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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 | ||
798 | if (po == NOT_IN_PAD | |
799 | || (SvFLAGS(namesv) & (SVpad_NAME|SVpad_OUR)) == (SVpad_NAME|SVpad_OUR)) | |
800 | return DEFSV; | |
801 | ||
802 | return PAD_SVl(po); | |
803 | } | |
804 | ||
805 | /* | |
dd2155a4 DM |
806 | =for apidoc pad_findlex |
807 | ||
808 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
809 | in the inner pads if it's found in an outer one. |
810 | ||
811 | Returns the offset in the bottom pad of the lex or the fake lex. | |
812 | cv is the CV in which to start the search, and seq is the current cop_seq | |
813 | to match against. If warn is true, print appropriate warnings. The out_* | |
814 | vars return values, and so are pointers to where the returned values | |
815 | should be stored. out_capture, if non-null, requests that the innermost | |
816 | instance of the lexical is captured; out_name_sv is set to the innermost | |
817 | matched namesv or fake namesv; out_flags returns the flags normally | |
818 | associated with the IVX field of a fake namesv. | |
819 | ||
820 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
821 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 822 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 823 | the parent pad. |
dd2155a4 DM |
824 | |
825 | =cut | |
826 | */ | |
827 | ||
b5c19bd7 DM |
828 | /* the CV has finished being compiled. This is not a sufficient test for |
829 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
830 | #define CvCOMPILED(cv) CvROOT(cv) | |
831 | ||
71f882da DM |
832 | /* the CV does late binding of its lexicals */ |
833 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
834 | ||
b5c19bd7 | 835 | |
dd2155a4 | 836 | STATIC PADOFFSET |
e1ec3a88 | 837 | S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn, |
b5c19bd7 | 838 | SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 839 | { |
97aff369 | 840 | dVAR; |
b5c19bd7 DM |
841 | I32 offset, new_offset; |
842 | SV *new_capture; | |
843 | SV **new_capturep; | |
b64e5050 | 844 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 845 | |
7918f24d NC |
846 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
847 | ||
b5c19bd7 | 848 | *out_flags = 0; |
a3985cdc | 849 | |
b5c19bd7 DM |
850 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
851 | "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n", | |
852 | PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" )); | |
dd2155a4 | 853 | |
b5c19bd7 | 854 | /* first, search this pad */ |
dd2155a4 | 855 | |
b5c19bd7 DM |
856 | if (padlist) { /* not an undef CV */ |
857 | I32 fake_offset = 0; | |
502c6561 | 858 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 859 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 860 | |
b5c19bd7 | 861 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 862 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 863 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 864 | && strEQ(SvPVX_const(namesv), name)) |
b5c19bd7 | 865 | { |
6012dc80 | 866 | if (SvFAKE(namesv)) { |
b5c19bd7 | 867 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
868 | continue; |
869 | } | |
870 | /* is seq within the range _LOW to _HIGH ? | |
871 | * This is complicated by the fact that PL_cop_seqmax | |
872 | * may have wrapped around at some point */ | |
873 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
874 | continue; /* not yet introduced */ | |
875 | ||
876 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
877 | /* in compiling scope */ | |
878 | if ( | |
879 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
880 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
881 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
882 | ) | |
883 | break; | |
884 | } | |
885 | else if ( | |
886 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
887 | ? | |
888 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
889 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
890 | ||
891 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
892 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
893 | ) | |
894 | break; | |
ee6cee0c DM |
895 | } |
896 | } | |
897 | ||
b5c19bd7 DM |
898 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
899 | if (offset > 0) { /* not fake */ | |
900 | fake_offset = 0; | |
901 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
902 | ||
903 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
904 | * instances. For now, we just test !CvUNIQUE(cv), but | |
905 | * ideally, we should detect my's declared within loops | |
906 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 907 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
908 | * lexes as not multi as viewed from evals. */ |
909 | ||
910 | *out_flags = CvANON(cv) ? | |
911 | PAD_FAKELEX_ANON : | |
912 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
913 | ? PAD_FAKELEX_MULTI : 0; | |
914 | ||
915 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
916 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
917 | PTR2UV(cv), (long)offset, | |
918 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
919 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
920 | } |
921 | else { /* fake match */ | |
922 | offset = fake_offset; | |
923 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 924 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 925 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 926 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 927 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 928 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
