Commit | Line | Data |
---|---|---|
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 |
79072805 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 | * | |
8622e0e2 RU |
9 | * Control ops (cops) are one of the two ops OP_NEXTSTATE and OP_DBSTATE, |
10 | * that (loosely speaking) are separate statements. | |
3ffa1527 JH |
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. |
79072805 LW |
14 | */ |
15 | ||
0d2925a6 | 16 | /* A jmpenv packages the state required to perform a proper non-local jump. |
1c98cc53 DM |
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 | * |
1c98cc53 DM |
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 | |
0d2925a6 DM |
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 | ||
32 | struct 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 | ||
39 | typedef 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 { \ | |
1c98cc53 DM |
103 | DEBUG_l({ \ |
104 | int i = 0; JMPENV *p = PL_top_env; \ | |
105 | while (p) { i++; p = p->je_prev; } \ | |
91e35ba1 DM |
106 | Perl_deb(aTHX_ "JUMPENV_PUSH level=%d at %s:%d\n", \ |
107 | i, __FILE__, __LINE__);}) \ | |
0d2925a6 DM |
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 { \ | |
1c98cc53 DM |
119 | DEBUG_l({ \ |
120 | int i = -1; JMPENV *p = PL_top_env; \ | |
121 | while (p) { i++; p = p->je_prev; } \ | |
91e35ba1 DM |
122 | Perl_deb(aTHX_ "JUMPENV_POP level=%d at %s:%d\n", \ |
123 | i, __FILE__, __LINE__);}) \ | |
d3ab86be | 124 | assert(PL_top_env == &cur_env); \ |
0d2925a6 DM |
125 | PL_top_env = cur_env.je_prev; \ |
126 | } STMT_END | |
127 | ||
128 | #define JMPENV_JUMP(v) \ | |
129 | STMT_START { \ | |
1c98cc53 DM |
130 | DEBUG_l({ \ |
131 | int i = -1; JMPENV *p = PL_top_env; \ | |
132 | while (p) { i++; p = p->je_prev; } \ | |
91e35ba1 DM |
133 | Perl_deb(aTHX_ "JUMPENV_JUMP(%d) level=%d at %s:%d\n", \ |
134 | (int)v, i, __FILE__, __LINE__);}) \ | |
0d2925a6 DM |
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); \ |
0d2925a6 DM |
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) | |
1c98cc53 DM |
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 | |
0d2925a6 DM |
154 | |
155 | ||
5ac1e9b2 | 156 | #include "mydtrace.h" |
0d2925a6 | 157 | |
79072805 LW |
158 | struct cop { |
159 | BASEOP | |
d7f23a06 NC |
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 */ |
57843af0 GS |
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 NC |
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; |
79072805 LW |
178 | }; |
179 | ||
57843af0 GS |
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 | |
7e4e8c89 NC |
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))) |
7e4e8c89 NC |
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) |
8688788e SH |
197 | # ifdef DEBUGGING |
198 | # define CopFILEAVx(c) (assert(CopFILE(c)), \ | |
36c7798d | 199 | GvAV(gv_fetchfile(CopFILE(c)))) |
8688788e SH |
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)) |
7e4e8c89 NC |
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)) |
7e4e8c89 NC |
215 | # ifdef NETWARE |
216 | # define CopSTASH_free(c) SAVECOPSTASH_FREE(c) | |
7e4e8c89 NC |
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 |
57843af0 GS |
222 | #else |
223 | # define CopFILEGV(c) ((c)->cop_filegv) | |
f4dd75d9 GS |
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) |
8688788e SH |
229 | # ifdef DEBUGGING |
