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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 |
325e1816 FC |
59 | items. Pad slots for targets (SVs_PADTMP) and GVs end up having &PL_sv_no |
60 | "names", while slots for constants have &PL_sv_no "names" (see | |
fb090176 FC |
61 | pad_alloc()). That &PL_sv_no is used is an implementation detail subject |
62 | to change. To test for it, use C<PadnamePV(name) && !PadnameLEN(name)>. | |
dd2155a4 | 63 | |
58a9b2fe | 64 | Only my/our variable (SvPADMY/PADNAME_isOUR) slots get valid names. |
dd2155a4 DM |
65 | The rest are op targets/GVs/constants which are statically allocated |
66 | or resolved at compile time. These don't have names by which they | |
58a9b2fe | 67 | can be looked up from Perl code at run time through eval"" the way |
dd2155a4 DM |
68 | my/our variables can be. Since they can't be looked up by "name" |
69 | but only by their index allocated at compile time (which is usually | |
70 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
71 | ||
72 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 | 73 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
61f4bfbf DM |
74 | which the name is valid (accessed through the macros COP_SEQ_RANGE_LOW and |
75 | _HIGH). During compilation, these fields may hold the special value | |
76 | PERL_PADSEQ_INTRO to indicate various stages: | |
0d311cdb DM |
77 | |
78 | COP_SEQ_RANGE_LOW _HIGH | |
79 | ----------------- ----- | |
80 | PERL_PADSEQ_INTRO 0 variable not yet introduced: { my ($x | |
81 | valid-seq# PERL_PADSEQ_INTRO variable in scope: { my ($x) | |
82 | valid-seq# valid-seq# compilation of scope complete: { my ($x) } | |
83 | ||
84 | For typed lexicals name SV is SVt_PVMG and SvSTASH | |
3441fb63 | 85 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 | 86 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 87 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 88 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 89 | |
c44737a2 FC |
90 | If PADNAME_OUTER (SvFAKE) is set on the |
91 | name SV, then that slot in the frame AV is | |
72d33970 | 92 | a REFCNT'ed reference to a lexical from "outside". In this case, |
3441fb63 | 93 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
72d33970 | 94 | in scope throughout. Instead xhigh stores some flags containing info about |
b5c19bd7 | 95 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 96 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
97 | within the parent's pad where the lexical's value is stored, to make |
98 | cloning quicker. | |
dd2155a4 | 99 | |
58a9b2fe | 100 | If the 'name' is '&' the corresponding entry in the PAD |
dd2155a4 | 101 | is a CV representing a possible closure. |
c44737a2 FC |
102 | (PADNAME_OUTER and name of '&' is not a |
103 | meaningful combination currently but could | |
dd2155a4 DM |
104 | become so if C<my sub foo {}> is implemented.) |
105 | ||
71f882da DM |
106 | Note that formats are treated as anon subs, and are cloned each time |
107 | write is called (if necessary). | |
108 | ||
ab8e66c1 | 109 | The flag SVs_PADSTALE is cleared on lexicals each time the my() is executed, |
58a9b2fe FC |
110 | and set on scope exit. This allows the |
111 | 'Variable $x is not available' warning | |
e6e7068b DM |
112 | to be generated in evals, such as |
113 | ||
114 | { my $x = 1; sub f { eval '$x'} } f(); | |
115 | ||
58a9b2fe | 116 | For state vars, SVs_PADSTALE is overloaded to mean 'not yet initialised'. |
d1186544 | 117 | |
36c300bb | 118 | =for apidoc AmxU|PADNAMELIST *|PL_comppad_name |
cc76b5cc Z |
119 | |
120 | During compilation, this points to the array containing the names part | |
121 | of the pad for the currently-compiling code. | |
122 | ||
36c300bb | 123 | =for apidoc AmxU|PAD *|PL_comppad |
cc76b5cc Z |
124 | |
125 | During compilation, this points to the array containing the values | |
126 | part of the pad for the currently-compiling code. (At runtime a CV may | |
127 | have many such value arrays; at compile time just one is constructed.) | |
128 | At runtime, this points to the array containing the currently-relevant | |
129 | values for the pad for the currently-executing code. | |
130 | ||
131 | =for apidoc AmxU|SV **|PL_curpad | |
132 | ||
133 | Points directly to the body of the L</PL_comppad> array. | |
c14a2249 | 134 | (I.e., this is C<PAD_ARRAY(PL_comppad)>.) |
cc76b5cc | 135 | |
dd2155a4 DM |
136 | =cut |
137 | */ | |
138 | ||
139 | ||
140 | #include "EXTERN.h" | |
141 | #define PERL_IN_PAD_C | |
142 | #include "perl.h" | |
952306ac | 143 | #include "keywords.h" |
dd2155a4 | 144 | |
3441fb63 NC |
145 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
146 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
147 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
148 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 149 | |
3441fb63 NC |
150 | #define PARENT_PAD_INDEX_set(sv,val) \ |
151 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
152 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
153 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 154 | |
cc76b5cc | 155 | /* |
5b16296c BF |
156 | This is basically sv_eq_flags() in sv.c, but we avoid the magic |
157 | and bytes checking. | |
158 | */ | |
159 | ||
76d60a53 NC |
160 | static bool |
161 | sv_eq_pvn_flags(pTHX_ const SV *sv, const char* pv, const STRLEN pvlen, const U32 flags) { | |
5b16296c BF |
162 | if ( (SvUTF8(sv) & SVf_UTF8 ) != (flags & SVf_UTF8) ) { |
163 | const char *pv1 = SvPVX_const(sv); | |
164 | STRLEN cur1 = SvCUR(sv); | |
165 | const char *pv2 = pv; | |
166 | STRLEN cur2 = pvlen; | |
167 | if (PL_encoding) { | |
168 | SV* svrecode = NULL; | |
169 | if (SvUTF8(sv)) { | |
170 | svrecode = newSVpvn(pv2, cur2); | |
171 | sv_recode_to_utf8(svrecode, PL_encoding); | |
172 | pv2 = SvPV_const(svrecode, cur2); | |
173 | } | |
174 | else { | |
175 | svrecode = newSVpvn(pv1, cur1); | |
176 | sv_recode_to_utf8(svrecode, PL_encoding); | |
177 | pv1 = SvPV_const(svrecode, cur1); | |
178 | } | |
fc2b2dca | 179 | SvREFCNT_dec_NN(svrecode); |
5b16296c BF |
180 | } |
181 | if (flags & SVf_UTF8) | |
182 | return (bytes_cmp_utf8( | |
183 | (const U8*)pv1, cur1, | |
184 | (const U8*)pv2, cur2) == 0); | |
185 | else | |
186 | return (bytes_cmp_utf8( | |
187 | (const U8*)pv2, cur2, | |
188 | (const U8*)pv1, cur1) == 0); | |
189 | } | |
190 | else | |
191 | return ((SvPVX_const(sv) == pv) | |
192 | || memEQ(SvPVX_const(sv), pv, pvlen)); | |
193 | } | |
194 | ||
195 | ||
196 | /* | |
cc76b5cc | 197 | =for apidoc Am|PADLIST *|pad_new|int flags |
dd2155a4 | 198 | |
cc76b5cc Z |
199 | Create a new padlist, updating the global variables for the |
200 | currently-compiling padlist to point to the new padlist. The following | |
201 | flags can be OR'ed together: | |
dd2155a4 DM |
202 | |
203 | padnew_CLONE this pad is for a cloned CV | |
cc76b5cc | 204 | padnew_SAVE save old globals on the save stack |
dd2155a4 DM |
205 | padnew_SAVESUB also save extra stuff for start of sub |
206 | ||
207 | =cut | |
208 | */ | |
209 | ||
210 | PADLIST * | |
c7c737cb | 211 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 212 | { |
7261499d FC |
213 | PADLIST *padlist; |
214 | PAD *padname, *pad; | |
215 | PAD **ary; | |
dd2155a4 | 216 | |
f3548bdc DM |
217 | ASSERT_CURPAD_LEGAL("pad_new"); |
218 | ||
dd2155a4 DM |
219 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
220 | * vars (based on flags) rather than storing vals + addresses for | |
221 | * each individually. Also see pad_block_start. | |
222 | * XXX DAPM Try to see whether all these conditionals are required | |
223 | */ | |
224 | ||
225 | /* save existing state, ... */ | |
226 | ||
227 | if (flags & padnew_SAVE) { | |
3979c56f | 228 | SAVECOMPPAD(); |
dd2155a4 | 229 | if (! (flags & padnew_CLONE)) { |
cbacc9aa | 230 | SAVESPTR(PL_comppad_name); |
dd2155a4 DM |
231 | SAVEI32(PL_padix); |
232 | SAVEI32(PL_comppad_name_fill); | |
233 | SAVEI32(PL_min_intro_pending); | |
234 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 235 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 236 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 237 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
238 | } |
239 | } | |
240 | } | |
241 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
242 | * saved - check at some pt that this is okay */ | |
243 | ||
244 | /* ... create new pad ... */ | |
245 | ||
7261499d | 246 | Newxz(padlist, 1, PADLIST); |
dd2155a4 DM |
247 | pad = newAV(); |
248 | ||
249 | if (flags & padnew_CLONE) { | |
250 | /* XXX DAPM I dont know why cv_clone needs it | |
251 | * doing differently yet - perhaps this separate branch can be | |
252 | * dispensed with eventually ??? | |
253 | */ | |
254 | ||
e1ec3a88 | 255 | AV * const a0 = newAV(); /* will be @_ */ |
ad64d0ec | 256 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 257 | AvREIFY_only(a0); |
9ef8d569 FC |
258 | |
259 | padname = (PAD *)SvREFCNT_inc_simple_NN(PL_comppad_name); | |
dd2155a4 DM |
260 | } |
261 | else { | |
a0714e2c | 262 | av_store(pad, 0, NULL); |
9ef8d569 | 263 | padname = newAV(); |
7db6405c | 264 | AvPAD_NAMELIST_on(padname); |
ce0d59fd | 265 | av_store(padname, 0, &PL_sv_undef); |
dd2155a4 DM |
266 | } |
267 | ||
7a6072a8 NC |
268 | /* Most subroutines never recurse, hence only need 2 entries in the padlist |
269 | array - names, and depth=1. The default for av_store() is to allocate | |
270 | 0..3, and even an explicit call to av_extend() with <3 will be rounded | |
271 | up, so we inline the allocation of the array here. */ | |
7261499d | 272 | Newx(ary, 2, PAD *); |
86d2498c FC |
273 | PadlistMAX(padlist) = 1; |
274 | PadlistARRAY(padlist) = ary; | |
7261499d FC |
275 | ary[0] = padname; |
276 | ary[1] = pad; | |
dd2155a4 DM |
277 | |
278 | /* ... then update state variables */ | |
279 | ||
403799bf NC |
280 | PL_comppad = pad; |
281 | PL_curpad = AvARRAY(pad); | |
dd2155a4 DM |
282 | |
283 | if (! (flags & padnew_CLONE)) { | |
9ef8d569 | 284 | PL_comppad_name = padname; |
dd2155a4 DM |
285 | PL_comppad_name_fill = 0; |
286 | PL_min_intro_pending = 0; | |
287 | PL_padix = 0; | |
b5c19bd7 | 288 | PL_cv_has_eval = 0; |
dd2155a4 DM |
289 | } |
290 | ||
291 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 292 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 293 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 294 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
295 | PTR2UV(padname), (UV)flags |
296 | ) | |
297 | ); | |
298 | ||
299 | return (PADLIST*)padlist; | |
300 | } | |
301 | ||
dd2155a4 | 302 | |
c4528262 NC |
303 | /* |
304 | =head1 Embedding Functions | |
305 | ||
306 | =for apidoc cv_undef | |
307 | ||
72d33970 | 308 | Clear out all the active components of a CV. This can happen either |
c4528262 NC |
309 | by an explicit C<undef &foo>, or by the reference count going to zero. |
310 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous | |
311 | children can still follow the full lexical scope chain. | |
312 | ||
313 | =cut | |
314 | */ | |
315 | ||
316 | void | |
317 | Perl_cv_undef(pTHX_ CV *cv) | |
318 | { | |
c2736fce | 319 | const PADLIST *padlist = CvPADLIST(cv); |
8be227ab | 320 | bool const slabbed = !!CvSLABBED(cv); |
c4528262 NC |
321 | |
322 | PERL_ARGS_ASSERT_CV_UNDEF; | |
323 | ||
324 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
325 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", | |
326 | PTR2UV(cv), PTR2UV(PL_comppad)) | |
327 | ); | |
328 | ||
bad4ae38 | 329 | if (CvFILE(cv) && CvDYNFILE(cv)) { |
c4528262 NC |
330 | Safefree(CvFILE(cv)); |
331 | } | |
332 | CvFILE(cv) = NULL; | |
dd2155a4 | 333 | |
8be227ab | 334 | CvSLABBED_off(cv); |
c4528262 NC |
335 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
336 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) | |
337 | Perl_croak(aTHX_ "Can't undef active subroutine"); | |
338 | ENTER; | |
339 | ||
340 | PAD_SAVE_SETNULLPAD(); | |
341 | ||
8be227ab | 342 | if (slabbed) OpslabREFCNT_dec_padok(OpSLAB(CvROOT(cv))); |
c4528262 NC |
343 | op_free(CvROOT(cv)); |
344 | CvROOT(cv) = NULL; | |
345 | CvSTART(cv) = NULL; | |
346 | LEAVE; | |
347 | } | |
8be227ab FC |
348 | else if (slabbed && CvSTART(cv)) { |
349 | ENTER; | |
350 | PAD_SAVE_SETNULLPAD(); | |
351 | ||
352 | /* discard any leaked ops */ | |
