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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
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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
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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
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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))
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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
575#define CX_LEAVE_SCOPE(cx) \
576 LEAVE_SCOPE(cx->cx_u.cx_blk.blku_old_savestack_ix)
577
b36bdeca 578/* base for the next two macros. Don't use directly.
d6911e1b
DM
579 * The context frame holds a reference to the CV so that it can't be
580 * freed while we're executing it */
b36bdeca 581
ee98a1d6 582#define PUSHSUB_BASE(cx) \
88dbe4af
FC
583 ENTRY_PROBE(CvNAMED(cv) \
584 ? HEK_KEY(CvNAME_HEK(cv)) \
585 : GvENAME(CvGV(cv)), \
c6903450 586 CopFILE((const COP *)CvSTART(cv)), \
3e2413e5
DL
587 CopLINE((const COP *)CvSTART(cv)), \
588 CopSTASHPV((const COP *)CvSTART(cv))); \
5ac1e9b2 589 \
79072805 590 cx->blk_sub.cv = cv; \
b8f55b69 591 cx->blk_sub.olddepth = CvDEPTH(cv); \
3b21fb5d 592 cx->blk_sub.prevcomppad = PL_comppad; \
ae423868 593 cx->cx_type |= (hasargs) ? CXp_HASARGS : 0; \
5f66b61c 594 cx->blk_sub.retop = NULL; \
1dfbe6b4 595 SvREFCNT_inc_simple_void_NN(cv); \
bb3300d1 596 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
1dfbe6b4 597 PL_tmps_floor = PL_tmps_ix;
b36bdeca 598
4587c532 599#define PUSHSUB_GET_LVALUE_MASK(func) \
777d9014
FC
600 /* If the context is indeterminate, then only the lvalue */ \
601 /* flags that the caller also has are applicable. */ \
4587c532 602 ( \
777d9014
FC
603 (PL_op->op_flags & OPf_WANT) \
604 ? OPpENTERSUB_LVAL_MASK \
605 : !(PL_op->op_private & OPpENTERSUB_LVAL_MASK) \
4587c532
FC
606 ? 0 : (U8)func(aTHX) \
607 )
608
609#define PUSHSUB(cx) \
610 { \
611 U8 phlags = PUSHSUB_GET_LVALUE_MASK(Perl_was_lvalue_sub); \
ee98a1d6 612 PUSHSUB_BASE(cx) \
446d0787 613 cx->blk_u16 = PL_op->op_private & \
0e9700df 614 (phlags|OPpDEREF); \
777d9014 615 }
79072805 616
ee98a1d6
DM
617/* variant for use by OP_DBSTATE, where op_private holds hint bits */
618#define PUSHSUB_DB(cx) \
619 PUSHSUB_BASE(cx) \
446d0787 620 cx->blk_u16 = 0;
ee98a1d6
DM
621
622
10067d9a 623#define PUSHFORMAT(cx, retop) \
f9c764c5
NC
624 cx->blk_format.cv = cv; \
625 cx->blk_format.gv = gv; \
626 cx->blk_format.retop = (retop); \
f9c764c5 627 cx->blk_format.dfoutgv = PL_defoutgv; \
3b21fb5d 628 cx->blk_format.prevcomppad = PL_comppad; \
1956db7e 629 cx->blk_u16 = 0; \
bb3300d1
DM
630 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
631 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
9aa350eb 632 PL_tmps_floor = PL_tmps_ix; \
2c50b7ed 633 SvREFCNT_inc_simple_void_NN(cv); \
f32c7e86 634 CvDEPTH(cv)++; \
f9c764c5 635 SvREFCNT_inc_void(cx->blk_format.dfoutgv)
79072805 636
fad386cb 637/* Restore old @_ */
3db8f154 638#define POP_SAVEARRAY() \
6d4ff0d2 639 STMT_START { \
fad386cb 640 AV *av = GvAV(PL_defgv); \
a8bba7fa 641 GvAV(PL_defgv) = cx->blk_sub.savearray; \
fad386cb 642 SvREFCNT_dec(av); \
6d4ff0d2 643 } STMT_END
6d4ff0d2 644
ecf8e9dd 645/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
8e09340b
GS
646 * leave any (a fast av_clear(ary), basically) */
647#define CLEAR_ARGARRAY(ary) \
648 STMT_START { \
649 AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
9c6bc640 650 AvARRAY(ary) = AvALLOC(ary); \
8e09340b
GS
651 AvFILLp(ary) = -1; \
652 } STMT_END
7766f137 653
88c90157 654#define POPSUB(cx) \
b0d9ce38 655 STMT_START { \
dfe0f39b 656 CX_LEAVE_SCOPE(cx); \
1956db7e
DM
657 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
658 cx->blk_u16 |= CxPOPSUB_DONE; \
88dbe4af
FC
659 RETURN_PROBE(CvNAMED(cx->blk_sub.cv) \
660 ? HEK_KEY(CvNAME_HEK(cx->blk_sub.cv)) \
661 : GvENAME(CvGV(cx->blk_sub.cv)), \
8f629a87 662 CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
3e2413e5
DL
