Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* cop.h |
79072805 | 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 | |
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 | * | |
a3985cdc | 9 | * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE, |
3ffa1527 JH |
10 | * and OP_SETSTATE that (loosely speaking) are separate statements. |
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 DM |
16 | /* A jmpenv packages the state required to perform a proper non-local jump. |
17 | * Note that there is a start_env initialized when perl starts, and top_env | |
18 | * points to this initially, so top_env should always be non-null. | |
19 | * | |
20 | * Existence of a non-null top_env->je_prev implies it is valid to call | |
21 | * longjmp() at that runlevel (we make sure start_env.je_prev is always | |
22 | * null to ensure this). | |
23 | * | |
24 | * je_mustcatch, when set at any runlevel to TRUE, means eval ops must | |
25 | * establish a local jmpenv to handle exception traps. Care must be taken | |
26 | * to restore the previous value of je_mustcatch before exiting the | |
27 | * stack frame iff JMPENV_PUSH was not called in that stack frame. | |
28 | * GSAR 97-03-27 | |
29 | */ | |
30 | ||
31 | struct jmpenv { | |
32 | struct jmpenv * je_prev; | |
33 | Sigjmp_buf je_buf; /* only for use if !je_throw */ | |
34 | int je_ret; /* last exception thrown */ | |
35 | bool je_mustcatch; /* need to call longjmp()? */ | |
36 | }; | |
37 | ||
38 | typedef struct jmpenv JMPENV; | |
39 | ||
40 | #ifdef OP_IN_REGISTER | |
41 | #define OP_REG_TO_MEM PL_opsave = op | |
42 | #define OP_MEM_TO_REG op = PL_opsave | |
43 | #else | |
44 | #define OP_REG_TO_MEM NOOP | |
45 | #define OP_MEM_TO_REG NOOP | |
46 | #endif | |
47 | ||
48 | /* | |
49 | * How to build the first jmpenv. | |
50 | * | |
51 | * top_env needs to be non-zero. It points to an area | |
52 | * in which longjmp() stuff is stored, as C callstack | |
53 | * info there at least is thread specific this has to | |
54 | * be per-thread. Otherwise a 'die' in a thread gives | |
55 | * that thread the C stack of last thread to do an eval {}! | |
56 | */ | |
57 | ||
58 | #define JMPENV_BOOTSTRAP \ | |
59 | STMT_START { \ | |
60 | Zero(&PL_start_env, 1, JMPENV); \ | |
61 | PL_start_env.je_ret = -1; \ | |
62 | PL_start_env.je_mustcatch = TRUE; \ | |
63 | PL_top_env = &PL_start_env; \ | |
64 | } STMT_END | |
65 | ||
66 | /* | |
67 | * PERL_FLEXIBLE_EXCEPTIONS | |
68 | * | |
69 | * All the flexible exceptions code has been removed. | |
70 | * See the following threads for details: | |
71 | * | |
72 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html | |
73 | * | |
74 | * Joshua's original patches (which weren't applied) and discussion: | |
75 | * | |
76 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html | |
77 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html | |
78 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html | |
79 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html | |
80 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html | |
81 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html | |
82 | * | |
83 | * Chip's reworked patch and discussion: | |
84 | * | |
85 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html | |
86 | * | |
87 | * The flaw in these patches (which went unnoticed at the time) was | |
88 | * that they moved some code that could potentially die() out of the | |
89 | * region protected by the setjmp()s. This caused exceptions within | |
90 | * END blocks and such to not be handled by the correct setjmp(). | |
91 | * | |
92 | * The original patches that introduces flexible exceptions were: | |
93 | * | |
94 | * http://public.activestate.com/cgi-bin/perlbrowse?patch=3386 | |
95 | * http://public.activestate.com/cgi-bin/perlbrowse?patch=5162 | |
96 | */ | |
97 | ||
98 | #define dJMPENV JMPENV cur_env | |
99 | ||
100 | #define JMPENV_PUSH(v) \ | |
101 | STMT_START { \ | |
102 | DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \ | |
ca0270c4 | 103 | (void*)&cur_env, (void*)PL_top_env)); \ |
0d2925a6 DM |
104 | cur_env.je_prev = PL_top_env; \ |
105 | OP_REG_TO_MEM; \ | |
106 | cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \ | |
107 | OP_MEM_TO_REG; \ | |
108 | PL_top_env = &cur_env; \ | |
109 | cur_env.je_mustcatch = FALSE; \ | |
110 | (v) = cur_env.je_ret; \ | |
111 | } STMT_END | |
112 | ||
113 | #define JMPENV_POP \ | |
114 | STMT_START { \ | |
115 | DEBUG_l(Perl_deb(aTHX_ "popping jumplevel was %p, now %p\n", \ | |
ca0270c4 | 116 | (void*)PL_top_env, (void*)cur_env.je_prev)); \ |
0d2925a6 DM |
117 | PL_top_env = cur_env.je_prev; \ |
118 | } STMT_END | |
119 | ||
120 | #define JMPENV_JUMP(v) \ | |
121 | STMT_START { \ | |
122 | OP_REG_TO_MEM; \ | |
123 | if (PL_top_env->je_prev) \ | |
124 | PerlProc_longjmp(PL_top_env->je_buf, (v)); \ | |
125 | if ((v) == 2) \ | |
37038d91 | 126 | PerlProc_exit(STATUS_EXIT); \ |
0d2925a6 DM |
127 | PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \ |
