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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 | ||
dd2155a4 DM |
21 | /* |
22 | =head1 Pad Data Structures | |
23 | ||
cc76b5cc | 24 | =for apidoc Amx|PADLIST *|CvPADLIST|CV *cv |
166f8a29 | 25 | |
58a9b2fe | 26 | CV's can have CvPADLIST(cv) set to point to a PADLIST. This is the CV's |
cc76b5cc Z |
27 | scratchpad, which stores lexical variables and opcode temporary and |
28 | per-thread values. | |
dd2155a4 | 29 | |
58a9b2fe | 30 | For these purposes "formats" are a kind-of CV; eval""s are too (except they're |
dd2155a4 | 31 | not callable at will and are always thrown away after the eval"" is done |
58a9b2fe | 32 | executing). Require'd files are simply evals without any outer lexical |
b5c19bd7 | 33 | scope. |
dd2155a4 | 34 | |
796b6530 | 35 | XSUBs do not have a C<CvPADLIST>. C<dXSTARG> fetches values from C<PL_curpad>, |
dd2155a4 | 36 | but that is really the callers pad (a slot of which is allocated by |
796b6530 KW |
37 | every entersub). Do not get or set C<CvPADLIST> if a CV is an XSUB (as |
38 | determined by C<CvISXSUB()>), C<CvPADLIST> slot is reused for a different | |
eacbb379 | 39 | internal purpose in XSUBs. |
dd2155a4 | 40 | |
58a9b2fe | 41 | The PADLIST has a C array where pads are stored. |
dd2155a4 | 42 | |
9b7476d7 FC |
43 | The 0th entry of the PADLIST is a PADNAMELIST |
44 | which represents the "names" or rather | |
58a9b2fe | 45 | the "static type information" for lexicals. The individual elements of a |
9b7476d7 | 46 | PADNAMELIST are PADNAMEs. Future |
7a5eb04d | 47 | refactorings might stop the PADNAMELIST from being stored in the PADLIST's |
86d2498c | 48 | array, so don't rely on it. See L</PadlistNAMES>. |
dd2155a4 | 49 | |
58a9b2fe FC |
50 | The CvDEPTH'th entry of a PADLIST is a PAD (an AV) which is the stack frame |
51 | at that depth of recursion into the CV. The 0th slot of a frame AV is an | |
796b6530 | 52 | AV which is C<@_>. Other entries are storage for variables and op targets. |
dd2155a4 | 53 | |
58a9b2fe | 54 | Iterating over the PADNAMELIST iterates over all possible pad |
796b6530 | 55 | items. Pad slots for targets (C<SVs_PADTMP>) |
307a54be | 56 | and GVs end up having &PL_padname_undef "names", while slots for constants |
796b6530 KW |
57 | have C<&PL_padname_const> "names" (see C<L</pad_alloc>>). That |
58 | C<&PL_padname_undef> | |
59 | and C<&PL_padname_const> are used is an implementation detail subject to | |
60 | change. To test for them, use C<!PadnamePV(name)> and | |
61b16eb9 | 61 | S<C<PadnamePV(name) && !PadnameLEN(name)>>, respectively. |
dd2155a4 | 62 | |
796b6530 | 63 | Only C<my>/C<our> variable slots get valid names. |
dd2155a4 DM |
64 | The rest are op targets/GVs/constants which are statically allocated |
65 | or resolved at compile time. These don't have names by which they | |
58a9b2fe | 66 | can be looked up from Perl code at run time through eval"" the way |
796b6530 | 67 | C<my>/C<our> variables can be. Since they can't be looked up by "name" |
dd2155a4 | 68 | but only by their index allocated at compile time (which is usually |
fefd4795 | 69 | in C<< PL_op->op_targ >>), wasting a name SV for them doesn't make sense. |
dd2155a4 | 70 | |
307a54be | 71 | The pad names in the PADNAMELIST have their PV holding the name of |
796b6530 | 72 | the variable. The C<COP_SEQ_RANGE_LOW> and C<_HIGH> fields form a range |
307a54be FC |
73 | (low+1..high inclusive) of cop_seq numbers for which the name is |
74 | valid. During compilation, these fields may hold the special value | |
61f4bfbf | 75 | PERL_PADSEQ_INTRO to indicate various stages: |
0d311cdb | 76 | |
8560fbdd KW |
77 | COP_SEQ_RANGE_LOW _HIGH |
78 | ----------------- ----- | |
79 | PERL_PADSEQ_INTRO 0 variable not yet introduced: | |
80 | { my ($x | |
81 | valid-seq# PERL_PADSEQ_INTRO variable in scope: | |
4e785f27 | 82 | { my ($x); |
8560fbdd | 83 | valid-seq# valid-seq# compilation of scope complete: |
4e785f27 DM |
84 | { my ($x); .... } |
85 | ||
86 | When a lexical var hasn't yet been introduced, it already exists from the | |
87 | perspective of duplicate declarations, but not for variable lookups, e.g. | |
88 | ||
89 | my ($x, $x); # '"my" variable $x masks earlier declaration' | |
90 | my $x = $x; # equal to my $x = $::x; | |
0d311cdb | 91 | |
796b6530 KW |
92 | For typed lexicals C<PadnameTYPE> points at the type stash. For C<our> |
93 | lexicals, C<PadnameOURSTASH> points at the stash of the associated global (so | |
307a54be | 94 | that duplicate C<our> declarations in the same package can be detected). |
796b6530 | 95 | C<PadnameGEN> is sometimes used to store the generation number during |
307a54be FC |
96 | compilation. |
97 | ||
796b6530 | 98 | If C<PadnameOUTER> is set on the pad name, then that slot in the frame AV |
307a54be FC |
99 | is a REFCNT'ed reference to a lexical from "outside". Such entries |
100 | are sometimes referred to as 'fake'. In this case, the name does not | |
101 | use 'low' and 'high' to store a cop_seq range, since it is in scope | |
102 | throughout. Instead 'high' stores some flags containing info about | |
b5c19bd7 | 103 | the real lexical (is it declared in an anon, and is it capable of being |
307a54be | 104 | instantiated multiple times?), and for fake ANONs, 'low' contains the index |
b5c19bd7 DM |
105 | within the parent's pad where the lexical's value is stored, to make |
106 | cloning quicker. | |
dd2155a4 | 107 | |
796b6530 | 108 | If the 'name' is C<&> the corresponding entry in the PAD |
dd2155a4 | 109 | is a CV representing a possible closure. |
dd2155a4 | 110 | |
71f882da DM |
111 | Note that formats are treated as anon subs, and are cloned each time |
112 | write is called (if necessary). | |
113 | ||
796b6530 | 114 | The flag C<SVs_PADSTALE> is cleared on lexicals each time the C<my()> is executed, |
58a9b2fe | 115 | and set on scope exit. This allows the |
796b6530 | 116 | C<"Variable $x is not available"> warning |
e6e7068b DM |
117 | to be generated in evals, such as |
118 | ||
119 | { my $x = 1; sub f { eval '$x'} } f(); | |
120 | ||
796b6530 | 121 | For state vars, C<SVs_PADSTALE> is overloaded to mean 'not yet initialised', |
c9956dca | 122 | but this internal state is stored in a separate pad entry. |
d1186544 | 123 | |
36c300bb | 124 | =for apidoc AmxU|PADNAMELIST *|PL_comppad_name |
cc76b5cc Z |
125 | |
126 | During compilation, this points to the array containing the names part | |
127 | of the pad for the currently-compiling code. | |
128 | ||
36c300bb | 129 | =for apidoc AmxU|PAD *|PL_comppad |
cc76b5cc Z |
130 | |
131 | During compilation, this points to the array containing the values | |
132 | part of the pad for the currently-compiling code. (At runtime a CV may | |
133 | have many such value arrays; at compile time just one is constructed.) | |
134 | At runtime, this points to the array containing the currently-relevant | |
135 | values for the pad for the currently-executing code. | |
136 | ||
137 | =for apidoc AmxU|SV **|PL_curpad | |
138 | ||
139 | Points directly to the body of the L</PL_comppad> array. | |
efa4252e | 140 | (I.e., this is C<PadARRAY(PL_comppad)>.) |
cc76b5cc | 141 | |
dd2155a4 DM |
142 | =cut |
143 | */ | |
144 | ||
145 | ||
146 | #include "EXTERN.h" | |
147 | #define PERL_IN_PAD_C | |
148 | #include "perl.h" | |
952306ac | 149 | #include "keywords.h" |
dd2155a4 | 150 | |
3441fb63 | 151 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
0f94cb1f | 152 | STMT_START { (sv)->xpadn_low = (val); } STMT_END |
3441fb63 | 153 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ |
0f94cb1f | 154 | STMT_START { (sv)->xpadn_high = (val); } STMT_END |
809abb02 | 155 | |
0f94cb1f FC |
156 | #define PARENT_PAD_INDEX_set COP_SEQ_RANGE_LOW_set |
157 | #define PARENT_FAKELEX_FLAGS_set COP_SEQ_RANGE_HIGH_set | |
dd2155a4 | 158 | |
eacbb379 DD |
159 | #ifdef DEBUGGING |
160 | void | |
e69651e7 | 161 | Perl_set_padlist(CV * cv, PADLIST *padlist){ |
eacbb379 DD |
162 | PERL_ARGS_ASSERT_SET_PADLIST; |
163 | # if PTRSIZE == 8 | |
e5964223 | 164 | assert((Size_t)padlist != UINT64_C(0xEFEFEFEFEFEFEFEF)); |
eacbb379 | 165 | # elif PTRSIZE == 4 |
a1c99363 | 166 | assert((Size_t)padlist != 0xEFEFEFEF); |
eacbb379 DD |
167 | # else |
168 | # error unknown pointer size | |
169 | # endif | |
e5964223 | 170 | assert(!CvISXSUB(cv)); |
eacbb379 DD |
171 | ((XPVCV*)MUTABLE_PTR(SvANY(cv)))->xcv_padlist_u.xcv_padlist = padlist; |
172 | } | |
173 | #endif | |
5b16296c BF |
174 | |
175 | /* | |
cc76b5cc | 176 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 177 | |
cc76b5cc Z |
178 | Create a new padlist, updating the global variables for the |
179 | currently-compiling padlist to point to the new padlist. The following | |
180 | flags can be OR'ed together: | |
dd2155a4 DM |
181 | |
182 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 183 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
184 | padnew_SAVESUB also save extra stuff for start of sub |
185 | ||
186 | =cut | |
187 | */ | |
188 | ||
189 | PADLIST * | |
c7c737cb | 190 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 191 | { |
7261499d | 192 | PADLIST *padlist; |
9b7476d7 FC |
193 | PADNAMELIST *padname; |
194 | PAD *pad; | |
7261499d | 195 | PAD **ary; |
dd2155a4 | 196 | |
f3548bdc DM |
197 | ASSERT_CURPAD_LEGAL("pad_new"); |
198 | ||
dd2155a4 DM |
199 | /* save existing state, ... */ |
200 | ||
201 | if (flags & padnew_SAVE) { | |
3979c56f | 202 | SAVECOMPPAD(); |
dd2155a4 | 203 | if (! (flags & padnew_CLONE)) { |
cbacc9aa | 204 | SAVESPTR(PL_comppad_name); |
d12be05d DM |
205 | save_strlen((STRLEN *)&PL_padix); |
206 | save_strlen((STRLEN *)&PL_constpadix); | |
207 | save_strlen((STRLEN *)&PL_comppad_name_fill); | |
208 | save_strlen((STRLEN *)&PL_min_intro_pending); | |
209 | save_strlen((STRLEN *)&PL_max_intro_pending); | |
8bbe96d7 | 210 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 211 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 212 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
213 | } |
214 | } | |
215 | } | |
dd2155a4 DM |
216 | |
217 | /* ... create new pad ... */ | |
218 | ||
7261499d | 219 | Newxz(padlist, 1, PADLIST); |
dd2155a4 DM |
220 | pad = newAV(); |
221 | ||
222 | if (flags & padnew_CLONE) { | |
e1ec3a88 | 223 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 224 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 225 | AvREIFY_only(a0); |
9ef8d569 | 226 | |
9b7476d7 | 227 | PadnamelistREFCNT(padname = PL_comppad_name)++; |
dd2155a4 DM |
228 | } |
229 | else { | |
b4db5868 | 230 | padlist->xpadl_id = PL_padlist_generation++; |
a0714e2c | 231 | av_store(pad, 0, NULL); |
9b7476d7 | 232 | padname = newPADNAMELIST(0); |
0f94cb1f | 233 | padnamelist_store(padname, 0, &PL_padname_undef); |
dd2155a4 DM |
234 | } |
235 | ||
7a6072a8 NC |
236 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
237 | array - names, and depth=1. The default for av_store() is to allocate | |
238 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
239 | up, so we inline the allocation of the array here. */ | |
7261499d | 240 | Newx(ary, 2, PAD *); |
86d2498c FC |
241 | PadlistMAX(padlist) = 1; |
242 | PadlistARRAY(padlist) = ary; | |
9b7476d7 | 243 | ary[0] = (PAD *)padname; |
7261499d | 244 | ary[1] = pad; |
dd2155a4 DM |
245 | |
246 | /* ... then update state variables */ | |
247 | ||
403799bf NC |
248 | PL_comppad = pad; |
249 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
250 | |
251 | if (! (flags & padnew_CLONE)) { | |
9ef8d569 | 252 | PL_comppad_name = padname; |
dd2155a4 DM |
253 | PL_comppad_name_fill = 0; |
254 | PL_min_intro_pending = 0; | |
255 | PL_padix = 0; | |
b54c5e14 | 256 | PL_constpadix = 0; |
b5c19bd7 | 257 | PL_cv_has_eval = 0; |
dd2155a4 DM |
258 | } |
259 | ||
260 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 KW |
261 | "Pad 0x%" UVxf "[0x%" UVxf "] new: compcv=0x%" UVxf |
262 | " name=0x%" UVxf " flags=0x%" UVxf "\n", | |
b5c19bd7 | 263 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
264 | PTR2UV(padname), (UV)flags |
265 | ) | |
266 | ); | |
267 | ||
268 | return (PADLIST*)padlist; | |
269 | } | |
270 | ||
dd2155a4 | 271 | |
c4528262 NC |
272 | /* |
273 | =head1 Embedding Functions | |
274 | ||
275 | =for apidoc cv_undef | |
276 | ||
72d33970 | 277 | Clear out all the active components of a CV. This can happen either |
c4528262 | 278 | by an explicit C<undef &foo>, or by the reference count going to zero. |
796b6530 | 279 | In the former case, we keep the C<CvOUTSIDE> pointer, so that any anonymous |
c4528262 NC |
280 | children can still follow the full lexical scope chain. |
281 | ||
282 | =cut | |
283 | */ | |
284 | ||
285 | void | |
286 | Perl_cv_undef(pTHX_ CV *cv) | |
287 | { | |
b7acb0a3 FC |
288 | PERL_ARGS_ASSERT_CV_UNDEF; |
289 | cv_undef_flags(cv, 0); | |
290 | } | |
291 | ||
292 | void | |
293 | Perl_cv_undef_flags(pTHX_ CV *cv, U32 flags) | |
294 | { | |
52ec28d5 DD |
295 | CV cvbody;/*CV body will never be realloced inside this func, |
296 | so dont read it more than once, use fake CV so existing macros | |
297 | will work, the indirection and CV head struct optimized away*/ | |
298 | SvANY(&cvbody) = SvANY(cv); | |
c4528262 | 299 | |
b7acb0a3 | 300 | PERL_ARGS_ASSERT_CV_UNDEF_FLAGS; |
c4528262 NC |
301 | |
302 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 303 | "CV undef: cv=0x%" UVxf " comppad=0x%" UVxf "\n", |
c4528262 NC |
304 | PTR2UV(cv), PTR2UV(PL_comppad)) |
305 | ); | |
306 | ||
52ec28d5 DD |
307 | if (CvFILE(&cvbody)) { |
308 | char * file = CvFILE(&cvbody); | |
309 | CvFILE(&cvbody) = NULL; | |
310 | if(CvDYNFILE(&cvbody)) | |
311 | Safefree(file); | |
c4528262 | 312 | } |
dd2155a4 | 313 | |
52ec28d5 DD |
314 | /* CvSLABBED_off(&cvbody); *//* turned off below */ |
315 | /* release the sub's body */ | |
316 | if (!CvISXSUB(&cvbody)) { | |
317 | if(CvROOT(&cvbody)) { | |
318 | assert(SvTYPE(cv) == SVt_PVCV || SvTYPE(cv) == SVt_PVFM); /*unsafe is safe */ | |
319 | if (CvDEPTHunsafe(&cvbody)) { | |
320 | assert(SvTYPE(cv) == SVt_PVCV); | |
321 | Perl_croak_nocontext("Can't undef active subroutine"); | |
322 | } | |
323 | ENTER; | |
324 | ||
325 | PAD_SAVE_SETNULLPAD(); | |
326 | ||
327 | if (CvSLABBED(&cvbody)) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(&cvbody))); | |
328 | op_free(CvROOT(&cvbody)); | |
329 | CvROOT(&cvbody) = NULL; | |
330 | CvSTART(&cvbody) = NULL; | |
331 | LEAVE; | |
332 | } | |
333 | else if (CvSLABBED(&cvbody)) { | |
334 | if( CvSTART(&cvbody)) { | |
335 | ENTER; | |
336 | PAD_SAVE_SETNULLPAD(); | |
337 | ||