663 CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
664 CopSTASHPV((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
5ac1e9b2 665 \
bafb2adc 666 if (CxHASARGS(cx)) { \
3073d04f 667 AV *av; \
e2657e18
DM
668 assert(AvARRAY(MUTABLE_AV( \
669 PadlistARRAY(CvPADLIST(cx->blk_sub.cv))[ \
670 CvDEPTH(cx->blk_sub.cv)])) == PL_curpad); \
7766f137 671 POP_SAVEARRAY(); \
d8b46c1b 672 /* abandon @_ if it got reified */ \
3073d04f 673 av = MUTABLE_AV(PAD_SVl(0)); \
6e45d846
DM
674 if (UNLIKELY(AvREAL(av))) \
675 clear_defarray(av, 0); \
7766f137 676 else { \
9513529b 677 CLEAR_ARGARRAY(av); \
7766f137 678 } \
79072805 679 } \
1956db7e 680 } \
3b21fb5d
DM
681 PL_comppad = cx->blk_sub.prevcomppad; \
682 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
88c90157
DM
683 CvDEPTH((const CV*)cx->blk_sub.cv) = cx->blk_sub.olddepth; \
684 SvREFCNT_dec_NN(cx->blk_sub.cv); \
c7764d57 685 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
b0d9ce38 686 } STMT_END
79072805
LW
687
688#define POPFORMAT(cx) \
25375124 689 STMT_START { \
dfe0f39b 690 CX_LEAVE_SCOPE(cx); \
1956db7e 691 if (!(cx->blk_u16 & CxPOPSUB_DONE)) { \
25375124
FC
692 CV * const cv = cx->blk_format.cv; \
693 GV * const dfuot = cx->blk_format.dfoutgv; \
1956db7e 694 cx->blk_u16 |= CxPOPSUB_DONE; \
25375124 695 setdefout(dfuot); \
3b21fb5d
DM
696 PL_comppad = cx->blk_format.prevcomppad; \
697 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
2c50b7ed
DM
698 --CvDEPTH(cv); \
699 SvREFCNT_dec_NN(cx->blk_format.cv); \
25375124 700 SvREFCNT_dec_NN(dfuot); \
1956db7e 701 } \
c7764d57 702 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
25375124 703 } STMT_END
79072805
LW
704
705/* eval context */
706struct block_eval {
8e663997
NC
707 OP * retop; /* op to execute on exit from eval */
708 /* Above here is the same for sub, format and eval. */
0f79a09d 709 SV * old_namesv;
79072805 710 OP * old_eval_root;
748a9306 711 SV * cur_text;
2090ab20 712 CV * cv;
abd70938 713 JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
79072805
LW
714};
715
17347a51
NC
716/* If we ever need more than 512 op types, change the shift from 7.
717 blku_gimme is actually also only 2 bits, so could be merged with something.
718*/
719
720#define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x7F)
721#define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7)
85a64632 722
6b75f042 723#define PUSHEVAL(cx,n) \
0f79a09d 724 STMT_START { \
17347a51
NC
725 assert(!(PL_in_eval & ~0x7F)); \
726 assert(!(PL_op->op_type & ~0x1FF)); \
727 cx->blk_u16 = (PL_in_eval & 0x7F) | ((U16)PL_op->op_type << 7); \
bb3300d1 728 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
adcbf118 729 PL_tmps_floor = PL_tmps_ix; \
a0714e2c 730 cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
a8bba7fa 731 cx->blk_eval.old_eval_root = PL_eval_root; \
bdc0bf6f 732 cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
601f1833 733 cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
5f66b61c 734 cx->blk_eval.retop = NULL; \
abd70938 735 cx->blk_eval.cur_top_env = PL_top_env; \
0f79a09d 736 } STMT_END
79072805
LW
737
738#define POPEVAL(cx) \
0f79a09d 739 STMT_START { \
03e489bc 740 CX_LEAVE_SCOPE(cx); \
85a64632
NC
741 PL_in_eval = CxOLD_IN_EVAL(cx); \
742 optype = CxOLD_OP_TYPE(cx); \
7766f137 743 PL_eval_root = cx->blk_eval.old_eval_root; \
d37427bc 744 if (cx->blk_eval.cur_text && SvSCREAM(cx->blk_eval.cur_text)) \
2f995715 745 SvREFCNT_dec_NN(cx->blk_eval.cur_text); \
0f79a09d
GS
746 if (cx->blk_eval.old_namesv) \
747 sv_2mortal(cx->blk_eval.old_namesv); \
c7764d57 748 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
0f79a09d 749 } STMT_END
79072805
LW
750
751/* loop context */
752struct block_loop {
79072805 753 I32 resetsp;
022eaa24 754 LOOP * my_op; /* My op, that contains redo, next and last ops. */
df530c37 755 union { /* different ways of locating the iteration variable */
b52de964
DM
756 SV **svp; /* for lexicals: address of pad slot */
757 GV *gv; /* for package vars */
df530c37 758 } itervar_u;
