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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | * by Larry Wall and others | |
dd2155a4 DM |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
4ac71550 TC |
8 | */ |
9 | ||
10 | /* | |
11 | * 'Anyway: there was this Mr. Frodo left an orphan and stranded, as you | |
12 | * might say, among those queer Bucklanders, being brought up anyhow in | |
13 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
14 | * never had fewer than a couple of hundred relations in the place. | |
15 | * Mr. Bilbo never did a kinder deed than when he brought the lad back | |
16 | * to live among decent folk.' --the Gaffer | |
dd2155a4 | 17 | * |
4ac71550 | 18 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
dd2155a4 DM |
19 | */ |
20 | ||
21 | /* XXX DAPM | |
22 | * As of Sept 2002, this file is new and may be in a state of flux for | |
23 | * a while. I've marked things I intent to come back and look at further | |
24 | * with an 'XXX DAPM' comment. | |
25 | */ | |
26 | ||
27 | /* | |
28 | =head1 Pad Data Structures | |
29 | ||
cc76b5cc | 30 | =for apidoc Amx|PADLIST *|CvPADLIST|CV *cv |
166f8a29 | 31 | |
cc76b5cc Z |
32 | CV's can have CvPADLIST(cv) set to point to an AV. This is the CV's |
33 | scratchpad, which stores lexical variables and opcode temporary and | |
34 | per-thread values. | |
dd2155a4 DM |
35 | |
36 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
37 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
38 | executing). Require'd files are simply evals without any outer lexical |
39 | scope. | |
dd2155a4 DM |
40 | |
41 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
42 | but that is really the callers pad (a slot of which is allocated by | |
43 | every entersub). | |
44 | ||
7d953ba8 | 45 | The CvPADLIST AV has the REFCNT of its component items managed "manually" |
6e670818 | 46 | (mostly in pad.c) rather than by normal av.c rules. So we turn off AvREAL |
7d953ba8 | 47 | just before freeing it, to let av.c know not to touch the entries. |
dd2155a4 DM |
48 | The items in the AV are not SVs as for a normal AV, but other AVs: |
49 | ||
50 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
51 | the "static type information" for lexicals. | |
52 | ||
53 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
54 | depth of recursion into the CV. | |
55 | The 0'th slot of a frame AV is an AV which is @_. | |
56 | other entries are storage for variables and op targets. | |
57 | ||
f3548bdc | 58 | Iterating over the names AV iterates over all possible pad |
dd2155a4 DM |
59 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
60 | &PL_sv_undef "names" (see pad_alloc()). | |
61 | ||
62 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
63 | The rest are op targets/GVs/constants which are statically allocated | |
64 | or resolved at compile time. These don't have names by which they | |
65 | can be looked up from Perl code at run time through eval"" like | |
66 | my/our variables can be. Since they can't be looked up by "name" | |
67 | but only by their index allocated at compile time (which is usually | |
68 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
69 | ||
70 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 71 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
72 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
73 | _HIGH). During compilation, these fields may hold the special value | |
74 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
75 | |
76 | COP_SEQ_RANGE_LOW _HIGH | |
77 | ----------------- ----- | |
78 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
79 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
80 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
81 | ||
82 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 83 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 84 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 85 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 86 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 87 | |
b5c19bd7 DM |
88 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
89 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
3441fb63 NC |
90 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
91 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 92 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 93 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
94 | within the parent's pad where the lexical's value is stored, to make |
95 | cloning quicker. | |
dd2155a4 | 96 | |
a6d05634 | 97 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
98 | is a CV representing a possible closure. |
99 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
100 | become so if C<my sub foo {}> is implemented.) | |
101 | ||
71f882da DM |
102 | Note that formats are treated as anon subs, and are cloned each time |
103 | write is called (if necessary). | |
104 | ||
ab8e66c1 | 105 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
e6e7068b DM |
106 | and set on scope exit. This allows the 'Variable $x is not available' warning |
107 | to be generated in evals, such as | |
108 | ||
109 | { my $x = 1; sub f { eval '$x'} } f(); | |
110 | ||
ab8e66c1 | 111 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised' |
d1186544 | 112 | |
cc76b5cc Z |
113 | =for apidoc AmxU|AV *|PL_comppad_name |
114 | ||
115 | During compilation, this points to the array containing the names part | |
116 | of the pad for the currently-compiling code. | |
117 | ||
118 | =for apidoc AmxU|AV *|PL_comppad | |
119 | ||
120 | During compilation, this points to the array containing the values | |
121 | part of the pad for the currently-compiling code. (At runtime a CV may | |
122 | have many such value arrays; at compile time just one is constructed.) | |
123 | At runtime, this points to the array containing the currently-relevant | |
124 | values for the pad for the currently-executing code. | |
125 | ||
126 | =for apidoc AmxU|SV **|PL_curpad | |
127 | ||
128 | Points directly to the body of the L</PL_comppad> array. | |
129 | (I.e., this is C<AvARRAY(PL_comppad)>.) | |
130 | ||
dd2155a4 DM |
131 | =cut |
132 | */ | |
133 | ||
134 | ||
135 | #include "EXTERN.h" | |
136 | #define PERL_IN_PAD_C | |
137 | #include "perl.h" | |
952306ac | 138 | #include "keywords.h" |
dd2155a4 | 139 | |
3441fb63 NC |
140 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
141 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
142 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
143 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 144 | |
3441fb63 NC |
145 | #define PARENT_PAD_INDEX_set(sv,val) \ |
146 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
147 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
148 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 149 | |
cc76b5cc Z |
150 | /* |
151 | =for apidoc mx|void|pad_peg|const char *s | |
152 | ||
153 | When PERL_MAD is enabled, this is a small no-op function that gets called | |
154 | at the start of each pad-related function. It can be breakpointed to | |
155 | track all pad operations. The parameter is a string indicating the type | |
156 | of pad operation being performed. | |
157 | ||
158 | =cut | |
159 | */ | |
160 | ||
1dba731d NC |
161 | #ifdef PERL_MAD |
162 | void pad_peg(const char* s) { | |
790427a5 DM |
163 | static int pegcnt; /* XXX not threadsafe */ |
164 | PERL_UNUSED_ARG(s); | |
7918f24d NC |
165 | |
166 | PERL_ARGS_ASSERT_PAD_PEG; | |
167 | ||
1dba731d NC |
168 | pegcnt++; |
169 | } | |
170 | #endif | |
dd2155a4 DM |
171 | |
172 | /* | |
5b16296c BF |
173 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
174 | and bytes checking. | |
175 | */ | |
176 | ||
76d60a53 NC |
177 | static bool |
178 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
179 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
180 | const char *pv1 = SvPVX_const(sv); | |
181 | STRLEN cur1 = SvCUR(sv); | |
182 | const char *pv2 = pv; | |
183 | STRLEN cur2 = pvlen; | |
184 | if (PL_encoding) { | |
185 | SV* svrecode = NULL; | |
186 | if (SvUTF8(sv)) { | |
187 | svrecode = newSVpvn(pv2, cur2); | |
188 | sv_recode_to_utf8(svrecode, PL_encoding); | |
189 | pv2 = SvPV_const(svrecode, cur2); | |
190 | } | |
191 | else { | |
192 | svrecode = newSVpvn(pv1, cur1); | |
193 | sv_recode_to_utf8(svrecode, PL_encoding); | |
194 | pv1 = SvPV_const(svrecode, cur1); | |
195 | } | |
196 | SvREFCNT_dec(svrecode); | |
197 | } | |
198 | if (flags & SVf_UTF8) | |
199 | return (bytes_cmp_utf8( | |
200 | (const U8*)pv1, cur1, | |
201 | (const U8*)pv2, cur2) == 0); | |
202 | else | |
203 | return (bytes_cmp_utf8( | |
204 | (const U8*)pv2, cur2, | |
205 | (const U8*)pv1, cur1) == 0); | |
206 | } | |
207 | else | |
208 | return ((SvPVX_const(sv) == pv) | |
209 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
210 | } | |
211 | ||
212 | ||
213 | /* | |
cc76b5cc | 214 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 215 | |
cc76b5cc Z |
216 | Create a new padlist, updating the global variables for the |
217 | currently-compiling padlist to point to the new padlist. The following | |
218 | flags can be OR'ed together: | |
dd2155a4 DM |
219 | |
220 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 221 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
222 | padnew_SAVESUB also save extra stuff for start of sub |
223 | ||
224 | =cut | |
225 | */ | |
226 | ||
227 | PADLIST * | |
c7c737cb | 228 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 229 | { |
97aff369 | 230 | dVAR; |
e1ec3a88 | 231 | AV *padlist, *padname, *pad; |
7a6072a8 | 232 | SV **ary; |
dd2155a4 | 233 | |
f3548bdc DM |
234 | ASSERT_CURPAD_LEGAL("pad_new"); |
235 | ||
dd2155a4 DM |
236 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
237 | * vars (based on flags) rather than storing vals + addresses for | |
238 | * each individually. Also see pad_block_start. | |
239 | * XXX DAPM Try to see whether all these conditionals are required | |
240 | */ | |
241 | ||
242 | /* save existing state, ... */ | |
243 | ||
244 | if (flags & padnew_SAVE) { | |
3979c56f | 245 | SAVECOMPPAD(); |
dd2155a4 DM |
246 | SAVESPTR(PL_comppad_name); |
247 | if (! (flags & padnew_CLONE)) { | |
248 | SAVEI32(PL_padix); | |
249 | SAVEI32(PL_comppad_name_fill); | |
250 | SAVEI32(PL_min_intro_pending); | |
251 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 252 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 253 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 254 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
255 | } |
256 | } | |
257 | } | |
258 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
259 | * saved - check at some pt that this is okay */ | |
260 | ||
261 | /* ... create new pad ... */ | |
262 | ||
263 | padlist = newAV(); | |
264 | padname = newAV(); | |
265 | pad = newAV(); | |
266 | ||
267 | if (flags & padnew_CLONE) { | |
268 | /* XXX DAPM I dont know why cv_clone needs it | |
269 | * doing differently yet - perhaps this separate branch can be | |
270 | * dispensed with eventually ??? | |
271 | */ | |
272 | ||
