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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | * by Larry Wall and others | |
dd2155a4 DM |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
4ac71550 TC |
8 | */ |
9 | ||
10 | /* | |
11 | * 'Anyway: there was this Mr. Frodo left an orphan and stranded, as you | |
12 | * might say, among those queer Bucklanders, being brought up anyhow in | |
13 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
14 | * never had fewer than a couple of hundred relations in the place. | |
15 | * Mr. Bilbo never did a kinder deed than when he brought the lad back | |
16 | * to live among decent folk.' --the Gaffer | |
dd2155a4 | 17 | * |
4ac71550 | 18 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
dd2155a4 DM |
19 | */ |
20 | ||
21 | /* XXX DAPM | |
22 | * As of Sept 2002, this file is new and may be in a state of flux for | |
23 | * a while. I've marked things I intent to come back and look at further | |
24 | * with an 'XXX DAPM' comment. | |
25 | */ | |
26 | ||
27 | /* | |
28 | =head1 Pad Data Structures | |
29 | ||
cc76b5cc | 30 | =for apidoc Amx|PADLIST *|CvPADLIST|CV *cv |
166f8a29 | 31 | |
cc76b5cc Z |
32 | CV's can have CvPADLIST(cv) set to point to an AV. This is the CV's |
33 | scratchpad, which stores lexical variables and opcode temporary and | |
34 | per-thread values. | |
dd2155a4 DM |
35 | |
36 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
37 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
38 | executing). Require'd files are simply evals without any outer lexical |
39 | scope. | |
dd2155a4 DM |
40 | |
41 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
42 | but that is really the callers pad (a slot of which is allocated by | |
43 | every entersub). | |
44 | ||
45 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
f3548bdc | 46 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 DM |
47 | The items in the AV are not SVs as for a normal AV, but other AVs: |
48 | ||
49 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
50 | the "static type information" for lexicals. | |
51 | ||
52 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
53 | depth of recursion into the CV. | |
54 | The 0'th slot of a frame AV is an AV which is @_. | |
55 | other entries are storage for variables and op targets. | |
56 | ||
f3548bdc | 57 | Iterating over the names AV iterates over all possible pad |
dd2155a4 DM |
58 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
59 | &PL_sv_undef "names" (see pad_alloc()). | |
60 | ||
61 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
62 | The rest are op targets/GVs/constants which are statically allocated | |
63 | or resolved at compile time. These don't have names by which they | |
64 | can be looked up from Perl code at run time through eval"" like | |
65 | my/our variables can be. Since they can't be looked up by "name" | |
66 | but only by their index allocated at compile time (which is usually | |
67 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
68 | ||
69 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 70 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
71 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
72 | _HIGH). During compilation, these fields may hold the special value | |
73 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
74 | |
75 | COP_SEQ_RANGE_LOW _HIGH | |
76 | ----------------- ----- | |
77 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
78 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
79 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
80 | ||
81 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 82 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 83 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 84 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 85 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 86 | |
b5c19bd7 DM |
87 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
88 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
3441fb63 NC |
89 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
90 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 91 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 92 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
93 | within the parent's pad where the lexical's value is stored, to make |
94 | cloning quicker. | |
dd2155a4 | 95 | |
a6d05634 | 96 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
97 | is a CV representing a possible closure. |
98 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
99 | become so if C<my sub foo {}> is implemented.) | |
100 | ||
71f882da DM |
101 | Note that formats are treated as anon subs, and are cloned each time |
102 | write is called (if necessary). | |
103 | ||
ab8e66c1 | 104 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
e6e7068b DM |
105 | and set on scope exit. This allows the 'Variable $x is not available' warning |
106 | to be generated in evals, such as | |
107 | ||
108 | { my $x = 1; sub f { eval '$x'} } f(); | |
109 | ||
ab8e66c1 | 110 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised' |
d1186544 | 111 | |
cc76b5cc Z |
112 | =for apidoc AmxU|AV *|PL_comppad_name |
113 | ||
114 | During compilation, this points to the array containing the names part | |
115 | of the pad for the currently-compiling code. | |
116 | ||
117 | =for apidoc AmxU|AV *|PL_comppad | |
118 | ||
119 | During compilation, this points to the array containing the values | |
120 | part of the pad for the currently-compiling code. (At runtime a CV may | |
121 | have many such value arrays; at compile time just one is constructed.) | |
122 | At runtime, this points to the array containing the currently-relevant | |
123 | values for the pad for the currently-executing code. | |
124 | ||
125 | =for apidoc AmxU|SV **|PL_curpad | |
126 | ||
127 | Points directly to the body of the L</PL_comppad> array. | |
128 | (I.e., this is C<AvARRAY(PL_comppad)>.) | |
129 | ||
dd2155a4 DM |
130 | =cut |
131 | */ | |
132 | ||
133 | ||
134 | #include "EXTERN.h" | |
135 | #define PERL_IN_PAD_C | |
136 | #include "perl.h" | |
952306ac | 137 | #include "keywords.h" |
dd2155a4 | 138 | |
3441fb63 NC |
139 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
140 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
141 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
142 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 143 | |
3441fb63 NC |
144 | #define PARENT_PAD_INDEX_set(sv,val) \ |
145 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
146 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
147 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 148 | |
cc76b5cc Z |
149 | /* |
150 | =for apidoc mx|void|pad_peg|const char *s | |
151 | ||
152 | When PERL_MAD is enabled, this is a small no-op function that gets called | |
153 | at the start of each pad-related function. It can be breakpointed to | |
154 | track all pad operations. The parameter is a string indicating the type | |
155 | of pad operation being performed. | |
156 | ||
157 | =cut | |
158 | */ | |
159 | ||
1dba731d NC |
160 | #ifdef PERL_MAD |
161 | void pad_peg(const char* s) { | |
790427a5 DM |
162 | static int pegcnt; /* XXX not threadsafe */ |
163 | PERL_UNUSED_ARG(s); | |
7918f24d NC |
164 | |
165 | PERL_ARGS_ASSERT_PAD_PEG; | |
166 | ||
1dba731d NC |
167 | pegcnt++; |
168 | } | |
169 | #endif | |
dd2155a4 DM |
170 | |
171 | /* | |
5b16296c BF |
172 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
173 | and bytes checking. | |
174 | */ | |
175 | ||
76d60a53 NC |
176 | static bool |
177 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
178 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
179 | const char *pv1 = SvPVX_const(sv); | |
180 | STRLEN cur1 = SvCUR(sv); | |
181 | const char *pv2 = pv; | |
182 | STRLEN cur2 = pvlen; | |
183 | if (PL_encoding) { | |
184 | SV* svrecode = NULL; | |
185 | if (SvUTF8(sv)) { | |
186 | svrecode = newSVpvn(pv2, cur2); | |
187 | sv_recode_to_utf8(svrecode, PL_encoding); | |
188 | pv2 = SvPV_const(svrecode, cur2); | |
189 | } | |
190 | else { | |
191 | svrecode = newSVpvn(pv1, cur1); | |
192 | sv_recode_to_utf8(svrecode, PL_encoding); | |
193 | pv1 = SvPV_const(svrecode, cur1); | |
194 | } | |
195 | SvREFCNT_dec(svrecode); | |
196 | } | |
197 | if (flags & SVf_UTF8) | |
198 | return (bytes_cmp_utf8( | |
199 | (const U8*)pv1, cur1, | |
200 | (const U8*)pv2, cur2) == 0); | |
201 | else | |
202 | return (bytes_cmp_utf8( | |
203 | (const U8*)pv2, cur2, | |
204 | (const U8*)pv1, cur1) == 0); | |
205 | } | |
206 | else | |
207 | return ((SvPVX_const(sv) == pv) | |
208 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
209 | } | |
210 | ||
211 | ||
212 | /* | |
cc76b5cc | 213 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 214 | |
cc76b5cc Z |
215 | Create a new padlist, updating the global variables for the |
216 | currently-compiling padlist to point to the new padlist. The following | |
217 | flags can be OR'ed together: | |
dd2155a4 DM |
218 | |
219 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 220 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
221 | padnew_SAVESUB also save extra stuff for start of sub |
222 | ||
223 | =cut | |
224 | */ | |
225 | ||
226 | PADLIST * | |
c7c737cb | 227 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 228 | { |
97aff369 | 229 | dVAR; |
e1ec3a88 | 230 | AV *padlist, *padname, *pad; |
7a6072a8 | 231 | SV **ary; |
dd2155a4 | 232 | |
f3548bdc DM |
233 | ASSERT_CURPAD_LEGAL("pad_new"); |
234 | ||
dd2155a4 DM |
235 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
236 | * vars (based on flags) rather than storing vals + addresses for | |
237 | * each individually. Also see pad_block_start. | |
238 | * XXX DAPM Try to see whether all these conditionals are required | |
239 | */ | |
240 | ||
241 | /* save existing state, ... */ | |
242 | ||
243 | if (flags & padnew_SAVE) { | |
3979c56f | 244 | SAVECOMPPAD(); |
dd2155a4 DM |
245 | SAVESPTR(PL_comppad_name); |
246 | if (! (flags & padnew_CLONE)) { | |
247 | SAVEI32(PL_padix); | |
248 | SAVEI32(PL_comppad_name_fill); | |
249 | SAVEI32(PL_min_intro_pending); | |
250 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 251 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 252 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 253 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
254 | } |
255 | } | |
256 | } | |
257 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
258 | * saved - check at some pt that this is okay */ | |
259 | ||
260 | /* ... create new pad ... */ | |
261 | ||
262 | padlist = newAV(); | |
