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make POPSUBST re-entrant safe
[perl5.git] / cop.h
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a0d0e21e 1/* cop.h
79072805 2 *
1129b882 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
8622e0e2 4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
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 9 * Control ops (cops) are one of the two ops OP_NEXTSTATE and OP_DBSTATE,
775e5718 10 * that (loosely speaking) are statement separators.
3ffa1527
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11 * They hold information important for lexical state and error reporting.
12 * At run time, PL_curcop is set to point to the most recently executed cop,
a3985cdc 13 * and thus can be used to determine our current state.
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14 */
15
0d2925a6 16/* A jmpenv packages the state required to perform a proper non-local jump.
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17 * Note that there is a PL_start_env initialized when perl starts, and
18 * PL_top_env points to this initially, so PL_top_env should always be
19 * non-null.
0d2925a6 20 *
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21 * Existence of a non-null PL_top_env->je_prev implies it is valid to call
22 * longjmp() at that runlevel (we make sure PL_start_env.je_prev is always
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23 * null to ensure this).
24 *
25 * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
26 * establish a local jmpenv to handle exception traps. Care must be taken
27 * to restore the previous value of je_mustcatch before exiting the
28 * stack frame iff JMPENV_PUSH was not called in that stack frame.
29 * GSAR 97-03-27
30 */
31
32struct jmpenv {
33 struct jmpenv * je_prev;
caa674f3 34 Sigjmp_buf je_buf; /* uninit if je_prev is NULL */
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35 int je_ret; /* last exception thrown */
36 bool je_mustcatch; /* need to call longjmp()? */
a68090fe 37 U16 je_old_delaymagic; /* saved PL_delaymagic */
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38};
39
40typedef struct jmpenv JMPENV;
41
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42/*
43 * How to build the first jmpenv.
44 *
45 * top_env needs to be non-zero. It points to an area
46 * in which longjmp() stuff is stored, as C callstack
47 * info there at least is thread specific this has to
48 * be per-thread. Otherwise a 'die' in a thread gives
49 * that thread the C stack of last thread to do an eval {}!
50 */
51
52#define JMPENV_BOOTSTRAP \
53 STMT_START { \
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54 PERL_POISON_EXPR(PoisonNew(&PL_start_env, 1, JMPENV));\
55 PL_top_env = &PL_start_env; \
56 PL_start_env.je_prev = NULL; \
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57 PL_start_env.je_ret = -1; \
58 PL_start_env.je_mustcatch = TRUE; \
a68090fe 59 PL_start_env.je_old_delaymagic = 0; \
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60 } STMT_END
61
62/*
63 * PERL_FLEXIBLE_EXCEPTIONS
64 *
65 * All the flexible exceptions code has been removed.
66 * See the following threads for details:
67 *
68 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html
69 *
70 * Joshua's original patches (which weren't applied) and discussion:
71 *
72 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
73 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
74 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
75 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
76 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
77 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
78 *
79 * Chip's reworked patch and discussion:
80 *
81 * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
82 *
83 * The flaw in these patches (which went unnoticed at the time) was
84 * that they moved some code that could potentially die() out of the
85 * region protected by the setjmp()s. This caused exceptions within
86 * END blocks and such to not be handled by the correct setjmp().
87 *
88 * The original patches that introduces flexible exceptions were:
89 *
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90 * http://perl5.git.perl.org/perl.git/commit/312caa8e97f1c7ee342a9895c2f0e749625b4929
91 * http://perl5.git.perl.org/perl.git/commit/14dd3ad8c9bf82cf09798a22cc89a9862dfd6d1a
92 *
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93 */
94
95#define dJMPENV JMPENV cur_env
96
97#define JMPENV_PUSH(v) \
98 STMT_START { \
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99 DEBUG_l({ \
100 int i = 0; JMPENV *p = PL_top_env; \
101 while (p) { i++; p = p->je_prev; } \
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102 Perl_deb(aTHX_ "JUMPENV_PUSH level=%d at %s:%d\n", \
103 i, __FILE__, __LINE__);}) \
0d2925a6 104 cur_env.je_prev = PL_top_env; \
0d2925a6 105 cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \
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106 PL_top_env = &cur_env; \
107 cur_env.je_mustcatch = FALSE; \
a68090fe 108 cur_env.je_old_delaymagic = PL_delaymagic; \
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109 (v) = cur_env.je_ret; \
110 } STMT_END
111
112#define JMPENV_POP \
113 STMT_START { \
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114 DEBUG_l({ \
115 int i = -1; JMPENV *p = PL_top_env; \
116 while (p) { i++; p = p->je_prev; } \
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117 Perl_deb(aTHX_ "JUMPENV_POP level=%d at %s:%d\n", \
118 i, __FILE__, __LINE__);}) \
d3ab86be 119 assert(PL_top_env == &cur_env); \
a68090fe 120 PL_delaymagic = cur_env.je_old_delaymagic; \
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121 PL_top_env = cur_env.je_prev; \
122 } STMT_END
123
124#define JMPENV_JUMP(v) \
125 STMT_START { \
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126 DEBUG_l({ \
127 int i = -1; JMPENV *p = PL_top_env; \
128 while (p) { i++; p = p->je_prev; } \
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129 Perl_deb(aTHX_ "JUMPENV_JUMP(%d) level=%d at %s:%d\n", \
130 (int)v, i, __FILE__, __LINE__);}) \
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131 if (PL_top_env->je_prev) \
132 PerlProc_longjmp(PL_top_env->je_buf, (v)); \
133 if ((v) == 2) \
37038d91 134 PerlProc_exit(STATUS_EXIT); \
5637ef5b 135 PerlIO_printf(PerlIO_stderr(), "panic: top_env, v=%d\n", (int)v); \
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136 PerlProc_exit(1); \
137 } STMT_END
138
139#define CATCH_GET (PL_top_env->je_mustcatch)
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140#define CATCH_SET(v) \
141 STMT_START { \
142 DEBUG_l( \
143 Perl_deb(aTHX_ \
144 "JUMPLEVEL set catch %d => %d (for %p) at %s:%d\n", \
145 PL_top_env->je_mustcatch, v, (void*)PL_top_env, \
146 __FILE__, __LINE__);) \
147 PL_top_env->je_mustcatch = (v); \
148 } STMT_END
0d2925a6 149
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150/*
151=head1 COP Hint Hashes
152*/
153
154typedef struct refcounted_he COPHH;
155
156#define COPHH_KEY_UTF8 REFCOUNTED_HE_KEY_UTF8
157
158/*
ffd08bbf 159=for apidoc Amx|SV *|cophh_fetch_pvn|const COPHH *cophh|const char *keypv|STRLEN keylen|U32 hash|U32 flags
20439bc7 160
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161Look up the entry in the cop hints hash C<cophh> with the key specified by
162C<keypv> and C<keylen>. If C<flags> has the C<COPHH_KEY_UTF8> bit set,
20439bc7 163the key octets are interpreted as UTF-8, otherwise they are interpreted
2d7f6611 164as Latin-1. C<hash> is a precomputed hash of the key string, or zero if
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165it has not been precomputed. Returns a mortal scalar copy of the value
166associated with the key, or C<&PL_sv_placeholder> if there is no value
167associated with the key.
168
169=cut
170*/
171
172#define cophh_fetch_pvn(cophh, keypv, keylen, hash, flags) \
173 Perl_refcounted_he_fetch_pvn(aTHX_ cophh, keypv, keylen, hash, flags)
174
175/*
ffd08bbf 176=for apidoc Amx|SV *|cophh_fetch_pvs|const COPHH *cophh|const char *key|U32 flags
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177
178Like L</cophh_fetch_pvn>, but takes a literal string instead of a
179string/length pair, and no precomputed hash.
180
181=cut
182*/
183
184#define cophh_fetch_pvs(cophh, key, flags) \
185 Perl_refcounted_he_fetch_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, flags)
186
187/*
ffd08bbf 188=for apidoc Amx|SV *|cophh_fetch_pv|const COPHH *cophh|const char *key|U32 hash|U32 flags
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189
190Like L</cophh_fetch_pvn>, but takes a nul-terminated string instead of
191a string/length pair.