929 | )); |
930 | } | |
dd2155a4 | 931 | |
b5c19bd7 | 932 | /* return the lex? */ |
dd2155a4 | 933 | |
b5c19bd7 | 934 | if (out_capture) { |
dd2155a4 | 935 | |
b5c19bd7 | 936 | /* our ? */ |
00b1698f | 937 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 938 | *out_capture = NULL; |
b5c19bd7 DM |
939 | return offset; |
940 | } | |
ee6cee0c | 941 | |
b5c19bd7 DM |
942 | /* trying to capture from an anon prototype? */ |
943 | if (CvCOMPILED(cv) | |
944 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
945 | : *out_flags & PAD_FAKELEX_ANON) | |
946 | { | |
a2a5de95 NC |
947 | if (warn) |
948 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
949 | "Variable \"%s\" is not available", name); | |
a0714e2c | 950 | *out_capture = NULL; |
b5c19bd7 | 951 | } |
ee6cee0c | 952 | |
b5c19bd7 DM |
953 | /* real value */ |
954 | else { | |
955 | int newwarn = warn; | |
956 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 957 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
958 | && warn && ckWARN(WARN_CLOSURE)) { |
959 | newwarn = 0; | |
960 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
961 | "Variable \"%s\" will not stay shared", name); | |
962 | } | |
dd2155a4 | 963 | |
b5c19bd7 DM |
964 | if (fake_offset && CvANON(cv) |
965 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
966 | { | |
967 | SV *n; | |
968 | /* not yet caught - look further up */ | |
969 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
970 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
971 | PTR2UV(cv))); | |
972 | n = *out_name_sv; | |
282e1742 DM |
973 | (void) pad_findlex(name, CvOUTSIDE(cv), |
974 | CvOUTSIDE_SEQ(cv), | |
b5c19bd7 DM |
975 | newwarn, out_capture, out_name_sv, out_flags); |
976 | *out_name_sv = n; | |
977 | return offset; | |
dd2155a4 | 978 | } |
b5c19bd7 | 979 | |
502c6561 NC |
980 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
981 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
982 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
983 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 984 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 985 | |
d1186544 DM |
986 | if (SvPADSTALE(*out_capture) |
987 | && !SvPAD_STATE(name_svp[offset])) | |
988 | { | |
a2a5de95 NC |
989 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
990 | "Variable \"%s\" is not available", name); | |
a0714e2c | 991 | *out_capture = NULL; |
dd2155a4 DM |
992 | } |
993 | } | |
b5c19bd7 DM |
994 | if (!*out_capture) { |
995 | if (*name == '@') | |
ad64d0ec | 996 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
b5c19bd7 | 997 | else if (*name == '%') |
ad64d0ec | 998 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
999 | else |
1000 | *out_capture = sv_newmortal(); | |
1001 | } | |
dd2155a4 | 1002 | } |
b5c19bd7 DM |
1003 | |
1004 | return offset; | |
ee6cee0c | 1005 | } |
b5c19bd7 DM |
1006 | } |
1007 | ||
1008 | /* it's not in this pad - try above */ | |
1009 | ||
1010 | if (!CvOUTSIDE(cv)) | |
1011 | return NOT_IN_PAD; | |
9f7d9405 | 1012 | |
b5c19bd7 | 1013 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1014 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1015 | new_capturep = out_capture ? out_capture : |
4608196e | 1016 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 DM |
1017 | |
1018 | offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
1019 | new_capturep, out_name_sv, out_flags); | |
9f7d9405 | 1020 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1021 | return NOT_IN_PAD; |
9f7d9405 | 1022 | |
b5c19bd7 DM |
1023 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1024 | ||
1025 | /* don't add new fake entries (via eval) to CVs that we have already | |
1026 | * finished compiling, or to undef CVs */ | |
1027 | if (CvCOMPILED(cv) || !padlist) | |
1028 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1029 | ||
1030 | { | |
3291825f | 1031 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1032 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1033 | "good" and only copying flag bits and pointers that it understands. |
1034 | */ | |
1035 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1036 | AV * const ocomppad_name = PL_comppad_name; |
1037 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
1038 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1039 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
1040 | PL_curpad = AvARRAY(PL_comppad); |
1041 | ||
3291825f NC |
1042 | new_offset |
1043 | = pad_add_name_sv(new_namesv, | |
59cfed7d | 1044 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1045 | SvPAD_TYPED(*out_name_sv) |
1046 | ? SvSTASH(*out_name_sv) : NULL, | |
1047 | SvOURSTASH(*out_name_sv) | |
1048 | ); | |
1049 | ||
1050 | SvFAKE_on(new_namesv); | |
1051 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1052 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1053 | (long)new_offset, | |
1054 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1055 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1056 | |
809abb02 | 1057 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1058 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1059 | NOOP; /* do nothing */ |
b5c19bd7 | 1060 | } |
71f882da | 1061 | else if (CvLATE(cv)) { |
b5c19bd7 | 1062 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1063 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1064 | CvCLONE_on(cv); |
1065 | } | |
1066 | else { | |
1067 | /* immediate creation - capture outer value right now */ | |
1068 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