e1ec3a88 | 273 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 274 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 275 | AvREIFY_only(a0); |
dd2155a4 DM |
276 | } |
277 | else { | |
a0714e2c | 278 | av_store(pad, 0, NULL); |
dd2155a4 DM |
279 | } |
280 | ||
7a6072a8 NC |
281 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
282 | array - names, and depth=1. The default for av_store() is to allocate | |
283 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
284 | up, so we inline the allocation of the array here. */ | |
285 | Newx(ary, 2, SV*); | |
286 | AvFILLp(padlist) = 1; | |
287 | AvMAX(padlist) = 1; | |
288 | AvALLOC(padlist) = ary; | |
289 | AvARRAY(padlist) = ary; | |
290 | ary[0] = MUTABLE_SV(padname); | |
291 | ary[1] = MUTABLE_SV(pad); | |
dd2155a4 DM |
292 | |
293 | /* ... then update state variables */ | |
294 | ||
403799bf NC |
295 | PL_comppad_name = padname; |
296 | PL_comppad = pad; | |
297 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
298 | |
299 | if (! (flags & padnew_CLONE)) { | |
300 | PL_comppad_name_fill = 0; | |
301 | PL_min_intro_pending = 0; | |
302 | PL_padix = 0; | |
b5c19bd7 | 303 | PL_cv_has_eval = 0; |
dd2155a4 DM |
304 | } |
305 | ||
306 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 307 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 308 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 309 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
310 | PTR2UV(padname), (UV)flags |
311 | ) | |
312 | ); | |
313 | ||
314 | return (PADLIST*)padlist; | |
315 | } | |
316 | ||
dd2155a4 | 317 | |
c4528262 NC |
318 | /* |
319 | =head1 Embedding Functions | |
320 | ||
321 | =for apidoc cv_undef | |
322 | ||
323 | Clear out all the active components of a CV. This can happen either | |
324 | by an explicit C<undef &foo>, or by the reference count going to zero. | |
325 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
326 | children can still follow the full lexical scope chain. | |
327 | ||
328 | =cut | |
329 | */ | |
330 | ||
331 | void | |
332 | Perl_cv_undef(pTHX_ CV *cv) | |
333 | { | |
334 | dVAR; | |
c2736fce | 335 | const PADLIST *padlist = CvPADLIST(cv); |
8be227ab | 336 | bool const slabbed = !!CvSLABBED(cv); |
c4528262 NC |
337 | |
338 | PERL_ARGS_ASSERT_CV_UNDEF; | |
339 | ||
340 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
341 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
342 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
343 | ); | |
344 | ||
bad4ae38 | 345 | if (CvFILE(cv) && CvDYNFILE(cv)) { |
c4528262 NC |
346 | Safefree(CvFILE(cv)); |
347 | } | |
348 | CvFILE(cv) = NULL; | |
dd2155a4 | 349 | |
8be227ab | 350 | CvSLABBED_off(cv); |
c4528262 NC |
351 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
352 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
353 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
354 | ENTER; | |
355 | ||
356 | PAD_SAVE_SETNULLPAD(); | |
357 | ||
8be227ab FC |
358 | #ifndef PL_OP_SLAB_ALLOC |
359 | if (slabbed) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(cv))); | |
360 | #endif | |
c4528262 NC |
361 | op_free(CvROOT(cv)); |
362 | CvROOT(cv) = NULL; | |
363 | CvSTART(cv) = NULL; | |
364 | LEAVE; | |
365 | } | |
8be227ab FC |
366 | #ifndef PL_OP_SLAB_ALLOC |
367 | else if (slabbed && CvSTART(cv)) { | |
368 | ENTER; | |
369 | PAD_SAVE_SETNULLPAD(); | |
370 | ||
371 | /* discard any leaked ops */ | |
372 | opslab_force_free((OPSLAB *)CvSTART(cv)); | |
373 | CvSTART(cv) = NULL; | |
374 | ||
375 | LEAVE; | |
376 | } | |
377 | # ifdef DEBUGGING | |
378 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv); | |
379 | # endif | |
380 | #endif | |
c4528262 NC |
381 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
382 | CvGV_set(cv, NULL); | |
383 | ||
c2736fce NC |
384 | /* This statement and the subsequence if block was pad_undef(). */ |
385 | pad_peg("pad_undef"); | |
386 | ||
387 | if (padlist && !SvIS_FREED(padlist) /* may be during global destruction */ | |
388 | ) { | |
389 | I32 ix; | |
390 | ||
391 | /* Free the padlist associated with a CV. | |
392 | If parts of it happen to be current, we null the relevant PL_*pad* | |
393 | global vars so that we don't have any dangling references left. | |
394 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
395 | subs to the outer of this cv. */ | |
396 | ||
397 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
398 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
399 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
400 | ); | |
401 | ||
402 | /* detach any '&' anon children in the pad; if afterwards they | |
403 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
404 | * bypassing us. */ | |
405 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
406 | * children, or integrate this loop with general cleanup */ | |
407 | ||
408 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
409 | CV * const outercv = CvOUTSIDE(cv); | |
410 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
411 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); | |
412 | SV ** const namepad = AvARRAY(comppad_name); | |
413 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
414 | SV ** const curpad = AvARRAY(comppad); | |
415 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
416 | SV * const namesv = namepad[ix]; | |
417 | if (namesv && namesv != &PL_sv_undef | |
418 | && *SvPVX_const(namesv) == '&') | |
419 | { | |
420 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
421 | U32 inner_rc = SvREFCNT(innercv); | |
422 | assert(inner_rc); | |
e09ac076 | 423 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
424 | namepad[ix] = NULL; |
425 | SvREFCNT_dec(namesv); | |
426 | ||
427 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
428 | curpad[ix] = NULL; | |
429 | SvREFCNT_dec(innercv); | |
430 | inner_rc--; | |
431 | } | |
432 | ||
433 | /* in use, not just a prototype */ | |
434 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
435 | assert(CvWEAKOUTSIDE(innercv)); | |
436 | /* don't relink to grandfather if he's being freed */ | |
437 | if (outercv && SvREFCNT(outercv)) { | |
438 | CvWEAKOUTSIDE_off(innercv); | |
439 | CvOUTSIDE(innercv) = outercv; | |
440 | CvOUTSIDE_SEQ(innercv) = seq; | |
441 | SvREFCNT_inc_simple_void_NN(outercv); | |
442 | } | |
443 | else { | |
444 | CvOUTSIDE(innercv) = NULL; | |
445 | } | |
446 | } | |
447 | } | |
448 | } | |
449 | } | |
450 | ||
451 | ix = AvFILLp(padlist); | |
aa2f79cf | 452 | while (ix > 0) { |
c2736fce NC |
453 | SV* const sv = AvARRAY(padlist)[ix--]; |
454 | if (sv) { | |
aa2f79cf | 455 | if (sv == (const SV *)PL_comppad) { |
c2736fce NC |
456 | PL_comppad = NULL; |
457 | PL_curpad = NULL; | |
458 | } | |
aa2f79cf | 459 | SvREFCNT_dec(sv); |
c2736fce | 460 | } |
aa2f79cf NC |
461 | } |
462 | { | |
463 | SV *const sv = AvARRAY(padlist)[0]; | |
464 | if (sv == (const SV *)PL_comppad_name) | |
465 | PL_comppad_name = NULL; | |
c2736fce NC |
466 | SvREFCNT_dec(sv); |
467 | } | |
7d953ba8 | 468 | AvREAL_off(CvPADLIST(cv)); |
c2736fce NC |
469 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); |
470 | CvPADLIST(cv) = NULL; | |
471 | } | |
472 | ||
c4528262 NC |
473 | |
474 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
475 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
476 | if (!CvWEAKOUTSIDE(cv)) | |
477 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
478 | CvOUTSIDE(cv) = NULL; | |
479 | } | |
480 | if (CvCONST(cv)) { | |
481 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
482 | CvCONST_off(cv); | |
483 | } | |
484 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
485 | CvXSUB(cv) = NULL; | |
486 | } | |
487 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
2c374370 FC |
488 | * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses |
489 | * to choose an error message */ | |
490 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON); | |
c4528262 | 491 | } |
dd2155a4 | 492 | |
8be227ab FC |
493 | #ifndef PL_OP_SLAB_ALLOC |
494 | void | |
495 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
496 | { | |
497 | const bool slabbed = !!CvSLABBED(cv); | |
498 | ||
499 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
500 | ||
501 | if (!slabbed) return; | |
502 | ||
503 | CvSLABBED_off(cv); | |
504 | ||
505 | if (CvROOT(cv)) OpslabREFCNT_dec(OpSLAB(CvROOT(cv))); | |
506 | else if (CvSTART(cv)) OpslabREFCNT_dec((OPSLAB *)CvSTART(cv)); | |
507 | # ifdef DEBUGGING | |
508 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv); | |
509 | # endif | |
510 | } | |
511 | #endif | |
512 | ||
cc76b5cc Z |
513 | /* |
514 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
515 | ||
1a115e49 FC |
516 | Allocates a place in the currently-compiling |
517 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
518 | then stores a name for that entry. I<namesv> is adopted and becomes the |
519 | name entry; it must already contain the name string and be sufficiently | |
520 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
521 | added to I<namesv>. None of the other |
522 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
523 | is done. Returns the offset of the allocated pad slot. |
524 | ||
525 | =cut | |
526 | */ | |
527 | ||
3291825f | 528 | static PADOFFSET |
cc76b5cc | 529 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f NC |
530 | { |
531 | dVAR; | |
532 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
533 | ||
cc76b5cc | 534 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 535 | |
cc76b5cc | 536 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
537 | |
538 | if (typestash) { | |
539 | assert(SvTYPE(namesv) == SVt_PVMG); | |
540 | SvPAD_TYPED_on(namesv); | |
541 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
542 | } | |
543 | if (ourstash) { | |
544 | SvPAD_OUR_on(namesv); | |
545 | SvOURSTASH_set(namesv, ourstash); | |
546 | SvREFCNT_inc_simple_void_NN(ourstash); | |
547 | } | |
59cfed7d | 548 | else if (flags & padadd_STATE) { |
3291825f NC |
549 | SvPAD_STATE_on(namesv); |
550 | } | |
551 | ||
552 | av_store(PL_comppad_name, offset, namesv); | |
553 | return offset; | |
554 | } | |
555 | ||
dd2155a4 | 556 | /* |
cc76b5cc | 557 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 558 | |
cc76b5cc Z |
559 | Allocates a place in the currently-compiling pad for a named lexical |
560 | variable. Stores the name and other metadata in the name part of the | |
561 | pad, and makes preparations to manage the variable's lexical scoping. | |
562 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 563 | |
cc76b5cc Z |
564 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
565 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
566 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
567 | to a package variable, and this identifies the package. The following | |
568 | flags can be OR'ed together: | |
569 | ||
570 | padadd_OUR redundantly specifies if it's a package var | |
571 | padadd_STATE variable will retain value persistently | |
572 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
573 | |
574 | =cut | |
575 | */ | |
576 | ||
