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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 | 358 | if (slabbed) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(cv))); |
c4528262 NC |
359 | op_free(CvROOT(cv)); |
360 | CvROOT(cv) = NULL; | |
361 | CvSTART(cv) = NULL; | |
362 | LEAVE; | |
363 | } | |
8be227ab FC |
364 | else if (slabbed && CvSTART(cv)) { |
365 | ENTER; | |
366 | PAD_SAVE_SETNULLPAD(); | |
367 | ||
368 | /* discard any leaked ops */ | |
369 | opslab_force_free((OPSLAB *)CvSTART(cv)); | |
370 | CvSTART(cv) = NULL; | |
371 | ||
372 | LEAVE; | |
373 | } | |
7aef8e5b | 374 | #ifdef DEBUGGING |
8be227ab | 375 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv); |
8be227ab | 376 | #endif |
c4528262 | 377 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 378 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
c4528262 NC |
379 | CvGV_set(cv, NULL); |
380 | ||
c2736fce NC |
381 | /* This statement and the subsequence if block was pad_undef(). */ |
382 | pad_peg("pad_undef"); | |
383 | ||
384 | if (padlist && !SvIS_FREED(padlist) /* may be during global destruction */ | |
385 | ) { | |
386 | I32 ix; | |
387 | ||
388 | /* Free the padlist associated with a CV. | |
389 | If parts of it happen to be current, we null the relevant PL_*pad* | |
390 | global vars so that we don't have any dangling references left. | |
391 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
392 | subs to the outer of this cv. */ | |
393 | ||
394 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
395 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
396 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
397 | ); | |
398 | ||
399 | /* detach any '&' anon children in the pad; if afterwards they | |
400 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
401 | * bypassing us. */ | |
402 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
403 | * children, or integrate this loop with general cleanup */ | |
404 | ||
405 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
406 | CV * const outercv = CvOUTSIDE(cv); | |
407 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
408 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); | |
409 | SV ** const namepad = AvARRAY(comppad_name); | |
410 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
411 | SV ** const curpad = AvARRAY(comppad); | |
412 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
413 | SV * const namesv = namepad[ix]; | |
414 | if (namesv && namesv != &PL_sv_undef | |
415 | && *SvPVX_const(namesv) == '&') | |
416 | { | |
417 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
418 | U32 inner_rc = SvREFCNT(innercv); | |
419 | assert(inner_rc); | |
e09ac076 | 420 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
421 | namepad[ix] = NULL; |
422 | SvREFCNT_dec(namesv); | |
423 | ||
424 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
425 | curpad[ix] = NULL; | |
426 | SvREFCNT_dec(innercv); | |
427 | inner_rc--; | |
428 | } | |
429 | ||
430 | /* in use, not just a prototype */ | |
431 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
432 | assert(CvWEAKOUTSIDE(innercv)); | |
433 | /* don't relink to grandfather if he's being freed */ | |
434 | if (outercv && SvREFCNT(outercv)) { | |
435 | CvWEAKOUTSIDE_off(innercv); | |
436 | CvOUTSIDE(innercv) = outercv; | |
437 | CvOUTSIDE_SEQ(innercv) = seq; | |
438 | SvREFCNT_inc_simple_void_NN(outercv); | |
439 | } | |
440 | else { | |
441 | CvOUTSIDE(innercv) = NULL; | |
442 | } | |
443 | } | |
444 | } | |
445 | } | |
446 | } | |
447 | ||
448 | ix = AvFILLp(padlist); | |
aa2f79cf | 449 | while (ix > 0) { |
c2736fce NC |
450 | SV* const sv = AvARRAY(padlist)[ix--]; |
451 | if (sv) { | |
aa2f79cf | 452 | if (sv == (const SV *)PL_comppad) { |
c2736fce NC |
453 | PL_comppad = NULL; |
454 | PL_curpad = NULL; | |
455 | } | |
aa2f79cf | 456 | SvREFCNT_dec(sv); |
c2736fce | 457 | } |
aa2f79cf NC |
458 | } |
459 | { | |
460 | SV *const sv = AvARRAY(padlist)[0]; | |
461 | if (sv == (const SV *)PL_comppad_name) | |
462 | PL_comppad_name = NULL; | |
c2736fce NC |
463 | SvREFCNT_dec(sv); |
464 | } | |
7d953ba8 | 465 | AvREAL_off(CvPADLIST(cv)); |
c2736fce NC |
466 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); |
467 | CvPADLIST(cv) = NULL; | |
468 | } | |
469 | ||
c4528262 NC |
470 | |
471 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
472 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
473 | if (!CvWEAKOUTSIDE(cv)) | |
474 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
475 | CvOUTSIDE(cv) = NULL; | |
476 | } | |
477 | if (CvCONST(cv)) { | |
478 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
479 | CvCONST_off(cv); | |
480 | } | |
481 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
482 | CvXSUB(cv) = NULL; | |
483 | } | |
484 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
2c374370 FC |
485 | * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses |
486 | * to choose an error message */ | |
487 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON); | |
c4528262 | 488 | } |
dd2155a4 | 489 | |
50dc2bd3 FC |
490 | /* |
491 | =for apidoc cv_forget_slab | |
492 | ||
493 | When a CV has a reference count on its slab (CvSLABBED), it is responsible | |
494 | for making sure it is freed. (Hence, no two CVs should ever have a | |
495 | reference count on the same slab.) The CV only needs to reference the slab | |
496 | during compilation. Once it is compiled and CvROOT attached, it has | |
497 | finished its job, so it can forget the slab. | |
498 | ||
499 | =cut | |
500 | */ | |
501 | ||
8be227ab FC |
502 | void |
503 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
504 | { | |
505 | const bool slabbed = !!CvSLABBED(cv); | |
7aef8e5b | 506 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 507 | OPSLAB *slab = NULL; |
7aef8e5b | 508 | #endif |
8be227ab FC |
509 | |
510 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
511 | ||
512 | if (!slabbed) return; | |
513 | ||
514 | CvSLABBED_off(cv); | |
515 | ||
7aef8e5b | 516 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f FC |
517 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
518 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 519 | #else |
8be227ab FC |
520 | if (CvROOT(cv)) OpslabREFCNT_dec(OpSLAB(CvROOT(cv))); |
521 | else if (CvSTART(cv)) OpslabREFCNT_dec((OPSLAB *)CvSTART(cv)); | |
7aef8e5b FC |
522 | #endif |
523 | #ifdef DEBUGGING | |
8be227ab | 524 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", cv); |
7aef8e5b | 525 | #endif |
3107b51f | 526 | |
7aef8e5b | 527 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f FC |
528 | if (slab) { |
529 | size_t refcnt; | |
530 | refcnt = slab->opslab_refcnt; | |
531 | OpslabREFCNT_dec(slab); | |
532 | if (refcnt > 1) Slab_to_ro(slab); | |
533 | } | |
8be227ab | 534 | #endif |
7aef8e5b | 535 | } |
8be227ab | 536 | |
cc76b5cc Z |
537 | /* |
538 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
539 | ||
1a115e49 FC |
540 | Allocates a place in the currently-compiling |
541 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
542 | then stores a name for that entry. I<namesv> is adopted and becomes the |
543 | name entry; it must already contain the name string and be sufficiently | |
544 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
545 | added to I<namesv>. None of the other |
546 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
547 | is done. Returns the offset of the allocated pad slot. |
548 | ||
549 | =cut | |
550 | */ | |
551 | ||
3291825f | 552 | static PADOFFSET |
cc76b5cc | 553 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f NC |
554 | { |
555 | dVAR; | |
556 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); | |
557 | ||
cc76b5cc | 558 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 559 | |
cc76b5cc | 560 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
561 | |
562 | if (typestash) { | |
563 | assert(SvTYPE(namesv) == SVt_PVMG); | |
564 | SvPAD_TYPED_on(namesv); | |
565 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
566 | } | |
567 | if (ourstash) { | |
568 | SvPAD_OUR_on(namesv); | |
569 | SvOURSTASH_set(namesv, ourstash); | |
570 | SvREFCNT_inc_simple_void_NN(ourstash); | |
571 | } | |
59cfed7d | 572 | else if (flags & padadd_STATE) { |
3291825f NC |
573 | SvPAD_STATE_on(namesv); |
574 | } | |
575 | ||
576 | av_store(PL_comppad_name, offset, namesv); | |
577 | return offset; | |
578 | } | |
579 | ||
dd2155a4 | 580 | /* |
cc76b5cc | 581 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 582 | |
cc76b5cc Z |
583 | Allocates a place in the currently-compiling pad for a named lexical |
584 | variable. Stores the name and other metadata in the name part of the | |
585 | pad, and makes preparations to manage the variable's lexical scoping. | |
586 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 587 | |
cc76b5cc Z |
588 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
589 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
590 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
591 | to a package variable, and this identifies the package. The following | |
592 | flags can be OR'ed together: | |
593 | ||
594 | padadd_OUR redundantly specifies if it's a package var | |
595 | padadd_STATE variable will retain value persistently | |
596 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
597 | |
598 | =cut | |
599 | */ | |
600 | ||
dd2155a4 | 601 | PADOFFSET |
cc76b5cc Z |
602 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
603 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 604 | { |