3ac7ff8f FC |
353 | if (PL_parser) |
354 | parser_free_nexttoke_ops(PL_parser, (OPSLAB *)CvSTART(cv)); | |
8be227ab FC |
355 | opslab_force_free((OPSLAB *)CvSTART(cv)); |
356 | CvSTART(cv) = NULL; | |
357 | ||
358 | LEAVE; | |
359 | } | |
7aef8e5b | 360 | #ifdef DEBUGGING |
eb212a1c | 361 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
8be227ab | 362 | #endif |
c4528262 | 363 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
2f14e398 | 364 | sv_unmagic((SV *)cv, PERL_MAGIC_checkcall); |
2e800d79 | 365 | if (CvNAMED(cv)) CvNAME_HEK_set(cv, NULL); |
b290562e | 366 | else CvGV_set(cv, NULL); |
c4528262 | 367 | |
c2736fce NC |
368 | /* This statement and the subsequence if block was pad_undef(). */ |
369 | pad_peg("pad_undef"); | |
370 | ||
7261499d | 371 | if (padlist) { |
c2736fce NC |
372 | I32 ix; |
373 | ||
374 | /* Free the padlist associated with a CV. | |
375 | If parts of it happen to be current, we null the relevant PL_*pad* | |
376 | global vars so that we don't have any dangling references left. | |
377 | We also repoint the CvOUTSIDE of any about-to-be-orphaned inner | |
378 | subs to the outer of this cv. */ | |
379 | ||
380 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
381 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", | |
382 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
383 | ); | |
384 | ||
385 | /* detach any '&' anon children in the pad; if afterwards they | |
386 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
387 | * bypassing us. */ | |
388 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
389 | * children, or integrate this loop with general cleanup */ | |
390 | ||
391 | if (PL_phase != PERL_PHASE_DESTRUCT) { /* don't bother during global destruction */ | |
392 | CV * const outercv = CvOUTSIDE(cv); | |
393 | const U32 seq = CvOUTSIDE_SEQ(cv); | |
86d2498c | 394 | PAD * const comppad_name = PadlistARRAY(padlist)[0]; |
c2736fce | 395 | SV ** const namepad = AvARRAY(comppad_name); |
86d2498c | 396 | PAD * const comppad = PadlistARRAY(padlist)[1]; |
c2736fce NC |
397 | SV ** const curpad = AvARRAY(comppad); |
398 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { | |
399 | SV * const namesv = namepad[ix]; | |
400 | if (namesv && namesv != &PL_sv_undef | |
401 | && *SvPVX_const(namesv) == '&') | |
402 | { | |
403 | CV * const innercv = MUTABLE_CV(curpad[ix]); | |
404 | U32 inner_rc = SvREFCNT(innercv); | |
405 | assert(inner_rc); | |
e09ac076 | 406 | assert(SvTYPE(innercv) != SVt_PVFM); |
c2736fce NC |
407 | |
408 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
409 | curpad[ix] = NULL; | |
fc2b2dca | 410 | SvREFCNT_dec_NN(innercv); |
c2736fce NC |
411 | inner_rc--; |
412 | } | |
413 | ||
414 | /* in use, not just a prototype */ | |
415 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
416 | assert(CvWEAKOUTSIDE(innercv)); | |
417 | /* don't relink to grandfather if he's being freed */ | |
418 | if (outercv && SvREFCNT(outercv)) { | |
419 | CvWEAKOUTSIDE_off(innercv); | |
420 | CvOUTSIDE(innercv) = outercv; | |
421 | CvOUTSIDE_SEQ(innercv) = seq; | |
422 | SvREFCNT_inc_simple_void_NN(outercv); | |
423 | } | |
424 | else { | |
425 | CvOUTSIDE(innercv) = NULL; | |
426 | } | |
427 | } | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
86d2498c | 432 | ix = PadlistMAX(padlist); |
aa2f79cf | 433 | while (ix > 0) { |
86d2498c | 434 | PAD * const sv = PadlistARRAY(padlist)[ix--]; |
c2736fce | 435 | if (sv) { |
7261499d | 436 | if (sv == PL_comppad) { |
c2736fce NC |
437 | PL_comppad = NULL; |
438 | PL_curpad = NULL; | |
439 | } | |
fc2b2dca | 440 | SvREFCNT_dec_NN(sv); |
c2736fce | 441 | } |
aa2f79cf NC |
442 | } |
443 | { | |
86d2498c | 444 | PAD * const sv = PadlistARRAY(padlist)[0]; |
9ef8d569 | 445 | if (sv == PL_comppad_name && SvREFCNT(sv) == 1) |
aa2f79cf | 446 | PL_comppad_name = NULL; |
c2736fce NC |
447 | SvREFCNT_dec(sv); |
448 | } | |
86d2498c | 449 | if (PadlistARRAY(padlist)) Safefree(PadlistARRAY(padlist)); |
7261499d | 450 | Safefree(padlist); |
c2736fce NC |
451 | CvPADLIST(cv) = NULL; |
452 | } | |
453 | ||
c4528262 NC |
454 | |
455 | /* remove CvOUTSIDE unless this is an undef rather than a free */ | |
456 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { | |
457 | if (!CvWEAKOUTSIDE(cv)) | |
458 | SvREFCNT_dec(CvOUTSIDE(cv)); | |
459 | CvOUTSIDE(cv) = NULL; | |
460 | } | |
461 | if (CvCONST(cv)) { | |
462 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); | |
463 | CvCONST_off(cv); | |
464 | } | |
465 | if (CvISXSUB(cv) && CvXSUB(cv)) { | |
466 | CvXSUB(cv) = NULL; | |
467 | } | |
468 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the | |
2c374370 FC |
469 | * ref status of CvOUTSIDE and CvGV, and ANON, which pp_entersub uses |
470 | * to choose an error message */ | |
471 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC|CVf_ANON); | |
c4528262 | 472 | } |
dd2155a4 | 473 | |
50dc2bd3 FC |
474 | /* |
475 | =for apidoc cv_forget_slab | |
476 | ||
477 | When a CV has a reference count on its slab (CvSLABBED), it is responsible | |
478 | for making sure it is freed. (Hence, no two CVs should ever have a | |
479 | reference count on the same slab.) The CV only needs to reference the slab | |
480 | during compilation. Once it is compiled and CvROOT attached, it has | |
481 | finished its job, so it can forget the slab. | |
482 | ||
483 | =cut | |
484 | */ | |
485 | ||
8be227ab FC |
486 | void |
487 | Perl_cv_forget_slab(pTHX_ CV *cv) | |
488 | { | |
489 | const bool slabbed = !!CvSLABBED(cv); | |
3107b51f | 490 | OPSLAB *slab = NULL; |
8be227ab FC |
491 | |
492 | PERL_ARGS_ASSERT_CV_FORGET_SLAB; | |
493 | ||
494 | if (!slabbed) return; | |
495 | ||
496 | CvSLABBED_off(cv); | |
497 | ||
3107b51f FC |
498 | if (CvROOT(cv)) slab = OpSLAB(CvROOT(cv)); |
499 | else if (CvSTART(cv)) slab = (OPSLAB *)CvSTART(cv); | |
7aef8e5b | 500 | #ifdef DEBUGGING |
eb212a1c | 501 | else if (slabbed) Perl_warn(aTHX_ "Slab leaked from cv %p", (void*)cv); |
7aef8e5b | 502 | #endif |
3107b51f | 503 | |
3107b51f | 504 | if (slab) { |
f3e29105 NC |
505 | #ifdef PERL_DEBUG_READONLY_OPS |
506 | const size_t refcnt = slab->opslab_refcnt; | |
507 | #endif | |
3107b51f | 508 | OpslabREFCNT_dec(slab); |
f3e29105 | 509 | #ifdef PERL_DEBUG_READONLY_OPS |
3107b51f | 510 | if (refcnt > 1) Slab_to_ro(slab); |
8be227ab | 511 | #endif |
f3e29105 | 512 | } |
7aef8e5b | 513 | } |
8be227ab | 514 | |
cc76b5cc Z |
515 | /* |
516 | =for apidoc m|PADOFFSET|pad_alloc_name|SV *namesv|U32 flags|HV *typestash|HV *ourstash | |
517 | ||
1a115e49 FC |
518 | Allocates a place in the currently-compiling |
519 | pad (via L<perlapi/pad_alloc>) and | |
cc76b5cc Z |
520 | then stores a name for that entry. I<namesv> is adopted and becomes the |
521 | name entry; it must already contain the name string and be sufficiently | |
522 | upgraded. I<typestash> and I<ourstash> and the C<padadd_STATE> flag get | |
1a115e49 FC |
523 | added to I<namesv>. None of the other |
524 | processing of L<perlapi/pad_add_name_pvn> | |
cc76b5cc Z |
525 | is done. Returns the offset of the allocated pad slot. |
526 | ||
527 | =cut | |
528 | */ | |
529 | ||
3291825f | 530 | static PADOFFSET |
cc76b5cc | 531 | S_pad_alloc_name(pTHX_ SV *namesv, U32 flags, HV *typestash, HV *ourstash) |
3291825f | 532 | { |
3291825f NC |
533 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
534 | ||
cc76b5cc | 535 | PERL_ARGS_ASSERT_PAD_ALLOC_NAME; |
3291825f | 536 | |
cc76b5cc | 537 | ASSERT_CURPAD_ACTIVE("pad_alloc_name"); |
3291825f NC |
538 | |
539 | if (typestash) { | |
540 | assert(SvTYPE(namesv) == SVt_PVMG); | |
541 | SvPAD_TYPED_on(namesv); | |
542 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); | |
543 | } | |
544 | if (ourstash) { | |
545 | SvPAD_OUR_on(namesv); | |
546 | SvOURSTASH_set(namesv, ourstash); | |
547 | SvREFCNT_inc_simple_void_NN(ourstash); | |
548 | } | |
59cfed7d | 549 | else if (flags & padadd_STATE) { |
3291825f NC |
550 | SvPAD_STATE_on(namesv); |
551 | } | |
552 | ||
553 | av_store(PL_comppad_name, offset, namesv); | |
7db6405c | 554 | PadnamelistMAXNAMED(PL_comppad_name) = offset; |
3291825f NC |
555 | return offset; |
556 | } | |
557 | ||
dd2155a4 | 558 | /* |
cc76b5cc | 559 | =for apidoc Am|PADOFFSET|pad_add_name_pvn|const char *namepv|STRLEN namelen|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 560 | |
cc76b5cc Z |
561 | Allocates a place in the currently-compiling pad for a named lexical |
562 | variable. Stores the name and other metadata in the name part of the | |
563 | pad, and makes preparations to manage the variable's lexical scoping. | |
564 | Returns the offset of the allocated pad slot. | |
dd2155a4 | 565 | |
cc76b5cc Z |
566 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. |
567 | If I<typestash> is non-null, the name is for a typed lexical, and this | |
568 | identifies the type. If I<ourstash> is non-null, it's a lexical reference | |
569 | to a package variable, and this identifies the package. The following | |
570 | flags can be OR'ed together: | |
571 | ||
572 | padadd_OUR redundantly specifies if it's a package var | |
573 | padadd_STATE variable will retain value persistently | |
574 | padadd_NO_DUP_CHECK skip check for lexical shadowing | |
dd2155a4 DM |
575 | |
576 | =cut | |
577 | */ | |
578 | ||
dd2155a4 | 579 | PADOFFSET |
cc76b5cc Z |
580 | Perl_pad_add_name_pvn(pTHX_ const char *namepv, STRLEN namelen, |
581 | U32 flags, HV *typestash, HV *ourstash) | |
dd2155a4 | 582 | { |
3291825f | 583 | PADOFFSET offset; |
cca43f78 | 584 | SV *namesv; |
e8b34487 | 585 | bool is_utf8; |
dd2155a4 | 586 | |
cc76b5cc | 587 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PVN; |
7918f24d | 588 | |
2435e5d3 | 589 | if (flags & ~(padadd_OUR|padadd_STATE|padadd_NO_DUP_CHECK|padadd_UTF8_NAME)) |
cc76b5cc | 590 | Perl_croak(aTHX_ "panic: pad_add_name_pvn illegal flag bits 0x%" UVxf, |
cca43f78 NC |
591 | (UV)flags); |
592 | ||
593 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
e8b34487 BF |
594 | |
595 | if ((is_utf8 = ((flags & padadd_UTF8_NAME) != 0))) { | |
596 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
597 | } | |
598 | ||
0727928e BF |
599 | sv_setpvn(namesv, namepv, namelen); |
600 | ||
e8b34487 BF |
601 | if (is_utf8) { |
602 | flags |= padadd_UTF8_NAME; | |
603 | SvUTF8_on(namesv); | |
604 | } | |
605 | else | |
606 | flags &= ~padadd_UTF8_NAME; | |
dd2155a4 | 607 | |
59cfed7d | 608 | if ((flags & padadd_NO_DUP_CHECK) == 0) { |
c2b36a6d FC |
609 | ENTER; |
610 | SAVEFREESV(namesv); /* in case of fatal warnings */ | |
2d12d04f | 611 | /* check for duplicate declaration */ |
59cfed7d | 612 | pad_check_dup(namesv, flags & padadd_OUR, ourstash); |
c2b36a6d FC |
613 | SvREFCNT_inc_simple_void_NN(namesv); |
614 | LEAVE; | |
2d12d04f NC |
615 | } |
616 | ||
2435e5d3 | 617 | offset = pad_alloc_name(namesv, flags & ~padadd_UTF8_NAME, typestash, ourstash); |
3291825f NC |
618 | |
619 | /* not yet introduced */ | |
2df5bdd7 DM |
620 | COP_SEQ_RANGE_LOW_set(namesv, PERL_PADSEQ_INTRO); |
621 | COP_SEQ_RANGE_HIGH_set(namesv, 0); | |
3291825f NC |
622 | |
623 | if (!PL_min_intro_pending) | |
624 | PL_min_intro_pending = offset; | |
625 | PL_max_intro_pending = offset; | |
626 | /* if it's not a simple scalar, replace with an AV or HV */ | |
c1bf42f3 NC |
627 | assert(SvTYPE(PL_curpad[offset]) == SVt_NULL); |
628 | assert(SvREFCNT(PL_curpad[offset]) == 1); | |
cc76b5cc | 629 | if (namelen != 0 && *namepv == '@') |
c1bf42f3 | 630 | sv_upgrade(PL_curpad[offset], SVt_PVAV); |
cc76b5cc | 631 | else if (namelen != 0 && *namepv == '%') |
c1bf42f3 | 632 | sv_upgrade(PL_curpad[offset], SVt_PVHV); |
6d5c2147 FC |
633 | else if (namelen != 0 && *namepv == '&') |
634 | sv_upgrade(PL_curpad[offset], SVt_PVCV); | |
c1bf42f3 | 635 | assert(SvPADMY(PL_curpad[offset])); |
3291825f NC |
636 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
637 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
cc76b5cc Z |
638 | (long)offset, SvPVX(namesv), |
639 | PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
640 | |
641 | return offset; | |
642 | } | |
643 | ||
cc76b5cc Z |
644 | /* |
645 | =for apidoc Am|PADOFFSET|pad_add_name_pv|const char *name|U32 flags|HV *typestash|HV *ourstash | |
dd2155a4 | 646 | |
cc76b5cc Z |
647 | Exactly like L</pad_add_name_pvn>, but takes a nul-terminated string |