1069 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1070 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1071 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1072 | } |
b5c19bd7 | 1073 | *out_name_sv = new_namesv; |
809abb02 | 1074 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1075 | |
1076 | PL_comppad_name = ocomppad_name; | |
1077 | PL_comppad = ocomppad; | |
4608196e | 1078 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1079 | } |
b5c19bd7 | 1080 | return new_offset; |
dd2155a4 DM |
1081 | } |
1082 | ||
fb8a9836 AL |
1083 | |
1084 | #ifdef DEBUGGING | |
dd2155a4 DM |
1085 | /* |
1086 | =for apidoc pad_sv | |
1087 | ||
1088 | Get the value at offset po in the current pad. | |
1089 | Use macro PAD_SV instead of calling this function directly. | |
1090 | ||
1091 | =cut | |
1092 | */ | |
1093 | ||
1094 | ||
1095 | SV * | |
1096 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1097 | { | |
97aff369 | 1098 | dVAR; |
f3548bdc | 1099 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1100 | |
dd2155a4 DM |
1101 | if (!po) |
1102 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1103 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1104 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1105 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1106 | ); |
1107 | return PL_curpad[po]; | |
1108 | } | |
1109 | ||
1110 | ||
1111 | /* | |
1112 | =for apidoc pad_setsv | |
1113 | ||
1114 | Set the entry at offset po in the current pad to sv. | |
1115 | Use the macro PAD_SETSV() rather than calling this function directly. | |
1116 | ||
1117 | =cut | |
1118 | */ | |
1119 | ||
dd2155a4 DM |
1120 | void |
1121 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1122 | { | |
97aff369 | 1123 | dVAR; |
7918f24d NC |
1124 | |
1125 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1126 | ||
f3548bdc | 1127 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1128 | |
1129 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1130 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1131 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1132 | ); |
1133 | PL_curpad[po] = sv; | |
1134 | } | |
1135 | #endif | |
1136 | ||
1137 | ||
1138 | ||
1139 | /* | |
1140 | =for apidoc pad_block_start | |
1141 | ||
1142 | Update the pad compilation state variables on entry to a new block | |
1143 | ||
1144 | =cut | |
1145 | */ | |
1146 | ||
1147 | /* XXX DAPM perhaps: | |
1148 | * - integrate this in general state-saving routine ??? | |
1149 | * - combine with the state-saving going on in pad_new ??? | |
1150 | * - introduce a new SAVE type that does all this in one go ? | |
1151 | */ | |
1152 | ||
1153 | void | |
1154 | Perl_pad_block_start(pTHX_ int full) | |
1155 | { | |
97aff369 | 1156 | dVAR; |
f3548bdc | 1157 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1158 | SAVEI32(PL_comppad_name_floor); |
1159 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1160 | if (full) | |
1161 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1162 | if (PL_comppad_name_floor < 0) | |
1163 | PL_comppad_name_floor = 0; | |
1164 | SAVEI32(PL_min_intro_pending); | |
1165 | SAVEI32(PL_max_intro_pending); | |
1166 | PL_min_intro_pending = 0; | |
1167 | SAVEI32(PL_comppad_name_fill); | |
1168 | SAVEI32(PL_padix_floor); | |
1169 | PL_padix_floor = PL_padix; | |
1170 | PL_pad_reset_pending = FALSE; | |
1171 | } | |
1172 | ||
1173 | ||
1174 | /* | |
1175 | =for apidoc intro_my | |
1176 | ||
1177 | "Introduce" my variables to visible status. | |
1178 | ||
1179 | =cut | |
1180 | */ | |
1181 | ||
1182 | U32 | |
1183 | Perl_intro_my(pTHX) | |
1184 | { | |
97aff369 | 1185 | dVAR; |
dd2155a4 | 1186 | SV **svp; |
dd2155a4 | 1187 | I32 i; |
6012dc80 | 1188 | U32 seq; |
dd2155a4 | 1189 | |
f3548bdc | 1190 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1191 | if (! PL_min_intro_pending) |
1192 | return PL_cop_seqmax; | |
1193 | ||
1194 | svp = AvARRAY(PL_comppad_name); | |
1195 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1196 | SV * const sv = svp[i]; |
1197 | ||
0d311cdb DM |
1198 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1199 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1200 | { | |
2df5bdd7 | 1201 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1202 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1203 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1204 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1205 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1206 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1207 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1208 | ); |
1209 | } | |
1210 | } | |
6012dc80 DM |
1211 | seq = PL_cop_seqmax; |
1212 | PL_cop_seqmax++; | |
1213 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1214 | PL_cop_seqmax++; | |
dd2155a4 DM |
1215 | PL_min_intro_pending = 0; |
1216 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1217 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1218 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1219 | |
6012dc80 | 1220 | return seq; |
dd2155a4 DM |
1221 | } |
1222 | ||
1223 | /* | |
1224 | =for apidoc pad_leavemy | |
1225 | ||
1226 | Cleanup at end of scope during compilation: set the max seq number for | |
1227 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1228 | ||
1229 | =cut | |
1230 | */ | |
1231 | ||
1232 | void | |
1233 | Perl_pad_leavemy(pTHX) | |
1234 | { | |
97aff369 | 1235 | dVAR; |
dd2155a4 | 1236 | I32 off; |
551405c4 | 1237 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1238 | |
1239 | PL_pad_reset_pending = FALSE; | |
1240 | ||