dd2155a4 | 577 | PADOFFSET |
cc76b5cc Z |
578 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
579 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 580 | { |
97aff369 | 581 | dVAR; |
3291825f | 582 | PADOFFSET offset; |
cca43f78 | 583 | SV *namesv; |
e8b34487 | 584 | bool is_utf8; |
dd2155a4 | 585 | |
cc76b5cc | 586 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 587 | |
2435e5d3 | 588 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 589 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
590 | (UV)flags); |
591 | ||
592 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
593 | |
594 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
595 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
596 | } | |
597 | ||
0727928e BF |
598 | sv_setpvn(namesv, namepv, namelen); |
599 | ||
e8b34487 BF |
600 | if (is_utf8) { |
601 | flags |= padadd_UTF8_NAME; | |
602 | SvUTF8_on(namesv); | |
603 | } | |
604 | else | |
605 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 606 | |
59cfed7d | 607 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
2d12d04f | 608 | /* check for duplicate declaration */ |
59cfed7d | 609 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
2d12d04f NC |
610 | } |
611 | ||
2435e5d3 | 612 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
613 | |
614 | /* not yet introduced */ | |
2df5bdd7 DM |
615 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
616 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
617 | |
618 | if (!PL_min_intro_pending) | |
619 | PL_min_intro_pending = offset; | |
620 | PL_max_intro_pending = offset; | |
621 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
622 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
623 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 624 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 625 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 626 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 NC |
627 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
628 | assert(SvPADMY(PL_curpad[offset])); | |
3291825f NC |
629 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
630 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
631 | (long)offset, SvPVX(namesv), |
632 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
633 | |
634 | return offset; | |
635 | } | |
636 | ||
cc76b5cc Z |
637 | /* |
638 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 639 | |
cc76b5cc Z |
640 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
641 | instead of a string/length pair. | |
dd2155a4 | 642 | |
cc76b5cc Z |
643 | =cut |
644 | */ | |
645 | ||
646 | PADOFFSET | |
647 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 648 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
649 | { |
650 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
651 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
652 | } | |
dd2155a4 DM |
653 | |
654 | /* | |
cc76b5cc | 655 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 656 | |
cc76b5cc Z |
657 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
658 | of an SV instead of a string/length pair. | |
659 | ||
660 | =cut | |
661 | */ | |
662 | ||
663 | PADOFFSET | |
664 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
665 | { | |
666 | char *namepv; | |
667 | STRLEN namelen; | |
668 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
669 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
670 | if (SvUTF8(name)) |
671 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
672 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
673 | } | |
674 | ||
675 | /* | |
676 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
677 | ||
678 | Allocates a place in the currently-compiling pad, | |
679 | returning the offset of the allocated pad slot. | |
680 | No name is initially attached to the pad slot. | |
681 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
682 | which will be set in the value SV for the allocated pad entry: | |
683 | ||
684 | SVs_PADMY named lexical variable ("my", "our", "state") | |
685 | SVs_PADTMP unnamed temporary store | |
686 | ||
687 | I<optype> should be an opcode indicating the type of operation that the | |
688 | pad entry is to support. This doesn't affect operational semantics, | |
689 | but is used for debugging. | |
dd2155a4 DM |
690 | |
691 | =cut | |
692 | */ | |
693 | ||
694 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
695 | * or at least rationalise ??? */ | |
dd2155a4 DM |
696 | |
697 | PADOFFSET | |
698 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
699 | { | |
97aff369 | 700 | dVAR; |
dd2155a4 DM |
701 | SV *sv; |
702 | I32 retval; | |
703 | ||
6136c704 | 704 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
705 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
706 | ||
dd2155a4 | 707 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
708 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
709 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
710 | if (PL_pad_reset_pending) |
711 | pad_reset(); | |
712 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 713 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 714 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
715 | retval = AvFILLp(PL_comppad); |
716 | } | |
717 | else { | |
cc76b5cc Z |
718 | /* For a tmp, scan the pad from PL_padix upwards |
719 | * for a slot which has no name and no active value. | |
720 | */ | |
551405c4 | 721 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 722 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
723 | for (;;) { |
724 | /* | |
725 | * "foreach" index vars temporarily become aliases to non-"my" | |
726 | * values. Thus we must skip, not just pad values that are | |
727 | * marked as current pad values, but also those with names. | |
728 | */ | |
729 | /* HVDS why copy to sv here? we don't seem to use it */ | |
730 | if (++PL_padix <= names_fill && | |
731 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
732 | continue; | |
733 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
734 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
735 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
736 | break; | |
737 | } | |
738 | retval = PL_padix; | |
739 | } | |
740 | SvFLAGS(sv) |= tmptype; | |
741 | PL_curpad = AvARRAY(PL_comppad); | |
742 | ||
743 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
744 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
745 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
746 | PL_op_name[optype])); | |
fd0854ff DM |
747 | #ifdef DEBUG_LEAKING_SCALARS |
748 | sv->sv_debug_optype = optype; | |
749 | sv->sv_debug_inpad = 1; | |
fd0854ff | 750 | #endif |
a212c8b5 | 751 | return (PADOFFSET)retval; |
dd2155a4 DM |
752 | } |
753 | ||
754 | /* | |
cc76b5cc | 755 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 756 | |
cc76b5cc Z |
757 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
758 | for an anonymous function that is lexically scoped inside the | |
759 | currently-compiling function. | |
760 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
761 | to the outer scope is weakened to avoid a reference loop. | |
762 | ||
763 | I<optype> should be an opcode indicating the type of operation that the | |
764 | pad entry is to support. This doesn't affect operational semantics, | |
765 | but is used for debugging. | |
dd2155a4 DM |
766 | |
767 | =cut | |
768 | */ | |
769 | ||
770 | PADOFFSET | |
cc76b5cc | 771 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 | 772 | { |
97aff369 | 773 | dVAR; |
dd2155a4 | 774 | PADOFFSET ix; |
b9f83d2f | 775 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
776 | |
777 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
778 | ||
1dba731d | 779 | pad_peg("add_anon"); |
76f68e9b | 780 | sv_setpvs(name, "&"); |
0d311cdb DM |
781 | /* These two aren't used; just make sure they're not equal to |
782 | * PERL_PADSEQ_INTRO */ | |
783 | COP_SEQ_RANGE_LOW_set(name, 0); | |
784 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 785 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 786 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 787 | /* XXX DAPM use PL_curpad[] ? */ |
e09ac076 FC |
788 | if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func)) |
789 | av_store(PL_comppad, ix, (SV*)func); | |
790 | else { | |
791 | SV *rv = newRV_inc((SV *)func); | |
792 | sv_rvweaken(rv); | |
793 | assert (SvTYPE(func) == SVt_PVFM); | |
794 | av_store(PL_comppad, ix, rv); | |
795 | } | |
cc76b5cc | 796 | SvPADMY_on((SV*)func); |
7dafbf52 DM |
797 | |
798 | /* to avoid ref loops, we never have parent + child referencing each | |
799 | * other simultaneously */ | |
e09ac076 | 800 | if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) { |
cc76b5cc Z |
801 | assert(!CvWEAKOUTSIDE(func)); |
802 | CvWEAKOUTSIDE_on(func); | |
803 | SvREFCNT_dec(CvOUTSIDE(func)); | |
7dafbf52 | 804 | } |
dd2155a4 DM |
805 | return ix; |
806 | } | |
807 | ||
dd2155a4 | 808 | /* |
13087dd8 | 809 | =for apidoc pad_check_dup |
dd2155a4 DM |
810 | |
811 | Check for duplicate declarations: report any of: | |
13087dd8 | 812 | |
dd2155a4 | 813 | * a my in the current scope with the same name; |
13087dd8 FC |
814 | * an our (anywhere in the pad) with the same name and the |
815 | same stash as C<ourstash> | |
816 | ||
817 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
818 | |
819 | =cut | |
820 | */ | |
821 | ||
20381b50 | 822 | STATIC void |
cc76b5cc | 823 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 824 | { |
97aff369 | 825 | dVAR; |
53c1dcc0 | 826 | SV **svp; |
dd2155a4 | 827 | PADOFFSET top, off; |
59cfed7d | 828 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 829 | |
7918f24d NC |
830 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
831 | ||
f3548bdc | 832 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 833 | |
59cfed7d | 834 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 835 | |
041457d9 | 836 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
837 | return; /* nothing to check */ |
838 | ||
839 | svp = AvARRAY(PL_comppad_name); | |
840 | top = AvFILLp(PL_comppad_name); | |
841 | /* check the current scope */ | |
842 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
843 | * type ? */ | |
844 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
845 | SV * const sv = svp[off]; |
846 | if (sv | |
dd2155a4 | 847 | && sv != &PL_sv_undef |
ee6cee0c | 848 | && !SvFAKE(sv) |
0d311cdb DM |
849 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
850 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 851 | && sv_eq(name, sv)) |
dd2155a4 | 852 | { |
00b1698f | 853 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 854 | break; /* "our" masking "our" */ |
dd2155a4 | 855 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 | 856 | "\"%s\" variable %"SVf" masks earlier declaration in same %s", |
12bd6ede | 857 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
c541b9b4 | 858 | sv, |
2df5bdd7 DM |
859 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
860 | ? "scope" : "statement")); | |
dd2155a4 DM |
