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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 | ||
61296642 | 30 | This file contains the functions that create and manipulate scratchpads, |
166f8a29 | 31 | which are array-of-array data structures attached to a CV (ie a sub) |
61296642 | 32 | and which store lexical variables and opcode temporary and per-thread |
166f8a29 DM |
33 | values. |
34 | ||
dd2155a4 DM |
35 | =for apidoc m|AV *|CvPADLIST|CV *cv |
36 | CV's can have CvPADLIST(cv) set to point to an AV. | |
37 | ||
38 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
39 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
40 | executing). Require'd files are simply evals without any outer lexical |
41 | scope. | |
dd2155a4 DM |
42 | |
43 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
44 | but that is really the callers pad (a slot of which is allocated by | |
45 | every entersub). | |
46 | ||
47 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
f3548bdc | 48 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 DM |
49 | The items in the AV are not SVs as for a normal AV, but other AVs: |
50 | ||
51 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
52 | the "static type information" for lexicals. | |
53 | ||
54 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
55 | depth of recursion into the CV. | |
56 | The 0'th slot of a frame AV is an AV which is @_. | |
57 | other entries are storage for variables and op targets. | |
58 | ||
59 | During compilation: | |
a6d05634 TM |
60 | C<PL_comppad_name> is set to the names AV. |
61 | C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1. | |
62 | C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)). | |
dd2155a4 | 63 | |
f3548bdc DM |
64 | During execution, C<PL_comppad> and C<PL_curpad> refer to the live |
65 | frame of the currently executing sub. | |
66 | ||
67 | Iterating over the names AV iterates over all possible pad | |
dd2155a4 DM |
68 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
69 | &PL_sv_undef "names" (see pad_alloc()). | |
70 | ||
71 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
72 | The rest are op targets/GVs/constants which are statically allocated | |
73 | or resolved at compile time. These don't have names by which they | |
74 | can be looked up from Perl code at run time through eval"" like | |
75 | my/our variables can be. Since they can't be looked up by "name" | |
76 | but only by their index allocated at compile time (which is usually | |
77 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
78 | ||
79 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 80 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
81 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
82 | _HIGH). During compilation, these fields may hold the special value | |
83 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
84 | |
85 | COP_SEQ_RANGE_LOW _HIGH | |
86 | ----------------- ----- | |
87 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
88 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
89 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
90 | ||
91 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 92 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 93 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 94 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 95 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 96 | |
b5c19bd7 DM |
97 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
98 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
3441fb63 NC |
99 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
100 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 101 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 102 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
103 | within the parent's pad where the lexical's value is stored, to make |
104 | cloning quicker. | |
dd2155a4 | 105 | |
a6d05634 | 106 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
107 | is a CV representing a possible closure. |
108 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
109 | become so if C<my sub foo {}> is implemented.) | |
110 | ||
71f882da DM |
111 | Note that formats are treated as anon subs, and are cloned each time |
112 | write is called (if necessary). | |
113 | ||
ab8e66c1 | 114 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
e6e7068b DM |
115 | and set on scope exit. This allows the 'Variable $x is not available' warning |
116 | to be generated in evals, such as | |
117 | ||
118 | { my $x = 1; sub f { eval '$x'} } f(); | |
119 | ||
ab8e66c1 | 120 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised' |
d1186544 | 121 | |
dd2155a4 DM |
122 | =cut |
123 | */ | |
124 | ||
125 | ||
126 | #include "EXTERN.h" | |
127 | #define PERL_IN_PAD_C | |
128 | #include "perl.h" | |
952306ac | 129 | #include "keywords.h" |
dd2155a4 | 130 | |
3441fb63 NC |
131 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
132 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
133 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
134 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 135 | |
3441fb63 NC |
136 | #define PARENT_PAD_INDEX_set(sv,val) \ |
137 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
138 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
139 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 140 | |
1dba731d NC |
141 | #ifdef PERL_MAD |
142 | void pad_peg(const char* s) { | |
790427a5 DM |
143 | static int pegcnt; /* XXX not threadsafe */ |
144 | PERL_UNUSED_ARG(s); | |
7918f24d NC |
145 | |
146 | PERL_ARGS_ASSERT_PAD_PEG; | |
147 | ||
1dba731d NC |
148 | pegcnt++; |
149 | } | |
150 | #endif | |
dd2155a4 DM |
151 | |
152 | /* | |
153 | =for apidoc pad_new | |
154 | ||
155 | Create a new compiling padlist, saving and updating the various global | |
156 | vars at the same time as creating the pad itself. The following flags | |
157 | can be OR'ed together: | |
158 | ||
159 | padnew_CLONE this pad is for a cloned CV | |
160 | padnew_SAVE save old globals | |
161 | padnew_SAVESUB also save extra stuff for start of sub | |
162 | ||
163 | =cut | |
164 | */ | |
165 | ||
166 | PADLIST * | |
c7c737cb | 167 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 168 | { |
97aff369 | 169 | dVAR; |
e1ec3a88 | 170 | AV *padlist, *padname, *pad; |
7a6072a8 | 171 | SV **ary; |
dd2155a4 | 172 | |
f3548bdc DM |
173 | ASSERT_CURPAD_LEGAL("pad_new"); |
174 | ||
dd2155a4 DM |
175 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
176 | * vars (based on flags) rather than storing vals + addresses for | |
177 | * each individually. Also see pad_block_start. | |
178 | * XXX DAPM Try to see whether all these conditionals are required | |
179 | */ | |
180 | ||
181 | /* save existing state, ... */ | |
182 | ||
183 | if (flags & padnew_SAVE) { | |
3979c56f | 184 | SAVECOMPPAD(); |
dd2155a4 DM |
185 | SAVESPTR(PL_comppad_name); |
186 | if (! (flags & padnew_CLONE)) { | |
187 | SAVEI32(PL_padix); | |
188 | SAVEI32(PL_comppad_name_fill); | |
189 | SAVEI32(PL_min_intro_pending); | |
190 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 191 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 192 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 193 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
194 | } |
195 | } | |
196 | } | |
197 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
198 | * saved - check at some pt that this is okay */ | |
199 | ||
200 | /* ... create new pad ... */ | |
201 | ||
202 | padlist = newAV(); | |
203 | padname = newAV(); | |
204 | pad = newAV(); | |
205 | ||
206 | if (flags & padnew_CLONE) { | |
207 | /* XXX DAPM I dont know why cv_clone needs it | |
208 | * doing differently yet - perhaps this separate branch can be | |
209 | * dispensed with eventually ??? | |
210 | */ | |
211 | ||
e1ec3a88 | 212 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 213 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 214 | AvREIFY_only(a0); |
dd2155a4 DM |
215 | } |
216 | else { | |
a0714e2c | 217 | av_store(pad, 0, NULL); |
dd2155a4 DM |
218 | } |
219 | ||
220 | AvREAL_off(padlist); | |
7a6072a8 NC |
221 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
222 | array - names, and depth=1. The default for av_store() is to allocate | |
223 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
224 | up, so we inline the allocation of the array here. */ | |
225 | Newx(ary, 2, SV*); | |
226 | AvFILLp(padlist) = 1; | |
227 | AvMAX(padlist) = 1; | |
228 | AvALLOC(padlist) = ary; | |
229 | AvARRAY(padlist) = ary; | |
230 | ary[0] = MUTABLE_SV(padname); | |
231 | ary[1] = MUTABLE_SV(pad); | |
dd2155a4 DM |
232 | |
233 | /* ... then update state variables */ | |
234 | ||
403799bf NC |
235 | PL_comppad_name = padname; |
236 | PL_comppad = pad; | |
237 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
238 | |
239 | if (! (flags & padnew_CLONE)) { | |
240 | PL_comppad_name_fill = 0; | |
241 | PL_min_intro_pending = 0; | |
242 | PL_padix = 0; | |
b5c19bd7 | 243 | PL_cv_has_eval = 0; |
dd2155a4 DM |
244 | } |
245 | ||
246 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 247 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 248 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 249 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