648 | instead of a string/length pair. | |
dd2155a4 | 649 | |
cc76b5cc Z |
650 | =cut |
651 | */ | |
652 | ||
653 | PADOFFSET | |
654 | Perl_pad_add_name_pv(pTHX_ const char *name, | |
0e1b3a4b | 655 | const U32 flags, HV *typestash, HV *ourstash) |
cc76b5cc Z |
656 | { |
657 | PERL_ARGS_ASSERT_PAD_ADD_NAME_PV; | |
658 | return pad_add_name_pvn(name, strlen(name), flags, typestash, ourstash); | |
659 | } | |
dd2155a4 DM |
660 | |
661 | /* | |
cc76b5cc | 662 | =for apidoc Am|PADOFFSET|pad_add_name_sv|SV *name|U32 flags|HV *typestash|HV *ourstash |
dd2155a4 | 663 | |
cc76b5cc Z |
664 | Exactly like L</pad_add_name_pvn>, but takes the name string in the form |
665 | of an SV instead of a string/length pair. | |
666 | ||
667 | =cut | |
668 | */ | |
669 | ||
670 | PADOFFSET | |
671 | Perl_pad_add_name_sv(pTHX_ SV *name, U32 flags, HV *typestash, HV *ourstash) | |
672 | { | |
673 | char *namepv; | |
674 | STRLEN namelen; | |
675 | PERL_ARGS_ASSERT_PAD_ADD_NAME_SV; | |
676 | namepv = SvPV(name, namelen); | |
e8b34487 BF |
677 | if (SvUTF8(name)) |
678 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
679 | return pad_add_name_pvn(namepv, namelen, flags, typestash, ourstash); |
680 | } | |
681 | ||
682 | /* | |
683 | =for apidoc Amx|PADOFFSET|pad_alloc|I32 optype|U32 tmptype | |
684 | ||
685 | Allocates a place in the currently-compiling pad, | |
686 | returning the offset of the allocated pad slot. | |
687 | No name is initially attached to the pad slot. | |
688 | I<tmptype> is a set of flags indicating the kind of pad entry required, | |
689 | which will be set in the value SV for the allocated pad entry: | |
690 | ||
691 | SVs_PADMY named lexical variable ("my", "our", "state") | |
692 | SVs_PADTMP unnamed temporary store | |
325e1816 FC |
693 | SVf_READONLY constant shared between recursion levels |
694 | ||
695 | C<SVf_READONLY> has been supported here only since perl 5.20. To work with | |
c370bd2e FC |
696 | earlier versions as well, use C<SVf_READONLY|SVs_PADTMP>. C<SVf_READONLY> |
697 | does not cause the SV in the pad slot to be marked read-only, but simply | |
698 | tells C<pad_alloc> that it I<will> be made read-only (by the caller), or at | |
699 | least should be treated as such. | |
cc76b5cc Z |
700 | |
701 | I<optype> should be an opcode indicating the type of operation that the | |
702 | pad entry is to support. This doesn't affect operational semantics, | |
703 | but is used for debugging. | |
dd2155a4 DM |
704 | |
705 | =cut | |
706 | */ | |
707 | ||
708 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
709 | * or at least rationalise ??? */ | |
dd2155a4 DM |
710 | |
711 | PADOFFSET | |
712 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
713 | { | |
714 | SV *sv; | |
715 | I32 retval; | |
716 | ||
6136c704 | 717 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
718 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
719 | ||
dd2155a4 | 720 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
721 | Perl_croak(aTHX_ "panic: pad_alloc, %p!=%p", |
722 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
723 | if (PL_pad_reset_pending) |
724 | pad_reset(); | |
725 | if (tmptype & SVs_PADMY) { | |
cc76b5cc | 726 | /* For a my, simply push a null SV onto the end of PL_comppad. */ |
235cc2e3 | 727 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
728 | retval = AvFILLp(PL_comppad); |
729 | } | |
730 | else { | |
cc76b5cc Z |
731 | /* For a tmp, scan the pad from PL_padix upwards |
732 | * for a slot which has no name and no active value. | |
733 | */ | |
551405c4 | 734 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 735 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
736 | for (;;) { |
737 | /* | |
833bf1cd FC |
738 | * Entries that close over unavailable variables |
739 | * in outer subs contain values not marked PADMY. | |
740 | * Thus we must skip, not just pad values that are | |
dd2155a4 DM |
741 | * marked as current pad values, but also those with names. |
742 | */ | |
dd2155a4 DM |
743 | if (++PL_padix <= names_fill && |
744 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
745 | continue; | |
746 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
747 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
a888bde5 | 748 | !IS_PADGV(sv)) |
dd2155a4 DM |
749 | break; |
750 | } | |
325e1816 FC |
751 | if (tmptype & SVf_READONLY) { |
752 | av_store(PL_comppad_name, PL_padix, &PL_sv_no); | |
753 | tmptype &= ~SVf_READONLY; | |
754 | tmptype |= SVs_PADTMP; | |
755 | } | |
dd2155a4 DM |
756 | retval = PL_padix; |
757 | } | |
758 | SvFLAGS(sv) |= tmptype; | |
759 | PL_curpad = AvARRAY(PL_comppad); | |
760 | ||
761 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
762 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
763 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
764 | PL_op_name[optype])); | |
fd0854ff DM |
765 | #ifdef DEBUG_LEAKING_SCALARS |
766 | sv->sv_debug_optype = optype; | |
767 | sv->sv_debug_inpad = 1; | |
fd0854ff | 768 | #endif |
a212c8b5 | 769 | return (PADOFFSET)retval; |
dd2155a4 DM |
770 | } |
771 | ||
772 | /* | |
cc76b5cc | 773 | =for apidoc Am|PADOFFSET|pad_add_anon|CV *func|I32 optype |
dd2155a4 | 774 | |
cc76b5cc Z |
775 | Allocates a place in the currently-compiling pad (via L</pad_alloc>) |
776 | for an anonymous function that is lexically scoped inside the | |
777 | currently-compiling function. | |
778 | The function I<func> is linked into the pad, and its C<CvOUTSIDE> link | |
779 | to the outer scope is weakened to avoid a reference loop. | |
780 | ||
84eea980 FC |
781 | One reference count is stolen, so you may need to do C<SvREFCNT_inc(func)>. |
782 | ||
cc76b5cc Z |
783 | I<optype> should be an opcode indicating the type of operation that the |
784 | pad entry is to support. This doesn't affect operational semantics, | |
785 | but is used for debugging. | |
dd2155a4 DM |
786 | |
787 | =cut | |
788 | */ | |
789 | ||
790 | PADOFFSET | |
cc76b5cc | 791 | Perl_pad_add_anon(pTHX_ CV* func, I32 optype) |
dd2155a4 DM |
792 | { |
793 | PADOFFSET ix; | |
b9f83d2f | 794 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
795 | |
796 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
797 | ||
1dba731d | 798 | pad_peg("add_anon"); |
76f68e9b | 799 | sv_setpvs(name, "&"); |
0d311cdb DM |
800 | /* These two aren't used; just make sure they're not equal to |
801 | * PERL_PADSEQ_INTRO */ | |
802 | COP_SEQ_RANGE_LOW_set(name, 0); | |
803 | COP_SEQ_RANGE_HIGH_set(name, 0); | |
cc76b5cc | 804 | ix = pad_alloc(optype, SVs_PADMY); |
dd2155a4 | 805 | av_store(PL_comppad_name, ix, name); |
f3548bdc | 806 | /* XXX DAPM use PL_curpad[] ? */ |
e09ac076 FC |
807 | if (SvTYPE(func) == SVt_PVCV || !CvOUTSIDE(func)) |
808 | av_store(PL_comppad, ix, (SV*)func); | |
809 | else { | |
7c93c29b | 810 | SV *rv = newRV_noinc((SV *)func); |
e09ac076 FC |
811 | sv_rvweaken(rv); |
812 | assert (SvTYPE(func) == SVt_PVFM); | |
813 | av_store(PL_comppad, ix, rv); | |
814 | } | |
cc76b5cc | 815 | SvPADMY_on((SV*)func); |
7dafbf52 DM |
816 | |
817 | /* to avoid ref loops, we never have parent + child referencing each | |
818 | * other simultaneously */ | |
e09ac076 | 819 | if (CvOUTSIDE(func) && SvTYPE(func) == SVt_PVCV) { |
cc76b5cc Z |
820 | assert(!CvWEAKOUTSIDE(func)); |
821 | CvWEAKOUTSIDE_on(func); | |
fc2b2dca | 822 | SvREFCNT_dec_NN(CvOUTSIDE(func)); |
7dafbf52 | 823 | } |
dd2155a4 DM |
824 | return ix; |
825 | } | |
826 | ||
dd2155a4 | 827 | /* |
13087dd8 | 828 | =for apidoc pad_check_dup |
dd2155a4 DM |
829 | |
830 | Check for duplicate declarations: report any of: | |
13087dd8 | 831 | |
dd2155a4 | 832 | * a my in the current scope with the same name; |
13087dd8 FC |
833 | * an our (anywhere in the pad) with the same name and the |
834 | same stash as C<ourstash> | |
835 | ||
836 | C<is_our> indicates that the name to check is an 'our' declaration. | |
dd2155a4 DM |
837 | |
838 | =cut | |
839 | */ | |
840 | ||
20381b50 | 841 | STATIC void |
cc76b5cc | 842 | S_pad_check_dup(pTHX_ SV *name, U32 flags, const HV *ourstash) |
dd2155a4 | 843 | { |
53c1dcc0 | 844 | SV **svp; |
dd2155a4 | 845 | PADOFFSET top, off; |
59cfed7d | 846 | const U32 is_our = flags & padadd_OUR; |
dd2155a4 | 847 | |
7918f24d NC |
848 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
849 | ||
f3548bdc | 850 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 | 851 | |
59cfed7d | 852 | assert((flags & ~padadd_OUR) == 0); |
35f82371 | 853 | |
041457d9 | 854 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
855 | return; /* nothing to check */ |
856 | ||
857 | svp = AvARRAY(PL_comppad_name); | |
858 | top = AvFILLp(PL_comppad_name); | |
859 | /* check the current scope */ | |
860 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
861 | * type ? */ | |
862 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
863 | SV * const sv = svp[off]; |
864 | if (sv | |
325e1816 | 865 | && PadnameLEN(sv) |
ee6cee0c | 866 | && !SvFAKE(sv) |
0d311cdb DM |
867 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
868 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
2d12d04f | 869 | && sv_eq(name, sv)) |
dd2155a4 | 870 | { |
00b1698f | 871 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 872 | break; /* "our" masking "our" */ |
4eb94d7c | 873 | /* diag_listed_as: "%s" variable %s masks earlier declaration in same %s */ |
dd2155a4 | 874 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
4eb94d7c | 875 | "\"%s\" %s %"SVf" masks earlier declaration in same %s", |
12bd6ede | 876 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
4eb94d7c | 877 | *SvPVX(sv) == '&' ? "subroutine" : "variable", |
c1f6cd39 | 878 | SVfARG(sv), |
2df5bdd7 DM |
879 | (COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO |
880 | ? "scope" : "statement")); | |
dd2155a4 DM |
881 | --off; |
882 | break; | |
883 | } | |
884 | } | |
885 | /* check the rest of the pad */ | |
886 | if (is_our) { | |
61c5492a | 887 | while (off > 0) { |
53c1dcc0 AL |
888 | SV * const sv = svp[off]; |
889 | if (sv | |
325e1816 | 890 | && PadnameLEN(sv) |
ee6cee0c | 891 | && !SvFAKE(sv) |
0d311cdb DM |
892 | && ( COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO |
893 | || COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) | |
73d95100 | 894 | && SvOURSTASH(sv) == ourstash |
2d12d04f | 895 | && sv_eq(name, sv)) |
dd2155a4 DM |
896 | { |
897 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
c1f6cd39 | 898 | "\"our\" variable %"SVf" redeclared", SVfARG(sv)); |
624f69f5 | 899 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
900 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
901 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
902 | break; |
903 | } | |
61c5492a NC |
904 | --off; |
905 | } | |
dd2155a4 DM |
906 | } |
907 | } | |
908 | ||
909 | ||
dd2155a4 | 910 | /* |
cc76b5cc | 911 | =for apidoc Am|PADOFFSET|pad_findmy_pvn|const char *namepv|STRLEN namelen|U32 flags |
dd2155a4 | 912 | |
cc76b5cc Z |
913 | Given the name of a lexical variable, find its position in the |
914 | currently-compiling pad. | |
915 | I<namepv>/I<namelen> specify the variable's name, including leading sigil. | |
916 | I<flags> is reserved and must be zero. | |
917 | If it is not in the current pad but appears in the pad of any lexically | |
918 | enclosing scope, then a pseudo-entry for it is added in the current pad. | |
919 | Returns the offset in the current pad, | |
920 | or C<NOT_IN_PAD> if no such lexical is in scope. | |
dd2155a4 DM |
921 | |
922 | =cut | |
923 | */ | |
924 | ||
925 | PADOFFSET | |
cc76b5cc | 926 | Perl_pad_findmy_pvn(pTHX_ const char *namepv, STRLEN namelen, U32 flags) |
dd2155a4 | 927 | { |
b5c19bd7 DM |
928 | SV *out_sv; |
929 | int out_flags; | |
929a0744 | 930 | I32 offset; |
e1ec3a88 | 931 | const AV *nameav; |
929a0744 | 932 | SV **name_svp; |
dd2155a4 | 933 | |
cc76b5cc | 934 | PERL_ARGS_ASSERT_PAD_FINDMY_PVN; |
7918f24d | 935 | |
cc76b5cc | 936 | pad_peg("pad_findmy_pvn"); |
f8f98e0a | 937 | |
2435e5d3 | 938 | if (flags & ~padadd_UTF8_NAME) |
cc76b5cc | 939 | Perl_croak(aTHX_ "panic: pad_findmy_pvn illegal flag bits 0x%" UVxf, |
f8f98e0a NC |
940 | (UV)flags); |
941 | ||
e8b34487 BF |
942 | if (flags & padadd_UTF8_NAME) { |
943 | bool is_utf8 = TRUE; | |
944 | namepv = (const char*)bytes_from_utf8((U8*)namepv, &namelen, &is_utf8); | |