f3548bdc | 1241 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1242 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1243 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1244 | const SV * const sv = svp[off]; |
9b387841 NC |
1245 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1246 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1247 | "%"SVf" never introduced", | |
1248 | SVfARG(sv)); | |
dd2155a4 DM |
1249 | } |
1250 | } | |
1251 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1252 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1253 | const SV * const sv = svp[off]; |
2df5bdd7 DM |
1254 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1255 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1256 | { | |
809abb02 | 1257 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1258 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1259 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1260 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1261 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1262 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1263 | ); |
1264 | } | |
1265 | } | |
1266 | PL_cop_seqmax++; | |
6012dc80 DM |
1267 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1268 | PL_cop_seqmax++; | |
dd2155a4 DM |
1269 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1270 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1271 | } | |
1272 | ||
1273 | ||
1274 | /* | |
1275 | =for apidoc pad_swipe | |
1276 | ||
1277 | Abandon the tmp in the current pad at offset po and replace with a | |
1278 | new one. | |
1279 | ||
1280 | =cut | |
1281 | */ | |
1282 | ||
1283 | void | |
1284 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1285 | { | |
97aff369 | 1286 | dVAR; |
f3548bdc | 1287 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1288 | if (!PL_curpad) |
1289 | return; | |
1290 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1291 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1292 | if (!po) | |
1293 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1294 | ||
1295 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1296 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1297 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1298 | ||
1299 | if (PL_curpad[po]) | |
1300 | SvPADTMP_off(PL_curpad[po]); | |
1301 | if (refadjust) | |
1302 | SvREFCNT_dec(PL_curpad[po]); | |
1303 | ||
9ad9869c DM |
1304 | |
1305 | /* if pad tmps aren't shared between ops, then there's no need to | |
1306 | * create a new tmp when an existing op is freed */ | |
1307 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1308 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1309 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1310 | #else |
1311 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1312 | #endif |
dd2155a4 DM |
1313 | if ((I32)po < PL_padix) |
1314 | PL_padix = po - 1; | |
1315 | } | |
1316 | ||
1317 | ||
1318 | /* | |
1319 | =for apidoc pad_reset | |
1320 | ||
1321 | Mark all the current temporaries for reuse | |
1322 | ||
1323 | =cut | |
1324 | */ | |
1325 | ||
1326 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1327 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1328 | * on the stack by OPs that use them, there are several ways to get an alias | |
1329 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1330 | * We avoid doing this until we can think of a Better Way. | |
1331 | * GSAR 97-10-29 */ | |
1f676739 | 1332 | static void |
82af08ae | 1333 | S_pad_reset(pTHX) |
dd2155a4 | 1334 | { |
97aff369 | 1335 | dVAR; |
dd2155a4 | 1336 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 DM |
1337 | if (AvARRAY(PL_comppad) != PL_curpad) |
1338 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1339 | ||
1340 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1341 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1342 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1343 | (long)PL_padix, (long)PL_padix_floor | |
1344 | ) | |
1345 | ); | |
1346 | ||
1347 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1348 | register I32 po; |
dd2155a4 DM |
1349 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1350 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1351 | SvPADTMP_off(PL_curpad[po]); | |
1352 | } | |
1353 | PL_padix = PL_padix_floor; | |
1354 | } | |
1355 | #endif | |
1356 | PL_pad_reset_pending = FALSE; | |
1357 | } | |
1358 | ||
1359 | ||
1360 | /* | |
1361 | =for apidoc pad_tidy | |
1362 | ||
1363 | Tidy up a pad after we've finished compiling it: | |
1364 | * remove most stuff from the pads of anonsub prototypes; | |
1365 | * give it a @_; | |
1366 | * mark tmps as such. | |
1367 | ||
1368 | =cut | |
1369 | */ | |
1370 | ||
1371 | /* XXX DAPM surely most of this stuff should be done properly | |
1372 | * at the right time beforehand, rather than going around afterwards | |
1373 | * cleaning up our mistakes ??? | |
1374 | */ | |
1375 | ||
1376 | void | |
1377 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1378 | { | |
27da23d5 | 1379 | dVAR; |
dd2155a4 | 1380 | |
f3548bdc | 1381 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1382 | |
1383 | /* If this CV has had any 'eval-capable' ops planted in it | |
1384 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1385 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1386 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1387 | * the right CvOUTSIDE. | |
1388 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1389 | * executed within it. |
b5c19bd7 DM |
1390 | */ |
1391 | ||
1392 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1393 | const CV *cv; |
