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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 | |
58a9b2fe | 32 | CV's can have CvPADLIST(cv) set to point to a PADLIST. This is the CV's |
cc76b5cc Z |
33 | scratchpad, which stores lexical variables and opcode temporary and |
34 | per-thread values. | |
dd2155a4 | 35 | |
58a9b2fe | 36 | For these purposes "formats" are a kind-of CV; eval""s are too (except they're |
dd2155a4 | 37 | not callable at will and are always thrown away after the eval"" is done |
58a9b2fe | 38 | executing). Require'd files are simply evals without any outer lexical |
b5c19bd7 | 39 | scope. |
dd2155a4 | 40 | |
eacbb379 | 41 | XSUBs do not have a CvPADLIST. dXSTARG fetches values from PL_curpad, |
dd2155a4 | 42 | but that is really the callers pad (a slot of which is allocated by |
eacbb379 DD |
43 | every entersub). Do not get or set CvPADLIST if a CV is an XSUB (as |
44 | determined by C<CvISXSUB()>), CvPADLIST slot is reused for a different | |
45 | internal purpose in XSUBs. | |
dd2155a4 | 46 | |
58a9b2fe | 47 | The PADLIST has a C array where pads are stored. |
dd2155a4 | 48 | |
58a9b2fe FC |
49 | The 0th entry of the PADLIST is a PADNAMELIST (which is actually just an |
50 | AV, but that may change) which represents the "names" or rather | |
51 | the "static type information" for lexicals. The individual elements of a | |
7a5eb04d FC |
52 | PADNAMELIST are PADNAMEs (just SVs; but, again, that may change). Future |
53 | refactorings might stop the PADNAMELIST from being stored in the PADLIST's | |
86d2498c | 54 | array, so don't rely on it. See L</PadlistNAMES>. |
dd2155a4 | 55 | |
58a9b2fe FC |
56 | The CvDEPTH'th entry of a PADLIST is a PAD (an AV) which is the stack frame |
57 | at that depth of recursion into the CV. The 0th slot of a frame AV is an | |
58 | AV which is @_. Other entries are storage for variables and op targets. | |
dd2155a4 | 59 | |
58a9b2fe | 60 | Iterating over the PADNAMELIST iterates over all possible pad |
272ce8bb FC |
61 | items. Pad slots for targets (SVs_PADTMP) |
62 | and GVs end up having &PL_sv_undef | |
325e1816 | 63 | "names", while slots for constants have &PL_sv_no "names" (see |
fb090176 FC |
64 | pad_alloc()). That &PL_sv_no is used is an implementation detail subject |
65 | to change. To test for it, use C<PadnamePV(name) && !PadnameLEN(name)>. | |
dd2155a4 | 66 | |
58a9b2fe | 67 | Only my/our variable (SvPADMY/PADNAME_isOUR) slots get valid names. |
dd2155a4 DM |
68 | The rest are op targets/GVs/constants which are statically allocated |
69 | or resolved at compile time. These don't have names by which they | |
58a9b2fe | 70 | can be looked up from Perl code at run time through eval"" the way |
dd2155a4 DM |
71 | my/our variables can be. Since they can't be looked up by "name" |
72 | but only by their index allocated at compile time (which is usually | |
73 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
74 | ||
75 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 76 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
77 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
78 | _HIGH). During compilation, these fields may hold the special value | |
79 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
80 | |
81 | COP_SEQ_RANGE_LOW _HIGH | |
82 | ----------------- ----- | |
83 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
84 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
85 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
86 | ||
87 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 88 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 89 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 90 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 91 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 92 | |
c44737a2 FC |
93 | If PADNAME_OUTER (SvFAKE) is set on the |
94 | name SV, then that slot in the frame AV is | |
72d33970 | 95 | a REFCNT'ed reference to a lexical from "outside". In this case, |
3441fb63 | 96 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
72d33970 | 97 | in scope throughout. Instead xhigh stores some flags containing info about |
b5c19bd7 | 98 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 99 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
100 | within the parent's pad where the lexical's value is stored, to make |
101 | cloning quicker. | |
dd2155a4 | 102 | |
58a9b2fe | 103 | If the 'name' is '&' the corresponding entry in the PAD |
dd2155a4 | 104 | is a CV representing a possible closure. |
c44737a2 FC |
105 | (PADNAME_OUTER and name of '&' is not a |
106 | meaningful combination currently but could | |
dd2155a4 DM |
107 | become so if C<my sub foo {}> is implemented.) |
108 | ||
71f882da DM |
109 | Note that formats are treated as anon subs, and are cloned each time |
110 | write is called (if necessary). | |
111 | ||
ab8e66c1 | 112 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
58a9b2fe FC |
113 | and set on scope exit. This allows the |
114 | 'Variable $x is not available' warning | |
e6e7068b DM |
115 | to be generated in evals, such as |
116 | ||
117 | { my $x = 1; sub f { eval '$x'} } f(); | |
118 | ||
58a9b2fe | 119 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised'. |
d1186544 | 120 | |
36c300bb | 121 | =for apidoc AmxU|PADNAMELIST *|PL_comppad_name |
cc76b5cc Z |
122 | |
123 | During compilation, this points to the array containing the names part | |
124 | of the pad for the currently-compiling code. | |
125 | ||
36c300bb | 126 | =for apidoc AmxU|PAD *|PL_comppad |
cc76b5cc Z |
127 | |
128 | During compilation, this points to the array containing the values | |
129 | part of the pad for the currently-compiling code. (At runtime a CV may | |
130 | have many such value arrays; at compile time just one is constructed.) | |
131 | At runtime, this points to the array containing the currently-relevant | |
132 | values for the pad for the currently-executing code. | |
133 | ||
134 | =for apidoc AmxU|SV **|PL_curpad | |
135 | ||
136 | Points directly to the body of the L</PL_comppad> array. | |
c14a2249 | 137 | (I.e., this is C<PAD_ARRAY(PL_comppad)>.) |
cc76b5cc | 138 | |
dd2155a4 DM |
139 | =cut |
140 | */ | |
141 | ||
142 | ||
143 | #include "EXTERN.h" | |
144 | #define PERL_IN_PAD_C | |
145 | #include "perl.h" | |
952306ac | 146 | #include "keywords.h" |
dd2155a4 | 147 | |
3441fb63 NC |
148 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
149 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
150 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
151 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 152 | |
3441fb63 NC |
153 | #define PARENT_PAD_INDEX_set(sv,val) \ |
154 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
155 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
156 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 157 | |
cc76b5cc | 158 | /* |
5b16296c BF |
159 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
160 | and bytes checking. | |
161 | */ | |
162 | ||
76d60a53 NC |
163 | static bool |
164 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
165 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
166 | const char *pv1 = SvPVX_const(sv); | |
167 | STRLEN cur1 = SvCUR(sv); | |
168 | const char *pv2 = pv; | |
169 | STRLEN cur2 = pvlen; | |
170 | if (PL_encoding) { | |
171 | SV* svrecode = NULL; | |
172 | if (SvUTF8(sv)) { | |
173 | svrecode = newSVpvn(pv2, cur2); | |
174 | sv_recode_to_utf8(svrecode, PL_encoding); | |
175 | pv2 = SvPV_const(svrecode, cur2); | |
176 | } | |
177 | else { | |
178 | svrecode = newSVpvn(pv1, cur1); | |
179 | sv_recode_to_utf8(svrecode, PL_encoding); | |
180 | pv1 = SvPV_const(svrecode, cur1); | |
181 | } | |
fc2b2dca | 182 | SvREFCNT_dec_NN(svrecode); |
5b16296c BF |
183 | } |
184 | if (flags & SVf_UTF8) | |
185 | return (bytes_cmp_utf8( | |
186 | (const U8*)pv1, cur1, | |
187 | (const U8*)pv2, cur2) == 0); | |
188 | else | |
189 | return (bytes_cmp_utf8( | |
190 | (const U8*)pv2, cur2, | |
191 | (const U8*)pv1, cur1) == 0); | |
192 | } | |
193 | else | |
194 | return ((SvPVX_const(sv) == pv) | |
195 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
196 | } | |
197 | ||
eacbb379 DD |
198 | #ifdef DEBUGGING |
199 | void | |
200 | Perl_set_padlist(pTHX_ CV * cv, PADLIST *padlist){ | |
201 | PERL_ARGS_ASSERT_SET_PADLIST; | |
202 | # if PTRSIZE == 8 | |
203 | if((Size_t)padlist == UINT64_C(0xEFEFEFEFEFEFEFEF)){ | |
204 | assert(0); | |
205 | } | |
206 | # elif PTRSIZE == 4 | |
207 | if((Size_t)padlist == UINT64_C(0xEFEFEFEF)){ | |
208 | assert(0); | |
209 | } | |
210 | # else | |
211 | # error unknown pointer size | |
212 | # endif | |
213 | if(CvISXSUB(cv)){ | |
214 | assert(0); | |
215 | } | |
216 | ((XPVCV*)MUTABLE_PTR(SvANY(cv)))->xcv_padlist_u.xcv_padlist = padlist; | |
217 | } | |
218 | #endif | |
5b16296c BF |
219 | |
220 | /* | |
cc76b5cc | 221 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 222 | |
cc76b5cc Z |
223 | Create a new padlist, updating the global variables for the |
224 | currently-compiling padlist to point to the new padlist. The following | |
225 | flags can be OR'ed together: | |
dd2155a4 DM |
226 | |
227 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 228 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
229 | padnew_SAVESUB also save extra stuff for start of sub |
230 | ||
231 | =cut | |
232 | */ | |
233 | ||
234 | PADLIST * | |
c7c737cb | 235 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 236 | { |
7261499d FC |
237 | PADLIST *padlist; |
238 | PAD *padname, *pad; | |
239 | PAD **ary; | |
dd2155a4 | 240 | |
f3548bdc DM |
241 | ASSERT_CURPAD_LEGAL("pad_new"); |
242 | ||
dd2155a4 DM |
243 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
244 | * vars (based on flags) rather than storing vals + addresses for | |
245 | * each individually. Also see pad_block_start. | |
246 | * XXX DAPM Try to see whether all these conditionals are required | |
247 | */ | |
248 | ||
249 | /* save existing state, ... */ | |
250 | ||
251 | if (flags & padnew_SAVE) { | |
3979c56f | 252 | SAVECOMPPAD(); |
dd2155a4 | 253 | if (! (flags & padnew_CLONE)) { |
cbacc9aa | 254 | SAVESPTR(PL_comppad_name); |
dd2155a4 | 255 | SAVEI32(PL_padix); |
b54c5e14 | 256 | SAVEI32(PL_constpadix); |
dd2155a4 DM |
257 | SAVEI32(PL_comppad_name_fill); |
258 | SAVEI32(PL_min_intro_pending); | |
259 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 260 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 261 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 262 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
263 | } |
264 | } | |
265 | } | |
266 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
267 | * saved - check at some pt that this is okay */ | |
268 | ||
269 | /* ... create new pad ... */ | |
270 | ||
7261499d | 271 | Newxz(padlist, 1, PADLIST); |
dd2155a4 DM |
272 | pad = newAV(); |
273 | ||
274 | if (flags & padnew_CLONE) { | |
275 | /* XXX DAPM I dont know why cv_clone needs it | |
276 | * doing differently yet - perhaps this separate branch can be | |
277 | * dispensed with eventually ??? | |
278 | */ | |
279 | ||
e1ec3a88 | 280 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 281 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 282 | AvREIFY_only(a0); |
9ef8d569 FC |
283 | |
284 | padname = (PAD *)SvREFCNT_inc_simple_NN(PL_comppad_name); | |
dd2155a4 DM |
285 | } |
286 | else { | |
a0714e2c | 287 | av_store(pad, 0, NULL); |
9ef8d569 | 288 | padname = newAV(); |
7db6405c | 289 | AvPAD_NAMELIST_on(padname); |
ce0d59fd | 290 | av_store(padname, 0, &PL_sv_undef); |
dd2155a4 DM |
291 | } |
292 | ||
7a6072a8 NC |
293 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
294 | array - names, and depth=1. The default for av_store() is to allocate | |
295 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
296 | up, so we inline the allocation of the array here. */ | |
7261499d | 297 | Newx(ary, 2, PAD *); |
86d2498c FC |
298 | PadlistMAX(padlist) = 1; |
299 | PadlistARRAY(padlist) = ary; | |
7261499d FC |
300 | ary[0] = padname; |
301 | ary[1] = pad; | |
dd2155a4 DM |
302 | |
303 | /* ... then update state variables */ | |
304 | ||
403799bf NC |
305 | PL_comppad = pad; |
306 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
307 | |
308 | if (! (flags & padnew_CLONE)) { | |
9ef8d569 | 309 | PL_comppad_name = padname; |
dd2155a4 DM |
310 | PL_comppad_name_fill = 0; |
311 | PL_min_intro_pending = 0; | |
312 | PL_padix = 0; | |
b54c5e14 | 313 | PL_constpadix = 0; |
b5c19bd7 | 314 | PL_cv_has_eval = 0; |
dd2155a4 DM |
315 | } |
316 | ||
317 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 318 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 319 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 320 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
321 | PTR2UV(padname), (UV)flags |
322 | ) | |
323 | ); | |
324 | ||
