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9755d405 JH |
1 | /* pad.c |
2 | * | |
31ab2e0d | 3 | * Copyright (C) 2002, 2003, 2004, 2005 by Larry Wall and others |
9755d405 JH |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
8 | * "Anyway: there was this Mr Frodo left an orphan and stranded, as you | |
9 | * might say, among those queer Bucklanders, being brought up anyhow in | |
10 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
11 | * never had fewer than a couple of hundred relations in the place. Mr | |
12 | * Bilbo never did a kinder deed than when he brought the lad back to | |
13 | * live among decent folk." --the Gaffer | |
14 | */ | |
15 | ||
16 | /* XXX DAPM | |
17 | * As of Sept 2002, this file is new and may be in a state of flux for | |
18 | * a while. I've marked things I intent to come back and look at further | |
19 | * with an 'XXX DAPM' comment. | |
20 | */ | |
21 | ||
22 | /* | |
23 | =head1 Pad Data Structures | |
24 | ||
40d34c0d SB |
25 | This file contains the functions that create and manipulate scratchpads, |
26 | which are array-of-array data structures attached to a CV (ie a sub) | |
27 | and which store lexical variables and opcode temporary and per-thread | |
28 | values. | |
29 | ||
9755d405 JH |
30 | =for apidoc m|AV *|CvPADLIST|CV *cv |
31 | CV's can have CvPADLIST(cv) set to point to an AV. | |
32 | ||
33 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
34 | not callable at will and are always thrown away after the eval"" is done | |
35 | executing). | |
36 | ||
37 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
38 | but that is really the callers pad (a slot of which is allocated by | |
39 | every entersub). | |
40 | ||
41 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
d7afa7f5 | 42 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
9755d405 JH |
43 | The items in the AV are not SVs as for a normal AV, but other AVs: |
44 | ||
45 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
46 | the "static type information" for lexicals. | |
47 | ||
48 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
49 | depth of recursion into the CV. | |
50 | The 0'th slot of a frame AV is an AV which is @_. | |
51 | other entries are storage for variables and op targets. | |
52 | ||
53 | During compilation: | |
654c77f7 JH |
54 | C<PL_comppad_name> is set to the names AV. |
55 | C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1. | |
56 | C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)). | |
9755d405 | 57 | |
d7afa7f5 JH |
58 | During execution, C<PL_comppad> and C<PL_curpad> refer to the live |
59 | frame of the currently executing sub. | |
60 | ||
61 | Iterating over the names AV iterates over all possible pad | |
9755d405 JH |
62 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
63 | &PL_sv_undef "names" (see pad_alloc()). | |
64 | ||
65 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
66 | The rest are op targets/GVs/constants which are statically allocated | |
67 | or resolved at compile time. These don't have names by which they | |
68 | can be looked up from Perl code at run time through eval"" like | |
69 | my/our variables can be. Since they can't be looked up by "name" | |
70 | but only by their index allocated at compile time (which is usually | |
71 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
72 | ||
73 | The SVs in the names AV have their PV being the name of the variable. | |
74 | NV+1..IV inclusive is a range of cop_seq numbers for which the name is | |
75 | valid. For typed lexicals name SV is SVt_PVMG and SvSTASH points at the | |
76 | type. For C<our> lexicals, the type is SVt_PVGV, and GvSTASH points at the | |
de7b736d | 77 | stash of the associated global (so that duplicate C<our> declarations in the |
9755d405 JH |
78 | same package can be detected). SvCUR is sometimes hijacked to |
79 | store the generation number during compilation. | |
80 | ||
81 | If SvFAKE is set on the name SV then slot in the frame AVs are | |
d7afa7f5 JH |
82 | a REFCNT'ed references to a lexical from "outside". In this case, |
83 | the name SV does not have a cop_seq range, since it is in scope | |
84 | throughout. | |
9755d405 | 85 | |
654c77f7 | 86 | If the 'name' is '&' the corresponding entry in frame AV |
9755d405 JH |
87 | is a CV representing a possible closure. |
88 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
89 | become so if C<my sub foo {}> is implemented.) | |
90 | ||
be0b3d4b NC |
91 | The flag SVf_PADSTALE is cleared on lexicals each time the my() is executed, |
92 | and set on scope exit. This allows the 'Variable $x is not available' warning | |
93 | to be generated in evals, such as | |
94 | ||
95 | { my $x = 1; sub f { eval '$x'} } f(); | |
96 | ||
9755d405 JH |
97 | =cut |
98 | */ | |
99 | ||
100 | ||
101 | #include "EXTERN.h" | |
102 | #define PERL_IN_PAD_C | |
103 | #include "perl.h" | |
104 | ||
105 | ||
106 | #define PAD_MAX 999999999 | |
107 | ||
108 | ||
109 | ||
110 | /* | |
111 | =for apidoc pad_new | |
112 | ||
113 | Create a new compiling padlist, saving and updating the various global | |
114 | vars at the same time as creating the pad itself. The following flags | |
115 | can be OR'ed together: | |
116 | ||
117 | padnew_CLONE this pad is for a cloned CV | |
118 | padnew_SAVE save old globals | |
119 | padnew_SAVESUB also save extra stuff for start of sub | |
120 | ||
121 | =cut | |
122 | */ | |
123 | ||
124 | PADLIST * | |
125 | Perl_pad_new(pTHX_ int flags) | |
126 | { | |
c05e0e2f | 127 | AV *padlist, *padname, *pad; |
9755d405 | 128 | |
d7afa7f5 JH |
129 | ASSERT_CURPAD_LEGAL("pad_new"); |
130 | ||
9755d405 JH |
131 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
132 | * vars (based on flags) rather than storing vals + addresses for | |
133 | * each individually. Also see pad_block_start. | |
134 | * XXX DAPM Try to see whether all these conditionals are required | |
135 | */ | |
136 | ||
137 | /* save existing state, ... */ | |
138 | ||
139 | if (flags & padnew_SAVE) { | |
140 | SAVECOMPPAD(); | |
141 | SAVESPTR(PL_comppad_name); | |
142 | if (! (flags & padnew_CLONE)) { | |
143 | SAVEI32(PL_padix); | |
144 | SAVEI32(PL_comppad_name_fill); | |
145 | SAVEI32(PL_min_intro_pending); | |
146 | SAVEI32(PL_max_intro_pending); | |
147 | if (flags & padnew_SAVESUB) { | |
148 | SAVEI32(PL_pad_reset_pending); | |
149 | } | |
150 | } | |
151 | } | |
152 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
153 | * saved - check at some pt that this is okay */ | |
154 | ||
155 | /* ... create new pad ... */ | |
156 | ||
157 | padlist = newAV(); | |
158 | padname = newAV(); | |
159 | pad = newAV(); | |
160 | ||
161 | if (flags & padnew_CLONE) { | |
162 | /* XXX DAPM I dont know why cv_clone needs it | |
163 | * doing differently yet - perhaps this separate branch can be | |