97aff369 | 605 | dVAR; |
3291825f | 606 | PADOFFSET offset; |
cca43f78 | 607 | SV *namesv; |
e8b34487 | 608 | bool is_utf8; |
dd2155a4 | 609 | |
cc76b5cc | 610 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 611 | |
2435e5d3 | 612 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 613 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
614 | (UV)flags); |
615 | ||
616 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
617 | |
618 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
619 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
620 | } | |
621 | ||
0727928e BF |
622 | sv_setpvn(namesv, namepv, namelen); |
623 | ||
e8b34487 BF |
624 | if (is_utf8) { |
625 | flags |= padadd_UTF8_NAME; | |
626 | SvUTF8_on(namesv); | |
627 | } | |
628 | else | |
629 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 630 | |
59cfed7d | 631 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
2d12d04f | 632 | /* check for duplicate declaration */ |
59cfed7d | 633 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
2d12d04f NC |
634 | } |
635 | ||
2435e5d3 | 636 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
637 | |
638 | /* not yet introduced */ | |
2df5bdd7 DM |
639 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
640 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
641 | |
642 | if (!PL_min_intro_pending) | |
643 | PL_min_intro_pending = offset; | |
644 | PL_max_intro_pending = offset; | |
645 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
646 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
647 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 648 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 649 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 650 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 NC |
651 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
652 | assert(SvPADMY(PL_curpad[offset])); | |
3291825f NC |
653 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
654 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
655 | (long)offset, SvPVX(namesv), |
656 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
657 | |
658 | return offset; | |
659 | } | |
660 | ||
cc76b5cc Z |
661 | /* |
662 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 663 | |
cc76b5cc Z |
664 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
665 | instead of a string/length pair. | |
dd2155a4 | 666 | |
cc76b5cc Z |
667 | =cut |
668 | */ | |
669 | ||
670 | PADOFFSET | |
671 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 672 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
673 | { |
674 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
675 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
676 | } | |
dd2155a4 DM |
677 | |
678 | /* | |
cc76b5cc | 679 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 680 | |
cc76b5cc Z |
681 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
682 | of an SV instead of a string/length pair. | |
683 | ||
684 | =cut | |
685 | */ | |
686 | ||
687 | PADOFFSET | |
688 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
689 | { | |
690 | char *namepv; | |
691 | STRLEN namelen; | |
692 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
693 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
694 | if (SvUTF8(name)) |
695 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
696 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
697 | } | |
698 | ||
699 | /* | |
700 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
701 | ||
702 | Allocates a place in the currently-compiling pad, | |
703 | returning the offset of the allocated pad slot. | |
704 | No name is initially attached to the pad slot. | |
705 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
706 | which will be set in the value SV for the allocated pad entry: | |
707 | ||
708 | SVs_PADMY named lexical variable ("my", "our", "state") | |
709 | SVs_PADTMP unnamed temporary store | |
710 | ||
711 | I<optype> should be an opcode indicating the type of operation that the | |
712 | pad entry is to support. This doesn't affect operational semantics, | |
713 | but is used for debugging. | |
dd2155a4 DM |
714 | |
715 | =cut | |
716 | */ | |
717 | ||
718 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
719 | * or at least rationalise ??? */ | |
dd2155a4 DM |
720 | |
721 | PADOFFSET | |
722 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
723 | { | |
97aff369 | 724 | dVAR; |
dd2155a4 DM |
725 | SV *sv; |
726 | I32 retval; | |
727 | ||
6136c704 | 728 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
729 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
730 | ||
dd2155a4 | 731 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
732 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
733 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
734 | if (PL_pad_reset_pending) |
735 | pad_reset(); | |
736 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 737 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 738 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
739 | retval = AvFILLp(PL_comppad); |
740 | } | |
741 | else { | |
cc76b5cc Z |
742 | /* For a tmp, scan the pad from PL_padix upwards |
743 | * for a slot which has no name and no active value. | |
744 | */ | |
551405c4 | 745 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 746 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
747 | for (;;) { |
748 | /* | |
749 | * "foreach" index vars temporarily become aliases to non-"my" | |
750 | * values. Thus we must skip, not just pad values that are | |
751 | * marked as current pad values, but also those with names. | |
752 | */ | |
753 | /* HVDS why copy to sv here? we don't seem to use it */ | |
754 | if (++PL_padix <= names_fill && | |
755 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
756 | continue; | |
757 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
758 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
759 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
760 | break; | |
761 | } | |
762 | retval = PL_padix; | |
763 | } | |
764 | SvFLAGS(sv) |= tmptype; | |
765 | PL_curpad = AvARRAY(PL_comppad); | |
766 | ||
767 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
768 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
769 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
770 | PL_op_name[optype])); | |
fd0854ff DM |
771 | #ifdef DEBUG_LEAKING_SCALARS |
772 | sv->sv_debug_optype = optype; | |
773 | sv->sv_debug_inpad = 1; | |
fd0854ff | 774 | #endif |
a212c8b5 | 775 | return (PADOFFSET)retval; |
dd2155a4 DM |
776 | } |
777 | ||
778 | /* | |
cc76b5cc | 779 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 780 | |
cc76b5cc Z |
781 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
782 | for an anonymous function that is lexically scoped inside the | |
783 | currently-compiling function. | |
784 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
785 | to the outer scope is weakened to avoid a reference loop. | |
786 | ||
787 | I<optype> should be an opcode indicating the type of operation that the | |
788 | pad entry is to support. This doesn't affect operational semantics, | |
789 | but is used for debugging. | |
dd2155a4 DM |
790 | |
791 | =cut | |
792 | */ | |
793 | ||
794 | PADOFFSET | |
cc76b5cc | 795 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 | 796 | { |
97aff369 | 797 | dVAR; |
dd2155a4 | 798 | PADOFFSET ix; |
b9f83d2f | 799 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
800 | |
801 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
802 | ||
1dba731d | 803 | pad_peg("add_anon"); |
76f68e9b | 804 | sv_setpvs(name, "&"); |
0d311cdb DM |
805 | /* These two aren't used; just make sure they're not equal to |
806 | * PERL_PADSEQ_INTRO */ | |
807 | COP_SEQ_RANGE_LOW_set(name, 0); | |
808 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 809 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 810 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 811 | /* XXX DAPM use PL_curpad[] ? */ |
e09ac076 FC |
812 | if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func)) |
813 | av_store(PL_comppad, ix, (SV*)func); | |
814 | else { | |
815 | SV *rv = newRV_inc((SV *)func); | |
816 | sv_rvweaken(rv); | |
817 | assert (SvTYPE(func) == SVt_PVFM); | |
818 | av_store(PL_comppad, ix, rv); | |
819 | } | |
cc76b5cc | 820 | SvPADMY_on((SV*)func); |
7dafbf52 DM |
821 | |
822 | /* to avoid ref loops, we never have parent + child referencing each | |
823 | * other simultaneously */ | |
e09ac076 | 824 | if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) { |
cc76b5cc Z |
825 | assert(!CvWEAKOUTSIDE(func)); |
826 | CvWEAKOUTSIDE_on(func); | |
827 | SvREFCNT_dec(CvOUTSIDE(func)); | |
7dafbf52 | 828 | } |
dd2155a4 DM |
829 | return ix; |
830 | } | |
831 | ||
dd2155a4 | 832 | /* |
13087dd8 | 833 | =for apidoc pad_check_dup |
dd2155a4 DM |
834 | |
835 | Check for duplicate declarations: report any of: | |
13087dd8 | 836 | |
dd2155a4 | 837 | * a my in the current scope with the same name; |
13087dd8 FC |
838 | * an our (anywhere in the pad) with the same name and the |
839 | same stash as C<ourstash> | |
840 | ||
841 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
842 | |
843 | =cut | |
844 | */ | |
845 | ||
20381b50 | 846 | STATIC void |
cc76b5cc | 847 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 848 | { |
97aff369 | 849 | dVAR; |
53c1dcc0 | 850 | SV **svp; |
dd2155a4 | 851 | PADOFFSET top, off; |
59cfed7d | 852 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 853 | |
7918f24d NC |