250 | PTR2UV(padname), (UV)flags |
251 | ) | |
252 | ); | |
253 | ||
254 | return (PADLIST*)padlist; | |
255 | } | |
256 | ||
dd2155a4 | 257 | |
c4528262 NC |
258 | /* |
259 | =head1 Embedding Functions | |
260 | ||
261 | =for apidoc cv_undef | |
262 | ||
263 | Clear out all the active components of a CV. This can happen either | |
264 | by an explicit C<undef &foo>, or by the reference count going to zero. | |
265 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
266 | children can still follow the full lexical scope chain. | |
267 | ||
268 | =cut | |
269 | */ | |
270 | ||
271 | void | |
272 | Perl_cv_undef(pTHX_ CV *cv) | |
273 | { | |
274 | dVAR; | |
c2736fce | 275 | const PADLIST *padlist = CvPADLIST(cv); |
c4528262 NC |
276 | |
277 | PERL_ARGS_ASSERT_CV_UNDEF; | |
278 | ||
279 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
280 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
281 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
282 | ); | |
283 | ||
284 | #ifdef USE_ITHREADS | |
285 | if (CvFILE(cv) && !CvISXSUB(cv)) { | |
286 | /* for XSUBs CvFILE point directly to static memory; __FILE__ */ | |
287 | Safefree(CvFILE(cv)); | |
288 | } | |
289 | CvFILE(cv) = NULL; | |
290 | #endif | |
dd2155a4 | 291 | |
c4528262 NC |
292 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
293 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
294 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
295 | ENTER; | |
296 | ||
297 | PAD_SAVE_SETNULLPAD(); | |
298 | ||
299 | op_free(CvROOT(cv)); | |
300 | CvROOT(cv) = NULL; | |
301 | CvSTART(cv) = NULL; | |
302 | LEAVE; | |
303 | } | |
304 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ | |
305 | CvGV_set(cv, NULL); | |
306 | ||
c2736fce NC |
307 | /* This statement and the subsequence if block was pad_undef(). */ |
308 | pad_peg("pad_undef"); | |
309 | ||
310 | if (padlist && !SvIS_FREED(padlist) /* may be during global destruction */ | |
311 | ) { | |
312 | I32 ix; | |
313 | ||
314 | /* Free the padlist associated with a CV. | |
315 | If parts of it happen to be current, we null the relevant PL_*pad* | |
316 | global vars so that we don't have any dangling references left. | |
317 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
318 | subs to the outer of this cv. */ | |
319 | ||
320 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
321 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
322 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
323 | ); | |
324 | ||
325 | /* detach any '&' anon children in the pad; if afterwards they | |
326 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
327 | * bypassing us. */ | |
328 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
329 | * children, or integrate this loop with general cleanup */ | |
330 | ||
331 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
332 | CV * const outercv = CvOUTSIDE(cv); | |
333 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
334 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); | |
335 | SV ** const namepad = AvARRAY(comppad_name); | |
336 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
337 | SV ** const curpad = AvARRAY(comppad); | |
338 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
339 | SV * const namesv = namepad[ix]; | |
340 | if (namesv && namesv != &PL_sv_undef | |
341 | && *SvPVX_const(namesv) == '&') | |
342 | { | |
343 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
344 | U32 inner_rc = SvREFCNT(innercv); | |
345 | assert(inner_rc); | |
346 | namepad[ix] = NULL; | |
347 | SvREFCNT_dec(namesv); | |
348 | ||
349 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
350 | curpad[ix] = NULL; | |
351 | SvREFCNT_dec(innercv); | |
352 | inner_rc--; | |
353 | } | |
354 | ||
355 | /* in use, not just a prototype */ | |
356 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
357 | assert(CvWEAKOUTSIDE(innercv)); | |
358 | /* don't relink to grandfather if he's being freed */ | |
359 | if (outercv && SvREFCNT(outercv)) { | |
360 | CvWEAKOUTSIDE_off(innercv); | |
361 | CvOUTSIDE(innercv) = outercv; | |
362 | CvOUTSIDE_SEQ(innercv) = seq; | |
363 | SvREFCNT_inc_simple_void_NN(outercv); | |
364 | } | |
365 | else { | |
366 | CvOUTSIDE(innercv) = NULL; | |
367 | } | |
368 | } | |
369 | } | |
370 | } | |
371 | } | |
372 | ||
373 | ix = AvFILLp(padlist); | |
aa2f79cf | 374 | while (ix > 0) { |
c2736fce NC |
375 | SV* const sv = AvARRAY(padlist)[ix--]; |
376 | if (sv) { | |
aa2f79cf | 377 | if (sv == (const SV *)PL_comppad) { |
c2736fce NC |
378 | PL_comppad = NULL; |
379 | PL_curpad = NULL; | |
380 | } | |
aa2f79cf | 381 | SvREFCNT_dec(sv); |
c2736fce | 382 | } |
aa2f79cf NC |
383 | } |
384 | { | |
385 | SV *const sv = AvARRAY(padlist)[0]; | |
386 | if (sv == (const SV *)PL_comppad_name) | |
387 | PL_comppad_name = NULL; | |
c2736fce NC |
388 | SvREFCNT_dec(sv); |
389 | } | |
390 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); | |
391 | CvPADLIST(cv) = NULL; | |
392 | } | |
393 | ||
c4528262 NC |
394 | |
395 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
396 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
397 | if (!CvWEAKOUTSIDE(cv)) | |
398 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
399 | CvOUTSIDE(cv) = NULL; | |
400 | } | |
401 | if (CvCONST(cv)) { | |
402 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
403 | CvCONST_off(cv); | |
404 | } | |
405 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
406 | CvXSUB(cv) = NULL; | |
407 | } | |
408 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
409 | * ref status of CvOUTSIDE and CvGV */ | |
410 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC); | |
411 | } | |
dd2155a4 | 412 | |
3291825f NC |
413 | static PADOFFSET |
414 | S_pad_add_name_sv(pTHX_ SV *namesv, const U32 flags, HV *typestash, | |
415 | HV *ourstash) | |
416 | { | |
417 | dVAR; | |
418 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
419 | ||
420 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
421 | ||
422 | ASSERT_CURPAD_ACTIVE("pad_add_name"); | |
423 | ||
424 | if (typestash) { | |
425 | assert(SvTYPE(namesv) == SVt_PVMG); | |
426 | SvPAD_TYPED_on(namesv); | |
427 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
428 | } | |
429 | if (ourstash) { | |
430 | SvPAD_OUR_on(namesv); | |
431 | SvOURSTASH_set(namesv, ourstash); | |
432 | SvREFCNT_inc_simple_void_NN(ourstash); | |
433 | } | |
59cfed7d | 434 | else if (flags & padadd_STATE) { |
3291825f NC |
435 | SvPAD_STATE_on(namesv); |
436 | } | |
437 | ||
438 | av_store(PL_comppad_name, offset, namesv); | |
439 | return offset; | |
440 | } | |
441 | ||
dd2155a4 DM |
442 | /* |
443 | =for apidoc pad_add_name | |
444 | ||
b5c19bd7 DM |
445 | Create a new name and associated PADMY SV in the current pad; return the |
446 | offset. | |
dd2155a4 DM |
447 | If C<typestash> is valid, the name is for a typed lexical; set the |
448 | name's stash to that value. | |
449 | If C<ourstash> is valid, it's an our lexical, set the name's | |
73d95100 | 450 | SvOURSTASH to that value |
dd2155a4 | 451 | |
dd2155a4 DM |
452 | If fake, it means we're cloning an existing entry |
453 | ||
454 | =cut | |
455 | */ | |
456 | ||
dd2155a4 | 457 | PADOFFSET |
cca43f78 NC |
458 | Perl_pad_add_name(pTHX_ const char *name, const STRLEN len, const U32 flags, |
459 | HV *typestash, HV *ourstash) | |
dd2155a4 | 460 | { |
97aff369 | 461 | dVAR; |
3291825f | 462 | PADOFFSET offset; |
cca43f78 | 463 | SV *namesv; |
dd2155a4 | 464 | |
7918f24d NC |
465 | PERL_ARGS_ASSERT_PAD_ADD_NAME; |
466 | ||
59cfed7d | 467 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK)) |
cca43f78 NC |
468 | Perl_croak(aTHX_ "panic: pad_add_name illegal flag bits 0x%" UVxf, |
469 | (UV)flags); | |
470 | ||
471 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
472 | ||
473 | /* Until we're using the length for real, cross check that we're being told | |
474 | the truth. */ | |
475 | PERL_UNUSED_ARG(len); | |
476 | assert(strlen(name) == len); | |
477 | ||
dd2155a4 DM |
478 | sv_setpv(namesv, name); |
479 | ||
59cfed7d | 480 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
2d12d04f | 481 | /* check for duplicate declaration */ |
59cfed7d | 482 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
2d12d04f NC |
483 | } |
484 | ||
3291825f NC |
485 | offset = pad_add_name_sv(namesv, flags, typestash, ourstash); |
486 | ||
487 | /* not yet introduced */ | |
2df5bdd7 DM |
488 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
489 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
490 | |
491 | if (!PL_min_intro_pending) | |
492 | PL_min_intro_pending = offset; | |
493 | PL_max_intro_pending = offset; | |
494 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
495 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
496 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
3291825f | 497 | if (*name == '@') |
c1bf42f3 | 498 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
3291825f | 499 | else if (*name == '%') |
c1bf42f3 NC |
500 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
501 | assert(SvPADMY(PL_curpad[offset])); | |
3291825f NC |
502 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
503 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
