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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 | ||
61296642 | 30 | This file contains the functions that create and manipulate scratchpads, |
166f8a29 | 31 | which are array-of-array data structures attached to a CV (ie a sub) |
61296642 | 32 | and which store lexical variables and opcode temporary and per-thread |
166f8a29 DM |
33 | values. |
34 | ||
dd2155a4 DM |
35 | =for apidoc m|AV *|CvPADLIST|CV *cv |
36 | CV's can have CvPADLIST(cv) set to point to an AV. | |
37 | ||
38 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
39 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
40 | executing). Require'd files are simply evals without any outer lexical |
41 | scope. | |
dd2155a4 DM |
42 | |
43 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
44 | but that is really the callers pad (a slot of which is allocated by | |
45 | every entersub). | |
46 | ||
47 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
f3548bdc | 48 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 DM |
49 | The items in the AV are not SVs as for a normal AV, but other AVs: |
50 | ||
51 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
52 | the "static type information" for lexicals. | |
53 | ||
54 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
55 | depth of recursion into the CV. | |
56 | The 0'th slot of a frame AV is an AV which is @_. | |
57 | other entries are storage for variables and op targets. | |
58 | ||
59 | During compilation: | |
a6d05634 TM |
60 | C<PL_comppad_name> is set to the names AV. |
61 | C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1. | |
62 | C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)). | |
dd2155a4 | 63 | |
f3548bdc DM |
64 | During execution, C<PL_comppad> and C<PL_curpad> refer to the live |
65 | frame of the currently executing sub. | |
66 | ||
67 | Iterating over the names AV iterates over all possible pad | |
dd2155a4 DM |
68 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
69 | &PL_sv_undef "names" (see pad_alloc()). | |
70 | ||
71 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
72 | The rest are op targets/GVs/constants which are statically allocated | |
73 | or resolved at compile time. These don't have names by which they | |
74 | can be looked up from Perl code at run time through eval"" like | |
75 | my/our variables can be. Since they can't be looked up by "name" | |
76 | but only by their index allocated at compile time (which is usually | |
77 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
78 | ||
79 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 NC |
80 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
81 | which the name is valid. For typed lexicals name SV is SVt_PVMG and SvSTASH | |
82 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the | |
73d95100 | 83 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 84 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 85 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 86 | |
b5c19bd7 DM |
87 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
88 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
3441fb63 NC |
89 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
90 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 91 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 92 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
93 | within the parent's pad where the lexical's value is stored, to make |
94 | cloning quicker. | |
dd2155a4 | 95 | |
a6d05634 | 96 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
97 | is a CV representing a possible closure. |
98 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
99 | become so if C<my sub foo {}> is implemented.) | |
100 | ||
71f882da DM |
101 | Note that formats are treated as anon subs, and are cloned each time |
102 | write is called (if necessary). | |
103 | ||
e6e7068b DM |
104 | The flag SVf_PADSTALE is cleared on lexicals each time the my() is executed, |
105 | and set on scope exit. This allows the 'Variable $x is not available' warning | |
106 | to be generated in evals, such as | |
107 | ||
108 | { my $x = 1; sub f { eval '$x'} } f(); | |
109 | ||
d1186544 DM |
110 | For state vars, SVf_PADSTALE is overloaded to mean 'not yet initialised' |
111 | ||
dd2155a4 DM |
112 | =cut |
113 | */ | |
114 | ||
115 | ||
116 | #include "EXTERN.h" | |
117 | #define PERL_IN_PAD_C | |
118 | #include "perl.h" | |
952306ac | 119 | #include "keywords.h" |
dd2155a4 | 120 | |
3441fb63 NC |
121 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
122 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
123 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
124 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 125 | |
3441fb63 NC |
126 | #define PARENT_PAD_INDEX_set(sv,val) \ |
127 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
128 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
129 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 130 | |
c8185ac5 | 131 | #define PAD_MAX I32_MAX |
dd2155a4 | 132 | |
1dba731d NC |
133 | #ifdef PERL_MAD |
134 | void pad_peg(const char* s) { | |
135 | static int pegcnt; | |
7918f24d NC |
136 | |
137 | PERL_ARGS_ASSERT_PAD_PEG; | |
138 | ||
1dba731d NC |
139 | pegcnt++; |
140 | } | |
141 | #endif | |
dd2155a4 DM |
142 | |
143 | /* | |
144 | =for apidoc pad_new | |
145 | ||
146 | Create a new compiling padlist, saving and updating the various global | |
147 | vars at the same time as creating the pad itself. The following flags | |
148 | can be OR'ed together: | |
149 | ||
150 | padnew_CLONE this pad is for a cloned CV | |
151 | padnew_SAVE save old globals | |
152 | padnew_SAVESUB also save extra stuff for start of sub | |
153 | ||
154 | =cut | |
155 | */ | |
156 | ||
157 | PADLIST * | |
c7c737cb | 158 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 159 | { |
97aff369 | 160 | dVAR; |
e1ec3a88 | 161 | AV *padlist, *padname, *pad; |
dd2155a4 | 162 | |
f3548bdc DM |
163 | ASSERT_CURPAD_LEGAL("pad_new"); |
164 | ||
dd2155a4 DM |
165 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
166 | * vars (based on flags) rather than storing vals + addresses for | |
167 | * each individually. Also see pad_block_start. | |
168 | * XXX DAPM Try to see whether all these conditionals are required | |
169 | */ | |
170 | ||
171 | /* save existing state, ... */ | |
172 | ||
173 | if (flags & padnew_SAVE) { | |
3979c56f | 174 | SAVECOMPPAD(); |
dd2155a4 DM |
175 | SAVESPTR(PL_comppad_name); |
176 | if (! (flags & padnew_CLONE)) { | |
177 | SAVEI32(PL_padix); | |
178 | SAVEI32(PL_comppad_name_fill); | |
179 | SAVEI32(PL_min_intro_pending); | |
180 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 181 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 | 182 | if (flags & padnew_SAVESUB) { |
f0cb02e3 | 183 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 DM |
184 | } |
185 | } | |
186 | } | |
187 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
188 | * saved - check at some pt that this is okay */ | |
189 | ||
190 | /* ... create new pad ... */ | |
191 | ||
192 | padlist = newAV(); | |
193 | padname = newAV(); | |
194 | pad = newAV(); | |
195 | ||
196 | if (flags & padnew_CLONE) { | |
197 | /* XXX DAPM I dont know why cv_clone needs it | |
198 | * doing differently yet - perhaps this separate branch can be | |
199 | * dispensed with eventually ??? | |
200 | */ | |
201 | ||
e1ec3a88 | 202 | AV * const a0 = newAV(); /* will be @_ */ |
dd2155a4 | 203 | av_extend(a0, 0); |
ad64d0ec | 204 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 | 205 | AvREIFY_only(a0); |
dd2155a4 DM |
206 | } |
207 | else { | |
a0714e2c | 208 | av_store(pad, 0, NULL); |
dd2155a4 DM |
209 | } |
210 | ||
211 | AvREAL_off(padlist); | |
ad64d0ec NC |
212 | av_store(padlist, 0, MUTABLE_SV(padname)); |
213 | av_store(padlist, 1, MUTABLE_SV(pad)); | |
dd2155a4 DM |
214 | |
215 | /* ... then update state variables */ | |
216 | ||
502c6561 NC |
217 | PL_comppad_name = MUTABLE_AV((*av_fetch(padlist, 0, FALSE))); |