338 | /* discard any leaked ops */ | |
339 | if (PL_parser) | |
340 | parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(&cvbody)); | |
341 | opslab_force_free((OPSLAB *)CvSTART(&cvbody)); | |
342 | CvSTART(&cvbody) = NULL; | |
343 | ||
344 | LEAVE; | |
345 | } | |
7aef8e5b | 346 | #ifdef DEBUGGING |
52ec28d5 | 347 | else Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
8be227ab | 348 | #endif |
52ec28d5 DD |
349 | } |
350 | } | |
351 | else { /* dont bother checking if CvXSUB(cv) is true, less branching */ | |
352 | CvXSUB(&cvbody) = NULL; | |
353 | } | |
c4528262 | 354 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 355 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
b7acb0a3 | 356 | if (!(flags & CV_UNDEF_KEEP_NAME)) { |
52ec28d5 DD |
357 | if (CvNAMED(&cvbody)) { |
358 | CvNAME_HEK_set(&cvbody, NULL); | |
359 | CvNAMED_off(&cvbody); | |
b7acb0a3 FC |
360 | } |
361 | else CvGV_set(cv, NULL); | |
362 | } | |
c4528262 | 363 | |
c2736fce NC |
364 | /* This statement and the subsequence if block was pad_undef(). */ |
365 | pad_peg("pad_undef"); | |
366 | ||
eacbb379 | 367 | if (!CvISXSUB(&cvbody) && CvPADLIST(&cvbody)) { |
d12be05d | 368 | PADOFFSET ix; |
52ec28d5 | 369 | const PADLIST *padlist = CvPADLIST(&cvbody); |
c2736fce NC |
370 | |
371 | /* Free the padlist associated with a CV. | |
372 | If parts of it happen to be current, we null the relevant PL_*pad* | |
373 | global vars so that we don't have any dangling references left. | |
374 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
375 | subs to the outer of this cv. */ | |
376 | ||
377 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 378 | "Pad undef: cv=0x%" UVxf " padlist=0x%" UVxf " comppad=0x%" UVxf "\n", |
c2736fce NC |
379 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) |
380 | ); | |
381 | ||
382 | /* detach any '&' anon children in the pad; if afterwards they | |
383 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
384 | * bypassing us. */ | |
c2736fce NC |
385 | |
386 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
52ec28d5 DD |
387 | CV * const outercv = CvOUTSIDE(&cvbody); |
388 | const U32 seq = CvOUTSIDE_SEQ(&cvbody); | |
9b7476d7 | 389 | PADNAMELIST * const comppad_name = PadlistNAMES(padlist); |
cab74fca | 390 | PADNAME ** const namepad = PadnamelistARRAY(comppad_name); |
86d2498c | 391 | PAD * const comppad = PadlistARRAY(padlist)[1]; |
c2736fce | 392 | SV ** const curpad = AvARRAY(comppad); |
9b7476d7 | 393 | for (ix = PadnamelistMAX(comppad_name); ix > 0; ix--) { |
cab74fca FC |
394 | PADNAME * const name = namepad[ix]; |
395 | if (name && PadnamePV(name) && *PadnamePV(name) == '&') | |
c2736fce NC |
396 | { |
397 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
dce3f5c3 Z |
398 | U32 inner_rc; |
399 | assert(innercv); | |
e09ac076 | 400 | assert(SvTYPE(innercv) != SVt_PVFM); |
dce3f5c3 Z |
401 | inner_rc = SvREFCNT(innercv); |
402 | assert(inner_rc); | |
c2736fce NC |
403 | |
404 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
405 | curpad[ix] = NULL; | |
fc2b2dca | 406 | SvREFCNT_dec_NN(innercv); |
c2736fce NC |
407 | inner_rc--; |
408 | } | |
409 | ||
410 | /* in use, not just a prototype */ | |
b03210bf FC |
411 | if (inner_rc && SvTYPE(innercv) == SVt_PVCV |
412 | && (CvOUTSIDE(innercv) == cv)) | |
413 | { | |
c2736fce NC |
414 | assert(CvWEAKOUTSIDE(innercv)); |
415 | /* don't relink to grandfather if he's being freed */ | |
416 | if (outercv && SvREFCNT(outercv)) { | |
417 | CvWEAKOUTSIDE_off(innercv); | |
418 | CvOUTSIDE(innercv) = outercv; | |
419 | CvOUTSIDE_SEQ(innercv) = seq; | |
420 | SvREFCNT_inc_simple_void_NN(outercv); | |
421 | } | |
422 | else { | |
423 | CvOUTSIDE(innercv) = NULL; | |
424 | } | |
425 | } | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
86d2498c | 430 | ix = PadlistMAX(padlist); |
aa2f79cf | 431 | while (ix > 0) { |
86d2498c | 432 | PAD * const sv = PadlistARRAY(padlist)[ix--]; |
c2736fce | 433 | if (sv) { |
7261499d | 434 | if (sv == PL_comppad) { |
c2736fce NC |
435 | PL_comppad = NULL; |
436 | PL_curpad = NULL; | |
437 | } | |
fc2b2dca | 438 | SvREFCNT_dec_NN(sv); |
c2736fce | 439 | } |
aa2f79cf NC |
440 | } |
441 | { | |
9b7476d7 FC |
442 | PADNAMELIST * const names = PadlistNAMES(padlist); |
443 | if (names == PL_comppad_name && PadnamelistREFCNT(names) == 1) | |
aa2f79cf | 444 | PL_comppad_name = NULL; |
9b7476d7 | 445 | PadnamelistREFCNT_dec(names); |
c2736fce | 446 | } |
86d2498c | 447 | if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist)); |
7261499d | 448 | Safefree(padlist); |
eacbb379 | 449 | CvPADLIST_set(&cvbody, NULL); |
c2736fce | 450 | } |
db6e00bd DD |
451 | else if (CvISXSUB(&cvbody)) |
452 | CvHSCXT(&cvbody) = NULL; | |
eacbb379 | 453 | /* else is (!CvISXSUB(&cvbody) && !CvPADLIST(&cvbody)) {do nothing;} */ |
c2736fce | 454 | |
c4528262 NC |
455 | |
456 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
52ec28d5 DD |
457 | if (!SvREFCNT(cv)) { |
458 | CV * outside = CvOUTSIDE(&cvbody); | |
459 | if(outside) { | |
460 | CvOUTSIDE(&cvbody) = NULL; | |
461 | if (!CvWEAKOUTSIDE(&cvbody)) | |
462 | SvREFCNT_dec_NN(outside); | |
463 | } | |
c4528262 | 464 | } |
52ec28d5 DD |
465 | if (CvCONST(&cvbody)) { |
466 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(&cvbody).any_ptr)); | |
467 | /* CvCONST_off(cv); *//* turned off below */ | |
c4528262 NC |
468 | } |
469 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
b7acb0a3 FC |
470 | * ref status of CvOUTSIDE and CvGV, and ANON, NAMED and |
471 | * LEXICAL, which are used to determine the sub's name. */ | |
52ec28d5 | 472 | CvFLAGS(&cvbody) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON|CVf_LEXICAL |
b7acb0a3 | 473 | |CVf_NAMED); |
c4528262 | 474 | } |
dd2155a4 | 475 | |
50dc2bd3 FC |
476 | /* |
477 | =for apidoc cv_forget_slab | |
478 | ||
796b6530 | 479 | When a CV has a reference count on its slab (C<CvSLABBED>), it is responsible |
50dc2bd3 FC |
480 | for making sure it is freed. (Hence, no two CVs should ever have a |
481 | reference count on the same slab.) The CV only needs to reference the slab | |
796b6530 | 482 | during compilation. Once it is compiled and C<CvROOT> attached, it has |
50dc2bd3 FC |
483 | finished its job, so it can forget the slab. |
484 | ||
485 | =cut | |
486 | */ | |
487 | ||
8be227ab FC |
488 | void |
489 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
490 | { | |
de0885da | 491 | bool slabbed; |
3107b51f | 492 | OPSLAB *slab = NULL; |
8be227ab | 493 | |
de0885da DM |
494 | if (!cv) |
495 | return; | |
496 | slabbed = cBOOL(CvSLABBED(cv)); | |
8be227ab FC |
497 | if (!slabbed) return; |
498 | ||
499 | CvSLABBED_off(cv); | |
500 | ||
3107b51f FC |
501 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
502 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 503 | #ifdef DEBUGGING |
eb212a1c | 504 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
7aef8e5b | 505 | #endif |
3107b51f | 506 | |
3107b51f | 507 | if (slab) { |
f3e29105 NC |
508 | #ifdef PERL_DEBUG_READONLY_OPS |
509 | const size_t refcnt = slab->opslab_refcnt; | |
510 | #endif | |
3107b51f | 511 | OpslabREFCNT_dec(slab); |
f3e29105 | 512 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 513 | if (refcnt > 1) Slab_to_ro(slab); |
8be227ab | 514 | #endif |
f3e29105 | 515 | } |
7aef8e5b | 516 | } |
8be227ab | 517 | |
cc76b5cc | 518 | /* |
307a54be | 519 | =for apidoc m|PADOFFSET|pad_alloc_name|PADNAME *name|U32 flags|HV *typestash|HV *ourstash |
cc76b5cc | 520 | |
1a115e49 FC |
521 | Allocates a place in the currently-compiling |
522 | pad (via L<perlapi/pad_alloc>) and | |
2d7f6611 | 523 | then stores a name for that entry. C<name> is adopted and |
307a54be | 524 | becomes the name entry; it must already contain the name |
2d7f6611 KW |
525 | string. C<typestash> and C<ourstash> and the C<padadd_STATE> |
526 | flag get added to C<name>. None of the other | |
1a115e49 | 527 | processing of L<perlapi/pad_add_name_pvn> |
cc76b5cc Z |
528 | is done. Returns the offset of the allocated pad slot. |
529 | ||
530 | =cut | |
531 | */ | |
532 | ||
3291825f | 533 | static PADOFFSET |
e1c02f84 FC |
534 | S_pad_alloc_name(pTHX_ PADNAME *name, U32 flags, HV *typestash, |
535 | HV *ourstash) | |
3291825f | 536 | { |
3291825f NC |
537 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
538 | ||
cc76b5cc | 539 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 540 | |
cc76b5cc | 541 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
542 | |
543 | if (typestash) { | |
e1c02f84 | 544 | SvPAD_TYPED_on(name); |
0f94cb1f FC |
545 | PadnameTYPE(name) = |
546 | MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash))); | |
3291825f NC |
547 | } |
548 | if (ourstash) { | |
e1c02f84 FC |
549 | SvPAD_OUR_on(name); |
550 | SvOURSTASH_set(name, ourstash); | |
3291825f NC |
551 | SvREFCNT_inc_simple_void_NN(ourstash); |
552 | } | |
59cfed7d | 553 | else if (flags & padadd_STATE) { |
e1c02f84 | 554 | SvPAD_STATE_on(name); |
3291825f NC |
555 | } |
556 | ||
0f94cb1f | 557 | padnamelist_store(PL_comppad_name, offset, name); |
dd5d1b89 FC |
558 | if (PadnameLEN(name) > 1) |
559 | PadnamelistMAXNAMED(PL_comppad_name) = offset; | |
3291825f NC |
560 | return offset; |
561 | } | |
562 | ||
dd2155a4 | 563 | /* |
cc76b5cc | 564 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 565 | |
cc76b5cc Z |
566 | Allocates a place in the currently-compiling pad for a named lexical |
567 | variable. Stores the name and other metadata in the name part of the | |
568 | pad, and makes preparations to manage the variable's lexical scoping. | |
569 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 570 | |
2d7f6611 KW |
571 | C<namepv>/C<namelen> specify the variable's name, including leading sigil. |
572 | If C<typestash> is non-null, the name is for a typed lexical, and this | |
573 | identifies the type. If C<ourstash> is non-null, it's a lexical reference | |
cc76b5cc Z |
574 | to a package variable, and this identifies the package. The following |
575 | flags can be OR'ed together: | |
576 | ||
8560fbdd KW |
577 | padadd_OUR redundantly specifies if it's a package var |
578 | padadd_STATE variable will retain value persistently | |
579 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
580 | |
581 | =cut | |
582 | */ | |
583 | ||
dd2155a4 | 584 | PADOFFSET |
cc76b5cc Z |
585 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
586 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 587 | { |
3291825f | 588 | PADOFFSET offset; |
e1c02f84 | 589 | PADNAME *name; |
dd2155a4 | 590 | |
cc76b5cc | 591 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 592 | |
2502ffdf | 593 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK)) |
cc76b5cc | 594 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
595 | (UV)flags); |
596 | ||
0f94cb1f | 597 | name = newPADNAMEpvn(namepv, namelen); |
dd2155a4 | 598 | |
59cfed7d | 599 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
c2b36a6d | 600 | ENTER; |
0f94cb1f | 601 | SAVEFREEPADNAME(name); /* in case of fatal warnings */ |
2d12d04f | 602 | /* check for duplicate declaration */ |
e1c02f84 | 603 | pad_check_dup(name, flags & padadd_OUR, ourstash); |
0f94cb1f | 604 | PadnameREFCNT(name)++; |
c2b36a6d | 605 | LEAVE; |
2d12d04f NC |
606 | } |
607 | ||
2502ffdf | 608 | offset = pad_alloc_name(name, flags, typestash, ourstash); |
3291825f NC |
609 | |
610 | /* not yet introduced */ | |
e1c02f84 FC |
611 | COP_SEQ_RANGE_LOW_set(name, PERL_PADSEQ_INTRO); |
612 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
3291825f NC |
613 | |
614 | if (!PL_min_intro_pending) | |
615 | PL_min_intro_pending = offset; | |
616 | PL_max_intro_pending = offset; | |
617 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
618 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
619 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 620 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 621 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 622 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 | 623 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
6d5c2147 FC |
624 | else if (namelen != 0 && *namepv == '&') |
625 | sv_upgrade(PL_curpad[offset], SVt_PVCV); | |
c1bf42f3 | 626 | assert(SvPADMY(PL_curpad[offset])); |
3291825f | 627 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
147e3846 | 628 | "Pad addname: %ld \"%s\" new lex=0x%" UVxf "\n", |
e1c02f84 | 629 | (long)offset, PadnamePV(name), |
cc76b5cc | 630 | PTR2UV(PL_curpad[offset]))); |
dd2155a4 DM |
631 | |
632 | return offset; | |
633 | } | |
634 | ||
cc76b5cc Z |
635 | /* |
636 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 637 | |
cc76b5cc Z |
638 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
639 | instead of a string/length pair. | |
dd2155a4 | 640 | |
cc76b5cc Z |
641 | =cut |
642 | */ | |
643 | ||
644 | PADOFFSET | |
645 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 646 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
647 | { |
648 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
649 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
650 | } | |
dd2155a4 DM |
651 | |
652 | /* | |
cc76b5cc | 653 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 654 | |
cc76b5cc Z |
655 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
656 | of an SV instead of a string/length pair. | |
657 | ||
658 | =cut | |
659 | */ | |
660 | ||
661 | PADOFFSET | |
662 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
663 | { | |
664 | char *namepv; | |
665 | STRLEN namelen; | |
666 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
2502ffdf | 667 | namepv = SvPVutf8(name, namelen); |
cc76b5cc Z |
668 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
669 | } | |
670 | ||
671 | /* | |
672 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
673 | ||
674 | Allocates a place in the currently-compiling pad, | |
675 | returning the offset of the allocated pad slot. | |
676 | No name is initially attached to the pad slot. | |
2d7f6611 | 677 | C<tmptype> is a set of flags indicating the kind of pad entry required, |
cc76b5cc Z |
678 | which will be set in the value SV for the allocated pad entry: |
679 | ||
680 | SVs_PADMY named lexical variable ("my", "our", "state") | |
681 | SVs_PADTMP unnamed temporary store | |
325e1816 FC |
682 | SVf_READONLY constant shared between recursion levels |
683 | ||
684 | C<SVf_READONLY> has been supported here only since perl 5.20. To work with | |
c370bd2e FC |
685 | earlier versions as well, use C<SVf_READONLY|SVs_PADTMP>. C<SVf_READONLY> |