854 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
855 | ||
f3548bdc | 856 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 857 | |
59cfed7d | 858 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 859 | |
041457d9 | 860 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
861 | return; /* nothing to check */ |
862 | ||
863 | svp = AvARRAY(PL_comppad_name); | |
864 | top = AvFILLp(PL_comppad_name); | |
865 | /* check the current scope */ | |
866 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
867 | * type ? */ | |
868 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
869 | SV * const sv = svp[off]; |
870 | if (sv | |
dd2155a4 | 871 | && sv != &PL_sv_undef |
ee6cee0c | 872 | && !SvFAKE(sv) |
0d311cdb DM |
873 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
874 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 875 | && sv_eq(name, sv)) |
dd2155a4 | 876 | { |
00b1698f | 877 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 878 | break; /* "our" masking "our" */ |
dd2155a4 | 879 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 | 880 | "\"%s\" variable %"SVf" masks earlier declaration in same %s", |
12bd6ede | 881 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
c541b9b4 | 882 | sv, |
2df5bdd7 DM |
883 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
884 | ? "scope" : "statement")); | |
dd2155a4 DM |
885 | --off; |
886 | break; | |
887 | } | |
888 | } | |
889 | /* check the rest of the pad */ | |
890 | if (is_our) { | |
61c5492a | 891 | while (off > 0) { |
53c1dcc0 AL |
892 | SV * const sv = svp[off]; |
893 | if (sv | |
dd2155a4 | 894 | && sv != &PL_sv_undef |
ee6cee0c | 895 | && !SvFAKE(sv) |
0d311cdb DM |
896 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
897 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 898 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 899 | && sv_eq(name, sv)) |
dd2155a4 DM |
900 | { |
901 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c541b9b4 | 902 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 | 903 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
904 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
905 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
906 | break; |
907 | } | |
61c5492a NC |
908 | --off; |
909 | } | |
dd2155a4 DM |
910 | } |
911 | } | |
912 | ||
913 | ||
dd2155a4 | 914 | /* |
cc76b5cc | 915 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 916 | |
cc76b5cc Z |
917 | Given the name of a lexical variable, find its position in the |
918 | currently-compiling pad. | |
919 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
920 | I<flags> is reserved and must be zero. | |
921 | If it is not in the current pad but appears in the pad of any lexically | |
922 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
923 | Returns the offset in the current pad, | |
924 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
925 | |
926 | =cut | |
927 | */ | |
928 | ||
929 | PADOFFSET | |
cc76b5cc | 930 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 931 | { |
97aff369 | 932 | dVAR; |
b5c19bd7 DM |
933 | SV *out_sv; |
934 | int out_flags; | |
929a0744 | 935 | I32 offset; |
e1ec3a88 | 936 | const AV *nameav; |
929a0744 | 937 | SV **name_svp; |
dd2155a4 | 938 | |
cc76b5cc | 939 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 940 | |
cc76b5cc | 941 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 942 | |
2435e5d3 | 943 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 944 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
945 | (UV)flags); |
946 | ||
e8b34487 BF |
947 | if (flags & padadd_UTF8_NAME) { |
948 | bool is_utf8 = TRUE; | |
949 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
950 | ||
951 | if (is_utf8) | |
952 | flags |= padadd_UTF8_NAME; | |
953 | else | |
954 | flags &= ~padadd_UTF8_NAME; | |
955 | } | |
956 | ||
fbb889c8 BF |
957 | offset = pad_findlex(namepv, namelen, flags, |
958 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 959 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
960 | return offset; |
961 | ||
962 | /* look for an our that's being introduced; this allows | |
963 | * our $foo = 0 unless defined $foo; | |
964 | * to not give a warning. (Yes, this is a hack) */ | |
965 | ||
502c6561 | 966 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 DM |
967 | name_svp = AvARRAY(nameav); |
968 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 969 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
970 | if (namesv && namesv != &PL_sv_undef |
971 | && !SvFAKE(namesv) | |
00b1698f | 972 | && (SvPAD_OUR(namesv)) |
cc76b5cc | 973 | && SvCUR(namesv) == namelen |
e8b34487 BF |
974 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
975 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 976 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
977 | ) |
978 | return offset; | |
979 | } | |
980 | return NOT_IN_PAD; | |
dd2155a4 DM |
981 | } |
982 | ||
e1f795dc | 983 | /* |
cc76b5cc Z |
984 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
985 | ||
986 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
987 | instead of a string/length pair. | |
988 | ||
989 | =cut | |
990 | */ | |
991 | ||
992 | PADOFFSET | |
993 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
994 | { | |
995 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
996 | return pad_findmy_pvn(name, strlen(name), flags); | |
997 | } | |
998 | ||
999 | /* | |
1000 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
1001 | ||
1002 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
1003 | of an SV instead of a string/length pair. | |
1004 | ||
1005 | =cut | |
1006 | */ | |
1007 | ||
1008 | PADOFFSET | |
1009 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1010 | { | |
1011 | char *namepv; | |
1012 | STRLEN namelen; | |
1013 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
1014 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
1015 | if (SvUTF8(name)) |
1016 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
1017 | return pad_findmy_pvn(namepv, namelen, flags); |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1022 | ||
1023 | Find the position of the lexical C<$_> in the pad of the | |
1024 | currently-executing function. Returns the offset in the current pad, | |
1025 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1026 | the global one should be used instead). | |
1027 | L</find_rundefsv> is likely to be more convenient. | |
1028 | ||
1029 | =cut | |
1030 | */ | |
e1f795dc RGS |
1031 | |
1032 | PADOFFSET | |
29289021 | 1033 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 1034 | { |
97aff369 | 1035 | dVAR; |
e1f795dc RGS |
1036 | SV *out_sv; |
1037 | int out_flags; | |
fbb889c8 | 1038 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 1039 | NULL, &out_sv, &out_flags); |
e1f795dc | 1040 | } |
dd2155a4 | 1041 | |
dd2155a4 | 1042 | /* |
cc76b5cc Z |
1043 | =for apidoc Am|SV *|find_rundefsv |
1044 | ||
1045 | Find and return the variable that is named C<$_> in the lexical scope | |
1046 | of the currently-executing function. This may be a lexical C<$_>, | |
1047 | or will otherwise be the global one. | |
1048 | ||
1049 | =cut | |
1050 | */ | |
789bd863 VP |
1051 | |
1052 | SV * | |
1053 | Perl_find_rundefsv(pTHX) | |
1054 | { | |
1055 | SV *namesv; | |
1056 | int flags; | |
1057 | PADOFFSET po; | |
1058 | ||
fbb889c8 | 1059 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
1060 | NULL, &namesv, &flags); |
1061 | ||
1979170b | 1062 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
1063 | return DEFSV; |
1064 | ||
1065 | return PAD_SVl(po); | |
1066 | } | |
1067 | ||
c086f97a FC |
1068 | SV * |
1069 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1070 | { | |
1071 | SV *namesv; | |
1072 | int flags; | |
1073 | PADOFFSET po; | |
1074 | ||
1075 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1076 | ||
1077 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1078 | NULL, &namesv, &flags); | |
1079 | ||
1080 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1081 | return DEFSV; | |
1082 | ||
1083 | return AvARRAY((PAD*) (AvARRAY(CvPADLIST(cv))[CvDEPTH(cv)]))[po]; | |
1084 | } | |
1085 | ||
789bd863 | 1086 | /* |
fbb889c8 | 1087 | =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 |
1088 | |
1089 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
1090 | in the inner pads if it's found in an outer one. |
1091 | ||
1092 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1093 | cv is the CV in which to start the search, and seq is the current cop_seq | |
1094 | to match against. If warn is true, print appropriate warnings. The out_* | |
1095 | vars return values, and so are pointers to where the returned values | |
1096 | should be stored. out_capture, if non-null, requests that the innermost | |
1097 | instance of the lexical is captured; out_name_sv is set to the innermost | |
1098 | matched namesv or fake namesv; out_flags returns the flags normally | |
1099 | associated with the IVX field of a fake namesv. | |
1100 | ||
1101 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
1102 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 1103 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1104 | the parent pad. |
dd2155a4 DM |
1105 | |
1106 | =cut | |
1107 | */ | |
1108 | ||
b5c19bd7 DM |
1109 | /* the CV has finished being compiled. This is not a sufficient test for |
1110 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1111 | #define CvCOMPILED(cv) CvROOT(cv) | |
1112 | ||
71f882da DM |
1113 | /* the CV does late binding of its lexicals */ |
