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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
b5c19bd7 | 3 | * Copyright (C) 2002,2003 by Larry Wall and others |
dd2155a4 DM |
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 | ||
25 | =for apidoc m|AV *|CvPADLIST|CV *cv | |
26 | CV's can have CvPADLIST(cv) set to point to an AV. | |
27 | ||
28 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
29 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
30 | executing). Require'd files are simply evals without any outer lexical |
31 | scope. | |
dd2155a4 DM |
32 | |
33 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
34 | but that is really the callers pad (a slot of which is allocated by | |
35 | every entersub). | |
36 | ||
37 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
f3548bdc | 38 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 DM |
39 | The items in the AV are not SVs as for a normal AV, but other AVs: |
40 | ||
41 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
42 | the "static type information" for lexicals. | |
43 | ||
44 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
45 | depth of recursion into the CV. | |
46 | The 0'th slot of a frame AV is an AV which is @_. | |
47 | other entries are storage for variables and op targets. | |
48 | ||
49 | During compilation: | |
a6d05634 TM |
50 | C<PL_comppad_name> is set to the names AV. |
51 | C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1. | |
52 | C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)). | |
dd2155a4 | 53 | |
f3548bdc DM |
54 | During execution, C<PL_comppad> and C<PL_curpad> refer to the live |
55 | frame of the currently executing sub. | |
56 | ||
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. | |
70 | NV+1..IV inclusive is a range of cop_seq numbers for which the name is | |
71 | valid. For typed lexicals name SV is SVt_PVMG and SvSTASH points at the | |
72 | type. For C<our> lexicals, the type is SVt_PVGV, and GvSTASH points at the | |
73 | stash of the associated global (so that duplicate C<our> delarations in the | |
74 | same package can be detected). SvCUR is sometimes hijacked to | |
75 | store the generation number during compilation. | |
76 | ||
b5c19bd7 DM |
77 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
78 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
79 | the name SV does not use NVX and IVX to store a cop_seq range, since it is | |
80 | in scope throughout. Instead IVX stores some flags containing info about | |
81 | the real lexical (is it declared in an anon, and is it capable of being | |
82 | instantiated multiple times?), and for fake ANONs, NVX contains the index | |
83 | within the parent's pad where the lexical's value is stored, to make | |
84 | cloning quicker. | |
dd2155a4 | 85 | |
a6d05634 | 86 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
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 | ||
71f882da DM |
91 | Note that formats are treated as anon subs, and are cloned each time |
92 | write is called (if necessary). | |
93 | ||
dd2155a4 DM |
94 | =cut |
95 | */ | |
96 | ||
97 | ||
98 | #include "EXTERN.h" | |
99 | #define PERL_IN_PAD_C | |
100 | #include "perl.h" | |
101 | ||
102 | ||
103 | #define PAD_MAX 999999999 | |
104 | ||
105 | ||
106 | ||
107 | /* | |
108 | =for apidoc pad_new | |
109 | ||
110 | Create a new compiling padlist, saving and updating the various global | |
111 | vars at the same time as creating the pad itself. The following flags | |
112 | can be OR'ed together: | |
113 | ||
114 | padnew_CLONE this pad is for a cloned CV | |
115 | padnew_SAVE save old globals | |
116 | padnew_SAVESUB also save extra stuff for start of sub | |
117 | ||
118 | =cut | |
119 | */ | |
120 | ||
121 | PADLIST * | |
c7c737cb | 122 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 DM |
123 | { |
124 | AV *padlist, *padname, *pad, *a0; | |
125 | ||
f3548bdc DM |
126 | ASSERT_CURPAD_LEGAL("pad_new"); |
127 | ||
dd2155a4 DM |
128 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
129 | * vars (based on flags) rather than storing vals + addresses for | |
130 | * each individually. Also see pad_block_start. | |
131 | * XXX DAPM Try to see whether all these conditionals are required | |
132 | */ | |
133 | ||
134 | /* save existing state, ... */ | |
135 | ||
136 | if (flags & padnew_SAVE) { | |
3979c56f | 137 | SAVECOMPPAD(); |
dd2155a4 DM |
138 | SAVESPTR(PL_comppad_name); |
139 | if (! (flags & padnew_CLONE)) { | |
140 | SAVEI32(PL_padix); | |
141 | SAVEI32(PL_comppad_name_fill); | |
142 | SAVEI32(PL_min_intro_pending); | |
143 | SAVEI32(PL_max_intro_pending); | |
b5c19bd7 | 144 | SAVEI32(PL_cv_has_eval); |
dd2155a4 DM |
145 | if (flags & padnew_SAVESUB) { |
146 | SAVEI32(PL_pad_reset_pending); | |
147 | } | |
148 | } | |
149 | } | |
150 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
151 | * saved - check at some pt that this is okay */ | |
152 | ||
153 | /* ... create new pad ... */ | |
154 | ||
155 | padlist = newAV(); | |
156 | padname = newAV(); | |
157 | pad = newAV(); | |
158 | ||
159 | if (flags & padnew_CLONE) { | |
160 | /* XXX DAPM I dont know why cv_clone needs it | |
161 | * doing differently yet - perhaps this separate branch can be | |
162 | * dispensed with eventually ??? | |
163 | */ | |
164 | ||
165 | a0 = newAV(); /* will be @_ */ | |
166 | av_extend(a0, 0); | |
167 | av_store(pad, 0, (SV*)a0); | |
168 | AvFLAGS(a0) = AVf_REIFY; | |
169 | } | |
170 | else { | |
dd2155a4 | 171 | av_store(pad, 0, Nullsv); |
dd2155a4 DM |
172 | } |
173 | ||
174 | AvREAL_off(padlist); | |
175 | av_store(padlist, 0, (SV*)padname); | |
176 | av_store(padlist, 1, (SV*)pad); | |
177 | ||
178 | /* ... then update state variables */ | |
179 | ||
180 | PL_comppad_name = (AV*)(*av_fetch(padlist, 0, FALSE)); | |
181 | PL_comppad = (AV*)(*av_fetch(padlist, 1, FALSE)); | |
182 | PL_curpad = AvARRAY(PL_comppad); | |
183 | ||
184 | if (! (flags & padnew_CLONE)) { | |
185 | PL_comppad_name_fill = 0; | |
186 | PL_min_intro_pending = 0; | |
187 | PL_padix = 0; | |
b5c19bd7 | 188 | PL_cv_has_eval = 0; |
dd2155a4 DM |
189 | } |
190 | ||
191 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 192 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 193 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 194 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
195 | PTR2UV(padname), (UV)flags |
196 | ) | |
197 | ); | |
198 | ||
199 | return (PADLIST*)padlist; | |
200 | } | |
201 | ||
202 | /* | |
203 | =for apidoc pad_undef | |
204 | ||
205 | Free the padlist associated with a CV. | |
206 | If parts of it happen to be current, we null the relevant | |