230 | # define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c))) | |
231 | # else | |
232 | # define CopFILEAVx(c) (GvAV(CopFILEGV(c))) | |
233 | # endif | |
be46dfad RGS |
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) |
f4dd75d9 GS |
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 */ |
d6747b7a | 246 | #define CopLABEL(c) Perl_fetch_cop_label(aTHX_ (c), NULL, NULL) |
dca6062a | 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) |
57843af0 GS |
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 | |
7b0bddfa 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)) \ | |
7b0bddfa NC |
266 | : 0) |
267 | #define CopARYBASE_set(c, b) STMT_START { \ | |
d5ec2987 NC |
268 | if (b || ((c)->cop_hints & HINT_ARYBASE)) { \ |
269 | (c)->cop_hints |= HINT_ARYBASE; \ | |
f747ebd6 Z |
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 | ||
79072805 LW |
290 | /* |
291 | * Here we have some enormously heavy (or at least ponderous) wizardry. | |
292 | */ | |
293 | ||
294 | /* subroutine context */ | |
295 | struct 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. */ |
79072805 LW |
300 | AV * savearray; |
301 | AV * argarray; | |
bb172083 | 302 | I32 olddepth; |
f3548bdc | 303 | PAD *oldcomppad; |
f9c764c5 NC |
304 | }; |
305 | ||
306 | ||
307 | /* format context */ | |
308 | struct 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 NC |
312 | /* Above here is the same for sub and format. */ |
313 | GV * gv; | |
314 | GV * dfoutgv; | |
79072805 LW |
315 | }; |
316 | ||
b36bdeca DM |
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); \ | |
b36bdeca DM |
333 | SAVEFREESV(cv); \ |
334 | } | |
335 | ||
ee98a1d6 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 | |
79072805 LW |
401 | |
402 | #define POPFORMAT(cx) \ | |
f9c764c5 NC |
403 | setdefout(cx->blk_format.dfoutgv); \ |
404 | SvREFCNT_dec(cx->blk_format.dfoutgv); | |
79072805 LW |
405 | |
406 | /* eval context */ | |
407 | struct 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 */ |
79072805 LW |
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 LW |
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 */ | |
447 | struct block_loop { | |
79072805 | 448 | I32 resetsp; |
022eaa24 | 449 | LOOP * my_op; /* My op, that contains redo, next and last ops. */ |
df530c37 DM |
450 | union { /* different ways of locating the iteration variable */ |
451 | SV **svp; | |
452 | GV *gv; | |
453 | PAD *oldcomppad; /* only used in ITHREADS */ | |
454 | } itervar_u; | |
493b0a3c | 455 | union { |
d01136d6 BS |
456 | struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/ |
457 | AV * ary; /* use the stack if this is NULL */ | |
458 | IV ix; | |
459 | } ary; | |
460 | struct { /* valid if type is LOOP_LAZYIV */ | |
461 | IV cur; | |
462 | IV end; | |
463 | } lazyiv; | |
464 | struct { /* valid if type if LOOP_LAZYSV */ | |
465 | SV * cur; | |
466 | SV * end; /* maxiumum value (or minimum in reverse) */ | |
467 | } lazysv; | |
468 | } state_u; | |
79072805 LW |
469 | }; |
470 | ||
7766f137 | 471 | #ifdef USE_ITHREADS |
f83b46a0 DM |
472 | # define CxITERVAR_PADSV(c) \ |
473 | &CX_CURPAD_SV( (c)->blk_loop.itervar_u, (c)->blk_loop.my_op->op_targ) | |
474 | #else | |
475 | # define CxITERVAR_PADSV(c) ((c)->blk_loop.itervar_u.svp) | |
476 | #endif | |
477 | ||
478 | #define CxITERVAR(c) \ | |
