09d
GS
442 if (cx->blk_eval.old_namesv) \
443 sv_2mortal(cx->blk_eval.old_namesv); \
444 } STMT_END
79072805
LW
445
446/* loop context */
447struct block_loop {
79072805 448 I32 resetsp;
022eaa24
NC
449 LOOP * my_op; /* My op, that contains redo, next and last ops. */
450 /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence
451 why next_op is conditionally defined below.) */
7766f137 452#ifdef USE_ITHREADS
e846cb92
NC
453 PAD *oldcomppad; /* Also used for the GV, if targoffset is 0 */
454 /* This is also accesible via cx->blk_loop.my_op->op_targ */
455 PADOFFSET targoffset;
7766f137 456#else
022eaa24 457 OP * next_op;
79072805 458 SV ** itervar;
7766f137 459#endif
493b0a3c 460 union {
d01136d6
BS
461 struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/
462 AV * ary; /* use the stack if this is NULL */
463 IV ix;
464 } ary;
465 struct { /* valid if type is LOOP_LAZYIV */
466 IV cur;
467 IV end;
468 } lazyiv;
469 struct { /* valid if type if LOOP_LAZYSV */
470 SV * cur;
471 SV * end; /* maxiumum value (or minimum in reverse) */
472 } lazysv;
473 } state_u;
79072805
LW
474};
475
7766f137
GS
476#ifdef USE_ITHREADS
477# define CxITERVAR(c) \
e846cb92
NC
478 ((c)->blk_loop.oldcomppad \
479 ? (CxPADLOOP(c) \
480 ? &CX_CURPAD_SV( (c)->blk_loop, (c)->blk_loop.targoffset ) \
481 : &GvSV((GV*)(c)->blk_loop.oldcomppad)) \
7766f137 482 : (SV**)NULL)
e846cb92
NC
483# define CX_ITERDATA_SET(cx,idata,o) \
484 if ((cx->blk_loop.targoffset = (o))) \
485 CX_CURPAD_SAVE(cx->blk_loop); \
486 else \
487 cx->blk_loop.oldcomppad = (idata);
7766f137
GS
488#else
489# define CxITERVAR(c) ((c)->blk_loop.itervar)
e846cb92 490# define CX_ITERDATA_SET(cx,ivar,o) \
09edbca0 491 cx->blk_loop.itervar = (SV**)(ivar);
7766f137 492#endif
b1cf8b36 493#define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop))
ae423868 494#define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
446d0787 495#define CxLVAL(c) (0 + (c)->blk_u16)
7766f137 496
022eaa24
NC
497#ifdef USE_ITHREADS
498# define PUSHLOOP_OP_NEXT /* No need to do anything. */
499# define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0)
500#else
501# define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop
502# define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0)
503#endif
504
3b719c58
NC
505#define PUSHLOOP_PLAIN(cx, s) \
506 cx->blk_loop.resetsp = s - PL_stack_base; \
507 cx->blk_loop.my_op = cLOOP; \
508 PUSHLOOP_OP_NEXT; \
d01136d6
BS
509 cx->blk_loop.state_u.ary.ary = NULL; \
510 cx->blk_loop.state_u.ary.ix = 0; \
e846cb92 511 CX_ITERDATA_SET(cx, NULL, 0);
3b719c58 512
e846cb92 513#define PUSHLOOP_FOR(cx, dat, s, offset) \
38a230cb 514 cx->blk_loop.resetsp = s - PL_stack_base; \
022eaa24
NC
515 cx->blk_loop.my_op = cLOOP; \
516 PUSHLOOP_OP_NEXT; \
d01136d6
BS
517 cx->blk_loop.state_u.ary.ary = NULL; \
518 cx->blk_loop.state_u.ary.ix = 0; \
e846cb92 519 CX_ITERDATA_SET(cx, dat, offset);
79072805
LW
520
521#define POPLOOP(cx) \
d01136d6
BS
522 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \
523 SvREFCNT_dec(cx->blk_loop.state_u.lazysv.cur); \
