Commit | Line | Data |
a0d0e21e |
1 | /* cop.h |
79072805 |
2 | * |
1129b882 |
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 |
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 |
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 |
14 | */ |
15 | |
0d2925a6 |
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 |
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)); \ |
d3ab86be |
117 | assert(PL_top_env == &cur_env); \ |
0d2925a6 |
118 | PL_top_env = cur_env.je_prev; \ |
119 | } STMT_END |
120 | |
121 | #define JMPENV_JUMP(v) \ |
122 | STMT_START { \ |
123 | OP_REG_TO_MEM; \ |
124 | if (PL_top_env->je_prev) \ |
125 | PerlProc_longjmp(PL_top_env->je_buf, (v)); \ |
126 | if ((v) == 2) \ |
37038d91 |
127 | PerlProc_exit(STATUS_EXIT); \ |
0d2925a6 |
128 | PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \ |
129 | PerlProc_exit(1); \ |
130 | } STMT_END |
131 | |
132 | #define CATCH_GET (PL_top_env->je_mustcatch) |
133 | #define CATCH_SET(v) (PL_top_env->je_mustcatch = (v)) |
134 | |
135 | |
5ac1e9b2 |
136 | #include "mydtrace.h" |
0d2925a6 |
137 | |
79072805 |
138 | struct cop { |
139 | BASEOP |
d7f23a06 |
140 | /* On LP64 putting this here takes advantage of the fact that BASEOP isn't |
141 | an exact multiple of 8 bytes to save structure padding. */ |
142 | line_t cop_line; /* line # of this command */ |
dca6062a |
143 | /* label for this construct is now stored in cop_hints_hash */ |
57843af0 |
144 | #ifdef USE_ITHREADS |
11faa288 |
145 | char * cop_stashpv; /* package line was compiled in */ |
57843af0 |
146 | char * cop_file; /* file name the following line # is from */ |
147 | #else |
11faa288 |
148 | HV * cop_stash; /* package line was compiled in */ |
79072805 |
149 | GV * cop_filegv; /* file the following line # is from */ |
57843af0 |
150 | #endif |
d5ec2987 |
151 | U32 cop_hints; /* hints bits from pragmata */ |
a0d0e21e |
152 | U32 cop_seq; /* parse sequence number */ |
72dc9ed5 |
153 | /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */ |
154 | STRLEN * cop_warnings; /* lexical warnings bitmask */ |
b3ca2e83 |
155 | /* compile time state of %^H. See the comment in op.c for how this is |
156 | used to recreate a hash to return from caller. */ |
c28fe1ec |
157 | struct refcounted_he * cop_hints_hash; |
79072805 |
158 | }; |
159 | |
57843af0 |
160 | #ifdef USE_ITHREADS |
161 | # define CopFILE(c) ((c)->cop_file) |
162 | # define CopFILEGV(c) (CopFILE(c) \ |
a0714e2c |
163 | ? gv_fetchfile(CopFILE(c)) : NULL) |
083fcd59 |
164 | |
7e4e8c89 |
165 | # ifdef NETWARE |
166 | # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) |
d9095cec |
167 | # define CopFILE_setn(c,pv,l) ((c)->cop_file = savepv((pv),(l))) |
7e4e8c89 |
168 | # else |
169 | # define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) |
d9095cec |
170 | # define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l))) |
7e4e8c89 |
171 | # endif |
083fcd59 |
172 | |
57843af0 |
173 | # define CopFILESV(c) (CopFILE(c) \ |
a0714e2c |
174 | ? GvSV(gv_fetchfile(CopFILE(c))) : NULL) |
57843af0 |
175 | # define CopFILEAV(c) (CopFILE(c) \ |
7d49f689 |
176 | ? GvAV(gv_fetchfile(CopFILE(c))) : NULL) |
8688788e |
177 | # ifdef DEBUGGING |
178 | # define CopFILEAVx(c) (assert(CopFILE(c)), \ |
36c7798d |
179 | GvAV(gv_fetchfile(CopFILE(c)))) |
8688788e |
180 | # else |
181 | # define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c)))) |
182 | # endif |
57843af0 |
183 | # define CopSTASHPV(c) ((c)->cop_stashpv) |
083fcd59 |
184 | |
7e4e8c89 |
185 | # ifdef NETWARE |
bd61b366 |
186 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL)) |
7e4e8c89 |
187 | # else |
188 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) |
189 | # endif |
083fcd59 |
190 | |
11faa288 |
191 | # define CopSTASH(c) (CopSTASHPV(c) \ |
5c284bb0 |
192 | ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL) |
bd61b366 |
193 | # define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL) |
ed221c57 |
194 | # define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv)) |
7e4e8c89 |
195 | # ifdef NETWARE |
196 | # define CopSTASH_free(c) SAVECOPSTASH_FREE(c) |
7e4e8c89 |
197 | # define CopFILE_free(c) SAVECOPFILE_FREE(c) |
198 | # else |
ed221c57 |
199 | # define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) |
bd61b366 |
200 | # define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL)) |