df530c37 | 479 | ((c)->blk_loop.itervar_u.oldcomppad \ |
e846cb92 | 480 | ? (CxPADLOOP(c) \ |
f83b46a0 | 481 | ? CxITERVAR_PADSV(c) \ |
df530c37 | 482 | : &GvSV((c)->blk_loop.itervar_u.gv)) \ |
7766f137 | 483 | : (SV**)NULL) |
f83b46a0 | 484 | |
b1cf8b36 | 485 | #define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop)) |
ae423868 | 486 | #define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS) |
446d0787 | 487 | #define CxLVAL(c) (0 + (c)->blk_u16) |
7766f137 | 488 | |
3b719c58 NC |
489 | #define PUSHLOOP_PLAIN(cx, s) \ |
490 | cx->blk_loop.resetsp = s - PL_stack_base; \ | |
491 | cx->blk_loop.my_op = cLOOP; \ | |
d01136d6 BS |
492 | cx->blk_loop.state_u.ary.ary = NULL; \ |
493 | cx->blk_loop.state_u.ary.ix = 0; \ | |
df530c37 | 494 | cx->blk_loop.itervar_u.svp = NULL; |
3b719c58 | 495 | |
df530c37 | 496 | #define PUSHLOOP_FOR(cx, ivar, s) \ |
38a230cb | 497 | cx->blk_loop.resetsp = s - PL_stack_base; \ |
022eaa24 | 498 | cx->blk_loop.my_op = cLOOP; \ |
d01136d6 BS |
499 | cx->blk_loop.state_u.ary.ary = NULL; \ |
500 | cx->blk_loop.state_u.ary.ix = 0; \ | |
df530c37 | 501 | cx->blk_loop.itervar_u.svp = (SV**)(ivar); |
79072805 LW |
502 | |
503 | #define POPLOOP(cx) \ | |
d01136d6 BS |
504 | if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \ |
505 | SvREFCNT_dec(cx->blk_loop.state_u.lazysv.cur); \ | |
506 | SvREFCNT_dec(cx->blk_loop.state_u.lazysv.end); \ | |
507 | } \ | |
d01136d6 BS |
508 | if (CxTYPE(cx) == CXt_LOOP_FOR) \ |
509 | SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); | |
79072805 | 510 | |
0d863452 RH |
511 | /* given/when context */ |
512 | struct block_givwhen { | |
513 | OP *leave_op; | |
514 | }; | |
515 | ||
516 | #define PUSHGIVEN(cx) \ | |
517 | cx->blk_givwhen.leave_op = cLOGOP->op_other; | |
518 | ||
519 | #define PUSHWHEN PUSHGIVEN | |
520 | ||
79072805 LW |
521 | /* context common to subroutines, evals and loops */ |
522 | struct block { | |
446d0787 | 523 | U8 blku_type; /* what kind of context this is */ |
2e0df0e8 | 524 | U8 blku_gimme; /* is this block running in list context? */ |
17347a51 | 525 | U16 blku_u16; /* used by block_sub and block_eval (so far) */ |
79072805 LW |
526 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
527 | COP * blku_oldcop; /* old curcop pointer */ | |
79072805 LW |
528 | I32 blku_oldmarksp; /* mark stack index */ |
529 | I32 blku_oldscopesp; /* scope stack index */ | |
530 | PMOP * blku_oldpm; /* values of pattern match vars */ | |
79072805 LW |
531 | |
532 | union { | |
533 | struct block_sub blku_sub; | |
f9c764c5 | 534 | struct block_format blku_format; |
79072805 LW |
535 | struct block_eval blku_eval; |
536 | struct block_loop blku_loop; | |
0d863452 | 537 | struct block_givwhen blku_givwhen; |
79072805 LW |
538 | } blk_u; |
539 | }; | |
540 | #define blk_oldsp cx_u.cx_blk.blku_oldsp | |
541 | #define blk_oldcop cx_u.cx_blk.blku_oldcop | |
79072805 LW |
542 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
543 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp | |
544 | #define blk_oldpm cx_u.cx_blk.blku_oldpm | |
545 | #define blk_gimme cx_u.cx_blk.blku_gimme | |
446d0787 | 546 | #define blk_u16 cx_u.cx_blk.blku_u16 |
79072805 | 547 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub |
f9c764c5 | 548 | #define blk_format cx_u.cx_blk.blk_u.blku_format |
79072805 LW |