207 | PL_*pad* global vars so that we don't have any dangling references left. | |
208 | We also repoint the CvOUTSIDE of any about-to-be-orphaned | |
a3985cdc | 209 | inner subs to the outer of this cv. |
dd2155a4 | 210 | |
7dafbf52 DM |
211 | (This function should really be called pad_free, but the name was already |
212 | taken) | |
213 | ||
dd2155a4 DM |
214 | =cut |
215 | */ | |
216 | ||
217 | void | |
a3985cdc | 218 | Perl_pad_undef(pTHX_ CV* cv) |
dd2155a4 DM |
219 | { |
220 | I32 ix; | |
221 | PADLIST *padlist = CvPADLIST(cv); | |
222 | ||
223 | if (!padlist) | |
224 | return; | |
225 | if (!SvREFCNT(CvPADLIST(cv))) /* may be during global destruction */ | |
226 | return; | |
227 | ||
228 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 DM |
229 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf"\n", |
230 | PTR2UV(cv), PTR2UV(padlist)) | |
dd2155a4 DM |
231 | ); |
232 | ||
7dafbf52 DM |
233 | /* detach any '&' anon children in the pad; if afterwards they |
234 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
235 | * bypassing us. */ | |
236 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
237 | * children, or integrate this loop with general cleanup */ | |
dd2155a4 | 238 | |
7dafbf52 DM |
239 | if (!PL_dirty) { /* don't bother during global destruction */ |
240 | CV *outercv = CvOUTSIDE(cv); | |
241 | U32 seq = CvOUTSIDE_SEQ(cv); | |
dd2155a4 DM |
242 | AV *comppad_name = (AV*)AvARRAY(padlist)[0]; |
243 | SV **namepad = AvARRAY(comppad_name); | |
244 | AV *comppad = (AV*)AvARRAY(padlist)[1]; | |
245 | SV **curpad = AvARRAY(comppad); | |
246 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
247 | SV *namesv = namepad[ix]; | |
248 | if (namesv && namesv != &PL_sv_undef | |
7dafbf52 | 249 | && *SvPVX(namesv) == '&') |
dd2155a4 DM |
250 | { |
251 | CV *innercv = (CV*)curpad[ix]; | |
7dafbf52 DM |
252 | namepad[ix] = Nullsv; |
253 | SvREFCNT_dec(namesv); | |
254 | curpad[ix] = Nullsv; | |
255 | SvREFCNT_dec(innercv); | |
256 | if (SvREFCNT(innercv) /* in use, not just a prototype */ | |
dd2155a4 DM |
257 | && CvOUTSIDE(innercv) == cv) |
258 | { | |
7dafbf52 DM |
259 | assert(CvWEAKOUTSIDE(innercv)); |
260 | CvWEAKOUTSIDE_off(innercv); | |
dd2155a4 | 261 | CvOUTSIDE(innercv) = outercv; |
a3985cdc | 262 | CvOUTSIDE_SEQ(innercv) = seq; |
7dafbf52 | 263 | SvREFCNT_inc(outercv); |
dd2155a4 DM |
264 | } |
265 | } | |
266 | } | |
267 | } | |
7dafbf52 | 268 | |
dd2155a4 DM |
269 | ix = AvFILLp(padlist); |
270 | while (ix >= 0) { | |
271 | SV* sv = AvARRAY(padlist)[ix--]; | |
272 | if (!sv) | |
273 | continue; | |
274 | if (sv == (SV*)PL_comppad_name) | |
275 | PL_comppad_name = Nullav; | |
276 | else if (sv == (SV*)PL_comppad) { | |
f3548bdc | 277 | PL_comppad = Null(PAD*); |
dd2155a4 DM |
278 | PL_curpad = Null(SV**); |
279 | } | |
280 | SvREFCNT_dec(sv); | |
281 | } | |
282 | SvREFCNT_dec((SV*)CvPADLIST(cv)); | |
283 | CvPADLIST(cv) = Null(PADLIST*); | |
284 | } | |
285 | ||
286 | ||
287 | ||
288 | ||
289 | /* | |
290 | =for apidoc pad_add_name | |
291 | ||
b5c19bd7 DM |
292 | Create a new name and associated PADMY SV in the current pad; return the |
293 | offset. | |
dd2155a4 DM |
294 | If C<typestash> is valid, the name is for a typed lexical; set the |
295 | name's stash to that value. | |
296 | If C<ourstash> is valid, it's an our lexical, set the name's | |
297 | GvSTASH to that value | |
298 | ||
dd2155a4 DM |
299 | If fake, it means we're cloning an existing entry |
300 | ||
301 | =cut | |
302 | */ | |
303 | ||
dd2155a4 DM |
304 | PADOFFSET |
305 | Perl_pad_add_name(pTHX_ char *name, HV* typestash, HV* ourstash, bool fake) | |
306 | { | |
307 | PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
308 | SV* namesv = NEWSV(1102, 0); | |
dd2155a4 | 309 | |
f3548bdc DM |
310 | ASSERT_CURPAD_ACTIVE("pad_add_name"); |
311 | ||
dd2155a4 | 312 | |
dd2155a4 DM |
313 | sv_upgrade(namesv, ourstash ? SVt_PVGV : typestash ? SVt_PVMG : SVt_PVNV); |
314 | sv_setpv(namesv, name); | |
315 | ||
316 | if (typestash) { | |
317 | SvFLAGS(namesv) |= SVpad_TYPED; | |
318 | SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*) typestash); | |
319 | } | |
320 | if (ourstash) { | |
321 | SvFLAGS(namesv) |= SVpad_OUR; | |
322 | GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*) ourstash); | |
323 | } | |
324 | ||
325 | av_store(PL_comppad_name, offset, namesv); | |
b5c19bd7 | 326 | if (fake) { |
dd2155a4 | 327 | SvFAKE_on(namesv); |
b5c19bd7 DM |
328 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
329 | "Pad addname: %ld \"%s\" FAKE\n", (long)offset, name)); | |
330 | } | |
dd2155a4 | 331 | else { |
ee6cee0c DM |
332 | /* not yet introduced */ |
333 | SvNVX(namesv) = (NV)PAD_MAX; /* min */ | |
334 | SvIVX(namesv) = 0; /* max */ | |
335 | ||
dd2155a4 DM |
336 | if (!PL_min_intro_pending) |
337 | PL_min_intro_pending = offset; | |
338 | PL_max_intro_pending = offset; | |
b5c19bd7 | 339 | /* if it's not a simple scalar, replace with an AV or HV */ |
f3548bdc DM |
340 | /* XXX DAPM since slot has been allocated, replace |
341 | * av_store with PL_curpad[offset] ? */ | |
dd2155a4 DM |
342 | if (*name == '@') |
343 | av_store(PL_comppad, offset, (SV*)newAV()); | |
344 | else if (*name == '%') | |
345 | av_store(PL_comppad, offset, (SV*)newHV()); | |
346 | SvPADMY_on(PL_curpad[offset]); | |
b5c19bd7 DM |
347 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
348 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
349 | (long)offset, name, PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
350 | } |
351 | ||
352 | return offset; | |
353 | } | |
354 | ||
355 | ||
356 | ||
357 | ||
358 | /* | |
359 | =for apidoc pad_alloc | |
360 | ||
361 | Allocate a new my or tmp pad entry. For a my, simply push a null SV onto | |
362 | the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards | |
363 | for a slot which has no name and and no active value. | |
364 | ||
365 | =cut | |
366 | */ | |
367 | ||
368 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
369 | * or at least rationalise ??? */ | |
370 | ||
371 | ||
372 | PADOFFSET | |
373 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
374 | { | |
375 | SV *sv; | |
376 | I32 retval; | |
377 | ||
f3548bdc DM |
378 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
379 | ||
dd2155a4 DM |
380 | if (AvARRAY(PL_comppad) != PL_curpad) |
381 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
382 | if (PL_pad_reset_pending) | |
383 | pad_reset(); | |
384 | if (tmptype & SVs_PADMY) { | |
235cc2e3 | 385 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
386 | retval = AvFILLp(PL_comppad); |
387 | } | |