7e4e8c89 |
201 | # endif |
57843af0 |
202 | #else |
203 | # define CopFILEGV(c) ((c)->cop_filegv) |
f4dd75d9 |
204 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv)) |
205 | # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv)) |
d9095cec |
206 | # define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0)) |
a0714e2c |
207 | # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL) |
7d49f689 |
208 | # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL) |
8688788e |
209 | # ifdef DEBUGGING |
210 | # define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c))) |
211 | # else |
212 | # define CopFILEAVx(c) (GvAV(CopFILEGV(c))) |
213 | # endif |
be46dfad |
214 | # define CopFILE(c) (CopFILEGV(c) && GvSV(CopFILEGV(c)) \ |
215 | ? SvPVX(GvSV(CopFILEGV(c))) : NULL) |
57843af0 |
216 | # define CopSTASH(c) ((c)->cop_stash) |
f4dd75d9 |
217 | # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) |
bd61b366 |
218 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL) |
f4dd75d9 |
219 | /* cop_stash is not refcounted */ |
220 | # define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD)) |
221 | # define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv)) |
05ec9bb3 |
222 | # define CopSTASH_free(c) |
a0714e2c |
223 | # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL)) |
05ec9bb3 |
224 | |
57843af0 |
225 | #endif /* USE_ITHREADS */ |
dca6062a |
226 | #define CopLABEL(c) Perl_fetch_cop_label(aTHX_ (c)->cop_hints_hash, NULL, NULL) |
227 | #define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL) |
57843af0 |
228 | |
ed094faf |
229 | #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
cc49e20b |
230 | #define CopLINE(c) ((c)->cop_line) |
57843af0 |
231 | #define CopLINE_inc(c) (++CopLINE(c)) |
232 | #define CopLINE_dec(c) (--CopLINE(c)) |
233 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) |
cc49e20b |
234 | |
248c2a4d |
235 | /* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */ |
e37778c2 |
236 | #define OutCopFILE(c) CopFILE(c) |
248c2a4d |
237 | |
7b0bddfa |
238 | /* If $[ is non-zero, it's stored in cop_hints under the key "$[", and |
239 | HINT_ARYBASE is set to indicate this. |
240 | Setting it is ineficient due to the need to create 2 mortal SVs, but as |
241 | using $[ is highly discouraged, no sane Perl code will be using it. */ |
242 | #define CopARYBASE_get(c) \ |
243 | ((CopHINTS_get(c) & HINT_ARYBASE) \ |
c28fe1ec |
244 | ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \ |
245 | "$[", 2, 0, 0)) \ |
7b0bddfa |
246 | : 0) |
247 | #define CopARYBASE_set(c, b) STMT_START { \ |
d5ec2987 |
248 | if (b || ((c)->cop_hints & HINT_ARYBASE)) { \ |
249 | (c)->cop_hints |= HINT_ARYBASE; \ |
f747ebd6 |
250 | if ((c) == &PL_compiling) { \ |
251 | SV *val = newSViv(b); \ |
252 | (void)hv_stores(GvHV(PL_hintgv), "$[", val); \ |
253 | mg_set(val); \ |
254 | PL_hints |= HINT_ARYBASE; \ |
255 | } else { \ |
256 | (c)->cop_hints_hash \ |
257 | = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \ |
84bafc02 |
258 | newSVpvs_flags("$[", SVs_TEMP), \ |
7b0bddfa |
259 | sv_2mortal(newSViv(b))); \ |
f747ebd6 |
260 | } \ |
7b0bddfa |
261 | } \ |
262 | } STMT_END |
fc15ae8f |
263 | |
623e6609 |
264 | /* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */ |
d5ec2987 |
265 | #define CopHINTS_get(c) ((c)->cop_hints + 0) |
623e6609 |
266 | #define CopHINTS_set(c, h) STMT_START { \ |
d5ec2987 |
267 | (c)->cop_hints = (h); \ |
623e6609 |
268 | } STMT_END |
269 | |
79072805 |
270 | /* |
271 | * Here we have some enormously heavy (or at least ponderous) wizardry. |
272 | */ |
273 | |
274 | /* subroutine context */ |
275 | struct block_sub { |
f9c764c5 |
276 | OP * retop; /* op to execute on exit from sub */ |
8e663997 |
277 | /* Above here is the same for sub, format and eval. */ |
278 | CV * cv; |
f9c764c5 |
279 | /* Above here is the same for sub and format. */ |
79072805 |
280 | AV * savearray; |
281 | AV * argarray; |
bb172083 |
282 | I32 olddepth; |
f3548bdc |
283 | PAD *oldcomppad; |
f9c764c5 |
284 | }; |
285 | |
286 | |
287 | /* format context */ |
288 | struct block_format { |
f39bc417 |
289 | OP * retop; /* op to execute on exit from sub */ |
8e663997 |
290 | /* Above here is the same for sub, format and eval. */ |
291 | CV * cv; |
f9c764c5 |
292 | /* Above here is the same for sub and format. */ |
293 | GV * gv; |
294 | GV * dfoutgv; |