549 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval |
550 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop | |
0d863452 | 551 | #define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen |
79072805 | 552 | |
1c98cc53 | 553 | #define DEBUG_CX(action) \ |
d9f81b50 | 554 | DEBUG_l( \ |
1c98cc53 DM |
555 | Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) at %s:%d\n", \ |
556 | (long)cxstack_ix, \ | |
557 | action, \ | |
558 | PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \ | |
559 | (long)PL_scopestack_ix, \ | |
560 | (long)(cxstack[cxstack_ix].blk_oldscopesp), \ | |
d9f81b50 | 561 | __FILE__, __LINE__)); |
1c98cc53 | 562 | |
79072805 | 563 | /* Enter a block. */ |
8990e307 | 564 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 | 565 | cx->cx_type = t, \ |
3280af22 NIS |
566 | cx->blk_oldsp = sp - PL_stack_base, \ |
567 | cx->blk_oldcop = PL_curcop, \ | |
1aff0e91 | 568 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 | 569 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
3280af22 | 570 | cx->blk_oldpm = PL_curpm, \ |
eb160463 | 571 | cx->blk_gimme = (U8)gimme; \ |
1c98cc53 | 572 | DEBUG_CX("PUSH"); |
79072805 LW |
573 | |
574 | /* Exit a block (RETURN and LAST). */ | |
1c98cc53 DM |
575 | #define POPBLOCK(cx,pm) \ |
576 | DEBUG_CX("POP"); \ | |
577 | cx = &cxstack[cxstack_ix--], \ | |
1aff0e91 | 578 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
579 | PL_curcop = cx->blk_oldcop, \ |
580 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ | |
581 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
3280af22 | 582 | pm = cx->blk_oldpm, \ |
1c98cc53 | 583 | gimme = cx->blk_gimme; |
79072805 LW |
584 | |
585 | /* Continue a block elsewhere (NEXT and REDO). */ | |
1c98cc53 DM |
586 | #define TOPBLOCK(cx) \ |
587 | DEBUG_CX("TOP"); \ | |
588 | cx = &cxstack[cxstack_ix], \ | |
1aff0e91 | 589 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
590 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
591 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
1c98cc53 | 592 | PL_curpm = cx->blk_oldpm; |
79072805 LW |
593 | |
594 | /* substitution context */ | |
595 | struct subst { | |
446d0787 | 596 | U8 sbu_type; /* what kind of context this is */ |
1ed74d04 | 597 | U8 sbu_rflags; |
446d0787 | 598 | U16 sbu_rxtainted; /* matches struct block */ |
79072805 LW |
599 | I32 sbu_iters; |
600 | I32 sbu_maxiters; | |
4633a7c4 | 601 | I32 sbu_oldsave; |
79072805 LW |
602 | char * sbu_orig; |
603 | SV * sbu_dstr; | |
604 | SV * sbu_targ; | |
605 | char * sbu_s; | |
606 | char * sbu_m; | |
607 | char * sbu_strend; | |
c90c0ff4 | 608 | void * sbu_rxres; |
c07a80fd | 609 | REGEXP * sbu_rx; |
79072805 LW |
610 | }; |
611 | #define sb_iters cx_u.cx_subst.sbu_iters | |
612 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters | |
22e551b9 | 613 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 | 614 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc | 615 | #define sb_once cx_u.cx_subst.sbu_once |
616 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted | |
79072805 LW |
617 | #define sb_orig cx_u.cx_subst.sbu_orig |
618 | #define sb_dstr cx_u.cx_subst.sbu_dstr | |
619 | #define sb_targ cx_u.cx_subst.sbu_targ | |
620 | #define sb_s cx_u.cx_subst.sbu_s | |
621 | #define sb_m cx_u.cx_subst.sbu_m | |
622 | #define sb_strend cx_u.cx_subst.sbu_strend | |
