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pp_coreargs: rationalise @_ code
[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
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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
FC
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))
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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
8e7e33ef 575#define CX_LEAVE_SCOPE(cx) LEAVE_SCOPE(cx->cx_old_savestack_ix)
dfe0f39b 576
b36bdeca 577/* base for the next two macros. Don't use directly.
d6911e1b
DM
578 * The context frame holds a reference to the CV so that it can't be
579 * freed while we're executing it */
b36bdeca 580
ee98a1d6 581#define PUSHSUB_BASE(cx) \
88dbe4af
FC
582 ENTRY_PROBE(CvNAMED(cv) \
583 ? HEK_KEY(CvNAME_HEK(cv)) \
584 : GvENAME(CvGV(cv)), \
c6903450 585 CopFILE((const COP *)CvSTART(cv)), \
3e2413e5
DL
586 CopLINE((const COP *)CvSTART(cv)), \
587 CopSTASHPV((const COP *)CvSTART(cv))); \
5ac1e9b2 588 \
79072805 589 cx->blk_sub.cv = cv; \
b8f55b69 590 cx->blk_sub.olddepth = CvDEPTH(cv); \
3b21fb5d 591 cx->blk_sub.prevcomppad = PL_comppad; \
ae423868 592 cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \
5f66b61c 593 cx->blk_sub.retop = NULL; \
94a11f7c 594 SvREFCNT_inc_simple_void_NN(cv);
b36bdeca 595
4587c532 596#define PUSHSUB_GET_LVALUE_MASK(func) \
777d9014
FC
597 /* If the context is indeterminate, then only the lvalue */ \
598 /* flags that the caller also has are applicable. */ \
4587c532 599 ( \
777d9014
FC
600 (PL_op->op_flags & OPf_WANT) \
601 ? OPpENTERSUB_LVAL_MASK \
602 : !(PL_op->op_private & OPpENTERSUB_LVAL_MASK) \
4587c532
FC
603 ? 0 : (U8)func(aTHX) \
604 )
605
606#define PUSHSUB(cx) \
607 { \
608 U8 phlags = PUSHSUB_GET_LVALUE_MASK(Perl_was_lvalue_sub); \
ee98a1d6 609 PUSHSUB_BASE(cx) \
446d0787 610 cx->blk_u16 = PL_op->op_private & \
0e9700df 611 (phlags|OPpDEREF); \
777d9014 612 }
79072805 613
ee98a1d6
DM
614/* variant for use by OP_DBSTATE, where op_private holds hint bits */
615#define PUSHSUB_DB(cx) \
616 PUSHSUB_BASE(cx) \
446d0787 617 cx->blk_u16 = 0;
ee98a1d6
DM
618
619
10067d9a 620#define PUSHFORMAT(cx, retop) \
f9c764c5
NC
621 cx->blk_format.cv = cv; \
622 cx->blk_format.gv = gv; \
623 cx->blk_format.retop = (retop); \
f9c764c5 624 cx->blk_format.dfoutgv = PL_defoutgv; \
3b21fb5d 625 cx->blk_format.prevcomppad = PL_comppad; \
1956db7e 626 cx->blk_u16 = 0; \
8e7e33ef 627 cx->cx_old_savestack_ix = PL_savestack_ix; \
2c50b7ed 628 SvREFCNT_inc_simple_void_NN(cv); \
f32c7e86 629 CvDEPTH(cv)++; \
f9c764c5 630 SvREFCNT_inc_void(cx->blk_format.dfoutgv)
79072805 631
fad386cb 632/* Restore old @_ */
3db8f154 633#define POP_SAVEARRAY() \
6d4ff0d2 634 STMT_START { \
fad386cb 635 AV *av = GvAV(PL_defgv); \
a8bba7fa 636 GvAV(PL_defgv) = cx->blk_sub.savearray; \
fad386cb 637 SvREFCNT_dec(av); \
6d4ff0d2 638 } STMT_END
6d4ff0d2 639
ecf8e9dd 640/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
8e09340b
GS
641 * leave any (a fast av_clear(ary), basically) */
642#define CLEAR_ARGARRAY(ary) \
643 STMT_START { \
644 AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
9c6bc640 645 AvARRAY(ary) = AvALLOC(ary); \
8e09340b
GS
646 AvFILLp(ary) = -1; \
647 } STMT_END
7766f137 648
7e27c4a5
DM
649
650/* subsets of POPSUB */
651
652#define POPSUB_COMMON(cx) \
653 PL_comppad = cx->blk_sub.prevcomppad; \
654 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
655 CvDEPTH((const CV*)cx->blk_sub.cv) = cx->blk_sub.olddepth; \
656 SvREFCNT_dec_NN(cx->blk_sub.cv);
657
658
88c90157 659#define POPSUB(cx) \
b0d9ce38 660 STMT_START { \
1956db7e
DM
661 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
662 cx->blk_u16 |= CxPOPSUB_DONE; \
88dbe4af
FC
663 RETURN_PROBE(CvNAMED(cx->blk_sub.cv) \
664 ? HEK_KEY(CvNAME_HEK(cx->blk_sub.cv)) \
