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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | * by Larry Wall and others | |
dd2155a4 DM |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
4ac71550 TC |
8 | */ |
9 | ||
10 | /* | |
11 | * 'Anyway: there was this Mr. Frodo left an orphan and stranded, as you | |
12 | * might say, among those queer Bucklanders, being brought up anyhow in | |
13 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
14 | * never had fewer than a couple of hundred relations in the place. | |
15 | * Mr. Bilbo never did a kinder deed than when he brought the lad back | |
16 | * to live among decent folk.' --the Gaffer | |
dd2155a4 | 17 | * |
4ac71550 | 18 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
dd2155a4 DM |
19 | */ |
20 | ||
21 | /* XXX DAPM | |
22 | * As of Sept 2002, this file is new and may be in a state of flux for | |
23 | * a while. I've marked things I intent to come back and look at further | |
24 | * with an 'XXX DAPM' comment. | |
25 | */ | |
26 | ||
27 | /* | |
28 | =head1 Pad Data Structures | |
29 | ||
cc76b5cc | 30 | =for apidoc Amx|PADLIST *|CvPADLIST|CV *cv |
166f8a29 | 31 | |
58a9b2fe | 32 | CV's can have CvPADLIST(cv) set to point to a PADLIST. This is the CV's |
cc76b5cc Z |
33 | scratchpad, which stores lexical variables and opcode temporary and |
34 | per-thread values. | |
dd2155a4 | 35 | |
58a9b2fe | 36 | For these purposes "formats" are a kind-of CV; eval""s are too (except they're |
dd2155a4 | 37 | not callable at will and are always thrown away after the eval"" is done |
58a9b2fe | 38 | executing). Require'd files are simply evals without any outer lexical |
b5c19bd7 | 39 | scope. |
dd2155a4 | 40 | |
eacbb379 | 41 | XSUBs do not have a CvPADLIST. dXSTARG fetches values from PL_curpad, |
dd2155a4 | 42 | but that is really the callers pad (a slot of which is allocated by |
eacbb379 DD |
43 | every entersub). Do not get or set CvPADLIST if a CV is an XSUB (as |
44 | determined by C<CvISXSUB()>), CvPADLIST slot is reused for a different | |
45 | internal purpose in XSUBs. | |
dd2155a4 | 46 | |
58a9b2fe | 47 | The PADLIST has a C array where pads are stored. |
dd2155a4 | 48 | |
9b7476d7 FC |
49 | The 0th entry of the PADLIST is a PADNAMELIST |
50 | which represents the "names" or rather | |
58a9b2fe | 51 | the "static type information" for lexicals. The individual elements of a |
9b7476d7 | 52 | PADNAMELIST are PADNAMEs. Future |
7a5eb04d | 53 | refactorings might stop the PADNAMELIST from being stored in the PADLIST's |
86d2498c | 54 | array, so don't rely on it. See L</PadlistNAMES>. |
dd2155a4 | 55 | |
58a9b2fe FC |
56 | The CvDEPTH'th entry of a PADLIST is a PAD (an AV) which is the stack frame |
57 | at that depth of recursion into the CV. The 0th slot of a frame AV is an | |
58 | AV which is @_. Other entries are storage for variables and op targets. | |
dd2155a4 | 59 | |
58a9b2fe | 60 | Iterating over the PADNAMELIST iterates over all possible pad |
272ce8bb | 61 | items. Pad slots for targets (SVs_PADTMP) |
307a54be FC |
62 | and GVs end up having &PL_padname_undef "names", while slots for constants |
63 | have &PL_padname_const "names" (see pad_alloc()). That &PL_padname_undef | |
64 | and &PL_padname_const are used is an implementation detail subject to | |
65 | change. To test for them, use C<!PadnamePV(name)> and C<PadnamePV(name) | |
66 | && !PadnameLEN(name)>, respectively. | |
dd2155a4 | 67 | |
307a54be | 68 | Only my/our variable slots get valid names. |
dd2155a4 DM |
69 | The rest are op targets/GVs/constants which are statically allocated |
70 | or resolved at compile time. These don't have names by which they | |
58a9b2fe | 71 | can be looked up from Perl code at run time through eval"" the way |
dd2155a4 DM |
72 | my/our variables can be. Since they can't be looked up by "name" |
73 | but only by their index allocated at compile time (which is usually | |
74 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
75 | ||
307a54be FC |
76 | The pad names in the PADNAMELIST have their PV holding the name of |
77 | the variable. The COP_SEQ_RANGE_LOW and _HIGH fields form a range | |
78 | (low+1..high inclusive) of cop_seq numbers for which the name is | |
79 | valid. During compilation, these fields may hold the special value | |
61f4bfbf | 80 | PERL_PADSEQ_INTRO to indicate various stages: |
0d311cdb DM |
81 | |
82 | COP_SEQ_RANGE_LOW _HIGH | |
83 | ----------------- ----- | |
84 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
85 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
86 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
87 | ||
307a54be FC |
88 | For typed lexicals PadnameTYPE points at the type stash. For C<our> |
89 | lexicals, PadnameOURSTASH points at the stash of the associated global (so | |
90 | that duplicate C<our> declarations in the same package can be detected). | |
91 | PadnameGEN is sometimes used to store the generation number during | |
92 | compilation. | |
93 | ||
94 | If PadnameOUTER is set on the pad name, then that slot in the frame AV | |
95 | is a REFCNT'ed reference to a lexical from "outside". Such entries | |
96 | are sometimes referred to as 'fake'. In this case, the name does not | |
97 | use 'low' and 'high' to store a cop_seq range, since it is in scope | |
98 | throughout. Instead 'high' stores some flags containing info about | |
b5c19bd7 | 99 | the real lexical (is it declared in an anon, and is it capable of being |
307a54be | 100 | instantiated multiple times?), and for fake ANONs, 'low' contains the index |
b5c19bd7 DM |
101 | within the parent's pad where the lexical's value is stored, to make |
102 | cloning quicker. | |
dd2155a4 | 103 | |
58a9b2fe | 104 | If the 'name' is '&' the corresponding entry in the PAD |
dd2155a4 | 105 | is a CV representing a possible closure. |
dd2155a4 | 106 | |
71f882da DM |
107 | Note that formats are treated as anon subs, and are cloned each time |
108 | write is called (if necessary). | |
109 | ||
ab8e66c1 | 110 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
58a9b2fe FC |
111 | and set on scope exit. This allows the |
112 | 'Variable $x is not available' warning | |
e6e7068b DM |
113 | to be generated in evals, such as |
114 | ||
115 | { my $x = 1; sub f { eval '$x'} } f(); | |
116 | ||
c9956dca FC |
117 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised', |
118 | but this internal state is stored in a separate pad entry. | |
d1186544 | 119 | |
36c300bb | 120 | =for apidoc AmxU|PADNAMELIST *|PL_comppad_name |
cc76b5cc Z |
121 | |
122 | During compilation, this points to the array containing the names part | |
123 | of the pad for the currently-compiling code. | |
124 | ||
36c300bb | 125 | =for apidoc AmxU|PAD *|PL_comppad |
cc76b5cc Z |
126 | |
127 | During compilation, this points to the array containing the values | |
128 | part of the pad for the currently-compiling code. (At runtime a CV may | |
129 | have many such value arrays; at compile time just one is constructed.) | |
130 | At runtime, this points to the array containing the currently-relevant | |
131 | values for the pad for the currently-executing code. | |
132 | ||
133 | =for apidoc AmxU|SV **|PL_curpad | |
134 | ||
135 | Points directly to the body of the L</PL_comppad> array. | |
c14a2249 | 136 | (I.e., this is C<PAD_ARRAY(PL_comppad)>.) |
cc76b5cc | 137 | |
dd2155a4 DM |
138 | =cut |
139 | */ | |
140 | ||
141 | ||
142 | #include "EXTERN.h" | |
143 | #define PERL_IN_PAD_C | |
144 | #include "perl.h" | |
952306ac | 145 | #include "keywords.h" |
dd2155a4 | 146 | |
3441fb63 | 147 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
0f94cb1f | 148 | STMT_START { (sv)->xpadn_low = (val); } STMT_END |
3441fb63 | 149 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ |
0f94cb1f | 150 | STMT_START { (sv)->xpadn_high = (val); } STMT_END |
809abb02 | 151 | |
0f94cb1f FC |
152 | #define PARENT_PAD_INDEX_set COP_SEQ_RANGE_LOW_set |
153 | #define PARENT_FAKELEX_FLAGS_set COP_SEQ_RANGE_HIGH_set | |
dd2155a4 | 154 | |
eacbb379 DD |
155 | #ifdef DEBUGGING |
156 | void | |
e69651e7 | 157 | Perl_set_padlist(CV * cv, PADLIST *padlist){ |
eacbb379 DD |
158 | PERL_ARGS_ASSERT_SET_PADLIST; |
159 | # if PTRSIZE == 8 | |
e5964223 | 160 | assert((Size_t)padlist != UINT64_C(0xEFEFEFEFEFEFEFEF)); |
eacbb379 | 161 | # elif PTRSIZE == 4 |
e5964223 | 162 | assert((Size_t)padlist != UINT64_C(0xEFEFEFEF)); |
eacbb379 DD |
163 | # else |
164 | # error unknown pointer size | |
165 | # endif | |
e5964223 | 166 | assert(!CvISXSUB(cv)); |
eacbb379 DD |
167 | ((XPVCV*)MUTABLE_PTR(SvANY(cv)))->xcv_padlist_u.xcv_padlist = padlist; |
168 | } | |
169 | #endif | |
5b16296c BF |
170 | |
171 | /* | |
cc76b5cc | 172 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 173 | |
cc76b5cc Z |
174 | Create a new padlist, updating the global variables for the |
175 | currently-compiling padlist to point to the new padlist. The following | |
176 | flags can be OR'ed together: | |
dd2155a4 DM |
177 | |
178 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 179 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
180 | padnew_SAVESUB also save extra stuff for start of sub |
181 | ||
182 | =cut | |
183 | */ | |
184 | ||
185 | PADLIST * | |
c7c737cb | 186 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 187 | { |
7261499d | 188 | PADLIST *padlist; |
9b7476d7 FC |
189 | PADNAMELIST *padname; |
190 | PAD *pad; | |
7261499d | 191 | PAD **ary; |
dd2155a4 | 192 | |
f3548bdc DM |
193 | ASSERT_CURPAD_LEGAL("pad_new"); |
194 | ||
dd2155a4 DM |
195 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
196 | * vars (based on flags) rather than storing vals + addresses for | |
197 | * each individually. Also see pad_block_start. | |
198 | * XXX DAPM Try to see whether all these conditionals are required | |
199 | */ | |
200 | ||
201 | /* save existing state, ... */ | |
202 | ||
203 | if (flags & padnew_SAVE) { | |
3979c56f | 204 | SAVECOMPPAD(); |
dd2155a4 | 205 | if (! (flags & padnew_CLONE)) { |
cbacc9aa | 206 | SAVESPTR(PL_comppad_name); |
dd2155a4 | 207 | SAVEI32(PL_padix); |
b54c5e14 | 208 | SAVEI32(PL_constpadix); |
dd2155a4 DM |
209 | SAVEI32(PL_comppad_name_fill); |
210 | SAVEI32(PL_min_intro_pending); | |
211 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 212 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 213 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 214 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
215 | } |
216 | } | |
217 | } | |
218 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
219 | * saved - check at some pt that this is okay */ | |
220 | ||
221 | /* ... create new pad ... */ | |
222 | ||
7261499d | 223 | Newxz(padlist, 1, PADLIST); |
dd2155a4 DM |
224 | pad = newAV(); |
225 | ||
226 | if (flags & padnew_CLONE) { | |
227 | /* XXX DAPM I dont know why cv_clone needs it | |
228 | * doing differently yet - perhaps this separate branch can be | |
229 | * dispensed with eventually ??? | |
230 | */ | |
231 | ||
e1ec3a88 | 232 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 233 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 234 | AvREIFY_only(a0); |
9ef8d569 | 235 | |
9b7476d7 | 236 | PadnamelistREFCNT(padname = PL_comppad_name)++; |
dd2155a4 DM |
237 | } |
238 | else { | |
b4db5868 | 239 | padlist->xpadl_id = PL_padlist_generation++; |
a0714e2c | 240 | av_store(pad, 0, NULL); |
9b7476d7 | 241 | padname = newPADNAMELIST(0); |
0f94cb1f | 242 | padnamelist_store(padname, 0, &PL_padname_undef); |
dd2155a4 DM |
243 | } |
244 | ||
7a6072a8 NC |
245 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
246 | array - names, and depth=1. The default for av_store() is to allocate | |
247 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
248 | up, so we inline the allocation of the array here. */ | |
7261499d | 249 | Newx(ary, 2, PAD *); |
86d2498c FC |
250 | PadlistMAX(padlist) = 1; |
251 | PadlistARRAY(padlist) = ary; | |
9b7476d7 | 252 | ary[0] = (PAD *)padname; |
7261499d | 253 | ary[1] = pad; |
dd2155a4 DM |
254 | |
255 | /* ... then update state variables */ | |
256 | ||
403799bf NC |
257 | PL_comppad = pad; |
258 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
259 | |
260 | if (! (flags & padnew_CLONE)) { | |
9ef8d569 | 261 | PL_comppad_name = padname; |
dd2155a4 DM |
262 | PL_comppad_name_fill = 0; |
263 | PL_min_intro_pending = 0; | |
264 | PL_padix = 0; | |
b54c5e14 | 265 | PL_constpadix = 0; |
b5c19bd7 | 266 | PL_cv_has_eval = 0; |
dd2155a4 DM |
267 | } |
268 | ||
269 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 270 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 271 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 272 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
273 | PTR2UV(padname), (UV)flags |
274 | ) | |
275 | ); | |
276 | ||
277 | return (PADLIST*)padlist; | |
278 | } | |
279 | ||
dd2155a4 | 280 | |
c4528262 NC |
281 | /* |
282 | =head1 Embedding Functions | |
283 | ||
284 | =for apidoc cv_undef | |
285 | ||
72d33970 | 286 | Clear out all the active components of a CV. This can happen either |
c4528262 NC |
287 | by an explicit C<undef &foo>, or by the reference count going to zero. |
288 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
289 | children can still follow the full lexical scope chain. | |
290 | ||
291 | =cut | |
292 | */ | |
293 | ||
294 | void | |
295 | Perl_cv_undef(pTHX_ CV *cv) | |
296 | { | |
b7acb0a3 FC |
297 | PERL_ARGS_ASSERT_CV_UNDEF; |
298 | cv_undef_flags(cv, 0); | |
299 | } | |
300 | ||
301 | void | |
302 | Perl_cv_undef_flags(pTHX_ CV *cv, U32 flags) | |
303 | { | |
52ec28d5 DD |
304 | CV cvbody;/*CV body will never be realloced inside this func, |
305 | so dont read it more than once, use fake CV so existing macros | |
306 | will work, the indirection and CV head struct optimized away*/ | |
307 | SvANY(&cvbody) = SvANY(cv); | |
c4528262 | 308 | |
b7acb0a3 | 309 | PERL_ARGS_ASSERT_CV_UNDEF_FLAGS; |
c4528262 NC |
310 | |
311 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
312 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
313 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
314 | ); | |
315 | ||
52ec28d5 DD |
316 | if (CvFILE(&cvbody)) { |
317 | char * file = CvFILE(&cvbody); | |