263 | padname = newAV(); | |
264 | pad = newAV(); | |
265 | ||
266 | if (flags & padnew_CLONE) { | |
267 | /* XXX DAPM I dont know why cv_clone needs it | |
268 | * doing differently yet - perhaps this separate branch can be | |
269 | * dispensed with eventually ??? | |
270 | */ | |
271 | ||
e1ec3a88 | 272 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 273 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 274 | AvREIFY_only(a0); |
dd2155a4 DM |
275 | } |
276 | else { | |
a0714e2c | 277 | av_store(pad, 0, NULL); |
dd2155a4 DM |
278 | } |
279 | ||
280 | AvREAL_off(padlist); | |
7a6072a8 NC |
281 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
282 | array - names, and depth=1. The default for av_store() is to allocate | |
283 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
284 | up, so we inline the allocation of the array here. */ | |
285 | Newx(ary, 2, SV*); | |
286 | AvFILLp(padlist) = 1; | |
287 | AvMAX(padlist) = 1; | |
288 | AvALLOC(padlist) = ary; | |
289 | AvARRAY(padlist) = ary; | |
290 | ary[0] = MUTABLE_SV(padname); | |
291 | ary[1] = MUTABLE_SV(pad); | |
dd2155a4 DM |
292 | |
293 | /* ... then update state variables */ | |
294 | ||
403799bf NC |
295 | PL_comppad_name = padname; |
296 | PL_comppad = pad; | |
297 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
298 | |
299 | if (! (flags & padnew_CLONE)) { | |
300 | PL_comppad_name_fill = 0; | |
301 | PL_min_intro_pending = 0; | |
302 | PL_padix = 0; | |
b5c19bd7 | 303 | PL_cv_has_eval = 0; |
dd2155a4 DM |
304 | } |
305 | ||
306 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 307 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 308 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 309 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
310 | PTR2UV(padname), (UV)flags |
311 | ) | |
312 | ); | |
313 | ||
314 | return (PADLIST*)padlist; | |
315 | } | |
316 | ||
dd2155a4 | 317 | |
c4528262 NC |
318 | /* |
319 | =head1 Embedding Functions | |
320 | ||
321 | =for apidoc cv_undef | |
322 | ||
323 | Clear out all the active components of a CV. This can happen either | |
324 | by an explicit C<undef &foo>, or by the reference count going to zero. | |
325 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
326 | children can still follow the full lexical scope chain. | |
327 | ||
328 | =cut | |
329 | */ | |
330 | ||
331 | void | |
332 | Perl_cv_undef(pTHX_ CV *cv) | |
333 | { | |
334 | dVAR; | |
c2736fce | 335 | const PADLIST *padlist = CvPADLIST(cv); |
c4528262 NC |
336 | |
337 | PERL_ARGS_ASSERT_CV_UNDEF; | |
338 | ||
339 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
340 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
341 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
342 | ); | |
343 | ||
bad4ae38 | 344 | if (CvFILE(cv) && CvDYNFILE(cv)) { |
c4528262 NC |
345 | Safefree(CvFILE(cv)); |
346 | } | |
347 | CvFILE(cv) = NULL; | |
dd2155a4 | 348 | |
c4528262 NC |
349 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
350 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
351 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
352 | ENTER; | |
353 | ||
354 | PAD_SAVE_SETNULLPAD(); | |
355 | ||
356 | op_free(CvROOT(cv)); | |
357 | CvROOT(cv) = NULL; | |
358 | CvSTART(cv) = NULL; | |
359 | LEAVE; | |
360 | } | |
361 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ | |
362 | CvGV_set(cv, NULL); | |
363 | ||
c2736fce NC |
364 | /* This statement and the subsequence if block was pad_undef(). */ |
365 | pad_peg("pad_undef"); | |
366 | ||
367 | if (padlist && !SvIS_FREED(padlist) /* may be during global destruction */ | |
368 | ) { | |
369 | I32 ix; | |
370 | ||
371 | /* Free the padlist associated with a CV. | |
372 | If parts of it happen to be current, we null the relevant PL_*pad* | |
373 | global vars so that we don't have any dangling references left. | |
374 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
375 | subs to the outer of this cv. */ | |
376 | ||
377 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
378 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
379 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
380 | ); | |
381 | ||
382 | /* detach any '&' anon children in the pad; if afterwards they | |
383 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
384 | * bypassing us. */ | |
385 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
386 | * children, or integrate this loop with general cleanup */ | |
387 | ||
388 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
389 | CV * const outercv = CvOUTSIDE(cv); | |
390 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
391 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); | |
392 | SV ** const namepad = AvARRAY(comppad_name); | |
393 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
394 | SV ** const curpad = AvARRAY(comppad); | |
395 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
396 | SV * const namesv = namepad[ix]; | |
397 | if (namesv && namesv != &PL_sv_undef | |
398 | && *SvPVX_const(namesv) == '&') | |
399 | { | |
400 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
401 | U32 inner_rc = SvREFCNT(innercv); | |
402 | assert(inner_rc); | |
403 | namepad[ix] = NULL; | |
404 | SvREFCNT_dec(namesv); | |
405 | ||
406 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
407 | curpad[ix] = NULL; | |
408 | SvREFCNT_dec(innercv); | |
409 | inner_rc--; | |
410 | } | |
411 | ||
412 | /* in use, not just a prototype */ | |
413 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
414 | assert(CvWEAKOUTSIDE(innercv)); | |
415 | /* don't relink to grandfather if he's being freed */ | |
416 | if (outercv && SvREFCNT(outercv)) { | |
417 | CvWEAKOUTSIDE_off(innercv); | |
418 | CvOUTSIDE(innercv) = outercv; | |
419 | CvOUTSIDE_SEQ(innercv) = seq; | |
420 | SvREFCNT_inc_simple_void_NN(outercv); | |
421 | } | |
422 | else { | |
423 | CvOUTSIDE(innercv) = NULL; | |
424 | } | |
425 | } | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | ix = AvFILLp(padlist); | |
aa2f79cf | 431 | while (ix > 0) { |
c2736fce NC |
432 | SV* const sv = AvARRAY(padlist)[ix--]; |
433 | if (sv) { | |
aa2f79cf | 434 | if (sv == (const SV *)PL_comppad) { |
c2736fce NC |
435 | PL_comppad = NULL; |
436 | PL_curpad = NULL; | |
437 | } | |
aa2f79cf | 438 | SvREFCNT_dec(sv); |
c2736fce | 439 | } |
aa2f79cf NC |
440 | } |
441 | { | |
442 | SV *const sv = AvARRAY(padlist)[0]; | |
443 | if (sv == (const SV *)PL_comppad_name) | |
444 | PL_comppad_name = NULL; | |
c2736fce NC |
445 | SvREFCNT_dec(sv); |
446 | } | |
447 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); | |
448 | CvPADLIST(cv) = NULL; | |
449 | } | |
450 | ||
c4528262 NC |
451 | |
452 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
453 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
454 | if (!CvWEAKOUTSIDE(cv)) | |
455 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
456 | CvOUTSIDE(cv) = NULL; | |
457 | } | |
458 | if (CvCONST(cv)) { | |
459 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
460 | CvCONST_off(cv); | |
461 | } | |
462 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
463 | CvXSUB(cv) = NULL; | |
464 | } | |
465 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
2c374370 FC |
466 | * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses |
467 | * to choose an error message */ | |
468 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON); | |
c4528262 | 469 | } |
dd2155a4 | 470 | |
cc76b5cc Z |
471 | /* |
472 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
473 | ||
1a115e49 FC |
474 | Allocates a place in the currently-compiling |
475 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
476 | then stores a name for that entry. I<namesv> is adopted and becomes the |
477 | name entry; it must already contain the name string and be sufficiently | |
478 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
479 | added to I<namesv>. None of the other |
480 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
481 | is done. Returns the offset of the allocated pad slot. |
482 | ||
483 | =cut | |
484 | */ | |
485 | ||
3291825f | 486 | static PADOFFSET |
cc76b5cc | 487 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f NC |
488 | { |
489 | dVAR; | |
490 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
491 | ||
cc76b5cc | 492 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 493 | |
cc76b5cc | 494 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
495 | |
496 | if (typestash) { | |
497 | assert(SvTYPE(namesv) == SVt_PVMG); | |
498 | SvPAD_TYPED_on(namesv); | |
499 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
500 | } | |
501 | if (ourstash) { | |
502 | SvPAD_OUR_on(namesv); | |
503 | SvOURSTASH_set(namesv, ourstash); | |
504 | SvREFCNT_inc_simple_void_NN(ourstash); | |
505 | } | |
59cfed7d | 506 | else if (flags & padadd_STATE) { |
3291825f NC |
507 | SvPAD_STATE_on(namesv); |
508 | } | |
509 | ||
510 | av_store(PL_comppad_name, offset, namesv); | |
511 | return offset; | |
512 | } | |
513 | ||
dd2155a4 | 514 | /* |
cc76b5cc | 515 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 516 | |
cc76b5cc Z |
517 | Allocates a place in the currently-compiling pad for a named lexical |
518 | variable. Stores the name and other metadata in the name part of the | |
519 | pad, and makes preparations to manage the variable's lexical scoping. | |
520 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 521 | |
cc76b5cc Z |
522 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
523 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
524 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
525 | to a package variable, and this identifies the package. The following | |
526 | flags can be OR'ed together: | |
527 | ||
528 | padadd_OUR redundantly specifies if it's a package var | |
529 | padadd_STATE variable will retain value persistently | |
530 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
531 | |
532 | =cut | |
533 | */ | |
534 | ||
dd2155a4 | 535 | PADOFFSET |
cc76b5cc Z |
536 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
537 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 538 | { |
97aff369 | 539 | dVAR; |
3291825f | 540 | PADOFFSET offset; |
cca43f78 | 541 | SV *namesv; |
e8b34487 | 542 | bool is_utf8; |
dd2155a4 | 543 | |
cc76b5cc | 544 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 545 | |
2435e5d3 | 546 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 547 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
548 | (UV)flags); |
549 | ||
550 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
551 | |
552 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
553 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