686 | does not cause the SV in the pad slot to be marked read-only, but simply | |
687 | tells C<pad_alloc> that it I<will> be made read-only (by the caller), or at | |
688 | least should be treated as such. | |
cc76b5cc | 689 | |
2d7f6611 | 690 | C<optype> should be an opcode indicating the type of operation that the |
cc76b5cc Z |
691 | pad entry is to support. This doesn't affect operational semantics, |
692 | but is used for debugging. | |
dd2155a4 DM |
693 | |
694 | =cut | |
695 | */ | |
696 | ||
dd2155a4 DM |
697 | PADOFFSET |
698 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
699 | { | |
700 | SV *sv; | |
d12be05d | 701 | PADOFFSET retval; |
dd2155a4 | 702 | |
6136c704 | 703 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
704 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
705 | ||
dd2155a4 | 706 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
707 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
708 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
709 | if (PL_pad_reset_pending) |
710 | pad_reset(); | |
c0683843 | 711 | if (tmptype == SVs_PADMY) { /* Not & because this ‘flag’ is 0. */ |
cc76b5cc | 712 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 713 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
d12be05d | 714 | retval = (PADOFFSET)AvFILLp(PL_comppad); |
dd2155a4 DM |
715 | } |
716 | else { | |
cc76b5cc Z |
717 | /* For a tmp, scan the pad from PL_padix upwards |
718 | * for a slot which has no name and no active value. | |
b54c5e14 | 719 | * For a constant, likewise, but use PL_constpadix. |
cc76b5cc | 720 | */ |
9b7476d7 FC |
721 | PADNAME * const * const names = PadnamelistARRAY(PL_comppad_name); |
722 | const SSize_t names_fill = PadnamelistMAX(PL_comppad_name); | |
b54c5e14 FC |
723 | const bool konst = cBOOL(tmptype & SVf_READONLY); |
724 | retval = konst ? PL_constpadix : PL_padix; | |
dd2155a4 DM |
725 | for (;;) { |
726 | /* | |
833bf1cd FC |
727 | * Entries that close over unavailable variables |
728 | * in outer subs contain values not marked PADMY. | |
729 | * Thus we must skip, not just pad values that are | |
dd2155a4 | 730 | * marked as current pad values, but also those with names. |
1780e744 FC |
731 | * If pad_reset is enabled, ‘current’ means different |
732 | * things depending on whether we are allocating a con- | |
733 | * stant or a target. For a target, things marked PADTMP | |
734 | * can be reused; not so for constants. | |
dd2155a4 | 735 | */ |
5e6246a7 | 736 | PADNAME *pn; |
b54c5e14 | 737 | if (++retval <= names_fill && |
5e6246a7 | 738 | (pn = names[retval]) && PadnamePV(pn)) |
dd2155a4 | 739 | continue; |
b54c5e14 | 740 | sv = *av_fetch(PL_comppad, retval, TRUE); |
a90643eb | 741 | if (!(SvFLAGS(sv) & |
53de1311 | 742 | #ifdef USE_PAD_RESET |
5debce0a | 743 | (konst ? SVs_PADTMP : 0) |
a90643eb | 744 | #else |
145bf8ee | 745 | SVs_PADTMP |
a90643eb | 746 | #endif |
13381c39 | 747 | )) |
dd2155a4 DM |
748 | break; |
749 | } | |
b54c5e14 | 750 | if (konst) { |
0f94cb1f | 751 | padnamelist_store(PL_comppad_name, retval, &PL_padname_const); |
325e1816 FC |
752 | tmptype &= ~SVf_READONLY; |
753 | tmptype |= SVs_PADTMP; | |
754 | } | |
b54c5e14 | 755 | *(konst ? &PL_constpadix : &PL_padix) = retval; |
dd2155a4 DM |
756 | } |
757 | SvFLAGS(sv) |= tmptype; | |
758 | PL_curpad = AvARRAY(PL_comppad); | |
759 | ||
760 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 761 | "Pad 0x%" UVxf "[0x%" UVxf "] alloc: %ld for %s\n", |
dd2155a4 DM |
762 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, |
763 | PL_op_name[optype])); | |
fd0854ff DM |
764 | #ifdef DEBUG_LEAKING_SCALARS |
765 | sv->sv_debug_optype = optype; | |
766 | sv->sv_debug_inpad = 1; | |
fd0854ff | 767 | #endif |
d12be05d | 768 | return retval; |
dd2155a4 DM |
769 | } |
770 | ||
771 | /* | |
cc76b5cc | 772 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 773 | |
cc76b5cc Z |
774 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
775 | for an anonymous function that is lexically scoped inside the | |
776 | currently-compiling function. | |
2d7f6611 | 777 | The function C<func> is linked into the pad, and its C<CvOUTSIDE> link |
cc76b5cc Z |
778 | to the outer scope is weakened to avoid a reference loop. |
779 | ||
84eea980 FC |
780 | One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>. |
781 | ||
2d7f6611 | 782 | C<optype> should be an opcode indicating the type of operation that the |
cc76b5cc Z |
783 | pad entry is to support. This doesn't affect operational semantics, |
784 | but is used for debugging. | |
dd2155a4 DM |
785 | |
786 | =cut | |
787 | */ | |
788 | ||
789 | PADOFFSET | |
cc76b5cc | 790 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 DM |
791 | { |
792 | PADOFFSET ix; | |
0f94cb1f | 793 | PADNAME * const name = newPADNAMEpvn("&", 1); |
7918f24d NC |
794 | |
795 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
74a9453a | 796 | assert (SvTYPE(func) == SVt_PVCV); |
7918f24d | 797 | |
1dba731d | 798 | pad_peg("add_anon"); |
0d311cdb | 799 | /* These two aren't used; just make sure they're not equal to |
0f94cb1f FC |
800 | * PERL_PADSEQ_INTRO. They should be 0 by default. */ |
801 | assert(COP_SEQ_RANGE_LOW (name) != PERL_PADSEQ_INTRO); | |
802 | assert(COP_SEQ_RANGE_HIGH(name) != PERL_PADSEQ_INTRO); | |
cc76b5cc | 803 | ix = pad_alloc(optype, SVs_PADMY); |
9b7476d7 | 804 | padnamelist_store(PL_comppad_name, ix, name); |
74a9453a | 805 | av_store(PL_comppad, ix, (SV*)func); |
7dafbf52 DM |
806 | |
807 | /* to avoid ref loops, we never have parent + child referencing each | |
808 | * other simultaneously */ | |
74a9453a | 809 | if (CvOUTSIDE(func)) { |
cc76b5cc Z |
810 | assert(!CvWEAKOUTSIDE(func)); |
811 | CvWEAKOUTSIDE_on(func); | |
fc2b2dca | 812 | SvREFCNT_dec_NN(CvOUTSIDE(func)); |
7dafbf52 | 813 | } |
dd2155a4 DM |
814 | return ix; |
815 | } | |
816 | ||
a70f21d0 FC |
817 | void |
818 | Perl_pad_add_weakref(pTHX_ CV* func) | |
819 | { | |
820 | const PADOFFSET ix = pad_alloc(OP_NULL, SVs_PADMY); | |
821 | PADNAME * const name = newPADNAMEpvn("&", 1); | |
822 | SV * const rv = newRV_inc((SV *)func); | |
823 | ||
824 | PERL_ARGS_ASSERT_PAD_ADD_WEAKREF; | |
825 | ||
826 | /* These two aren't used; just make sure they're not equal to | |
827 | * PERL_PADSEQ_INTRO. They should be 0 by default. */ | |
828 | assert(COP_SEQ_RANGE_LOW (name) != PERL_PADSEQ_INTRO); | |
829 | assert(COP_SEQ_RANGE_HIGH(name) != PERL_PADSEQ_INTRO); | |
830 | padnamelist_store(PL_comppad_name, ix, name); | |
831 | sv_rvweaken(rv); | |
832 | av_store(PL_comppad, ix, rv); | |
833 | } | |
834 | ||
dd2155a4 | 835 | /* |
13087dd8 | 836 | =for apidoc pad_check_dup |
dd2155a4 DM |
837 | |
838 | Check for duplicate declarations: report any of: | |
13087dd8 | 839 | |
796b6530 KW |
840 | * a 'my' in the current scope with the same name; |
841 | * an 'our' (anywhere in the pad) with the same name and the | |
842 | same stash as 'ourstash' | |
13087dd8 | 843 | |
796b6530 | 844 | C<is_our> indicates that the name to check is an C<"our"> declaration. |
dd2155a4 DM |
845 | |
846 | =cut | |
847 | */ | |
848 | ||
20381b50 | 849 | STATIC void |
e1c02f84 | 850 | S_pad_check_dup(pTHX_ PADNAME *name, U32 flags, const HV *ourstash) |
dd2155a4 | 851 | { |
0aaff5a1 | 852 | PADNAME **svp; |
dd2155a4 | 853 | PADOFFSET top, off; |
59cfed7d | 854 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 855 | |
7918f24d NC |
856 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
857 | ||
f3548bdc | 858 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 859 | |
59cfed7d | 860 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 861 | |
52e3acf8 | 862 | if (PadnamelistMAX(PL_comppad_name) < 0 || !ckWARN(WARN_SHADOW)) |
dd2155a4 DM |
863 | return; /* nothing to check */ |
864 | ||
9b7476d7 FC |
865 | svp = PadnamelistARRAY(PL_comppad_name); |
866 | top = PadnamelistMAX(PL_comppad_name); | |
dd2155a4 | 867 | /* check the current scope */ |
d12be05d | 868 | for (off = top; off > PL_comppad_name_floor; off--) { |
0aaff5a1 | 869 | PADNAME * const sv = svp[off]; |
53c1dcc0 | 870 | if (sv |
0aaff5a1 FC |
871 | && PadnameLEN(sv) == PadnameLEN(name) |
872 | && !PadnameOUTER(sv) | |
0d311cdb DM |
873 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
874 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
0aaff5a1 | 875 | && memEQ(PadnamePV(sv), PadnamePV(name), PadnameLEN(name))) |
dd2155a4 | 876 | { |
00b1698f | 877 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 878 | break; /* "our" masking "our" */ |
4eb94d7c | 879 | /* diag_listed_as: "%s" variable %s masks earlier declaration in same %s */ |
52e3acf8 | 880 | Perl_warner(aTHX_ packWARN(WARN_SHADOW), |
147e3846 | 881 | "\"%s\" %s %" PNf " masks earlier declaration in same %s", |
49fb8620 DM |
882 | ( is_our ? "our" : |
883 | PL_parser->in_my == KEY_my ? "my" : | |
884 | PL_parser->in_my == KEY_sigvar ? "my" : | |
885 | "state" ), | |
0aaff5a1 FC |
886 | *PadnamePV(sv) == '&' ? "subroutine" : "variable", |
887 | PNfARG(sv), | |
2df5bdd7 DM |
888 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
889 | ? "scope" : "statement")); | |
dd2155a4 DM |
890 | --off; |
891 | break; | |
892 | } | |
893 | } | |
894 | /* check the rest of the pad */ | |
895 | if (is_our) { | |
61c5492a | 896 | while (off > 0) { |
0aaff5a1 | 897 | PADNAME * const sv = svp[off]; |
53c1dcc0 | 898 | if (sv |
0aaff5a1 FC |
899 | && PadnameLEN(sv) == PadnameLEN(name) |
900 | && !PadnameOUTER(sv) | |
0d311cdb DM |
901 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
902 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 903 | && SvOURSTASH(sv) == ourstash |
0aaff5a1 | 904 | && memEQ(PadnamePV(sv), PadnamePV(name), PadnameLEN(name))) |
dd2155a4 | 905 | { |
52e3acf8 | 906 | Perl_warner(aTHX_ packWARN(WARN_SHADOW), |
147e3846 | 907 | "\"our\" variable %" PNf " redeclared", PNfARG(sv)); |
d12be05d | 908 | if (off <= PL_comppad_name_floor) |
52e3acf8 | 909 | Perl_warner(aTHX_ packWARN(WARN_SHADOW), |
7f73a9f1 | 910 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); |
dd2155a4 DM |
911 | break; |
912 | } | |
61c5492a NC |
913 | --off; |
914 | } | |
dd2155a4 DM |
915 | } |
916 | } | |
917 | ||
918 | ||
dd2155a4 | 919 | /* |
cc76b5cc | 920 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 921 | |
cc76b5cc Z |
922 | Given the name of a lexical variable, find its position in the |
923 | currently-compiling pad. | |
2d7f6611 KW |
924 | C<namepv>/C<namelen> specify the variable's name, including leading sigil. |
925 | C<flags> is reserved and must be zero. | |
cc76b5cc Z |
926 | If it is not in the current pad but appears in the pad of any lexically |
927 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
928 | Returns the offset in the current pad, | |
929 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
930 | |
931 | =cut | |
932 | */ | |
933 | ||
934 | PADOFFSET | |
cc76b5cc | 935 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 936 | { |
e1c02f84 | 937 | PADNAME *out_pn; |
b5c19bd7 | 938 | int out_flags; |
d12be05d | 939 | PADOFFSET offset; |
9b7476d7 | 940 | const PADNAMELIST *namelist; |
e1c02f84 | 941 | PADNAME **name_p; |
dd2155a4 | 942 | |
cc76b5cc | 943 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 944 | |
cc76b5cc | 945 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 946 | |
2502ffdf | 947 | if (flags) |
cc76b5cc | 948 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
949 | (UV)flags); |
950 | ||
b12396ac TC |
951 | /* compilation errors can zero PL_compcv */ |
952 | if (!PL_compcv) | |
953 | return NOT_IN_PAD; | |
954 | ||
fbb889c8 | 955 | offset = pad_findlex(namepv, namelen, flags, |
e1c02f84 | 956 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_pn, &out_flags); |
d12be05d | 957 | if (offset != NOT_IN_PAD) |
929a0744 DM |
958 | return offset; |
959 | ||
f0727190 FC |
960 | /* Skip the ‘our’ hack for subroutines, as the warning does not apply. |
961 | */ | |
962 | if (*namepv == '&') return NOT_IN_PAD; | |
963 | ||
929a0744 DM |
964 | /* look for an our that's being introduced; this allows |
965 | * our $foo = 0 unless defined $foo; | |
966 | * to not give a warning. (Yes, this is a hack) */ | |
967 | ||
9b7476d7 FC |
968 | namelist = PadlistNAMES(CvPADLIST(PL_compcv)); |
969 | name_p = PadnamelistARRAY(namelist); | |
970 | for (offset = PadnamelistMAXNAMED(namelist); offset > 0; offset--) { | |
e1c02f84 FC |
971 | const PADNAME * const name = name_p[offset]; |
972 | if (name && PadnameLEN(name) == namelen | |
973 | && !PadnameOUTER(name) | |
974 | && (PadnameIsOUR(name)) | |
2502ffdf FC |
975 | && ( PadnamePV(name) == namepv |
976 | || memEQ(PadnamePV(name), namepv, namelen) ) | |
e1c02f84 | 977 | && COP_SEQ_RANGE_LOW(name) == PERL_PADSEQ_INTRO |
929a0744 DM |
978 | ) |
979 | return offset; | |
980 | } | |
981 | return NOT_IN_PAD; | |
dd2155a4 DM |
982 | } |
983 | ||
e1f795dc | 984 | /* |
cc76b5cc Z |
985 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
986 | ||
987 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
988 | instead of a string/length pair. | |
989 | ||
990 | =cut | |
991 | */ | |
992 | ||
993 | PADOFFSET | |
994 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
995 | { | |
996 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
997 | return pad_findmy_pvn(name, strlen(name), flags); | |
998 | } | |
999 | ||
1000 | /* | |
1001 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
1002 | ||
1003 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
1004 | of an SV instead of a string/length pair. | |
1005 | ||
1006 | =cut | |
1007 | */ | |
1008 | ||
1009 | PADOFFSET | |
1010 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1011 | { | |
1012 | char *namepv; | |
1013 | STRLEN namelen; | |
1014 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
2502ffdf | 1015 | namepv = SvPVutf8(name, namelen); |
cc76b5cc Z |
1016 | return pad_findmy_pvn(namepv, namelen, flags); |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1021 | ||
af7ce3e6 FC |
1022 | Until the lexical C<$_> feature was removed, this function would |
1023 | find the position of the lexical C<$_> in the pad of the | |
1cdc5f0b | 1024 | currently-executing function and return the offset in the current pad, |
af7ce3e6 FC |
1025 | or C<NOT_IN_PAD>. |
1026 | ||
1027 | Now it always returns C<NOT_IN_PAD>. | |
cc76b5cc Z |
1028 | |
1029 | =cut | |
1030 | */ | |
e1f795dc RGS |
1031 | |
1032 | PADOFFSET | |
29289021 | 1033 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 1034 | { |
af7ce3e6 FC |
1035 | PERL_UNUSED_CONTEXT; /* Can we just remove the pTHX from the sig? */ |
1036 | return NOT_IN_PAD; | |
