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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
JH
11 * They hold information important for lexical state and error reporting.
12 * At run time, PL_curcop is set to point to the most recently executed cop,
a3985cdc 13 * and thus can be used to determine our current state.
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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
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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 */
9aa350eb
DM
553 I32 old_savestack_ix; /* saved PL_savestack_ix (also CXt_NULL) */
554 SSize_t old_tmpsfloor; /* also used in CXt_NULL sort block */
adcbf118 555 /* Above here is the same for sub, format and eval. */
9aa350eb 556 PAD *prevcomppad; /* the caller's PL_comppad */
8e663997 557 CV * cv;
f9c764c5 558 /* Above here is the same for sub and format. */
bb172083 559 I32 olddepth;
3073d04f 560 AV *savearray;
f9c764c5
NC
561};
562
563
564/* format context */
565struct block_format {
f39bc417 566 OP * retop; /* op to execute on exit from sub */
9aa350eb
DM
567 I32 old_savestack_ix; /* saved PL_savestack_ix (also CXt_NULL) */
568 SSize_t old_tmpsfloor; /* also used in CXt_NULL sort block */
adcbf118 569 /* Above here is the same for sub, format and eval. */
9aa350eb 570 PAD *prevcomppad; /* the caller's PL_comppad */
8e663997 571 CV * cv;
f9c764c5
NC
572 /* Above here is the same for sub and format. */
573 GV * gv;
574 GV * dfoutgv;
79072805
LW
575};
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; \
1dfbe6b4
DM
594 SvREFCNT_inc_simple_void_NN(cv); \
595 cx->blk_sub.old_tmpsfloor = PL_tmps_floor; \
596 PL_tmps_floor = PL_tmps_ix;
b36bdeca 597
4587c532 598#define PUSHSUB_GET_LVALUE_MASK(func) \
777d9014
FC
599 /* If the context is indeterminate, then only the lvalue */ \
600 /* flags that the caller also has are applicable. */ \
4587c532 601 ( \
777d9014
FC
602 (PL_op->op_flags & OPf_WANT) \
603 ? OPpENTERSUB_LVAL_MASK \
604 : !(PL_op->op_private & OPpENTERSUB_LVAL_MASK) \
4587c532
FC
605 ? 0 : (U8)func(aTHX) \
606 )
607
608#define PUSHSUB(cx) \
609 { \
610 U8 phlags = PUSHSUB_GET_LVALUE_MASK(Perl_was_lvalue_sub); \
ee98a1d6 611 PUSHSUB_BASE(cx) \
446d0787 612 cx->blk_u16 = PL_op->op_private & \
0e9700df 613 (phlags|OPpDEREF); \
777d9014 614 }
79072805 615
ee98a1d6
DM
616/* variant for use by OP_DBSTATE, where op_private holds hint bits */
617#define PUSHSUB_DB(cx) \
618 PUSHSUB_BASE(cx) \
446d0787 619 cx->blk_u16 = 0;
ee98a1d6
DM
620
621
10067d9a 622#define PUSHFORMAT(cx, retop) \
f9c764c5
NC
623 cx->blk_format.cv = cv; \
624 cx->blk_format.gv = gv; \
625 cx->blk_format.retop = (retop); \
f9c764c5 626 cx->blk_format.dfoutgv = PL_defoutgv; \
3b21fb5d 627 cx->blk_format.prevcomppad = PL_comppad; \
1956db7e 628 cx->blk_u16 = 0; \
9aa350eb
DM
629 cx->blk_format.old_savestack_ix = PL_savestack_ix; \
630 cx->blk_format.old_tmpsfloor = PL_tmps_floor; \
631 PL_tmps_floor = PL_tmps_ix; \
2c50b7ed 632 SvREFCNT_inc_simple_void_NN(cv); \
f32c7e86 633 CvDEPTH(cv)++; \
f9c764c5 634 SvREFCNT_inc_void(cx->blk_format.dfoutgv)
79072805 635
fad386cb 636/* Restore old @_ */
3db8f154 637#define POP_SAVEARRAY() \
6d4ff0d2 638 STMT_START { \
fad386cb 639 AV *av = GvAV(PL_defgv); \
a8bba7fa 640 GvAV(PL_defgv) = cx->blk_sub.savearray; \
fad386cb 641 SvREFCNT_dec(av); \