164 | * dispensed with eventually ??? | |
165 | */ | |
166 | ||
c05e0e2f | 167 | AV * const a0 = newAV(); /* will be @_ */ |
9755d405 JH |
168 | av_extend(a0, 0); |
169 | av_store(pad, 0, (SV*)a0); | |
170 | AvFLAGS(a0) = AVf_REIFY; | |
171 | } | |
172 | else { | |
173 | #ifdef USE_5005THREADS | |
174 | av_store(padname, 0, newSVpvn("@_", 2)); | |
175 | a0 = newAV(); | |
176 | SvPADMY_on((SV*)a0); /* XXX Needed? */ | |
177 | av_store(pad, 0, (SV*)a0); | |
178 | #else | |
179 | av_store(pad, 0, Nullsv); | |
180 | #endif /* USE_THREADS */ | |
181 | } | |
182 | ||
183 | AvREAL_off(padlist); | |
184 | av_store(padlist, 0, (SV*)padname); | |
185 | av_store(padlist, 1, (SV*)pad); | |
186 | ||
187 | /* ... then update state variables */ | |
188 | ||
189 | PL_comppad_name = (AV*)(*av_fetch(padlist, 0, FALSE)); | |
190 | PL_comppad = (AV*)(*av_fetch(padlist, 1, FALSE)); | |
191 | PL_curpad = AvARRAY(PL_comppad); | |
192 | ||
193 | if (! (flags & padnew_CLONE)) { | |
194 | PL_comppad_name_fill = 0; | |
195 | PL_min_intro_pending = 0; | |
196 | PL_padix = 0; | |
197 | } | |
198 | ||
199 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
200 | "Pad 0x%"UVxf"[0x%"UVxf"] new: padlist=0x%"UVxf | |
201 | " name=0x%"UVxf" flags=0x%"UVxf"\n", | |
202 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(padlist), | |
203 | PTR2UV(padname), (UV)flags | |
204 | ) | |
205 | ); | |
206 | ||
207 | return (PADLIST*)padlist; | |
208 | } | |
209 | ||
210 | /* | |
211 | =for apidoc pad_undef | |
212 | ||
213 | Free the padlist associated with a CV. | |
214 | If parts of it happen to be current, we null the relevant | |
215 | PL_*pad* global vars so that we don't have any dangling references left. | |
216 | We also repoint the CvOUTSIDE of any about-to-be-orphaned | |
d7afa7f5 JH |
217 | inner subs to the outer of this cv. |
218 | ||
219 | (This function should really be called pad_free, but the name was already | |
220 | taken) | |
9755d405 JH |
221 | |
222 | =cut | |
223 | */ | |
224 | ||
225 | void | |
d7afa7f5 | 226 | Perl_pad_undef(pTHX_ CV* cv) |
9755d405 JH |
227 | { |
228 | I32 ix; | |
c05e0e2f | 229 | const PADLIST *padlist = CvPADLIST(cv); |
9755d405 JH |
230 | |
231 | if (!padlist) | |
232 | return; | |
233 | if (!SvREFCNT(CvPADLIST(cv))) /* may be during global destruction */ | |
234 | return; | |
235 | ||
236 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
237 | "Pad undef: padlist=0x%"UVxf"\n" , PTR2UV(padlist)) | |
238 | ); | |
239 | ||
d7afa7f5 JH |
240 | /* detach any '&' anon children in the pad; if afterwards they |
241 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
242 | * bypassing us. */ | |
243 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
244 | * children, or integrate this loop with general cleanup */ | |
9755d405 | 245 | |
d7afa7f5 JH |
246 | if (!PL_dirty) { /* don't bother during global destruction */ |
247 | CV *outercv = CvOUTSIDE(cv); | |
c05e0e2f | 248 | const U32 seq = CvOUTSIDE_SEQ(cv); |
9755d405 JH |
249 | AV *comppad_name = (AV*)AvARRAY(padlist)[0]; |
250 | SV **namepad = AvARRAY(comppad_name); | |
251 | AV *comppad = (AV*)AvARRAY(padlist)[1]; | |
252 | SV **curpad = AvARRAY(comppad); | |
253 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
254 | SV *namesv = namepad[ix]; | |
255 | if (namesv && namesv != &PL_sv_undef | |
d7afa7f5 | 256 | && *SvPVX(namesv) == '&') |
9755d405 | 257 | { |
1f49be52 | 258 | CV * const innercv = (CV*)curpad[ix]; |
d7afa7f5 JH |
259 | namepad[ix] = Nullsv; |
260 | SvREFCNT_dec(namesv); | |
1896a75e NC |
261 | |
262 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
263 | curpad[ix] = Nullsv; | |
264 | SvREFCNT_dec(innercv); | |
265 | } | |
d7afa7f5 | 266 | if (SvREFCNT(innercv) /* in use, not just a prototype */ |
9755d405 JH |
267 | && CvOUTSIDE(innercv) == cv) |
268 | { | |
d7afa7f5 | 269 | assert(CvWEAKOUTSIDE(innercv)); |
d211ebfa JH |
270 | /* don't relink to grandfather if he's being freed */ |
271 | if (outercv && SvREFCNT(outercv)) { | |
272 | CvWEAKOUTSIDE_off(innercv); | |
273 | CvOUTSIDE(innercv) = outercv; | |
274 | CvOUTSIDE_SEQ(innercv) = seq; | |
1f49be52 | 275 | (void)SvREFCNT_inc(outercv); |
d211ebfa JH |
276 | } |
277 | else { | |
278 | CvOUTSIDE(innercv) = Nullcv; | |
279 | } | |
280 | ||
9755d405 | 281 | } |
d211ebfa | 282 | |
9755d405 JH |
283 | } |
284 | } | |
285 | } | |
d7afa7f5 | 286 | |
9755d405 JH |
287 | ix = AvFILLp(padlist); |
288 | while (ix >= 0) { | |
289 | SV* sv = AvARRAY(padlist)[ix--]; | |
290 | if (!sv) | |
291 | continue; | |
292 | if (sv == (SV*)PL_comppad_name) | |
293 | PL_comppad_name = Nullav; | |
294 | else if (sv == (SV*)PL_comppad) { | |
d7afa7f5 | 295 | PL_comppad = Null(PAD*); |
9755d405 JH |
296 | PL_curpad = Null(SV**); |
297 | } | |
298 | SvREFCNT_dec(sv); | |
299 | } | |
300 | SvREFCNT_dec((SV*)CvPADLIST(cv)); | |
301 | CvPADLIST(cv) = Null(PADLIST*); | |
302 | } | |
303 | ||
304 | ||
305 | ||
306 | ||
307 | /* | |
308 | =for apidoc pad_add_name | |
309 | ||
310 | Create a new name in the current pad at the specified offset. | |
311 | If C<typestash> is valid, the name is for a typed lexical; set the | |
312 | name's stash to that value. | |
313 | If C<ourstash> is valid, it's an our lexical, set the name's | |
314 | GvSTASH to that value | |
315 | ||
316 | Also, if the name is @.. or %.., create a new array or hash for that slot | |
317 | ||
318 | If fake, it means we're cloning an existing entry | |
319 | ||
320 | =cut | |
321 | */ | |
322 | ||
323 | /* | |
324 | * XXX DAPM this doesn't seem the right place to create a new array/hash. | |
325 | * Whatever we do, we should be consistent - create scalars too, and | |
326 | * create even if fake. Really need to integrate better the whole entry | |
327 | * creation business - when + where does the name and value get created? | |
328 | */ | |
329 | ||
330 | PADOFFSET | |
331 | Perl_pad_add_name(pTHX_ char *name, HV* typestash, HV* ourstash, bool fake) | |
332 | { | |
333 | PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
334 | SV* namesv = NEWSV(1102, 0); | |
9755d405 | 335 | |
d7afa7f5 JH |
336 | ASSERT_CURPAD_ACTIVE("pad_add_name"); |
337 | ||
9755d405 JH |
338 | |
339 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
d7afa7f5 JH |
340 | "Pad addname: %ld \"%s\"%s\n", |
341 | (long)offset, name, (fake ? " FAKE" : "") | |
9755d405 JH |
342 | ) |
343 | ); | |
344 | ||
345 | sv_upgrade(namesv, ourstash ? SVt_PVGV : typestash ? SVt_PVMG : SVt_PVNV); | |
346 | sv_setpv(namesv, name); | |
347 | ||
348 | if (typestash) { | |
349 | SvFLAGS(namesv) |= SVpad_TYPED; | |
a8dc4fe8 | 350 | SvSTASH_set(namesv, (HV*)SvREFCNT_inc((SV*) typestash)); |
9755d405 JH |
351 | } |
352 | if (ourstash) { | |
353 | SvFLAGS(namesv) |= SVpad_OUR; | |
354 | GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*) ourstash); | |
355 | } | |
356 | ||
357 | av_store(PL_comppad_name, offset, namesv); | |