218 | PL_comppad = MUTABLE_AV((*av_fetch(padlist, 1, FALSE))); | |
dd2155a4 DM |
219 | PL_curpad = AvARRAY(PL_comppad); |
220 | ||
221 | if (! (flags & padnew_CLONE)) { | |
222 | PL_comppad_name_fill = 0; | |
223 | PL_min_intro_pending = 0; | |
224 | PL_padix = 0; | |
b5c19bd7 | 225 | PL_cv_has_eval = 0; |
dd2155a4 DM |
226 | } |
227 | ||
228 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 229 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 230 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 231 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
232 | PTR2UV(padname), (UV)flags |
233 | ) | |
234 | ); | |
235 | ||
236 | return (PADLIST*)padlist; | |
237 | } | |
238 | ||
239 | /* | |
240 | =for apidoc pad_undef | |
241 | ||
242 | Free the padlist associated with a CV. | |
243 | If parts of it happen to be current, we null the relevant | |
244 | PL_*pad* global vars so that we don't have any dangling references left. | |
245 | We also repoint the CvOUTSIDE of any about-to-be-orphaned | |
a3985cdc | 246 | inner subs to the outer of this cv. |
dd2155a4 | 247 | |
7dafbf52 DM |
248 | (This function should really be called pad_free, but the name was already |
249 | taken) | |
250 | ||
dd2155a4 DM |
251 | =cut |
252 | */ | |
253 | ||
254 | void | |
a3985cdc | 255 | Perl_pad_undef(pTHX_ CV* cv) |
dd2155a4 | 256 | { |
97aff369 | 257 | dVAR; |
dd2155a4 | 258 | I32 ix; |
b64e5050 | 259 | const PADLIST * const padlist = CvPADLIST(cv); |
dd2155a4 | 260 | |
7918f24d NC |
261 | PERL_ARGS_ASSERT_PAD_UNDEF; |
262 | ||
1dba731d | 263 | pad_peg("pad_undef"); |
dd2155a4 DM |
264 | if (!padlist) |
265 | return; | |
0565a181 | 266 | if (SvIS_FREED(padlist)) /* may be during global destruction */ |
dd2155a4 DM |
267 | return; |
268 | ||
269 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
503de470 DM |
270 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", |
271 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
dd2155a4 DM |
272 | ); |
273 | ||
7dafbf52 DM |
274 | /* detach any '&' anon children in the pad; if afterwards they |
275 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
276 | * bypassing us. */ | |
277 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
278 | * children, or integrate this loop with general cleanup */ | |
dd2155a4 | 279 | |
7dafbf52 | 280 | if (!PL_dirty) { /* don't bother during global destruction */ |
53c1dcc0 | 281 | CV * const outercv = CvOUTSIDE(cv); |
e1ec3a88 | 282 | const U32 seq = CvOUTSIDE_SEQ(cv); |
502c6561 | 283 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
53c1dcc0 | 284 | SV ** const namepad = AvARRAY(comppad_name); |
502c6561 | 285 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); |
53c1dcc0 | 286 | SV ** const curpad = AvARRAY(comppad); |
dd2155a4 | 287 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
504618e9 | 288 | SV * const namesv = namepad[ix]; |
dd2155a4 | 289 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 290 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 291 | { |
ea726b52 | 292 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
10dc53a8 DM |
293 | U32 inner_rc = SvREFCNT(innercv); |
294 | assert(inner_rc); | |
a0714e2c | 295 | namepad[ix] = NULL; |
7dafbf52 | 296 | SvREFCNT_dec(namesv); |
01773faa DM |
297 | |
298 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
a0714e2c | 299 | curpad[ix] = NULL; |
01773faa | 300 | SvREFCNT_dec(innercv); |
10dc53a8 | 301 | inner_rc--; |
01773faa | 302 | } |
b37c2d43 AL |
303 | |
304 | /* in use, not just a prototype */ | |
305 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
7dafbf52 | 306 | assert(CvWEAKOUTSIDE(innercv)); |
9d1ce744 JH |
307 | /* don't relink to grandfather if he's being freed */ |
308 | if (outercv && SvREFCNT(outercv)) { | |
309 | CvWEAKOUTSIDE_off(innercv); | |
310 | CvOUTSIDE(innercv) = outercv; | |
311 | CvOUTSIDE_SEQ(innercv) = seq; | |
f84c484e | 312 | SvREFCNT_inc_simple_void_NN(outercv); |
9d1ce744 JH |
313 | } |
314 | else { | |
601f1833 | 315 | CvOUTSIDE(innercv) = NULL; |
9d1ce744 | 316 | } |
dd2155a4 DM |
317 | } |
318 | } | |
319 | } | |
320 | } | |
7dafbf52 | 321 | |
dd2155a4 DM |
322 | ix = AvFILLp(padlist); |
323 | while (ix >= 0) { | |
5fe77bf8 | 324 | SV* const sv = AvARRAY(padlist)[ix--]; |
b37c2d43 | 325 | if (sv) { |
ad64d0ec | 326 | if (sv == (const SV *)PL_comppad_name) |
b37c2d43 | 327 | PL_comppad_name = NULL; |
ad64d0ec | 328 | else if (sv == (const SV *)PL_comppad) { |
b37c2d43 AL |
329 | PL_comppad = NULL; |
330 | PL_curpad = NULL; | |
331 | } | |
dd2155a4 DM |
332 | } |
333 | SvREFCNT_dec(sv); | |
334 | } | |
ad64d0ec | 335 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); |
4608196e | 336 | CvPADLIST(cv) = NULL; |
dd2155a4 DM |
337 | } |
338 | ||
339 | ||
340 | ||
341 | ||
342 | /* | |
343 | =for apidoc pad_add_name | |
344 | ||
b5c19bd7 DM |
345 | Create a new name and associated PADMY SV in the current pad; return the |
346 | offset. | |
dd2155a4 DM |
347 | If C<typestash> is valid, the name is for a typed lexical; set the |
348 | name's stash to that value. | |
349 | If C<ourstash> is valid, it's an our lexical, set the name's | |
73d95100 | 350 | SvOURSTASH to that value |
dd2155a4 | 351 | |
dd2155a4 DM |
352 | If fake, it means we're cloning an existing entry |
353 | ||
354 | =cut | |
355 | */ | |
356 | ||
dd2155a4 | 357 | PADOFFSET |
952306ac | 358 | Perl_pad_add_name(pTHX_ const char *name, HV* typestash, HV* ourstash, bool fake, bool state) |
dd2155a4 | 359 | { |
97aff369 | 360 | dVAR; |
504618e9 | 361 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
b9f83d2f NC |
362 | SV* const namesv |
363 | = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
dd2155a4 | 364 | |
7918f24d NC |
365 | PERL_ARGS_ASSERT_PAD_ADD_NAME; |
366 | ||
f3548bdc DM |
367 | ASSERT_CURPAD_ACTIVE("pad_add_name"); |
368 | ||
dd2155a4 DM |
369 | sv_setpv(namesv, name); |
370 | ||
371 | if (typestash) { | |
63f10712 | 372 | assert(SvTYPE(namesv) == SVt_PVMG); |
00b1698f | 373 | SvPAD_TYPED_on(namesv); |
ad64d0ec | 374 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); |
dd2155a4 DM |
375 | } |
376 | if (ourstash) { | |
00b1698f | 377 | SvPAD_OUR_on(namesv); |
73d95100 | 378 | SvOURSTASH_set(namesv, ourstash); |
f84c484e | 379 | SvREFCNT_inc_simple_void_NN(ourstash); |
dd2155a4 | 380 | } |
952306ac RGS |
381 | else if (state) { |
382 | SvPAD_STATE_on(namesv); | |
383 | } | |
dd2155a4 DM |
384 | |
385 | av_store(PL_comppad_name, offset, namesv); | |
b5c19bd7 | 386 | if (fake) { |
dd2155a4 | 387 | SvFAKE_on(namesv); |
b5c19bd7 DM |
388 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
389 | "Pad addname: %ld \"%s\" FAKE\n", (long)offset, name)); | |
390 | } | |
dd2155a4 | 391 | else { |
ee6cee0c | 392 | /* not yet introduced */ |
809abb02 NC |
393 | COP_SEQ_RANGE_LOW_set(namesv, PAD_MAX); /* min */ |
394 | COP_SEQ_RANGE_HIGH_set(namesv, 0); /* max */ | |
ee6cee0c | 395 | |
dd2155a4 DM |
396 | if (!PL_min_intro_pending) |
397 | PL_min_intro_pending = offset; | |
398 | PL_max_intro_pending = offset; | |
b5c19bd7 | 399 | /* if it's not a simple scalar, replace with an AV or HV */ |
f3548bdc DM |
400 | /* XXX DAPM since slot has been allocated, replace |
401 | * av_store with PL_curpad[offset] ? */ | |
dd2155a4 | 402 | if (*name == '@') |
ad64d0ec | 403 | av_store(PL_comppad, offset, MUTABLE_SV(newAV())); |
dd2155a4 | 404 | else if (*name == '%') |
ad64d0ec | 405 | av_store(PL_comppad, offset, MUTABLE_SV(newHV())); |
dd2155a4 | 406 | SvPADMY_on(PL_curpad[offset]); |
b5c19bd7 DM |
407 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
408 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
409 | (long)offset, name, PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
410 | } |
411 | ||
412 | return offset; | |
413 | } | |
414 | ||
415 | ||
416 | ||
417 | ||
418 | /* | |
419 | =for apidoc pad_alloc | |
420 | ||
421 | Allocate a new my or tmp pad entry. For a my, simply push a null SV onto | |
422 | the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards | |
cf525c36 | 423 | for a slot which has no name and no active value. |
dd2155a4 DM |
424 | |
425 | =cut | |
426 | */ | |
427 | ||
428 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
429 | * or at least rationalise ??? */ | |
6d640399 NC |
430 | /* And flag whether the incoming name is UTF8 or 8 bit? |
431 | Could do this either with the +ve/-ve hack of the HV code, or expanding | |
432 | the flag bits. Either way, this makes proper Unicode safe pad support. | |
6d640399 NC |
433 | NWC |
434 | */ | |
dd2155a4 DM |
435 | |
436 | PADOFFSET | |
437 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
438 | { | |
97aff369 | 439 | dVAR; |
dd2155a4 DM |
440 | SV *sv; |
441 | I32 retval; | |
442 | ||
6136c704 | 443 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
444 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
445 | ||
dd2155a4 DM |
446 | if (AvARRAY(PL_comppad) != PL_curpad) |
447 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
448 | if (PL_pad_reset_pending) | |
449 | pad_reset(); | |
450 | if (tmptype & SVs_PADMY) { | |
235cc2e3 | 451 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
452 | retval = AvFILLp(PL_comppad); |
453 | } | |
454 | else { | |
551405c4 | 455 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 456 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
457 | for (;;) { |
458 | /* | |
459 | * "foreach" index vars temporarily become aliases to non-"my" | |
460 | * values. Thus we must skip, not just pad values that are | |
461 | * marked as current pad values, but also those with names. | |
462 | */ | |
463 | /* HVDS why copy to sv here? we don't seem to use it */ | |
464 | if (++PL_padix <= names_fill && | |
465 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
466 | continue; | |
467 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
468 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
469 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
470 | break; | |
471 | } | |
472 | retval = PL_padix; | |
473 | } | |
474 | SvFLAGS(sv) |= tmptype; | |
475 | PL_curpad = AvARRAY(PL_comppad); | |
476 | ||
477 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
478 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
479 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
480 | PL_op_name[optype])); | |
fd0854ff DM |
481 | #ifdef DEBUG_LEAKING_SCALARS |
482 | sv->sv_debug_optype = optype; | |
483 | sv->sv_debug_inpad = 1; | |
fd0854ff | 484 | #endif |
a212c8b5 | 485 | return (PADOFFSET)retval; |
dd2155a4 DM |
486 | } |
487 | ||
488 | /* | |
489 | =for apidoc pad_add_anon | |
490 | ||
491 | Add an anon code entry to the current compiling pad | |
492 | ||
493 | =cut | |
494 | */ | |
495 | ||
496 | PADOFFSET | |
497 | Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type) | |
498 | { | |
97aff369 | 499 | dVAR; |
dd2155a4 | 500 | PADOFFSET ix; |
b9f83d2f | 501 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
502 | |
503 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
504 | ||
1dba731d | 505 | pad_peg("add_anon"); |
76f68e9b | 506 | sv_setpvs(name, "&"); |
809abb02 NC |
507 | /* Are these two actually ever read? */ |
508 | COP_SEQ_RANGE_HIGH_set(name, ~0); | |
509 | COP_SEQ_RANGE_LOW_set(name, 1); | |
dd2155a4 DM |
510 | ix = pad_alloc(op_type, SVs_PADMY); |
511 | av_store(PL_comppad_name, ix, name); | |
f3548bdc | 512 | /* XXX DAPM use PL_curpad[] ? */ |
dd2155a4 DM |
513 | av_store(PL_comppad, ix, sv); |
514 | SvPADMY_on(sv); | |
7dafbf52 DM |
515 | |
516 | /* to avoid ref loops, we never have parent + child referencing each | |
517 | * other simultaneously */ | |
ea726b52 NC |
518 | if (CvOUTSIDE((const CV *)sv)) { |
519 | assert(!CvWEAKOUTSIDE((const CV *)sv)); | |
520 | CvWEAKOUTSIDE_on(MUTABLE_CV(sv)); | |
521 | SvREFCNT_dec(CvOUTSIDE(MUTABLE_CV(sv))); | |
7dafbf52 | 522 | } |
dd2155a4 DM |
523 | return ix; |
524 | } | |
525 | ||
526 | ||
527 | ||
528 | /* | |
529 | =for apidoc pad_check_dup | |
530 | ||
531 | Check for duplicate declarations: report any of: | |
532 | * a my in the current scope with the same name; | |
533 | * an our (anywhere in the pad) with the same name and the same stash | |
534 | as C<ourstash> | |
535 | C<is_our> indicates that the name to check is an 'our' declaration | |
536 | ||
537 | =cut | |
538 | */ | |
539 | ||
540 | /* XXX DAPM integrate this into pad_add_name ??? */ | |
541 | ||
542 | void | |
e1ec3a88 | 543 | Perl_pad_check_dup(pTHX_ const char *name, bool is_our, const HV *ourstash) |
dd2155a4 | 544 | { |
97aff369 | 545 | dVAR; |
53c1dcc0 | 546 | SV **svp; |
dd2155a4 DM |
547 | PADOFFSET top, off; |
548 | ||
7918f24d NC |
549 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
550 | ||
f3548bdc | 551 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
041457d9 | 552 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
553 | return; /* nothing to check */ |
554 | ||
555 | svp = AvARRAY(PL_comppad_name); | |
556 | top = AvFILLp(PL_comppad_name); | |
557 | /* check the current scope */ | |
558 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
559 | * type ? */ | |
560 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
561 | SV * const sv = svp[off]; |
562 | if (sv | |
dd2155a4 | 563 | && sv != &PL_sv_undef |
ee6cee0c | 564 | && !SvFAKE(sv) |
809abb02 | 565 | && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0) |
b15aece3 | 566 | && strEQ(name, SvPVX_const(sv))) |
dd2155a4 | 567 | { |
00b1698f | 568 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 569 | break; /* "our" masking "our" */ |
dd2155a4 DM |
570 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
571 | "\"%s\" variable %s masks earlier declaration in same %s", | |
12bd6ede | 572 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
dd2155a4 | 573 | name, |
809abb02 | 574 | (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX ? "scope" : "statement")); |
dd2155a4 DM |
575 | --off; |
576 | break; | |
577 | } | |
578 | } | |
579 | /* check the rest of the pad */ | |
580 | if (is_our) { | |
581 | do { | |
53c1dcc0 AL |
582 | SV * const sv = svp[off]; |
583 | if (sv | |
dd2155a4 | 584 | && sv != &PL_sv_undef |
ee6cee0c | 585 | && !SvFAKE(sv) |
809abb02 | 586 | && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0) |
73d95100 | 587 | && SvOURSTASH(sv) == ourstash |
b15aece3 | 588 | && strEQ(name, SvPVX_const(sv))) |
dd2155a4 DM |
589 | { |
590 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
591 | "\"our\" variable %s redeclared", name); | |
624f69f5 | 592 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
593 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
594 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
595 | break; |
596 | } | |
597 | } while ( off-- > 0 ); | |
598 | } | |
599 | } | |
600 | ||
601 | ||
dd2155a4 DM |
602 | /* |
603 | =for apidoc pad_findmy | |
604 | ||
605 | Given a lexical name, try to find its offset, first in the current pad, | |
606 | or failing that, in the pads of any lexically enclosing subs (including | |
607 | the complications introduced by eval). If the name is found in an outer pad, | |
608 | then a fake entry is added to the current pad. | |
609 | Returns the offset in the current pad, or NOT_IN_PAD on failure. | |
610 | ||
611 | =cut | |
612 | */ | |
613 | ||
614 | PADOFFSET | |
e1ec3a88 | 615 | Perl_pad_findmy(pTHX_ const char *name) |
dd2155a4 | 616 | { |
97aff369 | 617 | dVAR; |
b5c19bd7 DM |
618 | SV *out_sv; |
619 | int out_flags; | |
929a0744 | 620 | I32 offset; |
e1ec3a88 | 621 | const AV *nameav; |
929a0744 | 622 | SV **name_svp; |
dd2155a4 | 623 | |
7918f24d NC |
624 | PERL_ARGS_ASSERT_PAD_FINDMY; |
625 | ||
1dba731d | 626 | pad_peg("pad_findmy"); |
9f7d9405 | 627 | offset = pad_findlex(name, PL_compcv, PL_cop_seqmax, 1, |
4608196e | 628 | NULL, &out_sv, &out_flags); |
9f7d9405 | 629 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
630 | return offset; |
631 | ||
632 | /* look for an our that's being introduced; this allows | |
633 | * our $foo = 0 unless defined $foo; | |