504 | (long)offset, name, PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
505 | |
506 | return offset; | |
507 | } | |
508 | ||
509 | ||
510 | ||
511 | ||
512 | /* | |
513 | =for apidoc pad_alloc | |
514 | ||
515 | Allocate a new my or tmp pad entry. For a my, simply push a null SV onto | |
516 | the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards | |
cf525c36 | 517 | for a slot which has no name and no active value. |
dd2155a4 DM |
518 | |
519 | =cut | |
520 | */ | |
521 | ||
522 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
523 | * or at least rationalise ??? */ | |
6d640399 NC |
524 | /* And flag whether the incoming name is UTF8 or 8 bit? |
525 | Could do this either with the +ve/-ve hack of the HV code, or expanding | |
526 | the flag bits. Either way, this makes proper Unicode safe pad support. | |
6d640399 NC |
527 | NWC |
528 | */ | |
dd2155a4 DM |
529 | |
530 | PADOFFSET | |
531 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
532 | { | |
97aff369 | 533 | dVAR; |
dd2155a4 DM |
534 | SV *sv; |
535 | I32 retval; | |
536 | ||
6136c704 | 537 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
538 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
539 | ||
dd2155a4 DM |
540 | if (AvARRAY(PL_comppad) != PL_curpad) |
541 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
542 | if (PL_pad_reset_pending) | |
543 | pad_reset(); | |
544 | if (tmptype & SVs_PADMY) { | |
235cc2e3 | 545 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
546 | retval = AvFILLp(PL_comppad); |
547 | } | |
548 | else { | |
551405c4 | 549 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 550 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
551 | for (;;) { |
552 | /* | |
553 | * "foreach" index vars temporarily become aliases to non-"my" | |
554 | * values. Thus we must skip, not just pad values that are | |
555 | * marked as current pad values, but also those with names. | |
556 | */ | |
557 | /* HVDS why copy to sv here? we don't seem to use it */ | |
558 | if (++PL_padix <= names_fill && | |
559 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
560 | continue; | |
561 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
562 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
563 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
564 | break; | |
565 | } | |
566 | retval = PL_padix; | |
567 | } | |
568 | SvFLAGS(sv) |= tmptype; | |
569 | PL_curpad = AvARRAY(PL_comppad); | |
570 | ||
571 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
572 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
573 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
574 | PL_op_name[optype])); | |
fd0854ff DM |
575 | #ifdef DEBUG_LEAKING_SCALARS |
576 | sv->sv_debug_optype = optype; | |
577 | sv->sv_debug_inpad = 1; | |
fd0854ff | 578 | #endif |
a212c8b5 | 579 | return (PADOFFSET)retval; |
dd2155a4 DM |
580 | } |
581 | ||
582 | /* | |
583 | =for apidoc pad_add_anon | |
584 | ||
585 | Add an anon code entry to the current compiling pad | |
586 | ||
587 | =cut | |
588 | */ | |
589 | ||
590 | PADOFFSET | |
591 | Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type) | |
592 | { | |
97aff369 | 593 | dVAR; |
dd2155a4 | 594 | PADOFFSET ix; |
b9f83d2f | 595 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
596 | |
597 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
598 | ||
1dba731d | 599 | pad_peg("add_anon"); |
76f68e9b | 600 | sv_setpvs(name, "&"); |
0d311cdb DM |
601 | /* These two aren't used; just make sure they're not equal to |
602 | * PERL_PADSEQ_INTRO */ | |
603 | COP_SEQ_RANGE_LOW_set(name, 0); | |
604 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
dd2155a4 DM |
605 | ix = pad_alloc(op_type, SVs_PADMY); |
606 | av_store(PL_comppad_name, ix, name); | |
f3548bdc | 607 | /* XXX DAPM use PL_curpad[] ? */ |
dd2155a4 DM |
608 | av_store(PL_comppad, ix, sv); |
609 | SvPADMY_on(sv); | |
7dafbf52 DM |
610 | |
611 | /* to avoid ref loops, we never have parent + child referencing each | |
612 | * other simultaneously */ | |
ea726b52 NC |
613 | if (CvOUTSIDE((const CV *)sv)) { |
614 | assert(!CvWEAKOUTSIDE((const CV *)sv)); | |
615 | CvWEAKOUTSIDE_on(MUTABLE_CV(sv)); | |
616 | SvREFCNT_dec(CvOUTSIDE(MUTABLE_CV(sv))); | |
7dafbf52 | 617 | } |
dd2155a4 DM |
618 | return ix; |
619 | } | |
620 | ||
621 | ||
622 | ||
623 | /* | |
624 | =for apidoc pad_check_dup | |
625 | ||
626 | Check for duplicate declarations: report any of: | |
627 | * a my in the current scope with the same name; | |
628 | * an our (anywhere in the pad) with the same name and the same stash | |
629 | as C<ourstash> | |
630 | C<is_our> indicates that the name to check is an 'our' declaration | |
631 | ||
632 | =cut | |
633 | */ | |
634 | ||
20381b50 | 635 | STATIC void |
2d12d04f | 636 | S_pad_check_dup(pTHX_ SV *name, const U32 flags, const HV *ourstash) |
dd2155a4 | 637 | { |
97aff369 | 638 | dVAR; |
53c1dcc0 | 639 | SV **svp; |
dd2155a4 | 640 | PADOFFSET top, off; |
59cfed7d | 641 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 642 | |
7918f24d NC |
643 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
644 | ||
f3548bdc | 645 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 646 | |
59cfed7d | 647 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 648 | |
041457d9 | 649 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
650 | return; /* nothing to check */ |
651 | ||
652 | svp = AvARRAY(PL_comppad_name); | |
653 | top = AvFILLp(PL_comppad_name); | |
654 | /* check the current scope */ | |
655 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
656 | * type ? */ | |
657 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
658 | SV * const sv = svp[off]; |
659 | if (sv | |
dd2155a4 | 660 | && sv != &PL_sv_undef |
ee6cee0c | 661 | && !SvFAKE(sv) |
0d311cdb DM |
662 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
663 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 664 | && sv_eq(name, sv)) |
dd2155a4 | 665 | { |
00b1698f | 666 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 667 | break; /* "our" masking "our" */ |
dd2155a4 | 668 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 | 669 | "\"%s\" variable %"SVf" masks earlier declaration in same %s", |
12bd6ede | 670 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
c541b9b4 | 671 | sv, |
2df5bdd7 DM |
672 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
673 | ? "scope" : "statement")); | |
dd2155a4 DM |
674 | --off; |
675 | break; | |
676 | } | |
677 | } | |
678 | /* check the rest of the pad */ | |
679 | if (is_our) { | |
61c5492a | 680 | while (off > 0) { |
53c1dcc0 AL |
681 | SV * const sv = svp[off]; |
682 | if (sv | |
dd2155a4 | 683 | && sv != &PL_sv_undef |
ee6cee0c | 684 | && !SvFAKE(sv) |
0d311cdb DM |
685 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
686 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 687 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 688 | && sv_eq(name, sv)) |
dd2155a4 DM |
689 | { |
690 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c541b9b4 | 691 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 | 692 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
693 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
694 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
695 | break; |
696 | } | |
61c5492a NC |
697 | --off; |
698 | } | |
dd2155a4 DM |
699 | } |
700 | } | |
701 | ||
702 | ||
dd2155a4 DM |
703 | /* |
704 | =for apidoc pad_findmy | |
705 | ||
706 | Given a lexical name, try to find its offset, first in the current pad, | |
707 | or failing that, in the pads of any lexically enclosing subs (including | |
708 | the complications introduced by eval). If the name is found in an outer pad, | |
709 | then a fake entry is added to the current pad. | |
710 | Returns the offset in the current pad, or NOT_IN_PAD on failure. | |
711 | ||
712 | =cut | |
713 | */ | |
714 | ||
715 | PADOFFSET | |
f8f98e0a | 716 | Perl_pad_findmy(pTHX_ const char *name, STRLEN len, U32 flags) |
dd2155a4 | 717 | { |
97aff369 | 718 | dVAR; |
b5c19bd7 DM |
719 | SV *out_sv; |
720 | int out_flags; | |
929a0744 | 721 | I32 offset; |
e1ec3a88 | 722 | const AV *nameav; |
929a0744 | 723 | SV **name_svp; |
dd2155a4 | 724 | |
7918f24d NC |
725 | PERL_ARGS_ASSERT_PAD_FINDMY; |
726 | ||
1dba731d | 727 | pad_peg("pad_findmy"); |
f8f98e0a NC |
728 | |
729 | if (flags) | |
730 | Perl_croak(aTHX_ "panic: pad_findmy illegal flag bits 0x%" UVxf, | |
731 | (UV)flags); | |
732 | ||
733 | /* Yes, it is a bug (read work in progress) that we're not really using this | |
734 | length parameter, and instead relying on strlen() later on. But I'm not | |
735 | comfortable about changing the pad API piecemeal to use and rely on | |
736 | lengths. This only exists to avoid an "unused parameter" warning. */ | |
737 | if (len < 2) | |
738 | return NOT_IN_PAD; | |
739 | ||
740 | /* But until we're using the length for real, cross check that we're being | |
741 | told the truth. */ | |
742 | assert(strlen(name) == len); | |
743 | ||
9f7d9405 | 744 | offset = pad_findlex(name, PL_compcv, PL_cop_seqmax, 1, |
4608196e | 745 | NULL, &out_sv, &out_flags); |
9f7d9405 | 746 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
747 | return offset; |
748 | ||
749 | /* look for an our that's being introduced; this allows | |