9755d405 JH |
358 | if (fake) |
359 | SvFAKE_on(namesv); | |
360 | else { | |
d7afa7f5 | 361 | /* not yet introduced */ |
0da6cfda SP |
362 | SvNV_set(namesv, (NV)PAD_MAX); /* min */ |
363 | SvIV_set(namesv, 0); /* max */ | |
d7afa7f5 | 364 | |
9755d405 JH |
365 | if (!PL_min_intro_pending) |
366 | PL_min_intro_pending = offset; | |
367 | PL_max_intro_pending = offset; | |
d7afa7f5 JH |
368 | /* XXX DAPM since slot has been allocated, replace |
369 | * av_store with PL_curpad[offset] ? */ | |
9755d405 JH |
370 | if (*name == '@') |
371 | av_store(PL_comppad, offset, (SV*)newAV()); | |
372 | else if (*name == '%') | |
373 | av_store(PL_comppad, offset, (SV*)newHV()); | |
374 | SvPADMY_on(PL_curpad[offset]); | |
375 | } | |
376 | ||
377 | return offset; | |
378 | } | |
379 | ||
380 | ||
381 | ||
382 | ||
383 | /* | |
384 | =for apidoc pad_alloc | |
385 | ||
386 | Allocate a new my or tmp pad entry. For a my, simply push a null SV onto | |
387 | the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards | |
de7b736d | 388 | for a slot which has no name and no active value. |
9755d405 JH |
389 | |
390 | =cut | |
391 | */ | |
392 | ||
393 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
394 | * or at least rationalise ??? */ | |
395 | ||
396 | ||
397 | PADOFFSET | |
398 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
399 | { | |
400 | SV *sv; | |
401 | I32 retval; | |
402 | ||
d7afa7f5 JH |
403 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
404 | ||
9755d405 JH |
405 | if (AvARRAY(PL_comppad) != PL_curpad) |
406 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
407 | if (PL_pad_reset_pending) | |
408 | pad_reset(); | |
409 | if (tmptype & SVs_PADMY) { | |
410 | do { | |
411 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); | |
412 | } while (SvPADBUSY(sv)); /* need a fresh one */ | |
413 | retval = AvFILLp(PL_comppad); | |
414 | } | |
415 | else { | |
416 | SV **names = AvARRAY(PL_comppad_name); | |
c05e0e2f | 417 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
9755d405 JH |
418 | for (;;) { |
419 | /* | |
420 | * "foreach" index vars temporarily become aliases to non-"my" | |
421 | * values. Thus we must skip, not just pad values that are | |
422 | * marked as current pad values, but also those with names. | |
423 | */ | |
424 | /* HVDS why copy to sv here? we don't seem to use it */ | |
425 | if (++PL_padix <= names_fill && | |
426 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
427 | continue; | |
428 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
429 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
430 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
431 | break; | |
432 | } | |
433 | retval = PL_padix; | |
434 | } | |
435 | SvFLAGS(sv) |= tmptype; | |
436 | PL_curpad = AvARRAY(PL_comppad); | |
437 | ||
438 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
439 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
440 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
441 | PL_op_name[optype])); | |
442 | return (PADOFFSET)retval; | |
443 | } | |
444 | ||
445 | /* | |
446 | =for apidoc pad_add_anon | |
447 | ||
448 | Add an anon code entry to the current compiling pad | |
449 | ||
450 | =cut | |
451 | */ | |
452 | ||
453 | PADOFFSET | |
454 | Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type) | |
455 | { | |
456 | PADOFFSET ix; | |
457 | SV* name; | |
458 | ||
459 | name = NEWSV(1106, 0); | |
460 | sv_upgrade(name, SVt_PVNV); | |
461 | sv_setpvn(name, "&", 1); | |
0da6cfda SP |
462 | SvIV_set(name, -1); |
463 | SvNV_set(name, 1); | |
9755d405 JH |
464 | ix = pad_alloc(op_type, SVs_PADMY); |
465 | av_store(PL_comppad_name, ix, name); | |
d7afa7f5 | 466 | /* XXX DAPM use PL_curpad[] ? */ |
9755d405 JH |
467 | av_store(PL_comppad, ix, sv); |
468 | SvPADMY_on(sv); | |
d7afa7f5 JH |
469 | |
470 | /* to avoid ref loops, we never have parent + child referencing each | |
471 | * other simultaneously */ | |
472 | if (CvOUTSIDE((CV*)sv)) { | |
473 | assert(!CvWEAKOUTSIDE((CV*)sv)); | |
474 | CvWEAKOUTSIDE_on((CV*)sv); | |
475 | SvREFCNT_dec(CvOUTSIDE((CV*)sv)); | |
476 | } | |
9755d405 JH |
477 | return ix; |
478 | } | |
479 | ||
480 | ||
481 | ||
482 | /* | |
483 | =for apidoc pad_check_dup | |
484 | ||
485 | Check for duplicate declarations: report any of: | |
486 | * a my in the current scope with the same name; | |
487 | * an our (anywhere in the pad) with the same name and the same stash | |
488 | as C<ourstash> | |
489 | C<is_our> indicates that the name to check is an 'our' declaration | |
490 | ||
491 | =cut | |
492 | */ | |
493 | ||
494 | /* XXX DAPM integrate this into pad_add_name ??? */ | |
495 | ||
496 | void | |
497 | Perl_pad_check_dup(pTHX_ char *name, bool is_our, HV *ourstash) | |
498 | { | |
499 | SV **svp, *sv; | |
500 | PADOFFSET top, off; | |
501 | ||
d7afa7f5 | 502 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
9755d405 JH |
503 | if (!ckWARN(WARN_MISC) || AvFILLp(PL_comppad_name) < 0) |
504 | return; /* nothing to check */ | |
505 | ||
506 | svp = AvARRAY(PL_comppad_name); | |
507 | top = AvFILLp(PL_comppad_name); | |
508 | /* check the current scope */ | |
509 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
510 | * type ? */ | |
511 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
512 | if ((sv = svp[off]) | |
513 | && sv != &PL_sv_undef | |
d7afa7f5 | 514 | && !SvFAKE(sv) |
9755d405 JH |
515 | && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0) |
516 | && (!is_our | |
517 | || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)) | |
518 | && strEQ(name, SvPVX(sv))) | |
519 | { | |
520 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
521 | "\"%s\" variable %s masks earlier declaration in same %s", | |
522 | (is_our ? "our" : "my"), | |
523 | name, | |
524 | (SvIVX(sv) == PAD_MAX ? "scope" : "statement")); | |
525 | --off; | |
526 | break; | |
527 | } | |
528 | } | |
529 | /* check the rest of the pad */ | |
530 | if (is_our) { | |
531 | do { | |
532 | if ((sv = svp[off]) | |
533 | && sv != &PL_sv_undef | |
d7afa7f5 | 534 | && !SvFAKE(sv) |
9755d405 JH |
535 | && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0) |
536 | && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash) | |
537 | && strEQ(name, SvPVX(sv))) | |
538 | { | |
539 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
540 | "\"our\" variable %s redeclared", name); | |
541 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
542 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
543 | break; | |
544 | } | |
545 | } while ( off-- > 0 ); | |
546 | } | |
547 | } | |
548 | ||
549 | ||
550 | ||
551 | /* | |
552 | =for apidoc pad_findmy | |
553 | ||
554 | Given a lexical name, try to find its offset, first in the current pad, | |
555 | or failing that, in the pads of any lexically enclosing subs (including | |
