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dd2155a4 DM |
1 | /* pad.c |
2 | * | |
fdf8c088 | 3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others |
dd2155a4 DM |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
8 | * "Anyway: there was this Mr Frodo left an orphan and stranded, as you | |
9 | * might say, among those queer Bucklanders, being brought up anyhow in | |
10 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc | |
11 | * never had fewer than a couple of hundred relations in the place. Mr | |
12 | * Bilbo never did a kinder deed than when he brought the lad back to | |
13 | * live among decent folk." --the Gaffer | |
14 | */ | |
15 | ||
16 | /* XXX DAPM | |
17 | * As of Sept 2002, this file is new and may be in a state of flux for | |
18 | * a while. I've marked things I intent to come back and look at further | |
19 | * with an 'XXX DAPM' comment. | |
20 | */ | |
21 | ||
22 | /* | |
23 | =head1 Pad Data Structures | |
24 | ||
61296642 | 25 | This file contains the functions that create and manipulate scratchpads, |
166f8a29 | 26 | which are array-of-array data structures attached to a CV (ie a sub) |
61296642 | 27 | and which store lexical variables and opcode temporary and per-thread |
166f8a29 DM |
28 | values. |
29 | ||
dd2155a4 DM |
30 | =for apidoc m|AV *|CvPADLIST|CV *cv |
31 | CV's can have CvPADLIST(cv) set to point to an AV. | |
32 | ||
33 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're | |
34 | not callable at will and are always thrown away after the eval"" is done | |
b5c19bd7 DM |
35 | executing). Require'd files are simply evals without any outer lexical |
36 | scope. | |
dd2155a4 DM |
37 | |
38 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, | |
39 | but that is really the callers pad (a slot of which is allocated by | |
40 | every entersub). | |
41 | ||
42 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items | |
f3548bdc | 43 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 DM |
44 | The items in the AV are not SVs as for a normal AV, but other AVs: |
45 | ||
46 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather | |
47 | the "static type information" for lexicals. | |
48 | ||
49 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that | |
50 | depth of recursion into the CV. | |
51 | The 0'th slot of a frame AV is an AV which is @_. | |
52 | other entries are storage for variables and op targets. | |
53 | ||
54 | During compilation: | |
a6d05634 TM |
55 | C<PL_comppad_name> is set to the names AV. |
56 | C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1. | |
57 | C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)). | |
dd2155a4 | 58 | |
f3548bdc DM |
59 | During execution, C<PL_comppad> and C<PL_curpad> refer to the live |
60 | frame of the currently executing sub. | |
61 | ||
62 | Iterating over the names AV iterates over all possible pad | |
dd2155a4 DM |
63 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
64 | &PL_sv_undef "names" (see pad_alloc()). | |
65 | ||
66 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. | |
67 | The rest are op targets/GVs/constants which are statically allocated | |
68 | or resolved at compile time. These don't have names by which they | |
69 | can be looked up from Perl code at run time through eval"" like | |
70 | my/our variables can be. Since they can't be looked up by "name" | |
71 | but only by their index allocated at compile time (which is usually | |
72 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. | |
73 | ||
74 | The SVs in the names AV have their PV being the name of the variable. | |
3441fb63 NC |
75 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
76 | which the name is valid. For typed lexicals name SV is SVt_PVMG and SvSTASH | |
77 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the | |
73d95100 | 78 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb | 79 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 | 80 | sometimes hijacked to store the generation number during compilation. |
dd2155a4 | 81 | |
b5c19bd7 DM |
82 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
83 | a REFCNT'ed reference to a lexical from "outside". In this case, | |
3441fb63 NC |
84 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
85 | in scope throughout. Instead xhigh stores some flags containing info about | |
b5c19bd7 | 86 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 | 87 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 DM |
88 | within the parent's pad where the lexical's value is stored, to make |
89 | cloning quicker. | |
dd2155a4 | 90 | |
a6d05634 | 91 | If the 'name' is '&' the corresponding entry in frame AV |
dd2155a4 DM |
92 | is a CV representing a possible closure. |
93 | (SvFAKE and name of '&' is not a meaningful combination currently but could | |
94 | become so if C<my sub foo {}> is implemented.) | |
95 | ||
71f882da DM |
96 | Note that formats are treated as anon subs, and are cloned each time |
97 | write is called (if necessary). | |
98 | ||
e6e7068b DM |
99 | The flag SVf_PADSTALE is cleared on lexicals each time the my() is executed, |
100 | and set on scope exit. This allows the 'Variable $x is not available' warning | |
101 | to be generated in evals, such as | |
102 | ||
103 | { my $x = 1; sub f { eval '$x'} } f(); | |
104 | ||
d1186544 DM |
105 | For state vars, SVf_PADSTALE is overloaded to mean 'not yet initialised' |
106 | ||
dd2155a4 DM |
107 | =cut |
108 | */ | |
109 | ||
110 | ||
111 | #include "EXTERN.h" | |
112 | #define PERL_IN_PAD_C | |
113 | #include "perl.h" | |
952306ac | 114 | #include "keywords.h" |
dd2155a4 | 115 | |
3441fb63 NC |
116 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
117 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
118 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ | |
119 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
809abb02 | 120 | |
3441fb63 NC |
121 | #define PARENT_PAD_INDEX_set(sv,val) \ |
122 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END | |
123 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ | |
124 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END | |
dd2155a4 | 125 | |
c8185ac5 | 126 | #define PAD_MAX I32_MAX |
dd2155a4 | 127 | |
1dba731d NC |
128 | #ifdef PERL_MAD |
129 | void pad_peg(const char* s) { | |
130 | static int pegcnt; | |
7918f24d NC |
131 | |
132 | PERL_ARGS_ASSERT_PAD_PEG; | |
133 | ||
1dba731d NC |
134 | pegcnt++; |
135 | } | |
136 | #endif | |
dd2155a4 DM |
137 | |
138 | /* | |
139 | =for apidoc pad_new | |
140 | ||
141 | Create a new compiling padlist, saving and updating the various global | |
142 | vars at the same time as creating the pad itself. The following flags | |
143 | can be OR'ed together: | |
144 | ||
145 | padnew_CLONE this pad is for a cloned CV | |
146 | padnew_SAVE save old globals | |
147 | padnew_SAVESUB also save extra stuff for start of sub | |
148 | ||
149 | =cut | |
150 | */ | |
151 | ||
152 | PADLIST * | |
c7c737cb | 153 | Perl_pad_new(pTHX_ int flags) |
dd2155a4 | 154 | { |
97aff369 | 155 | dVAR; |
e1ec3a88 | 156 | AV *padlist, *padname, *pad; |
dd2155a4 | 157 | |
f3548bdc DM |
158 | ASSERT_CURPAD_LEGAL("pad_new"); |
159 | ||
dd2155a4 DM |
160 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
161 | * vars (based on flags) rather than storing vals + addresses for | |
162 | * each individually. Also see pad_block_start. | |
163 | * XXX DAPM Try to see whether all these conditionals are required | |
164 | */ | |
165 | ||
166 | /* save existing state, ... */ | |
167 | ||
168 | if (flags & padnew_SAVE) { | |
3979c56f | 169 | SAVECOMPPAD(); |
dd2155a4 DM |
170 | SAVESPTR(PL_comppad_name); |
171 | if (! (flags & padnew_CLONE)) { | |
172 | SAVEI32(PL_padix); | |
173 | SAVEI32(PL_comppad_name_fill); | |
174 | SAVEI32(PL_min_intro_pending); | |
175 | SAVEI32(PL_max_intro_pending); | |
8bbe96d7 | 176 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 DM |
177 | if (flags & padnew_SAVESUB) { |
178 | SAVEI32(PL_pad_reset_pending); | |
179 | } | |
180 | } | |
181 | } | |
182 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be | |
183 | * saved - check at some pt that this is okay */ | |
184 | ||
185 | /* ... create new pad ... */ | |
186 | ||
187 | padlist = newAV(); | |