945 | ||
946 | if (is_utf8) | |
947 | flags |= padadd_UTF8_NAME; | |
948 | else | |
949 | flags &= ~padadd_UTF8_NAME; | |
950 | } | |
951 | ||
fbb889c8 BF |
952 | offset = pad_findlex(namepv, namelen, flags, |
953 | PL_compcv, PL_cop_seqmax, 1, NULL, &out_sv, &out_flags); | |
9f7d9405 | 954 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
955 | return offset; |
956 | ||
957 | /* look for an our that's being introduced; this allows | |
958 | * our $foo = 0 unless defined $foo; | |
959 | * to not give a warning. (Yes, this is a hack) */ | |
960 | ||
86d2498c | 961 | nameav = PadlistARRAY(CvPADLIST(PL_compcv))[0]; |
929a0744 DM |
962 | name_svp = AvARRAY(nameav); |
963 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 964 | const SV * const namesv = name_svp[offset]; |
325e1816 | 965 | if (namesv && PadnameLEN(namesv) == namelen |
929a0744 | 966 | && !SvFAKE(namesv) |
00b1698f | 967 | && (SvPAD_OUR(namesv)) |
e8b34487 BF |
968 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
969 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0 ) | |
2df5bdd7 | 970 | && COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO |
929a0744 DM |
971 | ) |
972 | return offset; | |
973 | } | |
974 | return NOT_IN_PAD; | |
dd2155a4 DM |
975 | } |
976 | ||
e1f795dc | 977 | /* |
cc76b5cc Z |
978 | =for apidoc Am|PADOFFSET|pad_findmy_pv|const char *name|U32 flags |
979 | ||
980 | Exactly like L</pad_findmy_pvn>, but takes a nul-terminated string | |
981 | instead of a string/length pair. | |
982 | ||
983 | =cut | |
984 | */ | |
985 | ||
986 | PADOFFSET | |
987 | Perl_pad_findmy_pv(pTHX_ const char *name, U32 flags) | |
988 | { | |
989 | PERL_ARGS_ASSERT_PAD_FINDMY_PV; | |
990 | return pad_findmy_pvn(name, strlen(name), flags); | |
991 | } | |
992 | ||
993 | /* | |
994 | =for apidoc Am|PADOFFSET|pad_findmy_sv|SV *name|U32 flags | |
995 | ||
996 | Exactly like L</pad_findmy_pvn>, but takes the name string in the form | |
997 | of an SV instead of a string/length pair. | |
998 | ||
999 | =cut | |
1000 | */ | |
1001 | ||
1002 | PADOFFSET | |
1003 | Perl_pad_findmy_sv(pTHX_ SV *name, U32 flags) | |
1004 | { | |
1005 | char *namepv; | |
1006 | STRLEN namelen; | |
1007 | PERL_ARGS_ASSERT_PAD_FINDMY_SV; | |
1008 | namepv = SvPV(name, namelen); | |
2435e5d3 BF |
1009 | if (SvUTF8(name)) |
1010 | flags |= padadd_UTF8_NAME; | |
cc76b5cc Z |
1011 | return pad_findmy_pvn(namepv, namelen, flags); |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | =for apidoc Amp|PADOFFSET|find_rundefsvoffset | |
1016 | ||
1017 | Find the position of the lexical C<$_> in the pad of the | |
1018 | currently-executing function. Returns the offset in the current pad, | |
1019 | or C<NOT_IN_PAD> if there is no lexical C<$_> in scope (in which case | |
1020 | the global one should be used instead). | |
1021 | L</find_rundefsv> is likely to be more convenient. | |
1022 | ||
1023 | =cut | |
1024 | */ | |
e1f795dc RGS |
1025 | |
1026 | PADOFFSET | |
29289021 | 1027 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc RGS |
1028 | { |
1029 | SV *out_sv; | |
1030 | int out_flags; | |
fbb889c8 | 1031 | return pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e | 1032 | NULL, &out_sv, &out_flags); |
e1f795dc | 1033 | } |
dd2155a4 | 1034 | |
dd2155a4 | 1035 | /* |
cc76b5cc Z |
1036 | =for apidoc Am|SV *|find_rundefsv |
1037 | ||
1038 | Find and return the variable that is named C<$_> in the lexical scope | |
1039 | of the currently-executing function. This may be a lexical C<$_>, | |
1040 | or will otherwise be the global one. | |
1041 | ||
1042 | =cut | |
1043 | */ | |
789bd863 VP |
1044 | |
1045 | SV * | |
1046 | Perl_find_rundefsv(pTHX) | |
1047 | { | |
1048 | SV *namesv; | |
1049 | int flags; | |
1050 | PADOFFSET po; | |
1051 | ||
fbb889c8 | 1052 | po = pad_findlex("$_", 2, 0, find_runcv(NULL), PL_curcop->cop_seq, 1, |
789bd863 VP |
1053 | NULL, &namesv, &flags); |
1054 | ||
1979170b | 1055 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) |
789bd863 VP |
1056 | return DEFSV; |
1057 | ||
1058 | return PAD_SVl(po); | |
1059 | } | |
1060 | ||
c086f97a FC |
1061 | SV * |
1062 | Perl_find_rundefsv2(pTHX_ CV *cv, U32 seq) | |
1063 | { | |
1064 | SV *namesv; | |
1065 | int flags; | |
1066 | PADOFFSET po; | |
1067 | ||
1068 | PERL_ARGS_ASSERT_FIND_RUNDEFSV2; | |
1069 | ||
1070 | po = pad_findlex("$_", 2, 0, cv, seq, 1, | |
1071 | NULL, &namesv, &flags); | |
1072 | ||
1073 | if (po == NOT_IN_PAD || SvPAD_OUR(namesv)) | |
1074 | return DEFSV; | |
1075 | ||
86d2498c | 1076 | return AvARRAY(PadlistARRAY(CvPADLIST(cv))[CvDEPTH(cv)])[po]; |
c086f97a FC |
1077 | } |
1078 | ||
789bd863 | 1079 | /* |
fbb889c8 | 1080 | =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 | 1081 | |
72d33970 | 1082 | Find a named lexical anywhere in a chain of nested pads. Add fake entries |
b5c19bd7 DM |
1083 | in the inner pads if it's found in an outer one. |
1084 | ||
1085 | Returns the offset in the bottom pad of the lex or the fake lex. | |
1086 | cv is the CV in which to start the search, and seq is the current cop_seq | |
72d33970 | 1087 | to match against. If warn is true, print appropriate warnings. The out_* |
b5c19bd7 | 1088 | vars return values, and so are pointers to where the returned values |
72d33970 | 1089 | should be stored. out_capture, if non-null, requests that the innermost |
b5c19bd7 DM |
1090 | instance of the lexical is captured; out_name_sv is set to the innermost |
1091 | matched namesv or fake namesv; out_flags returns the flags normally | |
1092 | associated with the IVX field of a fake namesv. | |
1093 | ||
1094 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
72d33970 FC |
1095 | then comes back down, adding fake entries |
1096 | as it goes. It has to be this way | |
3441fb63 | 1097 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 1098 | the parent pad. |
dd2155a4 DM |
1099 | |
1100 | =cut | |
1101 | */ | |
1102 | ||
b5c19bd7 DM |
1103 | /* the CV has finished being compiled. This is not a sufficient test for |
1104 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
1105 | #define CvCOMPILED(cv) CvROOT(cv) | |
1106 | ||
71f882da | 1107 | /* the CV does late binding of its lexicals */ |
e07561e6 | 1108 | #define CvLATE(cv) (CvANON(cv) || CvCLONE(cv) || SvTYPE(cv) == SVt_PVFM) |
71f882da | 1109 | |
445f13ff FC |
1110 | static void |
1111 | S_unavailable(pTHX_ SV *namesv) | |
1112 | { | |
1113 | /* diag_listed_as: Variable "%s" is not available */ | |
1114 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), | |
1115 | "%se \"%"SVf"\" is not available", | |
1116 | *SvPVX_const(namesv) == '&' | |
1117 | ? "Subroutin" | |
1118 | : "Variabl", | |
c1f6cd39 | 1119 | SVfARG(namesv)); |
445f13ff | 1120 | } |
b5c19bd7 | 1121 | |
dd2155a4 | 1122 | STATIC PADOFFSET |
fbb889c8 | 1123 | S_pad_findlex(pTHX_ const char *namepv, STRLEN namelen, U32 flags, const CV* cv, U32 seq, |
cc76b5cc | 1124 | int warn, SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 1125 | { |
b5c19bd7 DM |
1126 | I32 offset, new_offset; |
1127 | SV *new_capture; | |
1128 | SV **new_capturep; | |
b70d5558 | 1129 | const PADLIST * const padlist = CvPADLIST(cv); |
7ef30830 | 1130 | const bool staleok = !!(flags & padadd_STALEOK); |
dd2155a4 | 1131 | |
7918f24d NC |
1132 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
1133 | ||
7ef30830 | 1134 | if (flags & ~(padadd_UTF8_NAME|padadd_STALEOK)) |
2435e5d3 BF |
1135 | Perl_croak(aTHX_ "panic: pad_findlex illegal flag bits 0x%" UVxf, |
1136 | (UV)flags); | |
7ef30830 | 1137 | flags &= ~ padadd_STALEOK; /* one-shot flag */ |
2435e5d3 | 1138 | |
b5c19bd7 | 1139 | *out_flags = 0; |
a3985cdc | 1140 | |
b5c19bd7 | 1141 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
cc76b5cc | 1142 | "Pad findlex cv=0x%"UVxf" searching \"%.*s\" seq=%d%s\n", |
4c760560 | 1143 | PTR2UV(cv), (int)namelen, namepv, (int)seq, |
cc76b5cc | 1144 | out_capture ? " capturing" : "" )); |
dd2155a4 | 1145 | |
b5c19bd7 | 1146 | /* first, search this pad */ |
dd2155a4 | 1147 | |
b5c19bd7 DM |
1148 | if (padlist) { /* not an undef CV */ |
1149 | I32 fake_offset = 0; | |
86d2498c | 1150 | const AV * const nameav = PadlistARRAY(padlist)[0]; |
551405c4 | 1151 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 1152 | |
7db6405c | 1153 | for (offset = PadnamelistMAXNAMED(nameav); offset > 0; offset--) { |
551405c4 | 1154 | const SV * const namesv = name_svp[offset]; |
325e1816 | 1155 | if (namesv && PadnameLEN(namesv) == namelen |
e8b34487 BF |
1156 | && sv_eq_pvn_flags(aTHX_ namesv, namepv, namelen, |
1157 | flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)) | |
b5c19bd7 | 1158 | { |
6012dc80 | 1159 | if (SvFAKE(namesv)) { |
b5c19bd7 | 1160 | fake_offset = offset; /* in case we don't find a real one */ |
6012dc80 DM |
1161 | continue; |
1162 | } | |
1163 | /* is seq within the range _LOW to _HIGH ? | |
1164 | * This is complicated by the fact that PL_cop_seqmax | |
1165 | * may have wrapped around at some point */ | |
1166 | if (COP_SEQ_RANGE_LOW(namesv) == PERL_PADSEQ_INTRO) | |
1167 | continue; /* not yet introduced */ | |
1168 | ||
1169 | if (COP_SEQ_RANGE_HIGH(namesv) == PERL_PADSEQ_INTRO) { | |
1170 | /* in compiling scope */ | |
1171 | if ( | |
1172 | (seq > COP_SEQ_RANGE_LOW(namesv)) | |
1173 | ? (seq - COP_SEQ_RANGE_LOW(namesv) < (U32_MAX >> 1)) | |
1174 | : (COP_SEQ_RANGE_LOW(namesv) - seq > (U32_MAX >> 1)) | |
1175 | ) | |
1176 | break; | |
1177 | } | |
1178 | else if ( | |
1179 | (COP_SEQ_RANGE_LOW(namesv) > COP_SEQ_RANGE_HIGH(namesv)) | |
1180 | ? | |
1181 | ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1182 | || seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1183 | ||
1184 | : ( seq > COP_SEQ_RANGE_LOW(namesv) | |
1185 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) | |
1186 | ) | |
1187 | break; | |
ee6cee0c DM |
1188 | } |
1189 | } | |
1190 | ||
b5c19bd7 DM |
1191 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
1192 | if (offset > 0) { /* not fake */ | |
1193 | fake_offset = 0; | |
1194 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
1195 | ||
1196 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
1197 | * instances. For now, we just test !CvUNIQUE(cv), but | |
1198 | * ideally, we should detect my's declared within loops | |
1199 | * etc - this would allow a wider range of 'not stayed | |
486ec47a | 1200 | * shared' warnings. We also treated already-compiled |
b5c19bd7 DM |
1201 | * lexes as not multi as viewed from evals. */ |
1202 | ||
1203 | *out_flags = CvANON(cv) ? | |
1204 | PAD_FAKELEX_ANON : | |
1205 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
1206 | ? PAD_FAKELEX_MULTI : 0; | |
1207 | ||
1208 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
1209 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
1210 | PTR2UV(cv), (long)offset, | |
1211 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
1212 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
1213 | } |
1214 | else { /* fake match */ | |
1215 | offset = fake_offset; | |
1216 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 1217 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 1218 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 1219 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 1220 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 1221 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
1222 | )); |
1223 | } | |
dd2155a4 | 1224 | |
b5c19bd7 | 1225 | /* return the lex? */ |
dd2155a4 | 1226 | |
b5c19bd7 | 1227 | if (out_capture) { |
dd2155a4 | 1228 | |
b5c19bd7 | 1229 | /* our ? */ |
00b1698f | 1230 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 1231 | *out_capture = NULL; |
b5c19bd7 DM |
1232 | return offset; |
1233 | } | |
ee6cee0c | 1234 | |
b5c19bd7 DM |
1235 | /* trying to capture from an anon prototype? */ |
1236 | if (CvCOMPILED(cv) | |
1237 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
1238 | : *out_flags & PAD_FAKELEX_ANON) | |
1239 | { | |
a2a5de95 | 1240 | if (warn) |
445f13ff | 1241 | S_unavailable(aTHX_ |
0727928e BF |
1242 | newSVpvn_flags(namepv, namelen, |
1243 | SVs_TEMP | | |
1244 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
1245 | ||
a0714e2c | 1246 | *out_capture = NULL; |
b5c19bd7 | 1247 | } |
ee6cee0c | 1248 | |
b5c19bd7 DM |
1249 | /* real value */ |