c90c0ff4 | 623 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd | 624 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 | 625 | |
9c105995 NC |
626 | #ifdef PERL_CORE |
627 | # define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ | |
79072805 LW |
628 | cx->sb_iters = iters, \ |
629 | cx->sb_maxiters = maxiters, \ | |
22e551b9 | 630 | cx->sb_rflags = r_flags, \ |
4633a7c4 | 631 | cx->sb_oldsave = oldsave, \ |
71be2cbc | 632 | cx->sb_rxtainted = rxtainted, \ |
79072805 LW |
633 | cx->sb_orig = orig, \ |
634 | cx->sb_dstr = dstr, \ | |
635 | cx->sb_targ = targ, \ | |
636 | cx->sb_s = s, \ | |
637 | cx->sb_m = m, \ | |
638 | cx->sb_strend = strend, \ | |
4608196e | 639 | cx->sb_rxres = NULL, \ |
c07a80fd | 640 | cx->sb_rx = rx, \ |
1ed74d04 | 641 | cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \ |
e22ae1e2 | 642 | rxres_save(&cx->sb_rxres, rx); \ |
b69b0499 | 643 | (void)ReREFCNT_inc(rx) |
79072805 | 644 | |
9c105995 | 645 | # define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
e22ae1e2 DM |
646 | rxres_free(&cx->sb_rxres); \ |
647 | ReREFCNT_dec(cx->sb_rx) | |
9c105995 NC |
648 | #endif |
649 | ||
650 | #define CxONCE(cx) ((cx)->cx_type & CXp_ONCE) | |
79072805 LW |
651 | |
652 | struct context { | |
79072805 LW |
653 | union { |
654 | struct block cx_blk; | |
655 | struct subst cx_subst; | |
656 | } cx_u; | |
657 | }; | |
2e0df0e8 | 658 | #define cx_type cx_u.cx_subst.sbu_type |
6b35e009 | 659 | |
76753e7f NC |
660 | /* If you re-order these, there is also an array of uppercase names in perl.h |
661 | and a static array of context names in pp_ctl.c */ | |
3701055e | 662 | #define CXTYPEMASK 0xf |
79072805 | 663 | #define CXt_NULL 0 |
76753e7f NC |
664 | #define CXt_WHEN 1 |
665 | #define CXt_BLOCK 2 | |
666 | /* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a | |
667 | jump table in pp_ctl.c | |
668 | The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c | |
669 | */ | |
670 | #define CXt_GIVEN 3 | |
c6fdafd0 | 671 | /* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */ |
76753e7f NC |
672 | #define CXt_LOOP_FOR 4 |
673 | #define CXt_LOOP_PLAIN 5 | |
674 | #define CXt_LOOP_LAZYSV 6 | |
675 | #define CXt_LOOP_LAZYIV 7 | |
676 | #define CXt_SUB 8 | |
677 | #define CXt_FORMAT 9 | |
678 | #define CXt_EVAL 10 | |
679 | #define CXt_SUBST 11 | |
680 | /* SUBST doesn't feature in all switch statements. */ | |
79072805 | 681 | |
3701055e NC |
682 | /* private flags for CXt_SUB and CXt_NULL |
683 | However, this is checked in many places which do not check the type, so | |
684 | this bit needs to be kept clear for most everything else. For reasons I | |
685 | haven't investigated, it can coexist with CXp_FOR_DEF */ | |
1f27d788 NC |
686 | #define CXp_MULTICALL 0x10 /* part of a multicall (so don't |
687 | tear down context on exit). */ | |
9850bf21 | 688 | |
ae423868 | 689 | /* private flags for CXt_SUB and CXt_FORMAT */ |
1f27d788 | 690 | #define CXp_HASARGS 0x20 |
ae423868 | 691 | |
6b35e009 | 692 | /* private flags for CXt_EVAL */ |
1f27d788 NC |
693 | #define CXp_REAL 0x20 /* truly eval'', not a lookalike */ |
694 | #define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */ | |
6b35e009 | 695 | |
7766f137 | 696 | /* private flags for CXt_LOOP */ |
1f27d788 | 697 | #define CXp_FOR_DEF 0x10 /* foreach using $_ */ |
