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dd2155a4 |
1 | /* pad.c |
2 | * |
1129b882 |
3 | * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | * by Larry Wall and others |
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5 | * |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. |
4ac71550 |
8 | */ |
9 | |
10 | /* |
11 | * 'Anyway: there was this Mr. Frodo left an orphan and stranded, as you |
12 | * might say, among those queer Bucklanders, being brought up anyhow in |
13 | * Brandy Hall. A regular warren, by all accounts. Old Master Gorbadoc |
14 | * never had fewer than a couple of hundred relations in the place. |
15 | * Mr. Bilbo never did a kinder deed than when he brought the lad back |
16 | * to live among decent folk.' --the Gaffer |
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17 | * |
4ac71550 |
18 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
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19 | */ |
20 | |
21 | /* XXX DAPM |
22 | * As of Sept 2002, this file is new and may be in a state of flux for |
23 | * a while. I've marked things I intent to come back and look at further |
24 | * with an 'XXX DAPM' comment. |
25 | */ |
26 | |
27 | /* |
28 | =head1 Pad Data Structures |
29 | |
61296642 |
30 | This file contains the functions that create and manipulate scratchpads, |
166f8a29 |
31 | which are array-of-array data structures attached to a CV (ie a sub) |
61296642 |
32 | and which store lexical variables and opcode temporary and per-thread |
166f8a29 |
33 | values. |
34 | |
dd2155a4 |
35 | =for apidoc m|AV *|CvPADLIST|CV *cv |
36 | CV's can have CvPADLIST(cv) set to point to an AV. |
37 | |
38 | For these purposes "forms" are a kind-of CV, eval""s are too (except they're |
39 | not callable at will and are always thrown away after the eval"" is done |
b5c19bd7 |
40 | executing). Require'd files are simply evals without any outer lexical |
41 | scope. |
dd2155a4 |
42 | |
43 | XSUBs don't have CvPADLIST set - dXSTARG fetches values from PL_curpad, |
44 | but that is really the callers pad (a slot of which is allocated by |
45 | every entersub). |
46 | |
47 | The CvPADLIST AV has does not have AvREAL set, so REFCNT of component items |
f3548bdc |
48 | is managed "manual" (mostly in pad.c) rather than normal av.c rules. |
dd2155a4 |
49 | The items in the AV are not SVs as for a normal AV, but other AVs: |
50 | |
51 | 0'th Entry of the CvPADLIST is an AV which represents the "names" or rather |
52 | the "static type information" for lexicals. |
53 | |
54 | The CvDEPTH'th entry of CvPADLIST AV is an AV which is the stack frame at that |
55 | depth of recursion into the CV. |
56 | The 0'th slot of a frame AV is an AV which is @_. |
57 | other entries are storage for variables and op targets. |
58 | |
59 | During compilation: |
a6d05634 |
60 | C<PL_comppad_name> is set to the names AV. |
61 | C<PL_comppad> is set to the frame AV for the frame CvDEPTH == 1. |
62 | C<PL_curpad> is set to the body of the frame AV (i.e. AvARRAY(PL_comppad)). |
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63 | |
f3548bdc |
64 | During execution, C<PL_comppad> and C<PL_curpad> refer to the live |
65 | frame of the currently executing sub. |
66 | |
67 | Iterating over the names AV iterates over all possible pad |
dd2155a4 |
68 | items. Pad slots that are SVs_PADTMP (targets/GVs/constants) end up having |
69 | &PL_sv_undef "names" (see pad_alloc()). |
70 | |
71 | Only my/our variable (SVs_PADMY/SVs_PADOUR) slots get valid names. |
72 | The rest are op targets/GVs/constants which are statically allocated |
73 | or resolved at compile time. These don't have names by which they |
74 | can be looked up from Perl code at run time through eval"" like |
75 | my/our variables can be. Since they can't be looked up by "name" |
76 | but only by their index allocated at compile time (which is usually |
77 | in PL_op->op_targ), wasting a name SV for them doesn't make sense. |
78 | |
79 | The SVs in the names AV have their PV being the name of the variable. |
3441fb63 |
80 | xlow+1..xhigh inclusive in the NV union is a range of cop_seq numbers for |
81 | which the name is valid. For typed lexicals name SV is SVt_PVMG and SvSTASH |
82 | points at the type. For C<our> lexicals, the type is also SVt_PVMG, with the |
73d95100 |
83 | SvOURSTASH slot pointing at the stash of the associated global (so that |
931b58fb |
84 | duplicate C<our> declarations in the same package can be detected). SvUVX is |
3441fb63 |
85 | sometimes hijacked to store the generation number during compilation. |
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86 | |
b5c19bd7 |
87 | If SvFAKE is set on the name SV, then that slot in the frame AV is |
88 | a REFCNT'ed reference to a lexical from "outside". In this case, |
3441fb63 |
89 | the name SV does not use xlow and xhigh to store a cop_seq range, since it is |
90 | in scope throughout. Instead xhigh stores some flags containing info about |
b5c19bd7 |
91 | the real lexical (is it declared in an anon, and is it capable of being |
3441fb63 |
92 | instantiated multiple times?), and for fake ANONs, xlow contains the index |
b5c19bd7 |
93 | within the parent's pad where the lexical's value is stored, to make |
94 | cloning quicker. |
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95 | |
a6d05634 |
96 | If the 'name' is '&' the corresponding entry in frame AV |
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97 | is a CV representing a possible closure. |
98 | (SvFAKE and name of '&' is not a meaningful combination currently but could |
99 | become so if C<my sub foo {}> is implemented.) |
100 | |
71f882da |
101 | Note that formats are treated as anon subs, and are cloned each time |
102 | write is called (if necessary). |
103 | |
e6e7068b |
104 | The flag SVf_PADSTALE is cleared on lexicals each time the my() is executed, |
105 | and set on scope exit. This allows the 'Variable $x is not available' warning |
106 | to be generated in evals, such as |
107 | |
108 | { my $x = 1; sub f { eval '$x'} } f(); |
109 | |
d1186544 |
110 | For state vars, SVf_PADSTALE is overloaded to mean 'not yet initialised' |
111 | |
dd2155a4 |
112 | =cut |
113 | */ |
114 | |
115 | |
116 | #include "EXTERN.h" |
117 | #define PERL_IN_PAD_C |
118 | #include "perl.h" |
952306ac |
119 | #include "keywords.h" |
dd2155a4 |
120 | |
3441fb63 |
121 | #define COP_SEQ_RANGE_LOW_set(sv,val) \ |
122 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END |
123 | #define COP_SEQ_RANGE_HIGH_set(sv,val) \ |
124 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END |
