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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | * by Larry Wall and others | |
dd2155a4 DM |
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. | |
4ac71550 TC |
8 | */ |
9 | ||
10 | /* | |
11 | * 'Anyway: there was this Mr. Frodo left an orphan and stranded, as you | |
12 | * might say, among those queer Bucklanders, being brought up anyhow in | |
13 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
14 | * never had fewer than a couple of hundred relations in the place. | |
15 | * Mr. Bilbo never did a kinder deed than when he brought the lad back | |
16 | * to live among decent folk.' --the Gaffer | |
dd2155a4 | 17 | * |
4ac71550 | 18 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
dd2155a4 DM |
19 | */ |
20 | ||
21 | /* XXX DAPM | |
22 | * As of Sept 2002, this file is new and may be in a state of flux for | |
23 | * a while. I've marked things I intent to come back and look at further | |
24 | * with an 'XXX DAPM' comment. | |
25 | */ | |
26 | ||
27 | /* | |
28 | =head1 Pad Data Structures | |
29 | ||
cc76b5cc | 30 | =for apidoc Amx|PADLIST *|CvPADLIST|CV *cv |
166f8a29 | 31 | |
cc76b5cc Z |
32 | CV's can have CvPADLIST(cv) set to point to an AV. This is the CV's |
33 | scratchpad, which stores lexical variables and opcode temporary and | |
34 | per-thread values. | |
dd2155a4 DM |
35 | |
36 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
37 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
38 | executing). Require'd files are simply evals without any outer lexical |
39 | scope. | |
dd2155a4 DM |
40 | |
41 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
42 | but that is really the callers pad (a slot of which is allocated by | |
43 | every entersub). | |
44 | ||
45 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
f3548bdc | 46 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 DM |
47 | The items in the AV are not SVs as for a normal AV, but other AVs: |
48 | ||
49 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
50 | the "static type information" for lexicals. | |
51 | ||
52 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
53 | depth of recursion into the CV. | |
54 | The 0'th slot of a frame AV is an AV which is @_. | |
55 | other entries are storage for variables and op targets. | |
56 | ||
f3548bdc | 57 | Iterating over the names AV iterates over all possible pad |
dd2155a4 DM |
58 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
59 | &PL_sv_undef "names" (see pad_alloc()). | |
60 | ||
61 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
62 | The rest are op targets/GVs/constants which are statically allocated | |
63 | or resolved at compile time. These don't have names by which they | |
64 | can be looked up from Perl code at run time through eval"" like | |
65 | my/our variables can be. Since they can't be looked up by "name" | |
66 | but only by their index allocated at compile time (which is usually | |
67 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
68 | ||
69 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 70 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
71 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
72 | _HIGH). During compilation, these fields may hold the special value | |
73 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
74 | |
75 | COP_SEQ_RANGE_LOW _HIGH | |
76 | ----------------- ----- | |
77 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
78 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
79 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
80 | ||
81 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 82 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 83 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 84 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 85 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 86 | |
b5c19bd7 DM |
87 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
88 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
3441fb63 NC |
89 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
90 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 91 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 92 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
93 | within the parent's pad where the lexical's value is stored, to make |
94 | cloning quicker. | |
dd2155a4 | 95 | |
a6d05634 | 96 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
97 | is a CV representing a possible closure. |
98 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
99 | become so if C<my sub foo {}> is implemented.) | |
100 | ||
71f882da DM |
101 | Note that formats are treated as anon subs, and are cloned each time |
102 | write is called (if necessary). | |
103 | ||
ab8e66c1 | 104 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
e6e7068b DM |
105 | and set on scope exit. This allows the 'Variable $x is not available' warning |
106 | to be generated in evals, such as | |
107 | ||
108 | { my $x = 1; sub f { eval '$x'} } f(); | |
109 | ||
ab8e66c1 | 110 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised' |
d1186544 | 111 | |
cc76b5cc Z |
112 | =for apidoc AmxU|AV *|PL_comppad_name |
113 | ||
114 | During compilation, this points to the array containing the names part | |
115 | of the pad for the currently-compiling code. | |
116 | ||
117 | =for apidoc AmxU|AV *|PL_comppad | |
118 | ||
119 | During compilation, this points to the array containing the values | |
120 | part of the pad for the currently-compiling code. (At runtime a CV may | |
121 | have many such value arrays; at compile time just one is constructed.) | |
122 | At runtime, this points to the array containing the currently-relevant | |
123 | values for the pad for the currently-executing code. | |
124 | ||
125 | =for apidoc AmxU|SV **|PL_curpad | |
126 | ||
127 | Points directly to the body of the L</PL_comppad> array. | |
128 | (I.e., this is C<AvARRAY(PL_comppad)>.) | |
129 | ||
dd2155a4 DM |
130 | =cut |
131 | */ | |
132 | ||
133 | ||
134 | #include "EXTERN.h" | |
135 | #define PERL_IN_PAD_C | |
136 | #include "perl.h" | |
952306ac | 137 | #include "keywords.h" |
dd2155a4 | 138 | |
3441fb63 NC |
139 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
140 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
141 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
142 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 143 | |
3441fb63 NC |
144 | #define PARENT_PAD_INDEX_set(sv,val) \ |
145 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
146 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
147 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 148 | |
cc76b5cc Z |
149 | /* |
150 | =for apidoc mx|void|pad_peg|const char *s | |
151 | ||
152 | When PERL_MAD is enabled, this is a small no-op function that gets called | |
153 | at the start of each pad-related function. It can be breakpointed to | |
154 | track all pad operations. The parameter is a string indicating the type | |
155 | of pad operation being performed. | |
156 | ||
157 | =cut | |
158 | */ | |
159 | ||
1dba731d NC |
160 | #ifdef PERL_MAD |
161 | void pad_peg(const char* s) { | |
790427a5 DM |
162 | static int pegcnt; /* XXX not threadsafe */ |
163 | PERL_UNUSED_ARG(s); | |
7918f24d NC |
164 | |
165 | PERL_ARGS_ASSERT_PAD_PEG; | |
166 | ||
1dba731d NC |
167 | pegcnt++; |
168 | } | |
169 | #endif | |
dd2155a4 DM |
170 | |
171 | /* | |
5b16296c BF |
172 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
173 | and bytes checking. | |
174 | */ | |
175 | ||
76d60a53 NC |
176 | static bool |
177 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
178 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
179 | const char *pv1 = SvPVX_const(sv); | |
180 | STRLEN cur1 = SvCUR(sv); | |
181 | const char *pv2 = pv; | |
182 | STRLEN cur2 = pvlen; | |
183 | if (PL_encoding) { | |
184 | SV* svrecode = NULL; | |
185 | if (SvUTF8(sv)) { | |
186 | svrecode = newSVpvn(pv2, cur2); | |
187 | sv_recode_to_utf8(svrecode, PL_encoding); | |
188 | pv2 = SvPV_const(svrecode, cur2); | |
189 | } | |
190 | else { | |
191 | svrecode = newSVpvn(pv1, cur1); | |
192 | sv_recode_to_utf8(svrecode, PL_encoding); | |
193 | pv1 = SvPV_const(svrecode, cur1); | |
194 | } | |
195 | SvREFCNT_dec(svrecode); | |
196 | } | |
197 | if (flags & SVf_UTF8) | |
198 | return (bytes_cmp_utf8( | |
199 | (const U8*)pv1, cur1, | |
200 | (const U8*)pv2, cur2) == 0); | |
201 | else | |
202 | return (bytes_cmp_utf8( | |
203 | (const U8*)pv2, cur2, | |
204 | (const U8*)pv1, cur1) == 0); | |
205 | } | |
206 | else | |
207 | return ((SvPVX_const(sv) == pv) | |
208 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
209 | } | |
210 | ||
211 | ||
212 | /* | |
cc76b5cc | 213 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 214 | |
cc76b5cc Z |
215 | Create a new padlist, updating the global variables for the |
216 | currently-compiling padlist to point to the new padlist. The following | |
217 | flags can be OR'ed together: | |
dd2155a4 DM |
218 | |
219 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 220 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
221 | padnew_SAVESUB also save extra stuff for start of sub |
222 | ||
223 | =cut | |
224 | */ | |
225 | ||
226 | PADLIST * | |
c7c737cb | 227 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 228 | { |
97aff369 | 229 | dVAR; |
e1ec3a88 | 230 | AV *padlist, *padname, *pad; |
7a6072a8 | 231 | SV **ary; |
dd2155a4 | 232 | |
f3548bdc DM |
233 | ASSERT_CURPAD_LEGAL("pad_new"); |
234 | ||
dd2155a4 DM |
235 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
236 | * vars (based on flags) rather than storing vals + addresses for | |
237 | * each individually. Also see pad_block_start. | |
238 | * XXX DAPM Try to see whether all these conditionals are required | |
239 | */ | |
240 | ||
241 | /* save existing state, ... */ | |
242 | ||
243 | if (flags & padnew_SAVE) { | |
3979c56f | 244 | SAVECOMPPAD(); |
dd2155a4 DM |
245 | SAVESPTR(PL_comppad_name); |
246 | if (! (flags & padnew_CLONE)) { | |
247 | SAVEI32(PL_padix); | |
248 | SAVEI32(PL_comppad_name_fill); | |
249 | SAVEI32(PL_min_intro_pending); | |
250 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 251 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 252 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 253 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
254 | } |
255 | } | |
256 | } | |
257 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
258 | * saved - check at some pt that this is okay */ | |
259 | ||
260 | /* ... create new pad ... */ | |