325 | return (PADLIST*)padlist; | |
326 | } | |
327 | ||
dd2155a4 | 328 | |
c4528262 NC |
329 | /* |
330 | =head1 Embedding Functions | |
331 | ||
332 | =for apidoc cv_undef | |
333 | ||
72d33970 | 334 | Clear out all the active components of a CV. This can happen either |
c4528262 NC |
335 | by an explicit C<undef &foo>, or by the reference count going to zero. |
336 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
337 | children can still follow the full lexical scope chain. | |
338 | ||
339 | =cut | |
340 | */ | |
341 | ||
342 | void | |
343 | Perl_cv_undef(pTHX_ CV *cv) | |
344 | { | |
b7acb0a3 FC |
345 | PERL_ARGS_ASSERT_CV_UNDEF; |
346 | cv_undef_flags(cv, 0); | |
347 | } | |
348 | ||
349 | void | |
350 | Perl_cv_undef_flags(pTHX_ CV *cv, U32 flags) | |
351 | { | |
52ec28d5 DD |
352 | CV cvbody;/*CV body will never be realloced inside this func, |
353 | so dont read it more than once, use fake CV so existing macros | |
354 | will work, the indirection and CV head struct optimized away*/ | |
355 | SvANY(&cvbody) = SvANY(cv); | |
c4528262 | 356 | |
b7acb0a3 | 357 | PERL_ARGS_ASSERT_CV_UNDEF_FLAGS; |
c4528262 NC |
358 | |
359 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
360 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
361 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
362 | ); | |
363 | ||
52ec28d5 DD |
364 | if (CvFILE(&cvbody)) { |
365 | char * file = CvFILE(&cvbody); | |
366 | CvFILE(&cvbody) = NULL; | |
367 | if(CvDYNFILE(&cvbody)) | |
368 | Safefree(file); | |
c4528262 | 369 | } |
dd2155a4 | 370 | |
52ec28d5 DD |
371 | /* CvSLABBED_off(&cvbody); *//* turned off below */ |
372 | /* release the sub's body */ | |
373 | if (!CvISXSUB(&cvbody)) { | |
374 | if(CvROOT(&cvbody)) { | |
375 | assert(SvTYPE(cv) == SVt_PVCV || SvTYPE(cv) == SVt_PVFM); /*unsafe is safe */ | |
376 | if (CvDEPTHunsafe(&cvbody)) { | |
377 | assert(SvTYPE(cv) == SVt_PVCV); | |
378 | Perl_croak_nocontext("Can't undef active subroutine"); | |
379 | } | |
380 | ENTER; | |
381 | ||
382 | PAD_SAVE_SETNULLPAD(); | |
383 | ||
384 | if (CvSLABBED(&cvbody)) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(&cvbody))); | |
385 | op_free(CvROOT(&cvbody)); | |
386 | CvROOT(&cvbody) = NULL; | |
387 | CvSTART(&cvbody) = NULL; | |
388 | LEAVE; | |
389 | } | |
390 | else if (CvSLABBED(&cvbody)) { | |
391 | if( CvSTART(&cvbody)) { | |
392 | ENTER; | |
393 | PAD_SAVE_SETNULLPAD(); | |
394 | ||
395 | /* discard any leaked ops */ | |
396 | if (PL_parser) | |
397 | parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(&cvbody)); | |
398 | opslab_force_free((OPSLAB *)CvSTART(&cvbody)); | |
399 | CvSTART(&cvbody) = NULL; | |
400 | ||
401 | LEAVE; | |
402 | } | |
7aef8e5b | 403 | #ifdef DEBUGGING |
52ec28d5 | 404 | else Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
8be227ab | 405 | #endif |
52ec28d5 DD |
406 | } |
407 | } | |
408 | else { /* dont bother checking if CvXSUB(cv) is true, less branching */ | |
409 | CvXSUB(&cvbody) = NULL; | |
410 | } | |
c4528262 | 411 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 412 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
b7acb0a3 | 413 | if (!(flags & CV_UNDEF_KEEP_NAME)) { |
52ec28d5 DD |
414 | if (CvNAMED(&cvbody)) { |
415 | CvNAME_HEK_set(&cvbody, NULL); | |
416 | CvNAMED_off(&cvbody); | |
b7acb0a3 FC |
417 | } |
418 | else CvGV_set(cv, NULL); | |
419 | } | |
c4528262 | 420 | |
c2736fce NC |
421 | /* This statement and the subsequence if block was pad_undef(). */ |
422 | pad_peg("pad_undef"); | |
423 | ||
eacbb379 | 424 | if (!CvISXSUB(&cvbody) && CvPADLIST(&cvbody)) { |
c2736fce | 425 | I32 ix; |
52ec28d5 | 426 | const PADLIST *padlist = CvPADLIST(&cvbody); |
c2736fce NC |
427 | |
428 | /* Free the padlist associated with a CV. | |
429 | If parts of it happen to be current, we null the relevant PL_*pad* | |
430 | global vars so that we don't have any dangling references left. | |
431 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
432 | subs to the outer of this cv. */ | |
433 | ||
434 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
435 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
436 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
437 | ); | |
438 | ||
439 | /* detach any '&' anon children in the pad; if afterwards they | |
440 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
441 | * bypassing us. */ | |
442 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
443 | * children, or integrate this loop with general cleanup */ | |
444 | ||
445 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
52ec28d5 DD |
446 | CV * const outercv = CvOUTSIDE(&cvbody); |
447 | const U32 seq = CvOUTSIDE_SEQ(&cvbody); | |
86d2498c | 448 | PAD * const comppad_name = PadlistARRAY(padlist)[0]; |
c2736fce | 449 | SV ** const namepad = AvARRAY(comppad_name); |
86d2498c | 450 | PAD * const comppad = PadlistARRAY(padlist)[1]; |
c2736fce NC |
451 | SV ** const curpad = AvARRAY(comppad); |
452 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
453 | SV * const namesv = namepad[ix]; | |
454 | if (namesv && namesv != &PL_sv_undef | |
455 | && *SvPVX_const(namesv) == '&') | |
456 | { | |
457 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
458 | U32 inner_rc = SvREFCNT(innercv); | |
459 | assert(inner_rc); | |
e09ac076 | 460 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
461 | |
462 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
463 | curpad[ix] = NULL; | |
fc2b2dca | 464 | SvREFCNT_dec_NN(innercv); |
c2736fce NC |
465 | inner_rc--; |
466 | } | |
467 | ||
468 | /* in use, not just a prototype */ | |
469 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
470 | assert(CvWEAKOUTSIDE(innercv)); | |
471 | /* don't relink to grandfather if he's being freed */ | |
472 | if (outercv && SvREFCNT(outercv)) { | |
473 | CvWEAKOUTSIDE_off(innercv); | |
474 | CvOUTSIDE(innercv) = outercv; | |
475 | CvOUTSIDE_SEQ(innercv) = seq; | |
476 | SvREFCNT_inc_simple_void_NN(outercv); | |
477 | } | |
478 | else { | |
479 | CvOUTSIDE(innercv) = NULL; | |
480 | } | |
481 | } | |
482 | } | |
483 | } | |
484 | } | |
485 | ||
86d2498c | 486 | ix = PadlistMAX(padlist); |
aa2f79cf | 487 | while (ix > 0) { |
86d2498c | 488 | PAD * const sv = PadlistARRAY(padlist)[ix--]; |
c2736fce | 489 | if (sv) { |
7261499d | 490 | if (sv == PL_comppad) { |
c2736fce NC |
491 | PL_comppad = NULL; |
492 | PL_curpad = NULL; | |
493 | } | |
fc2b2dca | 494 | SvREFCNT_dec_NN(sv); |
c2736fce | 495 | } |
aa2f79cf NC |
496 | } |
497 | { | |
86d2498c | 498 | PAD * const sv = PadlistARRAY(padlist)[0]; |
9ef8d569 | 499 | if (sv == PL_comppad_name && SvREFCNT(sv) == 1) |
aa2f79cf | 500 | PL_comppad_name = NULL; |
c2736fce NC |
501 | SvREFCNT_dec(sv); |
502 | } | |
86d2498c | 503 | if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist)); |
7261499d | 504 | Safefree(padlist); |
eacbb379 | 505 | CvPADLIST_set(&cvbody, NULL); |
c2736fce | 506 | } |
eacbb379 DD |
507 | else if (CvISXSUB(&cvbody)) /* future union */ |
508 | CvRESERVED(&cvbody) = NULL; | |
509 | /* else is (!CvISXSUB(&cvbody) && !CvPADLIST(&cvbody)) {do nothing;} */ | |
c2736fce | 510 | |
c4528262 NC |
511 | |
512 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
52ec28d5 DD |
513 | if (!SvREFCNT(cv)) { |
514 | CV * outside = CvOUTSIDE(&cvbody); | |
515 | if(outside) { | |
516 | CvOUTSIDE(&cvbody) = NULL; | |
517 | if (!CvWEAKOUTSIDE(&cvbody)) | |
518 | SvREFCNT_dec_NN(outside); | |
519 | } | |
c4528262 | 520 | } |
52ec28d5 DD |
521 | if (CvCONST(&cvbody)) { |
522 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(&cvbody).any_ptr)); | |
523 | /* CvCONST_off(cv); *//* turned off below */ | |
c4528262 NC |
524 | } |
525 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
b7acb0a3 FC |
526 | * ref status of CvOUTSIDE and CvGV, and ANON, NAMED and |
527 | * LEXICAL, which are used to determine the sub's name. */ | |
52ec28d5 | 528 | CvFLAGS(&cvbody) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON|CVf_LEXICAL |
b7acb0a3 | 529 | |CVf_NAMED); |
c4528262 | 530 | } |
dd2155a4 | 531 | |
50dc2bd3 FC |
532 | /* |
533 | =for apidoc cv_forget_slab | |
534 | ||
535 | When a CV has a reference count on its slab (CvSLABBED), it is responsible | |
536 | for making sure it is freed. (Hence, no two CVs should ever have a | |
537 | reference count on the same slab.) The CV only needs to reference the slab | |
538 | during compilation. Once it is compiled and CvROOT attached, it has | |
539 | finished its job, so it can forget the slab. | |
540 | ||
541 | =cut | |
542 | */ | |
543 | ||
8be227ab FC |
544 | void |
545 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
546 | { | |
547 | const bool slabbed = !!CvSLABBED(cv); | |
3107b51f | 548 | OPSLAB *slab = NULL; |
8be227ab FC |
549 | |
550 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
551 | ||
552 | if (!slabbed) return; | |
553 | ||
554 | CvSLABBED_off(cv); | |
555 | ||
3107b51f FC |
556 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
557 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 558 | #ifdef DEBUGGING |
eb212a1c | 559 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
7aef8e5b | 560 | #endif |
3107b51f | 561 | |
3107b51f | 562 | if (slab) { |
f3e29105 NC |
563 | #ifdef PERL_DEBUG_READONLY_OPS |
564 | const size_t refcnt = slab->opslab_refcnt; | |
565 | #endif | |
3107b51f | 566 | OpslabREFCNT_dec(slab); |
f3e29105 | 567 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 568 | if (refcnt > 1) Slab_to_ro(slab); |
8be227ab | 569 | #endif |
f3e29105 | 570 | } |
7aef8e5b | 571 | } |
8be227ab | 572 | |
cc76b5cc Z |
573 | /* |
574 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
575 | ||
1a115e49 FC |
576 | Allocates a place in the currently-compiling |
577 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
578 | then stores a name for that entry. I<namesv> is adopted and becomes the |
579 | name entry; it must already contain the name string and be sufficiently | |
580 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
581 | added to I<namesv>. None of the other |
582 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
583 | is done. Returns the offset of the allocated pad slot. |
584 | ||
585 | =cut | |
586 | */ | |
587 | ||
3291825f | 588 | static PADOFFSET |
cc76b5cc | 589 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f | 590 | { |
3291825f NC |
591 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
592 | ||
cc76b5cc | 593 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 594 | |
cc76b5cc | 595 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
596 | |
597 | if (typestash) { | |
598 | assert(SvTYPE(namesv) == SVt_PVMG); | |
599 | SvPAD_TYPED_on(namesv); | |
600 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
601 | } | |
602 | if (ourstash) { | |
603 | SvPAD_OUR_on(namesv); | |
604 | SvOURSTASH_set(namesv, ourstash); | |
605 | SvREFCNT_inc_simple_void_NN(ourstash); | |
606 | } | |
59cfed7d | 607 | else if (flags & padadd_STATE) { |
3291825f NC |
608 | SvPAD_STATE_on(namesv); |
609 | } | |
610 | ||
611 | av_store(PL_comppad_name, offset, namesv); | |
7db6405c | 612 | PadnamelistMAXNAMED(PL_comppad_name) = offset; |
3291825f NC |
613 | return offset; |
614 | } | |
615 | ||
dd2155a4 | 616 | /* |
cc76b5cc | 617 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 618 | |
cc76b5cc Z |
619 | Allocates a place in the currently-compiling pad for a named lexical |
620 | variable. Stores the name and other metadata in the name part of the | |
621 | pad, and makes preparations to manage the variable's lexical scoping. | |
622 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 623 | |
cc76b5cc Z |
624 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
625 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
626 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
627 | to a package variable, and this identifies the package. The following | |
628 | flags can be OR'ed together: | |
629 | ||
630 | padadd_OUR redundantly specifies if it's a package var | |
631 | padadd_STATE variable will retain value persistently | |
632 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
633 | |
634 | =cut | |
635 | */ | |
636 | ||
dd2155a4 | 637 | PADOFFSET |
cc76b5cc Z |
638 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
639 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 640 | { |
3291825f | 641 | PADOFFSET offset; |
cca43f78 | 642 | SV *namesv; |
e8b34487 | 643 | bool is_utf8; |
dd2155a4 | 644 | |
cc76b5cc | 645 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 646 | |
2435e5d3 | 647 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 648 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
649 | (UV)flags); |
650 | ||
651 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
652 | |
653 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
654 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
655 | } | |
656 | ||
0727928e BF |
657 | sv_setpvn(namesv, namepv, namelen); |