79072805 |
295 | }; |
296 | |
b36bdeca |
297 | /* base for the next two macros. Don't use directly. |
298 | * Note that the refcnt of the cv is incremented twice; The CX one is |
299 | * decremented by LEAVESUB, the other by LEAVE. */ |
300 | |
ee98a1d6 |
301 | #define PUSHSUB_BASE(cx) \ |
5ac1e9b2 |
302 | ENTRY_PROBE(GvENAME(CvGV(cv)), \ |
c6903450 |
303 | CopFILE((const COP *)CvSTART(cv)), \ |
304 | CopLINE((const COP *)CvSTART(cv))); \ |
5ac1e9b2 |
305 | \ |
79072805 |
306 | cx->blk_sub.cv = cv; \ |
b8f55b69 |
307 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
ae423868 |
308 | cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \ |
5f66b61c |
309 | cx->blk_sub.retop = NULL; \ |
b36bdeca |
310 | if (!CvDEPTH(cv)) { \ |
74c765eb |
311 | SvREFCNT_inc_simple_void_NN(cv); \ |
312 | SvREFCNT_inc_simple_void_NN(cv); \ |
b36bdeca |
313 | SAVEFREESV(cv); \ |
314 | } |
315 | |
ee98a1d6 |
316 | |
317 | #define PUSHSUB(cx) \ |
318 | PUSHSUB_BASE(cx) \ |
446d0787 |
319 | cx->blk_u16 = PL_op->op_private & \ |
cc8d50a7 |
320 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); |
79072805 |
321 | |
ee98a1d6 |
322 | /* variant for use by OP_DBSTATE, where op_private holds hint bits */ |
323 | #define PUSHSUB_DB(cx) \ |
324 | PUSHSUB_BASE(cx) \ |
446d0787 |
325 | cx->blk_u16 = 0; |
ee98a1d6 |
326 | |
327 | |
10067d9a |
328 | #define PUSHFORMAT(cx, retop) \ |
f9c764c5 |
329 | cx->blk_format.cv = cv; \ |
330 | cx->blk_format.gv = gv; \ |
331 | cx->blk_format.retop = (retop); \ |
f9c764c5 |
332 | cx->blk_format.dfoutgv = PL_defoutgv; \ |
333 | SvREFCNT_inc_void(cx->blk_format.dfoutgv) |
79072805 |
334 | |
3db8f154 |
335 | #define POP_SAVEARRAY() \ |
6d4ff0d2 |
336 | STMT_START { \ |
3280af22 |
337 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
a8bba7fa |
338 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
6d4ff0d2 |
339 | } STMT_END |
6d4ff0d2 |
340 | |
ecf8e9dd |
341 | /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't |
8e09340b |
342 | * leave any (a fast av_clear(ary), basically) */ |
343 | #define CLEAR_ARGARRAY(ary) \ |
344 | STMT_START { \ |
345 | AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \ |
9c6bc640 |
346 | AvARRAY(ary) = AvALLOC(ary); \ |
8e09340b |
347 | AvFILLp(ary) = -1; \ |
348 | } STMT_END |
7766f137 |
349 | |
b0d9ce38 |
350 | #define POPSUB(cx,sv) \ |
351 | STMT_START { \ |
8f629a87 |
352 | RETURN_PROBE(GvENAME(CvGV((const CV*)cx->blk_sub.cv)), \ |
353 | CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \ |
354 | CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \ |
5ac1e9b2 |
355 | \ |
bafb2adc |
356 | if (CxHASARGS(cx)) { \ |
7766f137 |
357 | POP_SAVEARRAY(); \ |
d8b46c1b |
358 | /* abandon @_ if it got reified */ \ |
a8bba7fa |
359 | if (AvREAL(cx->blk_sub.argarray)) { \ |
e2d306cb |
360 | const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ |
a8bba7fa |
361 | SvREFCNT_dec(cx->blk_sub.argarray); \ |
362 | cx->blk_sub.argarray = newAV(); \ |
363 | av_extend(cx->blk_sub.argarray, fill); \ |
11ca45c0 |
364 | AvREIFY_only(cx->blk_sub.argarray); \ |
b1bc3f34 |
365 | CX_CURPAD_SV(cx->blk_sub, 0) = MUTABLE_SV(cx->blk_sub.argarray); \ |
d8b46c1b |
366 | } \ |
7766f137 |
367 | else { \ |
8e09340b |
368 | CLEAR_ARGARRAY(cx->blk_sub.argarray); \ |
7766f137 |
369 | } \ |
79072805 |
370 | } \ |
b1bc3f34 |
371 | sv = MUTABLE_SV(cx->blk_sub.cv); \ |
8f629a87 |
372 | if (sv && (CvDEPTH((const CV*)sv) = cx->blk_sub.olddepth)) \ |
a0714e2c |
373 | sv = NULL; \ |
b0d9ce38 |
374 | } STMT_END |
375 | |
376 | #define LEAVESUB(sv) \ |
377 | STMT_START { \ |
378 | if (sv) \ |
379 | SvREFCNT_dec(sv); \ |
380 | } STMT_END |
79072805 |
381 | |
382 | #define POPFORMAT(cx) \ |
f9c764c5 |
383 | setdefout(cx->blk_format.dfoutgv); \ |
384 | SvREFCNT_dec(cx->blk_format.dfoutgv); |
79072805 |
385 | |
386 | /* eval context */ |
387 | struct block_eval { |
8e663997 |
388 | OP * retop; /* op to execute on exit from eval */ |
389 | /* Above here is the same for sub, format and eval. */ |
0f79a09d |
390 | SV * old_namesv; |
79072805 |
391 | OP * old_eval_root; |
748a9306 |
392 | SV * cur_text; |
2090ab20 |
393 | CV * cv; |
abd70938 |
394 | JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */ |
79072805 |
395 | }; |
396 | |
17347a51 |
397 | /* If we ever need more than 512 op types, change the shift from 7. |
398 | blku_gimme is actually also only 2 bits, so could be merged with something. |
