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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 DM |
40 | |
41 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
42 | but that is really the callers pad (a slot of which is allocated by | |
43 | every entersub). | |
44 | ||
58a9b2fe | 45 | The PADLIST has a C array where pads are stored. |
dd2155a4 | 46 | |
58a9b2fe FC |
47 | The 0th entry of the PADLIST is a PADNAMELIST (which is actually just an |
48 | AV, but that may change) which represents the "names" or rather | |
49 | the "static type information" for lexicals. The individual elements of a | |
7a5eb04d FC |
50 | PADNAMELIST are PADNAMEs (just SVs; but, again, that may change). Future |
51 | refactorings might stop the PADNAMELIST from being stored in the PADLIST's | |
86d2498c | 52 | array, so don't rely on it. See L</PadlistNAMES>. |
dd2155a4 | 53 | |
58a9b2fe FC |
54 | The CvDEPTH'th entry of a PADLIST is a PAD (an AV) which is the stack frame |
55 | at that depth of recursion into the CV. The 0th slot of a frame AV is an | |
56 | AV which is @_. Other entries are storage for variables and op targets. | |
dd2155a4 | 57 | |
58a9b2fe | 58 | Iterating over the PADNAMELIST iterates over all possible pad |
272ce8bb FC |
59 | items. Pad slots for targets (SVs_PADTMP) |
60 | and GVs end up having &PL_sv_undef | |
325e1816 | 61 | "names", while slots for constants have &PL_sv_no "names" (see |
fb090176 FC |
62 | pad_alloc()). That &PL_sv_no is used is an implementation detail subject |
63 | to change. To test for it, use C<PadnamePV(name) && !PadnameLEN(name)>. | |
dd2155a4 | 64 | |
58a9b2fe | 65 | Only my/our variable (SvPADMY/PADNAME_isOUR) slots get valid names. |
dd2155a4 DM |
66 | The rest are op targets/GVs/constants which are statically allocated |
67 | or resolved at compile time. These don't have names by which they | |
58a9b2fe | 68 | can be looked up from Perl code at run time through eval"" the way |
dd2155a4 DM |
69 | my/our variables can be. Since they can't be looked up by "name" |
70 | but only by their index allocated at compile time (which is usually | |
71 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
72 | ||
73 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 74 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
75 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
76 | _HIGH). During compilation, these fields may hold the special value | |
77 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
78 | |
79 | COP_SEQ_RANGE_LOW _HIGH | |
80 | ----------------- ----- | |
81 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
82 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
83 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
84 | ||
85 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 86 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 87 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 88 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 89 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 90 | |
c44737a2 FC |
91 | If PADNAME_OUTER (SvFAKE) is set on the |
92 | name SV, then that slot in the frame AV is | |
72d33970 | 93 | a REFCNT'ed reference to a lexical from "outside". In this case, |
3441fb63 | 94 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
72d33970 | 95 | in scope throughout. Instead xhigh stores some flags containing info about |
b5c19bd7 | 96 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 97 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
98 | within the parent's pad where the lexical's value is stored, to make |
99 | cloning quicker. | |
dd2155a4 | 100 | |
58a9b2fe | 101 | If the 'name' is '&' the corresponding entry in the PAD |
dd2155a4 | 102 | is a CV representing a possible closure. |
c44737a2 FC |
103 | (PADNAME_OUTER and name of '&' is not a |
104 | meaningful combination currently but could | |
dd2155a4 DM |
105 | become so if C<my sub foo {}> is implemented.) |
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 | ||
58a9b2fe | 117 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised'. |
d1186544 | 118 | |
36c300bb | 119 | =for apidoc AmxU|PADNAMELIST *|PL_comppad_name |
cc76b5cc Z |
120 | |
121 | During compilation, this points to the array containing the names part | |
122 | of the pad for the currently-compiling code. | |
123 | ||
36c300bb | 124 | =for apidoc AmxU|PAD *|PL_comppad |
cc76b5cc Z |
125 | |
126 | During compilation, this points to the array containing the values | |
127 | part of the pad for the currently-compiling code. (At runtime a CV may | |
128 | have many such value arrays; at compile time just one is constructed.) | |
129 | At runtime, this points to the array containing the currently-relevant | |
130 | values for the pad for the currently-executing code. | |
131 | ||
132 | =for apidoc AmxU|SV **|PL_curpad | |
133 | ||
134 | Points directly to the body of the L</PL_comppad> array. | |
c14a2249 | 135 | (I.e., this is C<PAD_ARRAY(PL_comppad)>.) |
cc76b5cc | 136 | |
dd2155a4 DM |
137 | =cut |
138 | */ | |
139 | ||
140 | ||
141 | #include "EXTERN.h" | |
142 | #define PERL_IN_PAD_C | |
143 | #include "perl.h" | |
952306ac | 144 | #include "keywords.h" |
dd2155a4 | 145 | |
3441fb63 NC |
146 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
147 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
148 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
149 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 150 | |
3441fb63 NC |
151 | #define PARENT_PAD_INDEX_set(sv,val) \ |
152 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
153 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
154 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 155 | |
cc76b5cc | 156 | /* |
5b16296c BF |
157 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
158 | and bytes checking. | |
159 | */ | |
160 | ||
76d60a53 NC |
161 | static bool |
162 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
163 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
164 | const char *pv1 = SvPVX_const(sv); | |
165 | STRLEN cur1 = SvCUR(sv); | |
166 | const char *pv2 = pv; | |
167 | STRLEN cur2 = pvlen; | |
168 | if (PL_encoding) { | |
169 | SV* svrecode = NULL; | |
170 | if (SvUTF8(sv)) { | |
171 | svrecode = newSVpvn(pv2, cur2); | |
172 | sv_recode_to_utf8(svrecode, PL_encoding); | |
173 | pv2 = SvPV_const(svrecode, cur2); | |
174 | } | |
175 | else { | |
176 | svrecode = newSVpvn(pv1, cur1); | |
177 | sv_recode_to_utf8(svrecode, PL_encoding); | |
178 | pv1 = SvPV_const(svrecode, cur1); | |
179 | } | |
fc2b2dca | 180 | SvREFCNT_dec_NN(svrecode); |
5b16296c BF |
181 | } |
182 | if (flags & SVf_UTF8) | |
183 | return (bytes_cmp_utf8( | |
184 | (const U8*)pv1, cur1, | |
185 | (const U8*)pv2, cur2) == 0); | |
186 | else | |
187 | return (bytes_cmp_utf8( | |
188 | (const U8*)pv2, cur2, | |
189 | (const U8*)pv1, cur1) == 0); | |
190 | } | |
191 | else | |
192 | return ((SvPVX_const(sv) == pv) | |
193 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
194 | } | |
195 | ||
196 | ||
197 | /* | |
cc76b5cc | 198 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 199 | |
cc76b5cc Z |
200 | Create a new padlist, updating the global variables for the |
201 | currently-compiling padlist to point to the new padlist. The following | |
202 | flags can be OR'ed together: | |
dd2155a4 DM |
203 | |
204 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 205 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
206 | padnew_SAVESUB also save extra stuff for start of sub |
207 | ||
208 | =cut | |
209 | */ | |
210 | ||
211 | PADLIST * | |
c7c737cb | 212 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 213 | { |
7261499d FC |
214 | PADLIST *padlist; |
215 | PAD *padname, *pad; | |
216 | PAD **ary; | |
dd2155a4 | 217 | |
f3548bdc DM |
218 | ASSERT_CURPAD_LEGAL("pad_new"); |
219 | ||
dd2155a4 DM |
220 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
221 | * vars (based on flags) rather than storing vals + addresses for | |
222 | * each individually. Also see pad_block_start. | |
223 | * XXX DAPM Try to see whether all these conditionals are required | |
224 | */ | |
225 | ||
226 | /* save existing state, ... */ | |
227 | ||
228 | if (flags & padnew_SAVE) { | |
3979c56f | 229 | SAVECOMPPAD(); |
dd2155a4 | 230 | if (! (flags & padnew_CLONE)) { |
cbacc9aa | 231 | SAVESPTR(PL_comppad_name); |
dd2155a4 | 232 | SAVEI32(PL_padix); |
b54c5e14 | 233 | SAVEI32(PL_constpadix); |
dd2155a4 DM |
234 | SAVEI32(PL_comppad_name_fill); |
235 | SAVEI32(PL_min_intro_pending); | |
236 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 237 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 238 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 239 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
240 | } |
241 | } | |
242 | } | |
243 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
244 | * saved - check at some pt that this is okay */ | |
245 | ||
246 | /* ... create new pad ... */ | |
247 | ||
7261499d | 248 | Newxz(padlist, 1, PADLIST); |
dd2155a4 DM |
249 | pad = newAV(); |
250 | ||
251 | if (flags & padnew_CLONE) { | |
252 | /* XXX DAPM I dont know why cv_clone needs it | |
253 | * doing differently yet - perhaps this separate branch can be | |
254 | * dispensed with eventually ??? | |
255 | */ | |
256 | ||
e1ec3a88 | 257 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 258 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 259 | AvREIFY_only(a0); |
9ef8d569 FC |
260 | |
261 | padname = (PAD *)SvREFCNT_inc_simple_NN(PL_comppad_name); | |
dd2155a4 DM |
262 | } |
263 | else { | |
a0714e2c | 264 | av_store(pad, 0, NULL); |
9ef8d569 | 265 | padname = newAV(); |
7db6405c | 266 | AvPAD_NAMELIST_on(padname); |
ce0d59fd | 267 | av_store(padname, 0, &PL_sv_undef); |
dd2155a4 DM |
268 | } |
269 | ||
7a6072a8 NC |
270 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
271 | array - names, and depth=1. The default for av_store() is to allocate | |
272 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
273 | up, so we inline the allocation of the array here. */ | |
7261499d | 274 | Newx(ary, 2, PAD *); |
86d2498c FC |
275 | PadlistMAX(padlist) = 1; |
276 | PadlistARRAY(padlist) = ary; | |
7261499d FC |
277 | ary[0] = padname; |
278 | ary[1] = pad; | |
dd2155a4 DM |
279 | |
280 | /* ... then update state variables */ | |
281 | ||
403799bf NC |
282 | PL_comppad = pad; |
283 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
284 | |
285 | if (! (flags & padnew_CLONE)) { | |
9ef8d569 | 286 | PL_comppad_name = padname; |
dd2155a4 DM |
287 | PL_comppad_name_fill = 0; |
288 | PL_min_intro_pending = 0; | |
289 | PL_padix = 0; | |
b54c5e14 | 290 | PL_constpadix = 0; |
b5c19bd7 | 291 | PL_cv_has_eval = 0; |
dd2155a4 DM |
292 | } |
293 | ||
294 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 295 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 296 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 297 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
298 | PTR2UV(padname), (UV)flags |
299 | ) | |
300 | ); | |
301 | ||
302 | return (PADLIST*)padlist; | |
303 | } | |
304 | ||
dd2155a4 | 305 | |
c4528262 NC |
306 | /* |
307 | =head1 Embedding Functions | |
308 | ||
309 | =for apidoc cv_undef | |
310 | ||
72d33970 | 311 | Clear out all the active components of a CV. This can happen either |
c4528262 NC |
312 | by an explicit C<undef &foo>, or by the reference count going to zero. |
313 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
314 | children can still follow the full lexical scope chain. | |
315 | ||
316 | =cut | |
317 | */ | |
318 | ||
319 | void | |
320 | Perl_cv_undef(pTHX_ CV *cv) | |
321 | { | |
c2736fce | 322 | const PADLIST *padlist = CvPADLIST(cv); |
8be227ab | 323 | bool const slabbed = !!CvSLABBED(cv); |
c4528262 NC |
324 | |
325 | PERL_ARGS_ASSERT_CV_UNDEF; | |
326 | ||
327 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
328 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
329 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
330 | ); | |
331 | ||
bad4ae38 | 332 | if (CvFILE(cv) && CvDYNFILE(cv)) { |
c4528262 NC |
333 | Safefree(CvFILE(cv)); |
334 | } | |
335 | CvFILE(cv) = NULL; | |
dd2155a4 | 336 | |
8be227ab | 337 | CvSLABBED_off(cv); |
c4528262 NC |