658 | ||
e8b34487 BF |
659 | if (is_utf8) { |
660 | flags |= padadd_UTF8_NAME; | |
661 | SvUTF8_on(namesv); | |
662 | } | |
663 | else | |
664 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 665 | |
59cfed7d | 666 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
c2b36a6d FC |
667 | ENTER; |
668 | SAVEFREESV(namesv); /* in case of fatal warnings */ | |
2d12d04f | 669 | /* check for duplicate declaration */ |
59cfed7d | 670 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
c2b36a6d FC |
671 | SvREFCNT_inc_simple_void_NN(namesv); |
672 | LEAVE; | |
2d12d04f NC |
673 | } |
674 | ||
2435e5d3 | 675 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
676 | |
677 | /* not yet introduced */ | |
2df5bdd7 DM |
678 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
679 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
680 | |
681 | if (!PL_min_intro_pending) | |
682 | PL_min_intro_pending = offset; | |
683 | PL_max_intro_pending = offset; | |
684 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
685 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
686 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 687 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 688 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 689 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 | 690 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
6d5c2147 FC |
691 | else if (namelen != 0 && *namepv == '&') |
692 | sv_upgrade(PL_curpad[offset], SVt_PVCV); | |
c1bf42f3 | 693 | assert(SvPADMY(PL_curpad[offset])); |
3291825f NC |
694 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
695 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
696 | (long)offset, SvPVX(namesv), |
697 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
698 | |
699 | return offset; | |
700 | } | |
701 | ||
cc76b5cc Z |
702 | /* |
703 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 704 | |
cc76b5cc Z |
705 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
706 | instead of a string/length pair. | |
dd2155a4 | 707 | |
cc76b5cc Z |
708 | =cut |
709 | */ | |
710 | ||
711 | PADOFFSET | |
712 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 713 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
714 | { |
715 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
716 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
717 | } | |
dd2155a4 DM |
718 | |
719 | /* | |
cc76b5cc | 720 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 721 | |
cc76b5cc Z |
722 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
723 | of an SV instead of a string/length pair. | |
724 | ||
725 | =cut | |
726 | */ | |
727 | ||
728 | PADOFFSET | |
729 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
730 | { | |
731 | char *namepv; | |
732 | STRLEN namelen; | |
733 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
734 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
735 | if (SvUTF8(name)) |
736 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
737 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
738 | } | |
739 | ||
740 | /* | |
741 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
742 | ||
743 | Allocates a place in the currently-compiling pad, | |
744 | returning the offset of the allocated pad slot. | |
745 | No name is initially attached to the pad slot. | |
746 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
747 | which will be set in the value SV for the allocated pad entry: | |
748 | ||
749 | SVs_PADMY named lexical variable ("my", "our", "state") | |
750 | SVs_PADTMP unnamed temporary store | |
325e1816 FC |
751 | SVf_READONLY constant shared between recursion levels |
752 | ||
753 | C<SVf_READONLY> has been supported here only since perl 5.20. To work with | |
c370bd2e FC |
754 | earlier versions as well, use C<SVf_READONLY|SVs_PADTMP>. C<SVf_READONLY> |
755 | does not cause the SV in the pad slot to be marked read-only, but simply | |
756 | tells C<pad_alloc> that it I<will> be made read-only (by the caller), or at | |
757 | least should be treated as such. | |
cc76b5cc Z |
758 | |
759 | I<optype> should be an opcode indicating the type of operation that the | |
760 | pad entry is to support. This doesn't affect operational semantics, | |
761 | but is used for debugging. | |
dd2155a4 DM |
762 | |
763 | =cut | |
764 | */ | |
765 | ||
766 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
767 | * or at least rationalise ??? */ | |
dd2155a4 DM |
768 | |
769 | PADOFFSET | |
770 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
771 | { | |
772 | SV *sv; | |
773 | I32 retval; | |
774 | ||
6136c704 | 775 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
776 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
777 | ||
dd2155a4 | 778 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
779 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
780 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
781 | if (PL_pad_reset_pending) |
782 | pad_reset(); | |
c0683843 | 783 | if (tmptype == SVs_PADMY) { /* Not & because this ‘flag’ is 0. */ |
cc76b5cc | 784 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 785 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
786 | retval = AvFILLp(PL_comppad); |
787 | } | |
788 | else { | |
cc76b5cc Z |
789 | /* For a tmp, scan the pad from PL_padix upwards |
790 | * for a slot which has no name and no active value. | |
b54c5e14 | 791 | * For a constant, likewise, but use PL_constpadix. |
cc76b5cc | 792 | */ |
551405c4 | 793 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 794 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
b54c5e14 FC |
795 | const bool konst = cBOOL(tmptype & SVf_READONLY); |
796 | retval = konst ? PL_constpadix : PL_padix; | |
dd2155a4 DM |
797 | for (;;) { |
798 | /* | |
833bf1cd FC |
799 | * Entries that close over unavailable variables |
800 | * in outer subs contain values not marked PADMY. | |
801 | * Thus we must skip, not just pad values that are | |
dd2155a4 | 802 | * marked as current pad values, but also those with names. |
1780e744 FC |
803 | * If pad_reset is enabled, ‘current’ means different |
804 | * things depending on whether we are allocating a con- | |
805 | * stant or a target. For a target, things marked PADTMP | |
806 | * can be reused; not so for constants. | |
dd2155a4 | 807 | */ |
b54c5e14 FC |
808 | if (++retval <= names_fill && |
809 | (sv = names[retval]) && sv != &PL_sv_undef) | |
dd2155a4 | 810 | continue; |
b54c5e14 | 811 | sv = *av_fetch(PL_comppad, retval, TRUE); |
a90643eb | 812 | if (!(SvFLAGS(sv) & |
53de1311 | 813 | #ifdef USE_PAD_RESET |
145bf8ee | 814 | (konst ? SVs_PADTMP : 0)) |
a90643eb | 815 | #else |
145bf8ee | 816 | SVs_PADTMP |
a90643eb | 817 | #endif |
13381c39 | 818 | )) |
dd2155a4 DM |
819 | break; |
820 | } | |
b54c5e14 FC |
821 | if (konst) { |
822 | av_store(PL_comppad_name, retval, &PL_sv_no); | |
325e1816 FC |
823 | tmptype &= ~SVf_READONLY; |
824 | tmptype |= SVs_PADTMP; | |
825 | } | |
b54c5e14 | 826 | *(konst ? &PL_constpadix : &PL_padix) = retval; |
dd2155a4 DM |
827 | } |
828 | SvFLAGS(sv) |= tmptype; | |
829 | PL_curpad = AvARRAY(PL_comppad); | |
830 | ||
831 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
832 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
833 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
834 | PL_op_name[optype])); | |
fd0854ff DM |
835 | #ifdef DEBUG_LEAKING_SCALARS |
836 | sv->sv_debug_optype = optype; | |
837 | sv->sv_debug_inpad = 1; | |
fd0854ff | 838 | #endif |
a212c8b5 | 839 | return (PADOFFSET)retval; |
dd2155a4 DM |
840 | } |
841 | ||
842 | /* | |
cc76b5cc | 843 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 844 | |
cc76b5cc Z |
845 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
846 | for an anonymous function that is lexically scoped inside the | |
847 | currently-compiling function. | |
848 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
849 | to the outer scope is weakened to avoid a reference loop. | |
850 | ||
84eea980 FC |
851 | One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>. |
852 | ||
cc76b5cc Z |
853 | I<optype> should be an opcode indicating the type of operation that the |
854 | pad entry is to support. This doesn't affect operational semantics, | |
855 | but is used for debugging. | |
dd2155a4 DM |
856 | |
857 | =cut | |
858 | */ | |
859 | ||
860 | PADOFFSET | |
cc76b5cc | 861 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 DM |
862 | { |
863 | PADOFFSET ix; | |
b9f83d2f | 864 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
865 | |
866 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
867 | ||
1dba731d | 868 | pad_peg("add_anon"); |
76f68e9b | 869 | sv_setpvs(name, "&"); |
0d311cdb DM |
870 | /* These two aren't used; just make sure they're not equal to |
871 | * PERL_PADSEQ_INTRO */ | |
872 | COP_SEQ_RANGE_LOW_set(name, 0); | |
873 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 874 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 875 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 876 | /* XXX DAPM use PL_curpad[] ? */ |
e09ac076 FC |
877 | if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func)) |
878 | av_store(PL_comppad, ix, (SV*)func); | |
879 | else { | |
7c93c29b | 880 | SV *rv = newRV_noinc((SV *)func); |
e09ac076 FC |
881 | sv_rvweaken(rv); |
882 | assert (SvTYPE(func) == SVt_PVFM); | |
883 | av_store(PL_comppad, ix, rv); | |
884 | } | |
7dafbf52 DM |
885 | |
886 | /* to avoid ref loops, we never have parent + child referencing each | |
887 | * other simultaneously */ | |
e09ac076 | 888 | if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) { |
cc76b5cc Z |
889 | assert(!CvWEAKOUTSIDE(func)); |
890 | CvWEAKOUTSIDE_on(func); | |
fc2b2dca | 891 | SvREFCNT_dec_NN(CvOUTSIDE(func)); |
7dafbf52 | 892 | } |
dd2155a4 DM |
893 | return ix; |
894 | } | |
895 | ||
dd2155a4 | 896 | /* |
13087dd8 | 897 | =for apidoc pad_check_dup |
dd2155a4 DM |
898 | |
899 | Check for duplicate declarations: report any of: | |
13087dd8 | 900 | |
dd2155a4 | 901 | * a my in the current scope with the same name; |
13087dd8 FC |
902 | * an our (anywhere in the pad) with the same name and the |
903 | same stash as C<ourstash> | |
904 | ||
905 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
906 | |
907 | =cut | |
908 | */ | |
909 | ||
20381b50 | 910 | STATIC void |
cc76b5cc | 911 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 912 | { |
53c1dcc0 | 913 | SV **svp; |
dd2155a4 | 914 | PADOFFSET top, off; |
59cfed7d | 915 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 916 | |
7918f24d NC |
917 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
918 | ||
f3548bdc | 919 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 920 | |
59cfed7d | 921 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 922 | |
041457d9 | 923 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
924 | return; /* nothing to check */ |
925 | ||
926 | svp = AvARRAY(PL_comppad_name); | |
927 | top = AvFILLp(PL_comppad_name); | |
928 | /* check the current scope */ | |
929 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
930 | * type ? */ | |
931 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
932 | SV * const sv = svp[off]; |
933 | if (sv | |
325e1816 | 934 | && PadnameLEN(sv) |
ee6cee0c | 935 | && !SvFAKE(sv) |
0d311cdb DM |
936 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
937 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 938 | && sv_eq(name, sv)) |
dd2155a4 | 939 | { |
00b1698f | 940 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 941 | break; /* "our" masking "our" */ |
4eb94d7c | 942 | /* diag_listed_as: "%s" variable %s masks earlier declaration in same %s */ |
dd2155a4 | 943 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
4eb94d7c | 944 | "\"%s\" %s %"SVf" masks earlier declaration in same %s", |
12bd6ede | 945 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
4eb94d7c | 946 | *SvPVX(sv) == '&' ? "subroutine" : "variable", |
c1f6cd39 | 947 | SVfARG(sv), |
2df5bdd7 DM |
948 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
949 | ? "scope" : "statement")); | |
dd2155a4 DM |
950 | --off; |
951 | break; | |
952 | } | |
953 | } | |
954 | /* check the rest of the pad */ | |
955 | if (is_our) { | |
61c5492a | 956 | while (off > 0) { |
53c1dcc0 AL |
957 | SV * const sv = svp[off]; |
958 | if (sv | |
325e1816 | 959 | && PadnameLEN(sv) |
ee6cee0c | 960 | && !SvFAKE(sv) |
0d311cdb DM |
961 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
962 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 963 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 964 | && sv_eq(name, sv)) |
dd2155a4 DM |
965 | { |
966 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c1f6cd39 | 967 | "\"our\" variable %"SVf" redeclared", SVfARG(sv)); |
624f69f5 | 968 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
969 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