665 : GvENAME(CvGV(cx->blk_sub.cv)), \
8f629a87 666 CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
3e2413e5
DL
667 CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
668 CopSTASHPV((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
5ac1e9b2 669 \
bafb2adc 670 if (CxHASARGS(cx)) { \
3073d04f 671 AV *av; \
e2657e18
DM
672 assert(AvARRAY(MUTABLE_AV( \
673 PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ \
674 CvDEPTH(cx->blk_sub.cv)])) == PL_curpad); \
7766f137 675 POP_SAVEARRAY(); \
d8b46c1b 676 /* abandon @_ if it got reified */ \
3073d04f 677 av = MUTABLE_AV(PAD_SVl(0)); \
6e45d846
DM
678 if (UNLIKELY(AvREAL(av))) \
679 clear_defarray(av, 0); \
7766f137 680 else { \
9513529b 681 CLEAR_ARGARRAY(av); \
7766f137 682 } \
79072805 683 } \
1956db7e 684 } \
7e27c4a5 685 POPSUB_COMMON(cx); \
b0d9ce38 686 } STMT_END
79072805
LW
687
688#define POPFORMAT(cx) \
25375124 689 STMT_START { \
1956db7e 690 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
25375124
FC
691 CV * const cv = cx->blk_format.cv; \
692 GV * const dfuot = cx->blk_format.dfoutgv; \
1956db7e 693 cx->blk_u16 |= CxPOPSUB_DONE; \
25375124 694 setdefout(dfuot); \
3b21fb5d
DM
695 PL_comppad = cx->blk_format.prevcomppad; \
696 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
2c50b7ed
DM
697 --CvDEPTH(cv); \
698 SvREFCNT_dec_NN(cx->blk_format.cv); \
25375124 699 SvREFCNT_dec_NN(dfuot); \
1956db7e 700 } \
25375124 701 } STMT_END
79072805
LW
702
703/* eval context */
704struct block_eval {
8e663997
NC
705 OP * retop; /* op to execute on exit from eval */
706 /* Above here is the same for sub, format and eval. */
0f79a09d 707 SV * old_namesv;
79072805 708 OP * old_eval_root;
748a9306 709 SV * cur_text;
2090ab20 710 CV * cv;
abd70938 711 JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
79072805
LW
712};
713
17347a51
NC
714/* If we ever need more than 512 op types, change the shift from 7.
715 blku_gimme is actually also only 2 bits, so could be merged with something.
716*/
717
718#define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F)
719#define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7)
85a64632 720
6b75f042 721#define PUSHEVAL(cx,n) \
0f79a09d 722 STMT_START { \
17347a51
NC
723 assert(!(PL_in_eval & ~0x7F)); \
724 assert(!(PL_op->op_type & ~0x1FF)); \
725 cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \
a0714e2c 726 cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
a8bba7fa 727 cx->blk_eval.old_eval_root = PL_eval_root; \
bdc0bf6f 728 cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
601f1833 729 cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
5f66b61c 730 cx->blk_eval.retop = NULL; \
abd70938 731 cx->blk_eval.cur_top_env = PL_top_env; \
0f79a09d 732 } STMT_END
79072805
LW
733
734#define POPEVAL(cx) \
0f79a09d 735 STMT_START { \
85a64632
NC
736 PL_in_eval = CxOLD_IN_EVAL(cx); \
737 optype = CxOLD_OP_TYPE(cx); \
7766f137 738 PL_eval_root = cx->blk_eval.old_eval_root; \
d37427bc 739 if (cx->blk_eval.cur_text && SvSCREAM(cx->blk_eval.cur_text)) \
2f995715 740 SvREFCNT_dec_NN(cx->blk_eval.cur_text); \
0f79a09d
GS
741 if (cx->blk_eval.old_namesv) \
742 sv_2mortal(cx->blk_eval.old_namesv); \
743 } STMT_END
79072805
LW
744
745/* loop context */
746struct block_loop {
79072805 747 I32 resetsp;
022eaa24 748 LOOP * my_op; /* My op, that contains redo, next and last ops. */
df530c37 749 union { /* different ways of locating the iteration variable */
b52de964
DM
750 SV **svp; /* for lexicals: address of pad slot */
751 GV *gv; /* for package vars */
df530c37 752 } itervar_u;
f0bb9bf7 753 SV *itersave; /* the original iteration var */
493b0a3c 754 union {
d01136d6
BS
755 struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/
756 AV * ary; /* use the stack if this is NULL */