b5c19bd7 DM |
1394 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1395 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1396 | break; /* no need to mark already-compiled code */ | |
1397 | if (CvANON(cv)) { | |
1398 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1399 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1400 | CvCLONE_on(cv); | |
1401 | } | |
1402 | } | |
1403 | } | |
1404 | ||
dd2155a4 DM |
1405 | /* extend curpad to match namepad */ |
1406 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1407 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1408 | |
1409 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1410 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1411 | PADOFFSET ix; |
b5c19bd7 | 1412 | |
dd2155a4 DM |
1413 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1414 | SV *namesv; | |
1415 | ||
1416 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1417 | continue; | |
1418 | /* | |
1419 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1420 | * pad are anonymous subs. |
dd2155a4 DM |
1421 | * The rest are created anew during cloning. |
1422 | */ | |
a0714e2c | 1423 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1424 | namesv != &PL_sv_undef && |
b15aece3 | 1425 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1426 | { |
1427 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1428 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1429 | } |
1430 | } | |
1431 | } | |
1432 | else if (type == padtidy_SUB) { | |
1433 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1434 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1435 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1436 | AvREIFY_only(av); |
dd2155a4 DM |
1437 | } |
1438 | ||
4cee4ca8 | 1439 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1440 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1441 | PADOFFSET ix; |
dd2155a4 DM |
1442 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1443 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1444 | continue; | |
adf8f095 | 1445 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1446 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1447 | } else if (!SvFAKE(namep[ix])) { |
1448 | /* This is a work around for how the current implementation of | |
1449 | ?{ } blocks in regexps interacts with lexicals. | |
1450 | ||
1451 | One of our lexicals. | |
1452 | Can't do this on all lexicals, otherwise sub baz() won't | |
1453 | compile in | |
1454 | ||
1455 | my $foo; | |
1456 | ||
1457 | sub bar { ++$foo; } | |
1458 | ||
1459 | sub baz { ++$foo; } | |
1460 | ||
1461 | because completion of compiling &bar calling pad_tidy() | |
1462 | would cause (top level) $foo to be marked as stale, and | |
1463 | "no longer available". */ | |
1464 | SvPADSTALE_on(PL_curpad[ix]); | |
1465 | } | |
dd2155a4 DM |
1466 | } |
1467 | } | |
f3548bdc | 1468 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1469 | } |
1470 | ||
1471 | ||
1472 | /* | |
1473 | =for apidoc pad_free | |
1474 | ||
8627550a | 1475 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1476 | |
1477 | =cut | |
1478 | */ | |
1479 | ||
1480 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1481 | void | |
1482 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1483 | { | |
97aff369 | 1484 | dVAR; |
f3548bdc | 1485 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1486 | if (!PL_curpad) |
1487 | return; | |
1488 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1489 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1490 | if (!po) | |
1491 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1492 | ||
1493 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1494 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1495 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1496 | ); | |
1497 | ||
1498 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1499 | SvPADTMP_off(PL_curpad[po]); | |
dd2155a4 DM |
1500 | } |
1501 | if ((I32)po < PL_padix) | |
1502 | PL_padix = po - 1; | |
1503 | } | |
1504 | ||
1505 | ||
1506 | ||
1507 | /* | |
1508 | =for apidoc do_dump_pad | |
1509 | ||
1510 | Dump the contents of a padlist | |
1511 | ||
1512 | =cut | |
1513 | */ | |
1514 | ||
1515 | void | |
1516 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1517 | { | |
97aff369 | 1518 | dVAR; |
e1ec3a88 AL |
1519 | const AV *pad_name; |
1520 | const AV *pad; | |
dd2155a4 DM |
1521 | SV **pname; |
1522 | SV **ppad; | |
dd2155a4 DM |
1523 | I32 ix; |
1524 | ||
7918f24d NC |
1525 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1526 | ||
dd2155a4 DM |
1527 | if (!padlist) { |
1528 | return; | |
1529 | } | |
502c6561 NC |
1530 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1531 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1532 | pname = AvARRAY(pad_name); |
1533 | ppad = AvARRAY(pad); | |
1534 | Perl_dump_indent(aTHX_ level, file, | |
1535 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1536 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1537 | ); | |
1538 | ||
1539 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1540 | const SV *namesv = pname[ix]; |
dd2155a4 | 1541 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1542 | namesv = NULL; |
dd2155a4 DM |
1543 | } |
1544 | if (namesv) { | |
ee6cee0c DM |
1545 | if (SvFAKE(namesv)) |
1546 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1547 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1548 | (int) ix, |
1549 | PTR2UV(ppad[ix]), | |
1550 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1551 | SvPVX_const(namesv), |
809abb02 NC |