399 | */ |
400 | |
401 | #define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F) |
402 | #define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7) |
85a64632 |
403 | |
6b75f042 |
404 | #define PUSHEVAL(cx,n) \ |
0f79a09d |
405 | STMT_START { \ |
17347a51 |
406 | assert(!(PL_in_eval & ~0x7F)); \ |
407 | assert(!(PL_op->op_type & ~0x1FF)); \ |
408 | cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \ |
a0714e2c |
409 | cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \ |
a8bba7fa |
410 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
bdc0bf6f |
411 | cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \ |
601f1833 |
412 | cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \ |
5f66b61c |
413 | cx->blk_eval.retop = NULL; \ |
abd70938 |
414 | cx->blk_eval.cur_top_env = PL_top_env; \ |
0f79a09d |
415 | } STMT_END |
79072805 |
416 | |
417 | #define POPEVAL(cx) \ |
0f79a09d |
418 | STMT_START { \ |
85a64632 |
419 | PL_in_eval = CxOLD_IN_EVAL(cx); \ |
420 | optype = CxOLD_OP_TYPE(cx); \ |
7766f137 |
421 | PL_eval_root = cx->blk_eval.old_eval_root; \ |
0f79a09d |
422 | if (cx->blk_eval.old_namesv) \ |
423 | sv_2mortal(cx->blk_eval.old_namesv); \ |
424 | } STMT_END |
79072805 |
425 | |
426 | /* loop context */ |
427 | struct block_loop { |
79072805 |
428 | I32 resetsp; |
022eaa24 |
429 | LOOP * my_op; /* My op, that contains redo, next and last ops. */ |
430 | /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence |
431 | why next_op is conditionally defined below.) */ |
7766f137 |
432 | #ifdef USE_ITHREADS |
e846cb92 |
433 | PAD *oldcomppad; /* Also used for the GV, if targoffset is 0 */ |
434 | /* This is also accesible via cx->blk_loop.my_op->op_targ */ |
435 | PADOFFSET targoffset; |
7766f137 |
436 | #else |
022eaa24 |
437 | OP * next_op; |
79072805 |
438 | SV ** itervar; |
7766f137 |
439 | #endif |
493b0a3c |
440 | union { |
d01136d6 |
441 | struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/ |
442 | AV * ary; /* use the stack if this is NULL */ |
443 | IV ix; |
444 | } ary; |
445 | struct { /* valid if type is LOOP_LAZYIV */ |
446 | IV cur; |
447 | IV end; |
448 | } lazyiv; |
449 | struct { /* valid if type if LOOP_LAZYSV */ |
450 | SV * cur; |
451 | SV * end; /* maxiumum value (or minimum in reverse) */ |
452 | } lazysv; |
453 | } state_u; |
79072805 |
454 | }; |
455 | |
7766f137 |
456 | #ifdef USE_ITHREADS |
457 | # define CxITERVAR(c) \ |
e846cb92 |
458 | ((c)->blk_loop.oldcomppad \ |
459 | ? (CxPADLOOP(c) \ |
460 | ? &CX_CURPAD_SV( (c)->blk_loop, (c)->blk_loop.targoffset ) \ |
461 | : &GvSV((GV*)(c)->blk_loop.oldcomppad)) \ |
7766f137 |
462 | : (SV**)NULL) |
e846cb92 |
463 | # define CX_ITERDATA_SET(cx,idata,o) \ |
464 | if ((cx->blk_loop.targoffset = (o))) \ |
465 | CX_CURPAD_SAVE(cx->blk_loop); \ |
466 | else \ |
467 | cx->blk_loop.oldcomppad = (idata); |
7766f137 |
468 | #else |
469 | # define CxITERVAR(c) ((c)->blk_loop.itervar) |
e846cb92 |
470 | # define CX_ITERDATA_SET(cx,ivar,o) \ |
09edbca0 |
471 | cx->blk_loop.itervar = (SV**)(ivar); |
7766f137 |
472 | #endif |
b1cf8b36 |
473 | #define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop)) |
ae423868 |
474 | #define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS) |
446d0787 |
475 | #define CxLVAL(c) (0 + (c)->blk_u16) |
7766f137 |
476 | |
022eaa24 |
477 | #ifdef USE_ITHREADS |
478 | # define PUSHLOOP_OP_NEXT /* No need to do anything. */ |
479 | # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0) |
480 | #else |
481 | # define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop |
482 | # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0) |
483 | #endif |
484 | |
3b719c58 |
485 | #define PUSHLOOP_PLAIN(cx, s) \ |
486 | cx->blk_loop.resetsp = s - PL_stack_base; \ |
487 | cx->blk_loop.my_op = cLOOP; \ |
488 | PUSHLOOP_OP_NEXT; \ |
d01136d6 |
489 | cx->blk_loop.state_u.ary.ary = NULL; \ |
490 | cx->blk_loop.state_u.ary.ix = 0; \ |
e846cb92 |
491 | CX_ITERDATA_SET(cx, NULL, 0); |
3b719c58 |
492 | |
e846cb92 |
493 | #define PUSHLOOP_FOR(cx, dat, s, offset) \ |
38a230cb |
494 | cx->blk_loop.resetsp = s - PL_stack_base; \ |
022eaa24 |
495 | cx->blk_loop.my_op = cLOOP; \ |
496 | PUSHLOOP_OP_NEXT; \ |
d01136d6 |
497 | cx->blk_loop.state_u.ary.ary = NULL; \ |
498 | cx->blk_loop.state_u.ary.ix = 0; \ |
e846cb92 |