188 | padname = newAV(); | |
189 | pad = newAV(); | |
190 | ||
191 | if (flags & padnew_CLONE) { | |
192 | /* XXX DAPM I dont know why cv_clone needs it | |
193 | * doing differently yet - perhaps this separate branch can be | |
194 | * dispensed with eventually ??? | |
195 | */ | |
196 | ||
e1ec3a88 | 197 | AV * const a0 = newAV(); /* will be @_ */ |
dd2155a4 DM |
198 | av_extend(a0, 0); |
199 | av_store(pad, 0, (SV*)a0); | |
11ca45c0 | 200 | AvREIFY_only(a0); |
dd2155a4 DM |
201 | } |
202 | else { | |
a0714e2c | 203 | av_store(pad, 0, NULL); |
dd2155a4 DM |
204 | } |
205 | ||
206 | AvREAL_off(padlist); | |
207 | av_store(padlist, 0, (SV*)padname); | |
208 | av_store(padlist, 1, (SV*)pad); | |
209 | ||
210 | /* ... then update state variables */ | |
211 | ||
212 | PL_comppad_name = (AV*)(*av_fetch(padlist, 0, FALSE)); | |
213 | PL_comppad = (AV*)(*av_fetch(padlist, 1, FALSE)); | |
214 | PL_curpad = AvARRAY(PL_comppad); | |
215 | ||
216 | if (! (flags & padnew_CLONE)) { | |
217 | PL_comppad_name_fill = 0; | |
218 | PL_min_intro_pending = 0; | |
219 | PL_padix = 0; | |
b5c19bd7 | 220 | PL_cv_has_eval = 0; |
dd2155a4 DM |
221 | } |
222 | ||
223 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
b5c19bd7 | 224 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 | 225 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 | 226 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
dd2155a4 DM |
227 | PTR2UV(padname), (UV)flags |
228 | ) | |
229 | ); | |
230 | ||
231 | return (PADLIST*)padlist; | |
232 | } | |
233 | ||
234 | /* | |
235 | =for apidoc pad_undef | |
236 | ||
237 | Free the padlist associated with a CV. | |
238 | If parts of it happen to be current, we null the relevant | |
239 | PL_*pad* global vars so that we don't have any dangling references left. | |
240 | We also repoint the CvOUTSIDE of any about-to-be-orphaned | |
a3985cdc | 241 | inner subs to the outer of this cv. |
dd2155a4 | 242 | |
7dafbf52 DM |
243 | (This function should really be called pad_free, but the name was already |
244 | taken) | |
245 | ||
dd2155a4 DM |
246 | =cut |
247 | */ | |
248 | ||
249 | void | |
a3985cdc | 250 | Perl_pad_undef(pTHX_ CV* cv) |
dd2155a4 | 251 | { |
97aff369 | 252 | dVAR; |
dd2155a4 | 253 | I32 ix; |
b64e5050 | 254 | const PADLIST * const padlist = CvPADLIST(cv); |
dd2155a4 | 255 | |
7918f24d NC |
256 | PERL_ARGS_ASSERT_PAD_UNDEF; |
257 | ||
1dba731d | 258 | pad_peg("pad_undef"); |
dd2155a4 DM |
259 | if (!padlist) |
260 | return; | |
0565a181 | 261 | if (SvIS_FREED(padlist)) /* may be during global destruction */ |
dd2155a4 DM |
262 | return; |
263 | ||
264 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
503de470 DM |
265 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", |
266 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) | |
dd2155a4 DM |
267 | ); |
268 | ||
7dafbf52 DM |
269 | /* detach any '&' anon children in the pad; if afterwards they |
270 | * are still live, fix up their CvOUTSIDEs to point to our outside, | |
271 | * bypassing us. */ | |
272 | /* XXX DAPM for efficiency, we should only do this if we know we have | |
273 | * children, or integrate this loop with general cleanup */ | |
dd2155a4 | 274 | |
7dafbf52 | 275 | if (!PL_dirty) { /* don't bother during global destruction */ |
53c1dcc0 | 276 | CV * const outercv = CvOUTSIDE(cv); |
e1ec3a88 | 277 | const U32 seq = CvOUTSIDE_SEQ(cv); |
53c1dcc0 AL |
278 | AV * const comppad_name = (AV*)AvARRAY(padlist)[0]; |
279 | SV ** const namepad = AvARRAY(comppad_name); | |
280 | AV * const comppad = (AV*)AvARRAY(padlist)[1]; | |
281 | SV ** const curpad = AvARRAY(comppad); | |
dd2155a4 | 282 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
504618e9 | 283 | SV * const namesv = namepad[ix]; |
dd2155a4 | 284 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 285 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 286 | { |
7fc63493 | 287 | CV * const innercv = (CV*)curpad[ix]; |
10dc53a8 DM |
288 | U32 inner_rc = SvREFCNT(innercv); |
289 | assert(inner_rc); | |
a0714e2c | 290 | namepad[ix] = NULL; |
7dafbf52 | 291 | SvREFCNT_dec(namesv); |
01773faa DM |
292 | |
293 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ | |
a0714e2c | 294 | curpad[ix] = NULL; |
01773faa | 295 | SvREFCNT_dec(innercv); |
10dc53a8 | 296 | inner_rc--; |
01773faa | 297 | } |
b37c2d43 AL |
298 | |
299 | /* in use, not just a prototype */ | |
300 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { | |
7dafbf52 | 301 | assert(CvWEAKOUTSIDE(innercv)); |
9d1ce744 JH |
302 | /* don't relink to grandfather if he's being freed */ |
303 | if (outercv && SvREFCNT(outercv)) { | |
304 | CvWEAKOUTSIDE_off(innercv); | |
305 | CvOUTSIDE(innercv) = outercv; | |
306 | CvOUTSIDE_SEQ(innercv) = seq; | |
f84c484e | 307 | SvREFCNT_inc_simple_void_NN(outercv); |
9d1ce744 JH |
308 | } |
309 | else { | |
601f1833 | 310 | CvOUTSIDE(innercv) = NULL; |
9d1ce744 | 311 | } |
dd2155a4 DM |
312 | } |
313 | } | |
314 | } | |
315 | } | |
7dafbf52 | 316 | |
dd2155a4 DM |
317 | ix = AvFILLp(padlist); |
318 | while (ix >= 0) { | |
b37c2d43 AL |
319 | const SV* const sv = AvARRAY(padlist)[ix--]; |
320 | if (sv) { | |
321 | if (sv == (SV*)PL_comppad_name) | |
322 | PL_comppad_name = NULL; | |
323 | else if (sv == (SV*)PL_comppad) { | |
324 | PL_comppad = NULL; | |
325 | PL_curpad = NULL; | |
326 | } | |
dd2155a4 DM |
327 | } |
328 | SvREFCNT_dec(sv); | |
329 | } | |
330 | SvREFCNT_dec((SV*)CvPADLIST(cv)); | |
4608196e | 331 | CvPADLIST(cv) = NULL; |
dd2155a4 DM |
332 | } |
333 | ||
334 | ||
335 | ||
336 | ||
337 | /* | |
338 | =for apidoc pad_add_name | |
339 | ||
b5c19bd7 DM |
340 | Create a new name and associated PADMY SV in the current pad; return the |
341 | offset. | |
dd2155a4 DM |
342 | If C<typestash> is valid, the name is for a typed lexical; set the |
343 | name's stash to that value. | |
344 | If C<ourstash> is valid, it's an our lexical, set the name's | |
73d95100 | 345 | SvOURSTASH to that value |
dd2155a4 | 346 | |
dd2155a4 DM |
347 | If fake, it means we're cloning an existing entry |
348 | ||
349 | =cut | |
350 | */ | |
351 | ||
dd2155a4 | 352 | PADOFFSET |
952306ac | 353 | Perl_pad_add_name(pTHX_ const char *name, HV* typestash, HV* ourstash, bool fake, bool state) |
dd2155a4 | 354 | { |
97aff369 | 355 | dVAR; |
504618e9 | 356 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
b9f83d2f NC |
357 | SV* const namesv |
358 | = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); | |
dd2155a4 | 359 | |
7918f24d NC |
360 | PERL_ARGS_ASSERT_PAD_ADD_NAME; |
361 | ||
f3548bdc DM |
362 | ASSERT_CURPAD_ACTIVE("pad_add_name"); |
363 | ||
dd2155a4 DM |
364 | sv_setpv(namesv, name); |
365 | ||
366 | if (typestash) { | |
63f10712 | 367 | assert(SvTYPE(namesv) == SVt_PVMG); |
00b1698f | 368 | SvPAD_TYPED_on(namesv); |
b37c2d43 | 369 | SvSTASH_set(namesv, (HV*)SvREFCNT_inc_simple_NN((SV*)typestash)); |
dd2155a4 DM |
370 | } |
371 | if (ourstash) { | |
00b1698f | 372 | SvPAD_OUR_on(namesv); |
73d95100 | 373 | SvOURSTASH_set(namesv, ourstash); |
f84c484e | 374 | SvREFCNT_inc_simple_void_NN(ourstash); |
dd2155a4 | 375 | } |
952306ac RGS |
376 | else if (state) { |
377 | SvPAD_STATE_on(namesv); | |
378 | } | |
dd2155a4 DM |
379 | |
380 | av_store(PL_comppad_name, offset, namesv); | |
b5c19bd7 | 381 | if (fake) { |
dd2155a4 | 382 | SvFAKE_on(namesv); |
b5c19bd7 DM |
383 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
384 | "Pad addname: %ld \"%s\" FAKE\n", (long)offset, name)); | |
385 | } | |
dd2155a4 | 386 | else { |
ee6cee0c | 387 | /* not yet introduced */ |
809abb02 NC |
388 | COP_SEQ_RANGE_LOW_set(namesv, PAD_MAX); /* min */ |
389 | COP_SEQ_RANGE_HIGH_set(namesv, 0); /* max */ | |
ee6cee0c | 390 | |
dd2155a4 DM |
391 | if (!PL_min_intro_pending) |
392 | PL_min_intro_pending = offset; | |
393 | PL_max_intro_pending = offset; | |
b5c19bd7 | 394 | /* if it's not a simple scalar, replace with an AV or HV */ |
f3548bdc DM |
395 | /* XXX DAPM since slot has been allocated, replace |
396 | * av_store with PL_curpad[offset] ? */ | |
dd2155a4 DM |
397 | if (*name == '@') |
398 | av_store(PL_comppad, offset, (SV*)newAV()); | |
399 | else if (*name == '%') | |
400 | av_store(PL_comppad, offset, (SV*)newHV()); | |
401 | SvPADMY_on(PL_curpad[offset]); | |