970 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
971 | break; |
972 | } | |
61c5492a NC |
973 | --off; |
974 | } | |
dd2155a4 DM |
975 | } |
976 | } | |
977 | ||
978 | ||
dd2155a4 | 979 | /* |
cc76b5cc | 980 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 981 | |
cc76b5cc Z |
982 | Given the name of a lexical variable, find its position in the |
983 | currently-compiling pad. | |
984 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
985 | I<flags> is reserved and must be zero. | |
986 | If it is not in the current pad but appears in the pad of any lexically | |
987 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
988 | Returns the offset in the current pad, | |
989 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
990 | |
991 | =cut | |
992 | */ | |
993 | ||
994 | PADOFFSET | |
cc76b5cc | 995 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 996 | { |
b5c19bd7 DM |
997 | SV *out_sv; |
998 | int out_flags; | |
929a0744 | 999 | I32 offset; |
e1ec3a88 | 1000 | const AV *nameav; |
929a0744 | 1001 | SV **name_svp; |
dd2155a4 | 1002 | |
cc76b5cc | 1003 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 1004 | |
cc76b5cc | 1005 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 1006 | |
2435e5d3 | 1007 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 1008 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
1009 | (UV)flags); |
1010 | ||
e8b34487 BF |
1011 | if (flags & padadd_UTF8_NAME) { |
1012 | bool is_utf8 = TRUE; | |
1013 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
1014 | ||
1015 | if (is_utf8) | |
1016 | flags |= padadd_UTF8_NAME; | |
1017 | else | |
1018 | flags &= ~padadd_UTF8_NAME; | |
1019 | } | |
1020 | ||
fbb889c8 BF |
1021 | offset = pad_findlex(namepv, namelen, flags, |
1022 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 1023 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
1024 | return offset; |
1025 | ||
f0727190 FC |
1026 | /* Skip the ‘our’ hack for subroutines, as the warning does not apply. |
1027 | */ | |
1028 | if (*namepv == '&') return NOT_IN_PAD; | |
1029 | ||
929a0744 DM |
1030 | /* look for an our that's being introduced; this allows |
1031 | * our $foo = 0 unless defined $foo; | |
1032 | * to not give a warning. (Yes, this is a hack) */ | |
1033 | ||
86d2498c | 1034 | nameav = PadlistARRAY(CvPADLIST(PL_compcv))[0]; |
929a0744 | 1035 | name_svp = AvARRAY(nameav); |
7f713aaa | 1036 | for (offset = PadnamelistMAXNAMED(nameav); offset > 0; offset--) { |
551405c4 | 1037 | const SV * const namesv = name_svp[offset]; |
325e1816 | 1038 | if (namesv && PadnameLEN(namesv) == namelen |
929a0744 | 1039 | && !SvFAKE(namesv) |
00b1698f | 1040 | && (SvPAD_OUR(namesv)) |
e8b34487 BF |
1041 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1042 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 1043 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
1044 | ) |
1045 | return offset; | |
1046 | } | |
1047 | return NOT_IN_PAD; | |
dd2155a4 DM |
1048 | } |
1049 | ||
e1f795dc | 1050 | /* |
cc76b5cc Z |
1051 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
1052 | ||
1053 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
1054 | instead of a string/length pair. | |
1055 | ||
1056 | =cut | |
1057 | */ | |
1058 | ||
1059 | PADOFFSET | |
1060 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
1061 | { | |
1062 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
1063 | return pad_findmy_pvn(name, strlen(name), flags); | |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
1068 | ||
1069 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
1070 | of an SV instead of a string/length pair. | |
1071 | ||
1072 | =cut | |
1073 | */ | |
1074 | ||
1075 | PADOFFSET | |
1076 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1077 | { | |
1078 | char *namepv; | |
1079 | STRLEN namelen; | |
1080 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
1081 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
1082 | if (SvUTF8(name)) |
1083 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
1084 | return pad_findmy_pvn(namepv, namelen, flags); |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1089 | ||
1090 | Find the position of the lexical C<$_> in the pad of the | |
1091 | currently-executing function. Returns the offset in the current pad, | |
1092 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1093 | the global one should be used instead). | |
1094 | L</find_rundefsv> is likely to be more convenient. | |
1095 | ||
1096 | =cut | |
1097 | */ | |
e1f795dc RGS |
1098 | |
1099 | PADOFFSET | |
29289021 | 1100 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc RGS |
1101 | { |
1102 | SV *out_sv; | |
1103 | int out_flags; | |
fbb889c8 | 1104 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 1105 | NULL, &out_sv, &out_flags); |
e1f795dc | 1106 | } |
dd2155a4 | 1107 | |
dd2155a4 | 1108 | /* |
cc76b5cc Z |
1109 | =for apidoc Am|SV *|find_rundefsv |
1110 | ||
1111 | Find and return the variable that is named C<$_> in the lexical scope | |
1112 | of the currently-executing function. This may be a lexical C<$_>, | |
1113 | or will otherwise be the global one. | |
1114 | ||
1115 | =cut | |
1116 | */ | |
789bd863 VP |
1117 | |
1118 | SV * | |
1119 | Perl_find_rundefsv(pTHX) | |
1120 | { | |
1121 | SV *namesv; | |
1122 | int flags; | |
1123 | PADOFFSET po; | |
1124 | ||
fbb889c8 | 1125 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
1126 | NULL, &namesv, &flags); |
1127 | ||
1979170b | 1128 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
1129 | return DEFSV; |
1130 | ||
1131 | return PAD_SVl(po); | |
1132 | } | |
1133 | ||
c086f97a FC |
1134 | SV * |
1135 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1136 | { | |
1137 | SV *namesv; | |
1138 | int flags; | |
1139 | PADOFFSET po; | |
1140 | ||
1141 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1142 | ||
1143 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1144 | NULL, &namesv, &flags); | |
1145 | ||
1146 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1147 | return DEFSV; | |
1148 | ||
86d2498c | 1149 | return AvARRAY(PadlistARRAY(CvPADLIST(cv))[CvDEPTH(cv)])[po]; |
c086f97a FC |
1150 | } |
1151 | ||
789bd863 | 1152 | /* |
fbb889c8 | 1153 | =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 | 1154 | |
72d33970 | 1155 | Find a named lexical anywhere in a chain of nested pads. Add fake entries |
b5c19bd7 DM |
1156 | in the inner pads if it's found in an outer one. |
1157 | ||
1158 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1159 | cv is the CV in which to start the search, and seq is the current cop_seq | |
72d33970 | 1160 | to match against. If warn is true, print appropriate warnings. The out_* |
b5c19bd7 | 1161 | vars return values, and so are pointers to where the returned values |
72d33970 | 1162 | should be stored. out_capture, if non-null, requests that the innermost |
b5c19bd7 DM |
1163 | instance of the lexical is captured; out_name_sv is set to the innermost |
1164 | matched namesv or fake namesv; out_flags returns the flags normally | |
1165 | associated with the IVX field of a fake namesv. | |
1166 | ||
1167 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
72d33970 FC |
1168 | then comes back down, adding fake entries |
1169 | as it goes. It has to be this way | |
3441fb63 | 1170 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1171 | the parent pad. |
dd2155a4 DM |
1172 | |
1173 | =cut | |
1174 | */ | |
1175 | ||
b5c19bd7 DM |
1176 | /* the CV has finished being compiled. This is not a sufficient test for |
1177 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1178 | #define CvCOMPILED(cv) CvROOT(cv) | |
1179 | ||
71f882da | 1180 | /* the CV does late binding of its lexicals */ |
e07561e6 | 1181 | #define CvLATE(cv) (CvANON(cv) || CvCLONE(cv) || SvTYPE(cv) == SVt_PVFM) |
71f882da | 1182 | |
445f13ff FC |
1183 | static void |
1184 | S_unavailable(pTHX_ SV *namesv) | |
1185 | { | |
1186 | /* diag_listed_as: Variable "%s" is not available */ | |
1187 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
1188 | "%se \"%"SVf"\" is not available", | |
1189 | *SvPVX_const(namesv) == '&' | |
1190 | ? "Subroutin" | |
1191 | : "Variabl", | |
c1f6cd39 | 1192 | SVfARG(namesv)); |
445f13ff | 1193 | } |
b5c19bd7 | 1194 | |
dd2155a4 | 1195 | STATIC PADOFFSET |
fbb889c8 | 1196 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1197 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1198 | { |
b5c19bd7 DM |
1199 | I32 offset, new_offset; |
1200 | SV *new_capture; | |
1201 | SV **new_capturep; | |
b70d5558 | 1202 | const PADLIST * const padlist = CvPADLIST(cv); |
7ef30830 | 1203 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1204 | |
7918f24d NC |
1205 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1206 | ||
7ef30830 | 1207 | if (flags & ~(padadd_UTF8_NAME|padadd_STALEOK)) |
2435e5d3 BF |
1208 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1209 | (UV)flags); | |
7ef30830 | 1210 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
2435e5d3 | 1211 | |
b5c19bd7 | 1212 | *out_flags = 0; |
a3985cdc | 1213 | |
b5c19bd7 | 1214 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1215 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1216 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1217 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1218 | |
b5c19bd7 | 1219 | /* first, search this pad */ |
dd2155a4 | 1220 | |
b5c19bd7 DM |
1221 | if (padlist) { /* not an undef CV */ |
1222 | I32 fake_offset = 0; | |
86d2498c | 1223 | const AV * const nameav = PadlistARRAY(padlist)[0]; |
551405c4 | 1224 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1225 | |
7db6405c | 1226 | for (offset = PadnamelistMAXNAMED(nameav); offset > 0; offset--) { |
551405c4 | 1227 | const SV * const namesv = name_svp[offset]; |
325e1816 | 1228 | if (namesv && PadnameLEN(namesv) == namelen |
e8b34487 BF |
1229 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1230 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1231 | { |
6012dc80 | 1232 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1233 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1234 | continue; |
1235 | } | |
1236 | /* is seq within the range _LOW to _HIGH ? | |
1237 | * This is complicated by the fact that PL_cop_seqmax | |
1238 | * may have wrapped around at some point */ | |
1239 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1240 | continue; /* not yet introduced */ | |
1241 | ||
1242 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1243 | /* in compiling scope */ | |
1244 | if ( | |
1245 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1246 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1247 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1248 | ) | |
1249 | break; | |
1250 | } | |
1251 | else if ( | |
1252 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1253 | ? | |
1254 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1255 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1256 | ||
1257 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1258 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1259 | ) | |
1260 | break; | |
ee6cee0c DM |
1261 | } |
1262 | } | |
1263 | ||
b5c19bd7 DM |
1264 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1265 | if (offset > 0) { /* not fake */ | |
1266 | fake_offset = 0; | |
1267 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1268 | ||
1269 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1270 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1271 | * ideally, we should detect my's declared within loops | |
1272 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1273 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1274 | * lexes as not multi as viewed from evals. */ |
1275 | ||
1276 | *out_flags = CvANON(cv) ? | |
1277 | PAD_FAKELEX_ANON : | |
1278 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1279 | ? PAD_FAKELEX_MULTI : 0; | |
1280 | ||
1281 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1282 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1283 | PTR2UV(cv), (long)offset, | |
1284 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1285 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1286 | } |
1287 | else { /* fake match */ | |
1288 | offset = fake_offset; | |
1289 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1290 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1291 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1292 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1293 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1294 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1295 | )); |
1296 | } | |
dd2155a4 | 1297 | |
b5c19bd7 | 1298 | /* return the lex? */ |
dd2155a4 | 1299 | |
b5c19bd7 | 1300 | if (out_capture) { |
dd2155a4 | 1301 | |
b5c19bd7 | 1302 | /* our ? */ |
00b1698f | 1303 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1304 | *out_capture = NULL; |