750 | * our $foo = 0 unless defined $foo; | |
751 | * to not give a warning. (Yes, this is a hack) */ | |
752 | ||
502c6561 | 753 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 DM |
754 | name_svp = AvARRAY(nameav); |
755 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 756 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
757 | if (namesv && namesv != &PL_sv_undef |
758 | && !SvFAKE(namesv) | |
00b1698f | 759 | && (SvPAD_OUR(namesv)) |
b15aece3 | 760 | && strEQ(SvPVX_const(namesv), name) |
2df5bdd7 | 761 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
762 | ) |
763 | return offset; | |
764 | } | |
765 | return NOT_IN_PAD; | |
dd2155a4 DM |
766 | } |
767 | ||
e1f795dc RGS |
768 | /* |
769 | * Returns the offset of a lexical $_, if there is one, at run time. | |
770 | * Used by the UNDERBAR XS macro. | |
771 | */ | |
772 | ||
773 | PADOFFSET | |
29289021 | 774 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 775 | { |
97aff369 | 776 | dVAR; |
e1f795dc RGS |
777 | SV *out_sv; |
778 | int out_flags; | |
779 | return pad_findlex("$_", find_runcv(NULL), PL_curcop->cop_seq, 1, | |
4608196e | 780 | NULL, &out_sv, &out_flags); |
e1f795dc | 781 | } |
dd2155a4 | 782 | |
dd2155a4 | 783 | /* |
789bd863 VP |
784 | * Returns a lexical $_, if there is one, at run time ; or the global one |
785 | * otherwise. | |
786 | */ | |
787 | ||
788 | SV * | |
789 | Perl_find_rundefsv(pTHX) | |
790 | { | |
791 | SV *namesv; | |
792 | int flags; | |
793 | PADOFFSET po; | |
794 | ||
795 | po = pad_findlex("$_", find_runcv(NULL), PL_curcop->cop_seq, 1, | |
796 | NULL, &namesv, &flags); | |
797 | ||
1979170b | 798 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
799 | return DEFSV; |
800 | ||
801 | return PAD_SVl(po); | |
802 | } | |
803 | ||
804 | /* | |
dd2155a4 DM |
805 | =for apidoc pad_findlex |
806 | ||
807 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
808 | in the inner pads if it's found in an outer one. |
809 | ||
810 | Returns the offset in the bottom pad of the lex or the fake lex. | |
811 | cv is the CV in which to start the search, and seq is the current cop_seq | |
812 | to match against. If warn is true, print appropriate warnings. The out_* | |
813 | vars return values, and so are pointers to where the returned values | |
814 | should be stored. out_capture, if non-null, requests that the innermost | |
815 | instance of the lexical is captured; out_name_sv is set to the innermost | |
816 | matched namesv or fake namesv; out_flags returns the flags normally | |
817 | associated with the IVX field of a fake namesv. | |
818 | ||
819 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
820 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 821 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 822 | the parent pad. |
dd2155a4 DM |
823 | |
824 | =cut | |
825 | */ | |
826 | ||
b5c19bd7 DM |
827 | /* the CV has finished being compiled. This is not a sufficient test for |
828 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
829 | #define CvCOMPILED(cv) CvROOT(cv) | |
830 | ||
71f882da DM |
831 | /* the CV does late binding of its lexicals */ |
832 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
833 | ||
b5c19bd7 | 834 | |
dd2155a4 | 835 | STATIC PADOFFSET |
e1ec3a88 | 836 | S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn, |
b5c19bd7 | 837 | SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 838 | { |
97aff369 | 839 | dVAR; |
b5c19bd7 DM |
840 | I32 offset, new_offset; |
841 | SV *new_capture; | |
842 | SV **new_capturep; | |
b64e5050 | 843 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 844 | |
7918f24d NC |
845 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
846 | ||
b5c19bd7 | 847 | *out_flags = 0; |
a3985cdc | 848 | |
b5c19bd7 DM |
849 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
850 | "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n", | |
851 | PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" )); | |
dd2155a4 | 852 | |
b5c19bd7 | 853 | /* first, search this pad */ |
dd2155a4 | 854 | |
b5c19bd7 DM |
855 | if (padlist) { /* not an undef CV */ |
856 | I32 fake_offset = 0; | |
502c6561 | 857 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 858 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 859 | |
b5c19bd7 | 860 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 861 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 862 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 863 | && strEQ(SvPVX_const(namesv), name)) |
b5c19bd7 | 864 | { |
6012dc80 | 865 | if (SvFAKE(namesv)) { |
b5c19bd7 | 866 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
867 | continue; |
868 | } | |
869 | /* is seq within the range _LOW to _HIGH ? | |
870 | * This is complicated by the fact that PL_cop_seqmax | |
871 | * may have wrapped around at some point */ | |
872 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
873 | continue; /* not yet introduced */ | |
874 | ||
875 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
876 | /* in compiling scope */ | |
877 | if ( | |
878 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
879 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
880 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
881 | ) | |
882 | break; | |
883 | } | |
884 | else if ( | |
885 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
886 | ? | |
887 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
888 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
889 | ||
890 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
891 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
892 | ) | |
893 | break; | |
ee6cee0c DM |
894 | } |
895 | } | |
896 | ||
b5c19bd7 DM |
897 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
898 | if (offset > 0) { /* not fake */ | |
899 | fake_offset = 0; | |
900 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
901 | ||
902 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
903 | * instances. For now, we just test !CvUNIQUE(cv), but | |
904 | * ideally, we should detect my's declared within loops | |
905 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 906 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
907 | * lexes as not multi as viewed from evals. */ |
908 | ||
909 | *out_flags = CvANON(cv) ? | |
910 | PAD_FAKELEX_ANON : | |
911 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
912 | ? PAD_FAKELEX_MULTI : 0; | |
913 | ||
914 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
915 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
916 | PTR2UV(cv), (long)offset, | |
917 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
918 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
919 | } |
920 | else { /* fake match */ | |
921 | offset = fake_offset; | |
922 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 923 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 924 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 925 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 926 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 927 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
928 | )); |
929 | } | |
dd2155a4 | 930 | |
b5c19bd7 | 931 | /* return the lex? */ |
dd2155a4 | 932 | |
b5c19bd7 | 933 | if (out_capture) { |
dd2155a4 | 934 | |
b5c19bd7 | 935 | /* our ? */ |
00b1698f | 936 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 937 | *out_capture = NULL; |
b5c19bd7 DM |
938 | return offset; |
939 | } | |
ee6cee0c | 940 | |
b5c19bd7 DM |
941 | /* trying to capture from an anon prototype? */ |
942 | if (CvCOMPILED(cv) | |
943 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
944 | : *out_flags & PAD_FAKELEX_ANON) | |
945 | { | |
a2a5de95 NC |
946 | if (warn) |
947 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
948 | "Variable \"%s\" is not available", name); | |
a0714e2c | 949 | *out_capture = NULL; |
b5c19bd7 | 950 | } |
ee6cee0c | 951 | |
b5c19bd7 DM |
952 | /* real value */ |
953 | else { | |
954 | int newwarn = warn; | |
955 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 956 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
957 | && warn && ckWARN(WARN_CLOSURE)) { |
958 | newwarn = 0; | |
959 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
960 | "Variable \"%s\" will not stay shared", name); | |
961 | } | |
dd2155a4 | 962 | |
b5c19bd7 DM |
963 | if (fake_offset && CvANON(cv) |
964 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
965 | { | |
966 | SV *n; | |
967 | /* not yet caught - look further up */ | |
968 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
969 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
970 | PTR2UV(cv))); | |
971 | n = *out_name_sv; | |
282e1742 DM |
972 | (void) pad_findlex(name, CvOUTSIDE(cv), |
973 | CvOUTSIDE_SEQ(cv), | |
b5c19bd7 DM |
974 | newwarn, out_capture, out_name_sv, out_flags); |
975 | *out_name_sv = n; | |
976 | return offset; | |
dd2155a4 | 977 | } |
b5c19bd7 | 978 | |
502c6561 NC |
979 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
980 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
981 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
982 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 983 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 984 | |
d1186544 DM |