318 | CvFILE(&cvbody) = NULL; | |
319 | if(CvDYNFILE(&cvbody)) | |
320 | Safefree(file); | |
c4528262 | 321 | } |
dd2155a4 | 322 | |
52ec28d5 DD |
323 | /* CvSLABBED_off(&cvbody); *//* turned off below */ |
324 | /* release the sub's body */ | |
325 | if (!CvISXSUB(&cvbody)) { | |
326 | if(CvROOT(&cvbody)) { | |
327 | assert(SvTYPE(cv) == SVt_PVCV || SvTYPE(cv) == SVt_PVFM); /*unsafe is safe */ | |
328 | if (CvDEPTHunsafe(&cvbody)) { | |
329 | assert(SvTYPE(cv) == SVt_PVCV); | |
330 | Perl_croak_nocontext("Can't undef active subroutine"); | |
331 | } | |
332 | ENTER; | |
333 | ||
334 | PAD_SAVE_SETNULLPAD(); | |
335 | ||
336 | if (CvSLABBED(&cvbody)) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(&cvbody))); | |
337 | op_free(CvROOT(&cvbody)); | |
338 | CvROOT(&cvbody) = NULL; | |
339 | CvSTART(&cvbody) = NULL; | |
340 | LEAVE; | |
341 | } | |
342 | else if (CvSLABBED(&cvbody)) { | |
343 | if( CvSTART(&cvbody)) { | |
344 | ENTER; | |
345 | PAD_SAVE_SETNULLPAD(); | |
346 | ||
347 | /* discard any leaked ops */ | |
348 | if (PL_parser) | |
349 | parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(&cvbody)); | |
350 | opslab_force_free((OPSLAB *)CvSTART(&cvbody)); | |
351 | CvSTART(&cvbody) = NULL; | |
352 | ||
353 | LEAVE; | |
354 | } | |
7aef8e5b | 355 | #ifdef DEBUGGING |
52ec28d5 | 356 | else Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
8be227ab | 357 | #endif |
52ec28d5 DD |
358 | } |
359 | } | |
360 | else { /* dont bother checking if CvXSUB(cv) is true, less branching */ | |
361 | CvXSUB(&cvbody) = NULL; | |
362 | } | |
c4528262 | 363 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 364 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
b7acb0a3 | 365 | if (!(flags & CV_UNDEF_KEEP_NAME)) { |
52ec28d5 DD |
366 | if (CvNAMED(&cvbody)) { |
367 | CvNAME_HEK_set(&cvbody, NULL); | |
368 | CvNAMED_off(&cvbody); | |
b7acb0a3 FC |
369 | } |
370 | else CvGV_set(cv, NULL); | |
371 | } | |
c4528262 | 372 | |
c2736fce NC |
373 | /* This statement and the subsequence if block was pad_undef(). */ |
374 | pad_peg("pad_undef"); | |
375 | ||
eacbb379 | 376 | if (!CvISXSUB(&cvbody) && CvPADLIST(&cvbody)) { |
c2736fce | 377 | I32 ix; |
52ec28d5 | 378 | const PADLIST *padlist = CvPADLIST(&cvbody); |
c2736fce NC |
379 | |
380 | /* Free the padlist associated with a CV. | |
381 | If parts of it happen to be current, we null the relevant PL_*pad* | |
382 | global vars so that we don't have any dangling references left. | |
383 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
384 | subs to the outer of this cv. */ | |
385 | ||
386 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
387 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
388 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
389 | ); | |
390 | ||
391 | /* detach any '&' anon children in the pad; if afterwards they | |
392 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
393 | * bypassing us. */ | |
394 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
395 | * children, or integrate this loop with general cleanup */ | |
396 | ||
397 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
52ec28d5 DD |
398 | CV * const outercv = CvOUTSIDE(&cvbody); |
399 | const U32 seq = CvOUTSIDE_SEQ(&cvbody); | |
9b7476d7 | 400 | PADNAMELIST * const comppad_name = PadlistNAMES(padlist); |
cab74fca | 401 | PADNAME ** const namepad = PadnamelistARRAY(comppad_name); |
86d2498c | 402 | PAD * const comppad = PadlistARRAY(padlist)[1]; |
c2736fce | 403 | SV ** const curpad = AvARRAY(comppad); |
9b7476d7 | 404 | for (ix = PadnamelistMAX(comppad_name); ix > 0; ix--) { |
cab74fca FC |
405 | PADNAME * const name = namepad[ix]; |
406 | if (name && PadnamePV(name) && *PadnamePV(name) == '&') | |
c2736fce NC |
407 | { |
408 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
409 | U32 inner_rc = SvREFCNT(innercv); | |
410 | assert(inner_rc); | |
e09ac076 | 411 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
412 | |
413 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
414 | curpad[ix] = NULL; | |
fc2b2dca | 415 | SvREFCNT_dec_NN(innercv); |
c2736fce NC |
416 | inner_rc--; |
417 | } | |
418 | ||
419 | /* in use, not just a prototype */ | |
420 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
421 | assert(CvWEAKOUTSIDE(innercv)); | |
422 | /* don't relink to grandfather if he's being freed */ | |
423 | if (outercv && SvREFCNT(outercv)) { | |
424 | CvWEAKOUTSIDE_off(innercv); | |
425 | CvOUTSIDE(innercv) = outercv; | |
426 | CvOUTSIDE_SEQ(innercv) = seq; | |
427 | SvREFCNT_inc_simple_void_NN(outercv); | |
428 | } | |
429 | else { | |
430 | CvOUTSIDE(innercv) = NULL; | |
431 | } | |
432 | } | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
86d2498c | 437 | ix = PadlistMAX(padlist); |
aa2f79cf | 438 | while (ix > 0) { |
86d2498c | 439 | PAD * const sv = PadlistARRAY(padlist)[ix--]; |
c2736fce | 440 | if (sv) { |
7261499d | 441 | if (sv == PL_comppad) { |
c2736fce NC |
442 | PL_comppad = NULL; |
443 | PL_curpad = NULL; | |
444 | } | |
fc2b2dca | 445 | SvREFCNT_dec_NN(sv); |
c2736fce | 446 | } |
aa2f79cf NC |
447 | } |
448 | { | |
9b7476d7 FC |
449 | PADNAMELIST * const names = PadlistNAMES(padlist); |
450 | if (names == PL_comppad_name && PadnamelistREFCNT(names) == 1) | |
aa2f79cf | 451 | PL_comppad_name = NULL; |
9b7476d7 | 452 | PadnamelistREFCNT_dec(names); |
c2736fce | 453 | } |
86d2498c | 454 | if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist)); |
7261499d | 455 | Safefree(padlist); |
eacbb379 | 456 | CvPADLIST_set(&cvbody, NULL); |
c2736fce | 457 | } |
db6e00bd DD |
458 | else if (CvISXSUB(&cvbody)) |
459 | CvHSCXT(&cvbody) = NULL; | |
eacbb379 | 460 | /* else is (!CvISXSUB(&cvbody) && !CvPADLIST(&cvbody)) {do nothing;} */ |
c2736fce | 461 | |
c4528262 NC |
462 | |
463 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
52ec28d5 DD |
464 | if (!SvREFCNT(cv)) { |
465 | CV * outside = CvOUTSIDE(&cvbody); | |
466 | if(outside) { | |
467 | CvOUTSIDE(&cvbody) = NULL; | |
468 | if (!CvWEAKOUTSIDE(&cvbody)) | |
469 | SvREFCNT_dec_NN(outside); | |
470 | } | |
c4528262 | 471 | } |
52ec28d5 DD |
472 | if (CvCONST(&cvbody)) { |
473 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(&cvbody).any_ptr)); | |
474 | /* CvCONST_off(cv); *//* turned off below */ | |
c4528262 NC |
475 | } |
476 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
b7acb0a3 FC |
477 | * ref status of CvOUTSIDE and CvGV, and ANON, NAMED and |
478 | * LEXICAL, which are used to determine the sub's name. */ | |
52ec28d5 | 479 | CvFLAGS(&cvbody) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON|CVf_LEXICAL |
b7acb0a3 | 480 | |CVf_NAMED); |
c4528262 | 481 | } |
dd2155a4 | 482 | |
50dc2bd3 FC |
483 | /* |
484 | =for apidoc cv_forget_slab | |
485 | ||
486 | When a CV has a reference count on its slab (CvSLABBED), it is responsible | |
487 | for making sure it is freed. (Hence, no two CVs should ever have a | |
488 | reference count on the same slab.) The CV only needs to reference the slab | |
489 | during compilation. Once it is compiled and CvROOT attached, it has | |
490 | finished its job, so it can forget the slab. | |
491 | ||
492 | =cut | |
493 | */ | |
494 | ||
8be227ab FC |
495 | void |
496 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
497 | { | |
498 | const bool slabbed = !!CvSLABBED(cv); | |
3107b51f | 499 | OPSLAB *slab = NULL; |
8be227ab FC |
500 | |
501 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
502 | ||
503 | if (!slabbed) return; | |
504 | ||
505 | CvSLABBED_off(cv); | |
506 | ||
3107b51f FC |
507 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
508 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 509 | #ifdef DEBUGGING |
eb212a1c | 510 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
7aef8e5b | 511 | #endif |
3107b51f | 512 | |
3107b51f | 513 | if (slab) { |
f3e29105 NC |
514 | #ifdef PERL_DEBUG_READONLY_OPS |
515 | const size_t refcnt = slab->opslab_refcnt; | |
516 | #endif | |
3107b51f | 517 | OpslabREFCNT_dec(slab); |
f3e29105 | 518 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 519 | if (refcnt > 1) Slab_to_ro(slab); |
8be227ab | 520 | #endif |
f3e29105 | 521 | } |
7aef8e5b | 522 | } |
8be227ab | 523 | |
cc76b5cc | 524 | /* |
307a54be | 525 | =for apidoc m|PADOFFSET|pad_alloc_name|PADNAME *name|U32 flags|HV *typestash|HV *ourstash |
cc76b5cc | 526 | |
1a115e49 FC |
527 | Allocates a place in the currently-compiling |
528 | pad (via L<perlapi/pad_alloc>) and | |
307a54be FC |
529 | then stores a name for that entry. I<name> is adopted and |
530 | becomes the name entry; it must already contain the name | |
531 | string. I<typestash> and I<ourstash> and the C<padadd_STATE> | |
532 | flag get added to I<name>. None of the other | |
1a115e49 | 533 | processing of L<perlapi/pad_add_name_pvn> |
cc76b5cc Z |
534 | is done. Returns the offset of the allocated pad slot. |
535 | ||
536 | =cut | |
537 | */ | |
538 | ||
3291825f | 539 | static PADOFFSET |
e1c02f84 FC |
540 | S_pad_alloc_name(pTHX_ PADNAME *name, U32 flags, HV *typestash, |
541 | HV *ourstash) | |
3291825f | 542 | { |
3291825f NC |
543 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
544 | ||
cc76b5cc | 545 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 546 | |
cc76b5cc | 547 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
548 | |
549 | if (typestash) { | |
e1c02f84 | 550 | SvPAD_TYPED_on(name); |
0f94cb1f FC |
551 | PadnameTYPE(name) = |
552 | MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash))); | |
3291825f NC |
553 | } |
554 | if (ourstash) { | |
e1c02f84 FC |
555 | SvPAD_OUR_on(name); |
556 | SvOURSTASH_set(name, ourstash); | |
3291825f NC |
557 | SvREFCNT_inc_simple_void_NN(ourstash); |
558 | } | |
59cfed7d | 559 | else if (flags & padadd_STATE) { |
e1c02f84 | 560 | SvPAD_STATE_on(name); |
3291825f NC |
561 | } |
562 | ||
0f94cb1f | 563 | padnamelist_store(PL_comppad_name, offset, name); |
7db6405c | 564 | PadnamelistMAXNAMED(PL_comppad_name) = offset; |
3291825f NC |
565 | return offset; |
566 | } | |
567 | ||
dd2155a4 | 568 | /* |
cc76b5cc | 569 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 570 | |
cc76b5cc Z |
571 | Allocates a place in the currently-compiling pad for a named lexical |
572 | variable. Stores the name and other metadata in the name part of the | |
573 | pad, and makes preparations to manage the variable's lexical scoping. | |
574 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 575 | |
cc76b5cc Z |
576 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
577 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
578 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
579 | to a package variable, and this identifies the package. The following | |
580 | flags can be OR'ed together: | |
581 | ||
582 | padadd_OUR redundantly specifies if it's a package var | |
583 | padadd_STATE variable will retain value persistently | |
584 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
585 | |
586 | =cut | |
587 | */ | |
588 | ||
dd2155a4 | 589 | PADOFFSET |
cc76b5cc Z |
590 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
591 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 592 | { |
3291825f | 593 | PADOFFSET offset; |
e1c02f84 | 594 | PADNAME *name; |
dd2155a4 | 595 | |
cc76b5cc | 596 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 597 | |
2502ffdf | 598 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK)) |
cc76b5cc | 599 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
600 | (UV)flags); |
601 | ||
0f94cb1f | 602 | name = newPADNAMEpvn(namepv, namelen); |
dd2155a4 | 603 | |
59cfed7d | 604 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
c2b36a6d | 605 | ENTER; |
0f94cb1f | 606 | SAVEFREEPADNAME(name); /* in case of fatal warnings */ |
2d12d04f | 607 | /* check for duplicate declaration */ |
e1c02f84 | 608 | pad_check_dup(name, flags & padadd_OUR, ourstash); |
0f94cb1f | 609 | PadnameREFCNT(name)++; |
c2b36a6d | 610 | LEAVE; |
2d12d04f NC |
611 | } |
612 | ||
2502ffdf | 613 | offset = pad_alloc_name(name, flags, typestash, ourstash); |
3291825f NC |
614 | |
615 | /* not yet introduced */ | |
e1c02f84 FC |
616 | COP_SEQ_RANGE_LOW_set(name, PERL_PADSEQ_INTRO); |
617 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
3291825f NC |
618 | |
619 | if (!PL_min_intro_pending) | |
620 | PL_min_intro_pending = offset; | |
621 | PL_max_intro_pending = offset; | |
622 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
623 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
624 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 625 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 626 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 627 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 | 628 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
6d5c2147 FC |
629 | else if (namelen != 0 && *namepv == '&') |
630 | sv_upgrade(PL_curpad[offset], SVt_PVCV); | |
c1bf42f3 | 631 | assert(SvPADMY(PL_curpad[offset])); |
3291825f NC |
632 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
633 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
e1c02f84 | 634 | (long)offset, PadnamePV(name), |
cc76b5cc | 635 | PTR2UV(PL_curpad[offset]))); |
dd2155a4 DM |
636 | |
637 | return offset; | |
638 | } | |
639 | ||
cc76b5cc Z |
640 | /* |
641 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 642 | |
cc76b5cc Z |
643 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
644 | instead of a string/length pair. | |
dd2155a4 | 645 | |
cc76b5cc Z |
646 | =cut |
647 | */ | |
648 | ||
649 | PADOFFSET | |
650 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 651 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
652 | { |
653 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
654 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
655 | } | |
dd2155a4 DM |
656 | |
657 | /* | |
cc76b5cc | 658 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 659 | |
cc76b5cc Z |
660 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
661 | of an SV instead of a string/length pair. | |
662 | ||
663 | =cut | |
664 | */ | |
665 | ||
666 | PADOFFSET | |
667 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
668 | { | |
669 | char *namepv; | |
670 | STRLEN namelen; | |