809abb02 |
125 | |
3441fb63 |
126 | #define PARENT_PAD_INDEX_set(sv,val) \ |
127 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xlow = (val); } STMT_END |
128 | #define PARENT_FAKELEX_FLAGS_set(sv,val) \ |
129 | STMT_START { ((XPVNV*)SvANY(sv))->xnv_u.xpad_cop_seq.xhigh = (val); } STMT_END |
dd2155a4 |
130 | |
c8185ac5 |
131 | #define PAD_MAX I32_MAX |
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132 | |
1dba731d |
133 | #ifdef PERL_MAD |
134 | void pad_peg(const char* s) { |
135 | static int pegcnt; |
7918f24d |
136 | |
137 | PERL_ARGS_ASSERT_PAD_PEG; |
138 | |
1dba731d |
139 | pegcnt++; |
140 | } |
141 | #endif |
dd2155a4 |
142 | |
143 | /* |
144 | =for apidoc pad_new |
145 | |
146 | Create a new compiling padlist, saving and updating the various global |
147 | vars at the same time as creating the pad itself. The following flags |
148 | can be OR'ed together: |
149 | |
150 | padnew_CLONE this pad is for a cloned CV |
151 | padnew_SAVE save old globals |
152 | padnew_SAVESUB also save extra stuff for start of sub |
153 | |
154 | =cut |
155 | */ |
156 | |
157 | PADLIST * |
c7c737cb |
158 | Perl_pad_new(pTHX_ int flags) |
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159 | { |
97aff369 |
160 | dVAR; |
e1ec3a88 |
161 | AV *padlist, *padname, *pad; |
dd2155a4 |
162 | |
f3548bdc |
163 | ASSERT_CURPAD_LEGAL("pad_new"); |
164 | |
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165 | /* XXX DAPM really need a new SAVEt_PAD which restores all or most |
166 | * vars (based on flags) rather than storing vals + addresses for |
167 | * each individually. Also see pad_block_start. |
168 | * XXX DAPM Try to see whether all these conditionals are required |
169 | */ |
170 | |
171 | /* save existing state, ... */ |
172 | |
173 | if (flags & padnew_SAVE) { |
3979c56f |
174 | SAVECOMPPAD(); |
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175 | SAVESPTR(PL_comppad_name); |
176 | if (! (flags & padnew_CLONE)) { |
177 | SAVEI32(PL_padix); |
178 | SAVEI32(PL_comppad_name_fill); |
179 | SAVEI32(PL_min_intro_pending); |
180 | SAVEI32(PL_max_intro_pending); |
8bbe96d7 |
181 | SAVEBOOL(PL_cv_has_eval); |
dd2155a4 |
182 | if (flags & padnew_SAVESUB) { |
f0cb02e3 |
183 | SAVEBOOL(PL_pad_reset_pending); |
dd2155a4 |
184 | } |
185 | } |
186 | } |
187 | /* XXX DAPM interestingly, PL_comppad_name_floor never seems to be |
188 | * saved - check at some pt that this is okay */ |
189 | |
190 | /* ... create new pad ... */ |
191 | |
192 | padlist = newAV(); |
193 | padname = newAV(); |
194 | pad = newAV(); |
195 | |
196 | if (flags & padnew_CLONE) { |
197 | /* XXX DAPM I dont know why cv_clone needs it |
198 | * doing differently yet - perhaps this separate branch can be |
199 | * dispensed with eventually ??? |
200 | */ |
201 | |
e1ec3a88 |
202 | AV * const a0 = newAV(); /* will be @_ */ |
dd2155a4 |
203 | av_extend(a0, 0); |
ad64d0ec |
204 | av_store(pad, 0, MUTABLE_SV(a0)); |
11ca45c0 |
205 | AvREIFY_only(a0); |
dd2155a4 |
206 | } |
207 | else { |
a0714e2c |
208 | av_store(pad, 0, NULL); |
dd2155a4 |
209 | } |
210 | |
211 | AvREAL_off(padlist); |
ad64d0ec |
212 | av_store(padlist, 0, MUTABLE_SV(padname)); |
213 | av_store(padlist, 1, MUTABLE_SV(pad)); |
dd2155a4 |
214 | |
215 | /* ... then update state variables */ |
216 | |
502c6561 |
217 | PL_comppad_name = MUTABLE_AV((*av_fetch(padlist, 0, FALSE))); |
218 | PL_comppad = MUTABLE_AV((*av_fetch(padlist, 1, FALSE))); |
dd2155a4 |
219 | PL_curpad = AvARRAY(PL_comppad); |
220 | |
221 | if (! (flags & padnew_CLONE)) { |
222 | PL_comppad_name_fill = 0; |
223 | PL_min_intro_pending = 0; |
224 | PL_padix = 0; |
b5c19bd7 |
225 | PL_cv_has_eval = 0; |
dd2155a4 |
226 | } |
227 | |
228 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
b5c19bd7 |
229 | "Pad 0x%"UVxf"[0x%"UVxf"] new: compcv=0x%"UVxf |
dd2155a4 |
230 | " name=0x%"UVxf" flags=0x%"UVxf"\n", |
b5c19bd7 |
231 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), PTR2UV(PL_compcv), |
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232 | PTR2UV(padname), (UV)flags |
233 | ) |
234 | ); |
235 | |
236 | return (PADLIST*)padlist; |
237 | } |
238 | |
239 | /* |
240 | =for apidoc pad_undef |
241 | |
242 | Free the padlist associated with a CV. |
243 | If parts of it happen to be current, we null the relevant |
244 | PL_*pad* global vars so that we don't have any dangling references left. |
245 | We also repoint the CvOUTSIDE of any about-to-be-orphaned |
a3985cdc |
246 | inner subs to the outer of this cv. |
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247 | |
7dafbf52 |
248 | (This function should really be called pad_free, but the name was already |
249 | taken) |
250 | |
dd2155a4 |
251 | =cut |
252 | */ |
253 | |
254 | void |
a3985cdc |
255 | Perl_pad_undef(pTHX_ CV* cv) |
dd2155a4 |
256 | { |
97aff369 |
257 | dVAR; |
dd2155a4 |
258 | I32 ix; |
b64e5050 |
259 | const PADLIST * const padlist = CvPADLIST(cv); |
dd2155a4 |
260 | |
7918f24d |
261 | PERL_ARGS_ASSERT_PAD_UNDEF; |
262 | |
1dba731d |
263 | pad_peg("pad_undef"); |
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264 | if (!padlist) |
265 | return; |
0565a181 |
266 | if (SvIS_FREED(padlist)) /* may be during global destruction */ |
dd2155a4 |
267 | return; |
268 | |
269 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
503de470 |
270 | "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n", |
271 | PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad)) |
dd2155a4 |
272 | ); |
273 | |
7dafbf52 |
274 | /* detach any '&' anon children in the pad; if afterwards they |
275 | * are still live, fix up their CvOUTSIDEs to point to our outside, |
276 | * bypassing us. */ |
277 | /* XXX DAPM for efficiency, we should only do this if we know we have |
278 | * children, or integrate this loop with general cleanup */ |
dd2155a4 |
279 | |
7dafbf52 |
280 | if (!PL_dirty) { /* don't bother during global destruction */ |
53c1dcc0 |
281 | CV * const outercv = CvOUTSIDE(cv); |
e1ec3a88 |
282 | const U32 seq = CvOUTSIDE_SEQ(cv); |
502c6561 |
283 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
53c1dcc0 |
284 | SV ** const namepad = AvARRAY(comppad_name); |
502c6561 |
285 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); |
53c1dcc0 |
286 | SV ** const curpad = AvARRAY(comppad); |
dd2155a4 |
287 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
504618e9 |
288 | SV * const namesv = namepad[ix]; |
dd2155a4 |
289 | if (namesv && namesv != &PL_sv_undef |
b15aece3 |
290 | && *SvPVX_const(namesv) == '&') |
dd2155a4 |
291 | { |
ea726b52 |
292 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