e1f795dc | 1037 | } |
dd2155a4 | 1038 | |
dd2155a4 | 1039 | /* |
cc76b5cc Z |
1040 | =for apidoc Am|SV *|find_rundefsv |
1041 | ||
af7ce3e6 | 1042 | Returns the global variable C<$_>. |
cc76b5cc Z |
1043 | |
1044 | =cut | |
1045 | */ | |
789bd863 VP |
1046 | |
1047 | SV * | |
1048 | Perl_find_rundefsv(pTHX) | |
1049 | { | |
af7ce3e6 | 1050 | return DEFSV; |
789bd863 VP |
1051 | } |
1052 | ||
1053 | /* | |
e1c02f84 | 1054 | =for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|PADNAME** out_name|int *out_flags |
dd2155a4 | 1055 | |
72d33970 | 1056 | Find a named lexical anywhere in a chain of nested pads. Add fake entries |
b5c19bd7 DM |
1057 | in the inner pads if it's found in an outer one. |
1058 | ||
1059 | Returns the offset in the bottom pad of the lex or the fake lex. | |
796b6530 KW |
1060 | C<cv> is the CV in which to start the search, and seq is the current C<cop_seq> |
1061 | to match against. If C<warn> is true, print appropriate warnings. The C<out_>* | |
b5c19bd7 | 1062 | vars return values, and so are pointers to where the returned values |
796b6530 KW |
1063 | should be stored. C<out_capture>, if non-null, requests that the innermost |
1064 | instance of the lexical is captured; C<out_name> is set to the innermost | |
1065 | matched pad name or fake pad name; C<out_flags> returns the flags normally | |
1066 | associated with the C<PARENT_FAKELEX_FLAGS> field of a fake pad name. | |
b5c19bd7 | 1067 | |
796b6530 | 1068 | Note that C<pad_findlex()> is recursive; it recurses up the chain of CVs, |
72d33970 FC |
1069 | then comes back down, adding fake entries |
1070 | as it goes. It has to be this way | |
9420b268 DM |
1071 | because fake names in anon protoypes have to store in C<xpadn_low> the |
1072 | index into the parent pad. | |
dd2155a4 DM |
1073 | |
1074 | =cut | |
1075 | */ | |
1076 | ||
b5c19bd7 DM |
1077 | /* the CV has finished being compiled. This is not a sufficient test for |
1078 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1079 | #define CvCOMPILED(cv) CvROOT(cv) | |
1080 | ||
71f882da | 1081 | /* the CV does late binding of its lexicals */ |
e07561e6 | 1082 | #define CvLATE(cv) (CvANON(cv) || CvCLONE(cv) || SvTYPE(cv) == SVt_PVFM) |
71f882da | 1083 | |
445f13ff | 1084 | static void |
e6df7a56 | 1085 | S_unavailable(pTHX_ PADNAME *name) |
445f13ff FC |
1086 | { |
1087 | /* diag_listed_as: Variable "%s" is not available */ | |
1088 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
147e3846 | 1089 | "%se \"%" PNf "\" is not available", |
e6df7a56 | 1090 | *PadnamePV(name) == '&' |
445f13ff FC |
1091 | ? "Subroutin" |
1092 | : "Variabl", | |
e6df7a56 | 1093 | PNfARG(name)); |
445f13ff | 1094 | } |
b5c19bd7 | 1095 | |
dd2155a4 | 1096 | STATIC PADOFFSET |
fbb889c8 | 1097 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
e1c02f84 | 1098 | int warn, SV** out_capture, PADNAME** out_name, int *out_flags) |
dd2155a4 | 1099 | { |
d12be05d | 1100 | PADOFFSET offset, new_offset; |
b5c19bd7 DM |
1101 | SV *new_capture; |
1102 | SV **new_capturep; | |
b70d5558 | 1103 | const PADLIST * const padlist = CvPADLIST(cv); |
7ef30830 | 1104 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1105 | |
7918f24d NC |
1106 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1107 | ||
2502ffdf FC |
1108 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
1109 | if (flags) | |
2435e5d3 BF |
1110 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1111 | (UV)flags); | |
1112 | ||
b5c19bd7 | 1113 | *out_flags = 0; |
a3985cdc | 1114 | |
b5c19bd7 | 1115 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
147e3846 | 1116 | "Pad findlex cv=0x%" UVxf " searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1117 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1118 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1119 | |
b5c19bd7 | 1120 | /* first, search this pad */ |
dd2155a4 | 1121 | |
b5c19bd7 | 1122 | if (padlist) { /* not an undef CV */ |
d12be05d | 1123 | PADOFFSET fake_offset = 0; |
9b7476d7 FC |
1124 | const PADNAMELIST * const names = PadlistNAMES(padlist); |
1125 | PADNAME * const * const name_p = PadnamelistARRAY(names); | |
ee6cee0c | 1126 | |
9b7476d7 | 1127 | for (offset = PadnamelistMAXNAMED(names); offset > 0; offset--) { |
e1c02f84 FC |
1128 | const PADNAME * const name = name_p[offset]; |
1129 | if (name && PadnameLEN(name) == namelen | |
2502ffdf FC |
1130 | && ( PadnamePV(name) == namepv |
1131 | || memEQ(PadnamePV(name), namepv, namelen) )) | |
b5c19bd7 | 1132 | { |
e1c02f84 | 1133 | if (PadnameOUTER(name)) { |
b5c19bd7 | 1134 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1135 | continue; |
1136 | } | |
e1c02f84 | 1137 | if (PadnameIN_SCOPE(name, seq)) |
03414f05 | 1138 | break; |
ee6cee0c DM |
1139 | } |
1140 | } | |
1141 | ||
b5c19bd7 DM |
1142 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1143 | if (offset > 0) { /* not fake */ | |
1144 | fake_offset = 0; | |
e1c02f84 | 1145 | *out_name = name_p[offset]; /* return the name */ |
b5c19bd7 DM |
1146 | |
1147 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1148 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1149 | * ideally, we should detect my's declared within loops | |
1150 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1151 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1152 | * lexes as not multi as viewed from evals. */ |
1153 | ||
1154 | *out_flags = CvANON(cv) ? | |
1155 | PAD_FAKELEX_ANON : | |
1156 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1157 | ? PAD_FAKELEX_MULTI : 0; | |
1158 | ||
1159 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1160 | "Pad findlex cv=0x%" UVxf " matched: offset=%ld (%lu,%lu)\n", |
809abb02 | 1161 | PTR2UV(cv), (long)offset, |
e1c02f84 FC |
1162 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name), |
1163 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name))); | |
b5c19bd7 DM |
1164 | } |
1165 | else { /* fake match */ | |
1166 | offset = fake_offset; | |
e1c02f84 FC |
1167 | *out_name = name_p[offset]; /* return the name */ |
1168 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name); | |
b5c19bd7 | 1169 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
147e3846 | 1170 | "Pad findlex cv=0x%" UVxf " matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1171 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
e1c02f84 | 1172 | (unsigned long) PARENT_PAD_INDEX(*out_name) |
b5c19bd7 DM |
1173 | )); |
1174 | } | |
dd2155a4 | 1175 | |
b5c19bd7 | 1176 | /* return the lex? */ |
dd2155a4 | 1177 | |
b5c19bd7 | 1178 | if (out_capture) { |
dd2155a4 | 1179 | |
b5c19bd7 | 1180 | /* our ? */ |
e1c02f84 | 1181 | if (PadnameIsOUR(*out_name)) { |
a0714e2c | 1182 | *out_capture = NULL; |
b5c19bd7 DM |
1183 | return offset; |
1184 | } | |
ee6cee0c | 1185 | |
b5c19bd7 DM |
1186 | /* trying to capture from an anon prototype? */ |
1187 | if (CvCOMPILED(cv) | |
1188 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1189 | : *out_flags & PAD_FAKELEX_ANON) | |
1190 | { | |
a2a5de95 | 1191 | if (warn) |
445f13ff | 1192 | S_unavailable(aTHX_ |
f5658c36 | 1193 | *out_name); |
0727928e | 1194 | |
a0714e2c | 1195 | *out_capture = NULL; |
b5c19bd7 | 1196 | } |
ee6cee0c | 1197 | |
b5c19bd7 DM |
1198 | /* real value */ |
1199 | else { | |
1200 | int newwarn = warn; | |
1201 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
e1c02f84 | 1202 | && !PadnameIsSTATE(name_p[offset]) |
b5c19bd7 DM |
1203 | && warn && ckWARN(WARN_CLOSURE)) { |
1204 | newwarn = 0; | |
2a9203e9 FC |
1205 | /* diag_listed_as: Variable "%s" will not stay |
1206 | shared */ | |
b5c19bd7 | 1207 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
147e3846 | 1208 | "%se \"%" UTF8f "\" will not stay shared", |
2a9203e9 | 1209 | *namepv == '&' ? "Subroutin" : "Variabl", |
8d98b5bc | 1210 | UTF8fARG(1, namelen, namepv)); |
b5c19bd7 | 1211 | } |
dd2155a4 | 1212 | |
b5c19bd7 DM |
1213 | if (fake_offset && CvANON(cv) |
1214 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1215 | { | |
e1c02f84 | 1216 | PADNAME *n; |
b5c19bd7 DM |
1217 | /* not yet caught - look further up */ |
1218 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1219 | "Pad findlex cv=0x%" UVxf " chasing lex in outer pad\n", |
b5c19bd7 | 1220 | PTR2UV(cv))); |
e1c02f84 | 1221 | n = *out_name; |
fbb889c8 | 1222 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1223 | CvOUTSIDE_SEQ(cv), |
e1c02f84 FC |
1224 | newwarn, out_capture, out_name, out_flags); |
1225 | *out_name = n; | |
b5c19bd7 | 1226 | return offset; |
dd2155a4 | 1227 | } |
b5c19bd7 | 1228 | |
86d2498c | 1229 | *out_capture = AvARRAY(PadlistARRAY(padlist)[ |
7261499d | 1230 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; |
b5c19bd7 | 1231 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
147e3846 | 1232 | "Pad findlex cv=0x%" UVxf " found lex=0x%" UVxf "\n", |
19a5c512 | 1233 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1234 | |
d1186544 | 1235 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1236 | && (!CvDEPTH(cv) || !staleok) |
e1c02f84 | 1237 | && !PadnameIsSTATE(name_p[offset])) |
d1186544 | 1238 | { |
445f13ff | 1239 | S_unavailable(aTHX_ |
f5658c36 | 1240 | name_p[offset]); |
a0714e2c | 1241 | *out_capture = NULL; |
dd2155a4 DM |
1242 | } |
1243 | } | |
b5c19bd7 | 1244 | if (!*out_capture) { |
cc76b5cc | 1245 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1246 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1247 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1248 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
6d5c2147 FC |
1249 | else if (namelen != 0 && *namepv == '&') |
1250 | *out_capture = sv_2mortal(newSV_type(SVt_PVCV)); | |
b5c19bd7 DM |
1251 | else |
1252 | *out_capture = sv_newmortal(); | |
1253 | } | |
dd2155a4 | 1254 | } |
b5c19bd7 DM |
1255 | |
1256 | return offset; | |
ee6cee0c | 1257 | } |
b5c19bd7 DM |
1258 | } |
1259 | ||
1260 | /* it's not in this pad - try above */ | |
1261 | ||
1262 | if (!CvOUTSIDE(cv)) | |
1263 | return NOT_IN_PAD; | |
9f7d9405 | 1264 | |
b5c19bd7 | 1265 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1266 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1267 | new_capturep = out_capture ? out_capture : |
4608196e | 1268 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1269 | |
7ef30830 FC |
1270 | offset = pad_findlex(namepv, namelen, |
1271 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1272 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
e1c02f84 | 1273 | new_capturep, out_name, out_flags); |
d12be05d | 1274 | if (offset == NOT_IN_PAD) |
b5c19bd7 | 1275 | return NOT_IN_PAD; |
9f7d9405 | 1276 | |
b5c19bd7 DM |
1277 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1278 | ||
1279 | /* don't add new fake entries (via eval) to CVs that we have already | |
1280 | * finished compiling, or to undef CVs */ | |
1281 | if (CvCOMPILED(cv) || !padlist) | |
1282 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1283 | ||
1284 | { | |
0f94cb1f | 1285 | PADNAME *new_name = newPADNAMEouter(*out_name); |
9b7476d7 | 1286 | PADNAMELIST * const ocomppad_name = PL_comppad_name; |
53c1dcc0 | 1287 | PAD * const ocomppad = PL_comppad; |
9b7476d7 | 1288 | PL_comppad_name = PadlistNAMES(padlist); |
86d2498c | 1289 | PL_comppad = PadlistARRAY(padlist)[1]; |
b5c19bd7 DM |
1290 | PL_curpad = AvARRAY(PL_comppad); |
1291 | ||
3291825f | 1292 | new_offset |
e1c02f84 FC |
1293 | = pad_alloc_name(new_name, |
1294 | PadnameIsSTATE(*out_name) ? padadd_STATE : 0, | |
1295 | PadnameTYPE(*out_name), | |
1296 | PadnameOURSTASH(*out_name) | |
3291825f NC |
1297 | ); |
1298 | ||
3291825f NC |
1299 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1300 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1301 | (long)new_offset, | |
e1c02f84 FC |
1302 | (int) PadnameLEN(new_name), |
1303 | PadnamePV(new_name))); | |
1304 | PARENT_FAKELEX_FLAGS_set(new_name, *out_flags); | |
b5c19bd7 | 1305 | |
e1c02f84 FC |
1306 | PARENT_PAD_INDEX_set(new_name, 0); |
1307 | if (PadnameIsOUR(new_name)) { | |
6f207bd3 | 1308 | NOOP; /* do nothing */ |
b5c19bd7 | 1309 | } |
71f882da | 1310 | else if (CvLATE(cv)) { |
b5c19bd7 | 1311 | /* delayed creation - just note the offset within parent pad */ |
e1c02f84 | 1312 | PARENT_PAD_INDEX_set(new_name, offset); |
b5c19bd7 DM |
1313 | CvCLONE_on(cv); |
1314 | } | |
1315 | else { | |
1316 | /* immediate creation - capture outer value right now */ | |
1317 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
81df9f6f | 1318 | /* But also note the offset, as newMYSUB needs it */ |
e1c02f84 | 1319 | PARENT_PAD_INDEX_set(new_name, offset); |
b5c19bd7 | 1320 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
147e3846 | 1321 | "Pad findlex cv=0x%" UVxf " saved captured sv 0x%" UVxf " at offset %ld\n", |
b5c19bd7 | 1322 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); |
dd2155a4 | 1323 | } |
e1c02f84 FC |
1324 | *out_name = new_name; |
1325 | *out_flags = PARENT_FAKELEX_FLAGS(new_name); | |
b5c19bd7 DM |
1326 | |
1327 | PL_comppad_name = ocomppad_name; | |
1328 | PL_comppad = ocomppad; | |
4608196e | 1329 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1330 | } |
b5c19bd7 | 1331 | return new_offset; |
dd2155a4 DM |
1332 | } |
1333 | ||
fb8a9836 | 1334 | #ifdef DEBUGGING |
cc76b5cc | 1335 | |
dd2155a4 | 1336 | /* |
cc76b5cc | 1337 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1338 | |
2d7f6611 | 1339 | Get the value at offset C<po> in the current (compiling or executing) pad. |
796b6530 | 1340 | Use macro C<PAD_SV> instead of calling this function directly. |
dd2155a4 DM |
1341 | |
1342 | =cut | |
1343 | */ | |
1344 | ||
dd2155a4 DM |
1345 | SV * |
1346 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1347 | { | |
f3548bdc | 1348 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1349 | |
dd2155a4 DM |
1350 | if (!po) |
1351 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 | 1352 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
147e3846 | 1353 | "Pad 0x%" UVxf "[0x%" UVxf "] sv: %ld sv=0x%" UVxf "\n", |
f3548bdc | 1354 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1355 | ); |
1356 | return PL_curpad[po]; | |
1357 | } | |
1358 | ||
dd2155a4 | 1359 | /* |
cc76b5cc | 1360 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1361 | |
2d7f6611 | 1362 | Set the value at offset C<po> in the current (compiling or executing) pad. |
796b6530 | 1363 | Use the macro C<PAD_SETSV()> rather than calling this function directly. |
dd2155a4 DM |
1364 | |
1365 | =cut | |
1366 | */ | |
1367 | ||
dd2155a4 DM |
1368 | void |