1114 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
1115 | ||
b5c19bd7 | 1116 | |
dd2155a4 | 1117 | STATIC PADOFFSET |
fbb889c8 | 1118 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1119 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1120 | { |
97aff369 | 1121 | dVAR; |
b5c19bd7 DM |
1122 | I32 offset, new_offset; |
1123 | SV *new_capture; | |
1124 | SV **new_capturep; | |
b64e5050 | 1125 | const AV * const padlist = CvPADLIST(cv); |
7ef30830 | 1126 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1127 | |
7918f24d NC |
1128 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1129 | ||
7ef30830 | 1130 | if (flags & ~(padadd_UTF8_NAME|padadd_STALEOK)) |
2435e5d3 BF |
1131 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1132 | (UV)flags); | |
7ef30830 | 1133 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
2435e5d3 | 1134 | |
b5c19bd7 | 1135 | *out_flags = 0; |
a3985cdc | 1136 | |
b5c19bd7 | 1137 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1138 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1139 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1140 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1141 | |
b5c19bd7 | 1142 | /* first, search this pad */ |
dd2155a4 | 1143 | |
b5c19bd7 DM |
1144 | if (padlist) { /* not an undef CV */ |
1145 | I32 fake_offset = 0; | |
502c6561 | 1146 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 1147 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1148 | |
b5c19bd7 | 1149 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 1150 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 1151 | if (namesv && namesv != &PL_sv_undef |
cc76b5cc | 1152 | && SvCUR(namesv) == namelen |
e8b34487 BF |
1153 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1154 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1155 | { |
6012dc80 | 1156 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1157 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1158 | continue; |
1159 | } | |
1160 | /* is seq within the range _LOW to _HIGH ? | |
1161 | * This is complicated by the fact that PL_cop_seqmax | |
1162 | * may have wrapped around at some point */ | |
1163 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1164 | continue; /* not yet introduced */ | |
1165 | ||
1166 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1167 | /* in compiling scope */ | |
1168 | if ( | |
1169 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1170 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1171 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1172 | ) | |
1173 | break; | |
1174 | } | |
1175 | else if ( | |
1176 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1177 | ? | |
1178 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1179 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1180 | ||
1181 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1182 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1183 | ) | |
1184 | break; | |
ee6cee0c DM |
1185 | } |
1186 | } | |
1187 | ||
b5c19bd7 DM |
1188 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1189 | if (offset > 0) { /* not fake */ | |
1190 | fake_offset = 0; | |
1191 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1192 | ||
1193 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1194 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1195 | * ideally, we should detect my's declared within loops | |
1196 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1197 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1198 | * lexes as not multi as viewed from evals. */ |
1199 | ||
1200 | *out_flags = CvANON(cv) ? | |
1201 | PAD_FAKELEX_ANON : | |
1202 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1203 | ? PAD_FAKELEX_MULTI : 0; | |
1204 | ||
1205 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1206 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1207 | PTR2UV(cv), (long)offset, | |
1208 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1209 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1210 | } |
1211 | else { /* fake match */ | |
1212 | offset = fake_offset; | |
1213 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1214 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1215 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1216 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1217 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1218 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1219 | )); |
1220 | } | |
dd2155a4 | 1221 | |
b5c19bd7 | 1222 | /* return the lex? */ |
dd2155a4 | 1223 | |
b5c19bd7 | 1224 | if (out_capture) { |
dd2155a4 | 1225 | |
b5c19bd7 | 1226 | /* our ? */ |
00b1698f | 1227 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1228 | *out_capture = NULL; |
b5c19bd7 DM |
1229 | return offset; |
1230 | } | |
ee6cee0c | 1231 | |
b5c19bd7 DM |
1232 | /* trying to capture from an anon prototype? */ |
1233 | if (CvCOMPILED(cv) | |
1234 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1235 | : *out_flags & PAD_FAKELEX_ANON) | |
1236 | { | |
a2a5de95 NC |
1237 | if (warn) |
1238 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1239 | "Variable \"%"SVf"\" is not available", |
1240 | newSVpvn_flags(namepv, namelen, | |
1241 | SVs_TEMP | | |
1242 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1243 | ||
a0714e2c | 1244 | *out_capture = NULL; |
b5c19bd7 | 1245 | } |
ee6cee0c | 1246 | |
b5c19bd7 DM |
1247 | /* real value */ |
1248 | else { | |
1249 | int newwarn = warn; | |
1250 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1251 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1252 | && warn && ckWARN(WARN_CLOSURE)) { |
1253 | newwarn = 0; | |
1254 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e BF |
1255 | "Variable \"%"SVf"\" will not stay shared", |
1256 | newSVpvn_flags(namepv, namelen, | |
1257 | SVs_TEMP | | |
1258 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
b5c19bd7 | 1259 | } |
dd2155a4 | 1260 | |
b5c19bd7 DM |
1261 | if (fake_offset && CvANON(cv) |
1262 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1263 | { | |
1264 | SV *n; | |
1265 | /* not yet caught - look further up */ | |
1266 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1267 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1268 | PTR2UV(cv))); | |
1269 | n = *out_name_sv; | |
fbb889c8 | 1270 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1271 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1272 | newwarn, out_capture, out_name_sv, out_flags); |
1273 | *out_name_sv = n; | |
1274 | return offset; | |
dd2155a4 | 1275 | } |
b5c19bd7 | 1276 | |
502c6561 NC |
1277 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
1278 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
1279 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1280 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1281 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1282 | |
d1186544 | 1283 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1284 | && (!CvDEPTH(cv) || !staleok) |
d1186544 DM |
1285 | && !SvPAD_STATE(name_svp[offset])) |
1286 | { | |
a2a5de95 | 1287 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e BF |
1288 | "Variable \"%"SVf"\" is not available", |
1289 | newSVpvn_flags(namepv, namelen, | |
1290 | SVs_TEMP | | |
1291 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1292 | *out_capture = NULL; |
dd2155a4 DM |
1293 | } |
1294 | } | |
b5c19bd7 | 1295 | if (!*out_capture) { |
cc76b5cc | 1296 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1297 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1298 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1299 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
1300 | else |
1301 | *out_capture = sv_newmortal(); | |
1302 | } | |
dd2155a4 | 1303 | } |
b5c19bd7 DM |
1304 | |
1305 | return offset; | |
ee6cee0c | 1306 | } |
b5c19bd7 DM |
1307 | } |
1308 | ||
1309 | /* it's not in this pad - try above */ | |
1310 | ||
1311 | if (!CvOUTSIDE(cv)) | |
1312 | return NOT_IN_PAD; | |
9f7d9405 | 1313 | |
b5c19bd7 | 1314 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1315 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1316 | new_capturep = out_capture ? out_capture : |
4608196e | 1317 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1318 | |
7ef30830 FC |
1319 | offset = pad_findlex(namepv, namelen, |
1320 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1321 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
b5c19bd7 | 1322 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1323 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1324 | return NOT_IN_PAD; |
9f7d9405 | 1325 | |
b5c19bd7 DM |
1326 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1327 | ||
1328 | /* don't add new fake entries (via eval) to CVs that we have already | |
1329 | * finished compiling, or to undef CVs */ | |
1330 | if (CvCOMPILED(cv) || !padlist) | |
1331 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1332 | ||
1333 | { | |
3291825f | 1334 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1335 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1336 | "good" and only copying flag bits and pointers that it understands. |
1337 | */ | |
1338 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1339 | AV * const ocomppad_name = PL_comppad_name; |
1340 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
1341 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1342 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
1343 | PL_curpad = AvARRAY(PL_comppad); |
1344 | ||
3291825f | 1345 | new_offset |