499 | CX_ITERDATA_SET(cx, dat, offset); |
79072805 |
500 | |
501 | #define POPLOOP(cx) \ |
d01136d6 |
502 | if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \ |
503 | SvREFCNT_dec(cx->blk_loop.state_u.lazysv.cur); \ |
504 | SvREFCNT_dec(cx->blk_loop.state_u.lazysv.end); \ |
505 | } \ |
d01136d6 |
506 | if (CxTYPE(cx) == CXt_LOOP_FOR) \ |
507 | SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); |
79072805 |
508 | |
0d863452 |
509 | /* given/when context */ |
510 | struct block_givwhen { |
511 | OP *leave_op; |
512 | }; |
513 | |
514 | #define PUSHGIVEN(cx) \ |
515 | cx->blk_givwhen.leave_op = cLOGOP->op_other; |
516 | |
517 | #define PUSHWHEN PUSHGIVEN |
518 | |
79072805 |
519 | /* context common to subroutines, evals and loops */ |
520 | struct block { |
446d0787 |
521 | U8 blku_type; /* what kind of context this is */ |
2e0df0e8 |
522 | U8 blku_gimme; /* is this block running in list context? */ |
17347a51 |
523 | U16 blku_u16; /* used by block_sub and block_eval (so far) */ |
79072805 |
524 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
525 | COP * blku_oldcop; /* old curcop pointer */ |
79072805 |
526 | I32 blku_oldmarksp; /* mark stack index */ |
527 | I32 blku_oldscopesp; /* scope stack index */ |
528 | PMOP * blku_oldpm; /* values of pattern match vars */ |
79072805 |
529 | |
530 | union { |
531 | struct block_sub blku_sub; |
f9c764c5 |
532 | struct block_format blku_format; |
79072805 |
533 | struct block_eval blku_eval; |
534 | struct block_loop blku_loop; |
0d863452 |
535 | struct block_givwhen blku_givwhen; |
79072805 |
536 | } blk_u; |
537 | }; |
538 | #define blk_oldsp cx_u.cx_blk.blku_oldsp |
539 | #define blk_oldcop cx_u.cx_blk.blku_oldcop |
79072805 |
540 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
541 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp |
542 | #define blk_oldpm cx_u.cx_blk.blku_oldpm |
543 | #define blk_gimme cx_u.cx_blk.blku_gimme |
446d0787 |
544 | #define blk_u16 cx_u.cx_blk.blku_u16 |
79072805 |
545 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub |
f9c764c5 |
546 | #define blk_format cx_u.cx_blk.blk_u.blku_format |
79072805 |
547 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval |
548 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop |
0d863452 |
549 | #define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen |
79072805 |
550 | |
551 | /* Enter a block. */ |
8990e307 |
552 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 |
553 | cx->cx_type = t, \ |
3280af22 |
554 | cx->blk_oldsp = sp - PL_stack_base, \ |
555 | cx->blk_oldcop = PL_curcop, \ |
1aff0e91 |
556 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 |
557 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
3280af22 |
558 | cx->blk_oldpm = PL_curpm, \ |
eb160463 |
559 | cx->blk_gimme = (U8)gimme; \ |
bf49b057 |
560 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
1aff0e91 |
561 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
79072805 |
562 | |
563 | /* Exit a block (RETURN and LAST). */ |
a0d0e21e |
564 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
1aff0e91 |
565 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 |
566 | PL_curcop = cx->blk_oldcop, \ |
567 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
568 | PL_scopestack_ix = cx->blk_oldscopesp, \ |
3280af22 |
569 | pm = cx->blk_oldpm, \ |
570 | gimme = cx->blk_gimme; \ |
b4ab917c |
571 | DEBUG_SCOPE("POPBLOCK"); \ |
bf49b057 |
572 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
22c35a8c |
573 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
79072805 |
574 | |
575 | /* Continue a block elsewhere (NEXT and REDO). */ |
3280af22 |
576 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
1aff0e91 |
577 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 |
578 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
579 | PL_scopestack_ix = cx->blk_oldscopesp, \ |
b4ab917c |
580 | PL_curpm = cx->blk_oldpm; \ |
581 | DEBUG_SCOPE("TOPBLOCK"); |
79072805 |
582 | |
583 | /* substitution context */ |
584 | struct subst { |
446d0787 |
585 | U8 sbu_type; /* what kind of context this is */ |
1ed74d04 |
586 | U8 sbu_rflags; |
446d0787 |
587 | U16 sbu_rxtainted; /* matches struct block */ |
79072805 |
588 | I32 sbu_iters; |
589 | I32 sbu_maxiters; |
4633a7c4 |
590 | I32 sbu_oldsave; |
79072805 |
591 | char * sbu_orig; |
592 | SV * sbu_dstr; |