388 | else { | |
389 | SV **names = AvARRAY(PL_comppad_name); | |
390 | SSize_t names_fill = AvFILLp(PL_comppad_name); | |
391 | for (;;) { | |
392 | /* | |
393 | * "foreach" index vars temporarily become aliases to non-"my" | |
394 | * values. Thus we must skip, not just pad values that are | |
395 | * marked as current pad values, but also those with names. | |
396 | */ | |
397 | /* HVDS why copy to sv here? we don't seem to use it */ | |
398 | if (++PL_padix <= names_fill && | |
399 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
400 | continue; | |
401 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
402 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
403 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
404 | break; | |
405 | } | |
406 | retval = PL_padix; | |
407 | } | |
408 | SvFLAGS(sv) |= tmptype; | |
409 | PL_curpad = AvARRAY(PL_comppad); | |
410 | ||
411 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
412 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
413 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
414 | PL_op_name[optype])); | |
415 | return (PADOFFSET)retval; | |
416 | } | |
417 | ||
418 | /* | |
419 | =for apidoc pad_add_anon | |
420 | ||
421 | Add an anon code entry to the current compiling pad | |
422 | ||
423 | =cut | |
424 | */ | |
425 | ||
426 | PADOFFSET | |
427 | Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type) | |
428 | { | |
429 | PADOFFSET ix; | |
430 | SV* name; | |
431 | ||
432 | name = NEWSV(1106, 0); | |
433 | sv_upgrade(name, SVt_PVNV); | |
434 | sv_setpvn(name, "&", 1); | |
435 | SvIVX(name) = -1; | |
436 | SvNVX(name) = 1; | |
437 | ix = pad_alloc(op_type, SVs_PADMY); | |
438 | av_store(PL_comppad_name, ix, name); | |
f3548bdc | 439 | /* XXX DAPM use PL_curpad[] ? */ |
dd2155a4 DM |
440 | av_store(PL_comppad, ix, sv); |
441 | SvPADMY_on(sv); | |
7dafbf52 DM |
442 | |
443 | /* to avoid ref loops, we never have parent + child referencing each | |
444 | * other simultaneously */ | |
445 | if (CvOUTSIDE((CV*)sv)) { | |
446 | assert(!CvWEAKOUTSIDE((CV*)sv)); | |
447 | CvWEAKOUTSIDE_on((CV*)sv); | |
448 | SvREFCNT_dec(CvOUTSIDE((CV*)sv)); | |
449 | } | |
dd2155a4 DM |
450 | return ix; |
451 | } | |
452 | ||
453 | ||
454 | ||
455 | /* | |
456 | =for apidoc pad_check_dup | |
457 | ||
458 | Check for duplicate declarations: report any of: | |
459 | * a my in the current scope with the same name; | |
460 | * an our (anywhere in the pad) with the same name and the same stash | |
461 | as C<ourstash> | |
462 | C<is_our> indicates that the name to check is an 'our' declaration | |
463 | ||
464 | =cut | |
465 | */ | |
466 | ||
467 | /* XXX DAPM integrate this into pad_add_name ??? */ | |
468 | ||
469 | void | |
470 | Perl_pad_check_dup(pTHX_ char *name, bool is_our, HV *ourstash) | |
471 | { | |
472 | SV **svp, *sv; | |
473 | PADOFFSET top, off; | |
474 | ||
f3548bdc | 475 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
dd2155a4 DM |
476 | if (!ckWARN(WARN_MISC) || AvFILLp(PL_comppad_name) < 0) |
477 | return; /* nothing to check */ | |
478 | ||
479 | svp = AvARRAY(PL_comppad_name); | |
480 | top = AvFILLp(PL_comppad_name); | |
481 | /* check the current scope */ | |
482 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
483 | * type ? */ | |
484 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
485 | if ((sv = svp[off]) | |
486 | && sv != &PL_sv_undef | |
ee6cee0c | 487 | && !SvFAKE(sv) |
dd2155a4 DM |
488 | && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0) |
489 | && (!is_our | |
490 | || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)) | |
491 | && strEQ(name, SvPVX(sv))) | |
492 | { | |
493 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
494 | "\"%s\" variable %s masks earlier declaration in same %s", | |
495 | (is_our ? "our" : "my"), | |
496 | name, | |
497 | (SvIVX(sv) == PAD_MAX ? "scope" : "statement")); | |
498 | --off; | |
499 | break; | |
500 | } | |
501 | } | |
502 | /* check the rest of the pad */ | |
503 | if (is_our) { | |
504 | do { | |
505 | if ((sv = svp[off]) | |
506 | && sv != &PL_sv_undef | |
ee6cee0c | 507 | && !SvFAKE(sv) |
dd2155a4 DM |
508 | && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0) |
509 | && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash) | |
510 | && strEQ(name, SvPVX(sv))) | |
511 | { | |
512 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
513 | "\"our\" variable %s redeclared", name); | |
514 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
515 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
516 | break; | |
517 | } | |
518 | } while ( off-- > 0 ); | |
519 | } | |
520 | } | |
521 | ||
522 | ||
dd2155a4 DM |
523 | /* |
524 | =for apidoc pad_findmy | |
525 | ||
526 | Given a lexical name, try to find its offset, first in the current pad, | |
527 | or failing that, in the pads of any lexically enclosing subs (including | |
528 | the complications introduced by eval). If the name is found in an outer pad, | |
529 | then a fake entry is added to the current pad. | |
530 | Returns the offset in the current pad, or NOT_IN_PAD on failure. | |
531 | ||
532 | =cut | |
533 | */ | |
534 | ||
535 | PADOFFSET | |
536 | Perl_pad_findmy(pTHX_ char *name) | |
537 | { | |
b5c19bd7 DM |
538 | SV *out_sv; |
539 | int out_flags; | |
dd2155a4 | 540 | |
b5c19bd7 DM |
541 | return pad_findlex(name, PL_compcv, PL_cop_seqmax, 1, |
542 | Null(SV**), &out_sv, &out_flags); | |
dd2155a4 DM |
543 | } |
544 | ||
545 | ||
dd2155a4 DM |
546 | /* |
547 | =for apidoc pad_findlex | |
548 | ||
549 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
550 | in the inner pads if it's found in an outer one. |
551 | ||
552 | Returns the offset in the bottom pad of the lex or the fake lex. | |
553 | cv is the CV in which to start the search, and seq is the current cop_seq | |
554 | to match against. If warn is true, print appropriate warnings. The out_* | |
555 | vars return values, and so are pointers to where the returned values | |
556 | should be stored. out_capture, if non-null, requests that the innermost | |
557 | instance of the lexical is captured; out_name_sv is set to the innermost | |
558 | matched namesv or fake namesv; out_flags returns the flags normally | |
559 | associated with the IVX field of a fake namesv. | |
560 | ||
561 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
562 | then comes back down, adding fake entries as it goes. It has to be this way | |
563 | because fake namesvs in anon protoypes have to store in NVX the index into | |
564 | the parent pad. | |
dd2155a4 DM |
565 | |
566 | =cut | |
567 | */ | |
568 | ||
b5c19bd7 DM |