634 | * to not give a warning. (Yes, this is a hack) */ | |
635 | ||
502c6561 | 636 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 DM |
637 | name_svp = AvARRAY(nameav); |
638 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 639 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
640 | if (namesv && namesv != &PL_sv_undef |
641 | && !SvFAKE(namesv) | |
00b1698f | 642 | && (SvPAD_OUR(namesv)) |
b15aece3 | 643 | && strEQ(SvPVX_const(namesv), name) |
809abb02 | 644 | && COP_SEQ_RANGE_LOW(namesv) == PAD_MAX /* min */ |
929a0744 DM |
645 | ) |
646 | return offset; | |
647 | } | |
648 | return NOT_IN_PAD; | |
dd2155a4 DM |
649 | } |
650 | ||
e1f795dc RGS |
651 | /* |
652 | * Returns the offset of a lexical $_, if there is one, at run time. | |
653 | * Used by the UNDERBAR XS macro. | |
654 | */ | |
655 | ||
656 | PADOFFSET | |
29289021 | 657 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 658 | { |
97aff369 | 659 | dVAR; |
e1f795dc RGS |
660 | SV *out_sv; |
661 | int out_flags; | |
662 | return pad_findlex("$_", find_runcv(NULL), PL_curcop->cop_seq, 1, | |
4608196e | 663 | NULL, &out_sv, &out_flags); |
e1f795dc | 664 | } |
dd2155a4 | 665 | |
dd2155a4 DM |
666 | /* |
667 | =for apidoc pad_findlex | |
668 | ||
669 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
670 | in the inner pads if it's found in an outer one. |
671 | ||
672 | Returns the offset in the bottom pad of the lex or the fake lex. | |
673 | cv is the CV in which to start the search, and seq is the current cop_seq | |
674 | to match against. If warn is true, print appropriate warnings. The out_* | |
675 | vars return values, and so are pointers to where the returned values | |
676 | should be stored. out_capture, if non-null, requests that the innermost | |
677 | instance of the lexical is captured; out_name_sv is set to the innermost | |
678 | matched namesv or fake namesv; out_flags returns the flags normally | |
679 | associated with the IVX field of a fake namesv. | |
680 | ||
681 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
682 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 683 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 684 | the parent pad. |
dd2155a4 DM |
685 | |
686 | =cut | |
687 | */ | |
688 | ||
b5c19bd7 DM |
689 | /* the CV has finished being compiled. This is not a sufficient test for |
690 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
691 | #define CvCOMPILED(cv) CvROOT(cv) | |
692 | ||
71f882da DM |
693 | /* the CV does late binding of its lexicals */ |
694 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
695 | ||
b5c19bd7 | 696 | |
dd2155a4 | 697 | STATIC PADOFFSET |
e1ec3a88 | 698 | S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn, |
b5c19bd7 | 699 | SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 700 | { |
97aff369 | 701 | dVAR; |
b5c19bd7 DM |
702 | I32 offset, new_offset; |
703 | SV *new_capture; | |
704 | SV **new_capturep; | |
b64e5050 | 705 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 706 | |
7918f24d NC |
707 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
708 | ||
b5c19bd7 | 709 | *out_flags = 0; |
a3985cdc | 710 | |
b5c19bd7 DM |
711 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
712 | "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n", | |
713 | PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" )); | |
dd2155a4 | 714 | |
b5c19bd7 | 715 | /* first, search this pad */ |
dd2155a4 | 716 | |
b5c19bd7 DM |
717 | if (padlist) { /* not an undef CV */ |
718 | I32 fake_offset = 0; | |
502c6561 | 719 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 | 720 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c | 721 | |
b5c19bd7 | 722 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 723 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 724 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 725 | && strEQ(SvPVX_const(namesv), name)) |
b5c19bd7 DM |
726 | { |
727 | if (SvFAKE(namesv)) | |
728 | fake_offset = offset; /* in case we don't find a real one */ | |
809abb02 NC |
729 | else if ( seq > COP_SEQ_RANGE_LOW(namesv) /* min */ |
730 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) /* max */ | |
b5c19bd7 | 731 | break; |
ee6cee0c DM |
732 | } |
733 | } | |
734 | ||
b5c19bd7 DM |
735 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
736 | if (offset > 0) { /* not fake */ | |
737 | fake_offset = 0; | |
738 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
739 | ||
740 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
741 | * instances. For now, we just test !CvUNIQUE(cv), but | |
742 | * ideally, we should detect my's declared within loops | |
743 | * etc - this would allow a wider range of 'not stayed | |
744 | * shared' warnings. We also treated alreadly-compiled | |
745 | * lexes as not multi as viewed from evals. */ | |
746 | ||
747 | *out_flags = CvANON(cv) ? | |
748 | PAD_FAKELEX_ANON : | |
749 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
750 | ? PAD_FAKELEX_MULTI : 0; | |
751 | ||
752 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
753 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
754 | PTR2UV(cv), (long)offset, | |
755 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
756 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
757 | } |
758 | else { /* fake match */ | |
759 | offset = fake_offset; | |
760 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 761 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 762 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 763 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 764 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 765 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
766 | )); |
767 | } | |
dd2155a4 | 768 | |
b5c19bd7 | 769 | /* return the lex? */ |
dd2155a4 | 770 | |
b5c19bd7 | 771 | if (out_capture) { |
dd2155a4 | 772 | |
b5c19bd7 | 773 | /* our ? */ |
00b1698f | 774 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 775 | *out_capture = NULL; |
b5c19bd7 DM |
776 | return offset; |
777 | } | |
ee6cee0c | 778 | |
b5c19bd7 DM |
779 | /* trying to capture from an anon prototype? */ |
780 | if (CvCOMPILED(cv) | |
781 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
782 | : *out_flags & PAD_FAKELEX_ANON) | |
783 | { | |
784 | if (warn && ckWARN(WARN_CLOSURE)) | |
785 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
786 | "Variable \"%s\" is not available", name); | |
a0714e2c | 787 | *out_capture = NULL; |
b5c19bd7 | 788 | } |
ee6cee0c | 789 | |
b5c19bd7 DM |
790 | /* real value */ |
791 | else { | |
792 | int newwarn = warn; | |
793 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 794 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
795 | && warn && ckWARN(WARN_CLOSURE)) { |
796 | newwarn = 0; | |
797 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
798 | "Variable \"%s\" will not stay shared", name); | |
799 | } | |
dd2155a4 | 800 | |
b5c19bd7 DM |
801 | if (fake_offset && CvANON(cv) |
802 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
803 | { | |
804 | SV *n; | |
805 | /* not yet caught - look further up */ | |
806 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
807 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
808 | PTR2UV(cv))); | |
809 | n = *out_name_sv; | |
282e1742 DM |
810 | (void) pad_findlex(name, CvOUTSIDE(cv), |
811 | CvOUTSIDE_SEQ(cv), | |
b5c19bd7 DM |
812 | newwarn, out_capture, out_name_sv, out_flags); |
813 | *out_name_sv = n; | |
814 | return offset; | |
dd2155a4 | 815 | } |
b5c19bd7 | 816 | |
502c6561 NC |
817 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
818 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; | |
b5c19bd7 DM |
819 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
820 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 821 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 822 | |
d1186544 DM |
823 | if (SvPADSTALE(*out_capture) |
824 | && !SvPAD_STATE(name_svp[offset])) | |
825 | { | |
b5c19bd7 | 826 | if (ckWARN(WARN_CLOSURE)) |