757 IV ix;
758 } ary;
759 struct { /* valid if type is LOOP_LAZYIV */
760 IV cur;
761 IV end;
762 } lazyiv;
763 struct { /* valid if type if LOOP_LAZYSV */
764 SV * cur;
765 SV * end; /* maxiumum value (or minimum in reverse) */
766 } lazysv;
767 } state_u;
7766f137 768#ifdef USE_ITHREADS
b52de964 769 PAD *oldcomppad; /* needed to map itervar_u.svp during thread clone */
f83b46a0 770#endif
b52de964 771};
f83b46a0 772
9af0df0b
DM
773#define CxITERVAR(c) \
774 (CxPADLOOP(c) \
775 ? (c)->blk_loop.itervar_u.svp \
776 : ((c)->cx_type & CXp_FOR_GV) \
777 ? &GvSV((c)->blk_loop.itervar_u.gv) \
778 : (SV **)&(c)->blk_loop.itervar_u.gv)
f83b46a0 779
b1cf8b36 780#define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop))
5db1eb8d
BF
781#define CxLABEL_len(c,len) (0 + CopLABEL_len((c)->blk_oldcop, len))
782#define CxLABEL_len_flags(c,len,flags) (0 + CopLABEL_len_flags((c)->blk_oldcop, len, flags))
ae423868 783#define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
1956db7e
DM
784#define CxLVAL(c) (0 + ((c)->blk_u16 & 0xff))
785/* POPSUB has already been performed on this context frame */
786#define CxPOPSUB_DONE 0x100
787
7766f137 788
3b719c58
NC
789#define PUSHLOOP_PLAIN(cx, s) \
790 cx->blk_loop.resetsp = s - PL_stack_base; \
791 cx->blk_loop.my_op = cLOOP; \
d01136d6
BS
792 cx->blk_loop.state_u.ary.ary = NULL; \
793 cx->blk_loop.state_u.ary.ix = 0; \
8e7e33ef 794 cx->cx_old_savestack_ix = PL_savestack_ix; \
f0bb9bf7
DM
795 cx->blk_loop.itervar_u.svp = NULL; \
796 cx->blk_loop.itersave = NULL;
3b719c58 797
b52de964
DM
798#ifdef USE_ITHREADS
799# define PUSHLOOP_FOR_setpad(c) (c)->blk_loop.oldcomppad = PL_comppad
800#else
801# define PUSHLOOP_FOR_setpad(c) NOOP
802#endif
803
f0bb9bf7 804#define PUSHLOOP_FOR(cx, ivar, isave, s) \
38a230cb 805 cx->blk_loop.resetsp = s - PL_stack_base; \
022eaa24 806 cx->blk_loop.my_op = cLOOP; \
d01136d6
BS
807 cx->blk_loop.state_u.ary.ary = NULL; \
808 cx->blk_loop.state_u.ary.ix = 0; \
b52de964 809 cx->blk_loop.itervar_u.svp = (SV**)(ivar); \
8e7e33ef 810 cx->cx_old_savestack_ix = PL_savestack_ix; \
f0bb9bf7 811 cx->blk_loop.itersave = isave; \
b52de964 812 PUSHLOOP_FOR_setpad(cx);
79072805
LW
813
814#define POPLOOP(cx) \
d01136d6 815 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \
2f995715
FC
816 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.cur); \
817 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.end); \
d01136d6 818 } \
f0bb9bf7
DM
819 else if (CxTYPE(cx) == CXt_LOOP_FOR) \
820 SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); \
9af0df0b 821 if (cx->cx_type & (CXp_FOR_PAD|CXp_FOR_GV)) { \
f0bb9bf7 822 SV *cursv; \
d4e2b4d6
DM
823 SV **svp = (cx)->blk_loop.itervar_u.svp; \
824 if ((cx->cx_type & CXp_FOR_GV)) \
f0bb9bf7 825 svp = &GvSV((GV*)svp); \
d4e2b4d6
DM
826 cursv = *svp; \
827 *svp = cx->blk_loop.itersave; \
385bbb12 828 SvREFCNT_dec(cursv); \
b042e328 829 }
79072805 830
0d863452
RH
831/* given/when context */
832struct block_givwhen {
833 OP *leave_op;
b95eccd3 834 SV *defsv_save; /* the original $_ */
0d863452
RH
835};
836
b95eccd3 837#define PUSHWHEN(cx) \
8e7e33ef 838 cx->cx_old_savestack_ix = PL_savestack_ix; \
0d863452
RH
839 cx->blk_givwhen.leave_op = cLOGOP->op_other;
840
b95eccd3
DM
841#define PUSHGIVEN(cx, orig_var) \
842 PUSHWHEN(cx); \
843 cx->blk_givwhen.defsv_save = orig_var;
844
845#define POPWHEN(cx) \
2f450c1b 846 NOOP;
b95eccd3
DM
847
848#define POPGIVEN(cx) \
849 SvREFCNT_dec(GvSV(PL_defgv)); \
b042e328 850 GvSV(PL_defgv) = cx->blk_givwhen.defsv_save;
b95eccd3 851
0d863452 852
c5369ccc
DM
853/* basic block, i.e. pp_enter/leave */
854
dfe0f39b 855#define PUSHBASICBLK(cx) \
8e7e33ef 856 cx->cx_old_savestack_ix = PL_savestack_ix;
c5369ccc 857
dfe0f39b 858#define POPBASICBLK(cx) \
2f450c1b 859 NOOP;
c5369ccc
DM
860
861
79072805