338 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
339 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
340 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
341 | ENTER; | |
342 | ||
343 | PAD_SAVE_SETNULLPAD(); | |
344 | ||
8be227ab | 345 | if (slabbed) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(cv))); |
c4528262 NC |
346 | op_free(CvROOT(cv)); |
347 | CvROOT(cv) = NULL; | |
348 | CvSTART(cv) = NULL; | |
349 | LEAVE; | |
350 | } | |
8be227ab FC |
351 | else if (slabbed && CvSTART(cv)) { |
352 | ENTER; | |
353 | PAD_SAVE_SETNULLPAD(); | |
354 | ||
355 | /* discard any leaked ops */ | |
3ac7ff8f FC |
356 | if (PL_parser) |
357 | parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(cv)); | |
8be227ab FC |
358 | opslab_force_free((OPSLAB *)CvSTART(cv)); |
359 | CvSTART(cv) = NULL; | |
360 | ||
361 | LEAVE; | |
362 | } | |
7aef8e5b | 363 | #ifdef DEBUGGING |
eb212a1c | 364 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
8be227ab | 365 | #endif |
c4528262 | 366 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 367 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
2e800d79 | 368 | if (CvNAMED(cv)) CvNAME_HEK_set(cv, NULL); |
b290562e | 369 | else CvGV_set(cv, NULL); |
c4528262 | 370 | |
c2736fce NC |
371 | /* This statement and the subsequence if block was pad_undef(). */ |
372 | pad_peg("pad_undef"); | |
373 | ||
7261499d | 374 | if (padlist) { |
c2736fce NC |
375 | I32 ix; |
376 | ||
377 | /* Free the padlist associated with a CV. | |
378 | If parts of it happen to be current, we null the relevant PL_*pad* | |
379 | global vars so that we don't have any dangling references left. | |
380 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
381 | subs to the outer of this cv. */ | |
382 | ||
383 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
384 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
385 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
386 | ); | |
387 | ||
388 | /* detach any '&' anon children in the pad; if afterwards they | |
389 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
390 | * bypassing us. */ | |
391 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
392 | * children, or integrate this loop with general cleanup */ | |
393 | ||
394 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
395 | CV * const outercv = CvOUTSIDE(cv); | |
396 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
86d2498c | 397 | PAD * const comppad_name = PadlistARRAY(padlist)[0]; |
c2736fce | 398 | SV ** const namepad = AvARRAY(comppad_name); |
86d2498c | 399 | PAD * const comppad = PadlistARRAY(padlist)[1]; |
c2736fce NC |
400 | SV ** const curpad = AvARRAY(comppad); |
401 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
402 | SV * const namesv = namepad[ix]; | |
403 | if (namesv && namesv != &PL_sv_undef | |
404 | && *SvPVX_const(namesv) == '&') | |
405 | { | |
406 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
407 | U32 inner_rc = SvREFCNT(innercv); | |
408 | assert(inner_rc); | |
e09ac076 | 409 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
410 | |
411 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
412 | curpad[ix] = NULL; | |
fc2b2dca | 413 | SvREFCNT_dec_NN(innercv); |
c2736fce NC |
414 | inner_rc--; |
415 | } | |
416 | ||
417 | /* in use, not just a prototype */ | |
418 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
419 | assert(CvWEAKOUTSIDE(innercv)); | |
420 | /* don't relink to grandfather if he's being freed */ | |
421 | if (outercv && SvREFCNT(outercv)) { | |
422 | CvWEAKOUTSIDE_off(innercv); | |
423 | CvOUTSIDE(innercv) = outercv; | |
424 | CvOUTSIDE_SEQ(innercv) = seq; | |
425 | SvREFCNT_inc_simple_void_NN(outercv); | |
426 | } | |
427 | else { | |
428 | CvOUTSIDE(innercv) = NULL; | |
429 | } | |
430 | } | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
86d2498c | 435 | ix = PadlistMAX(padlist); |
aa2f79cf | 436 | while (ix > 0) { |
86d2498c | 437 | PAD * const sv = PadlistARRAY(padlist)[ix--]; |
c2736fce | 438 | if (sv) { |
7261499d | 439 | if (sv == PL_comppad) { |
c2736fce NC |
440 | PL_comppad = NULL; |
441 | PL_curpad = NULL; | |
442 | } | |
fc2b2dca | 443 | SvREFCNT_dec_NN(sv); |
c2736fce | 444 | } |
aa2f79cf NC |
445 | } |
446 | { | |
86d2498c | 447 | PAD * const sv = PadlistARRAY(padlist)[0]; |
9ef8d569 | 448 | if (sv == PL_comppad_name && SvREFCNT(sv) == 1) |
aa2f79cf | 449 | PL_comppad_name = NULL; |
c2736fce NC |
450 | SvREFCNT_dec(sv); |
451 | } | |
86d2498c | 452 | if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist)); |
7261499d | 453 | Safefree(padlist); |
c2736fce NC |
454 | CvPADLIST(cv) = NULL; |
455 | } | |
456 | ||
c4528262 NC |
457 | |
458 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
459 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
460 | if (!CvWEAKOUTSIDE(cv)) | |
461 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
462 | CvOUTSIDE(cv) = NULL; | |
463 | } | |
464 | if (CvCONST(cv)) { | |
465 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
466 | CvCONST_off(cv); | |
467 | } | |
468 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
469 | CvXSUB(cv) = NULL; | |
470 | } | |
471 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
2c374370 FC |
472 | * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses |
473 | * to choose an error message */ | |
474 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON); | |
c4528262 | 475 | } |
dd2155a4 | 476 | |
50dc2bd3 FC |
477 | /* |
478 | =for apidoc cv_forget_slab | |
479 | ||
480 | When a CV has a reference count on its slab (CvSLABBED), it is responsible | |
481 | for making sure it is freed. (Hence, no two CVs should ever have a | |
482 | reference count on the same slab.) The CV only needs to reference the slab | |
483 | during compilation. Once it is compiled and CvROOT attached, it has | |
484 | finished its job, so it can forget the slab. | |
485 | ||
486 | =cut | |
487 | */ | |
488 | ||
8be227ab FC |
489 | void |
490 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
491 | { | |
492 | const bool slabbed = !!CvSLABBED(cv); | |
3107b51f | 493 | OPSLAB *slab = NULL; |
8be227ab FC |
494 | |
495 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
496 | ||
497 | if (!slabbed) return; | |
498 | ||
499 | CvSLABBED_off(cv); | |
500 | ||
3107b51f FC |
501 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
502 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 503 | #ifdef DEBUGGING |
eb212a1c | 504 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
7aef8e5b | 505 | #endif |
3107b51f | 506 | |
3107b51f | 507 | if (slab) { |
f3e29105 NC |
508 | #ifdef PERL_DEBUG_READONLY_OPS |
509 | const size_t refcnt = slab->opslab_refcnt; | |
510 | #endif | |
3107b51f | 511 | OpslabREFCNT_dec(slab); |
f3e29105 | 512 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 513 | if (refcnt > 1) Slab_to_ro(slab); |
8be227ab | 514 | #endif |
f3e29105 | 515 | } |
7aef8e5b | 516 | } |
8be227ab | 517 | |
cc76b5cc Z |
518 | /* |
519 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
520 | ||
1a115e49 FC |
521 | Allocates a place in the currently-compiling |
522 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
523 | then stores a name for that entry. I<namesv> is adopted and becomes the |
524 | name entry; it must already contain the name string and be sufficiently | |
525 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
526 | added to I<namesv>. None of the other |
527 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
528 | is done. Returns the offset of the allocated pad slot. |
529 | ||
530 | =cut | |
531 | */ | |
532 | ||
3291825f | 533 | static PADOFFSET |
cc76b5cc | 534 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f | 535 | { |
3291825f NC |
536 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
537 | ||
cc76b5cc | 538 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 539 | |
cc76b5cc | 540 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
541 | |
542 | if (typestash) { | |
543 | assert(SvTYPE(namesv) == SVt_PVMG); | |
544 | SvPAD_TYPED_on(namesv); | |
545 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
546 | } | |
547 | if (ourstash) { | |
548 | SvPAD_OUR_on(namesv); | |
549 | SvOURSTASH_set(namesv, ourstash); | |
550 | SvREFCNT_inc_simple_void_NN(ourstash); | |
551 | } | |
59cfed7d | 552 | else if (flags & padadd_STATE) { |
3291825f NC |
553 | SvPAD_STATE_on(namesv); |
554 | } | |
555 | ||
556 | av_store(PL_comppad_name, offset, namesv); | |
7db6405c | 557 | PadnamelistMAXNAMED(PL_comppad_name) = offset; |
3291825f NC |
558 | return offset; |
559 | } | |
560 | ||
dd2155a4 | 561 | /* |
cc76b5cc | 562 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 563 | |
cc76b5cc Z |
564 | Allocates a place in the currently-compiling pad for a named lexical |
565 | variable. Stores the name and other metadata in the name part of the | |
566 | pad, and makes preparations to manage the variable's lexical scoping. | |
567 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 568 | |
cc76b5cc Z |
569 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
570 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
571 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
572 | to a package variable, and this identifies the package. The following | |
573 | flags can be OR'ed together: | |
574 | ||
575 | padadd_OUR redundantly specifies if it's a package var | |
576 | padadd_STATE variable will retain value persistently | |
577 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
578 | |
579 | =cut | |
580 | */ | |
581 | ||
dd2155a4 | 582 | PADOFFSET |
cc76b5cc Z |
583 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
584 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 585 | { |
3291825f | 586 | PADOFFSET offset; |
cca43f78 | 587 | SV *namesv; |
e8b34487 | 588 | bool is_utf8; |
dd2155a4 | 589 | |
cc76b5cc | 590 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 591 | |
2435e5d3 | 592 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 593 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
594 | (UV)flags); |
595 | ||
596 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
597 | |
598 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
599 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
600 | } | |
601 | ||
0727928e BF |
602 | sv_setpvn(namesv, namepv, namelen); |
603 | ||
e8b34487 BF |
604 | if (is_utf8) { |
605 | flags |= padadd_UTF8_NAME; | |
606 | SvUTF8_on(namesv); | |
607 | } | |
608 | else | |
609 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 610 | |
59cfed7d | 611 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
c2b36a6d FC |
612 | ENTER; |
613 | SAVEFREESV(namesv); /* in case of fatal warnings */ | |
2d12d04f | 614 | /* check for duplicate declaration */ |
59cfed7d | 615 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
c2b36a6d FC |
616 | SvREFCNT_inc_simple_void_NN(namesv); |
617 | LEAVE; | |
2d12d04f NC |
618 | } |
619 | ||
2435e5d3 | 620 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
621 | |
622 | /* not yet introduced */ | |
2df5bdd7 DM |
623 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
624 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
625 | |
626 | if (!PL_min_intro_pending) | |
627 | PL_min_intro_pending = offset; | |
628 | PL_max_intro_pending = offset; | |
629 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
630 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
631 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 632 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 633 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 634 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 | 635 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
6d5c2147 FC |
636 | else if (namelen != 0 && *namepv == '&') |
637 | sv_upgrade(PL_curpad[offset], SVt_PVCV); | |
c1bf42f3 | 638 | assert(SvPADMY(PL_curpad[offset])); |
3291825f NC |
639 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
640 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
641 | (long)offset, SvPVX(namesv), |
642 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
643 | |
644 | return offset; | |
645 | } | |
646 | ||
cc76b5cc Z |
647 | /* |
648 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 649 | |
cc76b5cc Z |
