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