6d4ff0d2 642 } STMT_END
6d4ff0d2 643
ecf8e9dd 644/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
8e09340b
GS
645 * leave any (a fast av_clear(ary), basically) */
646#define CLEAR_ARGARRAY(ary) \
647 STMT_START { \
648 AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
9c6bc640 649 AvARRAY(ary) = AvALLOC(ary); \
8e09340b
GS
650 AvFILLp(ary) = -1; \
651 } STMT_END
7766f137 652
b0d9ce38
GS
653#define POPSUB(cx,sv) \
654 STMT_START { \
8ae997c5 655 LEAVE_SCOPE(cx->blk_sub.old_savestack_ix); \
1956db7e
DM
656 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
657 cx->blk_u16 |= CxPOPSUB_DONE; \
88dbe4af
FC
658 RETURN_PROBE(CvNAMED(cx->blk_sub.cv) \
659 ? HEK_KEY(CvNAME_HEK(cx->blk_sub.cv)) \
660 : GvENAME(CvGV(cx->blk_sub.cv)), \
8f629a87 661 CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
3e2413e5
DL
662 CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
663 CopSTASHPV((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
5ac1e9b2 664 \
bafb2adc 665 if (CxHASARGS(cx)) { \
3073d04f 666 AV *av; \
e2657e18
DM
667 assert(AvARRAY(MUTABLE_AV( \
668 PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ \
669 CvDEPTH(cx->blk_sub.cv)])) == PL_curpad); \
7766f137 670 POP_SAVEARRAY(); \
d8b46c1b 671 /* abandon @_ if it got reified */ \
3073d04f 672 av = MUTABLE_AV(PAD_SVl(0)); \
6e45d846
DM
673 if (UNLIKELY(AvREAL(av))) \
674 clear_defarray(av, 0); \
7766f137 675 else { \
9513529b 676 CLEAR_ARGARRAY(av); \
7766f137 677 } \
79072805 678 } \
1956db7e 679 } \
1dfbe6b4 680 PL_tmps_floor = cx->blk_sub.old_tmpsfloor; \
3b21fb5d
DM
681 PL_comppad = cx->blk_sub.prevcomppad; \
682 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
3073d04f
DM
683 sv = MUTABLE_SV(cx->blk_sub.cv); \
684 CvDEPTH((const CV*)sv) = cx->blk_sub.olddepth; \
b0d9ce38
GS
685 } STMT_END
686
687#define LEAVESUB(sv) \
688 STMT_START { \
d2687c98 689 SvREFCNT_dec(sv); \
b0d9ce38 690 } STMT_END
79072805
LW
691
692#define POPFORMAT(cx) \
25375124 693 STMT_START { \
9aa350eb 694 LEAVE_SCOPE(cx->blk_format.old_savestack_ix); \
1956db7e 695 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
25375124
FC
696 CV * const cv = cx->blk_format.cv; \
697 GV * const dfuot = cx->blk_format.dfoutgv; \
1956db7e 698 cx->blk_u16 |= CxPOPSUB_DONE; \
9aa350eb 699 PL_tmps_floor = cx->blk_format.old_tmpsfloor; \
25375124 700 setdefout(dfuot); \
3b21fb5d
DM
701 PL_comppad = cx->blk_format.prevcomppad; \
702 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
2c50b7ed
DM
703 --CvDEPTH(cv); \
704 SvREFCNT_dec_NN(cx->blk_format.cv); \
25375124 705 SvREFCNT_dec_NN(dfuot); \
1956db7e 706 } \
25375124 707 } STMT_END
79072805
LW
708
709/* eval context */
710struct block_eval {
8e663997 711 OP * retop; /* op to execute on exit from eval */
adcbf118
DM
712 I32 old_savestack_ix; /* saved PL_savestack_ix (also CXt_NULL) */
713 SSize_t old_tmpsfloor; /* also used in CXt_NULL sort block */
8e663997 714 /* Above here is the same for sub, format and eval. */
0f79a09d 715 SV * old_namesv;
79072805 716 OP * old_eval_root;
748a9306 717 SV * cur_text;
2090ab20 718 CV * cv;
abd70938 719 JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
79072805
LW
720};
721
17347a51
NC
722/* If we ever need more than 512 op types, change the shift from 7.
723 blku_gimme is actually also only 2 bits, so could be merged with something.