b5c19bd7 DM |
402 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
403 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", | |
404 | (long)offset, name, PTR2UV(PL_curpad[offset]))); | |
dd2155a4 DM |
405 | } |
406 | ||
407 | return offset; | |
408 | } | |
409 | ||
410 | ||
411 | ||
412 | ||
413 | /* | |
414 | =for apidoc pad_alloc | |
415 | ||
416 | Allocate a new my or tmp pad entry. For a my, simply push a null SV onto | |
417 | the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards | |
cf525c36 | 418 | for a slot which has no name and no active value. |
dd2155a4 DM |
419 | |
420 | =cut | |
421 | */ | |
422 | ||
423 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), | |
424 | * or at least rationalise ??? */ | |
6d640399 NC |
425 | /* And flag whether the incoming name is UTF8 or 8 bit? |
426 | Could do this either with the +ve/-ve hack of the HV code, or expanding | |
427 | the flag bits. Either way, this makes proper Unicode safe pad support. | |
6d640399 NC |
428 | NWC |
429 | */ | |
dd2155a4 DM |
430 | |
431 | PADOFFSET | |
432 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) | |
433 | { | |
97aff369 | 434 | dVAR; |
dd2155a4 DM |
435 | SV *sv; |
436 | I32 retval; | |
437 | ||
6136c704 | 438 | PERL_UNUSED_ARG(optype); |
f3548bdc DM |
439 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
440 | ||
dd2155a4 DM |
441 | if (AvARRAY(PL_comppad) != PL_curpad) |
442 | Perl_croak(aTHX_ "panic: pad_alloc"); | |
443 | if (PL_pad_reset_pending) | |
444 | pad_reset(); | |
445 | if (tmptype & SVs_PADMY) { | |
235cc2e3 | 446 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 DM |
447 | retval = AvFILLp(PL_comppad); |
448 | } | |
449 | else { | |
551405c4 | 450 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 | 451 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 DM |
452 | for (;;) { |
453 | /* | |
454 | * "foreach" index vars temporarily become aliases to non-"my" | |
455 | * values. Thus we must skip, not just pad values that are | |
456 | * marked as current pad values, but also those with names. | |
457 | */ | |
458 | /* HVDS why copy to sv here? we don't seem to use it */ | |
459 | if (++PL_padix <= names_fill && | |
460 | (sv = names[PL_padix]) && sv != &PL_sv_undef) | |
461 | continue; | |
462 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); | |
463 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && | |
464 | !IS_PADGV(sv) && !IS_PADCONST(sv)) | |
465 | break; | |
466 | } | |
467 | retval = PL_padix; | |
468 | } | |
469 | SvFLAGS(sv) |= tmptype; | |
470 | PL_curpad = AvARRAY(PL_comppad); | |
471 | ||
472 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
473 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", | |
474 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, | |
475 | PL_op_name[optype])); | |
fd0854ff DM |
476 | #ifdef DEBUG_LEAKING_SCALARS |
477 | sv->sv_debug_optype = optype; | |
478 | sv->sv_debug_inpad = 1; | |
fd0854ff | 479 | #endif |
a212c8b5 | 480 | return (PADOFFSET)retval; |
dd2155a4 DM |
481 | } |
482 | ||
483 | /* | |
484 | =for apidoc pad_add_anon | |
485 | ||
486 | Add an anon code entry to the current compiling pad | |
487 | ||
488 | =cut | |
489 | */ | |
490 | ||
491 | PADOFFSET | |
492 | Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type) | |
493 | { | |
97aff369 | 494 | dVAR; |
dd2155a4 | 495 | PADOFFSET ix; |
b9f83d2f | 496 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d NC |
497 | |
498 | PERL_ARGS_ASSERT_PAD_ADD_ANON; | |
499 | ||
1dba731d | 500 | pad_peg("add_anon"); |
dd2155a4 | 501 | sv_setpvn(name, "&", 1); |
809abb02 NC |
502 | /* Are these two actually ever read? */ |
503 | COP_SEQ_RANGE_HIGH_set(name, ~0); | |
504 | COP_SEQ_RANGE_LOW_set(name, 1); | |
dd2155a4 DM |
505 | ix = pad_alloc(op_type, SVs_PADMY); |
506 | av_store(PL_comppad_name, ix, name); | |
f3548bdc | 507 | /* XXX DAPM use PL_curpad[] ? */ |
dd2155a4 DM |
508 | av_store(PL_comppad, ix, sv); |
509 | SvPADMY_on(sv); | |
7dafbf52 DM |
510 | |
511 | /* to avoid ref loops, we never have parent + child referencing each | |
512 | * other simultaneously */ | |
513 | if (CvOUTSIDE((CV*)sv)) { | |
514 | assert(!CvWEAKOUTSIDE((CV*)sv)); | |
515 | CvWEAKOUTSIDE_on((CV*)sv); | |
516 | SvREFCNT_dec(CvOUTSIDE((CV*)sv)); | |
517 | } | |
dd2155a4 DM |
518 | return ix; |
519 | } | |
520 | ||
521 | ||
522 | ||
523 | /* | |
524 | =for apidoc pad_check_dup | |
525 | ||
526 | Check for duplicate declarations: report any of: | |
527 | * a my in the current scope with the same name; | |
528 | * an our (anywhere in the pad) with the same name and the same stash | |
529 | as C<ourstash> | |
530 | C<is_our> indicates that the name to check is an 'our' declaration | |
531 | ||
532 | =cut | |
533 | */ | |
534 | ||
535 | /* XXX DAPM integrate this into pad_add_name ??? */ | |
536 | ||
537 | void | |
e1ec3a88 | 538 | Perl_pad_check_dup(pTHX_ const char *name, bool is_our, const HV *ourstash) |
dd2155a4 | 539 | { |
97aff369 | 540 | dVAR; |
53c1dcc0 | 541 | SV **svp; |
dd2155a4 DM |
542 | PADOFFSET top, off; |
543 | ||
7918f24d NC |
544 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
545 | ||
f3548bdc | 546 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
041457d9 | 547 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 DM |
548 | return; /* nothing to check */ |
549 | ||
550 | svp = AvARRAY(PL_comppad_name); | |
551 | top = AvFILLp(PL_comppad_name); | |
552 | /* check the current scope */ | |
553 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same | |
554 | * type ? */ | |
555 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { | |
53c1dcc0 AL |
556 | SV * const sv = svp[off]; |
557 | if (sv | |
dd2155a4 | 558 | && sv != &PL_sv_undef |
ee6cee0c | 559 | && !SvFAKE(sv) |
809abb02 | 560 | && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0) |
b15aece3 | 561 | && strEQ(name, SvPVX_const(sv))) |
dd2155a4 | 562 | { |
00b1698f | 563 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 | 564 | break; /* "our" masking "our" */ |
dd2155a4 DM |
565 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
566 | "\"%s\" variable %s masks earlier declaration in same %s", | |
12bd6ede | 567 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
dd2155a4 | 568 | name, |
809abb02 | 569 | (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX ? "scope" : "statement")); |
dd2155a4 DM |
570 | --off; |
571 | break; | |
572 | } | |
573 | } | |
574 | /* check the rest of the pad */ | |
575 | if (is_our) { | |
576 | do { | |
53c1dcc0 AL |
577 | SV * const sv = svp[off]; |
578 | if (sv | |
dd2155a4 | 579 | && sv != &PL_sv_undef |
ee6cee0c | 580 | && !SvFAKE(sv) |
809abb02 | 581 | && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0) |
73d95100 | 582 | && SvOURSTASH(sv) == ourstash |
b15aece3 | 583 | && strEQ(name, SvPVX_const(sv))) |
dd2155a4 DM |
584 | { |
585 | Perl_warner(aTHX_ packWARN(WARN_MISC), | |
586 | "\"our\" variable %s redeclared", name); | |
624f69f5 | 587 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 RGS |
588 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
589 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); | |
dd2155a4 DM |
590 | break; |
591 | } | |
592 | } while ( off-- > 0 ); | |
593 | } | |
594 | } | |
595 | ||
596 | ||
dd2155a4 DM |
597 | /* |
598 | =for apidoc pad_findmy | |
599 | ||
600 | Given a lexical name, try to find its offset, first in the current pad, | |
601 | or failing that, in the pads of any lexically enclosing subs (including | |
602 | the complications introduced by eval). If the name is found in an outer pad, | |
603 | then a fake entry is added to the current pad. | |
604 | Returns the offset in the current pad, or NOT_IN_PAD on failure. | |
605 | ||
606 | =cut | |
607 | */ | |
608 | ||
609 | PADOFFSET | |
e1ec3a88 | 610 | Perl_pad_findmy(pTHX_ const char *name) |
dd2155a4 | 611 | { |
97aff369 | 612 | dVAR; |
b5c19bd7 DM |
613 | SV *out_sv; |
614 | int out_flags; | |
929a0744 | 615 | I32 offset; |
e1ec3a88 | 616 | const AV *nameav; |
929a0744 | 617 | SV **name_svp; |
dd2155a4 | 618 | |
7918f24d NC |
619 | PERL_ARGS_ASSERT_PAD_FINDMY; |
620 | ||
1dba731d | 621 | pad_peg("pad_findmy"); |
9f7d9405 | 622 | offset = pad_findlex(name, PL_compcv, PL_cop_seqmax, 1, |