128 | PerlProc_exit(1); \ | |
129 | } STMT_END | |
130 | ||
131 | #define CATCH_GET (PL_top_env->je_mustcatch) | |
132 | #define CATCH_SET(v) (PL_top_env->je_mustcatch = (v)) | |
133 | ||
134 | ||
5ac1e9b2 | 135 | #include "mydtrace.h" |
0d2925a6 | 136 | |
79072805 LW |
137 | struct cop { |
138 | BASEOP | |
d7f23a06 NC |
139 | /* On LP64 putting this here takes advantage of the fact that BASEOP isn't |
140 | an exact multiple of 8 bytes to save structure padding. */ | |
141 | line_t cop_line; /* line # of this command */ | |
dca6062a | 142 | /* label for this construct is now stored in cop_hints_hash */ |
57843af0 | 143 | #ifdef USE_ITHREADS |
11faa288 | 144 | char * cop_stashpv; /* package line was compiled in */ |
57843af0 GS |
145 | char * cop_file; /* file name the following line # is from */ |
146 | #else | |
11faa288 | 147 | HV * cop_stash; /* package line was compiled in */ |
79072805 | 148 | GV * cop_filegv; /* file the following line # is from */ |
57843af0 | 149 | #endif |
d5ec2987 | 150 | U32 cop_hints; /* hints bits from pragmata */ |
a0d0e21e | 151 | U32 cop_seq; /* parse sequence number */ |
72dc9ed5 NC |
152 | /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */ |
153 | STRLEN * cop_warnings; /* lexical warnings bitmask */ | |
b3ca2e83 NC |
154 | /* compile time state of %^H. See the comment in op.c for how this is |
155 | used to recreate a hash to return from caller. */ | |
c28fe1ec | 156 | struct refcounted_he * cop_hints_hash; |
79072805 LW |
157 | }; |
158 | ||
57843af0 GS |
159 | #ifdef USE_ITHREADS |
160 | # define CopFILE(c) ((c)->cop_file) | |
161 | # define CopFILEGV(c) (CopFILE(c) \ | |
a0714e2c | 162 | ? gv_fetchfile(CopFILE(c)) : NULL) |
083fcd59 | 163 | |
7e4e8c89 NC |
164 | # ifdef NETWARE |
165 | # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) | |
d9095cec | 166 | # define CopFILE_setn(c,pv,l) ((c)->cop_file = savepv((pv),(l))) |
7e4e8c89 NC |
167 | # else |
168 | # define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) | |
d9095cec | 169 | # define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l))) |
7e4e8c89 | 170 | # endif |
083fcd59 | 171 | |
57843af0 | 172 | # define CopFILESV(c) (CopFILE(c) \ |
a0714e2c | 173 | ? GvSV(gv_fetchfile(CopFILE(c))) : NULL) |
57843af0 | 174 | # define CopFILEAV(c) (CopFILE(c) \ |
7d49f689 | 175 | ? GvAV(gv_fetchfile(CopFILE(c))) : NULL) |
8688788e SH |
176 | # ifdef DEBUGGING |
177 | # define CopFILEAVx(c) (assert(CopFILE(c)), \ | |
36c7798d | 178 | GvAV(gv_fetchfile(CopFILE(c)))) |
8688788e SH |
179 | # else |
180 | # define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c)))) | |
181 | # endif | |
57843af0 | 182 | # define CopSTASHPV(c) ((c)->cop_stashpv) |
083fcd59 | 183 | |
7e4e8c89 | 184 | # ifdef NETWARE |
bd61b366 | 185 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL)) |
7e4e8c89 NC |
186 | # else |
187 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) | |
188 | # endif | |
083fcd59 | 189 | |
11faa288 | 190 | # define CopSTASH(c) (CopSTASHPV(c) \ |
5c284bb0 | 191 | ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL) |
bd61b366 | 192 | # define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL) |
ed221c57 | 193 | # define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv)) |
7e4e8c89 NC |
194 | # ifdef NETWARE |
195 | # define CopSTASH_free(c) SAVECOPSTASH_FREE(c) | |
7e4e8c89 NC |
196 | # define CopFILE_free(c) SAVECOPFILE_FREE(c) |
197 | # else | |
ed221c57 | 198 | # define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) |
bd61b366 | 199 | # define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL)) |
7e4e8c89 | 200 | # endif |
57843af0 GS |
201 | #else |
202 | # define CopFILEGV(c) ((c)->cop_filegv) | |
f4dd75d9 GS |
203 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv)) |
204 | # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv)) | |
d9095cec | 205 | # define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0)) |
a0714e2c | 206 | # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL) |
7d49f689 | 207 | # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL) |
8688788e SH |
208 | # ifdef DEBUGGING |
209 | # define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c))) | |
210 | # else | |
211 | # define CopFILEAVx(c) (GvAV(CopFILEGV(c))) | |
212 | # endif | |
be46dfad RGS |
213 | # define CopFILE(c) (CopFILEGV(c) && GvSV(CopFILEGV(c)) \ |
214 | ? SvPVX(GvSV(CopFILEGV(c))) : NULL) | |
57843af0 | 215 | # define CopSTASH(c) ((c)->cop_stash) |
f4dd75d9 | 216 | # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) |
bd61b366 | 217 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL) |
f4dd75d9 GS |
218 | /* cop_stash is not refcounted */ |
219 | # define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD)) | |
220 | # define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv)) | |
05ec9bb3 | 221 | # define CopSTASH_free(c) |
a0714e2c | 222 | # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL)) |
05ec9bb3 | 223 | |
57843af0 | 224 | #endif /* USE_ITHREADS */ |