671 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
2502ffdf | 672 | namepv = SvPVutf8(name, namelen); |
cc76b5cc Z |
673 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
674 | } | |
675 | ||
676 | /* | |
677 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
678 | ||
679 | Allocates a place in the currently-compiling pad, | |
680 | returning the offset of the allocated pad slot. | |
681 | No name is initially attached to the pad slot. | |
682 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
683 | which will be set in the value SV for the allocated pad entry: | |
684 | ||
685 | SVs_PADMY named lexical variable ("my", "our", "state") | |
686 | SVs_PADTMP unnamed temporary store | |
325e1816 FC |
687 | SVf_READONLY constant shared between recursion levels |
688 | ||
689 | C<SVf_READONLY> has been supported here only since perl 5.20. To work with | |
c370bd2e FC |
690 | earlier versions as well, use C<SVf_READONLY|SVs_PADTMP>. C<SVf_READONLY> |
691 | does not cause the SV in the pad slot to be marked read-only, but simply | |
692 | tells C<pad_alloc> that it I<will> be made read-only (by the caller), or at | |
693 | least should be treated as such. | |
cc76b5cc Z |
694 | |
695 | I<optype> should be an opcode indicating the type of operation that the | |
696 | pad entry is to support. This doesn't affect operational semantics, | |
697 | but is used for debugging. | |
dd2155a4 DM |
698 | |
699 | =cut | |
700 | */ | |
701 | ||
702 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
703 | * or at least rationalise ??? */ | |
dd2155a4 DM |
704 | |
705 | PADOFFSET | |
706 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
707 | { | |
708 | SV *sv; | |
709 | I32 retval; | |
710 | ||
6136c704 | 711 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
712 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
713 | ||
dd2155a4 | 714 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
715 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
716 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
717 | if (PL_pad_reset_pending) |
718 | pad_reset(); | |
c0683843 | 719 | if (tmptype == SVs_PADMY) { /* Not & because this ‘flag’ is 0. */ |
cc76b5cc | 720 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 721 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
722 | retval = AvFILLp(PL_comppad); |
723 | } | |
724 | else { | |
cc76b5cc Z |
725 | /* For a tmp, scan the pad from PL_padix upwards |
726 | * for a slot which has no name and no active value. | |
b54c5e14 | 727 | * For a constant, likewise, but use PL_constpadix. |
cc76b5cc | 728 | */ |
9b7476d7 FC |
729 | PADNAME * const * const names = PadnamelistARRAY(PL_comppad_name); |
730 | const SSize_t names_fill = PadnamelistMAX(PL_comppad_name); | |
b54c5e14 FC |
731 | const bool konst = cBOOL(tmptype & SVf_READONLY); |
732 | retval = konst ? PL_constpadix : PL_padix; | |
dd2155a4 DM |
733 | for (;;) { |
734 | /* | |
833bf1cd FC |
735 | * Entries that close over unavailable variables |
736 | * in outer subs contain values not marked PADMY. | |
737 | * Thus we must skip, not just pad values that are | |
dd2155a4 | 738 | * marked as current pad values, but also those with names. |
1780e744 FC |
739 | * If pad_reset is enabled, ‘current’ means different |
740 | * things depending on whether we are allocating a con- | |
741 | * stant or a target. For a target, things marked PADTMP | |
742 | * can be reused; not so for constants. | |
dd2155a4 | 743 | */ |
5e6246a7 | 744 | PADNAME *pn; |
b54c5e14 | 745 | if (++retval <= names_fill && |
5e6246a7 | 746 | (pn = names[retval]) && PadnamePV(pn)) |
dd2155a4 | 747 | continue; |
b54c5e14 | 748 | sv = *av_fetch(PL_comppad, retval, TRUE); |
a90643eb | 749 | if (!(SvFLAGS(sv) & |
53de1311 | 750 | #ifdef USE_PAD_RESET |
145bf8ee | 751 | (konst ? SVs_PADTMP : 0)) |
a90643eb | 752 | #else |
145bf8ee | 753 | SVs_PADTMP |
a90643eb | 754 | #endif |
13381c39 | 755 | )) |
dd2155a4 DM |
756 | break; |
757 | } | |
b54c5e14 | 758 | if (konst) { |
0f94cb1f | 759 | padnamelist_store(PL_comppad_name, retval, &PL_padname_const); |
325e1816 FC |
760 | tmptype &= ~SVf_READONLY; |
761 | tmptype |= SVs_PADTMP; | |
762 | } | |
b54c5e14 | 763 | *(konst ? &PL_constpadix : &PL_padix) = retval; |
dd2155a4 DM |
764 | } |
765 | SvFLAGS(sv) |= tmptype; | |
766 | PL_curpad = AvARRAY(PL_comppad); | |
767 | ||
768 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
769 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
770 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
771 | PL_op_name[optype])); | |
fd0854ff DM |
772 | #ifdef DEBUG_LEAKING_SCALARS |
773 | sv->sv_debug_optype = optype; | |
774 | sv->sv_debug_inpad = 1; | |
fd0854ff | 775 | #endif |
a212c8b5 | 776 | return (PADOFFSET)retval; |
dd2155a4 DM |
777 | } |
778 | ||
779 | /* | |
cc76b5cc | 780 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 781 | |
cc76b5cc Z |
782 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
783 | for an anonymous function that is lexically scoped inside the | |
784 | currently-compiling function. | |
785 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
786 | to the outer scope is weakened to avoid a reference loop. | |
787 | ||
84eea980 FC |
788 | One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>. |
789 | ||
cc76b5cc Z |
790 | I<optype> should be an opcode indicating the type of operation that the |
791 | pad entry is to support. This doesn't affect operational semantics, | |
792 | but is used for debugging. | |
dd2155a4 DM |
793 | |
794 | =cut | |
795 | */ | |
796 | ||
797 | PADOFFSET | |
cc76b5cc | 798 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 DM |
799 | { |
800 | PADOFFSET ix; | |
0f94cb1f | 801 | PADNAME * const name = newPADNAMEpvn("&", 1); |
7918f24d NC |
802 | |
803 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
74a9453a | 804 | assert (SvTYPE(func) == SVt_PVCV); |
7918f24d | 805 | |
1dba731d | 806 | pad_peg("add_anon"); |
0d311cdb | 807 | /* These two aren't used; just make sure they're not equal to |
0f94cb1f FC |
808 | * PERL_PADSEQ_INTRO. They should be 0 by default. */ |
809 | assert(COP_SEQ_RANGE_LOW (name) != PERL_PADSEQ_INTRO); | |
810 | assert(COP_SEQ_RANGE_HIGH(name) != PERL_PADSEQ_INTRO); | |
cc76b5cc | 811 | ix = pad_alloc(optype, SVs_PADMY); |
9b7476d7 | 812 | padnamelist_store(PL_comppad_name, ix, name); |
f3548bdc | 813 | /* XXX DAPM use PL_curpad[] ? */ |
74a9453a | 814 | av_store(PL_comppad, ix, (SV*)func); |
7dafbf52 DM |
815 | |
816 | /* to avoid ref loops, we never have parent + child referencing each | |
817 | * other simultaneously */ | |
74a9453a | 818 | if (CvOUTSIDE(func)) { |
cc76b5cc Z |
819 | assert(!CvWEAKOUTSIDE(func)); |
820 | CvWEAKOUTSIDE_on(func); | |
fc2b2dca | 821 | SvREFCNT_dec_NN(CvOUTSIDE(func)); |
7dafbf52 | 822 | } |
dd2155a4 DM |
823 | return ix; |
824 | } | |
825 | ||
a70f21d0 FC |
826 | void |
827 | Perl_pad_add_weakref(pTHX_ CV* func) | |
828 | { | |
829 | const PADOFFSET ix = pad_alloc(OP_NULL, SVs_PADMY); | |
830 | PADNAME * const name = newPADNAMEpvn("&", 1); | |
831 | SV * const rv = newRV_inc((SV *)func); | |
832 | ||
833 | PERL_ARGS_ASSERT_PAD_ADD_WEAKREF; | |
834 | ||
835 | /* These two aren't used; just make sure they're not equal to | |
836 | * PERL_PADSEQ_INTRO. They should be 0 by default. */ | |
837 | assert(COP_SEQ_RANGE_LOW (name) != PERL_PADSEQ_INTRO); | |
838 | assert(COP_SEQ_RANGE_HIGH(name) != PERL_PADSEQ_INTRO); | |
839 | padnamelist_store(PL_comppad_name, ix, name); | |
840 | sv_rvweaken(rv); | |
841 | av_store(PL_comppad, ix, rv); | |
842 | } | |
843 | ||
dd2155a4 | 844 | /* |
13087dd8 | 845 | =for apidoc pad_check_dup |
dd2155a4 DM |
846 | |
847 | Check for duplicate declarations: report any of: | |
13087dd8 | 848 | |
dd2155a4 | 849 | * a my in the current scope with the same name; |
13087dd8 FC |
850 | * an our (anywhere in the pad) with the same name and the |
851 | same stash as C<ourstash> | |
852 | ||
853 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
854 | |
855 | =cut | |
856 | */ | |
857 | ||
20381b50 | 858 | STATIC void |
e1c02f84 | 859 | S_pad_check_dup(pTHX_ PADNAME *name, U32 flags, const HV *ourstash) |
dd2155a4 | 860 | { |
0aaff5a1 | 861 | PADNAME **svp; |
dd2155a4 | 862 | PADOFFSET top, off; |
59cfed7d | 863 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 864 | |
7918f24d NC |
865 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
866 | ||
f3548bdc | 867 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 868 | |
59cfed7d | 869 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 870 | |
9b7476d7 | 871 | if (PadnamelistMAX(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
872 | return; /* nothing to check */ |
873 | ||
9b7476d7 FC |
874 | svp = PadnamelistARRAY(PL_comppad_name); |
875 | top = PadnamelistMAX(PL_comppad_name); | |
dd2155a4 DM |
876 | /* check the current scope */ |
877 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
878 | * type ? */ | |
879 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
0aaff5a1 | 880 | PADNAME * const sv = svp[off]; |
53c1dcc0 | 881 | if (sv |
0aaff5a1 FC |
882 | && PadnameLEN(sv) == PadnameLEN(name) |
883 | && !PadnameOUTER(sv) | |
0d311cdb DM |
884 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
885 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
0aaff5a1 | 886 | && memEQ(PadnamePV(sv), PadnamePV(name), PadnameLEN(name))) |
dd2155a4 | 887 | { |
00b1698f | 888 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 889 | break; /* "our" masking "our" */ |
4eb94d7c | 890 | /* diag_listed_as: "%s" variable %s masks earlier declaration in same %s */ |
dd2155a4 | 891 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
0aaff5a1 | 892 | "\"%s\" %s %"PNf" masks earlier declaration in same %s", |
12bd6ede | 893 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
0aaff5a1 FC |
894 | *PadnamePV(sv) == '&' ? "subroutine" : "variable", |
895 | PNfARG(sv), | |
2df5bdd7 DM |
896 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
897 | ? "scope" : "statement")); | |
dd2155a4 DM |
898 | --off; |
899 | break; | |
900 | } | |
901 | } | |
902 | /* check the rest of the pad */ | |
903 | if (is_our) { | |
61c5492a | 904 | while (off > 0) { |
0aaff5a1 | 905 | PADNAME * const sv = svp[off]; |
53c1dcc0 | 906 | if (sv |
0aaff5a1 FC |
907 | && PadnameLEN(sv) == PadnameLEN(name) |
908 | && !PadnameOUTER(sv) | |
0d311cdb DM |
909 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
910 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 911 | && SvOURSTASH(sv) == ourstash |
0aaff5a1 | 912 | && memEQ(PadnamePV(sv), PadnamePV(name), PadnameLEN(name))) |
dd2155a4 DM |
913 | { |
914 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
0aaff5a1 | 915 | "\"our\" variable %"PNf" redeclared", PNfARG(sv)); |
624f69f5 | 916 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
917 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
918 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
919 | break; |
920 | } | |
61c5492a NC |
921 | --off; |
922 | } | |
dd2155a4 DM |
923 | } |
924 | } | |
925 | ||
926 | ||
dd2155a4 | 927 | /* |
cc76b5cc | 928 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 929 | |
cc76b5cc Z |
930 | Given the name of a lexical variable, find its position in the |
931 | currently-compiling pad. | |
932 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
933 | I<flags> is reserved and must be zero. | |
934 | If it is not in the current pad but appears in the pad of any lexically | |
935 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
936 | Returns the offset in the current pad, | |
937 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
938 | |
939 | =cut | |
940 | */ | |
941 | ||
942 | PADOFFSET | |
cc76b5cc | 943 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 944 | { |
e1c02f84 | 945 | PADNAME *out_pn; |
b5c19bd7 | 946 | int out_flags; |
929a0744 | 947 | I32 offset; |
9b7476d7 | 948 | const PADNAMELIST *namelist; |
e1c02f84 | 949 | PADNAME **name_p; |
dd2155a4 | 950 | |
cc76b5cc | 951 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 952 | |
cc76b5cc | 953 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 954 | |
2502ffdf | 955 | if (flags) |
cc76b5cc | 956 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
957 | (UV)flags); |
958 | ||
fbb889c8 | 959 | offset = pad_findlex(namepv, namelen, flags, |
e1c02f84 | 960 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_pn, &out_flags); |
9f7d9405 | 961 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
962 | return offset; |
963 | ||
f0727190 FC |
964 | /* Skip the ‘our’ hack for subroutines, as the warning does not apply. |
965 | */ | |
966 | if (*namepv == '&') return NOT_IN_PAD; | |
967 | ||
929a0744 DM |
968 | /* look for an our that's being introduced; this allows |
969 | * our $foo = 0 unless defined $foo; | |
970 | * to not give a warning. (Yes, this is a hack) */ | |
971 | ||
9b7476d7 FC |
972 | namelist = PadlistNAMES(CvPADLIST(PL_compcv)); |
973 | name_p = PadnamelistARRAY(namelist); | |
974 | for (offset = PadnamelistMAXNAMED(namelist); offset > 0; offset--) { | |
e1c02f84 FC |
975 | const PADNAME * const name = name_p[offset]; |
976 | if (name && PadnameLEN(name) == namelen | |
977 | && !PadnameOUTER(name) | |
978 | && (PadnameIsOUR(name)) | |
2502ffdf FC |
979 | && ( PadnamePV(name) == namepv |
980 | || memEQ(PadnamePV(name), namepv, namelen) ) | |
e1c02f84 | 981 | && COP_SEQ_RANGE_LOW(name) == PERL_PADSEQ_INTRO |
929a0744 DM |
982 | ) |
983 | return offset; | |
984 | } | |
985 | return NOT_IN_PAD; | |
dd2155a4 DM |
986 | } |
987 | ||
e1f795dc | 988 | /* |
cc76b5cc Z |
989 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
990 | ||
991 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
992 | instead of a string/length pair. | |
993 | ||
994 | =cut | |
995 | */ | |
996 | ||
997 | PADOFFSET | |
998 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
999 | { | |
1000 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
1001 | return pad_findmy_pvn(name, strlen(name), flags); | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
1006 | ||
1007 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
1008 | of an SV instead of a string/length pair. | |
1009 | ||
1010 | =cut | |
1011 | */ | |
1012 | ||