554 | } | |
555 | ||
0727928e BF |
556 | sv_setpvn(namesv, namepv, namelen); |
557 | ||
e8b34487 BF |
558 | if (is_utf8) { |
559 | flags |= padadd_UTF8_NAME; | |
560 | SvUTF8_on(namesv); | |
561 | } | |
562 | else | |
563 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 564 | |
59cfed7d | 565 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
2d12d04f | 566 | /* check for duplicate declaration */ |
59cfed7d | 567 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
2d12d04f NC |
568 | } |
569 | ||
2435e5d3 | 570 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
571 | |
572 | /* not yet introduced */ | |
2df5bdd7 DM |
573 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
574 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
575 | |
576 | if (!PL_min_intro_pending) | |
577 | PL_min_intro_pending = offset; | |
578 | PL_max_intro_pending = offset; | |
579 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
580 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
581 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 582 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 583 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 584 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 NC |
585 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
586 | assert(SvPADMY(PL_curpad[offset])); | |
3291825f NC |
587 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
588 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
589 | (long)offset, SvPVX(namesv), |
590 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
591 | |
592 | return offset; | |
593 | } | |
594 | ||
cc76b5cc Z |
595 | /* |
596 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 597 | |
cc76b5cc Z |
598 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
599 | instead of a string/length pair. | |
dd2155a4 | 600 | |
cc76b5cc Z |
601 | =cut |
602 | */ | |
603 | ||
604 | PADOFFSET | |
605 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 606 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
607 | { |
608 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
609 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
610 | } | |
dd2155a4 DM |
611 | |
612 | /* | |
cc76b5cc | 613 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 614 | |
cc76b5cc Z |
615 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
616 | of an SV instead of a string/length pair. | |
617 | ||
618 | =cut | |
619 | */ | |
620 | ||
621 | PADOFFSET | |
622 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
623 | { | |
624 | char *namepv; | |
625 | STRLEN namelen; | |
626 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
627 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
628 | if (SvUTF8(name)) |
629 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
630 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
631 | } | |
632 | ||
633 | /* | |
634 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
635 | ||
636 | Allocates a place in the currently-compiling pad, | |
637 | returning the offset of the allocated pad slot. | |
638 | No name is initially attached to the pad slot. | |
639 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
640 | which will be set in the value SV for the allocated pad entry: | |
641 | ||
642 | SVs_PADMY named lexical variable ("my", "our", "state") | |
643 | SVs_PADTMP unnamed temporary store | |
644 | ||
645 | I<optype> should be an opcode indicating the type of operation that the | |
646 | pad entry is to support. This doesn't affect operational semantics, | |
647 | but is used for debugging. | |
dd2155a4 DM |
648 | |
649 | =cut | |
650 | */ | |
651 | ||
652 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
653 | * or at least rationalise ??? */ | |
6d640399 NC |
654 | /* And flag whether the incoming name is UTF8 or 8 bit? |
655 | Could do this either with the +ve/-ve hack of the HV code, or expanding | |
656 | the flag bits. Either way, this makes proper Unicode safe pad support. | |
6d640399 NC |
657 | NWC |
658 | */ | |
dd2155a4 DM |
659 | |
660 | PADOFFSET | |
661 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
662 | { | |
97aff369 | 663 | dVAR; |
dd2155a4 DM |
664 | SV *sv; |
665 | I32 retval; | |
666 | ||
6136c704 | 667 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
668 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
669 | ||
dd2155a4 DM |
670 | if (AvARRAY(PL_comppad) != PL_curpad) |
671 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
672 | if (PL_pad_reset_pending) | |
673 | pad_reset(); | |
674 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 675 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 676 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
677 | retval = AvFILLp(PL_comppad); |
678 | } | |
679 | else { | |
cc76b5cc Z |
680 | /* For a tmp, scan the pad from PL_padix upwards |
681 | * for a slot which has no name and no active value. | |
682 | */ | |
551405c4 | 683 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 684 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
685 | for (;;) { |
686 | /* | |
687 | * "foreach" index vars temporarily become aliases to non-"my" | |
688 | * values. Thus we must skip, not just pad values that are | |
689 | * marked as current pad values, but also those with names. | |
690 | */ | |
691 | /* HVDS why copy to sv here? we don't seem to use it */ | |
692 | if (++PL_padix <= names_fill && | |
693 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
694 | continue; | |
695 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
696 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
697 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
698 | break; | |
699 | } | |
700 | retval = PL_padix; | |
701 | } | |
702 | SvFLAGS(sv) |= tmptype; | |
703 | PL_curpad = AvARRAY(PL_comppad); | |
704 | ||
705 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
706 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
707 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
708 | PL_op_name[optype])); | |
fd0854ff DM |
709 | #ifdef DEBUG_LEAKING_SCALARS |
710 | sv->sv_debug_optype = optype; | |
711 | sv->sv_debug_inpad = 1; | |
fd0854ff | 712 | #endif |
a212c8b5 | 713 | return (PADOFFSET)retval; |
dd2155a4 DM |
714 | } |
715 | ||
716 | /* | |
cc76b5cc | 717 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 718 | |
cc76b5cc Z |
719 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
720 | for an anonymous function that is lexically scoped inside the | |
721 | currently-compiling function. | |
722 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
723 | to the outer scope is weakened to avoid a reference loop. | |
724 | ||
725 | I<optype> should be an opcode indicating the type of operation that the | |
726 | pad entry is to support. This doesn't affect operational semantics, | |
727 | but is used for debugging. | |
dd2155a4 DM |
728 | |
729 | =cut | |
730 | */ | |
731 | ||
732 | PADOFFSET | |
cc76b5cc | 733 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 | 734 | { |
97aff369 | 735 | dVAR; |
dd2155a4 | 736 | PADOFFSET ix; |
b9f83d2f | 737 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
738 | |
739 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
740 | ||
1dba731d | 741 | pad_peg("add_anon"); |
76f68e9b | 742 | sv_setpvs(name, "&"); |
0d311cdb DM |
743 | /* These two aren't used; just make sure they're not equal to |
744 | * PERL_PADSEQ_INTRO */ | |
745 | COP_SEQ_RANGE_LOW_set(name, 0); | |
746 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 747 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 748 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 749 | /* XXX DAPM use PL_curpad[] ? */ |
cc76b5cc Z |
750 | av_store(PL_comppad, ix, (SV*)func); |
751 | SvPADMY_on((SV*)func); | |
7dafbf52 DM |
752 | |
753 | /* to avoid ref loops, we never have parent + child referencing each | |
754 | * other simultaneously */ | |
cc76b5cc Z |
755 | if (CvOUTSIDE(func)) { |
756 | assert(!CvWEAKOUTSIDE(func)); | |
757 | CvWEAKOUTSIDE_on(func); | |
758 | SvREFCNT_dec(CvOUTSIDE(func)); | |
7dafbf52 | 759 | } |
dd2155a4 DM |
760 | return ix; |
761 | } | |
762 | ||
dd2155a4 | 763 | /* |
cc76b5cc | 764 | =for apidoc m|pad_check_dup|SV *name|U32 flags|const HV *ourstash |
dd2155a4 DM |
765 | |
766 | Check for duplicate declarations: report any of: | |
767 | * a my in the current scope with the same name; | |
768 | * an our (anywhere in the pad) with the same name and the same stash | |
769 | as C<ourstash> | |
770 | C<is_our> indicates that the name to check is an 'our' declaration | |
771 | ||
772 | =cut | |
773 | */ | |
774 | ||
20381b50 | 775 | STATIC void |
cc76b5cc | 776 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 777 | { |
97aff369 | 778 | dVAR; |
53c1dcc0 | 779 | SV **svp; |
dd2155a4 | 780 | PADOFFSET top, off; |
59cfed7d | 781 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 782 | |
7918f24d NC |
783 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
784 | ||
f3548bdc | 785 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 786 | |
59cfed7d | 787 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 788 | |
041457d9 | 789 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
790 | return; /* nothing to check */ |
791 | ||
792 | svp = AvARRAY(PL_comppad_name); | |
793 | top = AvFILLp(PL_comppad_name); | |
794 | /* check the current scope */ | |
795 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
796 | * type ? */ | |
797 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
798 | SV * const sv = svp[off]; |
799 | if (sv | |
dd2155a4 | 800 | && sv != &PL_sv_undef |
ee6cee0c | 801 | && !SvFAKE(sv) |
0d311cdb DM |
802 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
803 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 804 | && sv_eq(name, sv)) |
dd2155a4 | 805 | { |
00b1698f | 806 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 807 | break; /* "our" masking "our" */ |
dd2155a4 | 808 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 | 809 | "\"%s\" variable %"SVf" masks earlier declaration in same %s", |
12bd6ede | 810 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
c541b9b4 | 811 | sv, |
2df5bdd7 DM |
812 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
813 | ? "scope" : "statement")); | |
dd2155a4 DM |
814 | --off; |
815 | break; | |
816 | } | |
817 | } | |
818 | /* check the rest of the pad */ | |
819 | if (is_our) { | |
61c5492a | 820 | while (off > 0) { |
53c1dcc0 AL |
821 | SV * const sv = svp[off]; |
822 | if (sv | |
dd2155a4 | 823 | && sv != &PL_sv_undef |
ee6cee0c | 824 | && !SvFAKE(sv) |
0d311cdb DM |
825 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