dca6062a NC |
225 | #define CopLABEL(c) Perl_fetch_cop_label(aTHX_ (c)->cop_hints_hash, NULL, NULL) |
226 | #define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL) | |
57843af0 | 227 | |
ed094faf | 228 | #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
cc49e20b | 229 | #define CopLINE(c) ((c)->cop_line) |
57843af0 GS |
230 | #define CopLINE_inc(c) (++CopLINE(c)) |
231 | #define CopLINE_dec(c) (--CopLINE(c)) | |
232 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) | |
cc49e20b | 233 | |
248c2a4d CN |
234 | /* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */ |
235 | #ifdef MACOS_TRADITIONAL | |
236 | # define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c)) | |
237 | #else | |
238 | # define OutCopFILE(c) CopFILE(c) | |
239 | #endif | |
240 | ||
7b0bddfa NC |
241 | /* If $[ is non-zero, it's stored in cop_hints under the key "$[", and |
242 | HINT_ARYBASE is set to indicate this. | |
243 | Setting it is ineficient due to the need to create 2 mortal SVs, but as | |
244 | using $[ is highly discouraged, no sane Perl code will be using it. */ | |
245 | #define CopARYBASE_get(c) \ | |
246 | ((CopHINTS_get(c) & HINT_ARYBASE) \ | |
c28fe1ec NC |
247 | ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \ |
248 | "$[", 2, 0, 0)) \ | |
7b0bddfa NC |
249 | : 0) |
250 | #define CopARYBASE_set(c, b) STMT_START { \ | |
d5ec2987 NC |
251 | if (b || ((c)->cop_hints & HINT_ARYBASE)) { \ |
252 | (c)->cop_hints |= HINT_ARYBASE; \ | |
7b0bddfa NC |
253 | if ((c) == &PL_compiling) \ |
254 | PL_hints |= HINT_LOCALIZE_HH | HINT_ARYBASE; \ | |
c28fe1ec NC |
255 | (c)->cop_hints_hash \ |
256 | = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \ | |
84bafc02 | 257 | newSVpvs_flags("$[", SVs_TEMP), \ |
7b0bddfa NC |
258 | sv_2mortal(newSViv(b))); \ |
259 | } \ | |
260 | } STMT_END | |
fc15ae8f | 261 | |
623e6609 | 262 | /* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */ |
d5ec2987 | 263 | #define CopHINTS_get(c) ((c)->cop_hints + 0) |
623e6609 | 264 | #define CopHINTS_set(c, h) STMT_START { \ |
d5ec2987 | 265 | (c)->cop_hints = (h); \ |
623e6609 NC |
266 | } STMT_END |
267 | ||
79072805 LW |
268 | /* |
269 | * Here we have some enormously heavy (or at least ponderous) wizardry. | |
270 | */ | |
271 | ||
272 | /* subroutine context */ | |
273 | struct block_sub { | |
f9c764c5 | 274 | OP * retop; /* op to execute on exit from sub */ |
8e663997 NC |
275 | /* Above here is the same for sub, format and eval. */ |
276 | CV * cv; | |
f9c764c5 | 277 | /* Above here is the same for sub and format. */ |
79072805 LW |
278 | AV * savearray; |
279 | AV * argarray; | |
bb172083 | 280 | I32 olddepth; |
f3548bdc | 281 | PAD *oldcomppad; |
f9c764c5 NC |
282 | }; |
283 | ||
284 | ||
285 | /* format context */ | |
286 | struct block_format { | |
f39bc417 | 287 | OP * retop; /* op to execute on exit from sub */ |
8e663997 NC |
288 | /* Above here is the same for sub, format and eval. */ |
289 | CV * cv; | |
f9c764c5 NC |
290 | /* Above here is the same for sub and format. */ |
291 | GV * gv; | |
292 | GV * dfoutgv; | |
79072805 LW |
293 | }; |
294 | ||
b36bdeca DM |
295 | /* base for the next two macros. Don't use directly. |
296 | * Note that the refcnt of the cv is incremented twice; The CX one is | |
297 | * decremented by LEAVESUB, the other by LEAVE. */ | |
298 | ||
ee98a1d6 | 299 | #define PUSHSUB_BASE(cx) \ |
5ac1e9b2 | 300 | ENTRY_PROBE(GvENAME(CvGV(cv)), \ |
c6903450 NC |
301 | CopFILE((const COP *)CvSTART(cv)), \ |
302 | CopLINE((const COP *)CvSTART(cv))); \ | |
5ac1e9b2 | 303 | \ |
79072805 | 304 | cx->blk_sub.cv = cv; \ |
b8f55b69 | 305 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
ae423868 | 306 | cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \ |
5f66b61c | 307 | cx->blk_sub.retop = NULL; \ |
b36bdeca | 308 | if (!CvDEPTH(cv)) { \ |
74c765eb AL |
309 | SvREFCNT_inc_simple_void_NN(cv); \ |
310 | SvREFCNT_inc_simple_void_NN(cv); \ | |
b36bdeca DM |
311 | SAVEFREESV(cv); \ |
312 | } | |
313 | ||
ee98a1d6 DM |
314 | |
315 | #define PUSHSUB(cx) \ | |
316 | PUSHSUB_BASE(cx) \ | |
446d0787 | 317 | cx->blk_u16 = PL_op->op_private & \ |
cc8d50a7 | 318 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); |
79072805 | 319 | |
ee98a1d6 DM |
320 | /* variant for use by OP_DBSTATE, where op_private holds hint bits */ |
321 | #define PUSHSUB_DB(cx) \ | |
322 | PUSHSUB_BASE(cx) \ | |
446d0787 | 323 | cx->blk_u16 = 0; |
ee98a1d6 DM |
324 | |
325 | ||
10067d9a | 326 | #define PUSHFORMAT(cx, retop) \ |
f9c764c5 NC |
327 | cx->blk_format.cv = cv; \ |
328 | cx->blk_format.gv = gv; \ | |
329 | cx->blk_format.retop = (retop); \ | |
f9c764c5 NC |
330 | cx->blk_format.dfoutgv = PL_defoutgv; \ |
331 | SvREFCNT_inc_void(cx->blk_format.dfoutgv) | |
79072805 | 332 | |
3db8f154 | 333 | #define POP_SAVEARRAY() \ |
6d4ff0d2 | 334 | STMT_START { \ |
3280af22 | 335 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
a8bba7fa | 336 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