556 | the complications introduced by eval). If the name is found in an outer pad, | |
557 | then a fake entry is added to the current pad. | |
558 | Returns the offset in the current pad, or NOT_IN_PAD on failure. | |
559 | ||
560 | =cut | |
561 | */ | |
562 | ||
563 | PADOFFSET | |
564 | Perl_pad_findmy(pTHX_ char *name) | |
565 | { | |
566 | I32 off; | |
d7afa7f5 | 567 | I32 fake_off = 0; |
606812b8 | 568 | I32 our_off = 0; |
9755d405 JH |
569 | SV *sv; |
570 | SV **svp = AvARRAY(PL_comppad_name); | |
571 | U32 seq = PL_cop_seqmax; | |
9755d405 | 572 | |
d7afa7f5 | 573 | ASSERT_CURPAD_ACTIVE("pad_findmy"); |
9755d405 JH |
574 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, "Pad findmy: \"%s\"\n", name)); |
575 | ||
576 | #ifdef USE_5005THREADS | |
577 | /* | |
578 | * Special case to get lexical (and hence per-thread) @_. | |
579 | * XXX I need to find out how to tell at parse-time whether use | |
580 | * of @_ should refer to a lexical (from a sub) or defgv (global | |
581 | * scope and maybe weird sub-ish things like formats). See | |
582 | * startsub in perly.y. It's possible that @_ could be lexical | |
583 | * (at least from subs) even in non-threaded perl. | |
584 | */ | |
585 | if (strEQ(name, "@_")) | |
586 | return 0; /* success. (NOT_IN_PAD indicates failure) */ | |
587 | #endif /* USE_5005THREADS */ | |
588 | ||
589 | /* The one we're looking for is probably just before comppad_name_fill. */ | |
590 | for (off = AvFILLp(PL_comppad_name); off > 0; off--) { | |
d7afa7f5 JH |
591 | sv = svp[off]; |
592 | if (!sv || sv == &PL_sv_undef || !strEQ(SvPVX(sv), name)) | |
593 | continue; | |
594 | if (SvFAKE(sv)) { | |
595 | /* we'll use this later if we don't find a real entry */ | |
596 | fake_off = off; | |
597 | continue; | |
598 | } | |
599 | else { | |
91ca9d19 | 600 | if ( seq > U_32(SvNVX(sv)) /* min */ |
d7afa7f5 JH |
601 | && seq <= (U32)SvIVX(sv)) /* max */ |
602 | return off; | |
606812b8 | 603 | else if ((SvFLAGS(sv) & SVpad_OUR) |
91ca9d19 | 604 | && U_32(SvNVX(sv)) == PAD_MAX) /* min */ |
606812b8 DM |
605 | { |
606 | /* look for an our that's being introduced; this allows | |
607 | * our $foo = 0 unless defined $foo; | |
608 | * to not give a warning. (Yes, this is a hack) */ | |
609 | our_off = off; | |
610 | } | |
9755d405 JH |
611 | } |
612 | } | |
d7afa7f5 JH |
613 | if (fake_off) |
614 | return fake_off; | |
9755d405 JH |
615 | |
616 | /* See if it's in a nested scope */ | |
d7afa7f5 | 617 | off = pad_findlex(name, 0, PL_compcv); |
606812b8 DM |
618 | if (off) /* pad_findlex returns 0 for failure...*/ |
619 | return off; | |
620 | if (our_off) | |
621 | return our_off; | |
622 | return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */ | |
9755d405 | 623 | |
9755d405 JH |
624 | } |
625 | ||
626 | ||
627 | ||
628 | /* | |
629 | =for apidoc pad_findlex | |
630 | ||
631 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
d7afa7f5 JH |
632 | in the inner pads if it's found in an outer one. innercv is the CV *inside* |
633 | the chain of outer CVs to be searched. If newoff is non-null, this is a | |
634 | run-time cloning: don't add fake entries, just find the lexical and add a | |
635 | ref to it at newoff in the current pad. | |
9755d405 JH |
636 | |
637 | =cut | |
638 | */ | |
639 | ||
9755d405 | 640 | STATIC PADOFFSET |
c05e0e2f | 641 | S_pad_findlex(pTHX_ const char *name, PADOFFSET newoff, const CV* innercv) |
9755d405 JH |
642 | { |
643 | CV *cv; | |
d7afa7f5 | 644 | I32 off = 0; |
9755d405 | 645 | SV *sv; |
d7afa7f5 JH |
646 | CV* startcv; |
647 | U32 seq; | |
648 | I32 depth; | |
649 | AV *oldpad; | |
650 | SV *oldsv; | |
651 | AV *curlist; | |
652 | ||
653 | ASSERT_CURPAD_ACTIVE("pad_findlex"); | |
9755d405 | 654 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
d7afa7f5 JH |
655 | "Pad findlex: \"%s\" off=%ld startcv=0x%"UVxf"\n", |
656 | name, (long)newoff, PTR2UV(innercv)) | |
9755d405 JH |
657 | ); |
658 | ||
d7afa7f5 JH |
659 | seq = CvOUTSIDE_SEQ(innercv); |
660 | startcv = CvOUTSIDE(innercv); | |
661 | ||
662 | for (cv = startcv; cv; seq = CvOUTSIDE_SEQ(cv), cv = CvOUTSIDE(cv)) { | |
663 | SV **svp; | |
9755d405 | 664 | AV *curname; |
d7afa7f5 | 665 | I32 fake_off = 0; |
9755d405 JH |
666 | |
667 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
d7afa7f5 JH |
668 | " searching: cv=0x%"UVxf" seq=%d\n", |
669 | PTR2UV(cv), (int) seq ) | |
9755d405 JH |
670 | ); |
671 | ||
d7afa7f5 JH |
672 | curlist = CvPADLIST(cv); |
673 | if (!curlist) | |
674 | continue; /* an undef CV */ | |
675 | svp = av_fetch(curlist, 0, FALSE); | |
9755d405 JH |
676 | if (!svp || *svp == &PL_sv_undef) |
677 | continue; | |
678 | curname = (AV*)*svp; | |
679 | svp = AvARRAY(curname); | |
d7afa7f5 JH |
680 | |
681 | depth = CvDEPTH(cv); | |
9755d405 | 682 | for (off = AvFILLp(curname); off > 0; off--) { |
d7afa7f5 JH |
683 | sv = svp[off]; |
684 | if (!sv || sv == &PL_sv_undef || !strEQ(SvPVX(sv), name)) | |
9755d405 | 685 | continue; |
d7afa7f5 JH |
686 | if (SvFAKE(sv)) { |
687 | /* we'll use this later if we don't find a real entry */ | |
688 | fake_off = off; | |
689 | continue; | |
690 | } | |
691 | else { | |
91ca9d19 JH |
692 | if ( seq > U_32(SvNVX(sv)) /* min */ |
693 | && seq <= (U32)SvIVX(sv) /* max */ | |
d7afa7f5 JH |
694 | && !(newoff && !depth) /* ignore inactive when cloning */ |
695 | ) | |
696 | goto found; | |
9755d405 | 697 | } |
d7afa7f5 | 698 | } |
9755d405 | 699 | |
d7afa7f5 JH |
700 | /* no real entry - but did we find a fake one? */ |
701 | if (fake_off) { | |
702 | if (newoff && !depth) | |
703 | return 0; /* don't clone from inactive stack frame */ | |
704 | off = fake_off; | |
705 | sv = svp[off]; | |
706 | goto found; | |
707 | } | |
708 | } | |
709 | return 0; | |
9755d405 | 710 | |
d7afa7f5 | 711 | found: |
9755d405 | 712 | |
d7afa7f5 JH |
713 | if (!depth) |
714 | depth = 1; | |
715 | ||
716 | oldpad = (AV*)AvARRAY(curlist)[depth]; | |
717 | oldsv = *av_fetch(oldpad, off, TRUE); | |
9755d405 | 718 | |
d7afa7f5 JH |
719 | #ifdef DEBUGGING |
720 | if (SvFAKE(sv)) | |
721 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
722 | " matched: offset %ld" | |
723 | " FAKE, sv=0x%"UVxf"\n", | |
724 | (long)off, | |
725 | PTR2UV(oldsv) | |
726 | ) | |
727 | ); | |
728 | else | |
729 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
730 | " matched: offset %ld" | |
731 | " (%lu,%lu), sv=0x%"UVxf"\n", | |
732 | (long)off, | |
91ca9d19 | 733 | (unsigned long)U_32(SvNVX(sv)), |
d7afa7f5 JH |
734 | (unsigned long)SvIVX(sv), |
735 | PTR2UV(oldsv) | |
736 | ) | |
737 | ); | |
738 | #endif | |
739 | ||
740 | if (!newoff) { /* Not a mere clone operation. */ | |
741 | newoff = pad_add_name( | |
742 | SvPVX(sv), | |
743 | (SvFLAGS(sv) & SVpad_TYPED) ? SvSTASH(sv) : Nullhv, | |
744 | (SvFLAGS(sv) & SVpad_OUR) ? GvSTASH(sv) : Nullhv, | |
745 | 1 /* fake */ | |