985 | if (SvPADSTALE(*out_capture) |
986 | && !SvPAD_STATE(name_svp[offset])) | |
987 | { | |
a2a5de95 NC |
988 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
989 | "Variable \"%s\" is not available", name); | |
a0714e2c | 990 | *out_capture = NULL; |
dd2155a4 DM |
991 | } |
992 | } | |
b5c19bd7 DM |
993 | if (!*out_capture) { |
994 | if (*name == '@') | |
ad64d0ec | 995 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
b5c19bd7 | 996 | else if (*name == '%') |
ad64d0ec | 997 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
998 | else |
999 | *out_capture = sv_newmortal(); | |
1000 | } | |
dd2155a4 | 1001 | } |
b5c19bd7 DM |
1002 | |
1003 | return offset; | |
ee6cee0c | 1004 | } |
b5c19bd7 DM |
1005 | } |
1006 | ||
1007 | /* it's not in this pad - try above */ | |
1008 | ||
1009 | if (!CvOUTSIDE(cv)) | |
1010 | return NOT_IN_PAD; | |
9f7d9405 | 1011 | |
b5c19bd7 | 1012 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1013 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1014 | new_capturep = out_capture ? out_capture : |
4608196e | 1015 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 DM |
1016 | |
1017 | offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
1018 | new_capturep, out_name_sv, out_flags); | |
9f7d9405 | 1019 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1020 | return NOT_IN_PAD; |
9f7d9405 | 1021 | |
b5c19bd7 DM |
1022 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1023 | ||
1024 | /* don't add new fake entries (via eval) to CVs that we have already | |
1025 | * finished compiling, or to undef CVs */ | |
1026 | if (CvCOMPILED(cv) || !padlist) | |
1027 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1028 | ||
1029 | { | |
3291825f | 1030 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1031 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1032 | "good" and only copying flag bits and pointers that it understands. |
1033 | */ | |
1034 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1035 | AV * const ocomppad_name = PL_comppad_name; |
1036 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
1037 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1038 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
1039 | PL_curpad = AvARRAY(PL_comppad); |
1040 | ||
3291825f NC |
1041 | new_offset |
1042 | = pad_add_name_sv(new_namesv, | |
59cfed7d | 1043 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1044 | SvPAD_TYPED(*out_name_sv) |
1045 | ? SvSTASH(*out_name_sv) : NULL, | |
1046 | SvOURSTASH(*out_name_sv) | |
1047 | ); | |
1048 | ||
1049 | SvFAKE_on(new_namesv); | |
1050 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1051 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1052 | (long)new_offset, | |
1053 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1054 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1055 | |
809abb02 | 1056 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1057 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1058 | NOOP; /* do nothing */ |
b5c19bd7 | 1059 | } |
71f882da | 1060 | else if (CvLATE(cv)) { |
b5c19bd7 | 1061 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1062 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1063 | CvCLONE_on(cv); |
1064 | } | |
1065 | else { | |
1066 | /* immediate creation - capture outer value right now */ | |
1067 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
1068 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1069 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1070 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1071 | } |
b5c19bd7 | 1072 | *out_name_sv = new_namesv; |
809abb02 | 1073 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1074 | |
1075 | PL_comppad_name = ocomppad_name; | |
1076 | PL_comppad = ocomppad; | |
4608196e | 1077 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1078 | } |
b5c19bd7 | 1079 | return new_offset; |
dd2155a4 DM |
1080 | } |
1081 | ||
fb8a9836 AL |
1082 | |
1083 | #ifdef DEBUGGING | |
dd2155a4 DM |
1084 | /* |
1085 | =for apidoc pad_sv | |
1086 | ||
1087 | Get the value at offset po in the current pad. | |
1088 | Use macro PAD_SV instead of calling this function directly. | |
1089 | ||
1090 | =cut | |
1091 | */ | |
1092 | ||
1093 | ||
1094 | SV * | |
1095 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1096 | { | |
97aff369 | 1097 | dVAR; |
f3548bdc | 1098 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1099 | |
dd2155a4 DM |
1100 | if (!po) |
1101 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1102 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1103 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1104 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1105 | ); |
1106 | return PL_curpad[po]; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | /* | |
1111 | =for apidoc pad_setsv | |
1112 | ||
1113 | Set the entry at offset po in the current pad to sv. | |
1114 | Use the macro PAD_SETSV() rather than calling this function directly. | |
1115 | ||
1116 | =cut | |
1117 | */ | |
1118 | ||
dd2155a4 DM |
1119 | void |
1120 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1121 | { | |
97aff369 | 1122 | dVAR; |
7918f24d NC |
1123 | |
1124 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1125 | ||
f3548bdc | 1126 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1127 | |
1128 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1129 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1130 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1131 | ); |
1132 | PL_curpad[po] = sv; | |
1133 | } | |
1134 | #endif | |
1135 | ||
1136 | ||
1137 | ||
1138 | /* | |
1139 | =for apidoc pad_block_start | |
1140 | ||
1141 | Update the pad compilation state variables on entry to a new block | |
1142 | ||
1143 | =cut | |
1144 | */ | |
1145 | ||
1146 | /* XXX DAPM perhaps: | |
1147 | * - integrate this in general state-saving routine ??? | |
1148 | * - combine with the state-saving going on in pad_new ??? | |
1149 | * - introduce a new SAVE type that does all this in one go ? | |
1150 | */ | |
1151 | ||
1152 | void | |
1153 | Perl_pad_block_start(pTHX_ int full) | |
1154 | { | |
97aff369 | 1155 | dVAR; |
f3548bdc | 1156 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1157 | SAVEI32(PL_comppad_name_floor); |
1158 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1159 | if (full) | |
1160 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1161 | if (PL_comppad_name_floor < 0) | |
1162 | PL_comppad_name_floor = 0; | |
1163 | SAVEI32(PL_min_intro_pending); | |
1164 | SAVEI32(PL_max_intro_pending); | |
1165 | PL_min_intro_pending = 0; | |
1166 | SAVEI32(PL_comppad_name_fill); | |
1167 | SAVEI32(PL_padix_floor); | |
1168 | PL_padix_floor = PL_padix; | |
1169 | PL_pad_reset_pending = FALSE; | |
1170 | } | |
1171 | ||
1172 | ||
1173 | /* | |
1174 | =for apidoc intro_my | |
1175 | ||
1176 | "Introduce" my variables to visible status. | |
1177 | ||
1178 | =cut | |
1179 | */ | |
1180 | ||
1181 | U32 | |
1182 | Perl_intro_my(pTHX) | |
1183 | { | |
97aff369 | 1184 | dVAR; |
dd2155a4 | 1185 | SV **svp; |
dd2155a4 | 1186 | I32 i; |
6012dc80 | 1187 | U32 seq; |
dd2155a4 | 1188 | |
f3548bdc | 1189 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1190 | if (! PL_min_intro_pending) |
1191 | return PL_cop_seqmax; | |
1192 | ||
1193 | svp = AvARRAY(PL_comppad_name); | |
1194 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1195 | SV * const sv = svp[i]; |
1196 | ||
0d311cdb DM |
1197 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1198 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1199 | { | |
2df5bdd7 | 1200 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1201 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1202 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1203 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1204 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1205 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1206 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1207 | ); |
1208 | } | |
1209 | } | |
6012dc80 DM |
1210 | seq = PL_cop_seqmax; |
1211 | PL_cop_seqmax++; | |
1212 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1213 | PL_cop_seqmax++; | |
dd2155a4 DM |
1214 | PL_min_intro_pending = 0; |
1215 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1216 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1217 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1218 | |
6012dc80 | 1219 | return seq; |
dd2155a4 DM |
1220 | } |
1221 | ||
1222 | /* | |
1223 | =for apidoc pad_leavemy | |
1224 | ||
1225 | Cleanup at end of scope during compilation: set the max seq number for | |
1226 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1227 | ||
1228 | =cut | |
1229 | */ | |
1230 | ||
1231 | void | |
1232 | Perl_pad_leavemy(pTHX) | |
1233 | { | |
97aff369 | 1234 | dVAR; |
dd2155a4 | 1235 | I32 off; |
551405c4 | 1236 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1237 | |
1238 | PL_pad_reset_pending = FALSE; | |
1239 | ||
f3548bdc | 1240 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1241 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1242 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1243 | const SV * const sv = svp[off]; |
9b387841 NC |