192
193=cut
194*/
195
196#define cophh_fetch_pv(cophh, key, hash, flags) \
197 Perl_refcounted_he_fetch_pv(aTHX_ cophh, key, hash, flags)
198
199/*
ffd08bbf 200=for apidoc Amx|SV *|cophh_fetch_sv|const COPHH *cophh|SV *key|U32 hash|U32 flags
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201
202Like L</cophh_fetch_pvn>, but takes a Perl scalar instead of a
203string/length pair.
204
205=cut
206*/
207
208#define cophh_fetch_sv(cophh, key, hash, flags) \
209 Perl_refcounted_he_fetch_sv(aTHX_ cophh, key, hash, flags)
210
211/*
ffd08bbf 212=for apidoc Amx|HV *|cophh_2hv|const COPHH *cophh|U32 flags
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213
214Generates and returns a standard Perl hash representing the full set of
2d7f6611 215key/value pairs in the cop hints hash C<cophh>. C<flags> is currently
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216unused and must be zero.
217
218=cut
219*/
220
221#define cophh_2hv(cophh, flags) \
222 Perl_refcounted_he_chain_2hv(aTHX_ cophh, flags)
223
224/*
ffd08bbf 225=for apidoc Amx|COPHH *|cophh_copy|COPHH *cophh
20439bc7 226
2d7f6611 227Make and return a complete copy of the cop hints hash C<cophh>.
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228
229=cut
230*/
231
232#define cophh_copy(cophh) Perl_refcounted_he_inc(aTHX_ cophh)
233
234/*
ffd08bbf 235=for apidoc Amx|void|cophh_free|COPHH *cophh
20439bc7 236
2d7f6611 237Discard the cop hints hash C<cophh>, freeing all resources associated
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238with it.
239
240=cut
241*/
242
243#define cophh_free(cophh) Perl_refcounted_he_free(aTHX_ cophh)
244
245/*
ffd08bbf 246=for apidoc Amx|COPHH *|cophh_new_empty
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247
248Generate and return a fresh cop hints hash containing no entries.
249
250=cut
251*/
252
253#define cophh_new_empty() ((COPHH *)NULL)
254
255/*
ffd08bbf 256=for apidoc Amx|COPHH *|cophh_store_pvn|COPHH *cophh|const char *keypv|STRLEN keylen|U32 hash|SV *value|U32 flags
20439bc7 257
2d7f6611 258Stores a value, associated with a key, in the cop hints hash C<cophh>,
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259and returns the modified hash. The returned hash pointer is in general
260not the same as the hash pointer that was passed in. The input hash is
261consumed by the function, and the pointer to it must not be subsequently
262used. Use L</cophh_copy> if you need both hashes.
263
2d7f6611 264The key is specified by C<keypv> and C<keylen>. If C<flags> has the
20439bc7 265C<COPHH_KEY_UTF8> bit set, the key octets are interpreted as UTF-8,
2d7f6611 266otherwise they are interpreted as Latin-1. C<hash> is a precomputed
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267hash of the key string, or zero if it has not been precomputed.
268
2d7f6611 269C<value> is the scalar value to store for this key. C<value> is copied
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270by this function, which thus does not take ownership of any reference
271to it, and later changes to the scalar will not be reflected in the
272value visible in the cop hints hash. Complex types of scalar will not
273be stored with referential integrity, but will be coerced to strings.
274
275=cut
276*/
277
278#define cophh_store_pvn(cophh, keypv, keylen, hash, value, flags) \
279 Perl_refcounted_he_new_pvn(aTHX_ cophh, keypv, keylen, hash, value, flags)
280
281/*
ffd08bbf 282=for apidoc Amx|COPHH *|cophh_store_pvs|const COPHH *cophh|const char *key|SV *value|U32 flags
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283
284Like L</cophh_store_pvn>, but takes a literal string instead of a
285string/length pair, and no precomputed hash.
286
287=cut
288*/
289
290#define cophh_store_pvs(cophh, key, value, flags) \
291 Perl_refcounted_he_new_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, value, flags)
292
293/*
ffd08bbf 294=for apidoc Amx|COPHH *|cophh_store_pv|const COPHH *cophh|const char *key|U32 hash|SV *value|U32 flags
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295
296Like L</cophh_store_pvn>, but takes a nul-terminated string instead of
297a string/length pair.
298
299=cut
300*/
301
302#define cophh_store_pv(cophh, key, hash, value, flags) \
303 Perl_refcounted_he_new_pv(aTHX_ cophh, key, hash, value, flags)
304
305/*
ffd08bbf 306=for apidoc Amx|COPHH *|cophh_store_sv|const COPHH *cophh|SV *key|U32 hash|SV *value|U32 flags
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307
308Like L</cophh_store_pvn>, but takes a Perl scalar instead of a
309string/length pair.
310
311=cut
312*/
313
314#define cophh_store_sv(cophh, key, hash, value, flags) \
315 Perl_refcounted_he_new_sv(aTHX_ cophh, key, hash, value, flags)
316
317/*
ffd08bbf 318=for apidoc Amx|COPHH *|cophh_delete_pvn|COPHH *cophh|const char *keypv|STRLEN keylen|U32 hash|U32 flags
20439bc7 319
2d7f6611 320Delete a key and its associated value from the cop hints hash C<cophh>,
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321and returns the modified hash. The returned hash pointer is in general
322not the same as the hash pointer that was passed in. The input hash is
323consumed by the function, and the pointer to it must not be subsequently
324used. Use L</cophh_copy> if you need both hashes.
325
2d7f6611 326The key is specified by C<keypv> and C<keylen>. If C<flags> has the
20439bc7 327C<COPHH_KEY_UTF8> bit set, the key octets are interpreted as UTF-8,
2d7f6611 328otherwise they are interpreted as Latin-1. C<hash> is a precomputed
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329hash of the key string, or zero if it has not been precomputed.
330
331=cut
332*/
333
334#define cophh_delete_pvn(cophh, keypv, keylen, hash, flags) \
335 Perl_refcounted_he_new_pvn(aTHX_ cophh, keypv, keylen, hash, \
336 (SV *)NULL, flags)
337
338/*
ffd08bbf 339=for apidoc Amx|COPHH *|cophh_delete_pvs|const COPHH *cophh|const char *key|U32 flags
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340
341Like L</cophh_delete_pvn>, but takes a literal string instead of a
342string/length pair, and no precomputed hash.
343
344=cut
345*/
346
347#define cophh_delete_pvs(cophh, key, flags) \
348 Perl_refcounted_he_new_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, \
349 (SV *)NULL, flags)
350
351/*
ffd08bbf 352=for apidoc Amx|COPHH *|cophh_delete_pv|const COPHH *cophh|const char *key|U32 hash|U32 flags
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353
354Like L</cophh_delete_pvn>, but takes a nul-terminated string instead of
355a string/length pair.
356
357=cut
358*/
359
360#define cophh_delete_pv(cophh, key, hash, flags) \
361 Perl_refcounted_he_new_pv(aTHX_ cophh, key, hash, (SV *)NULL, flags)
362
363/*
ffd08bbf 364=for apidoc Amx|COPHH *|cophh_delete_sv|const COPHH *cophh|SV *key|U32 hash|U32 flags
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365
366Like L</cophh_delete_pvn>, but takes a Perl scalar instead of a
367string/length pair.