826 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 827 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 828 | && sv_eq(name, sv)) |
dd2155a4 DM |
829 | { |
830 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c541b9b4 | 831 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 | 832 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
833 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
834 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
835 | break; |
836 | } | |
61c5492a NC |
837 | --off; |
838 | } | |
dd2155a4 DM |
839 | } |
840 | } | |
841 | ||
842 | ||
dd2155a4 | 843 | /* |
cc76b5cc | 844 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 845 | |
cc76b5cc Z |
846 | Given the name of a lexical variable, find its position in the |
847 | currently-compiling pad. | |
848 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
849 | I<flags> is reserved and must be zero. | |
850 | If it is not in the current pad but appears in the pad of any lexically | |
851 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
852 | Returns the offset in the current pad, | |
853 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
854 | |
855 | =cut | |
856 | */ | |
857 | ||
858 | PADOFFSET | |
cc76b5cc | 859 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 860 | { |
97aff369 | 861 | dVAR; |
b5c19bd7 DM |
862 | SV *out_sv; |
863 | int out_flags; | |
929a0744 | 864 | I32 offset; |
e1ec3a88 | 865 | const AV *nameav; |
929a0744 | 866 | SV **name_svp; |
dd2155a4 | 867 | |
cc76b5cc | 868 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 869 | |
cc76b5cc | 870 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 871 | |
2435e5d3 | 872 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 873 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
874 | (UV)flags); |
875 | ||
e8b34487 BF |
876 | if (flags & padadd_UTF8_NAME) { |
877 | bool is_utf8 = TRUE; | |
878 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
879 | ||
880 | if (is_utf8) | |
881 | flags |= padadd_UTF8_NAME; | |
882 | else | |
883 | flags &= ~padadd_UTF8_NAME; | |
884 | } | |
885 | ||
fbb889c8 BF |
886 | offset = pad_findlex(namepv, namelen, flags, |
887 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 888 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
889 | return offset; |
890 | ||
891 | /* look for an our that's being introduced; this allows | |
892 | * our $foo = 0 unless defined $foo; | |
893 | * to not give a warning. (Yes, this is a hack) */ | |
894 | ||
502c6561 | 895 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 DM |
896 | name_svp = AvARRAY(nameav); |
897 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 898 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
899 | if (namesv && namesv != &PL_sv_undef |
900 | && !SvFAKE(namesv) | |
00b1698f | 901 | && (SvPAD_OUR(namesv)) |
cc76b5cc | 902 | && SvCUR(namesv) == namelen |
e8b34487 BF |
903 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
904 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 905 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
906 | ) |
907 | return offset; | |
908 | } | |
909 | return NOT_IN_PAD; | |
dd2155a4 DM |
910 | } |
911 | ||
e1f795dc | 912 | /* |
cc76b5cc Z |
913 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
914 | ||
915 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
916 | instead of a string/length pair. | |
917 | ||
918 | =cut | |
919 | */ | |
920 | ||
921 | PADOFFSET | |
922 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
923 | { | |
924 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
925 | return pad_findmy_pvn(name, strlen(name), flags); | |
926 | } | |
927 | ||
928 | /* | |
929 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
930 | ||
931 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
932 | of an SV instead of a string/length pair. | |
933 | ||
934 | =cut | |
935 | */ | |
936 | ||
937 | PADOFFSET | |
938 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
939 | { | |
940 | char *namepv; | |
941 | STRLEN namelen; | |
942 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
943 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
944 | if (SvUTF8(name)) |
945 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
946 | return pad_findmy_pvn(namepv, namelen, flags); |
947 | } | |
948 | ||
949 | /* | |
950 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
951 | ||
952 | Find the position of the lexical C<$_> in the pad of the | |
953 | currently-executing function. Returns the offset in the current pad, | |
954 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
955 | the global one should be used instead). | |
956 | L</find_rundefsv> is likely to be more convenient. | |
957 | ||
958 | =cut | |
959 | */ | |
e1f795dc RGS |
960 | |
961 | PADOFFSET | |
29289021 | 962 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 963 | { |
97aff369 | 964 | dVAR; |
e1f795dc RGS |
965 | SV *out_sv; |
966 | int out_flags; | |
fbb889c8 | 967 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 968 | NULL, &out_sv, &out_flags); |
e1f795dc | 969 | } |
dd2155a4 | 970 | |
dd2155a4 | 971 | /* |
cc76b5cc Z |
972 | =for apidoc Am|SV *|find_rundefsv |
973 | ||
974 | Find and return the variable that is named C<$_> in the lexical scope | |
975 | of the currently-executing function. This may be a lexical C<$_>, | |
976 | or will otherwise be the global one. | |
977 | ||
978 | =cut | |
979 | */ | |
789bd863 VP |
980 | |
981 | SV * | |
982 | Perl_find_rundefsv(pTHX) | |
983 | { | |
984 | SV *namesv; | |
985 | int flags; | |
986 | PADOFFSET po; | |
987 | ||
fbb889c8 | 988 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
989 | NULL, &namesv, &flags); |
990 | ||
1979170b | 991 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
992 | return DEFSV; |
993 | ||
994 | return PAD_SVl(po); | |
995 | } | |
996 | ||
c086f97a FC |
997 | SV * |
998 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
999 | { | |
1000 | SV *namesv; | |
1001 | int flags; | |
1002 | PADOFFSET po; | |
1003 | ||
1004 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1005 | ||
1006 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1007 | NULL, &namesv, &flags); | |
1008 | ||
1009 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1010 | return DEFSV; | |
1011 | ||
1012 | return AvARRAY((PAD*) (AvARRAY(CvPADLIST(cv))[CvDEPTH(cv)]))[po]; | |
1013 | } | |
1014 | ||
789bd863 | 1015 | /* |
fbb889c8 | 1016 | =for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|SV** out_name_sv|int *out_flags |
dd2155a4 DM |
1017 | |
1018 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
1019 | in the inner pads if it's found in an outer one. |
1020 | ||
1021 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1022 | cv is the CV in which to start the search, and seq is the current cop_seq | |
1023 | to match against. If warn is true, print appropriate warnings. The out_* | |
1024 | vars return values, and so are pointers to where the returned values | |
1025 | should be stored. out_capture, if non-null, requests that the innermost | |
1026 | instance of the lexical is captured; out_name_sv is set to the innermost | |
1027 | matched namesv or fake namesv; out_flags returns the flags normally | |
1028 | associated with the IVX field of a fake namesv. | |
1029 | ||
1030 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
1031 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 1032 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1033 | the parent pad. |
dd2155a4 DM |
1034 | |
1035 | =cut | |
1036 | */ | |
1037 | ||
b5c19bd7 DM |
1038 | /* the CV has finished being compiled. This is not a sufficient test for |
1039 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1040 | #define CvCOMPILED(cv) CvROOT(cv) | |
1041 | ||
71f882da DM |
1042 | /* the CV does late binding of its lexicals */ |
1043 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
1044 | ||
b5c19bd7 | 1045 | |
dd2155a4 | 1046 | STATIC PADOFFSET |
fbb889c8 | 1047 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1048 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1049 | { |
97aff369 | 1050 | dVAR; |
b5c19bd7 DM |
1051 | I32 offset, new_offset; |
1052 | SV *new_capture; | |
1053 | SV **new_capturep; | |
b64e5050 | 1054 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 1055 | |
7918f24d NC |
1056 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1057 | ||
2435e5d3 BF |
1058 | if (flags & ~padadd_UTF8_NAME) |
1059 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, | |
1060 | (UV)flags); | |
1061 | ||
b5c19bd7 | 1062 | *out_flags = 0; |
a3985cdc | 1063 | |
b5c19bd7 | 1064 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1065 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1066 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1067 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1068 | |
b5c19bd7 | 1069 | /* first, search this pad */ |
dd2155a4 | 1070 | |
b5c19bd7 DM |
1071 | if (padlist) { /* not an undef CV */ |
1072 | I32 fake_offset = 0; | |
502c6561 | 1073 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 1074 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1075 | |
b5c19bd7 | 1076 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 1077 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 1078 | if (namesv && namesv != &PL_sv_undef |
cc76b5cc | 1079 | && SvCUR(namesv) == namelen |
e8b34487 BF |
1080 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1081 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1082 | { |
6012dc80 | 1083 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1084 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1085 | continue; |
1086 | } | |
1087 | /* is seq within the range _LOW to _HIGH ? | |
1088 | * This is complicated by the fact that PL_cop_seqmax | |
1089 | * may have wrapped around at some point */ | |
1090 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1091 | continue; /* not yet introduced */ | |
1092 | ||
1093 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1094 | /* in compiling scope */ | |
1095 | if ( | |
1096 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1097 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1098 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1099 | ) | |
1100 | break; | |
1101 | } | |
1102 | else if ( | |
1103 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1104 | ? | |
1105 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1106 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1107 | ||
1108 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1109 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1110 | ) | |