650 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
651 | instead of a string/length pair. | |
dd2155a4 | 652 | |
cc76b5cc Z |
653 | =cut |
654 | */ | |
655 | ||
656 | PADOFFSET | |
657 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 658 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
659 | { |
660 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
661 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
662 | } | |
dd2155a4 DM |
663 | |
664 | /* | |
cc76b5cc | 665 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 666 | |
cc76b5cc Z |
667 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
668 | of an SV instead of a string/length pair. | |
669 | ||
670 | =cut | |
671 | */ | |
672 | ||
673 | PADOFFSET | |
674 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
675 | { | |
676 | char *namepv; | |
677 | STRLEN namelen; | |
678 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
679 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
680 | if (SvUTF8(name)) |
681 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
682 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
683 | } | |
684 | ||
685 | /* | |
686 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
687 | ||
688 | Allocates a place in the currently-compiling pad, | |
689 | returning the offset of the allocated pad slot. | |
690 | No name is initially attached to the pad slot. | |
691 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
692 | which will be set in the value SV for the allocated pad entry: | |
693 | ||
694 | SVs_PADMY named lexical variable ("my", "our", "state") | |
695 | SVs_PADTMP unnamed temporary store | |
325e1816 FC |
696 | SVf_READONLY constant shared between recursion levels |
697 | ||
698 | C<SVf_READONLY> has been supported here only since perl 5.20. To work with | |
c370bd2e FC |
699 | earlier versions as well, use C<SVf_READONLY|SVs_PADTMP>. C<SVf_READONLY> |
700 | does not cause the SV in the pad slot to be marked read-only, but simply | |
701 | tells C<pad_alloc> that it I<will> be made read-only (by the caller), or at | |
702 | least should be treated as such. | |
cc76b5cc Z |
703 | |
704 | I<optype> should be an opcode indicating the type of operation that the | |
705 | pad entry is to support. This doesn't affect operational semantics, | |
706 | but is used for debugging. | |
dd2155a4 DM |
707 | |
708 | =cut | |
709 | */ | |
710 | ||
711 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
712 | * or at least rationalise ??? */ | |
dd2155a4 DM |
713 | |
714 | PADOFFSET | |
715 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
716 | { | |
717 | SV *sv; | |
718 | I32 retval; | |
719 | ||
6136c704 | 720 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
721 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
722 | ||
dd2155a4 | 723 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
724 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
725 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
726 | if (PL_pad_reset_pending) |
727 | pad_reset(); | |
728 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 729 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 730 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
731 | retval = AvFILLp(PL_comppad); |
732 | } | |
733 | else { | |
cc76b5cc Z |
734 | /* For a tmp, scan the pad from PL_padix upwards |
735 | * for a slot which has no name and no active value. | |
b54c5e14 | 736 | * For a constant, likewise, but use PL_constpadix. |
cc76b5cc | 737 | */ |
551405c4 | 738 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 739 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
b54c5e14 FC |
740 | const bool konst = cBOOL(tmptype & SVf_READONLY); |
741 | retval = konst ? PL_constpadix : PL_padix; | |
dd2155a4 DM |
742 | for (;;) { |
743 | /* | |
833bf1cd FC |
744 | * Entries that close over unavailable variables |
745 | * in outer subs contain values not marked PADMY. | |
746 | * Thus we must skip, not just pad values that are | |
dd2155a4 | 747 | * marked as current pad values, but also those with names. |
1780e744 FC |
748 | * If pad_reset is enabled, ‘current’ means different |
749 | * things depending on whether we are allocating a con- | |
750 | * stant or a target. For a target, things marked PADTMP | |
751 | * can be reused; not so for constants. | |
dd2155a4 | 752 | */ |
b54c5e14 FC |
753 | if (++retval <= names_fill && |
754 | (sv = names[retval]) && sv != &PL_sv_undef) | |
dd2155a4 | 755 | continue; |
b54c5e14 | 756 | sv = *av_fetch(PL_comppad, retval, TRUE); |
a90643eb | 757 | if (!(SvFLAGS(sv) & |
53de1311 | 758 | #ifdef USE_PAD_RESET |
b54c5e14 | 759 | (SVs_PADMY|(konst ? SVs_PADTMP : 0)) |
a90643eb FC |
760 | #else |
761 | (SVs_PADMY|SVs_PADTMP) | |
762 | #endif | |
763 | ) && | |
a888bde5 | 764 | !IS_PADGV(sv)) |
dd2155a4 DM |
765 | break; |
766 | } | |
b54c5e14 FC |
767 | if (konst) { |
768 | av_store(PL_comppad_name, retval, &PL_sv_no); | |
325e1816 FC |
769 | tmptype &= ~SVf_READONLY; |
770 | tmptype |= SVs_PADTMP; | |
771 | } | |
b54c5e14 | 772 | *(konst ? &PL_constpadix : &PL_padix) = retval; |
dd2155a4 DM |
773 | } |
774 | SvFLAGS(sv) |= tmptype; | |
775 | PL_curpad = AvARRAY(PL_comppad); | |
776 | ||
777 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
778 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
779 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
780 | PL_op_name[optype])); | |
fd0854ff DM |
781 | #ifdef DEBUG_LEAKING_SCALARS |
782 | sv->sv_debug_optype = optype; | |
783 | sv->sv_debug_inpad = 1; | |
fd0854ff | 784 | #endif |
a212c8b5 | 785 | return (PADOFFSET)retval; |
dd2155a4 DM |
786 | } |
787 | ||
788 | /* | |
cc76b5cc | 789 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 790 | |
cc76b5cc Z |
791 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
792 | for an anonymous function that is lexically scoped inside the | |
793 | currently-compiling function. | |
794 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
795 | to the outer scope is weakened to avoid a reference loop. | |
796 | ||
84eea980 FC |
797 | One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>. |
798 | ||
cc76b5cc Z |
799 | I<optype> should be an opcode indicating the type of operation that the |
800 | pad entry is to support. This doesn't affect operational semantics, | |
801 | but is used for debugging. | |
dd2155a4 DM |
802 | |
803 | =cut | |
804 | */ | |
805 | ||
806 | PADOFFSET | |
cc76b5cc | 807 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 DM |
808 | { |
809 | PADOFFSET ix; | |
b9f83d2f | 810 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
811 | |
812 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
813 | ||
1dba731d | 814 | pad_peg("add_anon"); |
76f68e9b | 815 | sv_setpvs(name, "&"); |
0d311cdb DM |
816 | /* These two aren't used; just make sure they're not equal to |
817 | * PERL_PADSEQ_INTRO */ | |
818 | COP_SEQ_RANGE_LOW_set(name, 0); | |
819 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 820 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 821 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 822 | /* XXX DAPM use PL_curpad[] ? */ |
e09ac076 FC |
823 | if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func)) |
824 | av_store(PL_comppad, ix, (SV*)func); | |
825 | else { | |
7c93c29b | 826 | SV *rv = newRV_noinc((SV *)func); |
e09ac076 FC |
827 | sv_rvweaken(rv); |
828 | assert (SvTYPE(func) == SVt_PVFM); | |
829 | av_store(PL_comppad, ix, rv); | |
830 | } | |
cc76b5cc | 831 | SvPADMY_on((SV*)func); |
7dafbf52 DM |
832 | |
833 | /* to avoid ref loops, we never have parent + child referencing each | |
834 | * other simultaneously */ | |
e09ac076 | 835 | if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) { |
cc76b5cc Z |
836 | assert(!CvWEAKOUTSIDE(func)); |
837 | CvWEAKOUTSIDE_on(func); | |
fc2b2dca | 838 | SvREFCNT_dec_NN(CvOUTSIDE(func)); |
7dafbf52 | 839 | } |
dd2155a4 DM |
840 | return ix; |
841 | } | |
842 | ||
dd2155a4 | 843 | /* |
13087dd8 | 844 | =for apidoc pad_check_dup |
dd2155a4 DM |
845 | |
846 | Check for duplicate declarations: report any of: | |
13087dd8 | 847 | |
dd2155a4 | 848 | * a my in the current scope with the same name; |
13087dd8 FC |
849 | * an our (anywhere in the pad) with the same name and the |
850 | same stash as C<ourstash> | |
851 | ||
852 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
853 | |
854 | =cut | |
855 | */ | |
856 | ||
20381b50 | 857 | STATIC void |
cc76b5cc | 858 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 859 | { |
53c1dcc0 | 860 | SV **svp; |
dd2155a4 | 861 | PADOFFSET top, off; |
59cfed7d | 862 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 863 | |
7918f24d NC |
864 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
865 | ||
f3548bdc | 866 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 867 | |
59cfed7d | 868 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 869 | |
041457d9 | 870 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
871 | return; /* nothing to check */ |
872 | ||
873 | svp = AvARRAY(PL_comppad_name); | |
874 | top = AvFILLp(PL_comppad_name); | |
875 | /* check the current scope */ | |
876 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
877 | * type ? */ | |
878 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
879 | SV * const sv = svp[off]; |
880 | if (sv | |
325e1816 | 881 | && PadnameLEN(sv) |
ee6cee0c | 882 | && !SvFAKE(sv) |
0d311cdb DM |
883 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
884 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 885 | && sv_eq(name, sv)) |
dd2155a4 | 886 | { |
00b1698f | 887 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 888 | break; /* "our" masking "our" */ |
4eb94d7c | 889 | /* diag_listed_as: "%s" variable %s masks earlier declaration in same %s */ |
dd2155a4 | 890 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
4eb94d7c | 891 | "\"%s\" %s %"SVf" masks earlier declaration in same %s", |
12bd6ede | 892 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
4eb94d7c | 893 | *SvPVX(sv) == '&' ? "subroutine" : "variable", |
c1f6cd39 | 894 | SVfARG(sv), |
2df5bdd7 DM |
895 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
896 | ? "scope" : "statement")); | |
dd2155a4 DM |
897 | --off; |
898 | break; | |
899 | } | |
900 | } | |
901 | /* check the rest of the pad */ | |
902 | if (is_our) { | |
61c5492a | 903 | while (off > 0) { |
53c1dcc0 AL |
904 | SV * const sv = svp[off]; |
905 | if (sv | |
325e1816 | 906 | && PadnameLEN(sv) |
ee6cee0c | 907 | && !SvFAKE(sv) |
0d311cdb DM |
908 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
909 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 910 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 911 | && sv_eq(name, sv)) |
dd2155a4 DM |
912 | { |
913 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c1f6cd39 | 914 | "\"our\" variable %"SVf" redeclared", SVfARG(sv)); |
624f69f5 | 915 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
916 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
917 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
918 | break; |
919 | } | |
61c5492a NC |
920 | --off; |
921 | } | |
dd2155a4 DM |
922 | } |
923 | } | |
924 | ||
925 | ||
dd2155a4 | 926 | /* |
cc76b5cc | 927 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 928 | |
cc76b5cc Z |
929 | Given the name of a lexical variable, find its position in the |
930 | currently-compiling pad. | |
931 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
932 | I<flags> is reserved and must be zero. | |
933 | If it is not in the current pad but appears in the pad of any lexically | |
934 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
935 | Returns the offset in the current pad, | |
936 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
937 | |
938 | =cut | |
939 | */ | |
940 | ||
941 | PADOFFSET | |
cc76b5cc | 942 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 943 | { |
b5c19bd7 DM |
944 | SV *out_sv; |
945 | int out_flags; | |
929a0744 | 946 | I32 offset; |
e1ec3a88 | 947 | const AV *nameav; |
929a0744 | 948 | SV **name_svp; |
dd2155a4 | 949 | |
cc76b5cc | 950 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 951 | |
cc76b5cc | 952 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 953 | |