1552 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1553 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1554 | |
ee6cee0c DM |
1555 | ); |
1556 | else | |
1557 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1558 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1559 | (int) ix, |
1560 | PTR2UV(ppad[ix]), | |
1561 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1562 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1563 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1564 | SvPVX_const(namesv) |
ee6cee0c | 1565 | ); |
dd2155a4 DM |
1566 | } |
1567 | else if (full) { | |
1568 | Perl_dump_indent(aTHX_ level+1, file, | |
1569 | "%2d. 0x%"UVxf"<%lu>\n", | |
1570 | (int) ix, | |
1571 | PTR2UV(ppad[ix]), | |
1572 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1573 | ); | |
1574 | } | |
1575 | } | |
1576 | } | |
1577 | ||
1578 | ||
1579 | ||
1580 | /* | |
1581 | =for apidoc cv_dump | |
1582 | ||
1583 | dump the contents of a CV | |
1584 | ||
1585 | =cut | |
1586 | */ | |
1587 | ||
1588 | #ifdef DEBUGGING | |
1589 | STATIC void | |
e1ec3a88 | 1590 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1591 | { |
97aff369 | 1592 | dVAR; |
53c1dcc0 AL |
1593 | const CV * const outside = CvOUTSIDE(cv); |
1594 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1595 | |
7918f24d NC |
1596 | PERL_ARGS_ASSERT_CV_DUMP; |
1597 | ||
dd2155a4 DM |
1598 | PerlIO_printf(Perl_debug_log, |
1599 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1600 | title, | |
1601 | PTR2UV(cv), | |
1602 | (CvANON(cv) ? "ANON" | |
71f882da | 1603 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1604 | : (cv == PL_main_cv) ? "MAIN" |
1605 | : CvUNIQUE(cv) ? "UNIQUE" | |
1606 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1607 | PTR2UV(outside), | |
1608 | (!outside ? "null" | |
1609 | : CvANON(outside) ? "ANON" | |
1610 | : (outside == PL_main_cv) ? "MAIN" | |
1611 | : CvUNIQUE(outside) ? "UNIQUE" | |
1612 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1613 | ||
1614 | PerlIO_printf(Perl_debug_log, | |
1615 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1616 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1617 | } | |
1618 | #endif /* DEBUGGING */ | |
1619 | ||
1620 | ||
1621 | ||
1622 | ||
1623 | ||
1624 | /* | |
1625 | =for apidoc cv_clone | |
1626 | ||
1627 | Clone a CV: make a new CV which points to the same code etc, but which | |
1628 | has a newly-created pad built by copying the prototype pad and capturing | |
1629 | any outer lexicals. | |
1630 | ||
1631 | =cut | |
1632 | */ | |
1633 | ||
1634 | CV * | |
1635 | Perl_cv_clone(pTHX_ CV *proto) | |
1636 | { | |
27da23d5 | 1637 | dVAR; |
dd2155a4 | 1638 | I32 ix; |
53c1dcc0 | 1639 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1640 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1641 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1642 | SV** const pname = AvARRAY(protopad_name); |
1643 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1644 | const I32 fname = AvFILLp(protopad_name); |
1645 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1646 | CV* cv; |
b5c19bd7 DM |
1647 | SV** outpad; |
1648 | CV* outside; | |
71f882da | 1649 | long depth; |
dd2155a4 | 1650 | |
7918f24d NC |
1651 | PERL_ARGS_ASSERT_CV_CLONE; |
1652 | ||
dd2155a4 DM |
1653 | assert(!CvUNIQUE(proto)); |
1654 | ||
71f882da DM |
1655 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1656 | * to a prototype; we instead want the cloned parent who called us. | |
1657 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1658 | ||
1659 | outside = CvOUTSIDE(proto); | |
1660 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1661 | outside = find_runcv(NULL); | |
1662 | depth = CvDEPTH(outside); | |
1663 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1664 | if (!depth) | |
1665 | depth = 1; | |
b5c19bd7 DM |
1666 | assert(CvPADLIST(outside)); |
1667 | ||
dd2155a4 DM |
1668 | ENTER; |
1669 | SAVESPTR(PL_compcv); | |
1670 | ||
ea726b52 | 1671 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
c794ca97 | 1672 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC); |
dd2155a4 DM |
1673 | CvCLONED_on(cv); |
1674 | ||
dd2155a4 | 1675 | #ifdef USE_ITHREADS |
aed2304a NC |
1676 | CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto) |
1677 | : savepv(CvFILE(proto)); | |
dd2155a4 DM |
1678 | #else |
1679 | CvFILE(cv) = CvFILE(proto); | |
1680 | #endif | |
b3f91e91 | 1681 | CvGV_set(cv,CvGV(proto)); |
c68d9564 | 1682 | CvSTASH_set(cv, CvSTASH(proto)); |
b34c0dd4 | 1683 | OP_REFCNT_LOCK; |
dd2155a4 | 1684 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1685 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1686 | CvSTART(cv) = CvSTART(proto); |
ea726b52 | 1687 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
b5c19bd7 | 1688 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1689 | |
1690 | if (SvPOK(proto)) | |
ad64d0ec | 1691 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 | 1692 | |
b7787f18 | 1693 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1694 | |
b5c19bd7 | 1695 | av_fill(PL_comppad, fpad); |
7aaef02a | 1696 | for (ix = fname; ix > 0; ix--) |
dd2155a4 DM |
1697 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
1698 | ||
dd2155a4 DM |
1699 | PL_curpad = AvARRAY(PL_comppad); |
1700 | ||
71f882da | 1701 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1702 | |
dd2155a4 | 1703 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1704 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1705 | SV *sv = NULL; | |
71f882da | 1706 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1707 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 | 1708 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da | 1709 | assert(sv); |