861 | --off; |
862 | break; | |
863 | } | |
864 | } | |
865 | /* check the rest of the pad */ | |
866 | if (is_our) { | |
61c5492a | 867 | while (off > 0) { |
53c1dcc0 AL |
868 | SV * const sv = svp[off]; |
869 | if (sv | |
dd2155a4 | 870 | && sv != &PL_sv_undef |
ee6cee0c | 871 | && !SvFAKE(sv) |
0d311cdb DM |
872 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
873 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 874 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 875 | && sv_eq(name, sv)) |
dd2155a4 DM |
876 | { |
877 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c541b9b4 | 878 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 | 879 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
880 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
881 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
882 | break; |
883 | } | |
61c5492a NC |
884 | --off; |
885 | } | |
dd2155a4 DM |
886 | } |
887 | } | |
888 | ||
889 | ||
dd2155a4 | 890 | /* |
cc76b5cc | 891 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 892 | |
cc76b5cc Z |
893 | Given the name of a lexical variable, find its position in the |
894 | currently-compiling pad. | |
895 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
896 | I<flags> is reserved and must be zero. | |
897 | If it is not in the current pad but appears in the pad of any lexically | |
898 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
899 | Returns the offset in the current pad, | |
900 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
901 | |
902 | =cut | |
903 | */ | |
904 | ||
905 | PADOFFSET | |
cc76b5cc | 906 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 907 | { |
97aff369 | 908 | dVAR; |
b5c19bd7 DM |
909 | SV *out_sv; |
910 | int out_flags; | |
929a0744 | 911 | I32 offset; |
e1ec3a88 | 912 | const AV *nameav; |
929a0744 | 913 | SV **name_svp; |
dd2155a4 | 914 | |
cc76b5cc | 915 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 916 | |
cc76b5cc | 917 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 918 | |
2435e5d3 | 919 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 920 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
921 | (UV)flags); |
922 | ||
e8b34487 BF |
923 | if (flags & padadd_UTF8_NAME) { |
924 | bool is_utf8 = TRUE; | |
925 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
926 | ||
927 | if (is_utf8) | |
928 | flags |= padadd_UTF8_NAME; | |
929 | else | |
930 | flags &= ~padadd_UTF8_NAME; | |
931 | } | |
932 | ||
fbb889c8 BF |
933 | offset = pad_findlex(namepv, namelen, flags, |
934 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 935 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
936 | return offset; |
937 | ||
938 | /* look for an our that's being introduced; this allows | |
939 | * our $foo = 0 unless defined $foo; | |
940 | * to not give a warning. (Yes, this is a hack) */ | |
941 | ||
502c6561 | 942 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 DM |
943 | name_svp = AvARRAY(nameav); |
944 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 945 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
946 | if (namesv && namesv != &PL_sv_undef |
947 | && !SvFAKE(namesv) | |
00b1698f | 948 | && (SvPAD_OUR(namesv)) |
cc76b5cc | 949 | && SvCUR(namesv) == namelen |
e8b34487 BF |
950 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
951 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 952 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
953 | ) |
954 | return offset; | |
955 | } | |
956 | return NOT_IN_PAD; | |
dd2155a4 DM |
957 | } |
958 | ||
e1f795dc | 959 | /* |
cc76b5cc Z |
960 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
961 | ||
962 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
963 | instead of a string/length pair. | |
964 | ||
965 | =cut | |
966 | */ | |
967 | ||
968 | PADOFFSET | |
969 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
970 | { | |
971 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
972 | return pad_findmy_pvn(name, strlen(name), flags); | |
973 | } | |
974 | ||
975 | /* | |
976 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
977 | ||
978 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
979 | of an SV instead of a string/length pair. | |
980 | ||
981 | =cut | |
982 | */ | |
983 | ||
984 | PADOFFSET | |
985 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
986 | { | |
987 | char *namepv; | |
988 | STRLEN namelen; | |
989 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
990 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
991 | if (SvUTF8(name)) |
992 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
993 | return pad_findmy_pvn(namepv, namelen, flags); |
994 | } | |
995 | ||
996 | /* | |
997 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
998 | ||
999 | Find the position of the lexical C<$_> in the pad of the | |
1000 | currently-executing function. Returns the offset in the current pad, | |
1001 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1002 | the global one should be used instead). | |
1003 | L</find_rundefsv> is likely to be more convenient. | |
1004 | ||
1005 | =cut | |
1006 | */ | |
e1f795dc RGS |
1007 | |
1008 | PADOFFSET | |
29289021 | 1009 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 1010 | { |
97aff369 | 1011 | dVAR; |
e1f795dc RGS |
1012 | SV *out_sv; |
1013 | int out_flags; | |
fbb889c8 | 1014 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 1015 | NULL, &out_sv, &out_flags); |
e1f795dc | 1016 | } |
dd2155a4 | 1017 | |
dd2155a4 | 1018 | /* |
cc76b5cc Z |
1019 | =for apidoc Am|SV *|find_rundefsv |
1020 | ||
1021 | Find and return the variable that is named C<$_> in the lexical scope | |
1022 | of the currently-executing function. This may be a lexical C<$_>, | |
1023 | or will otherwise be the global one. | |
1024 | ||
1025 | =cut | |
1026 | */ | |
789bd863 VP |
1027 | |
1028 | SV * | |
1029 | Perl_find_rundefsv(pTHX) | |
1030 | { | |
1031 | SV *namesv; | |
1032 | int flags; | |
1033 | PADOFFSET po; | |
1034 | ||
fbb889c8 | 1035 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
1036 | NULL, &namesv, &flags); |
1037 | ||
1979170b | 1038 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
1039 | return DEFSV; |
1040 | ||
1041 | return PAD_SVl(po); | |
1042 | } | |
1043 | ||
c086f97a FC |
1044 | SV * |
1045 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1046 | { | |
1047 | SV *namesv; | |
1048 | int flags; | |
1049 | PADOFFSET po; | |
1050 | ||
1051 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1052 | ||
1053 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1054 | NULL, &namesv, &flags); | |
1055 | ||
1056 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1057 | return DEFSV; | |
1058 | ||
1059 | return AvARRAY((PAD*) (AvARRAY(CvPADLIST(cv))[CvDEPTH(cv)]))[po]; | |
1060 | } | |
1061 | ||
789bd863 | 1062 | /* |
fbb889c8 | 1063 | =for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|SV** out_name_sv|int *out_flags |
dd2155a4 DM |
1064 | |
1065 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
1066 | in the inner pads if it's found in an outer one. |
1067 | ||
1068 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1069 | cv is the CV in which to start the search, and seq is the current cop_seq | |
1070 | to match against. If warn is true, print appropriate warnings. The out_* | |
1071 | vars return values, and so are pointers to where the returned values | |
1072 | should be stored. out_capture, if non-null, requests that the innermost | |
1073 | instance of the lexical is captured; out_name_sv is set to the innermost | |
1074 | matched namesv or fake namesv; out_flags returns the flags normally | |
1075 | associated with the IVX field of a fake namesv. | |
1076 | ||
1077 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
1078 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 1079 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1080 | the parent pad. |
dd2155a4 DM |
1081 | |
1082 | =cut | |
1083 | */ | |
1084 | ||
b5c19bd7 DM |
1085 | /* the CV has finished being compiled. This is not a sufficient test for |
1086 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1087 | #define CvCOMPILED(cv) CvROOT(cv) | |
1088 | ||
71f882da DM |
1089 | /* the CV does late binding of its lexicals */ |
1090 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
1091 | ||
b5c19bd7 | 1092 | |
dd2155a4 | 1093 | STATIC PADOFFSET |
fbb889c8 | 1094 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1095 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1096 | { |
97aff369 | 1097 | dVAR; |
b5c19bd7 DM |
1098 | I32 offset, new_offset; |
1099 | SV *new_capture; | |
1100 | SV **new_capturep; | |
b64e5050 | 1101 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 1102 | |
7918f24d NC |
1103 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1104 | ||
2435e5d3 BF |
1105 | if (flags & ~padadd_UTF8_NAME) |
1106 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, | |
1107 | (UV)flags); | |
1108 | ||
b5c19bd7 | 1109 | *out_flags = 0; |
a3985cdc | 1110 | |
b5c19bd7 | 1111 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1112 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1113 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1114 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1115 | |
b5c19bd7 | 1116 | /* first, search this pad */ |
dd2155a4 | 1117 | |
b5c19bd7 DM |
1118 | if (padlist) { /* not an undef CV */ |
1119 | I32 fake_offset = 0; | |
502c6561 | 1120 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 1121 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1122 | |
b5c19bd7 | 1123 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 1124 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 1125 | if (namesv && namesv != &PL_sv_undef |
cc76b5cc | 1126 | && SvCUR(namesv) == namelen |
e8b34487 BF |
1127 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1128 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1129 | { |
6012dc80 | 1130 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1131 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1132 | continue; |
1133 | } | |
1134 | /* is seq within the range _LOW to _HIGH ? | |
1135 | * This is complicated by the fact that PL_cop_seqmax | |
1136 | * may have wrapped around at some point */ | |
1137 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1138 | continue; /* not yet introduced */ | |
1139 | ||
1140 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1141 | /* in compiling scope */ | |
1142 | if ( | |
1143 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1144 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1145 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1146 | ) | |
1147 | break; | |
1148 | } | |
1149 | else if ( | |
1150 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1151 | ? | |
1152 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1153 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1154 | ||
1155 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1156 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1157 | ) | |
1158 | break; | |