569 | /* Flags set in the SvIVX field of FAKE namesvs */ |
570 | ||
571 | #define PAD_FAKELEX_ANON 1 /* the lex is declared in an ANON, or ... */ | |
572 | #define PAD_FAKELEX_MULTI 2 /* the lex can be instantiated multiple times */ | |
573 | ||
574 | /* the CV has finished being compiled. This is not a sufficient test for | |
575 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
576 | #define CvCOMPILED(cv) CvROOT(cv) | |
577 | ||
71f882da DM |
578 | /* the CV does late binding of its lexicals */ |
579 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
580 | ||
b5c19bd7 | 581 | |
dd2155a4 | 582 | STATIC PADOFFSET |
b5c19bd7 DM |
583 | S_pad_findlex(pTHX_ char *name, CV* cv, U32 seq, int warn, |
584 | SV** out_capture, SV** out_name_sv, int *out_flags) | |
dd2155a4 | 585 | { |
b5c19bd7 DM |
586 | I32 offset, new_offset; |
587 | SV *new_capture; | |
588 | SV **new_capturep; | |
589 | AV *padlist = CvPADLIST(cv); | |
dd2155a4 | 590 | |
b5c19bd7 | 591 | *out_flags = 0; |
a3985cdc | 592 | |
b5c19bd7 DM |
593 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
594 | "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n", | |
595 | PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" )); | |
dd2155a4 | 596 | |
b5c19bd7 | 597 | /* first, search this pad */ |
dd2155a4 | 598 | |
b5c19bd7 DM |
599 | if (padlist) { /* not an undef CV */ |
600 | I32 fake_offset = 0; | |
601 | AV *nameav = (AV*)AvARRAY(padlist)[0]; | |
602 | SV **name_svp = AvARRAY(nameav); | |
ee6cee0c | 603 | |
b5c19bd7 DM |
604 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
605 | SV *namesv = name_svp[offset]; | |
606 | if (namesv && namesv != &PL_sv_undef | |
607 | && strEQ(SvPVX(namesv), name)) | |
608 | { | |
609 | if (SvFAKE(namesv)) | |
610 | fake_offset = offset; /* in case we don't find a real one */ | |
611 | else if ( seq > (U32)I_32(SvNVX(namesv)) /* min */ | |
612 | && seq <= (U32)SvIVX(namesv)) /* max */ | |
613 | break; | |
ee6cee0c DM |
614 | } |
615 | } | |
616 | ||
b5c19bd7 DM |
617 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
618 | if (offset > 0) { /* not fake */ | |
619 | fake_offset = 0; | |
620 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
621 | ||
622 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
623 | * instances. For now, we just test !CvUNIQUE(cv), but | |
624 | * ideally, we should detect my's declared within loops | |
625 | * etc - this would allow a wider range of 'not stayed | |
626 | * shared' warnings. We also treated alreadly-compiled | |
627 | * lexes as not multi as viewed from evals. */ | |
628 | ||
629 | *out_flags = CvANON(cv) ? | |
630 | PAD_FAKELEX_ANON : | |
631 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
632 | ? PAD_FAKELEX_MULTI : 0; | |
633 | ||
634 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
635 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%ld,%ld)\n", | |
636 | PTR2UV(cv), (long)offset, (long)I_32(SvNVX(*out_name_sv)), | |
637 | (long)SvIVX(*out_name_sv))); | |
638 | } | |
639 | else { /* fake match */ | |
640 | offset = fake_offset; | |
641 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
642 | *out_flags = SvIVX(*out_name_sv); | |
643 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
644 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%x index=%lu\n", | |
645 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, | |
646 | (unsigned long)SvNVX(*out_name_sv) | |
647 | )); | |
648 | } | |
dd2155a4 | 649 | |
b5c19bd7 | 650 | /* return the lex? */ |
dd2155a4 | 651 | |
b5c19bd7 | 652 | if (out_capture) { |
dd2155a4 | 653 | |
b5c19bd7 DM |
654 | /* our ? */ |
655 | if ((SvFLAGS(*out_name_sv) & SVpad_OUR)) { | |
656 | *out_capture = Nullsv; | |
657 | return offset; | |
658 | } | |
ee6cee0c | 659 | |
b5c19bd7 DM |
660 | /* trying to capture from an anon prototype? */ |
661 | if (CvCOMPILED(cv) | |
662 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
663 | : *out_flags & PAD_FAKELEX_ANON) | |
664 | { | |
665 | if (warn && ckWARN(WARN_CLOSURE)) | |
666 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
667 | "Variable \"%s\" is not available", name); | |
668 | *out_capture = Nullsv; | |
669 | } | |
ee6cee0c | 670 | |
b5c19bd7 DM |
671 | /* real value */ |
672 | else { | |
673 | int newwarn = warn; | |
674 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
675 | && warn && ckWARN(WARN_CLOSURE)) { | |
676 | newwarn = 0; | |
677 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
678 | "Variable \"%s\" will not stay shared", name); | |
679 | } | |
dd2155a4 | 680 | |
b5c19bd7 DM |
681 | if (fake_offset && CvANON(cv) |
682 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
683 | { | |
684 | SV *n; | |
685 | /* not yet caught - look further up */ | |
686 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
687 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
688 | PTR2UV(cv))); | |
689 | n = *out_name_sv; | |
690 | pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), | |
691 | newwarn, out_capture, out_name_sv, out_flags); | |
692 | *out_name_sv = n; | |
693 | return offset; | |
dd2155a4 | 694 | } |
b5c19bd7 DM |
695 | |
696 | *out_capture = AvARRAY((AV*)AvARRAY(padlist)[ | |
697 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; | |
698 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
699 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
700 | PTR2UV(cv), *out_capture)); | |
701 | ||
702 | if (SvPADSTALE(*out_capture)) { | |
703 | if (ckWARN(WARN_CLOSURE)) | |
ee6cee0c | 704 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
b5c19bd7 DM |
705 | "Variable \"%s\" is not available", name); |
706 | *out_capture = Nullsv; | |
dd2155a4 DM |
707 | } |
708 | } | |
b5c19bd7 DM |
709 | if (!*out_capture) { |
710 | if (*name == '@') | |
711 | *out_capture = sv_2mortal((SV*)newAV()); | |
712 | else if (*name == '%') | |
713 | *out_capture = sv_2mortal((SV*)newHV()); | |
714 | else | |
715 | *out_capture = sv_newmortal(); | |
716 | } | |
dd2155a4 | 717 | } |
b5c19bd7 DM |
718 | |
719 | return offset; | |
ee6cee0c | 720 | } |
b5c19bd7 DM |
721 | } |
722 | ||
723 | /* it's not in this pad - try above */ | |
724 | ||
725 | if (!CvOUTSIDE(cv)) | |
726 | return NOT_IN_PAD; | |
727 | ||
728 | /* out_capture non-null means caller wants us to capture lex; in | |
71f882da | 729 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 730 | new_capturep = out_capture ? out_capture : |
71f882da | 731 | CvLATE(cv) ? Null(SV**) : &new_capture; |
b5c19bd7 DM |
732 | |
733 | offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
734 | new_capturep, out_name_sv, out_flags); | |
735 | if (offset == NOT_IN_PAD) | |