724*/
725
726#define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F)
727#define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7)
85a64632 728
6b75f042 729#define PUSHEVAL(cx,n) \
0f79a09d 730 STMT_START { \
17347a51
NC
731 assert(!(PL_in_eval & ~0x7F)); \
732 assert(!(PL_op->op_type & ~0x1FF)); \
733 cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \
adcbf118
DM
734 cx->blk_eval.old_tmpsfloor = PL_tmps_floor; \
735 PL_tmps_floor = PL_tmps_ix; \
a0714e2c 736 cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
a8bba7fa 737 cx->blk_eval.old_eval_root = PL_eval_root; \
bdc0bf6f 738 cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
601f1833 739 cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
5f66b61c 740 cx->blk_eval.retop = NULL; \
abd70938 741 cx->blk_eval.cur_top_env = PL_top_env; \
0f79a09d 742 } STMT_END
79072805
LW
743
744#define POPEVAL(cx) \
0f79a09d 745 STMT_START { \
85a64632
NC
746 PL_in_eval = CxOLD_IN_EVAL(cx); \
747 optype = CxOLD_OP_TYPE(cx); \
7766f137 748 PL_eval_root = cx->blk_eval.old_eval_root; \
d37427bc 749 if (cx->blk_eval.cur_text && SvSCREAM(cx->blk_eval.cur_text)) \
2f995715 750 SvREFCNT_dec_NN(cx->blk_eval.cur_text); \
0f79a09d
GS
751 if (cx->blk_eval.old_namesv) \
752 sv_2mortal(cx->blk_eval.old_namesv); \
753 } STMT_END
79072805
LW
754
755/* loop context */
756struct block_loop {
79072805 757 I32 resetsp;
7b0c33a2 758 I32 old_savestack_ix; /* saved PL_savestack_ix (also CXt_NULL) */
022eaa24 759 LOOP * my_op; /* My op, that contains redo, next and last ops. */
df530c37 760 union { /* different ways of locating the iteration variable */
b52de964
DM
761 SV **svp; /* for lexicals: address of pad slot */
762 GV *gv; /* for package vars */
df530c37 763 } itervar_u;
f0bb9bf7 764 SV *itersave; /* the original iteration var */
493b0a3c 765 union {
d01136d6
BS
766 struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/
767 AV * ary; /* use the stack if this is NULL */
768 IV ix;
769 } ary;
770 struct { /* valid if type is LOOP_LAZYIV */
771 IV cur;
772 IV end;
773 } lazyiv;
774 struct { /* valid if type if LOOP_LAZYSV */
775 SV * cur;
776 SV * end; /* maxiumum value (or minimum in reverse) */
777 } lazysv;
778 } state_u;
7766f137 779#ifdef USE_ITHREADS
b52de964 780 PAD *oldcomppad; /* needed to map itervar_u.svp during thread clone */
f83b46a0 781#endif
b52de964 782};
f83b46a0
DM
783
784#define CxITERVAR(c) \
b52de964
DM
785 (CxPADLOOP(c) \
786 ? (c)->blk_loop.itervar_u.svp \
787 : (c)->blk_loop.itervar_u.svp \
788 ? isGV((c)->blk_loop.itervar_u.gv) \
789 ? &GvSV((c)->blk_loop.itervar_u.gv) \
790 : (SV **)&(c)->blk_loop.itervar_u.gv \
791 : (SV**)NULL)
f83b46a0 792
b1cf8b36 793#define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop))
5db1eb8d
BF
794#define CxLABEL_len(c,len) (0 + CopLABEL_len((c)->blk_oldcop, len))
795#define CxLABEL_len_flags(c,len,flags) (0 + CopLABEL_len_flags((c)->blk_oldcop, len, flags))
ae423868 796#define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
1956db7e
DM
797#define CxLVAL(c) (0 + ((c)->blk_u16 & 0xff))
798/* POPSUB has already been performed on this context frame */
799#define CxPOPSUB_DONE 0x100
800
7766f137 801
3b719c58
NC
802#define PUSHLOOP_PLAIN(cx, s) \
803 cx->blk_loop.resetsp = s - PL_stack_base; \
804 cx->blk_loop.my_op = cLOOP; \
d01136d6
BS
805 cx->blk_loop.state_u.ary.ary = NULL; \
806 cx->blk_loop.state_u.ary.ix = 0; \
7b0c33a2 807 cx->blk_loop.old_savestack_ix = PL_savestack_ix; \
f0bb9bf7
DM
808 cx->blk_loop.itervar_u.svp = NULL; \
809 cx->blk_loop.itersave = NULL;
3b719c58 810
b52de964
DM
811#ifdef USE_ITHREADS
812# define PUSHLOOP_FOR_setpad(c) (c)->blk_loop.oldcomppad = PL_comppad
813#else
814# define PUSHLOOP_FOR_setpad(c) NOOP
815#endif
816
f0bb9bf7 817#define PUSHLOOP_FOR(cx, ivar, isave, s) \
38a230cb 818 cx->blk_loop.resetsp = s - PL_stack_base; \
022eaa24 819 cx->blk_loop.my_op = cLOOP; \
d01136d6
BS
820 cx->blk_loop.state_u.ary.ary = NULL; \
821 cx->blk_loop.state_u.ary.ix = 0; \
b52de964 822 cx->blk_loop.itervar_u.svp = (SV**)(ivar); \