261 | ||
262 | padlist = newAV(); | |
263 | padname = newAV(); | |
264 | pad = newAV(); | |
265 | ||
266 | if (flags & padnew_CLONE) { | |
267 | /* XXX DAPM I dont know why cv_clone needs it | |
268 | * doing differently yet - perhaps this separate branch can be | |
269 | * dispensed with eventually ??? | |
270 | */ | |
271 | ||
e1ec3a88 | 272 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 273 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 274 | AvREIFY_only(a0); |
dd2155a4 DM |
275 | } |
276 | else { | |
a0714e2c | 277 | av_store(pad, 0, NULL); |
dd2155a4 DM |
278 | } |
279 | ||
280 | AvREAL_off(padlist); | |
7a6072a8 NC |
281 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
282 | array - names, and depth=1. The default for av_store() is to allocate | |
283 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
284 | up, so we inline the allocation of the array here. */ | |
285 | Newx(ary, 2, SV*); | |
286 | AvFILLp(padlist) = 1; | |
287 | AvMAX(padlist) = 1; | |
288 | AvALLOC(padlist) = ary; | |
289 | AvARRAY(padlist) = ary; | |
290 | ary[0] = MUTABLE_SV(padname); | |
291 | ary[1] = MUTABLE_SV(pad); | |
dd2155a4 DM |
292 | |
293 | /* ... then update state variables */ | |
294 | ||
403799bf NC |
295 | PL_comppad_name = padname; |
296 | PL_comppad = pad; | |
297 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
298 | |
299 | if (! (flags & padnew_CLONE)) { | |
300 | PL_comppad_name_fill = 0; | |
301 | PL_min_intro_pending = 0; | |
302 | PL_padix = 0; | |
b5c19bd7 | 303 | PL_cv_has_eval = 0; |
dd2155a4 DM |
304 | } |
305 | ||
306 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 307 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 308 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 309 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
310 | PTR2UV(padname), (UV)flags |
311 | ) | |
312 | ); | |
313 | ||
314 | return (PADLIST*)padlist; | |
315 | } | |
316 | ||
dd2155a4 | 317 | |
c4528262 NC |
318 | /* |
319 | =head1 Embedding Functions | |
320 | ||
321 | =for apidoc cv_undef | |
322 | ||
323 | Clear out all the active components of a CV. This can happen either | |
324 | by an explicit C<undef &foo>, or by the reference count going to zero. | |
325 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
326 | children can still follow the full lexical scope chain. | |
327 | ||
328 | =cut | |
329 | */ | |
330 | ||
331 | void | |
332 | Perl_cv_undef(pTHX_ CV *cv) | |
333 | { | |
334 | dVAR; | |
c2736fce | 335 | const PADLIST *padlist = CvPADLIST(cv); |
c4528262 NC |
336 | |
337 | PERL_ARGS_ASSERT_CV_UNDEF; | |
338 | ||
339 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
340 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
341 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
342 | ); | |
343 | ||
344 | #ifdef USE_ITHREADS | |
345 | if (CvFILE(cv) && !CvISXSUB(cv)) { | |
346 | /* for XSUBs CvFILE point directly to static memory; __FILE__ */ | |
347 | Safefree(CvFILE(cv)); | |
348 | } | |
349 | CvFILE(cv) = NULL; | |
350 | #endif | |
dd2155a4 | 351 | |
c4528262 NC |
352 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
353 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
354 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
355 | ENTER; | |
356 | ||
357 | PAD_SAVE_SETNULLPAD(); | |
358 | ||
359 | op_free(CvROOT(cv)); | |
360 | CvROOT(cv) = NULL; | |
361 | CvSTART(cv) = NULL; | |
362 | LEAVE; | |
363 | } | |
364 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ | |
365 | CvGV_set(cv, NULL); | |
366 | ||
c2736fce NC |
367 | /* This statement and the subsequence if block was pad_undef(). */ |
368 | pad_peg("pad_undef"); | |
369 | ||
370 | if (padlist && !SvIS_FREED(padlist) /* may be during global destruction */ | |
371 | ) { | |
372 | I32 ix; | |
373 | ||
374 | /* Free the padlist associated with a CV. | |
375 | If parts of it happen to be current, we null the relevant PL_*pad* | |
376 | global vars so that we don't have any dangling references left. | |
377 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
378 | subs to the outer of this cv. */ | |
379 | ||
380 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
381 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
382 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
383 | ); | |
384 | ||
385 | /* detach any '&' anon children in the pad; if afterwards they | |
386 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
387 | * bypassing us. */ | |
388 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
389 | * children, or integrate this loop with general cleanup */ | |
390 | ||
391 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
392 | CV * const outercv = CvOUTSIDE(cv); | |
393 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
394 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); | |
395 | SV ** const namepad = AvARRAY(comppad_name); | |
396 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
397 | SV ** const curpad = AvARRAY(comppad); | |
398 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
399 | SV * const namesv = namepad[ix]; | |
400 | if (namesv && namesv != &PL_sv_undef | |
401 | && *SvPVX_const(namesv) == '&') | |
402 | { | |
403 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
404 | U32 inner_rc = SvREFCNT(innercv); | |
405 | assert(inner_rc); | |
406 | namepad[ix] = NULL; | |
407 | SvREFCNT_dec(namesv); | |
408 | ||
409 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
410 | curpad[ix] = NULL; | |
411 | SvREFCNT_dec(innercv); | |
412 | inner_rc--; | |
413 | } | |
414 | ||
415 | /* in use, not just a prototype */ | |
416 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
417 | assert(CvWEAKOUTSIDE(innercv)); | |
418 | /* don't relink to grandfather if he's being freed */ | |
419 | if (outercv && SvREFCNT(outercv)) { | |
420 | CvWEAKOUTSIDE_off(innercv); | |
421 | CvOUTSIDE(innercv) = outercv; | |
422 | CvOUTSIDE_SEQ(innercv) = seq; | |
423 | SvREFCNT_inc_simple_void_NN(outercv); | |
424 | } | |
425 | else { | |
426 | CvOUTSIDE(innercv) = NULL; | |
427 | } | |
428 | } | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
433 | ix = AvFILLp(padlist); | |
aa2f79cf | 434 | while (ix > 0) { |
c2736fce NC |
435 | SV* const sv = AvARRAY(padlist)[ix--]; |
436 | if (sv) { | |
aa2f79cf | 437 | if (sv == (const SV *)PL_comppad) { |
c2736fce NC |
438 | PL_comppad = NULL; |
439 | PL_curpad = NULL; | |
440 | } | |
aa2f79cf | 441 | SvREFCNT_dec(sv); |
c2736fce | 442 | } |
aa2f79cf NC |
443 | } |
444 | { | |
445 | SV *const sv = AvARRAY(padlist)[0]; | |
446 | if (sv == (const SV *)PL_comppad_name) | |
447 | PL_comppad_name = NULL; | |
c2736fce NC |
448 | SvREFCNT_dec(sv); |
449 | } | |
450 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); | |
451 | CvPADLIST(cv) = NULL; | |
452 | } | |
453 | ||
c4528262 NC |
454 | |
455 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
456 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
457 | if (!CvWEAKOUTSIDE(cv)) | |
458 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
459 | CvOUTSIDE(cv) = NULL; | |
460 | } | |
461 | if (CvCONST(cv)) { | |
462 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
463 | CvCONST_off(cv); | |
464 | } | |
465 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
466 | CvXSUB(cv) = NULL; | |
467 | } | |
468 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
469 | * ref status of CvOUTSIDE and CvGV */ | |
470 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC); | |
471 | } | |
dd2155a4 | 472 | |
cc76b5cc Z |
473 | /* |
474 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
475 | ||
1a115e49 FC |
476 | Allocates a place in the currently-compiling |
477 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
478 | then stores a name for that entry. I<namesv> is adopted and becomes the |
479 | name entry; it must already contain the name string and be sufficiently | |
480 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
481 | added to I<namesv>. None of the other |
482 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
483 | is done. Returns the offset of the allocated pad slot. |
484 | ||
485 | =cut | |
486 | */ | |
487 | ||
3291825f | 488 | static PADOFFSET |
cc76b5cc | 489 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f NC |
490 | { |
491 | dVAR; | |
492 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
493 | ||
cc76b5cc | 494 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 495 | |
cc76b5cc | 496 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
497 | |
498 | if (typestash) { | |
499 | assert(SvTYPE(namesv) == SVt_PVMG); | |
500 | SvPAD_TYPED_on(namesv); | |
501 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
502 | } | |
503 | if (ourstash) { | |
504 | SvPAD_OUR_on(namesv); | |
505 | SvOURSTASH_set(namesv, ourstash); | |
506 | SvREFCNT_inc_simple_void_NN(ourstash); | |
507 | } | |
59cfed7d | 508 | else if (flags & padadd_STATE) { |
3291825f NC |
509 | SvPAD_STATE_on(namesv); |
510 | } | |
511 | ||
512 | av_store(PL_comppad_name, offset, namesv); | |
513 | return offset; | |
514 | } | |
515 | ||
dd2155a4 | 516 | /* |
cc76b5cc | 517 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 518 | |
cc76b5cc Z |
519 | Allocates a place in the currently-compiling pad for a named lexical |
520 | variable. Stores the name and other metadata in the name part of the | |
521 | pad, and makes preparations to manage the variable's lexical scoping. | |
522 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 523 | |
cc76b5cc Z |
524 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
525 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
526 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
527 | to a package variable, and this identifies the package. The following | |
528 | flags can be OR'ed together: | |
529 | ||
530 | padadd_OUR redundantly specifies if it's a package var | |
531 | padadd_STATE variable will retain value persistently | |
532 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
533 | |
534 | =cut | |
535 | */ | |
536 | ||
dd2155a4 | 537 | PADOFFSET |
cc76b5cc Z |
538 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
539 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 540 | { |
97aff369 | 541 | dVAR; |
3291825f | 542 | PADOFFSET offset; |
cca43f78 | 543 | SV *namesv; |
e8b34487 | 544 | bool is_utf8; |
dd2155a4 | 545 | |
cc76b5cc | 546 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 547 | |
2435e5d3 | 548 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 549 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
550 | (UV)flags); |
551 | ||
552 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