746 | ); | |
747 | ||
748 | if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) { | |
749 | /* "It's closures all the way down." */ | |
750 | CvCLONE_on(PL_compcv); | |
751 | if (cv == startcv) { | |
752 | if (CvANON(PL_compcv)) | |
753 | oldsv = Nullsv; /* no need to keep ref */ | |
754 | } | |
755 | else { | |
756 | CV *bcv; | |
757 | for (bcv = startcv; | |
758 | bcv && bcv != cv && !CvCLONE(bcv); | |
759 | bcv = CvOUTSIDE(bcv)) | |
760 | { | |
761 | if (CvANON(bcv)) { | |
762 | /* install the missing pad entry in intervening | |
763 | * nested subs and mark them cloneable. */ | |
764 | AV *ocomppad_name = PL_comppad_name; | |
765 | PAD *ocomppad = PL_comppad; | |
766 | AV *padlist = CvPADLIST(bcv); | |
767 | PL_comppad_name = (AV*)AvARRAY(padlist)[0]; | |
768 | PL_comppad = (AV*)AvARRAY(padlist)[1]; | |
769 | PL_curpad = AvARRAY(PL_comppad); | |
770 | pad_add_name( | |
771 | SvPVX(sv), | |
772 | (SvFLAGS(sv) & SVpad_TYPED) | |
773 | ? SvSTASH(sv) : Nullhv, | |
774 | (SvFLAGS(sv) & SVpad_OUR) | |
775 | ? GvSTASH(sv) : Nullhv, | |
776 | 1 /* fake */ | |
777 | ); | |
778 | ||
779 | PL_comppad_name = ocomppad_name; | |
780 | PL_comppad = ocomppad; | |
781 | PL_curpad = ocomppad ? | |
782 | AvARRAY(ocomppad) : Null(SV **); | |
783 | CvCLONE_on(bcv); | |
9755d405 JH |
784 | } |
785 | else { | |
d7afa7f5 JH |
786 | if (ckWARN(WARN_CLOSURE) |
787 | && !CvUNIQUE(bcv) && !CvUNIQUE(cv)) | |
9755d405 | 788 | { |
d7afa7f5 JH |
789 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
790 | "Variable \"%s\" may be unavailable", | |
791 | name); | |
9755d405 | 792 | } |
d7afa7f5 | 793 | break; |
9755d405 JH |
794 | } |
795 | } | |
796 | } | |
9755d405 | 797 | } |
d7afa7f5 JH |
798 | else if (!CvUNIQUE(PL_compcv)) { |
799 | if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv) | |
800 | && !(SvFLAGS(sv) & SVpad_OUR)) | |
801 | { | |
802 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
803 | "Variable \"%s\" will not stay shared", name); | |
9755d405 | 804 | } |
9755d405 JH |
805 | } |
806 | } | |
d7afa7f5 JH |
807 | av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv)); |
808 | ASSERT_CURPAD_ACTIVE("pad_findlex 2"); | |
809 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
810 | "Pad findlex: set offset %ld to sv 0x%"UVxf"\n", | |
811 | (long)newoff, PTR2UV(oldsv) | |
812 | ) | |
813 | ); | |
814 | return newoff; | |
9755d405 JH |
815 | } |
816 | ||
817 | ||
818 | /* | |
819 | =for apidoc pad_sv | |
820 | ||
821 | Get the value at offset po in the current pad. | |
822 | Use macro PAD_SV instead of calling this function directly. | |
823 | ||
824 | =cut | |
825 | */ | |
826 | ||
827 | ||
828 | SV * | |
829 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
830 | { | |
d7afa7f5 | 831 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
9755d405 JH |
832 | |
833 | #ifndef USE_5005THREADS | |
834 | if (!po) | |
835 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
836 | #endif | |
837 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
838 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
d7afa7f5 | 839 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
9755d405 JH |
840 | ); |
841 | return PL_curpad[po]; | |
842 | } | |
843 | ||
844 | ||
845 | /* | |
846 | =for apidoc pad_setsv | |
847 | ||
848 | Set the entry at offset po in the current pad to sv. | |
849 | Use the macro PAD_SETSV() rather than calling this function directly. | |
850 | ||
851 | =cut | |
852 | */ | |
853 | ||
854 | #ifdef DEBUGGING | |
855 | void | |
856 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
857 | { | |
d7afa7f5 | 858 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
9755d405 JH |
859 | |
860 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
861 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
d7afa7f5 | 862 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
9755d405 JH |
863 | ); |
864 | PL_curpad[po] = sv; | |
865 | } | |
866 | #endif | |
867 | ||
868 | ||
869 | ||
870 | /* | |
871 | =for apidoc pad_block_start | |
872 | ||
873 | Update the pad compilation state variables on entry to a new block | |
874 | ||
875 | =cut | |
876 | */ | |
877 | ||
878 | /* XXX DAPM perhaps: | |
879 | * - integrate this in general state-saving routine ??? | |
880 | * - combine with the state-saving going on in pad_new ??? | |
881 | * - introduce a new SAVE type that does all this in one go ? | |
882 | */ | |
883 | ||
884 | void | |
885 | Perl_pad_block_start(pTHX_ int full) | |
886 | { | |
d7afa7f5 | 887 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
9755d405 JH |
888 | SAVEI32(PL_comppad_name_floor); |
889 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
890 | if (full) | |
891 | PL_comppad_name_fill = PL_comppad_name_floor; | |
892 | if (PL_comppad_name_floor < 0) | |
893 | PL_comppad_name_floor = 0; | |
894 | SAVEI32(PL_min_intro_pending); | |
895 | SAVEI32(PL_max_intro_pending); | |
896 | PL_min_intro_pending = 0; | |
897 | SAVEI32(PL_comppad_name_fill); | |
898 | SAVEI32(PL_padix_floor); | |
899 | PL_padix_floor = PL_padix; | |
900 | PL_pad_reset_pending = FALSE; | |
901 | } | |
902 | ||
903 | ||
904 | /* | |
905 | =for apidoc intro_my | |
906 | ||
907 | "Introduce" my variables to visible status. | |
908 | ||
909 | =cut | |
910 | */ | |
911 | ||
912 | U32 | |
913 | Perl_intro_my(pTHX) | |
914 | { | |
915 | SV **svp; | |
916 | SV *sv; | |
917 | I32 i; | |
918 | ||
d7afa7f5 | 919 | ASSERT_CURPAD_ACTIVE("intro_my"); |
9755d405 JH |
920 | if (! PL_min_intro_pending) |
921 | return PL_cop_seqmax; | |
922 | ||
923 | svp = AvARRAY(PL_comppad_name); | |
924 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
d7afa7f5 JH |
925 | if ((sv = svp[i]) && sv != &PL_sv_undef |
926 | && !SvFAKE(sv) && !SvIVX(sv)) | |
927 | { | |
0da6cfda SP |
928 | SvIV_set(sv, PAD_MAX); /* Don't know scope end yet. */ |
929 | SvNV_set(sv, (NV)PL_cop_seqmax); | |
9755d405 JH |
930 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
931 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", | |
932 | (long)i, SvPVX(sv), | |
91ca9d19 | 933 | (unsigned long)U_32(SvNVX(sv)), (unsigned long)SvIVX(sv)) |
9755d405 JH |
934 | ); |
935 | } | |
936 | } | |
937 | PL_min_intro_pending = 0; | |
938 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
939 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
940 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax+1))); | |
941 | ||
942 | return PL_cop_seqmax++; | |
943 | } | |
944 | ||
945 | /* | |
946 | =for apidoc pad_leavemy | |
947 | ||
948 | Cleanup at end of scope during compilation: set the max seq number for | |
949 | lexicals in this scope and warn of any lexicals that never got introduced. | |
950 | ||
951 | =cut | |
952 | */ | |
953 | ||
954 | void | |
955 | Perl_pad_leavemy(pTHX) | |
956 | { | |
957 | I32 off; | |
958 | SV **svp = AvARRAY(PL_comppad_name); | |
9755d405 JH |