1244 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1245 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1246 | "%"SVf" never introduced", | |
1247 | SVfARG(sv)); | |
dd2155a4 DM |
1248 | } |
1249 | } | |
1250 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1251 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1252 | const SV * const sv = svp[off]; |
2df5bdd7 DM |
1253 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1254 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1255 | { | |
809abb02 | 1256 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1257 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1258 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1259 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1260 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1261 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1262 | ); |
1263 | } | |
1264 | } | |
1265 | PL_cop_seqmax++; | |
6012dc80 DM |
1266 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1267 | PL_cop_seqmax++; | |
dd2155a4 DM |
1268 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1269 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1270 | } | |
1271 | ||
1272 | ||
1273 | /* | |
1274 | =for apidoc pad_swipe | |
1275 | ||
1276 | Abandon the tmp in the current pad at offset po and replace with a | |
1277 | new one. | |
1278 | ||
1279 | =cut | |
1280 | */ | |
1281 | ||
1282 | void | |
1283 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1284 | { | |
97aff369 | 1285 | dVAR; |
f3548bdc | 1286 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1287 | if (!PL_curpad) |
1288 | return; | |
1289 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1290 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1291 | if (!po) | |
1292 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1293 | ||
1294 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1295 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1296 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1297 | ||
1298 | if (PL_curpad[po]) | |
1299 | SvPADTMP_off(PL_curpad[po]); | |
1300 | if (refadjust) | |
1301 | SvREFCNT_dec(PL_curpad[po]); | |
1302 | ||
9ad9869c DM |
1303 | |
1304 | /* if pad tmps aren't shared between ops, then there's no need to | |
1305 | * create a new tmp when an existing op is freed */ | |
1306 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1307 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1308 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1309 | #else |
1310 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1311 | #endif |
dd2155a4 DM |
1312 | if ((I32)po < PL_padix) |
1313 | PL_padix = po - 1; | |
1314 | } | |
1315 | ||
1316 | ||
1317 | /* | |
1318 | =for apidoc pad_reset | |
1319 | ||
1320 | Mark all the current temporaries for reuse | |
1321 | ||
1322 | =cut | |
1323 | */ | |
1324 | ||
1325 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1326 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1327 | * on the stack by OPs that use them, there are several ways to get an alias | |
1328 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1329 | * We avoid doing this until we can think of a Better Way. | |
1330 | * GSAR 97-10-29 */ | |
1f676739 | 1331 | static void |
82af08ae | 1332 | S_pad_reset(pTHX) |
dd2155a4 | 1333 | { |
97aff369 | 1334 | dVAR; |
dd2155a4 | 1335 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 DM |
1336 | if (AvARRAY(PL_comppad) != PL_curpad) |
1337 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1338 | ||
1339 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1340 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1341 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1342 | (long)PL_padix, (long)PL_padix_floor | |
1343 | ) | |
1344 | ); | |
1345 | ||
1346 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1347 | register I32 po; |
dd2155a4 DM |
1348 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1349 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1350 | SvPADTMP_off(PL_curpad[po]); | |
1351 | } | |
1352 | PL_padix = PL_padix_floor; | |
1353 | } | |
1354 | #endif | |
1355 | PL_pad_reset_pending = FALSE; | |
1356 | } | |
1357 | ||
1358 | ||
1359 | /* | |
1360 | =for apidoc pad_tidy | |
1361 | ||
1362 | Tidy up a pad after we've finished compiling it: | |
1363 | * remove most stuff from the pads of anonsub prototypes; | |
1364 | * give it a @_; | |
1365 | * mark tmps as such. | |
1366 | ||
1367 | =cut | |
1368 | */ | |
1369 | ||
1370 | /* XXX DAPM surely most of this stuff should be done properly | |
1371 | * at the right time beforehand, rather than going around afterwards | |
1372 | * cleaning up our mistakes ??? | |
1373 | */ | |
1374 | ||
1375 | void | |
1376 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1377 | { | |
27da23d5 | 1378 | dVAR; |
dd2155a4 | 1379 | |
f3548bdc | 1380 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1381 | |
1382 | /* If this CV has had any 'eval-capable' ops planted in it | |
1383 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1384 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1385 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1386 | * the right CvOUTSIDE. | |
1387 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1388 | * executed within it. |
b5c19bd7 DM |
1389 | */ |
1390 | ||
1391 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1392 | const CV *cv; |
b5c19bd7 DM |
1393 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1394 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1395 | break; /* no need to mark already-compiled code */ | |
1396 | if (CvANON(cv)) { | |
1397 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1398 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1399 | CvCLONE_on(cv); | |
1400 | } | |
1401 | } | |
1402 | } | |
1403 | ||
dd2155a4 DM |
1404 | /* extend curpad to match namepad */ |
1405 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1406 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1407 | |
1408 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1409 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1410 | PADOFFSET ix; |
b5c19bd7 | 1411 | |
dd2155a4 DM |
1412 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1413 | SV *namesv; | |
1414 | ||
1415 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1416 | continue; | |
1417 | /* | |
1418 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1419 | * pad are anonymous subs. |
dd2155a4 DM |
1420 | * The rest are created anew during cloning. |
1421 | */ | |
a0714e2c | 1422 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1423 | namesv != &PL_sv_undef && |
b15aece3 | 1424 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1425 | { |
1426 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1427 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1428 | } |
1429 | } | |
1430 | } | |
1431 | else if (type == padtidy_SUB) { | |
1432 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1433 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1434 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1435 | AvREIFY_only(av); |
dd2155a4 DM |
1436 | } |
1437 | ||
4cee4ca8 | 1438 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1439 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1440 | PADOFFSET ix; |
dd2155a4 DM |
1441 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1442 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1443 | continue; | |
adf8f095 | 1444 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1445 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1446 | } else if (!SvFAKE(namep[ix])) { |
1447 | /* This is a work around for how the current implementation of | |
1448 | ?{ } blocks in regexps interacts with lexicals. | |
1449 | ||
1450 | One of our lexicals. | |
1451 | Can't do this on all lexicals, otherwise sub baz() won't | |
1452 | compile in | |
1453 | ||
1454 | my $foo; | |
1455 | ||
1456 | sub bar { ++$foo; } | |
1457 | ||
1458 | sub baz { ++$foo; } | |
1459 | ||
1460 | because completion of compiling &bar calling pad_tidy() | |
1461 | would cause (top level) $foo to be marked as stale, and | |
1462 | "no longer available". */ | |
1463 | SvPADSTALE_on(PL_curpad[ix]); | |
1464 | } | |
dd2155a4 DM |
1465 | } |
1466 | } | |
f3548bdc | 1467 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1468 | } |
1469 | ||
1470 | ||
1471 | /* | |
1472 | =for apidoc pad_free | |
1473 | ||
8627550a | 1474 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1475 | |
1476 | =cut | |
1477 | */ | |
1478 | ||
1479 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1480 | void | |
1481 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1482 | { | |
97aff369 | 1483 | dVAR; |
f3548bdc | 1484 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1485 | if (!PL_curpad) |
1486 | return; | |
1487 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1488 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1489 | if (!po) | |
1490 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1491 | ||
1492 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1493 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1494 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1495 | ); | |
1496 | ||
1497 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1498 | SvPADTMP_off(PL_curpad[po]); | |