10dc53a8 |
293 | U32 inner_rc = SvREFCNT(innercv); |
294 | assert(inner_rc); |
a0714e2c |
295 | namepad[ix] = NULL; |
7dafbf52 |
296 | SvREFCNT_dec(namesv); |
01773faa |
297 | |
298 | if (SvREFCNT(comppad) < 2) { /* allow for /(?{ sub{} })/ */ |
a0714e2c |
299 | curpad[ix] = NULL; |
01773faa |
300 | SvREFCNT_dec(innercv); |
10dc53a8 |
301 | inner_rc--; |
01773faa |
302 | } |
b37c2d43 |
303 | |
304 | /* in use, not just a prototype */ |
305 | if (inner_rc && (CvOUTSIDE(innercv) == cv)) { |
7dafbf52 |
306 | assert(CvWEAKOUTSIDE(innercv)); |
9d1ce744 |
307 | /* don't relink to grandfather if he's being freed */ |
308 | if (outercv && SvREFCNT(outercv)) { |
309 | CvWEAKOUTSIDE_off(innercv); |
310 | CvOUTSIDE(innercv) = outercv; |
311 | CvOUTSIDE_SEQ(innercv) = seq; |
f84c484e |
312 | SvREFCNT_inc_simple_void_NN(outercv); |
9d1ce744 |
313 | } |
314 | else { |
601f1833 |
315 | CvOUTSIDE(innercv) = NULL; |
9d1ce744 |
316 | } |
dd2155a4 |
317 | } |
318 | } |
319 | } |
320 | } |
7dafbf52 |
321 | |
dd2155a4 |
322 | ix = AvFILLp(padlist); |
323 | while (ix >= 0) { |
5fe77bf8 |
324 | SV* const sv = AvARRAY(padlist)[ix--]; |
b37c2d43 |
325 | if (sv) { |
ad64d0ec |
326 | if (sv == (const SV *)PL_comppad_name) |
b37c2d43 |
327 | PL_comppad_name = NULL; |
ad64d0ec |
328 | else if (sv == (const SV *)PL_comppad) { |
b37c2d43 |
329 | PL_comppad = NULL; |
330 | PL_curpad = NULL; |
331 | } |
dd2155a4 |
332 | } |
333 | SvREFCNT_dec(sv); |
334 | } |
ad64d0ec |
335 | SvREFCNT_dec(MUTABLE_SV(CvPADLIST(cv))); |
4608196e |
336 | CvPADLIST(cv) = NULL; |
dd2155a4 |
337 | } |
338 | |
339 | |
340 | |
341 | |
342 | /* |
343 | =for apidoc pad_add_name |
344 | |
b5c19bd7 |
345 | Create a new name and associated PADMY SV in the current pad; return the |
346 | offset. |
dd2155a4 |
347 | If C<typestash> is valid, the name is for a typed lexical; set the |
348 | name's stash to that value. |
349 | If C<ourstash> is valid, it's an our lexical, set the name's |
73d95100 |
350 | SvOURSTASH to that value |
dd2155a4 |
351 | |
dd2155a4 |
352 | If fake, it means we're cloning an existing entry |
353 | |
354 | =cut |
355 | */ |
356 | |
dd2155a4 |
357 | PADOFFSET |
cca43f78 |
358 | Perl_pad_add_name(pTHX_ const char *name, const STRLEN len, const U32 flags, |
359 | HV *typestash, HV *ourstash) |
dd2155a4 |
360 | { |
97aff369 |
361 | dVAR; |
504618e9 |
362 | const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY); |
cca43f78 |
363 | SV *namesv; |
dd2155a4 |
364 | |
7918f24d |
365 | PERL_ARGS_ASSERT_PAD_ADD_NAME; |
366 | |
f3548bdc |
367 | ASSERT_CURPAD_ACTIVE("pad_add_name"); |
368 | |
cca43f78 |
369 | if (flags & ~(pad_add_STATE|pad_add_FAKE)) |
370 | Perl_croak(aTHX_ "panic: pad_add_name illegal flag bits 0x%" UVxf, |
371 | (UV)flags); |
372 | |
373 | namesv = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV); |
374 | |
375 | /* Until we're using the length for real, cross check that we're being told |
376 | the truth. */ |
377 | PERL_UNUSED_ARG(len); |
378 | assert(strlen(name) == len); |
379 | |
dd2155a4 |
380 | sv_setpv(namesv, name); |
381 | |
382 | if (typestash) { |
63f10712 |
383 | assert(SvTYPE(namesv) == SVt_PVMG); |
00b1698f |
384 | SvPAD_TYPED_on(namesv); |
ad64d0ec |
385 | SvSTASH_set(namesv, MUTABLE_HV(SvREFCNT_inc_simple_NN(MUTABLE_SV(typestash)))); |
dd2155a4 |
386 | } |
387 | if (ourstash) { |
00b1698f |
388 | SvPAD_OUR_on(namesv); |
73d95100 |
389 | SvOURSTASH_set(namesv, ourstash); |
f84c484e |
390 | SvREFCNT_inc_simple_void_NN(ourstash); |
dd2155a4 |
391 | } |
cca43f78 |
392 | else if (flags & pad_add_STATE) { |
952306ac |
393 | SvPAD_STATE_on(namesv); |
394 | } |
dd2155a4 |
395 | |
396 | av_store(PL_comppad_name, offset, namesv); |
cca43f78 |
397 | if (flags & pad_add_FAKE) { |
dd2155a4 |
398 | SvFAKE_on(namesv); |
b5c19bd7 |
399 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
400 | "Pad addname: %ld \"%s\" FAKE\n", (long)offset, name)); |
401 | } |
dd2155a4 |
402 | else { |
ee6cee0c |
403 | /* not yet introduced */ |
809abb02 |
404 | COP_SEQ_RANGE_LOW_set(namesv, PAD_MAX); /* min */ |
405 | COP_SEQ_RANGE_HIGH_set(namesv, 0); /* max */ |
ee6cee0c |
406 | |
dd2155a4 |
407 | if (!PL_min_intro_pending) |
408 | PL_min_intro_pending = offset; |
409 | PL_max_intro_pending = offset; |
b5c19bd7 |
410 | /* if it's not a simple scalar, replace with an AV or HV */ |
f3548bdc |
411 | /* XXX DAPM since slot has been allocated, replace |
412 | * av_store with PL_curpad[offset] ? */ |
dd2155a4 |
413 | if (*name == '@') |
ad64d0ec |
414 | av_store(PL_comppad, offset, MUTABLE_SV(newAV())); |
dd2155a4 |
415 | else if (*name == '%') |
ad64d0ec |
416 | av_store(PL_comppad, offset, MUTABLE_SV(newHV())); |
dd2155a4 |
417 | SvPADMY_on(PL_curpad[offset]); |
b5c19bd7 |
418 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
419 | "Pad addname: %ld \"%s\" new lex=0x%"UVxf"\n", |
420 | (long)offset, name, PTR2UV(PL_curpad[offset]))); |
dd2155a4 |
421 | } |
422 | |
423 | return offset; |
424 | } |
425 | |
426 | |
427 | |
428 | |
429 | /* |
430 | =for apidoc pad_alloc |
431 | |
432 | Allocate a new my or tmp pad entry. For a my, simply push a null SV onto |
433 | the end of PL_comppad, but for a tmp, scan the pad from PL_padix upwards |
cf525c36 |
434 | for a slot which has no name and no active value. |
dd2155a4 |
435 | |
436 | =cut |
437 | */ |
438 | |
439 | /* XXX DAPM integrate alloc(), add_name() and add_anon(), |
440 | * or at least rationalise ??? */ |
6d640399 |
441 | /* And flag whether the incoming name is UTF8 or 8 bit? |
442 | Could do this either with the +ve/-ve hack of the HV code, or expanding |
443 | the flag bits. Either way, this makes proper Unicode safe pad support. |
6d640399 |
444 | NWC |
445 | */ |
dd2155a4 |
446 | |
447 | PADOFFSET |
448 | Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype) |
449 | { |
97aff369 |
450 | dVAR; |
dd2155a4 |
451 | SV *sv; |
452 | I32 retval; |
453 | |
6136c704 |
454 | PERL_UNUSED_ARG(optype); |
f3548bdc |
455 | ASSERT_CURPAD_ACTIVE("pad_alloc"); |
456 | |
dd2155a4 |
457 | if (AvARRAY(PL_comppad) != PL_curpad) |
458 | Perl_croak(aTHX_ "panic: pad_alloc"); |
459 | if (PL_pad_reset_pending) |
460 | pad_reset(); |
461 | if (tmptype & SVs_PADMY) { |
235cc2e3 |
462 | sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE); |
dd2155a4 |
463 | retval = AvFILLp(PL_comppad); |
464 | } |
465 | else { |
551405c4 |
466 | SV * const * const names = AvARRAY(PL_comppad_name); |
e1ec3a88 |
467 | const SSize_t names_fill = AvFILLp(PL_comppad_name); |
dd2155a4 |
468 | for (;;) { |
469 | /* |
470 | * "foreach" index vars temporarily become aliases to non-"my" |