959 | |
960 | PL_pad_reset_pending = FALSE; | |
961 | ||
d7afa7f5 | 962 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
9755d405 JH |
963 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
964 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
c05e0e2f | 965 | const SV *sv; |
d7afa7f5 JH |
966 | if ((sv = svp[off]) && sv != &PL_sv_undef |
967 | && !SvFAKE(sv) && ckWARN_d(WARN_INTERNAL)) | |
9755d405 | 968 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
c293eb2b | 969 | "%"SVf" never introduced", sv); |
9755d405 JH |
970 | } |
971 | } | |
972 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
973 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
c05e0e2f | 974 | const SV *sv; |
d7afa7f5 JH |
975 | if ((sv = svp[off]) && sv != &PL_sv_undef |
976 | && !SvFAKE(sv) && SvIVX(sv) == PAD_MAX) | |
977 | { | |
0da6cfda | 978 | SvIV_set(sv, PL_cop_seqmax); |
9755d405 JH |
979 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
980 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", | |
981 | (long)off, SvPVX(sv), | |
91ca9d19 | 982 | (unsigned long)U_32(SvNVX(sv)), (unsigned long)SvIVX(sv)) |
9755d405 JH |
983 | ); |
984 | } | |
985 | } | |
986 | PL_cop_seqmax++; | |
987 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
988 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
989 | } | |
990 | ||
991 | ||
992 | /* | |
993 | =for apidoc pad_swipe | |
994 | ||
995 | Abandon the tmp in the current pad at offset po and replace with a | |
996 | new one. | |
997 | ||
998 | =cut | |
999 | */ | |
1000 | ||
1001 | void | |
1002 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1003 | { | |
d7afa7f5 | 1004 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
9755d405 JH |
1005 | if (!PL_curpad) |
1006 | return; | |
1007 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1008 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1009 | if (!po) | |
1010 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1011 | ||
1012 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1013 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1014 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1015 | ||
1016 | if (PL_curpad[po]) | |
1017 | SvPADTMP_off(PL_curpad[po]); | |
1018 | if (refadjust) | |
1019 | SvREFCNT_dec(PL_curpad[po]); | |
1020 | ||
1021 | PL_curpad[po] = NEWSV(1107,0); | |
1022 | SvPADTMP_on(PL_curpad[po]); | |
1023 | if ((I32)po < PL_padix) | |
1024 | PL_padix = po - 1; | |
1025 | } | |
1026 | ||
1027 | ||
1028 | /* | |
1029 | =for apidoc pad_reset | |
1030 | ||
1031 | Mark all the current temporaries for reuse | |
1032 | ||
1033 | =cut | |
1034 | */ | |
1035 | ||
1036 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1037 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1038 | * on the stack by OPs that use them, there are several ways to get an alias | |
1039 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1040 | * We avoid doing this until we can think of a Better Way. | |
1041 | * GSAR 97-10-29 */ | |
1042 | void | |
1043 | Perl_pad_reset(pTHX) | |
1044 | { | |
1045 | #ifdef USE_BROKEN_PAD_RESET | |
9755d405 JH |
1046 | if (AvARRAY(PL_comppad) != PL_curpad) |
1047 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1048 | ||
1049 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1050 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1051 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1052 | (long)PL_padix, (long)PL_padix_floor | |
1053 | ) | |
1054 | ); | |
1055 | ||
1056 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
c05e0e2f | 1057 | register I32 po; |
9755d405 JH |
1058 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1059 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1060 | SvPADTMP_off(PL_curpad[po]); | |
1061 | } | |
1062 | PL_padix = PL_padix_floor; | |
1063 | } | |
1064 | #endif | |
1065 | PL_pad_reset_pending = FALSE; | |
1066 | } | |
1067 | ||
1068 | ||
1069 | /* | |
1070 | =for apidoc pad_tidy | |
1071 | ||
1072 | Tidy up a pad after we've finished compiling it: | |
1073 | * remove most stuff from the pads of anonsub prototypes; | |
1074 | * give it a @_; | |
1075 | * mark tmps as such. | |
1076 | ||
1077 | =cut | |
1078 | */ | |
1079 | ||
1080 | /* XXX DAPM surely most of this stuff should be done properly | |
1081 | * at the right time beforehand, rather than going around afterwards | |
1082 | * cleaning up our mistakes ??? | |
1083 | */ | |
1084 | ||
1085 | void | |
1086 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1087 | { | |
1088 | PADOFFSET ix; | |
1089 | ||
d7afa7f5 | 1090 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
9755d405 JH |
1091 | /* extend curpad to match namepad */ |
1092 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
1093 | av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv); | |
1094 | ||
1095 | if (type == padtidy_SUBCLONE) { | |
1096 | SV **namep = AvARRAY(PL_comppad_name); | |
1097 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { | |
1098 | SV *namesv; | |
1099 | ||
1100 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1101 | continue; | |
1102 | /* | |
1103 | * The only things that a clonable function needs in its | |
1104 | * pad are references to outer lexicals and anonymous subs. | |
1105 | * The rest are created anew during cloning. | |
1106 | */ | |
1107 | if (!((namesv = namep[ix]) != Nullsv && | |
1108 | namesv != &PL_sv_undef && | |
1109 | (SvFAKE(namesv) || | |
1110 | *SvPVX(namesv) == '&'))) | |
1111 | { | |
1112 | SvREFCNT_dec(PL_curpad[ix]); | |
1113 | PL_curpad[ix] = Nullsv; | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | else if (type == padtidy_SUB) { | |
1118 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
1119 | AV *av = newAV(); /* Will be @_ */ | |
1120 | av_extend(av, 0); | |
1121 | av_store(PL_comppad, 0, (SV*)av); | |
1122 | AvFLAGS(av) = AVf_REIFY; | |
1123 | } | |
1124 | ||
1125 | /* XXX DAPM rationalise these two similar branches */ | |
1126 | ||
1127 | if (type == padtidy_SUB) { | |
1128 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { | |
1129 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1130 | continue; | |
1131 | if (!SvPADMY(PL_curpad[ix])) | |
1132 | SvPADTMP_on(PL_curpad[ix]); | |
1133 | } | |
1134 | } | |
1135 | else if (type == padtidy_FORMAT) { | |
1136 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { | |
1137 | if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix])) | |
1138 | SvPADTMP_on(PL_curpad[ix]); | |
1139 | } | |
1140 | } | |
d7afa7f5 | 1141 | PL_curpad = AvARRAY(PL_comppad); |
9755d405 JH |
1142 | } |
1143 | ||
1144 | ||
1145 | /* | |
1146 | =for apidoc pad_free | |
1147 | ||
de7b736d | 1148 | Free the SV at offset po in the current pad. |
9755d405 JH |
1149 | |
1150 | =cut | |
1151 | */ | |
1152 | ||
1153 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1154 | void | |