1369 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1370 | { | |
7918f24d NC |
1371 | PERL_ARGS_ASSERT_PAD_SETSV; |
1372 | ||
f3548bdc | 1373 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1374 | |
1375 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1376 | "Pad 0x%" UVxf "[0x%" UVxf "] setsv: %ld sv=0x%" UVxf "\n", |
f3548bdc | 1377 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1378 | ); |
1379 | PL_curpad[po] = sv; | |
1380 | } | |
dd2155a4 | 1381 | |
cc76b5cc | 1382 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1383 | |
1384 | /* | |
cc76b5cc | 1385 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 | 1386 | |
e89fca5e | 1387 | Update the pad compilation state variables on entry to a new block. |
dd2155a4 DM |
1388 | |
1389 | =cut | |
1390 | */ | |
1391 | ||
dd2155a4 DM |
1392 | void |
1393 | Perl_pad_block_start(pTHX_ int full) | |
1394 | { | |
f3548bdc | 1395 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
d12be05d | 1396 | save_strlen((STRLEN *)&PL_comppad_name_floor); |
9b7476d7 | 1397 | PL_comppad_name_floor = PadnamelistMAX(PL_comppad_name); |
dd2155a4 DM |
1398 | if (full) |
1399 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1400 | if (PL_comppad_name_floor < 0) | |
1401 | PL_comppad_name_floor = 0; | |
d12be05d DM |
1402 | save_strlen((STRLEN *)&PL_min_intro_pending); |
1403 | save_strlen((STRLEN *)&PL_max_intro_pending); | |
dd2155a4 | 1404 | PL_min_intro_pending = 0; |
d12be05d DM |
1405 | save_strlen((STRLEN *)&PL_comppad_name_fill); |
1406 | save_strlen((STRLEN *)&PL_padix_floor); | |
1780e744 FC |
1407 | /* PL_padix_floor is what PL_padix is reset to at the start of each |
1408 | statement, by pad_reset(). We set it when entering a new scope | |
1409 | to keep things like this working: | |
1410 | print "$foo$bar", do { this(); that() . "foo" }; | |
1411 | We must not let "$foo$bar" and the later concatenation share the | |
1412 | same target. */ | |
dd2155a4 DM |
1413 | PL_padix_floor = PL_padix; |
1414 | PL_pad_reset_pending = FALSE; | |
1415 | } | |
1416 | ||
dd2155a4 | 1417 | /* |
25f5d540 | 1418 | =for apidoc Am|U32|intro_my |
dd2155a4 | 1419 | |
25f5d540 LM |
1420 | "Introduce" C<my> variables to visible status. This is called during parsing |
1421 | at the end of each statement to make lexical variables visible to subsequent | |
1422 | statements. | |
dd2155a4 DM |
1423 | |
1424 | =cut | |
1425 | */ | |
1426 | ||
1427 | U32 | |
1428 | Perl_intro_my(pTHX) | |
1429 | { | |
6a0435be | 1430 | PADNAME **svp; |
d12be05d | 1431 | PADOFFSET i; |
6012dc80 | 1432 | U32 seq; |
dd2155a4 | 1433 | |
f3548bdc | 1434 | ASSERT_CURPAD_ACTIVE("intro_my"); |
8635e3c2 FC |
1435 | if (PL_compiling.cop_seq) { |
1436 | seq = PL_compiling.cop_seq; | |
1437 | PL_compiling.cop_seq = 0; | |
1438 | } | |
1439 | else | |
1440 | seq = PL_cop_seqmax; | |
dd2155a4 | 1441 | if (! PL_min_intro_pending) |
8635e3c2 | 1442 | return seq; |
dd2155a4 | 1443 | |
9b7476d7 | 1444 | svp = PadnamelistARRAY(PL_comppad_name); |
dd2155a4 | 1445 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { |
6a0435be | 1446 | PADNAME * const sv = svp[i]; |
53c1dcc0 | 1447 | |
6a0435be | 1448 | if (sv && PadnameLEN(sv) && !PadnameOUTER(sv) |
0d311cdb DM |
1449 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) |
1450 | { | |
2df5bdd7 | 1451 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1452 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1453 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1454 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
6a0435be | 1455 | (long)i, PadnamePV(sv), |
809abb02 NC |
1456 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1457 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1458 | ); |
1459 | } | |
1460 | } | |
953c8b80 | 1461 | COP_SEQMAX_INC; |
dd2155a4 DM |
1462 | PL_min_intro_pending = 0; |
1463 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1464 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1465 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1466 | |
6012dc80 | 1467 | return seq; |
dd2155a4 DM |
1468 | } |
1469 | ||
1470 | /* | |
cc76b5cc | 1471 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1472 | |
1473 | Cleanup at end of scope during compilation: set the max seq number for | |
1474 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1475 | ||
1476 | =cut | |
1477 | */ | |
1478 | ||
6d5c2147 | 1479 | OP * |
dd2155a4 DM |
1480 | Perl_pad_leavemy(pTHX) |
1481 | { | |
d12be05d | 1482 | PADOFFSET off; |
6d5c2147 | 1483 | OP *o = NULL; |
9b7476d7 | 1484 | PADNAME * const * const svp = PadnamelistARRAY(PL_comppad_name); |
dd2155a4 DM |
1485 | |
1486 | PL_pad_reset_pending = FALSE; | |
1487 | ||
f3548bdc | 1488 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1489 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1490 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
01b9977c FC |
1491 | const PADNAME * const name = svp[off]; |
1492 | if (name && PadnameLEN(name) && !PadnameOUTER(name)) | |
9b387841 | 1493 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
147e3846 | 1494 | "%" PNf " never introduced", |
01b9977c | 1495 | PNfARG(name)); |
dd2155a4 DM |
1496 | } |
1497 | } | |
1498 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
9b7476d7 FC |
1499 | for (off = PadnamelistMAX(PL_comppad_name); |
1500 | off > PL_comppad_name_fill; off--) { | |
01b9977c FC |
1501 | PADNAME * const sv = svp[off]; |
1502 | if (sv && PadnameLEN(sv) && !PadnameOUTER(sv) | |
2df5bdd7 DM |
1503 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) |
1504 | { | |
809abb02 | 1505 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1506 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1507 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
01b9977c | 1508 | (long)off, PadnamePV(sv), |
809abb02 NC |
1509 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1510 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 | 1511 | ); |
6d5c2147 FC |
1512 | if (!PadnameIsSTATE(sv) && !PadnameIsOUR(sv) |
1513 | && *PadnamePV(sv) == '&' && PadnameLEN(sv) > 1) { | |
1514 | OP *kid = newOP(OP_INTROCV, 0); | |
1515 | kid->op_targ = off; | |
1516 | o = op_prepend_elem(OP_LINESEQ, kid, o); | |
1517 | } | |
dd2155a4 DM |
1518 | } |
1519 | } | |
953c8b80 | 1520 | COP_SEQMAX_INC; |
dd2155a4 DM |
1521 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1522 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
6d5c2147 | 1523 | return o; |
dd2155a4 DM |
1524 | } |
1525 | ||
dd2155a4 | 1526 | /* |
cc76b5cc | 1527 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 | 1528 | |
796b6530 | 1529 | Abandon the tmp in the current pad at offset C<po> and replace with a |
dd2155a4 DM |
1530 | new one. |
1531 | ||
1532 | =cut | |
1533 | */ | |
1534 | ||
1535 | void | |
1536 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1537 | { | |
f3548bdc | 1538 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1539 | if (!PL_curpad) |
1540 | return; | |
1541 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1542 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1543 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1544 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1545 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1546 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1547 | |
1548 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1549 | "Pad 0x%" UVxf "[0x%" UVxf "] swipe: %ld\n", |
dd2155a4 DM |
1550 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); |
1551 | ||
dd2155a4 DM |
1552 | if (refadjust) |
1553 | SvREFCNT_dec(PL_curpad[po]); | |
1554 | ||
9ad9869c DM |
1555 | |
1556 | /* if pad tmps aren't shared between ops, then there's no need to | |
1557 | * create a new tmp when an existing op is freed */ | |
53de1311 | 1558 | #ifdef USE_PAD_RESET |
561b68a9 | 1559 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1560 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c | 1561 | #else |
ce0d59fd | 1562 | PL_curpad[po] = NULL; |
97bf4a8d | 1563 | #endif |
325e1816 | 1564 | if (PadnamelistMAX(PL_comppad_name) != -1 |
4891fdfa | 1565 | && (PADOFFSET)PadnamelistMAX(PL_comppad_name) >= po) { |
ce0d59fd FC |
1566 | if (PadnamelistARRAY(PL_comppad_name)[po]) { |
1567 | assert(!PadnameLEN(PadnamelistARRAY(PL_comppad_name)[po])); | |
1568 | } | |
0f94cb1f | 1569 | PadnamelistARRAY(PL_comppad_name)[po] = &PL_padname_undef; |
325e1816 | 1570 | } |
b54c5e14 FC |
1571 | /* Use PL_constpadix here, not PL_padix. The latter may have been |
1572 | reset by pad_reset. We don’t want pad_alloc to have to scan the | |
1573 | whole pad when allocating a constant. */ | |
d12be05d | 1574 | if (po < PL_constpadix) |
b54c5e14 | 1575 | PL_constpadix = po - 1; |
dd2155a4 DM |
1576 | } |
1577 | ||
dd2155a4 | 1578 | /* |
cc76b5cc | 1579 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1580 | |
1581 | Mark all the current temporaries for reuse | |
1582 | ||
1583 | =cut | |
1584 | */ | |
1585 | ||
1780e744 FC |
1586 | /* pad_reset() causes pad temp TARGs (operator targets) to be shared |
1587 | * between OPs from different statements. During compilation, at the start | |
1588 | * of each statement pad_reset resets PL_padix back to its previous value. | |
1589 | * When allocating a target, pad_alloc begins its scan through the pad at | |
1590 | * PL_padix+1. */ | |
1f676739 | 1591 | static void |
82af08ae | 1592 | S_pad_reset(pTHX) |
dd2155a4 | 1593 | { |
53de1311 | 1594 | #ifdef USE_PAD_RESET |
dd2155a4 | 1595 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1596 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1597 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1598 | |
1599 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1600 | "Pad 0x%" UVxf "[0x%" UVxf "] reset: padix %ld -> %ld", |
dd2155a4 DM |
1601 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), |
1602 | (long)PL_padix, (long)PL_padix_floor | |
1603 | ) | |
1604 | ); | |
1605 | ||
284167a5 | 1606 | if (!TAINTING_get) { /* Can't mix tainted and non-tainted temporaries. */ |
dd2155a4 DM |
1607 | PL_padix = PL_padix_floor; |
1608 | } | |
1609 | #endif | |
1610 | PL_pad_reset_pending = FALSE; | |
1611 | } | |
1612 | ||
dd2155a4 | 1613 | /* |
cc76b5cc Z |
1614 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1615 | ||
1616 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1617 | Jobs performed here are: remove most stuff from the pads of anonsub | |
796b6530 | 1618 | prototypes; give it a C<@_>; mark temporaries as such. C<type> indicates |
cc76b5cc | 1619 | the kind of subroutine: |
dd2155a4 | 1620 | |
cc76b5cc Z |
1621 | padtidy_SUB ordinary subroutine |
1622 | padtidy_SUBCLONE prototype for lexical closure | |
1623 | padtidy_FORMAT format | |
dd2155a4 DM |
1624 | |
1625 | =cut | |
1626 | */ | |
1627 | ||
dd2155a4 DM |
1628 | void |
1629 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1630 | { | |
27da23d5 | 1631 | dVAR; |
dd2155a4 | 1632 | |
f3548bdc | 1633 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 | 1634 | |
db21619c DM |
1635 | /* If this CV has had any 'eval-capable' ops planted in it: |
1636 | * i.e. it contains any of: | |
1637 | * | |
1638 | * * eval '...', | |
1639 | * * //ee, | |
1640 | * * use re 'eval'; /$var/ | |
1641 | * * /(?{..})/), | |
1642 | * | |
1643 | * Then any anon prototypes in the chain of CVs should be marked as | |
1644 | * cloneable, so that for example the eval's CV in | |
1645 | * | |
1646 | * sub { eval '$x' } | |
1647 | * | |
1648 | * gets the right CvOUTSIDE. If running with -d, *any* sub may | |
1649 | * potentially have an eval executed within it. | |
b5c19bd7 DM |
1650 | */ |
1651 | ||
1652 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1653 | const CV *cv; |
b5c19bd7 DM |
1654 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1655 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1656 | break; /* no need to mark already-compiled code */ | |
1657 | if (CvANON(cv)) { | |
1658 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1659 | "Pad clone on cv=0x%" UVxf "\n", PTR2UV(cv))); |
b5c19bd7 DM |
1660 | CvCLONE_on(cv); |
1661 | } | |
00cc8743 | 1662 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1663 | } |
1664 | } | |
1665 | ||
eb8137a9 | 1666 | /* extend namepad to match curpad */ |
9b7476d7 FC |
1667 | if (PadnamelistMAX(PL_comppad_name) < AvFILLp(PL_comppad)) |
1668 | padnamelist_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); | |
dd2155a4 DM |
1669 | |
1670 | if (type == padtidy_SUBCLONE) { | |
9b7476d7 | 1671 | PADNAME ** const namep = PadnamelistARRAY(PL_comppad_name); |
504618e9 | 1672 | PADOFFSET ix; |
b5c19bd7 | 1673 | |
dd2155a4 | 1674 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
dbfcda05 FC |
1675 | PADNAME *namesv; |
1676 | if (!namep[ix]) namep[ix] = &PL_padname_undef; | |
dd2155a4 | 1677 | |
dd2155a4 DM |
1678 | /* |
1679 | * The only things that a clonable function needs in its | |
3a6ce63a | 1680 | * pad are anonymous subs, constants and GVs. |
dd2155a4 DM |
1681 | * The rest are created anew during cloning. |
1682 | */ | |
b561f196 | 1683 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix])) |
3a6ce63a | 1684 | continue; |
ce0d59fd FC |
1685 | namesv = namep[ix]; |
1686 | if (!(PadnamePV(namesv) && | |
dbfcda05 | 1687 | (!PadnameLEN(namesv) || *PadnamePV(namesv) == '&'))) |
dd2155a4 DM |
1688 | { |
1689 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1690 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1691 | } |
1692 | } | |
1693 | } | |
1694 | else if (type == padtidy_SUB) { | |
53c1dcc0 | 1695 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1696 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1697 | AvREIFY_only(av); |
dd2155a4 DM |
1698 | } |
1699 | ||
4cee4ca8 | 1700 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
9b7476d7 | 1701 | PADNAME ** const namep = PadnamelistARRAY(PL_comppad_name); |
504618e9 | 1702 | PADOFFSET ix; |
dd2155a4 | 1703 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
0f94cb1f | 1704 | if (!namep[ix]) namep[ix] = &PL_padname_undef; |
2347c8c0 | 1705 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix])) |
dd2155a4 | 1706 | continue; |
0f94cb1f | 1707 | if (SvPADMY(PL_curpad[ix]) && !PadnameOUTER(namep[ix])) { |
adf8f095 NC |
1708 | /* This is a work around for how the current implementation of |
1709 | ?{ } blocks in regexps interacts with lexicals. | |
1710 | ||
1711 | One of our lexicals. | |
1712 | Can't do this on all lexicals, otherwise sub baz() won't | |
1713 | compile in | |
1714 | ||
1715 | my $foo; | |
1716 | ||
1717 | sub bar { ++$foo; } | |
1718 | ||