471 | * values. Thus we must skip, not just pad values that are |
472 | * marked as current pad values, but also those with names. |
473 | */ |
474 | /* HVDS why copy to sv here? we don't seem to use it */ |
475 | if (++PL_padix <= names_fill && |
476 | (sv = names[PL_padix]) && sv != &PL_sv_undef) |
477 | continue; |
478 | sv = *av_fetch(PL_comppad, PL_padix, TRUE); |
479 | if (!(SvFLAGS(sv) & (SVs_PADTMP | SVs_PADMY)) && |
480 | !IS_PADGV(sv) && !IS_PADCONST(sv)) |
481 | break; |
482 | } |
483 | retval = PL_padix; |
484 | } |
485 | SvFLAGS(sv) |= tmptype; |
486 | PL_curpad = AvARRAY(PL_comppad); |
487 | |
488 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
489 | "Pad 0x%"UVxf"[0x%"UVxf"] alloc: %ld for %s\n", |
490 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long) retval, |
491 | PL_op_name[optype])); |
fd0854ff |
492 | #ifdef DEBUG_LEAKING_SCALARS |
493 | sv->sv_debug_optype = optype; |
494 | sv->sv_debug_inpad = 1; |
fd0854ff |
495 | #endif |
a212c8b5 |
496 | return (PADOFFSET)retval; |
dd2155a4 |
497 | } |
498 | |
499 | /* |
500 | =for apidoc pad_add_anon |
501 | |
502 | Add an anon code entry to the current compiling pad |
503 | |
504 | =cut |
505 | */ |
506 | |
507 | PADOFFSET |
508 | Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type) |
509 | { |
97aff369 |
510 | dVAR; |
dd2155a4 |
511 | PADOFFSET ix; |
b9f83d2f |
512 | SV* const name = newSV_type(SVt_PVNV); |
7918f24d |
513 | |
514 | PERL_ARGS_ASSERT_PAD_ADD_ANON; |
515 | |
1dba731d |
516 | pad_peg("add_anon"); |
76f68e9b |
517 | sv_setpvs(name, "&"); |
809abb02 |
518 | /* Are these two actually ever read? */ |
519 | COP_SEQ_RANGE_HIGH_set(name, ~0); |
520 | COP_SEQ_RANGE_LOW_set(name, 1); |
dd2155a4 |
521 | ix = pad_alloc(op_type, SVs_PADMY); |
522 | av_store(PL_comppad_name, ix, name); |
f3548bdc |
523 | /* XXX DAPM use PL_curpad[] ? */ |
dd2155a4 |
524 | av_store(PL_comppad, ix, sv); |
525 | SvPADMY_on(sv); |
7dafbf52 |
526 | |
527 | /* to avoid ref loops, we never have parent + child referencing each |
528 | * other simultaneously */ |
ea726b52 |
529 | if (CvOUTSIDE((const CV *)sv)) { |
530 | assert(!CvWEAKOUTSIDE((const CV *)sv)); |
531 | CvWEAKOUTSIDE_on(MUTABLE_CV(sv)); |
532 | SvREFCNT_dec(CvOUTSIDE(MUTABLE_CV(sv))); |
7dafbf52 |
533 | } |
dd2155a4 |
534 | return ix; |
535 | } |
536 | |
537 | |
538 | |
539 | /* |
540 | =for apidoc pad_check_dup |
541 | |
542 | Check for duplicate declarations: report any of: |
543 | * a my in the current scope with the same name; |
544 | * an our (anywhere in the pad) with the same name and the same stash |
545 | as C<ourstash> |
546 | C<is_our> indicates that the name to check is an 'our' declaration |
547 | |
548 | =cut |
549 | */ |
550 | |
551 | /* XXX DAPM integrate this into pad_add_name ??? */ |
552 | |
553 | void |
35f82371 |
554 | Perl_pad_check_dup(pTHX_ const char *name, const STRLEN len, const U32 flags, |
555 | const HV *ourstash) |
dd2155a4 |
556 | { |
97aff369 |
557 | dVAR; |
53c1dcc0 |
558 | SV **svp; |
dd2155a4 |
559 | PADOFFSET top, off; |
35f82371 |
560 | const U32 is_our = flags & pad_add_OUR; |
dd2155a4 |
561 | |
7918f24d |
562 | PERL_ARGS_ASSERT_PAD_CHECK_DUP; |
563 | |
f3548bdc |
564 | ASSERT_CURPAD_ACTIVE("pad_check_dup"); |
35f82371 |
565 | |
566 | if (flags & ~pad_add_OUR) |
567 | Perl_croak(aTHX_ "panic: pad_check_dup illegal flag bits 0x%" UVxf, |
568 | (UV)flags); |
569 | |
570 | /* Until we're using the length for real, cross check that we're being told |
571 | the truth. */ |
572 | PERL_UNUSED_ARG(len); |
573 | assert(strlen(name) == len); |
574 | |
041457d9 |
575 | if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC)) |
dd2155a4 |
576 | return; /* nothing to check */ |
577 | |
578 | svp = AvARRAY(PL_comppad_name); |
579 | top = AvFILLp(PL_comppad_name); |
580 | /* check the current scope */ |
581 | /* XXX DAPM - why the (I32) cast - shouldn't we ensure they're the same |
582 | * type ? */ |
583 | for (off = top; (I32)off > PL_comppad_name_floor; off--) { |
53c1dcc0 |
584 | SV * const sv = svp[off]; |
585 | if (sv |
dd2155a4 |
586 | && sv != &PL_sv_undef |
ee6cee0c |
587 | && !SvFAKE(sv) |
809abb02 |
588 | && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0) |
b15aece3 |
589 | && strEQ(name, SvPVX_const(sv))) |
dd2155a4 |
590 | { |
00b1698f |
591 | if (is_our && (SvPAD_OUR(sv))) |
7f73a9f1 |
592 | break; /* "our" masking "our" */ |
dd2155a4 |
593 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 |
594 | "\"%s\" variable %"SVf" masks earlier declaration in same %s", |
12bd6ede |
595 | (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"), |
c541b9b4 |
596 | sv, |
809abb02 |
597 | (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX ? "scope" : "statement")); |
dd2155a4 |
598 | --off; |
599 | break; |
600 | } |
601 | } |
602 | /* check the rest of the pad */ |
603 | if (is_our) { |
604 | do { |
53c1dcc0 |
605 | SV * const sv = svp[off]; |
606 | if (sv |
dd2155a4 |
607 | && sv != &PL_sv_undef |
ee6cee0c |
608 | && !SvFAKE(sv) |
809abb02 |
609 | && (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX || COP_SEQ_RANGE_HIGH(sv) == 0) |
73d95100 |
610 | && SvOURSTASH(sv) == ourstash |
b15aece3 |
611 | && strEQ(name, SvPVX_const(sv))) |
dd2155a4 |
612 | { |
613 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
c541b9b4 |
614 | "\"our\" variable %"SVf" redeclared", sv); |
624f69f5 |
615 | if ((I32)off <= PL_comppad_name_floor) |
7f73a9f1 |
616 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
617 | "\t(Did you mean \"local\" instead of \"our\"?)\n"); |
dd2155a4 |
618 | break; |
619 | } |
620 | } while ( off-- > 0 ); |
621 | } |
622 | } |
623 | |
624 | |
dd2155a4 |
625 | /* |
626 | =for apidoc pad_findmy |
627 | |
628 | Given a lexical name, try to find its offset, first in the current pad, |
629 | or failing that, in the pads of any lexically enclosing subs (including |
630 | the complications introduced by eval). If the name is found in an outer pad, |
631 | then a fake entry is added to the current pad. |
632 | Returns the offset in the current pad, or NOT_IN_PAD on failure. |
633 | |
634 | =cut |
635 | */ |
636 | |
637 | PADOFFSET |
f8f98e0a |
638 | Perl_pad_findmy(pTHX_ const char *name, STRLEN len, U32 flags) |
dd2155a4 |
639 | { |
97aff369 |
640 | dVAR; |
b5c19bd7 |
641 | SV *out_sv; |
642 | int out_flags; |
929a0744 |
643 | I32 offset; |
e1ec3a88 |
644 | const AV *nameav; |
929a0744 |
645 | SV **name_svp; |
dd2155a4 |
646 | |
7918f24d |
647 | PERL_ARGS_ASSERT_PAD_FINDMY; |
648 | |
1dba731d |
649 | pad_peg("pad_findmy"); |
f8f98e0a |
650 | |
651 | if (flags) |