1013 | PADOFFSET | |
1014 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1015 | { | |
1016 | char *namepv; | |
1017 | STRLEN namelen; | |
1018 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
2502ffdf | 1019 | namepv = SvPVutf8(name, namelen); |
cc76b5cc Z |
1020 | return pad_findmy_pvn(namepv, namelen, flags); |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1025 | ||
1026 | Find the position of the lexical C<$_> in the pad of the | |
1027 | currently-executing function. Returns the offset in the current pad, | |
1028 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1029 | the global one should be used instead). | |
1030 | L</find_rundefsv> is likely to be more convenient. | |
1031 | ||
1032 | =cut | |
1033 | */ | |
e1f795dc RGS |
1034 | |
1035 | PADOFFSET | |
29289021 | 1036 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 1037 | { |
e1c02f84 | 1038 | PADNAME *out_pn; |
e1f795dc | 1039 | int out_flags; |
fbb889c8 | 1040 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
e1c02f84 | 1041 | NULL, &out_pn, &out_flags); |
e1f795dc | 1042 | } |
dd2155a4 | 1043 | |
dd2155a4 | 1044 | /* |
cc76b5cc Z |
1045 | =for apidoc Am|SV *|find_rundefsv |
1046 | ||
1047 | Find and return the variable that is named C<$_> in the lexical scope | |
1048 | of the currently-executing function. This may be a lexical C<$_>, | |
1049 | or will otherwise be the global one. | |
1050 | ||
1051 | =cut | |
1052 | */ | |
789bd863 VP |
1053 | |
1054 | SV * | |
1055 | Perl_find_rundefsv(pTHX) | |
1056 | { | |
e1c02f84 | 1057 | PADNAME *name; |
789bd863 VP |
1058 | int flags; |
1059 | PADOFFSET po; | |
1060 | ||
fbb889c8 | 1061 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
e1c02f84 | 1062 | NULL, &name, &flags); |
789bd863 | 1063 | |
e1c02f84 | 1064 | if (po == NOT_IN_PAD || PadnameIsOUR(name)) |
789bd863 VP |
1065 | return DEFSV; |
1066 | ||
1067 | return PAD_SVl(po); | |
1068 | } | |
1069 | ||
c086f97a FC |
1070 | SV * |
1071 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1072 | { | |
e1c02f84 | 1073 | PADNAME *name; |
c086f97a FC |
1074 | int flags; |
1075 | PADOFFSET po; | |
1076 | ||
1077 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1078 | ||
1079 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
e1c02f84 | 1080 | NULL, &name, &flags); |
c086f97a | 1081 | |
e1c02f84 | 1082 | if (po == NOT_IN_PAD || PadnameIsOUR(name)) |
c086f97a FC |
1083 | return DEFSV; |
1084 | ||
86d2498c | 1085 | return AvARRAY(PadlistARRAY(CvPADLIST(cv))[CvDEPTH(cv)])[po]; |
c086f97a FC |
1086 | } |
1087 | ||
789bd863 | 1088 | /* |
e1c02f84 | 1089 | =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 | 1090 | |
72d33970 | 1091 | Find a named lexical anywhere in a chain of nested pads. Add fake entries |
b5c19bd7 DM |
1092 | in the inner pads if it's found in an outer one. |
1093 | ||
1094 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1095 | cv is the CV in which to start the search, and seq is the current cop_seq | |
72d33970 | 1096 | to match against. If warn is true, print appropriate warnings. The out_* |
b5c19bd7 | 1097 | vars return values, and so are pointers to where the returned values |
72d33970 | 1098 | should be stored. out_capture, if non-null, requests that the innermost |
e1c02f84 | 1099 | instance of the lexical is captured; out_name is set to the innermost |
307a54be FC |
1100 | matched pad name or fake pad name; out_flags returns the flags normally |
1101 | associated with the PARENT_FAKELEX_FLAGS field of a fake pad name. | |
b5c19bd7 DM |
1102 | |
1103 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
72d33970 FC |
1104 | then comes back down, adding fake entries |
1105 | as it goes. It has to be this way | |
307a54be | 1106 | because fake names in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1107 | the parent pad. |
dd2155a4 DM |
1108 | |
1109 | =cut | |
1110 | */ | |
1111 | ||
b5c19bd7 DM |
1112 | /* the CV has finished being compiled. This is not a sufficient test for |
1113 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1114 | #define CvCOMPILED(cv) CvROOT(cv) | |
1115 | ||
71f882da | 1116 | /* the CV does late binding of its lexicals */ |
e07561e6 | 1117 | #define CvLATE(cv) (CvANON(cv) || CvCLONE(cv) || SvTYPE(cv) == SVt_PVFM) |
71f882da | 1118 | |
445f13ff | 1119 | static void |
e6df7a56 | 1120 | S_unavailable(pTHX_ PADNAME *name) |
445f13ff FC |
1121 | { |
1122 | /* diag_listed_as: Variable "%s" is not available */ | |
1123 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
e6df7a56 FC |
1124 | "%se \"%"PNf"\" is not available", |
1125 | *PadnamePV(name) == '&' | |
445f13ff FC |
1126 | ? "Subroutin" |
1127 | : "Variabl", | |
e6df7a56 | 1128 | PNfARG(name)); |
445f13ff | 1129 | } |
b5c19bd7 | 1130 | |
dd2155a4 | 1131 | STATIC PADOFFSET |
fbb889c8 | 1132 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
e1c02f84 | 1133 | int warn, SV** out_capture, PADNAME** out_name, int *out_flags) |
dd2155a4 | 1134 | { |
b5c19bd7 DM |
1135 | I32 offset, new_offset; |
1136 | SV *new_capture; | |
1137 | SV **new_capturep; | |
b70d5558 | 1138 | const PADLIST * const padlist = CvPADLIST(cv); |
7ef30830 | 1139 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1140 | |
7918f24d NC |
1141 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1142 | ||
2502ffdf FC |
1143 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
1144 | if (flags) | |
2435e5d3 BF |
1145 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1146 | (UV)flags); | |
1147 | ||
b5c19bd7 | 1148 | *out_flags = 0; |
a3985cdc | 1149 | |
b5c19bd7 | 1150 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1151 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1152 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1153 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1154 | |
b5c19bd7 | 1155 | /* first, search this pad */ |
dd2155a4 | 1156 | |
b5c19bd7 DM |
1157 | if (padlist) { /* not an undef CV */ |
1158 | I32 fake_offset = 0; | |
9b7476d7 FC |
1159 | const PADNAMELIST * const names = PadlistNAMES(padlist); |
1160 | PADNAME * const * const name_p = PadnamelistARRAY(names); | |
ee6cee0c | 1161 | |
9b7476d7 | 1162 | for (offset = PadnamelistMAXNAMED(names); offset > 0; offset--) { |
e1c02f84 FC |
1163 | const PADNAME * const name = name_p[offset]; |
1164 | if (name && PadnameLEN(name) == namelen | |
2502ffdf FC |
1165 | && ( PadnamePV(name) == namepv |
1166 | || memEQ(PadnamePV(name), namepv, namelen) )) | |
b5c19bd7 | 1167 | { |
e1c02f84 | 1168 | if (PadnameOUTER(name)) { |
b5c19bd7 | 1169 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1170 | continue; |
1171 | } | |
e1c02f84 | 1172 | if (PadnameIN_SCOPE(name, seq)) |
03414f05 | 1173 | break; |
ee6cee0c DM |
1174 | } |
1175 | } | |
1176 | ||
b5c19bd7 DM |
1177 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1178 | if (offset > 0) { /* not fake */ | |
1179 | fake_offset = 0; | |
e1c02f84 | 1180 | *out_name = name_p[offset]; /* return the name */ |
b5c19bd7 DM |
1181 | |
1182 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1183 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1184 | * ideally, we should detect my's declared within loops | |
1185 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1186 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1187 | * lexes as not multi as viewed from evals. */ |
1188 | ||
1189 | *out_flags = CvANON(cv) ? | |
1190 | PAD_FAKELEX_ANON : | |
1191 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1192 | ? PAD_FAKELEX_MULTI : 0; | |
1193 | ||
1194 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1195 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1196 | PTR2UV(cv), (long)offset, | |
e1c02f84 FC |
1197 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name), |
1198 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name))); | |
b5c19bd7 DM |
1199 | } |
1200 | else { /* fake match */ | |
1201 | offset = fake_offset; | |
e1c02f84 FC |
1202 | *out_name = name_p[offset]; /* return the name */ |
1203 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name); | |
b5c19bd7 | 1204 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1205 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1206 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
e1c02f84 | 1207 | (unsigned long) PARENT_PAD_INDEX(*out_name) |
b5c19bd7 DM |
1208 | )); |
1209 | } | |
dd2155a4 | 1210 | |
b5c19bd7 | 1211 | /* return the lex? */ |
dd2155a4 | 1212 | |
b5c19bd7 | 1213 | if (out_capture) { |
dd2155a4 | 1214 | |
b5c19bd7 | 1215 | /* our ? */ |
e1c02f84 | 1216 | if (PadnameIsOUR(*out_name)) { |
a0714e2c | 1217 | *out_capture = NULL; |
b5c19bd7 DM |
1218 | return offset; |
1219 | } | |
ee6cee0c | 1220 | |
b5c19bd7 DM |
1221 | /* trying to capture from an anon prototype? */ |
1222 | if (CvCOMPILED(cv) | |
1223 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1224 | : *out_flags & PAD_FAKELEX_ANON) | |
1225 | { | |
a2a5de95 | 1226 | if (warn) |
445f13ff | 1227 | S_unavailable(aTHX_ |
f5658c36 | 1228 | *out_name); |
0727928e | 1229 | |
a0714e2c | 1230 | *out_capture = NULL; |
b5c19bd7 | 1231 | } |
ee6cee0c | 1232 | |
b5c19bd7 DM |
1233 | /* real value */ |
1234 | else { | |
1235 | int newwarn = warn; | |
1236 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
e1c02f84 | 1237 | && !PadnameIsSTATE(name_p[offset]) |
b5c19bd7 DM |
1238 | && warn && ckWARN(WARN_CLOSURE)) { |
1239 | newwarn = 0; | |
2a9203e9 FC |
1240 | /* diag_listed_as: Variable "%s" will not stay |
1241 | shared */ | |
b5c19bd7 | 1242 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
2a9203e9 FC |
1243 | "%se \"%"UTF8f"\" will not stay shared", |
1244 | *namepv == '&' ? "Subroutin" : "Variabl", | |
8d98b5bc | 1245 | UTF8fARG(1, namelen, namepv)); |
b5c19bd7 | 1246 | } |
dd2155a4 | 1247 | |
b5c19bd7 DM |
1248 | if (fake_offset && CvANON(cv) |
1249 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1250 | { | |
e1c02f84 | 1251 | PADNAME *n; |
b5c19bd7 DM |
1252 | /* not yet caught - look further up */ |
1253 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1254 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1255 | PTR2UV(cv))); | |
e1c02f84 | 1256 | n = *out_name; |
fbb889c8 | 1257 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1258 | CvOUTSIDE_SEQ(cv), |
e1c02f84 FC |
1259 | newwarn, out_capture, out_name, out_flags); |
1260 | *out_name = n; | |
b5c19bd7 | 1261 | return offset; |
dd2155a4 | 1262 | } |
b5c19bd7 | 1263 | |
86d2498c | 1264 | *out_capture = AvARRAY(PadlistARRAY(padlist)[ |
7261499d | 1265 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; |
b5c19bd7 DM |
1266 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1267 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1268 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1269 | |
d1186544 | 1270 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1271 | && (!CvDEPTH(cv) || !staleok) |
e1c02f84 | 1272 | && !PadnameIsSTATE(name_p[offset])) |
d1186544 | 1273 | { |
445f13ff | 1274 | S_unavailable(aTHX_ |
f5658c36 | 1275 | name_p[offset]); |
a0714e2c | 1276 | *out_capture = NULL; |
dd2155a4 DM |
1277 | } |
1278 | } | |
b5c19bd7 | 1279 | if (!*out_capture) { |
cc76b5cc | 1280 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1281 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1282 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1283 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
6d5c2147 FC |
1284 | else if (namelen != 0 && *namepv == '&') |
1285 | *out_capture = sv_2mortal(newSV_type(SVt_PVCV)); | |
b5c19bd7 DM |
1286 | else |
1287 | *out_capture = sv_newmortal(); | |
1288 | } | |
dd2155a4 | 1289 | } |
b5c19bd7 DM |
1290 | |
1291 | return offset; | |
ee6cee0c | 1292 | } |
b5c19bd7 DM |
1293 | } |
1294 | ||
1295 | /* it's not in this pad - try above */ | |
1296 | ||
1297 | if (!CvOUTSIDE(cv)) | |
1298 | return NOT_IN_PAD; | |
9f7d9405 | 1299 | |
b5c19bd7 | 1300 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1301 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1302 | new_capturep = out_capture ? out_capture : |
4608196e | 1303 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1304 | |
7ef30830 FC |
1305 | offset = pad_findlex(namepv, namelen, |
1306 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1307 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
e1c02f84 | 1308 | new_capturep, out_name, out_flags); |
9f7d9405 | 1309 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1310 | return NOT_IN_PAD; |
9f7d9405 | 1311 | |
b5c19bd7 DM |
1312 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1313 | ||
1314 | /* don't add new fake entries (via eval) to CVs that we have already | |
1315 | * finished compiling, or to undef CVs */ | |
1316 | if (CvCOMPILED(cv) || !padlist) | |
1317 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1318 | ||
1319 | { | |
3291825f | 1320 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1321 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1322 | "good" and only copying flag bits and pointers that it understands. |
1323 | */ | |
0f94cb1f | 1324 | PADNAME *new_name = newPADNAMEouter(*out_name); |
9b7476d7 | 1325 | PADNAMELIST * const ocomppad_name = PL_comppad_name; |
53c1dcc0 | 1326 | PAD * const ocomppad = PL_comppad; |
9b7476d7 | 1327 | PL_comppad_name = PadlistNAMES(padlist); |
86d2498c | 1328 | PL_comppad = PadlistARRAY(padlist)[1]; |
b5c19bd7 DM |
1329 | PL_curpad = AvARRAY(PL_comppad); |
1330 | ||
3291825f | 1331 | new_offset |
e1c02f84 FC |
1332 | = pad_alloc_name(new_name, |
1333 | PadnameIsSTATE(*out_name) ? padadd_STATE : 0, | |
1334 | PadnameTYPE(*out_name), | |
1335 | PadnameOURSTASH(*out_name) | |
3291825f NC |
1336 | ); |
1337 | ||
3291825f NC |
1338 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1339 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1340 | (long)new_offset, | |
e1c02f84 FC |
1341 | (int) PadnameLEN(new_name), |
1342 | PadnamePV(new_name))); | |
1343 | PARENT_FAKELEX_FLAGS_set(new_name, *out_flags); | |
b5c19bd7 | 1344 | |
e1c02f84 FC |
1345 | PARENT_PAD_INDEX_set(new_name, 0); |
1346 | if (PadnameIsOUR(new_name)) { | |
6f207bd3 | 1347 | NOOP; /* do nothing */ |
b5c19bd7 | 1348 | } |
71f882da | 1349 | else if (CvLATE(cv)) { |
b5c19bd7 | 1350 | /* delayed creation - just note the offset within parent pad */ |