553 | |
554 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
555 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
556 | } | |
557 | ||
0727928e BF |
558 | sv_setpvn(namesv, namepv, namelen); |
559 | ||
e8b34487 BF |
560 | if (is_utf8) { |
561 | flags |= padadd_UTF8_NAME; | |
562 | SvUTF8_on(namesv); | |
563 | } | |
564 | else | |
565 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 566 | |
59cfed7d | 567 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
2d12d04f | 568 | /* check for duplicate declaration */ |
59cfed7d | 569 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
2d12d04f NC |
570 | } |
571 | ||
2435e5d3 | 572 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
573 | |
574 | /* not yet introduced */ | |
2df5bdd7 DM |
575 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
576 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
577 | |
578 | if (!PL_min_intro_pending) | |
579 | PL_min_intro_pending = offset; | |
580 | PL_max_intro_pending = offset; | |
581 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
582 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
583 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 584 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 585 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 586 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 NC |
587 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
588 | assert(SvPADMY(PL_curpad[offset])); | |
3291825f NC |
589 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
590 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
591 | (long)offset, SvPVX(namesv), |
592 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
593 | |
594 | return offset; | |
595 | } | |
596 | ||
cc76b5cc Z |
597 | /* |
598 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 599 | |
cc76b5cc Z |
600 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
601 | instead of a string/length pair. | |
dd2155a4 | 602 | |
cc76b5cc Z |
603 | =cut |
604 | */ | |
605 | ||
606 | PADOFFSET | |
607 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 608 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
609 | { |
610 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
611 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
612 | } | |
dd2155a4 DM |
613 | |
614 | /* | |
cc76b5cc | 615 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 616 | |
cc76b5cc Z |
617 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
618 | of an SV instead of a string/length pair. | |
619 | ||
620 | =cut | |
621 | */ | |
622 | ||
623 | PADOFFSET | |
624 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
625 | { | |
626 | char *namepv; | |
627 | STRLEN namelen; | |
628 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
629 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
630 | if (SvUTF8(name)) |
631 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
632 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
633 | } | |
634 | ||
635 | /* | |
636 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
637 | ||
638 | Allocates a place in the currently-compiling pad, | |
639 | returning the offset of the allocated pad slot. | |
640 | No name is initially attached to the pad slot. | |
641 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
642 | which will be set in the value SV for the allocated pad entry: | |
643 | ||
644 | SVs_PADMY named lexical variable ("my", "our", "state") | |
645 | SVs_PADTMP unnamed temporary store | |
646 | ||
647 | I<optype> should be an opcode indicating the type of operation that the | |
648 | pad entry is to support. This doesn't affect operational semantics, | |
649 | but is used for debugging. | |
dd2155a4 DM |
650 | |
651 | =cut | |
652 | */ | |
653 | ||
654 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
655 | * or at least rationalise ??? */ | |
6d640399 NC |
656 | /* And flag whether the incoming name is UTF8 or 8 bit? |
657 | Could do this either with the +ve/-ve hack of the HV code, or expanding | |
658 | the flag bits. Either way, this makes proper Unicode safe pad support. | |
6d640399 NC |
659 | NWC |
660 | */ | |
dd2155a4 DM |
661 | |
662 | PADOFFSET | |
663 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
664 | { | |
97aff369 | 665 | dVAR; |
dd2155a4 DM |
666 | SV *sv; |
667 | I32 retval; | |
668 | ||
6136c704 | 669 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
670 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
671 | ||
dd2155a4 DM |
672 | if (AvARRAY(PL_comppad) != PL_curpad) |
673 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
674 | if (PL_pad_reset_pending) | |
675 | pad_reset(); | |
676 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 677 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 678 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
679 | retval = AvFILLp(PL_comppad); |
680 | } | |
681 | else { | |
cc76b5cc Z |
682 | /* For a tmp, scan the pad from PL_padix upwards |
683 | * for a slot which has no name and no active value. | |
684 | */ | |
551405c4 | 685 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 686 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
687 | for (;;) { |
688 | /* | |
689 | * "foreach" index vars temporarily become aliases to non-"my" | |
690 | * values. Thus we must skip, not just pad values that are | |
691 | * marked as current pad values, but also those with names. | |
692 | */ | |
693 | /* HVDS why copy to sv here? we don't seem to use it */ | |
694 | if (++PL_padix <= names_fill && | |
695 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
696 | continue; | |
697 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
698 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
699 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
700 | break; | |
701 | } | |
702 | retval = PL_padix; | |
703 | } | |
704 | SvFLAGS(sv) |= tmptype; | |
705 | PL_curpad = AvARRAY(PL_comppad); | |
706 | ||
707 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
708 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
709 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
710 | PL_op_name[optype])); | |
fd0854ff DM |
711 | #ifdef DEBUG_LEAKING_SCALARS |
712 | sv->sv_debug_optype = optype; | |
713 | sv->sv_debug_inpad = 1; | |
fd0854ff | 714 | #endif |
a212c8b5 | 715 | return (PADOFFSET)retval; |
dd2155a4 DM |
716 | } |
717 | ||
718 | /* | |
cc76b5cc | 719 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 720 | |
cc76b5cc Z |
721 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
722 | for an anonymous function that is lexically scoped inside the | |
723 | currently-compiling function. | |
724 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
725 | to the outer scope is weakened to avoid a reference loop. | |
726 | ||
727 | I<optype> should be an opcode indicating the type of operation that the | |
728 | pad entry is to support. This doesn't affect operational semantics, | |
729 | but is used for debugging. | |
dd2155a4 DM |
730 | |
731 | =cut | |
732 | */ | |
733 | ||
734 | PADOFFSET | |
cc76b5cc | 735 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 | 736 | { |
97aff369 | 737 | dVAR; |
dd2155a4 | 738 | PADOFFSET ix; |
b9f83d2f | 739 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
740 | |
741 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
742 | ||
1dba731d | 743 | pad_peg("add_anon"); |
76f68e9b | 744 | sv_setpvs(name, "&"); |
0d311cdb DM |
745 | /* These two aren't used; just make sure they're not equal to |
746 | * PERL_PADSEQ_INTRO */ | |
747 | COP_SEQ_RANGE_LOW_set(name, 0); | |
748 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 749 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 750 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 751 | /* XXX DAPM use PL_curpad[] ? */ |
cc76b5cc Z |
752 | av_store(PL_comppad, ix, (SV*)func); |
753 | SvPADMY_on((SV*)func); | |
7dafbf52 DM |
754 | |
755 | /* to avoid ref loops, we never have parent + child referencing each | |
756 | * other simultaneously */ | |
cc76b5cc Z |
757 | if (CvOUTSIDE(func)) { |
758 | assert(!CvWEAKOUTSIDE(func)); | |
759 | CvWEAKOUTSIDE_on(func); | |
760 | SvREFCNT_dec(CvOUTSIDE(func)); | |
7dafbf52 | 761 | } |
dd2155a4 DM |
762 | return ix; |
763 | } | |
764 | ||
dd2155a4 | 765 | /* |
cc76b5cc | 766 | =for apidoc m|pad_check_dup|SV *name|U32 flags|const HV *ourstash |
dd2155a4 DM |
767 | |
768 | Check for duplicate declarations: report any of: | |
769 | * a my in the current scope with the same name; | |
770 | * an our (anywhere in the pad) with the same name and the same stash | |
771 | as C<ourstash> | |
772 | C<is_our> indicates that the name to check is an 'our' declaration | |
773 | ||
774 | =cut | |
775 | */ | |
776 | ||
20381b50 | 777 | STATIC void |
cc76b5cc | 778 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 779 | { |
97aff369 | 780 | dVAR; |
53c1dcc0 | 781 | SV **svp; |
dd2155a4 | 782 | PADOFFSET top, off; |
59cfed7d | 783 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 784 | |
7918f24d NC |
785 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
786 | ||
f3548bdc | 787 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 788 | |
59cfed7d | 789 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 790 | |
041457d9 | 791 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
792 | return; /* nothing to check */ |
793 | ||
794 | svp = AvARRAY(PL_comppad_name); | |
795 | top = AvFILLp(PL_comppad_name); | |
796 | /* check the current scope */ | |
797 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
798 | * type ? */ | |
799 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
800 | SV * const sv = svp[off]; |
801 | if (sv | |
dd2155a4 | 802 | && sv != &PL_sv_undef |
ee6cee0c | 803 | && !SvFAKE(sv) |
0d311cdb DM |
804 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
805 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 806 | && sv_eq(name, sv)) |
dd2155a4 | 807 | { |
00b1698f | 808 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 809 | break; /* "our" masking "our" */ |
dd2155a4 | 810 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 | 811 | "\"%s\" variable %"SVf" masks earlier declaration in same %s", |
12bd6ede | 812 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
c541b9b4 | 813 | sv, |
2df5bdd7 DM |
814 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
815 | ? "scope" : "statement")); | |
dd2155a4 DM |
816 | --off; |
817 | break; | |
818 | } | |
819 | } | |
820 | /* check the rest of the pad */ | |
821 | if (is_our) { | |
61c5492a | 822 | while (off > 0) { |
53c1dcc0 AL |