ee6cee0c | 827 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
b5c19bd7 | 828 | "Variable \"%s\" is not available", name); |
a0714e2c | 829 | *out_capture = NULL; |
dd2155a4 DM |
830 | } |
831 | } | |
b5c19bd7 DM |
832 | if (!*out_capture) { |
833 | if (*name == '@') | |
ad64d0ec | 834 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
b5c19bd7 | 835 | else if (*name == '%') |
ad64d0ec | 836 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 DM |
837 | else |
838 | *out_capture = sv_newmortal(); | |
839 | } | |
dd2155a4 | 840 | } |
b5c19bd7 DM |
841 | |
842 | return offset; | |
ee6cee0c | 843 | } |
b5c19bd7 DM |
844 | } |
845 | ||
846 | /* it's not in this pad - try above */ | |
847 | ||
848 | if (!CvOUTSIDE(cv)) | |
849 | return NOT_IN_PAD; | |
9f7d9405 | 850 | |
b5c19bd7 | 851 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 852 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 853 | new_capturep = out_capture ? out_capture : |
4608196e | 854 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 DM |
855 | |
856 | offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
857 | new_capturep, out_name_sv, out_flags); | |
9f7d9405 | 858 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 859 | return NOT_IN_PAD; |
9f7d9405 | 860 | |
b5c19bd7 DM |
861 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
862 | ||
863 | /* don't add new fake entries (via eval) to CVs that we have already | |
864 | * finished compiling, or to undef CVs */ | |
865 | if (CvCOMPILED(cv) || !padlist) | |
866 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
867 | ||
868 | { | |
869 | SV *new_namesv; | |
53c1dcc0 AL |
870 | AV * const ocomppad_name = PL_comppad_name; |
871 | PAD * const ocomppad = PL_comppad; | |
502c6561 NC |
872 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
873 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
b5c19bd7 DM |
874 | PL_curpad = AvARRAY(PL_comppad); |
875 | ||
876 | new_offset = pad_add_name( | |
b15aece3 | 877 | SvPVX_const(*out_name_sv), |
00b1698f | 878 | SvPAD_TYPED(*out_name_sv) |
5c284bb0 | 879 | ? SvSTASH(*out_name_sv) : NULL, |
73d95100 | 880 | SvOURSTASH(*out_name_sv), |
952306ac | 881 | 1, /* fake */ |
d1186544 | 882 | SvPAD_STATE(*out_name_sv) ? 1 : 0 /* state variable ? */ |
b5c19bd7 DM |
883 | ); |
884 | ||
885 | new_namesv = AvARRAY(PL_comppad_name)[new_offset]; | |
809abb02 | 886 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 887 | |
809abb02 | 888 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 889 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 890 | NOOP; /* do nothing */ |
b5c19bd7 | 891 | } |
71f882da | 892 | else if (CvLATE(cv)) { |
b5c19bd7 | 893 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 894 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
895 | CvCLONE_on(cv); |
896 | } | |
897 | else { | |
898 | /* immediate creation - capture outer value right now */ | |
899 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
900 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
901 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
902 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 903 | } |
b5c19bd7 | 904 | *out_name_sv = new_namesv; |
809abb02 | 905 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
906 | |
907 | PL_comppad_name = ocomppad_name; | |
908 | PL_comppad = ocomppad; | |
4608196e | 909 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 910 | } |
b5c19bd7 | 911 | return new_offset; |
dd2155a4 DM |
912 | } |
913 | ||
fb8a9836 AL |
914 | |
915 | #ifdef DEBUGGING | |
dd2155a4 DM |
916 | /* |
917 | =for apidoc pad_sv | |
918 | ||
919 | Get the value at offset po in the current pad. | |
920 | Use macro PAD_SV instead of calling this function directly. | |
921 | ||
922 | =cut | |
923 | */ | |
924 | ||
925 | ||
926 | SV * | |
927 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
928 | { | |
97aff369 | 929 | dVAR; |
f3548bdc | 930 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 931 | |
dd2155a4 DM |
932 | if (!po) |
933 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
934 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
935 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 936 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
937 | ); |
938 | return PL_curpad[po]; | |
939 | } | |
940 | ||
941 | ||
942 | /* | |
943 | =for apidoc pad_setsv | |
944 | ||
945 | Set the entry at offset po in the current pad to sv. | |
946 | Use the macro PAD_SETSV() rather than calling this function directly. | |
947 | ||
948 | =cut | |
949 | */ | |
950 | ||
dd2155a4 DM |
951 | void |
952 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
953 | { | |
97aff369 | 954 | dVAR; |
7918f24d NC |
955 | |
956 | PERL_ARGS_ASSERT_PAD_SETSV; | |
957 | ||
f3548bdc | 958 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
959 | |
960 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
961 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 962 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
963 | ); |
964 | PL_curpad[po] = sv; | |
965 | } | |
966 | #endif | |
967 | ||
968 | ||
969 | ||
970 | /* | |
971 | =for apidoc pad_block_start | |
972 | ||
973 | Update the pad compilation state variables on entry to a new block | |
974 | ||
975 | =cut | |
976 | */ | |
977 | ||
978 | /* XXX DAPM perhaps: | |
979 | * - integrate this in general state-saving routine ??? | |
980 | * - combine with the state-saving going on in pad_new ??? | |
981 | * - introduce a new SAVE type that does all this in one go ? | |
982 | */ | |
983 | ||
984 | void | |
985 | Perl_pad_block_start(pTHX_ int full) | |
986 | { | |
97aff369 | 987 | dVAR; |
f3548bdc | 988 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
989 | SAVEI32(PL_comppad_name_floor); |
990 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
991 | if (full) | |
992 | PL_comppad_name_fill = PL_comppad_name_floor; | |
993 | if (PL_comppad_name_floor < 0) | |
994 | PL_comppad_name_floor = 0; | |
995 | SAVEI32(PL_min_intro_pending); | |
996 | SAVEI32(PL_max_intro_pending); | |
997 | PL_min_intro_pending = 0; | |
998 | SAVEI32(PL_comppad_name_fill); | |
999 | SAVEI32(PL_padix_floor); | |
1000 | PL_padix_floor = PL_padix; | |
1001 | PL_pad_reset_pending = FALSE; | |
1002 | } | |
1003 | ||
1004 | ||
1005 | /* | |
1006 | =for apidoc intro_my | |
1007 | ||
1008 | "Introduce" my variables to visible status. | |
1009 | ||
1010 | =cut | |
1011 | */ | |
1012 | ||
1013 | U32 | |
1014 | Perl_intro_my(pTHX) | |
1015 | { | |
97aff369 | 1016 | dVAR; |
dd2155a4 | 1017 | SV **svp; |
dd2155a4 DM |
1018 | I32 i; |
1019 | ||
f3548bdc | 1020 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1021 | if (! PL_min_intro_pending) |
1022 | return PL_cop_seqmax; | |
1023 | ||
1024 | svp = AvARRAY(PL_comppad_name); | |
1025 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1026 | SV * const sv = svp[i]; |
1027 | ||
809abb02 NC |
1028 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && !COP_SEQ_RANGE_HIGH(sv)) { |
1029 | COP_SEQ_RANGE_HIGH_set(sv, PAD_MAX); /* Don't know scope end yet. */ | |
1030 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); | |
dd2155a4 | 1031 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1032 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1033 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1034 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1035 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1036 | ); |
1037 | } | |
1038 | } | |
1039 | PL_min_intro_pending = 0; | |
1040 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1041 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1042 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax+1))); | |
1043 | ||
1044 | return PL_cop_seqmax++; | |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | =for apidoc pad_leavemy | |
1049 | ||
1050 | Cleanup at end of scope during compilation: set the max seq number for | |
1051 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1052 | ||
1053 | =cut | |
1054 | */ | |
1055 | ||
1056 | void | |