f0bb9bf7 759 SV *itersave; /* the original iteration var */
493b0a3c 760 union {
d01136d6
BS
761 struct { /* valid if type is LOOP_FOR or LOOP_PLAIN (but {NULL,0})*/
762 AV * ary; /* use the stack if this is NULL */
763 IV ix;
764 } ary;
765 struct { /* valid if type is LOOP_LAZYIV */
766 IV cur;
767 IV end;
768 } lazyiv;
769 struct { /* valid if type if LOOP_LAZYSV */
770 SV * cur;
771 SV * end; /* maxiumum value (or minimum in reverse) */
772 } lazysv;
773 } state_u;
7766f137 774#ifdef USE_ITHREADS
b52de964 775 PAD *oldcomppad; /* needed to map itervar_u.svp during thread clone */
f83b46a0 776#endif
b52de964 777};
f83b46a0 778
9af0df0b
DM
779#define CxITERVAR(c) \
780 (CxPADLOOP(c) \
781 ? (c)->blk_loop.itervar_u.svp \
782 : ((c)->cx_type & CXp_FOR_GV) \
783 ? &GvSV((c)->blk_loop.itervar_u.gv) \
784 : (SV **)&(c)->blk_loop.itervar_u.gv)
f83b46a0 785
b1cf8b36 786#define CxLABEL(c) (0 + CopLABEL((c)->blk_oldcop))
5db1eb8d
BF
787#define CxLABEL_len(c,len) (0 + CopLABEL_len((c)->blk_oldcop, len))
788#define CxLABEL_len_flags(c,len,flags) (0 + CopLABEL_len_flags((c)->blk_oldcop, len, flags))
ae423868 789#define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
1956db7e
DM
790#define CxLVAL(c) (0 + ((c)->blk_u16 & 0xff))
791/* POPSUB has already been performed on this context frame */
792#define CxPOPSUB_DONE 0x100
793
7766f137 794
3b719c58
NC
795#define PUSHLOOP_PLAIN(cx, s) \
796 cx->blk_loop.resetsp = s - PL_stack_base; \
797 cx->blk_loop.my_op = cLOOP; \
d01136d6
BS
798 cx->blk_loop.state_u.ary.ary = NULL; \
799 cx->blk_loop.state_u.ary.ix = 0; \
bb3300d1 800 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
f5319de9
DM
801 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
802 PL_tmps_floor = PL_tmps_ix; \
f0bb9bf7
DM
803 cx->blk_loop.itervar_u.svp = NULL; \
804 cx->blk_loop.itersave = NULL;
3b719c58 805
b52de964
DM
806#ifdef USE_ITHREADS
807# define PUSHLOOP_FOR_setpad(c) (c)->blk_loop.oldcomppad = PL_comppad
808#else
809# define PUSHLOOP_FOR_setpad(c) NOOP
810#endif
811
f0bb9bf7 812#define PUSHLOOP_FOR(cx, ivar, isave, s) \
38a230cb 813 cx->blk_loop.resetsp = s - PL_stack_base; \
022eaa24 814 cx->blk_loop.my_op = cLOOP; \
d01136d6
BS
815 cx->blk_loop.state_u.ary.ary = NULL; \
816 cx->blk_loop.state_u.ary.ix = 0; \
b52de964 817 cx->blk_loop.itervar_u.svp = (SV**)(ivar); \
bb3300d1 818 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
f5319de9
DM
819 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
820 PL_tmps_floor = PL_tmps_ix; \
f0bb9bf7 821 cx->blk_loop.itersave = isave; \
b52de964 822 PUSHLOOP_FOR_setpad(cx);
79072805
LW
823
824#define POPLOOP(cx) \
dfe0f39b 825 CX_LEAVE_SCOPE(cx); \
d01136d6 826 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) { \
2f995715
FC
827 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.cur); \
828 SvREFCNT_dec_NN(cx->blk_loop.state_u.lazysv.end); \
d01136d6 829 } \
f0bb9bf7
DM
830 else if (CxTYPE(cx) == CXt_LOOP_FOR) \
831 SvREFCNT_dec(cx->blk_loop.state_u.ary.ary); \
9af0df0b 832 if (cx->cx_type & (CXp_FOR_PAD|CXp_FOR_GV)) { \
f0bb9bf7 833 SV *cursv; \
d4e2b4d6
DM
834 SV **svp = (cx)->blk_loop.itervar_u.svp; \
835 if ((cx->cx_type & CXp_FOR_GV)) \
f0bb9bf7 836 svp = &GvSV((GV*)svp); \
d4e2b4d6
DM
837 cursv = *svp; \
838 *svp = cx->blk_loop.itersave; \
385bbb12 839 SvREFCNT_dec(cursv); \
f5319de9
DM
840 } \
841 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
79072805 842
0d863452
RH
843/* given/when context */
844struct block_givwhen {
845 OP *leave_op;
b95eccd3 846 SV *defsv_save; /* the original $_ */
0d863452
RH
847};
848
b95eccd3 849#define PUSHWHEN(cx) \
f5319de9
DM
850 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
851 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
852 PL_tmps_floor = PL_tmps_ix; \
0d863452
RH
853 cx->blk_givwhen.leave_op = cLOGOP->op_other;
854
b95eccd3
DM
855#define PUSHGIVEN(cx, orig_var) \
856 PUSHWHEN(cx); \
857 cx->blk_givwhen.defsv_save = orig_var;
858
859#define POPWHEN(cx) \
dfe0f39b 860 CX_LEAVE_SCOPE(cx); \
f5319de9 861 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