524 SvREFCNT_dec(cx->blk_loop.state_u.lazysv.end); \
525 } \
d01136d6
BS
526 if (CxTYPE(cx) == CXt_LOOP_FOR) \
527 SvREFCNT_dec(cx->blk_loop.state_u.ary.ary);
79072805 528
0d863452
RH
529/* given/when context */
530struct block_givwhen {
531 OP *leave_op;
532};
533
534#define PUSHGIVEN(cx) \
535 cx->blk_givwhen.leave_op = cLOGOP->op_other;
536
537#define PUSHWHEN PUSHGIVEN
538
79072805
LW
539/* context common to subroutines, evals and loops */
540struct block {
446d0787 541 U8 blku_type; /* what kind of context this is */
2e0df0e8 542 U8 blku_gimme; /* is this block running in list context? */
17347a51 543 U16 blku_u16; /* used by block_sub and block_eval (so far) */
79072805
LW
544 I32 blku_oldsp; /* stack pointer to copy stuff down to */
545 COP * blku_oldcop; /* old curcop pointer */
79072805
LW
546 I32 blku_oldmarksp; /* mark stack index */
547 I32 blku_oldscopesp; /* scope stack index */
548 PMOP * blku_oldpm; /* values of pattern match vars */
79072805
LW
549
550 union {
551 struct block_sub blku_sub;
f9c764c5 552 struct block_format blku_format;
79072805
LW
553 struct block_eval blku_eval;
554 struct block_loop blku_loop;
0d863452 555 struct block_givwhen blku_givwhen;
79072805
LW
556 } blk_u;
557};
558#define blk_oldsp cx_u.cx_blk.blku_oldsp
559#define blk_oldcop cx_u.cx_blk.blku_oldcop
79072805
LW
560#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
561#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
562#define blk_oldpm cx_u.cx_blk.blku_oldpm
563#define blk_gimme cx_u.cx_blk.blku_gimme
446d0787 564#define blk_u16 cx_u.cx_blk.blku_u16
79072805 565#define blk_sub cx_u.cx_blk.blk_u.blku_sub
f9c764c5 566#define blk_format cx_u.cx_blk.blk_u.blku_format
79072805
LW
567#define blk_eval cx_u.cx_blk.blk_u.blku_eval
568#define blk_loop cx_u.cx_blk.blk_u.blku_loop
0d863452 569#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
79072805 570
1c98cc53 571#define DEBUG_CX(action) \
d9f81b50 572 DEBUG_l( \
1c98cc53
DM
573 Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) at %s:%d\n", \
574 (long)cxstack_ix, \
575 action, \
576 PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \
577 (long)PL_scopestack_ix, \
578 (long)(cxstack[cxstack_ix].blk_oldscopesp), \
d9f81b50 579 __FILE__, __LINE__));
1c98cc53 580
79072805 581/* Enter a block. */
8990e307 582#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
79072805 583 cx->cx_type = t, \
3280af22
NIS
584 cx->blk_oldsp = sp - PL_stack_base, \
585 cx->blk_oldcop = PL_curcop, \
1aff0e91 586 cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
3280af22 587 cx->blk_oldscopesp = PL_scopestack_ix, \
3280af22 588 cx->blk_oldpm = PL_curpm, \
eb160463 589 cx->blk_gimme = (U8)gimme; \
1c98cc53 590 DEBUG_CX("PUSH");
79072805
LW
591
592/* Exit a block (RETURN and LAST). */
1c98cc53
DM
593#define POPBLOCK(cx,pm) \
594 DEBUG_CX("POP"); \
595 cx = &cxstack[cxstack_ix--], \
1aff0e91 596 newsp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
597 PL_curcop = cx->blk_oldcop, \
598 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
599 PL_scopestack_ix = cx->blk_oldscopesp, \