1057 | Perl_pad_leavemy(pTHX) | |
1058 | { | |
97aff369 | 1059 | dVAR; |
dd2155a4 | 1060 | I32 off; |
551405c4 | 1061 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1062 | |
1063 | PL_pad_reset_pending = FALSE; | |
1064 | ||
f3548bdc | 1065 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1066 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1067 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 AL |
1068 | const SV * const sv = svp[off]; |
1069 | if (sv && sv != &PL_sv_undef | |
ee6cee0c | 1070 | && !SvFAKE(sv) && ckWARN_d(WARN_INTERNAL)) |
dd2155a4 | 1071 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
95b63a38 | 1072 | "%"SVf" never introduced", |
be2597df | 1073 | SVfARG(sv)); |
dd2155a4 DM |
1074 | } |
1075 | } | |
1076 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1077 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1078 | const SV * const sv = svp[off]; |
809abb02 NC |
1079 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && COP_SEQ_RANGE_HIGH(sv) == PAD_MAX) { |
1080 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); | |
dd2155a4 | 1081 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1082 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1083 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1084 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1085 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1086 | ); |
1087 | } | |
1088 | } | |
1089 | PL_cop_seqmax++; | |
1090 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1091 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1092 | } | |
1093 | ||
1094 | ||
1095 | /* | |
1096 | =for apidoc pad_swipe | |
1097 | ||
1098 | Abandon the tmp in the current pad at offset po and replace with a | |
1099 | new one. | |
1100 | ||
1101 | =cut | |
1102 | */ | |
1103 | ||
1104 | void | |
1105 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1106 | { | |
97aff369 | 1107 | dVAR; |
f3548bdc | 1108 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1109 | if (!PL_curpad) |
1110 | return; | |
1111 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1112 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1113 | if (!po) | |
1114 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1115 | ||
1116 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1117 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1118 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1119 | ||
1120 | if (PL_curpad[po]) | |
1121 | SvPADTMP_off(PL_curpad[po]); | |
1122 | if (refadjust) | |
1123 | SvREFCNT_dec(PL_curpad[po]); | |
1124 | ||
9ad9869c DM |
1125 | |
1126 | /* if pad tmps aren't shared between ops, then there's no need to | |
1127 | * create a new tmp when an existing op is freed */ | |
1128 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1129 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1130 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1131 | #else |
1132 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1133 | #endif |
dd2155a4 DM |
1134 | if ((I32)po < PL_padix) |
1135 | PL_padix = po - 1; | |
1136 | } | |
1137 | ||
1138 | ||
1139 | /* | |
1140 | =for apidoc pad_reset | |
1141 | ||
1142 | Mark all the current temporaries for reuse | |
1143 | ||
1144 | =cut | |
1145 | */ | |
1146 | ||
1147 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1148 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1149 | * on the stack by OPs that use them, there are several ways to get an alias | |
1150 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1151 | * We avoid doing this until we can think of a Better Way. | |
1152 | * GSAR 97-10-29 */ | |
1f676739 | 1153 | static void |
82af08ae | 1154 | S_pad_reset(pTHX) |
dd2155a4 | 1155 | { |
97aff369 | 1156 | dVAR; |
dd2155a4 | 1157 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 DM |
1158 | if (AvARRAY(PL_comppad) != PL_curpad) |
1159 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1160 | ||
1161 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1162 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1163 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1164 | (long)PL_padix, (long)PL_padix_floor | |
1165 | ) | |
1166 | ); | |
1167 | ||
1168 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1169 | register I32 po; |
dd2155a4 DM |
1170 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1171 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1172 | SvPADTMP_off(PL_curpad[po]); | |
1173 | } | |
1174 | PL_padix = PL_padix_floor; | |
1175 | } | |
1176 | #endif | |
1177 | PL_pad_reset_pending = FALSE; | |
1178 | } | |
1179 | ||
1180 | ||
1181 | /* | |
1182 | =for apidoc pad_tidy | |
1183 | ||
1184 | Tidy up a pad after we've finished compiling it: | |
1185 | * remove most stuff from the pads of anonsub prototypes; | |
1186 | * give it a @_; | |
1187 | * mark tmps as such. | |
1188 | ||
1189 | =cut | |
1190 | */ | |
1191 | ||
1192 | /* XXX DAPM surely most of this stuff should be done properly | |
1193 | * at the right time beforehand, rather than going around afterwards | |
1194 | * cleaning up our mistakes ??? | |
1195 | */ | |
1196 | ||
1197 | void | |
1198 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1199 | { | |
27da23d5 | 1200 | dVAR; |
dd2155a4 | 1201 | |
f3548bdc | 1202 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1203 | |
1204 | /* If this CV has had any 'eval-capable' ops planted in it | |
1205 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1206 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1207 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1208 | * the right CvOUTSIDE. | |
1209 | * If running with -d, *any* sub may potentially have an eval | |
1210 | * excuted within it. | |
1211 | */ | |
1212 | ||
1213 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1214 | const CV *cv; |
b5c19bd7 DM |
1215 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1216 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1217 | break; /* no need to mark already-compiled code */ | |
1218 | if (CvANON(cv)) { | |
1219 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1220 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1221 | CvCLONE_on(cv); | |
1222 | } | |
1223 | } | |
1224 | } | |
1225 | ||
dd2155a4 DM |
1226 | /* extend curpad to match namepad */ |
1227 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1228 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1229 | |
1230 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1231 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1232 | PADOFFSET ix; |
b5c19bd7 | 1233 | |
dd2155a4 DM |
1234 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1235 | SV *namesv; | |
1236 | ||
1237 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1238 | continue; | |
1239 | /* | |
1240 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1241 | * pad are anonymous subs. |
dd2155a4 DM |
1242 | * The rest are created anew during cloning. |
1243 | */ | |
a0714e2c | 1244 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1245 | namesv != &PL_sv_undef && |
b15aece3 | 1246 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1247 | { |
1248 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1249 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1250 | } |
1251 | } | |
1252 | } | |
1253 | else if (type == padtidy_SUB) { | |
1254 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1255 | AV * const av = newAV(); /* Will be @_ */ |
dd2155a4 | 1256 | av_extend(av, 0); |
ad64d0ec | 1257 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1258 | AvREIFY_only(av); |
dd2155a4 DM |
1259 | } |
1260 | ||
1261 | /* XXX DAPM rationalise these two similar branches */ | |
1262 | ||
1263 | if (type == padtidy_SUB) { | |
504618e9 | 1264 | PADOFFSET ix; |
dd2155a4 DM |
1265 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1266 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1267 | continue; | |
1268 | if (!SvPADMY(PL_curpad[ix])) | |
1269 | SvPADTMP_on(PL_curpad[ix]); | |
1270 | } | |
1271 | } | |