368
369=cut
370*/
371
372#define cophh_delete_sv(cophh, key, hash, flags) \
373 Perl_refcounted_he_new_sv(aTHX_ cophh, key, hash, (SV *)NULL, flags)
0d2925a6 374
5ac1e9b2 375#include "mydtrace.h"
0d2925a6 376
88df5f01
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377struct cop {
378 BASEOP
379 /* On LP64 putting this here takes advantage of the fact that BASEOP isn't
380 an exact multiple of 8 bytes to save structure padding. */
381 line_t cop_line; /* line # of this command */
382 /* label for this construct is now stored in cop_hints_hash */
57843af0 383#ifdef USE_ITHREADS
88df5f01
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384 PADOFFSET cop_stashoff; /* offset into PL_stashpad, for the
385 package the line was compiled in */
1dc74fdb 386 char * cop_file; /* file name the following line # is from */
57843af0 387#else
88df5f01 388 HV * cop_stash; /* package line was compiled in */
79072805 389 GV * cop_filegv; /* file the following line # is from */
57843af0 390#endif
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391 U32 cop_hints; /* hints bits from pragmata */
392 U32 cop_seq; /* parse sequence number */
393 /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */
394 STRLEN * cop_warnings; /* lexical warnings bitmask */
395 /* compile time state of %^H. See the comment in op.c for how this is
396 used to recreate a hash to return from caller. */
20439bc7 397 COPHH * cop_hints_hash;
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398};
399
57843af0 400#ifdef USE_ITHREADS
1dc74fdb
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401# define CopFILE(c) ((c)->cop_file)
402# define CopFILEGV(c) (CopFILE(c) \
403 ? gv_fetchfile(CopFILE(c)) : NULL)
404
405# ifdef NETWARE
406# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
d166b3ad 407# define CopFILE_setn(c,pv,l) ((c)->cop_file = savepvn((pv),(l)))
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408# else
409# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
410# define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l)))
411# endif
412
413# define CopFILESV(c) (CopFILE(c) \
414 ? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
415# define CopFILEAV(c) (CopFILE(c) \
416 ? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
417# define CopFILEAVx(c) (assert_(CopFILE(c)) \
418 GvAV(gv_fetchfile(CopFILE(c))))
083fcd59 419
d4d03940
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420# define CopSTASH(c) PL_stashpad[(c)->cop_stashoff]
421# define CopSTASH_set(c,hv) ((c)->cop_stashoff = (hv) \
422 ? alloccopstash(hv) \
423 : 0)
1dc74fdb
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424# ifdef NETWARE
425# define CopFILE_free(c) SAVECOPFILE_FREE(c)
426# else
427# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL))
428# endif
57843af0
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429#else
430# define CopFILEGV(c) ((c)->cop_filegv)
f4dd75d9 431# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
1dc74fdb
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432# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
433# define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
434# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
435# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
436# ifdef DEBUGGING
437# define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
438# else
439# define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
440# endif
441# define CopFILE(c) (CopFILEGV(c) \
442 ? GvNAME(CopFILEGV(c))+2 : NULL)
57843af0 443# define CopSTASH(c) ((c)->cop_stash)
f4dd75d9 444# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
a0714e2c 445# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
05ec9bb3 446
57843af0 447#endif /* USE_ITHREADS */
20439bc7 448
d4d03940
FC
449#define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
450 /* cop_stash is not refcounted */
451#define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
452#define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
d4d03940 453
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454#define CopHINTHASH_get(c) ((COPHH*)((c)->cop_hints_hash))
455#define CopHINTHASH_set(c,h) ((c)->cop_hints_hash = (h))
456
457/*
458=head1 COP Hint Reading
459*/
460
461/*
462=for apidoc Am|SV *|cop_hints_fetch_pvn|const COP *cop|const char *keypv|STRLEN keylen|U32 hash|U32 flags
463
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464Look up the hint entry in the cop C<cop> with the key specified by
465C<keypv> and C<keylen>. If C<flags> has the C<COPHH_KEY_UTF8> bit set,
20439bc7 466the key octets are interpreted as UTF-8, otherwise they are interpreted
2d7f6611 467as Latin-1. C<hash> is a precomputed hash of the key string, or zero if
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468it has not been precomputed. Returns a mortal scalar copy of the value
469associated with the key, or C<&PL_sv_placeholder> if there is no value
470associated with the key.
471
472=cut
473*/
474
475#define cop_hints_fetch_pvn(cop, keypv, keylen, hash, flags) \
476 cophh_fetch_pvn(CopHINTHASH_get(cop), keypv, keylen, hash, flags)
477
478/*
479=for apidoc Am|SV *|cop_hints_fetch_pvs|const COP *cop|const char *key|U32 flags
480
481Like L</cop_hints_fetch_pvn>, but takes a literal string instead of a
482string/length pair, and no precomputed hash.
483
484=cut
485*/
486
487#define cop_hints_fetch_pvs(cop, key, flags) \
488 cophh_fetch_pvs(CopHINTHASH_get(cop), key, flags)
489
490/*
491=for apidoc Am|SV *|cop_hints_fetch_pv|const COP *cop|const char *key|U32 hash|U32 flags
492
493Like L</cop_hints_fetch_pvn>, but takes a nul-terminated string instead
494of a string/length pair.
495
496=cut
497*/
498
499#define cop_hints_fetch_pv(cop, key, hash, flags) \
500 cophh_fetch_pv(CopHINTHASH_get(cop), key, hash, flags)
501
502/*
503=for apidoc Am|SV *|cop_hints_fetch_sv|const COP *cop|SV *key|U32 hash|U32 flags
504
505Like L</cop_hints_fetch_pvn>, but takes a Perl scalar instead of a
506string/length pair.
507
508=cut
509*/
510
511#define cop_hints_fetch_sv(cop, key, hash, flags) \
512 cophh_fetch_sv(CopHINTHASH_get(cop), key, hash, flags)
513
514/*
515=for apidoc Am|HV *|cop_hints_2hv|const COP *cop|U32 flags
516
517Generates and returns a standard Perl hash representing the full set of
2d7f6611 518hint entries in the cop C<cop>. C<flags> is currently unused and must
20439bc7
Z
519be zero.
520
521=cut
522*/
523
524#define cop_hints_2hv(cop, flags) \
525 cophh_2hv(CopHINTHASH_get(cop), flags)
526
aebc0cbe 527#define CopLABEL(c) Perl_cop_fetch_label(aTHX_ (c), NULL, NULL)
5db1eb8d
BF
528#define CopLABEL_len(c,len) Perl_cop_fetch_label(aTHX_ (c), len, NULL)
529#define CopLABEL_len_flags(c,len,flags) Perl_cop_fetch_label(aTHX_ (c), len, flags)
dca6062a 530#define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
57843af0 531
ed094faf 532#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
cc49e20b 533#define CopLINE(c) ((c)->cop_line)
57843af0
GS
534#define CopLINE_inc(c) (++CopLINE(c))
535#define CopLINE_dec(c) (--CopLINE(c))
536#define CopLINE_set(c,l) (CopLINE(c) = (l))
cc49e20b 537
248c2a4d 538/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
e37778c2 539#define OutCopFILE(c) CopFILE(c)
248c2a4d 540
d5ec2987 541#define CopHINTS_get(c) ((c)->cop_hints + 0)
623e6609 542#define CopHINTS_set(c, h) STMT_START { \
d5ec2987 543 (c)->cop_hints = (h); \
623e6609
NC
544 } STMT_END
545
79072805
LW
546/*
547 * Here we have some enormously heavy (or at least ponderous) wizardry.
548 */
549
550/* subroutine context */
551struct block_sub {
f9c764c5 552 OP * retop; /* op to execute on exit from sub */
adcbf118 553 /* Above here is the same for sub, format and eval. */
9aa350eb 554 PAD *prevcomppad; /* the caller's PL_comppad */
8e663997 555 CV * cv;
f9c764c5 556 /* Above here is the same for sub and format. */
bb172083 557 I32 olddepth;
3073d04f 558 AV *savearray;
f9c764c5
NC
559};
560
561
562/* format context */
563struct block_format {
f39bc417 564 OP * retop; /* op to execute on exit from sub */
adcbf118 565 /* Above here is the same for sub, format and eval. */
9aa350eb 566 PAD *prevcomppad; /* the caller's PL_comppad */
8e663997 567 CV * cv;
f9c764c5
NC
568 /* Above here is the same for sub and format. */
569 GV * gv;
570 GV * dfoutgv;
79072805
LW
571};
572
dfe0f39b
DM
573/* free all savestack items back to the watermark of the specified context */
574
e992140c 575#define CX_LEAVE_SCOPE(cx) LEAVE_SCOPE(cx->blk_oldsaveix)
dfe0f39b 576
5da525e9
DM
577#ifdef DEBUGGING
578/* on debugging builds, poison cx afterwards so we know no code
579 * uses it - because after doing cxstack_ix--, any ties, exceptions etc
580 * may overwrite the current stack frame */
581# define CX_POP(cx) \
582 assert(&cxstack[cxstack_ix] == cx); \
583 cxstack_ix--; \
584 cx = NULL;
585#else
586# define CX_POP(cx) cxstack_ix--;
587#endif
588
589
b36bdeca 590/* base for the next two macros. Don't use directly.