1111 | break; | |
ee6cee0c DM |
1112 | } |
1113 | } | |
1114 | ||
b5c19bd7 DM |
1115 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1116 | if (offset > 0) { /* not fake */ | |
1117 | fake_offset = 0; | |
1118 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1119 | ||
1120 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1121 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1122 | * ideally, we should detect my's declared within loops | |
1123 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1124 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1125 | * lexes as not multi as viewed from evals. */ |
1126 | ||
1127 | *out_flags = CvANON(cv) ? | |
1128 | PAD_FAKELEX_ANON : | |
1129 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1130 | ? PAD_FAKELEX_MULTI : 0; | |
1131 | ||
1132 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1133 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1134 | PTR2UV(cv), (long)offset, | |
1135 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1136 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1137 | } |
1138 | else { /* fake match */ | |
1139 | offset = fake_offset; | |
1140 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1141 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1142 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1143 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1144 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1145 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1146 | )); |
1147 | } | |
dd2155a4 | 1148 | |
b5c19bd7 | 1149 | /* return the lex? */ |
dd2155a4 | 1150 | |
b5c19bd7 | 1151 | if (out_capture) { |
dd2155a4 | 1152 | |
b5c19bd7 | 1153 | /* our ? */ |
00b1698f | 1154 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1155 | *out_capture = NULL; |
b5c19bd7 DM |
1156 | return offset; |
1157 | } | |
ee6cee0c | 1158 | |
b5c19bd7 DM |
1159 | /* trying to capture from an anon prototype? */ |
1160 | if (CvCOMPILED(cv) | |
1161 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1162 | : *out_flags & PAD_FAKELEX_ANON) | |
1163 | { | |
a2a5de95 NC |
1164 | if (warn) |
1165 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1166 | "Variable \"%"SVf"\" is not available", |
1167 | newSVpvn_flags(namepv, namelen, | |
1168 | SVs_TEMP | | |
1169 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1170 | ||
a0714e2c | 1171 | *out_capture = NULL; |
b5c19bd7 | 1172 | } |
ee6cee0c | 1173 | |
b5c19bd7 DM |
1174 | /* real value */ |
1175 | else { | |
1176 | int newwarn = warn; | |
1177 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1178 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1179 | && warn && ckWARN(WARN_CLOSURE)) { |
1180 | newwarn = 0; | |
1181 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1182 | "Variable \"%"SVf"\" will not stay shared", |
1183 | newSVpvn_flags(namepv, namelen, | |
1184 | SVs_TEMP | | |
1185 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
b5c19bd7 | 1186 | } |
dd2155a4 | 1187 | |
b5c19bd7 DM |
1188 | if (fake_offset && CvANON(cv) |
1189 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1190 | { | |
1191 | SV *n; | |
1192 | /* not yet caught - look further up */ | |
1193 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1194 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1195 | PTR2UV(cv))); | |
1196 | n = *out_name_sv; | |
fbb889c8 | 1197 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1198 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1199 | newwarn, out_capture, out_name_sv, out_flags); |
1200 | *out_name_sv = n; | |
1201 | return offset; | |
dd2155a4 | 1202 | } |
b5c19bd7 | 1203 | |
502c6561 NC |
1204 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
1205 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
1206 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1207 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1208 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1209 | |
d1186544 DM |
1210 | if (SvPADSTALE(*out_capture) |
1211 | && !SvPAD_STATE(name_svp[offset])) | |
1212 | { | |
a2a5de95 | 1213 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e BF |
1214 | "Variable \"%"SVf"\" is not available", |
1215 | newSVpvn_flags(namepv, namelen, | |
1216 | SVs_TEMP | | |
1217 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1218 | *out_capture = NULL; |
dd2155a4 DM |
1219 | } |
1220 | } | |
b5c19bd7 | 1221 | if (!*out_capture) { |
cc76b5cc | 1222 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1223 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1224 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1225 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
1226 | else |
1227 | *out_capture = sv_newmortal(); | |
1228 | } | |
dd2155a4 | 1229 | } |
b5c19bd7 DM |
1230 | |
1231 | return offset; | |
ee6cee0c | 1232 | } |
b5c19bd7 DM |
1233 | } |
1234 | ||
1235 | /* it's not in this pad - try above */ | |
1236 | ||
1237 | if (!CvOUTSIDE(cv)) | |
1238 | return NOT_IN_PAD; | |
9f7d9405 | 1239 | |
b5c19bd7 | 1240 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1241 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1242 | new_capturep = out_capture ? out_capture : |
4608196e | 1243 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1244 | |
fbb889c8 | 1245 | offset = pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, |
b5c19bd7 | 1246 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1247 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1248 | return NOT_IN_PAD; |
9f7d9405 | 1249 | |
b5c19bd7 DM |
1250 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1251 | ||
1252 | /* don't add new fake entries (via eval) to CVs that we have already | |
1253 | * finished compiling, or to undef CVs */ | |
1254 | if (CvCOMPILED(cv) || !padlist) | |
1255 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1256 | ||
1257 | { | |
3291825f | 1258 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1259 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1260 | "good" and only copying flag bits and pointers that it understands. |
1261 | */ | |
1262 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1263 | AV * const ocomppad_name = PL_comppad_name; |
1264 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
1265 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1266 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
1267 | PL_curpad = AvARRAY(PL_comppad); |
1268 | ||
3291825f | 1269 | new_offset |
cc76b5cc | 1270 | = pad_alloc_name(new_namesv, |
59cfed7d | 1271 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1272 | SvPAD_TYPED(*out_name_sv) |
1273 | ? SvSTASH(*out_name_sv) : NULL, | |
1274 | SvOURSTASH(*out_name_sv) | |
1275 | ); | |
1276 | ||
1277 | SvFAKE_on(new_namesv); | |
1278 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1279 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1280 | (long)new_offset, | |
1281 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1282 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1283 | |
809abb02 | 1284 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1285 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1286 | NOOP; /* do nothing */ |
b5c19bd7 | 1287 | } |
71f882da | 1288 | else if (CvLATE(cv)) { |
b5c19bd7 | 1289 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1290 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1291 | CvCLONE_on(cv); |
1292 | } | |
1293 | else { | |
1294 | /* immediate creation - capture outer value right now */ | |
1295 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
1296 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1297 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1298 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1299 | } |
b5c19bd7 | 1300 | *out_name_sv = new_namesv; |
809abb02 | 1301 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1302 | |
1303 | PL_comppad_name = ocomppad_name; | |
1304 | PL_comppad = ocomppad; | |
4608196e | 1305 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1306 | } |
b5c19bd7 | 1307 | return new_offset; |
dd2155a4 DM |
1308 | } |
1309 | ||
fb8a9836 | 1310 | #ifdef DEBUGGING |
cc76b5cc | 1311 | |
dd2155a4 | 1312 | /* |
cc76b5cc | 1313 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1314 | |
cc76b5cc | 1315 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1316 | Use macro PAD_SV instead of calling this function directly. |
1317 | ||
1318 | =cut | |
1319 | */ | |
1320 | ||
dd2155a4 DM |
1321 | SV * |
1322 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1323 | { | |
97aff369 | 1324 | dVAR; |
f3548bdc | 1325 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1326 | |
dd2155a4 DM |
1327 | if (!po) |
1328 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1329 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1330 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1331 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1332 | ); |
1333 | return PL_curpad[po]; | |
1334 | } | |
1335 | ||
dd2155a4 | 1336 | /* |
cc76b5cc | 1337 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1338 | |
cc76b5cc | 1339 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1340 | Use the macro PAD_SETSV() rather than calling this function directly. |
1341 | ||
1342 | =cut | |
1343 | */ | |
1344 | ||
dd2155a4 DM |
1345 | void |
1346 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1347 | { | |
97aff369 | 1348 | dVAR; |
7918f24d NC |
1349 | |
1350 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1351 | ||
f3548bdc | 1352 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1353 | |
1354 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1355 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1356 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1357 | ); |
1358 | PL_curpad[po] = sv; | |
1359 | } | |
dd2155a4 | 1360 | |
cc76b5cc | 1361 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1362 | |
1363 | /* | |
cc76b5cc | 1364 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 DM |
1365 | |
1366 | Update the pad compilation state variables on entry to a new block | |
1367 | ||
1368 | =cut | |
1369 | */ | |
1370 | ||
1371 | /* XXX DAPM perhaps: | |
1372 | * - integrate this in general state-saving routine ??? | |
1373 | * - combine with the state-saving going on in pad_new ??? | |
1374 | * - introduce a new SAVE type that does all this in one go ? | |
1375 | */ | |
1376 | ||
1377 | void | |
1378 | Perl_pad_block_start(pTHX_ int full) | |
1379 | { | |
97aff369 | 1380 | dVAR; |
f3548bdc | 1381 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1382 | SAVEI32(PL_comppad_name_floor); |