652 | Perl_croak(aTHX_ "panic: pad_findmy illegal flag bits 0x%" UVxf, |
653 | (UV)flags); |
654 | |
655 | /* Yes, it is a bug (read work in progress) that we're not really using this |
656 | length parameter, and instead relying on strlen() later on. But I'm not |
657 | comfortable about changing the pad API piecemeal to use and rely on |
658 | lengths. This only exists to avoid an "unused parameter" warning. */ |
659 | if (len < 2) |
660 | return NOT_IN_PAD; |
661 | |
662 | /* But until we're using the length for real, cross check that we're being |
663 | told the truth. */ |
664 | assert(strlen(name) == len); |
665 | |
9f7d9405 |
666 | offset = pad_findlex(name, PL_compcv, PL_cop_seqmax, 1, |
4608196e |
667 | NULL, &out_sv, &out_flags); |
9f7d9405 |
668 | if ((PADOFFSET)offset != NOT_IN_PAD) |
929a0744 |
669 | return offset; |
670 | |
671 | /* look for an our that's being introduced; this allows |
672 | * our $foo = 0 unless defined $foo; |
673 | * to not give a warning. (Yes, this is a hack) */ |
674 | |
502c6561 |
675 | nameav = MUTABLE_AV(AvARRAY(CvPADLIST(PL_compcv))[0]); |
929a0744 |
676 | name_svp = AvARRAY(nameav); |
677 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 |
678 | const SV * const namesv = name_svp[offset]; |
929a0744 |
679 | if (namesv && namesv != &PL_sv_undef |
680 | && !SvFAKE(namesv) |
00b1698f |
681 | && (SvPAD_OUR(namesv)) |
b15aece3 |
682 | && strEQ(SvPVX_const(namesv), name) |
809abb02 |
683 | && COP_SEQ_RANGE_LOW(namesv) == PAD_MAX /* min */ |
929a0744 |
684 | ) |
685 | return offset; |
686 | } |
687 | return NOT_IN_PAD; |
dd2155a4 |
688 | } |
689 | |
e1f795dc |
690 | /* |
691 | * Returns the offset of a lexical $_, if there is one, at run time. |
692 | * Used by the UNDERBAR XS macro. |
693 | */ |
694 | |
695 | PADOFFSET |
29289021 |
696 | Perl_find_rundefsvoffset(pTHX) |
e1f795dc |
697 | { |
97aff369 |
698 | dVAR; |
e1f795dc |
699 | SV *out_sv; |
700 | int out_flags; |
701 | return pad_findlex("$_", find_runcv(NULL), PL_curcop->cop_seq, 1, |
4608196e |
702 | NULL, &out_sv, &out_flags); |
e1f795dc |
703 | } |
dd2155a4 |
704 | |
dd2155a4 |
705 | /* |
706 | =for apidoc pad_findlex |
707 | |
708 | Find a named lexical anywhere in a chain of nested pads. Add fake entries |
b5c19bd7 |
709 | in the inner pads if it's found in an outer one. |
710 | |
711 | Returns the offset in the bottom pad of the lex or the fake lex. |
712 | cv is the CV in which to start the search, and seq is the current cop_seq |
713 | to match against. If warn is true, print appropriate warnings. The out_* |
714 | vars return values, and so are pointers to where the returned values |
715 | should be stored. out_capture, if non-null, requests that the innermost |
716 | instance of the lexical is captured; out_name_sv is set to the innermost |
717 | matched namesv or fake namesv; out_flags returns the flags normally |
718 | associated with the IVX field of a fake namesv. |
719 | |
720 | Note that pad_findlex() is recursive; it recurses up the chain of CVs, |
721 | then comes back down, adding fake entries as it goes. It has to be this way |
3441fb63 |
722 | because fake namesvs in anon protoypes have to store in xlow the index into |
b5c19bd7 |
723 | the parent pad. |
dd2155a4 |
724 | |
725 | =cut |
726 | */ |
727 | |
b5c19bd7 |
728 | /* the CV has finished being compiled. This is not a sufficient test for |
729 | * all CVs (eg XSUBs), but suffices for the CVs found in a lexical chain */ |
730 | #define CvCOMPILED(cv) CvROOT(cv) |
731 | |
71f882da |
732 | /* the CV does late binding of its lexicals */ |
733 | #define CvLATE(cv) (CvANON(cv) || SvTYPE(cv) == SVt_PVFM) |
734 | |
b5c19bd7 |
735 | |
dd2155a4 |
736 | STATIC PADOFFSET |
e1ec3a88 |
737 | S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn, |
b5c19bd7 |
738 | SV** out_capture, SV** out_name_sv, int *out_flags) |
dd2155a4 |
739 | { |
97aff369 |
740 | dVAR; |
b5c19bd7 |
741 | I32 offset, new_offset; |
742 | SV *new_capture; |
743 | SV **new_capturep; |
b64e5050 |
744 | const AV * const padlist = CvPADLIST(cv); |
dd2155a4 |
745 | |
7918f24d |
746 | PERL_ARGS_ASSERT_PAD_FINDLEX; |
747 | |
b5c19bd7 |
748 | *out_flags = 0; |
a3985cdc |
749 | |
b5c19bd7 |
750 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
751 | "Pad findlex cv=0x%"UVxf" searching \"%s\" seq=%d%s\n", |
752 | PTR2UV(cv), name, (int)seq, out_capture ? " capturing" : "" )); |
dd2155a4 |
753 | |
b5c19bd7 |
754 | /* first, search this pad */ |
dd2155a4 |
755 | |
b5c19bd7 |
756 | if (padlist) { /* not an undef CV */ |
757 | I32 fake_offset = 0; |
502c6561 |
758 | const AV * const nameav = MUTABLE_AV(AvARRAY(padlist)[0]); |
551405c4 |
759 | SV * const * const name_svp = AvARRAY(nameav); |
ee6cee0c |
760 | |
b5c19bd7 |
761 | for (offset = AvFILLp(nameav); offset > 0; offset--) { |
551405c4 |
762 | const SV * const namesv = name_svp[offset]; |
b5c19bd7 |
763 | if (namesv && namesv != &PL_sv_undef |
b15aece3 |
764 | && strEQ(SvPVX_const(namesv), name)) |
b5c19bd7 |
765 | { |
766 | if (SvFAKE(namesv)) |
767 | fake_offset = offset; /* in case we don't find a real one */ |
809abb02 |
768 | else if ( seq > COP_SEQ_RANGE_LOW(namesv) /* min */ |
769 | && seq <= COP_SEQ_RANGE_HIGH(namesv)) /* max */ |
b5c19bd7 |
770 | break; |
ee6cee0c |
771 | } |
772 | } |
773 | |
b5c19bd7 |
774 | if (offset > 0 || fake_offset > 0 ) { /* a match! */ |
775 | if (offset > 0) { /* not fake */ |
776 | fake_offset = 0; |
777 | *out_name_sv = name_svp[offset]; /* return the namesv */ |
778 | |
779 | /* set PAD_FAKELEX_MULTI if this lex can have multiple |
780 | * instances. For now, we just test !CvUNIQUE(cv), but |
781 | * ideally, we should detect my's declared within loops |
782 | * etc - this would allow a wider range of 'not stayed |
783 | * shared' warnings. We also treated alreadly-compiled |
784 | * lexes as not multi as viewed from evals. */ |
785 | |
786 | *out_flags = CvANON(cv) ? |
787 | PAD_FAKELEX_ANON : |
788 | (!CvUNIQUE(cv) && ! CvCOMPILED(cv)) |
789 | ? PAD_FAKELEX_MULTI : 0; |
790 | |
791 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 |
792 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld (%lu,%lu)\n", |
793 | PTR2UV(cv), (long)offset, |
794 | (unsigned long)COP_SEQ_RANGE_LOW(*out_name_sv), |
795 | (unsigned long)COP_SEQ_RANGE_HIGH(*out_name_sv))); |
b5c19bd7 |
796 | } |
797 | else { /* fake match */ |
798 | offset = fake_offset; |
799 | *out_name_sv = name_svp[offset]; /* return the namesv */ |
809abb02 |
800 | *out_flags = PARENT_FAKELEX_FLAGS(*out_name_sv); |
b5c19bd7 |
801 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
19a5c512 |