b95eccd3
DM
862
863#define POPGIVEN(cx) \
dfe0f39b 864 CX_LEAVE_SCOPE(cx); \
b95eccd3 865 SvREFCNT_dec(GvSV(PL_defgv)); \
f5319de9
DM
866 GvSV(PL_defgv) = cx->blk_givwhen.defsv_save; \
867 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
b95eccd3 868
0d863452 869
c5369ccc
DM
870/* basic block, i.e. pp_enter/leave */
871
dfe0f39b 872#define PUSHBASICBLK(cx) \
c5369ccc
DM
873 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
874 cx->cx_u.cx_blk.blku_old_tmpsfloor = PL_tmps_floor; \
875 PL_tmps_floor = PL_tmps_ix;
876
dfe0f39b
DM
877#define POPBASICBLK(cx) \
878 CX_LEAVE_SCOPE(cx); \
c5369ccc
DM
879 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
880
881
79072805
LW
882/* context common to subroutines, evals and loops */
883struct block {
446d0787 884 U8 blku_type; /* what kind of context this is */
2e0df0e8 885 U8 blku_gimme; /* is this block running in list context? */
17347a51 886 U16 blku_u16; /* used by block_sub and block_eval (so far) */
79072805
LW
887 I32 blku_oldsp; /* stack pointer to copy stuff down to */
888 COP * blku_oldcop; /* old curcop pointer */
79072805
LW
889 I32 blku_oldmarksp; /* mark stack index */
890 I32 blku_oldscopesp; /* scope stack index */
891 PMOP * blku_oldpm; /* values of pattern match vars */
bb3300d1
DM
892 SSize_t blku_old_tmpsfloor; /* saved PL_tmps_floor */
893 I32 blku_old_savestack_ix; /* saved PL_savestack_ix */
79072805
LW
894
895 union {
896 struct block_sub blku_sub;
f9c764c5 897 struct block_format blku_format;
79072805
LW
898 struct block_eval blku_eval;
899 struct block_loop blku_loop;
0d863452 900 struct block_givwhen blku_givwhen;
79072805
LW
901 } blk_u;
902};
903#define blk_oldsp cx_u.cx_blk.blku_oldsp
904#define blk_oldcop cx_u.cx_blk.blku_oldcop
79072805
LW
905#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
906#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
907#define blk_oldpm cx_u.cx_blk.blku_oldpm
908#define blk_gimme cx_u.cx_blk.blku_gimme
446d0787 909#define blk_u16 cx_u.cx_blk.blku_u16
79072805 910#define blk_sub cx_u.cx_blk.blk_u.blku_sub
f9c764c5 911#define blk_format cx_u.cx_blk.blk_u.blku_format
79072805
LW
912#define blk_eval cx_u.cx_blk.blk_u.blku_eval
913#define blk_loop cx_u.cx_blk.blk_u.blku_loop
0d863452 914#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
79072805 915
1c98cc53 916#define DEBUG_CX(action) \
d9f81b50 917 DEBUG_l( \
bb3300d1 918 Perl_deb(aTHX_ "CX %ld %s %s (scope %ld,%ld) (save %ld,%ld) at %s:%d\n",\
1c98cc53
DM
919 (long)cxstack_ix, \
920 action, \
921 PL_block_type[CxTYPE(&cxstack[cxstack_ix])], \
922 (long)PL_scopestack_ix, \
923 (long)(cxstack[cxstack_ix].blk_oldscopesp), \
bb3300d1
DM
924 (long)PL_savestack_ix, \
925 (long)(cxstack[cxstack_ix].cx_u.cx_blk.blku_old_savestack_ix),\
d9f81b50 926 __FILE__, __LINE__));
1c98cc53 927
79072805 928/* Enter a block. */
8990e307 929#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
79072805 930 cx->cx_type = t, \
3280af22
NIS
931 cx->blk_oldsp = sp - PL_stack_base, \
932 cx->blk_oldcop = PL_curcop, \
1aff0e91 933 cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
3280af22 934 cx->blk_oldscopesp = PL_scopestack_ix, \
3280af22 935 cx->blk_oldpm = PL_curpm, \
eb160463 936 cx->blk_gimme = (U8)gimme; \
1c98cc53 937 DEBUG_CX("PUSH");
79072805
LW
938
939/* Exit a block (RETURN and LAST). */
1c98cc53
DM
940#define POPBLOCK(cx,pm) \
941 DEBUG_CX("POP"); \
3280af22
NIS
942 PL_curcop = cx->blk_oldcop, \
943 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
944 PL_scopestack_ix = cx->blk_oldscopesp, \
f7d0774b 945 pm = cx->blk_oldpm;
79072805
LW
946
947/* Continue a block elsewhere (NEXT and REDO). */
1c98cc53
DM
948#define TOPBLOCK(cx) \
949 DEBUG_CX("TOP"); \
950 cx = &cxstack[cxstack_ix], \
1aff0e91 951 PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
3280af22
NIS
952 PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
953 PL_scopestack_ix = cx->blk_oldscopesp, \
1c98cc53 954 PL_curpm = cx->blk_oldpm;
79072805
LW
955
956/* substitution context */