1383 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1384 | if (full) | |
1385 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1386 | if (PL_comppad_name_floor < 0) | |
1387 | PL_comppad_name_floor = 0; | |
1388 | SAVEI32(PL_min_intro_pending); | |
1389 | SAVEI32(PL_max_intro_pending); | |
1390 | PL_min_intro_pending = 0; | |
1391 | SAVEI32(PL_comppad_name_fill); | |
1392 | SAVEI32(PL_padix_floor); | |
1393 | PL_padix_floor = PL_padix; | |
1394 | PL_pad_reset_pending = FALSE; | |
1395 | } | |
1396 | ||
dd2155a4 | 1397 | /* |
cc76b5cc | 1398 | =for apidoc m|U32|intro_my |
dd2155a4 DM |
1399 | |
1400 | "Introduce" my variables to visible status. | |
1401 | ||
1402 | =cut | |
1403 | */ | |
1404 | ||
1405 | U32 | |
1406 | Perl_intro_my(pTHX) | |
1407 | { | |
97aff369 | 1408 | dVAR; |
dd2155a4 | 1409 | SV **svp; |
dd2155a4 | 1410 | I32 i; |
6012dc80 | 1411 | U32 seq; |
dd2155a4 | 1412 | |
f3548bdc | 1413 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1414 | if (! PL_min_intro_pending) |
1415 | return PL_cop_seqmax; | |
1416 | ||
1417 | svp = AvARRAY(PL_comppad_name); | |
1418 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1419 | SV * const sv = svp[i]; |
1420 | ||
0d311cdb DM |
1421 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1422 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1423 | { | |
2df5bdd7 | 1424 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1425 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1426 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1427 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1428 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1429 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1430 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1431 | ); |
1432 | } | |
1433 | } | |
6012dc80 DM |
1434 | seq = PL_cop_seqmax; |
1435 | PL_cop_seqmax++; | |
1436 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1437 | PL_cop_seqmax++; | |
dd2155a4 DM |
1438 | PL_min_intro_pending = 0; |
1439 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1440 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1441 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1442 | |
6012dc80 | 1443 | return seq; |
dd2155a4 DM |
1444 | } |
1445 | ||
1446 | /* | |
cc76b5cc | 1447 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1448 | |
1449 | Cleanup at end of scope during compilation: set the max seq number for | |
1450 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1451 | ||
1452 | =cut | |
1453 | */ | |
1454 | ||
1455 | void | |
1456 | Perl_pad_leavemy(pTHX) | |
1457 | { | |
97aff369 | 1458 | dVAR; |
dd2155a4 | 1459 | I32 off; |
551405c4 | 1460 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1461 | |
1462 | PL_pad_reset_pending = FALSE; | |
1463 | ||
f3548bdc | 1464 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1465 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1466 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1467 | const SV * const sv = svp[off]; |
9b387841 NC |
1468 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1469 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1470 | "%"SVf" never introduced", | |
1471 | SVfARG(sv)); | |
dd2155a4 DM |
1472 | } |
1473 | } | |
1474 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1475 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1476 | const SV * const sv = svp[off]; |
2df5bdd7 DM |
1477 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1478 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1479 | { | |
809abb02 | 1480 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1481 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1482 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1483 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1484 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1485 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1486 | ); |
1487 | } | |
1488 | } | |
1489 | PL_cop_seqmax++; | |
6012dc80 DM |
1490 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1491 | PL_cop_seqmax++; | |
dd2155a4 DM |
1492 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1493 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1494 | } | |
1495 | ||
dd2155a4 | 1496 | /* |
cc76b5cc | 1497 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1498 | |
1499 | Abandon the tmp in the current pad at offset po and replace with a | |
1500 | new one. | |
1501 | ||
1502 | =cut | |
1503 | */ | |
1504 | ||
1505 | void | |
1506 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1507 | { | |
97aff369 | 1508 | dVAR; |
f3548bdc | 1509 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1510 | if (!PL_curpad) |
1511 | return; | |
1512 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1513 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1514 | if (!po) | |
1515 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1516 | ||
1517 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1518 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1519 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1520 | ||
1521 | if (PL_curpad[po]) | |
1522 | SvPADTMP_off(PL_curpad[po]); | |
1523 | if (refadjust) | |
1524 | SvREFCNT_dec(PL_curpad[po]); | |
1525 | ||
9ad9869c DM |
1526 | |
1527 | /* if pad tmps aren't shared between ops, then there's no need to | |
1528 | * create a new tmp when an existing op is freed */ | |
1529 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1530 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1531 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1532 | #else |
1533 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1534 | #endif |
dd2155a4 DM |
1535 | if ((I32)po < PL_padix) |
1536 | PL_padix = po - 1; | |
1537 | } | |
1538 | ||
dd2155a4 | 1539 | /* |
cc76b5cc | 1540 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1541 | |
1542 | Mark all the current temporaries for reuse | |
1543 | ||
1544 | =cut | |
1545 | */ | |
1546 | ||
1547 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1548 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1549 | * on the stack by OPs that use them, there are several ways to get an alias | |
1550 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1551 | * We avoid doing this until we can think of a Better Way. | |
1552 | * GSAR 97-10-29 */ | |
1f676739 | 1553 | static void |
82af08ae | 1554 | S_pad_reset(pTHX) |
dd2155a4 | 1555 | { |
97aff369 | 1556 | dVAR; |
dd2155a4 | 1557 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 DM |
1558 | if (AvARRAY(PL_comppad) != PL_curpad) |
1559 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1560 | ||
1561 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1562 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1563 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1564 | (long)PL_padix, (long)PL_padix_floor | |
1565 | ) | |
1566 | ); | |
1567 | ||
1568 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1569 | register I32 po; |
dd2155a4 DM |
1570 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1571 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1572 | SvPADTMP_off(PL_curpad[po]); | |
1573 | } | |
1574 | PL_padix = PL_padix_floor; | |
1575 | } | |
1576 | #endif | |
1577 | PL_pad_reset_pending = FALSE; | |
1578 | } | |
1579 | ||
dd2155a4 | 1580 | /* |
cc76b5cc Z |
1581 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1582 | ||
1583 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1584 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1585 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1586 | the kind of subroutine: | |
dd2155a4 | 1587 | |
cc76b5cc Z |
1588 | padtidy_SUB ordinary subroutine |
1589 | padtidy_SUBCLONE prototype for lexical closure | |
1590 | padtidy_FORMAT format | |
dd2155a4 DM |
1591 | |
1592 | =cut | |
1593 | */ | |
1594 | ||
1595 | /* XXX DAPM surely most of this stuff should be done properly | |
1596 | * at the right time beforehand, rather than going around afterwards | |
1597 | * cleaning up our mistakes ??? | |
1598 | */ | |
1599 | ||
1600 | void | |
1601 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1602 | { | |
27da23d5 | 1603 | dVAR; |
dd2155a4 | 1604 | |
f3548bdc | 1605 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1606 | |
1607 | /* If this CV has had any 'eval-capable' ops planted in it | |
1608 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1609 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1610 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1611 | * the right CvOUTSIDE. | |
1612 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1613 | * executed within it. |
b5c19bd7 DM |
1614 | */ |
1615 | ||
1616 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1617 | const CV *cv; |
b5c19bd7 DM |
1618 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1619 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1620 | break; /* no need to mark already-compiled code */ | |
1621 | if (CvANON(cv)) { | |
1622 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1623 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1624 | CvCLONE_on(cv); | |
1625 | } | |
1626 | } | |
1627 | } | |
1628 | ||
dd2155a4 DM |
1629 | /* extend curpad to match namepad */ |
1630 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1631 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1632 | |
1633 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1634 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1635 | PADOFFSET ix; |
b5c19bd7 | 1636 | |
dd2155a4 DM |
1637 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1638 | SV *namesv; | |
1639 | ||
1640 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1641 | continue; | |
1642 | /* | |
1643 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1644 | * pad are anonymous subs. |
dd2155a4 DM |
1645 | * The rest are created anew during cloning. |
1646 | */ | |
a0714e2c | 1647 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1648 | namesv != &PL_sv_undef && |
b15aece3 | 1649 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1650 | { |
1651 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1652 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1653 | } |
1654 | } | |
1655 | } | |
1656 | else if (type == padtidy_SUB) { | |
1657 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1658 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1659 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1660 | AvREIFY_only(av); |
dd2155a4 DM |
1661 | } |
1662 | ||
4cee4ca8 | 1663 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1664 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1665 | PADOFFSET ix; |
dd2155a4 DM |