802 | "Pad findlex cv=0x%"UVxf" matched: offset=%ld flags=0x%lx index=%lu\n", |
b5c19bd7 |
803 | PTR2UV(cv), (long)offset, (unsigned long)*out_flags, |
809abb02 |
804 | (unsigned long) PARENT_PAD_INDEX(*out_name_sv) |
b5c19bd7 |
805 | )); |
806 | } |
dd2155a4 |
807 | |
b5c19bd7 |
808 | /* return the lex? */ |
dd2155a4 |
809 | |
b5c19bd7 |
810 | if (out_capture) { |
dd2155a4 |
811 | |
b5c19bd7 |
812 | /* our ? */ |
00b1698f |
813 | if (SvPAD_OUR(*out_name_sv)) { |
a0714e2c |
814 | *out_capture = NULL; |
b5c19bd7 |
815 | return offset; |
816 | } |
ee6cee0c |
817 | |
b5c19bd7 |
818 | /* trying to capture from an anon prototype? */ |
819 | if (CvCOMPILED(cv) |
820 | ? CvANON(cv) && CvCLONE(cv) && !CvCLONED(cv) |
821 | : *out_flags & PAD_FAKELEX_ANON) |
822 | { |
a2a5de95 |
823 | if (warn) |
824 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
825 | "Variable \"%s\" is not available", name); |
a0714e2c |
826 | *out_capture = NULL; |
b5c19bd7 |
827 | } |
ee6cee0c |
828 | |
b5c19bd7 |
829 | /* real value */ |
830 | else { |
831 | int newwarn = warn; |
832 | if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI) |
d1186544 |
833 | && !SvPAD_STATE(name_svp[offset]) |
b5c19bd7 |
834 | && warn && ckWARN(WARN_CLOSURE)) { |
835 | newwarn = 0; |
836 | Perl_warner(aTHX_ packWARN(WARN_CLOSURE), |
837 | "Variable \"%s\" will not stay shared", name); |
838 | } |
dd2155a4 |
839 | |
b5c19bd7 |
840 | if (fake_offset && CvANON(cv) |
841 | && CvCLONE(cv) &&!CvCLONED(cv)) |
842 | { |
843 | SV *n; |
844 | /* not yet caught - look further up */ |
845 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
846 | "Pad findlex cv=0x%"UVxf" chasing lex in outer pad\n", |
847 | PTR2UV(cv))); |
848 | n = *out_name_sv; |
282e1742 |
849 | (void) pad_findlex(name, CvOUTSIDE(cv), |
850 | CvOUTSIDE_SEQ(cv), |
b5c19bd7 |
851 | newwarn, out_capture, out_name_sv, out_flags); |
852 | *out_name_sv = n; |
853 | return offset; |
dd2155a4 |
854 | } |
b5c19bd7 |
855 | |
502c6561 |
856 | *out_capture = AvARRAY(MUTABLE_AV(AvARRAY(padlist)[ |
857 | CvDEPTH(cv) ? CvDEPTH(cv) : 1]))[offset]; |
b5c19bd7 |
858 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
859 | "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n", |
19a5c512 |
860 | PTR2UV(cv), PTR2UV(*out_capture))); |
b5c19bd7 |
861 | |
d1186544 |
862 | if (SvPADSTALE(*out_capture) |
863 | && !SvPAD_STATE(name_svp[offset])) |
864 | { |
a2a5de95 |
865 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
866 | "Variable \"%s\" is not available", name); |
a0714e2c |
867 | *out_capture = NULL; |
dd2155a4 |
868 | } |
869 | } |
b5c19bd7 |
870 | if (!*out_capture) { |
871 | if (*name == '@') |
ad64d0ec |
872 | *out_capture = sv_2mortal(MUTABLE_SV(newAV())); |
b5c19bd7 |
873 | else if (*name == '%') |
ad64d0ec |
874 | *out_capture = sv_2mortal(MUTABLE_SV(newHV())); |
b5c19bd7 |
875 | else |
876 | *out_capture = sv_newmortal(); |
877 | } |
dd2155a4 |
878 | } |
b5c19bd7 |
879 | |
880 | return offset; |
ee6cee0c |
881 | } |
b5c19bd7 |
882 | } |
883 | |
884 | /* it's not in this pad - try above */ |
885 | |
886 | if (!CvOUTSIDE(cv)) |
887 | return NOT_IN_PAD; |
9f7d9405 |
888 | |
b5c19bd7 |
889 | /* out_capture non-null means caller wants us to capture lex; in |
71f882da |
890 | * addition we capture ourselves unless it's an ANON/format */ |
b5c19bd7 |
891 | new_capturep = out_capture ? out_capture : |
4608196e |
892 | CvLATE(cv) ? NULL : &new_capture; |
b5c19bd7 |
893 | |
894 | offset = pad_findlex(name, CvOUTSIDE(cv), CvOUTSIDE_SEQ(cv), 1, |
895 | new_capturep, out_name_sv, out_flags); |
9f7d9405 |
896 | if ((PADOFFSET)offset == NOT_IN_PAD) |
b5c19bd7 |
897 | return NOT_IN_PAD; |
9f7d9405 |
898 | |
b5c19bd7 |
899 | /* found in an outer CV. Add appropriate fake entry to this pad */ |
900 | |
901 | /* don't add new fake entries (via eval) to CVs that we have already |
902 | * finished compiling, or to undef CVs */ |
903 | if (CvCOMPILED(cv) || !padlist) |
904 | return 0; /* this dummy (and invalid) value isnt used by the caller */ |
905 | |
906 | { |
907 | SV *new_namesv; |
53c1dcc0 |
908 | AV * const ocomppad_name = PL_comppad_name; |
909 | PAD * const ocomppad = PL_comppad; |
502c6561 |
910 | PL_comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
911 | PL_comppad = MUTABLE_AV(AvARRAY(padlist)[1]); |
b5c19bd7 |
912 | PL_curpad = AvARRAY(PL_comppad); |
913 | |
914 | new_offset = pad_add_name( |
b15aece3 |
915 | SvPVX_const(*out_name_sv), |
cca43f78 |
916 | SvCUR(*out_name_sv), |
917 | /* state variable ? */ |
918 | pad_add_FAKE | (SvPAD_STATE(*out_name_sv) ? pad_add_STATE : 0), |
00b1698f |
919 | SvPAD_TYPED(*out_name_sv) |
5c284bb0 |
920 | ? SvSTASH(*out_name_sv) : NULL, |
cca43f78 |
921 | SvOURSTASH(*out_name_sv) |
b5c19bd7 |
922 | ); |
923 | |
924 | new_namesv = AvARRAY(PL_comppad_name)[new_offset]; |
809abb02 |
925 | PARENT_FAKELEX_FLAGS_set(new_namesv, *out_flags); |
b5c19bd7 |
926 | |
809abb02 |
927 | PARENT_PAD_INDEX_set(new_namesv, 0); |
00b1698f |
928 | if (SvPAD_OUR(new_namesv)) { |
6f207bd3 |
929 | NOOP; /* do nothing */ |
b5c19bd7 |
930 | } |
71f882da |
931 | else if (CvLATE(cv)) { |
b5c19bd7 |
932 | /* delayed creation - just note the offset within parent pad */ |
809abb02 |
933 | PARENT_PAD_INDEX_set(new_namesv, offset); |
b5c19bd7 |
934 | CvCLONE_on(cv); |
935 | } |
936 | else { |
937 | /* immediate creation - capture outer value right now */ |
938 | av_store(PL_comppad, new_offset, SvREFCNT_inc(*new_capturep)); |
939 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
940 | "Pad findlex cv=0x%"UVxf" saved captured sv 0x%"UVxf" at offset %ld\n", |
941 | PTR2UV(cv), PTR2UV(*new_capturep), (long)new_offset)); |
dd2155a4 |
942 | } |
b5c19bd7 |
943 | *out_name_sv = new_namesv; |
809abb02 |
944 | *out_flags = PARENT_FAKELEX_FLAGS(new_namesv); |
b5c19bd7 |
945 | |
946 | PL_comppad_name = ocomppad_name; |
947 | PL_comppad = ocomppad; |
4608196e |
948 | PL_curpad = ocomppad ? AvARRAY(ocomppad) : NULL; |
dd2155a4 |
949 | } |
b5c19bd7 |
950 | return new_offset; |
dd2155a4 |
951 | } |
952 | |
fb8a9836 |
953 | |
954 | #ifdef DEBUGGING |
dd2155a4 |
955 | /* |
956 | =for apidoc pad_sv |
957 | |
958 | Get the value at offset po in the current pad. |
959 | Use macro PAD_SV instead of calling this function directly. |
960 | |
961 | =cut |
962 | */ |
963 | |
964 | |
965 | SV * |
966 | Perl_pad_sv(pTHX_ PADOFFSET po) |
967 | { |
97aff369 |
968 | dVAR; |
f3548bdc |
969 | ASSERT_CURPAD_ACTIVE("pad_sv"); |
dd2155a4 |
970 | |
dd2155a4 |
971 | if (!po) |
972 | Perl_croak(aTHX_ "panic: pad_sv po"); |
dd2155a4 |
973 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