1719 | sub baz { ++$foo; } | |
1720 | ||
1721 | because completion of compiling &bar calling pad_tidy() | |
1722 | would cause (top level) $foo to be marked as stale, and | |
1723 | "no longer available". */ | |
1724 | SvPADSTALE_on(PL_curpad[ix]); | |
1725 | } | |
dd2155a4 DM |
1726 | } |
1727 | } | |
f3548bdc | 1728 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1729 | } |
1730 | ||
dd2155a4 | 1731 | /* |
cc76b5cc | 1732 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1733 | |
8627550a | 1734 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1735 | |
1736 | =cut | |
1737 | */ | |
1738 | ||
dd2155a4 DM |
1739 | void |
1740 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1741 | { | |
53de1311 | 1742 | #ifndef USE_PAD_RESET |
ad9e6ae1 | 1743 | SV *sv; |
ff06c6b2 | 1744 | #endif |
f3548bdc | 1745 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1746 | if (!PL_curpad) |
1747 | return; | |
1748 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1749 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1750 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1751 | if (!po) |
1752 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1753 | ||
1754 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
147e3846 | 1755 | "Pad 0x%" UVxf "[0x%" UVxf "] free: %ld\n", |
dd2155a4 DM |
1756 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) |
1757 | ); | |
1758 | ||
53de1311 | 1759 | #ifndef USE_PAD_RESET |
ad9e6ae1 DM |
1760 | sv = PL_curpad[po]; |
1761 | if (sv && sv != &PL_sv_undef && !SvPADMY(sv)) | |
1762 | SvFLAGS(sv) &= ~SVs_PADTMP; | |
1763 | ||
d12be05d | 1764 | if (po < PL_padix) |
dd2155a4 | 1765 | PL_padix = po - 1; |
53d3c048 | 1766 | #endif |
dd2155a4 DM |
1767 | } |
1768 | ||
dd2155a4 | 1769 | /* |
cc76b5cc | 1770 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1771 | |
1772 | Dump the contents of a padlist | |
1773 | ||
1774 | =cut | |
1775 | */ | |
1776 | ||
1777 | void | |
1778 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1779 | { | |
9b7476d7 | 1780 | const PADNAMELIST *pad_name; |
e1ec3a88 | 1781 | const AV *pad; |
01326933 | 1782 | PADNAME **pname; |
dd2155a4 | 1783 | SV **ppad; |
d12be05d | 1784 | PADOFFSET ix; |
dd2155a4 | 1785 | |
7918f24d NC |
1786 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1787 | ||
dd2155a4 DM |
1788 | if (!padlist) { |
1789 | return; | |
1790 | } | |
9b7476d7 | 1791 | pad_name = PadlistNAMES(padlist); |
86d2498c | 1792 | pad = PadlistARRAY(padlist)[1]; |
9b7476d7 | 1793 | pname = PadnamelistARRAY(pad_name); |
dd2155a4 DM |
1794 | ppad = AvARRAY(pad); |
1795 | Perl_dump_indent(aTHX_ level, file, | |
147e3846 | 1796 | "PADNAME = 0x%" UVxf "(0x%" UVxf ") PAD = 0x%" UVxf "(0x%" UVxf ")\n", |
dd2155a4 DM |
1797 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) |
1798 | ); | |
1799 | ||
9b7476d7 | 1800 | for (ix = 1; ix <= PadnamelistMAX(pad_name); ix++) { |
01326933 | 1801 | const PADNAME *namesv = pname[ix]; |
325e1816 | 1802 | if (namesv && !PadnameLEN(namesv)) { |
a0714e2c | 1803 | namesv = NULL; |
dd2155a4 DM |
1804 | } |
1805 | if (namesv) { | |
01326933 | 1806 | if (PadnameOUTER(namesv)) |
ee6cee0c | 1807 | Perl_dump_indent(aTHX_ level+1, file, |
147e3846 | 1808 | "%2d. 0x%" UVxf "<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1809 | (int) ix, |
1810 | PTR2UV(ppad[ix]), | |
1811 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
01326933 | 1812 | PadnamePV(namesv), |
809abb02 NC |
1813 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1814 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1815 | |
ee6cee0c DM |
1816 | ); |
1817 | else | |
1818 | Perl_dump_indent(aTHX_ level+1, file, | |
147e3846 | 1819 | "%2d. 0x%" UVxf "<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1820 | (int) ix, |
1821 | PTR2UV(ppad[ix]), | |
1822 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1823 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1824 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
01326933 | 1825 | PadnamePV(namesv) |
ee6cee0c | 1826 | ); |
dd2155a4 DM |
1827 | } |
1828 | else if (full) { | |
1829 | Perl_dump_indent(aTHX_ level+1, file, | |
147e3846 | 1830 | "%2d. 0x%" UVxf "<%lu>\n", |
dd2155a4 DM |
1831 | (int) ix, |
1832 | PTR2UV(ppad[ix]), | |
1833 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1834 | ); | |
1835 | } | |
1836 | } | |
1837 | } | |
1838 | ||
cc76b5cc | 1839 | #ifdef DEBUGGING |
dd2155a4 DM |
1840 | |
1841 | /* | |
cc76b5cc | 1842 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1843 | |
1844 | dump the contents of a CV | |
1845 | ||
1846 | =cut | |
1847 | */ | |
1848 | ||
dd2155a4 | 1849 | STATIC void |
e1ec3a88 | 1850 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1851 | { |
53c1dcc0 | 1852 | const CV * const outside = CvOUTSIDE(cv); |
b70d5558 | 1853 | PADLIST* const padlist = CvPADLIST(cv); |
dd2155a4 | 1854 | |
7918f24d NC |
1855 | PERL_ARGS_ASSERT_CV_DUMP; |
1856 | ||
dd2155a4 | 1857 | PerlIO_printf(Perl_debug_log, |
147e3846 | 1858 | " %s: CV=0x%" UVxf " (%s), OUTSIDE=0x%" UVxf " (%s)\n", |
dd2155a4 DM |
1859 | title, |
1860 | PTR2UV(cv), | |
1861 | (CvANON(cv) ? "ANON" | |
71f882da | 1862 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1863 | : (cv == PL_main_cv) ? "MAIN" |
1864 | : CvUNIQUE(cv) ? "UNIQUE" | |
1865 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1866 | PTR2UV(outside), | |
1867 | (!outside ? "null" | |
1868 | : CvANON(outside) ? "ANON" | |
1869 | : (outside == PL_main_cv) ? "MAIN" | |
1870 | : CvUNIQUE(outside) ? "UNIQUE" | |
1871 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1872 | ||
1873 | PerlIO_printf(Perl_debug_log, | |
147e3846 | 1874 | " PADLIST = 0x%" UVxf "\n", PTR2UV(padlist)); |
dd2155a4 DM |
1875 | do_dump_pad(1, Perl_debug_log, padlist, 1); |
1876 | } | |
dd2155a4 | 1877 | |
cc76b5cc | 1878 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1879 | |
1880 | /* | |
cc76b5cc | 1881 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1882 | |
2d7f6611 | 1883 | Clone a CV, making a lexical closure. C<proto> supplies the prototype |
cc76b5cc Z |
1884 | of the function: its code, pad structure, and other attributes. |
1885 | The prototype is combined with a capture of outer lexicals to which the | |
1886 | code refers, which are taken from the currently-executing instance of | |
1887 | the immediately surrounding code. | |
dd2155a4 DM |
1888 | |
1889 | =cut | |
1890 | */ | |
1891 | ||
e0c6a6b8 | 1892 | static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside, HV *cloned); |
e10681aa | 1893 | |
21195f4d | 1894 | static CV * |
e0c6a6b8 FC |
1895 | S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside, HV *cloned, |
1896 | bool newcv) | |
dd2155a4 | 1897 | { |
d12be05d | 1898 | PADOFFSET ix; |
b70d5558 | 1899 | PADLIST* const protopadlist = CvPADLIST(proto); |
9b7476d7 | 1900 | PADNAMELIST *const protopad_name = PadlistNAMES(protopadlist); |
86d2498c | 1901 | const PAD *const protopad = PadlistARRAY(protopadlist)[1]; |
39899bf0 | 1902 | PADNAME** const pname = PadnamelistARRAY(protopad_name); |
53c1dcc0 | 1903 | SV** const ppad = AvARRAY(protopad); |
d12be05d DM |
1904 | const PADOFFSET fname = PadnamelistMAX(protopad_name); |
1905 | const PADOFFSET fpad = AvFILLp(protopad); | |
b5c19bd7 | 1906 | SV** outpad; |
71f882da | 1907 | long depth; |
e0c6a6b8 FC |
1908 | U32 subclones = 0; |
1909 | bool trouble = FALSE; | |
7918f24d | 1910 | |
dd2155a4 DM |
1911 | assert(!CvUNIQUE(proto)); |
1912 | ||
1b5aaca6 FC |
1913 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
1914 | * reliable. The currently-running sub is always the one we need to | |
1915 | * close over. | |
8d88fe29 FC |
1916 | * For my subs, the currently-running sub may not be the one we want. |
1917 | * We have to check whether it is a clone of CvOUTSIDE. | |
1b5aaca6 FC |
1918 | * Note that in general for formats, CvOUTSIDE != find_runcv. |
1919 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 1920 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 1921 | */ |
71f882da | 1922 | |
e07561e6 | 1923 | if (!outside) { |
ebfebee4 | 1924 | if (CvWEAKOUTSIDE(proto)) |
71f882da | 1925 | outside = find_runcv(NULL); |
e07561e6 | 1926 | else { |
af41786f | 1927 | outside = CvOUTSIDE(proto); |
db4cf31d FC |
1928 | if ((CvCLONE(outside) && ! CvCLONED(outside)) |
1929 | || !CvPADLIST(outside) | |
b4db5868 | 1930 | || CvPADLIST(outside)->xpadl_id != protopadlist->xpadl_outid) { |
db4cf31d | 1931 | outside = find_runcv_where( |
a56015b9 | 1932 | FIND_RUNCV_padid_eq, PTR2IV(protopadlist->xpadl_outid), NULL |
70794f7b | 1933 | ); |
db4cf31d | 1934 | /* outside could be null */ |
5dff782d | 1935 | } |
e07561e6 | 1936 | } |
5dff782d | 1937 | } |
db4cf31d | 1938 | depth = outside ? CvDEPTH(outside) : 0; |
71f882da DM |
1939 | if (!depth) |
1940 | depth = 1; | |
b5c19bd7 | 1941 | |
dd2155a4 DM |
1942 | ENTER; |
1943 | SAVESPTR(PL_compcv); | |
e07561e6 | 1944 | PL_compcv = cv; |
5fab0186 | 1945 | if (newcv) SAVEFREESV(cv); /* in case of fatal warnings */ |
dd2155a4 | 1946 | |
a0d2bbd5 FC |
1947 | if (CvHASEVAL(cv)) |
1948 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
dd2155a4 | 1949 | |
cbacc9aa | 1950 | SAVESPTR(PL_comppad_name); |
9ef8d569 | 1951 | PL_comppad_name = protopad_name; |
eacbb379 | 1952 | CvPADLIST_set(cv, pad_new(padnew_CLONE|padnew_SAVE)); |
b4db5868 | 1953 | CvPADLIST(cv)->xpadl_id = protopadlist->xpadl_id; |
dd2155a4 | 1954 | |
b5c19bd7 | 1955 | av_fill(PL_comppad, fpad); |
dd2155a4 | 1956 | |
dd2155a4 DM |
1957 | PL_curpad = AvARRAY(PL_comppad); |
1958 | ||
db4cf31d | 1959 | outpad = outside && CvPADLIST(outside) |
86d2498c | 1960 | ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth]) |
f2ead8b8 | 1961 | : NULL; |
b4db5868 | 1962 | if (outpad) CvPADLIST(cv)->xpadl_outid = CvPADLIST(outside)->xpadl_id; |
b5c19bd7 | 1963 | |
dd2155a4 | 1964 | for (ix = fpad; ix > 0; ix--) { |
39899bf0 | 1965 | PADNAME* const namesv = (ix <= fname) ? pname[ix] : NULL; |
a0714e2c | 1966 | SV *sv = NULL; |
325e1816 | 1967 | if (namesv && PadnameLEN(namesv)) { /* lexical */ |
f2047bf1 FC |
1968 | if (PadnameIsOUR(namesv)) { /* or maybe not so lexical */ |
1969 | NOOP; | |
1970 | } | |
1971 | else { | |
39899bf0 | 1972 | if (PadnameOUTER(namesv)) { /* lexical from outside? */ |
5aec98df FC |
1973 | /* formats may have an inactive, or even undefined, parent; |
1974 | but state vars are always available. */ | |
f2ead8b8 | 1975 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe | 1976 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
db4cf31d | 1977 | && (!outside || !CvDEPTH(outside))) ) { |
445f13ff | 1978 | S_unavailable(aTHX_ namesv); |
a0714e2c | 1979 | sv = NULL; |
71f882da | 1980 | } |
33894c1a | 1981 | else |
f84c484e | 1982 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1983 | } |
71f882da | 1984 | if (!sv) { |
39899bf0 | 1985 | const char sigil = PadnamePV(namesv)[0]; |
e1ec3a88 | 1986 | if (sigil == '&') |
e07561e6 FC |
1987 | /* If there are state subs, we need to clone them, too. |
1988 | But they may need to close over variables we have | |
1989 | not cloned yet. So we will have to do a second | |
1990 | pass. Furthermore, there may be state subs clos- | |
1991 | ing over other state subs’ entries, so we have | |
1992 | to put a stub here and then clone into it on the | |
1993 | second pass. */ | |
6d5c2147 FC |
1994 | if (SvPAD_STATE(namesv) && !CvCLONED(ppad[ix])) { |
1995 | assert(SvTYPE(ppad[ix]) == SVt_PVCV); | |
e0c6a6b8 FC |
1996 | subclones ++; |
1997 | if (CvOUTSIDE(ppad[ix]) != proto) | |
1998 | trouble = TRUE; | |
6d5c2147 | 1999 | sv = newSV_type(SVt_PVCV); |
f3feca7a | 2000 | CvLEXICAL_on(sv); |
6d5c2147 FC |
2001 | } |
2002 | else if (PadnameLEN(namesv)>1 && !PadnameIsOUR(namesv)) | |
2003 | { | |
2004 | /* my sub */ | |
81df9f6f | 2005 | /* Just provide a stub, but name it. It will be |
7600a9e5 | 2006 | upgraded to the real thing on scope entry. */ |
f7cf2d13 | 2007 | dVAR; |
e1588866 | 2008 | U32 hash; |
39899bf0 FC |
2009 | PERL_HASH(hash, PadnamePV(namesv)+1, |
2010 | PadnameLEN(namesv) - 1); | |
81df9f6f | 2011 | sv = newSV_type(SVt_PVCV); |
cf748c3c FC |
2012 | CvNAME_HEK_set( |
2013 | sv, | |
39899bf0 FC |
2014 | share_hek(PadnamePV(namesv)+1, |
2015 | 1 - PadnameLEN(namesv), | |
e1588866 | 2016 | hash) |
cf748c3c | 2017 | ); |
f3feca7a | 2018 | CvLEXICAL_on(sv); |
6d5c2147 FC |
2019 | } |
2020 | else sv = SvREFCNT_inc(ppad[ix]); | |
e1ec3a88 | 2021 | else if (sigil == '@') |
ad64d0ec | 2022 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2023 | else if (sigil == '%') |
ad64d0ec | 2024 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2025 | else |
561b68a9 | 2026 | sv = newSV(0); |
0d3b281c | 2027 | /* reset the 'assign only once' flag on each state var */ |
e07561e6 | 2028 | if (sigil != '&' && SvPAD_STATE(namesv)) |
0d3b281c | 2029 | SvPADSTALE_on(sv); |
dd2155a4 | 2030 | } |
f2047bf1 | 2031 | } |
dd2155a4 | 2032 | } |
4c894bf7 | 2033 | else if (namesv && PadnamePV(namesv)) { |
f84c484e | 2034 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2035 | } |
2036 | else { | |
561b68a9 | 2037 | sv = newSV(0); |
dd2155a4 | 2038 | SvPADTMP_on(sv); |
dd2155a4 | 2039 | } |
71f882da | 2040 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2041 | } |
2042 | ||
e07561e6 | 2043 | if (subclones) |
e0c6a6b8 FC |
2044 | { |
2045 | if (trouble || cloned) { | |
2046 | /* Uh-oh, we have trouble! At least one of the state subs here | |
2047 | has its CvOUTSIDE pointer pointing somewhere unexpected. It | |
2048 | could be pointing to another state protosub that we are | |
2049 | about to clone. So we have to track which sub clones come | |
2050 | from which protosubs. If the CvOUTSIDE pointer for a parti- | |
2051 | cular sub points to something we have not cloned yet, we | |
2052 | delay cloning it. We must loop through the pad entries, | |
2053 | until we get a full pass with no cloning. If any uncloned | |
2054 | subs remain (probably nested inside anonymous or ‘my’ subs), | |
2055 | then they get cloned in a final pass. | |
2056 | */ | |
2057 | bool cloned_in_this_pass; | |
2058 | if (!cloned) | |
2059 | cloned = (HV *)sv_2mortal((SV *)newHV()); | |
2060 | do { | |
2061 | cloned_in_this_pass = FALSE; | |
2062 | for (ix = fpad; ix > 0; ix--) { | |
2063 | PADNAME * const name = | |
2064 | (ix <= fname) ? pname[ix] : NULL; | |
2065 | if (name && name != &PL_padname_undef | |
2066 | && !PadnameOUTER(name) && PadnamePV(name)[0] == '&' | |
2067 | && PadnameIsSTATE(name) && !CvCLONED(PL_curpad[ix])) | |
2068 | { | |
2069 | CV * const protokey = CvOUTSIDE(ppad[ix]); | |