1250 | else { | |
1251 | int newwarn = warn; | |
1252 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 1253 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
1254 | && warn && ckWARN(WARN_CLOSURE)) { |
1255 | newwarn = 0; | |
1256 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
0727928e | 1257 | "Variable \"%"SVf"\" will not stay shared", |
c1f6cd39 | 1258 | SVfARG(newSVpvn_flags(namepv, namelen, |
0727928e | 1259 | SVs_TEMP | |
c1f6cd39 | 1260 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0)))); |
b5c19bd7 | 1261 | } |
dd2155a4 | 1262 | |
b5c19bd7 DM |
1263 | if (fake_offset && CvANON(cv) |
1264 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
1265 | { | |
1266 | SV *n; | |
1267 | /* not yet caught - look further up */ | |
1268 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1269 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
1270 | PTR2UV(cv))); | |
1271 | n = *out_name_sv; | |
fbb889c8 | 1272 | (void) pad_findlex(namepv, namelen, flags, CvOUTSIDE(cv), |
282e1742 | 1273 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 DM |
1274 | newwarn, out_capture, out_name_sv, out_flags); |
1275 | *out_name_sv = n; | |
1276 | return offset; | |
dd2155a4 | 1277 | } |
b5c19bd7 | 1278 | |
86d2498c | 1279 | *out_capture = AvARRAY(PadlistARRAY(padlist)[ |
7261499d | 1280 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; |
b5c19bd7 DM |
1281 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1282 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 1283 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 1284 | |
d1186544 | 1285 | if (SvPADSTALE(*out_capture) |
7ef30830 | 1286 | && (!CvDEPTH(cv) || !staleok) |
d1186544 DM |
1287 | && !SvPAD_STATE(name_svp[offset])) |
1288 | { | |
445f13ff | 1289 | S_unavailable(aTHX_ |
0727928e BF |
1290 | newSVpvn_flags(namepv, namelen, |
1291 | SVs_TEMP | | |
1292 | (flags & padadd_UTF8_NAME ? SVf_UTF8 : 0))); | |
a0714e2c | 1293 | *out_capture = NULL; |
dd2155a4 DM |
1294 | } |
1295 | } | |
b5c19bd7 | 1296 | if (!*out_capture) { |
cc76b5cc | 1297 | if (namelen != 0 && *namepv == '@') |
ad64d0ec | 1298 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
cc76b5cc | 1299 | else if (namelen != 0 && *namepv == '%') |
ad64d0ec | 1300 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
6d5c2147 FC |
1301 | else if (namelen != 0 && *namepv == '&') |
1302 | *out_capture = sv_2mortal(newSV_type(SVt_PVCV)); | |
b5c19bd7 DM |
1303 | else |
1304 | *out_capture = sv_newmortal(); | |
1305 | } | |
dd2155a4 | 1306 | } |
b5c19bd7 DM |
1307 | |
1308 | return offset; | |
ee6cee0c | 1309 | } |
b5c19bd7 DM |
1310 | } |
1311 | ||
1312 | /* it's not in this pad - try above */ | |
1313 | ||
1314 | if (!CvOUTSIDE(cv)) | |
1315 | return NOT_IN_PAD; | |
9f7d9405 | 1316 | |
b5c19bd7 | 1317 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 1318 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 1319 | new_capturep = out_capture ? out_capture : |
4608196e | 1320 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 | 1321 | |
7ef30830 FC |
1322 | offset = pad_findlex(namepv, namelen, |
1323 | flags | padadd_STALEOK*(new_capturep == &new_capture), | |
1324 | CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
b5c19bd7 | 1325 | new_capturep, out_name_sv, out_flags); |
9f7d9405 | 1326 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 1327 | return NOT_IN_PAD; |
9f7d9405 | 1328 | |
b5c19bd7 DM |
1329 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
1330 | ||
1331 | /* don't add new fake entries (via eval) to CVs that we have already | |
1332 | * finished compiling, or to undef CVs */ | |
1333 | if (CvCOMPILED(cv) || !padlist) | |
1334 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
1335 | ||
1336 | { | |
3291825f | 1337 | /* This relies on sv_setsv_flags() upgrading the destination to the same |
486ec47a | 1338 | type as the source, independent of the flags set, and on it being |
3291825f NC |
1339 | "good" and only copying flag bits and pointers that it understands. |
1340 | */ | |
1341 | SV *new_namesv = newSVsv(*out_name_sv); | |
53c1dcc0 AL |
1342 | AV * const ocomppad_name = PL_comppad_name; |
1343 | PAD * const ocomppad = PL_comppad; | |
86d2498c FC |
1344 | PL_comppad_name = PadlistARRAY(padlist)[0]; |
1345 | PL_comppad = PadlistARRAY(padlist)[1]; | |
b5c19bd7 DM |
1346 | PL_curpad = AvARRAY(PL_comppad); |
1347 | ||
3291825f | 1348 | new_offset |
cc76b5cc | 1349 | = pad_alloc_name(new_namesv, |
59cfed7d | 1350 | (SvPAD_STATE(*out_name_sv) ? padadd_STATE : 0), |
3291825f NC |
1351 | SvPAD_TYPED(*out_name_sv) |
1352 | ? SvSTASH(*out_name_sv) : NULL, | |
1353 | SvOURSTASH(*out_name_sv) | |
1354 | ); | |
1355 | ||
1356 | SvFAKE_on(new_namesv); | |
1357 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1358 | "Pad addname: %ld \"%.*s\" FAKE\n", | |
1359 | (long)new_offset, | |
1360 | (int) SvCUR(new_namesv), SvPVX(new_namesv))); | |
809abb02 | 1361 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 1362 | |
809abb02 | 1363 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 1364 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 1365 | NOOP; /* do nothing */ |
b5c19bd7 | 1366 | } |
71f882da | 1367 | else if (CvLATE(cv)) { |
b5c19bd7 | 1368 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 1369 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
1370 | CvCLONE_on(cv); |
1371 | } | |
1372 | else { | |
1373 | /* immediate creation - capture outer value right now */ | |
1374 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
81df9f6f FC |
1375 | /* But also note the offset, as newMYSUB needs it */ |
1376 | PARENT_PAD_INDEX_set(new_namesv, offset); | |
b5c19bd7 DM |
1377 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1378 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
1379 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 1380 | } |
b5c19bd7 | 1381 | *out_name_sv = new_namesv; |
809abb02 | 1382 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
1383 | |
1384 | PL_comppad_name = ocomppad_name; | |
1385 | PL_comppad = ocomppad; | |
4608196e | 1386 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 1387 | } |
b5c19bd7 | 1388 | return new_offset; |
dd2155a4 DM |
1389 | } |
1390 | ||
fb8a9836 | 1391 | #ifdef DEBUGGING |
cc76b5cc | 1392 | |
dd2155a4 | 1393 | /* |
cc76b5cc | 1394 | =for apidoc Am|SV *|pad_sv|PADOFFSET po |
dd2155a4 | 1395 | |
cc76b5cc | 1396 | Get the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1397 | Use macro PAD_SV instead of calling this function directly. |
1398 | ||
1399 | =cut | |
1400 | */ | |
1401 | ||
dd2155a4 DM |
1402 | SV * |
1403 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
1404 | { | |
97aff369 | 1405 | dVAR; |
f3548bdc | 1406 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 1407 | |
dd2155a4 DM |
1408 | if (!po) |
1409 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
1410 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1411 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1412 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
1413 | ); |
1414 | return PL_curpad[po]; | |
1415 | } | |
1416 | ||
dd2155a4 | 1417 | /* |
cc76b5cc | 1418 | =for apidoc Am|void|pad_setsv|PADOFFSET po|SV *sv |
dd2155a4 | 1419 | |
cc76b5cc | 1420 | Set the value at offset I<po> in the current (compiling or executing) pad. |
dd2155a4 DM |
1421 | Use the macro PAD_SETSV() rather than calling this function directly. |
1422 | ||
1423 | =cut | |
1424 | */ | |
1425 | ||
dd2155a4 DM |
1426 | void |
1427 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
1428 | { | |
97aff369 | 1429 | dVAR; |
7918f24d NC |
1430 | |
1431 | PERL_ARGS_ASSERT_PAD_SETSV; | |
1432 | ||
f3548bdc | 1433 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
1434 | |
1435 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1436 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 1437 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
1438 | ); |
1439 | PL_curpad[po] = sv; | |
1440 | } | |
dd2155a4 | 1441 | |
cc76b5cc | 1442 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1443 | |
1444 | /* | |
cc76b5cc | 1445 | =for apidoc m|void|pad_block_start|int full |
dd2155a4 | 1446 | |
e89fca5e | 1447 | Update the pad compilation state variables on entry to a new block. |
dd2155a4 DM |
1448 | |
1449 | =cut | |
1450 | */ | |
1451 | ||
1452 | /* XXX DAPM perhaps: | |
1453 | * - integrate this in general state-saving routine ??? | |
1454 | * - combine with the state-saving going on in pad_new ??? | |
1455 | * - introduce a new SAVE type that does all this in one go ? | |
1456 | */ | |
1457 | ||
1458 | void | |
1459 | Perl_pad_block_start(pTHX_ int full) | |
1460 | { | |
f3548bdc | 1461 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
1462 | SAVEI32(PL_comppad_name_floor); |
1463 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
1464 | if (full) | |
1465 | PL_comppad_name_fill = PL_comppad_name_floor; | |
1466 | if (PL_comppad_name_floor < 0) | |
1467 | PL_comppad_name_floor = 0; | |
1468 | SAVEI32(PL_min_intro_pending); | |
1469 | SAVEI32(PL_max_intro_pending); | |
1470 | PL_min_intro_pending = 0; | |
1471 | SAVEI32(PL_comppad_name_fill); | |
1472 | SAVEI32(PL_padix_floor); | |
1473 | PL_padix_floor = PL_padix; | |
1474 | PL_pad_reset_pending = FALSE; | |
1475 | } | |
1476 | ||
dd2155a4 | 1477 | /* |
cc76b5cc | 1478 | =for apidoc m|U32|intro_my |
dd2155a4 | 1479 | |
bf954566 FC |
1480 | "Introduce" my variables to visible status. This is called during parsing |
1481 | at the end of each statement to make lexical variables visible to | |
1482 | subsequent statements. | |
dd2155a4 DM |
1483 | |
1484 | =cut | |
1485 | */ | |
1486 | ||
1487 | U32 | |
1488 | Perl_intro_my(pTHX) | |
1489 | { | |
1490 | SV **svp; | |
dd2155a4 | 1491 | I32 i; |
6012dc80 | 1492 | U32 seq; |
dd2155a4 | 1493 | |
f3548bdc | 1494 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1495 | if (! PL_min_intro_pending) |
1496 | return PL_cop_seqmax; | |
1497 | ||
1498 | svp = AvARRAY(PL_comppad_name); | |
1499 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1500 | SV * const sv = svp[i]; |
1501 | ||
325e1816 | 1502 | if (sv && PadnameLEN(sv) && !SvFAKE(sv) |
0d311cdb DM |
1503 | && COP_SEQ_RANGE_LOW(sv) == PERL_PADSEQ_INTRO) |
1504 | { | |
2df5bdd7 | 1505 | COP_SEQ_RANGE_HIGH_set(sv, PERL_PADSEQ_INTRO); /* Don't know scope end yet. */ |
809abb02 | 1506 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 | 1507 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1508 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1509 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1510 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1511 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1512 | ); |
1513 | } | |
1514 | } | |
6012dc80 DM |
1515 | seq = PL_cop_seqmax; |
1516 | PL_cop_seqmax++; | |
1517 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ | |
1518 | PL_cop_seqmax++; | |
dd2155a4 DM |
1519 | PL_min_intro_pending = 0; |
1520 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1521 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
6012dc80 | 1522 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax))); |
dd2155a4 | 1523 | |
6012dc80 | 1524 | return seq; |
dd2155a4 DM |
1525 | } |
1526 | ||
1527 | /* | |
cc76b5cc | 1528 | =for apidoc m|void|pad_leavemy |
dd2155a4 DM |
1529 | |
1530 | Cleanup at end of scope during compilation: set the max seq number for | |
1531 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1532 | ||
1533 | =cut | |
1534 | */ | |
1535 | ||
6d5c2147 | 1536 | OP * |
dd2155a4 DM |
1537 | Perl_pad_leavemy(pTHX) |
1538 | { | |
1539 | I32 off; | |
6d5c2147 | 1540 | OP *o = NULL; |
551405c4 | 1541 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1542 | |
1543 | PL_pad_reset_pending = FALSE; | |
1544 | ||
f3548bdc | 1545 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1546 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1547 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 | 1548 | const SV * const sv = svp[off]; |
325e1816 | 1549 | if (sv && PadnameLEN(sv) && !SvFAKE(sv)) |
9b387841 NC |
1550 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1551 | "%"SVf" never introduced", | |
1552 | SVfARG(sv)); | |
dd2155a4 DM |
1553 | } |
1554 | } | |
1555 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1556 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