LW
862/* context common to subroutines, evals and loops */
863struct block {
446d0787 864 U8 blku_type; /* what kind of context this is */
2e0df0e8 865 U8 blku_gimme; /* is this block running in list context? */
17347a51 866 U16 blku_u16; /* used by block_sub and block_eval (so far) */
79072805
LW
867 I32 blku_oldsp; /* stack pointer to copy stuff down to */
868 COP * blku_oldcop; /* old curcop pointer */
79072805
LW
869 I32 blku_oldmarksp; /* mark stack index */
870 I32 blku_oldscopesp; /* scope stack index */
871 PMOP * blku_oldpm; /* values of pattern match vars */
bb3300d1 872 SSize_t blku_old_tmpsfloor; /* saved PL_tmps_floor */
79072805
LW
873
874 union {
875 struct block_sub blku_sub;
f9c764c5 876 struct block_format blku_format;
79072805
LW
877 struct block_eval blku_eval;
878 struct block_loop blku_loop;
0d863452 879 struct block_givwhen blku_givwhen;
79072805
LW
880 } blk_u;
881};
882#define blk_oldsp cx_u.cx_blk.blku_oldsp
883#define blk_oldcop cx_u.cx_blk.blku_oldcop
79072805
LW
884#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
885#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
886#define blk_oldpm cx_u.cx_blk.blku_oldpm
887#define blk_gimme cx_u.cx_blk.blku_gimme
446d0787 888#define blk_u16 cx_u.cx_blk.blku_u16
79072805 889#define blk_sub cx_u.cx_blk.blk_u.blku_sub
f9c764c5 890#define blk_format cx_u.cx_blk.blk_u.blku_format
79072805
LW
891#define blk_eval cx_u.cx_blk.blk_u.blku_eval
892#define blk_loop cx_u.cx_blk.blk_u.blku_loop
0d863452 893#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
79072805 894
1c98cc53 895#define DEBUG_CX(action) \
d9f81b50 896 DEBUG_l( \
bb3300d1 897 Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) (save %ld,%ld) at %s:%d\n",\
1c98cc53
DM
898 (long)cxstack_ix, \
899 action, \
900 PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \
901 (long)PL_scopestack_ix, \
902 (long)(cxstack[cxstack_ix].blk_oldscopesp), \
bb3300d1 903 (long)PL_savestack_ix, \
8e7e33ef 904 (long)(cxstack[cxstack_ix].cx_old_savestack_ix), \
d9f81b50 905 __FILE__, __LINE__));
1c98cc53 906
79072805 907/* Enter a block. */
8990e307 908#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
79072805 909 cx->cx_type = t, \
3280af22
NIS
910 cx->blk_oldsp = sp - PL_stack_base, \
911 cx->blk_oldcop = PL_curcop, \
1aff0e91 912 cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
3280af22 913 cx->blk_oldscopesp = PL_scopestack_ix, \
3280af22 914 cx->blk_oldpm = PL_curpm, \
eb160463 915 cx->blk_gimme = (U8)gimme; \
94a11f7c
DM
916 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
917 PL_tmps_floor = PL_tmps_ix; \
1c98cc53 918 DEBUG_CX("PUSH");
79072805
LW
919
920/* Exit a block (RETURN and LAST). */
dd748f45 921#define POPBLOCK(cx) \
1c98cc53 922 DEBUG_CX("POP"); \
3280af22
NIS
923 PL_curcop = cx->blk_oldcop, \
924 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
925 PL_scopestack_ix = cx->blk_oldscopesp, \
72c5b62d
DM
926 /* LEAVE_SCOPE() should have made this true. /(?{})/ cheats
927 * and leaves a CX entry lying around for repeated use, so
928 * skip for multicall */ \
8e7e33ef
DM
929 assert( (CxTYPE(cx) == CXt_SUB && CxMULTICALL(cx)) \
930 || PL_savestack_ix == cx->cx_old_savestack_ix); \
b042e328 931 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
dd748f45 932 PL_curpm = cx->blk_oldpm;
79072805
LW
933
934/* Continue a block elsewhere (NEXT and REDO). */
1c98cc53
DM
935#define TOPBLOCK(cx) \
936 DEBUG_CX("TOP"); \
937 cx = &cxstack[cxstack_ix], \
1aff0e91 938 PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
939 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
940 PL_scopestack_ix = cx->blk_oldscopesp, \
1c98cc53 941 PL_curpm = cx->blk_oldpm;
79072805
LW
942
943/* substitution context */
944struct subst {
446d0787 945 U8 sbu_type; /* what kind of context this is */