d6911e1b
DM
591 * The context frame holds a reference to the CV so that it can't be
592 * freed while we're executing it */
b36bdeca 593
ee98a1d6 594#define PUSHSUB_BASE(cx) \
88dbe4af
FC
595 ENTRY_PROBE(CvNAMED(cv) \
596 ? HEK_KEY(CvNAME_HEK(cv)) \
597 : GvENAME(CvGV(cv)), \
c6903450 598 CopFILE((const COP *)CvSTART(cv)), \
3e2413e5
DL
599 CopLINE((const COP *)CvSTART(cv)), \
600 CopSTASHPV((const COP *)CvSTART(cv))); \
5ac1e9b2 601 \
79072805 602 cx->blk_sub.cv = cv; \
b8f55b69 603 cx->blk_sub.olddepth = CvDEPTH(cv); \
3b21fb5d 604 cx->blk_sub.prevcomppad = PL_comppad; \
ae423868 605 cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \
5f66b61c 606 cx->blk_sub.retop = NULL; \
94a11f7c 607 SvREFCNT_inc_simple_void_NN(cv);
b36bdeca 608
4587c532 609#define PUSHSUB_GET_LVALUE_MASK(func) \
777d9014
FC
610 /* If the context is indeterminate, then only the lvalue */ \
611 /* flags that the caller also has are applicable. */ \
4587c532 612 ( \
777d9014
FC
613 (PL_op->op_flags & OPf_WANT) \
614 ? OPpENTERSUB_LVAL_MASK \
615 : !(PL_op->op_private & OPpENTERSUB_LVAL_MASK) \
4587c532
FC
616 ? 0 : (U8)func(aTHX) \
617 )
618
619#define PUSHSUB(cx) \
620 { \
621 U8 phlags = PUSHSUB_GET_LVALUE_MASK(Perl_was_lvalue_sub); \
ee98a1d6 622 PUSHSUB_BASE(cx) \
446d0787 623 cx->blk_u16 = PL_op->op_private & \
0e9700df 624 (phlags|OPpDEREF); \
777d9014 625 }
79072805 626
ee98a1d6
DM
627/* variant for use by OP_DBSTATE, where op_private holds hint bits */
628#define PUSHSUB_DB(cx) \
629 PUSHSUB_BASE(cx) \
446d0787 630 cx->blk_u16 = 0;
ee98a1d6
DM
631
632
10067d9a 633#define PUSHFORMAT(cx, retop) \
f9c764c5
NC
634 cx->blk_format.cv = cv; \
635 cx->blk_format.gv = gv; \
636 cx->blk_format.retop = (retop); \
f9c764c5 637 cx->blk_format.dfoutgv = PL_defoutgv; \
3b21fb5d 638 cx->blk_format.prevcomppad = PL_comppad; \
1956db7e 639 cx->blk_u16 = 0; \
e992140c 640 cx->blk_oldsaveix = PL_savestack_ix; \
2c50b7ed 641 SvREFCNT_inc_simple_void_NN(cv); \
f32c7e86 642 CvDEPTH(cv)++; \
f9c764c5 643 SvREFCNT_inc_void(cx->blk_format.dfoutgv)
79072805 644
fad386cb 645/* Restore old @_ */
3db8f154 646#define POP_SAVEARRAY() \
6d4ff0d2 647 STMT_START { \
fad386cb 648 AV *av = GvAV(PL_defgv); \
a8bba7fa 649 GvAV(PL_defgv) = cx->blk_sub.savearray; \
656457d0 650 cx->blk_sub.savearray = NULL; \
fad386cb 651 SvREFCNT_dec(av); \
6d4ff0d2 652 } STMT_END
6d4ff0d2 653
ecf8e9dd 654/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
8e09340b
GS
655 * leave any (a fast av_clear(ary), basically) */
656#define CLEAR_ARGARRAY(ary) \
657 STMT_START { \
658 AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
9c6bc640 659 AvARRAY(ary) = AvALLOC(ary); \
8e09340b
GS
660 AvFILLp(ary) = -1; \
661 } STMT_END
7766f137 662
7e27c4a5
DM
663
664/* subsets of POPSUB */
665
666#define POPSUB_COMMON(cx) \
656457d0
DM
667 STMT_START { \
668 CV *cv; \
669 PL_comppad = cx->blk_sub.prevcomppad; \
670 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
671 cv = cx->blk_sub.cv; \
672 CvDEPTH(cv) = cx->blk_sub.olddepth; \
673 cx->blk_sub.cv = NULL; \
674 SvREFCNT_dec(cv); \
675 } STMT_END
7e27c4a5 676
04e686b8
DM
677/* handle the @_ part of leaving a sub */
678
679#define POPSUB_ARGS(cx) \
680 STMT_START { \
681 AV *av; \
682 assert(AvARRAY(MUTABLE_AV( \
683 PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ \
684 CvDEPTH(cx->blk_sub.cv)])) == PL_curpad); \
685 POP_SAVEARRAY(); \
686 /* abandon @_ if it got reified */ \
687 av = MUTABLE_AV(PAD_SVl(0)); \
688 if (UNLIKELY(AvREAL(av))) \
689 clear_defarray(av, 0); \
690 else { \
691 CLEAR_ARGARRAY(av); \
692 } \
693 } STMT_END
7e27c4a5 694
88c90157 695#define POPSUB(cx) \
b0d9ce38 696 STMT_START { \
88dbe4af
FC
697 RETURN_PROBE(CvNAMED(cx->blk_sub.cv) \
698 ? HEK_KEY(CvNAME_HEK(cx->blk_sub.cv)) \
699 : GvENAME(CvGV(cx->blk_sub.cv)), \
8f629a87 700 CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
3e2413e5
DL
701 CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
702 CopSTASHPV((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
5ac1e9b2 703 \
bafb2adc 704 if (CxHASARGS(cx)) { \
04e686b8 705 POPSUB_ARGS(cx); \
79072805 706 } \
7e27c4a5 707 POPSUB_COMMON(cx); \
b0d9ce38 708 } STMT_END
79072805
LW
709
710#define POPFORMAT(cx) \
25375124 711 STMT_START { \
656457d0
DM
712 CV *cv; \
713 GV * const dfout = cx->blk_format.dfoutgv; \
714 setdefout(dfout); \
715 cx->blk_format.dfoutgv = NULL; \
716 SvREFCNT_dec_NN(dfout); /* the cx->defoutgv ref */ \
3b21fb5d
DM
717 PL_comppad = cx->blk_format.prevcomppad; \
718 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
656457d0
DM
719 cv = cx->blk_format.cv; \
720 cx->blk_format.cv = NULL;; \
2c50b7ed 721 --CvDEPTH(cv); \
656457d0 722 SvREFCNT_dec_NN(cv); \
25375124 723 } STMT_END
79072805
LW
724
725/* eval context */
726struct block_eval {
8e663997
NC
727 OP * retop; /* op to execute on exit from eval */
728 /* Above here is the same for sub, format and eval. */
0f79a09d 729 SV * old_namesv;
79072805 730 OP * old_eval_root;
748a9306 731 SV * cur_text;
2090ab20 732 CV * cv;
abd70938 733 JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
79072805
LW
734};
735
17347a51
NC
736/* If we ever need more than 512 op types, change the shift from 7.
737 blku_gimme is actually also only 2 bits, so could be merged with something.