957struct subst {
446d0787 958 U8 sbu_type; /* what kind of context this is */
1ed74d04 959 U8 sbu_rflags;
446d0787 960 U16 sbu_rxtainted; /* matches struct block */
4633a7c4 961 I32 sbu_oldsave;
3c6ef0a5
FC
962 SSize_t sbu_iters;
963 SSize_t sbu_maxiters;
79072805
LW
964 char * sbu_orig;
965 SV * sbu_dstr;
966 SV * sbu_targ;
967 char * sbu_s;
968 char * sbu_m;
969 char * sbu_strend;
c90c0ff4 970 void * sbu_rxres;
c07a80fd 971 REGEXP * sbu_rx;
79072805
LW
972};
973#define sb_iters cx_u.cx_subst.sbu_iters
974#define sb_maxiters cx_u.cx_subst.sbu_maxiters
22e551b9 975#define sb_rflags cx_u.cx_subst.sbu_rflags
4633a7c4 976#define sb_oldsave cx_u.cx_subst.sbu_oldsave
71be2cbc 977#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
79072805
LW
978#define sb_orig cx_u.cx_subst.sbu_orig
979#define sb_dstr cx_u.cx_subst.sbu_dstr
980#define sb_targ cx_u.cx_subst.sbu_targ
981#define sb_s cx_u.cx_subst.sbu_s
982#define sb_m cx_u.cx_subst.sbu_m
983#define sb_strend cx_u.cx_subst.sbu_strend
c90c0ff4 984#define sb_rxres cx_u.cx_subst.sbu_rxres
c07a80fd 985#define sb_rx cx_u.cx_subst.sbu_rx
79072805 986
9c105995
NC
987#ifdef PERL_CORE
988# define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
79072805
LW
989 cx->sb_iters = iters, \
990 cx->sb_maxiters = maxiters, \
22e551b9 991 cx->sb_rflags = r_flags, \
4633a7c4 992 cx->sb_oldsave = oldsave, \
71be2cbc 993 cx->sb_rxtainted = rxtainted, \
79072805
LW
994 cx->sb_orig = orig, \
995 cx->sb_dstr = dstr, \
996 cx->sb_targ = targ, \
997 cx->sb_s = s, \
998 cx->sb_m = m, \
999 cx->sb_strend = strend, \
4608196e 1000 cx->sb_rxres = NULL, \
c07a80fd 1001 cx->sb_rx = rx, \
1ed74d04 1002 cx->cx_type = CXt_SUBST | (once ? CXp_ONCE : 0); \
e22ae1e2 1003 rxres_save(&cx->sb_rxres, rx); \
cf69025f
TC
1004 (void)ReREFCNT_inc(rx); \
1005 SvREFCNT_inc_void_NN(targ)
79072805 1006
9c105995 1007# define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
e22ae1e2 1008 rxres_free(&cx->sb_rxres); \
cf69025f
TC
1009 ReREFCNT_dec(cx->sb_rx); \
1010 SvREFCNT_dec_NN(cx->sb_targ)
9c105995
NC
1011#endif
1012
1013#define CxONCE(cx) ((cx)->cx_type & CXp_ONCE)
79072805
LW
1014
1015struct context {
79072805
LW
1016 union {
1017 struct block cx_blk;
1018 struct subst cx_subst;
1019 } cx_u;
1020};
2e0df0e8 1021#define cx_type cx_u.cx_subst.sbu_type
6b35e009 1022
76753e7f
NC
1023/* If you re-order these, there is also an array of uppercase names in perl.h
1024 and a static array of context names in pp_ctl.c */
3701055e 1025#define CXTYPEMASK 0xf
79072805 1026#define CXt_NULL 0
76753e7f
NC
1027#define CXt_WHEN 1
1028#define CXt_BLOCK 2
1029/* When micro-optimising :-) keep GIVEN next to the LOOPs, as these 5 share a
1030 jump table in pp_ctl.c
1031 The first 4 don't have a 'case' in at least one switch statement in pp_ctl.c
1032*/
1033#define CXt_GIVEN 3
c6fdafd0 1034/* This is first so that CXt_LOOP_FOR|CXt_LOOP_LAZYIV is CXt_LOOP_LAZYIV */
76753e7f
NC
1035#define CXt_LOOP_FOR 4
1036#define CXt_LOOP_PLAIN 5
1037#define CXt_LOOP_LAZYSV 6
1038#define CXt_LOOP_LAZYIV 7
1039#define CXt_SUB 8
1040#define CXt_FORMAT 9
1041#define CXt_EVAL 10
1042#define CXt_SUBST 11
1043/* SUBST doesn't feature in all switch statements. */
79072805 1044
3701055e
NC
1045/* private flags for CXt_SUB and CXt_NULL
1046 However, this is checked in many places which do not check the type, so
1047 this bit needs to be kept clear for most everything else. For reasons I
1048 haven't investigated, it can coexist with CXp_FOR_DEF */
1f27d788
NC
1049#define CXp_MULTICALL 0x10 /* part of a multicall (so don't
1050 tear down context on exit). */
9850bf21 1051
ae423868 1052/* private flags for CXt_SUB and CXt_FORMAT */
1f27d788 1053#define CXp_HASARGS 0x20
b0065247
DM
1054#define CXp_SUB_RE 0x40 /* code called within regex, i.e. (?{}) */
1055#define CXp_SUB_RE_FAKE 0x80 /* fake sub CX for (?{}) in current scope */
ae423868 1056
6b35e009 1057/* private flags for CXt_EVAL */
1f27d788
NC
1058#define CXp_REAL 0x20 /* truly eval'', not a lookalike */