7b0c33a2 823 cx->blk_loop.old_savestack_ix = PL_savestack_ix; \
f0bb9bf7 824 cx->blk_loop.itersave = isave; \
b52de964 825 PUSHLOOP_FOR_setpad(cx);
79072805
LW
826
827#define POPLOOP(cx) \
7b0c33a2 828 LEAVE_SCOPE(cx->blk_loop.old_savestack_ix); \
d01136d6 829 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \
2f995715
FC
830 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.cur); \
831 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.end); \
d01136d6 832 } \
f0bb9bf7
DM
833 else if (CxTYPE(cx) == CXt_LOOP_FOR) \
834 SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); \
835 if (cx->blk_loop.itersave) { \
836 SV **svp = (cx)->blk_loop.itervar_u.svp; \
837 SV *cursv; \
838 if (isGV((GV*)svp)) { \
839 svp = &GvSV((GV*)svp); \
840 cursv = *svp; \
841 *svp = cx->blk_loop.itersave; \
f0bb9bf7
DM
842 } \
843 else { \
844 cursv = *svp; \
845 *svp = cx->blk_loop.itersave; \
846 } \
385bbb12 847 SvREFCNT_dec(cursv); \
f0bb9bf7 848 } \
79072805 849
0d863452
RH
850/* given/when context */
851struct block_givwhen {
852 OP *leave_op;
853};
854
855#define PUSHGIVEN(cx) \
856 cx->blk_givwhen.leave_op = cLOGOP->op_other;
857
858#define PUSHWHEN PUSHGIVEN
859
79072805
LW
860/* context common to subroutines, evals and loops */
861struct block {
446d0787 862 U8 blku_type; /* what kind of context this is */
2e0df0e8 863 U8 blku_gimme; /* is this block running in list context? */
17347a51 864 U16 blku_u16; /* used by block_sub and block_eval (so far) */
79072805
LW
865 I32 blku_oldsp; /* stack pointer to copy stuff down to */
866 COP * blku_oldcop; /* old curcop pointer */
79072805
LW
867 I32 blku_oldmarksp; /* mark stack index */
868 I32 blku_oldscopesp; /* scope stack index */
869 PMOP * blku_oldpm; /* values of pattern match vars */
79072805
LW
870
871 union {
872 struct block_sub blku_sub;
f9c764c5 873 struct block_format blku_format;
79072805
LW
874 struct block_eval blku_eval;
875 struct block_loop blku_loop;
0d863452 876 struct block_givwhen blku_givwhen;
79072805
LW
877 } blk_u;
878};
879#define blk_oldsp cx_u.cx_blk.blku_oldsp
880#define blk_oldcop cx_u.cx_blk.blku_oldcop
79072805
LW
881#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
882#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
883#define blk_oldpm cx_u.cx_blk.blku_oldpm
884#define blk_gimme cx_u.cx_blk.blku_gimme
446d0787 885#define blk_u16 cx_u.cx_blk.blku_u16
79072805 886#define blk_sub cx_u.cx_blk.blk_u.blku_sub
f9c764c5 887#define blk_format cx_u.cx_blk.blk_u.blku_format
79072805
LW
888#define blk_eval cx_u.cx_blk.blk_u.blku_eval
889#define blk_loop cx_u.cx_blk.blk_u.blku_loop
0d863452 890#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
79072805 891
1c98cc53 892#define DEBUG_CX(action) \
d9f81b50 893 DEBUG_l( \
1c98cc53
DM
894 Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) at %s:%d\n", \
895 (long)cxstack_ix, \
896 action, \
897 PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \
898 (long)PL_scopestack_ix, \
899 (long)(cxstack[cxstack_ix].blk_oldscopesp), \
d9f81b50 900 __FILE__, __LINE__));
1c98cc53 901
79072805 902/* Enter a block. */
8990e307 903#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
79072805 904 cx->cx_type = t, \
3280af22
NIS
905 cx->blk_oldsp = sp - PL_stack_base, \
906 cx->blk_oldcop = PL_curcop, \
1aff0e91 907 cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
3280af22 908 cx->blk_oldscopesp = PL_scopestack_ix, \
3280af22 909 cx->blk_oldpm = PL_curpm, \
eb160463 910 cx->blk_gimme = (U8)gimme; \
1c98cc53 911 DEBUG_CX("PUSH");
79072805
LW
912
913/* Exit a block (RETURN and LAST). */
1c98cc53
DM
914#define POPBLOCK(cx,pm) \
915 DEBUG_CX("POP"); \
916 cx = &cxstack[cxstack_ix--], \
1aff0e91 917 newsp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
918 PL_curcop = cx->blk_oldcop, \
919 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
920 PL_scopestack_ix = cx->blk_oldscopesp, \
3280af22 921 pm = cx->blk_oldpm, \
1c98cc53 922 gimme = cx->blk_gimme;
79072805
LW
923
924/* Continue a block elsewhere (NEXT and REDO). */
1c98cc53
DM
925#define TOPBLOCK(cx) \
926 DEBUG_CX("TOP"); \