738*/
739
740#define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F)
741#define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7)
85a64632 742
6b75f042 743#define PUSHEVAL(cx,n) \
0f79a09d 744 STMT_START { \
17347a51
NC
745 assert(!(PL_in_eval & ~0x7F)); \
746 assert(!(PL_op->op_type & ~0x1FF)); \
747 cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \
a0714e2c 748 cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
a8bba7fa 749 cx->blk_eval.old_eval_root = PL_eval_root; \
bdc0bf6f 750 cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
9aba0c93 751 cx->blk_eval.cv = NULL; /* set by doeval_compile() as applicable */ \
5f66b61c 752 cx->blk_eval.retop = NULL; \
abd70938 753 cx->blk_eval.cur_top_env = PL_top_env; \
0f79a09d 754 } STMT_END
79072805
LW
755
756#define POPEVAL(cx) \
0f79a09d 757 STMT_START { \
f09cca8c 758 SV *sv; \
85a64632 759 PL_in_eval = CxOLD_IN_EVAL(cx); \
7766f137 760 PL_eval_root = cx->blk_eval.old_eval_root; \
f09cca8c
DM
761 sv = cx->blk_eval.cur_text; \
762 if (sv && SvSCREAM(sv)) { \
763 cx->blk_eval.cur_text = NULL; \
764 SvREFCNT_dec_NN(sv); \
765 } \
766 sv = cx->blk_eval.old_namesv; \
767 if (sv && !SvTEMP(sv))/* TEMP => POPEVAL re-entrantly called */ \
768 sv_2mortal(sv); \
0f79a09d 769 } STMT_END
79072805
LW
770
771/* loop context */
772struct block_loop {
022eaa24 773 LOOP * my_op; /* My op, that contains redo, next and last ops. */
df530c37 774 union { /* different ways of locating the iteration variable */
b52de964
DM
775 SV **svp; /* for lexicals: address of pad slot */
776 GV *gv; /* for package vars */
df530c37 777 } itervar_u;
f0bb9bf7 778 SV *itersave; /* the original iteration var */
493b0a3c 779 union {
93661e56
DM
780 struct { /* CXt_LOOP_ARY, C<for (@ary)> */
781 AV *ary; /* array being iterated over */
782 IV ix; /* index relative to base of array */
d01136d6 783 } ary;
93661e56
DM
784 struct { /* CXt_LOOP_LIST, C<for (list)> */
785 I32 basesp; /* first element of list on stack */
786 IV ix; /* index relative to basesp */
787 } stack;
788 struct { /* CXt_LOOP_LAZYIV, C<for (1..9)> */
d01136d6
BS
789 IV cur;
790 IV end;
791 } lazyiv;
93661e56 792 struct { /* CXt_LOOP_LAZYSV C<for ('a'..'z')> */
d01136d6
BS
793 SV * cur;
794 SV * end; /* maxiumum value (or minimum in reverse) */
795 } lazysv;
796 } state_u;
7766f137 797#ifdef USE_ITHREADS
b52de964 798 PAD *oldcomppad; /* needed to map itervar_u.svp during thread clone */
f83b46a0 799#endif
b52de964 800};
f83b46a0 801
9af0df0b
DM
802#define CxITERVAR(c) \
803 (CxPADLOOP(c) \
804 ? (c)->blk_loop.itervar_u.svp \
805 : ((c)->cx_type & CXp_FOR_GV) \
806 ? &GvSV((c)->blk_loop.itervar_u.gv) \
807 : (SV **)&(c)->blk_loop.itervar_u.gv)
f83b46a0 808
b1cf8b36 809#define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop))
5db1eb8d
BF
810#define CxLABEL_len(c,len) (0 + CopLABEL_len((c)->blk_oldcop, len))
811#define CxLABEL_len_flags(c,len,flags) (0 + CopLABEL_len_flags((c)->blk_oldcop, len, flags))
ae423868 812#define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
1956db7e 813#define CxLVAL(c) (0 + ((c)->blk_u16 & 0xff))
1956db7e 814
7766f137 815
1bef65a2 816#define PUSHLOOP_PLAIN(cx) \
3b719c58 817 cx->blk_loop.my_op = cLOOP; \
e992140c 818 cx->blk_oldsaveix = PL_savestack_ix;
3b719c58 819
b52de964
DM
820#ifdef USE_ITHREADS
821# define PUSHLOOP_FOR_setpad(c) (c)->blk_loop.oldcomppad = PL_comppad
822#else
823# define PUSHLOOP_FOR_setpad(c) NOOP
824#endif
825
1bef65a2 826#define PUSHLOOP_FOR(cx, ivar, isave) \
022eaa24 827 cx->blk_loop.my_op = cLOOP; \
b52de964 828 cx->blk_loop.itervar_u.svp = (SV**)(ivar); \
e992140c 829 cx->blk_oldsaveix = PL_savestack_ix; \
f0bb9bf7 830 cx->blk_loop.itersave = isave; \
b52de964 831 PUSHLOOP_FOR_setpad(cx);
79072805
LW
832
833#define POPLOOP(cx) \
d01136d6 834 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \
a7db2e35
DM
835 SV *sv = cx->blk_loop.state_u.lazysv.cur; \
836 cx->blk_loop.state_u.lazysv.cur = NULL; \
837 SvREFCNT_dec_NN(sv); \
838 sv = cx->blk_loop.state_u.lazysv.end; \
839 cx->blk_loop.state_u.lazysv.end = NULL; \
840 SvREFCNT_dec_NN(sv); \
d01136d6 841 } \
a7db2e35
DM
842 else if (CxTYPE(cx) == CXt_LOOP_ARY) { \
843 AV *av = cx->blk_loop.state_u.ary.ary; \
844 cx->blk_loop.state_u.ary.ary = NULL; \
845 SvREFCNT_dec(av); \
846 } \
9af0df0b 847 if (cx->cx_type & (CXp_FOR_PAD|CXp_FOR_GV)) { \
f0bb9bf7 848 SV *cursv; \
d4e2b4d6
DM
849 SV **svp = (cx)->blk_loop.itervar_u.svp; \
850 if ((cx->cx_type & CXp_FOR_GV)) \
f0bb9bf7 851 svp = &GvSV((GV*)svp); \
d4e2b4d6
DM
852 cursv = *svp; \
853 *svp = cx->blk_loop.itersave; \
a7db2e35 854 cx->blk_loop.itersave = NULL; \
385bbb12 855 SvREFCNT_dec(cursv); \
b042e328 856 }
79072805 857
0d863452
RH
858/* given/when context */
859struct block_givwhen {
860 OP *leave_op;
b95eccd3 861 SV *defsv_save; /* the original $_ */
0d863452
RH
862};
863
b95eccd3 864#define PUSHWHEN(cx) \
e992140c 865 cx->blk_oldsaveix = PL_savestack_ix; \
0d863452
RH
866 cx->blk_givwhen.leave_op = cLOGOP->op_other;
867
b95eccd3
DM
868#define PUSHGIVEN(cx, orig_var) \
869 PUSHWHEN(cx); \
870 cx->blk_givwhen.defsv_save = orig_var;
871
872#define POPWHEN(cx) \
2f450c1b 873 NOOP;
b95eccd3
DM
874
875#define POPGIVEN(cx) \
33e0807a
DM
876 STMT_START { \
877 SV *sv = GvSV(PL_defgv); \
878 GvSV(PL_defgv) = cx->blk_givwhen.defsv_save; \
879 cx->blk_givwhen.defsv_save = NULL; \
880 SvREFCNT_dec(sv); \
881 } STMT_END
b95eccd3 882
0d863452 883
c5369ccc
DM
884/* basic block, i.e. pp_enter/leave */
885
dfe0f39b 886#define PUSHBASICBLK(cx) \
e992140c 887 cx->blk_oldsaveix = PL_savestack_ix;
c5369ccc 888
dfe0f39b 889#define POPBASICBLK(cx) \
2f450c1b 890 NOOP;
c5369ccc
DM
891
892
79072805
LW
893/* context common to subroutines, evals and loops */
894struct block {
446d0787 895 U8 blku_type; /* what kind of context this is */
2e0df0e8 896 U8 blku_gimme; /* is this block running in list context? */
17347a51 897 U16 blku_u16; /* used by block_sub and block_eval (so far) */
e992140c
DM
898 I32 blku_oldsaveix; /* saved PL_savestack_ix */
899 /* all the fields above must be aligned with same-sized fields as sbu */
1bef65a2 900 I32 blku_oldsp; /* current sp floor: where nextstate pops to */