e1c02f84 | 1351 | PARENT_PAD_INDEX_set(new_name, offset); |
b5c19bd7 DM |
1352 | CvCLONE_on(cv); |
1353 | } | |
1354 | else { | |
1355 | /* immediate creation - capture outer value right now */ | |
1356 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
81df9f6f | 1357 | /* But also note the offset, as newMYSUB needs it */ |
e1c02f84 | 1358 | PARENT_PAD_INDEX_set(new_name, offset); |
b5c19bd7 DM |
1359 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1360 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1361 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1362 | } |
e1c02f84 FC |
1363 | *out_name = new_name; |
1364 | *out_flags = PARENT_FAKELEX_FLAGS(new_name); | |
b5c19bd7 DM |
1365 | |
1366 | PL_comppad_name = ocomppad_name; | |
1367 | PL_comppad = ocomppad; | |
4608196e | 1368 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1369 | } |
b5c19bd7 | 1370 | return new_offset; |
dd2155a4 DM |
1371 | } |
1372 | ||
fb8a9836 | 1373 | #ifdef DEBUGGING |
cc76b5cc | 1374 | |
dd2155a4 | 1375 | /* |
cc76b5cc | 1376 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1377 | |
cc76b5cc | 1378 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1379 | Use macro PAD_SV instead of calling this function directly. |
1380 | ||
1381 | =cut | |
1382 | */ | |
1383 | ||
dd2155a4 DM |
1384 | SV * |
1385 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1386 | { | |
f3548bdc | 1387 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1388 | |
dd2155a4 DM |
1389 | if (!po) |
1390 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1391 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1392 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1393 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1394 | ); |
1395 | return PL_curpad[po]; | |
1396 | } | |
1397 | ||
dd2155a4 | 1398 | /* |
cc76b5cc | 1399 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1400 | |
cc76b5cc | 1401 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1402 | Use the macro PAD_SETSV() rather than calling this function directly. |
1403 | ||
1404 | =cut | |
1405 | */ | |
1406 | ||
dd2155a4 DM |
1407 | void |
1408 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1409 | { | |
7918f24d NC |
1410 | PERL_ARGS_ASSERT_PAD_SETSV; |
1411 | ||
f3548bdc | 1412 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1413 | |
1414 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1415 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1416 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1417 | ); |
1418 | PL_curpad[po] = sv; | |
1419 | } | |
dd2155a4 | 1420 | |
cc76b5cc | 1421 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1422 | |
1423 | /* | |
cc76b5cc | 1424 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 | 1425 | |
e89fca5e | 1426 | Update the pad compilation state variables on entry to a new block. |
dd2155a4 DM |
1427 | |
1428 | =cut | |
1429 | */ | |
1430 | ||
1431 | /* XXX DAPM perhaps: | |
1432 | * - integrate this in general state-saving routine ??? | |
1433 | * - combine with the state-saving going on in pad_new ??? | |
1434 | * - introduce a new SAVE type that does all this in one go ? | |
1435 | */ | |
1436 | ||
1437 | void | |
1438 | Perl_pad_block_start(pTHX_ int full) | |
1439 | { | |
f3548bdc | 1440 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 | 1441 | SAVEI32(PL_comppad_name_floor); |
9b7476d7 | 1442 | PL_comppad_name_floor = PadnamelistMAX(PL_comppad_name); |
dd2155a4 DM |
1443 | if (full) |
1444 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1445 | if (PL_comppad_name_floor < 0) | |
1446 | PL_comppad_name_floor = 0; | |
1447 | SAVEI32(PL_min_intro_pending); | |
1448 | SAVEI32(PL_max_intro_pending); | |
1449 | PL_min_intro_pending = 0; | |
1450 | SAVEI32(PL_comppad_name_fill); | |
1451 | SAVEI32(PL_padix_floor); | |
1780e744 FC |
1452 | /* PL_padix_floor is what PL_padix is reset to at the start of each |
1453 | statement, by pad_reset(). We set it when entering a new scope | |
1454 | to keep things like this working: | |
1455 | print "$foo$bar", do { this(); that() . "foo" }; | |
1456 | We must not let "$foo$bar" and the later concatenation share the | |
1457 | same target. */ | |
dd2155a4 DM |
1458 | PL_padix_floor = PL_padix; |
1459 | PL_pad_reset_pending = FALSE; | |
1460 | } | |
1461 | ||
dd2155a4 | 1462 | /* |
25f5d540 | 1463 | =for apidoc Am|U32|intro_my |
dd2155a4 | 1464 | |
25f5d540 LM |
1465 | "Introduce" C<my> variables to visible status. This is called during parsing |
1466 | at the end of each statement to make lexical variables visible to subsequent | |
1467 | statements. | |
dd2155a4 DM |
1468 | |
1469 | =cut | |
1470 | */ | |
1471 | ||
1472 | U32 | |
1473 | Perl_intro_my(pTHX) | |
1474 | { | |
6a0435be | 1475 | PADNAME **svp; |
dd2155a4 | 1476 | I32 i; |
6012dc80 | 1477 | U32 seq; |
dd2155a4 | 1478 | |
f3548bdc | 1479 | ASSERT_CURPAD_ACTIVE("intro_my"); |
8635e3c2 FC |
1480 | if (PL_compiling.cop_seq) { |
1481 | seq = PL_compiling.cop_seq; | |
1482 | PL_compiling.cop_seq = 0; | |
1483 | } | |
1484 | else | |
1485 | seq = PL_cop_seqmax; | |
dd2155a4 | 1486 | if (! PL_min_intro_pending) |
8635e3c2 | 1487 | return seq; |
dd2155a4 | 1488 | |
9b7476d7 | 1489 | svp = PadnamelistARRAY(PL_comppad_name); |
dd2155a4 | 1490 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { |
6a0435be | 1491 | PADNAME * const sv = svp[i]; |
53c1dcc0 | 1492 | |
6a0435be | 1493 | if (sv && PadnameLEN(sv) && !PadnameOUTER(sv) |
0d311cdb DM |
1494 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) |
1495 | { | |
2df5bdd7 | 1496 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1497 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1498 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1499 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
6a0435be | 1500 | (long)i, PadnamePV(sv), |
809abb02 NC |
1501 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1502 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1503 | ); |
1504 | } | |
1505 | } | |
953c8b80 | 1506 | COP_SEQMAX_INC; |
dd2155a4 DM |
1507 | PL_min_intro_pending = 0; |
1508 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1509 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1510 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1511 | |
6012dc80 | 1512 | return seq; |
dd2155a4 DM |
1513 | } |
1514 | ||
1515 | /* | |
cc76b5cc | 1516 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1517 | |
1518 | Cleanup at end of scope during compilation: set the max seq number for | |
1519 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1520 | ||
1521 | =cut | |
1522 | */ | |
1523 | ||
6d5c2147 | 1524 | OP * |
dd2155a4 DM |
1525 | Perl_pad_leavemy(pTHX) |
1526 | { | |
1527 | I32 off; | |
6d5c2147 | 1528 | OP *o = NULL; |
9b7476d7 | 1529 | PADNAME * const * const svp = PadnamelistARRAY(PL_comppad_name); |
dd2155a4 DM |
1530 | |
1531 | PL_pad_reset_pending = FALSE; | |
1532 | ||
f3548bdc | 1533 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1534 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1535 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
01b9977c FC |
1536 | const PADNAME * const name = svp[off]; |
1537 | if (name && PadnameLEN(name) && !PadnameOUTER(name)) | |
9b387841 | 1538 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
01b9977c FC |
1539 | "%"PNf" never introduced", |
1540 | PNfARG(name)); | |
dd2155a4 DM |
1541 | } |
1542 | } | |
1543 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
9b7476d7 FC |
1544 | for (off = PadnamelistMAX(PL_comppad_name); |
1545 | off > PL_comppad_name_fill; off--) { | |
01b9977c FC |
1546 | PADNAME * const sv = svp[off]; |
1547 | if (sv && PadnameLEN(sv) && !PadnameOUTER(sv) | |
2df5bdd7 DM |
1548 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) |
1549 | { | |
809abb02 | 1550 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1551 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1552 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
01b9977c | 1553 | (long)off, PadnamePV(sv), |
809abb02 NC |
1554 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1555 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 | 1556 | ); |
6d5c2147 FC |
1557 | if (!PadnameIsSTATE(sv) && !PadnameIsOUR(sv) |
1558 | && *PadnamePV(sv) == '&' && PadnameLEN(sv) > 1) { | |
1559 | OP *kid = newOP(OP_INTROCV, 0); | |
1560 | kid->op_targ = off; | |
1561 | o = op_prepend_elem(OP_LINESEQ, kid, o); | |
1562 | } | |
dd2155a4 DM |
1563 | } |
1564 | } | |
953c8b80 | 1565 | COP_SEQMAX_INC; |
dd2155a4 DM |
1566 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1567 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
6d5c2147 | 1568 | return o; |
dd2155a4 DM |
1569 | } |
1570 | ||
dd2155a4 | 1571 | /* |
cc76b5cc | 1572 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1573 | |
1574 | Abandon the tmp in the current pad at offset po and replace with a | |
1575 | new one. | |
1576 | ||
1577 | =cut | |
1578 | */ | |
1579 | ||
1580 | void | |
1581 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1582 | { | |
f3548bdc | 1583 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1584 | if (!PL_curpad) |
1585 | return; | |
1586 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1587 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1588 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1589 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1590 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1591 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1592 | |
1593 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1594 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1595 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1596 | ||
dd2155a4 DM |
1597 | if (refadjust) |
1598 | SvREFCNT_dec(PL_curpad[po]); | |
1599 | ||
9ad9869c DM |
1600 | |
1601 | /* if pad tmps aren't shared between ops, then there's no need to | |
1602 | * create a new tmp when an existing op is freed */ | |
53de1311 | 1603 | #ifdef USE_PAD_RESET |
561b68a9 | 1604 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1605 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c | 1606 | #else |
ce0d59fd | 1607 | PL_curpad[po] = NULL; |
97bf4a8d | 1608 | #endif |
325e1816 | 1609 | if (PadnamelistMAX(PL_comppad_name) != -1 |
4891fdfa | 1610 | && (PADOFFSET)PadnamelistMAX(PL_comppad_name) >= po) { |
ce0d59fd FC |
1611 | if (PadnamelistARRAY(PL_comppad_name)[po]) { |
1612 | assert(!PadnameLEN(PadnamelistARRAY(PL_comppad_name)[po])); | |
1613 | } | |
0f94cb1f | 1614 | PadnamelistARRAY(PL_comppad_name)[po] = &PL_padname_undef; |
325e1816 | 1615 | } |
b54c5e14 FC |
1616 | /* Use PL_constpadix here, not PL_padix. The latter may have been |
1617 | reset by pad_reset. We don’t want pad_alloc to have to scan the | |
1618 | whole pad when allocating a constant. */ | |
1619 | if ((I32)po < PL_constpadix) | |
1620 | PL_constpadix = po - 1; | |
dd2155a4 DM |
1621 | } |
1622 | ||
dd2155a4 | 1623 | /* |
cc76b5cc | 1624 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1625 | |
1626 | Mark all the current temporaries for reuse | |
1627 | ||
1628 | =cut | |
1629 | */ | |
1630 | ||
1780e744 FC |
1631 | /* pad_reset() causes pad temp TARGs (operator targets) to be shared |
1632 | * between OPs from different statements. During compilation, at the start | |
1633 | * of each statement pad_reset resets PL_padix back to its previous value. | |
1634 | * When allocating a target, pad_alloc begins its scan through the pad at | |
1635 | * PL_padix+1. */ | |
1f676739 | 1636 | static void |
82af08ae | 1637 | S_pad_reset(pTHX) |
dd2155a4 | 1638 | { |
53de1311 | 1639 | #ifdef USE_PAD_RESET |
dd2155a4 | 1640 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1641 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1642 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1643 | |
1644 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1645 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1646 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1647 | (long)PL_padix, (long)PL_padix_floor | |
1648 | ) | |
1649 | ); | |
1650 | ||
284167a5 | 1651 | if (!TAINTING_get) { /* Can't mix tainted and non-tainted temporaries. */ |
dd2155a4 DM |
1652 | PL_padix = PL_padix_floor; |
1653 | } | |
1654 | #endif | |
1655 | PL_pad_reset_pending = FALSE; | |
1656 | } | |
1657 | ||
dd2155a4 | 1658 | /* |
cc76b5cc Z |
1659 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1660 | ||
1661 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1662 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1663 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1664 | the kind of subroutine: | |
dd2155a4 | 1665 | |
cc76b5cc Z |
1666 | padtidy_SUB ordinary subroutine |
1667 | padtidy_SUBCLONE prototype for lexical closure | |
1668 | padtidy_FORMAT format | |
dd2155a4 DM |
1669 | |
1670 | =cut | |
1671 | */ | |
1672 | ||
1673 | /* XXX DAPM surely most of this stuff should be done properly | |
1674 | * at the right time beforehand, rather than going around afterwards | |
1675 | * cleaning up our mistakes ??? | |
1676 | */ | |
1677 | ||
1678 | void | |
1679 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1680 | { | |
27da23d5 | 1681 | dVAR; |
dd2155a4 | 1682 | |
f3548bdc | 1683 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 | 1684 | |
db21619c DM |
1685 | /* If this CV has had any 'eval-capable' ops planted in it: |
1686 | * i.e. it contains any of: | |
1687 | * | |
1688 | * * eval '...', | |
1689 | * * //ee, | |
1690 | * * use re 'eval'; /$var/ | |
1691 | * * /(?{..})/), | |
1692 | * | |
1693 | * Then any anon prototypes in the chain of CVs should be marked as | |
1694 | * cloneable, so that for example the eval's CV in | |
1695 | * | |
1696 | * sub { eval '$x' } | |
1697 | * | |
1698 | * gets the right CvOUTSIDE. If running with -d, *any* sub may | |
1699 | * potentially have an eval executed within it. | |
b5c19bd7 DM |
1700 | */ |
1701 | ||
1702 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1703 | const CV *cv; |
b5c19bd7 DM |
1704 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1705 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1706 | break; /* no need to mark already-compiled code */ | |
1707 | if (CvANON(cv)) { | |