927 cx = &cxstack[cxstack_ix], \
1aff0e91 928 PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
929 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
930 PL_scopestack_ix = cx->blk_oldscopesp, \
1c98cc53 931 PL_curpm = cx->blk_oldpm;
79072805
LW
932
933/* substitution context */
934struct subst {
446d0787 935 U8 sbu_type; /* what kind of context this is */
1ed74d04 936 U8 sbu_rflags;
446d0787 937 U16 sbu_rxtainted; /* matches struct block */
4633a7c4 938 I32 sbu_oldsave;
3c6ef0a5
FC
939 SSize_t sbu_iters;
940 SSize_t sbu_maxiters;
79072805
LW
941 char * sbu_orig;
942 SV * sbu_dstr;
943 SV * sbu_targ;
944 char * sbu_s;
945 char * sbu_m;
946 char * sbu_strend;
c90c0ff4 947 void * sbu_rxres;
c07a80fd 948 REGEXP * sbu_rx;
79072805
LW
949};
950#define sb_iters cx_u.cx_subst.sbu_iters
951#define sb_maxiters cx_u.cx_subst.sbu_maxiters
22e551b9 952#define sb_rflags cx_u.cx_subst.sbu_rflags
4633a7c4 953#define sb_oldsave cx_u.cx_subst.sbu_oldsave
71be2cbc 954#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
79072805
LW
955#define sb_orig cx_u.cx_subst.sbu_orig
956#define sb_dstr cx_u.cx_subst.sbu_dstr
957#define sb_targ cx_u.cx_subst.sbu_targ
958#define sb_s cx_u.cx_subst.sbu_s
959#define sb_m cx_u.cx_subst.sbu_m
960#define sb_strend cx_u.cx_subst.sbu_strend
c90c0ff4 961#define sb_rxres cx_u.cx_subst.sbu_rxres
c07a80fd 962#define sb_rx cx_u.cx_subst.sbu_rx
79072805 963
9c105995
NC
964#ifdef PERL_CORE
965# define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
79072805
LW
966 cx->sb_iters = iters, \
967 cx->sb_maxiters = maxiters, \
22e551b9 968 cx->sb_rflags = r_flags, \
4633a7c4 969 cx->sb_oldsave = oldsave, \
71be2cbc 970 cx->sb_rxtainted = rxtainted, \
79072805
LW
971 cx->sb_orig = orig, \
972 cx->sb_dstr = dstr, \
973 cx->sb_targ = targ, \
974 cx->sb_s = s, \
975 cx->sb_m = m, \
976 cx->sb_strend = strend, \
4608196e 977 cx->sb_rxres = NULL, \
c07a80fd 978 cx->sb_rx = rx, \
1ed74d04 979 cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \
e22ae1e2 980 rxres_save(&cx->sb_rxres, rx); \
cf69025f
TC
981 (void)ReREFCNT_inc(rx); \
982 SvREFCNT_inc_void_NN(targ)
79072805 983
9c105995 984# define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
e22ae1e2 985 rxres_free(&cx->sb_rxres); \
cf69025f
TC
986 ReREFCNT_dec(cx->sb_rx); \
987 SvREFCNT_dec_NN(cx->sb_targ)
9c105995
NC
988#endif
989
990#define CxONCE(cx) ((cx)->cx_type & CXp_ONCE)
79072805
LW
991
992struct context {
79072805
LW
993 union {
994 struct block cx_blk;
995 struct subst cx_subst;
996 } cx_u;
997};
2e0df0e8 998#define cx_type cx_u.cx_subst.sbu_type
6b35e009 999
76753e7f
NC
1000/* If you re-order these, there is also an array of uppercase names in perl.h
1001 and a static array of context names in pp_ctl.c */
3701055e 1002#define CXTYPEMASK 0xf
79072805 1003#define CXt_NULL 0
76753e7f
NC
1004#define CXt_WHEN 1
1005#define CXt_BLOCK 2
1006/* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a
1007 jump table in pp_ctl.c
1008 The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c
1009*/
1010#define CXt_GIVEN 3
c6fdafd0 1011/* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */
76753e7f
NC
1012#define CXt_LOOP_FOR 4
1013#define CXt_LOOP_PLAIN 5
1014#define CXt_LOOP_LAZYSV 6
1015#define CXt_LOOP_LAZYIV 7
1016#define CXt_SUB 8
1017#define CXt_FORMAT 9
1018#define CXt_EVAL 10
1019#define CXt_SUBST 11
1020/* SUBST doesn't feature in all switch statements. */
79072805 1021
3701055e
NC
1022/* private flags for CXt_SUB and CXt_NULL
1023 However, this is checked in many places which do not check the type, so
1024 this bit needs to be kept clear for most everything else. For reasons I
1025 haven't investigated, it can coexist with CXp_FOR_DEF */
1f27d788
NC
1026#define CXp_MULTICALL 0x10 /* part of a multicall (so don't
1027 tear down context on exit). */
9850bf21 1028
ae423868 1029/* private flags for CXt_SUB and CXt_FORMAT */
1f27d788 1030#define CXp_HASARGS 0x20
b0065247
DM
1031#define CXp_SUB_RE 0x40 /* code called within regex, i.e. (?{}) */
1032#define CXp_SUB_RE_FAKE 0x80 /* fake sub CX for (?{}) in current scope */