1666 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1667 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1668 | continue; | |
adf8f095 | 1669 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1670 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1671 | } else if (!SvFAKE(namep[ix])) { |
1672 | /* This is a work around for how the current implementation of | |
1673 | ?{ } blocks in regexps interacts with lexicals. | |
1674 | ||
1675 | One of our lexicals. | |
1676 | Can't do this on all lexicals, otherwise sub baz() won't | |
1677 | compile in | |
1678 | ||
1679 | my $foo; | |
1680 | ||
1681 | sub bar { ++$foo; } | |
1682 | ||
1683 | sub baz { ++$foo; } | |
1684 | ||
1685 | because completion of compiling &bar calling pad_tidy() | |
1686 | would cause (top level) $foo to be marked as stale, and | |
1687 | "no longer available". */ | |
1688 | SvPADSTALE_on(PL_curpad[ix]); | |
1689 | } | |
dd2155a4 DM |
1690 | } |
1691 | } | |
f3548bdc | 1692 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1693 | } |
1694 | ||
dd2155a4 | 1695 | /* |
cc76b5cc | 1696 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1697 | |
8627550a | 1698 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1699 | |
1700 | =cut | |
1701 | */ | |
1702 | ||
1703 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1704 | void | |
1705 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1706 | { | |
97aff369 | 1707 | dVAR; |
f3548bdc | 1708 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1709 | if (!PL_curpad) |
1710 | return; | |
1711 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1712 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1713 | if (!po) | |
1714 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1715 | ||
1716 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1717 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1718 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1719 | ); | |
1720 | ||
1721 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1722 | SvPADTMP_off(PL_curpad[po]); | |
dd2155a4 DM |
1723 | } |
1724 | if ((I32)po < PL_padix) | |
1725 | PL_padix = po - 1; | |
1726 | } | |
1727 | ||
dd2155a4 | 1728 | /* |
cc76b5cc | 1729 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1730 | |
1731 | Dump the contents of a padlist | |
1732 | ||
1733 | =cut | |
1734 | */ | |
1735 | ||
1736 | void | |
1737 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1738 | { | |
97aff369 | 1739 | dVAR; |
e1ec3a88 AL |
1740 | const AV *pad_name; |
1741 | const AV *pad; | |
dd2155a4 DM |
1742 | SV **pname; |
1743 | SV **ppad; | |
dd2155a4 DM |
1744 | I32 ix; |
1745 | ||
7918f24d NC |
1746 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1747 | ||
dd2155a4 DM |
1748 | if (!padlist) { |
1749 | return; | |
1750 | } | |
502c6561 NC |
1751 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1752 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1753 | pname = AvARRAY(pad_name); |
1754 | ppad = AvARRAY(pad); | |
1755 | Perl_dump_indent(aTHX_ level, file, | |
1756 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1757 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1758 | ); | |
1759 | ||
1760 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1761 | const SV *namesv = pname[ix]; |
dd2155a4 | 1762 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1763 | namesv = NULL; |
dd2155a4 DM |
1764 | } |
1765 | if (namesv) { | |
ee6cee0c DM |
1766 | if (SvFAKE(namesv)) |
1767 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1768 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1769 | (int) ix, |
1770 | PTR2UV(ppad[ix]), | |
1771 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1772 | SvPVX_const(namesv), |
809abb02 NC |
1773 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1774 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1775 | |
ee6cee0c DM |
1776 | ); |
1777 | else | |
1778 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1779 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1780 | (int) ix, |
1781 | PTR2UV(ppad[ix]), | |
1782 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1783 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1784 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1785 | SvPVX_const(namesv) |
ee6cee0c | 1786 | ); |
dd2155a4 DM |
1787 | } |
1788 | else if (full) { | |
1789 | Perl_dump_indent(aTHX_ level+1, file, | |
1790 | "%2d. 0x%"UVxf"<%lu>\n", | |
1791 | (int) ix, | |
1792 | PTR2UV(ppad[ix]), | |
1793 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1794 | ); | |
1795 | } | |
1796 | } | |
1797 | } | |
1798 | ||
cc76b5cc | 1799 | #ifdef DEBUGGING |
dd2155a4 DM |
1800 | |
1801 | /* | |
cc76b5cc | 1802 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1803 | |
1804 | dump the contents of a CV | |
1805 | ||
1806 | =cut | |
1807 | */ | |
1808 | ||
dd2155a4 | 1809 | STATIC void |
e1ec3a88 | 1810 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1811 | { |
97aff369 | 1812 | dVAR; |
53c1dcc0 AL |
1813 | const CV * const outside = CvOUTSIDE(cv); |
1814 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1815 | |
7918f24d NC |
1816 | PERL_ARGS_ASSERT_CV_DUMP; |
1817 | ||
dd2155a4 DM |
1818 | PerlIO_printf(Perl_debug_log, |
1819 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1820 | title, | |
1821 | PTR2UV(cv), | |
1822 | (CvANON(cv) ? "ANON" | |
71f882da | 1823 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1824 | : (cv == PL_main_cv) ? "MAIN" |
1825 | : CvUNIQUE(cv) ? "UNIQUE" | |
1826 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1827 | PTR2UV(outside), | |
1828 | (!outside ? "null" | |
1829 | : CvANON(outside) ? "ANON" | |
1830 | : (outside == PL_main_cv) ? "MAIN" | |
1831 | : CvUNIQUE(outside) ? "UNIQUE" | |
1832 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1833 | ||
1834 | PerlIO_printf(Perl_debug_log, | |
1835 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1836 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1837 | } | |
dd2155a4 | 1838 | |
cc76b5cc | 1839 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1840 | |
1841 | /* | |
cc76b5cc | 1842 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1843 | |
cc76b5cc Z |
1844 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1845 | of the function: its code, pad structure, and other attributes. | |
1846 | The prototype is combined with a capture of outer lexicals to which the | |
1847 | code refers, which are taken from the currently-executing instance of | |
1848 | the immediately surrounding code. | |
dd2155a4 DM |
1849 | |
1850 | =cut | |
1851 | */ | |
1852 | ||
1853 | CV * | |
1854 | Perl_cv_clone(pTHX_ CV *proto) | |
1855 | { | |
27da23d5 | 1856 | dVAR; |
dd2155a4 | 1857 | I32 ix; |
53c1dcc0 | 1858 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1859 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1860 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1861 | SV** const pname = AvARRAY(protopad_name); |
1862 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1863 | const I32 fname = AvFILLp(protopad_name); |
1864 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1865 | CV* cv; |
b5c19bd7 DM |
1866 | SV** outpad; |
1867 | CV* outside; | |
71f882da | 1868 | long depth; |
dd2155a4 | 1869 | |
7918f24d NC |
1870 | PERL_ARGS_ASSERT_CV_CLONE; |
1871 | ||
dd2155a4 DM |
1872 | assert(!CvUNIQUE(proto)); |
1873 | ||
71f882da DM |
1874 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1875 | * to a prototype; we instead want the cloned parent who called us. | |
1876 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1877 | ||
1878 | outside = CvOUTSIDE(proto); | |
1879 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1880 | outside = find_runcv(NULL); | |
1881 | depth = CvDEPTH(outside); | |
1882 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1883 | if (!depth) | |
1884 | depth = 1; | |
b5c19bd7 DM |
1885 | assert(CvPADLIST(outside)); |
1886 | ||
dd2155a4 DM |
1887 | ENTER; |
1888 | SAVESPTR(PL_compcv); | |
1889 | ||
ea726b52 | 1890 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
c794ca97 | 1891 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC); |
dd2155a4 DM |
1892 | CvCLONED_on(cv); |
1893 | ||
bad4ae38 FC |
1894 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) |
1895 | : CvFILE(proto); | |
b3f91e91 | 1896 | CvGV_set(cv,CvGV(proto)); |
c68d9564 | 1897 | CvSTASH_set(cv, CvSTASH(proto)); |
b34c0dd4 | 1898 | OP_REFCNT_LOCK; |
dd2155a4 | 1899 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1900 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1901 | CvSTART(cv) = CvSTART(proto); |
ea726b52 | 1902 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
b5c19bd7 | 1903 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1904 | |
1905 | if (SvPOK(proto)) | |
ad64d0ec | 1906 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 | 1907 | |
b7787f18 | 1908 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1909 | |
b5c19bd7 | 1910 | av_fill(PL_comppad, fpad); |
7aaef02a | 1911 | for (ix = fname; ix > 0; ix--) |
dd2155a4 DM |
1912 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
1913 | ||
dd2155a4 DM |
1914 | PL_curpad = AvARRAY(PL_comppad); |
1915 | ||
71f882da | 1916 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1917 | |
dd2155a4 | 1918 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1919 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1920 | SV *sv = NULL; | |
71f882da | 1921 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1922 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 | 1923 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da | 1924 | assert(sv); |
33894c1a DM |
1925 | /* formats may have an inactive parent, |
1926 | while my $x if $false can leave an active var marked as | |
d1186544 DM |
1927 | stale. And state vars are always available */ |
1928 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { | |
a2a5de95 | 1929 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e | 1930 | "Variable \"%"SVf"\" is not available", namesv); |
a0714e2c | 1931 | sv = NULL; |
71f882da | 1932 | } |
33894c1a | 1933 | else |
f84c484e | 1934 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1935 | } |
71f882da | 1936 | if (!sv) { |
b15aece3 | 1937 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 1938 | if (sigil == '&') |
dd2155a4 | 1939 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 1940 | else if (sigil == '@') |
ad64d0ec | 1941 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 1942 | else if (sigil == '%') |
ad64d0ec | 1943 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1944 | else |
561b68a9 | 1945 | sv = newSV(0); |
235cc2e3 | 1946 | SvPADMY_on(sv); |
0d3b281c DM |