4608196e | 623 | NULL, &out_sv, &out_flags); |
9f7d9405 | 624 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 DM |
625 | return offset; |
626 | ||
627 | /* look for an our that's being introduced; this allows | |
628 | * our $foo = 0 unless defined $foo; | |
629 | * to not give a warning. (Yes, this is a hack) */ | |
630 | ||
631 | nameav = (AV*)AvARRAY(CvPADLIST(PL_compcv))[0]; | |
632 | name_svp = AvARRAY(nameav); | |
633 | for (offset = AvFILLp(nameav); offset > 0; offset--) { | |
551405c4 | 634 | const SV * const namesv = name_svp[offset]; |
929a0744 DM |
635 | if (namesv && namesv != &PL_sv_undef |
636 | && !SvFAKE(namesv) | |
00b1698f | 637 | && (SvPAD_OUR(namesv)) |
b15aece3 | 638 | && strEQ(SvPVX_const(namesv), name) |
809abb02 | 639 | && COP_SEQ_RANGE_LOW(namesv) == PAD_MAX /* min */ |
929a0744 DM |
640 | ) |
641 | return offset; | |
642 | } | |
643 | return NOT_IN_PAD; | |
dd2155a4 DM |
644 | } |
645 | ||
e1f795dc RGS |
646 | /* |
647 | * Returns the offset of a lexical $_, if there is one, at run time. | |
648 | * Used by the UNDERBAR XS macro. | |
649 | */ | |
650 | ||
651 | PADOFFSET | |
29289021 | 652 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc | 653 | { |
97aff369 | 654 | dVAR; |
e1f795dc RGS |
655 | SV *out_sv; |
656 | int out_flags; | |
657 | return pad_findlex("$_", find_runcv(NULL), PL_curcop->cop_seq, 1, | |
4608196e | 658 | NULL, &out_sv, &out_flags); |
e1f795dc | 659 | } |
dd2155a4 | 660 | |
dd2155a4 DM |
661 | /* |
662 | =for apidoc pad_findlex | |
663 | ||
664 | Find a named lexical anywhere in a chain of nested pads. Add fake entries | |
b5c19bd7 DM |
665 | in the inner pads if it's found in an outer one. |
666 | ||
667 | Returns the offset in the bottom pad of the lex or the fake lex. | |
668 | cv is the CV in which to start the search, and seq is the current cop_seq | |
669 | to match against. If warn is true, print appropriate warnings. The out_* | |
670 | vars return values, and so are pointers to where the returned values | |
671 | should be stored. out_capture, if non-null, requests that the innermost | |
672 | instance of the lexical is captured; out_name_sv is set to the innermost | |
673 | matched namesv or fake namesv; out_flags returns the flags normally | |
674 | associated with the IVX field of a fake namesv. | |
675 | ||
676 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, | |
677 | then comes back down, adding fake entries as it goes. It has to be this way | |
3441fb63 | 678 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 | 679 | the parent pad. |
dd2155a4 DM |
680 | |
681 | =cut | |
682 | */ | |
683 | ||
b5c19bd7 DM |
684 | /* the CV has finished being compiled. This is not a sufficient test for |
685 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ | |
686 | #define CvCOMPILED(cv) CvROOT(cv) | |
687 | ||
71f882da DM |
688 | /* the CV does late binding of its lexicals */ |
689 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) | |
690 | ||
b5c19bd7 | 691 | |
dd2155a4 | 692 | STATIC PADOFFSET |
e1ec3a88 | 693 | S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn, |
b5c19bd7 | 694 | SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 | 695 | { |
97aff369 | 696 | dVAR; |
b5c19bd7 DM |
697 | I32 offset, new_offset; |
698 | SV *new_capture; | |
699 | SV **new_capturep; | |
b64e5050 | 700 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 | 701 | |
7918f24d NC |
702 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
703 | ||
b5c19bd7 | 704 | *out_flags = 0; |
a3985cdc | 705 | |
b5c19bd7 DM |
706 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
707 | "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n", | |
708 | PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" )); | |
dd2155a4 | 709 | |
b5c19bd7 | 710 | /* first, search this pad */ |
dd2155a4 | 711 | |
b5c19bd7 DM |
712 | if (padlist) { /* not an undef CV */ |
713 | I32 fake_offset = 0; | |
551405c4 AL |
714 | const AV * const nameav = (AV*)AvARRAY(padlist)[0]; |
715 | SV * const * const name_svp = AvARRAY(nameav); | |
ee6cee0c | 716 | |
b5c19bd7 | 717 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 | 718 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 | 719 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 720 | && strEQ(SvPVX_const(namesv), name)) |
b5c19bd7 DM |
721 | { |
722 | if (SvFAKE(namesv)) | |
723 | fake_offset = offset; /* in case we don't find a real one */ | |
809abb02 NC |
724 | else if ( seq > COP_SEQ_RANGE_LOW(namesv) /* min */ |
725 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) /* max */ | |
b5c19bd7 | 726 | break; |
ee6cee0c DM |
727 | } |
728 | } | |
729 | ||
b5c19bd7 DM |
730 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
731 | if (offset > 0) { /* not fake */ | |
732 | fake_offset = 0; | |
733 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
734 | ||
735 | /* set PAD_FAKELEX_MULTI if this lex can have multiple | |
736 | * instances. For now, we just test !CvUNIQUE(cv), but | |
737 | * ideally, we should detect my's declared within loops | |
738 | * etc - this would allow a wider range of 'not stayed | |
739 | * shared' warnings. We also treated alreadly-compiled | |
740 | * lexes as not multi as viewed from evals. */ | |
741 | ||
742 | *out_flags = CvANON(cv) ? | |
743 | PAD_FAKELEX_ANON : | |
744 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) | |
745 | ? PAD_FAKELEX_MULTI : 0; | |
746 | ||
747 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
809abb02 NC |
748 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
749 | PTR2UV(cv), (long)offset, | |
750 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), | |
751 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); | |
b5c19bd7 DM |
752 | } |
753 | else { /* fake match */ | |
754 | offset = fake_offset; | |
755 | *out_name_sv = name_svp[offset]; /* return the namesv */ | |
809abb02 | 756 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 | 757 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 | 758 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 | 759 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 | 760 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 DM |
761 | )); |
762 | } | |
dd2155a4 | 763 | |
b5c19bd7 | 764 | /* return the lex? */ |
dd2155a4 | 765 | |
b5c19bd7 | 766 | if (out_capture) { |
dd2155a4 | 767 | |
b5c19bd7 | 768 | /* our ? */ |
00b1698f | 769 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c | 770 | *out_capture = NULL; |
b5c19bd7 DM |
771 | return offset; |
772 | } | |
ee6cee0c | 773 | |
b5c19bd7 DM |
774 | /* trying to capture from an anon prototype? */ |
775 | if (CvCOMPILED(cv) | |
776 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) | |
777 | : *out_flags & PAD_FAKELEX_ANON) | |
778 | { | |
779 | if (warn && ckWARN(WARN_CLOSURE)) | |
780 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
781 | "Variable \"%s\" is not available", name); | |
a0714e2c | 782 | *out_capture = NULL; |
b5c19bd7 | 783 | } |
ee6cee0c | 784 | |
b5c19bd7 DM |
785 | /* real value */ |
786 | else { | |
787 | int newwarn = warn; | |
788 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) | |
d1186544 | 789 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 DM |
790 | && warn && ckWARN(WARN_CLOSURE)) { |
791 | newwarn = 0; | |
792 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
793 | "Variable \"%s\" will not stay shared", name); | |
794 | } | |
dd2155a4 | 795 | |
b5c19bd7 DM |
796 | if (fake_offset && CvANON(cv) |
797 | && CvCLONE(cv) &&!CvCLONED(cv)) | |
798 | { | |
799 | SV *n; | |
800 | /* not yet caught - look further up */ | |
801 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
802 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", | |
803 | PTR2UV(cv))); | |
804 | n = *out_name_sv; | |
282e1742 DM |
805 | (void) pad_findlex(name, CvOUTSIDE(cv), |
806 | CvOUTSIDE_SEQ(cv), | |
b5c19bd7 DM |
807 | newwarn, out_capture, out_name_sv, out_flags); |
808 | *out_name_sv = n; | |
809 | return offset; | |
dd2155a4 | 810 | } |
b5c19bd7 DM |
811 | |
812 | *out_capture = AvARRAY((AV*)AvARRAY(padlist)[ | |
813 | CvDEPTH(cv) ? CvDEPTH(cv) : 1])[offset]; | |
814 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
815 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", | |