cc76b5cc | 1346 | = pad_alloc_name(new_namesv, |
59cfed7d | 1347 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1348 | SvPAD_TYPED(*out_name_sv) |
1349 | ? SvSTASH(*out_name_sv) : NULL, | |
1350 | SvOURSTASH(*out_name_sv) | |
1351 | ); | |
1352 | ||
1353 | SvFAKE_on(new_namesv); | |
1354 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1355 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1356 | (long)new_offset, | |
1357 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1358 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1359 | |
809abb02 | 1360 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1361 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1362 | NOOP; /* do nothing */ |
b5c19bd7 | 1363 | } |
71f882da | 1364 | else if (CvLATE(cv)) { |
b5c19bd7 | 1365 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1366 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1367 | CvCLONE_on(cv); |
1368 | } | |
1369 | else { | |
1370 | /* immediate creation - capture outer value right now */ | |
1371 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
1372 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1373 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1374 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1375 | } |
b5c19bd7 | 1376 | *out_name_sv = new_namesv; |
809abb02 | 1377 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1378 | |
1379 | PL_comppad_name = ocomppad_name; | |
1380 | PL_comppad = ocomppad; | |
4608196e | 1381 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1382 | } |
b5c19bd7 | 1383 | return new_offset; |
dd2155a4 DM |
1384 | } |
1385 | ||
fb8a9836 | 1386 | #ifdef DEBUGGING |
cc76b5cc | 1387 | |
dd2155a4 | 1388 | /* |
cc76b5cc | 1389 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1390 | |
cc76b5cc | 1391 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1392 | Use macro PAD_SV instead of calling this function directly. |
1393 | ||
1394 | =cut | |
1395 | */ | |
1396 | ||
dd2155a4 DM |
1397 | SV * |
1398 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1399 | { | |
97aff369 | 1400 | dVAR; |
f3548bdc | 1401 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1402 | |
dd2155a4 DM |
1403 | if (!po) |
1404 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1405 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1406 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1407 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1408 | ); |
1409 | return PL_curpad[po]; | |
1410 | } | |
1411 | ||
dd2155a4 | 1412 | /* |
cc76b5cc | 1413 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1414 | |
cc76b5cc | 1415 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1416 | Use the macro PAD_SETSV() rather than calling this function directly. |
1417 | ||
1418 | =cut | |
1419 | */ | |
1420 | ||
dd2155a4 DM |
1421 | void |
1422 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1423 | { | |
97aff369 | 1424 | dVAR; |
7918f24d NC |
1425 | |
1426 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1427 | ||
f3548bdc | 1428 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1429 | |
1430 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1431 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1432 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1433 | ); |
1434 | PL_curpad[po] = sv; | |
1435 | } | |
dd2155a4 | 1436 | |
cc76b5cc | 1437 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1438 | |
1439 | /* | |
cc76b5cc | 1440 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 DM |
1441 | |
1442 | Update the pad compilation state variables on entry to a new block | |
1443 | ||
1444 | =cut | |
1445 | */ | |
1446 | ||
1447 | /* XXX DAPM perhaps: | |
1448 | * - integrate this in general state-saving routine ??? | |
1449 | * - combine with the state-saving going on in pad_new ??? | |
1450 | * - introduce a new SAVE type that does all this in one go ? | |
1451 | */ | |
1452 | ||
1453 | void | |
1454 | Perl_pad_block_start(pTHX_ int full) | |
1455 | { | |
97aff369 | 1456 | dVAR; |
f3548bdc | 1457 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1458 | SAVEI32(PL_comppad_name_floor); |
1459 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1460 | if (full) | |
1461 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1462 | if (PL_comppad_name_floor < 0) | |
1463 | PL_comppad_name_floor = 0; | |
1464 | SAVEI32(PL_min_intro_pending); | |
1465 | SAVEI32(PL_max_intro_pending); | |
1466 | PL_min_intro_pending = 0; | |
1467 | SAVEI32(PL_comppad_name_fill); | |
1468 | SAVEI32(PL_padix_floor); | |
1469 | PL_padix_floor = PL_padix; | |
1470 | PL_pad_reset_pending = FALSE; | |
1471 | } | |
1472 | ||
dd2155a4 | 1473 | /* |
cc76b5cc | 1474 | =for apidoc m|U32|intro_my |
dd2155a4 | 1475 | |
bf954566 FC |
1476 | "Introduce" my variables to visible status. This is called during parsing |
1477 | at the end of each statement to make lexical variables visible to | |
1478 | subsequent statements. | |
dd2155a4 DM |
1479 | |
1480 | =cut | |
1481 | */ | |
1482 | ||
1483 | U32 | |
1484 | Perl_intro_my(pTHX) | |
1485 | { | |
97aff369 | 1486 | dVAR; |
dd2155a4 | 1487 | SV **svp; |
dd2155a4 | 1488 | I32 i; |
6012dc80 | 1489 | U32 seq; |
dd2155a4 | 1490 | |
f3548bdc | 1491 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1492 | if (! PL_min_intro_pending) |
1493 | return PL_cop_seqmax; | |
1494 | ||
1495 | svp = AvARRAY(PL_comppad_name); | |
1496 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1497 | SV * const sv = svp[i]; |
1498 | ||
0d311cdb DM |
1499 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1500 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) | |
1501 | { | |
2df5bdd7 | 1502 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1503 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1504 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1505 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1506 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1507 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1508 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1509 | ); |
1510 | } | |
1511 | } | |
6012dc80 DM |
1512 | seq = PL_cop_seqmax; |
1513 | PL_cop_seqmax++; | |
1514 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1515 | PL_cop_seqmax++; | |
dd2155a4 DM |
1516 | PL_min_intro_pending = 0; |
1517 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1518 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1519 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1520 | |
6012dc80 | 1521 | return seq; |
dd2155a4 DM |
1522 | } |
1523 | ||
1524 | /* | |
cc76b5cc | 1525 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1526 | |
1527 | Cleanup at end of scope during compilation: set the max seq number for | |
1528 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1529 | ||
1530 | =cut | |
1531 | */ | |
1532 | ||
1533 | void | |
1534 | Perl_pad_leavemy(pTHX) | |
1535 | { | |
97aff369 | 1536 | dVAR; |
dd2155a4 | 1537 | I32 off; |
551405c4 | 1538 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1539 | |
1540 | PL_pad_reset_pending = FALSE; | |
1541 | ||
f3548bdc | 1542 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1543 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1544 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1545 | const SV * const sv = svp[off]; |
9b387841 NC |
1546 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1547 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
1548 | "%"SVf" never introduced", | |
1549 | SVfARG(sv)); | |
dd2155a4 DM |
1550 | } |
1551 | } | |
1552 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1553 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1554 | const SV * const sv = svp[off]; |
2df5bdd7 DM |
1555 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) |
1556 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
1557 | { | |
809abb02 | 1558 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1559 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1560 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1561 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1562 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1563 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1564 | ); |
1565 | } | |
1566 | } | |
1567 | PL_cop_seqmax++; | |
6012dc80 DM |
1568 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1569 | PL_cop_seqmax++; | |
dd2155a4 DM |
1570 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1571 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1572 | } | |
1573 | ||
dd2155a4 | 1574 | /* |
cc76b5cc | 1575 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1576 | |
1577 | Abandon the tmp in the current pad at offset po and replace with a | |
1578 | new one. | |
1579 | ||
1580 | =cut | |
1581 | */ | |
1582 | ||
1583 | void | |
1584 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1585 | { | |
97aff369 | 1586 | dVAR; |
f3548bdc | 1587 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1588 | if (!PL_curpad) |
1589 | return; | |
1590 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1591 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1592 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1593 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1594 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1595 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1596 | |
1597 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1598 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1599 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1600 | ||