dd2155a4 DM |
1499 | } |
1500 | if ((I32)po < PL_padix) | |
1501 | PL_padix = po - 1; | |
1502 | } | |
1503 | ||
1504 | ||
1505 | ||
1506 | /* | |
1507 | =for apidoc do_dump_pad | |
1508 | ||
1509 | Dump the contents of a padlist | |
1510 | ||
1511 | =cut | |
1512 | */ | |
1513 | ||
1514 | void | |
1515 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1516 | { | |
97aff369 | 1517 | dVAR; |
e1ec3a88 AL |
1518 | const AV *pad_name; |
1519 | const AV *pad; | |
dd2155a4 DM |
1520 | SV **pname; |
1521 | SV **ppad; | |
dd2155a4 DM |
1522 | I32 ix; |
1523 | ||
7918f24d NC |
1524 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1525 | ||
dd2155a4 DM |
1526 | if (!padlist) { |
1527 | return; | |
1528 | } | |
502c6561 NC |
1529 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1530 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1531 | pname = AvARRAY(pad_name); |
1532 | ppad = AvARRAY(pad); | |
1533 | Perl_dump_indent(aTHX_ level, file, | |
1534 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1535 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1536 | ); | |
1537 | ||
1538 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1539 | const SV *namesv = pname[ix]; |
dd2155a4 | 1540 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1541 | namesv = NULL; |
dd2155a4 DM |
1542 | } |
1543 | if (namesv) { | |
ee6cee0c DM |
1544 | if (SvFAKE(namesv)) |
1545 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1546 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1547 | (int) ix, |
1548 | PTR2UV(ppad[ix]), | |
1549 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1550 | SvPVX_const(namesv), |
809abb02 NC |
1551 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1552 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1553 | |
ee6cee0c DM |
1554 | ); |
1555 | else | |
1556 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1557 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1558 | (int) ix, |
1559 | PTR2UV(ppad[ix]), | |
1560 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1561 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1562 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1563 | SvPVX_const(namesv) |
ee6cee0c | 1564 | ); |
dd2155a4 DM |
1565 | } |
1566 | else if (full) { | |
1567 | Perl_dump_indent(aTHX_ level+1, file, | |
1568 | "%2d. 0x%"UVxf"<%lu>\n", | |
1569 | (int) ix, | |
1570 | PTR2UV(ppad[ix]), | |
1571 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1572 | ); | |
1573 | } | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | ||
1578 | ||
1579 | /* | |
1580 | =for apidoc cv_dump | |
1581 | ||
1582 | dump the contents of a CV | |
1583 | ||
1584 | =cut | |
1585 | */ | |
1586 | ||
1587 | #ifdef DEBUGGING | |
1588 | STATIC void | |
e1ec3a88 | 1589 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1590 | { |
97aff369 | 1591 | dVAR; |
53c1dcc0 AL |
1592 | const CV * const outside = CvOUTSIDE(cv); |
1593 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1594 | |
7918f24d NC |
1595 | PERL_ARGS_ASSERT_CV_DUMP; |
1596 | ||
dd2155a4 DM |
1597 | PerlIO_printf(Perl_debug_log, |
1598 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1599 | title, | |
1600 | PTR2UV(cv), | |
1601 | (CvANON(cv) ? "ANON" | |
71f882da | 1602 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1603 | : (cv == PL_main_cv) ? "MAIN" |
1604 | : CvUNIQUE(cv) ? "UNIQUE" | |
1605 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1606 | PTR2UV(outside), | |
1607 | (!outside ? "null" | |
1608 | : CvANON(outside) ? "ANON" | |
1609 | : (outside == PL_main_cv) ? "MAIN" | |
1610 | : CvUNIQUE(outside) ? "UNIQUE" | |
1611 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1612 | ||
1613 | PerlIO_printf(Perl_debug_log, | |
1614 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1615 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1616 | } | |
1617 | #endif /* DEBUGGING */ | |
1618 | ||
1619 | ||
1620 | ||
1621 | ||
1622 | ||
1623 | /* | |
1624 | =for apidoc cv_clone | |
1625 | ||
1626 | Clone a CV: make a new CV which points to the same code etc, but which | |
1627 | has a newly-created pad built by copying the prototype pad and capturing | |
1628 | any outer lexicals. | |
1629 | ||
1630 | =cut | |
1631 | */ | |
1632 | ||
1633 | CV * | |
1634 | Perl_cv_clone(pTHX_ CV *proto) | |
1635 | { | |
27da23d5 | 1636 | dVAR; |
dd2155a4 | 1637 | I32 ix; |
53c1dcc0 | 1638 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1639 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1640 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1641 | SV** const pname = AvARRAY(protopad_name); |
1642 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1643 | const I32 fname = AvFILLp(protopad_name); |
1644 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1645 | CV* cv; |
b5c19bd7 DM |
1646 | SV** outpad; |
1647 | CV* outside; | |
71f882da | 1648 | long depth; |
dd2155a4 | 1649 | |
7918f24d NC |
1650 | PERL_ARGS_ASSERT_CV_CLONE; |
1651 | ||
dd2155a4 DM |
1652 | assert(!CvUNIQUE(proto)); |
1653 | ||
71f882da DM |
1654 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1655 | * to a prototype; we instead want the cloned parent who called us. | |
1656 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1657 | ||
1658 | outside = CvOUTSIDE(proto); | |
1659 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1660 | outside = find_runcv(NULL); | |
1661 | depth = CvDEPTH(outside); | |
1662 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1663 | if (!depth) | |
1664 | depth = 1; | |
b5c19bd7 DM |
1665 | assert(CvPADLIST(outside)); |
1666 | ||
dd2155a4 DM |
1667 | ENTER; |
1668 | SAVESPTR(PL_compcv); | |
1669 | ||
ea726b52 | 1670 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
c794ca97 | 1671 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC); |
dd2155a4 DM |
1672 | CvCLONED_on(cv); |
1673 | ||
dd2155a4 | 1674 | #ifdef USE_ITHREADS |
aed2304a NC |
1675 | CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto) |
1676 | : savepv(CvFILE(proto)); | |
dd2155a4 DM |
1677 | #else |
1678 | CvFILE(cv) = CvFILE(proto); | |
1679 | #endif | |
b3f91e91 | 1680 | CvGV_set(cv,CvGV(proto)); |
c68d9564 | 1681 | CvSTASH_set(cv, CvSTASH(proto)); |
b34c0dd4 | 1682 | OP_REFCNT_LOCK; |
dd2155a4 | 1683 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1684 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1685 | CvSTART(cv) = CvSTART(proto); |
ea726b52 | 1686 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
b5c19bd7 | 1687 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1688 | |
1689 | if (SvPOK(proto)) | |
ad64d0ec | 1690 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 | 1691 | |
b7787f18 | 1692 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1693 | |
b5c19bd7 | 1694 | av_fill(PL_comppad, fpad); |
7aaef02a | 1695 | for (ix = fname; ix > 0; ix--) |
dd2155a4 DM |
1696 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
1697 | ||
dd2155a4 DM |
1698 | PL_curpad = AvARRAY(PL_comppad); |
1699 | ||
71f882da | 1700 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1701 | |
dd2155a4 | 1702 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1703 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1704 | SV *sv = NULL; | |
71f882da | 1705 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1706 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 | 1707 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da | 1708 | assert(sv); |
33894c1a DM |
1709 | /* formats may have an inactive parent, |
1710 | while my $x if $false can leave an active var marked as | |
d1186544 DM |
1711 | stale. And state vars are always available */ |
1712 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { | |
a2a5de95 NC |
1713 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
1714 | "Variable \"%s\" is not available", SvPVX_const(namesv)); | |
a0714e2c | 1715 | sv = NULL; |
71f882da | 1716 | } |
33894c1a | 1717 | else |
f84c484e | 1718 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1719 | } |
71f882da | 1720 | if (!sv) { |
b15aece3 | 1721 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 1722 | if (sigil == '&') |
dd2155a4 | 1723 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 1724 | else if (sigil == '@') |
ad64d0ec | 1725 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 1726 | else if (sigil == '%') |
ad64d0ec | 1727 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1728 | else |
561b68a9 | 1729 | sv = newSV(0); |
235cc2e3 | 1730 | SvPADMY_on(sv); |
0d3b281c DM |
1731 | /* reset the 'assign only once' flag on each state var */ |
1732 | if (SvPAD_STATE(namesv)) | |
1733 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
1734 | } |
1735 | } | |
1736 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 1737 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
1738 | } |
1739 | else { | |
561b68a9 | 1740 | sv = newSV(0); |
dd2155a4 | 1741 | SvPADTMP_on(sv); |
dd2155a4 | 1742 | } |
71f882da | 1743 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1744 | } |
1745 | ||
dd2155a4 DM |
1746 | DEBUG_Xv( |
1747 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1748 | cv_dump(outside, "Outside"); | |
1749 | cv_dump(proto, "Proto"); | |
1750 | cv_dump(cv, "To"); | |
1751 | ); | |
1752 | ||
1753 | LEAVE; | |
1754 | ||