736 | return NOT_IN_PAD; | |
737 | ||
738 | /* found in an outer CV. Add appropriate fake entry to this pad */ | |
739 | ||
740 | /* don't add new fake entries (via eval) to CVs that we have already | |
741 | * finished compiling, or to undef CVs */ | |
742 | if (CvCOMPILED(cv) || !padlist) | |
743 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
744 | ||
745 | { | |
746 | SV *new_namesv; | |
747 | AV *ocomppad_name = PL_comppad_name; | |
748 | PAD *ocomppad = PL_comppad; | |
749 | PL_comppad_name = (AV*)AvARRAY(padlist)[0]; | |
750 | PL_comppad = (AV*)AvARRAY(padlist)[1]; | |
751 | PL_curpad = AvARRAY(PL_comppad); | |
752 | ||
753 | new_offset = pad_add_name( | |
754 | SvPVX(*out_name_sv), | |
755 | (SvFLAGS(*out_name_sv) & SVpad_TYPED) | |
756 | ? SvSTASH(*out_name_sv) : Nullhv, | |
757 | (SvFLAGS(*out_name_sv) & SVpad_OUR) | |
758 | ? GvSTASH(*out_name_sv) : Nullhv, | |
759 | 1 /* fake */ | |
760 | ); | |
761 | ||
762 | new_namesv = AvARRAY(PL_comppad_name)[new_offset]; | |
763 | SvIVX(new_namesv) = *out_flags; | |
764 | ||
765 | SvNVX(new_namesv) = (NV)0; | |
766 | if (SvFLAGS(new_namesv) & SVpad_OUR) { | |
767 | /* do nothing */ | |
768 | } | |
71f882da | 769 | else if (CvLATE(cv)) { |
b5c19bd7 DM |
770 | /* delayed creation - just note the offset within parent pad */ |
771 | SvNVX(new_namesv) = (NV)offset; | |
772 | CvCLONE_on(cv); | |
773 | } | |
774 | else { | |
775 | /* immediate creation - capture outer value right now */ | |
776 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
777 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
778 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
779 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 780 | } |
b5c19bd7 DM |
781 | *out_name_sv = new_namesv; |
782 | *out_flags = SvIVX(new_namesv); | |
783 | ||
784 | PL_comppad_name = ocomppad_name; | |
785 | PL_comppad = ocomppad; | |
786 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : Null(SV **); | |
dd2155a4 | 787 | } |
b5c19bd7 | 788 | return new_offset; |
dd2155a4 DM |
789 | } |
790 | ||
b5c19bd7 | 791 | |
dd2155a4 DM |
792 | /* |
793 | =for apidoc pad_sv | |
794 | ||
795 | Get the value at offset po in the current pad. | |
796 | Use macro PAD_SV instead of calling this function directly. | |
797 | ||
798 | =cut | |
799 | */ | |
800 | ||
801 | ||
802 | SV * | |
803 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
804 | { | |
f3548bdc | 805 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 806 | |
dd2155a4 DM |
807 | if (!po) |
808 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
809 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
810 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 811 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
812 | ); |
813 | return PL_curpad[po]; | |
814 | } | |
815 | ||
816 | ||
817 | /* | |
818 | =for apidoc pad_setsv | |
819 | ||
820 | Set the entry at offset po in the current pad to sv. | |
821 | Use the macro PAD_SETSV() rather than calling this function directly. | |
822 | ||
823 | =cut | |
824 | */ | |
825 | ||
826 | #ifdef DEBUGGING | |
827 | void | |
828 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
829 | { | |
f3548bdc | 830 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
831 | |
832 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
833 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 834 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
835 | ); |
836 | PL_curpad[po] = sv; | |
837 | } | |
838 | #endif | |
839 | ||
840 | ||
841 | ||
842 | /* | |
843 | =for apidoc pad_block_start | |
844 | ||
845 | Update the pad compilation state variables on entry to a new block | |
846 | ||
847 | =cut | |
848 | */ | |
849 | ||
850 | /* XXX DAPM perhaps: | |
851 | * - integrate this in general state-saving routine ??? | |
852 | * - combine with the state-saving going on in pad_new ??? | |
853 | * - introduce a new SAVE type that does all this in one go ? | |
854 | */ | |
855 | ||
856 | void | |
857 | Perl_pad_block_start(pTHX_ int full) | |
858 | { | |
f3548bdc | 859 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
860 | SAVEI32(PL_comppad_name_floor); |
861 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
862 | if (full) | |
863 | PL_comppad_name_fill = PL_comppad_name_floor; | |
864 | if (PL_comppad_name_floor < 0) | |
865 | PL_comppad_name_floor = 0; | |
866 | SAVEI32(PL_min_intro_pending); | |
867 | SAVEI32(PL_max_intro_pending); | |
868 | PL_min_intro_pending = 0; | |
869 | SAVEI32(PL_comppad_name_fill); | |
870 | SAVEI32(PL_padix_floor); | |
871 | PL_padix_floor = PL_padix; | |
872 | PL_pad_reset_pending = FALSE; | |
873 | } | |
874 | ||
875 | ||
876 | /* | |
877 | =for apidoc intro_my | |
878 | ||
879 | "Introduce" my variables to visible status. | |
880 | ||
881 | =cut | |
882 | */ | |
883 | ||
884 | U32 | |
885 | Perl_intro_my(pTHX) | |
886 | { | |
887 | SV **svp; | |
888 | SV *sv; | |
889 | I32 i; | |
890 | ||
f3548bdc | 891 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
892 | if (! PL_min_intro_pending) |
893 | return PL_cop_seqmax; | |
894 | ||
895 | svp = AvARRAY(PL_comppad_name); | |
896 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
ee6cee0c DM |
897 | if ((sv = svp[i]) && sv != &PL_sv_undef |
898 | && !SvFAKE(sv) && !SvIVX(sv)) | |
899 | { | |
dd2155a4 DM |
900 | SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */ |
901 | SvNVX(sv) = (NV)PL_cop_seqmax; | |
902 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 903 | "Pad intromy: %ld \"%s\", (%ld,%ld)\n", |
dd2155a4 | 904 | (long)i, SvPVX(sv), |
b5c19bd7 | 905 | (long)I_32(SvNVX(sv)), (long)SvIVX(sv)) |
dd2155a4 DM |
906 | ); |
907 | } | |
908 | } | |
909 | PL_min_intro_pending = 0; | |
910 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
911 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
912 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax+1))); | |
913 | ||
914 | return PL_cop_seqmax++; | |
915 | } | |
916 | ||
917 | /* | |
918 | =for apidoc pad_leavemy | |
919 | ||
920 | Cleanup at end of scope during compilation: set the max seq number for | |
921 | lexicals in this scope and warn of any lexicals that never got introduced. | |
922 | ||
923 | =cut | |
924 | */ | |
925 | ||
926 | void | |
927 | Perl_pad_leavemy(pTHX) | |
928 | { | |
929 | I32 off; | |
930 | SV **svp = AvARRAY(PL_comppad_name); | |
931 | SV *sv; | |
932 | ||
933 | PL_pad_reset_pending = FALSE; | |
934 | ||
f3548bdc | 935 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
936 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
937 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
ee6cee0c DM |