1601 | if (PL_curpad[po]) | |
1602 | SvPADTMP_off(PL_curpad[po]); | |
1603 | if (refadjust) | |
1604 | SvREFCNT_dec(PL_curpad[po]); | |
1605 | ||
9ad9869c DM |
1606 | |
1607 | /* if pad tmps aren't shared between ops, then there's no need to | |
1608 | * create a new tmp when an existing op is freed */ | |
1609 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1610 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1611 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1612 | #else |
1613 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1614 | #endif |
dd2155a4 DM |
1615 | if ((I32)po < PL_padix) |
1616 | PL_padix = po - 1; | |
1617 | } | |
1618 | ||
dd2155a4 | 1619 | /* |
cc76b5cc | 1620 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1621 | |
1622 | Mark all the current temporaries for reuse | |
1623 | ||
1624 | =cut | |
1625 | */ | |
1626 | ||
1627 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1628 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1629 | * on the stack by OPs that use them, there are several ways to get an alias | |
1630 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1631 | * We avoid doing this until we can think of a Better Way. | |
1632 | * GSAR 97-10-29 */ | |
1f676739 | 1633 | static void |
82af08ae | 1634 | S_pad_reset(pTHX) |
dd2155a4 | 1635 | { |
97aff369 | 1636 | dVAR; |
dd2155a4 | 1637 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 | 1638 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1639 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1640 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1641 | |
1642 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1643 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1644 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1645 | (long)PL_padix, (long)PL_padix_floor | |
1646 | ) | |
1647 | ); | |
1648 | ||
1649 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1650 | register I32 po; |
dd2155a4 DM |
1651 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1652 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1653 | SvPADTMP_off(PL_curpad[po]); | |
1654 | } | |
1655 | PL_padix = PL_padix_floor; | |
1656 | } | |
1657 | #endif | |
1658 | PL_pad_reset_pending = FALSE; | |
1659 | } | |
1660 | ||
dd2155a4 | 1661 | /* |
cc76b5cc Z |
1662 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1663 | ||
1664 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1665 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1666 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1667 | the kind of subroutine: | |
dd2155a4 | 1668 | |
cc76b5cc Z |
1669 | padtidy_SUB ordinary subroutine |
1670 | padtidy_SUBCLONE prototype for lexical closure | |
1671 | padtidy_FORMAT format | |
dd2155a4 DM |
1672 | |
1673 | =cut | |
1674 | */ | |
1675 | ||
1676 | /* XXX DAPM surely most of this stuff should be done properly | |
1677 | * at the right time beforehand, rather than going around afterwards | |
1678 | * cleaning up our mistakes ??? | |
1679 | */ | |
1680 | ||
1681 | void | |
1682 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1683 | { | |
27da23d5 | 1684 | dVAR; |
dd2155a4 | 1685 | |
f3548bdc | 1686 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1687 | |
1688 | /* If this CV has had any 'eval-capable' ops planted in it | |
1689 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1690 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1691 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1692 | * the right CvOUTSIDE. | |
1693 | * If running with -d, *any* sub may potentially have an eval | |
486ec47a | 1694 | * executed within it. |
b5c19bd7 DM |
1695 | */ |
1696 | ||
1697 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1698 | const CV *cv; |
b5c19bd7 DM |
1699 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1700 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1701 | break; /* no need to mark already-compiled code */ | |
1702 | if (CvANON(cv)) { | |
1703 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1704 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1705 | CvCLONE_on(cv); | |
a0d2bbd5 | 1706 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1707 | } |
1708 | } | |
1709 | } | |
1710 | ||
dd2155a4 DM |
1711 | /* extend curpad to match namepad */ |
1712 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1713 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1714 | |
1715 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1716 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1717 | PADOFFSET ix; |
b5c19bd7 | 1718 | |
dd2155a4 DM |
1719 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1720 | SV *namesv; | |
1721 | ||
1722 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1723 | continue; | |
1724 | /* | |
1725 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1726 | * pad are anonymous subs. |
dd2155a4 DM |
1727 | * The rest are created anew during cloning. |
1728 | */ | |
a0714e2c | 1729 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1730 | namesv != &PL_sv_undef && |
b15aece3 | 1731 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1732 | { |
1733 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1734 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1735 | } |
1736 | } | |
1737 | } | |
1738 | else if (type == padtidy_SUB) { | |
1739 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1740 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1741 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1742 | AvREIFY_only(av); |
dd2155a4 DM |
1743 | } |
1744 | ||
4cee4ca8 | 1745 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
adf8f095 | 1746 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1747 | PADOFFSET ix; |
dd2155a4 DM |
1748 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1749 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1750 | continue; | |
adf8f095 | 1751 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1752 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1753 | } else if (!SvFAKE(namep[ix])) { |
1754 | /* This is a work around for how the current implementation of | |
1755 | ?{ } blocks in regexps interacts with lexicals. | |
1756 | ||
1757 | One of our lexicals. | |
1758 | Can't do this on all lexicals, otherwise sub baz() won't | |
1759 | compile in | |
1760 | ||
1761 | my $foo; | |
1762 | ||
1763 | sub bar { ++$foo; } | |
1764 | ||
1765 | sub baz { ++$foo; } | |
1766 | ||
1767 | because completion of compiling &bar calling pad_tidy() | |
1768 | would cause (top level) $foo to be marked as stale, and | |
1769 | "no longer available". */ | |
1770 | SvPADSTALE_on(PL_curpad[ix]); | |
1771 | } | |
dd2155a4 DM |
1772 | } |
1773 | } | |
f3548bdc | 1774 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1775 | } |
1776 | ||
dd2155a4 | 1777 | /* |
cc76b5cc | 1778 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1779 | |
8627550a | 1780 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1781 | |
1782 | =cut | |
1783 | */ | |
1784 | ||
1785 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1786 | void | |
1787 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1788 | { | |
97aff369 | 1789 | dVAR; |
f3548bdc | 1790 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1791 | if (!PL_curpad) |
1792 | return; | |
1793 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1794 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1795 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1796 | if (!po) |
1797 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1798 | ||
1799 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1800 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1801 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1802 | ); | |
1803 | ||
1804 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
9a214eec | 1805 | SvFLAGS(PL_curpad[po]) &= ~SVs_PADTMP; /* also clears SVs_PADSTALE */ |
dd2155a4 DM |
1806 | } |
1807 | if ((I32)po < PL_padix) | |
1808 | PL_padix = po - 1; | |
1809 | } | |
1810 | ||
dd2155a4 | 1811 | /* |
cc76b5cc | 1812 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1813 | |
1814 | Dump the contents of a padlist | |
1815 | ||
1816 | =cut | |
1817 | */ | |
1818 | ||
1819 | void | |
1820 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1821 | { | |
97aff369 | 1822 | dVAR; |
e1ec3a88 AL |
1823 | const AV *pad_name; |
1824 | const AV *pad; | |
dd2155a4 DM |
1825 | SV **pname; |
1826 | SV **ppad; | |
dd2155a4 DM |
1827 | I32 ix; |
1828 | ||
7918f24d NC |
1829 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1830 | ||
dd2155a4 DM |
1831 | if (!padlist) { |
1832 | return; | |
1833 | } | |
502c6561 NC |
1834 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1835 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1836 | pname = AvARRAY(pad_name); |
1837 | ppad = AvARRAY(pad); | |
1838 | Perl_dump_indent(aTHX_ level, file, | |
1839 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1840 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1841 | ); | |
1842 | ||
1843 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1844 | const SV *namesv = pname[ix]; |
dd2155a4 | 1845 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1846 | namesv = NULL; |
dd2155a4 DM |
1847 | } |
1848 | if (namesv) { | |
ee6cee0c DM |
1849 | if (SvFAKE(namesv)) |
1850 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1851 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1852 | (int) ix, |
1853 | PTR2UV(ppad[ix]), | |
1854 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1855 | SvPVX_const(namesv), |
809abb02 NC |