593 | SV * sbu_targ; |
594 | char * sbu_s; |
595 | char * sbu_m; |
596 | char * sbu_strend; |
c90c0ff4 |
597 | void * sbu_rxres; |
c07a80fd |
598 | REGEXP * sbu_rx; |
79072805 |
599 | }; |
600 | #define sb_iters cx_u.cx_subst.sbu_iters |
601 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters |
22e551b9 |
602 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 |
603 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc |
604 | #define sb_once cx_u.cx_subst.sbu_once |
605 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted |
79072805 |
606 | #define sb_orig cx_u.cx_subst.sbu_orig |
607 | #define sb_dstr cx_u.cx_subst.sbu_dstr |
608 | #define sb_targ cx_u.cx_subst.sbu_targ |
609 | #define sb_s cx_u.cx_subst.sbu_s |
610 | #define sb_m cx_u.cx_subst.sbu_m |
611 | #define sb_strend cx_u.cx_subst.sbu_strend |
c90c0ff4 |
612 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd |
613 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 |
614 | |
9c105995 |
615 | #ifdef PERL_CORE |
616 | # define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 |
617 | cx->sb_iters = iters, \ |
618 | cx->sb_maxiters = maxiters, \ |
22e551b9 |
619 | cx->sb_rflags = r_flags, \ |
4633a7c4 |
620 | cx->sb_oldsave = oldsave, \ |
71be2cbc |
621 | cx->sb_rxtainted = rxtainted, \ |
79072805 |
622 | cx->sb_orig = orig, \ |
623 | cx->sb_dstr = dstr, \ |
624 | cx->sb_targ = targ, \ |
625 | cx->sb_s = s, \ |
626 | cx->sb_m = m, \ |
627 | cx->sb_strend = strend, \ |
4608196e |
628 | cx->sb_rxres = NULL, \ |
c07a80fd |
629 | cx->sb_rx = rx, \ |
1ed74d04 |
630 | cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \ |
e22ae1e2 |
631 | rxres_save(&cx->sb_rxres, rx); \ |
b69b0499 |
632 | (void)ReREFCNT_inc(rx) |
79072805 |
633 | |
9c105995 |
634 | # define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
e22ae1e2 |
635 | rxres_free(&cx->sb_rxres); \ |
636 | ReREFCNT_dec(cx->sb_rx) |
9c105995 |
637 | #endif |
638 | |
639 | #define CxONCE(cx) ((cx)->cx_type & CXp_ONCE) |
79072805 |
640 | |
641 | struct context { |
79072805 |
642 | union { |
643 | struct block cx_blk; |
644 | struct subst cx_subst; |
645 | } cx_u; |
646 | }; |
2e0df0e8 |
647 | #define cx_type cx_u.cx_subst.sbu_type |
6b35e009 |
648 | |
76753e7f |
649 | /* If you re-order these, there is also an array of uppercase names in perl.h |
650 | and a static array of context names in pp_ctl.c */ |
3701055e |
651 | #define CXTYPEMASK 0xf |
79072805 |
652 | #define CXt_NULL 0 |
76753e7f |
653 | #define CXt_WHEN 1 |
654 | #define CXt_BLOCK 2 |
655 | /* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a |
656 | jump table in pp_ctl.c |
657 | The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c |
658 | */ |
659 | #define CXt_GIVEN 3 |
c6fdafd0 |
660 | /* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */ |
76753e7f |
661 | #define CXt_LOOP_FOR 4 |
662 | #define CXt_LOOP_PLAIN 5 |
663 | #define CXt_LOOP_LAZYSV 6 |
664 | #define CXt_LOOP_LAZYIV 7 |
665 | #define CXt_SUB 8 |
666 | #define CXt_FORMAT 9 |
667 | #define CXt_EVAL 10 |
668 | #define CXt_SUBST 11 |
669 | /* SUBST doesn't feature in all switch statements. */ |
79072805 |
670 | |
3701055e |
671 | /* private flags for CXt_SUB and CXt_NULL |
672 | However, this is checked in many places which do not check the type, so |
673 | this bit needs to be kept clear for most everything else. For reasons I |
674 | haven't investigated, it can coexist with CXp_FOR_DEF */ |
1f27d788 |
675 | #define CXp_MULTICALL 0x10 /* part of a multicall (so don't |
676 | tear down context on exit). */ |
9850bf21 |
677 | |
ae423868 |
678 | /* private flags for CXt_SUB and CXt_FORMAT */ |
1f27d788 |
679 | #define CXp_HASARGS 0x20 |
ae423868 |
680 | |
6b35e009 |
681 | /* private flags for CXt_EVAL */ |
1f27d788 |
682 | #define CXp_REAL 0x20 /* truly eval'', not a lookalike */ |
683 | #define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */ |
6b35e009 |
684 | |
7766f137 |
685 | /* private flags for CXt_LOOP */ |
1f27d788 |
686 | #define CXp_FOR_DEF 0x10 /* foreach using $_ */ |
0d863452 |
687 | #ifdef USE_ITHREADS |
e846cb92 |
688 | # define CxPADLOOP(c) ((c)->blk_loop.targoffset) |
7766f137 |
689 | #endif |
e846cb92 |
690 | |
1ed74d04 |
691 | /* private flags for CXt_SUBST */ |
692 | #define CXp_ONCE 0x10 /* What was sbu_once in struct subst */ |
7766f137 |
693 | |
6b35e009 |
694 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