1708 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1709 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1710 | CvCLONE_on(cv); | |
1711 | } | |
00cc8743 | 1712 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1713 | } |
1714 | } | |
1715 | ||
eb8137a9 | 1716 | /* extend namepad to match curpad */ |
9b7476d7 FC |
1717 | if (PadnamelistMAX(PL_comppad_name) < AvFILLp(PL_comppad)) |
1718 | padnamelist_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); | |
dd2155a4 DM |
1719 | |
1720 | if (type == padtidy_SUBCLONE) { | |
9b7476d7 | 1721 | PADNAME ** const namep = PadnamelistARRAY(PL_comppad_name); |
504618e9 | 1722 | PADOFFSET ix; |
b5c19bd7 | 1723 | |
dd2155a4 | 1724 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
dbfcda05 FC |
1725 | PADNAME *namesv; |
1726 | if (!namep[ix]) namep[ix] = &PL_padname_undef; | |
dd2155a4 | 1727 | |
dd2155a4 DM |
1728 | /* |
1729 | * The only things that a clonable function needs in its | |
3a6ce63a | 1730 | * pad are anonymous subs, constants and GVs. |
dd2155a4 DM |
1731 | * The rest are created anew during cloning. |
1732 | */ | |
b561f196 | 1733 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix])) |
3a6ce63a | 1734 | continue; |
ce0d59fd FC |
1735 | namesv = namep[ix]; |
1736 | if (!(PadnamePV(namesv) && | |
dbfcda05 | 1737 | (!PadnameLEN(namesv) || *PadnamePV(namesv) == '&'))) |
dd2155a4 DM |
1738 | { |
1739 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1740 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1741 | } |
1742 | } | |
1743 | } | |
1744 | else if (type == padtidy_SUB) { | |
1745 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1746 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1747 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1748 | AvREIFY_only(av); |
dd2155a4 DM |
1749 | } |
1750 | ||
4cee4ca8 | 1751 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
9b7476d7 | 1752 | PADNAME ** const namep = PadnamelistARRAY(PL_comppad_name); |
504618e9 | 1753 | PADOFFSET ix; |
dd2155a4 | 1754 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
0f94cb1f | 1755 | if (!namep[ix]) namep[ix] = &PL_padname_undef; |
2347c8c0 | 1756 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix])) |
dd2155a4 | 1757 | continue; |
0f94cb1f | 1758 | if (SvPADMY(PL_curpad[ix]) && !PadnameOUTER(namep[ix])) { |
adf8f095 NC |
1759 | /* This is a work around for how the current implementation of |
1760 | ?{ } blocks in regexps interacts with lexicals. | |
1761 | ||
1762 | One of our lexicals. | |
1763 | Can't do this on all lexicals, otherwise sub baz() won't | |
1764 | compile in | |
1765 | ||
1766 | my $foo; | |
1767 | ||
1768 | sub bar { ++$foo; } | |
1769 | ||
1770 | sub baz { ++$foo; } | |
1771 | ||
1772 | because completion of compiling &bar calling pad_tidy() | |
1773 | would cause (top level) $foo to be marked as stale, and | |
1774 | "no longer available". */ | |
1775 | SvPADSTALE_on(PL_curpad[ix]); | |
1776 | } | |
dd2155a4 DM |
1777 | } |
1778 | } | |
f3548bdc | 1779 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1780 | } |
1781 | ||
dd2155a4 | 1782 | /* |
cc76b5cc | 1783 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1784 | |
8627550a | 1785 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1786 | |
1787 | =cut | |
1788 | */ | |
1789 | ||
1790 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1791 | void | |
1792 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1793 | { | |
53de1311 | 1794 | #ifndef USE_PAD_RESET |
ad9e6ae1 | 1795 | SV *sv; |
ff06c6b2 | 1796 | #endif |
f3548bdc | 1797 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1798 | if (!PL_curpad) |
1799 | return; | |
1800 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1801 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1802 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1803 | if (!po) |
1804 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1805 | ||
1806 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1807 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1808 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1809 | ); | |
1810 | ||
53de1311 | 1811 | #ifndef USE_PAD_RESET |
ad9e6ae1 DM |
1812 | sv = PL_curpad[po]; |
1813 | if (sv && sv != &PL_sv_undef && !SvPADMY(sv)) | |
1814 | SvFLAGS(sv) &= ~SVs_PADTMP; | |
1815 | ||
dd2155a4 DM |
1816 | if ((I32)po < PL_padix) |
1817 | PL_padix = po - 1; | |
53d3c048 | 1818 | #endif |
dd2155a4 DM |
1819 | } |
1820 | ||
dd2155a4 | 1821 | /* |
cc76b5cc | 1822 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1823 | |
1824 | Dump the contents of a padlist | |
1825 | ||
1826 | =cut | |
1827 | */ | |
1828 | ||
1829 | void | |
1830 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1831 | { | |
9b7476d7 | 1832 | const PADNAMELIST *pad_name; |
e1ec3a88 | 1833 | const AV *pad; |
01326933 | 1834 | PADNAME **pname; |
dd2155a4 | 1835 | SV **ppad; |
dd2155a4 DM |
1836 | I32 ix; |
1837 | ||
7918f24d NC |
1838 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1839 | ||
dd2155a4 DM |
1840 | if (!padlist) { |
1841 | return; | |
1842 | } | |
9b7476d7 | 1843 | pad_name = PadlistNAMES(padlist); |
86d2498c | 1844 | pad = PadlistARRAY(padlist)[1]; |
9b7476d7 | 1845 | pname = PadnamelistARRAY(pad_name); |
dd2155a4 DM |
1846 | ppad = AvARRAY(pad); |
1847 | Perl_dump_indent(aTHX_ level, file, | |
1848 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1849 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1850 | ); | |
1851 | ||
9b7476d7 | 1852 | for (ix = 1; ix <= PadnamelistMAX(pad_name); ix++) { |
01326933 | 1853 | const PADNAME *namesv = pname[ix]; |
325e1816 | 1854 | if (namesv && !PadnameLEN(namesv)) { |
a0714e2c | 1855 | namesv = NULL; |
dd2155a4 DM |
1856 | } |
1857 | if (namesv) { | |
01326933 | 1858 | if (PadnameOUTER(namesv)) |
ee6cee0c | 1859 | Perl_dump_indent(aTHX_ level+1, file, |
c0fd1b42 | 1860 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1861 | (int) ix, |
1862 | PTR2UV(ppad[ix]), | |
1863 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
01326933 | 1864 | PadnamePV(namesv), |
809abb02 NC |
1865 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1866 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1867 | |
ee6cee0c DM |
1868 | ); |
1869 | else | |
1870 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1871 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1872 | (int) ix, |
1873 | PTR2UV(ppad[ix]), | |
1874 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1875 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1876 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
01326933 | 1877 | PadnamePV(namesv) |
ee6cee0c | 1878 | ); |
dd2155a4 DM |
1879 | } |
1880 | else if (full) { | |
1881 | Perl_dump_indent(aTHX_ level+1, file, | |
1882 | "%2d. 0x%"UVxf"<%lu>\n", | |
1883 | (int) ix, | |
1884 | PTR2UV(ppad[ix]), | |
1885 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1886 | ); | |
1887 | } | |
1888 | } | |
1889 | } | |
1890 | ||
cc76b5cc | 1891 | #ifdef DEBUGGING |
dd2155a4 DM |
1892 | |
1893 | /* | |
cc76b5cc | 1894 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1895 | |
1896 | dump the contents of a CV | |
1897 | ||
1898 | =cut | |
1899 | */ | |
1900 | ||
dd2155a4 | 1901 | STATIC void |
e1ec3a88 | 1902 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1903 | { |
53c1dcc0 | 1904 | const CV * const outside = CvOUTSIDE(cv); |
b70d5558 | 1905 | PADLIST* const padlist = CvPADLIST(cv); |
dd2155a4 | 1906 | |
7918f24d NC |
1907 | PERL_ARGS_ASSERT_CV_DUMP; |
1908 | ||
dd2155a4 DM |
1909 | PerlIO_printf(Perl_debug_log, |
1910 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1911 | title, | |
1912 | PTR2UV(cv), | |
1913 | (CvANON(cv) ? "ANON" | |
71f882da | 1914 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1915 | : (cv == PL_main_cv) ? "MAIN" |
1916 | : CvUNIQUE(cv) ? "UNIQUE" | |
1917 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1918 | PTR2UV(outside), | |
1919 | (!outside ? "null" | |
1920 | : CvANON(outside) ? "ANON" | |
1921 | : (outside == PL_main_cv) ? "MAIN" | |
1922 | : CvUNIQUE(outside) ? "UNIQUE" | |
1923 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1924 | ||
1925 | PerlIO_printf(Perl_debug_log, | |
1926 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1927 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1928 | } | |
dd2155a4 | 1929 | |
cc76b5cc | 1930 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1931 | |
1932 | /* | |
cc76b5cc | 1933 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1934 | |
cc76b5cc Z |
1935 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1936 | of the function: its code, pad structure, and other attributes. | |
1937 | The prototype is combined with a capture of outer lexicals to which the | |
1938 | code refers, which are taken from the currently-executing instance of | |
1939 | the immediately surrounding code. | |
dd2155a4 DM |
1940 | |
1941 | =cut | |
1942 | */ | |
1943 | ||
e10681aa FC |
1944 | static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside); |
1945 | ||
21195f4d | 1946 | static CV * |
5fab0186 | 1947 | S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside, bool newcv) |
dd2155a4 | 1948 | { |
dd2155a4 | 1949 | I32 ix; |
b70d5558 | 1950 | PADLIST* const protopadlist = CvPADLIST(proto); |
9b7476d7 | 1951 | PADNAMELIST *const protopad_name = PadlistNAMES(protopadlist); |
86d2498c | 1952 | const PAD *const protopad = PadlistARRAY(protopadlist)[1]; |
39899bf0 | 1953 | PADNAME** const pname = PadnamelistARRAY(protopad_name); |
53c1dcc0 | 1954 | SV** const ppad = AvARRAY(protopad); |
9b7476d7 | 1955 | const I32 fname = PadnamelistMAX(protopad_name); |
e1ec3a88 | 1956 | const I32 fpad = AvFILLp(protopad); |
b5c19bd7 | 1957 | SV** outpad; |
71f882da | 1958 | long depth; |
e07561e6 | 1959 | bool subclones = FALSE; |
7918f24d | 1960 | |
dd2155a4 DM |
1961 | assert(!CvUNIQUE(proto)); |
1962 | ||
1b5aaca6 FC |
1963 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
1964 | * reliable. The currently-running sub is always the one we need to | |
1965 | * close over. | |
8d88fe29 FC |
1966 | * For my subs, the currently-running sub may not be the one we want. |
1967 | * We have to check whether it is a clone of CvOUTSIDE. | |
1b5aaca6 FC |
1968 | * Note that in general for formats, CvOUTSIDE != find_runcv. |
1969 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 1970 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 1971 | */ |
71f882da | 1972 | |
e07561e6 | 1973 | if (!outside) { |
ebfebee4 | 1974 | if (CvWEAKOUTSIDE(proto)) |
71f882da | 1975 | outside = find_runcv(NULL); |
e07561e6 | 1976 | else { |
af41786f | 1977 | outside = CvOUTSIDE(proto); |
db4cf31d FC |
1978 | if ((CvCLONE(outside) && ! CvCLONED(outside)) |
1979 | || !CvPADLIST(outside) | |
b4db5868 | 1980 | || CvPADLIST(outside)->xpadl_id != protopadlist->xpadl_outid) { |
db4cf31d | 1981 | outside = find_runcv_where( |
a56015b9 | 1982 | FIND_RUNCV_padid_eq, PTR2IV(protopadlist->xpadl_outid), NULL |
70794f7b | 1983 | ); |
db4cf31d | 1984 | /* outside could be null */ |
5dff782d | 1985 | } |
e07561e6 | 1986 | } |
5dff782d | 1987 | } |
db4cf31d | 1988 | depth = outside ? CvDEPTH(outside) : 0; |
71f882da DM |
1989 | if (!depth) |
1990 | depth = 1; | |
b5c19bd7 | 1991 | |
dd2155a4 DM |
1992 | ENTER; |
1993 | SAVESPTR(PL_compcv); | |
e07561e6 | 1994 | PL_compcv = cv; |
5fab0186 | 1995 | if (newcv) SAVEFREESV(cv); /* in case of fatal warnings */ |
dd2155a4 | 1996 | |
a0d2bbd5 FC |
1997 | if (CvHASEVAL(cv)) |
1998 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
dd2155a4 | 1999 | |
cbacc9aa | 2000 | SAVESPTR(PL_comppad_name); |
9ef8d569 | 2001 | PL_comppad_name = protopad_name; |
eacbb379 | 2002 | CvPADLIST_set(cv, pad_new(padnew_CLONE|padnew_SAVE)); |
b4db5868 | 2003 | CvPADLIST(cv)->xpadl_id = protopadlist->xpadl_id; |
dd2155a4 | 2004 | |
b5c19bd7 | 2005 | av_fill(PL_comppad, fpad); |
dd2155a4 | 2006 | |
dd2155a4 DM |
2007 | PL_curpad = AvARRAY(PL_comppad); |
2008 | ||
db4cf31d | 2009 | outpad = outside && CvPADLIST(outside) |
86d2498c | 2010 | ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth]) |
f2ead8b8 | 2011 | : NULL; |
b4db5868 | 2012 | if (outpad) CvPADLIST(cv)->xpadl_outid = CvPADLIST(outside)->xpadl_id; |
b5c19bd7 | 2013 | |
dd2155a4 | 2014 | for (ix = fpad; ix > 0; ix--) { |
39899bf0 | 2015 | PADNAME* const namesv = (ix <= fname) ? pname[ix] : NULL; |
a0714e2c | 2016 | SV *sv = NULL; |
325e1816 | 2017 | if (namesv && PadnameLEN(namesv)) { /* lexical */ |
f2047bf1 FC |
2018 | if (PadnameIsOUR(namesv)) { /* or maybe not so lexical */ |
2019 | NOOP; | |
2020 | } | |
2021 | else { | |
39899bf0 | 2022 | if (PadnameOUTER(namesv)) { /* lexical from outside? */ |
5aec98df FC |
2023 | /* formats may have an inactive, or even undefined, parent; |
2024 | but state vars are always available. */ | |
f2ead8b8 | 2025 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe | 2026 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
db4cf31d | 2027 | && (!outside || !CvDEPTH(outside))) ) { |
445f13ff | 2028 | S_unavailable(aTHX_ namesv); |
a0714e2c | 2029 | sv = NULL; |
71f882da | 2030 | } |
33894c1a | 2031 | else |
f84c484e | 2032 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2033 | } |
71f882da | 2034 | if (!sv) { |
39899bf0 | 2035 | const char sigil = PadnamePV(namesv)[0]; |
e1ec3a88 | 2036 | if (sigil == '&') |
e07561e6 FC |
2037 | /* If there are state subs, we need to clone them, too. |
2038 | But they may need to close over variables we have | |
2039 | not cloned yet. So we will have to do a second | |
2040 | pass. Furthermore, there may be state subs clos- | |
2041 | ing over other state subs’ entries, so we have | |
2042 | to put a stub here and then clone into it on the | |
2043 | second pass. */ | |
6d5c2147 FC |
2044 | if (SvPAD_STATE(namesv) && !CvCLONED(ppad[ix])) { |
2045 | assert(SvTYPE(ppad[ix]) == SVt_PVCV); | |
2046 | subclones = 1; | |
2047 | sv = newSV_type(SVt_PVCV); | |
f3feca7a | 2048 | CvLEXICAL_on(sv); |
6d5c2147 FC |
2049 | } |
2050 | else if (PadnameLEN(namesv)>1 && !PadnameIsOUR(namesv)) | |
2051 | { | |
2052 | /* my sub */ | |
81df9f6f FC |
2053 | /* Just provide a stub, but name it. It will be |
2054 | upgrade to the real thing on scope entry. */ | |
f7cf2d13 | 2055 | dVAR; |