2435e5d3 | 954 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 955 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
956 | (UV)flags); |
957 | ||
e8b34487 BF |
958 | if (flags & padadd_UTF8_NAME) { |
959 | bool is_utf8 = TRUE; | |
960 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
961 | ||
962 | if (is_utf8) | |
963 | flags |= padadd_UTF8_NAME; | |
964 | else | |
965 | flags &= ~padadd_UTF8_NAME; | |
966 | } | |
967 | ||
fbb889c8 BF |
968 | offset = pad_findlex(namepv, namelen, flags, |
969 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 970 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
971 | return offset; |
972 | ||
f0727190 FC |
973 | /* Skip the ‘our’ hack for subroutines, as the warning does not apply. |
974 | */ | |
975 | if (*namepv == '&') return NOT_IN_PAD; | |
976 | ||
929a0744 DM |
977 | /* look for an our that's being introduced; this allows |
978 | * our $foo = 0 unless defined $foo; | |
979 | * to not give a warning. (Yes, this is a hack) */ | |
980 | ||
86d2498c | 981 | nameav = PadlistARRAY(CvPADLIST(PL_compcv))[0]; |
929a0744 | 982 | name_svp = AvARRAY(nameav); |
7f713aaa | 983 | for (offset = PadnamelistMAXNAMED(nameav); offset > 0; offset--) { |
551405c4 | 984 | const SV * const namesv = name_svp[offset]; |
325e1816 | 985 | if (namesv && PadnameLEN(namesv) == namelen |
929a0744 | 986 | && !SvFAKE(namesv) |
00b1698f | 987 | && (SvPAD_OUR(namesv)) |
e8b34487 BF |
988 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
989 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 990 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
991 | ) |
992 | return offset; | |
993 | } | |
994 | return NOT_IN_PAD; | |
dd2155a4 DM |
995 | } |
996 | ||
e1f795dc | 997 | /* |
cc76b5cc Z |
998 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
999 | ||
1000 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
1001 | instead of a string/length pair. | |
1002 | ||
1003 | =cut | |
1004 | */ | |
1005 | ||
1006 | PADOFFSET | |
1007 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
1008 | { | |
1009 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
1010 | return pad_findmy_pvn(name, strlen(name), flags); | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
1015 | ||
1016 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
1017 | of an SV instead of a string/length pair. | |
1018 | ||
1019 | =cut | |
1020 | */ | |
1021 | ||
1022 | PADOFFSET | |
1023 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1024 | { | |
1025 | char *namepv; | |
1026 | STRLEN namelen; | |
1027 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
1028 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
1029 | if (SvUTF8(name)) |
1030 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
1031 | return pad_findmy_pvn(namepv, namelen, flags); |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1036 | ||
1037 | Find the position of the lexical C<$_> in the pad of the | |
1038 | currently-executing function. Returns the offset in the current pad, | |
1039 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1040 | the global one should be used instead). | |
1041 | L</find_rundefsv> is likely to be more convenient. | |
1042 | ||
1043 | =cut | |
1044 | */ | |
e1f795dc RGS |
1045 | |
1046 | PADOFFSET | |
29289021 | 1047 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc RGS |
1048 | { |
1049 | SV *out_sv; | |
1050 | int out_flags; | |
fbb889c8 | 1051 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 1052 | NULL, &out_sv, &out_flags); |
e1f795dc | 1053 | } |
dd2155a4 | 1054 | |
dd2155a4 | 1055 | /* |
cc76b5cc Z |
1056 | =for apidoc Am|SV *|find_rundefsv |
1057 | ||
1058 | Find and return the variable that is named C<$_> in the lexical scope | |
1059 | of the currently-executing function. This may be a lexical C<$_>, | |
1060 | or will otherwise be the global one. | |
1061 | ||
1062 | =cut | |
1063 | */ | |
789bd863 VP |
1064 | |
1065 | SV * | |
1066 | Perl_find_rundefsv(pTHX) | |
1067 | { | |
1068 | SV *namesv; | |
1069 | int flags; | |
1070 | PADOFFSET po; | |
1071 | ||
fbb889c8 | 1072 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
1073 | NULL, &namesv, &flags); |
1074 | ||
1979170b | 1075 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
1076 | return DEFSV; |
1077 | ||
1078 | return PAD_SVl(po); | |
1079 | } | |
1080 | ||
c086f97a FC |
1081 | SV * |
1082 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1083 | { | |
1084 | SV *namesv; | |
1085 | int flags; | |
1086 | PADOFFSET po; | |
1087 | ||
1088 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1089 | ||
1090 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1091 | NULL, &namesv, &flags); | |
1092 | ||
1093 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1094 | return DEFSV; | |
1095 | ||
86d2498c | 1096 | return AvARRAY(PadlistARRAY(CvPADLIST(cv))[CvDEPTH(cv)])[po]; |
c086f97a FC |
1097 | } |
1098 | ||
789bd863 | 1099 | /* |
fbb889c8 | 1100 | =for apidoc m|PADOFFSET|pad_findlex|const char *namepv|STRLEN namelen|U32 flags|const CV* cv|U32 seq|int warn|SV** out_capture|SV** out_name_sv|int *out_flags |
dd2155a4 | 1101 | |
72d33970 | 1102 | Find a named lexical anywhere in a chain of nested pads. Add fake entries |
b5c19bd7 DM |
1103 | in the inner pads if it's found in an outer one. |
1104 | ||
1105 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1106 | cv is the CV in which to start the search, and seq is the current cop_seq | |
72d33970 | 1107 | to match against. If warn is true, print appropriate warnings. The out_* |
b5c19bd7 | 1108 | vars return values, and so are pointers to where the returned values |
72d33970 | 1109 | should be stored. out_capture, if non-null, requests that the innermost |
b5c19bd7 DM |
1110 | instance of the lexical is captured; out_name_sv is set to the innermost |
1111 | matched namesv or fake namesv; out_flags returns the flags normally | |
1112 | associated with the IVX field of a fake namesv. | |
1113 | ||
1114 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
72d33970 FC |
1115 | then comes back down, adding fake entries |
1116 | as it goes. It has to be this way | |
3441fb63 | 1117 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1118 | the parent pad. |
dd2155a4 DM |
1119 | |
1120 | =cut | |
1121 | */ | |
1122 | ||
b5c19bd7 DM |
1123 | /* the CV has finished being compiled. This is not a sufficient test for |
1124 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1125 | #define CvCOMPILED(cv) CvROOT(cv) | |
1126 | ||
71f882da | 1127 | /* the CV does late binding of its lexicals */ |
e07561e6 | 1128 | #define CvLATE(cv) (CvANON(cv) || CvCLONE(cv) || SvTYPE(cv) == SVt_PVFM) |
71f882da | 1129 | |
445f13ff FC |
1130 | static void |
1131 | S_unavailable(pTHX_ SV *namesv) | |
1132 | { | |
1133 | /* diag_listed_as: Variable "%s" is not available */ | |
1134 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
1135 | "%se \"%"SVf"\" is not available", | |
1136 | *SvPVX_const(namesv) == '&' | |
1137 | ? "Subroutin" | |
1138 | : "Variabl", | |
c1f6cd39 | 1139 | SVfARG(namesv)); |
445f13ff | 1140 | } |
b5c19bd7 | 1141 | |
dd2155a4 | 1142 | STATIC PADOFFSET |
fbb889c8 | 1143 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1144 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1145 | { |
b5c19bd7 DM |
1146 | I32 offset, new_offset; |
1147 | SV *new_capture; | |
1148 | SV **new_capturep; | |
b70d5558 | 1149 | const PADLIST * const padlist = CvPADLIST(cv); |
7ef30830 | 1150 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1151 | |
7918f24d NC |
1152 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1153 | ||
7ef30830 | 1154 | if (flags & ~(padadd_UTF8_NAME|padadd_STALEOK)) |
2435e5d3 BF |
1155 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1156 | (UV)flags); | |
7ef30830 | 1157 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
2435e5d3 | 1158 | |
b5c19bd7 | 1159 | *out_flags = 0; |
a3985cdc | 1160 | |
b5c19bd7 | 1161 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1162 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1163 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1164 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1165 | |
b5c19bd7 | 1166 | /* first, search this pad */ |
dd2155a4 | 1167 | |
b5c19bd7 DM |
1168 | if (padlist) { /* not an undef CV */ |
1169 | I32 fake_offset = 0; | |
86d2498c | 1170 | const AV * const nameav = PadlistARRAY(padlist)[0]; |
551405c4 | 1171 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1172 | |
7db6405c | 1173 | for (offset = PadnamelistMAXNAMED(nameav); offset > 0; offset--) { |
551405c4 | 1174 | const SV * const namesv = name_svp[offset]; |
325e1816 | 1175 | if (namesv && PadnameLEN(namesv) == namelen |
e8b34487 BF |
1176 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1177 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1178 | { |
6012dc80 | 1179 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1180 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1181 | continue; |
1182 | } | |
1183 | /* is seq within the range _LOW to _HIGH ? | |
1184 | * This is complicated by the fact that PL_cop_seqmax | |
1185 | * may have wrapped around at some point */ | |
1186 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1187 | continue; /* not yet introduced */ | |
1188 | ||
1189 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1190 | /* in compiling scope */ | |
1191 | if ( | |
1192 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1193 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1194 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1195 | ) | |
1196 | break; | |
1197 | } | |
1198 | else if ( | |
1199 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1200 | ? | |
1201 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1202 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1203 | ||
1204 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1205 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1206 | ) | |
1207 | break; | |
ee6cee0c DM |
1208 | } |
1209 | } | |
1210 | ||
b5c19bd7 DM |
1211 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1212 | if (offset > 0) { /* not fake */ | |
1213 | fake_offset = 0; | |
1214 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1215 | ||
1216 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1217 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1218 | * ideally, we should detect my's declared within loops | |
1219 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1220 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1221 | * lexes as not multi as viewed from evals. */ |
1222 | ||
1223 | *out_flags = CvANON(cv) ? | |
1224 | PAD_FAKELEX_ANON : | |
1225 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1226 | ? PAD_FAKELEX_MULTI : 0; | |
1227 | ||
1228 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1229 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1230 | PTR2UV(cv), (long)offset, | |
1231 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1232 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1233 | } |
1234 | else { /* fake match */ | |
1235 | offset = fake_offset; | |
1236 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1237 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1238 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1239 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1240 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1241 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1242 | )); |
1243 | } | |
dd2155a4 | 1244 | |
b5c19bd7 | 1245 | /* return the lex? */ |
dd2155a4 | 1246 | |
b5c19bd7 | 1247 | if (out_capture) { |
dd2155a4 | 1248 | |
b5c19bd7 | 1249 | /* our ? */ |
00b1698f | 1250 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1251 | *out_capture = NULL; |
b5c19bd7 DM |
1252 | return offset; |
1253 | } | |
ee6cee0c | 1254 | |
b5c19bd7 DM |
1255 | /* trying to capture from an anon prototype? */ |
1256 | if (CvCOMPILED(cv) | |
1257 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1258 | : *out_flags & PAD_FAKELEX_ANON) | |
1259 | { | |
a2a5de95 | 1260 | if (warn) |
445f13ff | 1261 | S_unavailable(aTHX_ |
0727928e BF |
1262 | newSVpvn_flags(namepv, namelen, |
1263 | SVs_TEMP | | |
1264 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1265 | ||
a0714e2c | 1266 | *out_capture = NULL; |