19a5c512 | 816 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 | 817 | |
d1186544 DM |
818 | if (SvPADSTALE(*out_capture) |
819 | && !SvPAD_STATE(name_svp[offset])) | |
820 | { | |
b5c19bd7 | 821 | if (ckWARN(WARN_CLOSURE)) |
ee6cee0c | 822 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
b5c19bd7 | 823 | "Variable \"%s\" is not available", name); |
a0714e2c | 824 | *out_capture = NULL; |
dd2155a4 DM |
825 | } |
826 | } | |
b5c19bd7 DM |
827 | if (!*out_capture) { |
828 | if (*name == '@') | |
829 | *out_capture = sv_2mortal((SV*)newAV()); | |
830 | else if (*name == '%') | |
831 | *out_capture = sv_2mortal((SV*)newHV()); | |
832 | else | |
833 | *out_capture = sv_newmortal(); | |
834 | } | |
dd2155a4 | 835 | } |
b5c19bd7 DM |
836 | |
837 | return offset; | |
ee6cee0c | 838 | } |
b5c19bd7 DM |
839 | } |
840 | ||
841 | /* it's not in this pad - try above */ | |
842 | ||
843 | if (!CvOUTSIDE(cv)) | |
844 | return NOT_IN_PAD; | |
9f7d9405 | 845 | |
b5c19bd7 | 846 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da | 847 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 | 848 | new_capturep = out_capture ? out_capture : |
4608196e | 849 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 DM |
850 | |
851 | offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, | |
852 | new_capturep, out_name_sv, out_flags); | |
9f7d9405 | 853 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 | 854 | return NOT_IN_PAD; |
9f7d9405 | 855 | |
b5c19bd7 DM |
856 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
857 | ||
858 | /* don't add new fake entries (via eval) to CVs that we have already | |
859 | * finished compiling, or to undef CVs */ | |
860 | if (CvCOMPILED(cv) || !padlist) | |
861 | return 0; /* this dummy (and invalid) value isnt used by the caller */ | |
862 | ||
863 | { | |
864 | SV *new_namesv; | |
53c1dcc0 AL |
865 | AV * const ocomppad_name = PL_comppad_name; |
866 | PAD * const ocomppad = PL_comppad; | |
b5c19bd7 DM |
867 | PL_comppad_name = (AV*)AvARRAY(padlist)[0]; |
868 | PL_comppad = (AV*)AvARRAY(padlist)[1]; | |
869 | PL_curpad = AvARRAY(PL_comppad); | |
870 | ||
871 | new_offset = pad_add_name( | |
b15aece3 | 872 | SvPVX_const(*out_name_sv), |
00b1698f | 873 | SvPAD_TYPED(*out_name_sv) |
5c284bb0 | 874 | ? SvSTASH(*out_name_sv) : NULL, |
73d95100 | 875 | SvOURSTASH(*out_name_sv), |
952306ac | 876 | 1, /* fake */ |
d1186544 | 877 | SvPAD_STATE(*out_name_sv) ? 1 : 0 /* state variable ? */ |
b5c19bd7 DM |
878 | ); |
879 | ||
880 | new_namesv = AvARRAY(PL_comppad_name)[new_offset]; | |
809abb02 | 881 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 | 882 | |
809abb02 | 883 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f | 884 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 | 885 | NOOP; /* do nothing */ |
b5c19bd7 | 886 | } |
71f882da | 887 | else if (CvLATE(cv)) { |
b5c19bd7 | 888 | /* delayed creation - just note the offset within parent pad */ |
809abb02 | 889 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 DM |
890 | CvCLONE_on(cv); |
891 | } | |
892 | else { | |
893 | /* immediate creation - capture outer value right now */ | |
894 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); | |
895 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
896 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", | |
897 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); | |
dd2155a4 | 898 | } |
b5c19bd7 | 899 | *out_name_sv = new_namesv; |
809abb02 | 900 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 DM |
901 | |
902 | PL_comppad_name = ocomppad_name; | |
903 | PL_comppad = ocomppad; | |
4608196e | 904 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 | 905 | } |
b5c19bd7 | 906 | return new_offset; |
dd2155a4 DM |
907 | } |
908 | ||
fb8a9836 AL |
909 | |
910 | #ifdef DEBUGGING | |
dd2155a4 DM |
911 | /* |
912 | =for apidoc pad_sv | |
913 | ||
914 | Get the value at offset po in the current pad. | |
915 | Use macro PAD_SV instead of calling this function directly. | |
916 | ||
917 | =cut | |
918 | */ | |
919 | ||
920 | ||
921 | SV * | |
922 | Perl_pad_sv(pTHX_ PADOFFSET po) | |
923 | { | |
97aff369 | 924 | dVAR; |
f3548bdc | 925 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 | 926 | |
dd2155a4 DM |
927 | if (!po) |
928 | Perl_croak(aTHX_ "panic: pad_sv po"); | |
dd2155a4 DM |
929 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
930 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 931 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 DM |
932 | ); |
933 | return PL_curpad[po]; | |
934 | } | |
935 | ||
936 | ||
937 | /* | |
938 | =for apidoc pad_setsv | |
939 | ||
940 | Set the entry at offset po in the current pad to sv. | |
941 | Use the macro PAD_SETSV() rather than calling this function directly. | |
942 | ||
943 | =cut | |
944 | */ | |
945 | ||
dd2155a4 DM |
946 | void |
947 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) | |
948 | { | |
97aff369 | 949 | dVAR; |
7918f24d NC |
950 | |
951 | PERL_ARGS_ASSERT_PAD_SETSV; | |
952 | ||
f3548bdc | 953 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 DM |
954 | |
955 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
956 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", | |
f3548bdc | 957 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 DM |
958 | ); |
959 | PL_curpad[po] = sv; | |
960 | } | |
961 | #endif | |
962 | ||
963 | ||
964 | ||
965 | /* | |
966 | =for apidoc pad_block_start | |
967 | ||
968 | Update the pad compilation state variables on entry to a new block | |
969 | ||
970 | =cut | |
971 | */ | |
972 | ||
973 | /* XXX DAPM perhaps: | |
974 | * - integrate this in general state-saving routine ??? | |
975 | * - combine with the state-saving going on in pad_new ??? | |
976 | * - introduce a new SAVE type that does all this in one go ? | |
977 | */ | |
978 | ||
979 | void | |
980 | Perl_pad_block_start(pTHX_ int full) | |
981 | { | |
97aff369 | 982 | dVAR; |
f3548bdc | 983 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 DM |
984 | SAVEI32(PL_comppad_name_floor); |
985 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); | |
986 | if (full) | |
987 | PL_comppad_name_fill = PL_comppad_name_floor; | |
988 | if (PL_comppad_name_floor < 0) | |
989 | PL_comppad_name_floor = 0; | |
990 | SAVEI32(PL_min_intro_pending); | |
991 | SAVEI32(PL_max_intro_pending); | |
992 | PL_min_intro_pending = 0; | |
993 | SAVEI32(PL_comppad_name_fill); | |
994 | SAVEI32(PL_padix_floor); | |
995 | PL_padix_floor = PL_padix; | |
996 | PL_pad_reset_pending = FALSE; | |
997 | } | |
998 | ||
999 | ||
1000 | /* | |
1001 | =for apidoc intro_my | |
1002 | ||
1003 | "Introduce" my variables to visible status. | |
1004 | ||
1005 | =cut | |
1006 | */ | |
1007 | ||
1008 | U32 | |
1009 | Perl_intro_my(pTHX) | |
1010 | { | |
97aff369 | 1011 | dVAR; |
dd2155a4 | 1012 | SV **svp; |
dd2155a4 DM |
1013 | I32 i; |
1014 | ||
f3548bdc | 1015 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 DM |
1016 | if (! PL_min_intro_pending) |
1017 | return PL_cop_seqmax; | |
1018 | ||
1019 | svp = AvARRAY(PL_comppad_name); | |
1020 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { | |
53c1dcc0 AL |
1021 | SV * const sv = svp[i]; |
1022 | ||
809abb02 NC |
1023 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && !COP_SEQ_RANGE_HIGH(sv)) { |
1024 | COP_SEQ_RANGE_HIGH_set(sv, PAD_MAX); /* Don't know scope end yet. */ | |
1025 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); | |
dd2155a4 | 1026 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1027 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1028 | (long)i, SvPVX_const(sv), |
809abb02 NC |
1029 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1030 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1031 | ); |
1032 | } | |
1033 | } | |
1034 | PL_min_intro_pending = 0; | |
1035 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ | |
1036 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1037 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax+1))); | |
1038 | ||
1039 | return PL_cop_seqmax++; | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | =for apidoc pad_leavemy | |
1044 | ||
1045 | Cleanup at end of scope during compilation: set the max seq number for | |