76753e7f |
695 | #define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4) |
9850bf21 |
696 | #define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \ |
697 | == CXp_MULTICALL) |
0588a150 |
698 | #define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \ |
7766f137 |
699 | == (CXt_EVAL|CXp_REAL)) |
0588a150 |
700 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \ |
1d76a5c3 |
701 | == (CXt_EVAL|CXp_TRYBLOCK)) |
3b719c58 |
702 | #define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) |
703 | #define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \ |
704 | && ((c)->cx_type & CXp_FOR_DEF)) |
6b35e009 |
705 | |
79072805 |
706 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
707 | |
ccfc67b7 |
708 | /* |
709 | =head1 "Gimme" Values |
710 | */ |
954c1994 |
711 | |
712 | /* |
713 | =for apidoc AmU||G_SCALAR |
714 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and |
715 | L<perlcall>. |
716 | |
717 | =for apidoc AmU||G_ARRAY |
91e74348 |
718 | Used to indicate list context. See C<GIMME_V>, C<GIMME> and |
954c1994 |
719 | L<perlcall>. |
720 | |
721 | =for apidoc AmU||G_VOID |
722 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. |
723 | |
724 | =for apidoc AmU||G_DISCARD |
725 | Indicates that arguments returned from a callback should be discarded. See |
726 | L<perlcall>. |
727 | |
728 | =for apidoc AmU||G_EVAL |
729 | |
730 | Used to force a Perl C<eval> wrapper around a callback. See |
731 | L<perlcall>. |
732 | |
733 | =for apidoc AmU||G_NOARGS |
734 | |
735 | Indicates that no arguments are being sent to a callback. See |
736 | L<perlcall>. |
737 | |
738 | =cut |
739 | */ |
740 | |
2f8edad0 |
741 | #define G_SCALAR 2 |
742 | #define G_ARRAY 3 |
743 | #define G_VOID 1 |
744 | #define G_WANT 3 |
79072805 |
745 | |
864dbfa3 |
746 | /* extra flags for Perl_call_* routines */ |
2f8edad0 |
747 | #define G_DISCARD 4 /* Call FREETMPS. |
b54b4831 |
748 | Don't change this without consulting the |
749 | hash actions codes defined in hv.h */ |
2f8edad0 |
750 | #define G_EVAL 8 /* Assume eval {} around subroutine call. */ |
751 | #define G_NOARGS 16 /* Don't construct a @_ array. */ |
752 | #define G_KEEPERR 32 /* Append errors to $@, don't overwrite it */ |
753 | #define G_NODEBUG 64 /* Disable debugging at toplevel. */ |
754 | #define G_METHOD 128 /* Calling method. */ |
c40f1585 |
755 | #define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or |
edb2152a |
756 | fold_constants. */ |
e336de0d |
757 | |
faef0170 |
758 | /* flag bits for PL_in_eval */ |
759 | #define EVAL_NULL 0 /* not in an eval */ |
760 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ |
761 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ |
864dbfa3 |
762 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
6dc8a9e4 |
763 | #define EVAL_INREQUIRE 8 /* The code is being required. */ |
faef0170 |
764 | |
e336de0d |
765 | /* Support for switching (stack and block) contexts. |
766 | * This ensures magic doesn't invalidate local stack and cx pointers. |
767 | */ |
768 | |
e788e7d3 |
769 | #define PERLSI_UNKNOWN -1 |
770 | #define PERLSI_UNDEF 0 |
771 | #define PERLSI_MAIN 1 |
772 | #define PERLSI_MAGIC 2 |
773 | #define PERLSI_SORT 3 |
774 | #define PERLSI_SIGNAL 4 |
775 | #define PERLSI_OVERLOAD 5 |
776 | #define PERLSI_DESTROY 6 |
777 | #define PERLSI_WARNHOOK 7 |
778 | #define PERLSI_DIEHOOK 8 |
779 | #define PERLSI_REQUIRE 9 |
e336de0d |
780 | |
781 | struct stackinfo { |
782 | AV * si_stack; /* stack for current runlevel */ |
783 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ |
9bd87817 |
784 | struct stackinfo * si_prev; |
785 | struct stackinfo * si_next; |
e336de0d |
786 | I32 si_cxix; /* current context index */ |
787 | I32 si_cxmax; /* maximum allocated index */ |
788 | I32 si_type; /* type of runlevel */ |
ce2f7c3b |
789 | I32 si_markoff; /* offset where markstack begins for us. |
e336de0d |
790 | * currently used only with DEBUGGING, |
791 | * but not #ifdef-ed for bincompat */ |
792 | }; |
793 | |
794 | typedef struct stackinfo PERL_SI; |
795 | |
3280af22 |
796 | #define cxstack (PL_curstackinfo->si_cxstack) |
797 | #define cxstack_ix (PL_curstackinfo->si_cxix) |
798 | #define cxstack_max (PL_curstackinfo->si_cxmax) |
e336de0d |
799 | |
800 | #ifdef DEBUGGING |
ce2f7c3b |
801 | # define SET_MARK_OFFSET \ |