823 | SV * const sv = svp[off]; |
824 | if (sv | |
dd2155a4 | 825 | && sv != &PL_sv_undef |
ee6cee0c | 826 | && !SvFAKE(sv) |
0d311cdb DM |
827 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
828 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 829 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 830 | && sv_eq(name, sv)) |
dd2155a4 DM |
831 | { |
832 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c541b9b4 | 833 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 | 834 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
835 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
836 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
837 | break; |
838 | } | |
61c5492a NC |
839 | --off; |
840 | } | |
dd2155a4 DM |
841 | } |
842 | } | |
843 | ||
844 | ||
dd2155a4 | 845 | /* |
cc76b5cc | 846 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 847 | |
cc76b5cc Z |
848 | Given the name of a lexical variable, find its position in the |
849 | currently-compiling pad. | |
850 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
851 | I<flags> is reserved and must be zero. | |
852 | If it is not in the current pad but appears in the pad of any lexically | |
853 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
854 | Returns the offset in the current pad, | |
855 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
856 | |
857 | =cut | |
858 | */ | |
859 | ||
860 | PADOFFSET | |
cc76b5cc | 861 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 862 | { |
97aff369 | 863 | dVAR; |
b5c19bd7 DM |
864 | SV *out_sv; |
865 | int out_flags; | |
929a0744 | 866 | I32 offset; |
e1ec3a88 | 867 | const AV *nameav; |
929a0744 | 868 | SV **name_svp; |
dd2155a4 | 869 | |
cc76b5cc | 870 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 871 | |
cc76b5cc | 872 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 873 | |
2435e5d3 | 874 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 875 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
876 | (UV)flags); |
877 | ||
e8b34487 BF |
878 | if (flags & padadd_UTF8_NAME) { |
879 | bool is_utf8 = TRUE; | |
880 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
881 | ||
882 | if (is_utf8) | |
883 | flags |= padadd_UTF8_NAME; | |
884 | else | |
885 | flags &= ~padadd_UTF8_NAME; | |
886 | } | |
887 | ||
fbb889c8 BF |
888 | offset = pad_findlex(namepv, namelen, flags, |
889 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 890 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
891 | return offset; |
892 | ||
893 | /* look for an our that's being introduced; this allows | |
894 | * our $foo = 0 unless defined $foo; | |
895 | * to not give a warning. (Yes, this is a hack) */ | |
896 | ||
502c6561 | 897 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 DM |
898 | name_svp = AvARRAY(nameav); |
899 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 900 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
901 | if (namesv && namesv != &PL_sv_undef |
902 | && !SvFAKE(namesv) | |
00b1698f | 903 | && (SvPAD_OUR(namesv)) |
cc76b5cc | 904 | && SvCUR(namesv) == namelen |
e8b34487 BF |
905 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
906 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 907 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
908 | ) |
909 | return offset; | |
910 | } | |
911 | return NOT_IN_PAD; | |
dd2155a4 DM |
912 | } |
913 | ||
e1f795dc | 914 | /* |
cc76b5cc Z |
915 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
916 | ||
917 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
918 | instead of a string/length pair. | |
919 | ||
920 | =cut | |
921 | */ | |
922 | ||
923 | PADOFFSET | |
924 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
925 | { | |
926 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
927 | return pad_findmy_pvn(name, strlen(name), flags); | |
928 | } | |
929 | ||
930 | /* | |
931 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
932 | ||
933 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
934 | of an SV instead of a string/length pair. | |
935 | ||
936 | =cut | |
937 | */ | |
938 | ||
939 | PADOFFSET | |
940 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
941 | { | |
942 | char *namepv; | |
943 | STRLEN namelen; | |
944 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
945 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
946 | if (SvUTF8(name)) |
947 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
948 | return pad_findmy_pvn(namepv, namelen, flags); |
949 | } | |
950 | ||
951 | /* | |
952 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
953 | ||
954 | Find the position of the lexical C<$_> in the pad of the | |
955 | currently-executing function. Returns the offset in the current pad, | |
956 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
957 | the global one should be used instead). | |
958 | L</find_rundefsv> is likely to be more convenient. | |
959 | ||
960 | =cut | |
961 | */ | |
e1f795dc RGS |
962 | |
963 | PADOFFSET | |
29289021 | 964 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 965 | { |
97aff369 | 966 | dVAR; |
e1f795dc RGS |
967 | SV *out_sv; |
968 | int out_flags; | |
fbb889c8 | 969 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 970 | NULL, &out_sv, &out_flags); |
e1f795dc | 971 | } |
dd2155a4 | 972 | |
dd2155a4 | 973 | /* |
cc76b5cc Z |
974 | =for apidoc Am|SV *|find_rundefsv |
975 | ||
976 | Find and return the variable that is named C<$_> in the lexical scope | |
977 | of the currently-executing function. This may be a lexical C<$_>, | |
978 | or will otherwise be the global one. | |
979 | ||
980 | =cut | |
981 | */ | |
789bd863 VP |
982 | |
983 | SV * | |
984 | Perl_find_rundefsv(pTHX) | |
985 | { | |
986 | SV *namesv; | |
987 | int flags; | |
988 | PADOFFSET po; | |
989 | ||
fbb889c8 | 990 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
991 | NULL, &namesv, &flags); |
992 | ||
1979170b | 993 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
994 | return DEFSV; |
995 | ||
996 | return PAD_SVl(po); | |
997 | } | |
998 | ||
999 | /* | |
fbb889c8 | 1000 | =for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|SV** out_name_sv|int *out_flags |
dd2155a4 DM |
1001 | |
1002 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
1003 | in the inner pads if it's found in an outer one. |
1004 | ||
1005 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1006 | cv is the CV in which to start the search, and seq is the current cop_seq | |
1007 | to match against. If warn is true, print appropriate warnings. The out_* | |
1008 | vars return values, and so are pointers to where the returned values | |
1009 | should be stored. out_capture, if non-null, requests that the innermost | |
1010 | instance of the lexical is captured; out_name_sv is set to the innermost | |
1011 | matched namesv or fake namesv; out_flags returns the flags normally | |
1012 | associated with the IVX field of a fake namesv. | |
1013 | ||
1014 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
1015 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 1016 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1017 | the parent pad. |
dd2155a4 DM |
1018 | |
1019 | =cut | |
1020 | */ | |
1021 | ||
b5c19bd7 DM |
1022 | /* the CV has finished being compiled. This is not a sufficient test for |
1023 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1024 | #define CvCOMPILED(cv) CvROOT(cv) | |
1025 | ||
71f882da DM |
1026 | /* the CV does late binding of its lexicals */ |
1027 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
1028 | ||
b5c19bd7 | 1029 | |
dd2155a4 | 1030 | STATIC PADOFFSET |
fbb889c8 | 1031 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1032 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1033 | { |
97aff369 | 1034 | dVAR; |
b5c19bd7 DM |
1035 | I32 offset, new_offset; |
1036 | SV *new_capture; | |
1037 | SV **new_capturep; | |
b64e5050 | 1038 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 1039 | |
7918f24d NC |
1040 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1041 | ||
2435e5d3 BF |
1042 | if (flags & ~padadd_UTF8_NAME) |
1043 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, | |
1044 | (UV)flags); | |
1045 | ||
b5c19bd7 | 1046 | *out_flags = 0; |
a3985cdc | 1047 | |
b5c19bd7 | 1048 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1049 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1050 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1051 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1052 | |
b5c19bd7 | 1053 | /* first, search this pad */ |
dd2155a4 | 1054 | |
b5c19bd7 DM |
1055 | if (padlist) { /* not an undef CV */ |
1056 | I32 fake_offset = 0; | |
502c6561 | 1057 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 1058 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1059 | |
b5c19bd7 | 1060 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 1061 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 1062 | if (namesv && namesv != &PL_sv_undef |
cc76b5cc | 1063 | && SvCUR(namesv) == namelen |
e8b34487 BF |
1064 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1065 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1066 | { |
6012dc80 | 1067 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1068 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1069 | continue; |
1070 | } | |
1071 | /* is seq within the range _LOW to _HIGH ? | |
1072 | * This is complicated by the fact that PL_cop_seqmax | |
1073 | * may have wrapped around at some point */ | |
1074 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1075 | continue; /* not yet introduced */ | |
1076 | ||
1077 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1078 | /* in compiling scope */ | |
1079 | if ( | |
1080 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1081 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1082 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1083 | ) | |
1084 | break; | |
1085 | } | |
1086 | else if ( | |
1087 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1088 | ? | |
1089 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1090 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1091 | ||
1092 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1093 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1094 | ) | |
1095 | break; | |
ee6cee0c DM |
1096 | } |
1097 | } | |
1098 | ||
b5c19bd7 DM |
1099 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1100 | if (offset > 0) { /* not fake */ | |
1101 | fake_offset = 0; | |
1102 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1103 | ||