3280af22 600 pm = cx->blk_oldpm, \
1c98cc53 601 gimme = cx->blk_gimme;
79072805
LW
602
603/* Continue a block elsewhere (NEXT and REDO). */
1c98cc53
DM
604#define TOPBLOCK(cx) \
605 DEBUG_CX("TOP"); \
606 cx = &cxstack[cxstack_ix], \
1aff0e91 607 PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
608 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
609 PL_scopestack_ix = cx->blk_oldscopesp, \
1c98cc53 610 PL_curpm = cx->blk_oldpm;
79072805
LW
611
612/* substitution context */
613struct subst {
446d0787 614 U8 sbu_type; /* what kind of context this is */
1ed74d04 615 U8 sbu_rflags;
446d0787 616 U16 sbu_rxtainted; /* matches struct block */
79072805
LW
617 I32 sbu_iters;
618 I32 sbu_maxiters;
4633a7c4 619 I32 sbu_oldsave;
79072805
LW
620 char * sbu_orig;
621 SV * sbu_dstr;
622 SV * sbu_targ;
623 char * sbu_s;
624 char * sbu_m;
625 char * sbu_strend;
c90c0ff4 626 void * sbu_rxres;
c07a80fd 627 REGEXP * sbu_rx;
79072805
LW
628};
629#define sb_iters cx_u.cx_subst.sbu_iters
630#define sb_maxiters cx_u.cx_subst.sbu_maxiters
22e551b9 631#define sb_rflags cx_u.cx_subst.sbu_rflags
4633a7c4 632#define sb_oldsave cx_u.cx_subst.sbu_oldsave
71be2cbc
PP
633#define sb_once cx_u.cx_subst.sbu_once
634#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
79072805
LW
635#define sb_orig cx_u.cx_subst.sbu_orig
636#define sb_dstr cx_u.cx_subst.sbu_dstr
637#define sb_targ cx_u.cx_subst.sbu_targ
638#define sb_s cx_u.cx_subst.sbu_s
639#define sb_m cx_u.cx_subst.sbu_m
640#define sb_strend cx_u.cx_subst.sbu_strend
c90c0ff4 641#define sb_rxres cx_u.cx_subst.sbu_rxres
c07a80fd 642#define sb_rx cx_u.cx_subst.sbu_rx
79072805 643
9c105995
NC
644#ifdef PERL_CORE
645# define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
79072805
LW
646 cx->sb_iters = iters, \
647 cx->sb_maxiters = maxiters, \
22e551b9 648 cx->sb_rflags = r_flags, \
4633a7c4 649 cx->sb_oldsave = oldsave, \
71be2cbc 650 cx->sb_rxtainted = rxtainted, \
79072805
LW
651 cx->sb_orig = orig, \
652 cx->sb_dstr = dstr, \
653 cx->sb_targ = targ, \
654 cx->sb_s = s, \
655 cx->sb_m = m, \
656 cx->sb_strend = strend, \
4608196e 657 cx->sb_rxres = NULL, \
c07a80fd 658 cx->sb_rx = rx, \
1ed74d04 659 cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \
e22ae1e2 660 rxres_save(&cx->sb_rxres, rx); \
b69b0499 661 (void)ReREFCNT_inc(rx)
79072805 662
9c105995 663# define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
e22ae1e2
DM
664 rxres_free(&cx->sb_rxres); \
665 ReREFCNT_dec(cx->sb_rx)
9c105995
NC
666#endif
667
668#define CxONCE(cx) ((cx)->cx_type & CXp_ONCE)
79072805
LW
669
670struct context {
79072805
LW
671 union {
672 struct block cx_blk;
673 struct subst cx_subst;
674 } cx_u;
675};
2e0df0e8 676#define cx_type cx_u.cx_subst.sbu_type
6b35e009 677
76753e7f
NC
678/* If you re-order these, there is also an array of uppercase names in perl.h
679 and a static array of context names in pp_ctl.c */
3701055e 680#define CXTYPEMASK 0xf
79072805 681#define CXt_NULL 0
76753e7f
NC
682#define CXt_WHEN 1
683#define CXt_BLOCK 2
684/* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a