1ed74d04 946 U8 sbu_rflags;
446d0787 947 U16 sbu_rxtainted; /* matches struct block */
3c6ef0a5
FC
948 SSize_t sbu_iters;
949 SSize_t sbu_maxiters;
79072805
LW
950 char * sbu_orig;
951 SV * sbu_dstr;
952 SV * sbu_targ;
953 char * sbu_s;
954 char * sbu_m;
955 char * sbu_strend;
c90c0ff4 956 void * sbu_rxres;
c07a80fd 957 REGEXP * sbu_rx;
79072805
LW
958};
959#define sb_iters cx_u.cx_subst.sbu_iters
960#define sb_maxiters cx_u.cx_subst.sbu_maxiters
22e551b9 961#define sb_rflags cx_u.cx_subst.sbu_rflags
71be2cbc 962#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
79072805
LW
963#define sb_orig cx_u.cx_subst.sbu_orig
964#define sb_dstr cx_u.cx_subst.sbu_dstr
965#define sb_targ cx_u.cx_subst.sbu_targ
966#define sb_s cx_u.cx_subst.sbu_s
967#define sb_m cx_u.cx_subst.sbu_m
968#define sb_strend cx_u.cx_subst.sbu_strend
c90c0ff4 969#define sb_rxres cx_u.cx_subst.sbu_rxres
c07a80fd 970#define sb_rx cx_u.cx_subst.sbu_rx
79072805 971
9c105995
NC
972#ifdef PERL_CORE
973# define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
216d46f4 974 cx->cx_old_savestack_ix = oldsave, \
79072805
LW
975 cx->sb_iters = iters, \
976 cx->sb_maxiters = maxiters, \
22e551b9 977 cx->sb_rflags = r_flags, \
71be2cbc 978 cx->sb_rxtainted = rxtainted, \
79072805
LW
979 cx->sb_orig = orig, \
980 cx->sb_dstr = dstr, \
981 cx->sb_targ = targ, \
982 cx->sb_s = s, \
983 cx->sb_m = m, \
984 cx->sb_strend = strend, \
4608196e 985 cx->sb_rxres = NULL, \
c07a80fd 986 cx->sb_rx = rx, \
1ed74d04 987 cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \
e22ae1e2 988 rxres_save(&cx->sb_rxres, rx); \
cf69025f
TC
989 (void)ReREFCNT_inc(rx); \
990 SvREFCNT_inc_void_NN(targ)
79072805 991
80d88db0 992# define POPSUBST(cx) \
e22ae1e2 993 rxres_free(&cx->sb_rxres); \
cf69025f
TC
994 ReREFCNT_dec(cx->sb_rx); \
995 SvREFCNT_dec_NN(cx->sb_targ)
9c105995
NC
996#endif
997
998#define CxONCE(cx) ((cx)->cx_type & CXp_ONCE)
79072805
LW
999
1000struct context {
8e7e33ef 1001 I32 cx_old_savestack_ix; /* saved PL_savestack_ix */
79072805
LW
1002 union {
1003 struct block cx_blk;
1004 struct subst cx_subst;
1005 } cx_u;
1006};
2e0df0e8 1007#define cx_type cx_u.cx_subst.sbu_type
6b35e009 1008
76753e7f
NC
1009/* If you re-order these, there is also an array of uppercase names in perl.h
1010 and a static array of context names in pp_ctl.c */
3701055e 1011#define CXTYPEMASK 0xf
79646418 1012#define CXt_NULL 0 /* currently only used for sort BLOCK */
76753e7f
NC
1013#define CXt_WHEN 1
1014#define CXt_BLOCK 2
1015/* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a
1016 jump table in pp_ctl.c
1017 The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c
1018*/
1019#define CXt_GIVEN 3
c6fdafd0 1020/* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */
76753e7f
NC
1021#define CXt_LOOP_FOR 4
1022#define CXt_LOOP_PLAIN 5
1023#define CXt_LOOP_LAZYSV 6
1024#define CXt_LOOP_LAZYIV 7
1025#define CXt_SUB 8
1026#define CXt_FORMAT 9
1027#define CXt_EVAL 10
1028#define CXt_SUBST 11
1029/* SUBST doesn't feature in all switch statements. */
79072805 1030
ae423868 1031/* private flags for CXt_SUB and CXt_FORMAT */
79646418
DM
1032#define CXp_MULTICALL 0x10 /* part of a multicall (so don't tear down
1033 context on exit). (not CXt_FORMAT) */
1f27d788 1034#define CXp_HASARGS 0x20
b0065247
DM
1035#define CXp_SUB_RE 0x40 /* code called within regex, i.e. (?{}) */
1036#define CXp_SUB_RE_FAKE 0x80 /* fake sub CX for (?{}) in current scope */
ae423868 1037
6b35e009 1038/* private flags for CXt_EVAL */
1f27d788
NC
1039#define CXp_REAL 0x20 /* truly eval'', not a lookalike */
1040#define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */
6b35e009 1041
7766f137 1042/* private flags for CXt_LOOP */
1f27d788 1043#define CXp_FOR_DEF 0x10 /* foreach using $_ */