2070 | CV ** const cvp = protokey == proto | |
2071 | ? &cv | |
2072 | : (CV **)hv_fetch(cloned, (char *)&protokey, | |
2073 | sizeof(CV *), 0); | |
2074 | if (cvp && *cvp) { | |
2075 | S_cv_clone(aTHX_ (CV *)ppad[ix], | |
2076 | (CV *)PL_curpad[ix], | |
2077 | *cvp, cloned); | |
b53eee5d | 2078 | (void)hv_store(cloned, (char *)&ppad[ix], |
e0c6a6b8 FC |
2079 | sizeof(CV *), |
2080 | SvREFCNT_inc_simple_NN(PL_curpad[ix]), | |
2081 | 0); | |
2082 | subclones--; | |
2083 | cloned_in_this_pass = TRUE; | |
2084 | } | |
2085 | } | |
2086 | } | |
2087 | } while (cloned_in_this_pass); | |
2088 | if (subclones) | |
2089 | for (ix = fpad; ix > 0; ix--) { | |
2090 | PADNAME * const name = | |
2091 | (ix <= fname) ? pname[ix] : NULL; | |
2092 | if (name && name != &PL_padname_undef | |
2093 | && !PadnameOUTER(name) && PadnamePV(name)[0] == '&' | |
2094 | && PadnameIsSTATE(name) && !CvCLONED(PL_curpad[ix])) | |
2095 | S_cv_clone(aTHX_ (CV *)ppad[ix], | |
2096 | (CV *)PL_curpad[ix], | |
2097 | CvOUTSIDE(ppad[ix]), cloned); | |
2098 | } | |
2099 | } | |
2100 | else for (ix = fpad; ix > 0; ix--) { | |
39899bf0 FC |
2101 | PADNAME * const name = (ix <= fname) ? pname[ix] : NULL; |
2102 | if (name && name != &PL_padname_undef && !PadnameOUTER(name) | |
2103 | && PadnamePV(name)[0] == '&' && PadnameIsSTATE(name)) | |
e0c6a6b8 FC |
2104 | S_cv_clone(aTHX_ (CV *)ppad[ix], (CV *)PL_curpad[ix], cv, |
2105 | NULL); | |
e07561e6 | 2106 | } |
e0c6a6b8 | 2107 | } |
e07561e6 | 2108 | |
5fab0186 | 2109 | if (newcv) SvREFCNT_inc_simple_void_NN(cv); |
e10681aa | 2110 | LEAVE; |
21195f4d | 2111 | |
1567c65a FC |
2112 | if (CvCONST(cv)) { |
2113 | /* Constant sub () { $x } closing over $x: | |
2114 | * The prototype was marked as a candiate for const-ization, | |
2115 | * so try to grab the current const value, and if successful, | |
2116 | * turn into a const sub: | |
2117 | */ | |
d8d6ddf8 FC |
2118 | SV* const_sv; |
2119 | OP *o = CvSTART(cv); | |
1567c65a | 2120 | assert(newcv); |
d8d6ddf8 FC |
2121 | for (; o; o = o->op_next) |
2122 | if (o->op_type == OP_PADSV) | |
2123 | break; | |
2124 | ASSUME(o->op_type == OP_PADSV); | |
2125 | const_sv = PAD_BASE_SV(CvPADLIST(cv), o->op_targ); | |
2126 | /* the candidate should have 1 ref from this pad and 1 ref | |
2127 | * from the parent */ | |
2128 | if (const_sv && SvREFCNT(const_sv) == 2) { | |
1567c65a | 2129 | const bool was_method = cBOOL(CvMETHOD(cv)); |
04472a84 | 2130 | bool copied = FALSE; |
d8d6ddf8 FC |
2131 | if (outside) { |
2132 | PADNAME * const pn = | |
2133 | PadlistNAMESARRAY(CvPADLIST(outside)) | |
2134 | [PARENT_PAD_INDEX(PadlistNAMESARRAY( | |
2135 | CvPADLIST(cv))[o->op_targ])]; | |
2136 | assert(PadnameOUTER(PadlistNAMESARRAY(CvPADLIST(cv)) | |
2137 | [o->op_targ])); | |
2138 | if (PadnameLVALUE(pn)) { | |
2139 | /* We have a lexical that is potentially modifiable | |
2140 | elsewhere, so making a constant will break clo- | |
2141 | sure behaviour. If this is a ‘simple lexical | |
2142 | op tree’, i.e., sub(){$x}, emit a deprecation | |
2143 | warning, but continue to exhibit the old behav- | |
2144 | iour of making it a constant based on the ref- | |
2145 | count of the candidate variable. | |
2146 | ||
2147 | A simple lexical op tree looks like this: | |
2148 | ||
2149 | leavesub | |
2150 | lineseq | |
2151 | nextstate | |
2152 | padsv | |
2153 | */ | |
e6dae479 | 2154 | if (OpSIBLING( |
d8d6ddf8 FC |
2155 | cUNOPx(cUNOPx(CvROOT(cv))->op_first)->op_first |
2156 | ) == o | |
e6dae479 | 2157 | && !OpSIBLING(o)) |
04472a84 | 2158 | { |
d8d6ddf8 FC |
2159 | Perl_ck_warner_d(aTHX_ |
2160 | packWARN(WARN_DEPRECATED), | |
2161 | "Constants from lexical " | |
2162 | "variables potentially " | |
2163 | "modified elsewhere are " | |
9840d1d6 A |
2164 | "deprecated. This will not " |
2165 | "be allowed in Perl 5.32"); | |
04472a84 FC |
2166 | /* We *copy* the lexical variable, and donate the |
2167 | copy to newCONSTSUB. Yes, this is ugly, and | |
2168 | should be killed. We need to do this for the | |
2169 | time being, however, because turning on SvPADTMP | |
2170 | on a lexical will have observable effects | |
2171 | elsewhere. */ | |
2172 | const_sv = newSVsv(const_sv); | |
2173 | copied = TRUE; | |
2174 | } | |
d8d6ddf8 FC |
2175 | else |
2176 | goto constoff; | |
2177 | } | |
2178 | } | |
04472a84 FC |
2179 | if (!copied) |
2180 | SvREFCNT_inc_simple_void_NN(const_sv); | |
2181 | /* If the lexical is not used elsewhere, it is safe to turn on | |
2182 | SvPADTMP, since it is only when it is used in lvalue con- | |
2183 | text that the difference is observable. */ | |
6dfba0aa | 2184 | SvREADONLY_on(const_sv); |
d8d6ddf8 | 2185 | SvPADTMP_on(const_sv); |
1567c65a | 2186 | SvREFCNT_dec_NN(cv); |
1567c65a FC |
2187 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
2188 | if (was_method) | |
2189 | CvMETHOD_on(cv); | |
2190 | } | |
2191 | else { | |
d8d6ddf8 | 2192 | constoff: |
1567c65a FC |
2193 | CvCONST_off(cv); |
2194 | } | |
2195 | } | |
2196 | ||
21195f4d | 2197 | return cv; |
e10681aa FC |
2198 | } |
2199 | ||
2200 | static CV * | |
e0c6a6b8 | 2201 | S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside, HV *cloned) |
e10681aa | 2202 | { |
20b7effb | 2203 | #ifdef USE_ITHREADS |
c04ef36e | 2204 | dVAR; |
20b7effb | 2205 | #endif |
5fab0186 | 2206 | const bool newcv = !cv; |
c04ef36e | 2207 | |
e10681aa FC |
2208 | assert(!CvUNIQUE(proto)); |
2209 | ||
2210 | if (!cv) cv = MUTABLE_CV(newSV_type(SvTYPE(proto))); | |
2211 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC | |
2212 | |CVf_SLABBED); | |
2213 | CvCLONED_on(cv); | |
2214 | ||
2215 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) | |
2216 | : CvFILE(proto); | |
2217 | if (CvNAMED(proto)) | |
2e800d79 | 2218 | CvNAME_HEK_set(cv, share_hek_hek(CvNAME_HEK(proto))); |
e10681aa FC |
2219 | else CvGV_set(cv,CvGV(proto)); |
2220 | CvSTASH_set(cv, CvSTASH(proto)); | |
2221 | OP_REFCNT_LOCK; | |
2222 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
2223 | OP_REFCNT_UNLOCK; | |
2224 | CvSTART(cv) = CvSTART(proto); | |
2225 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
2226 | ||
fdf416b6 | 2227 | if (SvPOK(proto)) { |
e10681aa | 2228 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
fdf416b6 BF |
2229 | if (SvUTF8(proto)) |
2230 | SvUTF8_on(MUTABLE_SV(cv)); | |
2231 | } | |
e10681aa FC |
2232 | if (SvMAGIC(proto)) |
2233 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
2234 | ||
21195f4d | 2235 | if (CvPADLIST(proto)) |
e0c6a6b8 | 2236 | cv = S_cv_clone_pad(aTHX_ proto, cv, outside, cloned, newcv); |
e10681aa | 2237 | |
dd2155a4 DM |
2238 | DEBUG_Xv( |
2239 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
e10681aa | 2240 | if (CvOUTSIDE(cv)) cv_dump(CvOUTSIDE(cv), "Outside"); |
dd2155a4 DM |
2241 | cv_dump(proto, "Proto"); |
2242 | cv_dump(cv, "To"); | |
2243 | ); | |
2244 | ||
dd2155a4 DM |
2245 | return cv; |
2246 | } | |
2247 | ||
e07561e6 FC |
2248 | CV * |
2249 | Perl_cv_clone(pTHX_ CV *proto) | |
2250 | { | |
2251 | PERL_ARGS_ASSERT_CV_CLONE; | |
2252 | ||
fead5351 | 2253 | if (!CvPADLIST(proto)) Perl_croak(aTHX_ "panic: no pad in cv_clone"); |
e0c6a6b8 | 2254 | return S_cv_clone(aTHX_ proto, NULL, NULL, NULL); |
e07561e6 FC |
2255 | } |
2256 | ||
6d5c2147 FC |
2257 | /* Called only by pp_clonecv */ |
2258 | CV * | |
2259 | Perl_cv_clone_into(pTHX_ CV *proto, CV *target) | |
2260 | { | |
2261 | PERL_ARGS_ASSERT_CV_CLONE_INTO; | |
2262 | cv_undef(target); | |
e0c6a6b8 | 2263 | return S_cv_clone(aTHX_ proto, target, NULL, NULL); |
6d5c2147 FC |
2264 | } |
2265 | ||
fb094047 FC |
2266 | /* |
2267 | =for apidoc cv_name | |
2268 | ||
2269 | Returns an SV containing the name of the CV, mainly for use in error | |
2270 | reporting. The CV may actually be a GV instead, in which case the returned | |
7a275a2e FC |
2271 | SV holds the GV's name. Anything other than a GV or CV is treated as a |
2272 | string already holding the sub name, but this could change in the future. | |
fb094047 FC |
2273 | |
2274 | An SV may be passed as a second argument. If so, the name will be assigned | |
2275 | to it and it will be returned. Otherwise the returned SV will be a new | |
2276 | mortal. | |
2277 | ||
c5608a1f | 2278 | If C<flags> has the C<CV_NAME_NOTQUAL> bit set, then the package name will not be |
ecf05a58 FC |
2279 | included. If the first argument is neither a CV nor a GV, this flag is |
2280 | ignored (subject to change). | |
2281 | ||
fb094047 FC |
2282 | =cut |
2283 | */ | |
2284 | ||
c5569a55 | 2285 | SV * |
ecf05a58 | 2286 | Perl_cv_name(pTHX_ CV *cv, SV *sv, U32 flags) |
c5569a55 FC |
2287 | { |
2288 | PERL_ARGS_ASSERT_CV_NAME; | |
2289 | if (!isGV_with_GP(cv) && SvTYPE(cv) != SVt_PVCV) { | |
2290 | if (sv) sv_setsv(sv,(SV *)cv); | |
2291 | return sv ? (sv) : (SV *)cv; | |
2292 | } | |
2293 | { | |
f3fb6cf3 | 2294 | SV * const retsv = sv ? (sv) : sv_newmortal(); |
c5569a55 FC |
2295 | if (SvTYPE(cv) == SVt_PVCV) { |
2296 | if (CvNAMED(cv)) { | |
ecf05a58 FC |
2297 | if (CvLEXICAL(cv) || flags & CV_NAME_NOTQUAL) |
2298 | sv_sethek(retsv, CvNAME_HEK(cv)); | |
c5569a55 | 2299 | else { |
6881372e FC |
2300 | if (CvSTASH(cv) && HvNAME_HEK(CvSTASH(cv))) |
2301 | sv_sethek(retsv, HvNAME_HEK(CvSTASH(cv))); | |
2302 | else | |
2303 | sv_setpvs(retsv, "__ANON__"); | |
c5569a55 | 2304 | sv_catpvs(retsv, "::"); |
f34d8cdd | 2305 | sv_cathek(retsv, CvNAME_HEK(cv)); |
c5569a55 FC |
2306 | } |
2307 | } | |
ecf05a58 | 2308 | else if (CvLEXICAL(cv) || flags & CV_NAME_NOTQUAL) |
c5569a55 FC |
2309 | sv_sethek(retsv, GvNAME_HEK(GvEGV(CvGV(cv)))); |
2310 | else gv_efullname3(retsv, CvGV(cv), NULL); | |
2311 | } | |
ecf05a58 | 2312 | else if (flags & CV_NAME_NOTQUAL) sv_sethek(retsv, GvNAME_HEK(cv)); |
c5569a55 FC |
2313 | else gv_efullname3(retsv,(GV *)cv,NULL); |
2314 | return retsv; | |
2315 | } | |
2316 | } | |
2317 | ||
dd2155a4 | 2318 | /* |
cc76b5cc | 2319 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 | 2320 | |
796b6530 KW |
2321 | For any anon CVs in the pad, change C<CvOUTSIDE> of that CV from |
2322 | C<old_cv> to C<new_cv> if necessary. Needed when a newly-compiled CV has to be | |
7dafbf52 | 2323 | moved to a pre-existing CV struct. |
dd2155a4 DM |
2324 | |
2325 | =cut | |
2326 | */ | |
2327 | ||
2328 | void | |
2329 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2330 | { | |
d12be05d | 2331 | PADOFFSET ix; |
9b7476d7 | 2332 | PADNAMELIST * const comppad_name = PadlistNAMES(padlist); |
86d2498c | 2333 | AV * const comppad = PadlistARRAY(padlist)[1]; |
0f94cb1f | 2334 | PADNAME ** const namepad = PadnamelistARRAY(comppad_name); |
53c1dcc0 | 2335 | SV ** const curpad = AvARRAY(comppad); |
7918f24d NC |
2336 | |
2337 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2338 | PERL_UNUSED_ARG(old_cv); |
2339 | ||
9b7476d7 | 2340 | for (ix = PadnamelistMAX(comppad_name); ix > 0; ix--) { |
307cbb9f FC |
2341 | const PADNAME *name = namepad[ix]; |
2342 | if (name && name != &PL_padname_undef && !PadnameIsOUR(name) | |
0f94cb1f | 2343 | && *PadnamePV(name) == '&') |
dd2155a4 | 2344 | { |
307cbb9f FC |
2345 | CV *innercv = MUTABLE_CV(curpad[ix]); |
2346 | if (UNLIKELY(PadnameOUTER(name))) { | |
2347 | CV *cv = new_cv; | |
2348 | PADNAME **names = namepad; | |
2349 | PADOFFSET i = ix; | |
2350 | while (PadnameOUTER(name)) { | |
95c0a761 | 2351 | assert(SvTYPE(cv) == SVt_PVCV); |
307cbb9f FC |
2352 | cv = CvOUTSIDE(cv); |
2353 | names = PadlistNAMESARRAY(CvPADLIST(cv)); | |
2354 | i = PARENT_PAD_INDEX(name); | |
2355 | name = names[i]; | |
2356 | } | |
2357 | innercv = (CV *)PadARRAY(PadlistARRAY(CvPADLIST(cv))[1])[i]; | |
2358 | } | |
2359 | if (SvTYPE(innercv) == SVt_PVCV) { | |
0f94cb1f FC |
2360 | /* XXX 0afba48f added code here to check for a proto CV |
2361 | attached to the pad entry by magic. But shortly there- | |
2362 | after 81df9f6f95 moved the magic to the pad name. The | |
2363 | code here was never updated, so it wasn’t doing anything | |
2364 | and got deleted when PADNAME became a distinct type. Is | |
2365 | there any bug as a result? */ | |
0afba48f | 2366 | if (CvOUTSIDE(innercv) == old_cv) { |
1f122f9b FC |
2367 | if (!CvWEAKOUTSIDE(innercv)) { |
2368 | SvREFCNT_dec(old_cv); | |
2369 | SvREFCNT_inc_simple_void_NN(new_cv); | |
2370 | } | |
0afba48f FC |
2371 | CvOUTSIDE(innercv) = new_cv; |
2372 | } | |
e09ac076 FC |
2373 | } |
2374 | else { /* format reference */ | |
2375 | SV * const rv = curpad[ix]; | |
2376 | CV *innercv; | |
2377 | if (!SvOK(rv)) continue; | |
2378 | assert(SvROK(rv)); | |
2379 | assert(SvWEAKREF(rv)); | |
2380 | innercv = (CV *)SvRV(rv); | |
2381 | assert(!CvWEAKOUTSIDE(innercv)); | |
95c0a761 | 2382 | assert(CvOUTSIDE(innercv) == old_cv); |
e09ac076 FC |
2383 | SvREFCNT_dec(CvOUTSIDE(innercv)); |
2384 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2385 | } | |
dd2155a4 DM |
2386 | } |
2387 | } | |
2388 | } | |
2389 | ||
2390 | /* | |
cc76b5cc | 2391 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2392 | |
2393 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 | 2394 | this depth, in which case don't bother creating a new one. Then give |
796b6530 | 2395 | the new pad an C<@_> in slot zero. |
dd2155a4 DM |
2396 | |
2397 | =cut | |
2398 | */ | |
2399 | ||
2400 | void | |
26019298 | 2401 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2402 | { |
7918f24d NC |
2403 | PERL_ARGS_ASSERT_PAD_PUSH; |
2404 | ||
86d2498c FC |
2405 | if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) { |
2406 | PAD** const svp = PadlistARRAY(padlist); | |
44f8325f AL |
2407 | AV* const newpad = newAV(); |
2408 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
d12be05d DM |
2409 | PADOFFSET ix = AvFILLp((const AV *)svp[1]); |
2410 | const PADOFFSET names_fill = PadnamelistMAX((PADNAMELIST *)svp[0]); | |
a2ddd1d1 | 2411 | PADNAME ** const names = PadnamelistARRAY((PADNAMELIST *)svp[0]); |
26019298 AL |
2412 | AV *av; |
2413 | ||
dd2155a4 | 2414 | for ( ;ix > 0; ix--) { |
325e1816 | 2415 | if (names_fill >= ix && PadnameLEN(names[ix])) { |
a2ddd1d1 FC |
2416 | const char sigil = PadnamePV(names[ix])[0]; |
2417 | if (PadnameOUTER(names[ix]) | |
2418 | || PadnameIsSTATE(names[ix]) | |
fda94784 RGS |
2419 | || sigil == '&') |
2420 | { | |
dd2155a4 DM |
2421 | /* outer lexical or anon code */ |
2422 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2423 | } | |
2424 | else { /* our own lexical */ | |
26019298 AL |
2425 | SV *sv; |
2426 | if (sigil == '@') | |
ad64d0ec | 2427 | sv = MUTABLE_SV(newAV()); |
26019298 | 2428 | else if (sigil == '%') |
ad64d0ec | 2429 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2430 | else |