1046 | lexicals in this scope and warn of any lexicals that never got introduced. | |
1047 | ||
1048 | =cut | |
1049 | */ | |
1050 | ||
1051 | void | |
1052 | Perl_pad_leavemy(pTHX) | |
1053 | { | |
97aff369 | 1054 | dVAR; |
dd2155a4 | 1055 | I32 off; |
551405c4 | 1056 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 DM |
1057 | |
1058 | PL_pad_reset_pending = FALSE; | |
1059 | ||
f3548bdc | 1060 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 DM |
1061 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1062 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { | |
53c1dcc0 AL |
1063 | const SV * const sv = svp[off]; |
1064 | if (sv && sv != &PL_sv_undef | |
ee6cee0c | 1065 | && !SvFAKE(sv) && ckWARN_d(WARN_INTERNAL)) |
dd2155a4 | 1066 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
95b63a38 | 1067 | "%"SVf" never introduced", |
be2597df | 1068 | SVfARG(sv)); |
dd2155a4 DM |
1069 | } |
1070 | } | |
1071 | /* "Deintroduce" my variables that are leaving with this scope. */ | |
1072 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { | |
53c1dcc0 | 1073 | const SV * const sv = svp[off]; |
809abb02 NC |
1074 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && COP_SEQ_RANGE_HIGH(sv) == PAD_MAX) { |
1075 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); | |
dd2155a4 | 1076 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 | 1077 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 | 1078 | (long)off, SvPVX_const(sv), |
809abb02 NC |
1079 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1080 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) | |
dd2155a4 DM |
1081 | ); |
1082 | } | |
1083 | } | |
1084 | PL_cop_seqmax++; | |
1085 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1086 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); | |
1087 | } | |
1088 | ||
1089 | ||
1090 | /* | |
1091 | =for apidoc pad_swipe | |
1092 | ||
1093 | Abandon the tmp in the current pad at offset po and replace with a | |
1094 | new one. | |
1095 | ||
1096 | =cut | |
1097 | */ | |
1098 | ||
1099 | void | |
1100 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) | |
1101 | { | |
97aff369 | 1102 | dVAR; |
f3548bdc | 1103 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 DM |
1104 | if (!PL_curpad) |
1105 | return; | |
1106 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1107 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); | |
1108 | if (!po) | |
1109 | Perl_croak(aTHX_ "panic: pad_swipe po"); | |
1110 | ||
1111 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1112 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", | |
1113 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); | |
1114 | ||
1115 | if (PL_curpad[po]) | |
1116 | SvPADTMP_off(PL_curpad[po]); | |
1117 | if (refadjust) | |
1118 | SvREFCNT_dec(PL_curpad[po]); | |
1119 | ||
9ad9869c DM |
1120 | |
1121 | /* if pad tmps aren't shared between ops, then there's no need to | |
1122 | * create a new tmp when an existing op is freed */ | |
1123 | #ifdef USE_BROKEN_PAD_RESET | |
561b68a9 | 1124 | PL_curpad[po] = newSV(0); |
dd2155a4 | 1125 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c DM |
1126 | #else |
1127 | PL_curpad[po] = &PL_sv_undef; | |
97bf4a8d | 1128 | #endif |
dd2155a4 DM |
1129 | if ((I32)po < PL_padix) |
1130 | PL_padix = po - 1; | |
1131 | } | |
1132 | ||
1133 | ||
1134 | /* | |
1135 | =for apidoc pad_reset | |
1136 | ||
1137 | Mark all the current temporaries for reuse | |
1138 | ||
1139 | =cut | |
1140 | */ | |
1141 | ||
1142 | /* XXX pad_reset() is currently disabled because it results in serious bugs. | |
1143 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed | |
1144 | * on the stack by OPs that use them, there are several ways to get an alias | |
1145 | * to a shared TARG. Such an alias will change randomly and unpredictably. | |
1146 | * We avoid doing this until we can think of a Better Way. | |
1147 | * GSAR 97-10-29 */ | |
1148 | void | |
1149 | Perl_pad_reset(pTHX) | |
1150 | { | |
97aff369 | 1151 | dVAR; |
dd2155a4 | 1152 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 DM |
1153 | if (AvARRAY(PL_comppad) != PL_curpad) |
1154 | Perl_croak(aTHX_ "panic: pad_reset curpad"); | |
1155 | ||
1156 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1157 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", | |
1158 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), | |
1159 | (long)PL_padix, (long)PL_padix_floor | |
1160 | ) | |
1161 | ); | |
1162 | ||
1163 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ | |
e1ec3a88 | 1164 | register I32 po; |
dd2155a4 DM |
1165 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1166 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) | |
1167 | SvPADTMP_off(PL_curpad[po]); | |
1168 | } | |
1169 | PL_padix = PL_padix_floor; | |
1170 | } | |
1171 | #endif | |
1172 | PL_pad_reset_pending = FALSE; | |
1173 | } | |
1174 | ||
1175 | ||
1176 | /* | |
1177 | =for apidoc pad_tidy | |
1178 | ||
1179 | Tidy up a pad after we've finished compiling it: | |
1180 | * remove most stuff from the pads of anonsub prototypes; | |
1181 | * give it a @_; | |
1182 | * mark tmps as such. | |
1183 | ||
1184 | =cut | |
1185 | */ | |
1186 | ||
1187 | /* XXX DAPM surely most of this stuff should be done properly | |
1188 | * at the right time beforehand, rather than going around afterwards | |
1189 | * cleaning up our mistakes ??? | |
1190 | */ | |
1191 | ||
1192 | void | |
1193 | Perl_pad_tidy(pTHX_ padtidy_type type) | |
1194 | { | |
27da23d5 | 1195 | dVAR; |
dd2155a4 | 1196 | |
f3548bdc | 1197 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 DM |
1198 | |
1199 | /* If this CV has had any 'eval-capable' ops planted in it | |
1200 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any | |
1201 | * anon prototypes in the chain of CVs should be marked as cloneable, | |
1202 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets | |
1203 | * the right CvOUTSIDE. | |
1204 | * If running with -d, *any* sub may potentially have an eval | |
1205 | * excuted within it. | |
1206 | */ | |
1207 | ||
1208 | if (PL_cv_has_eval || PL_perldb) { | |
e1ec3a88 | 1209 | const CV *cv; |
b5c19bd7 DM |
1210 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1211 | if (cv != PL_compcv && CvCOMPILED(cv)) | |
1212 | break; /* no need to mark already-compiled code */ | |
1213 | if (CvANON(cv)) { | |
1214 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, | |
1215 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); | |
1216 | CvCLONE_on(cv); | |
1217 | } | |
1218 | } | |
1219 | } | |
1220 | ||
dd2155a4 DM |
1221 | /* extend curpad to match namepad */ |
1222 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) | |
a0714e2c | 1223 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 DM |
1224 | |
1225 | if (type == padtidy_SUBCLONE) { | |
551405c4 | 1226 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 | 1227 | PADOFFSET ix; |
b5c19bd7 | 1228 | |
dd2155a4 DM |
1229 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1230 | SV *namesv; | |
1231 | ||
1232 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1233 | continue; | |
1234 | /* | |
1235 | * The only things that a clonable function needs in its | |
b5c19bd7 | 1236 | * pad are anonymous subs. |
dd2155a4 DM |
1237 | * The rest are created anew during cloning. |
1238 | */ | |
a0714e2c | 1239 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 | 1240 | namesv != &PL_sv_undef && |
b15aece3 | 1241 | *SvPVX_const(namesv) == '&')) |
dd2155a4 DM |
1242 | { |
1243 | SvREFCNT_dec(PL_curpad[ix]); | |
a0714e2c | 1244 | PL_curpad[ix] = NULL; |
dd2155a4 DM |
1245 | } |
1246 | } | |
1247 | } | |
1248 | else if (type == padtidy_SUB) { | |
1249 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ | |
53c1dcc0 | 1250 | AV * const av = newAV(); /* Will be @_ */ |
dd2155a4 DM |
1251 | av_extend(av, 0); |
1252 | av_store(PL_comppad, 0, (SV*)av); | |
11ca45c0 | 1253 | AvREIFY_only(av); |
dd2155a4 DM |
1254 | } |
1255 | ||
1256 | /* XXX DAPM rationalise these two similar branches */ | |
1257 | ||
1258 | if (type == padtidy_SUB) { | |
504618e9 | 1259 | PADOFFSET ix; |
dd2155a4 DM |
1260 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1261 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) | |
1262 | continue; | |