d39c26a6 1044#define CXp_FOR_LVREF 0x20 /* foreach using \$var */
9af0df0b
DM
1045#define CXp_FOR_GV 0x40 /* foreach using package var */
1046#define CXp_FOR_PAD 0x80 /* foreach using lexical var */
1047#define CxPADLOOP(c) ((c)->cx_type & CXp_FOR_PAD)
e846cb92 1048
1ed74d04
NC
1049/* private flags for CXt_SUBST */
1050#define CXp_ONCE 0x10 /* What was sbu_once in struct subst */
7766f137 1051
6b35e009 1052#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
76753e7f 1053#define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4)
79646418 1054#define CxMULTICALL(c) ((c)->cx_type & CXp_MULTICALL)
0588a150 1055#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
7766f137 1056 == (CXt_EVAL|CXp_REAL))
0588a150 1057#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
1d76a5c3 1058 == (CXt_EVAL|CXp_TRYBLOCK))
3b719c58
NC
1059#define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN)
1060#define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \
1061 && ((c)->cx_type & CXp_FOR_DEF))
6b35e009 1062
109bf713 1063#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
79072805 1064
ccfc67b7
JH
1065/*
1066=head1 "Gimme" Values
1067*/
954c1994
GS
1068
1069/*
1070=for apidoc AmU||G_SCALAR
fbe13c60 1071Used to indicate scalar context. See C<L</GIMME_V>>, C<L</GIMME>>, and
954c1994
GS
1072L<perlcall>.
1073
1074=for apidoc AmU||G_ARRAY
fbe13c60 1075Used to indicate list context. See C<L</GIMME_V>>, C<L</GIMME>> and
954c1994
GS
1076L<perlcall>.
1077
1078=for apidoc AmU||G_VOID
fbe13c60 1079Used to indicate void context. See C<L</GIMME_V>> and L<perlcall>.
954c1994
GS
1080
1081=for apidoc AmU||G_DISCARD
1082Indicates that arguments returned from a callback should be discarded. See
1083L<perlcall>.
1084
1085=for apidoc AmU||G_EVAL
1086
1087Used to force a Perl C<eval> wrapper around a callback. See
1088L<perlcall>.
1089
1090=for apidoc AmU||G_NOARGS
1091
1092Indicates that no arguments are being sent to a callback. See
1093L<perlcall>.
1094
1095=cut
1096*/
1097
2f8edad0
NC
1098#define G_SCALAR 2
1099#define G_ARRAY 3
1100#define G_VOID 1
1101#define G_WANT 3
79072805 1102
864dbfa3 1103/* extra flags for Perl_call_* routines */
2f8edad0 1104#define G_DISCARD 4 /* Call FREETMPS.
b54b4831
NC
1105 Don't change this without consulting the
1106 hash actions codes defined in hv.h */
2f8edad0
NC
1107#define G_EVAL 8 /* Assume eval {} around subroutine call. */
1108#define G_NOARGS 16 /* Don't construct a @_ array. */
7ce09284 1109#define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */
2f8edad0
NC
1110#define G_NODEBUG 64 /* Disable debugging at toplevel. */
1111#define G_METHOD 128 /* Calling method. */
c40f1585 1112#define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
edb2152a 1113 fold_constants. */
67549bd2
NC
1114#define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef
1115 A special case for UNSHIFT in
1116 Perl_magic_methcall(). */
d1d7a15d
NC
1117#define G_WRITING_TO_STDERR 1024 /* Perl_write_to_stderr() is calling
1118 Perl_magic_methcall(). */
a1941760 1119#define G_RE_REPARSING 0x800 /* compiling a run-time /(?{..})/ */
c106c2be 1120#define G_METHOD_NAMED 4096 /* calling named method, eg without :: or ' */
e336de0d 1121
faef0170
HS
1122/* flag bits for PL_in_eval */
1123#define EVAL_NULL 0 /* not in an eval */
1124#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
1125#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
864dbfa3 1126#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
6dc8a9e4 1127#define EVAL_INREQUIRE 8 /* The code is being required. */
a1941760 1128#define EVAL_RE_REPARSING 0x10 /* eval_sv() called with G_RE_REPARSING */
faef0170 1129
e336de0d
GS
1130/* Support for switching (stack and block) contexts.
1131 * This ensures magic doesn't invalidate local stack and cx pointers.