ee6cee0c DM |
1159 | } |
1160 | } | |
1161 | ||
b5c19bd7 DM |
1162 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1163 | if (offset > 0) { /* not fake */ | |
1164 | fake_offset = 0; | |
1165 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1166 | ||
1167 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1168 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1169 | * ideally, we should detect my's declared within loops | |
1170 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1171 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1172 | * lexes as not multi as viewed from evals. */ |
1173 | ||
1174 | *out_flags = CvANON(cv) ? | |
1175 | PAD_FAKELEX_ANON : | |
1176 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1177 | ? PAD_FAKELEX_MULTI : 0; | |
1178 | ||
1179 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1180 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1181 | PTR2UV(cv), (long)offset, | |
1182 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1183 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1184 | } |
1185 | else { /* fake match */ | |
1186 | offset = fake_offset; | |
1187 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1188 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1189 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1190 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1191 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1192 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1193 | )); |
1194 | } | |
dd2155a4 | 1195 | |
b5c19bd7 | 1196 | /* return the lex? */ |
dd2155a4 | 1197 | |
b5c19bd7 | 1198 | if (out_capture) { |
dd2155a4 | 1199 | |
b5c19bd7 | 1200 | /* our ? */ |
00b1698f | 1201 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1202 | *out_capture = NULL; |
b5c19bd7 DM |
1203 | return offset; |
1204 | } | |
ee6cee0c | 1205 | |
b5c19bd7 DM |
1206 | /* trying to capture from an anon prototype? */ |
1207 | if (CvCOMPILED(cv) | |
1208 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1209 | : *out_flags & PAD_FAKELEX_ANON) | |
1210 | { | |
a2a5de95 NC |
1211 | if (warn) |
1212 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1213 | "Variable \"%"SVf"\" is not available", |
1214 | newSVpvn_flags(namepv, namelen, | |
1215 | SVs_TEMP | | |
1216 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1217 | ||
a0714e2c | 1218 | *out_capture = NULL; |
b5c19bd7 | 1219 | } |
ee6cee0c | 1220 | |
b5c19bd7 DM |
1221 | /* real value */ |
1222 | else { | |
1223 | int newwarn = warn; | |
1224 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1225 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1226 | && warn && ckWARN(WARN_CLOSURE)) { |
1227 | newwarn = 0; | |
1228 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1229 | "Variable \"%"SVf"\" will not stay shared", |
1230 | newSVpvn_flags(namepv, namelen, | |
1231 | SVs_TEMP | | |
1232 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
b5c19bd7 | 1233 | } |
dd2155a4 | 1234 | |
b5c19bd7 DM |
1235 | if (fake_offset && CvANON(cv) |
1236 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1237 | { | |
1238 | SV *n; | |
1239 | /* not yet caught - look further up */ | |
1240 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1241 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1242 | PTR2UV(cv))); | |
1243 | n = *out_name_sv; | |
fbb889c8 | 1244 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1245 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1246 | newwarn, out_capture, out_name_sv, out_flags); |
1247 | *out_name_sv = n; | |
1248 | return offset; | |
dd2155a4 | 1249 | } |
b5c19bd7 | 1250 | |
502c6561 NC |
1251 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
1252 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
1253 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1254 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1255 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1256 | |
d1186544 DM |
1257 | if (SvPADSTALE(*out_capture) |
1258 | && !SvPAD_STATE(name_svp[offset])) | |
1259 | { | |
a2a5de95 | 1260 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e BF |
1261 | "Variable \"%"SVf"\" is not available", |
1262 | newSVpvn_flags(namepv, namelen, | |
1263 | SVs_TEMP | | |
1264 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1265 | *out_capture = NULL; |
dd2155a4 DM |
1266 | } |
1267 | } | |
b5c19bd7 | 1268 | if (!*out_capture) { |
cc76b5cc | 1269 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1270 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1271 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1272 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
1273 | else |
1274 | *out_capture = sv_newmortal(); | |
1275 | } | |
dd2155a4 | 1276 | } |
b5c19bd7 DM |
1277 | |
1278 | return offset; | |
ee6cee0c | 1279 | } |
b5c19bd7 DM |
1280 | } |
1281 | ||
1282 | /* it's not in this pad - try above */ | |
1283 | ||
1284 | if (!CvOUTSIDE(cv)) | |
1285 | return NOT_IN_PAD; | |
9f7d9405 | 1286 | |
b5c19bd7 | 1287 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1288 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1289 | new_capturep = out_capture ? out_capture : |
4608196e | 1290 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1291 | |
fbb889c8 | 1292 | offset = pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, |
b5c19bd7 | 1293 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1294 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1295 | return NOT_IN_PAD; |
9f7d9405 | 1296 | |
b5c19bd7 DM |
1297 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1298 | ||
1299 | /* don't add new fake entries (via eval) to CVs that we have already | |
1300 | * finished compiling, or to undef CVs */ | |
1301 | if (CvCOMPILED(cv) || !padlist) | |
1302 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1303 | ||
1304 | { | |
3291825f | 1305 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1306 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1307 | "good" and only copying flag bits and pointers that it understands. |
1308 | */ | |
1309 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1310 | AV * const ocomppad_name = PL_comppad_name; |
1311 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
1312 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1313 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
1314 | PL_curpad = AvARRAY(PL_comppad); |
1315 | ||
3291825f | 1316 | new_offset |
cc76b5cc | 1317 | = pad_alloc_name(new_namesv, |
59cfed7d | 1318 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1319 | SvPAD_TYPED(*out_name_sv) |
1320 | ? SvSTASH(*out_name_sv) : NULL, | |
1321 | SvOURSTASH(*out_name_sv) | |
1322 | ); | |
1323 | ||
1324 | SvFAKE_on(new_namesv); | |
1325 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1326 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1327 | (long)new_offset, | |
1328 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1329 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1330 | |
809abb02 | 1331 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1332 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1333 | NOOP; /* do nothing */ |
b5c19bd7 | 1334 | } |
71f882da | 1335 | else if (CvLATE(cv)) { |
b5c19bd7 | 1336 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1337 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1338 | CvCLONE_on(cv); |
1339 | } | |
1340 | else { | |
1341 | /* immediate creation - capture outer value right now */ | |
1342 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
1343 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1344 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1345 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1346 | } |
b5c19bd7 | 1347 | *out_name_sv = new_namesv; |
809abb02 | 1348 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1349 | |
1350 | PL_comppad_name = ocomppad_name; | |
1351 | PL_comppad = ocomppad; | |
4608196e | 1352 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1353 | } |
b5c19bd7 | 1354 | return new_offset; |
dd2155a4 DM |
1355 | } |
1356 | ||
fb8a9836 | 1357 | #ifdef DEBUGGING |
cc76b5cc | 1358 | |
dd2155a4 | 1359 | /* |
cc76b5cc | 1360 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1361 | |
cc76b5cc | 1362 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1363 | Use macro PAD_SV instead of calling this function directly. |
1364 | ||
1365 | =cut | |
1366 | */ | |
1367 | ||
dd2155a4 DM |
1368 | SV * |
1369 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1370 | { | |
97aff369 | 1371 | dVAR; |
f3548bdc | 1372 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1373 | |
dd2155a4 DM |
1374 | if (!po) |
1375 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1376 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1377 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1378 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1379 | ); |
1380 | return PL_curpad[po]; | |
1381 | } | |
1382 | ||
dd2155a4 | 1383 | /* |
cc76b5cc | 1384 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1385 | |
cc76b5cc | 1386 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1387 | Use the macro PAD_SETSV() rather than calling this function directly. |
1388 | ||
1389 | =cut | |
1390 | */ | |
1391 | ||
dd2155a4 DM |
1392 | void |
1393 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1394 | { | |
97aff369 | 1395 | dVAR; |
7918f24d NC |
1396 | |
1397 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1398 | ||
f3548bdc | 1399 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1400 | |
1401 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1402 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1403 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1404 | ); |
1405 | PL_curpad[po] = sv; | |
1406 | } | |
dd2155a4 | 1407 | |
cc76b5cc | 1408 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1409 | |
1410 | /* | |
cc76b5cc | 1411 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 DM |
1412 | |
1413 | Update the pad compilation state variables on entry to a new block | |
1414 | ||
1415 | =cut | |
1416 | */ | |
1417 | ||
1418 | /* XXX DAPM perhaps: | |
1419 | * - integrate this in general state-saving routine ??? | |
1420 | * - combine with the state-saving going on in pad_new ??? | |
1421 | * - introduce a new SAVE type that does all this in one go ? | |
1422 | */ | |
1423 | ||
1424 | void | |
1425 | Perl_pad_block_start(pTHX_ int full) | |
1426 | { | |
97aff369 | 1427 | dVAR; |
f3548bdc | 1428 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1429 | SAVEI32(PL_comppad_name_floor); |
1430 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1431 | if (full) | |
1432 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1433 | if (PL_comppad_name_floor < 0) | |
1434 | PL_comppad_name_floor = 0; | |
1435 | SAVEI32(PL_min_intro_pending); | |
1436 | SAVEI32(PL_max_intro_pending); | |
1437 | PL_min_intro_pending = 0; | |
1438 | SAVEI32(PL_comppad_name_fill); | |
1439 | SAVEI32(PL_padix_floor); | |
1440 | PL_padix_floor = PL_padix; | |
1441 | PL_pad_reset_pending = FALSE; | |
1442 | } | |