b5c19bd7 DM |
1305 | return offset; |
1306 | } | |
ee6cee0c | 1307 | |
b5c19bd7 DM |
1308 | /* trying to capture from an anon prototype? */ |
1309 | if (CvCOMPILED(cv) | |
1310 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1311 | : *out_flags & PAD_FAKELEX_ANON) | |
1312 | { | |
a2a5de95 | 1313 | if (warn) |
445f13ff | 1314 | S_unavailable(aTHX_ |
0727928e BF |
1315 | newSVpvn_flags(namepv, namelen, |
1316 | SVs_TEMP | | |
1317 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1318 | ||
a0714e2c | 1319 | *out_capture = NULL; |
b5c19bd7 | 1320 | } |
ee6cee0c | 1321 | |
b5c19bd7 DM |
1322 | /* real value */ |
1323 | else { | |
1324 | int newwarn = warn; | |
1325 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1326 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1327 | && warn && ckWARN(WARN_CLOSURE)) { |
1328 | newwarn = 0; | |
1329 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e | 1330 | "Variable \"%"SVf"\" will not stay shared", |
c1f6cd39 | 1331 | SVfARG(newSVpvn_flags(namepv, namelen, |
0727928e | 1332 | SVs_TEMP | |
c1f6cd39 | 1333 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)))); |
b5c19bd7 | 1334 | } |
dd2155a4 | 1335 | |
b5c19bd7 DM |
1336 | if (fake_offset && CvANON(cv) |
1337 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1338 | { | |
1339 | SV *n; | |
1340 | /* not yet caught - look further up */ | |
1341 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1342 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1343 | PTR2UV(cv))); | |
1344 | n = *out_name_sv; | |
fbb889c8 | 1345 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1346 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1347 | newwarn, out_capture, out_name_sv, out_flags); |
1348 | *out_name_sv = n; | |
1349 | return offset; | |
dd2155a4 | 1350 | } |
b5c19bd7 | 1351 | |
86d2498c | 1352 | *out_capture = AvARRAY(PadlistARRAY(padlist)[ |
7261499d | 1353 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; |
b5c19bd7 DM |
1354 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1355 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1356 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1357 | |
d1186544 | 1358 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1359 | && (!CvDEPTH(cv) || !staleok) |
d1186544 DM |
1360 | && !SvPAD_STATE(name_svp[offset])) |
1361 | { | |
445f13ff | 1362 | S_unavailable(aTHX_ |
0727928e BF |
1363 | newSVpvn_flags(namepv, namelen, |
1364 | SVs_TEMP | | |
1365 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1366 | *out_capture = NULL; |
dd2155a4 DM |
1367 | } |
1368 | } | |
b5c19bd7 | 1369 | if (!*out_capture) { |
cc76b5cc | 1370 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1371 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1372 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1373 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
6d5c2147 FC |
1374 | else if (namelen != 0 && *namepv == '&') |
1375 | *out_capture = sv_2mortal(newSV_type(SVt_PVCV)); | |
b5c19bd7 DM |
1376 | else |
1377 | *out_capture = sv_newmortal(); | |
1378 | } | |
dd2155a4 | 1379 | } |
b5c19bd7 DM |
1380 | |
1381 | return offset; | |
ee6cee0c | 1382 | } |
b5c19bd7 DM |
1383 | } |
1384 | ||
1385 | /* it's not in this pad - try above */ | |
1386 | ||
1387 | if (!CvOUTSIDE(cv)) | |
1388 | return NOT_IN_PAD; | |
9f7d9405 | 1389 | |
b5c19bd7 | 1390 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1391 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1392 | new_capturep = out_capture ? out_capture : |
4608196e | 1393 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1394 | |
7ef30830 FC |
1395 | offset = pad_findlex(namepv, namelen, |
1396 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1397 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
b5c19bd7 | 1398 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1399 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1400 | return NOT_IN_PAD; |
9f7d9405 | 1401 | |
b5c19bd7 DM |
1402 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1403 | ||
1404 | /* don't add new fake entries (via eval) to CVs that we have already | |
1405 | * finished compiling, or to undef CVs */ | |
1406 | if (CvCOMPILED(cv) || !padlist) | |
1407 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1408 | ||
1409 | { | |
3291825f | 1410 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1411 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1412 | "good" and only copying flag bits and pointers that it understands. |
1413 | */ | |
1414 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1415 | AV * const ocomppad_name = PL_comppad_name; |
1416 | PAD * const ocomppad = PL_comppad; | |
86d2498c FC |
1417 | PL_comppad_name = PadlistARRAY(padlist)[0]; |
1418 | PL_comppad = PadlistARRAY(padlist)[1]; | |
b5c19bd7 DM |
1419 | PL_curpad = AvARRAY(PL_comppad); |
1420 | ||
3291825f | 1421 | new_offset |
cc76b5cc | 1422 | = pad_alloc_name(new_namesv, |
59cfed7d | 1423 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1424 | SvPAD_TYPED(*out_name_sv) |
1425 | ? SvSTASH(*out_name_sv) : NULL, | |
1426 | SvOURSTASH(*out_name_sv) | |
1427 | ); | |
1428 | ||
1429 | SvFAKE_on(new_namesv); | |
1430 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1431 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1432 | (long)new_offset, | |
1433 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1434 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1435 | |
809abb02 | 1436 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1437 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1438 | NOOP; /* do nothing */ |
b5c19bd7 | 1439 | } |
71f882da | 1440 | else if (CvLATE(cv)) { |
b5c19bd7 | 1441 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1442 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1443 | CvCLONE_on(cv); |
1444 | } | |
1445 | else { | |
1446 | /* immediate creation - capture outer value right now */ | |
1447 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
81df9f6f FC |
1448 | /* But also note the offset, as newMYSUB needs it */ |
1449 | PARENT_PAD_INDEX_set(new_namesv, offset); | |
b5c19bd7 DM |
1450 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1451 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1452 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1453 | } |
b5c19bd7 | 1454 | *out_name_sv = new_namesv; |
809abb02 | 1455 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1456 | |
1457 | PL_comppad_name = ocomppad_name; | |
1458 | PL_comppad = ocomppad; | |
4608196e | 1459 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1460 | } |
b5c19bd7 | 1461 | return new_offset; |
dd2155a4 DM |
1462 | } |
1463 | ||
fb8a9836 | 1464 | #ifdef DEBUGGING |
cc76b5cc | 1465 | |
dd2155a4 | 1466 | /* |
cc76b5cc | 1467 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1468 | |
cc76b5cc | 1469 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1470 | Use macro PAD_SV instead of calling this function directly. |
1471 | ||
1472 | =cut | |
1473 | */ | |
1474 | ||
dd2155a4 DM |
1475 | SV * |
1476 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1477 | { | |
f3548bdc | 1478 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1479 | |
dd2155a4 DM |
1480 | if (!po) |
1481 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1482 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1483 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1484 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1485 | ); |
1486 | return PL_curpad[po]; | |
1487 | } | |
1488 | ||
dd2155a4 | 1489 | /* |
cc76b5cc | 1490 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1491 | |
cc76b5cc | 1492 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1493 | Use the macro PAD_SETSV() rather than calling this function directly. |
1494 | ||
1495 | =cut | |
1496 | */ | |
1497 | ||
dd2155a4 DM |
1498 | void |
1499 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1500 | { | |
7918f24d NC |
1501 | PERL_ARGS_ASSERT_PAD_SETSV; |
1502 | ||
f3548bdc | 1503 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1504 | |
1505 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1506 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1507 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1508 | ); |
1509 | PL_curpad[po] = sv; | |
1510 | } | |
dd2155a4 | 1511 | |
cc76b5cc | 1512 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1513 | |
1514 | /* | |
cc76b5cc | 1515 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 | 1516 | |
e89fca5e | 1517 | Update the pad compilation state variables on entry to a new block. |
dd2155a4 DM |
1518 | |
1519 | =cut | |
1520 | */ | |
1521 | ||
1522 | /* XXX DAPM perhaps: | |
1523 | * - integrate this in general state-saving routine ??? | |
1524 | * - combine with the state-saving going on in pad_new ??? | |
1525 | * - introduce a new SAVE type that does all this in one go ? | |
1526 | */ | |
1527 | ||
1528 | void | |
1529 | Perl_pad_block_start(pTHX_ int full) | |
1530 | { | |
f3548bdc | 1531 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1532 | SAVEI32(PL_comppad_name_floor); |
1533 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1534 | if (full) | |
1535 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1536 | if (PL_comppad_name_floor < 0) | |
1537 | PL_comppad_name_floor = 0; | |
1538 | SAVEI32(PL_min_intro_pending); | |
1539 | SAVEI32(PL_max_intro_pending); | |
1540 | PL_min_intro_pending = 0; | |
1541 | SAVEI32(PL_comppad_name_fill); | |
1542 | SAVEI32(PL_padix_floor); | |
1780e744 FC |
1543 | /* PL_padix_floor is what PL_padix is reset to at the start of each |
1544 | statement, by pad_reset(). We set it when entering a new scope | |
1545 | to keep things like this working: | |
1546 | print "$foo$bar", do { this(); that() . "foo" }; | |
1547 | We must not let "$foo$bar" and the later concatenation share the | |
1548 | same target. */ | |
dd2155a4 DM |
1549 | PL_padix_floor = PL_padix; |
1550 | PL_pad_reset_pending = FALSE; | |
1551 | } | |
1552 | ||
dd2155a4 | 1553 | /* |
25f5d540 | 1554 | =for apidoc Am|U32|intro_my |
dd2155a4 | 1555 | |
25f5d540 LM |
1556 | "Introduce" C<my> variables to visible status. This is called during parsing |
1557 | at the end of each statement to make lexical variables visible to subsequent | |
1558 | statements. | |
dd2155a4 DM |
1559 | |
1560 | =cut | |
1561 | */ | |
1562 | ||
1563 | U32 | |
1564 | Perl_intro_my(pTHX) | |
1565 | { | |
1566 | SV **svp; | |
dd2155a4 | 1567 | I32 i; |
6012dc80 | 1568 | U32 seq; |
dd2155a4 | 1569 | |
f3548bdc | 1570 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1571 | if (! PL_min_intro_pending) |
1572 | return PL_cop_seqmax; | |
1573 | ||
1574 | svp = AvARRAY(PL_comppad_name); | |
1575 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1576 | SV * const sv = svp[i]; |
1577 | ||
325e1816 | 1578 | if (sv && PadnameLEN(sv) && !SvFAKE(sv) |
0d311cdb DM |
1579 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) |
1580 | { | |
2df5bdd7 | 1581 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1582 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1583 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1584 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1585 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1586 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1587 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1588 | ); |
1589 | } | |
1590 | } | |
6012dc80 DM |
1591 | seq = PL_cop_seqmax; |
1592 | PL_cop_seqmax++; | |
1593 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1594 | PL_cop_seqmax++; | |
dd2155a4 DM |
1595 | PL_min_intro_pending = 0; |
1596 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1597 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1598 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1599 | |
6012dc80 | 1600 | return seq; |
dd2155a4 DM |
1601 | } |
1602 | ||
1603 | /* | |
cc76b5cc | 1604 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1605 | |
1606 | Cleanup at end of scope during compilation: set the max seq number for | |
1607 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1608 | ||
1609 | =cut | |
1610 | */ | |
1611 | ||
6d5c2147 | 1612 | OP * |
dd2155a4 DM |
1613 | Perl_pad_leavemy(pTHX) |
1614 | { | |
1615 | I32 off; | |
6d5c2147 | 1616 | OP *o = NULL; |
551405c4 | 1617 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1618 | |
1619 | PL_pad_reset_pending = FALSE; | |
1620 | ||
f3548bdc | 1621 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1622 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1623 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1624 | const SV * const sv = svp[off]; |
325e1816 | 1625 | if (sv && PadnameLEN(sv) && !SvFAKE(sv)) |
9b387841 NC |
1626 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1627 | "%"SVf" never introduced", | |
1628 | SVfARG(sv)); | |
dd2155a4 DM |
1629 | } |
1630 | } | |