938 | if ((sv = svp[off]) && sv != &PL_sv_undef |
939 | && !SvFAKE(sv) && ckWARN_d(WARN_INTERNAL)) | |
dd2155a4 | 940 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
35c1215d | 941 | "%"SVf" never introduced", sv); |
dd2155a4 DM |
942 | } |
943 | } | |
944 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
945 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
ee6cee0c DM |
946 | if ((sv = svp[off]) && sv != &PL_sv_undef |
947 | && !SvFAKE(sv) && SvIVX(sv) == PAD_MAX) | |
948 | { | |
dd2155a4 DM |
949 | SvIVX(sv) = PL_cop_seqmax; |
950 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 951 | "Pad leavemy: %ld \"%s\", (%ld,%ld)\n", |
dd2155a4 | 952 | (long)off, SvPVX(sv), |
b5c19bd7 | 953 | (long)I_32(SvNVX(sv)), (long)SvIVX(sv)) |
dd2155a4 DM |
954 | ); |
955 | } | |
956 | } | |
957 | PL_cop_seqmax++; | |
958 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
959 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
960 | } | |
961 | ||
962 | ||
963 | /* | |
964 | =for apidoc pad_swipe | |
965 | ||
966 | Abandon the tmp in the current pad at offset po and replace with a | |
967 | new one. | |
968 | ||
969 | =cut | |
970 | */ | |
971 | ||
972 | void | |
973 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
974 | { | |
f3548bdc | 975 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
976 | if (!PL_curpad) |
977 | return; | |
978 | if (AvARRAY(PL_comppad) != PL_curpad) | |
979 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
980 | if (!po) | |
981 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
982 | ||
983 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
984 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
985 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
986 | ||
987 | if (PL_curpad[po]) | |
988 | SvPADTMP_off(PL_curpad[po]); | |
989 | if (refadjust) | |
990 | SvREFCNT_dec(PL_curpad[po]); | |
991 | ||
992 | PL_curpad[po] = NEWSV(1107,0); | |
993 | SvPADTMP_on(PL_curpad[po]); | |
994 | if ((I32)po < PL_padix) | |
995 | PL_padix = po - 1; | |
996 | } | |
997 | ||
998 | ||
999 | /* | |
1000 | =for apidoc pad_reset | |
1001 | ||
1002 | Mark all the current temporaries for reuse | |
1003 | ||
1004 | =cut | |
1005 | */ | |
1006 | ||
1007 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1008 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1009 | * on the stack by OPs that use them, there are several ways to get an alias | |
1010 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1011 | * We avoid doing this until we can think of a Better Way. | |
1012 | * GSAR 97-10-29 */ | |
1013 | void | |
1014 | Perl_pad_reset(pTHX) | |
1015 | { | |
1016 | #ifdef USE_BROKEN_PAD_RESET | |
1017 | register I32 po; | |
1018 | ||
1019 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1020 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1021 | ||
1022 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1023 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1024 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1025 | (long)PL_padix, (long)PL_padix_floor | |
1026 | ) | |
1027 | ); | |
1028 | ||
1029 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
1030 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { | |
1031 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1032 | SvPADTMP_off(PL_curpad[po]); | |
1033 | } | |
1034 | PL_padix = PL_padix_floor; | |
1035 | } | |
1036 | #endif | |
1037 | PL_pad_reset_pending = FALSE; | |
1038 | } | |
1039 | ||
1040 | ||
1041 | /* | |
1042 | =for apidoc pad_tidy | |
1043 | ||
1044 | Tidy up a pad after we've finished compiling it: | |
1045 | * remove most stuff from the pads of anonsub prototypes; | |
1046 | * give it a @_; | |
1047 | * mark tmps as such. | |
1048 | ||
1049 | =cut | |
1050 | */ | |
1051 | ||
1052 | /* XXX DAPM surely most of this stuff should be done properly | |
1053 | * at the right time beforehand, rather than going around afterwards | |
1054 | * cleaning up our mistakes ??? | |
1055 | */ | |
1056 | ||
1057 | void | |
1058 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1059 | { | |
1060 | PADOFFSET ix; | |
b5c19bd7 | 1061 | CV *cv; |
dd2155a4 | 1062 | |
f3548bdc | 1063 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1064 | |
1065 | /* If this CV has had any 'eval-capable' ops planted in it | |
1066 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1067 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1068 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1069 | * the right CvOUTSIDE. | |
1070 | * If running with -d, *any* sub may potentially have an eval | |
1071 | * excuted within it. | |
1072 | */ | |
1073 | ||
1074 | if (PL_cv_has_eval || PL_perldb) { | |
1075 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { | |
1076 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1077 | break; /* no need to mark already-compiled code */ | |
1078 | if (CvANON(cv)) { | |
1079 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1080 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1081 | CvCLONE_on(cv); | |
1082 | } | |
1083 | } | |
1084 | } | |
1085 | ||
dd2155a4 DM |
1086 | /* extend curpad to match namepad */ |
1087 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
1088 | av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv); | |
1089 | ||
1090 | if (type == padtidy_SUBCLONE) { | |
1091 | SV **namep = AvARRAY(PL_comppad_name); | |
b5c19bd7 | 1092 | |
dd2155a4 DM |
1093 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1094 | SV *namesv; | |
1095 | ||
1096 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1097 | continue; | |
1098 | /* | |
1099 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1100 | * pad are anonymous subs. |
dd2155a4 DM |
1101 | * The rest are created anew during cloning. |
1102 | */ | |
1103 | if (!((namesv = namep[ix]) != Nullsv && | |
1104 | namesv != &PL_sv_undef && | |
b5c19bd7 | 1105 | *SvPVX(namesv) == '&')) |
dd2155a4 DM |
1106 | { |
1107 | SvREFCNT_dec(PL_curpad[ix]); | |
1108 | PL_curpad[ix] = Nullsv; | |
1109 | } | |
1110 | } | |
1111 | } | |
1112 | else if (type == padtidy_SUB) { | |
1113 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
1114 | AV *av = newAV(); /* Will be @_ */ | |
1115 | av_extend(av, 0); | |
1116 | av_store(PL_comppad, 0, (SV*)av); | |
1117 | AvFLAGS(av) = AVf_REIFY; | |
1118 | } | |
1119 | ||
1120 | /* XXX DAPM rationalise these two similar branches */ | |
1121 | ||
1122 | if (type == padtidy_SUB) { | |
1123 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { | |
1124 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1125 | continue; | |
1126 | if (!SvPADMY(PL_curpad[ix])) | |
1127 | SvPADTMP_on(PL_curpad[ix]); | |