1155 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1156 | { | |
d7afa7f5 | 1157 | ASSERT_CURPAD_LEGAL("pad_free"); |
9755d405 JH |
1158 | if (!PL_curpad) |
1159 | return; | |
1160 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1161 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1162 | if (!po) | |
1163 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1164 | ||
1165 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1166 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1167 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1168 | ); | |
1169 | ||
1170 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1171 | SvPADTMP_off(PL_curpad[po]); | |
1172 | #ifdef USE_ITHREADS | |
1173 | /* SV could be a shared hash key (eg bugid #19022) */ | |
1174 | if (!SvFAKE(PL_curpad[po])) | |
1175 | SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */ | |
1176 | #endif | |
1177 | ||
1178 | } | |
1179 | if ((I32)po < PL_padix) | |
1180 | PL_padix = po - 1; | |
1181 | } | |
1182 | ||
1183 | ||
1184 | ||
1185 | /* | |
1186 | =for apidoc do_dump_pad | |
1187 | ||
1188 | Dump the contents of a padlist | |
1189 | ||
1190 | =cut | |
1191 | */ | |
1192 | ||
1193 | void | |
1194 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1195 | { | |
c05e0e2f AL |
1196 | const AV *pad_name; |
1197 | const AV *pad; | |
9755d405 JH |
1198 | SV **pname; |
1199 | SV **ppad; | |
9755d405 JH |
1200 | I32 ix; |
1201 | ||
1202 | if (!padlist) { | |
1203 | return; | |
1204 | } | |
1205 | pad_name = (AV*)*av_fetch((AV*)padlist, 0, FALSE); | |
1206 | pad = (AV*)*av_fetch((AV*)padlist, 1, FALSE); | |
1207 | pname = AvARRAY(pad_name); | |
1208 | ppad = AvARRAY(pad); | |
1209 | Perl_dump_indent(aTHX_ level, file, | |
1210 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1211 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1212 | ); | |
1213 | ||
1214 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
c05e0e2f | 1215 | const SV *namesv = pname[ix]; |
9755d405 JH |
1216 | if (namesv && namesv == &PL_sv_undef) { |
1217 | namesv = Nullsv; | |
1218 | } | |
1219 | if (namesv) { | |
d7afa7f5 JH |
1220 | if (SvFAKE(namesv)) |
1221 | Perl_dump_indent(aTHX_ level+1, file, | |
a72b686c | 1222 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\"\n", |
d7afa7f5 JH |
1223 | (int) ix, |
1224 | PTR2UV(ppad[ix]), | |
1225 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
a72b686c | 1226 | SvPVX(namesv) |
d7afa7f5 JH |
1227 | ); |
1228 | else | |
1229 | Perl_dump_indent(aTHX_ level+1, file, | |
a72b686c | 1230 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
d7afa7f5 JH |
1231 | (int) ix, |
1232 | PTR2UV(ppad[ix]), | |
1233 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
91ca9d19 | 1234 | (unsigned long)U_32(SvNVX(namesv)), |
d7afa7f5 | 1235 | (unsigned long)SvIVX(namesv), |
a72b686c | 1236 | SvPVX(namesv) |
d7afa7f5 | 1237 | ); |
9755d405 JH |
1238 | } |
1239 | else if (full) { | |
1240 | Perl_dump_indent(aTHX_ level+1, file, | |
1241 | "%2d. 0x%"UVxf"<%lu>\n", | |
1242 | (int) ix, | |
1243 | PTR2UV(ppad[ix]), | |
1244 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1245 | ); | |
1246 | } | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | ||
1251 | ||
1252 | /* | |
1253 | =for apidoc cv_dump | |
1254 | ||
1255 | dump the contents of a CV | |
1256 | ||
1257 | =cut | |
1258 | */ | |
1259 | ||
1260 | #ifdef DEBUGGING | |
1261 | STATIC void | |
c05e0e2f | 1262 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
9755d405 | 1263 | { |
c05e0e2f | 1264 | const CV *outside = CvOUTSIDE(cv); |
9755d405 JH |
1265 | AV* padlist = CvPADLIST(cv); |
1266 | ||
1267 | PerlIO_printf(Perl_debug_log, | |
1268 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1269 | title, | |
1270 | PTR2UV(cv), | |
1271 | (CvANON(cv) ? "ANON" | |
1272 | : (cv == PL_main_cv) ? "MAIN" | |
1273 | : CvUNIQUE(cv) ? "UNIQUE" | |
1274 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1275 | PTR2UV(outside), | |
1276 | (!outside ? "null" | |
1277 | : CvANON(outside) ? "ANON" | |
1278 | : (outside == PL_main_cv) ? "MAIN" | |
1279 | : CvUNIQUE(outside) ? "UNIQUE" | |
1280 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1281 | ||
1282 | PerlIO_printf(Perl_debug_log, | |
1283 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1284 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1285 | } | |
1286 | #endif /* DEBUGGING */ | |
1287 | ||
1288 | ||
1289 | ||
1290 | ||
1291 | ||
1292 | /* | |
1293 | =for apidoc cv_clone | |
1294 | ||
1295 | Clone a CV: make a new CV which points to the same code etc, but which | |
1296 | has a newly-created pad built by copying the prototype pad and capturing | |
1297 | any outer lexicals. | |
1298 | ||
1299 | =cut | |
1300 | */ | |
1301 | ||
1302 | CV * | |
1303 | Perl_cv_clone(pTHX_ CV *proto) | |
1304 | { | |
1305 | CV *cv; | |
1306 | ||
1307 | LOCK_CRED_MUTEX; /* XXX create separate mutex */ | |
1308 | cv = cv_clone2(proto, CvOUTSIDE(proto)); | |
1309 | UNLOCK_CRED_MUTEX; /* XXX create separate mutex */ | |
1310 | return cv; | |
1311 | } | |
1312 | ||
1313 | ||
1314 | /* XXX DAPM separate out cv and paddish bits ??? | |
1315 | * ideally the CV-related stuff shouldn't be in pad.c - how about | |
1316 | * a cv.c? */ | |
1317 | ||
1318 | STATIC CV * | |
1319 | S_cv_clone2(pTHX_ CV *proto, CV *outside) | |
1320 | { | |
1321 | I32 ix; | |
1322 | AV* protopadlist = CvPADLIST(proto); | |
c05e0e2f AL |
1323 | const AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE); |
1324 | const AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE); | |
9755d405 JH |
1325 | SV** pname = AvARRAY(protopad_name); |
1326 | SV** ppad = AvARRAY(protopad); | |
c05e0e2f AL |
1327 | const I32 fname = AvFILLp(protopad_name); |
1328 | const I32 fpad = AvFILLp(protopad); | |
9755d405 JH |
1329 | AV* comppadlist; |
1330 | CV* cv; | |
1331 | ||
1332 | assert(!CvUNIQUE(proto)); | |
1333 | ||
1334 | ENTER; | |
1335 | SAVESPTR(PL_compcv); | |
1336 | ||
1337 | cv = PL_compcv = (CV*)NEWSV(1104, 0); | |
1338 | sv_upgrade((SV *)cv, SvTYPE(proto)); | |
d7afa7f5 | 1339 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE); |
9755d405 JH |
1340 | CvCLONED_on(cv); |
1341 | ||
1342 | #ifdef USE_5005THREADS | |
1343 | New(666, CvMUTEXP(cv), 1, perl_mutex); | |
1344 | MUTEX_INIT(CvMUTEXP(cv)); | |
1345 | CvOWNER(cv) = 0; | |
1346 | #endif /* USE_5005THREADS */ | |
1347 | #ifdef USE_ITHREADS | |
1348 | CvFILE(cv) = CvXSUB(proto) ? CvFILE(proto) | |
1349 | : savepv(CvFILE(proto)); | |
1350 | #else | |
1351 | CvFILE(cv) = CvFILE(proto); | |
1352 | #endif | |
1353 | CvGV(cv) = CvGV(proto); | |
1354 | CvSTASH(cv) = CvSTASH(proto); | |
46330ab1 | 1355 | OP_REFCNT_LOCK; |
9755d405 | 1356 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
46330ab1 | 1357 | OP_REFCNT_UNLOCK; |
9755d405 | 1358 | CvSTART(cv) = CvSTART(proto); |
d7afa7f5 | 1359 | if (outside) { |