56b98d0f | 698 | #define CxPADLOOP(c) ((c)->blk_loop.my_op->op_targ) |
e846cb92 | 699 | |
1ed74d04 NC |
700 | /* private flags for CXt_SUBST */ |
701 | #define CXp_ONCE 0x10 /* What was sbu_once in struct subst */ | |
7766f137 | 702 | |
6b35e009 | 703 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
76753e7f | 704 | #define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4) |
9850bf21 RH |
705 | #define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \ |
706 | == CXp_MULTICALL) | |
0588a150 | 707 | #define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \ |
7766f137 | 708 | == (CXt_EVAL|CXp_REAL)) |
0588a150 | 709 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \ |
1d76a5c3 | 710 | == (CXt_EVAL|CXp_TRYBLOCK)) |
3b719c58 NC |
711 | #define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) |
712 | #define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \ | |
713 | && ((c)->cx_type & CXp_FOR_DEF)) | |
6b35e009 | 714 | |
109bf713 | 715 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
79072805 | 716 | |
ccfc67b7 JH |
717 | /* |
718 | =head1 "Gimme" Values | |
719 | */ | |
954c1994 GS |
720 | |
721 | /* | |
722 | =for apidoc AmU||G_SCALAR | |
723 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and | |
724 | L<perlcall>. | |
725 | ||
726 | =for apidoc AmU||G_ARRAY | |
91e74348 | 727 | Used to indicate list context. See C<GIMME_V>, C<GIMME> and |
954c1994 GS |
728 | L<perlcall>. |
729 | ||
730 | =for apidoc AmU||G_VOID | |
731 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. | |
732 | ||
733 | =for apidoc AmU||G_DISCARD | |
734 | Indicates that arguments returned from a callback should be discarded. See | |
735 | L<perlcall>. | |
736 | ||
737 | =for apidoc AmU||G_EVAL | |
738 | ||
739 | Used to force a Perl C<eval> wrapper around a callback. See | |
740 | L<perlcall>. | |
741 | ||
742 | =for apidoc AmU||G_NOARGS | |
743 | ||
744 | Indicates that no arguments are being sent to a callback. See | |
745 | L<perlcall>. | |
746 | ||
747 | =cut | |
748 | */ | |
749 | ||
2f8edad0 NC |
750 | #define G_SCALAR 2 |
751 | #define G_ARRAY 3 | |
752 | #define G_VOID 1 | |
753 | #define G_WANT 3 | |
79072805 | 754 | |
864dbfa3 | 755 | /* extra flags for Perl_call_* routines */ |
2f8edad0 | 756 | #define G_DISCARD 4 /* Call FREETMPS. |
b54b4831 NC |
757 | Don't change this without consulting the |
758 | hash actions codes defined in hv.h */ | |
2f8edad0 NC |
759 | #define G_EVAL 8 /* Assume eval {} around subroutine call. */ |
760 | #define G_NOARGS 16 /* Don't construct a @_ array. */ | |
7ce09284 | 761 | #define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */ |
2f8edad0 NC |
762 | #define G_NODEBUG 64 /* Disable debugging at toplevel. */ |
763 | #define G_METHOD 128 /* Calling method. */ | |
c40f1585 | 764 | #define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or |
edb2152a | 765 | fold_constants. */ |
67549bd2 NC |
766 | #define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef |
767 | A special case for UNSHIFT in | |
768 | Perl_magic_methcall(). */ | |
e336de0d | 769 | |
faef0170 HS |
770 | /* flag bits for PL_in_eval */ |
771 | #define EVAL_NULL 0 /* not in an eval */ | |
772 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ | |
773 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ | |
864dbfa3 | 774 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