33894c1a DM |
1710 | /* formats may have an inactive parent, |
1711 | while my $x if $false can leave an active var marked as | |
d1186544 DM |
1712 | stale. And state vars are always available */ |
1713 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { | |
a2a5de95 NC |
1714 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
1715 | "Variable \"%s\" is not available", SvPVX_const(namesv)); | |
a0714e2c | 1716 | sv = NULL; |
71f882da | 1717 | } |
33894c1a | 1718 | else |
f84c484e | 1719 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1720 | } |
71f882da | 1721 | if (!sv) { |
b15aece3 | 1722 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 1723 | if (sigil == '&') |
dd2155a4 | 1724 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 1725 | else if (sigil == '@') |
ad64d0ec | 1726 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 1727 | else if (sigil == '%') |
ad64d0ec | 1728 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1729 | else |
561b68a9 | 1730 | sv = newSV(0); |
235cc2e3 | 1731 | SvPADMY_on(sv); |
0d3b281c DM |
1732 | /* reset the 'assign only once' flag on each state var */ |
1733 | if (SvPAD_STATE(namesv)) | |
1734 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
1735 | } |
1736 | } | |
1737 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 1738 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
1739 | } |
1740 | else { | |
561b68a9 | 1741 | sv = newSV(0); |
dd2155a4 | 1742 | SvPADTMP_on(sv); |
dd2155a4 | 1743 | } |
71f882da | 1744 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1745 | } |
1746 | ||
dd2155a4 DM |
1747 | DEBUG_Xv( |
1748 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1749 | cv_dump(outside, "Outside"); | |
1750 | cv_dump(proto, "Proto"); | |
1751 | cv_dump(cv, "To"); | |
1752 | ); | |
1753 | ||
1754 | LEAVE; | |
1755 | ||
1756 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1757 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1758 | * The prototype was marked as a candiate for const-ization, | |
1759 | * so try to grab the current const value, and if successful, | |
1760 | * turn into a const sub: | |
1761 | */ | |
551405c4 | 1762 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1763 | if (const_sv) { |
1764 | SvREFCNT_dec(cv); | |
bd61b366 | 1765 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
1766 | } |
1767 | else { | |
1768 | CvCONST_off(cv); | |
1769 | } | |
dd2155a4 DM |
1770 | } |
1771 | ||
1772 | return cv; | |
1773 | } | |
1774 | ||
1775 | ||
1776 | /* | |
1777 | =for apidoc pad_fixup_inner_anons | |
1778 | ||
1779 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1780 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1781 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1782 | |
1783 | =cut | |
1784 | */ | |
1785 | ||
1786 | void | |
1787 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1788 | { | |
97aff369 | 1789 | dVAR; |
dd2155a4 | 1790 | I32 ix; |
502c6561 NC |
1791 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1792 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
1793 | SV ** const namepad = AvARRAY(comppad_name); |
1794 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
1795 | |
1796 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
1797 | PERL_UNUSED_ARG(old_cv); |
1798 | ||
dd2155a4 | 1799 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 1800 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 1801 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 1802 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 1803 | { |
ea726b52 | 1804 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
1805 | assert(CvWEAKOUTSIDE(innercv)); |
1806 | assert(CvOUTSIDE(innercv) == old_cv); | |
1807 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
1808 | } |
1809 | } | |
1810 | } | |
1811 | ||
7dafbf52 | 1812 | |
dd2155a4 DM |
1813 | /* |
1814 | =for apidoc pad_push | |
1815 | ||
1816 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
1817 | this depth, in which case don't bother creating a new one. Then give |
1818 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
1819 | |
1820 | =cut | |
1821 | */ | |
1822 | ||
1823 | void | |
26019298 | 1824 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 1825 | { |
97aff369 | 1826 | dVAR; |
7918f24d NC |
1827 | |
1828 | PERL_ARGS_ASSERT_PAD_PUSH; | |
1829 | ||
b37c2d43 | 1830 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
1831 | SV** const svp = AvARRAY(padlist); |
1832 | AV* const newpad = newAV(); | |
1833 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
1834 | I32 ix = AvFILLp((const AV *)svp[1]); |
1835 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 1836 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
1837 | AV *av; |
1838 | ||
dd2155a4 DM |
1839 | for ( ;ix > 0; ix--) { |
1840 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 1841 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
1842 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
1843 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
1844 | || sigil == '&') | |
1845 | { | |
dd2155a4 DM |
1846 | /* outer lexical or anon code */ |
1847 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
1848 | } | |
1849 | else { /* our own lexical */ | |
26019298 AL |
1850 | SV *sv; |
1851 | if (sigil == '@') | |
ad64d0ec | 1852 | sv = MUTABLE_SV(newAV()); |
26019298 | 1853 | else if (sigil == '%') |
ad64d0ec | 1854 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1855 | else |
561b68a9 | 1856 | sv = newSV(0); |