974 | "Pad 0x%"UVxf"[0x%"UVxf"] sv: %ld sv=0x%"UVxf"\n", |
f3548bdc |
975 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(PL_curpad[po])) |
dd2155a4 |
976 | ); |
977 | return PL_curpad[po]; |
978 | } |
979 | |
980 | |
981 | /* |
982 | =for apidoc pad_setsv |
983 | |
984 | Set the entry at offset po in the current pad to sv. |
985 | Use the macro PAD_SETSV() rather than calling this function directly. |
986 | |
987 | =cut |
988 | */ |
989 | |
dd2155a4 |
990 | void |
991 | Perl_pad_setsv(pTHX_ PADOFFSET po, SV* sv) |
992 | { |
97aff369 |
993 | dVAR; |
7918f24d |
994 | |
995 | PERL_ARGS_ASSERT_PAD_SETSV; |
996 | |
f3548bdc |
997 | ASSERT_CURPAD_ACTIVE("pad_setsv"); |
dd2155a4 |
998 | |
999 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1000 | "Pad 0x%"UVxf"[0x%"UVxf"] setsv: %ld sv=0x%"UVxf"\n", |
f3548bdc |
1001 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po, PTR2UV(sv)) |
dd2155a4 |
1002 | ); |
1003 | PL_curpad[po] = sv; |
1004 | } |
1005 | #endif |
1006 | |
1007 | |
1008 | |
1009 | /* |
1010 | =for apidoc pad_block_start |
1011 | |
1012 | Update the pad compilation state variables on entry to a new block |
1013 | |
1014 | =cut |
1015 | */ |
1016 | |
1017 | /* XXX DAPM perhaps: |
1018 | * - integrate this in general state-saving routine ??? |
1019 | * - combine with the state-saving going on in pad_new ??? |
1020 | * - introduce a new SAVE type that does all this in one go ? |
1021 | */ |
1022 | |
1023 | void |
1024 | Perl_pad_block_start(pTHX_ int full) |
1025 | { |
97aff369 |
1026 | dVAR; |
f3548bdc |
1027 | ASSERT_CURPAD_ACTIVE("pad_block_start"); |
dd2155a4 |
1028 | SAVEI32(PL_comppad_name_floor); |
1029 | PL_comppad_name_floor = AvFILLp(PL_comppad_name); |
1030 | if (full) |
1031 | PL_comppad_name_fill = PL_comppad_name_floor; |
1032 | if (PL_comppad_name_floor < 0) |
1033 | PL_comppad_name_floor = 0; |
1034 | SAVEI32(PL_min_intro_pending); |
1035 | SAVEI32(PL_max_intro_pending); |
1036 | PL_min_intro_pending = 0; |
1037 | SAVEI32(PL_comppad_name_fill); |
1038 | SAVEI32(PL_padix_floor); |
1039 | PL_padix_floor = PL_padix; |
1040 | PL_pad_reset_pending = FALSE; |
1041 | } |
1042 | |
1043 | |
1044 | /* |
1045 | =for apidoc intro_my |
1046 | |
1047 | "Introduce" my variables to visible status. |
1048 | |
1049 | =cut |
1050 | */ |
1051 | |
1052 | U32 |
1053 | Perl_intro_my(pTHX) |
1054 | { |
97aff369 |
1055 | dVAR; |
dd2155a4 |
1056 | SV **svp; |
dd2155a4 |
1057 | I32 i; |
1058 | |
f3548bdc |
1059 | ASSERT_CURPAD_ACTIVE("intro_my"); |
dd2155a4 |
1060 | if (! PL_min_intro_pending) |
1061 | return PL_cop_seqmax; |
1062 | |
1063 | svp = AvARRAY(PL_comppad_name); |
1064 | for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) { |
53c1dcc0 |
1065 | SV * const sv = svp[i]; |
1066 | |
809abb02 |
1067 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && !COP_SEQ_RANGE_HIGH(sv)) { |
1068 | COP_SEQ_RANGE_HIGH_set(sv, PAD_MAX); /* Don't know scope end yet. */ |
1069 | COP_SEQ_RANGE_LOW_set(sv, PL_cop_seqmax); |
dd2155a4 |
1070 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 |
1071 | "Pad intromy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 |
1072 | (long)i, SvPVX_const(sv), |
809abb02 |
1073 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1074 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) |
dd2155a4 |
1075 | ); |
1076 | } |
1077 | } |
1078 | PL_min_intro_pending = 0; |
1079 | PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */ |
1080 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1081 | "Pad intromy: seq -> %ld\n", (long)(PL_cop_seqmax+1))); |
1082 | |
1083 | return PL_cop_seqmax++; |
1084 | } |
1085 | |
1086 | /* |
1087 | =for apidoc pad_leavemy |
1088 | |
1089 | Cleanup at end of scope during compilation: set the max seq number for |
1090 | lexicals in this scope and warn of any lexicals that never got introduced. |
1091 | |
1092 | =cut |
1093 | */ |
1094 | |
1095 | void |
1096 | Perl_pad_leavemy(pTHX) |
1097 | { |
97aff369 |
1098 | dVAR; |
dd2155a4 |
1099 | I32 off; |
551405c4 |
1100 | SV * const * const svp = AvARRAY(PL_comppad_name); |
dd2155a4 |
1101 | |
1102 | PL_pad_reset_pending = FALSE; |
1103 | |
f3548bdc |
1104 | ASSERT_CURPAD_ACTIVE("pad_leavemy"); |
dd2155a4 |
1105 | if (PL_min_intro_pending && PL_comppad_name_fill < PL_min_intro_pending) { |
1106 | for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) { |
53c1dcc0 |
1107 | const SV * const sv = svp[off]; |
9b387841 |
1108 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv)) |
1109 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1110 | "%"SVf" never introduced", |
1111 | SVfARG(sv)); |
dd2155a4 |
1112 | } |
1113 | } |
1114 | /* "Deintroduce" my variables that are leaving with this scope. */ |
1115 | for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_fill; off--) { |
53c1dcc0 |
1116 | const SV * const sv = svp[off]; |
809abb02 |
1117 | if (sv && sv != &PL_sv_undef && !SvFAKE(sv) && COP_SEQ_RANGE_HIGH(sv) == PAD_MAX) { |
1118 | COP_SEQ_RANGE_HIGH_set(sv, PL_cop_seqmax); |
dd2155a4 |
1119 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
809abb02 |
1120 | "Pad leavemy: %ld \"%s\", (%lu,%lu)\n", |
b15aece3 |
1121 | (long)off, SvPVX_const(sv), |
809abb02 |
1122 | (unsigned long)COP_SEQ_RANGE_LOW(sv), |
1123 | (unsigned long)COP_SEQ_RANGE_HIGH(sv)) |
dd2155a4 |
1124 | ); |
1125 | } |
1126 | } |
1127 | PL_cop_seqmax++; |
1128 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1129 | "Pad leavemy: seq = %ld\n", (long)PL_cop_seqmax)); |
1130 | } |
1131 | |
1132 | |
1133 | /* |
1134 | =for apidoc pad_swipe |
1135 | |
1136 | Abandon the tmp in the current pad at offset po and replace with a |
1137 | new one. |
1138 | |
1139 | =cut |
1140 | */ |
1141 | |
1142 | void |
1143 | Perl_pad_swipe(pTHX_ PADOFFSET po, bool refadjust) |
1144 | { |
97aff369 |
1145 | dVAR; |
f3548bdc |
1146 | ASSERT_CURPAD_LEGAL("pad_swipe"); |
dd2155a4 |
1147 | if (!PL_curpad) |
1148 | return; |
1149 | if (AvARRAY(PL_comppad) != PL_curpad) |
1150 | Perl_croak(aTHX_ "panic: pad_swipe curpad"); |
1151 | if (!po) |
1152 | Perl_croak(aTHX_ "panic: pad_swipe po"); |
1153 | |
1154 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1155 | "Pad 0x%"UVxf"[0x%"UVxf"] swipe: %ld\n", |
1156 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po)); |
1157 | |
1158 | if (PL_curpad[po]) |
1159 | SvPADTMP_off(PL_curpad[po]); |
1160 | if (refadjust) |
1161 | SvREFCNT_dec(PL_curpad[po]); |
1162 | |
9ad9869c |
1163 | |
1164 | /* if pad tmps aren't shared between ops, then there's no need to |
1165 | * create a new tmp when an existing op is freed */ |
1166 | #ifdef USE_BROKEN_PAD_RESET |