b5c19bd7 | 1267 | } |
ee6cee0c | 1268 | |
b5c19bd7 DM |
1269 | /* real value */ |
1270 | else { | |
1271 | int newwarn = warn; | |
1272 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1273 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1274 | && warn && ckWARN(WARN_CLOSURE)) { |
1275 | newwarn = 0; | |
1276 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e | 1277 | "Variable \"%"SVf"\" will not stay shared", |
c1f6cd39 | 1278 | SVfARG(newSVpvn_flags(namepv, namelen, |
0727928e | 1279 | SVs_TEMP | |
c1f6cd39 | 1280 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)))); |
b5c19bd7 | 1281 | } |
dd2155a4 | 1282 | |
b5c19bd7 DM |
1283 | if (fake_offset && CvANON(cv) |
1284 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1285 | { | |
1286 | SV *n; | |
1287 | /* not yet caught - look further up */ | |
1288 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1289 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1290 | PTR2UV(cv))); | |
1291 | n = *out_name_sv; | |
fbb889c8 | 1292 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1293 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1294 | newwarn, out_capture, out_name_sv, out_flags); |
1295 | *out_name_sv = n; | |
1296 | return offset; | |
dd2155a4 | 1297 | } |
b5c19bd7 | 1298 | |
86d2498c | 1299 | *out_capture = AvARRAY(PadlistARRAY(padlist)[ |
7261499d | 1300 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; |
b5c19bd7 DM |
1301 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1302 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1303 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1304 | |
d1186544 | 1305 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1306 | && (!CvDEPTH(cv) || !staleok) |
d1186544 DM |
1307 | && !SvPAD_STATE(name_svp[offset])) |
1308 | { | |
445f13ff | 1309 | S_unavailable(aTHX_ |
0727928e BF |
1310 | newSVpvn_flags(namepv, namelen, |
1311 | SVs_TEMP | | |
1312 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1313 | *out_capture = NULL; |
dd2155a4 DM |
1314 | } |
1315 | } | |
b5c19bd7 | 1316 | if (!*out_capture) { |
cc76b5cc | 1317 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1318 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1319 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1320 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
6d5c2147 FC |
1321 | else if (namelen != 0 && *namepv == '&') |
1322 | *out_capture = sv_2mortal(newSV_type(SVt_PVCV)); | |
b5c19bd7 DM |
1323 | else |
1324 | *out_capture = sv_newmortal(); | |
1325 | } | |
dd2155a4 | 1326 | } |
b5c19bd7 DM |
1327 | |
1328 | return offset; | |
ee6cee0c | 1329 | } |
b5c19bd7 DM |
1330 | } |
1331 | ||
1332 | /* it's not in this pad - try above */ | |
1333 | ||
1334 | if (!CvOUTSIDE(cv)) | |
1335 | return NOT_IN_PAD; | |
9f7d9405 | 1336 | |
b5c19bd7 | 1337 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1338 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1339 | new_capturep = out_capture ? out_capture : |
4608196e | 1340 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1341 | |
7ef30830 FC |
1342 | offset = pad_findlex(namepv, namelen, |
1343 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1344 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
b5c19bd7 | 1345 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1346 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1347 | return NOT_IN_PAD; |
9f7d9405 | 1348 | |
b5c19bd7 DM |
1349 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1350 | ||
1351 | /* don't add new fake entries (via eval) to CVs that we have already | |
1352 | * finished compiling, or to undef CVs */ | |
1353 | if (CvCOMPILED(cv) || !padlist) | |
1354 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1355 | ||
1356 | { | |
3291825f | 1357 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1358 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1359 | "good" and only copying flag bits and pointers that it understands. |
1360 | */ | |
1361 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1362 | AV * const ocomppad_name = PL_comppad_name; |
1363 | PAD * const ocomppad = PL_comppad; | |
86d2498c FC |
1364 | PL_comppad_name = PadlistARRAY(padlist)[0]; |
1365 | PL_comppad = PadlistARRAY(padlist)[1]; | |
b5c19bd7 DM |
1366 | PL_curpad = AvARRAY(PL_comppad); |
1367 | ||
3291825f | 1368 | new_offset |
cc76b5cc | 1369 | = pad_alloc_name(new_namesv, |
59cfed7d | 1370 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1371 | SvPAD_TYPED(*out_name_sv) |
1372 | ? SvSTASH(*out_name_sv) : NULL, | |
1373 | SvOURSTASH(*out_name_sv) | |
1374 | ); | |
1375 | ||
1376 | SvFAKE_on(new_namesv); | |
1377 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1378 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1379 | (long)new_offset, | |
1380 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1381 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1382 | |
809abb02 | 1383 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1384 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1385 | NOOP; /* do nothing */ |
b5c19bd7 | 1386 | } |
71f882da | 1387 | else if (CvLATE(cv)) { |
b5c19bd7 | 1388 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1389 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1390 | CvCLONE_on(cv); |
1391 | } | |
1392 | else { | |
1393 | /* immediate creation - capture outer value right now */ | |
1394 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
81df9f6f FC |
1395 | /* But also note the offset, as newMYSUB needs it */ |
1396 | PARENT_PAD_INDEX_set(new_namesv, offset); | |
b5c19bd7 DM |
1397 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1398 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1399 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1400 | } |
b5c19bd7 | 1401 | *out_name_sv = new_namesv; |
809abb02 | 1402 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1403 | |
1404 | PL_comppad_name = ocomppad_name; | |
1405 | PL_comppad = ocomppad; | |
4608196e | 1406 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1407 | } |
b5c19bd7 | 1408 | return new_offset; |
dd2155a4 DM |
1409 | } |
1410 | ||
fb8a9836 | 1411 | #ifdef DEBUGGING |
cc76b5cc | 1412 | |
dd2155a4 | 1413 | /* |
cc76b5cc | 1414 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1415 | |
cc76b5cc | 1416 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1417 | Use macro PAD_SV instead of calling this function directly. |
1418 | ||
1419 | =cut | |
1420 | */ | |
1421 | ||
dd2155a4 DM |
1422 | SV * |
1423 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1424 | { | |
f3548bdc | 1425 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1426 | |
dd2155a4 DM |
1427 | if (!po) |
1428 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1429 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1430 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1431 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1432 | ); |
1433 | return PL_curpad[po]; | |
1434 | } | |
1435 | ||
dd2155a4 | 1436 | /* |
cc76b5cc | 1437 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1438 | |
cc76b5cc | 1439 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1440 | Use the macro PAD_SETSV() rather than calling this function directly. |
1441 | ||
1442 | =cut | |
1443 | */ | |
1444 | ||
dd2155a4 DM |
1445 | void |
1446 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1447 | { | |
7918f24d NC |
1448 | PERL_ARGS_ASSERT_PAD_SETSV; |
1449 | ||
f3548bdc | 1450 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1451 | |
1452 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1453 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1454 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1455 | ); |
1456 | PL_curpad[po] = sv; | |
1457 | } | |
dd2155a4 | 1458 | |
cc76b5cc | 1459 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1460 | |
1461 | /* | |
cc76b5cc | 1462 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 | 1463 | |
e89fca5e | 1464 | Update the pad compilation state variables on entry to a new block. |
dd2155a4 DM |
1465 | |
1466 | =cut | |
1467 | */ | |
1468 | ||
1469 | /* XXX DAPM perhaps: | |
1470 | * - integrate this in general state-saving routine ??? | |
1471 | * - combine with the state-saving going on in pad_new ??? | |
1472 | * - introduce a new SAVE type that does all this in one go ? | |
1473 | */ | |
1474 | ||
1475 | void | |
1476 | Perl_pad_block_start(pTHX_ int full) | |
1477 | { | |
f3548bdc | 1478 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1479 | SAVEI32(PL_comppad_name_floor); |
1480 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1481 | if (full) | |
1482 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1483 | if (PL_comppad_name_floor < 0) | |
1484 | PL_comppad_name_floor = 0; | |
1485 | SAVEI32(PL_min_intro_pending); | |
1486 | SAVEI32(PL_max_intro_pending); | |
1487 | PL_min_intro_pending = 0; | |
1488 | SAVEI32(PL_comppad_name_fill); | |
1489 | SAVEI32(PL_padix_floor); | |
1780e744 FC |
1490 | /* PL_padix_floor is what PL_padix is reset to at the start of each |
1491 | statement, by pad_reset(). We set it when entering a new scope | |
1492 | to keep things like this working: | |
1493 | print "$foo$bar", do { this(); that() . "foo" }; | |
1494 | We must not let "$foo$bar" and the later concatenation share the | |
1495 | same target. */ | |
dd2155a4 DM |
1496 | PL_padix_floor = PL_padix; |
1497 | PL_pad_reset_pending = FALSE; | |
1498 | } | |
1499 | ||
dd2155a4 | 1500 | /* |
cc76b5cc | 1501 | =for apidoc m|U32|intro_my |
dd2155a4 | 1502 | |
bf954566 FC |
1503 | "Introduce" my variables to visible status. This is called during parsing |
1504 | at the end of each statement to make lexical variables visible to | |
1505 | subsequent statements. | |
dd2155a4 DM |
1506 | |
1507 | =cut | |
1508 | */ | |
1509 | ||
1510 | U32 | |
1511 | Perl_intro_my(pTHX) | |
1512 | { | |
1513 | SV **svp; | |
dd2155a4 | 1514 | I32 i; |
6012dc80 | 1515 | U32 seq; |
dd2155a4 | 1516 | |
f3548bdc | 1517 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1518 | if (! PL_min_intro_pending) |
1519 | return PL_cop_seqmax; | |
1520 | ||
1521 | svp = AvARRAY(PL_comppad_name); | |
1522 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1523 | SV * const sv = svp[i]; |
1524 | ||
325e1816 | 1525 | if (sv && PadnameLEN(sv) && !SvFAKE(sv) |
0d311cdb DM |
1526 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) |
1527 | { | |
2df5bdd7 | 1528 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1529 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1530 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1531 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1532 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1533 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1534 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1535 | ); |
1536 | } | |
1537 | } | |
6012dc80 DM |
1538 | seq = PL_cop_seqmax; |
1539 | PL_cop_seqmax++; | |
1540 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1541 | PL_cop_seqmax++; | |
dd2155a4 DM |
1542 | PL_min_intro_pending = 0; |
1543 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1544 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1545 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1546 | |
6012dc80 | 1547 | return seq; |
dd2155a4 DM |
1548 | } |
1549 | ||
1550 | /* | |
cc76b5cc | 1551 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1552 | |
1553 | Cleanup at end of scope during compilation: set the max seq number for | |
1554 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1555 | ||
1556 | =cut | |
1557 | */ | |
1558 | ||
6d5c2147 | 1559 | OP * |
dd2155a4 DM |
1560 | Perl_pad_leavemy(pTHX) |
1561 | { | |
1562 | I32 off; | |
6d5c2147 | 1563 | OP *o = NULL; |
551405c4 | 1564 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1565 | |
1566 | PL_pad_reset_pending = FALSE; | |
1567 | ||
f3548bdc | 1568 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1569 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1570 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1571 | const SV * const sv = svp[off]; |
325e1816 | 1572 | if (sv && PadnameLEN(sv) && !SvFAKE(sv)) |
9b387841 NC |
1573 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1574 | "%"SVf" never introduced", | |