685 jump table in pp_ctl.c
686 The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c
687*/
688#define CXt_GIVEN 3
c6fdafd0 689/* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */
76753e7f
NC
690#define CXt_LOOP_FOR 4
691#define CXt_LOOP_PLAIN 5
692#define CXt_LOOP_LAZYSV 6
693#define CXt_LOOP_LAZYIV 7
694#define CXt_SUB 8
695#define CXt_FORMAT 9
696#define CXt_EVAL 10
697#define CXt_SUBST 11
698/* SUBST doesn't feature in all switch statements. */
79072805 699
3701055e
NC
700/* private flags for CXt_SUB and CXt_NULL
701 However, this is checked in many places which do not check the type, so
702 this bit needs to be kept clear for most everything else. For reasons I
703 haven't investigated, it can coexist with CXp_FOR_DEF */
1f27d788
NC
704#define CXp_MULTICALL 0x10 /* part of a multicall (so don't
705 tear down context on exit). */
9850bf21 706
ae423868 707/* private flags for CXt_SUB and CXt_FORMAT */
1f27d788 708#define CXp_HASARGS 0x20
ae423868 709
6b35e009 710/* private flags for CXt_EVAL */
1f27d788
NC
711#define CXp_REAL 0x20 /* truly eval'', not a lookalike */
712#define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */
6b35e009 713
7766f137 714/* private flags for CXt_LOOP */
1f27d788 715#define CXp_FOR_DEF 0x10 /* foreach using $_ */
0d863452 716#ifdef USE_ITHREADS
e846cb92 717# define CxPADLOOP(c) ((c)->blk_loop.targoffset)
7766f137 718#endif
e846cb92 719
1ed74d04
NC
720/* private flags for CXt_SUBST */
721#define CXp_ONCE 0x10 /* What was sbu_once in struct subst */
7766f137 722
6b35e009 723#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
76753e7f 724#define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4)
9850bf21
RH
725#define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
726 == CXp_MULTICALL)
0588a150 727#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
7766f137 728 == (CXt_EVAL|CXp_REAL))
0588a150 729#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
1d76a5c3 730 == (CXt_EVAL|CXp_TRYBLOCK))
3b719c58
NC
731#define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN)
732#define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \
733 && ((c)->cx_type & CXp_FOR_DEF))
6b35e009 734
395b8e2d 735#define CXINC ((cxstack_ix + 1) < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
79072805 736
ccfc67b7
JH
737/*
738=head1 "Gimme" Values
739*/
954c1994
GS
740
741/*
742=for apidoc AmU||G_SCALAR
743Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and
744L<perlcall>.
745
746=for apidoc AmU||G_ARRAY
91e74348 747Used to indicate list context. See C<GIMME_V>, C<GIMME> and
954c1994
GS
748L<perlcall>.
749
750=for apidoc AmU||G_VOID
751Used to indicate void context. See C<GIMME_V> and L<perlcall>.
752
753=for apidoc AmU||G_DISCARD
754Indicates that arguments returned from a callback should be discarded. See
755L<perlcall>.
756
757=for apidoc AmU||G_EVAL
758
759Used to force a Perl C<eval> wrapper around a callback. See
760L<perlcall>.
761
762=for apidoc AmU||G_NOARGS
763
764Indicates that no arguments are being sent to a callback. See
765L<perlcall>.