e1588866 | 2056 | U32 hash; |
39899bf0 FC |
2057 | PERL_HASH(hash, PadnamePV(namesv)+1, |
2058 | PadnameLEN(namesv) - 1); | |
81df9f6f | 2059 | sv = newSV_type(SVt_PVCV); |
cf748c3c FC |
2060 | CvNAME_HEK_set( |
2061 | sv, | |
39899bf0 FC |
2062 | share_hek(PadnamePV(namesv)+1, |
2063 | 1 - PadnameLEN(namesv), | |
e1588866 | 2064 | hash) |
cf748c3c | 2065 | ); |
f3feca7a | 2066 | CvLEXICAL_on(sv); |
6d5c2147 FC |
2067 | } |
2068 | else sv = SvREFCNT_inc(ppad[ix]); | |
e1ec3a88 | 2069 | else if (sigil == '@') |
ad64d0ec | 2070 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2071 | else if (sigil == '%') |
ad64d0ec | 2072 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2073 | else |
561b68a9 | 2074 | sv = newSV(0); |
0d3b281c | 2075 | /* reset the 'assign only once' flag on each state var */ |
e07561e6 | 2076 | if (sigil != '&' && SvPAD_STATE(namesv)) |
0d3b281c | 2077 | SvPADSTALE_on(sv); |
dd2155a4 | 2078 | } |
f2047bf1 | 2079 | } |
dd2155a4 | 2080 | } |
4c894bf7 | 2081 | else if (namesv && PadnamePV(namesv)) { |
f84c484e | 2082 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2083 | } |
2084 | else { | |
561b68a9 | 2085 | sv = newSV(0); |
dd2155a4 | 2086 | SvPADTMP_on(sv); |
dd2155a4 | 2087 | } |
71f882da | 2088 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2089 | } |
2090 | ||
e07561e6 FC |
2091 | if (subclones) |
2092 | for (ix = fpad; ix > 0; ix--) { | |
39899bf0 FC |
2093 | PADNAME * const name = (ix <= fname) ? pname[ix] : NULL; |
2094 | if (name && name != &PL_padname_undef && !PadnameOUTER(name) | |
2095 | && PadnamePV(name)[0] == '&' && PadnameIsSTATE(name)) | |
e07561e6 FC |
2096 | S_cv_clone(aTHX_ (CV *)ppad[ix], (CV *)PL_curpad[ix], cv); |
2097 | } | |
2098 | ||
5fab0186 | 2099 | if (newcv) SvREFCNT_inc_simple_void_NN(cv); |
e10681aa | 2100 | LEAVE; |
21195f4d | 2101 | |
1567c65a FC |
2102 | if (CvCONST(cv)) { |
2103 | /* Constant sub () { $x } closing over $x: | |
2104 | * The prototype was marked as a candiate for const-ization, | |
2105 | * so try to grab the current const value, and if successful, | |
2106 | * turn into a const sub: | |
2107 | */ | |
d8d6ddf8 FC |
2108 | SV* const_sv; |
2109 | OP *o = CvSTART(cv); | |
1567c65a | 2110 | assert(newcv); |
d8d6ddf8 FC |
2111 | for (; o; o = o->op_next) |
2112 | if (o->op_type == OP_PADSV) | |
2113 | break; | |
2114 | ASSUME(o->op_type == OP_PADSV); | |
2115 | const_sv = PAD_BASE_SV(CvPADLIST(cv), o->op_targ); | |
2116 | /* the candidate should have 1 ref from this pad and 1 ref | |
2117 | * from the parent */ | |
2118 | if (const_sv && SvREFCNT(const_sv) == 2) { | |
1567c65a | 2119 | const bool was_method = cBOOL(CvMETHOD(cv)); |
04472a84 | 2120 | bool copied = FALSE; |
d8d6ddf8 FC |
2121 | if (outside) { |
2122 | PADNAME * const pn = | |
2123 | PadlistNAMESARRAY(CvPADLIST(outside)) | |
2124 | [PARENT_PAD_INDEX(PadlistNAMESARRAY( | |
2125 | CvPADLIST(cv))[o->op_targ])]; | |
2126 | assert(PadnameOUTER(PadlistNAMESARRAY(CvPADLIST(cv)) | |
2127 | [o->op_targ])); | |
2128 | if (PadnameLVALUE(pn)) { | |
2129 | /* We have a lexical that is potentially modifiable | |
2130 | elsewhere, so making a constant will break clo- | |
2131 | sure behaviour. If this is a ‘simple lexical | |
2132 | op tree’, i.e., sub(){$x}, emit a deprecation | |
2133 | warning, but continue to exhibit the old behav- | |
2134 | iour of making it a constant based on the ref- | |
2135 | count of the candidate variable. | |
2136 | ||
2137 | A simple lexical op tree looks like this: | |
2138 | ||
2139 | leavesub | |
2140 | lineseq | |
2141 | nextstate | |
2142 | padsv | |
2143 | */ | |
e6dae479 | 2144 | if (OpSIBLING( |
d8d6ddf8 FC |
2145 | cUNOPx(cUNOPx(CvROOT(cv))->op_first)->op_first |
2146 | ) == o | |
e6dae479 | 2147 | && !OpSIBLING(o)) |
04472a84 | 2148 | { |
d8d6ddf8 FC |
2149 | Perl_ck_warner_d(aTHX_ |
2150 | packWARN(WARN_DEPRECATED), | |
2151 | "Constants from lexical " | |
2152 | "variables potentially " | |
2153 | "modified elsewhere are " | |
2154 | "deprecated"); | |
04472a84 FC |
2155 | /* We *copy* the lexical variable, and donate the |
2156 | copy to newCONSTSUB. Yes, this is ugly, and | |
2157 | should be killed. We need to do this for the | |
2158 | time being, however, because turning on SvPADTMP | |
2159 | on a lexical will have observable effects | |
2160 | elsewhere. */ | |
2161 | const_sv = newSVsv(const_sv); | |
2162 | copied = TRUE; | |
2163 | } | |
d8d6ddf8 FC |
2164 | else |
2165 | goto constoff; | |
2166 | } | |
2167 | } | |
04472a84 FC |
2168 | if (!copied) |
2169 | SvREFCNT_inc_simple_void_NN(const_sv); | |
2170 | /* If the lexical is not used elsewhere, it is safe to turn on | |
2171 | SvPADTMP, since it is only when it is used in lvalue con- | |
2172 | text that the difference is observable. */ | |
6dfba0aa | 2173 | SvREADONLY_on(const_sv); |
d8d6ddf8 | 2174 | SvPADTMP_on(const_sv); |
1567c65a | 2175 | SvREFCNT_dec_NN(cv); |
1567c65a FC |
2176 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
2177 | if (was_method) | |
2178 | CvMETHOD_on(cv); | |
2179 | } | |
2180 | else { | |
d8d6ddf8 | 2181 | constoff: |
1567c65a FC |
2182 | CvCONST_off(cv); |
2183 | } | |
2184 | } | |
2185 | ||
21195f4d | 2186 | return cv; |
e10681aa FC |
2187 | } |
2188 | ||
2189 | static CV * | |
2190 | S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside) | |
2191 | { | |
20b7effb | 2192 | #ifdef USE_ITHREADS |
c04ef36e | 2193 | dVAR; |
20b7effb | 2194 | #endif |
5fab0186 | 2195 | const bool newcv = !cv; |
c04ef36e | 2196 | |
e10681aa FC |
2197 | assert(!CvUNIQUE(proto)); |
2198 | ||
2199 | if (!cv) cv = MUTABLE_CV(newSV_type(SvTYPE(proto))); | |
2200 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC | |
2201 | |CVf_SLABBED); | |
2202 | CvCLONED_on(cv); | |
2203 | ||
2204 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) | |
2205 | : CvFILE(proto); | |
2206 | if (CvNAMED(proto)) | |
2e800d79 | 2207 | CvNAME_HEK_set(cv, share_hek_hek(CvNAME_HEK(proto))); |
e10681aa FC |
2208 | else CvGV_set(cv,CvGV(proto)); |
2209 | CvSTASH_set(cv, CvSTASH(proto)); | |
2210 | OP_REFCNT_LOCK; | |
2211 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
2212 | OP_REFCNT_UNLOCK; | |
2213 | CvSTART(cv) = CvSTART(proto); | |
2214 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
2215 | ||
fdf416b6 | 2216 | if (SvPOK(proto)) { |
e10681aa | 2217 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
fdf416b6 BF |
2218 | if (SvUTF8(proto)) |
2219 | SvUTF8_on(MUTABLE_SV(cv)); | |
2220 | } | |
e10681aa FC |
2221 | if (SvMAGIC(proto)) |
2222 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
2223 | ||
21195f4d FC |
2224 | if (CvPADLIST(proto)) |
2225 | cv = S_cv_clone_pad(aTHX_ proto, cv, outside, newcv); | |
e10681aa | 2226 | |
dd2155a4 DM |
2227 | DEBUG_Xv( |
2228 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
e10681aa | 2229 | if (CvOUTSIDE(cv)) cv_dump(CvOUTSIDE(cv), "Outside"); |
dd2155a4 DM |
2230 | cv_dump(proto, "Proto"); |
2231 | cv_dump(cv, "To"); | |
2232 | ); | |
2233 | ||
dd2155a4 DM |
2234 | return cv; |
2235 | } | |
2236 | ||
e07561e6 FC |
2237 | CV * |
2238 | Perl_cv_clone(pTHX_ CV *proto) | |
2239 | { | |
2240 | PERL_ARGS_ASSERT_CV_CLONE; | |
2241 | ||
fead5351 | 2242 | if (!CvPADLIST(proto)) Perl_croak(aTHX_ "panic: no pad in cv_clone"); |
e07561e6 FC |
2243 | return S_cv_clone(aTHX_ proto, NULL, NULL); |
2244 | } | |
2245 | ||
6d5c2147 FC |
2246 | /* Called only by pp_clonecv */ |
2247 | CV * | |
2248 | Perl_cv_clone_into(pTHX_ CV *proto, CV *target) | |
2249 | { | |
2250 | PERL_ARGS_ASSERT_CV_CLONE_INTO; | |
2251 | cv_undef(target); | |
2252 | return S_cv_clone(aTHX_ proto, target, NULL); | |
2253 | } | |
2254 | ||
fb094047 FC |
2255 | /* |
2256 | =for apidoc cv_name | |
2257 | ||
2258 | Returns an SV containing the name of the CV, mainly for use in error | |
2259 | reporting. The CV may actually be a GV instead, in which case the returned | |
7a275a2e FC |
2260 | SV holds the GV's name. Anything other than a GV or CV is treated as a |
2261 | string already holding the sub name, but this could change in the future. | |
fb094047 FC |
2262 | |
2263 | An SV may be passed as a second argument. If so, the name will be assigned | |
2264 | to it and it will be returned. Otherwise the returned SV will be a new | |
2265 | mortal. | |
2266 | ||
ecf05a58 FC |
2267 | If the I<flags> include CV_NAME_NOTQUAL, then the package name will not be |
2268 | included. If the first argument is neither a CV nor a GV, this flag is | |
2269 | ignored (subject to change). | |
2270 | ||
fb094047 FC |
2271 | =cut |
2272 | */ | |
2273 | ||
c5569a55 | 2274 | SV * |
ecf05a58 | 2275 | Perl_cv_name(pTHX_ CV *cv, SV *sv, U32 flags) |
c5569a55 FC |
2276 | { |
2277 | PERL_ARGS_ASSERT_CV_NAME; | |
2278 | if (!isGV_with_GP(cv) && SvTYPE(cv) != SVt_PVCV) { | |
2279 | if (sv) sv_setsv(sv,(SV *)cv); | |
2280 | return sv ? (sv) : (SV *)cv; | |
2281 | } | |
2282 | { | |
f3fb6cf3 | 2283 | SV * const retsv = sv ? (sv) : sv_newmortal(); |
c5569a55 FC |
2284 | if (SvTYPE(cv) == SVt_PVCV) { |
2285 | if (CvNAMED(cv)) { | |
ecf05a58 FC |
2286 | if (CvLEXICAL(cv) || flags & CV_NAME_NOTQUAL) |
2287 | sv_sethek(retsv, CvNAME_HEK(cv)); | |
c5569a55 FC |
2288 | else { |
2289 | sv_sethek(retsv, HvNAME_HEK(CvSTASH(cv))); | |
2290 | sv_catpvs(retsv, "::"); | |
f34d8cdd | 2291 | sv_cathek(retsv, CvNAME_HEK(cv)); |
c5569a55 FC |
2292 | } |
2293 | } | |
ecf05a58 | 2294 | else if (CvLEXICAL(cv) || flags & CV_NAME_NOTQUAL) |
c5569a55 FC |
2295 | sv_sethek(retsv, GvNAME_HEK(GvEGV(CvGV(cv)))); |
2296 | else gv_efullname3(retsv, CvGV(cv), NULL); | |
2297 | } | |
ecf05a58 | 2298 | else if (flags & CV_NAME_NOTQUAL) sv_sethek(retsv, GvNAME_HEK(cv)); |
c5569a55 FC |
2299 | else gv_efullname3(retsv,(GV *)cv,NULL); |
2300 | return retsv; | |
2301 | } | |
2302 | } | |
2303 | ||
dd2155a4 | 2304 | /* |
cc76b5cc | 2305 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2306 | |
2307 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
72d33970 | 2308 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
7dafbf52 | 2309 | moved to a pre-existing CV struct. |
dd2155a4 DM |
2310 | |
2311 | =cut | |
2312 | */ | |
2313 | ||
2314 | void | |
2315 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2316 | { | |
2317 | I32 ix; | |
9b7476d7 | 2318 | PADNAMELIST * const comppad_name = PadlistNAMES(padlist); |
86d2498c | 2319 | AV * const comppad = PadlistARRAY(padlist)[1]; |
0f94cb1f | 2320 | PADNAME ** const namepad = PadnamelistARRAY(comppad_name); |
53c1dcc0 | 2321 | SV ** const curpad = AvARRAY(comppad); |
7918f24d NC |
2322 | |
2323 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2324 | PERL_UNUSED_ARG(old_cv); |
2325 | ||
9b7476d7 | 2326 | for (ix = PadnamelistMAX(comppad_name); ix > 0; ix--) { |
0f94cb1f FC |
2327 | const PADNAME * const name = namepad[ix]; |
2328 | if (name && name != &PL_padname_undef && !PadnameIsSTATE(name) | |
2329 | && *PadnamePV(name) == '&') | |
dd2155a4 | 2330 | { |
e09ac076 | 2331 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
0f94cb1f FC |
2332 | /* XXX 0afba48f added code here to check for a proto CV |
2333 | attached to the pad entry by magic. But shortly there- | |
2334 | after 81df9f6f95 moved the magic to the pad name. The | |
2335 | code here was never updated, so it wasn’t doing anything | |
2336 | and got deleted when PADNAME became a distinct type. Is | |
2337 | there any bug as a result? */ | |
2338 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
0afba48f | 2339 | if (CvOUTSIDE(innercv) == old_cv) { |
1f122f9b FC |
2340 | if (!CvWEAKOUTSIDE(innercv)) { |
2341 | SvREFCNT_dec(old_cv); | |
2342 | SvREFCNT_inc_simple_void_NN(new_cv); | |
2343 | } | |
0afba48f FC |
2344 | CvOUTSIDE(innercv) = new_cv; |
2345 | } | |
e09ac076 FC |
2346 | } |
2347 | else { /* format reference */ | |
2348 | SV * const rv = curpad[ix]; | |
2349 | CV *innercv; | |
2350 | if (!SvOK(rv)) continue; | |
2351 | assert(SvROK(rv)); | |
2352 | assert(SvWEAKREF(rv)); | |
2353 | innercv = (CV *)SvRV(rv); | |
2354 | assert(!CvWEAKOUTSIDE(innercv)); | |
2355 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2356 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2357 | } | |
dd2155a4 DM |
2358 | } |
2359 | } | |
2360 | } | |
2361 | ||
2362 | /* | |
cc76b5cc | 2363 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2364 | |
2365 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2366 | this depth, in which case don't bother creating a new one. Then give |
2367 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2368 | |
2369 | =cut | |
2370 | */ | |
2371 | ||
2372 | void | |
26019298 | 2373 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2374 | { |
7918f24d NC |
2375 | PERL_ARGS_ASSERT_PAD_PUSH; |
2376 | ||
86d2498c FC |
2377 | if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) { |
2378 | PAD** const svp = PadlistARRAY(padlist); | |
44f8325f AL |
2379 | AV* const newpad = newAV(); |
2380 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 | 2381 | I32 ix = AvFILLp((const AV *)svp[1]); |
9b7476d7 | 2382 | const I32 names_fill = PadnamelistMAX((PADNAMELIST *)svp[0]); |
a2ddd1d1 | 2383 | PADNAME ** const names = PadnamelistARRAY((PADNAMELIST *)svp[0]); |
26019298 AL |
2384 | AV *av; |
2385 | ||
dd2155a4 | 2386 | for ( ;ix > 0; ix--) { |
325e1816 | 2387 | if (names_fill >= ix && PadnameLEN(names[ix])) { |
a2ddd1d1 FC |
2388 | const char sigil = PadnamePV(names[ix])[0]; |
2389 | if (PadnameOUTER(names[ix]) | |
2390 | || PadnameIsSTATE(names[ix]) | |
fda94784 RGS |
2391 | || sigil == '&') |
2392 | { | |
dd2155a4 DM |
2393 | /* outer lexical or anon code */ |
2394 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2395 | } | |
2396 | else { /* our own lexical */ | |
26019298 AL |
2397 | SV *sv; |
2398 | if (sigil == '@') | |
ad64d0ec | 2399 | sv = MUTABLE_SV(newAV()); |
26019298 | 2400 | else if (sigil == '%') |
ad64d0ec | 2401 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2402 | else |
561b68a9 | 2403 | sv = newSV(0); |
26019298 | 2404 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2405 | } |
2406 | } | |
778f1807 | 2407 | else if (PadnamePV(names[ix])) { |
f84c484e | 2408 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2409 | } |
2410 | else { | |
2411 | /* save temporaries on recursion? */ | |