1132 */
1133
e788e7d3
GS
1134#define PERLSI_UNKNOWN -1
1135#define PERLSI_UNDEF 0
1136#define PERLSI_MAIN 1
1137#define PERLSI_MAGIC 2
1138#define PERLSI_SORT 3
1139#define PERLSI_SIGNAL 4
1140#define PERLSI_OVERLOAD 5
1141#define PERLSI_DESTROY 6
1142#define PERLSI_WARNHOOK 7
1143#define PERLSI_DIEHOOK 8
1144#define PERLSI_REQUIRE 9
e1a10f35 1145#define PERLSI_MULTICALL 10
e336de0d
GS
1146
1147struct stackinfo {
1148 AV * si_stack; /* stack for current runlevel */
1149 PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
9bd87817
NC
1150 struct stackinfo * si_prev;
1151 struct stackinfo * si_next;
e336de0d
GS
1152 I32 si_cxix; /* current context index */
1153 I32 si_cxmax; /* maximum allocated index */
1154 I32 si_type; /* type of runlevel */
ce2f7c3b 1155 I32 si_markoff; /* offset where markstack begins for us.
e336de0d
GS
1156 * currently used only with DEBUGGING,
1157 * but not #ifdef-ed for bincompat */
1158};
1159
1160typedef struct stackinfo PERL_SI;
1161
3280af22
NIS
1162#define cxstack (PL_curstackinfo->si_cxstack)
1163#define cxstack_ix (PL_curstackinfo->si_cxix)
1164#define cxstack_max (PL_curstackinfo->si_cxmax)
e336de0d
GS
1165
1166#ifdef DEBUGGING
ce2f7c3b
GS
1167# define SET_MARK_OFFSET \
1168 PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
e336de0d 1169#else
ce2f7c3b 1170# define SET_MARK_OFFSET NOOP
e336de0d
GS
1171#endif
1172
d3acc0f7 1173#define PUSHSTACKi(type) \
e336de0d 1174 STMT_START { \
3280af22 1175 PERL_SI *next = PL_curstackinfo->si_next; \
1c98cc53
DM
1176 DEBUG_l({ \
1177 int i = 0; PERL_SI *p = PL_curstackinfo; \
1178 while (p) { i++; p = p->si_prev; } \
1179 Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \
1180 i, __FILE__, __LINE__);}) \
e336de0d
GS
1181 if (!next) { \
1182 next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
3280af22
NIS
1183 next->si_prev = PL_curstackinfo; \
1184 PL_curstackinfo->si_next = next; \
e336de0d
GS
1185 } \
1186 next->si_type = type; \
1187 next->si_cxix = -1; \
1188 AvFILLp(next->si_stack) = 0; \
3280af22
NIS
1189 SWITCHSTACK(PL_curstack,next->si_stack); \
1190 PL_curstackinfo = next; \
ce2f7c3b 1191 SET_MARK_OFFSET; \
e336de0d
GS
1192 } STMT_END
1193
e788e7d3 1194#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
d3acc0f7 1195
3095d977
GS
1196/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
1197 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
d3acc0f7 1198#define POPSTACK \
e336de0d 1199 STMT_START { \
39644a26 1200 dSP; \
c4420975 1201 PERL_SI * const prev = PL_curstackinfo->si_prev; \
1c98cc53
DM
1202 DEBUG_l({ \
1203 int i = -1; PERL_SI *p = PL_curstackinfo; \
1204 while (p) { i++; p = p->si_prev; } \
1205 Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \
1206 i, __FILE__, __LINE__);}) \
e336de0d 1207 if (!prev) { \
3d04513d 1208 Perl_croak_popstack(); \
e336de0d 1209 } \
3280af22 1210 SWITCHSTACK(PL_curstack,prev->si_stack); \
e336de0d 1211 /* don't free prev here, free them all at the END{} */ \
3280af22 1212 PL_curstackinfo = prev; \
e336de0d
GS
1213 } STMT_END
1214
1215#define POPSTACK_TO(s) \
1216 STMT_START { \
3280af22 1217 while (PL_curstack != s) { \
bac4b2ad 1218 dounwind(-1); \
d3acc0f7 1219 POPSTACK; \
bac4b2ad 1220 } \
e336de0d 1221 } STMT_END
923e4eb5
JH
1222
1223#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
1224#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
1225
9850bf21
RH
1226/*
1227=head1 Multicall Functions
1228
1229=for apidoc Ams||dMULTICALL
72d33970 1230Declare local variables for a multicall. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1231
1232=for apidoc Ams||PUSH_MULTICALL
1233Opening bracket for a lightweight callback.
0eda4409 1234See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1235
1236=for apidoc Ams||MULTICALL
72d33970 1237Make a lightweight callback. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1238
1239=for apidoc Ams||POP_MULTICALL
1240Closing bracket for a lightweight callback.