79072805 901 I32 blku_oldmarksp; /* mark stack index */
f284fecd 902 COP * blku_oldcop; /* old curcop pointer */
79072805 903 PMOP * blku_oldpm; /* values of pattern match vars */
bb3300d1 904 SSize_t blku_old_tmpsfloor; /* saved PL_tmps_floor */
f284fecd 905 I32 blku_oldscopesp; /* scope stack index */
79072805
LW
906
907 union {
908 struct block_sub blku_sub;
f9c764c5 909 struct block_format blku_format;
79072805
LW
910 struct block_eval blku_eval;
911 struct block_loop blku_loop;
0d863452 912 struct block_givwhen blku_givwhen;
79072805
LW
913 } blk_u;
914};
915#define blk_oldsp cx_u.cx_blk.blku_oldsp
916#define blk_oldcop cx_u.cx_blk.blku_oldcop
79072805
LW
917#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
918#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
919#define blk_oldpm cx_u.cx_blk.blku_oldpm
920#define blk_gimme cx_u.cx_blk.blku_gimme
446d0787 921#define blk_u16 cx_u.cx_blk.blku_u16
e992140c 922#define blk_oldsaveix cx_u.cx_blk.blku_oldsaveix
79072805 923#define blk_sub cx_u.cx_blk.blk_u.blku_sub
f9c764c5 924#define blk_format cx_u.cx_blk.blk_u.blku_format
79072805
LW
925#define blk_eval cx_u.cx_blk.blk_u.blku_eval
926#define blk_loop cx_u.cx_blk.blk_u.blku_loop
0d863452 927#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
79072805 928
1c98cc53 929#define DEBUG_CX(action) \
d9f81b50 930 DEBUG_l( \
bb3300d1 931 Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) (save %ld,%ld) at %s:%d\n",\
1c98cc53
DM
932 (long)cxstack_ix, \
933 action, \
934 PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \
935 (long)PL_scopestack_ix, \
936 (long)(cxstack[cxstack_ix].blk_oldscopesp), \
bb3300d1 937 (long)PL_savestack_ix, \
e992140c 938 (long)(cxstack[cxstack_ix].blk_oldsaveix), \
d9f81b50 939 __FILE__, __LINE__));
1c98cc53 940
79072805 941/* Enter a block. */
8990e307 942#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
79072805 943 cx->cx_type = t, \
3280af22
NIS
944 cx->blk_oldsp = sp - PL_stack_base, \
945 cx->blk_oldcop = PL_curcop, \
1aff0e91 946 cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
3280af22 947 cx->blk_oldscopesp = PL_scopestack_ix, \
3280af22 948 cx->blk_oldpm = PL_curpm, \
eb160463 949 cx->blk_gimme = (U8)gimme; \
94a11f7c
DM
950 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
951 PL_tmps_floor = PL_tmps_ix; \
1c98cc53 952 DEBUG_CX("PUSH");
79072805
LW
953
954/* Exit a block (RETURN and LAST). */
dd748f45 955#define POPBLOCK(cx) \
1c98cc53 956 DEBUG_CX("POP"); \
3280af22
NIS
957 PL_curcop = cx->blk_oldcop, \
958 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
959 PL_scopestack_ix = cx->blk_oldscopesp, \
72c5b62d
DM
960 /* LEAVE_SCOPE() should have made this true. /(?{})/ cheats
961 * and leaves a CX entry lying around for repeated use, so
962 * skip for multicall */ \
8e7e33ef 963 assert( (CxTYPE(cx) == CXt_SUB && CxMULTICALL(cx)) \
e992140c 964 || PL_savestack_ix == cx->blk_oldsaveix); \
b042e328 965 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
dd748f45 966 PL_curpm = cx->blk_oldpm;
79072805
LW
967
968/* Continue a block elsewhere (NEXT and REDO). */
1c98cc53
DM
969#define TOPBLOCK(cx) \
970 DEBUG_CX("TOP"); \
971 cx = &cxstack[cxstack_ix], \
1aff0e91 972 PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
973 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
974 PL_scopestack_ix = cx->blk_oldscopesp, \
1c98cc53 975 PL_curpm = cx->blk_oldpm;
79072805
LW
976
977/* substitution context */
978struct subst {
e992140c 979 U8 sbu_type; /* same as blku_type */
1ed74d04 980 U8 sbu_rflags;
e992140c
DM
981 U16 sbu_rxtainted;
982 I32 sbu_oldsaveix; /* same as blku_oldsaveix */
983 /* all the fields above must be aligned with same-sized fields as blku * */
3c6ef0a5
FC
984 SSize_t sbu_iters;
985 SSize_t sbu_maxiters;
79072805
LW
986 char * sbu_orig;
987 SV * sbu_dstr;
988 SV * sbu_targ;
989 char * sbu_s;
990 char * sbu_m;
991 char * sbu_strend;
c90c0ff4 992 void * sbu_rxres;
c07a80fd 993 REGEXP * sbu_rx;
79072805
LW
994};
995#define sb_iters cx_u.cx_subst.sbu_iters
996#define sb_maxiters cx_u.cx_subst.sbu_maxiters
22e551b9 997#define sb_rflags cx_u.cx_subst.sbu_rflags
71be2cbc 998#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
79072805
LW
999#define sb_orig cx_u.cx_subst.sbu_orig
1000#define sb_dstr cx_u.cx_subst.sbu_dstr
1001#define sb_targ cx_u.cx_subst.sbu_targ
1002#define sb_s cx_u.cx_subst.sbu_s
1003#define sb_m cx_u.cx_subst.sbu_m
1004#define sb_strend cx_u.cx_subst.sbu_strend
c90c0ff4 1005#define sb_rxres cx_u.cx_subst.sbu_rxres
c07a80fd 1006#define sb_rx cx_u.cx_subst.sbu_rx
79072805 1007
9c105995
NC
1008#ifdef PERL_CORE
1009# define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
e992140c 1010 cx->blk_oldsaveix = oldsave, \
79072805
LW
1011 cx->sb_iters = iters, \
1012 cx->sb_maxiters = maxiters, \
22e551b9 1013 cx->sb_rflags = r_flags, \
71be2cbc 1014 cx->sb_rxtainted = rxtainted, \
79072805
LW
1015 cx->sb_orig = orig, \
1016 cx->sb_dstr = dstr, \
1017 cx->sb_targ = targ, \
1018 cx->sb_s = s, \
1019 cx->sb_m = m, \
1020 cx->sb_strend = strend, \
4608196e 1021 cx->sb_rxres = NULL, \
c07a80fd 1022 cx->sb_rx = rx, \
1ed74d04 1023 cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \
e22ae1e2 1024 rxres_save(&cx->sb_rxres, rx); \
cf69025f
TC
1025 (void)ReREFCNT_inc(rx); \
1026 SvREFCNT_inc_void_NN(targ)
79072805 1027
80d88db0 1028# define POPSUBST(cx) \
77189b8c
DM
1029 STMT_START { \
1030 REGEXP *re; \
e22ae1e2 1031 rxres_free(&cx->sb_rxres); \
77189b8c
DM
1032 re = cx->sb_rx; \
1033 cx->sb_rx = NULL; \
1034 ReREFCNT_dec(re); \
1035 SvREFCNT_dec_NN(cx->sb_targ); \
1036 } STMT_END
9c105995
NC
1037#endif
1038
1039#define CxONCE(cx) ((cx)->cx_type & CXp_ONCE)
79072805
LW
1040
1041struct context {
79072805
LW
1042 union {
1043 struct block cx_blk;
1044 struct subst cx_subst;
1045 } cx_u;
1046};
2e0df0e8 1047#define cx_type cx_u.cx_subst.sbu_type
6b35e009 1048
76753e7f
NC
1049/* If you re-order these, there is also an array of uppercase names in perl.h
1050 and a static array of context names in pp_ctl.c */
3701055e 1051#define CXTYPEMASK 0xf