561b68a9 | 2431 | sv = newSV(0); |
26019298 | 2432 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2433 | } |
2434 | } | |
778f1807 | 2435 | else if (PadnamePV(names[ix])) { |
f84c484e | 2436 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2437 | } |
2438 | else { | |
2439 | /* save temporaries on recursion? */ | |
561b68a9 | 2440 | SV * const sv = newSV(0); |
26019298 | 2441 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2442 | SvPADTMP_on(sv); |
2443 | } | |
2444 | } | |
26019298 | 2445 | av = newAV(); |
ad64d0ec | 2446 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2447 | AvREIFY_only(av); |
26019298 | 2448 | |
7261499d | 2449 | padlist_store(padlist, depth, newpad); |
dd2155a4 DM |
2450 | } |
2451 | } | |
b21dc031 | 2452 | |
d5b1589c NC |
2453 | #if defined(USE_ITHREADS) |
2454 | ||
2455 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2456 | ||
cc76b5cc | 2457 | /* |
b70d5558 | 2458 | =for apidoc padlist_dup |
cc76b5cc Z |
2459 | |
2460 | Duplicates a pad. | |
2461 | ||
2462 | =cut | |
2463 | */ | |
2464 | ||
b70d5558 FC |
2465 | PADLIST * |
2466 | Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param) | |
d5b1589c | 2467 | { |
7261499d FC |
2468 | PADLIST *dstpad; |
2469 | bool cloneall; | |
2470 | PADOFFSET max; | |
2471 | ||
d5b1589c NC |
2472 | PERL_ARGS_ASSERT_PADLIST_DUP; |
2473 | ||
71c165d4 | 2474 | cloneall = cBOOL(param->flags & CLONEf_COPY_STACKS); |
86d2498c | 2475 | assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1); |
7261499d | 2476 | |
86d2498c | 2477 | max = cloneall ? PadlistMAX(srcpad) : 1; |
7261499d FC |
2478 | |
2479 | Newx(dstpad, 1, PADLIST); | |
2480 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
86d2498c FC |
2481 | PadlistMAX(dstpad) = max; |
2482 | Newx(PadlistARRAY(dstpad), max + 1, PAD *); | |
7261499d | 2483 | |
9b7476d7 FC |
2484 | PadlistARRAY(dstpad)[0] = (PAD *) |
2485 | padnamelist_dup(PadlistNAMES(srcpad), param); | |
2486 | PadnamelistREFCNT(PadlistNAMES(dstpad))++; | |
7261499d FC |
2487 | if (cloneall) { |
2488 | PADOFFSET depth; | |
9b7476d7 | 2489 | for (depth = 1; depth <= max; ++depth) |
86d2498c FC |
2490 | PadlistARRAY(dstpad)[depth] = |
2491 | av_dup_inc(PadlistARRAY(srcpad)[depth], param); | |
6de654a5 NC |
2492 | } else { |
2493 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2494 | to build anything other than the first level of pads. */ | |
d12be05d | 2495 | PADOFFSET ix = AvFILLp(PadlistARRAY(srcpad)[1]); |
6de654a5 | 2496 | AV *pad1; |
d12be05d | 2497 | const PADOFFSET names_fill = PadnamelistMAX(PadlistNAMES(srcpad)); |
86d2498c | 2498 | const PAD *const srcpad1 = PadlistARRAY(srcpad)[1]; |
6de654a5 | 2499 | SV **oldpad = AvARRAY(srcpad1); |
3e020df5 | 2500 | PADNAME ** const names = PadnamelistARRAY(PadlistNAMES(dstpad)); |
6de654a5 NC |
2501 | SV **pad1a; |
2502 | AV *args; | |
6de654a5 | 2503 | |
6de654a5 NC |
2504 | pad1 = newAV(); |
2505 | ||
2506 | av_extend(pad1, ix); | |
86d2498c | 2507 | PadlistARRAY(dstpad)[1] = pad1; |
6de654a5 | 2508 | pad1a = AvARRAY(pad1); |
6de654a5 NC |
2509 | |
2510 | if (ix > -1) { | |
2511 | AvFILLp(pad1) = ix; | |
2512 | ||
2513 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2514 | if (!oldpad[ix]) { |
2515 | pad1a[ix] = NULL; | |
ce0d59fd FC |
2516 | } else if (names_fill >= ix && names[ix] && |
2517 | PadnameLEN(names[ix])) { | |
3e020df5 FC |
2518 | const char sigil = PadnamePV(names[ix])[0]; |
2519 | if (PadnameOUTER(names[ix]) | |
2520 | || PadnameIsSTATE(names[ix]) | |
05d04d9c NC |
2521 | || sigil == '&') |
2522 | { | |
2523 | /* outer lexical or anon code */ | |
2524 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2525 | } | |
2526 | else { /* our own lexical */ | |
adf8f095 NC |
2527 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2528 | /* This is a work around for how the current | |
2529 | implementation of ?{ } blocks in regexps | |
2530 | interacts with lexicals. */ | |
05d04d9c NC |
2531 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2532 | } else { | |
2533 | SV *sv; | |
2534 | ||
2535 | if (sigil == '@') | |
2536 | sv = MUTABLE_SV(newAV()); | |
2537 | else if (sigil == '%') | |
2538 | sv = MUTABLE_SV(newHV()); | |
2539 | else | |
2540 | sv = newSV(0); | |
2541 | pad1a[ix] = sv; | |
05d04d9c NC |
2542 | } |
2543 | } | |
2544 | } | |
92154801 | 2545 | else if (( names_fill >= ix && names[ix] |
ce0d59fd | 2546 | && PadnamePV(names[ix]) )) { |
05d04d9c NC |
2547 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2548 | } | |
2549 | else { | |
2550 | /* save temporaries on recursion? */ | |
2551 | SV * const sv = newSV(0); | |
2552 | pad1a[ix] = sv; | |
2553 | ||
2554 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2555 | FIXTHAT before merging this branch. | |
2556 | (And I know how to) */ | |
145bf8ee | 2557 | if (SvPADTMP(oldpad[ix])) |
05d04d9c NC |
2558 | SvPADTMP_on(sv); |
2559 | } | |
6de654a5 NC |
2560 | } |
2561 | ||
2562 | if (oldpad[0]) { | |
2563 | args = newAV(); /* Will be @_ */ | |
2564 | AvREIFY_only(args); | |
2565 | pad1a[0] = (SV *)args; | |
2566 | } | |
2567 | } | |
2568 | } | |
d5b1589c NC |
2569 | |
2570 | return dstpad; | |
2571 | } | |
2572 | ||
cc76b5cc | 2573 | #endif /* USE_ITHREADS */ |
d5b1589c | 2574 | |
7261499d | 2575 | PAD ** |
5aaab254 | 2576 | Perl_padlist_store(pTHX_ PADLIST *padlist, I32 key, PAD *val) |
7261499d | 2577 | { |
7261499d | 2578 | PAD **ary; |
86d2498c | 2579 | SSize_t const oldmax = PadlistMAX(padlist); |
7261499d FC |
2580 | |
2581 | PERL_ARGS_ASSERT_PADLIST_STORE; | |
2582 | ||
2583 | assert(key >= 0); | |
2584 | ||
86d2498c FC |
2585 | if (key > PadlistMAX(padlist)) { |
2586 | av_extend_guts(NULL,key,&PadlistMAX(padlist), | |
2587 | (SV ***)&PadlistARRAY(padlist), | |
2588 | (SV ***)&PadlistARRAY(padlist)); | |
2589 | Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax, | |
7261499d FC |
2590 | PAD *); |
2591 | } | |
86d2498c | 2592 | ary = PadlistARRAY(padlist); |
7261499d FC |
2593 | SvREFCNT_dec(ary[key]); |
2594 | ary[key] = val; | |
2595 | return &ary[key]; | |
2596 | } | |
2597 | ||
66610fdd | 2598 | /* |
9b7476d7 FC |
2599 | =for apidoc newPADNAMELIST |
2600 | ||
2601 | Creates a new pad name list. C<max> is the highest index for which space | |
2602 | is allocated. | |
2603 | ||
2604 | =cut | |
2605 | */ | |
2606 | ||
2607 | PADNAMELIST * | |
a0e9f837 | 2608 | Perl_newPADNAMELIST(size_t max) |
9b7476d7 FC |
2609 | { |
2610 | PADNAMELIST *pnl; | |
2611 | Newx(pnl, 1, PADNAMELIST); | |
2612 | Newxz(PadnamelistARRAY(pnl), max+1, PADNAME *); | |
2613 | PadnamelistMAX(pnl) = -1; | |
2614 | PadnamelistREFCNT(pnl) = 1; | |
2615 | PadnamelistMAXNAMED(pnl) = 0; | |
2616 | pnl->xpadnl_max = max; | |
2617 | return pnl; | |
2618 | } | |
2619 | ||
2620 | /* | |
2621 | =for apidoc padnamelist_store | |
2622 | ||
2623 | Stores the pad name (which may be null) at the given index, freeing any | |
2624 | existing pad name in that slot. | |
2625 | ||
2626 | =cut | |
2627 | */ | |
2628 | ||
2629 | PADNAME ** | |
2630 | Perl_padnamelist_store(pTHX_ PADNAMELIST *pnl, SSize_t key, PADNAME *val) | |
2631 | { | |
2632 | PADNAME **ary; | |
2633 | ||
2634 | PERL_ARGS_ASSERT_PADNAMELIST_STORE; | |
2635 | ||
2636 | assert(key >= 0); | |
2637 | ||
2638 | if (key > pnl->xpadnl_max) | |
2639 | av_extend_guts(NULL,key,&pnl->xpadnl_max, | |
2640 | (SV ***)&PadnamelistARRAY(pnl), | |
2641 | (SV ***)&PadnamelistARRAY(pnl)); | |
2642 | if (PadnamelistMAX(pnl) < key) { | |
2643 | Zero(PadnamelistARRAY(pnl)+PadnamelistMAX(pnl)+1, | |
2644 | key-PadnamelistMAX(pnl), PADNAME *); | |
2645 | PadnamelistMAX(pnl) = key; | |
2646 | } | |
2647 | ary = PadnamelistARRAY(pnl); | |
0f94cb1f FC |
2648 | if (ary[key]) |
2649 | PadnameREFCNT_dec(ary[key]); | |
9b7476d7 FC |
2650 | ary[key] = val; |
2651 | return &ary[key]; | |
2652 | } | |
2653 | ||
2654 | /* | |
2655 | =for apidoc padnamelist_fetch | |
2656 | ||
2657 | Fetches the pad name from the given index. | |
2658 | ||
2659 | =cut | |
2660 | */ | |
2661 | ||
2662 | PADNAME * | |
a0e9f837 | 2663 | Perl_padnamelist_fetch(PADNAMELIST *pnl, SSize_t key) |
9b7476d7 FC |
2664 | { |
2665 | PERL_ARGS_ASSERT_PADNAMELIST_FETCH; | |
2666 | ASSUME(key >= 0); | |
2667 | ||
2668 | return key > PadnamelistMAX(pnl) ? NULL : PadnamelistARRAY(pnl)[key]; | |
2669 | } | |
2670 | ||
2671 | void | |
2672 | Perl_padnamelist_free(pTHX_ PADNAMELIST *pnl) | |
2673 | { | |
2674 | PERL_ARGS_ASSERT_PADNAMELIST_FREE; | |
2675 | if (!--PadnamelistREFCNT(pnl)) { | |
2676 | while(PadnamelistMAX(pnl) >= 0) | |
0f94cb1f FC |
2677 | { |
2678 | PADNAME * const pn = | |
2679 | PadnamelistARRAY(pnl)[PadnamelistMAX(pnl)--]; | |
2680 | if (pn) | |
2681 | PadnameREFCNT_dec(pn); | |
2682 | } | |
9b7476d7 FC |
2683 | Safefree(PadnamelistARRAY(pnl)); |
2684 | Safefree(pnl); | |
2685 | } | |
2686 | } | |
2687 | ||
2688 | #if defined(USE_ITHREADS) | |
2689 | ||
2690 | /* | |
2691 | =for apidoc padnamelist_dup | |
2692 | ||
2693 | Duplicates a pad name list. | |
2694 | ||
2695 | =cut | |
2696 | */ | |
2697 | ||
2698 | PADNAMELIST * | |
2699 | Perl_padnamelist_dup(pTHX_ PADNAMELIST *srcpad, CLONE_PARAMS *param) | |
2700 | { | |
2701 | PADNAMELIST *dstpad; | |
2702 | SSize_t max = PadnamelistMAX(srcpad); | |
2703 | ||
2704 | PERL_ARGS_ASSERT_PADNAMELIST_DUP; | |
2705 | ||
2706 | /* look for it in the table first */ | |
2707 | dstpad = (PADNAMELIST *)ptr_table_fetch(PL_ptr_table, srcpad); | |
2708 | if (dstpad) | |
2709 | return dstpad; | |
2710 | ||
2711 | dstpad = newPADNAMELIST(max); | |
2712 | PadnamelistREFCNT(dstpad) = 0; /* The caller will increment it. */ | |
2713 | PadnamelistMAXNAMED(dstpad) = PadnamelistMAXNAMED(srcpad); | |
2714 | PadnamelistMAX(dstpad) = max; | |
2715 | ||
2716 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
2717 | for (; max >= 0; max--) | |
0f94cb1f | 2718 | if (PadnamelistARRAY(srcpad)[max]) { |
9b7476d7 | 2719 | PadnamelistARRAY(dstpad)[max] = |
0f94cb1f FC |
2720 | padname_dup(PadnamelistARRAY(srcpad)[max], param); |
2721 | PadnameREFCNT(PadnamelistARRAY(dstpad)[max])++; | |
2722 | } | |
9b7476d7 FC |
2723 | |
2724 | return dstpad; | |
2725 | } | |
2726 | ||
2727 | #endif /* USE_ITHREADS */ | |
2728 | ||
0f94cb1f FC |
2729 | /* |
2730 | =for apidoc newPADNAMEpvn | |
2731 | ||
4a4088c4 | 2732 | Constructs and returns a new pad name. C<s> must be a UTF-8 string. Do not |
0f94cb1f | 2733 | use this for pad names that point to outer lexicals. See |
fbe13c60 | 2734 | C<L</newPADNAMEouter>>. |
0f94cb1f FC |
2735 | |
2736 | =cut | |
2737 | */ | |
2738 | ||
2739 | PADNAME * | |
a0e9f837 | 2740 | Perl_newPADNAMEpvn(const char *s, STRLEN len) |
0f94cb1f FC |
2741 | { |
2742 | struct padname_with_str *alloc; | |
2743 | char *alloc2; /* for Newxz */ | |
2744 | PADNAME *pn; | |
2745 | PERL_ARGS_ASSERT_NEWPADNAMEPVN; | |
2746 | Newxz(alloc2, | |
2747 | STRUCT_OFFSET(struct padname_with_str, xpadn_str[0]) + len + 1, | |
2748 | char); | |
2749 | alloc = (struct padname_with_str *)alloc2; | |
2750 | pn = (PADNAME *)alloc; | |
2751 | PadnameREFCNT(pn) = 1; | |
2752 | PadnamePV(pn) = alloc->xpadn_str; | |
2753 | Copy(s, PadnamePV(pn), len, char); | |
2754 | *(PadnamePV(pn) + len) = '\0'; | |
2755 | PadnameLEN(pn) = len; | |
2756 | return pn; | |
2757 | } | |
2758 | ||
2759 | /* | |
2760 | =for apidoc newPADNAMEouter | |
2761 | ||
2762 | Constructs and returns a new pad name. Only use this function for names | |
2d7f6611 | 2763 | that refer to outer lexicals. (See also L</newPADNAMEpvn>.) C<outer> is |
0f94cb1f | 2764 | the outer pad name that this one mirrors. The returned pad name has the |
796b6530 | 2765 | C<PADNAMEt_OUTER> flag already set. |
0f94cb1f FC |
2766 | |
2767 | =cut | |
2768 | */ | |
2769 | ||
2770 | PADNAME * | |
a0e9f837 | 2771 | Perl_newPADNAMEouter(PADNAME *outer) |
0f94cb1f FC |
2772 | { |
2773 | PADNAME *pn; | |
2774 | PERL_ARGS_ASSERT_NEWPADNAMEOUTER; | |
2775 | Newxz(pn, 1, PADNAME); | |
2776 | PadnameREFCNT(pn) = 1; | |
2777 | PadnamePV(pn) = PadnamePV(outer); | |
2778 | /* Not PadnameREFCNT(outer), because ‘outer’ may itself close over | |
2779 | another entry. The original pad name owns the buffer. */ | |
2780 | PadnameREFCNT(PADNAME_FROM_PV(PadnamePV(outer)))++; | |
2781 | PadnameFLAGS(pn) = PADNAMEt_OUTER; | |
2782 | PadnameLEN(pn) = PadnameLEN(outer); | |
2783 | return pn; | |
2784 | } | |
2785 | ||
2786 | void | |
2787 | Perl_padname_free(pTHX_ PADNAME *pn) | |
2788 | { | |
2789 | PERL_ARGS_ASSERT_PADNAME_FREE; | |
2790 | if (!--PadnameREFCNT(pn)) { | |
2791 | if (UNLIKELY(pn == &PL_padname_undef || pn == &PL_padname_const)) { | |
2792 | PadnameREFCNT(pn) = SvREFCNT_IMMORTAL; | |
2793 | return; | |
2794 | } | |
2795 | SvREFCNT_dec(PadnameTYPE(pn)); /* Takes care of protocv, too. */ | |
2796 | SvREFCNT_dec(PadnameOURSTASH(pn)); | |
2797 | if (PadnameOUTER(pn)) | |
2798 | PadnameREFCNT_dec(PADNAME_FROM_PV(PadnamePV(pn))); | |
2799 | Safefree(pn); | |
2800 | } | |
2801 | } | |
2802 | ||
2803 | #if defined(USE_ITHREADS) | |
2804 | ||
2805 | /* | |
2806 | =for apidoc padname_dup | |
2807 | ||
2808 | Duplicates a pad name. | |
2809 | ||
2810 | =cut | |
2811 | */ | |
2812 | ||
2813 | PADNAME * | |
2814 | Perl_padname_dup(pTHX_ PADNAME *src, CLONE_PARAMS *param) | |
2815 | { | |
2816 | PADNAME *dst; | |
2817 | ||
2818 | PERL_ARGS_ASSERT_PADNAME_DUP; | |
2819 | ||
2820 | /* look for it in the table first */ | |
2821 | dst = (PADNAME *)ptr_table_fetch(PL_ptr_table, src); | |
2822 | if (dst) | |
2823 | return dst; | |
2824 | ||
2825 | if (!PadnamePV(src)) { | |
2826 | dst = &PL_padname_undef; | |
2827 | ptr_table_store(PL_ptr_table, src, dst); | |
2828 | return dst; | |
2829 | } | |
2830 | ||
2831 | dst = PadnameOUTER(src) | |
2832 | ? newPADNAMEouter(padname_dup(PADNAME_FROM_PV(PadnamePV(src)), param)) | |
2833 | : newPADNAMEpvn(PadnamePV(src), PadnameLEN(src)); | |
2834 | ptr_table_store(PL_ptr_table, src, dst); | |
2835 | PadnameLEN(dst) = PadnameLEN(src); | |
2836 | PadnameFLAGS(dst) = PadnameFLAGS(src); | |
2837 | PadnameREFCNT(dst) = 0; /* The caller will increment it. */ | |
2838 | PadnameTYPE (dst) = (HV *)sv_dup_inc((SV *)PadnameTYPE(src), param); | |
2839 | PadnameOURSTASH(dst) = (HV *)sv_dup_inc((SV *)PadnameOURSTASH(src), | |
2840 | param); | |
2841 | dst->xpadn_low = src->xpadn_low; | |
2842 | dst->xpadn_high = src->xpadn_high; | |
2843 | dst->xpadn_gen = src->xpadn_gen; | |
2844 | return dst; | |
2845 | } | |
2846 | ||
2847 | #endif /* USE_ITHREADS */ | |
9b7476d7 FC |
2848 | |
2849 | /* | |
14d04a33 | 2850 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2851 | */ |