6d5c2147 | 1557 | SV * const sv = svp[off]; |
325e1816 | 1558 | if (sv && PadnameLEN(sv) && !SvFAKE(sv) |
2df5bdd7 DM |
1559 | && COP_SEQ_RANGE_HIGH(sv) == PERL_PADSEQ_INTRO) |
1560 | { | |
809abb02 | 1561 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 | 1562 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1563 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1564 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1565 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1566 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 | 1567 | ); |
6d5c2147 FC |
1568 | if (!PadnameIsSTATE(sv) && !PadnameIsOUR(sv) |
1569 | && *PadnamePV(sv) == '&' && PadnameLEN(sv) > 1) { | |
1570 | OP *kid = newOP(OP_INTROCV, 0); | |
1571 | kid->op_targ = off; | |
1572 | o = op_prepend_elem(OP_LINESEQ, kid, o); | |
1573 | } | |
dd2155a4 DM |
1574 | } |
1575 | } | |
1576 | PL_cop_seqmax++; | |
6012dc80 DM |
1577 | if (PL_cop_seqmax == PERL_PADSEQ_INTRO) /* not a legal value */ |
1578 | PL_cop_seqmax++; | |
dd2155a4 DM |
1579 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1580 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
6d5c2147 | 1581 | return o; |
dd2155a4 DM |
1582 | } |
1583 | ||
dd2155a4 | 1584 | /* |
cc76b5cc | 1585 | =for apidoc m|void|pad_swipe|PADOFFSET po|bool refadjust |
dd2155a4 DM |
1586 | |
1587 | Abandon the tmp in the current pad at offset po and replace with a | |
1588 | new one. | |
1589 | ||
1590 | =cut | |
1591 | */ | |
1592 | ||
1593 | void | |
1594 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1595 | { | |
f3548bdc | 1596 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1597 | if (!PL_curpad) |
1598 | return; | |
1599 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1600 | Perl_croak(aTHX_ "panic: pad_swipe curpad, %p!=%p", |
1601 | AvARRAY(PL_comppad), PL_curpad); | |
9100eeb1 Z |
1602 | if (!po || ((SSize_t)po) > AvFILLp(PL_comppad)) |
1603 | Perl_croak(aTHX_ "panic: pad_swipe po=%ld, fill=%ld", | |
1604 | (long)po, (long)AvFILLp(PL_comppad)); | |
dd2155a4 DM |
1605 | |
1606 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1607 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1608 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1609 | ||
dd2155a4 DM |
1610 | if (refadjust) |
1611 | SvREFCNT_dec(PL_curpad[po]); | |
1612 | ||
9ad9869c DM |
1613 | |
1614 | /* if pad tmps aren't shared between ops, then there's no need to | |
1615 | * create a new tmp when an existing op is freed */ | |
1616 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1617 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1618 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c | 1619 | #else |
ce0d59fd | 1620 | PL_curpad[po] = NULL; |
97bf4a8d | 1621 | #endif |
325e1816 | 1622 | if (PadnamelistMAX(PL_comppad_name) != -1 |
4891fdfa | 1623 | && (PADOFFSET)PadnamelistMAX(PL_comppad_name) >= po) { |
ce0d59fd FC |
1624 | if (PadnamelistARRAY(PL_comppad_name)[po]) { |
1625 | assert(!PadnameLEN(PadnamelistARRAY(PL_comppad_name)[po])); | |
1626 | } | |
325e1816 FC |
1627 | PadnamelistARRAY(PL_comppad_name)[po] = &PL_sv_undef; |
1628 | } | |
dd2155a4 DM |
1629 | if ((I32)po < PL_padix) |
1630 | PL_padix = po - 1; | |
1631 | } | |
1632 | ||
dd2155a4 | 1633 | /* |
cc76b5cc | 1634 | =for apidoc m|void|pad_reset |
dd2155a4 DM |
1635 | |
1636 | Mark all the current temporaries for reuse | |
1637 | ||
1638 | =cut | |
1639 | */ | |
1640 | ||
1641 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1642 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1643 | * on the stack by OPs that use them, there are several ways to get an alias | |
1644 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1645 | * We avoid doing this until we can think of a Better Way. | |
1646 | * GSAR 97-10-29 */ | |
1f676739 | 1647 | static void |
82af08ae | 1648 | S_pad_reset(pTHX) |
dd2155a4 DM |
1649 | { |
1650 | #ifdef USE_BROKEN_PAD_RESET | |
dd2155a4 | 1651 | if (AvARRAY(PL_comppad) != PL_curpad) |
5637ef5b NC |
1652 | Perl_croak(aTHX_ "panic: pad_reset curpad, %p!=%p", |
1653 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1654 | |
1655 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1656 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1657 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1658 | (long)PL_padix, (long)PL_padix_floor | |
1659 | ) | |
1660 | ); | |
1661 | ||
284167a5 | 1662 | if (!TAINTING_get) { /* Can't mix tainted and non-tainted temporaries. */ |
eb578fdb | 1663 | I32 po; |
dd2155a4 DM |
1664 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1665 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1666 | SvPADTMP_off(PL_curpad[po]); | |
1667 | } | |
1668 | PL_padix = PL_padix_floor; | |
1669 | } | |
1670 | #endif | |
1671 | PL_pad_reset_pending = FALSE; | |
1672 | } | |
1673 | ||
dd2155a4 | 1674 | /* |
cc76b5cc Z |
1675 | =for apidoc Amx|void|pad_tidy|padtidy_type type |
1676 | ||
1677 | Tidy up a pad at the end of compilation of the code to which it belongs. | |
1678 | Jobs performed here are: remove most stuff from the pads of anonsub | |
1679 | prototypes; give it a @_; mark temporaries as such. I<type> indicates | |
1680 | the kind of subroutine: | |
dd2155a4 | 1681 | |
cc76b5cc Z |
1682 | padtidy_SUB ordinary subroutine |
1683 | padtidy_SUBCLONE prototype for lexical closure | |
1684 | padtidy_FORMAT format | |
dd2155a4 DM |
1685 | |
1686 | =cut | |
1687 | */ | |
1688 | ||
1689 | /* XXX DAPM surely most of this stuff should be done properly | |
1690 | * at the right time beforehand, rather than going around afterwards | |
1691 | * cleaning up our mistakes ??? | |
1692 | */ | |
1693 | ||
1694 | void | |
1695 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1696 | { | |
27da23d5 | 1697 | dVAR; |
dd2155a4 | 1698 | |
f3548bdc | 1699 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 | 1700 | |
db21619c DM |
1701 | /* If this CV has had any 'eval-capable' ops planted in it: |
1702 | * i.e. it contains any of: | |
1703 | * | |
1704 | * * eval '...', | |
1705 | * * //ee, | |
1706 | * * use re 'eval'; /$var/ | |
1707 | * * /(?{..})/), | |
1708 | * | |
1709 | * Then any anon prototypes in the chain of CVs should be marked as | |
1710 | * cloneable, so that for example the eval's CV in | |
1711 | * | |
1712 | * sub { eval '$x' } | |
1713 | * | |
1714 | * gets the right CvOUTSIDE. If running with -d, *any* sub may | |
1715 | * potentially have an eval executed within it. | |
b5c19bd7 DM |
1716 | */ |
1717 | ||
1718 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1719 | const CV *cv; |
b5c19bd7 DM |
1720 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1721 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1722 | break; /* no need to mark already-compiled code */ | |
1723 | if (CvANON(cv)) { | |
1724 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1725 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1726 | CvCLONE_on(cv); | |
1727 | } | |
00cc8743 | 1728 | CvHASEVAL_on(cv); |
b5c19bd7 DM |
1729 | } |
1730 | } | |
1731 | ||
eb8137a9 | 1732 | /* extend namepad to match curpad */ |
dd2155a4 | 1733 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) |
a0714e2c | 1734 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1735 | |
1736 | if (type == padtidy_SUBCLONE) { | |
ce0d59fd | 1737 | SV ** const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1738 | PADOFFSET ix; |
b5c19bd7 | 1739 | |
dd2155a4 DM |
1740 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1741 | SV *namesv; | |
ce0d59fd | 1742 | if (!namep[ix]) namep[ix] = &PL_sv_undef; |
dd2155a4 | 1743 | |
dd2155a4 DM |
1744 | /* |
1745 | * The only things that a clonable function needs in its | |
3a6ce63a | 1746 | * pad are anonymous subs, constants and GVs. |
dd2155a4 DM |
1747 | * The rest are created anew during cloning. |
1748 | */ | |
ce0d59fd FC |
1749 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix]) |
1750 | || IS_PADGV(PL_curpad[ix])) | |
3a6ce63a | 1751 | continue; |
ce0d59fd FC |
1752 | namesv = namep[ix]; |
1753 | if (!(PadnamePV(namesv) && | |
3a6ce63a | 1754 | (!PadnameLEN(namesv) || *SvPVX_const(namesv) == '&'))) |
dd2155a4 DM |
1755 | { |
1756 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1757 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1758 | } |
1759 | } | |
1760 | } | |
1761 | else if (type == padtidy_SUB) { | |
1762 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1763 | AV * const av = newAV(); /* Will be @_ */ |
ad64d0ec | 1764 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1765 | AvREIFY_only(av); |
dd2155a4 DM |
1766 | } |
1767 | ||
4cee4ca8 | 1768 | if (type == padtidy_SUB || type == padtidy_FORMAT) { |
ce0d59fd | 1769 | SV ** const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1770 | PADOFFSET ix; |
dd2155a4 | 1771 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
ce0d59fd FC |
1772 | if (!namep[ix]) namep[ix] = &PL_sv_undef; |
1773 | if (!PL_curpad[ix] || SvIMMORTAL(PL_curpad[ix]) | |
1774 | || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
dd2155a4 | 1775 | continue; |
adf8f095 | 1776 | if (!SvPADMY(PL_curpad[ix])) { |
dd2155a4 | 1777 | SvPADTMP_on(PL_curpad[ix]); |
adf8f095 NC |
1778 | } else if (!SvFAKE(namep[ix])) { |
1779 | /* This is a work around for how the current implementation of | |
1780 | ?{ } blocks in regexps interacts with lexicals. | |
1781 | ||
1782 | One of our lexicals. | |
1783 | Can't do this on all lexicals, otherwise sub baz() won't | |
1784 | compile in | |
1785 | ||
1786 | my $foo; | |
1787 | ||
1788 | sub bar { ++$foo; } | |
1789 | ||
1790 | sub baz { ++$foo; } | |
1791 | ||
1792 | because completion of compiling &bar calling pad_tidy() | |
1793 | would cause (top level) $foo to be marked as stale, and | |
1794 | "no longer available". */ | |
1795 | SvPADSTALE_on(PL_curpad[ix]); | |
1796 | } | |
dd2155a4 DM |
1797 | } |
1798 | } | |
f3548bdc | 1799 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1800 | } |
1801 | ||
dd2155a4 | 1802 | /* |
cc76b5cc | 1803 | =for apidoc m|void|pad_free|PADOFFSET po |
dd2155a4 | 1804 | |
8627550a | 1805 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1806 | |
1807 | =cut | |
1808 | */ | |
1809 | ||
1810 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1811 | void | |
1812 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1813 | { | |
ad9e6ae1 | 1814 | SV *sv; |
f3548bdc | 1815 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1816 | if (!PL_curpad) |
1817 | return; | |
1818 | if (AvARRAY(PL_comppad) != PL_curpad) | |
5637ef5b NC |
1819 | Perl_croak(aTHX_ "panic: pad_free curpad, %p!=%p", |
1820 | AvARRAY(PL_comppad), PL_curpad); | |
dd2155a4 DM |
1821 | if (!po) |
1822 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1823 | ||
1824 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1825 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1826 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1827 | ); | |
1828 | ||
ad9e6ae1 DM |
1829 | |
1830 | sv = PL_curpad[po]; | |
1831 | if (sv && sv != &PL_sv_undef && !SvPADMY(sv)) | |
1832 | SvFLAGS(sv) &= ~SVs_PADTMP; | |
1833 | ||
dd2155a4 DM |
1834 | if ((I32)po < PL_padix) |
1835 | PL_padix = po - 1; | |
1836 | } | |
1837 | ||
dd2155a4 | 1838 | /* |
cc76b5cc | 1839 | =for apidoc m|void|do_dump_pad|I32 level|PerlIO *file|PADLIST *padlist|int full |
dd2155a4 DM |
1840 | |
1841 | Dump the contents of a padlist | |
1842 | ||
1843 | =cut | |
1844 | */ | |
1845 | ||
1846 | void | |
1847 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1848 | { | |
e1ec3a88 AL |
1849 | const AV *pad_name; |
1850 | const AV *pad; | |
dd2155a4 DM |
1851 | SV **pname; |
1852 | SV **ppad; | |
dd2155a4 DM |
1853 | I32 ix; |
1854 | ||
7918f24d NC |
1855 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1856 | ||
dd2155a4 DM |
1857 | if (!padlist) { |
1858 | return; | |
1859 | } | |
86d2498c FC |
1860 | pad_name = *PadlistARRAY(padlist); |
1861 | pad = PadlistARRAY(padlist)[1]; | |
dd2155a4 DM |
1862 | pname = AvARRAY(pad_name); |
1863 | ppad = AvARRAY(pad); | |
1864 | Perl_dump_indent(aTHX_ level, file, | |
1865 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1866 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1867 | ); | |
1868 | ||
1869 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1870 | const SV *namesv = pname[ix]; |