6d4ff0d2 | 337 | } STMT_END |
6d4ff0d2 | 338 | |
ecf8e9dd | 339 | /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't |
8e09340b GS |
340 | * leave any (a fast av_clear(ary), basically) */ |
341 | #define CLEAR_ARGARRAY(ary) \ | |
342 | STMT_START { \ | |
343 | AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \ | |
9c6bc640 | 344 | AvARRAY(ary) = AvALLOC(ary); \ |
8e09340b GS |
345 | AvFILLp(ary) = -1; \ |
346 | } STMT_END | |
7766f137 | 347 | |
b0d9ce38 GS |
348 | #define POPSUB(cx,sv) \ |
349 | STMT_START { \ | |
8f629a87 NC |
350 | RETURN_PROBE(GvENAME(CvGV((const CV*)cx->blk_sub.cv)), \ |
351 | CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \ | |
352 | CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \ | |
5ac1e9b2 | 353 | \ |
bafb2adc | 354 | if (CxHASARGS(cx)) { \ |
7766f137 | 355 | POP_SAVEARRAY(); \ |
d8b46c1b | 356 | /* abandon @_ if it got reified */ \ |
a8bba7fa | 357 | if (AvREAL(cx->blk_sub.argarray)) { \ |
e2d306cb | 358 | const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ |
a8bba7fa GS |
359 | SvREFCNT_dec(cx->blk_sub.argarray); \ |
360 | cx->blk_sub.argarray = newAV(); \ | |
361 | av_extend(cx->blk_sub.argarray, fill); \ | |
11ca45c0 | 362 | AvREIFY_only(cx->blk_sub.argarray); \ |
b1bc3f34 | 363 | CX_CURPAD_SV(cx->blk_sub, 0) = MUTABLE_SV(cx->blk_sub.argarray); \ |
d8b46c1b | 364 | } \ |
7766f137 | 365 | else { \ |
8e09340b | 366 | CLEAR_ARGARRAY(cx->blk_sub.argarray); \ |
7766f137 | 367 | } \ |
79072805 | 368 | } \ |
b1bc3f34 | 369 | sv = MUTABLE_SV(cx->blk_sub.cv); \ |
8f629a87 | 370 | if (sv && (CvDEPTH((const CV*)sv) = cx->blk_sub.olddepth)) \ |
a0714e2c | 371 | sv = NULL; \ |
b0d9ce38 GS |
372 | } STMT_END |
373 | ||
374 | #define LEAVESUB(sv) \ | |
375 | STMT_START { \ | |
376 | if (sv) \ | |
377 | SvREFCNT_dec(sv); \ | |
378 | } STMT_END | |
79072805 LW |
379 | |
380 | #define POPFORMAT(cx) \ | |
f9c764c5 NC |
381 | setdefout(cx->blk_format.dfoutgv); \ |
382 | SvREFCNT_dec(cx->blk_format.dfoutgv); | |
79072805 LW |
383 | |
384 | /* eval context */ | |
385 | struct block_eval { | |
8e663997 NC |
386 | OP * retop; /* op to execute on exit from eval */ |
387 | /* Above here is the same for sub, format and eval. */ | |
0f79a09d | 388 | SV * old_namesv; |
79072805 | 389 | OP * old_eval_root; |
748a9306 | 390 | SV * cur_text; |
2090ab20 | 391 | CV * cv; |
abd70938 | 392 | JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */ |
79072805 LW |
393 | }; |
394 | ||
17347a51 NC |
395 | /* If we ever need more than 512 op types, change the shift from 7. |
396 | blku_gimme is actually also only 2 bits, so could be merged with something. | |
397 | */ | |
398 | ||
399 | #define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F) | |
400 | #define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7) | |
85a64632 | 401 | |
6b75f042 | 402 | #define PUSHEVAL(cx,n) \ |
0f79a09d | 403 | STMT_START { \ |
17347a51 NC |
404 | assert(!(PL_in_eval & ~0x7F)); \ |
405 | assert(!(PL_op->op_type & ~0x1FF)); \ | |
406 | cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \ | |
a0714e2c | 407 | cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \ |
a8bba7fa | 408 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
bdc0bf6f | 409 | cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \ |
601f1833 | 410 | cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \ |
5f66b61c | 411 | cx->blk_eval.retop = NULL; \ |
abd70938 | 412 | cx->blk_eval.cur_top_env = PL_top_env; \ |
0f79a09d | 413 | } STMT_END |
79072805 LW |
414 | |
415 | #define POPEVAL(cx) \ | |
0f79a09d | 416 | STMT_START { \ |
85a64632 NC |
417 | PL_in_eval = CxOLD_IN_EVAL(cx); \ |
418 | optype = CxOLD_OP_TYPE(cx); \ | |
7766f137 | 419 | PL_eval_root = cx->blk_eval.old_eval_root; \ |
0f79a09d GS |
420 | if (cx->blk_eval.old_namesv) \ |
421 | sv_2mortal(cx->blk_eval.old_namesv); \ | |
422 | } STMT_END | |
79072805 LW |
423 | |
424 | /* loop context */ | |
425 | struct block_loop { | |
79072805 | 426 | I32 resetsp; |
022eaa24 NC |
427 | LOOP * my_op; /* My op, that contains redo, next and last ops. */ |
428 | /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence | |
429 | why next_op is conditionally defined below.) */ | |
7766f137 | 430 | #ifdef USE_ITHREADS |
e846cb92 NC |
431 | PAD *oldcomppad; /* Also used for the GV, if targoffset is 0 */ |
432 | /* This is also accesible via cx->blk_loop.my_op->op_targ */ | |
433 | PADOFFSET targoffset; | |
7766f137 | 434 | #else |
022eaa24 | 435 | OP * next_op; |
79072805 | 436 | SV ** itervar; |
7766f137 | 437 | #endif |
493b0a3c | 438 | union { |
d01136d6 BS |
439 | struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/ |
440 | AV * ary; /* use the stack if this is NULL */ | |
441 | IV ix; | |
442 | } ary; | |
443 | struct { /* valid if type is LOOP_LAZYIV */ | |
444 | IV cur; | |
445 | IV end; | |
446 | } lazyiv; | |
447 | struct { /* valid if type if LOOP_LAZYSV */ | |
448 | SV * cur; | |
449 | SV * end; /* maxiumum value (or minimum in reverse) */ | |
450 | } lazysv; | |
451 | } state_u; | |