1947 | /* reset the 'assign only once' flag on each state var */ |
1948 | if (SvPAD_STATE(namesv)) | |
1949 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
1950 | } |
1951 | } | |
1952 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 1953 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
1954 | } |
1955 | else { | |
561b68a9 | 1956 | sv = newSV(0); |
dd2155a4 | 1957 | SvPADTMP_on(sv); |
dd2155a4 | 1958 | } |
71f882da | 1959 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1960 | } |
1961 | ||
dd2155a4 DM |
1962 | DEBUG_Xv( |
1963 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1964 | cv_dump(outside, "Outside"); | |
1965 | cv_dump(proto, "Proto"); | |
1966 | cv_dump(cv, "To"); | |
1967 | ); | |
1968 | ||
1969 | LEAVE; | |
1970 | ||
1971 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1972 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1973 | * The prototype was marked as a candiate for const-ization, | |
1974 | * so try to grab the current const value, and if successful, | |
1975 | * turn into a const sub: | |
1976 | */ | |
551405c4 | 1977 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1978 | if (const_sv) { |
1979 | SvREFCNT_dec(cv); | |
bd61b366 | 1980 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
1981 | } |
1982 | else { | |
1983 | CvCONST_off(cv); | |
1984 | } | |
dd2155a4 DM |
1985 | } |
1986 | ||
1987 | return cv; | |
1988 | } | |
1989 | ||
dd2155a4 | 1990 | /* |
cc76b5cc | 1991 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
1992 | |
1993 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1994 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1995 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1996 | |
1997 | =cut | |
1998 | */ | |
1999 | ||
2000 | void | |
2001 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2002 | { | |
97aff369 | 2003 | dVAR; |
dd2155a4 | 2004 | I32 ix; |
502c6561 NC |
2005 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
2006 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
2007 | SV ** const namepad = AvARRAY(comppad_name); |
2008 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2009 | |
2010 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2011 | PERL_UNUSED_ARG(old_cv); |
2012 | ||
dd2155a4 | 2013 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2014 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 2015 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 2016 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2017 | { |
ea726b52 | 2018 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
2019 | assert(CvWEAKOUTSIDE(innercv)); |
2020 | assert(CvOUTSIDE(innercv) == old_cv); | |
2021 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
2022 | } |
2023 | } | |
2024 | } | |
2025 | ||
2026 | /* | |
cc76b5cc | 2027 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2028 | |
2029 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2030 | this depth, in which case don't bother creating a new one. Then give |
2031 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2032 | |
2033 | =cut | |
2034 | */ | |
2035 | ||
2036 | void | |
26019298 | 2037 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2038 | { |
97aff369 | 2039 | dVAR; |
7918f24d NC |
2040 | |
2041 | PERL_ARGS_ASSERT_PAD_PUSH; | |
2042 | ||
b37c2d43 | 2043 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
2044 | SV** const svp = AvARRAY(padlist); |
2045 | AV* const newpad = newAV(); | |
2046 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2047 | I32 ix = AvFILLp((const AV *)svp[1]); |
2048 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2049 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2050 | AV *av; |
2051 | ||
dd2155a4 DM |
2052 | for ( ;ix > 0; ix--) { |
2053 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 2054 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2055 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2056 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2057 | || sigil == '&') | |
2058 | { | |
dd2155a4 DM |
2059 | /* outer lexical or anon code */ |
2060 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2061 | } | |
2062 | else { /* our own lexical */ | |
26019298 AL |
2063 | SV *sv; |
2064 | if (sigil == '@') | |
ad64d0ec | 2065 | sv = MUTABLE_SV(newAV()); |
26019298 | 2066 | else if (sigil == '%') |
ad64d0ec | 2067 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2068 | else |
561b68a9 | 2069 | sv = newSV(0); |
26019298 | 2070 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2071 | SvPADMY_on(sv); |
2072 | } | |
2073 | } | |
2074 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 2075 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2076 | } |
2077 | else { | |
2078 | /* save temporaries on recursion? */ | |
561b68a9 | 2079 | SV * const sv = newSV(0); |
26019298 | 2080 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2081 | SvPADTMP_on(sv); |
2082 | } | |
2083 | } | |
26019298 | 2084 | av = newAV(); |
ad64d0ec | 2085 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2086 | AvREIFY_only(av); |
26019298 | 2087 | |
ad64d0ec | 2088 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
2089 | AvFILLp(padlist) = depth; |
2090 | } | |
2091 | } | |
b21dc031 | 2092 | |
cc76b5cc Z |
2093 | /* |
2094 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2095 | ||
2096 | Looks up the type of the lexical variable at position I<po> in the | |
2097 | currently-compiling pad. If the variable is typed, the stash of the | |
2098 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2099 | ||
2100 | =cut | |
2101 | */ | |
b21dc031 AL |
2102 | |
2103 | HV * | |
2104 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2105 | { | |
97aff369 | 2106 | dVAR; |
551405c4 | 2107 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 2108 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
2109 | return SvSTASH(*av); |
2110 | } | |
5c284bb0 | 2111 | return NULL; |
b21dc031 | 2112 | } |
66610fdd | 2113 | |
d5b1589c NC |
2114 | #if defined(USE_ITHREADS) |
2115 | ||
2116 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2117 | ||
cc76b5cc Z |
2118 | /* |
2119 | =for apidoc m|AV *|padlist_dup|AV *srcpad|CLONE_PARAMS *param | |
2120 | ||
2121 | Duplicates a pad. | |
2122 | ||
2123 | =cut | |
2124 | */ | |
2125 | ||
d5b1589c | 2126 | AV * |
cc76b5cc | 2127 | Perl_padlist_dup(pTHX_ AV *srcpad, CLONE_PARAMS *param) |
d5b1589c NC |
2128 | { |
2129 | AV *dstpad; | |
2130 | PERL_ARGS_ASSERT_PADLIST_DUP; | |
2131 | ||
2132 | if (!srcpad) | |
2133 | return NULL; | |
2134 | ||
2135 | assert(!AvREAL(srcpad)); | |
6de654a5 NC |
2136 | |
2137 | if (param->flags & CLONEf_COPY_STACKS | |
2138 | || SvREFCNT(AvARRAY(srcpad)[1]) > 1) { | |
2139 | /* XXX padlists are real, but pretend to be not */ | |
2140 | AvREAL_on(srcpad); | |
2141 | dstpad = av_dup_inc(srcpad, param); | |
2142 | AvREAL_off(srcpad); | |
2143 | AvREAL_off(dstpad); | |
2144 | assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1); | |
2145 | } else { | |
2146 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2147 | to build anything other than the first level of pads. */ | |
2148 | ||
2149 | I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]); | |
2150 | AV *pad1; | |
05d04d9c | 2151 | const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0])); |
6de654a5 NC |
2152 | const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1]; |
2153 | SV **oldpad = AvARRAY(srcpad1); | |
2154 | SV **names; | |
2155 | SV **pad1a; | |
2156 | AV *args; | |
2157 | /* look for it in the table first. | |
2158 | I *think* that it shouldn't be possible to find it there. | |
2159 | Well, except for how Perl_sv_compile_2op() "works" :-( */ | |
2160 | dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad); | |
2161 | ||
2162 | if (dstpad) | |
2163 | return dstpad; | |
2164 | ||
2165 | dstpad = newAV(); | |
2166 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
2167 | AvREAL_off(dstpad); | |
2168 | av_extend(dstpad, 1); | |
2169 | AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param)); | |
2170 | names = AvARRAY(AvARRAY(dstpad)[0]); | |
2171 | ||
2172 | pad1 = newAV(); | |
2173 | ||
2174 | av_extend(pad1, ix); | |
2175 | AvARRAY(dstpad)[1] = MUTABLE_SV(pad1); | |
2176 | pad1a = AvARRAY(pad1); | |
2177 | AvFILLp(dstpad) = 1; | |
2178 | ||
2179 | if (ix > -1) { | |
2180 | AvFILLp(pad1) = ix; | |
2181 | ||
2182 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2183 | if (!oldpad[ix]) { |
2184 | pad1a[ix] = NULL; | |
2185 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
2186 | const char sigil = SvPVX_const(names[ix])[0]; | |
2187 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2188 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2189 | || sigil == '&') | |
2190 | { | |
2191 | /* outer lexical or anon code */ | |
2192 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2193 | } | |
2194 | else { /* our own lexical */ | |
adf8f095 NC |
2195 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2196 | /* This is a work around for how the current | |
2197 | implementation of ?{ } blocks in regexps | |
2198 | interacts with lexicals. */ | |
05d04d9c NC |
2199 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2200 | } else { | |
2201 | SV *sv; | |
2202 | ||
2203 | if (sigil == '@') | |
2204 | sv = MUTABLE_SV(newAV()); | |
2205 | else if (sigil == '%') | |
2206 | sv = MUTABLE_SV(newHV()); | |
2207 | else | |
2208 | sv = newSV(0); | |
2209 | pad1a[ix] = sv; | |
2210 | SvPADMY_on(sv); | |
2211 | } | |
2212 | } | |
2213 | } | |
2214 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
2215 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2216 | } | |
2217 | else { | |
2218 | /* save temporaries on recursion? */ | |
2219 | SV * const sv = newSV(0); | |
2220 | pad1a[ix] = sv; | |
2221 | ||
2222 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2223 | FIXTHAT before merging this branch. | |
2224 | (And I know how to) */ | |
2225 | if (SvPADMY(oldpad[ix])) | |
2226 | SvPADMY_on(sv); | |
2227 | else | |
2228 | SvPADTMP_on(sv); | |
2229 | } | |
6de654a5 NC |
2230 | } |
2231 | ||
2232 | if (oldpad[0]) { | |
2233 | args = newAV(); /* Will be @_ */ | |
2234 | AvREIFY_only(args); | |
2235 | pad1a[0] = (SV *)args; | |
2236 | } | |
2237 | } | |
2238 | } | |
d5b1589c NC |
2239 | |
2240 | return dstpad; | |
2241 | } | |
2242 | ||
cc76b5cc | 2243 | #endif /* USE_ITHREADS */ |
d5b1589c | 2244 | |
66610fdd RGS |
2245 | /* |
2246 | * Local variables: | |
2247 | * c-indentation-style: bsd | |
2248 | * c-basic-offset: 4 | |
2249 | * indent-tabs-mode: t | |
2250 | * End: | |
2251 | * | |
37442d52 RGS |
2252 | * ex: set ts=8 sts=4 sw=4 noet: |
2253 | */ |