6dc8a9e4 | 775 | #define EVAL_INREQUIRE 8 /* The code is being required. */ |
faef0170 | 776 | |
e336de0d GS |
777 | /* Support for switching (stack and block) contexts. |
778 | * This ensures magic doesn't invalidate local stack and cx pointers. | |
779 | */ | |
780 | ||
e788e7d3 GS |
781 | #define PERLSI_UNKNOWN -1 |
782 | #define PERLSI_UNDEF 0 | |
783 | #define PERLSI_MAIN 1 | |
784 | #define PERLSI_MAGIC 2 | |
785 | #define PERLSI_SORT 3 | |
786 | #define PERLSI_SIGNAL 4 | |
787 | #define PERLSI_OVERLOAD 5 | |
788 | #define PERLSI_DESTROY 6 | |
789 | #define PERLSI_WARNHOOK 7 | |
790 | #define PERLSI_DIEHOOK 8 | |
791 | #define PERLSI_REQUIRE 9 | |
e336de0d GS |
792 | |
793 | struct stackinfo { | |
794 | AV * si_stack; /* stack for current runlevel */ | |
795 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ | |
9bd87817 NC |
796 | struct stackinfo * si_prev; |
797 | struct stackinfo * si_next; | |
e336de0d GS |
798 | I32 si_cxix; /* current context index */ |
799 | I32 si_cxmax; /* maximum allocated index */ | |
800 | I32 si_type; /* type of runlevel */ | |
ce2f7c3b | 801 | I32 si_markoff; /* offset where markstack begins for us. |
e336de0d GS |
802 | * currently used only with DEBUGGING, |
803 | * but not #ifdef-ed for bincompat */ | |
804 | }; | |
805 | ||
806 | typedef struct stackinfo PERL_SI; | |
807 | ||
3280af22 NIS |
808 | #define cxstack (PL_curstackinfo->si_cxstack) |
809 | #define cxstack_ix (PL_curstackinfo->si_cxix) | |
810 | #define cxstack_max (PL_curstackinfo->si_cxmax) | |
e336de0d GS |
811 | |
812 | #ifdef DEBUGGING | |
ce2f7c3b GS |
813 | # define SET_MARK_OFFSET \ |
814 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack | |
e336de0d | 815 | #else |
ce2f7c3b | 816 | # define SET_MARK_OFFSET NOOP |
e336de0d GS |
817 | #endif |
818 | ||
d3acc0f7 | 819 | #define PUSHSTACKi(type) \ |
e336de0d | 820 | STMT_START { \ |
3280af22 | 821 | PERL_SI *next = PL_curstackinfo->si_next; \ |
1c98cc53 DM |
822 | DEBUG_l({ \ |
823 | int i = 0; PERL_SI *p = PL_curstackinfo; \ | |
824 | while (p) { i++; p = p->si_prev; } \ | |
825 | Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \ | |
826 | i, __FILE__, __LINE__);}) \ | |
e336de0d GS |
827 | if (!next) { \ |
828 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ | |
3280af22 NIS |
829 | next->si_prev = PL_curstackinfo; \ |
830 | PL_curstackinfo->si_next = next; \ | |
e336de0d GS |
831 | } \ |
832 | next->si_type = type; \ | |
833 | next->si_cxix = -1; \ | |
834 | AvFILLp(next->si_stack) = 0; \ | |
3280af22 NIS |
835 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
836 | PL_curstackinfo = next; \ | |
ce2f7c3b | 837 | SET_MARK_OFFSET; \ |
e336de0d GS |
838 | } STMT_END |
839 | ||
e788e7d3 | 840 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 | 841 | |
3095d977 GS |
842 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
843 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ | |
d3acc0f7 | 844 | #define POPSTACK \ |
e336de0d | 845 | STMT_START { \ |
39644a26 | 846 | dSP; \ |
c4420975 | 847 | PERL_SI * const prev = PL_curstackinfo->si_prev; \ |
1c98cc53 DM |
848 | DEBUG_l({ \ |
849 | int i = -1; PERL_SI *p = PL_curstackinfo; \ | |
850 | while (p) { i++; p = p->si_prev; } \ | |
851 | Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \ | |
852 | i, __FILE__, __LINE__);}) \ | |