79072805 LW |
452 | }; |
453 | ||
7766f137 GS |
454 | #ifdef USE_ITHREADS |
455 | # define CxITERVAR(c) \ | |
e846cb92 NC |
456 | ((c)->blk_loop.oldcomppad \ |
457 | ? (CxPADLOOP(c) \ | |
458 | ? &CX_CURPAD_SV( (c)->blk_loop, (c)->blk_loop.targoffset ) \ | |
459 | : &GvSV((GV*)(c)->blk_loop.oldcomppad)) \ | |
7766f137 | 460 | : (SV**)NULL) |
e846cb92 NC |
461 | # define CX_ITERDATA_SET(cx,idata,o) \ |
462 | if ((cx->blk_loop.targoffset = (o))) \ | |
463 | CX_CURPAD_SAVE(cx->blk_loop); \ | |
464 | else \ | |
465 | cx->blk_loop.oldcomppad = (idata); | |
7766f137 GS |
466 | #else |
467 | # define CxITERVAR(c) ((c)->blk_loop.itervar) | |
e846cb92 | 468 | # define CX_ITERDATA_SET(cx,ivar,o) \ |
09edbca0 | 469 | cx->blk_loop.itervar = (SV**)(ivar); |
7766f137 | 470 | #endif |
b1cf8b36 | 471 | #define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop)) |
ae423868 | 472 | #define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS) |
446d0787 | 473 | #define CxLVAL(c) (0 + (c)->blk_u16) |
7766f137 | 474 | |
022eaa24 NC |
475 | #ifdef USE_ITHREADS |
476 | # define PUSHLOOP_OP_NEXT /* No need to do anything. */ | |
477 | # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0) | |
478 | #else | |
479 | # define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop | |
480 | # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0) | |
481 | #endif | |
482 | ||
3b719c58 NC |
483 | #define PUSHLOOP_PLAIN(cx, s) \ |
484 | cx->blk_loop.resetsp = s - PL_stack_base; \ | |
485 | cx->blk_loop.my_op = cLOOP; \ | |
486 | PUSHLOOP_OP_NEXT; \ | |
d01136d6 BS |
487 | cx->blk_loop.state_u.ary.ary = NULL; \ |
488 | cx->blk_loop.state_u.ary.ix = 0; \ | |
e846cb92 | 489 | CX_ITERDATA_SET(cx, NULL, 0); |
3b719c58 | 490 | |
e846cb92 | 491 | #define PUSHLOOP_FOR(cx, dat, s, offset) \ |
38a230cb | 492 | cx->blk_loop.resetsp = s - PL_stack_base; \ |
022eaa24 NC |
493 | cx->blk_loop.my_op = cLOOP; \ |
494 | PUSHLOOP_OP_NEXT; \ | |
d01136d6 BS |
495 | cx->blk_loop.state_u.ary.ary = NULL; \ |
496 | cx->blk_loop.state_u.ary.ix = 0; \ | |
e846cb92 | 497 | CX_ITERDATA_SET(cx, dat, offset); |
79072805 LW |
498 | |
499 | #define POPLOOP(cx) \ | |
d01136d6 BS |
500 | if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \ |
501 | SvREFCNT_dec(cx->blk_loop.state_u.lazysv.cur); \ | |
502 | SvREFCNT_dec(cx->blk_loop.state_u.lazysv.end); \ | |
503 | } \ | |
d01136d6 BS |
504 | if (CxTYPE(cx) == CXt_LOOP_FOR) \ |
505 | SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); | |
79072805 | 506 | |
0d863452 RH |
507 | /* given/when context */ |
508 | struct block_givwhen { | |
509 | OP *leave_op; | |
510 | }; | |
511 | ||
512 | #define PUSHGIVEN(cx) \ | |
513 | cx->blk_givwhen.leave_op = cLOGOP->op_other; | |
514 | ||
515 | #define PUSHWHEN PUSHGIVEN | |
516 | ||
79072805 LW |
517 | /* context common to subroutines, evals and loops */ |
518 | struct block { | |
446d0787 | 519 | U8 blku_type; /* what kind of context this is */ |
2e0df0e8 | 520 | U8 blku_gimme; /* is this block running in list context? */ |
17347a51 | 521 | U16 blku_u16; /* used by block_sub and block_eval (so far) */ |
79072805 LW |
522 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
523 | COP * blku_oldcop; /* old curcop pointer */ | |
79072805 LW |
524 | I32 blku_oldmarksp; /* mark stack index */ |
525 | I32 blku_oldscopesp; /* scope stack index */ | |
526 | PMOP * blku_oldpm; /* values of pattern match vars */ | |
79072805 LW |
527 | |
528 | union { | |
529 | struct block_sub blku_sub; | |
f9c764c5 | 530 | struct block_format blku_format; |
79072805 LW |
531 | struct block_eval blku_eval; |
532 | struct block_loop blku_loop; | |
0d863452 | 533 | struct block_givwhen blku_givwhen; |
79072805 LW |
534 | } blk_u; |
535 | }; | |
536 | #define blk_oldsp cx_u.cx_blk.blku_oldsp | |
537 | #define blk_oldcop cx_u.cx_blk.blku_oldcop | |
79072805 LW |
538 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
539 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp | |
540 | #define blk_oldpm cx_u.cx_blk.blku_oldpm | |
541 | #define blk_gimme cx_u.cx_blk.blku_gimme | |
446d0787 | 542 | #define blk_u16 cx_u.cx_blk.blku_u16 |
79072805 | 543 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub |
f9c764c5 | 544 | #define blk_format cx_u.cx_blk.blk_u.blku_format |
79072805 LW |
545 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval |
546 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop | |
0d863452 | 547 | #define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen |
79072805 LW |
548 | |
549 | /* Enter a block. */ | |
8990e307 | 550 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 | 551 | cx->cx_type = t, \ |
3280af22 NIS |
552 | cx->blk_oldsp = sp - PL_stack_base, \ |
553 | cx->blk_oldcop = PL_curcop, \ | |
1aff0e91 | 554 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 | 555 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
3280af22 | 556 | cx->blk_oldpm = PL_curpm, \ |
eb160463 | 557 | cx->blk_gimme = (U8)gimme; \ |