561b68a9 | 2412 | SV * const sv = newSV(0); |
26019298 | 2413 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2414 | SvPADTMP_on(sv); |
2415 | } | |
2416 | } | |
26019298 | 2417 | av = newAV(); |
ad64d0ec | 2418 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2419 | AvREIFY_only(av); |
26019298 | 2420 | |
7261499d | 2421 | padlist_store(padlist, depth, newpad); |
dd2155a4 DM |
2422 | } |
2423 | } | |
b21dc031 | 2424 | |
d5b1589c NC |
2425 | #if defined(USE_ITHREADS) |
2426 | ||
2427 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2428 | ||
cc76b5cc | 2429 | /* |
b70d5558 | 2430 | =for apidoc padlist_dup |
cc76b5cc Z |
2431 | |
2432 | Duplicates a pad. | |
2433 | ||
2434 | =cut | |
2435 | */ | |
2436 | ||
b70d5558 FC |
2437 | PADLIST * |
2438 | Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param) | |
d5b1589c | 2439 | { |
7261499d FC |
2440 | PADLIST *dstpad; |
2441 | bool cloneall; | |
2442 | PADOFFSET max; | |
2443 | ||
d5b1589c NC |
2444 | PERL_ARGS_ASSERT_PADLIST_DUP; |
2445 | ||
71c165d4 | 2446 | cloneall = cBOOL(param->flags & CLONEf_COPY_STACKS); |
86d2498c | 2447 | assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1); |
7261499d | 2448 | |
86d2498c | 2449 | max = cloneall ? PadlistMAX(srcpad) : 1; |
7261499d FC |
2450 | |
2451 | Newx(dstpad, 1, PADLIST); | |
2452 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
86d2498c FC |
2453 | PadlistMAX(dstpad) = max; |
2454 | Newx(PadlistARRAY(dstpad), max + 1, PAD *); | |
7261499d | 2455 | |
9b7476d7 FC |
2456 | PadlistARRAY(dstpad)[0] = (PAD *) |
2457 | padnamelist_dup(PadlistNAMES(srcpad), param); | |
2458 | PadnamelistREFCNT(PadlistNAMES(dstpad))++; | |
7261499d FC |
2459 | if (cloneall) { |
2460 | PADOFFSET depth; | |
9b7476d7 | 2461 | for (depth = 1; depth <= max; ++depth) |
86d2498c FC |
2462 | PadlistARRAY(dstpad)[depth] = |
2463 | av_dup_inc(PadlistARRAY(srcpad)[depth], param); | |
6de654a5 NC |
2464 | } else { |
2465 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2466 | to build anything other than the first level of pads. */ | |
86d2498c | 2467 | I32 ix = AvFILLp(PadlistARRAY(srcpad)[1]); |
6de654a5 | 2468 | AV *pad1; |
9b7476d7 | 2469 | const I32 names_fill = PadnamelistMAX(PadlistNAMES(srcpad)); |
86d2498c | 2470 | const PAD *const srcpad1 = PadlistARRAY(srcpad)[1]; |
6de654a5 | 2471 | SV **oldpad = AvARRAY(srcpad1); |
3e020df5 | 2472 | PADNAME ** const names = PadnamelistARRAY(PadlistNAMES(dstpad)); |
6de654a5 NC |
2473 | SV **pad1a; |
2474 | AV *args; | |
6de654a5 | 2475 | |
6de654a5 NC |
2476 | pad1 = newAV(); |
2477 | ||
2478 | av_extend(pad1, ix); | |
86d2498c | 2479 | PadlistARRAY(dstpad)[1] = pad1; |
6de654a5 | 2480 | pad1a = AvARRAY(pad1); |
6de654a5 NC |
2481 | |
2482 | if (ix > -1) { | |
2483 | AvFILLp(pad1) = ix; | |
2484 | ||
2485 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2486 | if (!oldpad[ix]) { |
2487 | pad1a[ix] = NULL; | |
ce0d59fd FC |
2488 | } else if (names_fill >= ix && names[ix] && |
2489 | PadnameLEN(names[ix])) { | |
3e020df5 FC |
2490 | const char sigil = PadnamePV(names[ix])[0]; |
2491 | if (PadnameOUTER(names[ix]) | |
2492 | || PadnameIsSTATE(names[ix]) | |
05d04d9c NC |
2493 | || sigil == '&') |
2494 | { | |
2495 | /* outer lexical or anon code */ | |
2496 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2497 | } | |
2498 | else { /* our own lexical */ | |
adf8f095 NC |
2499 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2500 | /* This is a work around for how the current | |
2501 | implementation of ?{ } blocks in regexps | |
2502 | interacts with lexicals. */ | |
05d04d9c NC |
2503 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2504 | } else { | |
2505 | SV *sv; | |
2506 | ||
2507 | if (sigil == '@') | |
2508 | sv = MUTABLE_SV(newAV()); | |
2509 | else if (sigil == '%') | |
2510 | sv = MUTABLE_SV(newHV()); | |
2511 | else | |
2512 | sv = newSV(0); | |
2513 | pad1a[ix] = sv; | |
05d04d9c NC |
2514 | } |
2515 | } | |
2516 | } | |
92154801 | 2517 | else if (( names_fill >= ix && names[ix] |
ce0d59fd | 2518 | && PadnamePV(names[ix]) )) { |
05d04d9c NC |
2519 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2520 | } | |
2521 | else { | |
2522 | /* save temporaries on recursion? */ | |
2523 | SV * const sv = newSV(0); | |
2524 | pad1a[ix] = sv; | |
2525 | ||
2526 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2527 | FIXTHAT before merging this branch. | |
2528 | (And I know how to) */ | |
145bf8ee | 2529 | if (SvPADTMP(oldpad[ix])) |
05d04d9c NC |
2530 | SvPADTMP_on(sv); |
2531 | } | |
6de654a5 NC |
2532 | } |
2533 | ||
2534 | if (oldpad[0]) { | |
2535 | args = newAV(); /* Will be @_ */ | |
2536 | AvREIFY_only(args); | |
2537 | pad1a[0] = (SV *)args; | |
2538 | } | |
2539 | } | |
2540 | } | |
d5b1589c NC |
2541 | |
2542 | return dstpad; | |
2543 | } | |
2544 | ||
cc76b5cc | 2545 | #endif /* USE_ITHREADS */ |
d5b1589c | 2546 | |
7261499d | 2547 | PAD ** |
5aaab254 | 2548 | Perl_padlist_store(pTHX_ PADLIST *padlist, I32 key, PAD *val) |
7261499d | 2549 | { |
7261499d | 2550 | PAD **ary; |
86d2498c | 2551 | SSize_t const oldmax = PadlistMAX(padlist); |
7261499d FC |
2552 | |
2553 | PERL_ARGS_ASSERT_PADLIST_STORE; | |
2554 | ||
2555 | assert(key >= 0); | |
2556 | ||
86d2498c FC |
2557 | if (key > PadlistMAX(padlist)) { |
2558 | av_extend_guts(NULL,key,&PadlistMAX(padlist), | |
2559 | (SV ***)&PadlistARRAY(padlist), | |
2560 | (SV ***)&PadlistARRAY(padlist)); | |
2561 | Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax, | |
7261499d FC |
2562 | PAD *); |
2563 | } | |
86d2498c | 2564 | ary = PadlistARRAY(padlist); |
7261499d FC |
2565 | SvREFCNT_dec(ary[key]); |
2566 | ary[key] = val; | |
2567 | return &ary[key]; | |
2568 | } | |
2569 | ||
66610fdd | 2570 | /* |
9b7476d7 FC |
2571 | =for apidoc newPADNAMELIST |
2572 | ||
2573 | Creates a new pad name list. C<max> is the highest index for which space | |
2574 | is allocated. | |
2575 | ||
2576 | =cut | |
2577 | */ | |
2578 | ||
2579 | PADNAMELIST * | |
2580 | Perl_newPADNAMELIST(pTHX_ size_t max) | |
2581 | { | |
2582 | PADNAMELIST *pnl; | |
2583 | Newx(pnl, 1, PADNAMELIST); | |
2584 | Newxz(PadnamelistARRAY(pnl), max+1, PADNAME *); | |
2585 | PadnamelistMAX(pnl) = -1; | |
2586 | PadnamelistREFCNT(pnl) = 1; | |
2587 | PadnamelistMAXNAMED(pnl) = 0; | |
2588 | pnl->xpadnl_max = max; | |
2589 | return pnl; | |
2590 | } | |
2591 | ||
2592 | /* | |
2593 | =for apidoc padnamelist_store | |
2594 | ||
2595 | Stores the pad name (which may be null) at the given index, freeing any | |
2596 | existing pad name in that slot. | |
2597 | ||
2598 | =cut | |
2599 | */ | |
2600 | ||
2601 | PADNAME ** | |
2602 | Perl_padnamelist_store(pTHX_ PADNAMELIST *pnl, SSize_t key, PADNAME *val) | |
2603 | { | |
2604 | PADNAME **ary; | |
2605 | ||
2606 | PERL_ARGS_ASSERT_PADNAMELIST_STORE; | |
2607 | ||
2608 | assert(key >= 0); | |
2609 | ||
2610 | if (key > pnl->xpadnl_max) | |
2611 | av_extend_guts(NULL,key,&pnl->xpadnl_max, | |
2612 | (SV ***)&PadnamelistARRAY(pnl), | |
2613 | (SV ***)&PadnamelistARRAY(pnl)); | |
2614 | if (PadnamelistMAX(pnl) < key) { | |
2615 | Zero(PadnamelistARRAY(pnl)+PadnamelistMAX(pnl)+1, | |
2616 | key-PadnamelistMAX(pnl), PADNAME *); | |
2617 | PadnamelistMAX(pnl) = key; | |
2618 | } | |
2619 | ary = PadnamelistARRAY(pnl); | |
0f94cb1f FC |
2620 | if (ary[key]) |
2621 | PadnameREFCNT_dec(ary[key]); | |
9b7476d7 FC |
2622 | ary[key] = val; |
2623 | return &ary[key]; | |
2624 | } | |
2625 | ||
2626 | /* | |
2627 | =for apidoc padnamelist_fetch | |
2628 | ||
2629 | Fetches the pad name from the given index. | |
2630 | ||
2631 | =cut | |
2632 | */ | |
2633 | ||
2634 | PADNAME * | |
2635 | Perl_padnamelist_fetch(pTHX_ PADNAMELIST *pnl, SSize_t key) | |
2636 | { | |
2637 | PERL_ARGS_ASSERT_PADNAMELIST_FETCH; | |
2638 | ASSUME(key >= 0); | |
2639 | ||
2640 | return key > PadnamelistMAX(pnl) ? NULL : PadnamelistARRAY(pnl)[key]; | |
2641 | } | |
2642 | ||
2643 | void | |
2644 | Perl_padnamelist_free(pTHX_ PADNAMELIST *pnl) | |
2645 | { | |
2646 | PERL_ARGS_ASSERT_PADNAMELIST_FREE; | |
2647 | if (!--PadnamelistREFCNT(pnl)) { | |
2648 | while(PadnamelistMAX(pnl) >= 0) | |
0f94cb1f FC |
2649 | { |
2650 | PADNAME * const pn = | |
2651 | PadnamelistARRAY(pnl)[PadnamelistMAX(pnl)--]; | |
2652 | if (pn) | |
2653 | PadnameREFCNT_dec(pn); | |
2654 | } | |
9b7476d7 FC |
2655 | Safefree(PadnamelistARRAY(pnl)); |
2656 | Safefree(pnl); | |
2657 | } | |
2658 | } | |
2659 | ||
2660 | #if defined(USE_ITHREADS) | |
2661 | ||
2662 | /* | |
2663 | =for apidoc padnamelist_dup | |
2664 | ||
2665 | Duplicates a pad name list. | |
2666 | ||
2667 | =cut | |
2668 | */ | |
2669 | ||
2670 | PADNAMELIST * | |
2671 | Perl_padnamelist_dup(pTHX_ PADNAMELIST *srcpad, CLONE_PARAMS *param) | |
2672 | { | |
2673 | PADNAMELIST *dstpad; | |
2674 | SSize_t max = PadnamelistMAX(srcpad); | |
2675 | ||
2676 | PERL_ARGS_ASSERT_PADNAMELIST_DUP; | |
2677 | ||
2678 | /* look for it in the table first */ | |
2679 | dstpad = (PADNAMELIST *)ptr_table_fetch(PL_ptr_table, srcpad); | |
2680 | if (dstpad) | |
2681 | return dstpad; | |
2682 | ||
2683 | dstpad = newPADNAMELIST(max); | |
2684 | PadnamelistREFCNT(dstpad) = 0; /* The caller will increment it. */ | |
2685 | PadnamelistMAXNAMED(dstpad) = PadnamelistMAXNAMED(srcpad); | |
2686 | PadnamelistMAX(dstpad) = max; | |
2687 | ||
2688 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
2689 | for (; max >= 0; max--) | |
0f94cb1f | 2690 | if (PadnamelistARRAY(srcpad)[max]) { |
9b7476d7 | 2691 | PadnamelistARRAY(dstpad)[max] = |
0f94cb1f FC |
2692 | padname_dup(PadnamelistARRAY(srcpad)[max], param); |
2693 | PadnameREFCNT(PadnamelistARRAY(dstpad)[max])++; | |
2694 | } | |
9b7476d7 FC |
2695 | |
2696 | return dstpad; | |
2697 | } | |
2698 | ||
2699 | #endif /* USE_ITHREADS */ | |
2700 | ||
0f94cb1f FC |
2701 | /* |
2702 | =for apidoc newPADNAMEpvn | |
2703 | ||
2704 | Constructs and returns a new pad name. I<s> must be a UTF8 string. Do not | |
2705 | use this for pad names that point to outer lexicals. See | |
2706 | L</newPADNAMEouter>. | |
2707 | ||
2708 | =cut | |
2709 | */ | |
2710 | ||
2711 | PADNAME * | |
2712 | Perl_newPADNAMEpvn(pTHX_ const char *s, STRLEN len) | |
2713 | { | |
2714 | struct padname_with_str *alloc; | |
2715 | char *alloc2; /* for Newxz */ | |
2716 | PADNAME *pn; | |
2717 | PERL_ARGS_ASSERT_NEWPADNAMEPVN; | |
2718 | Newxz(alloc2, | |
2719 | STRUCT_OFFSET(struct padname_with_str, xpadn_str[0]) + len + 1, | |
2720 | char); | |
2721 | alloc = (struct padname_with_str *)alloc2; | |
2722 | pn = (PADNAME *)alloc; | |
2723 | PadnameREFCNT(pn) = 1; | |
2724 | PadnamePV(pn) = alloc->xpadn_str; | |
2725 | Copy(s, PadnamePV(pn), len, char); | |
2726 | *(PadnamePV(pn) + len) = '\0'; | |
2727 | PadnameLEN(pn) = len; | |
2728 | return pn; | |
2729 | } | |
2730 | ||
2731 | /* | |
2732 | =for apidoc newPADNAMEouter | |
2733 | ||
2734 | Constructs and returns a new pad name. Only use this function for names | |
2735 | that refer to outer lexicals. (See also L</newPADNAMEpvn>.) I<outer> is | |
2736 | the outer pad name that this one mirrors. The returned pad name has the | |
2737 | PADNAMEt_OUTER flag already set. | |
2738 | ||
2739 | =cut | |
2740 | */ | |
2741 | ||
2742 | PADNAME * | |
2743 | Perl_newPADNAMEouter(pTHX_ PADNAME *outer) | |
2744 | { | |
2745 | PADNAME *pn; | |
2746 | PERL_ARGS_ASSERT_NEWPADNAMEOUTER; | |
2747 | Newxz(pn, 1, PADNAME); | |
2748 | PadnameREFCNT(pn) = 1; | |
2749 | PadnamePV(pn) = PadnamePV(outer); | |
2750 | /* Not PadnameREFCNT(outer), because ‘outer’ may itself close over | |
2751 | another entry. The original pad name owns the buffer. */ | |
2752 | PadnameREFCNT(PADNAME_FROM_PV(PadnamePV(outer)))++; | |
2753 | PadnameFLAGS(pn) = PADNAMEt_OUTER; | |
2754 | PadnameLEN(pn) = PadnameLEN(outer); | |
2755 | return pn; | |
2756 | } | |
2757 | ||
2758 | void | |
2759 | Perl_padname_free(pTHX_ PADNAME *pn) | |
2760 | { | |
2761 | PERL_ARGS_ASSERT_PADNAME_FREE; | |
2762 | if (!--PadnameREFCNT(pn)) { | |
2763 | if (UNLIKELY(pn == &PL_padname_undef || pn == &PL_padname_const)) { | |
2764 | PadnameREFCNT(pn) = SvREFCNT_IMMORTAL; | |
2765 | return; | |
2766 | } | |
2767 | SvREFCNT_dec(PadnameTYPE(pn)); /* Takes care of protocv, too. */ | |
2768 | SvREFCNT_dec(PadnameOURSTASH(pn)); | |
2769 | if (PadnameOUTER(pn)) | |
2770 | PadnameREFCNT_dec(PADNAME_FROM_PV(PadnamePV(pn))); | |
2771 | Safefree(pn); | |
2772 | } | |
2773 | } | |
2774 | ||
2775 | #if defined(USE_ITHREADS) | |
2776 | ||
2777 | /* | |
2778 | =for apidoc padname_dup | |
2779 | ||
2780 | Duplicates a pad name. | |
2781 | ||
2782 | =cut | |
2783 | */ | |
2784 | ||
2785 | PADNAME * | |
2786 | Perl_padname_dup(pTHX_ PADNAME *src, CLONE_PARAMS *param) | |
2787 | { | |
2788 | PADNAME *dst; | |
2789 | ||
2790 | PERL_ARGS_ASSERT_PADNAME_DUP; | |
2791 | ||
2792 | /* look for it in the table first */ | |
2793 | dst = (PADNAME *)ptr_table_fetch(PL_ptr_table, src); | |
2794 | if (dst) | |
2795 | return dst; | |
2796 | ||
2797 | if (!PadnamePV(src)) { | |
2798 | dst = &PL_padname_undef; | |
2799 | ptr_table_store(PL_ptr_table, src, dst); | |
2800 | return dst; | |
2801 | } | |
2802 | ||
2803 | dst = PadnameOUTER(src) | |
2804 | ? newPADNAMEouter(padname_dup(PADNAME_FROM_PV(PadnamePV(src)), param)) | |
2805 | : newPADNAMEpvn(PadnamePV(src), PadnameLEN(src)); | |
2806 | ptr_table_store(PL_ptr_table, src, dst); | |
2807 | PadnameLEN(dst) = PadnameLEN(src); | |
2808 | PadnameFLAGS(dst) = PadnameFLAGS(src); | |
2809 | PadnameREFCNT(dst) = 0; /* The caller will increment it. */ | |
2810 | PadnameTYPE (dst) = (HV *)sv_dup_inc((SV *)PadnameTYPE(src), param); | |
2811 | PadnameOURSTASH(dst) = (HV *)sv_dup_inc((SV *)PadnameOURSTASH(src), | |
2812 | param); | |
2813 | dst->xpadn_low = src->xpadn_low; | |
2814 | dst->xpadn_high = src->xpadn_high; | |
2815 | dst->xpadn_gen = src->xpadn_gen; | |
2816 | return dst; | |
2817 | } | |
2818 | ||
2819 | #endif /* USE_ITHREADS */ | |
9b7476d7 FC |
2820 | |
2821 | /* | |
66610fdd RGS |
2822 | * Local variables: |
2823 | * c-indentation-style: bsd | |
2824 | * c-basic-offset: 4 | |
14d04a33 | 2825 | * indent-tabs-mode: nil |
66610fdd RGS |
2826 | * End: |
2827 | * | |
14d04a33 | 2828 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2829 | */ |