1631 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1632 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
6d5c2147 | 1633 | SV * const sv = svp[off]; |
325e1816 | 1634 | if (sv && PadnameLEN(sv) && !SvFAKE(sv) |
2df5bdd7 DM |
1635 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) |
1636 | { | |
809abb02 | 1637 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1638 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1639 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1640 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1641 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1642 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 | 1643 | ); |
6d5c2147 FC |
1644 | if (!PadnameIsSTATE(sv) && !PadnameIsOUR(sv) |
1645 | && *PadnamePV(sv) == '&' && PadnameLEN(sv) > 1) { | |
1646 | OP *kid = newOP(OP_INTROCV, 0); | |
1647 | kid->op_targ = off; | |
1648 | o = op_prepend_elem(OP_LINESEQ, kid, o); | |
1649 | } | |
dd2155a4 DM |
1650 | } |
1651 | } | |
1652 | PL_cop_seqmax++; | |
6012dc80 DM |
1653 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1654 | PL_cop_seqmax++; | |
dd2155a4 DM |
1655 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1656 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
6d5c2147 | 1657 | return o; |
dd2155a4 DM |
1658 | } |
1659 | ||
dd2155a4 | 1660 | /* |
cc76b5cc | 1661 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1662 | |
1663 | Abandon the tmp in the current pad at offset po and replace with a | |
1664 | new one. | |
1665 | ||
1666 | =cut | |
1667 | */ | |
1668 | ||
1669 | void | |
1670 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1671 | { | |
f3548bdc | 1672 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1673 | if (!PL_curpad) |
1674 | return; | |
1675 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1676 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1677 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1678 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1679 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1680 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1681 | |
1682 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1683 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1684 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1685 | ||
dd2155a4 DM |
1686 | if (refadjust) |
1687 | SvREFCNT_dec(PL_curpad[po]); | |
1688 | ||
9ad9869c DM |
1689 | |
1690 | /* if pad tmps aren't shared between ops, then there's no need to | |
1691 | * create a new tmp when an existing op is freed */ | |
53de1311 | 1692 | #ifdef USE_PAD_RESET |
561b68a9 | 1693 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1694 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c | 1695 | #else |
ce0d59fd | 1696 | PL_curpad[po] = NULL; |
97bf4a8d | 1697 | #endif |
325e1816 | 1698 | if (PadnamelistMAX(PL_comppad_name) != -1 |
4891fdfa | 1699 | && (PADOFFSET)PadnamelistMAX(PL_comppad_name) >= po) { |
ce0d59fd FC |
1700 | if (PadnamelistARRAY(PL_comppad_name)[po]) { |
1701 | assert(!PadnameLEN(PadnamelistARRAY(PL_comppad_name)[po])); | |
1702 | } | |
325e1816 FC |
1703 | PadnamelistARRAY(PL_comppad_name)[po] = &PL_sv_undef; |
1704 | } | |
b54c5e14 FC |
1705 | /* Use PL_constpadix here, not PL_padix. The latter may have been |
1706 | reset by pad_reset. We don’t want pad_alloc to have to scan the | |
1707 | whole pad when allocating a constant. */ | |
1708 | if ((I32)po < PL_constpadix) | |
1709 | PL_constpadix = po - 1; | |
dd2155a4 DM |
1710 | } |
1711 | ||
dd2155a4 | 1712 | /* |
cc76b5cc | 1713 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1714 | |
1715 | Mark all the current temporaries for reuse | |
1716 | ||
1717 | =cut | |
1718 | */ | |
1719 | ||
1780e744 FC |
1720 | /* pad_reset() causes pad temp TARGs (operator targets) to be shared |
1721 | * between OPs from different statements. During compilation, at the start | |
1722 | * of each statement pad_reset resets PL_padix back to its previous value. | |
1723 | * When allocating a target, pad_alloc begins its scan through the pad at | |
1724 | * PL_padix+1. */ | |
1f676739 | 1725 | static void |
82af08ae | 1726 | S_pad_reset(pTHX) |
dd2155a4 | 1727 | { |
53de1311 | 1728 | #ifdef USE_PAD_RESET |
dd2155a4 | 1729 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1730 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1731 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1732 | |
1733 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1734 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1735 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1736 | (long)PL_padix, (long)PL_padix_floor | |
1737 | ) | |
1738 | ); | |
1739 | ||
284167a5 | 1740 | if (!TAINTING_get) { /* Can't mix tainted and non-tainted temporaries. */ |
dd2155a4 DM |
1741 | PL_padix = PL_padix_floor; |
1742 | } | |
1743 | #endif | |
1744 | PL_pad_reset_pending = FALSE; | |
1745 | } | |
1746 | ||
dd2155a4 | 1747 | /* |
cc76b5cc Z |
1748 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1749 | ||
1750 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1751 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1752 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1753 | the kind of subroutine: | |
dd2155a4 | 1754 | |
cc76b5cc Z |
1755 | padtidy_SUB ordinary subroutine |
1756 | padtidy_SUBCLONE prototype for lexical closure | |
1757 | padtidy_FORMAT format | |
dd2155a4 DM |
1758 | |
1759 | =cut | |
1760 | */ | |
1761 | ||
1762 | /* XXX DAPM surely most of this stuff should be done properly | |
1763 | * at the right time beforehand, rather than going around afterwards | |
1764 | * cleaning up our mistakes ??? | |
1765 | */ | |
1766 | ||
1767 | void | |
1768 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1769 | { | |
27da23d5 | 1770 | dVAR; |
dd2155a4 | 1771 | |
f3548bdc | 1772 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 | 1773 | |
db21619c DM |
1774 | /* If this CV has had any 'eval-capable' ops planted in it: |
1775 | * i.e. it contains any of: | |
1776 | * | |
1777 | * * eval '...', | |
1778 | * * //ee, | |
1779 | * * use re 'eval'; /$var/ | |
1780 | * * /(?{..})/), | |
1781 | * | |
1782 | * Then any anon prototypes in the chain of CVs should be marked as | |
1783 | * cloneable, so that for example the eval's CV in | |
1784 | * | |
1785 | * sub { eval '$x' } | |
1786 | * | |
1787 | * gets the right CvOUTSIDE. If running with -d, *any* sub may | |
1788 | * potentially have an eval executed within it. | |
b5c19bd7 DM |
1789 | */ |
1790 | ||
1791 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1792 | const CV *cv; |
b5c19bd7 DM |
1793 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1794 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1795 | break; /* no need to mark already-compiled code */ | |
1796 | if (CvANON(cv)) { | |
1797 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1798 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1799 | CvCLONE_on(cv); | |
1800 | } | |
00cc8743 | 1801 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1802 | } |
1803 | } | |
1804 | ||
eb8137a9 | 1805 | /* extend namepad to match curpad */ |
dd2155a4 | 1806 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) |
a0714e2c | 1807 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1808 | |
1809 | if (type == padtidy_SUBCLONE) { | |
ce0d59fd | 1810 | SV ** const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1811 | PADOFFSET ix; |
b5c19bd7 | 1812 | |
dd2155a4 DM |
1813 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1814 | SV *namesv; | |
ce0d59fd | 1815 | if (!namep[ix]) namep[ix] = &PL_sv_undef; |
dd2155a4 | 1816 | |
dd2155a4 DM |
1817 | /* |
1818 | * The only things that a clonable function needs in its | |
3a6ce63a | 1819 | * pad are anonymous subs, constants and GVs. |
dd2155a4 DM |
1820 | * The rest are created anew during cloning. |
1821 | */ | |
b561f196 | 1822 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix])) |
3a6ce63a | 1823 | continue; |
ce0d59fd FC |
1824 | namesv = namep[ix]; |
1825 | if (!(PadnamePV(namesv) && | |
3a6ce63a | 1826 | (!PadnameLEN(namesv) || *SvPVX_const(namesv) == '&'))) |
dd2155a4 DM |
1827 | { |
1828 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1829 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1830 | } |
1831 | } | |
1832 | } | |
1833 | else if (type == padtidy_SUB) { | |
1834 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1835 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1836 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1837 | AvREIFY_only(av); |
dd2155a4 DM |
1838 | } |
1839 | ||
4cee4ca8 | 1840 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
ce0d59fd | 1841 | SV ** const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1842 | PADOFFSET ix; |
dd2155a4 | 1843 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
ce0d59fd | 1844 | if (!namep[ix]) namep[ix] = &PL_sv_undef; |
2347c8c0 | 1845 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix])) |
dd2155a4 | 1846 | continue; |
e52eb89d | 1847 | if (SvPADMY(PL_curpad[ix]) && !SvFAKE(namep[ix])) { |
adf8f095 NC |
1848 | /* This is a work around for how the current implementation of |
1849 | ?{ } blocks in regexps interacts with lexicals. | |
1850 | ||
1851 | One of our lexicals. | |
1852 | Can't do this on all lexicals, otherwise sub baz() won't | |
1853 | compile in | |
1854 | ||
1855 | my $foo; | |
1856 | ||
1857 | sub bar { ++$foo; } | |
1858 | ||
1859 | sub baz { ++$foo; } | |
1860 | ||
1861 | because completion of compiling &bar calling pad_tidy() | |
1862 | would cause (top level) $foo to be marked as stale, and | |
1863 | "no longer available". */ | |
1864 | SvPADSTALE_on(PL_curpad[ix]); | |
1865 | } | |
dd2155a4 DM |
1866 | } |
1867 | } | |
f3548bdc | 1868 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1869 | } |
1870 | ||
dd2155a4 | 1871 | /* |
cc76b5cc | 1872 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1873 | |
8627550a | 1874 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1875 | |
1876 | =cut | |
1877 | */ | |
1878 | ||
1879 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1880 | void | |
1881 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1882 | { | |
53de1311 | 1883 | #ifndef USE_PAD_RESET |
ad9e6ae1 | 1884 | SV *sv; |
ff06c6b2 | 1885 | #endif |
f3548bdc | 1886 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1887 | if (!PL_curpad) |
1888 | return; | |
1889 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1890 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1891 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1892 | if (!po) |
1893 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1894 | ||
1895 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1896 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1897 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1898 | ); | |
1899 | ||
53de1311 | 1900 | #ifndef USE_PAD_RESET |
ad9e6ae1 DM |
1901 | sv = PL_curpad[po]; |
1902 | if (sv && sv != &PL_sv_undef && !SvPADMY(sv)) | |
1903 | SvFLAGS(sv) &= ~SVs_PADTMP; | |
1904 | ||
dd2155a4 DM |
1905 | if ((I32)po < PL_padix) |
1906 | PL_padix = po - 1; | |
53d3c048 | 1907 | #endif |
dd2155a4 DM |
1908 | } |
1909 | ||
dd2155a4 | 1910 | /* |
cc76b5cc | 1911 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1912 | |
1913 | Dump the contents of a padlist | |
1914 | ||
1915 | =cut | |
1916 | */ | |
1917 | ||
1918 | void | |
1919 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1920 | { | |
e1ec3a88 AL |
1921 | const AV *pad_name; |
1922 | const AV *pad; | |
dd2155a4 DM |
1923 | SV **pname; |
1924 | SV **ppad; | |
dd2155a4 DM |
1925 | I32 ix; |
1926 | ||
7918f24d NC |
1927 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1928 | ||
dd2155a4 DM |
1929 | if (!padlist) { |
1930 | return; | |
1931 | } | |
86d2498c FC |
1932 | pad_name = *PadlistARRAY(padlist); |
1933 | pad = PadlistARRAY(padlist)[1]; | |
dd2155a4 DM |
1934 | pname = AvARRAY(pad_name); |
1935 | ppad = AvARRAY(pad); | |
1936 | Perl_dump_indent(aTHX_ level, file, | |
1937 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1938 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1939 | ); | |
1940 | ||
1941 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1942 | const SV *namesv = pname[ix]; |
325e1816 | 1943 | if (namesv && !PadnameLEN(namesv)) { |
a0714e2c | 1944 | namesv = NULL; |
dd2155a4 DM |
1945 | } |
1946 | if (namesv) { | |
ee6cee0c DM |
1947 | if (SvFAKE(namesv)) |
1948 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1949 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1950 | (int) ix, |
1951 | PTR2UV(ppad[ix]), | |
1952 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1953 | SvPVX_const(namesv), |
809abb02 NC |
1954 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1955 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1956 | |
ee6cee0c DM |
1957 | ); |
1958 | else | |