bf49b057 | 558 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
1aff0e91 | 559 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
560 | |
561 | /* Exit a block (RETURN and LAST). */ | |
a0d0e21e | 562 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
1aff0e91 | 563 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
564 | PL_curcop = cx->blk_oldcop, \ |
565 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ | |
566 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
3280af22 NIS |
567 | pm = cx->blk_oldpm, \ |
568 | gimme = cx->blk_gimme; \ | |
b4ab917c | 569 | DEBUG_SCOPE("POPBLOCK"); \ |
bf49b057 | 570 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
22c35a8c | 571 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
572 | |
573 | /* Continue a block elsewhere (NEXT and REDO). */ | |
3280af22 | 574 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
1aff0e91 | 575 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
576 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
577 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
b4ab917c DM |
578 | PL_curpm = cx->blk_oldpm; \ |
579 | DEBUG_SCOPE("TOPBLOCK"); | |
79072805 LW |
580 | |
581 | /* substitution context */ | |
582 | struct subst { | |
446d0787 | 583 | U8 sbu_type; /* what kind of context this is */ |
1ed74d04 | 584 | U8 sbu_rflags; |
446d0787 | 585 | U16 sbu_rxtainted; /* matches struct block */ |
79072805 LW |
586 | I32 sbu_iters; |
587 | I32 sbu_maxiters; | |
4633a7c4 | 588 | I32 sbu_oldsave; |
79072805 LW |
589 | char * sbu_orig; |
590 | SV * sbu_dstr; | |
591 | SV * sbu_targ; | |
592 | char * sbu_s; | |
593 | char * sbu_m; | |
594 | char * sbu_strend; | |
c90c0ff4 | 595 | void * sbu_rxres; |
c07a80fd | 596 | REGEXP * sbu_rx; |
79072805 LW |
597 | }; |
598 | #define sb_iters cx_u.cx_subst.sbu_iters | |
599 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters | |
22e551b9 | 600 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 | 601 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc | 602 | #define sb_once cx_u.cx_subst.sbu_once |
603 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted | |
79072805 LW |
604 | #define sb_orig cx_u.cx_subst.sbu_orig |
605 | #define sb_dstr cx_u.cx_subst.sbu_dstr | |
606 | #define sb_targ cx_u.cx_subst.sbu_targ | |
607 | #define sb_s cx_u.cx_subst.sbu_s | |
608 | #define sb_m cx_u.cx_subst.sbu_m | |
609 | #define sb_strend cx_u.cx_subst.sbu_strend | |
c90c0ff4 | 610 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd | 611 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 | 612 | |
9c105995 NC |
613 | #ifdef PERL_CORE |
614 | # define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ | |
79072805 LW |
615 | cx->sb_iters = iters, \ |
616 | cx->sb_maxiters = maxiters, \ | |
22e551b9 | 617 | cx->sb_rflags = r_flags, \ |
4633a7c4 | 618 | cx->sb_oldsave = oldsave, \ |
71be2cbc | 619 | cx->sb_rxtainted = rxtainted, \ |
79072805 LW |
620 | cx->sb_orig = orig, \ |
621 | cx->sb_dstr = dstr, \ | |
622 | cx->sb_targ = targ, \ | |
623 | cx->sb_s = s, \ | |
624 | cx->sb_m = m, \ | |
625 | cx->sb_strend = strend, \ | |
4608196e | 626 | cx->sb_rxres = NULL, \ |
c07a80fd | 627 | cx->sb_rx = rx, \ |
1ed74d04 | 628 | cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \ |
e22ae1e2 | 629 | rxres_save(&cx->sb_rxres, rx); \ |
b69b0499 | 630 | (void)ReREFCNT_inc(rx) |
79072805 | 631 | |
9c105995 | 632 | # define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
e22ae1e2 DM |
633 | rxres_free(&cx->sb_rxres); \ |
634 | ReREFCNT_dec(cx->sb_rx) | |
9c105995 NC |
635 | #endif |
636 | ||
637 | #define CxONCE(cx) ((cx)->cx_type & CXp_ONCE) | |
79072805 LW |
638 | |
639 | struct context { | |
79072805 LW |
640 | union { |
641 | struct block cx_blk; | |
642 | struct subst cx_subst; | |
643 | } cx_u; | |
644 | }; | |
2e0df0e8 | 645 | #define cx_type cx_u.cx_subst.sbu_type |
6b35e009 | 646 | |
76753e7f NC |
647 | /* If you re-order these, there is also an array of uppercase names in perl.h |
648 | and a static array of context names in pp_ctl.c */ | |
3701055e | 649 | #define CXTYPEMASK 0xf |
79072805 | 650 | #define CXt_NULL 0 |
76753e7f NC |
651 | #define CXt_WHEN 1 |
652 | #define CXt_BLOCK 2 | |
653 | /* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a | |
654 | jump table in pp_ctl.c | |
655 | The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c | |
656 | */ | |
657 | #define CXt_GIVEN 3 | |
c6fdafd0 | 658 | /* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */ |
76753e7f NC |
659 | #define CXt_LOOP_FOR 4 |
660 | #define CXt_LOOP_PLAIN 5 | |
661 | #define CXt_LOOP_LAZYSV 6 | |
662 | #define CXt_LOOP_LAZYIV 7 | |
663 | #define CXt_SUB 8 | |
664 | #define CXt_FORMAT 9 | |
665 | #define CXt_EVAL 10 | |
666 | #define CXt_SUBST 11 | |
667 | /* SUBST doesn't feature in all switch statements. */ | |
79072805 | 668 | |
3701055e NC |
669 | /* private flags for CXt_SUB and CXt_NULL |
670 | However, this is checked in many places which do not check the type, so | |
671 | this bit needs to be kept clear for most everything else. For reasons I | |