1104 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1105 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1106 | * ideally, we should detect my's declared within loops | |
1107 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1108 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1109 | * lexes as not multi as viewed from evals. */ |
1110 | ||
1111 | *out_flags = CvANON(cv) ? | |
1112 | PAD_FAKELEX_ANON : | |
1113 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1114 | ? PAD_FAKELEX_MULTI : 0; | |
1115 | ||
1116 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1117 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1118 | PTR2UV(cv), (long)offset, | |
1119 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1120 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1121 | } |
1122 | else { /* fake match */ | |
1123 | offset = fake_offset; | |
1124 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1125 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1126 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1127 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1128 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1129 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1130 | )); |
1131 | } | |
dd2155a4 | 1132 | |
b5c19bd7 | 1133 | /* return the lex? */ |
dd2155a4 | 1134 | |
b5c19bd7 | 1135 | if (out_capture) { |
dd2155a4 | 1136 | |
b5c19bd7 | 1137 | /* our ? */ |
00b1698f | 1138 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1139 | *out_capture = NULL; |
b5c19bd7 DM |
1140 | return offset; |
1141 | } | |
ee6cee0c | 1142 | |
b5c19bd7 DM |
1143 | /* trying to capture from an anon prototype? */ |
1144 | if (CvCOMPILED(cv) | |
1145 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1146 | : *out_flags & PAD_FAKELEX_ANON) | |
1147 | { | |
a2a5de95 NC |
1148 | if (warn) |
1149 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1150 | "Variable \"%"SVf"\" is not available", |
1151 | newSVpvn_flags(namepv, namelen, | |
1152 | SVs_TEMP | | |
1153 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1154 | ||
a0714e2c | 1155 | *out_capture = NULL; |
b5c19bd7 | 1156 | } |
ee6cee0c | 1157 | |
b5c19bd7 DM |
1158 | /* real value */ |
1159 | else { | |
1160 | int newwarn = warn; | |
1161 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1162 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1163 | && warn && ckWARN(WARN_CLOSURE)) { |
1164 | newwarn = 0; | |
1165 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1166 | "Variable \"%"SVf"\" will not stay shared", |
1167 | newSVpvn_flags(namepv, namelen, | |
1168 | SVs_TEMP | | |
1169 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
b5c19bd7 | 1170 | } |
dd2155a4 | 1171 | |
b5c19bd7 DM |
1172 | if (fake_offset && CvANON(cv) |
1173 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1174 | { | |
1175 | SV *n; | |
1176 | /* not yet caught - look further up */ | |
1177 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1178 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1179 | PTR2UV(cv))); | |
1180 | n = *out_name_sv; | |
fbb889c8 | 1181 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1182 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1183 | newwarn, out_capture, out_name_sv, out_flags); |
1184 | *out_name_sv = n; | |
1185 | return offset; | |
dd2155a4 | 1186 | } |
b5c19bd7 | 1187 | |
502c6561 NC |
1188 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
1189 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
1190 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1191 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1192 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1193 | |
d1186544 DM |
1194 | if (SvPADSTALE(*out_capture) |
1195 | && !SvPAD_STATE(name_svp[offset])) | |
1196 | { | |
a2a5de95 | 1197 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e BF |
1198 | "Variable \"%"SVf"\" is not available", |
1199 | newSVpvn_flags(namepv, namelen, | |
1200 | SVs_TEMP | | |
1201 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1202 | *out_capture = NULL; |
dd2155a4 DM |
1203 | } |
1204 | } | |
b5c19bd7 | 1205 | if (!*out_capture) { |
cc76b5cc | 1206 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1207 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1208 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1209 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
1210 | else |
1211 | *out_capture = sv_newmortal(); | |
1212 | } | |
dd2155a4 | 1213 | } |
b5c19bd7 DM |
1214 | |
1215 | return offset; | |
ee6cee0c | 1216 | } |
b5c19bd7 DM |
1217 | } |
1218 | ||
1219 | /* it's not in this pad - try above */ | |
1220 | ||
1221 | if (!CvOUTSIDE(cv)) | |
1222 | return NOT_IN_PAD; | |
9f7d9405 | 1223 | |
b5c19bd7 | 1224 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1225 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1226 | new_capturep = out_capture ? out_capture : |
4608196e | 1227 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1228 | |
fbb889c8 | 1229 | offset = pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, |
b5c19bd7 | 1230 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1231 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1232 | return NOT_IN_PAD; |
9f7d9405 | 1233 | |
b5c19bd7 DM |
1234 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1235 | ||
1236 | /* don't add new fake entries (via eval) to CVs that we have already | |
1237 | * finished compiling, or to undef CVs */ | |
1238 | if (CvCOMPILED(cv) || !padlist) | |
1239 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1240 | ||
1241 | { | |
3291825f | 1242 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1243 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1244 | "good" and only copying flag bits and pointers that it understands. |
1245 | */ | |
1246 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1247 | AV * const ocomppad_name = PL_comppad_name; |
1248 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
1249 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1250 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
1251 | PL_curpad = AvARRAY(PL_comppad); |
1252 | ||
3291825f | 1253 | new_offset |
cc76b5cc | 1254 | = pad_alloc_name(new_namesv, |
59cfed7d | 1255 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1256 | SvPAD_TYPED(*out_name_sv) |
1257 | ? SvSTASH(*out_name_sv) : NULL, | |
1258 | SvOURSTASH(*out_name_sv) | |
1259 | ); | |
1260 | ||
1261 | SvFAKE_on(new_namesv); | |
1262 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1263 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1264 | (long)new_offset, | |
1265 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1266 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1267 | |
809abb02 | 1268 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1269 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1270 | NOOP; /* do nothing */ |
b5c19bd7 | 1271 | } |
71f882da | 1272 | else if (CvLATE(cv)) { |
b5c19bd7 | 1273 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1274 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1275 | CvCLONE_on(cv); |
1276 | } | |
1277 | else { | |
1278 | /* immediate creation - capture outer value right now */ | |
1279 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
1280 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1281 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1282 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1283 | } |
b5c19bd7 | 1284 | *out_name_sv = new_namesv; |
809abb02 | 1285 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1286 | |
1287 | PL_comppad_name = ocomppad_name; | |
1288 | PL_comppad = ocomppad; | |
4608196e | 1289 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1290 | } |
b5c19bd7 | 1291 | return new_offset; |
dd2155a4 DM |
1292 | } |
1293 | ||
fb8a9836 | 1294 | #ifdef DEBUGGING |
cc76b5cc | 1295 | |
dd2155a4 | 1296 | /* |
cc76b5cc | 1297 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1298 | |
cc76b5cc | 1299 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1300 | Use macro PAD_SV instead of calling this function directly. |
1301 | ||
1302 | =cut | |
1303 | */ | |
1304 | ||
dd2155a4 DM |
1305 | SV * |
1306 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1307 | { | |
97aff369 | 1308 | dVAR; |
f3548bdc | 1309 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1310 | |
dd2155a4 DM |
1311 | if (!po) |
1312 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1313 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1314 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1315 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1316 | ); |
1317 | return PL_curpad[po]; | |
1318 | } | |
1319 | ||
dd2155a4 | 1320 | /* |
cc76b5cc | 1321 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1322 | |
cc76b5cc | 1323 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1324 | Use the macro PAD_SETSV() rather than calling this function directly. |
1325 | ||
1326 | =cut | |
1327 | */ | |
1328 | ||
dd2155a4 DM |
1329 | void |
1330 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1331 | { | |
97aff369 | 1332 | dVAR; |
7918f24d NC |
1333 | |
1334 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1335 | ||
f3548bdc | 1336 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1337 | |
1338 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1339 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1340 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1341 | ); |
1342 | PL_curpad[po] = sv; | |
1343 | } | |
dd2155a4 | 1344 | |
cc76b5cc | 1345 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1346 | |
1347 | /* | |
cc76b5cc | 1348 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 DM |
1349 | |
1350 | Update the pad compilation state variables on entry to a new block | |
1351 | ||
1352 | =cut | |
1353 | */ | |
1354 | ||
1355 | /* XXX DAPM perhaps: | |
1356 | * - integrate this in general state-saving routine ??? | |
1357 | * - combine with the state-saving going on in pad_new ??? | |
1358 | * - introduce a new SAVE type that does all this in one go ? | |
1359 | */ | |
1360 | ||
1361 | void | |
1362 | Perl_pad_block_start(pTHX_ int full) | |
1363 | { | |
97aff369 | 1364 | dVAR; |
f3548bdc | 1365 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1366 | SAVEI32(PL_comppad_name_floor); |
1367 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1368 | if (full) | |
1369 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1370 | if (PL_comppad_name_floor < 0) | |
1371 | PL_comppad_name_floor = 0; | |
1372 | SAVEI32(PL_min_intro_pending); | |
1373 | SAVEI32(PL_max_intro_pending); | |