325e1816 | 1871 | if (namesv && !PadnameLEN(namesv)) { |
a0714e2c | 1872 | namesv = NULL; |
dd2155a4 DM |
1873 | } |
1874 | if (namesv) { | |
ee6cee0c DM |
1875 | if (SvFAKE(namesv)) |
1876 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1877 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1878 | (int) ix, |
1879 | PTR2UV(ppad[ix]), | |
1880 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1881 | SvPVX_const(namesv), |
809abb02 NC |
1882 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1883 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1884 | |
ee6cee0c DM |
1885 | ); |
1886 | else | |
1887 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1888 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1889 | (int) ix, |
1890 | PTR2UV(ppad[ix]), | |
1891 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1892 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1893 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1894 | SvPVX_const(namesv) |
ee6cee0c | 1895 | ); |
dd2155a4 DM |
1896 | } |
1897 | else if (full) { | |
1898 | Perl_dump_indent(aTHX_ level+1, file, | |
1899 | "%2d. 0x%"UVxf"<%lu>\n", | |
1900 | (int) ix, | |
1901 | PTR2UV(ppad[ix]), | |
1902 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1903 | ); | |
1904 | } | |
1905 | } | |
1906 | } | |
1907 | ||
cc76b5cc | 1908 | #ifdef DEBUGGING |
dd2155a4 DM |
1909 | |
1910 | /* | |
cc76b5cc | 1911 | =for apidoc m|void|cv_dump|CV *cv|const char *title |
dd2155a4 DM |
1912 | |
1913 | dump the contents of a CV | |
1914 | ||
1915 | =cut | |
1916 | */ | |
1917 | ||
dd2155a4 | 1918 | STATIC void |
e1ec3a88 | 1919 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1920 | { |
97aff369 | 1921 | dVAR; |
53c1dcc0 | 1922 | const CV * const outside = CvOUTSIDE(cv); |
b70d5558 | 1923 | PADLIST* const padlist = CvPADLIST(cv); |
dd2155a4 | 1924 | |
7918f24d NC |
1925 | PERL_ARGS_ASSERT_CV_DUMP; |
1926 | ||
dd2155a4 DM |
1927 | PerlIO_printf(Perl_debug_log, |
1928 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1929 | title, | |
1930 | PTR2UV(cv), | |
1931 | (CvANON(cv) ? "ANON" | |
71f882da | 1932 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1933 | : (cv == PL_main_cv) ? "MAIN" |
1934 | : CvUNIQUE(cv) ? "UNIQUE" | |
1935 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1936 | PTR2UV(outside), | |
1937 | (!outside ? "null" | |
1938 | : CvANON(outside) ? "ANON" | |
1939 | : (outside == PL_main_cv) ? "MAIN" | |
1940 | : CvUNIQUE(outside) ? "UNIQUE" | |
1941 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1942 | ||
1943 | PerlIO_printf(Perl_debug_log, | |
1944 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1945 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1946 | } | |
dd2155a4 | 1947 | |
cc76b5cc | 1948 | #endif /* DEBUGGING */ |
dd2155a4 DM |
1949 | |
1950 | /* | |
cc76b5cc | 1951 | =for apidoc Am|CV *|cv_clone|CV *proto |
dd2155a4 | 1952 | |
cc76b5cc Z |
1953 | Clone a CV, making a lexical closure. I<proto> supplies the prototype |
1954 | of the function: its code, pad structure, and other attributes. | |
1955 | The prototype is combined with a capture of outer lexicals to which the | |
1956 | code refers, which are taken from the currently-executing instance of | |
1957 | the immediately surrounding code. | |
dd2155a4 DM |
1958 | |
1959 | =cut | |
1960 | */ | |
1961 | ||
e10681aa FC |
1962 | static CV *S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside); |
1963 | ||
1964 | static void | |
5fab0186 | 1965 | S_cv_clone_pad(pTHX_ CV *proto, CV *cv, CV *outside, bool newcv) |
dd2155a4 | 1966 | { |
dd2155a4 | 1967 | I32 ix; |
b70d5558 | 1968 | PADLIST* const protopadlist = CvPADLIST(proto); |
9ef8d569 | 1969 | PAD *const protopad_name = *PadlistARRAY(protopadlist); |
86d2498c | 1970 | const PAD *const protopad = PadlistARRAY(protopadlist)[1]; |
53c1dcc0 AL |
1971 | SV** const pname = AvARRAY(protopad_name); |
1972 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1973 | const I32 fname = AvFILLp(protopad_name); |
1974 | const I32 fpad = AvFILLp(protopad); | |
b5c19bd7 | 1975 | SV** outpad; |
71f882da | 1976 | long depth; |
e07561e6 | 1977 | bool subclones = FALSE; |
7918f24d | 1978 | |
dd2155a4 DM |
1979 | assert(!CvUNIQUE(proto)); |
1980 | ||
1b5aaca6 FC |
1981 | /* Anonymous subs have a weak CvOUTSIDE pointer, so its value is not |
1982 | * reliable. The currently-running sub is always the one we need to | |
1983 | * close over. | |
8d88fe29 FC |
1984 | * For my subs, the currently-running sub may not be the one we want. |
1985 | * We have to check whether it is a clone of CvOUTSIDE. | |
1b5aaca6 FC |
1986 | * Note that in general for formats, CvOUTSIDE != find_runcv. |
1987 | * Since formats may be nested inside closures, CvOUTSIDE may point | |
71f882da | 1988 | * to a prototype; we instead want the cloned parent who called us. |
af41786f | 1989 | */ |
71f882da | 1990 | |
e07561e6 | 1991 | if (!outside) { |
ebfebee4 | 1992 | if (CvWEAKOUTSIDE(proto)) |
71f882da | 1993 | outside = find_runcv(NULL); |
e07561e6 | 1994 | else { |
af41786f | 1995 | outside = CvOUTSIDE(proto); |
db4cf31d FC |
1996 | if ((CvCLONE(outside) && ! CvCLONED(outside)) |
1997 | || !CvPADLIST(outside) | |
8771da69 FC |
1998 | || PadlistNAMES(CvPADLIST(outside)) |
1999 | != protopadlist->xpadl_outid) { | |
db4cf31d | 2000 | outside = find_runcv_where( |
a56015b9 | 2001 | FIND_RUNCV_padid_eq, PTR2IV(protopadlist->xpadl_outid), NULL |
70794f7b | 2002 | ); |
db4cf31d | 2003 | /* outside could be null */ |
5dff782d | 2004 | } |
e07561e6 | 2005 | } |
5dff782d | 2006 | } |
db4cf31d | 2007 | depth = outside ? CvDEPTH(outside) : 0; |
71f882da DM |
2008 | if (!depth) |
2009 | depth = 1; | |
b5c19bd7 | 2010 | |
dd2155a4 DM |
2011 | ENTER; |
2012 | SAVESPTR(PL_compcv); | |
e07561e6 | 2013 | PL_compcv = cv; |
5fab0186 | 2014 | if (newcv) SAVEFREESV(cv); /* in case of fatal warnings */ |
dd2155a4 | 2015 | |
a0d2bbd5 FC |
2016 | if (CvHASEVAL(cv)) |
2017 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); | |
dd2155a4 | 2018 | |
cbacc9aa | 2019 | SAVESPTR(PL_comppad_name); |
9ef8d569 | 2020 | PL_comppad_name = protopad_name; |
b7787f18 | 2021 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 2022 | |
b5c19bd7 | 2023 | av_fill(PL_comppad, fpad); |
dd2155a4 | 2024 | |
dd2155a4 DM |
2025 | PL_curpad = AvARRAY(PL_comppad); |
2026 | ||
db4cf31d | 2027 | outpad = outside && CvPADLIST(outside) |
86d2498c | 2028 | ? AvARRAY(PadlistARRAY(CvPADLIST(outside))[depth]) |
f2ead8b8 | 2029 | : NULL; |
8771da69 FC |
2030 | if (outpad) |
2031 | CvPADLIST(cv)->xpadl_outid = PadlistNAMES(CvPADLIST(outside)); | |
b5c19bd7 | 2032 | |
dd2155a4 | 2033 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
2034 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
2035 | SV *sv = NULL; | |
325e1816 | 2036 | if (namesv && PadnameLEN(namesv)) { /* lexical */ |
f2047bf1 FC |
2037 | if (PadnameIsOUR(namesv)) { /* or maybe not so lexical */ |
2038 | NOOP; | |
2039 | } | |
2040 | else { | |
b5c19bd7 | 2041 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
5aec98df FC |
2042 | /* formats may have an inactive, or even undefined, parent; |
2043 | but state vars are always available. */ | |
f2ead8b8 | 2044 | if (!outpad || !(sv = outpad[PARENT_PAD_INDEX(namesv)]) |
cae5dbbe | 2045 | || ( SvPADSTALE(sv) && !SvPAD_STATE(namesv) |
db4cf31d | 2046 | && (!outside || !CvDEPTH(outside))) ) { |
445f13ff | 2047 | S_unavailable(aTHX_ namesv); |
a0714e2c | 2048 | sv = NULL; |
71f882da | 2049 | } |
33894c1a | 2050 | else |
f84c484e | 2051 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 2052 | } |
71f882da | 2053 | if (!sv) { |
b15aece3 | 2054 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 2055 | if (sigil == '&') |
e07561e6 FC |
2056 | /* If there are state subs, we need to clone them, too. |
2057 | But they may need to close over variables we have | |
2058 | not cloned yet. So we will have to do a second | |
2059 | pass. Furthermore, there may be state subs clos- | |
2060 | ing over other state subs’ entries, so we have | |
2061 | to put a stub here and then clone into it on the | |
2062 | second pass. */ | |
6d5c2147 FC |
2063 | if (SvPAD_STATE(namesv) && !CvCLONED(ppad[ix])) { |
2064 | assert(SvTYPE(ppad[ix]) == SVt_PVCV); | |
2065 | subclones = 1; | |
2066 | sv = newSV_type(SVt_PVCV); | |
2067 | } | |
2068 | else if (PadnameLEN(namesv)>1 && !PadnameIsOUR(namesv)) | |
2069 | { | |
2070 | /* my sub */ | |
81df9f6f FC |
2071 | /* Just provide a stub, but name it. It will be |
2072 | upgrade to the real thing on scope entry. */ | |
2073 | sv = newSV_type(SVt_PVCV); | |
cf748c3c FC |
2074 | CvNAME_HEK_set( |
2075 | sv, | |
2076 | share_hek(SvPVX_const(namesv)+1, | |
2077 | SvCUR(namesv) - 1 | |
2078 | * (SvUTF8(namesv) ? -1 : 1), | |
2079 | 0) | |
2080 | ); | |
6d5c2147 FC |
2081 | } |
2082 | else sv = SvREFCNT_inc(ppad[ix]); | |
e1ec3a88 | 2083 | else if (sigil == '@') |
ad64d0ec | 2084 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 2085 | else if (sigil == '%') |
ad64d0ec | 2086 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2087 | else |
561b68a9 | 2088 | sv = newSV(0); |
235cc2e3 | 2089 | SvPADMY_on(sv); |
0d3b281c | 2090 | /* reset the 'assign only once' flag on each state var */ |
e07561e6 | 2091 | if (sigil != '&' && SvPAD_STATE(namesv)) |
0d3b281c | 2092 | SvPADSTALE_on(sv); |
dd2155a4 | 2093 | } |
f2047bf1 | 2094 | } |
dd2155a4 | 2095 | } |
3a6ce63a | 2096 | else if (IS_PADGV(ppad[ix]) || (namesv && PadnamePV(namesv))) { |
f84c484e | 2097 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
2098 | } |
2099 | else { | |
561b68a9 | 2100 | sv = newSV(0); |
dd2155a4 | 2101 | SvPADTMP_on(sv); |
dd2155a4 | 2102 | } |
71f882da | 2103 | PL_curpad[ix] = sv; |
dd2155a4 DM |
2104 | } |
2105 | ||
e07561e6 FC |
2106 | if (subclones) |
2107 | for (ix = fpad; ix > 0; ix--) { | |
2108 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; | |
2109 | if (namesv && namesv != &PL_sv_undef && !SvFAKE(namesv) | |
2110 | && SvPVX_const(namesv)[0] == '&' && SvPAD_STATE(namesv)) | |
2111 | S_cv_clone(aTHX_ (CV *)ppad[ix], (CV *)PL_curpad[ix], cv); | |
2112 | } | |
2113 | ||
5fab0186 | 2114 | if (newcv) SvREFCNT_inc_simple_void_NN(cv); |
e10681aa FC |
2115 | LEAVE; |
2116 | } | |
2117 | ||
2118 | static CV * | |
2119 | S_cv_clone(pTHX_ CV *proto, CV *cv, CV *outside) | |
2120 | { | |
20b7effb | 2121 | #ifdef USE_ITHREADS |
c04ef36e | 2122 | dVAR; |
20b7effb | 2123 | #endif |
5fab0186 | 2124 | const bool newcv = !cv; |
c04ef36e | 2125 | |
e10681aa FC |
2126 | assert(!CvUNIQUE(proto)); |
2127 | ||
2128 | if (!cv) cv = MUTABLE_CV(newSV_type(SvTYPE(proto))); | |
2129 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE|CVf_CVGV_RC | |
2130 | |CVf_SLABBED); | |
2131 | CvCLONED_on(cv); | |
2132 | ||
2133 | CvFILE(cv) = CvDYNFILE(proto) ? savepv(CvFILE(proto)) | |
2134 | : CvFILE(proto); | |
2135 | if (CvNAMED(proto)) | |
2e800d79 | 2136 | CvNAME_HEK_set(cv, share_hek_hek(CvNAME_HEK(proto))); |
e10681aa FC |
2137 | else CvGV_set(cv,CvGV(proto)); |
2138 | CvSTASH_set(cv, CvSTASH(proto)); | |
2139 | OP_REFCNT_LOCK; | |
2140 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); | |
2141 | OP_REFCNT_UNLOCK; | |
2142 | CvSTART(cv) = CvSTART(proto); | |
2143 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); | |
2144 | ||
fdf416b6 | 2145 | if (SvPOK(proto)) { |
e10681aa | 2146 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
fdf416b6 BF |
2147 | if (SvUTF8(proto)) |
2148 | SvUTF8_on(MUTABLE_SV(cv)); | |
2149 | } | |
e10681aa FC |
2150 | if (SvMAGIC(proto)) |
2151 | mg_copy((SV *)proto, (SV *)cv, 0, 0); | |
2152 | ||
5fab0186 | 2153 | if (CvPADLIST(proto)) S_cv_clone_pad(aTHX_ proto, cv, outside, newcv); |
e10681aa | 2154 | |
dd2155a4 DM |
2155 | DEBUG_Xv( |
2156 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
e10681aa | 2157 | if (CvOUTSIDE(cv)) cv_dump(CvOUTSIDE(cv), "Outside"); |
dd2155a4 DM |
2158 | cv_dump(proto, "Proto"); |
2159 | cv_dump(cv, "To"); | |
2160 | ); | |
2161 | ||
d3f8a934 AB |
2162 | if (CvCONST(cv)) { |
2163 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: | |
2164 | * The prototype was marked as a candiate for const-ization, | |
2165 | * so try to grab the current const value, and if successful, | |
2166 | * turn into a const sub: | |