1443 | ||
dd2155a4 | 1444 | /* |
cc76b5cc | 1445 | =for apidoc m|U32|intro_my |
dd2155a4 | 1446 | |
bf954566 FC |
1447 | "Introduce" my variables to visible status. This is called during parsing |
1448 | at the end of each statement to make lexical variables visible to | |
1449 | subsequent statements. | |
dd2155a4 DM |
1450 | |
1451 | =cut | |
1452 | */ | |
1453 | ||
1454 | U32 | |
1455 | Perl_intro_my(pTHX) | |
1456 | { | |
97aff369 | 1457 | dVAR; |
dd2155a4 | 1458 | SV **svp; |
dd2155a4 | 1459 | I32 i; |
6012dc80 | 1460 | U32 seq; |
dd2155a4 | 1461 | |
f3548bdc | 1462 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1463 | if (! PL_min_intro_pending) |
1464 | return PL_cop_seqmax; | |
1465 | ||
1466 | svp = AvARRAY(PL_comppad_name); | |
1467 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1468 | SV * const sv = svp[i]; |
1469 | ||
0d311cdb DM |
1470 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1471 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1472 | { | |
2df5bdd7 | 1473 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1474 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1475 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1476 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1477 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1478 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1479 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1480 | ); |
1481 | } | |
1482 | } | |
6012dc80 DM |
1483 | seq = PL_cop_seqmax; |
1484 | PL_cop_seqmax++; | |
1485 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1486 | PL_cop_seqmax++; | |
dd2155a4 DM |
1487 | PL_min_intro_pending = 0; |
1488 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1489 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1490 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1491 | |
6012dc80 | 1492 | return seq; |
dd2155a4 DM |
1493 | } |
1494 | ||
1495 | /* | |
cc76b5cc | 1496 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1497 | |
1498 | Cleanup at end of scope during compilation: set the max seq number for | |
1499 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1500 | ||
1501 | =cut | |
1502 | */ | |
1503 | ||
1504 | void | |
1505 | Perl_pad_leavemy(pTHX) | |
1506 | { | |
97aff369 | 1507 | dVAR; |
dd2155a4 | 1508 | I32 off; |
551405c4 | 1509 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1510 | |
1511 | PL_pad_reset_pending = FALSE; | |
1512 | ||
f3548bdc | 1513 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1514 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1515 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1516 | const SV * const sv = svp[off]; |
9b387841 NC |
1517 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1518 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1519 | "%"SVf" never introduced", | |
1520 | SVfARG(sv)); | |
dd2155a4 DM |
1521 | } |
1522 | } | |
1523 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1524 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1525 | const SV * const sv = svp[off]; |
2df5bdd7 DM |
1526 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1527 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1528 | { | |
809abb02 | 1529 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1530 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1531 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1532 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1533 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1534 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1535 | ); |
1536 | } | |
1537 | } | |
1538 | PL_cop_seqmax++; | |
6012dc80 DM |
1539 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1540 | PL_cop_seqmax++; | |
dd2155a4 DM |
1541 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1542 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1543 | } | |
1544 | ||
dd2155a4 | 1545 | /* |
cc76b5cc | 1546 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1547 | |
1548 | Abandon the tmp in the current pad at offset po and replace with a | |
1549 | new one. | |
1550 | ||
1551 | =cut | |
1552 | */ | |
1553 | ||
1554 | void | |
1555 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1556 | { | |
97aff369 | 1557 | dVAR; |
f3548bdc | 1558 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1559 | if (!PL_curpad) |
1560 | return; | |
1561 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1562 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1563 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1564 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1565 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1566 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1567 | |
1568 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1569 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1570 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1571 | ||
1572 | if (PL_curpad[po]) | |
1573 | SvPADTMP_off(PL_curpad[po]); | |
1574 | if (refadjust) | |
1575 | SvREFCNT_dec(PL_curpad[po]); | |
1576 | ||
9ad9869c DM |
1577 | |
1578 | /* if pad tmps aren't shared between ops, then there's no need to | |
1579 | * create a new tmp when an existing op is freed */ | |
1580 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1581 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1582 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1583 | #else |
1584 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1585 | #endif |
dd2155a4 DM |
1586 | if ((I32)po < PL_padix) |
1587 | PL_padix = po - 1; | |
1588 | } | |
1589 | ||
dd2155a4 | 1590 | /* |
cc76b5cc | 1591 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1592 | |
1593 | Mark all the current temporaries for reuse | |
1594 | ||
1595 | =cut | |
1596 | */ | |
1597 | ||
1598 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1599 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1600 | * on the stack by OPs that use them, there are several ways to get an alias | |
1601 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1602 | * We avoid doing this until we can think of a Better Way. | |
1603 | * GSAR 97-10-29 */ | |
1f676739 | 1604 | static void |
82af08ae | 1605 | S_pad_reset(pTHX) |
dd2155a4 | 1606 | { |
97aff369 | 1607 | dVAR; |
dd2155a4 | 1608 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 | 1609 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1610 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1611 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1612 | |
1613 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1614 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1615 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1616 | (long)PL_padix, (long)PL_padix_floor | |
1617 | ) | |
1618 | ); | |
1619 | ||
1620 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1621 | register I32 po; |
dd2155a4 DM |
1622 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1623 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1624 | SvPADTMP_off(PL_curpad[po]); | |
1625 | } | |
1626 | PL_padix = PL_padix_floor; | |
1627 | } | |
1628 | #endif | |
1629 | PL_pad_reset_pending = FALSE; | |
1630 | } | |
1631 | ||
dd2155a4 | 1632 | /* |
cc76b5cc Z |
1633 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1634 | ||
1635 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1636 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1637 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1638 | the kind of subroutine: | |
dd2155a4 | 1639 | |
cc76b5cc Z |
1640 | padtidy_SUB ordinary subroutine |
1641 | padtidy_SUBCLONE prototype for lexical closure | |
1642 | padtidy_FORMAT format | |
dd2155a4 DM |
1643 | |
1644 | =cut | |
1645 | */ | |
1646 | ||
1647 | /* XXX DAPM surely most of this stuff should be done properly | |
1648 | * at the right time beforehand, rather than going around afterwards | |
1649 | * cleaning up our mistakes ??? | |
1650 | */ | |
1651 | ||
1652 | void | |
1653 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1654 | { | |
27da23d5 | 1655 | dVAR; |
dd2155a4 | 1656 | |
f3548bdc | 1657 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1658 | |
1659 | /* If this CV has had any 'eval-capable' ops planted in it | |
1660 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1661 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1662 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1663 | * the right CvOUTSIDE. | |
1664 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1665 | * executed within it. |
b5c19bd7 DM |
1666 | */ |
1667 | ||
1668 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1669 | const CV *cv; |
b5c19bd7 DM |
1670 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1671 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1672 | break; /* no need to mark already-compiled code */ | |
1673 | if (CvANON(cv)) { | |
1674 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1675 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1676 | CvCLONE_on(cv); | |
a0d2bbd5 | 1677 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1678 | } |
1679 | } | |
1680 | } | |
1681 | ||
dd2155a4 DM |
1682 | /* extend curpad to match namepad */ |
1683 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1684 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1685 | |
1686 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1687 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1688 | PADOFFSET ix; |
b5c19bd7 | 1689 | |
dd2155a4 DM |
1690 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1691 | SV *namesv; | |
1692 | ||
1693 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1694 | continue; | |
1695 | /* | |
1696 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1697 | * pad are anonymous subs. |
dd2155a4 DM |
1698 | * The rest are created anew during cloning. |
1699 | */ | |
a0714e2c | 1700 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1701 | namesv != &PL_sv_undef && |
b15aece3 | 1702 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1703 | { |
1704 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1705 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1706 | } |
1707 | } | |
1708 | } | |
1709 | else if (type == padtidy_SUB) { | |
1710 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1711 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1712 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1713 | AvREIFY_only(av); |
dd2155a4 DM |
1714 | } |
1715 | ||
4cee4ca8 | 1716 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1717 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1718 | PADOFFSET ix; |
dd2155a4 DM |
1719 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1720 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1721 | continue; | |
adf8f095 | 1722 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1723 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1724 | } else if (!SvFAKE(namep[ix])) { |
1725 | /* This is a work around for how the current implementation of | |
1726 | ?{ } blocks in regexps interacts with lexicals. | |
1727 | ||
1728 | One of our lexicals. | |