1059#define CXp_TRYBLOCK 0x40 /* eval{}, not eval'' or similar */
6b35e009 1060
7766f137 1061/* private flags for CXt_LOOP */
1f27d788 1062#define CXp_FOR_DEF 0x10 /* foreach using $_ */
d39c26a6 1063#define CXp_FOR_LVREF 0x20 /* foreach using \$var */
9af0df0b
DM
1064#define CXp_FOR_GV 0x40 /* foreach using package var */
1065#define CXp_FOR_PAD 0x80 /* foreach using lexical var */
1066#define CxPADLOOP(c) ((c)->cx_type & CXp_FOR_PAD)
e846cb92 1067
1ed74d04
NC
1068/* private flags for CXt_SUBST */
1069#define CXp_ONCE 0x10 /* What was sbu_once in struct subst */
7766f137 1070
6b35e009 1071#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
76753e7f 1072#define CxTYPE_is_LOOP(c) (((c)->cx_type & 0xC) == 0x4)
9850bf21
RH
1073#define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
1074 == CXp_MULTICALL)
0588a150 1075#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
7766f137 1076 == (CXt_EVAL|CXp_REAL))
0588a150 1077#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
1d76a5c3 1078 == (CXt_EVAL|CXp_TRYBLOCK))
3b719c58
NC
1079#define CxFOREACH(c) (CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN)
1080#define CxFOREACHDEF(c) ((CxTYPE_is_LOOP(c) && CxTYPE(c) != CXt_LOOP_PLAIN) \
1081 && ((c)->cx_type & CXp_FOR_DEF))
6b35e009 1082
109bf713 1083#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
79072805 1084
ccfc67b7
JH
1085/*
1086=head1 "Gimme" Values
1087*/
954c1994
GS
1088
1089/*
1090=for apidoc AmU||G_SCALAR
fbe13c60 1091Used to indicate scalar context. See C<L</GIMME_V>>, C<L</GIMME>>, and
954c1994
GS
1092L<perlcall>.
1093
1094=for apidoc AmU||G_ARRAY
fbe13c60 1095Used to indicate list context. See C<L</GIMME_V>>, C<L</GIMME>> and
954c1994
GS
1096L<perlcall>.
1097
1098=for apidoc AmU||G_VOID
fbe13c60 1099Used to indicate void context. See C<L</GIMME_V>> and L<perlcall>.
954c1994
GS
1100
1101=for apidoc AmU||G_DISCARD
1102Indicates that arguments returned from a callback should be discarded. See
1103L<perlcall>.
1104
1105=for apidoc AmU||G_EVAL
1106
1107Used to force a Perl C<eval> wrapper around a callback. See
1108L<perlcall>.
1109
1110=for apidoc AmU||G_NOARGS
1111
1112Indicates that no arguments are being sent to a callback. See
1113L<perlcall>.
1114
1115=cut
1116*/
1117
2f8edad0
NC
1118#define G_SCALAR 2
1119#define G_ARRAY 3
1120#define G_VOID 1
1121#define G_WANT 3
79072805 1122
864dbfa3 1123/* extra flags for Perl_call_* routines */
2f8edad0 1124#define G_DISCARD 4 /* Call FREETMPS.
b54b4831
NC
1125 Don't change this without consulting the
1126 hash actions codes defined in hv.h */
2f8edad0
NC
1127#define G_EVAL 8 /* Assume eval {} around subroutine call. */
1128#define G_NOARGS 16 /* Don't construct a @_ array. */
7ce09284 1129#define G_KEEPERR 32 /* Warn for errors, don't overwrite $@ */
2f8edad0
NC
1130#define G_NODEBUG 64 /* Disable debugging at toplevel. */
1131#define G_METHOD 128 /* Calling method. */
c40f1585 1132#define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
edb2152a 1133 fold_constants. */
67549bd2
NC
1134#define G_UNDEF_FILL 512 /* Fill the stack with &PL_sv_undef
1135 A special case for UNSHIFT in
1136 Perl_magic_methcall(). */
d1d7a15d
NC
1137#define G_WRITING_TO_STDERR 1024 /* Perl_write_to_stderr() is calling
1138 Perl_magic_methcall(). */
a1941760 1139#define G_RE_REPARSING 0x800 /* compiling a run-time /(?{..})/ */
c106c2be 1140#define G_METHOD_NAMED 4096 /* calling named method, eg without :: or ' */
e336de0d 1141
faef0170
HS
1142/* flag bits for PL_in_eval */
1143#define EVAL_NULL 0 /* not in an eval */
1144#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
1145#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
864dbfa3 1146#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
6dc8a9e4 1147#define EVAL_INREQUIRE 8 /* The code is being required. */
a1941760 1148#define EVAL_RE_REPARSING 0x10 /* eval_sv() called with G_RE_REPARSING */
faef0170 1149
e336de0d
GS
1150/* Support for switching (stack and block) contexts.
1151 * This ensures magic doesn't invalidate local stack and cx pointers.