1272 | else if (type == padtidy_FORMAT) { | |
504618e9 | 1273 | PADOFFSET ix; |
dd2155a4 DM |
1274 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1275 | if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix])) | |
1276 | SvPADTMP_on(PL_curpad[ix]); | |
1277 | } | |
1278 | } | |
f3548bdc | 1279 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1280 | } |
1281 | ||
1282 | ||
1283 | /* | |
1284 | =for apidoc pad_free | |
1285 | ||
8627550a | 1286 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1287 | |
1288 | =cut | |
1289 | */ | |
1290 | ||
1291 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1292 | void | |
1293 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1294 | { | |
97aff369 | 1295 | dVAR; |
f3548bdc | 1296 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1297 | if (!PL_curpad) |
1298 | return; | |
1299 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1300 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1301 | if (!po) | |
1302 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1303 | ||
1304 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1305 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1306 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1307 | ); | |
1308 | ||
1309 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1310 | SvPADTMP_off(PL_curpad[po]); | |
1311 | #ifdef USE_ITHREADS | |
7e736055 | 1312 | /* SV could be a shared hash key (eg bugid #19022) */ |
ddea3ea7 | 1313 | if (!SvIsCOW(PL_curpad[po])) |
dd2155a4 | 1314 | SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */ |
dd2155a4 DM |
1315 | #endif |
1316 | } | |
1317 | if ((I32)po < PL_padix) | |
1318 | PL_padix = po - 1; | |
1319 | } | |
1320 | ||
1321 | ||
1322 | ||
1323 | /* | |
1324 | =for apidoc do_dump_pad | |
1325 | ||
1326 | Dump the contents of a padlist | |
1327 | ||
1328 | =cut | |
1329 | */ | |
1330 | ||
1331 | void | |
1332 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1333 | { | |
97aff369 | 1334 | dVAR; |
e1ec3a88 AL |
1335 | const AV *pad_name; |
1336 | const AV *pad; | |
dd2155a4 DM |
1337 | SV **pname; |
1338 | SV **ppad; | |
dd2155a4 DM |
1339 | I32 ix; |
1340 | ||
7918f24d NC |
1341 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1342 | ||
dd2155a4 DM |
1343 | if (!padlist) { |
1344 | return; | |
1345 | } | |
502c6561 NC |
1346 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1347 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); | |
dd2155a4 DM |
1348 | pname = AvARRAY(pad_name); |
1349 | ppad = AvARRAY(pad); | |
1350 | Perl_dump_indent(aTHX_ level, file, | |
1351 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1352 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1353 | ); | |
1354 | ||
1355 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1356 | const SV *namesv = pname[ix]; |
dd2155a4 | 1357 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1358 | namesv = NULL; |
dd2155a4 DM |
1359 | } |
1360 | if (namesv) { | |
ee6cee0c DM |
1361 | if (SvFAKE(namesv)) |
1362 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1363 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1364 | (int) ix, |
1365 | PTR2UV(ppad[ix]), | |
1366 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1367 | SvPVX_const(namesv), |
809abb02 NC |
1368 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1369 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1370 | |
ee6cee0c DM |
1371 | ); |
1372 | else | |
1373 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1374 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1375 | (int) ix, |
1376 | PTR2UV(ppad[ix]), | |
1377 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1378 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1379 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1380 | SvPVX_const(namesv) |
ee6cee0c | 1381 | ); |
dd2155a4 DM |
1382 | } |
1383 | else if (full) { | |
1384 | Perl_dump_indent(aTHX_ level+1, file, | |
1385 | "%2d. 0x%"UVxf"<%lu>\n", | |
1386 | (int) ix, | |
1387 | PTR2UV(ppad[ix]), | |
1388 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1389 | ); | |
1390 | } | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | ||
1395 | ||
1396 | /* | |
1397 | =for apidoc cv_dump | |
1398 | ||
1399 | dump the contents of a CV | |
1400 | ||
1401 | =cut | |
1402 | */ | |
1403 | ||
1404 | #ifdef DEBUGGING | |
1405 | STATIC void | |
e1ec3a88 | 1406 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1407 | { |
97aff369 | 1408 | dVAR; |
53c1dcc0 AL |
1409 | const CV * const outside = CvOUTSIDE(cv); |
1410 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1411 | |
7918f24d NC |
1412 | PERL_ARGS_ASSERT_CV_DUMP; |
1413 | ||
dd2155a4 DM |
1414 | PerlIO_printf(Perl_debug_log, |
1415 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1416 | title, | |
1417 | PTR2UV(cv), | |
1418 | (CvANON(cv) ? "ANON" | |
71f882da | 1419 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1420 | : (cv == PL_main_cv) ? "MAIN" |
1421 | : CvUNIQUE(cv) ? "UNIQUE" | |
1422 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1423 | PTR2UV(outside), | |
1424 | (!outside ? "null" | |
1425 | : CvANON(outside) ? "ANON" | |
1426 | : (outside == PL_main_cv) ? "MAIN" | |
1427 | : CvUNIQUE(outside) ? "UNIQUE" | |
1428 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1429 | ||
1430 | PerlIO_printf(Perl_debug_log, | |
1431 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1432 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1433 | } | |
1434 | #endif /* DEBUGGING */ | |
1435 | ||
1436 | ||
1437 | ||
1438 | ||
1439 | ||
1440 | /* | |
1441 | =for apidoc cv_clone | |
1442 | ||
1443 | Clone a CV: make a new CV which points to the same code etc, but which | |
1444 | has a newly-created pad built by copying the prototype pad and capturing | |
1445 | any outer lexicals. | |
1446 | ||
1447 | =cut | |
1448 | */ | |
1449 | ||
1450 | CV * | |
1451 | Perl_cv_clone(pTHX_ CV *proto) | |
1452 | { | |
27da23d5 | 1453 | dVAR; |
dd2155a4 | 1454 | I32 ix; |
53c1dcc0 | 1455 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 NC |
1456 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1457 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); | |
53c1dcc0 AL |
1458 | SV** const pname = AvARRAY(protopad_name); |
1459 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1460 | const I32 fname = AvFILLp(protopad_name); |
1461 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1462 | CV* cv; |
b5c19bd7 DM |
1463 | SV** outpad; |
1464 | CV* outside; | |
71f882da | 1465 | long depth; |
dd2155a4 | 1466 | |
7918f24d NC |
1467 | PERL_ARGS_ASSERT_CV_CLONE; |
1468 | ||
dd2155a4 DM |
1469 | assert(!CvUNIQUE(proto)); |
1470 | ||
71f882da DM |
1471 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1472 | * to a prototype; we instead want the cloned parent who called us. | |
1473 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1474 | ||
1475 | outside = CvOUTSIDE(proto); | |
1476 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1477 | outside = find_runcv(NULL); | |
1478 | depth = CvDEPTH(outside); | |
1479 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1480 | if (!depth) | |
1481 | depth = 1; | |
b5c19bd7 DM |
1482 | assert(CvPADLIST(outside)); |
1483 | ||
dd2155a4 DM |
1484 | ENTER; |
1485 | SAVESPTR(PL_compcv); | |
1486 | ||
ea726b52 | 1487 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
7dafbf52 | 1488 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE); |
dd2155a4 DM |
1489 | CvCLONED_on(cv); |
1490 | ||
dd2155a4 | 1491 | #ifdef USE_ITHREADS |
aed2304a NC |
1492 | CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto) |
1493 | : savepv(CvFILE(proto)); | |
dd2155a4 DM |
1494 | #else |
1495 | CvFILE(cv) = CvFILE(proto); | |
1496 | #endif | |
1497 | CvGV(cv) = CvGV(proto); | |
1498 | CvSTASH(cv) = CvSTASH(proto); | |
b34c0dd4 | 1499 | OP_REFCNT_LOCK; |
dd2155a4 | 1500 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1501 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1502 | CvSTART(cv) = CvSTART(proto); |
ea726b52 | 1503 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