1575 | SVfARG(sv)); | |
dd2155a4 DM |
1576 | } |
1577 | } | |
1578 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1579 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
6d5c2147 | 1580 | SV * const sv = svp[off]; |
325e1816 | 1581 | if (sv && PadnameLEN(sv) && !SvFAKE(sv) |
2df5bdd7 DM |
1582 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) |
1583 | { | |
809abb02 | 1584 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1585 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1586 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1587 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1588 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1589 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 | 1590 | ); |
6d5c2147 FC |
1591 | if (!PadnameIsSTATE(sv) && !PadnameIsOUR(sv) |
1592 | && *PadnamePV(sv) == '&' && PadnameLEN(sv) > 1) { | |
1593 | OP *kid = newOP(OP_INTROCV, 0); | |
1594 | kid->op_targ = off; | |
1595 | o = op_prepend_elem(OP_LINESEQ, kid, o); | |
1596 | } | |
dd2155a4 DM |
1597 | } |
1598 | } | |
1599 | PL_cop_seqmax++; | |
6012dc80 DM |
1600 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1601 | PL_cop_seqmax++; | |
dd2155a4 DM |
1602 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1603 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
6d5c2147 | 1604 | return o; |
dd2155a4 DM |
1605 | } |
1606 | ||
dd2155a4 | 1607 | /* |
cc76b5cc | 1608 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1609 | |
1610 | Abandon the tmp in the current pad at offset po and replace with a | |
1611 | new one. | |
1612 | ||
1613 | =cut | |
1614 | */ | |
1615 | ||
1616 | void | |
1617 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1618 | { | |
f3548bdc | 1619 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1620 | if (!PL_curpad) |
1621 | return; | |
1622 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1623 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1624 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1625 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1626 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1627 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1628 | |
1629 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1630 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1631 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1632 | ||
dd2155a4 DM |
1633 | if (refadjust) |
1634 | SvREFCNT_dec(PL_curpad[po]); | |
1635 | ||
9ad9869c DM |
1636 | |
1637 | /* if pad tmps aren't shared between ops, then there's no need to | |
1638 | * create a new tmp when an existing op is freed */ | |
53de1311 | 1639 | #ifdef USE_PAD_RESET |
561b68a9 | 1640 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1641 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c | 1642 | #else |
ce0d59fd | 1643 | PL_curpad[po] = NULL; |
97bf4a8d | 1644 | #endif |
325e1816 | 1645 | if (PadnamelistMAX(PL_comppad_name) != -1 |
4891fdfa | 1646 | && (PADOFFSET)PadnamelistMAX(PL_comppad_name) >= po) { |
ce0d59fd FC |
1647 | if (PadnamelistARRAY(PL_comppad_name)[po]) { |
1648 | assert(!PadnameLEN(PadnamelistARRAY(PL_comppad_name)[po])); | |
1649 | } | |
325e1816 FC |
1650 | PadnamelistARRAY(PL_comppad_name)[po] = &PL_sv_undef; |
1651 | } | |
b54c5e14 FC |
1652 | /* Use PL_constpadix here, not PL_padix. The latter may have been |
1653 | reset by pad_reset. We don’t want pad_alloc to have to scan the | |
1654 | whole pad when allocating a constant. */ | |
1655 | if ((I32)po < PL_constpadix) | |
1656 | PL_constpadix = po - 1; | |
dd2155a4 DM |
1657 | } |
1658 | ||
dd2155a4 | 1659 | /* |
cc76b5cc | 1660 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1661 | |
1662 | Mark all the current temporaries for reuse | |
1663 | ||
1664 | =cut | |
1665 | */ | |
1666 | ||
1780e744 FC |
1667 | /* pad_reset() causes pad temp TARGs (operator targets) to be shared |
1668 | * between OPs from different statements. During compilation, at the start | |
1669 | * of each statement pad_reset resets PL_padix back to its previous value. | |
1670 | * When allocating a target, pad_alloc begins its scan through the pad at | |
1671 | * PL_padix+1. */ | |
1f676739 | 1672 | static void |
82af08ae | 1673 | S_pad_reset(pTHX) |
dd2155a4 | 1674 | { |
53de1311 | 1675 | #ifdef USE_PAD_RESET |
dd2155a4 | 1676 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1677 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1678 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1679 | |
1680 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1681 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1682 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1683 | (long)PL_padix, (long)PL_padix_floor | |
1684 | ) | |
1685 | ); | |
1686 | ||
284167a5 | 1687 | if (!TAINTING_get) { /* Can't mix tainted and non-tainted temporaries. */ |
dd2155a4 DM |
1688 | PL_padix = PL_padix_floor; |
1689 | } | |
1690 | #endif | |
1691 | PL_pad_reset_pending = FALSE; | |
1692 | } | |
1693 | ||
dd2155a4 | 1694 | /* |
cc76b5cc Z |
1695 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1696 | ||
1697 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1698 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1699 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1700 | the kind of subroutine: | |
dd2155a4 | 1701 | |
cc76b5cc Z |
1702 | padtidy_SUB ordinary subroutine |
1703 | padtidy_SUBCLONE prototype for lexical closure | |
1704 | padtidy_FORMAT format | |
dd2155a4 DM |
1705 | |
1706 | =cut | |
1707 | */ | |
1708 | ||
1709 | /* XXX DAPM surely most of this stuff should be done properly | |
1710 | * at the right time beforehand, rather than going around afterwards | |
1711 | * cleaning up our mistakes ??? | |
1712 | */ | |
1713 | ||
1714 | void | |
1715 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1716 | { | |
27da23d5 | 1717 | dVAR; |
dd2155a4 | 1718 | |
f3548bdc | 1719 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 | 1720 | |
db21619c DM |
1721 | /* If this CV has had any 'eval-capable' ops planted in it: |
1722 | * i.e. it contains any of: | |
1723 | * | |
1724 | * * eval '...', | |
1725 | * * //ee, | |
1726 | * * use re 'eval'; /$var/ | |
1727 | * * /(?{..})/), | |
1728 | * | |
1729 | * Then any anon prototypes in the chain of CVs should be marked as | |
1730 | * cloneable, so that for example the eval's CV in | |
1731 | * | |
1732 | * sub { eval '$x' } | |
1733 | * | |
1734 | * gets the right CvOUTSIDE. If running with -d, *any* sub may | |
1735 | * potentially have an eval executed within it. | |
b5c19bd7 DM |
1736 | */ |
1737 | ||
1738 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1739 | const CV *cv; |
b5c19bd7 DM |
1740 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1741 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1742 | break; /* no need to mark already-compiled code */ | |
1743 | if (CvANON(cv)) { | |
1744 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1745 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1746 | CvCLONE_on(cv); | |
1747 | } | |
00cc8743 | 1748 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1749 | } |
1750 | } | |
1751 | ||
eb8137a9 | 1752 | /* extend namepad to match curpad */ |
dd2155a4 | 1753 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) |
a0714e2c | 1754 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1755 | |
1756 | if (type == padtidy_SUBCLONE) { | |
ce0d59fd | 1757 | SV ** const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1758 | PADOFFSET ix; |
b5c19bd7 | 1759 | |
dd2155a4 DM |
1760 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1761 | SV *namesv; | |
ce0d59fd | 1762 | if (!namep[ix]) namep[ix] = &PL_sv_undef; |
dd2155a4 | 1763 | |
dd2155a4 DM |
1764 | /* |
1765 | * The only things that a clonable function needs in its | |
3a6ce63a | 1766 | * pad are anonymous subs, constants and GVs. |
dd2155a4 DM |
1767 | * The rest are created anew during cloning. |
1768 | */ | |
ce0d59fd FC |
1769 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix]) |
1770 | || IS_PADGV(PL_curpad[ix])) | |
3a6ce63a | 1771 | continue; |
ce0d59fd FC |
1772 | namesv = namep[ix]; |
1773 | if (!(PadnamePV(namesv) && | |
3a6ce63a | 1774 | (!PadnameLEN(namesv) || *SvPVX_const(namesv) == '&'))) |
dd2155a4 DM |
1775 | { |
1776 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1777 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1778 | } |
1779 | } | |
1780 | } | |
1781 | else if (type == padtidy_SUB) { | |
1782 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1783 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1784 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1785 | AvREIFY_only(av); |
dd2155a4 DM |
1786 | } |
1787 | ||
4cee4ca8 | 1788 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
ce0d59fd | 1789 | SV ** const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1790 | PADOFFSET ix; |
dd2155a4 | 1791 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
ce0d59fd FC |
1792 | if (!namep[ix]) namep[ix] = &PL_sv_undef; |
1793 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix]) | |
1794 | || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
dd2155a4 | 1795 | continue; |
adf8f095 | 1796 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1797 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1798 | } else if (!SvFAKE(namep[ix])) { |
1799 | /* This is a work around for how the current implementation of | |
1800 | ?{ } blocks in regexps interacts with lexicals. | |
1801 | ||
1802 | One of our lexicals. | |
1803 | Can't do this on all lexicals, otherwise sub baz() won't | |
1804 | compile in | |
1805 | ||
1806 | my $foo; | |
1807 | ||
1808 | sub bar { ++$foo; } | |
1809 | ||
1810 | sub baz { ++$foo; } | |
1811 | ||
1812 | because completion of compiling &bar calling pad_tidy() | |
1813 | would cause (top level) $foo to be marked as stale, and | |
1814 | "no longer available". */ | |
1815 | SvPADSTALE_on(PL_curpad[ix]); | |
1816 | } | |
dd2155a4 DM |
1817 | } |
1818 | } | |
f3548bdc | 1819 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1820 | } |
1821 | ||
dd2155a4 | 1822 | /* |
cc76b5cc | 1823 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1824 | |
8627550a | 1825 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1826 | |
1827 | =cut | |
1828 | */ | |
1829 | ||
1830 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1831 | void | |
1832 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1833 | { | |
53de1311 | 1834 | #ifndef USE_PAD_RESET |
ad9e6ae1 | 1835 | SV *sv; |
ff06c6b2 | 1836 | #endif |
f3548bdc | 1837 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1838 | if (!PL_curpad) |
1839 | return; | |
1840 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1841 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1842 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1843 | if (!po) |
1844 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1845 | ||
1846 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1847 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1848 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1849 | ); | |
1850 | ||
53de1311 | 1851 | #ifndef USE_PAD_RESET |
ad9e6ae1 DM |
1852 | sv = PL_curpad[po]; |
1853 | if (sv && sv != &PL_sv_undef && !SvPADMY(sv)) | |
1854 | SvFLAGS(sv) &= ~SVs_PADTMP; | |
1855 | ||
dd2155a4 DM |
1856 | if ((I32)po < PL_padix) |
1857 | PL_padix = po - 1; | |
53d3c048 | 1858 | #endif |
dd2155a4 DM |
1859 | } |
1860 | ||
dd2155a4 | 1861 | /* |
cc76b5cc | 1862 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1863 | |
1864 | Dump the contents of a padlist | |
1865 | ||
1866 | =cut | |
1867 | */ | |
1868 | ||
1869 | void | |
1870 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1871 | { | |
e1ec3a88 AL |
1872 | const AV *pad_name; |
1873 | const AV *pad; | |
dd2155a4 DM |
1874 | SV **pname; |
1875 | SV **ppad; | |
dd2155a4 DM |
1876 | I32 ix; |
1877 | ||
7918f24d NC |
1878 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1879 | ||
dd2155a4 DM |
1880 | if (!padlist) { |
1881 | return; | |
1882 | } | |
86d2498c FC |
1883 | pad_name = *PadlistARRAY(padlist); |
1884 | pad = PadlistARRAY(padlist)[1]; | |
dd2155a4 DM |
1885 | pname = AvARRAY(pad_name); |
1886 | ppad = AvARRAY(pad); | |
1887 | Perl_dump_indent(aTHX_ level, file, | |