672 | haven't investigated, it can coexist with CXp_FOR_DEF */ | |
1f27d788 NC |
673 | #define CXp_MULTICALL 0x10 /* part of a multicall (so don't |
674 | tear down context on exit). */ | |
9850bf21 | 675 | |
ae423868 | 676 | /* private flags for CXt_SUB and CXt_FORMAT */ |
1f27d788 | 677 | #define CXp_HASARGS 0x20 |
ae423868 | 678 | |
6b35e009 | 679 | /* private flags for CXt_EVAL */ |
1f27d788 NC |
680 | #define CXp_REAL 0x20 /* truly eval'', not a lookalike */ |
681 | #define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */ | |
6b35e009 | 682 | |
7766f137 | 683 | /* private flags for CXt_LOOP */ |
1f27d788 | 684 | #define CXp_FOR_DEF 0x10 /* foreach using $_ */ |
0d863452 | 685 | #ifdef USE_ITHREADS |
e846cb92 | 686 | # define CxPADLOOP(c) ((c)->blk_loop.targoffset) |
7766f137 | 687 | #endif |
e846cb92 | 688 | |
1ed74d04 NC |
689 | /* private flags for CXt_SUBST */ |
690 | #define CXp_ONCE 0x10 /* What was sbu_once in struct subst */ | |
7766f137 | 691 | |
6b35e009 | 692 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
76753e7f | 693 | #define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4) |
9850bf21 RH |
694 | #define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \ |
695 | == CXp_MULTICALL) | |
0588a150 | 696 | #define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \ |
7766f137 | 697 | == (CXt_EVAL|CXp_REAL)) |
0588a150 | 698 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \ |
1d76a5c3 | 699 | == (CXt_EVAL|CXp_TRYBLOCK)) |
3b719c58 NC |
700 | #define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) |
701 | #define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \ | |
702 | && ((c)->cx_type & CXp_FOR_DEF)) | |
6b35e009 | 703 | |
79072805 LW |
704 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
705 | ||
ccfc67b7 JH |
706 | /* |
707 | =head1 "Gimme" Values | |
708 | */ | |
954c1994 GS |
709 | |
710 | /* | |
711 | =for apidoc AmU||G_SCALAR | |
712 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and | |
713 | L<perlcall>. | |
714 | ||
715 | =for apidoc AmU||G_ARRAY | |
91e74348 | 716 | Used to indicate list context. See C<GIMME_V>, C<GIMME> and |
954c1994 GS |
717 | L<perlcall>. |
718 | ||
719 | =for apidoc AmU||G_VOID | |
720 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. | |
721 | ||
722 | =for apidoc AmU||G_DISCARD | |
723 | Indicates that arguments returned from a callback should be discarded. See | |
724 | L<perlcall>. | |
725 | ||
726 | =for apidoc AmU||G_EVAL | |
727 | ||
728 | Used to force a Perl C<eval> wrapper around a callback. See | |
729 | L<perlcall>. | |
730 | ||
731 | =for apidoc AmU||G_NOARGS | |
732 | ||
733 | Indicates that no arguments are being sent to a callback. See | |
734 | L<perlcall>. | |
735 | ||
736 | =cut | |
737 | */ | |
738 | ||
2f8edad0 NC |
739 | #define G_SCALAR 2 |
740 | #define G_ARRAY 3 | |
741 | #define G_VOID 1 | |
742 | #define G_WANT 3 | |
79072805 | 743 | |
864dbfa3 | 744 | /* extra flags for Perl_call_* routines */ |
2f8edad0 | 745 | #define G_DISCARD 4 /* Call FREETMPS. |
b54b4831 NC |
746 | Don't change this without consulting the |
747 | hash actions codes defined in hv.h */ | |
2f8edad0 NC |
748 | #define G_EVAL 8 /* Assume eval {} around subroutine call. */ |
749 | #define G_NOARGS 16 /* Don't construct a @_ array. */ | |
750 | #define G_KEEPERR 32 /* Append errors to $@, don't overwrite it */ | |
751 | #define G_NODEBUG 64 /* Disable debugging at toplevel. */ | |
752 | #define G_METHOD 128 /* Calling method. */ | |
c40f1585 | 753 | #define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or |
edb2152a | 754 | fold_constants. */ |
e336de0d | 755 | |
faef0170 HS |
756 | /* flag bits for PL_in_eval */ |
757 | #define EVAL_NULL 0 /* not in an eval */ | |
758 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ | |
759 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ | |
864dbfa3 | 760 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
6dc8a9e4 | 761 | #define EVAL_INREQUIRE 8 /* The code is being required. */ |
faef0170 | 762 | |
e336de0d GS |
763 | /* Support for switching (stack and block) contexts. |
764 | * This ensures magic doesn't invalidate local stack and cx pointers. | |
765 | */ | |
766 | ||
e788e7d3 GS |
767 | #define PERLSI_UNKNOWN -1 |
768 | #define PERLSI_UNDEF 0 | |
769 | #define PERLSI_MAIN 1 | |
770 | #define PERLSI_MAGIC 2 | |
771 | #define PERLSI_SORT 3 | |
772 | #define PERLSI_SIGNAL 4 | |
773 | #define PERLSI_OVERLOAD 5 | |
774 | #define PERLSI_DESTROY 6 | |
775 | #define PERLSI_WARNHOOK 7 | |
776 | #define PERLSI_DIEHOOK 8 | |
777 | #define PERLSI_REQUIRE 9 | |
e336de0d GS |
778 | |
779 | struct stackinfo { | |
780 | AV * si_stack; /* stack for current runlevel */ | |
781 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ | |
9bd87817 NC |
782 | struct stackinfo * si_prev; |
783 | struct stackinfo * si_next; | |
e336de0d GS |
784 | I32 si_cxix; /* current context index */ |
785 | I32 si_cxmax; /* maximum allocated index */ | |