ae423868 1033
6b35e009 1034/* private flags for CXt_EVAL */
1f27d788
NC
1035#define CXp_REAL 0x20 /* truly eval'', not a lookalike */
1036#define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */
6b35e009 1037
7766f137 1038/* private flags for CXt_LOOP */
1f27d788 1039#define CXp_FOR_DEF 0x10 /* foreach using $_ */
d39c26a6 1040#define CXp_FOR_LVREF 0x20 /* foreach using \$var */
56b98d0f 1041#define CxPADLOOP(c) ((c)->blk_loop.my_op->op_targ)
e846cb92 1042
1ed74d04
NC
1043/* private flags for CXt_SUBST */
1044#define CXp_ONCE 0x10 /* What was sbu_once in struct subst */
7766f137 1045
6b35e009 1046#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
76753e7f 1047#define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4)
9850bf21
RH
1048#define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
1049 == CXp_MULTICALL)
0588a150 1050#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
7766f137 1051 == (CXt_EVAL|CXp_REAL))
0588a150 1052#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
1d76a5c3 1053 == (CXt_EVAL|CXp_TRYBLOCK))
3b719c58
NC
1054#define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN)
1055#define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \
1056 && ((c)->cx_type & CXp_FOR_DEF))
6b35e009 1057
109bf713 1058#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
79072805 1059
ccfc67b7
JH
1060/*
1061=head1 "Gimme" Values
1062*/
954c1994
GS
1063
1064/*
1065=for apidoc AmU||G_SCALAR
fbe13c60 1066Used to indicate scalar context. See C<L</GIMME_V>>, C<L</GIMME>>, and
954c1994
GS
1067L<perlcall>.
1068
1069=for apidoc AmU||G_ARRAY
fbe13c60 1070Used to indicate list context. See C<L</GIMME_V>>, C<L</GIMME>> and
954c1994
GS
1071L<perlcall>.
1072
1073=for apidoc AmU||G_VOID
fbe13c60 1074Used to indicate void context. See C<L</GIMME_V>> and L<perlcall>.
954c1994
GS
1075
1076=for apidoc AmU||G_DISCARD
1077Indicates that arguments returned from a callback should be discarded. See
1078L<perlcall>.
1079
1080=for apidoc AmU||G_EVAL
1081
1082Used to force a Perl C<eval> wrapper around a callback. See
1083L<perlcall>.
1084
1085=for apidoc AmU||G_NOARGS
1086
1087Indicates that no arguments are being sent to a callback. See
1088L<perlcall>.
1089
1090=cut
1091*/
1092
2f8edad0
NC
1093#define G_SCALAR 2
1094#define G_ARRAY 3
1095#define G_VOID 1
1096#define G_WANT 3
79072805 1097
864dbfa3 1098/* extra flags for Perl_call_* routines */
2f8edad0 1099#define G_DISCARD 4 /* Call FREETMPS.
b54b4831
NC
1100 Don't change this without consulting the
1101 hash actions codes defined in hv.h */
2f8edad0
NC
1102#define G_EVAL 8 /* Assume eval {} around subroutine call. */
1103#define G_NOARGS 16 /* Don't construct a @_ array. */
7ce09284 1104#define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */
2f8edad0
NC
1105#define G_NODEBUG 64 /* Disable debugging at toplevel. */
1106#define G_METHOD 128 /* Calling method. */
c40f1585 1107#define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
edb2152a 1108 fold_constants. */
67549bd2
NC
1109#define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef
1110 A special case for UNSHIFT in
1111 Perl_magic_methcall(). */
d1d7a15d
NC
1112#define G_WRITING_TO_STDERR 1024 /* Perl_write_to_stderr() is calling
1113 Perl_magic_methcall(). */
a1941760 1114#define G_RE_REPARSING 0x800 /* compiling a run-time /(?{..})/ */
c106c2be 1115#define G_METHOD_NAMED 4096 /* calling named method, eg without :: or ' */
e336de0d 1116
faef0170
HS
1117/* flag bits for PL_in_eval */
1118#define EVAL_NULL 0 /* not in an eval */
1119#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
1120#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
864dbfa3 1121#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
6dc8a9e4 1122#define EVAL_INREQUIRE 8 /* The code is being required. */
a1941760 1123#define EVAL_RE_REPARSING 0x10 /* eval_sv() called with G_RE_REPARSING */
faef0170 1124
e336de0d
GS
1125/* Support for switching (stack and block) contexts.
1126 * This ensures magic doesn't invalidate local stack and cx pointers.