b5c19bd7 | 1504 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1505 | |
1506 | if (SvPOK(proto)) | |
ad64d0ec | 1507 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 | 1508 | |
b7787f18 | 1509 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1510 | |
b5c19bd7 | 1511 | av_fill(PL_comppad, fpad); |
dd2155a4 DM |
1512 | for (ix = fname; ix >= 0; ix--) |
1513 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); | |
1514 | ||
dd2155a4 DM |
1515 | PL_curpad = AvARRAY(PL_comppad); |
1516 | ||
71f882da | 1517 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1518 | |
dd2155a4 | 1519 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1520 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1521 | SV *sv = NULL; | |
71f882da | 1522 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1523 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 | 1524 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da | 1525 | assert(sv); |
33894c1a DM |
1526 | /* formats may have an inactive parent, |
1527 | while my $x if $false can leave an active var marked as | |
d1186544 DM |
1528 | stale. And state vars are always available */ |
1529 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { | |
71f882da DM |
1530 | if (ckWARN(WARN_CLOSURE)) |
1531 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
b15aece3 | 1532 | "Variable \"%s\" is not available", SvPVX_const(namesv)); |
a0714e2c | 1533 | sv = NULL; |
71f882da | 1534 | } |
33894c1a | 1535 | else |
f84c484e | 1536 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1537 | } |
71f882da | 1538 | if (!sv) { |
b15aece3 | 1539 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 1540 | if (sigil == '&') |
dd2155a4 | 1541 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 1542 | else if (sigil == '@') |
ad64d0ec | 1543 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 | 1544 | else if (sigil == '%') |
ad64d0ec | 1545 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1546 | else |
561b68a9 | 1547 | sv = newSV(0); |
235cc2e3 | 1548 | SvPADMY_on(sv); |
0d3b281c DM |
1549 | /* reset the 'assign only once' flag on each state var */ |
1550 | if (SvPAD_STATE(namesv)) | |
1551 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
1552 | } |
1553 | } | |
1554 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 1555 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
1556 | } |
1557 | else { | |
561b68a9 | 1558 | sv = newSV(0); |
dd2155a4 | 1559 | SvPADTMP_on(sv); |
dd2155a4 | 1560 | } |
71f882da | 1561 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1562 | } |
1563 | ||
dd2155a4 DM |
1564 | DEBUG_Xv( |
1565 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1566 | cv_dump(outside, "Outside"); | |
1567 | cv_dump(proto, "Proto"); | |
1568 | cv_dump(cv, "To"); | |
1569 | ); | |
1570 | ||
1571 | LEAVE; | |
1572 | ||
1573 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1574 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1575 | * The prototype was marked as a candiate for const-ization, | |
1576 | * so try to grab the current const value, and if successful, | |
1577 | * turn into a const sub: | |
1578 | */ | |
551405c4 | 1579 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1580 | if (const_sv) { |
1581 | SvREFCNT_dec(cv); | |
bd61b366 | 1582 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
1583 | } |
1584 | else { | |
1585 | CvCONST_off(cv); | |
1586 | } | |
dd2155a4 DM |
1587 | } |
1588 | ||
1589 | return cv; | |
1590 | } | |
1591 | ||
1592 | ||
1593 | /* | |
1594 | =for apidoc pad_fixup_inner_anons | |
1595 | ||
1596 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1597 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1598 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1599 | |
1600 | =cut | |
1601 | */ | |
1602 | ||
1603 | void | |
1604 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1605 | { | |
97aff369 | 1606 | dVAR; |
dd2155a4 | 1607 | I32 ix; |
502c6561 NC |
1608 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1609 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); | |
53c1dcc0 AL |
1610 | SV ** const namepad = AvARRAY(comppad_name); |
1611 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
1612 | |
1613 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
1614 | PERL_UNUSED_ARG(old_cv); |
1615 | ||
dd2155a4 | 1616 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 1617 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 1618 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 1619 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 1620 | { |
ea726b52 | 1621 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 DM |
1622 | assert(CvWEAKOUTSIDE(innercv)); |
1623 | assert(CvOUTSIDE(innercv) == old_cv); | |
1624 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
1625 | } |
1626 | } | |
1627 | } | |
1628 | ||
7dafbf52 | 1629 | |
dd2155a4 DM |
1630 | /* |
1631 | =for apidoc pad_push | |
1632 | ||
1633 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
1634 | this depth, in which case don't bother creating a new one. Then give |
1635 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
1636 | |
1637 | =cut | |
1638 | */ | |
1639 | ||
1640 | void | |
26019298 | 1641 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 1642 | { |
97aff369 | 1643 | dVAR; |
7918f24d NC |
1644 | |
1645 | PERL_ARGS_ASSERT_PAD_PUSH; | |
1646 | ||
b37c2d43 | 1647 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
1648 | SV** const svp = AvARRAY(padlist); |
1649 | AV* const newpad = newAV(); | |
1650 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
502c6561 NC |
1651 | I32 ix = AvFILLp((const AV *)svp[1]); |
1652 | const I32 names_fill = AvFILLp((const AV *)svp[0]); | |
44f8325f | 1653 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
1654 | AV *av; |
1655 | ||
dd2155a4 DM |
1656 | for ( ;ix > 0; ix--) { |
1657 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 1658 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
1659 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
1660 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
1661 | || sigil == '&') | |
1662 | { | |
dd2155a4 DM |
1663 | /* outer lexical or anon code */ |
1664 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
1665 | } | |
1666 | else { /* our own lexical */ | |
26019298 AL |
1667 | SV *sv; |
1668 | if (sigil == '@') | |
ad64d0ec | 1669 | sv = MUTABLE_SV(newAV()); |
26019298 | 1670 | else if (sigil == '%') |
ad64d0ec | 1671 | sv = MUTABLE_SV(newHV()); |
dd2155a4 | 1672 | else |
561b68a9 | 1673 | sv = newSV(0); |
26019298 | 1674 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1675 | SvPADMY_on(sv); |
1676 | } | |
1677 | } | |
1678 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 1679 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
1680 | } |
1681 | else { | |
1682 | /* save temporaries on recursion? */ | |
561b68a9 | 1683 | SV * const sv = newSV(0); |
26019298 | 1684 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1685 | SvPADTMP_on(sv); |
1686 | } | |
1687 | } | |
26019298 AL |
1688 | av = newAV(); |
1689 | av_extend(av, 0); | |
ad64d0ec | 1690 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 | 1691 | AvREIFY_only(av); |
26019298 | 1692 | |
ad64d0ec | 1693 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 DM |
1694 | AvFILLp(padlist) = depth; |
1695 | } | |
1696 | } | |
b21dc031 AL |
1697 | |
1698 | ||
1699 | HV * | |
1700 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
1701 | { | |
97aff369 | 1702 | dVAR; |
551405c4 | 1703 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 1704 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
1705 | return SvSTASH(*av); |
1706 | } | |
5c284bb0 | 1707 | return NULL; |
b21dc031 | 1708 | } |
66610fdd RGS |
1709 | |
1710 | /* | |
1711 | * Local variables: | |
1712 | * c-indentation-style: bsd | |
1713 | * c-basic-offset: 4 | |
1714 | * indent-tabs-mode: t | |
1715 | * End: | |
1716 | * | |
37442d52 RGS |
1717 | * ex: set ts=8 sts=4 sw=4 noet: |
1718 | */ |