786 | I32 si_type; /* type of runlevel */ | |
ce2f7c3b | 787 | I32 si_markoff; /* offset where markstack begins for us. |
e336de0d GS |
788 | * currently used only with DEBUGGING, |
789 | * but not #ifdef-ed for bincompat */ | |
790 | }; | |
791 | ||
792 | typedef struct stackinfo PERL_SI; | |
793 | ||
3280af22 NIS |
794 | #define cxstack (PL_curstackinfo->si_cxstack) |
795 | #define cxstack_ix (PL_curstackinfo->si_cxix) | |
796 | #define cxstack_max (PL_curstackinfo->si_cxmax) | |
e336de0d GS |
797 | |
798 | #ifdef DEBUGGING | |
ce2f7c3b GS |
799 | # define SET_MARK_OFFSET \ |
800 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack | |
e336de0d | 801 | #else |
ce2f7c3b | 802 | # define SET_MARK_OFFSET NOOP |
e336de0d GS |
803 | #endif |
804 | ||
d3acc0f7 | 805 | #define PUSHSTACKi(type) \ |
e336de0d | 806 | STMT_START { \ |
3280af22 | 807 | PERL_SI *next = PL_curstackinfo->si_next; \ |
e336de0d GS |
808 | if (!next) { \ |
809 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ | |
3280af22 NIS |
810 | next->si_prev = PL_curstackinfo; \ |
811 | PL_curstackinfo->si_next = next; \ | |
e336de0d GS |
812 | } \ |
813 | next->si_type = type; \ | |
814 | next->si_cxix = -1; \ | |
815 | AvFILLp(next->si_stack) = 0; \ | |
3280af22 NIS |
816 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
817 | PL_curstackinfo = next; \ | |
ce2f7c3b | 818 | SET_MARK_OFFSET; \ |
e336de0d GS |
819 | } STMT_END |
820 | ||
e788e7d3 | 821 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 | 822 | |
3095d977 GS |
823 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
824 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ | |
d3acc0f7 | 825 | #define POPSTACK \ |
e336de0d | 826 | STMT_START { \ |
39644a26 | 827 | dSP; \ |
c4420975 | 828 | PERL_SI * const prev = PL_curstackinfo->si_prev; \ |
e336de0d | 829 | if (!prev) { \ |
bf49b057 | 830 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d GS |
831 | my_exit(1); \ |
832 | } \ | |
3280af22 | 833 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d | 834 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 | 835 | PL_curstackinfo = prev; \ |
e336de0d GS |
836 | } STMT_END |
837 | ||
838 | #define POPSTACK_TO(s) \ | |
839 | STMT_START { \ | |
3280af22 | 840 | while (PL_curstack != s) { \ |
bac4b2ad | 841 | dounwind(-1); \ |
d3acc0f7 | 842 | POPSTACK; \ |
bac4b2ad | 843 | } \ |
e336de0d | 844 | } STMT_END |
923e4eb5 JH |
845 | |
846 | #define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling) | |
847 | #define IN_PERL_RUNTIME (PL_curcop != &PL_compiling) | |
848 | ||
9850bf21 RH |
849 | /* |
850 | =head1 Multicall Functions | |
851 | ||
852 | =for apidoc Ams||dMULTICALL | |
853 | Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>. | |
854 | ||
855 | =for apidoc Ams||PUSH_MULTICALL | |
856 | Opening bracket for a lightweight callback. | |
857 | See L<perlcall/Lightweight Callbacks>. | |
858 | ||
859 | =for apidoc Ams||MULTICALL | |
860 | Make a lightweight callback. See L<perlcall/Lightweight Callbacks>. | |
861 | ||
862 | =for apidoc Ams||POP_MULTICALL | |
863 | Closing bracket for a lightweight callback. | |
864 | See L<perlcall/Lightweight Callbacks>. | |
865 | ||
866 | =cut | |
867 | */ | |
868 | ||
869 | #define dMULTICALL \ | |
870 | SV **newsp; /* set by POPBLOCK */ \ | |
871 | PERL_CONTEXT *cx; \ | |
82f35e8b | 872 | CV *multicall_cv; \ |
9850bf21 RH |
873 | OP *multicall_cop; \ |
874 | bool multicall_oldcatch; \ | |
875 | U8 hasargs = 0 /* used by PUSHSUB */ | |
876 | ||
82f35e8b | 877 | #define PUSH_MULTICALL(the_cv) \ |
9850bf21 | 878 | STMT_START { \ |
0bcc34c2 AL |
879 | CV * const _nOnclAshIngNamE_ = the_cv; \ |
880 | CV * const cv = _nOnclAshIngNamE_; \ | |
881 | AV * const padlist = CvPADLIST(cv); \ | |
9850bf21 RH |
882 | ENTER; \ |
883 | multicall_oldcatch = CATCH_GET; \ | |
884 | SAVETMPS; SAVEVPTR(PL_op); \ | |
885 | CATCH_SET(TRUE); \ | |
886 | PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \ | |
887 | PUSHSUB(cx); \ | |
888 | if (++CvDEPTH(cv) >= 2) { \ | |
889 | PERL_STACK_OVERFLOW_CHECK(); \ | |
890 | Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \ | |
891 | } \ | |
892 | SAVECOMPPAD(); \ | |
893 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \ | |
82f35e8b | 894 | multicall_cv = cv; \ |
9850bf21 RH |
895 | multicall_cop = CvSTART(cv); \ |
896 | } STMT_END | |
897 | ||
898 | #define MULTICALL \ | |
899 | STMT_START { \ | |
900 | PL_op = multicall_cop; \ | |
901 | CALLRUNOPS(aTHX); \ | |
902 | } STMT_END | |
903 | ||
904 | #define POP_MULTICALL \ | |
905 | STMT_START { \ | |
82f35e8b RH |
906 | LEAVESUB(multicall_cv); \ |
907 | CvDEPTH(multicall_cv)--; \ | |
9850bf21 RH |
908 | POPBLOCK(cx,PL_curpm); \ |
909 | CATCH_SET(multicall_oldcatch); \ | |
910 | LEAVE; \ | |
911 | } STMT_END | |
b3ca2e83 NC |
912 | |
913 | /* | |
914 | * Local variables: | |
915 | * c-indentation-style: bsd | |
916 | * c-basic-offset: 4 | |
917 | * indent-tabs-mode: t | |
918 | * End: | |
919 | * | |
920 | * ex: set ts=8 sts=4 sw=4 noet: | |
921 | */ |