1152 */
1153
e788e7d3
GS
1154#define PERLSI_UNKNOWN -1
1155#define PERLSI_UNDEF 0
1156#define PERLSI_MAIN 1
1157#define PERLSI_MAGIC 2
1158#define PERLSI_SORT 3
1159#define PERLSI_SIGNAL 4
1160#define PERLSI_OVERLOAD 5
1161#define PERLSI_DESTROY 6
1162#define PERLSI_WARNHOOK 7
1163#define PERLSI_DIEHOOK 8
1164#define PERLSI_REQUIRE 9
e1a10f35 1165#define PERLSI_MULTICALL 10
e336de0d
GS
1166
1167struct stackinfo {
1168 AV * si_stack; /* stack for current runlevel */
1169 PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
9bd87817
NC
1170 struct stackinfo * si_prev;
1171 struct stackinfo * si_next;
e336de0d
GS
1172 I32 si_cxix; /* current context index */
1173 I32 si_cxmax; /* maximum allocated index */
1174 I32 si_type; /* type of runlevel */
ce2f7c3b 1175 I32 si_markoff; /* offset where markstack begins for us.
e336de0d
GS
1176 * currently used only with DEBUGGING,
1177 * but not #ifdef-ed for bincompat */
1178};
1179
1180typedef struct stackinfo PERL_SI;
1181
3280af22
NIS
1182#define cxstack (PL_curstackinfo->si_cxstack)
1183#define cxstack_ix (PL_curstackinfo->si_cxix)
1184#define cxstack_max (PL_curstackinfo->si_cxmax)
e336de0d
GS
1185
1186#ifdef DEBUGGING
ce2f7c3b
GS
1187# define SET_MARK_OFFSET \
1188 PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
e336de0d 1189#else
ce2f7c3b 1190# define SET_MARK_OFFSET NOOP
e336de0d
GS
1191#endif
1192
d3acc0f7 1193#define PUSHSTACKi(type) \
e336de0d 1194 STMT_START { \
3280af22 1195 PERL_SI *next = PL_curstackinfo->si_next; \
1c98cc53
DM
1196 DEBUG_l({ \
1197 int i = 0; PERL_SI *p = PL_curstackinfo; \
1198 while (p) { i++; p = p->si_prev; } \
1199 Perl_deb(aTHX_ "push STACKINFO %d at %s:%d\n", \
1200 i, __FILE__, __LINE__);}) \
e336de0d
GS
1201 if (!next) { \
1202 next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
3280af22
NIS
1203 next->si_prev = PL_curstackinfo; \
1204 PL_curstackinfo->si_next = next; \
e336de0d
GS
1205 } \
1206 next->si_type = type; \
1207 next->si_cxix = -1; \
1208 AvFILLp(next->si_stack) = 0; \
3280af22
NIS
1209 SWITCHSTACK(PL_curstack,next->si_stack); \
1210 PL_curstackinfo = next; \
ce2f7c3b 1211 SET_MARK_OFFSET; \
e336de0d
GS
1212 } STMT_END
1213
e788e7d3 1214#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
d3acc0f7 1215
3095d977
GS
1216/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
1217 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
d3acc0f7 1218#define POPSTACK \
e336de0d 1219 STMT_START { \
39644a26 1220 dSP; \
c4420975 1221 PERL_SI * const prev = PL_curstackinfo->si_prev; \
1c98cc53
DM
1222 DEBUG_l({ \
1223 int i = -1; PERL_SI *p = PL_curstackinfo; \
1224 while (p) { i++; p = p->si_prev; } \
1225 Perl_deb(aTHX_ "pop STACKINFO %d at %s:%d\n", \
1226 i, __FILE__, __LINE__);}) \
e336de0d 1227 if (!prev) { \
3d04513d 1228 Perl_croak_popstack(); \
e336de0d 1229 } \
3280af22 1230 SWITCHSTACK(PL_curstack,prev->si_stack); \
e336de0d 1231 /* don't free prev here, free them all at the END{} */ \
3280af22 1232 PL_curstackinfo = prev; \
e336de0d
GS
1233 } STMT_END
1234
1235#define POPSTACK_TO(s) \
1236 STMT_START { \
3280af22 1237 while (PL_curstack != s) { \
bac4b2ad 1238 dounwind(-1); \
d3acc0f7 1239 POPSTACK; \
bac4b2ad 1240 } \
e336de0d 1241 } STMT_END
923e4eb5
JH
1242
1243#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
1244#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
1245
9850bf21
RH
1246/*
1247=head1 Multicall Functions
1248
1249=for apidoc Ams||dMULTICALL
72d33970 1250Declare local variables for a multicall. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1251
1252=for apidoc Ams||PUSH_MULTICALL
1253Opening bracket for a lightweight callback.
0eda4409 1254See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1255
1256=for apidoc Ams||MULTICALL
72d33970 1257Make a lightweight callback. See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1258
1259=for apidoc Ams||POP_MULTICALL
1260Closing bracket for a lightweight callback.
0eda4409 1261See L<perlcall/LIGHTWEIGHT CALLBACKS>.