1959 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1960 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1961 | (int) ix, |
1962 | PTR2UV(ppad[ix]), | |
1963 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1964 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1965 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1966 | SvPVX_const(namesv) |
ee6cee0c | 1967 | ); |
dd2155a4 DM |
1968 | } |
1969 | else if (full) { | |
1970 | Perl_dump_indent(aTHX_ level+1, file, | |
1971 | "%2d. 0x%"UVxf"<%lu>\n", | |
1972 | (int) ix, | |
1973 | PTR2UV(ppad[ix]), | |
1974 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1975 | ); | |
1976 | } | |
1977 | } | |
1978 | } | |
1979 | ||
cc76b5cc | 1980 | #ifdef DEBUGGING |
dd2155a4 DM |
1981 | |
1982 | /* | |
cc76b5cc | 1983 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1984 | |
1985 | dump the contents of a CV | |
1986 | ||
1987 | =cut | |
1988 | */ | |
1989 | ||
dd2155a4 | 1990 | STATIC void |
e1ec3a88 | 1991 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1992 | { |
53c1dcc0 | 1993 | const CV * const outside = CvOUTSIDE(cv); |
b70d5558 | 1994 | PADLIST* const padlist = CvPADLIST(cv); |
dd2155a4 | 1995 | |
7918f24d NC |
1996 | PERL_ARGS_ASSERT_CV_DUMP; |
1997 | ||
dd2155a4 DM |
1998 | PerlIO_printf(Perl_debug_log, |
1999 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
2000 | title, | |
2001 | PTR2UV(cv), | |
2002 | (CvANON(cv) ? "ANON" | |
71f882da | 2003 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
2004 | : (cv == PL_main_cv) ? "MAIN" |
2005 | : CvUNIQUE(cv) ? "UNIQUE" | |
2006 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
2007 | PTR2UV(outside), | |
2008 | (!outside ? "null" | |
2009 | : CvANON(outside) ? "ANON" | |
2010 | : (outside == PL_main_cv) ? "MAIN" | |
2011 | : CvUNIQUE(outside) ? "UNIQUE" | |
2012 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
2013 | ||
2014 | PerlIO_printf(Perl_debug_log, | |
2015 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
2016 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
2017 | } | |
dd2155a4 | 2018 | |
cc76b5cc | 2019 | #endif /* DEBUGGING */ |
dd2155a4 DM |
2020 | |
2021 | /* | |
cc76b5cc | 2022 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 2023 | |
cc76b5cc Z |
2024 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
2025 | of the function: its code, pad structure, and other attributes. | |
2026 | The prototype is combined with a capture of outer lexicals to which the | |
2027 | code refers, which are taken from the currently-executing instance of | |
2028 | the immediately surrounding code. | |
dd2155a4 DM |
2029 | |
2030 | =cut | |
2031 | */ | |
2032 | ||
e10681aa FC |
2033 | static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside); |
2034 | ||
2035 | static void | |
5fab0186 | 2036 | S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside, bool newcv) |
dd2155a4 | 2037 | { |
dd2155a4 | 2038 | I32 ix; |
b70d5558 | 2039 | PADLIST* const protopadlist = CvPADLIST(proto); |
9ef8d569 | 2040 | PAD *const protopad_name = *PadlistARRAY(protopadlist); |
86d2498c | 2041 | const PAD *const protopad = PadlistARRAY(protopadlist)[1]; |
53c1dcc0 AL |
2042 | SV** const pname = AvARRAY(protopad_name); |
2043 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
2044 | const I32 fname = AvFILLp(protopad_name); |
2045 | const I32 fpad = AvFILLp(protopad); | |
b5c19bd7 | 2046 | SV** outpad; |
71f882da | 2047 | long depth; |
e07561e6 | 2048 | bool subclones = FALSE; |
7918f24d | 2049 | |
dd2155a4 DM |
2050 | assert(!CvUNIQUE(proto)); |
2051 | ||
1b5aaca6 FC |
2052 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
2053 | * reliable. The currently-running sub is always the one we need to | |
2054 | * close over. | |
8d88fe29 FC |
2055 | * For my subs, the currently-running sub may not be the one we want. |
2056 | * We have to check whether it is a clone of CvOUTSIDE. | |
1b5aaca6 FC |
2057 | * Note that in general for formats, CvOUTSIDE != find_runcv. |
2058 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 2059 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 2060 | */ |
71f882da | 2061 | |
e07561e6 | 2062 | if (!outside) { |
ebfebee4 | 2063 | if (CvWEAKOUTSIDE(proto)) |
71f882da | 2064 | outside = find_runcv(NULL); |
e07561e6 | 2065 | else { |
af41786f | 2066 | outside = CvOUTSIDE(proto); |
db4cf31d FC |
2067 | if ((CvCLONE(outside) && ! CvCLONED(outside)) |
2068 | || !CvPADLIST(outside) | |
8771da69 FC |
2069 | || PadlistNAMES(CvPADLIST(outside)) |
2070 | != protopadlist->xpadl_outid) { | |
db4cf31d | 2071 | outside = find_runcv_where( |
a56015b9 | 2072 | FIND_RUNCV_padid_eq, PTR2IV(protopadlist->xpadl_outid), NULL |
70794f7b | 2073 | ); |
db4cf31d | 2074 | /* outside could be null */ |
5dff782d | 2075 | } |
e07561e6 | 2076 | } |
5dff782d | 2077 | } |
db4cf31d | 2078 | depth = outside ? CvDEPTH(outside) : 0; |
71f882da DM |
2079 | if (!depth) |
2080 | depth = 1; | |
b5c19bd7 | 2081 | |
dd2155a4 DM |
2082 | ENTER; |
2083 | SAVESPTR(PL_compcv); | |
e07561e6 | 2084 | PL_compcv = cv; |
5fab0186 | 2085 | if (newcv) SAVEFREESV(cv); /* in case of fatal warnings */ |
dd2155a4 | 2086 | |
a0d2bbd5 FC |
2087 | if (CvHASEVAL(cv)) |
2088 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
dd2155a4 | 2089 | |
cbacc9aa | 2090 | SAVESPTR(PL_comppad_name); |
9ef8d569 | 2091 | PL_comppad_name = protopad_name; |
eacbb379 | 2092 | CvPADLIST_set(cv, pad_new(padnew_CLONE|padnew_SAVE)); |
dd2155a4 | 2093 | |
b5c19bd7 | 2094 | av_fill(PL_comppad, fpad); |
dd2155a4 | 2095 | |
dd2155a4 DM |
2096 | PL_curpad = AvARRAY(PL_comppad); |
2097 | ||
db4cf31d | 2098 | outpad = outside && CvPADLIST(outside) |
86d2498c | 2099 | ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth]) |
f2ead8b8 | 2100 | : NULL; |
8771da69 FC |
2101 | if (outpad) |
2102 | CvPADLIST(cv)->xpadl_outid = PadlistNAMES(CvPADLIST(outside)); | |
b5c19bd7 | 2103 | |
dd2155a4 | 2104 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
2105 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
2106 | SV *sv = NULL; | |
325e1816 | 2107 | if (namesv && PadnameLEN(namesv)) { /* lexical */ |
f2047bf1 FC |
2108 | if (PadnameIsOUR(namesv)) { /* or maybe not so lexical */ |
2109 | NOOP; | |
2110 | } | |
2111 | else { | |
b5c19bd7 | 2112 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
5aec98df FC |
2113 | /* formats may have an inactive, or even undefined, parent; |
2114 | but state vars are always available. */ | |
f2ead8b8 | 2115 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe | 2116 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
db4cf31d | 2117 | && (!outside || !CvDEPTH(outside))) ) { |
445f13ff | 2118 | S_unavailable(aTHX_ namesv); |
a0714e2c | 2119 | sv = NULL; |
71f882da | 2120 | } |
33894c1a | 2121 | else |
f84c484e | 2122 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2123 | } |
71f882da | 2124 | if (!sv) { |
b15aece3 | 2125 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 2126 | if (sigil == '&') |
e07561e6 FC |
2127 | /* If there are state subs, we need to clone them, too. |
2128 | But they may need to close over variables we have | |
2129 | not cloned yet. So we will have to do a second | |
2130 | pass. Furthermore, there may be state subs clos- | |
2131 | ing over other state subs’ entries, so we have | |
2132 | to put a stub here and then clone into it on the | |
2133 | second pass. */ | |
6d5c2147 FC |
2134 | if (SvPAD_STATE(namesv) && !CvCLONED(ppad[ix])) { |
2135 | assert(SvTYPE(ppad[ix]) == SVt_PVCV); | |
2136 | subclones = 1; | |
2137 | sv = newSV_type(SVt_PVCV); | |
f3feca7a | 2138 | CvLEXICAL_on(sv); |
6d5c2147 FC |
2139 | } |
2140 | else if (PadnameLEN(namesv)>1 && !PadnameIsOUR(namesv)) | |
2141 | { | |
2142 | /* my sub */ | |
81df9f6f FC |
2143 | /* Just provide a stub, but name it. It will be |
2144 | upgrade to the real thing on scope entry. */ | |
f7cf2d13 | 2145 | dVAR; |
e1588866 FC |
2146 | U32 hash; |
2147 | PERL_HASH(hash, SvPVX_const(namesv)+1, | |
2148 | SvCUR(namesv) - 1); | |
81df9f6f | 2149 | sv = newSV_type(SVt_PVCV); |
cf748c3c FC |
2150 | CvNAME_HEK_set( |
2151 | sv, | |
2152 | share_hek(SvPVX_const(namesv)+1, | |
2153 | SvCUR(namesv) - 1 | |
2154 | * (SvUTF8(namesv) ? -1 : 1), | |
e1588866 | 2155 | hash) |
cf748c3c | 2156 | ); |
f3feca7a | 2157 | CvLEXICAL_on(sv); |
6d5c2147 FC |
2158 | } |
2159 | else sv = SvREFCNT_inc(ppad[ix]); | |
e1ec3a88 | 2160 | else if (sigil == '@') |
ad64d0ec | 2161 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2162 | else if (sigil == '%') |
ad64d0ec | 2163 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2164 | else |
561b68a9 | 2165 | sv = newSV(0); |
0d3b281c | 2166 | /* reset the 'assign only once' flag on each state var */ |
e07561e6 | 2167 | if (sigil != '&' && SvPAD_STATE(namesv)) |
0d3b281c | 2168 | SvPADSTALE_on(sv); |
dd2155a4 | 2169 | } |
f2047bf1 | 2170 | } |
dd2155a4 | 2171 | } |
4c894bf7 | 2172 | else if (namesv && PadnamePV(namesv)) { |
f84c484e | 2173 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2174 | } |
2175 | else { | |
561b68a9 | 2176 | sv = newSV(0); |
dd2155a4 | 2177 | SvPADTMP_on(sv); |
dd2155a4 | 2178 | } |
71f882da | 2179 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2180 | } |
2181 | ||
e07561e6 FC |
2182 | if (subclones) |
2183 | for (ix = fpad; ix > 0; ix--) { | |
2184 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; | |
2185 | if (namesv && namesv != &PL_sv_undef && !SvFAKE(namesv) | |
2186 | && SvPVX_const(namesv)[0] == '&' && SvPAD_STATE(namesv)) | |
2187 | S_cv_clone(aTHX_ (CV *)ppad[ix], (CV *)PL_curpad[ix], cv); | |
2188 | } | |
2189 | ||
5fab0186 | 2190 | if (newcv) SvREFCNT_inc_simple_void_NN(cv); |
e10681aa FC |
2191 | LEAVE; |
2192 | } | |
2193 | ||
2194 | static CV * | |
2195 | S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside) | |
2196 | { | |
20b7effb | 2197 | #ifdef USE_ITHREADS |
c04ef36e | 2198 | dVAR; |
20b7effb | 2199 | #endif |
5fab0186 | 2200 | const bool newcv = !cv; |
c04ef36e | 2201 | |
e10681aa FC |
2202 | assert(!CvUNIQUE(proto)); |
2203 | ||
2204 | if (!cv) cv = MUTABLE_CV(newSV_type(SvTYPE(proto))); | |
2205 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC | |
2206 | |CVf_SLABBED); | |
2207 | CvCLONED_on(cv); | |
2208 | ||
2209 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) | |
2210 | : CvFILE(proto); | |
2211 | if (CvNAMED(proto)) | |
2e800d79 | 2212 | CvNAME_HEK_set(cv, share_hek_hek(CvNAME_HEK(proto))); |
e10681aa FC |
2213 | else CvGV_set(cv,CvGV(proto)); |
2214 | CvSTASH_set(cv, CvSTASH(proto)); | |
2215 | OP_REFCNT_LOCK; | |
2216 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
2217 | OP_REFCNT_UNLOCK; | |
2218 | CvSTART(cv) = CvSTART(proto); | |
2219 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
2220 | ||
fdf416b6 | 2221 | if (SvPOK(proto)) { |
e10681aa | 2222 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
fdf416b6 BF |
2223 | if (SvUTF8(proto)) |
2224 | SvUTF8_on(MUTABLE_SV(cv)); | |
2225 | } | |
e10681aa FC |
2226 | if (SvMAGIC(proto)) |
2227 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
2228 | ||
5fab0186 | 2229 | if (CvPADLIST(proto)) S_cv_clone_pad(aTHX_ proto, cv, outside, newcv); |
e10681aa | 2230 | |
dd2155a4 DM |
2231 | DEBUG_Xv( |
2232 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
e10681aa | 2233 | if (CvOUTSIDE(cv)) cv_dump(CvOUTSIDE(cv), "Outside"); |
dd2155a4 DM |
2234 | cv_dump(proto, "Proto"); |
2235 | cv_dump(cv, "To"); | |
2236 | ); | |
2237 | ||
d3f8a934 AB |
2238 | if (CvCONST(cv)) { |
2239 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: | |
2240 | * The prototype was marked as a candiate for const-ization, | |
2241 | * so try to grab the current const value, and if successful, | |
2242 | * turn into a const sub: | |
2243 | */ | |
2244 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); | |
2245 | if (const_sv) { | |
2246 | SvREFCNT_dec_NN(cv); | |
2247 | /* For this calling case, op_const_sv returns a *copy*, which we | |
2248 | donate to newCONSTSUB. Yes, this is ugly, and should be killed. | |
2249 | Need to fix how lib/constant.pm works to eliminate this. */ | |
2250 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); | |
2251 | } | |
2252 | else { | |
2253 | CvCONST_off(cv); | |
2254 | } | |
2255 | } | |
2256 | ||
dd2155a4 DM |
2257 | return cv; |
2258 | } | |
2259 | ||
e07561e6 FC |
2260 | CV * |
2261 | Perl_cv_clone(pTHX_ CV *proto) | |
2262 | { | |
2263 | PERL_ARGS_ASSERT_CV_CLONE; | |
2264 | ||
fead5351 | 2265 | if (!CvPADLIST(proto)) Perl_croak(aTHX_ "panic: no pad in cv_clone"); |
e07561e6 FC |
2266 | return S_cv_clone(aTHX_ proto, NULL, NULL); |
2267 | } | |
2268 | ||
6d5c2147 FC |
2269 | /* Called only by pp_clonecv */ |
2270 | CV * | |
2271 | Perl_cv_clone_into(pTHX_ CV *proto, CV *target) | |
2272 | { | |
2273 | PERL_ARGS_ASSERT_CV_CLONE_INTO; | |
2274 | cv_undef(target); | |
2275 | return S_cv_clone(aTHX_ proto, target, NULL); | |
2276 | } | |
2277 | ||
fb094047 FC |
2278 | /* |