79646418 1052#define CXt_NULL 0 /* currently only used for sort BLOCK */
76753e7f
NC
1053#define CXt_WHEN 1
1054#define CXt_BLOCK 2
1055/* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a
1056 jump table in pp_ctl.c
1057 The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c
1058*/
1059#define CXt_GIVEN 3
93661e56
DM
1060
1061/* be careful of the ordering of these five. Macros like CxTYPE_is_LOOP,
1062 * CxFOREACH compare ranges */
1063#define CXt_LOOP_PLAIN 4 /* {} */
1064#define CXt_LOOP_LAZYIV 5 /* for (1..9) {} */
1065#define CXt_LOOP_LAZYSV 6 /* for ('a'..'z') {} */
1066#define CXt_LOOP_LIST 7 /* for (1,2,3) {} */
1067#define CXt_LOOP_ARY 8 /* for (@ary) {} */
1068
1069#define CXt_SUB 9
1070#define CXt_FORMAT 10
1071#define CXt_EVAL 11
1072#define CXt_SUBST 12
76753e7f 1073/* SUBST doesn't feature in all switch statements. */
79072805 1074
ae423868 1075/* private flags for CXt_SUB and CXt_FORMAT */
79646418
DM
1076#define CXp_MULTICALL 0x10 /* part of a multicall (so don't tear down
1077 context on exit). (not CXt_FORMAT) */
1f27d788 1078#define CXp_HASARGS 0x20
b0065247
DM
1079#define CXp_SUB_RE 0x40 /* code called within regex, i.e. (?{}) */
1080#define CXp_SUB_RE_FAKE 0x80 /* fake sub CX for (?{}) in current scope */
ae423868 1081
6b35e009 1082/* private flags for CXt_EVAL */
1f27d788
NC
1083#define CXp_REAL 0x20 /* truly eval'', not a lookalike */
1084#define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */
6b35e009 1085
7766f137 1086/* private flags for CXt_LOOP */
1f27d788 1087#define CXp_FOR_DEF 0x10 /* foreach using $_ */
d39c26a6 1088#define CXp_FOR_LVREF 0x20 /* foreach using \$var */
9af0df0b
DM
1089#define CXp_FOR_GV 0x40 /* foreach using package var */
1090#define CXp_FOR_PAD 0x80 /* foreach using lexical var */
1091#define CxPADLOOP(c) ((c)->cx_type & CXp_FOR_PAD)
e846cb92 1092
1ed74d04
NC
1093/* private flags for CXt_SUBST */
1094#define CXp_ONCE 0x10 /* What was sbu_once in struct subst */
7766f137 1095
6b35e009 1096#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
93661e56
DM
1097#define CxTYPE_is_LOOP(c) ( CxTYPE(cx) >= CXt_LOOP_PLAIN \
1098 && CxTYPE(cx) <= CXt_LOOP_ARY)
79646418 1099#define CxMULTICALL(c) ((c)->cx_type & CXp_MULTICALL)
0588a150 1100#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
7766f137 1101 == (CXt_EVAL|CXp_REAL))
0588a150 1102#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
1d76a5c3 1103 == (CXt_EVAL|CXp_TRYBLOCK))
93661e56
DM
1104#define CxFOREACH(c) ( CxTYPE(cx) >= CXt_LOOP_LAZYSV \
1105 && CxTYPE(cx) <= CXt_LOOP_ARY)
6b35e009 1106
109bf713 1107#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
79072805 1108
ccfc67b7
JH
1109/*
1110=head1 "Gimme" Values
1111*/
954c1994
GS
1112
1113/*
1114=for apidoc AmU||G_SCALAR
fbe13c60 1115Used to indicate scalar context. See C<L</GIMME_V>>, C<L</GIMME>>, and
954c1994
GS
1116L<perlcall>.
1117
1118=for apidoc AmU||G_ARRAY
fbe13c60 1119Used to indicate list context. See C<L</GIMME_V>>, C<L</GIMME>> and
954c1994
GS
1120L<perlcall>.
1121
1122=for apidoc AmU||G_VOID
fbe13c60 1123Used to indicate void context. See C<L</GIMME_V>> and L<perlcall>.
954c1994
GS
1124
1125=for apidoc AmU||G_DISCARD
1126Indicates that arguments returned from a callback should be discarded. See
1127L<perlcall>.
1128
1129=for apidoc AmU||G_EVAL
1130
1131Used to force a Perl C<eval> wrapper around a callback. See
1132L<perlcall>.
1133
1134=for apidoc AmU||G_NOARGS
1135
1136Indicates that no arguments are being sent to a callback. See
1137L<perlcall>.
1138
1139=cut
1140*/
1141
2f8edad0
NC
1142#define G_SCALAR 2
1143#define G_ARRAY 3
1144#define G_VOID 1
1145#define G_WANT 3
79072805 1146
864dbfa3 1147/* extra flags for Perl_call_* routines */
2f8edad0 1148#define G_DISCARD 4 /* Call FREETMPS.
b54b4831
NC
1149 Don't change this without consulting the
1150 hash actions codes defined in hv.h */
2f8edad0
NC
1151#define G_EVAL 8 /* Assume eval {} around subroutine call. */
1152#define G_NOARGS 16 /* Don't construct a @_ array. */
7ce09284 1153#define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */
2f8edad0
NC
1154#define G_NODEBUG 64 /* Disable debugging at toplevel. */
1155#define G_METHOD 128 /* Calling method. */
c40f1585 1156#define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
edb2152a 1157 fold_constants. */
67549bd2
NC
1158#define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef
1159 A special case for UNSHIFT in
1160 Perl_magic_methcall(). */
d1d7a15d
NC
1161#define G_WRITING_TO_STDERR 1024 /* Perl_write_to_stderr() is calling
1162 Perl_magic_methcall(). */
a1941760 1163#define G_RE_REPARSING 0x800 /* compiling a run-time /(?{..})/ */
c106c2be 1164#define G_METHOD_NAMED 4096 /* calling named method, eg without :: or ' */
e336de0d 1165
faef0170
HS
1166/* flag bits for PL_in_eval */
1167#define EVAL_NULL 0 /* not in an eval */
1168#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
1169#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
864dbfa3 1170#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
6dc8a9e4 1171#define EVAL_INREQUIRE 8 /* The code is being required. */
a1941760 1172#define EVAL_RE_REPARSING 0x10 /* eval_sv() called with G_RE_REPARSING */
faef0170 1173
e336de0d
GS
1174/* Support for switching (stack and block) contexts.
1175 * This ensures magic doesn't invalidate local stack and cx pointers.
1176 */
1177
e788e7d3
GS
1178#define PERLSI_UNKNOWN -1
1179#define PERLSI_UNDEF 0
1180#define PERLSI_MAIN 1
1181#define PERLSI_MAGIC 2
1182#define PERLSI_SORT 3
1183#define PERLSI_SIGNAL 4
1184#define PERLSI_OVERLOAD 5
1185#define PERLSI_DESTROY 6
1186#define PERLSI_WARNHOOK 7
1187#define PERLSI_DIEHOOK 8
1188#define PERLSI_REQUIRE 9
e1a10f35 1189#define PERLSI_MULTICALL 10
e336de0d
GS
1190
1191struct stackinfo {
1192 AV * si_stack; /* stack for current runlevel */
1193 PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
9bd87817
NC
1194 struct stackinfo * si_prev;
1195 struct stackinfo * si_next;
e336de0d
GS
1196 I32 si_cxix; /* current context index */
1197 I32 si_cxmax; /* maximum allocated index */
1198 I32 si_type; /* type of runlevel */
ce2f7c3b 1199 I32 si_markoff; /* offset where markstack begins for us.