1729 | Can't do this on all lexicals, otherwise sub baz() won't | |
1730 | compile in | |
1731 | ||
1732 | my $foo; | |
1733 | ||
1734 | sub bar { ++$foo; } | |
1735 | ||
1736 | sub baz { ++$foo; } | |
1737 | ||
1738 | because completion of compiling &bar calling pad_tidy() | |
1739 | would cause (top level) $foo to be marked as stale, and | |
1740 | "no longer available". */ | |
1741 | SvPADSTALE_on(PL_curpad[ix]); | |
1742 | } | |
dd2155a4 DM |
1743 | } |
1744 | } | |
f3548bdc | 1745 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1746 | } |
1747 | ||
dd2155a4 | 1748 | /* |
cc76b5cc | 1749 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1750 | |
8627550a | 1751 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1752 | |
1753 | =cut | |
1754 | */ | |
1755 | ||
1756 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1757 | void | |
1758 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1759 | { | |
97aff369 | 1760 | dVAR; |
f3548bdc | 1761 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1762 | if (!PL_curpad) |
1763 | return; | |
1764 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1765 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1766 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1767 | if (!po) |
1768 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1769 | ||
1770 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1771 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1772 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1773 | ); | |
1774 | ||
1775 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
9a214eec | 1776 | SvFLAGS(PL_curpad[po]) &= ~SVs_PADTMP; /* also clears SVs_PADSTALE */ |
dd2155a4 DM |
1777 | } |
1778 | if ((I32)po < PL_padix) | |
1779 | PL_padix = po - 1; | |
1780 | } | |
1781 | ||
dd2155a4 | 1782 | /* |
cc76b5cc | 1783 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1784 | |
1785 | Dump the contents of a padlist | |
1786 | ||
1787 | =cut | |
1788 | */ | |
1789 | ||
1790 | void | |
1791 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1792 | { | |
97aff369 | 1793 | dVAR; |
e1ec3a88 AL |
1794 | const AV *pad_name; |
1795 | const AV *pad; | |
dd2155a4 DM |
1796 | SV **pname; |
1797 | SV **ppad; | |
dd2155a4 DM |
1798 | I32 ix; |
1799 | ||
7918f24d NC |
1800 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1801 | ||
dd2155a4 DM |
1802 | if (!padlist) { |
1803 | return; | |
1804 | } | |
502c6561 NC |
1805 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1806 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1807 | pname = AvARRAY(pad_name); |
1808 | ppad = AvARRAY(pad); | |
1809 | Perl_dump_indent(aTHX_ level, file, | |
1810 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1811 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1812 | ); | |
1813 | ||
1814 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1815 | const SV *namesv = pname[ix]; |
dd2155a4 | 1816 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1817 | namesv = NULL; |
dd2155a4 DM |
1818 | } |
1819 | if (namesv) { | |
ee6cee0c DM |
1820 | if (SvFAKE(namesv)) |
1821 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1822 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1823 | (int) ix, |
1824 | PTR2UV(ppad[ix]), | |
1825 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1826 | SvPVX_const(namesv), |
809abb02 NC |
1827 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1828 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1829 | |
ee6cee0c DM |
1830 | ); |
1831 | else | |
1832 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1833 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1834 | (int) ix, |
1835 | PTR2UV(ppad[ix]), | |
1836 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1837 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1838 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1839 | SvPVX_const(namesv) |
ee6cee0c | 1840 | ); |
dd2155a4 DM |
1841 | } |
1842 | else if (full) { | |
1843 | Perl_dump_indent(aTHX_ level+1, file, | |
1844 | "%2d. 0x%"UVxf"<%lu>\n", | |
1845 | (int) ix, | |
1846 | PTR2UV(ppad[ix]), | |
1847 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1848 | ); | |
1849 | } | |
1850 | } | |
1851 | } | |
1852 | ||
cc76b5cc | 1853 | #ifdef DEBUGGING |
dd2155a4 DM |
1854 | |
1855 | /* | |
cc76b5cc | 1856 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1857 | |
1858 | dump the contents of a CV | |
1859 | ||
1860 | =cut | |
1861 | */ | |
1862 | ||
dd2155a4 | 1863 | STATIC void |
e1ec3a88 | 1864 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1865 | { |
97aff369 | 1866 | dVAR; |
53c1dcc0 AL |
1867 | const CV * const outside = CvOUTSIDE(cv); |
1868 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1869 | |
7918f24d NC |
1870 | PERL_ARGS_ASSERT_CV_DUMP; |
1871 | ||
dd2155a4 DM |
1872 | PerlIO_printf(Perl_debug_log, |
1873 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1874 | title, | |
1875 | PTR2UV(cv), | |
1876 | (CvANON(cv) ? "ANON" | |
71f882da | 1877 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1878 | : (cv == PL_main_cv) ? "MAIN" |
1879 | : CvUNIQUE(cv) ? "UNIQUE" | |
1880 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1881 | PTR2UV(outside), | |
1882 | (!outside ? "null" | |
1883 | : CvANON(outside) ? "ANON" | |
1884 | : (outside == PL_main_cv) ? "MAIN" | |
1885 | : CvUNIQUE(outside) ? "UNIQUE" | |
1886 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1887 | ||
1888 | PerlIO_printf(Perl_debug_log, | |
1889 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1890 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1891 | } | |
dd2155a4 | 1892 | |
cc76b5cc | 1893 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1894 | |
1895 | /* | |
cc76b5cc | 1896 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1897 | |
cc76b5cc Z |
1898 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1899 | of the function: its code, pad structure, and other attributes. | |
1900 | The prototype is combined with a capture of outer lexicals to which the | |
1901 | code refers, which are taken from the currently-executing instance of | |
1902 | the immediately surrounding code. | |
dd2155a4 DM |
1903 | |
1904 | =cut | |
1905 | */ | |
1906 | ||
1907 | CV * | |
1908 | Perl_cv_clone(pTHX_ CV *proto) | |
1909 | { | |
27da23d5 | 1910 | dVAR; |
dd2155a4 | 1911 | I32 ix; |
53c1dcc0 | 1912 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1913 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1914 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1915 | SV** const pname = AvARRAY(protopad_name); |
1916 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1917 | const I32 fname = AvFILLp(protopad_name); |
1918 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1919 | CV* cv; |
b5c19bd7 DM |
1920 | SV** outpad; |
1921 | CV* outside; | |
71f882da | 1922 | long depth; |
dd2155a4 | 1923 | |
7918f24d NC |
1924 | PERL_ARGS_ASSERT_CV_CLONE; |
1925 | ||
dd2155a4 DM |
1926 | assert(!CvUNIQUE(proto)); |
1927 | ||
1b5aaca6 FC |
1928 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
1929 | * reliable. The currently-running sub is always the one we need to | |
1930 | * close over. | |
1931 | * Note that in general for formats, CvOUTSIDE != find_runcv. | |
1932 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 1933 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 1934 | */ |
71f882da | 1935 | |
5dff782d | 1936 | if (SvTYPE(proto) == SVt_PVCV) |
71f882da | 1937 | outside = find_runcv(NULL); |
5dff782d | 1938 | else { |
af41786f | 1939 | outside = CvOUTSIDE(proto); |
5dff782d | 1940 | if (CvCLONE(outside) && ! CvCLONED(outside)) { |
70794f7b FC |
1941 | CV * const runcv = find_runcv_where( |
1942 | FIND_RUNCV_root_eq, (void *)CvROOT(outside), NULL | |
1943 | ); | |
1944 | if (runcv) outside = runcv; | |
5dff782d FC |
1945 | } |
1946 | } | |
71f882da DM |
1947 | depth = CvDEPTH(outside); |
1948 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1949 | if (!depth) | |
1950 | depth = 1; | |
f2ead8b8 | 1951 | assert(CvPADLIST(outside) || SvTYPE(proto) == SVt_PVFM); |
b5c19bd7 | 1952 | |
dd2155a4 DM |
1953 | ENTER; |
1954 | SAVESPTR(PL_compcv); | |
1955 | ||
ea726b52 | 1956 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
8be227ab FC |
1957 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC |
1958 | |CVf_SLABBED); | |
dd2155a4 DM |
1959 | CvCLONED_on(cv); |
1960 | ||
bad4ae38 FC |
1961 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) |
1962 | : CvFILE(proto); | |
b3f91e91 | 1963 | CvGV_set(cv,CvGV(proto)); |
c68d9564 | 1964 | CvSTASH_set(cv, CvSTASH(proto)); |
b34c0dd4 | 1965 | OP_REFCNT_LOCK; |
dd2155a4 | 1966 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1967 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1968 | CvSTART(cv) = CvSTART(proto); |
a0d2bbd5 FC |
1969 | if (CvHASEVAL(cv)) |
1970 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
b5c19bd7 | 1971 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1972 | |
1973 | if (SvPOK(proto)) | |
ad64d0ec | 1974 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
09fb282d FC |
1975 | if (SvMAGIC(proto)) |
1976 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
dd2155a4 | 1977 | |
b7787f18 | 1978 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1979 | |
b5c19bd7 | 1980 | av_fill(PL_comppad, fpad); |
7aaef02a | 1981 | for (ix = fname; ix > 0; ix--) |
dd2155a4 DM |
1982 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
1983 | ||
dd2155a4 DM |
1984 | PL_curpad = AvARRAY(PL_comppad); |
1985 | ||
f2ead8b8 FC |
1986 | outpad = CvPADLIST(outside) |
1987 | ? AvARRAY(AvARRAY(CvPADLIST(outside))[depth]) | |
1988 | : NULL; | |
b5c19bd7 | 1989 | |
dd2155a4 | 1990 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1991 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1992 | SV *sv = NULL; | |
71f882da | 1993 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1994 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
f2ead8b8 | 1995 | /* formats may have an inactive, or even undefined, parent, |
33894c1a | 1996 | while my $x if $false can leave an active var marked as |
d1186544 | 1997 | stale. And state vars are always available */ |
f2ead8b8 FC |
1998 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
1999 | || (SvPADSTALE(sv) && !SvPAD_STATE(namesv))) { | |
a2a5de95 | 2000 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e | 2001 | "Variable \"%"SVf"\" is not available", namesv); |
a0714e2c | 2002 | sv = NULL; |
71f882da | 2003 | } |
33894c1a | 2004 | else |
f84c484e | 2005 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2006 | } |
71f882da | 2007 | if (!sv) { |
b15aece3 | 2008 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 2009 | if (sigil == '&') |
dd2155a4 | 2010 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 2011 | else if (sigil == '@') |
ad64d0ec | 2012 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2013 | else if (sigil == '%') |
ad64d0ec | 2014 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2015 | else |
561b68a9 | 2016 | sv = newSV(0); |
235cc2e3 | 2017 | SvPADMY_on(sv); |
0d3b281c DM |