1127 */
1128
e788e7d3
GS
1129#define PERLSI_UNKNOWN -1
1130#define PERLSI_UNDEF 0
1131#define PERLSI_MAIN 1
1132#define PERLSI_MAGIC 2
1133#define PERLSI_SORT 3
1134#define PERLSI_SIGNAL 4
1135#define PERLSI_OVERLOAD 5
1136#define PERLSI_DESTROY 6
1137#define PERLSI_WARNHOOK 7
1138#define PERLSI_DIEHOOK 8
1139#define PERLSI_REQUIRE 9
e1a10f35 1140#define PERLSI_MULTICALL 10
e336de0d
GS
1141
1142struct stackinfo {
1143 AV * si_stack; /* stack for current runlevel */
1144 PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
9bd87817
NC
1145 struct stackinfo * si_prev;
1146 struct stackinfo * si_next;
e336de0d
GS
1147 I32 si_cxix; /* current context index */
1148 I32 si_cxmax; /* maximum allocated index */
1149 I32 si_type; /* type of runlevel */
ce2f7c3b 1150 I32 si_markoff; /* offset where markstack begins for us.
e336de0d
GS
1151 * currently used only with DEBUGGING,
1152 * but not #ifdef-ed for bincompat */
1153};
1154
1155typedef struct stackinfo PERL_SI;
1156
3280af22
NIS
1157#define cxstack (PL_curstackinfo->si_cxstack)
1158#define cxstack_ix (PL_curstackinfo->si_cxix)
1159#define cxstack_max (PL_curstackinfo->si_cxmax)
e336de0d
GS
1160
1161#ifdef DEBUGGING
ce2f7c3b
GS
1162# define SET_MARK_OFFSET \
1163 PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
e336de0d 1164#else
ce2f7c3b 1165# define SET_MARK_OFFSET NOOP
e336de0d
GS
1166#endif
1167
d3acc0f7 1168#define PUSHSTACKi(type) \
e336de0d 1169 STMT_START { \
3280af22 1170 PERL_SI *next = PL_curstackinfo->si_next; \
1c98cc53
DM
1171 DEBUG_l({ \
1172 int i = 0; PERL_SI *p = PL_curstackinfo; \
1173 while (p) { i++; p = p->si_prev; } \
1174 Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \
1175 i, __FILE__, __LINE__);}) \
e336de0d
GS
1176 if (!next) { \
1177 next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
3280af22
NIS
1178 next->si_prev = PL_curstackinfo; \
1179 PL_curstackinfo->si_next = next; \
e336de0d
GS
1180 } \
1181 next->si_type = type; \
1182 next->si_cxix = -1; \
1183 AvFILLp(next->si_stack) = 0; \
3280af22
NIS
1184 SWITCHSTACK(PL_curstack,next->si_stack); \
1185 PL_curstackinfo = next; \
ce2f7c3b 1186 SET_MARK_OFFSET; \
e336de0d
GS
1187 } STMT_END
1188
e788e7d3 1189#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
d3acc0f7 1190
3095d977
GS
1191/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
1192 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
d3acc0f7 1193#define POPSTACK \
e336de0d 1194 STMT_START { \
39644a26 1195 dSP; \
c4420975 1196 PERL_SI * const prev = PL_curstackinfo->si_prev; \
1c98cc53
DM
1197 DEBUG_l({ \
1198 int i = -1; PERL_SI *p = PL_curstackinfo; \
1199 while (p) { i++; p = p->si_prev; } \
1200 Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \
1201 i, __FILE__, __LINE__);}) \
e336de0d 1202 if (!prev) { \
3d04513d 1203 Perl_croak_popstack(); \
e336de0d 1204 } \
3280af22 1205 SWITCHSTACK(PL_curstack,prev->si_stack); \
e336de0d 1206 /* don't free prev here, free them all at the END{} */ \
3280af22 1207 PL_curstackinfo = prev; \
e336de0d
GS
1208 } STMT_END
1209
1210#define POPSTACK_TO(s) \
1211 STMT_START { \
3280af22 1212 while (PL_curstack != s) { \
bac4b2ad 1213 dounwind(-1); \
d3acc0f7 1214 POPSTACK; \
bac4b2ad 1215 } \
e336de0d 1216 } STMT_END
923e4eb5
JH
1217
1218#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
1219#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
1220
9850bf21
RH
1221/*
1222=head1 Multicall Functions
1223
1224=for apidoc Ams||dMULTICALL
72d33970 1225Declare local variables for a multicall. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1226
1227=for apidoc Ams||PUSH_MULTICALL
1228Opening bracket for a lightweight callback.
0eda4409 1229See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1230
1231=for apidoc Ams||MULTICALL
72d33970 1232Make a lightweight callback. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1233
1234=for apidoc Ams||POP_MULTICALL
1235Closing bracket for a lightweight callback.