766
767=cut
768*/
769
2f8edad0
NC
770#define G_SCALAR 2
771#define G_ARRAY 3
772#define G_VOID 1
773#define G_WANT 3
79072805 774
864dbfa3 775/* extra flags for Perl_call_* routines */
2f8edad0 776#define G_DISCARD 4 /* Call FREETMPS.
b54b4831
NC
777 Don't change this without consulting the
778 hash actions codes defined in hv.h */
2f8edad0
NC
779#define G_EVAL 8 /* Assume eval {} around subroutine call. */
780#define G_NOARGS 16 /* Don't construct a @_ array. */
7ce09284 781#define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */
2f8edad0
NC
782#define G_NODEBUG 64 /* Disable debugging at toplevel. */
783#define G_METHOD 128 /* Calling method. */
c40f1585 784#define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
edb2152a 785 fold_constants. */
67549bd2
NC
786#define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef
787 A special case for UNSHIFT in
788 Perl_magic_methcall(). */
e336de0d 789
faef0170
HS
790/* flag bits for PL_in_eval */
791#define EVAL_NULL 0 /* not in an eval */
792#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
793#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
864dbfa3 794#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
6dc8a9e4 795#define EVAL_INREQUIRE 8 /* The code is being required. */
faef0170 796
e336de0d
GS
797/* Support for switching (stack and block) contexts.
798 * This ensures magic doesn't invalidate local stack and cx pointers.
799 */
800
e788e7d3
GS
801#define PERLSI_UNKNOWN -1
802#define PERLSI_UNDEF 0
803#define PERLSI_MAIN 1
804#define PERLSI_MAGIC 2
805#define PERLSI_SORT 3
806#define PERLSI_SIGNAL 4
807#define PERLSI_OVERLOAD 5
808#define PERLSI_DESTROY 6
809#define PERLSI_WARNHOOK 7
810#define PERLSI_DIEHOOK 8
811#define PERLSI_REQUIRE 9
e336de0d
GS
812
813struct stackinfo {
814 AV * si_stack; /* stack for current runlevel */
815 PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
9bd87817
NC
816 struct stackinfo * si_prev;
817 struct stackinfo * si_next;
e336de0d
GS
818 I32 si_cxix; /* current context index */
819 I32 si_cxmax; /* maximum allocated index */
820 I32 si_type; /* type of runlevel */
ce2f7c3b 821 I32 si_markoff; /* offset where markstack begins for us.
e336de0d
GS
822 * currently used only with DEBUGGING,
823 * but not #ifdef-ed for bincompat */
824};
825
826typedef struct stackinfo PERL_SI;
827
3280af22
NIS
828#define cxstack (PL_curstackinfo->si_cxstack)
829#define cxstack_ix (PL_curstackinfo->si_cxix)
830#define cxstack_max (PL_curstackinfo->si_cxmax)
e336de0d
GS
831
832#ifdef DEBUGGING
ce2f7c3b
GS
833# define SET_MARK_OFFSET \
834 PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
e336de0d 835#else
ce2f7c3b 836# define SET_MARK_OFFSET NOOP
e336de0d
GS
837#endif
838
d3acc0f7 839#define PUSHSTACKi(type) \
e336de0d 840 STMT_START { \
3280af22 841 PERL_SI *next = PL_curstackinfo->si_next; \
1c98cc53
DM
842 DEBUG_l({ \
843 int i = 0; PERL_SI *p = PL_curstackinfo; \
844 while (p) { i++; p = p->si_prev; } \
845 Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \
846 i, __FILE__, __LINE__);}) \
e336de0d
GS
847 if (!next) { \
848 next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
3280af22
NIS
849 next->si_prev = PL_curstackinfo; \
850 PL_curstackinfo->si_next = next; \
e336de0d
GS
851 } \
852 next->si_type = type; \
853 next->si_cxix = -1; \
854 AvFILLp(next->si_stack) = 0; \
3280af22
NIS
855 SWITCHSTACK(PL_curstack,next->si_stack); \
856 PL_curstackinfo = next; \
ce2f7c3b 857 SET_MARK_OFFSET; \
e336de0d
GS
858 } STMT_END
859
e788e7d3 860#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
d3acc0f7 861
3095d977
GS
862/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
863 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
d3acc0f7 864#define POPSTACK \
e336de0d 865 STMT_START { \
39644a26 866 dSP; \
c4420975 867 PERL_SI * const prev = PL_curstackinfo->si_prev; \
1c98cc53
DM
868 DEBUG_l({ \
869 int i = -1; PERL_SI *p = PL_curstackinfo; \
870 while (p) { i++; p = p->si_prev; } \
871 Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \
872 i, __FILE__, __LINE__);}) \
e336de0d 873 if (!prev) { \
bf49b057 874 PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \
e336de0d
GS
875 my_exit(1); \
876 } \
3280af22 877 SWITCHSTACK(PL_curstack,prev->si_stack); \
e336de0d 878 /* don't free prev here, free them all at the END{} */ \
3280af22 879 PL_curstackinfo = prev; \
e336de0d
GS
880 } STMT_END
881
882#define POPSTACK_TO(s) \
883 STMT_START { \
3280af22 884 while (PL_curstack != s) { \
bac4b2ad 885 dounwind(-1); \
d3acc0f7 886 POPSTACK; \
bac4b2ad 887 } \
e336de0d 888 } STMT_END
923e4eb5
JH
889
890#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
891#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
892
9850bf21
RH
893/*
894=head1 Multicall Functions
895
896=for apidoc Ams||dMULTICALL
897Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>.