9755d405 | 1360 | CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside); |
d7afa7f5 JH |
1361 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
1362 | } | |
9755d405 JH |
1363 | |
1364 | if (SvPOK(proto)) | |
1365 | sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto)); | |
1366 | ||
1367 | CvPADLIST(cv) = comppadlist = pad_new(padnew_CLONE|padnew_SAVE); | |
1368 | ||
1369 | for (ix = fname; ix >= 0; ix--) | |
1370 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); | |
1371 | ||
1372 | av_fill(PL_comppad, fpad); | |
1373 | PL_curpad = AvARRAY(PL_comppad); | |
1374 | ||
1375 | for (ix = fpad; ix > 0; ix--) { | |
1376 | SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; | |
1377 | if (namesv && namesv != &PL_sv_undef) { | |
1378 | char *name = SvPVX(namesv); /* XXX */ | |
1379 | if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */ | |
d7afa7f5 | 1380 | I32 off = pad_findlex(name, ix, cv); |
9755d405 JH |
1381 | if (!off) |
1382 | PL_curpad[ix] = SvREFCNT_inc(ppad[ix]); | |
1383 | else if (off != ix) | |
1384 | Perl_croak(aTHX_ "panic: cv_clone: %s", name); | |
1385 | } | |
1386 | else { /* our own lexical */ | |
1387 | SV* sv; | |
1388 | if (*name == '&') { | |
1389 | /* anon code -- we'll come back for it */ | |
1390 | sv = SvREFCNT_inc(ppad[ix]); | |
1391 | } | |
1392 | else if (*name == '@') | |
1393 | sv = (SV*)newAV(); | |
1394 | else if (*name == '%') | |
1395 | sv = (SV*)newHV(); | |
1396 | else | |
1397 | sv = NEWSV(0, 0); | |
1398 | if (!SvPADBUSY(sv)) | |
1399 | SvPADMY_on(sv); | |
1400 | PL_curpad[ix] = sv; | |
1401 | } | |
1402 | } | |
1403 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
1404 | PL_curpad[ix] = SvREFCNT_inc(ppad[ix]); | |
1405 | } | |
1406 | else { | |
1407 | SV* sv = NEWSV(0, 0); | |
1408 | SvPADTMP_on(sv); | |
1409 | PL_curpad[ix] = sv; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | /* Now that vars are all in place, clone nested closures. */ | |
1414 | ||
1415 | for (ix = fpad; ix > 0; ix--) { | |
1416 | SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; | |
1417 | if (namesv | |
1418 | && namesv != &PL_sv_undef | |
1419 | && !(SvFLAGS(namesv) & SVf_FAKE) | |
1420 | && *SvPVX(namesv) == '&' | |
1421 | && CvCLONE(ppad[ix])) | |
1422 | { | |
1423 | CV *kid = cv_clone2((CV*)ppad[ix], cv); | |
1424 | SvREFCNT_dec(ppad[ix]); | |
1425 | CvCLONE_on(kid); | |
1426 | SvPADMY_on(kid); | |
1427 | PL_curpad[ix] = (SV*)kid; | |
d7afa7f5 JH |
1428 | /* '&' entry points to child, so child mustn't refcnt parent */ |
1429 | CvWEAKOUTSIDE_on(kid); | |
1430 | SvREFCNT_dec(cv); | |
9755d405 JH |
1431 | } |
1432 | } | |
1433 | ||
1434 | DEBUG_Xv( | |
1435 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1436 | cv_dump(outside, "Outside"); | |
1437 | cv_dump(proto, "Proto"); | |
1438 | cv_dump(cv, "To"); | |
1439 | ); | |
1440 | ||
1441 | LEAVE; | |
1442 | ||
1443 | if (CvCONST(cv)) { | |
1444 | SV* const_sv = op_const_sv(CvSTART(cv), cv); | |
1445 | assert(const_sv); | |
1446 | /* constant sub () { $x } closing over $x - see lib/constant.pm */ | |
1447 | SvREFCNT_dec(cv); | |
1448 | cv = newCONSTSUB(CvSTASH(proto), 0, const_sv); | |
1449 | } | |
1450 | ||
1451 | return cv; | |
1452 | } | |
1453 | ||
1454 | ||
1455 | /* | |
1456 | =for apidoc pad_fixup_inner_anons | |
1457 | ||
1458 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
d7afa7f5 JH |
1459 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1460 | moved to a pre-existing CV struct. | |
9755d405 JH |
1461 | |
1462 | =cut | |
1463 | */ | |
1464 | ||
1465 | void | |
1466 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1467 | { | |
1468 | I32 ix; | |
1469 | AV *comppad_name = (AV*)AvARRAY(padlist)[0]; | |
1470 | AV *comppad = (AV*)AvARRAY(padlist)[1]; | |
1471 | SV **namepad = AvARRAY(comppad_name); | |
1472 | SV **curpad = AvARRAY(comppad); | |
1473 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
c05e0e2f | 1474 | const SV *namesv = namepad[ix]; |
9755d405 JH |
1475 | if (namesv && namesv != &PL_sv_undef |
1476 | && *SvPVX(namesv) == '&') | |
1477 | { | |
1478 | CV *innercv = (CV*)curpad[ix]; | |
d7afa7f5 JH |
1479 | assert(CvWEAKOUTSIDE(innercv)); |
1480 | assert(CvOUTSIDE(innercv) == old_cv); | |
1481 | CvOUTSIDE(innercv) = new_cv; | |
9755d405 JH |
1482 | } |
1483 | } | |
1484 | } | |
1485 | ||
d7afa7f5 | 1486 | |
9755d405 JH |
1487 | /* |
1488 | =for apidoc pad_push | |
1489 | ||
1490 | Push a new pad frame onto the padlist, unless there's already a pad at | |
1491 | this depth, in which case don't bother creating a new one. | |
1492 | If has_args is true, give the new pad an @_ in slot zero. | |
1493 | ||
1494 | =cut | |
1495 | */ | |
1496 | ||
8b3a4b74 NC |
1497 | /* XXX pad_push is now always called with has_args == 1. Get rid of |
1498 | * this arg at some point */ | |
1499 | ||
9755d405 JH |
1500 | void |
1501 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth, int has_args) | |
1502 | { | |
1503 | if (depth <= AvFILLp(padlist)) | |
1504 | return; | |
1505 | ||
1506 | { | |
1507 | SV** svp = AvARRAY(padlist); | |
1508 | AV *newpad = newAV(); | |
1509 | SV **oldpad = AvARRAY(svp[depth-1]); | |
1510 | I32 ix = AvFILLp((AV*)svp[1]); | |
1511 | I32 names_fill = AvFILLp((AV*)svp[0]); | |
1512 | SV** names = AvARRAY(svp[0]); | |
1513 | SV* sv; | |
1514 | for ( ;ix > 0; ix--) { | |
1515 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
1516 | char *name = SvPVX(names[ix]); | |
1517 | if ((SvFLAGS(names[ix]) & SVf_FAKE) || *name == '&') { | |
1518 | /* outer lexical or anon code */ | |
1519 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
1520 | } | |
1521 | else { /* our own lexical */ | |
1522 | if (*name == '@') | |
1523 | av_store(newpad, ix, sv = (SV*)newAV()); | |
1524 | else if (*name == '%') | |
1525 | av_store(newpad, ix, sv = (SV*)newHV()); | |
1526 | else | |
1527 | av_store(newpad, ix, sv = NEWSV(0, 0)); | |
1528 | SvPADMY_on(sv); | |
1529 | } | |
1530 | } | |
1531 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
1532 | av_store(newpad, ix, sv = SvREFCNT_inc(oldpad[ix])); | |
1533 | } | |
1534 | else { | |
1535 | /* save temporaries on recursion? */ | |
1536 | av_store(newpad, ix, sv = NEWSV(0, 0)); | |
1537 | SvPADTMP_on(sv); | |
1538 | } | |
1539 | } | |
1540 | if (has_args) { | |
1541 | AV* av = newAV(); | |
1542 | av_extend(av, 0); | |
1543 | av_store(newpad, 0, (SV*)av); | |
1544 | AvFLAGS(av) = AVf_REIFY; | |
1545 | } | |
1546 | av_store(padlist, depth, (SV*)newpad); | |
1547 | AvFILLp(padlist) = depth; | |
1548 | } | |
1549 | } | |
25e59d17 NC |
1550 | |
1551 | ||
1552 | HV * | |
1553 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
1554 | { | |
1555 | SV** const av = av_fetch(PL_comppad_name, po, FALSE); | |
1556 | if ( SvFLAGS(*av) & SVpad_TYPED ) { | |
1557 | return SvSTASH(*av); | |
1558 | } | |
1559 | return Nullhv; | |
1560 | } |