1128 | } | |
1129 | } | |
1130 | else if (type == padtidy_FORMAT) { | |
1131 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { | |
1132 | if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix])) | |
1133 | SvPADTMP_on(PL_curpad[ix]); | |
1134 | } | |
1135 | } | |
f3548bdc | 1136 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1137 | } |
1138 | ||
1139 | ||
1140 | /* | |
1141 | =for apidoc pad_free | |
1142 | ||
1143 | Free the SV at offet po in the current pad. | |
1144 | ||
1145 | =cut | |
1146 | */ | |
1147 | ||
1148 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1149 | void | |
1150 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1151 | { | |
f3548bdc | 1152 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1153 | if (!PL_curpad) |
1154 | return; | |
1155 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1156 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1157 | if (!po) | |
1158 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1159 | ||
1160 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1161 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1162 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1163 | ); | |
1164 | ||
1165 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1166 | SvPADTMP_off(PL_curpad[po]); | |
1167 | #ifdef USE_ITHREADS | |
7e736055 HS |
1168 | /* SV could be a shared hash key (eg bugid #19022) */ |
1169 | if ( | |
dd2155a4 | 1170 | #ifdef PERL_COPY_ON_WRITE |
7e736055 HS |
1171 | !SvIsCOW(PL_curpad[po]) |
1172 | #else | |
1173 | !SvFAKE(PL_curpad[po]) | |
dd2155a4 | 1174 | #endif |
7e736055 | 1175 | ) |
dd2155a4 | 1176 | SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */ |
dd2155a4 DM |
1177 | #endif |
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 | { | |
1196 | AV *pad_name; | |
1197 | AV *pad; | |
1198 | SV **pname; | |
1199 | SV **ppad; | |
1200 | SV *namesv; | |
1201 | I32 ix; | |
1202 | ||
1203 | if (!padlist) { | |
1204 | return; | |
1205 | } | |
1206 | pad_name = (AV*)*av_fetch((AV*)padlist, 0, FALSE); | |
1207 | pad = (AV*)*av_fetch((AV*)padlist, 1, FALSE); | |
1208 | pname = AvARRAY(pad_name); | |
1209 | ppad = AvARRAY(pad); | |
1210 | Perl_dump_indent(aTHX_ level, file, | |
1211 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1212 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1213 | ); | |
1214 | ||
1215 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
1216 | namesv = pname[ix]; | |
1217 | if (namesv && namesv == &PL_sv_undef) { | |
1218 | namesv = Nullsv; | |
1219 | } | |
1220 | if (namesv) { | |
ee6cee0c DM |
1221 | if (SvFAKE(namesv)) |
1222 | Perl_dump_indent(aTHX_ level+1, file, | |
b5c19bd7 | 1223 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%x index=%lu\n", |
ee6cee0c DM |
1224 | (int) ix, |
1225 | PTR2UV(ppad[ix]), | |
1226 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b5c19bd7 DM |
1227 | SvPVX(namesv), |
1228 | (unsigned long)SvIVX(namesv), | |
1229 | (unsigned long)SvNVX(namesv) | |
1230 | ||
ee6cee0c DM |
1231 | ); |
1232 | else | |
1233 | Perl_dump_indent(aTHX_ level+1, file, | |
b5c19bd7 | 1234 | "%2d. 0x%"UVxf"<%lu> (%ld,%ld) \"%s\"\n", |
ee6cee0c DM |
1235 | (int) ix, |
1236 | PTR2UV(ppad[ix]), | |
1237 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b5c19bd7 DM |
1238 | (long)I_32(SvNVX(namesv)), |
1239 | (long)SvIVX(namesv), | |
e9d09c08 | 1240 | SvPVX(namesv) |
ee6cee0c | 1241 | ); |
dd2155a4 DM |
1242 | } |
1243 | else if (full) { | |
1244 | Perl_dump_indent(aTHX_ level+1, file, | |
1245 | "%2d. 0x%"UVxf"<%lu>\n", | |
1246 | (int) ix, | |
1247 | PTR2UV(ppad[ix]), | |
1248 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1249 | ); | |
1250 | } | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | ||
1255 | ||
1256 | /* | |
1257 | =for apidoc cv_dump | |
1258 | ||
1259 | dump the contents of a CV | |
1260 | ||
1261 | =cut | |
1262 | */ | |
1263 | ||
1264 | #ifdef DEBUGGING | |
1265 | STATIC void | |
1266 | S_cv_dump(pTHX_ CV *cv, char *title) | |
1267 | { | |
1268 | CV *outside = CvOUTSIDE(cv); | |
1269 | AV* padlist = CvPADLIST(cv); | |
1270 | ||
1271 | PerlIO_printf(Perl_debug_log, | |
1272 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1273 | title, | |
1274 | PTR2UV(cv), | |
1275 | (CvANON(cv) ? "ANON" | |
71f882da | 1276 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1277 | : (cv == PL_main_cv) ? "MAIN" |
1278 | : CvUNIQUE(cv) ? "UNIQUE" | |
1279 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1280 | PTR2UV(outside), | |
1281 | (!outside ? "null" | |
1282 | : CvANON(outside) ? "ANON" | |
1283 | : (outside == PL_main_cv) ? "MAIN" | |
1284 | : CvUNIQUE(outside) ? "UNIQUE" | |
1285 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1286 | ||
1287 | PerlIO_printf(Perl_debug_log, | |
1288 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1289 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1290 | } | |
1291 | #endif /* DEBUGGING */ | |
1292 | ||
1293 | ||
1294 | ||
1295 | ||
1296 | ||
1297 | /* | |
1298 | =for apidoc cv_clone | |
1299 | ||
1300 | Clone a CV: make a new CV which points to the same code etc, but which | |
1301 | has a newly-created pad built by copying the prototype pad and capturing | |
1302 | any outer lexicals. | |
1303 | ||
1304 | =cut | |
1305 | */ | |
1306 | ||
1307 | CV * | |
1308 | Perl_cv_clone(pTHX_ CV *proto) | |
1309 | { | |
dd2155a4 DM |
1310 | I32 ix; |
1311 | AV* protopadlist = CvPADLIST(proto); | |
1312 | AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE); | |
1313 | AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE); | |
1314 | SV** pname = AvARRAY(protopad_name); | |
1315 | SV** ppad = AvARRAY(protopad); | |
1316 | I32 fname = AvFILLp(protopad_name); | |
1317 | I32 fpad = AvFILLp(protopad); | |
1318 | AV* comppadlist; | |
1319 | CV* cv; | |
b5c19bd7 DM |
1320 | SV** outpad; |
1321 | CV* outside; | |
71f882da | 1322 | long depth; |
dd2155a4 DM |
1323 | |
1324 | assert(!CvUNIQUE(proto)); | |
1325 | ||
71f882da DM |
1326 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1327 | * to a prototype; we instead want the cloned parent who called us. | |
1328 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1329 | ||
1330 | outside = CvOUTSIDE(proto); | |
1331 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1332 | outside = find_runcv(NULL); | |
1333 | depth = CvDEPTH(outside); | |
1334 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1335 | if (!depth) | |
1336 | depth = 1; | |
b5c19bd7 DM |
1337 | assert(CvPADLIST(outside)); |
1338 | ||
dd2155a4 DM |
1339 | ENTER; |
1340 | SAVESPTR(PL_compcv); | |
1341 | ||
1342 | cv = PL_compcv = (CV*)NEWSV(1104, 0); | |