0eda4409 1236See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1237
1238=cut
1239*/
1240
1241#define dMULTICALL \
1242 SV **newsp; /* set by POPBLOCK */ \
1243 PERL_CONTEXT *cx; \
82f35e8b 1244 CV *multicall_cv; \
9850bf21
RH
1245 OP *multicall_cop; \
1246 bool multicall_oldcatch; \
1247 U8 hasargs = 0 /* used by PUSHSUB */
1248
82f35e8b 1249#define PUSH_MULTICALL(the_cv) \
b0065247 1250 PUSH_MULTICALL_FLAGS(the_cv, 0)
81ed78b2 1251
b0065247
DM
1252/* Like PUSH_MULTICALL, but allows you to specify extra flags
1253 * for the CX stack entry (this isn't part of the public API) */
81ed78b2 1254
b0065247 1255#define PUSH_MULTICALL_FLAGS(the_cv, flags) \
9850bf21 1256 STMT_START { \
0bcc34c2
AL
1257 CV * const _nOnclAshIngNamE_ = the_cv; \
1258 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1259 PADLIST * const padlist = CvPADLIST(cv); \
9850bf21 1260 multicall_oldcatch = CATCH_GET; \
9850bf21 1261 CATCH_SET(TRUE); \
e1a10f35 1262 PUSHSTACKi(PERLSI_MULTICALL); \
b0065247 1263 PUSHBLOCK(cx, (CXt_SUB|CXp_MULTICALL|flags), PL_stack_sp); \
9850bf21 1264 PUSHSUB(cx); \
8ae997c5
DM
1265 cx->blk_sub.old_savestack_ix = PL_savestack_ix; \
1266 SAVEVPTR(PL_op); \
b0065247
DM
1267 if (!(flags & CXp_SUB_RE_FAKE)) \
1268 CvDEPTH(cv)++; \
81ed78b2 1269 if (CvDEPTH(cv) >= 2) { \
9850bf21
RH
1270 PERL_STACK_OVERFLOW_CHECK(); \
1271 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1272 } \
9850bf21 1273 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
82f35e8b 1274 multicall_cv = cv; \
9850bf21
RH
1275 multicall_cop = CvSTART(cv); \
1276 } STMT_END
1277
1278#define MULTICALL \
1279 STMT_START { \
1280 PL_op = multicall_cop; \
1281 CALLRUNOPS(aTHX); \
1282 } STMT_END
1283
1284#define POP_MULTICALL \
1285 STMT_START { \
3d26b81e 1286 cx = &cxstack[cxstack_ix]; \
2c50b7ed
DM
1287 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
1288 LEAVESUB(multicall_cv); \
9850bf21 1289 POPBLOCK(cx,PL_curpm); \
39de75fd 1290 /* includes partial unrolled POPSUB(): */ \
8ae997c5 1291 LEAVE_SCOPE(cx->blk_sub.old_savestack_ix); \
3b21fb5d
DM
1292 PL_comppad = cx->blk_sub.prevcomppad; \
1293 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
1bbbfc50 1294 POPSTACK; \
9850bf21 1295 CATCH_SET(multicall_oldcatch); \
1bbbfc50 1296 SPAGAIN; \
9850bf21 1297 } STMT_END
b3ca2e83 1298
81ed78b2
DM
1299/* Change the CV of an already-pushed MULTICALL CxSUB block.
1300 * (this isn't part of the public API) */
1301
b0065247 1302#define CHANGE_MULTICALL_FLAGS(the_cv, flags) \
81ed78b2
DM
1303 STMT_START { \
1304 CV * const _nOnclAshIngNamE_ = the_cv; \
1305 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1306 PADLIST * const padlist = CvPADLIST(cv); \
81ed78b2
DM
1307 cx = &cxstack[cxstack_ix]; \
1308 assert(cx->cx_type & CXp_MULTICALL); \
2c50b7ed
DM
1309 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
1310 LEAVESUB(multicall_cv); \
b0065247 1311 cx->cx_type = (CXt_SUB|CXp_MULTICALL|flags); \
1dfbe6b4
DM
1312 { \
1313 /* save a few things that we don't want PUSHSUB to zap */ \
1314 PAD * const prevcomppad = cx->blk_sub.prevcomppad; \
1315 SSize_t old_floor = cx->blk_sub.old_tmpsfloor; \
1316 SSize_t floor = PL_tmps_floor; \
1317 PUSHSUB(cx); \
1318 /* undo the stuff that PUSHSUB zapped */ \
1319 cx->blk_sub.prevcomppad = prevcomppad ; \
1320 cx->blk_sub.old_tmpsfloor = old_floor; \
1321 PL_tmps_floor = floor; \
1322 } \
b0065247
DM
1323 if (!(flags & CXp_SUB_RE_FAKE)) \
1324 CvDEPTH(cv)++; \
81ed78b2
DM
1325 if (CvDEPTH(cv) >= 2) { \
1326 PERL_STACK_OVERFLOW_CHECK(); \
1327 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1328 } \
81ed78b2
DM
1329 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
1330 multicall_cv = cv; \
1331 multicall_cop = CvSTART(cv); \
1332 } STMT_END
b3ca2e83 1333/*
14d04a33 1334 * ex: set ts=8 sts=4 sw=4 et:
b3ca2e83 1335 */