1888 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1889 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1890 | ); | |
1891 | ||
1892 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1893 | const SV *namesv = pname[ix]; |
325e1816 | 1894 | if (namesv && !PadnameLEN(namesv)) { |
a0714e2c | 1895 | namesv = NULL; |
dd2155a4 DM |
1896 | } |
1897 | if (namesv) { | |
ee6cee0c DM |
1898 | if (SvFAKE(namesv)) |
1899 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1900 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1901 | (int) ix, |
1902 | PTR2UV(ppad[ix]), | |
1903 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1904 | SvPVX_const(namesv), |
809abb02 NC |
1905 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1906 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1907 | |
ee6cee0c DM |
1908 | ); |
1909 | else | |
1910 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1911 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1912 | (int) ix, |
1913 | PTR2UV(ppad[ix]), | |
1914 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1915 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1916 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1917 | SvPVX_const(namesv) |
ee6cee0c | 1918 | ); |
dd2155a4 DM |
1919 | } |
1920 | else if (full) { | |
1921 | Perl_dump_indent(aTHX_ level+1, file, | |
1922 | "%2d. 0x%"UVxf"<%lu>\n", | |
1923 | (int) ix, | |
1924 | PTR2UV(ppad[ix]), | |
1925 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1926 | ); | |
1927 | } | |
1928 | } | |
1929 | } | |
1930 | ||
cc76b5cc | 1931 | #ifdef DEBUGGING |
dd2155a4 DM |
1932 | |
1933 | /* | |
cc76b5cc | 1934 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1935 | |
1936 | dump the contents of a CV | |
1937 | ||
1938 | =cut | |
1939 | */ | |
1940 | ||
dd2155a4 | 1941 | STATIC void |
e1ec3a88 | 1942 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1943 | { |
53c1dcc0 | 1944 | const CV * const outside = CvOUTSIDE(cv); |
b70d5558 | 1945 | PADLIST* const padlist = CvPADLIST(cv); |
dd2155a4 | 1946 | |
7918f24d NC |
1947 | PERL_ARGS_ASSERT_CV_DUMP; |
1948 | ||
dd2155a4 DM |
1949 | PerlIO_printf(Perl_debug_log, |
1950 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1951 | title, | |
1952 | PTR2UV(cv), | |
1953 | (CvANON(cv) ? "ANON" | |
71f882da | 1954 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1955 | : (cv == PL_main_cv) ? "MAIN" |
1956 | : CvUNIQUE(cv) ? "UNIQUE" | |
1957 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1958 | PTR2UV(outside), | |
1959 | (!outside ? "null" | |
1960 | : CvANON(outside) ? "ANON" | |
1961 | : (outside == PL_main_cv) ? "MAIN" | |
1962 | : CvUNIQUE(outside) ? "UNIQUE" | |
1963 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1964 | ||
1965 | PerlIO_printf(Perl_debug_log, | |
1966 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1967 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1968 | } | |
dd2155a4 | 1969 | |
cc76b5cc | 1970 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1971 | |
1972 | /* | |
cc76b5cc | 1973 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1974 | |
cc76b5cc Z |
1975 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1976 | of the function: its code, pad structure, and other attributes. | |
1977 | The prototype is combined with a capture of outer lexicals to which the | |
1978 | code refers, which are taken from the currently-executing instance of | |
1979 | the immediately surrounding code. | |
dd2155a4 DM |
1980 | |
1981 | =cut | |
1982 | */ | |
1983 | ||
e10681aa FC |
1984 | static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside); |
1985 | ||
1986 | static void | |
5fab0186 | 1987 | S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside, bool newcv) |
dd2155a4 | 1988 | { |
dd2155a4 | 1989 | I32 ix; |
b70d5558 | 1990 | PADLIST* const protopadlist = CvPADLIST(proto); |
9ef8d569 | 1991 | PAD *const protopad_name = *PadlistARRAY(protopadlist); |
86d2498c | 1992 | const PAD *const protopad = PadlistARRAY(protopadlist)[1]; |
53c1dcc0 AL |
1993 | SV** const pname = AvARRAY(protopad_name); |
1994 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1995 | const I32 fname = AvFILLp(protopad_name); |
1996 | const I32 fpad = AvFILLp(protopad); | |
b5c19bd7 | 1997 | SV** outpad; |
71f882da | 1998 | long depth; |
e07561e6 | 1999 | bool subclones = FALSE; |
7918f24d | 2000 | |
dd2155a4 DM |
2001 | assert(!CvUNIQUE(proto)); |
2002 | ||
1b5aaca6 FC |
2003 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
2004 | * reliable. The currently-running sub is always the one we need to | |
2005 | * close over. | |
8d88fe29 FC |
2006 | * For my subs, the currently-running sub may not be the one we want. |
2007 | * We have to check whether it is a clone of CvOUTSIDE. | |
1b5aaca6 FC |
2008 | * Note that in general for formats, CvOUTSIDE != find_runcv. |
2009 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 2010 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 2011 | */ |
71f882da | 2012 | |
e07561e6 | 2013 | if (!outside) { |
ebfebee4 | 2014 | if (CvWEAKOUTSIDE(proto)) |
71f882da | 2015 | outside = find_runcv(NULL); |
e07561e6 | 2016 | else { |
af41786f | 2017 | outside = CvOUTSIDE(proto); |
db4cf31d FC |
2018 | if ((CvCLONE(outside) && ! CvCLONED(outside)) |
2019 | || !CvPADLIST(outside) | |
8771da69 FC |
2020 | || PadlistNAMES(CvPADLIST(outside)) |
2021 | != protopadlist->xpadl_outid) { | |
db4cf31d | 2022 | outside = find_runcv_where( |
a56015b9 | 2023 | FIND_RUNCV_padid_eq, PTR2IV(protopadlist->xpadl_outid), NULL |
70794f7b | 2024 | ); |
db4cf31d | 2025 | /* outside could be null */ |
5dff782d | 2026 | } |
e07561e6 | 2027 | } |
5dff782d | 2028 | } |
db4cf31d | 2029 | depth = outside ? CvDEPTH(outside) : 0; |
71f882da DM |
2030 | if (!depth) |
2031 | depth = 1; | |
b5c19bd7 | 2032 | |
dd2155a4 DM |
2033 | ENTER; |
2034 | SAVESPTR(PL_compcv); | |
e07561e6 | 2035 | PL_compcv = cv; |
5fab0186 | 2036 | if (newcv) SAVEFREESV(cv); /* in case of fatal warnings */ |
dd2155a4 | 2037 | |
a0d2bbd5 FC |
2038 | if (CvHASEVAL(cv)) |
2039 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
dd2155a4 | 2040 | |
cbacc9aa | 2041 | SAVESPTR(PL_comppad_name); |
9ef8d569 | 2042 | PL_comppad_name = protopad_name; |
b7787f18 | 2043 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 2044 | |
b5c19bd7 | 2045 | av_fill(PL_comppad, fpad); |
dd2155a4 | 2046 | |
dd2155a4 DM |
2047 | PL_curpad = AvARRAY(PL_comppad); |
2048 | ||
db4cf31d | 2049 | outpad = outside && CvPADLIST(outside) |
86d2498c | 2050 | ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth]) |
f2ead8b8 | 2051 | : NULL; |
8771da69 FC |
2052 | if (outpad) |
2053 | CvPADLIST(cv)->xpadl_outid = PadlistNAMES(CvPADLIST(outside)); | |
b5c19bd7 | 2054 | |
dd2155a4 | 2055 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
2056 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
2057 | SV *sv = NULL; | |
325e1816 | 2058 | if (namesv && PadnameLEN(namesv)) { /* lexical */ |
f2047bf1 FC |
2059 | if (PadnameIsOUR(namesv)) { /* or maybe not so lexical */ |
2060 | NOOP; | |
2061 | } | |
2062 | else { | |
b5c19bd7 | 2063 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
5aec98df FC |
2064 | /* formats may have an inactive, or even undefined, parent; |
2065 | but state vars are always available. */ | |
f2ead8b8 | 2066 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe | 2067 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
db4cf31d | 2068 | && (!outside || !CvDEPTH(outside))) ) { |
445f13ff | 2069 | S_unavailable(aTHX_ namesv); |
a0714e2c | 2070 | sv = NULL; |
71f882da | 2071 | } |
33894c1a | 2072 | else |
f84c484e | 2073 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2074 | } |
71f882da | 2075 | if (!sv) { |
b15aece3 | 2076 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 2077 | if (sigil == '&') |
e07561e6 FC |
2078 | /* If there are state subs, we need to clone them, too. |
2079 | But they may need to close over variables we have | |
2080 | not cloned yet. So we will have to do a second | |
2081 | pass. Furthermore, there may be state subs clos- | |
2082 | ing over other state subs’ entries, so we have | |
2083 | to put a stub here and then clone into it on the | |
2084 | second pass. */ | |
6d5c2147 FC |
2085 | if (SvPAD_STATE(namesv) && !CvCLONED(ppad[ix])) { |
2086 | assert(SvTYPE(ppad[ix]) == SVt_PVCV); | |
2087 | subclones = 1; | |
2088 | sv = newSV_type(SVt_PVCV); | |
2089 | } | |
2090 | else if (PadnameLEN(namesv)>1 && !PadnameIsOUR(namesv)) | |
2091 | { | |
2092 | /* my sub */ | |
81df9f6f FC |
2093 | /* Just provide a stub, but name it. It will be |
2094 | upgrade to the real thing on scope entry. */ | |
2095 | sv = newSV_type(SVt_PVCV); | |
cf748c3c FC |
2096 | CvNAME_HEK_set( |
2097 | sv, | |
2098 | share_hek(SvPVX_const(namesv)+1, | |
2099 | SvCUR(namesv) - 1 | |
2100 | * (SvUTF8(namesv) ? -1 : 1), | |
2101 | 0) | |
2102 | ); | |
6d5c2147 FC |
2103 | } |
2104 | else sv = SvREFCNT_inc(ppad[ix]); | |
e1ec3a88 | 2105 | else if (sigil == '@') |
ad64d0ec | 2106 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2107 | else if (sigil == '%') |
ad64d0ec | 2108 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2109 | else |
561b68a9 | 2110 | sv = newSV(0); |
235cc2e3 | 2111 | SvPADMY_on(sv); |
0d3b281c | 2112 | /* reset the 'assign only once' flag on each state var */ |
e07561e6 | 2113 | if (sigil != '&' && SvPAD_STATE(namesv)) |
0d3b281c | 2114 | SvPADSTALE_on(sv); |
dd2155a4 | 2115 | } |
f2047bf1 | 2116 | } |
dd2155a4 | 2117 | } |
3a6ce63a | 2118 | else if (IS_PADGV(ppad[ix]) || (namesv && PadnamePV(namesv))) { |
f84c484e | 2119 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2120 | } |
2121 | else { | |
561b68a9 | 2122 | sv = newSV(0); |
dd2155a4 | 2123 | SvPADTMP_on(sv); |
dd2155a4 | 2124 | } |
71f882da | 2125 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2126 | } |
2127 | ||
e07561e6 FC |
2128 | if (subclones) |
2129 | for (ix = fpad; ix > 0; ix--) { | |
2130 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; | |
2131 | if (namesv && namesv != &PL_sv_undef && !SvFAKE(namesv) | |
2132 | && SvPVX_const(namesv)[0] == '&' && SvPAD_STATE(namesv)) | |
2133 | S_cv_clone(aTHX_ (CV *)ppad[ix], (CV *)PL_curpad[ix], cv); | |
2134 | } | |
2135 | ||
5fab0186 | 2136 | if (newcv) SvREFCNT_inc_simple_void_NN(cv); |
e10681aa FC |
2137 | LEAVE; |
2138 | } | |
2139 | ||
2140 | static CV * | |
2141 | S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside) | |
2142 | { | |
20b7effb | 2143 | #ifdef USE_ITHREADS |
c04ef36e | 2144 | dVAR; |
20b7effb | 2145 | #endif |
5fab0186 | 2146 | const bool newcv = !cv; |
c04ef36e | 2147 | |
e10681aa FC |
2148 | assert(!CvUNIQUE(proto)); |
2149 | ||
2150 | if (!cv) cv = MUTABLE_CV(newSV_type(SvTYPE(proto))); | |
2151 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC | |
2152 | |CVf_SLABBED); | |
2153 | CvCLONED_on(cv); | |
2154 | ||
2155 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) | |
2156 | : CvFILE(proto); | |
2157 | if (CvNAMED(proto)) | |
2e800d79 | 2158 | CvNAME_HEK_set(cv, share_hek_hek(CvNAME_HEK(proto))); |
e10681aa FC |
2159 | else CvGV_set(cv,CvGV(proto)); |
2160 | CvSTASH_set(cv, CvSTASH(proto)); | |
2161 | OP_REFCNT_LOCK; | |
2162 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
2163 | OP_REFCNT_UNLOCK; | |
2164 | CvSTART(cv) = CvSTART(proto); | |
2165 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
2166 | ||
fdf416b6 | 2167 | if (SvPOK(proto)) { |
e10681aa | 2168 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
fdf416b6 BF |
2169 | if (SvUTF8(proto)) |
2170 | SvUTF8_on(MUTABLE_SV(cv)); | |
2171 | } | |
e10681aa FC |
2172 | if (SvMAGIC(proto)) |
2173 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
2174 | ||
5fab0186 | 2175 | if (CvPADLIST(proto)) S_cv_clone_pad(aTHX_ proto, cv, outside, newcv); |
e10681aa | 2176 | |
dd2155a4 DM |
2177 | DEBUG_Xv( |
2178 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
e10681aa | 2179 | if (CvOUTSIDE(cv)) cv_dump(CvOUTSIDE(cv), "Outside"); |
dd2155a4 DM |
2180 | cv_dump(proto, "Proto"); |
2181 | cv_dump(cv, "To"); | |
2182 | ); | |
2183 | ||
d3f8a934 AB |
2184 | if (CvCONST(cv)) { |
2185 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: | |
2186 | * The prototype was marked as a candiate for const-ization, | |