1374 | PL_min_intro_pending = 0; | |
1375 | SAVEI32(PL_comppad_name_fill); | |
1376 | SAVEI32(PL_padix_floor); | |
1377 | PL_padix_floor = PL_padix; | |
1378 | PL_pad_reset_pending = FALSE; | |
1379 | } | |
1380 | ||
dd2155a4 | 1381 | /* |
cc76b5cc | 1382 | =for apidoc m|U32|intro_my |
dd2155a4 DM |
1383 | |
1384 | "Introduce" my variables to visible status. | |
1385 | ||
1386 | =cut | |
1387 | */ | |
1388 | ||
1389 | U32 | |
1390 | Perl_intro_my(pTHX) | |
1391 | { | |
97aff369 | 1392 | dVAR; |
dd2155a4 | 1393 | SV **svp; |
dd2155a4 | 1394 | I32 i; |
6012dc80 | 1395 | U32 seq; |
dd2155a4 | 1396 | |
f3548bdc | 1397 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1398 | if (! PL_min_intro_pending) |
1399 | return PL_cop_seqmax; | |
1400 | ||
1401 | svp = AvARRAY(PL_comppad_name); | |
1402 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1403 | SV * const sv = svp[i]; |
1404 | ||
0d311cdb DM |
1405 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1406 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1407 | { | |
2df5bdd7 | 1408 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1409 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1410 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1411 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1412 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1413 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1414 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1415 | ); |
1416 | } | |
1417 | } | |
6012dc80 DM |
1418 | seq = PL_cop_seqmax; |
1419 | PL_cop_seqmax++; | |
1420 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1421 | PL_cop_seqmax++; | |
dd2155a4 DM |
1422 | PL_min_intro_pending = 0; |
1423 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1424 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1425 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1426 | |
6012dc80 | 1427 | return seq; |
dd2155a4 DM |
1428 | } |
1429 | ||
1430 | /* | |
cc76b5cc | 1431 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1432 | |
1433 | Cleanup at end of scope during compilation: set the max seq number for | |
1434 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1435 | ||
1436 | =cut | |
1437 | */ | |
1438 | ||
1439 | void | |
1440 | Perl_pad_leavemy(pTHX) | |
1441 | { | |
97aff369 | 1442 | dVAR; |
dd2155a4 | 1443 | I32 off; |
551405c4 | 1444 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1445 | |
1446 | PL_pad_reset_pending = FALSE; | |
1447 | ||
f3548bdc | 1448 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1449 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1450 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1451 | const SV * const sv = svp[off]; |
9b387841 NC |
1452 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1453 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1454 | "%"SVf" never introduced", | |
1455 | SVfARG(sv)); | |
dd2155a4 DM |
1456 | } |
1457 | } | |
1458 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1459 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1460 | const SV * const sv = svp[off]; |
2df5bdd7 DM |
1461 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1462 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1463 | { | |
809abb02 | 1464 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1465 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1466 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1467 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1468 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1469 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1470 | ); |
1471 | } | |
1472 | } | |
1473 | PL_cop_seqmax++; | |
6012dc80 DM |
1474 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1475 | PL_cop_seqmax++; | |
dd2155a4 DM |
1476 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1477 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1478 | } | |
1479 | ||
dd2155a4 | 1480 | /* |
cc76b5cc | 1481 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1482 | |
1483 | Abandon the tmp in the current pad at offset po and replace with a | |
1484 | new one. | |
1485 | ||
1486 | =cut | |
1487 | */ | |
1488 | ||
1489 | void | |
1490 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1491 | { | |
97aff369 | 1492 | dVAR; |
f3548bdc | 1493 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1494 | if (!PL_curpad) |
1495 | return; | |
1496 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1497 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1498 | if (!po) | |
1499 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1500 | ||
1501 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1502 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1503 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1504 | ||
1505 | if (PL_curpad[po]) | |
1506 | SvPADTMP_off(PL_curpad[po]); | |
1507 | if (refadjust) | |
1508 | SvREFCNT_dec(PL_curpad[po]); | |
1509 | ||
9ad9869c DM |
1510 | |
1511 | /* if pad tmps aren't shared between ops, then there's no need to | |
1512 | * create a new tmp when an existing op is freed */ | |
1513 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1514 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1515 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1516 | #else |
1517 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1518 | #endif |
dd2155a4 DM |
1519 | if ((I32)po < PL_padix) |
1520 | PL_padix = po - 1; | |
1521 | } | |
1522 | ||
dd2155a4 | 1523 | /* |
cc76b5cc | 1524 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1525 | |
1526 | Mark all the current temporaries for reuse | |
1527 | ||
1528 | =cut | |
1529 | */ | |
1530 | ||
1531 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1532 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1533 | * on the stack by OPs that use them, there are several ways to get an alias | |
1534 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1535 | * We avoid doing this until we can think of a Better Way. | |
1536 | * GSAR 97-10-29 */ | |
1f676739 | 1537 | static void |
82af08ae | 1538 | S_pad_reset(pTHX) |
dd2155a4 | 1539 | { |
97aff369 | 1540 | dVAR; |
dd2155a4 | 1541 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 DM |
1542 | if (AvARRAY(PL_comppad) != PL_curpad) |
1543 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1544 | ||
1545 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1546 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1547 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1548 | (long)PL_padix, (long)PL_padix_floor | |
1549 | ) | |
1550 | ); | |
1551 | ||
1552 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1553 | register I32 po; |
dd2155a4 DM |
1554 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1555 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1556 | SvPADTMP_off(PL_curpad[po]); | |
1557 | } | |
1558 | PL_padix = PL_padix_floor; | |
1559 | } | |
1560 | #endif | |
1561 | PL_pad_reset_pending = FALSE; | |
1562 | } | |
1563 | ||
dd2155a4 | 1564 | /* |
cc76b5cc Z |
1565 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1566 | ||
1567 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1568 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1569 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1570 | the kind of subroutine: | |
dd2155a4 | 1571 | |
cc76b5cc Z |
1572 | padtidy_SUB ordinary subroutine |
1573 | padtidy_SUBCLONE prototype for lexical closure | |
1574 | padtidy_FORMAT format | |
dd2155a4 DM |
1575 | |
1576 | =cut | |
1577 | */ | |
1578 | ||
1579 | /* XXX DAPM surely most of this stuff should be done properly | |
1580 | * at the right time beforehand, rather than going around afterwards | |
1581 | * cleaning up our mistakes ??? | |
1582 | */ | |
1583 | ||
1584 | void | |
1585 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1586 | { | |
27da23d5 | 1587 | dVAR; |
dd2155a4 | 1588 | |
f3548bdc | 1589 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1590 | |
1591 | /* If this CV has had any 'eval-capable' ops planted in it | |
1592 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1593 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1594 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1595 | * the right CvOUTSIDE. | |
1596 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1597 | * executed within it. |
b5c19bd7 DM |
1598 | */ |
1599 | ||
1600 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1601 | const CV *cv; |
b5c19bd7 DM |
1602 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1603 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1604 | break; /* no need to mark already-compiled code */ | |
1605 | if (CvANON(cv)) { | |
1606 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1607 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1608 | CvCLONE_on(cv); | |
1609 | } | |
1610 | } | |
1611 | } | |
1612 | ||
dd2155a4 DM |
1613 | /* extend curpad to match namepad */ |
1614 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1615 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1616 | |
1617 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1618 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1619 | PADOFFSET ix; |
b5c19bd7 | 1620 | |
dd2155a4 DM |
1621 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1622 | SV *namesv; | |
1623 | ||
1624 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1625 | continue; | |
1626 | /* | |
1627 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1628 | * pad are anonymous subs. |
dd2155a4 DM |
1629 | * The rest are created anew during cloning. |
1630 | */ | |
a0714e2c | 1631 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1632 | namesv != &PL_sv_undef && |
b15aece3 | 1633 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1634 | { |
1635 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1636 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1637 | } |
1638 | } | |
1639 | } | |
1640 | else if (type == padtidy_SUB) { | |
1641 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1642 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1643 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1644 | AvREIFY_only(av); |
dd2155a4 DM |
1645 | } |
1646 | ||
4cee4ca8 | 1647 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1648 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1649 | PADOFFSET ix; |
dd2155a4 DM |
1650 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1651 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1652 | continue; | |
adf8f095 | 1653 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1654 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1655 | } else if (!SvFAKE(namep[ix])) { |