2018 | /* reset the 'assign only once' flag on each state var */ |
2019 | if (SvPAD_STATE(namesv)) | |
2020 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
2021 | } |
2022 | } | |
2023 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 2024 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2025 | } |
2026 | else { | |
561b68a9 | 2027 | sv = newSV(0); |
dd2155a4 | 2028 | SvPADTMP_on(sv); |
dd2155a4 | 2029 | } |
71f882da | 2030 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2031 | } |
2032 | ||
dd2155a4 DM |
2033 | DEBUG_Xv( |
2034 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
2035 | cv_dump(outside, "Outside"); | |
2036 | cv_dump(proto, "Proto"); | |
2037 | cv_dump(cv, "To"); | |
2038 | ); | |
2039 | ||
2040 | LEAVE; | |
2041 | ||
2042 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
2043 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
2044 | * The prototype was marked as a candiate for const-ization, | |
2045 | * so try to grab the current const value, and if successful, | |
2046 | * turn into a const sub: | |
2047 | */ | |
551405c4 | 2048 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
2049 | if (const_sv) { |
2050 | SvREFCNT_dec(cv); | |
bd61b366 | 2051 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
2052 | } |
2053 | else { | |
2054 | CvCONST_off(cv); | |
2055 | } | |
dd2155a4 DM |
2056 | } |
2057 | ||
2058 | return cv; | |
2059 | } | |
2060 | ||
dd2155a4 | 2061 | /* |
cc76b5cc | 2062 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2063 | |
2064 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
2065 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
2066 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
2067 | |
2068 | =cut | |
2069 | */ | |
2070 | ||
2071 | void | |
2072 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2073 | { | |
97aff369 | 2074 | dVAR; |
dd2155a4 | 2075 | I32 ix; |
502c6561 NC |
2076 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
2077 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
2078 | SV ** const namepad = AvARRAY(comppad_name); |
2079 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2080 | |
2081 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2082 | PERL_UNUSED_ARG(old_cv); |
2083 | ||
dd2155a4 | 2084 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2085 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 2086 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 2087 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2088 | { |
e09ac076 | 2089 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
ea726b52 | 2090 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
2091 | assert(CvWEAKOUTSIDE(innercv)); |
2092 | assert(CvOUTSIDE(innercv) == old_cv); | |
2093 | CvOUTSIDE(innercv) = new_cv; | |
e09ac076 FC |
2094 | } |
2095 | else { /* format reference */ | |
2096 | SV * const rv = curpad[ix]; | |
2097 | CV *innercv; | |
2098 | if (!SvOK(rv)) continue; | |
2099 | assert(SvROK(rv)); | |
2100 | assert(SvWEAKREF(rv)); | |
2101 | innercv = (CV *)SvRV(rv); | |
2102 | assert(!CvWEAKOUTSIDE(innercv)); | |
2103 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2104 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2105 | } | |
dd2155a4 DM |
2106 | } |
2107 | } | |
2108 | } | |
2109 | ||
2110 | /* | |
cc76b5cc | 2111 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2112 | |
2113 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2114 | this depth, in which case don't bother creating a new one. Then give |
2115 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2116 | |
2117 | =cut | |
2118 | */ | |
2119 | ||
2120 | void | |
26019298 | 2121 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2122 | { |
97aff369 | 2123 | dVAR; |
7918f24d NC |
2124 | |
2125 | PERL_ARGS_ASSERT_PAD_PUSH; | |
2126 | ||
b37c2d43 | 2127 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
2128 | SV** const svp = AvARRAY(padlist); |
2129 | AV* const newpad = newAV(); | |
2130 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2131 | I32 ix = AvFILLp((const AV *)svp[1]); |
2132 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2133 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2134 | AV *av; |
2135 | ||
dd2155a4 DM |
2136 | for ( ;ix > 0; ix--) { |
2137 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 2138 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2139 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2140 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2141 | || sigil == '&') | |
2142 | { | |
dd2155a4 DM |
2143 | /* outer lexical or anon code */ |
2144 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2145 | } | |
2146 | else { /* our own lexical */ | |
26019298 AL |
2147 | SV *sv; |
2148 | if (sigil == '@') | |
ad64d0ec | 2149 | sv = MUTABLE_SV(newAV()); |
26019298 | 2150 | else if (sigil == '%') |
ad64d0ec | 2151 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2152 | else |
561b68a9 | 2153 | sv = newSV(0); |
26019298 | 2154 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2155 | SvPADMY_on(sv); |
2156 | } | |
2157 | } | |
2158 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 2159 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2160 | } |
2161 | else { | |
2162 | /* save temporaries on recursion? */ | |
561b68a9 | 2163 | SV * const sv = newSV(0); |
26019298 | 2164 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2165 | SvPADTMP_on(sv); |
2166 | } | |
2167 | } | |
26019298 | 2168 | av = newAV(); |
ad64d0ec | 2169 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2170 | AvREIFY_only(av); |
26019298 | 2171 | |
ad64d0ec | 2172 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
2173 | AvFILLp(padlist) = depth; |
2174 | } | |
2175 | } | |
b21dc031 | 2176 | |
cc76b5cc Z |
2177 | /* |
2178 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2179 | ||
2180 | Looks up the type of the lexical variable at position I<po> in the | |
2181 | currently-compiling pad. If the variable is typed, the stash of the | |
2182 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2183 | ||
2184 | =cut | |
2185 | */ | |
b21dc031 AL |
2186 | |
2187 | HV * | |
2188 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2189 | { | |
97aff369 | 2190 | dVAR; |
551405c4 | 2191 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 2192 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
2193 | return SvSTASH(*av); |
2194 | } | |
5c284bb0 | 2195 | return NULL; |
b21dc031 | 2196 | } |
66610fdd | 2197 | |
d5b1589c NC |
2198 | #if defined(USE_ITHREADS) |
2199 | ||
2200 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2201 | ||
cc76b5cc Z |
2202 | /* |
2203 | =for apidoc m|AV *|padlist_dup|AV *srcpad|CLONE_PARAMS *param | |
2204 | ||
2205 | Duplicates a pad. | |
2206 | ||
2207 | =cut | |
2208 | */ | |
2209 | ||
d5b1589c | 2210 | AV * |
cc76b5cc | 2211 | Perl_padlist_dup(pTHX_ AV *srcpad, CLONE_PARAMS *param) |
d5b1589c NC |
2212 | { |
2213 | AV *dstpad; | |
2214 | PERL_ARGS_ASSERT_PADLIST_DUP; | |
2215 | ||
2216 | if (!srcpad) | |
2217 | return NULL; | |
2218 | ||
6de654a5 NC |
2219 | if (param->flags & CLONEf_COPY_STACKS |
2220 | || SvREFCNT(AvARRAY(srcpad)[1]) > 1) { | |
6de654a5 | 2221 | dstpad = av_dup_inc(srcpad, param); |
6de654a5 NC |
2222 | assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1); |
2223 | } else { | |
2224 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2225 | to build anything other than the first level of pads. */ | |
2226 | ||
2227 | I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]); | |
2228 | AV *pad1; | |
05d04d9c | 2229 | const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0])); |
6de654a5 NC |
2230 | const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1]; |
2231 | SV **oldpad = AvARRAY(srcpad1); | |
2232 | SV **names; | |
2233 | SV **pad1a; | |
2234 | AV *args; | |
7d953ba8 FC |
2235 | /* Look for it in the table first, as the padlist may have ended up |
2236 | as an element of @DB::args (or theoretically even @_), so it may | |
104a8185 | 2237 | may have been cloned already. */ |
6de654a5 NC |
2238 | dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad); |
2239 | ||
2240 | if (dstpad) | |
7d953ba8 | 2241 | return (AV *)SvREFCNT_inc_simple_NN(dstpad); |
6de654a5 NC |
2242 | |
2243 | dstpad = newAV(); | |
2244 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
6de654a5 NC |
2245 | av_extend(dstpad, 1); |
2246 | AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param)); | |
2247 | names = AvARRAY(AvARRAY(dstpad)[0]); | |
2248 | ||
2249 | pad1 = newAV(); | |
2250 | ||
2251 | av_extend(pad1, ix); | |
2252 | AvARRAY(dstpad)[1] = MUTABLE_SV(pad1); | |
2253 | pad1a = AvARRAY(pad1); | |
2254 | AvFILLp(dstpad) = 1; | |
2255 | ||
2256 | if (ix > -1) { | |
2257 | AvFILLp(pad1) = ix; | |
2258 | ||
2259 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2260 | if (!oldpad[ix]) { |
2261 | pad1a[ix] = NULL; | |
2262 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
2263 | const char sigil = SvPVX_const(names[ix])[0]; | |
2264 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2265 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2266 | || sigil == '&') | |
2267 | { | |
2268 | /* outer lexical or anon code */ | |
2269 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2270 | } | |
2271 | else { /* our own lexical */ | |
adf8f095 NC |
2272 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2273 | /* This is a work around for how the current | |
2274 | implementation of ?{ } blocks in regexps | |
2275 | interacts with lexicals. */ | |
05d04d9c NC |
2276 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2277 | } else { | |
2278 | SV *sv; | |
2279 | ||
2280 | if (sigil == '@') | |
2281 | sv = MUTABLE_SV(newAV()); | |
2282 | else if (sigil == '%') | |
2283 | sv = MUTABLE_SV(newHV()); | |
2284 | else | |
2285 | sv = newSV(0); | |
2286 | pad1a[ix] = sv; | |
2287 | SvPADMY_on(sv); | |
2288 | } | |
2289 | } | |
2290 | } | |
2291 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
2292 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2293 | } | |
2294 | else { | |
2295 | /* save temporaries on recursion? */ | |
2296 | SV * const sv = newSV(0); | |
2297 | pad1a[ix] = sv; | |
2298 | ||
2299 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2300 | FIXTHAT before merging this branch. | |
2301 | (And I know how to) */ | |
2302 | if (SvPADMY(oldpad[ix])) | |
2303 | SvPADMY_on(sv); | |
2304 | else | |
2305 | SvPADTMP_on(sv); | |
2306 | } | |
6de654a5 NC |
2307 | } |
2308 | ||
2309 | if (oldpad[0]) { | |
2310 | args = newAV(); /* Will be @_ */ | |
2311 | AvREIFY_only(args); | |
2312 | pad1a[0] = (SV *)args; | |
2313 | } | |
2314 | } | |
2315 | } | |
d5b1589c NC |
2316 | |
2317 | return dstpad; | |
2318 | } | |
2319 | ||
cc76b5cc | 2320 | #endif /* USE_ITHREADS */ |
d5b1589c | 2321 | |
66610fdd RGS |
2322 | /* |
2323 | * Local variables: | |
2324 | * c-indentation-style: bsd | |
2325 | * c-basic-offset: 4 | |
14d04a33 | 2326 | * indent-tabs-mode: nil |
66610fdd RGS |
2327 | * End: |
2328 | * | |
14d04a33 | 2329 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2330 | */ |