1755 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1756 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1757 | * The prototype was marked as a candiate for const-ization, | |
1758 | * so try to grab the current const value, and if successful, | |
1759 | * turn into a const sub: | |
1760 | */ | |
551405c4 | 1761 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1762 | if (const_sv) { |
1763 | SvREFCNT_dec(cv); | |
bd61b366 | 1764 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
1765 | } |
1766 | else { | |
1767 | CvCONST_off(cv); | |
1768 | } | |
dd2155a4 DM |
1769 | } |
1770 | ||
1771 | return cv; | |
1772 | } | |
1773 | ||
1774 | ||
1775 | /* | |
1776 | =for apidoc pad_fixup_inner_anons | |
1777 | ||
1778 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1779 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1780 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1781 | |
1782 | =cut | |
1783 | */ | |
1784 | ||
1785 | void | |
1786 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1787 | { | |
97aff369 | 1788 | dVAR; |
dd2155a4 | 1789 | I32 ix; |
502c6561 NC |
1790 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1791 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
1792 | SV ** const namepad = AvARRAY(comppad_name); |
1793 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
1794 | |
1795 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
1796 | PERL_UNUSED_ARG(old_cv); |
1797 | ||
dd2155a4 | 1798 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 1799 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 1800 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 1801 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 1802 | { |
ea726b52 | 1803 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
1804 | assert(CvWEAKOUTSIDE(innercv)); |
1805 | assert(CvOUTSIDE(innercv) == old_cv); | |
1806 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
1807 | } |
1808 | } | |
1809 | } | |
1810 | ||
7dafbf52 | 1811 | |
dd2155a4 DM |
1812 | /* |
1813 | =for apidoc pad_push | |
1814 | ||
1815 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
1816 | this depth, in which case don't bother creating a new one. Then give |
1817 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
1818 | |
1819 | =cut | |
1820 | */ | |
1821 | ||
1822 | void | |
26019298 | 1823 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 1824 | { |
97aff369 | 1825 | dVAR; |
7918f24d NC |
1826 | |
1827 | PERL_ARGS_ASSERT_PAD_PUSH; | |
1828 | ||
b37c2d43 | 1829 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
1830 | SV** const svp = AvARRAY(padlist); |
1831 | AV* const newpad = newAV(); | |
1832 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
1833 | I32 ix = AvFILLp((const AV *)svp[1]); |
1834 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 1835 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
1836 | AV *av; |
1837 | ||
dd2155a4 DM |
1838 | for ( ;ix > 0; ix--) { |
1839 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 1840 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
1841 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
1842 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
1843 | || sigil == '&') | |
1844 | { | |
dd2155a4 DM |
1845 | /* outer lexical or anon code */ |
1846 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
1847 | } | |
1848 | else { /* our own lexical */ | |
26019298 AL |
1849 | SV *sv; |
1850 | if (sigil == '@') | |
ad64d0ec | 1851 | sv = MUTABLE_SV(newAV()); |
26019298 | 1852 | else if (sigil == '%') |
ad64d0ec | 1853 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1854 | else |
561b68a9 | 1855 | sv = newSV(0); |
26019298 | 1856 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1857 | SvPADMY_on(sv); |
1858 | } | |
1859 | } | |
1860 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 1861 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
1862 | } |
1863 | else { | |
1864 | /* save temporaries on recursion? */ | |
561b68a9 | 1865 | SV * const sv = newSV(0); |
26019298 | 1866 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1867 | SvPADTMP_on(sv); |
1868 | } | |
1869 | } | |
26019298 | 1870 | av = newAV(); |
ad64d0ec | 1871 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1872 | AvREIFY_only(av); |
26019298 | 1873 | |
ad64d0ec | 1874 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
1875 | AvFILLp(padlist) = depth; |
1876 | } | |
1877 | } | |
b21dc031 AL |
1878 | |
1879 | ||
1880 | HV * | |
1881 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
1882 | { | |
97aff369 | 1883 | dVAR; |
551405c4 | 1884 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 1885 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
1886 | return SvSTASH(*av); |
1887 | } | |
5c284bb0 | 1888 | return NULL; |
b21dc031 | 1889 | } |
66610fdd | 1890 | |
d5b1589c NC |
1891 | #if defined(USE_ITHREADS) |
1892 | ||
1893 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
1894 | ||
1895 | AV * | |
1896 | Perl_padlist_dup(pTHX_ AV *const srcpad, CLONE_PARAMS *const param) | |
1897 | { | |
1898 | AV *dstpad; | |
1899 | PERL_ARGS_ASSERT_PADLIST_DUP; | |
1900 | ||
1901 | if (!srcpad) | |
1902 | return NULL; | |
1903 | ||
1904 | assert(!AvREAL(srcpad)); | |
6de654a5 NC |
1905 | |
1906 | if (param->flags & CLONEf_COPY_STACKS | |
1907 | || SvREFCNT(AvARRAY(srcpad)[1]) > 1) { | |
1908 | /* XXX padlists are real, but pretend to be not */ | |
1909 | AvREAL_on(srcpad); | |
1910 | dstpad = av_dup_inc(srcpad, param); | |
1911 | AvREAL_off(srcpad); | |
1912 | AvREAL_off(dstpad); | |
1913 | assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1); | |
1914 | } else { | |
1915 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
1916 | to build anything other than the first level of pads. */ | |
1917 | ||
1918 | I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]); | |
1919 | AV *pad1; | |
05d04d9c | 1920 | const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0])); |
6de654a5 NC |
1921 | const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1]; |
1922 | SV **oldpad = AvARRAY(srcpad1); | |
1923 | SV **names; | |
1924 | SV **pad1a; | |
1925 | AV *args; | |
1926 | /* look for it in the table first. | |
1927 | I *think* that it shouldn't be possible to find it there. | |
1928 | Well, except for how Perl_sv_compile_2op() "works" :-( */ | |
1929 | dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad); | |
1930 | ||
1931 | if (dstpad) | |
1932 | return dstpad; | |
1933 | ||
1934 | dstpad = newAV(); | |
1935 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
1936 | AvREAL_off(dstpad); | |
1937 | av_extend(dstpad, 1); | |
1938 | AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param)); | |
1939 | names = AvARRAY(AvARRAY(dstpad)[0]); | |
1940 | ||
1941 | pad1 = newAV(); | |
1942 | ||
1943 | av_extend(pad1, ix); | |
1944 | AvARRAY(dstpad)[1] = MUTABLE_SV(pad1); | |
1945 | pad1a = AvARRAY(pad1); | |
1946 | AvFILLp(dstpad) = 1; | |
1947 | ||
1948 | if (ix > -1) { | |
1949 | AvFILLp(pad1) = ix; | |
1950 | ||
1951 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
1952 | if (!oldpad[ix]) { |
1953 | pad1a[ix] = NULL; | |
1954 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
1955 | const char sigil = SvPVX_const(names[ix])[0]; | |
1956 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
1957 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
1958 | || sigil == '&') | |
1959 | { | |
1960 | /* outer lexical or anon code */ | |
1961 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
1962 | } | |
1963 | else { /* our own lexical */ | |
adf8f095 NC |
1964 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
1965 | /* This is a work around for how the current | |
1966 | implementation of ?{ } blocks in regexps | |
1967 | interacts with lexicals. */ | |
05d04d9c NC |
1968 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
1969 | } else { | |
1970 | SV *sv; | |
1971 | ||
1972 | if (sigil == '@') | |
1973 | sv = MUTABLE_SV(newAV()); | |
1974 | else if (sigil == '%') | |
1975 | sv = MUTABLE_SV(newHV()); | |
1976 | else | |
1977 | sv = newSV(0); | |
1978 | pad1a[ix] = sv; | |
1979 | SvPADMY_on(sv); | |
1980 | } | |
1981 | } | |
1982 | } | |
1983 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
1984 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
1985 | } | |
1986 | else { | |
1987 | /* save temporaries on recursion? */ | |
1988 | SV * const sv = newSV(0); | |
1989 | pad1a[ix] = sv; | |
1990 | ||
1991 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
1992 | FIXTHAT before merging this branch. | |
1993 | (And I know how to) */ | |
1994 | if (SvPADMY(oldpad[ix])) | |
1995 | SvPADMY_on(sv); | |
1996 | else | |
1997 | SvPADTMP_on(sv); | |
1998 | } | |
6de654a5 NC |
1999 | } |
2000 | ||
2001 | if (oldpad[0]) { | |
2002 | args = newAV(); /* Will be @_ */ | |
2003 | AvREIFY_only(args); | |
2004 | pad1a[0] = (SV *)args; | |
2005 | } | |
2006 | } | |
2007 | } | |
d5b1589c NC |
2008 | |
2009 | return dstpad; | |
2010 | } | |
2011 | ||
2012 | #endif | |
2013 | ||
66610fdd RGS |
2014 | /* |
2015 | * Local variables: | |
2016 | * c-indentation-style: bsd | |
2017 | * c-basic-offset: 4 | |
2018 | * indent-tabs-mode: t | |
2019 | * End: | |
2020 | * | |
37442d52 RGS |
2021 | * ex: set ts=8 sts=4 sw=4 noet: |
2022 | */ |