1263 | if (!SvPADMY(PL_curpad[ix])) | |
1264 | SvPADTMP_on(PL_curpad[ix]); | |
1265 | } | |
1266 | } | |
1267 | else if (type == padtidy_FORMAT) { | |
504618e9 | 1268 | PADOFFSET ix; |
dd2155a4 DM |
1269 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1270 | if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix])) | |
1271 | SvPADTMP_on(PL_curpad[ix]); | |
1272 | } | |
1273 | } | |
f3548bdc | 1274 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 DM |
1275 | } |
1276 | ||
1277 | ||
1278 | /* | |
1279 | =for apidoc pad_free | |
1280 | ||
8627550a | 1281 | Free the SV at offset po in the current pad. |
dd2155a4 DM |
1282 | |
1283 | =cut | |
1284 | */ | |
1285 | ||
1286 | /* XXX DAPM integrate with pad_swipe ???? */ | |
1287 | void | |
1288 | Perl_pad_free(pTHX_ PADOFFSET po) | |
1289 | { | |
97aff369 | 1290 | dVAR; |
f3548bdc | 1291 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 DM |
1292 | if (!PL_curpad) |
1293 | return; | |
1294 | if (AvARRAY(PL_comppad) != PL_curpad) | |
1295 | Perl_croak(aTHX_ "panic: pad_free curpad"); | |
1296 | if (!po) | |
1297 | Perl_croak(aTHX_ "panic: pad_free po"); | |
1298 | ||
1299 | DEBUG_X(PerlIO_printf(Perl_debug_log, | |
1300 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", | |
1301 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) | |
1302 | ); | |
1303 | ||
1304 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { | |
1305 | SvPADTMP_off(PL_curpad[po]); | |
1306 | #ifdef USE_ITHREADS | |
7e736055 HS |
1307 | /* SV could be a shared hash key (eg bugid #19022) */ |
1308 | if ( | |
f8c7b90f | 1309 | #ifdef PERL_OLD_COPY_ON_WRITE |
7e736055 HS |
1310 | !SvIsCOW(PL_curpad[po]) |
1311 | #else | |
1312 | !SvFAKE(PL_curpad[po]) | |
dd2155a4 | 1313 | #endif |
7e736055 | 1314 | ) |
dd2155a4 | 1315 | SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */ |
dd2155a4 DM |
1316 | #endif |
1317 | } | |
1318 | if ((I32)po < PL_padix) | |
1319 | PL_padix = po - 1; | |
1320 | } | |
1321 | ||
1322 | ||
1323 | ||
1324 | /* | |
1325 | =for apidoc do_dump_pad | |
1326 | ||
1327 | Dump the contents of a padlist | |
1328 | ||
1329 | =cut | |
1330 | */ | |
1331 | ||
1332 | void | |
1333 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) | |
1334 | { | |
97aff369 | 1335 | dVAR; |
e1ec3a88 AL |
1336 | const AV *pad_name; |
1337 | const AV *pad; | |
dd2155a4 DM |
1338 | SV **pname; |
1339 | SV **ppad; | |
dd2155a4 DM |
1340 | I32 ix; |
1341 | ||
7918f24d NC |
1342 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1343 | ||
dd2155a4 DM |
1344 | if (!padlist) { |
1345 | return; | |
1346 | } | |
1347 | pad_name = (AV*)*av_fetch((AV*)padlist, 0, FALSE); | |
1348 | pad = (AV*)*av_fetch((AV*)padlist, 1, FALSE); | |
1349 | pname = AvARRAY(pad_name); | |
1350 | ppad = AvARRAY(pad); | |
1351 | Perl_dump_indent(aTHX_ level, file, | |
1352 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", | |
1353 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) | |
1354 | ); | |
1355 | ||
1356 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { | |
e1ec3a88 | 1357 | const SV *namesv = pname[ix]; |
dd2155a4 | 1358 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c | 1359 | namesv = NULL; |
dd2155a4 DM |
1360 | } |
1361 | if (namesv) { | |
ee6cee0c DM |
1362 | if (SvFAKE(namesv)) |
1363 | Perl_dump_indent(aTHX_ level+1, file, | |
c0fd1b42 | 1364 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c DM |
1365 | (int) ix, |
1366 | PTR2UV(ppad[ix]), | |
1367 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
b15aece3 | 1368 | SvPVX_const(namesv), |
809abb02 NC |
1369 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1370 | (unsigned long)PARENT_PAD_INDEX(namesv) | |
b5c19bd7 | 1371 | |
ee6cee0c DM |
1372 | ); |
1373 | else | |
1374 | Perl_dump_indent(aTHX_ level+1, file, | |
809abb02 | 1375 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c DM |
1376 | (int) ix, |
1377 | PTR2UV(ppad[ix]), | |
1378 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), | |
809abb02 NC |
1379 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1380 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), | |
b15aece3 | 1381 | SvPVX_const(namesv) |
ee6cee0c | 1382 | ); |
dd2155a4 DM |
1383 | } |
1384 | else if (full) { | |
1385 | Perl_dump_indent(aTHX_ level+1, file, | |
1386 | "%2d. 0x%"UVxf"<%lu>\n", | |
1387 | (int) ix, | |
1388 | PTR2UV(ppad[ix]), | |
1389 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) | |
1390 | ); | |
1391 | } | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | ||
1396 | ||
1397 | /* | |
1398 | =for apidoc cv_dump | |
1399 | ||
1400 | dump the contents of a CV | |
1401 | ||
1402 | =cut | |
1403 | */ | |
1404 | ||
1405 | #ifdef DEBUGGING | |
1406 | STATIC void | |
e1ec3a88 | 1407 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 | 1408 | { |
97aff369 | 1409 | dVAR; |
53c1dcc0 AL |
1410 | const CV * const outside = CvOUTSIDE(cv); |
1411 | AV* const padlist = CvPADLIST(cv); | |
dd2155a4 | 1412 | |
7918f24d NC |
1413 | PERL_ARGS_ASSERT_CV_DUMP; |
1414 | ||
dd2155a4 DM |
1415 | PerlIO_printf(Perl_debug_log, |
1416 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", | |
1417 | title, | |
1418 | PTR2UV(cv), | |
1419 | (CvANON(cv) ? "ANON" | |
71f882da | 1420 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 DM |
1421 | : (cv == PL_main_cv) ? "MAIN" |
1422 | : CvUNIQUE(cv) ? "UNIQUE" | |
1423 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), | |
1424 | PTR2UV(outside), | |
1425 | (!outside ? "null" | |
1426 | : CvANON(outside) ? "ANON" | |
1427 | : (outside == PL_main_cv) ? "MAIN" | |
1428 | : CvUNIQUE(outside) ? "UNIQUE" | |
1429 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); | |
1430 | ||
1431 | PerlIO_printf(Perl_debug_log, | |
1432 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); | |
1433 | do_dump_pad(1, Perl_debug_log, padlist, 1); | |
1434 | } | |
1435 | #endif /* DEBUGGING */ | |
1436 | ||
1437 | ||
1438 | ||
1439 | ||
1440 | ||
1441 | /* | |
1442 | =for apidoc cv_clone | |
1443 | ||
1444 | Clone a CV: make a new CV which points to the same code etc, but which | |
1445 | has a newly-created pad built by copying the prototype pad and capturing | |
1446 | any outer lexicals. | |
1447 | ||
1448 | =cut | |
1449 | */ | |
1450 | ||
1451 | CV * | |
1452 | Perl_cv_clone(pTHX_ CV *proto) | |
1453 | { | |
27da23d5 | 1454 | dVAR; |
dd2155a4 | 1455 | I32 ix; |
53c1dcc0 AL |
1456 | AV* const protopadlist = CvPADLIST(proto); |
1457 | const AV* const protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE); | |
1458 | const AV* const protopad = (AV*)*av_fetch(protopadlist, 1, FALSE); | |
1459 | SV** const pname = AvARRAY(protopad_name); | |
1460 | SV** const ppad = AvARRAY(protopad); | |
e1ec3a88 AL |
1461 | const I32 fname = AvFILLp(protopad_name); |
1462 | const I32 fpad = AvFILLp(protopad); | |
dd2155a4 | 1463 | CV* cv; |
b5c19bd7 DM |
1464 | SV** outpad; |
1465 | CV* outside; | |
71f882da | 1466 | long depth; |
dd2155a4 | 1467 | |
7918f24d NC |
1468 | PERL_ARGS_ASSERT_CV_CLONE; |
1469 | ||
dd2155a4 DM |
1470 | assert(!CvUNIQUE(proto)); |
1471 | ||
71f882da DM |
1472 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1473 | * to a prototype; we instead want the cloned parent who called us. | |
1474 | * Note that in general for formats, CvOUTSIDE != find_runcv */ | |
1475 | ||
1476 | outside = CvOUTSIDE(proto); | |
1477 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) | |
1478 | outside = find_runcv(NULL); | |
1479 | depth = CvDEPTH(outside); | |
1480 | assert(depth || SvTYPE(proto) == SVt_PVFM); | |
1481 | if (!depth) | |
1482 | depth = 1; | |
b5c19bd7 DM |
1483 | assert(CvPADLIST(outside)); |
1484 | ||
dd2155a4 DM |
1485 | ENTER; |
1486 | SAVESPTR(PL_compcv); | |
1487 | ||
b9f83d2f | 1488 | cv = PL_compcv = (CV*)newSV_type(SvTYPE(proto)); |
7dafbf52 | 1489 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE); |
dd2155a4 DM |
1490 | CvCLONED_on(cv); |
1491 | ||
dd2155a4 | 1492 | #ifdef USE_ITHREADS |
aed2304a NC |
1493 | CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto) |
1494 | : savepv(CvFILE(proto)); | |
dd2155a4 DM |
1495 | #else |
1496 | CvFILE(cv) = CvFILE(proto); | |
1497 | #endif | |
1498 | CvGV(cv) = CvGV(proto); | |
1499 | CvSTASH(cv) = CvSTASH(proto); | |
b34c0dd4 | 1500 | OP_REFCNT_LOCK; |