9850bf21
RH
1262
1263=cut
1264*/
1265
1266#define dMULTICALL \
1267 SV **newsp; /* set by POPBLOCK */ \
1268 PERL_CONTEXT *cx; \
82f35e8b 1269 CV *multicall_cv; \
9850bf21
RH
1270 OP *multicall_cop; \
1271 bool multicall_oldcatch; \
1272 U8 hasargs = 0 /* used by PUSHSUB */
1273
82f35e8b 1274#define PUSH_MULTICALL(the_cv) \
b0065247 1275 PUSH_MULTICALL_FLAGS(the_cv, 0)
81ed78b2 1276
b0065247
DM
1277/* Like PUSH_MULTICALL, but allows you to specify extra flags
1278 * for the CX stack entry (this isn't part of the public API) */
81ed78b2 1279
b0065247 1280#define PUSH_MULTICALL_FLAGS(the_cv, flags) \
9850bf21 1281 STMT_START { \
0bcc34c2
AL
1282 CV * const _nOnclAshIngNamE_ = the_cv; \
1283 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1284 PADLIST * const padlist = CvPADLIST(cv); \
9850bf21 1285 multicall_oldcatch = CATCH_GET; \
9850bf21 1286 CATCH_SET(TRUE); \
e1a10f35 1287 PUSHSTACKi(PERLSI_MULTICALL); \
b0065247 1288 PUSHBLOCK(cx, (CXt_SUB|CXp_MULTICALL|flags), PL_stack_sp); \
9850bf21 1289 PUSHSUB(cx); \
bb3300d1 1290 cx->cx_u.cx_blk.blku_old_savestack_ix = PL_savestack_ix; \
8ae997c5 1291 SAVEVPTR(PL_op); \
b0065247
DM
1292 if (!(flags & CXp_SUB_RE_FAKE)) \
1293 CvDEPTH(cv)++; \
81ed78b2 1294 if (CvDEPTH(cv) >= 2) { \
9850bf21
RH
1295 PERL_STACK_OVERFLOW_CHECK(); \
1296 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1297 } \
9850bf21 1298 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
82f35e8b 1299 multicall_cv = cv; \
9850bf21
RH
1300 multicall_cop = CvSTART(cv); \
1301 } STMT_END
1302
1303#define MULTICALL \
1304 STMT_START { \
1305 PL_op = multicall_cop; \
1306 CALLRUNOPS(aTHX); \
1307 } STMT_END
1308
1309#define POP_MULTICALL \
1310 STMT_START { \
3d26b81e 1311 cx = &cxstack[cxstack_ix]; \
2c50b7ed 1312 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
39de75fd 1313 /* includes partial unrolled POPSUB(): */ \
dfe0f39b 1314 CX_LEAVE_SCOPE(cx); \
3b21fb5d
DM
1315 PL_comppad = cx->blk_sub.prevcomppad; \
1316 PL_curpad = LIKELY(PL_comppad) ? AvARRAY(PL_comppad) : NULL; \
88c90157 1317 SvREFCNT_dec_NN(multicall_cv); \
4df352a8
DM
1318 /* these two set for backcompat by callers */ \
1319 newsp = PL_stack_base + cx->blk_oldsp; \
1320 gimme = cx->blk_gimme; \
1321 POPBLOCK(cx,PL_curpm); \
1322 cxstack_ix--; \
1bbbfc50 1323 POPSTACK; \
9850bf21 1324 CATCH_SET(multicall_oldcatch); \
1bbbfc50 1325 SPAGAIN; \
9850bf21 1326 } STMT_END
b3ca2e83 1327
81ed78b2
DM
1328/* Change the CV of an already-pushed MULTICALL CxSUB block.
1329 * (this isn't part of the public API) */
1330
b0065247 1331#define CHANGE_MULTICALL_FLAGS(the_cv, flags) \
81ed78b2
DM
1332 STMT_START { \
1333 CV * const _nOnclAshIngNamE_ = the_cv; \
1334 CV * const cv = _nOnclAshIngNamE_; \
b70d5558 1335 PADLIST * const padlist = CvPADLIST(cv); \
81ed78b2
DM
1336 cx = &cxstack[cxstack_ix]; \
1337 assert(cx->cx_type & CXp_MULTICALL); \
2c50b7ed 1338 CvDEPTH(multicall_cv) = cx->blk_sub.olddepth; \
88c90157 1339 SvREFCNT_dec_NN(multicall_cv); \
b0065247 1340 cx->cx_type = (CXt_SUB|CXp_MULTICALL|flags); \
1dfbe6b4
DM
1341 { \
1342 /* save a few things that we don't want PUSHSUB to zap */ \
1343 PAD * const prevcomppad = cx->blk_sub.prevcomppad; \
bb3300d1 1344 SSize_t old_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor; \
1dfbe6b4
DM
1345 SSize_t floor = PL_tmps_floor; \
1346 PUSHSUB(cx); \
1347 /* undo the stuff that PUSHSUB zapped */ \
1348 cx->blk_sub.prevcomppad = prevcomppad ; \
bb3300d1 1349 cx->cx_u.cx_blk.blku_old_tmpsfloor = old_floor; \
1dfbe6b4
DM
1350 PL_tmps_floor = floor; \
1351 } \
b0065247
DM
1352 if (!(flags & CXp_SUB_RE_FAKE)) \
1353 CvDEPTH(cv)++; \
81ed78b2
DM
1354 if (CvDEPTH(cv) >= 2) { \
1355 PERL_STACK_OVERFLOW_CHECK(); \
1356 Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
1357 } \
81ed78b2
DM
1358 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
1359 multicall_cv = cv; \
1360 multicall_cop = CvSTART(cv); \
1361 } STMT_END
b3ca2e83 1362/*
14d04a33 1363 * ex: set ts=8 sts=4 sw=4 et:
b3ca2e83 1364 */