26019298 | 1857 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1858 | SvPADMY_on(sv); |
1859 | } | |
1860 | } | |
1861 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 1862 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
1863 | } |
1864 | else { | |
1865 | /* save temporaries on recursion? */ | |
561b68a9 | 1866 | SV * const sv = newSV(0); |
26019298 | 1867 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1868 | SvPADTMP_on(sv); |
1869 | } | |
1870 | } | |
26019298 | 1871 | av = newAV(); |
ad64d0ec | 1872 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1873 | AvREIFY_only(av); |
26019298 | 1874 | |
ad64d0ec | 1875 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
1876 | AvFILLp(padlist) = depth; |
1877 | } | |
1878 | } | |
b21dc031 AL |
1879 | |
1880 | ||
1881 | HV * | |
1882 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
1883 | { | |
97aff369 | 1884 | dVAR; |
551405c4 | 1885 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 1886 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
1887 | return SvSTASH(*av); |
1888 | } | |
5c284bb0 | 1889 | return NULL; |
b21dc031 | 1890 | } |
66610fdd | 1891 | |
d5b1589c NC |
1892 | #if defined(USE_ITHREADS) |
1893 | ||
1894 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
1895 | ||
1896 | AV * | |
1897 | Perl_padlist_dup(pTHX_ AV *const srcpad, CLONE_PARAMS *const param) | |
1898 | { | |
1899 | AV *dstpad; | |
1900 | PERL_ARGS_ASSERT_PADLIST_DUP; | |
1901 | ||
1902 | if (!srcpad) | |
1903 | return NULL; | |
1904 | ||
1905 | assert(!AvREAL(srcpad)); | |
6de654a5 NC |
1906 | |
1907 | if (param->flags & CLONEf_COPY_STACKS | |
1908 | || SvREFCNT(AvARRAY(srcpad)[1]) > 1) { | |
1909 | /* XXX padlists are real, but pretend to be not */ | |
1910 | AvREAL_on(srcpad); | |
1911 | dstpad = av_dup_inc(srcpad, param); | |
1912 | AvREAL_off(srcpad); | |
1913 | AvREAL_off(dstpad); | |
1914 | assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1); | |
1915 | } else { | |
1916 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
1917 | to build anything other than the first level of pads. */ | |
1918 | ||
1919 | I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]); | |
1920 | AV *pad1; | |
05d04d9c | 1921 | const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0])); |
6de654a5 NC |
1922 | const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1]; |
1923 | SV **oldpad = AvARRAY(srcpad1); | |
1924 | SV **names; | |
1925 | SV **pad1a; | |
1926 | AV *args; | |
1927 | /* look for it in the table first. | |
1928 | I *think* that it shouldn't be possible to find it there. | |
1929 | Well, except for how Perl_sv_compile_2op() "works" :-( */ | |
1930 | dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad); | |
1931 | ||
1932 | if (dstpad) | |
1933 | return dstpad; | |
1934 | ||
1935 | dstpad = newAV(); | |
1936 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
1937 | AvREAL_off(dstpad); | |
1938 | av_extend(dstpad, 1); | |
1939 | AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param)); | |
1940 | names = AvARRAY(AvARRAY(dstpad)[0]); | |
1941 | ||
1942 | pad1 = newAV(); | |
1943 | ||
1944 | av_extend(pad1, ix); | |
1945 | AvARRAY(dstpad)[1] = MUTABLE_SV(pad1); | |
1946 | pad1a = AvARRAY(pad1); | |
1947 | AvFILLp(dstpad) = 1; | |
1948 | ||
1949 | if (ix > -1) { | |
1950 | AvFILLp(pad1) = ix; | |
1951 | ||
1952 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
1953 | if (!oldpad[ix]) { |
1954 | pad1a[ix] = NULL; | |
1955 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
1956 | const char sigil = SvPVX_const(names[ix])[0]; | |
1957 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
1958 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
1959 | || sigil == '&') | |
1960 | { | |
1961 | /* outer lexical or anon code */ | |
1962 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
1963 | } | |
1964 | else { /* our own lexical */ | |
adf8f095 NC |
1965 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
1966 | /* This is a work around for how the current | |
1967 | implementation of ?{ } blocks in regexps | |
1968 | interacts with lexicals. */ | |
05d04d9c NC |
1969 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
1970 | } else { | |
1971 | SV *sv; | |
1972 | ||
1973 | if (sigil == '@') | |
1974 | sv = MUTABLE_SV(newAV()); | |
1975 | else if (sigil == '%') | |
1976 | sv = MUTABLE_SV(newHV()); | |
1977 | else | |
1978 | sv = newSV(0); | |
1979 | pad1a[ix] = sv; | |
1980 | SvPADMY_on(sv); | |
1981 | } | |
1982 | } | |
1983 | } | |
1984 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
1985 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
1986 | } | |
1987 | else { | |
1988 | /* save temporaries on recursion? */ | |
1989 | SV * const sv = newSV(0); | |
1990 | pad1a[ix] = sv; | |
1991 | ||
1992 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
1993 | FIXTHAT before merging this branch. | |
1994 | (And I know how to) */ | |
1995 | if (SvPADMY(oldpad[ix])) | |
1996 | SvPADMY_on(sv); | |
1997 | else | |
1998 | SvPADTMP_on(sv); | |
1999 | } | |
6de654a5 NC |
2000 | } |
2001 | ||
2002 | if (oldpad[0]) { | |
2003 | args = newAV(); /* Will be @_ */ | |
2004 | AvREIFY_only(args); | |
2005 | pad1a[0] = (SV *)args; | |
2006 | } | |
2007 | } | |
2008 | } | |
d5b1589c NC |
2009 | |
2010 | return dstpad; | |
2011 | } | |
2012 | ||
2013 | #endif | |
2014 | ||
66610fdd RGS |
2015 | /* |
2016 | * Local variables: | |
2017 | * c-indentation-style: bsd | |
2018 | * c-basic-offset: 4 | |
2019 | * indent-tabs-mode: t | |
2020 | * End: | |
2021 | * | |
37442d52 RGS |
2022 | * ex: set ts=8 sts=4 sw=4 noet: |
2023 | */ |