1656 | /* This is a work around for how the current implementation of | |
1657 | ?{ } blocks in regexps interacts with lexicals. | |
1658 | ||
1659 | One of our lexicals. | |
1660 | Can't do this on all lexicals, otherwise sub baz() won't | |
1661 | compile in | |
1662 | ||
1663 | my $foo; | |
1664 | ||
1665 | sub bar { ++$foo; } | |
1666 | ||
1667 | sub baz { ++$foo; } | |
1668 | ||
1669 | because completion of compiling &bar calling pad_tidy() | |
1670 | would cause (top level) $foo to be marked as stale, and | |
1671 | "no longer available". */ | |
1672 | SvPADSTALE_on(PL_curpad[ix]); | |
1673 | } | |
dd2155a4 DM |
1674 | } |
1675 | } | |
f3548bdc | 1676 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1677 | } |
1678 | ||
dd2155a4 | 1679 | /* |
cc76b5cc | 1680 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1681 | |
8627550a | 1682 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1683 | |
1684 | =cut | |
1685 | */ | |
1686 | ||
1687 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1688 | void | |
1689 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1690 | { | |
97aff369 | 1691 | dVAR; |
f3548bdc | 1692 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1693 | if (!PL_curpad) |
1694 | return; | |
1695 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1696 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1697 | if (!po) | |
1698 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1699 | ||
1700 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1701 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1702 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1703 | ); | |
1704 | ||
1705 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1706 | SvPADTMP_off(PL_curpad[po]); | |
dd2155a4 DM |
1707 | } |
1708 | if ((I32)po < PL_padix) | |
1709 | PL_padix = po - 1; | |
1710 | } | |
1711 | ||
dd2155a4 | 1712 | /* |
cc76b5cc | 1713 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1714 | |
1715 | Dump the contents of a padlist | |
1716 | ||
1717 | =cut | |
1718 | */ | |
1719 | ||
1720 | void | |
1721 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1722 | { | |
97aff369 | 1723 | dVAR; |
e1ec3a88 AL |
1724 | const AV *pad_name; |
1725 | const AV *pad; | |
dd2155a4 DM |
1726 | SV **pname; |
1727 | SV **ppad; | |
dd2155a4 DM |
1728 | I32 ix; |
1729 | ||
7918f24d NC |
1730 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1731 | ||
dd2155a4 DM |
1732 | if (!padlist) { |
1733 | return; | |
1734 | } | |
502c6561 NC |
1735 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1736 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1737 | pname = AvARRAY(pad_name); |
1738 | ppad = AvARRAY(pad); | |
1739 | Perl_dump_indent(aTHX_ level, file, | |
1740 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1741 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1742 | ); | |
1743 | ||
1744 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1745 | const SV *namesv = pname[ix]; |
dd2155a4 | 1746 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1747 | namesv = NULL; |
dd2155a4 DM |
1748 | } |
1749 | if (namesv) { | |
ee6cee0c DM |
1750 | if (SvFAKE(namesv)) |
1751 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1752 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1753 | (int) ix, |
1754 | PTR2UV(ppad[ix]), | |
1755 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1756 | SvPVX_const(namesv), |
809abb02 NC |
1757 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1758 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1759 | |
ee6cee0c DM |
1760 | ); |
1761 | else | |
1762 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1763 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1764 | (int) ix, |
1765 | PTR2UV(ppad[ix]), | |
1766 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1767 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1768 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1769 | SvPVX_const(namesv) |
ee6cee0c | 1770 | ); |
dd2155a4 DM |
1771 | } |
1772 | else if (full) { | |
1773 | Perl_dump_indent(aTHX_ level+1, file, | |
1774 | "%2d. 0x%"UVxf"<%lu>\n", | |
1775 | (int) ix, | |
1776 | PTR2UV(ppad[ix]), | |
1777 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1778 | ); | |
1779 | } | |
1780 | } | |
1781 | } | |
1782 | ||
cc76b5cc | 1783 | #ifdef DEBUGGING |
dd2155a4 DM |
1784 | |
1785 | /* | |
cc76b5cc | 1786 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1787 | |
1788 | dump the contents of a CV | |
1789 | ||
1790 | =cut | |
1791 | */ | |
1792 | ||
dd2155a4 | 1793 | STATIC void |
e1ec3a88 | 1794 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1795 | { |
97aff369 | 1796 | dVAR; |
53c1dcc0 AL |
1797 | const CV * const outside = CvOUTSIDE(cv); |
1798 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1799 | |
7918f24d NC |
1800 | PERL_ARGS_ASSERT_CV_DUMP; |
1801 | ||
dd2155a4 DM |
1802 | PerlIO_printf(Perl_debug_log, |
1803 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1804 | title, | |
1805 | PTR2UV(cv), | |
1806 | (CvANON(cv) ? "ANON" | |
71f882da | 1807 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1808 | : (cv == PL_main_cv) ? "MAIN" |
1809 | : CvUNIQUE(cv) ? "UNIQUE" | |
1810 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1811 | PTR2UV(outside), | |
1812 | (!outside ? "null" | |
1813 | : CvANON(outside) ? "ANON" | |
1814 | : (outside == PL_main_cv) ? "MAIN" | |
1815 | : CvUNIQUE(outside) ? "UNIQUE" | |
1816 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1817 | ||
1818 | PerlIO_printf(Perl_debug_log, | |
1819 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1820 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1821 | } | |
dd2155a4 | 1822 | |
cc76b5cc | 1823 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1824 | |
1825 | /* | |
cc76b5cc | 1826 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1827 | |
cc76b5cc Z |
1828 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1829 | of the function: its code, pad structure, and other attributes. | |
1830 | The prototype is combined with a capture of outer lexicals to which the | |
1831 | code refers, which are taken from the currently-executing instance of | |
1832 | the immediately surrounding code. | |
dd2155a4 DM |
1833 | |
1834 | =cut | |
1835 | */ | |
1836 | ||
1837 | CV * | |
1838 | Perl_cv_clone(pTHX_ CV *proto) | |
1839 | { | |
27da23d5 | 1840 | dVAR; |
dd2155a4 | 1841 | I32 ix; |
53c1dcc0 | 1842 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1843 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1844 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1845 | SV** const pname = AvARRAY(protopad_name); |
1846 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1847 | const I32 fname = AvFILLp(protopad_name); |
1848 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1849 | CV* cv; |
b5c19bd7 DM |
1850 | SV** outpad; |
1851 | CV* outside; | |
71f882da | 1852 | long depth; |
dd2155a4 | 1853 | |
7918f24d NC |
1854 | PERL_ARGS_ASSERT_CV_CLONE; |
1855 | ||
dd2155a4 DM |
1856 | assert(!CvUNIQUE(proto)); |
1857 | ||
71f882da DM |
1858 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1859 | * to a prototype; we instead want the cloned parent who called us. | |
1860 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1861 | ||
1862 | outside = CvOUTSIDE(proto); | |
1863 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1864 | outside = find_runcv(NULL); | |
1865 | depth = CvDEPTH(outside); | |
1866 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1867 | if (!depth) | |
1868 | depth = 1; | |
b5c19bd7 DM |
1869 | assert(CvPADLIST(outside)); |
1870 | ||
dd2155a4 DM |
1871 | ENTER; |
1872 | SAVESPTR(PL_compcv); | |
1873 | ||
ea726b52 | 1874 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
c794ca97 | 1875 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC); |
dd2155a4 DM |
1876 | CvCLONED_on(cv); |
1877 | ||
dd2155a4 | 1878 | #ifdef USE_ITHREADS |
aed2304a NC |
1879 | CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto) |
1880 | : savepv(CvFILE(proto)); | |
dd2155a4 DM |
1881 | #else |
1882 | CvFILE(cv) = CvFILE(proto); | |
1883 | #endif | |
b3f91e91 | 1884 | CvGV_set(cv,CvGV(proto)); |
c68d9564 | 1885 | CvSTASH_set(cv, CvSTASH(proto)); |
b34c0dd4 | 1886 | OP_REFCNT_LOCK; |
dd2155a4 | 1887 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1888 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1889 | CvSTART(cv) = CvSTART(proto); |
ea726b52 | 1890 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
b5c19bd7 | 1891 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1892 | |
1893 | if (SvPOK(proto)) | |
ad64d0ec | 1894 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 | 1895 | |
b7787f18 | 1896 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1897 | |
b5c19bd7 | 1898 | av_fill(PL_comppad, fpad); |
7aaef02a | 1899 | for (ix = fname; ix > 0; ix--) |
dd2155a4 DM |
1900 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
1901 | ||
dd2155a4 DM |
1902 | PL_curpad = AvARRAY(PL_comppad); |
1903 | ||
71f882da | 1904 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1905 | |
dd2155a4 | 1906 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1907 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1908 | SV *sv = NULL; | |
71f882da | 1909 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1910 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 | 1911 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da | 1912 | assert(sv); |
33894c1a DM |
1913 | /* formats may have an inactive parent, |
1914 | while my $x if $false can leave an active var marked as | |
d1186544 DM |
1915 | stale. And state vars are always available */ |
1916 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { | |
a2a5de95 | 1917 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e | 1918 | "Variable \"%"SVf"\" is not available", namesv); |
a0714e2c | 1919 | sv = NULL; |
71f882da | 1920 | } |
33894c1a | 1921 | else |
f84c484e | 1922 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1923 | } |
71f882da | 1924 | if (!sv) { |
b15aece3 | 1925 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 1926 | if (sigil == '&') |
dd2155a4 | 1927 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 1928 | else if (sigil == '@') |
ad64d0ec | 1929 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 1930 | else if (sigil == '%') |
ad64d0ec | 1931 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1932 | else |
561b68a9 | 1933 | sv = newSV(0); |
235cc2e3 | 1934 | SvPADMY_on(sv); |
0d3b281c DM |
1935 | /* reset the 'assign only once' flag on each state var */ |