dd2155a4 | 1501 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 | 1502 | OP_REFCNT_UNLOCK; |
dd2155a4 | 1503 | CvSTART(cv) = CvSTART(proto); |
b37c2d43 | 1504 | CvOUTSIDE(cv) = (CV*)SvREFCNT_inc_simple(outside); |
b5c19bd7 | 1505 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 DM |
1506 | |
1507 | if (SvPOK(proto)) | |
b15aece3 | 1508 | sv_setpvn((SV*)cv, SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 | 1509 | |
b7787f18 | 1510 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 | 1511 | |
b5c19bd7 | 1512 | av_fill(PL_comppad, fpad); |
dd2155a4 DM |
1513 | for (ix = fname; ix >= 0; ix--) |
1514 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); | |
1515 | ||
dd2155a4 DM |
1516 | PL_curpad = AvARRAY(PL_comppad); |
1517 | ||
71f882da | 1518 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 | 1519 | |
dd2155a4 | 1520 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c SS |
1521 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1522 | SV *sv = NULL; | |
71f882da | 1523 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 | 1524 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 | 1525 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da | 1526 | assert(sv); |
33894c1a DM |
1527 | /* formats may have an inactive parent, |
1528 | while my $x if $false can leave an active var marked as | |
d1186544 DM |
1529 | stale. And state vars are always available */ |
1530 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { | |
71f882da DM |
1531 | if (ckWARN(WARN_CLOSURE)) |
1532 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), | |
b15aece3 | 1533 | "Variable \"%s\" is not available", SvPVX_const(namesv)); |
a0714e2c | 1534 | sv = NULL; |
71f882da | 1535 | } |
33894c1a | 1536 | else |
f84c484e | 1537 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 | 1538 | } |
71f882da | 1539 | if (!sv) { |
b15aece3 | 1540 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 | 1541 | if (sigil == '&') |
dd2155a4 | 1542 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 | 1543 | else if (sigil == '@') |
dd2155a4 | 1544 | sv = (SV*)newAV(); |
e1ec3a88 | 1545 | else if (sigil == '%') |
dd2155a4 DM |
1546 | sv = (SV*)newHV(); |
1547 | else | |
561b68a9 | 1548 | sv = newSV(0); |
235cc2e3 | 1549 | SvPADMY_on(sv); |
0d3b281c DM |
1550 | /* reset the 'assign only once' flag on each state var */ |
1551 | if (SvPAD_STATE(namesv)) | |
1552 | SvPADSTALE_on(sv); | |
dd2155a4 DM |
1553 | } |
1554 | } | |
1555 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { | |
f84c484e | 1556 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 DM |
1557 | } |
1558 | else { | |
561b68a9 | 1559 | sv = newSV(0); |
dd2155a4 | 1560 | SvPADTMP_on(sv); |
dd2155a4 | 1561 | } |
71f882da | 1562 | PL_curpad[ix] = sv; |
dd2155a4 DM |
1563 | } |
1564 | ||
dd2155a4 DM |
1565 | DEBUG_Xv( |
1566 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); | |
1567 | cv_dump(outside, "Outside"); | |
1568 | cv_dump(proto, "Proto"); | |
1569 | cv_dump(cv, "To"); | |
1570 | ); | |
1571 | ||
1572 | LEAVE; | |
1573 | ||
1574 | if (CvCONST(cv)) { | |
b5c19bd7 DM |
1575 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1576 | * The prototype was marked as a candiate for const-ization, | |
1577 | * so try to grab the current const value, and if successful, | |
1578 | * turn into a const sub: | |
1579 | */ | |
551405c4 | 1580 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 DM |
1581 | if (const_sv) { |
1582 | SvREFCNT_dec(cv); | |
bd61b366 | 1583 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 DM |
1584 | } |
1585 | else { | |
1586 | CvCONST_off(cv); | |
1587 | } | |
dd2155a4 DM |
1588 | } |
1589 | ||
1590 | return cv; | |
1591 | } | |
1592 | ||
1593 | ||
1594 | /* | |
1595 | =for apidoc pad_fixup_inner_anons | |
1596 | ||
1597 | For any anon CVs in the pad, change CvOUTSIDE of that CV from | |
7dafbf52 DM |
1598 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1599 | moved to a pre-existing CV struct. | |
dd2155a4 DM |
1600 | |
1601 | =cut | |
1602 | */ | |
1603 | ||
1604 | void | |
1605 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) | |
1606 | { | |
97aff369 | 1607 | dVAR; |
dd2155a4 | 1608 | I32 ix; |
66a1b24b AL |
1609 | AV * const comppad_name = (AV*)AvARRAY(padlist)[0]; |
1610 | AV * const comppad = (AV*)AvARRAY(padlist)[1]; | |
53c1dcc0 AL |
1611 | SV ** const namepad = AvARRAY(comppad_name); |
1612 | SV ** const curpad = AvARRAY(comppad); | |
7918f24d NC |
1613 | |
1614 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; | |
294a48e9 AL |
1615 | PERL_UNUSED_ARG(old_cv); |
1616 | ||
dd2155a4 | 1617 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 | 1618 | const SV * const namesv = namepad[ix]; |
dd2155a4 | 1619 | if (namesv && namesv != &PL_sv_undef |
b15aece3 | 1620 | && *SvPVX_const(namesv) == '&') |
dd2155a4 | 1621 | { |
46c461b5 | 1622 | CV * const innercv = (CV*)curpad[ix]; |
7dafbf52 DM |
1623 | assert(CvWEAKOUTSIDE(innercv)); |
1624 | assert(CvOUTSIDE(innercv) == old_cv); | |
1625 | CvOUTSIDE(innercv) = new_cv; | |
dd2155a4 DM |
1626 | } |
1627 | } | |
1628 | } | |
1629 | ||
7dafbf52 | 1630 | |
dd2155a4 DM |
1631 | /* |
1632 | =for apidoc pad_push | |
1633 | ||
1634 | Push a new pad frame onto the padlist, unless there's already a pad at | |
26019298 AL |
1635 | this depth, in which case don't bother creating a new one. Then give |
1636 | the new pad an @_ in slot zero. | |
dd2155a4 DM |
1637 | |
1638 | =cut | |
1639 | */ | |
1640 | ||
1641 | void | |
26019298 | 1642 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 | 1643 | { |
97aff369 | 1644 | dVAR; |
7918f24d NC |
1645 | |
1646 | PERL_ARGS_ASSERT_PAD_PUSH; | |
1647 | ||
b37c2d43 | 1648 | if (depth > AvFILLp(padlist)) { |
44f8325f AL |
1649 | SV** const svp = AvARRAY(padlist); |
1650 | AV* const newpad = newAV(); | |
1651 | SV** const oldpad = AvARRAY(svp[depth-1]); | |
dd2155a4 | 1652 | I32 ix = AvFILLp((AV*)svp[1]); |
e1ec3a88 | 1653 | const I32 names_fill = AvFILLp((AV*)svp[0]); |
44f8325f | 1654 | SV** const names = AvARRAY(svp[0]); |
26019298 AL |
1655 | AV *av; |
1656 | ||
dd2155a4 DM |
1657 | for ( ;ix > 0; ix--) { |
1658 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { | |
b15aece3 | 1659 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 RGS |
1660 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
1661 | || (SvFLAGS(names[ix]) & SVpad_STATE) | |
1662 | || sigil == '&') | |
1663 | { | |
dd2155a4 DM |
1664 | /* outer lexical or anon code */ |
1665 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); | |
1666 | } | |
1667 | else { /* our own lexical */ | |
26019298 AL |
1668 | SV *sv; |
1669 | if (sigil == '@') | |
1670 | sv = (SV*)newAV(); | |
1671 | else if (sigil == '%') | |
1672 | sv = (SV*)newHV(); | |
dd2155a4 | 1673 | else |
561b68a9 | 1674 | sv = newSV(0); |
26019298 | 1675 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1676 | SvPADMY_on(sv); |
1677 | } | |
1678 | } | |
1679 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { | |
f84c484e | 1680 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 DM |
1681 | } |
1682 | else { | |
1683 | /* save temporaries on recursion? */ | |
561b68a9 | 1684 | SV * const sv = newSV(0); |
26019298 | 1685 | av_store(newpad, ix, sv); |
dd2155a4 DM |
1686 | SvPADTMP_on(sv); |
1687 | } | |
1688 | } | |
26019298 AL |
1689 | av = newAV(); |
1690 | av_extend(av, 0); | |
1691 | av_store(newpad, 0, (SV*)av); | |
11ca45c0 | 1692 | AvREIFY_only(av); |
26019298 | 1693 | |
dd2155a4 DM |
1694 | av_store(padlist, depth, (SV*)newpad); |
1695 | AvFILLp(padlist) = depth; | |
1696 | } | |
1697 | } | |
b21dc031 AL |
1698 | |
1699 | ||
1700 | HV * | |
1701 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) | |
1702 | { | |
97aff369 | 1703 | dVAR; |
551405c4 | 1704 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f | 1705 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 AL |
1706 | return SvSTASH(*av); |
1707 | } | |
5c284bb0 | 1708 | return NULL; |
b21dc031 | 1709 | } |
66610fdd RGS |
1710 | |
1711 | /* | |
1712 | * Local variables: | |
1713 | * c-indentation-style: bsd | |
1714 | * c-basic-offset: 4 | |
1715 | * indent-tabs-mode: t | |
1716 | * End: | |
1717 | * | |
37442d52 RGS |
1718 | * ex: set ts=8 sts=4 sw=4 noet: |
1719 | */ |