898
899=for apidoc Ams||PUSH_MULTICALL
900Opening bracket for a lightweight callback.
901See L<perlcall/Lightweight Callbacks>.
902
903=for apidoc Ams||MULTICALL
904Make a lightweight callback. See L<perlcall/Lightweight Callbacks>.
905
906=for apidoc Ams||POP_MULTICALL
907Closing bracket for a lightweight callback.
908See L<perlcall/Lightweight Callbacks>.
909
910=cut
911*/
912
913#define dMULTICALL \
914 SV **newsp; /* set by POPBLOCK */ \
915 PERL_CONTEXT *cx; \
82f35e8b 916 CV *multicall_cv; \
9850bf21
RH
917 OP *multicall_cop; \
918 bool multicall_oldcatch; \
919 U8 hasargs = 0 /* used by PUSHSUB */
920
82f35e8b 921#define PUSH_MULTICALL(the_cv) \
9850bf21 922 STMT_START { \
0bcc34c2
AL
923 CV * const _nOnclAshIngNamE_ = the_cv; \
924 CV * const cv = _nOnclAshIngNamE_; \
925 AV * const padlist = CvPADLIST(cv); \
9850bf21
RH
926 ENTER; \
927 multicall_oldcatch = CATCH_GET; \
928 SAVETMPS; SAVEVPTR(PL_op); \
929 CATCH_SET(TRUE); \
1bbbfc50 930 PUSHSTACKi(PERLSI_SORT); \
9850bf21
RH
931 PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \
932 PUSHSUB(cx); \
933 if (++CvDEPTH(cv) >= 2) { \
934 PERL_STACK_OVERFLOW_CHECK(); \
935 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
936 } \
937 SAVECOMPPAD(); \
938 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
82f35e8b 939 multicall_cv = cv; \
9850bf21
RH
940 multicall_cop = CvSTART(cv); \
941 } STMT_END
942
943#define MULTICALL \
944 STMT_START { \
945 PL_op = multicall_cop; \
946 CALLRUNOPS(aTHX); \
947 } STMT_END
948
949#define POP_MULTICALL \
950 STMT_START { \
82f35e8b
RH
951 LEAVESUB(multicall_cv); \
952 CvDEPTH(multicall_cv)--; \
9850bf21 953 POPBLOCK(cx,PL_curpm); \
1bbbfc50 954 POPSTACK; \
9850bf21
RH
955 CATCH_SET(multicall_oldcatch); \
956 LEAVE; \
1bbbfc50 957 SPAGAIN; \
9850bf21 958 } STMT_END
b3ca2e83
NC
959
960/*
961 * Local variables:
962 * c-indentation-style: bsd
963 * c-basic-offset: 4
964 * indent-tabs-mode: t
965 * End:
966 *
967 * ex: set ts=8 sts=4 sw=4 noet:
968 */