1343 | sv_upgrade((SV *)cv, SvTYPE(proto)); | |
7dafbf52 | 1344 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE); |
dd2155a4 DM |
1345 | CvCLONED_on(cv); |
1346 | ||
dd2155a4 DM |
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); | |
1355 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
1356 | CvSTART(cv) = CvSTART(proto); | |
b5c19bd7 DM |
1357 | CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside); |
1358 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
dd2155a4 DM |
1359 | |
1360 | if (SvPOK(proto)) | |
1361 | sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto)); | |
1362 | ||
1363 | CvPADLIST(cv) = comppadlist = pad_new(padnew_CLONE|padnew_SAVE); | |
1364 | ||
b5c19bd7 | 1365 | av_fill(PL_comppad, fpad); |
dd2155a4 DM |
1366 | for (ix = fname; ix >= 0; ix--) |
1367 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); | |
1368 | ||
dd2155a4 DM |
1369 | PL_curpad = AvARRAY(PL_comppad); |
1370 | ||
71f882da | 1371 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1372 | |
dd2155a4 DM |
1373 | for (ix = fpad; ix > 0; ix--) { |
1374 | SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; | |
71f882da DM |
1375 | SV *sv = Nullsv; |
1376 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ | |
b5c19bd7 | 1377 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
71f882da DM |
1378 | sv = outpad[(I32)SvNVX(namesv)]; |
1379 | assert(sv); | |
1380 | /* formats may have an inactive parent */ | |
1381 | if (SvTYPE(proto) == SVt_PVFM && SvPADSTALE(sv)) { | |
1382 | if (ckWARN(WARN_CLOSURE)) | |
1383 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
1384 | "Variable \"%s\" is not available", SvPVX(namesv)); | |
1385 | sv = Nullsv; | |
1386 | } | |
1387 | else { | |
1388 | assert(!SvPADSTALE(sv)); | |
1389 | sv = SvREFCNT_inc(sv); | |
1390 | } | |
dd2155a4 | 1391 | } |
71f882da | 1392 | if (!sv) { |
b5c19bd7 DM |
1393 | char *name = SvPVX(namesv); |
1394 | if (*name == '&') | |
dd2155a4 | 1395 | sv = SvREFCNT_inc(ppad[ix]); |
dd2155a4 DM |
1396 | else if (*name == '@') |
1397 | sv = (SV*)newAV(); | |
1398 | else if (*name == '%') | |
1399 | sv = (SV*)newHV(); | |
1400 | else | |
1401 | sv = NEWSV(0, 0); | |
235cc2e3 | 1402 | SvPADMY_on(sv); |
dd2155a4 DM |
1403 | } |
1404 | } | |
1405 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
71f882da | 1406 | sv = SvREFCNT_inc(ppad[ix]); |
dd2155a4 DM |
1407 | } |
1408 | else { | |
b5c19bd7 | 1409 | sv = NEWSV(0, 0); |
dd2155a4 | 1410 | SvPADTMP_on(sv); |
dd2155a4 | 1411 | } |
71f882da | 1412 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1413 | } |
1414 | ||
dd2155a4 DM |
1415 | DEBUG_Xv( |
1416 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1417 | cv_dump(outside, "Outside"); | |
1418 | cv_dump(proto, "Proto"); | |
1419 | cv_dump(cv, "To"); | |
1420 | ); | |
1421 | ||
1422 | LEAVE; | |
1423 | ||
1424 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1425 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1426 | * The prototype was marked as a candiate for const-ization, | |
1427 | * so try to grab the current const value, and if successful, | |
1428 | * turn into a const sub: | |
1429 | */ | |
dd2155a4 | 1430 | SV* const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1431 | if (const_sv) { |
1432 | SvREFCNT_dec(cv); | |
1433 | cv = newCONSTSUB(CvSTASH(proto), 0, const_sv); | |
1434 | } | |
1435 | else { | |
1436 | CvCONST_off(cv); | |
1437 | } | |
dd2155a4 DM |
1438 | } |
1439 | ||
1440 | return cv; | |
1441 | } | |
1442 | ||
1443 | ||
1444 | /* | |
1445 | =for apidoc pad_fixup_inner_anons | |
1446 | ||
1447 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1448 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1449 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1450 | |
1451 | =cut | |
1452 | */ | |
1453 | ||
1454 | void | |
1455 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1456 | { | |
1457 | I32 ix; | |
1458 | AV *comppad_name = (AV*)AvARRAY(padlist)[0]; | |
1459 | AV *comppad = (AV*)AvARRAY(padlist)[1]; | |
1460 | SV **namepad = AvARRAY(comppad_name); | |
1461 | SV **curpad = AvARRAY(comppad); | |
1462 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
1463 | SV *namesv = namepad[ix]; | |
1464 | if (namesv && namesv != &PL_sv_undef | |
1465 | && *SvPVX(namesv) == '&') | |
1466 | { | |
1467 | CV *innercv = (CV*)curpad[ix]; | |
7dafbf52 DM |
1468 | assert(CvWEAKOUTSIDE(innercv)); |
1469 | assert(CvOUTSIDE(innercv) == old_cv); | |
1470 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
1471 | } |
1472 | } | |
1473 | } | |
1474 | ||
7dafbf52 | 1475 | |
dd2155a4 DM |
1476 | /* |
1477 | =for apidoc pad_push | |
1478 | ||
1479 | Push a new pad frame onto the padlist, unless there's already a pad at | |
1480 | this depth, in which case don't bother creating a new one. | |
1481 | If has_args is true, give the new pad an @_ in slot zero. | |
1482 | ||
1483 | =cut | |
1484 | */ | |
1485 | ||
1486 | void | |
1487 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth, int has_args) | |
1488 | { | |
1489 | if (depth <= AvFILLp(padlist)) | |
1490 | return; | |
1491 | ||
1492 | { | |
1493 | SV** svp = AvARRAY(padlist); | |
1494 | AV *newpad = newAV(); | |
1495 | SV **oldpad = AvARRAY(svp[depth-1]); | |
1496 | I32 ix = AvFILLp((AV*)svp[1]); | |
1497 | I32 names_fill = AvFILLp((AV*)svp[0]); | |
1498 | SV** names = AvARRAY(svp[0]); | |
1499 | SV* sv; | |
1500 | for ( ;ix > 0; ix--) { | |
1501 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
1502 | char *name = SvPVX(names[ix]); | |
1503 | if ((SvFLAGS(names[ix]) & SVf_FAKE) || *name == '&') { | |
1504 | /* outer lexical or anon code */ | |
1505 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
1506 | } | |
1507 | else { /* our own lexical */ | |
1508 | if (*name == '@') | |
1509 | av_store(newpad, ix, sv = (SV*)newAV()); | |
1510 | else if (*name == '%') | |
1511 | av_store(newpad, ix, sv = (SV*)newHV()); | |
1512 | else | |
1513 | av_store(newpad, ix, sv = NEWSV(0, 0)); | |
1514 | SvPADMY_on(sv); | |
1515 | } | |
1516 | } | |
1517 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
1518 | av_store(newpad, ix, sv = SvREFCNT_inc(oldpad[ix])); | |
1519 | } | |
1520 | else { | |
1521 | /* save temporaries on recursion? */ | |
1522 | av_store(newpad, ix, sv = NEWSV(0, 0)); | |
1523 | SvPADTMP_on(sv); | |
1524 | } | |
1525 | } | |
1526 | if (has_args) { | |
1527 | AV* av = newAV(); | |
1528 | av_extend(av, 0); | |
1529 | av_store(newpad, 0, (SV*)av); | |
1530 | AvFLAGS(av) = AVf_REIFY; | |
1531 | } | |
1532 | av_store(padlist, depth, (SV*)newpad); | |
1533 | AvFILLp(padlist) = depth; | |
1534 | } | |
1535 | } |