1856 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1857 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1858 | |
ee6cee0c DM |
1859 | ); |
1860 | else | |
1861 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1862 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1863 | (int) ix, |
1864 | PTR2UV(ppad[ix]), | |
1865 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1866 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1867 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1868 | SvPVX_const(namesv) |
ee6cee0c | 1869 | ); |
dd2155a4 DM |
1870 | } |
1871 | else if (full) { | |
1872 | Perl_dump_indent(aTHX_ level+1, file, | |
1873 | "%2d. 0x%"UVxf"<%lu>\n", | |
1874 | (int) ix, | |
1875 | PTR2UV(ppad[ix]), | |
1876 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1877 | ); | |
1878 | } | |
1879 | } | |
1880 | } | |
1881 | ||
cc76b5cc | 1882 | #ifdef DEBUGGING |
dd2155a4 DM |
1883 | |
1884 | /* | |
cc76b5cc | 1885 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1886 | |
1887 | dump the contents of a CV | |
1888 | ||
1889 | =cut | |
1890 | */ | |
1891 | ||
dd2155a4 | 1892 | STATIC void |
e1ec3a88 | 1893 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1894 | { |
97aff369 | 1895 | dVAR; |
53c1dcc0 AL |
1896 | const CV * const outside = CvOUTSIDE(cv); |
1897 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1898 | |
7918f24d NC |
1899 | PERL_ARGS_ASSERT_CV_DUMP; |
1900 | ||
dd2155a4 DM |
1901 | PerlIO_printf(Perl_debug_log, |
1902 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1903 | title, | |
1904 | PTR2UV(cv), | |
1905 | (CvANON(cv) ? "ANON" | |
71f882da | 1906 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1907 | : (cv == PL_main_cv) ? "MAIN" |
1908 | : CvUNIQUE(cv) ? "UNIQUE" | |
1909 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1910 | PTR2UV(outside), | |
1911 | (!outside ? "null" | |
1912 | : CvANON(outside) ? "ANON" | |
1913 | : (outside == PL_main_cv) ? "MAIN" | |
1914 | : CvUNIQUE(outside) ? "UNIQUE" | |
1915 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1916 | ||
1917 | PerlIO_printf(Perl_debug_log, | |
1918 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1919 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1920 | } | |
dd2155a4 | 1921 | |
cc76b5cc | 1922 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1923 | |
1924 | /* | |
cc76b5cc | 1925 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1926 | |
cc76b5cc Z |
1927 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1928 | of the function: its code, pad structure, and other attributes. | |
1929 | The prototype is combined with a capture of outer lexicals to which the | |
1930 | code refers, which are taken from the currently-executing instance of | |
1931 | the immediately surrounding code. | |
dd2155a4 DM |
1932 | |
1933 | =cut | |
1934 | */ | |
1935 | ||
1936 | CV * | |
1937 | Perl_cv_clone(pTHX_ CV *proto) | |
1938 | { | |
27da23d5 | 1939 | dVAR; |
dd2155a4 | 1940 | I32 ix; |
53c1dcc0 | 1941 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1942 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1943 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1944 | SV** const pname = AvARRAY(protopad_name); |
1945 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1946 | const I32 fname = AvFILLp(protopad_name); |
1947 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1948 | CV* cv; |
b5c19bd7 DM |
1949 | SV** outpad; |
1950 | CV* outside; | |
71f882da | 1951 | long depth; |
dd2155a4 | 1952 | |
7918f24d NC |
1953 | PERL_ARGS_ASSERT_CV_CLONE; |
1954 | ||
dd2155a4 DM |
1955 | assert(!CvUNIQUE(proto)); |
1956 | ||
1b5aaca6 FC |
1957 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
1958 | * reliable. The currently-running sub is always the one we need to | |
1959 | * close over. | |
1960 | * Note that in general for formats, CvOUTSIDE != find_runcv. | |
1961 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 1962 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 1963 | */ |
71f882da | 1964 | |
5dff782d | 1965 | if (SvTYPE(proto) == SVt_PVCV) |
71f882da | 1966 | outside = find_runcv(NULL); |
5dff782d | 1967 | else { |
af41786f | 1968 | outside = CvOUTSIDE(proto); |
5dff782d | 1969 | if (CvCLONE(outside) && ! CvCLONED(outside)) { |
70794f7b FC |
1970 | CV * const runcv = find_runcv_where( |
1971 | FIND_RUNCV_root_eq, (void *)CvROOT(outside), NULL | |
1972 | ); | |
1973 | if (runcv) outside = runcv; | |
5dff782d FC |
1974 | } |
1975 | } | |
71f882da DM |
1976 | depth = CvDEPTH(outside); |
1977 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1978 | if (!depth) | |
1979 | depth = 1; | |
f2ead8b8 | 1980 | assert(CvPADLIST(outside) || SvTYPE(proto) == SVt_PVFM); |
b5c19bd7 | 1981 | |
dd2155a4 DM |
1982 | ENTER; |
1983 | SAVESPTR(PL_compcv); | |
1984 | ||
ea726b52 | 1985 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
8be227ab FC |
1986 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC |
1987 | |CVf_SLABBED); | |
dd2155a4 DM |
1988 | CvCLONED_on(cv); |
1989 | ||
bad4ae38 FC |
1990 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) |
1991 | : CvFILE(proto); | |
b3f91e91 | 1992 | CvGV_set(cv,CvGV(proto)); |
c68d9564 | 1993 | CvSTASH_set(cv, CvSTASH(proto)); |
b34c0dd4 | 1994 | OP_REFCNT_LOCK; |
dd2155a4 | 1995 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1996 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1997 | CvSTART(cv) = CvSTART(proto); |
a0d2bbd5 FC |
1998 | if (CvHASEVAL(cv)) |
1999 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
b5c19bd7 | 2000 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
2001 | |
2002 | if (SvPOK(proto)) | |
ad64d0ec | 2003 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
09fb282d FC |
2004 | if (SvMAGIC(proto)) |
2005 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
dd2155a4 | 2006 | |
b7787f18 | 2007 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 2008 | |
b5c19bd7 | 2009 | av_fill(PL_comppad, fpad); |
7aaef02a | 2010 | for (ix = fname; ix > 0; ix--) |
dd2155a4 DM |
2011 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
2012 | ||
dd2155a4 DM |
2013 | PL_curpad = AvARRAY(PL_comppad); |
2014 | ||
f2ead8b8 FC |
2015 | outpad = CvPADLIST(outside) |
2016 | ? AvARRAY(AvARRAY(CvPADLIST(outside))[depth]) | |
2017 | : NULL; | |
f91073d4 | 2018 | assert(outpad || SvTYPE(cv) == SVt_PVFM); |
b5c19bd7 | 2019 | |
dd2155a4 | 2020 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
2021 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
2022 | SV *sv = NULL; | |
71f882da | 2023 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 2024 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
5aec98df FC |
2025 | /* formats may have an inactive, or even undefined, parent; |
2026 | but state vars are always available. */ | |
f2ead8b8 | 2027 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe FC |
2028 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
2029 | && !CvDEPTH(outside)) ) { | |
f91073d4 | 2030 | assert(SvTYPE(cv) == SVt_PVFM); |
a2a5de95 | 2031 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
0727928e | 2032 | "Variable \"%"SVf"\" is not available", namesv); |
a0714e2c | 2033 | sv = NULL; |
71f882da | 2034 | } |
33894c1a | 2035 | else |
f84c484e | 2036 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2037 | } |
71f882da | 2038 | if (!sv) { |
b15aece3 | 2039 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 2040 | if (sigil == '&') |
dd2155a4 | 2041 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 2042 | else if (sigil == '@') |
ad64d0ec | 2043 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2044 | else if (sigil == '%') |
ad64d0ec | 2045 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2046 | else |
561b68a9 | 2047 | sv = newSV(0); |
235cc2e3 | 2048 | SvPADMY_on(sv); |
0d3b281c DM |
2049 | /* reset the 'assign only once' flag on each state var */ |
2050 | if (SvPAD_STATE(namesv)) | |
2051 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
2052 | } |
2053 | } | |
2054 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 2055 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2056 | } |
2057 | else { | |
561b68a9 | 2058 | sv = newSV(0); |
dd2155a4 | 2059 | SvPADTMP_on(sv); |
dd2155a4 | 2060 | } |
71f882da | 2061 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2062 | } |
2063 | ||
dd2155a4 DM |
2064 | DEBUG_Xv( |
2065 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
2066 | cv_dump(outside, "Outside"); | |
2067 | cv_dump(proto, "Proto"); | |
2068 | cv_dump(cv, "To"); | |
2069 | ); | |
2070 | ||
2071 | LEAVE; | |
2072 | ||
2073 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
2074 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
2075 | * The prototype was marked as a candiate for const-ization, | |
2076 | * so try to grab the current const value, and if successful, | |
2077 | * turn into a const sub: | |
2078 | */ | |
551405c4 | 2079 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
2080 | if (const_sv) { |
2081 | SvREFCNT_dec(cv); | |
be8851fc NC |
2082 | /* For this calling case, op_const_sv returns a *copy*, which we |
2083 | donate to newCONSTSUB. Yes, this is ugly, and should be killed. | |
2084 | Need to fix how lib/constant.pm works to eliminate this. */ | |
bd61b366 | 2085 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
2086 | } |
2087 | else { | |
2088 | CvCONST_off(cv); | |
2089 | } | |
dd2155a4 DM |
2090 | } |
2091 | ||
2092 | return cv; | |
2093 | } | |
2094 | ||
dd2155a4 | 2095 | /* |
cc76b5cc | 2096 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2097 | |