2279 | =for apidoc cv_name | |
2280 | ||
2281 | Returns an SV containing the name of the CV, mainly for use in error | |
2282 | reporting. The CV may actually be a GV instead, in which case the returned | |
7a275a2e FC |
2283 | SV holds the GV's name. Anything other than a GV or CV is treated as a |
2284 | string already holding the sub name, but this could change in the future. | |
fb094047 FC |
2285 | |
2286 | An SV may be passed as a second argument. If so, the name will be assigned | |
2287 | to it and it will be returned. Otherwise the returned SV will be a new | |
2288 | mortal. | |
2289 | ||
ecf05a58 FC |
2290 | If the I<flags> include CV_NAME_NOTQUAL, then the package name will not be |
2291 | included. If the first argument is neither a CV nor a GV, this flag is | |
2292 | ignored (subject to change). | |
2293 | ||
fb094047 FC |
2294 | =cut |
2295 | */ | |
2296 | ||
c5569a55 | 2297 | SV * |
ecf05a58 | 2298 | Perl_cv_name(pTHX_ CV *cv, SV *sv, U32 flags) |
c5569a55 FC |
2299 | { |
2300 | PERL_ARGS_ASSERT_CV_NAME; | |
2301 | if (!isGV_with_GP(cv) && SvTYPE(cv) != SVt_PVCV) { | |
2302 | if (sv) sv_setsv(sv,(SV *)cv); | |
2303 | return sv ? (sv) : (SV *)cv; | |
2304 | } | |
2305 | { | |
f3fb6cf3 | 2306 | SV * const retsv = sv ? (sv) : sv_newmortal(); |
c5569a55 FC |
2307 | if (SvTYPE(cv) == SVt_PVCV) { |
2308 | if (CvNAMED(cv)) { | |
ecf05a58 FC |
2309 | if (CvLEXICAL(cv) || flags & CV_NAME_NOTQUAL) |
2310 | sv_sethek(retsv, CvNAME_HEK(cv)); | |
c5569a55 FC |
2311 | else { |
2312 | sv_sethek(retsv, HvNAME_HEK(CvSTASH(cv))); | |
2313 | sv_catpvs(retsv, "::"); | |
f34d8cdd | 2314 | sv_cathek(retsv, CvNAME_HEK(cv)); |
c5569a55 FC |
2315 | } |
2316 | } | |
ecf05a58 | 2317 | else if (CvLEXICAL(cv) || flags & CV_NAME_NOTQUAL) |
c5569a55 FC |
2318 | sv_sethek(retsv, GvNAME_HEK(GvEGV(CvGV(cv)))); |
2319 | else gv_efullname3(retsv, CvGV(cv), NULL); | |
2320 | } | |
ecf05a58 | 2321 | else if (flags & CV_NAME_NOTQUAL) sv_sethek(retsv, GvNAME_HEK(cv)); |
c5569a55 FC |
2322 | else gv_efullname3(retsv,(GV *)cv,NULL); |
2323 | return retsv; | |
2324 | } | |
2325 | } | |
2326 | ||
dd2155a4 | 2327 | /* |
cc76b5cc | 2328 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2329 | |
2330 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
72d33970 | 2331 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
7dafbf52 | 2332 | moved to a pre-existing CV struct. |
dd2155a4 DM |
2333 | |
2334 | =cut | |
2335 | */ | |
2336 | ||
2337 | void | |
2338 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2339 | { | |
2340 | I32 ix; | |
86d2498c FC |
2341 | AV * const comppad_name = PadlistARRAY(padlist)[0]; |
2342 | AV * const comppad = PadlistARRAY(padlist)[1]; | |
53c1dcc0 AL |
2343 | SV ** const namepad = AvARRAY(comppad_name); |
2344 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2345 | |
2346 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2347 | PERL_UNUSED_ARG(old_cv); |
2348 | ||
dd2155a4 | 2349 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2350 | const SV * const namesv = namepad[ix]; |
09a30bc4 | 2351 | if (namesv && namesv != &PL_sv_undef && !SvPAD_STATE(namesv) |
b15aece3 | 2352 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2353 | { |
e09ac076 | 2354 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
0afba48f FC |
2355 | MAGIC * const mg = |
2356 | SvMAGICAL(curpad[ix]) | |
2357 | ? mg_find(curpad[ix], PERL_MAGIC_proto) | |
2358 | : NULL; | |
2359 | CV * const innercv = MUTABLE_CV(mg ? mg->mg_obj : curpad[ix]); | |
2360 | if (CvOUTSIDE(innercv) == old_cv) { | |
1f122f9b FC |
2361 | if (!CvWEAKOUTSIDE(innercv)) { |
2362 | SvREFCNT_dec(old_cv); | |
2363 | SvREFCNT_inc_simple_void_NN(new_cv); | |
2364 | } | |
0afba48f FC |
2365 | CvOUTSIDE(innercv) = new_cv; |
2366 | } | |
e09ac076 FC |
2367 | } |
2368 | else { /* format reference */ | |
2369 | SV * const rv = curpad[ix]; | |
2370 | CV *innercv; | |
2371 | if (!SvOK(rv)) continue; | |
2372 | assert(SvROK(rv)); | |
2373 | assert(SvWEAKREF(rv)); | |
2374 | innercv = (CV *)SvRV(rv); | |
2375 | assert(!CvWEAKOUTSIDE(innercv)); | |
2376 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2377 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2378 | } | |
dd2155a4 DM |
2379 | } |
2380 | } | |
2381 | } | |
2382 | ||
2383 | /* | |
cc76b5cc | 2384 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2385 | |
2386 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2387 | this depth, in which case don't bother creating a new one. Then give |
2388 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2389 | |
2390 | =cut | |
2391 | */ | |
2392 | ||
2393 | void | |
26019298 | 2394 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2395 | { |
7918f24d NC |
2396 | PERL_ARGS_ASSERT_PAD_PUSH; |
2397 | ||
86d2498c FC |
2398 | if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) { |
2399 | PAD** const svp = PadlistARRAY(padlist); | |
44f8325f AL |
2400 | AV* const newpad = newAV(); |
2401 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2402 | I32 ix = AvFILLp((const AV *)svp[1]); |
2403 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2404 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2405 | AV *av; |
2406 | ||
dd2155a4 | 2407 | for ( ;ix > 0; ix--) { |
325e1816 | 2408 | if (names_fill >= ix && PadnameLEN(names[ix])) { |
b15aece3 | 2409 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2410 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2411 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2412 | || sigil == '&') | |
2413 | { | |
dd2155a4 DM |
2414 | /* outer lexical or anon code */ |
2415 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2416 | } | |
2417 | else { /* our own lexical */ | |
26019298 AL |
2418 | SV *sv; |
2419 | if (sigil == '@') | |
ad64d0ec | 2420 | sv = MUTABLE_SV(newAV()); |
26019298 | 2421 | else if (sigil == '%') |
ad64d0ec | 2422 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2423 | else |
561b68a9 | 2424 | sv = newSV(0); |
26019298 | 2425 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2426 | } |
2427 | } | |
778f1807 | 2428 | else if (PadnamePV(names[ix])) { |
f84c484e | 2429 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2430 | } |
2431 | else { | |
2432 | /* save temporaries on recursion? */ | |
561b68a9 | 2433 | SV * const sv = newSV(0); |
26019298 | 2434 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2435 | SvPADTMP_on(sv); |
2436 | } | |
2437 | } | |
26019298 | 2438 | av = newAV(); |
ad64d0ec | 2439 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2440 | AvREIFY_only(av); |
26019298 | 2441 | |
7261499d | 2442 | padlist_store(padlist, depth, newpad); |
dd2155a4 DM |
2443 | } |
2444 | } | |
b21dc031 | 2445 | |
cc76b5cc Z |
2446 | /* |
2447 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2448 | ||
2449 | Looks up the type of the lexical variable at position I<po> in the | |
2450 | currently-compiling pad. If the variable is typed, the stash of the | |
2451 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2452 | ||
2453 | =cut | |
2454 | */ | |
b21dc031 AL |
2455 | |
2456 | HV * | |
2457 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2458 | { | |
3769e90d DD |
2459 | SV* const av = PAD_COMPNAME_SV(po); |
2460 | if ( SvPAD_TYPED(av) ) { | |
2461 | return SvSTASH(av); | |
b21dc031 | 2462 | } |
5c284bb0 | 2463 | return NULL; |
b21dc031 | 2464 | } |
66610fdd | 2465 | |
d5b1589c NC |
2466 | #if defined(USE_ITHREADS) |
2467 | ||
2468 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2469 | ||
cc76b5cc | 2470 | /* |
b70d5558 | 2471 | =for apidoc padlist_dup |
cc76b5cc Z |
2472 | |
2473 | Duplicates a pad. | |
2474 | ||
2475 | =cut | |
2476 | */ | |
2477 | ||
b70d5558 FC |
2478 | PADLIST * |
2479 | Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param) | |
d5b1589c | 2480 | { |
7261499d FC |
2481 | PADLIST *dstpad; |
2482 | bool cloneall; | |
2483 | PADOFFSET max; | |
2484 | ||
d5b1589c NC |
2485 | PERL_ARGS_ASSERT_PADLIST_DUP; |
2486 | ||
7261499d | 2487 | cloneall = param->flags & CLONEf_COPY_STACKS |
86d2498c FC |
2488 | || SvREFCNT(PadlistARRAY(srcpad)[1]) > 1; |
2489 | assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1); | |
7261499d | 2490 | |
86d2498c | 2491 | max = cloneall ? PadlistMAX(srcpad) : 1; |
7261499d FC |
2492 | |
2493 | Newx(dstpad, 1, PADLIST); | |
2494 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
86d2498c FC |
2495 | PadlistMAX(dstpad) = max; |
2496 | Newx(PadlistARRAY(dstpad), max + 1, PAD *); | |
7261499d FC |
2497 | |
2498 | if (cloneall) { | |
2499 | PADOFFSET depth; | |
2500 | for (depth = 0; depth <= max; ++depth) | |
86d2498c FC |
2501 | PadlistARRAY(dstpad)[depth] = |
2502 | av_dup_inc(PadlistARRAY(srcpad)[depth], param); | |
6de654a5 NC |
2503 | } else { |
2504 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2505 | to build anything other than the first level of pads. */ | |
86d2498c | 2506 | I32 ix = AvFILLp(PadlistARRAY(srcpad)[1]); |
6de654a5 | 2507 | AV *pad1; |
86d2498c FC |
2508 | const I32 names_fill = AvFILLp(PadlistARRAY(srcpad)[0]); |
2509 | const PAD *const srcpad1 = PadlistARRAY(srcpad)[1]; | |
6de654a5 NC |
2510 | SV **oldpad = AvARRAY(srcpad1); |
2511 | SV **names; | |
2512 | SV **pad1a; | |
2513 | AV *args; | |
6de654a5 | 2514 | |
86d2498c FC |
2515 | PadlistARRAY(dstpad)[0] = |
2516 | av_dup_inc(PadlistARRAY(srcpad)[0], param); | |
2517 | names = AvARRAY(PadlistARRAY(dstpad)[0]); | |
6de654a5 NC |
2518 | |
2519 | pad1 = newAV(); | |
2520 | ||
2521 | av_extend(pad1, ix); | |
86d2498c | 2522 | PadlistARRAY(dstpad)[1] = pad1; |
6de654a5 | 2523 | pad1a = AvARRAY(pad1); |
6de654a5 NC |
2524 | |
2525 | if (ix > -1) { | |
2526 | AvFILLp(pad1) = ix; | |
2527 | ||
2528 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2529 | if (!oldpad[ix]) { |
2530 | pad1a[ix] = NULL; | |
ce0d59fd FC |
2531 | } else if (names_fill >= ix && names[ix] && |
2532 | PadnameLEN(names[ix])) { | |
05d04d9c NC |
2533 | const char sigil = SvPVX_const(names[ix])[0]; |
2534 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2535 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2536 | || sigil == '&') | |
2537 | { | |
2538 | /* outer lexical or anon code */ | |
2539 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2540 | } | |
2541 | else { /* our own lexical */ | |
adf8f095 NC |
2542 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2543 | /* This is a work around for how the current | |
2544 | implementation of ?{ } blocks in regexps | |
2545 | interacts with lexicals. */ | |
05d04d9c NC |
2546 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2547 | } else { | |
2548 | SV *sv; | |
2549 | ||
2550 | if (sigil == '@') | |
2551 | sv = MUTABLE_SV(newAV()); | |
2552 | else if (sigil == '%') | |
2553 | sv = MUTABLE_SV(newHV()); | |
2554 | else | |
2555 | sv = newSV(0); | |
2556 | pad1a[ix] = sv; | |
05d04d9c NC |
2557 | } |
2558 | } | |
2559 | } | |
92154801 | 2560 | else if (( names_fill >= ix && names[ix] |
ce0d59fd | 2561 | && PadnamePV(names[ix]) )) { |
05d04d9c NC |
2562 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2563 | } | |
2564 | else { | |
2565 | /* save temporaries on recursion? */ | |
2566 | SV * const sv = newSV(0); | |
2567 | pad1a[ix] = sv; | |
2568 | ||
2569 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2570 | FIXTHAT before merging this branch. | |
2571 | (And I know how to) */ | |
145bf8ee | 2572 | if (SvPADTMP(oldpad[ix])) |
05d04d9c NC |
2573 | SvPADTMP_on(sv); |
2574 | } | |
6de654a5 NC |
2575 | } |
2576 | ||
2577 | if (oldpad[0]) { | |
2578 | args = newAV(); /* Will be @_ */ | |
2579 | AvREIFY_only(args); | |
2580 | pad1a[0] = (SV *)args; | |
2581 | } | |
2582 | } | |
2583 | } | |
d5b1589c NC |
2584 | |
2585 | return dstpad; | |
2586 | } | |
2587 | ||
cc76b5cc | 2588 | #endif /* USE_ITHREADS */ |
d5b1589c | 2589 | |
7261499d | 2590 | PAD ** |
5aaab254 | 2591 | Perl_padlist_store(pTHX_ PADLIST *padlist, I32 key, PAD *val) |
7261499d | 2592 | { |
7261499d | 2593 | PAD **ary; |
86d2498c | 2594 | SSize_t const oldmax = PadlistMAX(padlist); |
7261499d FC |
2595 | |
2596 | PERL_ARGS_ASSERT_PADLIST_STORE; | |
2597 | ||
2598 | assert(key >= 0); | |
2599 | ||
86d2498c FC |
2600 | if (key > PadlistMAX(padlist)) { |
2601 | av_extend_guts(NULL,key,&PadlistMAX(padlist), | |
2602 | (SV ***)&PadlistARRAY(padlist), | |
2603 | (SV ***)&PadlistARRAY(padlist)); | |
2604 | Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax, | |
7261499d FC |
2605 | PAD *); |
2606 | } | |
86d2498c | 2607 | ary = PadlistARRAY(padlist); |
7261499d FC |
2608 | SvREFCNT_dec(ary[key]); |
2609 | ary[key] = val; | |
2610 | return &ary[key]; | |
2611 | } | |
2612 | ||
66610fdd RGS |
2613 | /* |
2614 | * Local variables: | |
2615 | * c-indentation-style: bsd | |
2616 | * c-basic-offset: 4 | |
14d04a33 | 2617 | * indent-tabs-mode: nil |
66610fdd RGS |
2618 | * End: |
2619 | * | |
14d04a33 | 2620 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2621 | */ |