2167 | */ | |
2168 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); | |
2169 | if (const_sv) { | |
2170 | SvREFCNT_dec_NN(cv); | |
2171 | /* For this calling case, op_const_sv returns a *copy*, which we | |
2172 | donate to newCONSTSUB. Yes, this is ugly, and should be killed. | |
2173 | Need to fix how lib/constant.pm works to eliminate this. */ | |
2174 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); | |
2175 | } | |
2176 | else { | |
2177 | CvCONST_off(cv); | |
2178 | } | |
2179 | } | |
2180 | ||
dd2155a4 DM |
2181 | return cv; |
2182 | } | |
2183 | ||
e07561e6 FC |
2184 | CV * |
2185 | Perl_cv_clone(pTHX_ CV *proto) | |
2186 | { | |
2187 | PERL_ARGS_ASSERT_CV_CLONE; | |
2188 | ||
fead5351 | 2189 | if (!CvPADLIST(proto)) Perl_croak(aTHX_ "panic: no pad in cv_clone"); |
e07561e6 FC |
2190 | return S_cv_clone(aTHX_ proto, NULL, NULL); |
2191 | } | |
2192 | ||
6d5c2147 FC |
2193 | /* Called only by pp_clonecv */ |
2194 | CV * | |
2195 | Perl_cv_clone_into(pTHX_ CV *proto, CV *target) | |
2196 | { | |
2197 | PERL_ARGS_ASSERT_CV_CLONE_INTO; | |
2198 | cv_undef(target); | |
2199 | return S_cv_clone(aTHX_ proto, target, NULL); | |
2200 | } | |
2201 | ||
dd2155a4 | 2202 | /* |
cc76b5cc | 2203 | =for apidoc m|void|pad_fixup_inner_anons|PADLIST *padlist|CV *old_cv|CV *new_cv |
dd2155a4 DM |
2204 | |
2205 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
72d33970 | 2206 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
7dafbf52 | 2207 | moved to a pre-existing CV struct. |
dd2155a4 DM |
2208 | |
2209 | =cut | |
2210 | */ | |
2211 | ||
2212 | void | |
2213 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
2214 | { | |
2215 | I32 ix; | |
86d2498c FC |
2216 | AV * const comppad_name = PadlistARRAY(padlist)[0]; |
2217 | AV * const comppad = PadlistARRAY(padlist)[1]; | |
53c1dcc0 AL |
2218 | SV ** const namepad = AvARRAY(comppad_name); |
2219 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
2220 | |
2221 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
2222 | PERL_UNUSED_ARG(old_cv); |
2223 | ||
dd2155a4 | 2224 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 2225 | const SV * const namesv = namepad[ix]; |
09a30bc4 | 2226 | if (namesv && namesv != &PL_sv_undef && !SvPAD_STATE(namesv) |
b15aece3 | 2227 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 2228 | { |
e09ac076 | 2229 | if (SvTYPE(curpad[ix]) == SVt_PVCV) { |
0afba48f FC |
2230 | MAGIC * const mg = |
2231 | SvMAGICAL(curpad[ix]) | |
2232 | ? mg_find(curpad[ix], PERL_MAGIC_proto) | |
2233 | : NULL; | |
2234 | CV * const innercv = MUTABLE_CV(mg ? mg->mg_obj : curpad[ix]); | |
2235 | if (CvOUTSIDE(innercv) == old_cv) { | |
1f122f9b FC |
2236 | if (!CvWEAKOUTSIDE(innercv)) { |
2237 | SvREFCNT_dec(old_cv); | |
2238 | SvREFCNT_inc_simple_void_NN(new_cv); | |
2239 | } | |
0afba48f FC |
2240 | CvOUTSIDE(innercv) = new_cv; |
2241 | } | |
e09ac076 FC |
2242 | } |
2243 | else { /* format reference */ | |
2244 | SV * const rv = curpad[ix]; | |
2245 | CV *innercv; | |
2246 | if (!SvOK(rv)) continue; | |
2247 | assert(SvROK(rv)); | |
2248 | assert(SvWEAKREF(rv)); | |
2249 | innercv = (CV *)SvRV(rv); | |
2250 | assert(!CvWEAKOUTSIDE(innercv)); | |
2251 | SvREFCNT_dec(CvOUTSIDE(innercv)); | |
2252 | CvOUTSIDE(innercv) = (CV *)SvREFCNT_inc_simple_NN(new_cv); | |
2253 | } | |
dd2155a4 DM |
2254 | } |
2255 | } | |
2256 | } | |
2257 | ||
2258 | /* | |
cc76b5cc | 2259 | =for apidoc m|void|pad_push|PADLIST *padlist|int depth |
dd2155a4 DM |
2260 | |
2261 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
2262 | this depth, in which case don't bother creating a new one. Then give |
2263 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
2264 | |
2265 | =cut | |
2266 | */ | |
2267 | ||
2268 | void | |
26019298 | 2269 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 2270 | { |
7918f24d NC |
2271 | PERL_ARGS_ASSERT_PAD_PUSH; |
2272 | ||
86d2498c FC |
2273 | if (depth > PadlistMAX(padlist) || !PadlistARRAY(padlist)[depth]) { |
2274 | PAD** const svp = PadlistARRAY(padlist); | |
44f8325f AL |
2275 | AV* const newpad = newAV(); |
2276 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
2277 | I32 ix = AvFILLp((const AV *)svp[1]); |
2278 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 2279 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
2280 | AV *av; |
2281 | ||
dd2155a4 | 2282 | for ( ;ix > 0; ix--) { |
325e1816 | 2283 | if (names_fill >= ix && PadnameLEN(names[ix])) { |
b15aece3 | 2284 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
2285 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
2286 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2287 | || sigil == '&') | |
2288 | { | |
dd2155a4 DM |
2289 | /* outer lexical or anon code */ |
2290 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
2291 | } | |
2292 | else { /* our own lexical */ | |
26019298 AL |
2293 | SV *sv; |
2294 | if (sigil == '@') | |
ad64d0ec | 2295 | sv = MUTABLE_SV(newAV()); |
26019298 | 2296 | else if (sigil == '%') |
ad64d0ec | 2297 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 2298 | else |
561b68a9 | 2299 | sv = newSV(0); |
26019298 | 2300 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2301 | SvPADMY_on(sv); |
2302 | } | |
2303 | } | |
5d719198 | 2304 | else if (IS_PADGV(oldpad[ix]) || PadnamePV(names[ix])) { |
f84c484e | 2305 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
2306 | } |
2307 | else { | |
2308 | /* save temporaries on recursion? */ | |
561b68a9 | 2309 | SV * const sv = newSV(0); |
26019298 | 2310 | av_store(newpad, ix, sv); |
dd2155a4 DM |
2311 | SvPADTMP_on(sv); |
2312 | } | |
2313 | } | |
26019298 | 2314 | av = newAV(); |
ad64d0ec | 2315 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 2316 | AvREIFY_only(av); |
26019298 | 2317 | |
7261499d | 2318 | padlist_store(padlist, depth, newpad); |
dd2155a4 DM |
2319 | } |
2320 | } | |
b21dc031 | 2321 | |
cc76b5cc Z |
2322 | /* |
2323 | =for apidoc Am|HV *|pad_compname_type|PADOFFSET po | |
2324 | ||
2325 | Looks up the type of the lexical variable at position I<po> in the | |
2326 | currently-compiling pad. If the variable is typed, the stash of the | |
2327 | class to which it is typed is returned. If not, C<NULL> is returned. | |
2328 | ||
2329 | =cut | |
2330 | */ | |
b21dc031 AL |
2331 | |
2332 | HV * | |
2333 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
2334 | { | |
3769e90d DD |
2335 | SV* const av = PAD_COMPNAME_SV(po); |
2336 | if ( SvPAD_TYPED(av) ) { | |
2337 | return SvSTASH(av); | |
b21dc031 | 2338 | } |
5c284bb0 | 2339 | return NULL; |
b21dc031 | 2340 | } |
66610fdd | 2341 | |
d5b1589c NC |
2342 | #if defined(USE_ITHREADS) |
2343 | ||
2344 | # define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) | |
2345 | ||
cc76b5cc | 2346 | /* |
b70d5558 | 2347 | =for apidoc padlist_dup |
cc76b5cc Z |
2348 | |
2349 | Duplicates a pad. | |
2350 | ||
2351 | =cut | |
2352 | */ | |
2353 | ||
b70d5558 FC |
2354 | PADLIST * |
2355 | Perl_padlist_dup(pTHX_ PADLIST *srcpad, CLONE_PARAMS *param) | |
d5b1589c | 2356 | { |
7261499d FC |
2357 | PADLIST *dstpad; |
2358 | bool cloneall; | |
2359 | PADOFFSET max; | |
2360 | ||
d5b1589c NC |
2361 | PERL_ARGS_ASSERT_PADLIST_DUP; |
2362 | ||
2363 | if (!srcpad) | |
2364 | return NULL; | |
2365 | ||
7261499d | 2366 | cloneall = param->flags & CLONEf_COPY_STACKS |
86d2498c FC |
2367 | || SvREFCNT(PadlistARRAY(srcpad)[1]) > 1; |
2368 | assert (SvREFCNT(PadlistARRAY(srcpad)[1]) == 1); | |
7261499d | 2369 | |
86d2498c | 2370 | max = cloneall ? PadlistMAX(srcpad) : 1; |
7261499d FC |
2371 | |
2372 | Newx(dstpad, 1, PADLIST); | |
2373 | ptr_table_store(PL_ptr_table, srcpad, dstpad); | |
86d2498c FC |
2374 | PadlistMAX(dstpad) = max; |
2375 | Newx(PadlistARRAY(dstpad), max + 1, PAD *); | |
7261499d FC |
2376 | |
2377 | if (cloneall) { | |
2378 | PADOFFSET depth; | |
2379 | for (depth = 0; depth <= max; ++depth) | |
86d2498c FC |
2380 | PadlistARRAY(dstpad)[depth] = |
2381 | av_dup_inc(PadlistARRAY(srcpad)[depth], param); | |
6de654a5 NC |
2382 | } else { |
2383 | /* CvDEPTH() on our subroutine will be set to 0, so there's no need | |
2384 | to build anything other than the first level of pads. */ | |
86d2498c | 2385 | I32 ix = AvFILLp(PadlistARRAY(srcpad)[1]); |
6de654a5 | 2386 | AV *pad1; |
86d2498c FC |
2387 | const I32 names_fill = AvFILLp(PadlistARRAY(srcpad)[0]); |
2388 | const PAD *const srcpad1 = PadlistARRAY(srcpad)[1]; | |
6de654a5 NC |
2389 | SV **oldpad = AvARRAY(srcpad1); |
2390 | SV **names; | |
2391 | SV **pad1a; | |
2392 | AV *args; | |
6de654a5 | 2393 | |
86d2498c FC |
2394 | PadlistARRAY(dstpad)[0] = |
2395 | av_dup_inc(PadlistARRAY(srcpad)[0], param); | |
2396 | names = AvARRAY(PadlistARRAY(dstpad)[0]); | |
6de654a5 NC |
2397 | |
2398 | pad1 = newAV(); | |
2399 | ||
2400 | av_extend(pad1, ix); | |
86d2498c | 2401 | PadlistARRAY(dstpad)[1] = pad1; |
6de654a5 | 2402 | pad1a = AvARRAY(pad1); |
6de654a5 NC |
2403 | |
2404 | if (ix > -1) { | |
2405 | AvFILLp(pad1) = ix; | |
2406 | ||
2407 | for ( ;ix > 0; ix--) { | |
05d04d9c NC |
2408 | if (!oldpad[ix]) { |
2409 | pad1a[ix] = NULL; | |
ce0d59fd FC |
2410 | } else if (names_fill >= ix && names[ix] && |
2411 | PadnameLEN(names[ix])) { | |
05d04d9c NC |
2412 | const char sigil = SvPVX_const(names[ix])[0]; |
2413 | if ((SvFLAGS(names[ix]) & SVf_FAKE) | |
2414 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
2415 | || sigil == '&') | |
2416 | { | |
2417 | /* outer lexical or anon code */ | |
2418 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); | |
2419 | } | |
2420 | else { /* our own lexical */ | |
adf8f095 NC |
2421 | if(SvPADSTALE(oldpad[ix]) && SvREFCNT(oldpad[ix]) > 1) { |
2422 | /* This is a work around for how the current | |
2423 | implementation of ?{ } blocks in regexps | |
2424 | interacts with lexicals. */ | |
05d04d9c NC |
2425 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2426 | } else { | |
2427 | SV *sv; | |
2428 | ||
2429 | if (sigil == '@') | |
2430 | sv = MUTABLE_SV(newAV()); | |
2431 | else if (sigil == '%') | |
2432 | sv = MUTABLE_SV(newHV()); | |
2433 | else | |
2434 | sv = newSV(0); | |
2435 | pad1a[ix] = sv; | |
2436 | SvPADMY_on(sv); | |
2437 | } | |
2438 | } | |
2439 | } | |
ce0d59fd FC |
2440 | else if (IS_PADGV(oldpad[ix]) |
2441 | || ( names_fill >= ix && names[ix] | |
2442 | && PadnamePV(names[ix]) )) { | |
05d04d9c NC |
2443 | pad1a[ix] = sv_dup_inc(oldpad[ix], param); |
2444 | } | |
2445 | else { | |
2446 | /* save temporaries on recursion? */ | |
2447 | SV * const sv = newSV(0); | |
2448 | pad1a[ix] = sv; | |
2449 | ||
2450 | /* SvREFCNT(oldpad[ix]) != 1 for some code in threads.xs | |
2451 | FIXTHAT before merging this branch. | |
2452 | (And I know how to) */ | |
2453 | if (SvPADMY(oldpad[ix])) | |
2454 | SvPADMY_on(sv); | |
2455 | else | |
2456 | SvPADTMP_on(sv); | |
2457 | } | |
6de654a5 NC |
2458 | } |
2459 | ||
2460 | if (oldpad[0]) { | |
2461 | args = newAV(); /* Will be @_ */ | |
2462 | AvREIFY_only(args); | |
2463 | pad1a[0] = (SV *)args; | |
2464 | } | |
2465 | } | |
2466 | } | |
d5b1589c NC |
2467 | |
2468 | return dstpad; | |
2469 | } | |
2470 | ||
cc76b5cc | 2471 | #endif /* USE_ITHREADS */ |
d5b1589c | 2472 | |
7261499d | 2473 | PAD ** |
5aaab254 | 2474 | Perl_padlist_store(pTHX_ PADLIST *padlist, I32 key, PAD *val) |
7261499d | 2475 | { |
7261499d | 2476 | PAD **ary; |
86d2498c | 2477 | SSize_t const oldmax = PadlistMAX(padlist); |
7261499d FC |
2478 | |
2479 | PERL_ARGS_ASSERT_PADLIST_STORE; | |
2480 | ||
2481 | assert(key >= 0); | |
2482 | ||
86d2498c FC |
2483 | if (key > PadlistMAX(padlist)) { |
2484 | av_extend_guts(NULL,key,&PadlistMAX(padlist), | |
2485 | (SV ***)&PadlistARRAY(padlist), | |
2486 | (SV ***)&PadlistARRAY(padlist)); | |
2487 | Zero(PadlistARRAY(padlist)+oldmax+1, PadlistMAX(padlist)-oldmax, | |
7261499d FC |
2488 | PAD *); |
2489 | } | |
86d2498c | 2490 | ary = PadlistARRAY(padlist); |
7261499d FC |
2491 | SvREFCNT_dec(ary[key]); |
2492 | ary[key] = val; | |
2493 | return &ary[key]; | |
2494 | } | |
2495 | ||
66610fdd RGS |
2496 | /* |
2497 | * Local variables: | |
2498 | * c-indentation-style: bsd | |
2499 | * c-basic-offset: 4 | |
14d04a33 | 2500 | * indent-tabs-mode: nil |
66610fdd RGS |
2501 | * End: |
2502 | * | |
14d04a33 | 2503 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 2504 | */ |