2098 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
2099 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
2100 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
2101 | |
2102 | =cut | |
2103 | */ | |
2104 | ||
2105 | void | |
2106 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2107 | { | |
97aff369 | 2108 | dVAR; |
dd2155a4 | 2109 | I32 ix; |
502c6561 NC |
2110 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
2111 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
2112 | SV ** const namepad = AvARRAY(comppad_name); |
2113 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2114 | |
2115 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2116 | PERL_UNUSED_ARG(old_cv); |
2117 | ||
dd2155a4 | 2118 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2119 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 2120 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 2121 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2122 | { |
e09ac076 | 2123 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
ea726b52 | 2124 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
2125 | assert(CvWEAKOUTSIDE(innercv)); |
2126 | assert(CvOUTSIDE(innercv) == old_cv); | |
2127 | CvOUTSIDE(innercv) = new_cv; | |
e09ac076 FC |
2128 | } |
2129 | else { /* format reference */ | |
2130 | SV * const rv = curpad[ix]; | |
2131 | CV *innercv; | |
2132 | if (!SvOK(rv)) continue; | |
2133 | assert(SvROK(rv)); | |
2134 | assert(SvWEAKREF(rv)); | |
2135 | innercv = (CV *)SvRV(rv); | |
2136 | assert(!CvWEAKOUTSIDE(innercv)); | |
2137 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2138 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2139 | } | |
dd2155a4 DM |
2140 | } |
2141 | } | |
2142 | } | |
2143 | ||
2144 | /* | |
cc76b5cc | 2145 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2146 | |
2147 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2148 | this depth, in which case don't bother creating a new one. Then give |
2149 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2150 | |
2151 | =cut | |
2152 | */ | |
2153 | ||
2154 | void | |
26019298 | 2155 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2156 | { |
97aff369 | 2157 | dVAR; |
7918f24d NC |
2158 | |
2159 | PERL_ARGS_ASSERT_PAD_PUSH; | |
2160 | ||
b37c2d43 | 2161 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
2162 | SV** const svp = AvARRAY(padlist); |
2163 | AV* const newpad = newAV(); | |
2164 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2165 | I32 ix = AvFILLp((const AV *)svp[1]); |
2166 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2167 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2168 | AV *av; |
2169 | ||
dd2155a4 DM |
2170 | for ( ;ix > 0; ix--) { |
2171 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 2172 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2173 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2174 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2175 | || sigil == '&') | |
2176 | { | |
dd2155a4 DM |
2177 | /* outer lexical or anon code */ |
2178 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2179 | } | |
2180 | else { /* our own lexical */ | |
26019298 AL |
2181 | SV *sv; |
2182 | if (sigil == '@') | |
ad64d0ec | 2183 | sv = MUTABLE_SV(newAV()); |
26019298 | 2184 | else if (sigil == '%') |
ad64d0ec | 2185 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2186 | else |
561b68a9 | 2187 | sv = newSV(0); |
26019298 | 2188 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2189 | SvPADMY_on(sv); |
2190 | } | |
2191 | } | |
2192 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 2193 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2194 | } |
2195 | else { | |
2196 | /* save temporaries on recursion? */ | |
561b68a9 | 2197 | SV * const sv = newSV(0); |
26019298 | 2198 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2199 | SvPADTMP_on(sv); |
2200 | } | |
2201 | } | |
26019298 | 2202 | av = newAV(); |
ad64d0ec | 2203 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2204 | AvREIFY_only(av); |
26019298 | 2205 | |
ad64d0ec | 2206 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
2207 | AvFILLp(padlist) = depth; |
2208 | } | |
2209 | } | |
b21dc031 | 2210 | |
cc76b5cc Z |
2211 | /* |
2212 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2213 | ||
2214 | Looks up the type of the lexical variable at position I<po> in the | |
2215 | currently-compiling pad. If the variable is typed, the stash of the | |
2216 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2217 | ||
2218 | =cut | |
2219 | */ | |
b21dc031 AL |
2220 | |
2221 | HV * | |
2222 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2223 | { | |
97aff369 | 2224 | dVAR; |
551405c4 | 2225 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 2226 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
2227 | return SvSTASH(*av); |
2228 | } | |
5c284bb0 | 2229 | return NULL; |
b21dc031 | 2230 | } |
66610fdd | 2231 | |
d5b1589c NC |
2232 | #if defined(USE_ITHREADS) |
2233 | ||
2234 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2235 | ||
cc76b5cc Z |
2236 | /* |
2237 | =for apidoc m|AV *|padlist_dup|AV *srcpad|CLONE_PARAMS *param | |
2238 | ||
2239 | Duplicates a pad. | |
2240 | ||
2241 | =cut | |
2242 | */ | |
2243 | ||
d5b1589c | 2244 | AV * |
cc76b5cc | 2245 | Perl_padlist_dup(pTHX_ AV *srcpad, CLONE_PARAMS *param) |
d5b1589c NC |
2246 | { |
2247 | AV *dstpad; | |
2248 | PERL_ARGS_ASSERT_PADLIST_DUP; | |
2249 | ||
2250 | if (!srcpad) | |
2251 | return NULL; | |
2252 | ||
6de654a5 NC |
2253 | if (param->flags & CLONEf_COPY_STACKS |
2254 | || SvREFCNT(AvARRAY(srcpad)[1]) > 1) { | |
6de654a5 | 2255 | dstpad = av_dup_inc(srcpad, param); |
6de654a5 NC |
2256 | assert (SvREFCNT(AvARRAY(srcpad)[1]) == 1); |
2257 | } else { | |
2258 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2259 | to build anything other than the first level of pads. */ | |
2260 | ||
2261 | I32 ix = AvFILLp((const AV *)AvARRAY(srcpad)[1]); | |
2262 | AV *pad1; | |
05d04d9c | 2263 | const I32 names_fill = AvFILLp((const AV *)(AvARRAY(srcpad)[0])); |
6de654a5 NC |
2264 | const AV *const srcpad1 = (const AV *) AvARRAY(srcpad)[1]; |
2265 | SV **oldpad = AvARRAY(srcpad1); | |
2266 | SV **names; | |
2267 | SV **pad1a; | |
2268 | AV *args; | |
7d953ba8 FC |
2269 | /* Look for it in the table first, as the padlist may have ended up |
2270 | as an element of @DB::args (or theoretically even @_), so it may | |
104a8185 | 2271 | may have been cloned already. */ |
6de654a5 NC |
2272 | dstpad = (AV*)ptr_table_fetch(PL_ptr_table, srcpad); |
2273 | ||
2274 | if (dstpad) | |
7d953ba8 | 2275 | return (AV *)SvREFCNT_inc_simple_NN(dstpad); |
6de654a5 NC |
2276 | |
2277 | dstpad = newAV(); | |
2278 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
6de654a5 NC |
2279 | av_extend(dstpad, 1); |
2280 | AvARRAY(dstpad)[0] = MUTABLE_SV(av_dup_inc(AvARRAY(srcpad)[0], param)); | |
2281 | names = AvARRAY(AvARRAY(dstpad)[0]); | |
2282 | ||
2283 | pad1 = newAV(); | |
2284 | ||
2285 | av_extend(pad1, ix); | |
2286 | AvARRAY(dstpad)[1] = MUTABLE_SV(pad1); | |
2287 | pad1a = AvARRAY(pad1); | |
2288 | AvFILLp(dstpad) = 1; | |
2289 | ||
2290 | if (ix > -1) { | |
2291 | AvFILLp(pad1) = ix; | |
2292 | ||
2293 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2294 | if (!oldpad[ix]) { |
2295 | pad1a[ix] = NULL; | |
2296 | } else if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
2297 | const char sigil = SvPVX_const(names[ix])[0]; | |
2298 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2299 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2300 | || sigil == '&') | |
2301 | { | |
2302 | /* outer lexical or anon code */ | |
2303 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2304 | } | |
2305 | else { /* our own lexical */ | |
adf8f095 NC |
2306 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2307 | /* This is a work around for how the current | |
2308 | implementation of ?{ } blocks in regexps | |
2309 | interacts with lexicals. */ | |
05d04d9c NC |
2310 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2311 | } else { | |
2312 | SV *sv; | |
2313 | ||
2314 | if (sigil == '@') | |
2315 | sv = MUTABLE_SV(newAV()); | |
2316 | else if (sigil == '%') | |
2317 | sv = MUTABLE_SV(newHV()); | |
2318 | else | |
2319 | sv = newSV(0); | |
2320 | pad1a[ix] = sv; | |
2321 | SvPADMY_on(sv); | |
2322 | } | |
2323 | } | |
2324 | } | |
2325 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
2326 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2327 | } | |
2328 | else { | |
2329 | /* save temporaries on recursion? */ | |
2330 | SV * const sv = newSV(0); | |
2331 | pad1a[ix] = sv; | |
2332 | ||
2333 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2334 | FIXTHAT before merging this branch. | |
2335 | (And I know how to) */ | |
2336 | if (SvPADMY(oldpad[ix])) | |
2337 | SvPADMY_on(sv); | |
2338 | else | |
2339 | SvPADTMP_on(sv); | |
2340 | } | |
6de654a5 NC |
2341 | } |
2342 | ||
2343 | if (oldpad[0]) { | |
2344 | args = newAV(); /* Will be @_ */ | |
2345 | AvREIFY_only(args); | |
2346 | pad1a[0] = (SV *)args; | |
2347 | } | |
2348 | } | |
2349 | } | |
d5b1589c NC |
2350 | |
2351 | return dstpad; | |
2352 | } | |
2353 | ||
cc76b5cc | 2354 | #endif /* USE_ITHREADS */ |
d5b1589c | 2355 | |
66610fdd RGS |
2356 | /* |
2357 | * Local variables: | |
2358 | * c-indentation-style: bsd | |
2359 | * c-basic-offset: 4 | |
14d04a33 | 2360 | * indent-tabs-mode: nil |
66610fdd RGS |
2361 | * End: |
2362 | * | |
14d04a33 | 2363 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2364 | */ |