2187 | * so try to grab the current const value, and if successful, | |
2188 | * turn into a const sub: | |
2189 | */ | |
2190 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); | |
2191 | if (const_sv) { | |
2192 | SvREFCNT_dec_NN(cv); | |
2193 | /* For this calling case, op_const_sv returns a *copy*, which we | |
2194 | donate to newCONSTSUB. Yes, this is ugly, and should be killed. | |
2195 | Need to fix how lib/constant.pm works to eliminate this. */ | |
2196 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); | |
2197 | } | |
2198 | else { | |
2199 | CvCONST_off(cv); | |
2200 | } | |
2201 | } | |
2202 | ||
dd2155a4 DM |
2203 | return cv; |
2204 | } | |
2205 | ||
e07561e6 FC |
2206 | CV * |
2207 | Perl_cv_clone(pTHX_ CV *proto) | |
2208 | { | |
2209 | PERL_ARGS_ASSERT_CV_CLONE; | |
2210 | ||
fead5351 | 2211 | if (!CvPADLIST(proto)) Perl_croak(aTHX_ "panic: no pad in cv_clone"); |
e07561e6 FC |
2212 | return S_cv_clone(aTHX_ proto, NULL, NULL); |
2213 | } | |
2214 | ||
6d5c2147 FC |
2215 | /* Called only by pp_clonecv */ |
2216 | CV * | |
2217 | Perl_cv_clone_into(pTHX_ CV *proto, CV *target) | |
2218 | { | |
2219 | PERL_ARGS_ASSERT_CV_CLONE_INTO; | |
2220 | cv_undef(target); | |
2221 | return S_cv_clone(aTHX_ proto, target, NULL); | |
2222 | } | |
2223 | ||
dd2155a4 | 2224 | /* |
cc76b5cc | 2225 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2226 | |
2227 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
72d33970 | 2228 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
7dafbf52 | 2229 | moved to a pre-existing CV struct. |
dd2155a4 DM |
2230 | |
2231 | =cut | |
2232 | */ | |
2233 | ||
2234 | void | |
2235 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2236 | { | |
2237 | I32 ix; | |
86d2498c FC |
2238 | AV * const comppad_name = PadlistARRAY(padlist)[0]; |
2239 | AV * const comppad = PadlistARRAY(padlist)[1]; | |
53c1dcc0 AL |
2240 | SV ** const namepad = AvARRAY(comppad_name); |
2241 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2242 | |
2243 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2244 | PERL_UNUSED_ARG(old_cv); |
2245 | ||
dd2155a4 | 2246 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2247 | const SV * const namesv = namepad[ix]; |
09a30bc4 | 2248 | if (namesv && namesv != &PL_sv_undef && !SvPAD_STATE(namesv) |
b15aece3 | 2249 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2250 | { |
e09ac076 | 2251 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
0afba48f FC |
2252 | MAGIC * const mg = |
2253 | SvMAGICAL(curpad[ix]) | |
2254 | ? mg_find(curpad[ix], PERL_MAGIC_proto) | |
2255 | : NULL; | |
2256 | CV * const innercv = MUTABLE_CV(mg ? mg->mg_obj : curpad[ix]); | |
2257 | if (CvOUTSIDE(innercv) == old_cv) { | |
1f122f9b FC |
2258 | if (!CvWEAKOUTSIDE(innercv)) { |
2259 | SvREFCNT_dec(old_cv); | |
2260 | SvREFCNT_inc_simple_void_NN(new_cv); | |
2261 | } | |
0afba48f FC |
2262 | CvOUTSIDE(innercv) = new_cv; |
2263 | } | |
e09ac076 FC |
2264 | } |
2265 | else { /* format reference */ | |
2266 | SV * const rv = curpad[ix]; | |
2267 | CV *innercv; | |
2268 | if (!SvOK(rv)) continue; | |
2269 | assert(SvROK(rv)); | |
2270 | assert(SvWEAKREF(rv)); | |
2271 | innercv = (CV *)SvRV(rv); | |
2272 | assert(!CvWEAKOUTSIDE(innercv)); | |
2273 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2274 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2275 | } | |
dd2155a4 DM |
2276 | } |
2277 | } | |
2278 | } | |
2279 | ||
2280 | /* | |
cc76b5cc | 2281 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2282 | |
2283 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2284 | this depth, in which case don't bother creating a new one. Then give |
2285 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2286 | |
2287 | =cut | |
2288 | */ | |
2289 | ||
2290 | void | |
26019298 | 2291 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2292 | { |
7918f24d NC |
2293 | PERL_ARGS_ASSERT_PAD_PUSH; |
2294 | ||
86d2498c FC |
2295 | if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) { |
2296 | PAD** const svp = PadlistARRAY(padlist); | |
44f8325f AL |
2297 | AV* const newpad = newAV(); |
2298 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2299 | I32 ix = AvFILLp((const AV *)svp[1]); |
2300 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2301 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2302 | AV *av; |
2303 | ||
dd2155a4 | 2304 | for ( ;ix > 0; ix--) { |
325e1816 | 2305 | if (names_fill >= ix && PadnameLEN(names[ix])) { |
b15aece3 | 2306 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2307 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2308 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2309 | || sigil == '&') | |
2310 | { | |
dd2155a4 DM |
2311 | /* outer lexical or anon code */ |
2312 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2313 | } | |
2314 | else { /* our own lexical */ | |
26019298 AL |
2315 | SV *sv; |
2316 | if (sigil == '@') | |
ad64d0ec | 2317 | sv = MUTABLE_SV(newAV()); |
26019298 | 2318 | else if (sigil == '%') |
ad64d0ec | 2319 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2320 | else |
561b68a9 | 2321 | sv = newSV(0); |
26019298 | 2322 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2323 | SvPADMY_on(sv); |
2324 | } | |
2325 | } | |
5d719198 | 2326 | else if (IS_PADGV(oldpad[ix]) || PadnamePV(names[ix])) { |
f84c484e | 2327 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2328 | } |
2329 | else { | |
2330 | /* save temporaries on recursion? */ | |
561b68a9 | 2331 | SV * const sv = newSV(0); |
26019298 | 2332 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2333 | SvPADTMP_on(sv); |
2334 | } | |
2335 | } | |
26019298 | 2336 | av = newAV(); |
ad64d0ec | 2337 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2338 | AvREIFY_only(av); |
26019298 | 2339 | |
7261499d | 2340 | padlist_store(padlist, depth, newpad); |
dd2155a4 DM |
2341 | } |
2342 | } | |
b21dc031 | 2343 | |
cc76b5cc Z |
2344 | /* |
2345 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2346 | ||
2347 | Looks up the type of the lexical variable at position I<po> in the | |
2348 | currently-compiling pad. If the variable is typed, the stash of the | |
2349 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2350 | ||
2351 | =cut | |
2352 | */ | |
b21dc031 AL |
2353 | |
2354 | HV * | |
2355 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2356 | { | |
3769e90d DD |
2357 | SV* const av = PAD_COMPNAME_SV(po); |
2358 | if ( SvPAD_TYPED(av) ) { | |
2359 | return SvSTASH(av); | |
b21dc031 | 2360 | } |
5c284bb0 | 2361 | return NULL; |
b21dc031 | 2362 | } |
66610fdd | 2363 | |
d5b1589c NC |
2364 | #if defined(USE_ITHREADS) |
2365 | ||
2366 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2367 | ||
cc76b5cc | 2368 | /* |
b70d5558 | 2369 | =for apidoc padlist_dup |
cc76b5cc Z |
2370 | |
2371 | Duplicates a pad. | |
2372 | ||
2373 | =cut | |
2374 | */ | |
2375 | ||
b70d5558 FC |
2376 | PADLIST * |
2377 | Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param) | |
d5b1589c | 2378 | { |
7261499d FC |
2379 | PADLIST *dstpad; |
2380 | bool cloneall; | |
2381 | PADOFFSET max; | |
2382 | ||
d5b1589c NC |
2383 | PERL_ARGS_ASSERT_PADLIST_DUP; |
2384 | ||
2385 | if (!srcpad) | |
2386 | return NULL; | |
2387 | ||
7261499d | 2388 | cloneall = param->flags & CLONEf_COPY_STACKS |
86d2498c FC |
2389 | || SvREFCNT(PadlistARRAY(srcpad)[1]) > 1; |
2390 | assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1); | |
7261499d | 2391 | |
86d2498c | 2392 | max = cloneall ? PadlistMAX(srcpad) : 1; |
7261499d FC |
2393 | |
2394 | Newx(dstpad, 1, PADLIST); | |
2395 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
86d2498c FC |
2396 | PadlistMAX(dstpad) = max; |
2397 | Newx(PadlistARRAY(dstpad), max + 1, PAD *); | |
7261499d FC |
2398 | |
2399 | if (cloneall) { | |
2400 | PADOFFSET depth; | |
2401 | for (depth = 0; depth <= max; ++depth) | |
86d2498c FC |
2402 | PadlistARRAY(dstpad)[depth] = |
2403 | av_dup_inc(PadlistARRAY(srcpad)[depth], param); | |
6de654a5 NC |
2404 | } else { |
2405 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2406 | to build anything other than the first level of pads. */ | |
86d2498c | 2407 | I32 ix = AvFILLp(PadlistARRAY(srcpad)[1]); |
6de654a5 | 2408 | AV *pad1; |
86d2498c FC |
2409 | const I32 names_fill = AvFILLp(PadlistARRAY(srcpad)[0]); |
2410 | const PAD *const srcpad1 = PadlistARRAY(srcpad)[1]; | |
6de654a5 NC |
2411 | SV **oldpad = AvARRAY(srcpad1); |
2412 | SV **names; | |
2413 | SV **pad1a; | |
2414 | AV *args; | |
6de654a5 | 2415 | |
86d2498c FC |
2416 | PadlistARRAY(dstpad)[0] = |
2417 | av_dup_inc(PadlistARRAY(srcpad)[0], param); | |
2418 | names = AvARRAY(PadlistARRAY(dstpad)[0]); | |
6de654a5 NC |
2419 | |
2420 | pad1 = newAV(); | |
2421 | ||
2422 | av_extend(pad1, ix); | |
86d2498c | 2423 | PadlistARRAY(dstpad)[1] = pad1; |
6de654a5 | 2424 | pad1a = AvARRAY(pad1); |
6de654a5 NC |
2425 | |
2426 | if (ix > -1) { | |
2427 | AvFILLp(pad1) = ix; | |
2428 | ||
2429 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2430 | if (!oldpad[ix]) { |
2431 | pad1a[ix] = NULL; | |
ce0d59fd FC |
2432 | } else if (names_fill >= ix && names[ix] && |
2433 | PadnameLEN(names[ix])) { | |
05d04d9c NC |
2434 | const char sigil = SvPVX_const(names[ix])[0]; |
2435 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2436 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2437 | || sigil == '&') | |
2438 | { | |
2439 | /* outer lexical or anon code */ | |
2440 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2441 | } | |
2442 | else { /* our own lexical */ | |
adf8f095 NC |
2443 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2444 | /* This is a work around for how the current | |
2445 | implementation of ?{ } blocks in regexps | |
2446 | interacts with lexicals. */ | |
05d04d9c NC |
2447 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2448 | } else { | |
2449 | SV *sv; | |
2450 | ||
2451 | if (sigil == '@') | |
2452 | sv = MUTABLE_SV(newAV()); | |
2453 | else if (sigil == '%') | |
2454 | sv = MUTABLE_SV(newHV()); | |
2455 | else | |
2456 | sv = newSV(0); | |
2457 | pad1a[ix] = sv; | |
2458 | SvPADMY_on(sv); | |
2459 | } | |
2460 | } | |
2461 | } | |
ce0d59fd FC |
2462 | else if (IS_PADGV(oldpad[ix]) |
2463 | || ( names_fill >= ix && names[ix] | |
2464 | && PadnamePV(names[ix]) )) { | |
05d04d9c NC |
2465 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2466 | } | |
2467 | else { | |
2468 | /* save temporaries on recursion? */ | |
2469 | SV * const sv = newSV(0); | |
2470 | pad1a[ix] = sv; | |
2471 | ||
2472 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2473 | FIXTHAT before merging this branch. | |
2474 | (And I know how to) */ | |
2475 | if (SvPADMY(oldpad[ix])) | |
2476 | SvPADMY_on(sv); | |
2477 | else | |
2478 | SvPADTMP_on(sv); | |
2479 | } | |
6de654a5 NC |
2480 | } |
2481 | ||
2482 | if (oldpad[0]) { | |
2483 | args = newAV(); /* Will be @_ */ | |
2484 | AvREIFY_only(args); | |
2485 | pad1a[0] = (SV *)args; | |
2486 | } | |
2487 | } | |
2488 | } | |
d5b1589c NC |
2489 | |
2490 | return dstpad; | |
2491 | } | |
2492 | ||
cc76b5cc | 2493 | #endif /* USE_ITHREADS */ |
d5b1589c | 2494 | |
7261499d | 2495 | PAD ** |
5aaab254 | 2496 | Perl_padlist_store(pTHX_ PADLIST *padlist, I32 key, PAD *val) |
7261499d | 2497 | { |
7261499d | 2498 | PAD **ary; |
86d2498c | 2499 | SSize_t const oldmax = PadlistMAX(padlist); |
7261499d FC |
2500 | |
2501 | PERL_ARGS_ASSERT_PADLIST_STORE; | |
2502 | ||
2503 | assert(key >= 0); | |
2504 | ||
86d2498c FC |
2505 | if (key > PadlistMAX(padlist)) { |
2506 | av_extend_guts(NULL,key,&PadlistMAX(padlist), | |
2507 | (SV ***)&PadlistARRAY(padlist), | |
2508 | (SV ***)&PadlistARRAY(padlist)); | |
2509 | Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax, | |
7261499d FC |
2510 | PAD *); |
2511 | } | |
86d2498c | 2512 | ary = PadlistARRAY(padlist); |
7261499d FC |
2513 | SvREFCNT_dec(ary[key]); |
2514 | ary[key] = val; | |
2515 | return &ary[key]; | |
2516 | } | |
2517 | ||
66610fdd RGS |
2518 | /* |
2519 | * Local variables: | |
2520 | * c-indentation-style: bsd | |
2521 | * c-basic-offset: 4 | |
14d04a33 | 2522 | * indent-tabs-mode: nil |
66610fdd RGS |
2523 | * End: |
2524 | * | |
14d04a33 | 2525 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2526 | */ |