e336de0d | 853 | if (!prev) { \ |
bf49b057 | 854 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d GS |
855 | my_exit(1); \ |
856 | } \ | |
3280af22 | 857 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d | 858 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 | 859 | PL_curstackinfo = prev; \ |
e336de0d GS |
860 | } STMT_END |
861 | ||
862 | #define POPSTACK_TO(s) \ | |
863 | STMT_START { \ | |
3280af22 | 864 | while (PL_curstack != s) { \ |
bac4b2ad | 865 | dounwind(-1); \ |
d3acc0f7 | 866 | POPSTACK; \ |
bac4b2ad | 867 | } \ |
e336de0d | 868 | } STMT_END |
923e4eb5 JH |
869 | |
870 | #define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling) | |
871 | #define IN_PERL_RUNTIME (PL_curcop != &PL_compiling) | |
872 | ||
9850bf21 RH |
873 | /* |
874 | =head1 Multicall Functions | |
875 | ||
876 | =for apidoc Ams||dMULTICALL | |
877 | Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>. | |
878 | ||
879 | =for apidoc Ams||PUSH_MULTICALL | |
880 | Opening bracket for a lightweight callback. | |
881 | See L<perlcall/Lightweight Callbacks>. | |
882 | ||
883 | =for apidoc Ams||MULTICALL | |
884 | Make a lightweight callback. See L<perlcall/Lightweight Callbacks>. | |
885 | ||
886 | =for apidoc Ams||POP_MULTICALL | |
887 | Closing bracket for a lightweight callback. | |
888 | See L<perlcall/Lightweight Callbacks>. | |
889 | ||
890 | =cut | |
891 | */ | |
892 | ||
893 | #define dMULTICALL \ | |
894 | SV **newsp; /* set by POPBLOCK */ \ | |
895 | PERL_CONTEXT *cx; \ | |
82f35e8b | 896 | CV *multicall_cv; \ |
9850bf21 RH |
897 | OP *multicall_cop; \ |
898 | bool multicall_oldcatch; \ | |
899 | U8 hasargs = 0 /* used by PUSHSUB */ | |
900 | ||
82f35e8b | 901 | #define PUSH_MULTICALL(the_cv) \ |
9850bf21 | 902 | STMT_START { \ |
0bcc34c2 AL |
903 | CV * const _nOnclAshIngNamE_ = the_cv; \ |
904 | CV * const cv = _nOnclAshIngNamE_; \ | |
905 | AV * const padlist = CvPADLIST(cv); \ | |
9850bf21 RH |
906 | ENTER; \ |
907 | multicall_oldcatch = CATCH_GET; \ | |
908 | SAVETMPS; SAVEVPTR(PL_op); \ | |
909 | CATCH_SET(TRUE); \ | |
1bbbfc50 | 910 | PUSHSTACKi(PERLSI_SORT); \ |
9850bf21 RH |
911 | PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \ |
912 | PUSHSUB(cx); \ | |
913 | if (++CvDEPTH(cv) >= 2) { \ | |
914 | PERL_STACK_OVERFLOW_CHECK(); \ | |
915 | Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \ | |
916 | } \ | |
917 | SAVECOMPPAD(); \ | |
918 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \ | |
82f35e8b | 919 | multicall_cv = cv; \ |
9850bf21 RH |
920 | multicall_cop = CvSTART(cv); \ |
921 | } STMT_END | |
922 | ||
923 | #define MULTICALL \ | |
924 | STMT_START { \ | |
925 | PL_op = multicall_cop; \ | |
926 | CALLRUNOPS(aTHX); \ | |
927 | } STMT_END | |
928 | ||
929 | #define POP_MULTICALL \ | |
930 | STMT_START { \ | |
82f35e8b RH |
931 | LEAVESUB(multicall_cv); \ |
932 | CvDEPTH(multicall_cv)--; \ | |
9850bf21 | 933 | POPBLOCK(cx,PL_curpm); \ |
1bbbfc50 | 934 | POPSTACK; \ |
9850bf21 RH |
935 | CATCH_SET(multicall_oldcatch); \ |
936 | LEAVE; \ | |
1bbbfc50 | 937 | SPAGAIN; \ |
9850bf21 | 938 | } STMT_END |
b3ca2e83 NC |
939 | |
940 | /* | |
941 | * Local variables: | |
942 | * c-indentation-style: bsd | |
943 | * c-basic-offset: 4 | |
944 | * indent-tabs-mode: t | |
945 | * End: | |
946 | * | |
947 | * ex: set ts=8 sts=4 sw=4 noet: | |
948 | */ |