e336de0d
GS
1200 * currently used only with DEBUGGING,
1201 * but not #ifdef-ed for bincompat */
1202};
1203
1204typedef struct stackinfo PERL_SI;
1205
3280af22
NIS
1206#define cxstack (PL_curstackinfo->si_cxstack)
1207#define cxstack_ix (PL_curstackinfo->si_cxix)
1208#define cxstack_max (PL_curstackinfo->si_cxmax)
e336de0d
GS
1209
1210#ifdef DEBUGGING
ce2f7c3b
GS
1211# define SET_MARK_OFFSET \
1212 PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
e336de0d 1213#else
ce2f7c3b 1214# define SET_MARK_OFFSET NOOP
e336de0d
GS
1215#endif
1216
d3acc0f7 1217#define PUSHSTACKi(type) \
e336de0d 1218 STMT_START { \
3280af22 1219 PERL_SI *next = PL_curstackinfo->si_next; \
1c98cc53
DM
1220 DEBUG_l({ \
1221 int i = 0; PERL_SI *p = PL_curstackinfo; \
1222 while (p) { i++; p = p->si_prev; } \
1223 Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \
1224 i, __FILE__, __LINE__);}) \
e336de0d
GS
1225 if (!next) { \
1226 next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
3280af22
NIS
1227 next->si_prev = PL_curstackinfo; \
1228 PL_curstackinfo->si_next = next; \
e336de0d
GS
1229 } \
1230 next->si_type = type; \
1231 next->si_cxix = -1; \
1232 AvFILLp(next->si_stack) = 0; \
3280af22
NIS
1233 SWITCHSTACK(PL_curstack,next->si_stack); \
1234 PL_curstackinfo = next; \
ce2f7c3b 1235 SET_MARK_OFFSET; \
e336de0d
GS
1236 } STMT_END
1237
e788e7d3 1238#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
d3acc0f7 1239
3095d977
GS
1240/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
1241 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
d3acc0f7 1242#define POPSTACK \
e336de0d 1243 STMT_START { \
39644a26 1244 dSP; \
c4420975 1245 PERL_SI * const prev = PL_curstackinfo->si_prev; \
1c98cc53
DM
1246 DEBUG_l({ \
1247 int i = -1; PERL_SI *p = PL_curstackinfo; \
1248 while (p) { i++; p = p->si_prev; } \
1249 Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \
1250 i, __FILE__, __LINE__);}) \
e336de0d 1251 if (!prev) { \
3d04513d 1252 Perl_croak_popstack(); \
e336de0d 1253 } \
3280af22 1254 SWITCHSTACK(PL_curstack,prev->si_stack); \
e336de0d 1255 /* don't free prev here, free them all at the END{} */ \
3280af22 1256 PL_curstackinfo = prev; \
e336de0d
GS
1257 } STMT_END
1258
1259#define POPSTACK_TO(s) \
1260 STMT_START { \
3280af22 1261 while (PL_curstack != s) { \
bac4b2ad 1262 dounwind(-1); \
d3acc0f7 1263 POPSTACK; \
bac4b2ad 1264 } \
e336de0d 1265 } STMT_END
923e4eb5
JH
1266
1267#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
1268#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
1269
9850bf21
RH
1270/*
1271=head1 Multicall Functions
1272
1273=for apidoc Ams||dMULTICALL
72d33970 1274Declare local variables for a multicall. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1275
1276=for apidoc Ams||PUSH_MULTICALL
1277Opening bracket for a lightweight callback.
0eda4409 1278See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1279
1280=for apidoc Ams||MULTICALL
72d33970 1281Make a lightweight callback. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1282
1283=for apidoc Ams||POP_MULTICALL
1284Closing bracket for a lightweight callback.
0eda4409 1285See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1286
1287=cut
1288*/
1289
1290#define dMULTICALL \
1291 SV **newsp; /* set by POPBLOCK */ \
1292 PERL_CONTEXT *cx; \
82f35e8b 1293 CV *multicall_cv; \
9850bf21
RH
1294 OP *multicall_cop; \
1295 bool multicall_oldcatch; \
1296 U8 hasargs = 0 /* used by PUSHSUB */
1297
82f35e8b 1298#define PUSH_MULTICALL(the_cv) \
b0065247 1299 PUSH_MULTICALL_FLAGS(the_cv, 0)
81ed78b2 1300
b0065247
DM
1301/* Like PUSH_MULTICALL, but allows you to specify extra flags
1302 * for the CX stack entry (this isn't part of the public API) */
81ed78b2 1303
b0065247 1304#define PUSH_MULTICALL_FLAGS(the_cv, flags) \
9850bf21 1305 STMT_START { \
0bcc34c2
AL
1306 CV * const _nOnclAshIngNamE_ = the_cv; \
1307 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1308 PADLIST * const padlist = CvPADLIST(cv); \
9850bf21 1309 multicall_oldcatch = CATCH_GET; \
9850bf21 1310 CATCH_SET(TRUE); \
e1a10f35 1311 PUSHSTACKi(PERLSI_MULTICALL); \
b0065247 1312 PUSHBLOCK(cx, (CXt_SUB|CXp_MULTICALL|flags), PL_stack_sp); \
9850bf21 1313 PUSHSUB(cx); \
e992140c 1314 cx->blk_oldsaveix = PL_savestack_ix; \
8ae997c5 1315 SAVEVPTR(PL_op); \
b0065247
DM
1316 if (!(flags & CXp_SUB_RE_FAKE)) \
1317 CvDEPTH(cv)++; \
81ed78b2 1318 if (CvDEPTH(cv) >= 2) { \
9850bf21
RH
1319 PERL_STACK_OVERFLOW_CHECK(); \
1320 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1321 } \
9850bf21 1322 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
82f35e8b 1323 multicall_cv = cv; \
7e27c4a5 1324 PERL_UNUSED_VAR(multicall_cv); /* for API */ \
9850bf21
RH
1325 multicall_cop = CvSTART(cv); \
1326 } STMT_END
1327
1328#define MULTICALL \
1329 STMT_START { \
1330 PL_op = multicall_cop; \
1331 CALLRUNOPS(aTHX); \
1332 } STMT_END
1333
1334#define POP_MULTICALL \
1335 STMT_START { \
3d26b81e 1336 cx = &cxstack[cxstack_ix]; \
dfe0f39b 1337 CX_LEAVE_SCOPE(cx); \
7e27c4a5 1338 POPSUB_COMMON(cx); \
4df352a8
DM
1339 newsp = PL_stack_base + cx->blk_oldsp; \
1340 gimme = cx->blk_gimme; \
7e27c4a5
DM
1341 PERL_UNUSED_VAR(newsp); /* for API */ \
1342 PERL_UNUSED_VAR(gimme); /* for API */ \
5da525e9
DM
1343 POPBLOCK(cx); \
1344 CX_POP(cx); \
1bbbfc50 1345 POPSTACK; \
9850bf21 1346 CATCH_SET(multicall_oldcatch); \
1bbbfc50 1347 SPAGAIN; \
9850bf21 1348 } STMT_END
b3ca2e83 1349
81ed78b2
DM
1350/* Change the CV of an already-pushed MULTICALL CxSUB block.
1351 * (this isn't part of the public API) */
1352
b0065247 1353#define CHANGE_MULTICALL_FLAGS(the_cv, flags) \
81ed78b2
DM
1354 STMT_START { \
1355 CV * const _nOnclAshIngNamE_ = the_cv; \
1356 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1357 PADLIST * const padlist = CvPADLIST(cv); \
81ed78b2 1358 cx = &cxstack[cxstack_ix]; \
79646418 1359 assert(CxMULTICALL(cx)); \
5ee28f95 1360 POPSUB_COMMON(cx); \
b0065247 1361 cx->cx_type = (CXt_SUB|CXp_MULTICALL|flags); \
5ee28f95 1362 PUSHSUB(cx); \
b0065247
DM
1363 if (!(flags & CXp_SUB_RE_FAKE)) \
1364 CvDEPTH(cv)++; \
81ed78b2
DM
1365 if (CvDEPTH(cv) >= 2) { \
1366 PERL_STACK_OVERFLOW_CHECK(); \
1367 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1368 } \
81ed78b2
DM
1369 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
1370 multicall_cv = cv; \
1371 multicall_cop = CvSTART(cv); \
1372 } STMT_END
b3ca2e83 1373/*
14d04a33 1374 * ex: set ts=8 sts=4 sw=4 et:
b3ca2e83 1375 */