802 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack |
e336de0d |
803 | #else |
ce2f7c3b |
804 | # define SET_MARK_OFFSET NOOP |
e336de0d |
805 | #endif |
806 | |
d3acc0f7 |
807 | #define PUSHSTACKi(type) \ |
e336de0d |
808 | STMT_START { \ |
3280af22 |
809 | PERL_SI *next = PL_curstackinfo->si_next; \ |
e336de0d |
810 | if (!next) { \ |
811 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ |
3280af22 |
812 | next->si_prev = PL_curstackinfo; \ |
813 | PL_curstackinfo->si_next = next; \ |
e336de0d |
814 | } \ |
815 | next->si_type = type; \ |
816 | next->si_cxix = -1; \ |
817 | AvFILLp(next->si_stack) = 0; \ |
3280af22 |
818 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
819 | PL_curstackinfo = next; \ |
ce2f7c3b |
820 | SET_MARK_OFFSET; \ |
e336de0d |
821 | } STMT_END |
822 | |
e788e7d3 |
823 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 |
824 | |
3095d977 |
825 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
826 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ |
d3acc0f7 |
827 | #define POPSTACK \ |
e336de0d |
828 | STMT_START { \ |
39644a26 |
829 | dSP; \ |
c4420975 |
830 | PERL_SI * const prev = PL_curstackinfo->si_prev; \ |
e336de0d |
831 | if (!prev) { \ |
bf49b057 |
832 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d |
833 | my_exit(1); \ |
834 | } \ |
3280af22 |
835 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d |
836 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 |
837 | PL_curstackinfo = prev; \ |
e336de0d |
838 | } STMT_END |
839 | |
840 | #define POPSTACK_TO(s) \ |
841 | STMT_START { \ |
3280af22 |
842 | while (PL_curstack != s) { \ |
bac4b2ad |
843 | dounwind(-1); \ |
d3acc0f7 |
844 | POPSTACK; \ |
bac4b2ad |
845 | } \ |
e336de0d |
846 | } STMT_END |
923e4eb5 |
847 | |
848 | #define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling) |
849 | #define IN_PERL_RUNTIME (PL_curcop != &PL_compiling) |
850 | |
9850bf21 |
851 | /* |
852 | =head1 Multicall Functions |
853 | |
854 | =for apidoc Ams||dMULTICALL |
855 | Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>. |
856 | |
857 | =for apidoc Ams||PUSH_MULTICALL |
858 | Opening bracket for a lightweight callback. |
859 | See L<perlcall/Lightweight Callbacks>. |
860 | |
861 | =for apidoc Ams||MULTICALL |
862 | Make a lightweight callback. See L<perlcall/Lightweight Callbacks>. |
863 | |
864 | =for apidoc Ams||POP_MULTICALL |
865 | Closing bracket for a lightweight callback. |
866 | See L<perlcall/Lightweight Callbacks>. |
867 | |
868 | =cut |
869 | */ |
870 | |
871 | #define dMULTICALL \ |
872 | SV **newsp; /* set by POPBLOCK */ \ |
873 | PERL_CONTEXT *cx; \ |
82f35e8b |
874 | CV *multicall_cv; \ |
9850bf21 |
875 | OP *multicall_cop; \ |
876 | bool multicall_oldcatch; \ |
877 | U8 hasargs = 0 /* used by PUSHSUB */ |
878 | |
82f35e8b |
879 | #define PUSH_MULTICALL(the_cv) \ |
9850bf21 |
880 | STMT_START { \ |
0bcc34c2 |
881 | CV * const _nOnclAshIngNamE_ = the_cv; \ |
882 | CV * const cv = _nOnclAshIngNamE_; \ |
883 | AV * const padlist = CvPADLIST(cv); \ |
9850bf21 |
884 | ENTER; \ |
885 | multicall_oldcatch = CATCH_GET; \ |
886 | SAVETMPS; SAVEVPTR(PL_op); \ |
887 | CATCH_SET(TRUE); \ |
1bbbfc50 |
888 | PUSHSTACKi(PERLSI_SORT); \ |
9850bf21 |
889 | PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \ |
890 | PUSHSUB(cx); \ |
891 | if (++CvDEPTH(cv) >= 2) { \ |
892 | PERL_STACK_OVERFLOW_CHECK(); \ |
893 | Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \ |
894 | } \ |
895 | SAVECOMPPAD(); \ |
896 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \ |
82f35e8b |
897 | multicall_cv = cv; \ |
9850bf21 |
898 | multicall_cop = CvSTART(cv); \ |
899 | } STMT_END |
900 | |
901 | #define MULTICALL \ |
902 | STMT_START { \ |
903 | PL_op = multicall_cop; \ |
904 | CALLRUNOPS(aTHX); \ |
905 | } STMT_END |
906 | |
907 | #define POP_MULTICALL \ |
908 | STMT_START { \ |
82f35e8b |
909 | LEAVESUB(multicall_cv); \ |
910 | CvDEPTH(multicall_cv)--; \ |
9850bf21 |
911 | POPBLOCK(cx,PL_curpm); \ |
1bbbfc50 |
912 | POPSTACK; \ |
9850bf21 |
913 | CATCH_SET(multicall_oldcatch); \ |
914 | LEAVE; \ |
1bbbfc50 |
915 | SPAGAIN; \ |
9850bf21 |
916 | } STMT_END |
b3ca2e83 |
917 | |
918 | /* |
919 | * Local variables: |
920 | * c-indentation-style: bsd |
921 | * c-basic-offset: 4 |
922 | * indent-tabs-mode: t |
923 | * End: |
924 | * |
925 | * ex: set ts=8 sts=4 sw=4 noet: |
926 | */ |