0eda4409 1241See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1242
1243=cut
1244*/
1245
1246#define dMULTICALL \
1247 SV **newsp; /* set by POPBLOCK */ \
1248 PERL_CONTEXT *cx; \
82f35e8b 1249 CV *multicall_cv; \
9850bf21
RH
1250 OP *multicall_cop; \
1251 bool multicall_oldcatch; \
1252 U8 hasargs = 0 /* used by PUSHSUB */
1253
82f35e8b 1254#define PUSH_MULTICALL(the_cv) \
b0065247 1255 PUSH_MULTICALL_FLAGS(the_cv, 0)
81ed78b2 1256
b0065247
DM
1257/* Like PUSH_MULTICALL, but allows you to specify extra flags
1258 * for the CX stack entry (this isn't part of the public API) */
81ed78b2 1259
b0065247 1260#define PUSH_MULTICALL_FLAGS(the_cv, flags) \
9850bf21 1261 STMT_START { \
0bcc34c2
AL
1262 CV * const _nOnclAshIngNamE_ = the_cv; \
1263 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1264 PADLIST * const padlist = CvPADLIST(cv); \
9850bf21 1265 multicall_oldcatch = CATCH_GET; \
9850bf21 1266 CATCH_SET(TRUE); \
e1a10f35 1267 PUSHSTACKi(PERLSI_MULTICALL); \
b0065247 1268 PUSHBLOCK(cx, (CXt_SUB|CXp_MULTICALL|flags), PL_stack_sp); \
9850bf21 1269 PUSHSUB(cx); \
8e7e33ef 1270 cx->cx_old_savestack_ix = PL_savestack_ix; \
8ae997c5 1271 SAVEVPTR(PL_op); \
b0065247
DM
1272 if (!(flags & CXp_SUB_RE_FAKE)) \
1273 CvDEPTH(cv)++; \
81ed78b2 1274 if (CvDEPTH(cv) >= 2) { \
9850bf21
RH
1275 PERL_STACK_OVERFLOW_CHECK(); \
1276 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1277 } \
9850bf21 1278 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
82f35e8b 1279 multicall_cv = cv; \
7e27c4a5 1280 PERL_UNUSED_VAR(multicall_cv); /* for API */ \
9850bf21
RH
1281 multicall_cop = CvSTART(cv); \
1282 } STMT_END
1283
1284#define MULTICALL \
1285 STMT_START { \
1286 PL_op = multicall_cop; \
1287 CALLRUNOPS(aTHX); \
1288 } STMT_END
1289
1290#define POP_MULTICALL \
1291 STMT_START { \
3d26b81e 1292 cx = &cxstack[cxstack_ix]; \
dfe0f39b 1293 CX_LEAVE_SCOPE(cx); \
7e27c4a5
DM
1294 POPSUB_COMMON(cx); \
1295 POPBLOCK(cx); \
4df352a8
DM
1296 newsp = PL_stack_base + cx->blk_oldsp; \
1297 gimme = cx->blk_gimme; \
7e27c4a5
DM
1298 PERL_UNUSED_VAR(newsp); /* for API */ \
1299 PERL_UNUSED_VAR(gimme); /* for API */ \
4df352a8 1300 cxstack_ix--; \
1bbbfc50 1301 POPSTACK; \
9850bf21 1302 CATCH_SET(multicall_oldcatch); \
1bbbfc50 1303 SPAGAIN; \
9850bf21 1304 } STMT_END
b3ca2e83 1305
81ed78b2
DM
1306/* Change the CV of an already-pushed MULTICALL CxSUB block.
1307 * (this isn't part of the public API) */
1308
b0065247 1309#define CHANGE_MULTICALL_FLAGS(the_cv, flags) \
81ed78b2
DM
1310 STMT_START { \
1311 CV * const _nOnclAshIngNamE_ = the_cv; \
1312 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1313 PADLIST * const padlist = CvPADLIST(cv); \
81ed78b2 1314 cx = &cxstack[cxstack_ix]; \
79646418 1315 assert(CxMULTICALL(cx)); \
2c50b7ed 1316 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
88c90157 1317 SvREFCNT_dec_NN(multicall_cv); \
b0065247 1318 cx->cx_type = (CXt_SUB|CXp_MULTICALL|flags); \
1dfbe6b4
DM
1319 { \
1320 /* save a few things that we don't want PUSHSUB to zap */ \
1321 PAD * const prevcomppad = cx->blk_sub.prevcomppad; \
1dfbe6b4
DM
1322 PUSHSUB(cx); \
1323 /* undo the stuff that PUSHSUB zapped */ \
1324 cx->blk_sub.prevcomppad = prevcomppad ; \
1dfbe6b4 1325 } \
b0065247
DM
1326 if (!(flags & CXp_SUB_RE_FAKE)) \
1327 CvDEPTH(cv)++; \
81ed78b2
DM
1328 if (CvDEPTH(cv) >= 2) { \
1329 PERL_STACK_OVERFLOW_CHECK(); \
1330 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1331 } \
81ed78b2
DM
1332 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
1333 multicall_cv = cv; \
1334 multicall_cop = CvSTART(cv); \
1335 } STMT_END
b3ca2e83 1336/*
14d04a33 1337 * ex: set ts=8 sts=4 sw=4 et:
b3ca2e83 1338 */