1936 | if (SvPAD_STATE(namesv)) | |
1937 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
1938 | } |
1939 | } | |
1940 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 1941 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
1942 | } |
1943 | else { | |
561b68a9 | 1944 | sv = newSV(0); |
dd2155a4 | 1945 | SvPADTMP_on(sv); |
dd2155a4 | 1946 | } |
71f882da | 1947 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1948 | } |
1949 | ||
dd2155a4 DM |
1950 | DEBUG_Xv( |
1951 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1952 | cv_dump(outside, "Outside"); | |
1953 | cv_dump(proto, "Proto"); | |
1954 | cv_dump(cv, "To"); | |
1955 | ); | |
1956 | ||
1957 | LEAVE; | |
1958 | ||
1959 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1960 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1961 | * The prototype was marked as a candiate for const-ization, | |
1962 | * so try to grab the current const value, and if successful, | |
1963 | * turn into a const sub: | |
1964 | */ | |
551405c4 | 1965 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1966 | if (const_sv) { |
1967 | SvREFCNT_dec(cv); | |
bd61b366 | 1968 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
1969 | } |
1970 | else { | |
1971 | CvCONST_off(cv); | |
1972 | } | |
dd2155a4 DM |
1973 | } |
1974 | ||
1975 | return cv; | |
1976 | } | |
1977 | ||
dd2155a4 | 1978 | /* |
cc76b5cc | 1979 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
1980 | |
1981 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1982 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1983 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1984 | |
1985 | =cut | |
1986 | */ | |
1987 | ||
1988 | void | |
1989 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1990 | { | |
97aff369 | 1991 | dVAR; |
dd2155a4 | 1992 | I32 ix; |
502c6561 NC |
1993 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1994 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
1995 | SV ** const namepad = AvARRAY(comppad_name); |
1996 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
1997 | |
1998 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
1999 | PERL_UNUSED_ARG(old_cv); |
2000 | ||
dd2155a4 | 2001 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2002 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 2003 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 2004 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2005 | { |
ea726b52 | 2006 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
2007 | assert(CvWEAKOUTSIDE(innercv)); |
2008 | assert(CvOUTSIDE(innercv) == old_cv); | |
2009 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
2010 | } |
2011 | } | |
2012 | } | |
2013 | ||
2014 | /* | |
cc76b5cc | 2015 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2016 | |
2017 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2018 | this depth, in which case don't bother creating a new one. Then give |
2019 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2020 | |
2021 | =cut | |
2022 | */ | |
2023 | ||
2024 | void | |
26019298 | 2025 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2026 | { |
97aff369 | 2027 | dVAR; |
7918f24d NC |
2028 | |
2029 | PERL_ARGS_ASSERT_PAD_PUSH; | |
2030 | ||
b37c2d43 | 2031 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
2032 | SV** const svp = AvARRAY(padlist); |
2033 | AV* const newpad = newAV(); | |
2034 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2035 | I32 ix = AvFILLp((const AV *)svp[1]); |
2036 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2037 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2038 | AV *av; |
2039 | ||
dd2155a4 DM |
2040 | for ( ;ix > 0; ix--) { |
2041 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 2042 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2043 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2044 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2045 | || sigil == '&') | |
2046 | { | |
dd2155a4 DM |
2047 | /* outer lexical or anon code */ |
2048 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2049 | } | |
2050 | else { /* our own lexical */ | |
26019298 AL |
2051 | SV *sv; |
2052 | if (sigil == '@') | |
ad64d0ec | 2053 | sv = MUTABLE_SV(newAV()); |
26019298 | 2054 | else if (sigil == '%') |
ad64d0ec | 2055 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2056 | else |
561b68a9 | 2057 | sv = newSV(0); |
26019298 | 2058 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2059 | SvPADMY_on(sv); |
2060 | } | |
2061 | } | |
2062 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 2063 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2064 | } |
2065 | else { | |
2066 | /* save temporaries on recursion? */ | |
561b68a9 | 2067 | SV * const sv = newSV(0); |
26019298 | 2068 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2069 | SvPADTMP_on(sv); |
2070 | } | |
2071 | } | |
26019298 | 2072 | av = newAV(); |
ad64d0ec | 2073 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2074 | AvREIFY_only(av); |
26019298 | 2075 | |
ad64d0ec | 2076 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
2077 | AvFILLp(padlist) = depth; |
2078 | } | |
2079 | } | |
b21dc031 | 2080 | |
cc76b5cc Z |
2081 | /* |
2082 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2083 | ||
2084 | Looks up the type of the lexical variable at position I<po> in the | |
2085 | currently-compiling pad. If the variable is typed, the stash of the | |
2086 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2087 | ||
2088 | =cut | |
2089 | */ | |
b21dc031 AL |
2090 | |
2091 | HV * | |
2092 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2093 | { | |
97aff369 | 2094 | dVAR; |
551405c4 | 2095 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 2096 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
2097 | return SvSTASH(*av); |
2098 | } | |
5c284bb0 | 2099 | return NULL; |
b21dc031 | 2100 | } |
66610fdd | 2101 | |
d5b1589c NC |
2102 | #if defined(USE_ITHREADS) |
2103 | ||
2104 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2105 | ||
cc76b5cc Z |
2106 | /* |
2107 | =for apidoc m|AV *|padlist_dup|AV *srcpad|CLONE_PARAMS *param | |
2108 | ||
2109 | Duplicates a pad. | |
2110 | ||
2111 | =cut | |
2112 | */ | |
2113 | ||
d5b1589c | 2114 | AV * |
cc76b5cc | 2115 | Perl_padlist_dup(pTHX_ AV *srcpad, CLONE_PARAMS *param) |
d5b1589c NC |
2116 | { |
2117 | AV *dstpad; | |
2118 | PERL_ARGS_ASSERT_PADLIST_DUP; | |
2119 | ||
2120 | if (!srcpad) | |
2121 | return NULL; | |
2122 | ||
2123 | assert(!AvREAL(srcpad)); | |
6de654a5 NC |
2124 | |
2125 | if (param->flags & CLONEf_COPY_STACKS | |
2126 | || SvREFCNT(AvARRAY(srcpad)[1]) > 1) { | |
2127 | /* XXX padlists are real, but pretend to be not */ | |
2128 | AvREAL_on(srcpad); | |
2129 | dstpad = av_dup_inc(srcpad, param); | |
2130 | AvREAL_off(srcpad); | |
2131 | AvREAL_off(dstpad); | |
2132 | assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1); | |
2133 | } else { | |
2134 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2135 | to build anything other than the first level of pads. */ | |
2136 | ||
2137 | I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]); | |
2138 | AV *pad1; | |
05d04d9c | 2139 | const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0])); |
6de654a5 NC |
2140 | const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1]; |
2141 | SV **oldpad = AvARRAY(srcpad1); | |
2142 | SV **names; | |
2143 | SV **pad1a; | |
2144 | AV *args; | |
2145 | /* look for it in the table first. | |
2146 | I *think* that it shouldn't be possible to find it there. | |
2147 | Well, except for how Perl_sv_compile_2op() "works" :-( */ | |
2148 | dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad); | |
2149 | ||
2150 | if (dstpad) | |
2151 | return dstpad; | |
2152 | ||
2153 | dstpad = newAV(); | |
2154 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
2155 | AvREAL_off(dstpad); | |
2156 | av_extend(dstpad, 1); | |
2157 | AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param)); | |
2158 | names = AvARRAY(AvARRAY(dstpad)[0]); | |
2159 | ||
2160 | pad1 = newAV(); | |
2161 | ||
2162 | av_extend(pad1, ix); | |
2163 | AvARRAY(dstpad)[1] = MUTABLE_SV(pad1); | |
2164 | pad1a = AvARRAY(pad1); | |
2165 | AvFILLp(dstpad) = 1; | |
2166 | ||
2167 | if (ix > -1) { | |
2168 | AvFILLp(pad1) = ix; | |
2169 | ||
2170 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2171 | if (!oldpad[ix]) { |
2172 | pad1a[ix] = NULL; | |
2173 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
2174 | const char sigil = SvPVX_const(names[ix])[0]; | |
2175 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2176 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2177 | || sigil == '&') | |
2178 | { | |
2179 | /* outer lexical or anon code */ | |
2180 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2181 | } | |
2182 | else { /* our own lexical */ | |
adf8f095 NC |
2183 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2184 | /* This is a work around for how the current | |
2185 | implementation of ?{ } blocks in regexps | |
2186 | interacts with lexicals. */ | |
05d04d9c NC |
2187 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2188 | } else { | |
2189 | SV *sv; | |
2190 | ||
2191 | if (sigil == '@') | |
2192 | sv = MUTABLE_SV(newAV()); | |
2193 | else if (sigil == '%') | |
2194 | sv = MUTABLE_SV(newHV()); | |
2195 | else | |
2196 | sv = newSV(0); | |
2197 | pad1a[ix] = sv; | |
2198 | SvPADMY_on(sv); | |
2199 | } | |
2200 | } | |
2201 | } | |
2202 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
2203 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2204 | } | |
2205 | else { | |
2206 | /* save temporaries on recursion? */ | |
2207 | SV * const sv = newSV(0); | |
2208 | pad1a[ix] = sv; | |
2209 | ||
2210 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2211 | FIXTHAT before merging this branch. | |
2212 | (And I know how to) */ | |
2213 | if (SvPADMY(oldpad[ix])) | |
2214 | SvPADMY_on(sv); | |
2215 | else | |
2216 | SvPADTMP_on(sv); | |
2217 | } | |
6de654a5 NC |
2218 | } |
2219 | ||
2220 | if (oldpad[0]) { | |
2221 | args = newAV(); /* Will be @_ */ | |
2222 | AvREIFY_only(args); | |
2223 | pad1a[0] = (SV *)args; | |
2224 | } | |
2225 | } | |
2226 | } | |
d5b1589c NC |
2227 | |
2228 | return dstpad; | |
2229 | } | |
2230 | ||
cc76b5cc | 2231 | #endif /* USE_ITHREADS */ |
d5b1589c | 2232 | |
66610fdd RGS |
2233 | /* |
2234 | * Local variables: | |
2235 | * c-indentation-style: bsd | |
2236 | * c-basic-offset: 4 | |
2237 | * indent-tabs-mode: t | |
2238 | * End: | |
2239 | * | |
37442d52 RGS |
2240 | * ex: set ts=8 sts=4 sw=4 noet: |
2241 | */ |