561b68a9 |
1167 | PL_curpad[po] = newSV(0); |
dd2155a4 |
1168 | SvPADTMP_on(PL_curpad[po]); |
9ad9869c |
1169 | #else |
1170 | PL_curpad[po] = &PL_sv_undef; |
97bf4a8d |
1171 | #endif |
dd2155a4 |
1172 | if ((I32)po < PL_padix) |
1173 | PL_padix = po - 1; |
1174 | } |
1175 | |
1176 | |
1177 | /* |
1178 | =for apidoc pad_reset |
1179 | |
1180 | Mark all the current temporaries for reuse |
1181 | |
1182 | =cut |
1183 | */ |
1184 | |
1185 | /* XXX pad_reset() is currently disabled because it results in serious bugs. |
1186 | * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed |
1187 | * on the stack by OPs that use them, there are several ways to get an alias |
1188 | * to a shared TARG. Such an alias will change randomly and unpredictably. |
1189 | * We avoid doing this until we can think of a Better Way. |
1190 | * GSAR 97-10-29 */ |
1f676739 |
1191 | static void |
82af08ae |
1192 | S_pad_reset(pTHX) |
dd2155a4 |
1193 | { |
97aff369 |
1194 | dVAR; |
dd2155a4 |
1195 | #ifdef USE_BROKEN_PAD_RESET |
dd2155a4 |
1196 | if (AvARRAY(PL_comppad) != PL_curpad) |
1197 | Perl_croak(aTHX_ "panic: pad_reset curpad"); |
1198 | |
1199 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1200 | "Pad 0x%"UVxf"[0x%"UVxf"] reset: padix %ld -> %ld", |
1201 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), |
1202 | (long)PL_padix, (long)PL_padix_floor |
1203 | ) |
1204 | ); |
1205 | |
1206 | if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */ |
e1ec3a88 |
1207 | register I32 po; |
dd2155a4 |
1208 | for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) { |
1209 | if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po])) |
1210 | SvPADTMP_off(PL_curpad[po]); |
1211 | } |
1212 | PL_padix = PL_padix_floor; |
1213 | } |
1214 | #endif |
1215 | PL_pad_reset_pending = FALSE; |
1216 | } |
1217 | |
1218 | |
1219 | /* |
1220 | =for apidoc pad_tidy |
1221 | |
1222 | Tidy up a pad after we've finished compiling it: |
1223 | * remove most stuff from the pads of anonsub prototypes; |
1224 | * give it a @_; |
1225 | * mark tmps as such. |
1226 | |
1227 | =cut |
1228 | */ |
1229 | |
1230 | /* XXX DAPM surely most of this stuff should be done properly |
1231 | * at the right time beforehand, rather than going around afterwards |
1232 | * cleaning up our mistakes ??? |
1233 | */ |
1234 | |
1235 | void |
1236 | Perl_pad_tidy(pTHX_ padtidy_type type) |
1237 | { |
27da23d5 |
1238 | dVAR; |
dd2155a4 |
1239 | |
f3548bdc |
1240 | ASSERT_CURPAD_ACTIVE("pad_tidy"); |
b5c19bd7 |
1241 | |
1242 | /* If this CV has had any 'eval-capable' ops planted in it |
1243 | * (ie it contains eval '...', //ee, /$var/ or /(?{..})/), Then any |
1244 | * anon prototypes in the chain of CVs should be marked as cloneable, |
1245 | * so that for example the eval's CV in C<< sub { eval '$x' } >> gets |
1246 | * the right CvOUTSIDE. |
1247 | * If running with -d, *any* sub may potentially have an eval |
1248 | * excuted within it. |
1249 | */ |
1250 | |
1251 | if (PL_cv_has_eval || PL_perldb) { |
e1ec3a88 |
1252 | const CV *cv; |
b5c19bd7 |
1253 | for (cv = PL_compcv ;cv; cv = CvOUTSIDE(cv)) { |
1254 | if (cv != PL_compcv && CvCOMPILED(cv)) |
1255 | break; /* no need to mark already-compiled code */ |
1256 | if (CvANON(cv)) { |
1257 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
1258 | "Pad clone on cv=0x%"UVxf"\n", PTR2UV(cv))); |
1259 | CvCLONE_on(cv); |
1260 | } |
1261 | } |
1262 | } |
1263 | |
dd2155a4 |
1264 | /* extend curpad to match namepad */ |
1265 | if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad)) |
a0714e2c |
1266 | av_store(PL_comppad_name, AvFILLp(PL_comppad), NULL); |
dd2155a4 |
1267 | |
1268 | if (type == padtidy_SUBCLONE) { |
551405c4 |
1269 | SV * const * const namep = AvARRAY(PL_comppad_name); |
504618e9 |
1270 | PADOFFSET ix; |
b5c19bd7 |
1271 | |
dd2155a4 |
1272 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1273 | SV *namesv; |
1274 | |
1275 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) |
1276 | continue; |
1277 | /* |
1278 | * The only things that a clonable function needs in its |
b5c19bd7 |
1279 | * pad are anonymous subs. |
dd2155a4 |
1280 | * The rest are created anew during cloning. |
1281 | */ |
a0714e2c |
1282 | if (!((namesv = namep[ix]) != NULL && |
dd2155a4 |
1283 | namesv != &PL_sv_undef && |
b15aece3 |
1284 | *SvPVX_const(namesv) == '&')) |
dd2155a4 |
1285 | { |
1286 | SvREFCNT_dec(PL_curpad[ix]); |
a0714e2c |
1287 | PL_curpad[ix] = NULL; |
dd2155a4 |
1288 | } |
1289 | } |
1290 | } |
1291 | else if (type == padtidy_SUB) { |
1292 | /* XXX DAPM this same bit of code keeps appearing !!! Rationalise? */ |
53c1dcc0 |
1293 | AV * const av = newAV(); /* Will be @_ */ |
dd2155a4 |
1294 | av_extend(av, 0); |
ad64d0ec |
1295 | av_store(PL_comppad, 0, MUTABLE_SV(av)); |
11ca45c0 |
1296 | AvREIFY_only(av); |
dd2155a4 |
1297 | } |
1298 | |
1299 | /* XXX DAPM rationalise these two similar branches */ |
1300 | |
1301 | if (type == padtidy_SUB) { |
504618e9 |
1302 | PADOFFSET ix; |
dd2155a4 |
1303 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1304 | if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix])) |
1305 | continue; |
1306 | if (!SvPADMY(PL_curpad[ix])) |
1307 | SvPADTMP_on(PL_curpad[ix]); |
1308 | } |
1309 | } |
1310 | else if (type == padtidy_FORMAT) { |
504618e9 |
1311 | PADOFFSET ix; |
dd2155a4 |
1312 | for (ix = AvFILLp(PL_comppad); ix > 0; ix--) { |
1313 | if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix])) |
1314 | SvPADTMP_on(PL_curpad[ix]); |
1315 | } |
1316 | } |
f3548bdc |
1317 | PL_curpad = AvARRAY(PL_comppad); |
dd2155a4 |
1318 | } |
1319 | |
1320 | |
1321 | /* |
1322 | =for apidoc pad_free |
1323 | |
8627550a |
1324 | Free the SV at offset po in the current pad. |
dd2155a4 |
1325 | |
1326 | =cut |
1327 | */ |
1328 | |
1329 | /* XXX DAPM integrate with pad_swipe ???? */ |
1330 | void |
1331 | Perl_pad_free(pTHX_ PADOFFSET po) |
1332 | { |
97aff369 |
1333 | dVAR; |
f3548bdc |
1334 | ASSERT_CURPAD_LEGAL("pad_free"); |
dd2155a4 |
1335 | if (!PL_curpad) |
1336 | return; |
1337 | if (AvARRAY(PL_comppad) != PL_curpad) |
1338 | Perl_croak(aTHX_ "panic: pad_free curpad"); |
1339 | if (!po) |
1340 | Perl_croak(aTHX_ "panic: pad_free po"); |
1341 | |
1342 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
1343 | "Pad 0x%"UVxf"[0x%"UVxf"] free: %ld\n", |
1344 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), (long)po) |
1345 | ); |
1346 | |
1347 | if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) { |
1348 | SvPADTMP_off(PL_curpad[po]); |
1349 | #ifdef USE_ITHREADS |
7e736055 |
1350 | /* SV could be a shared hash key (eg bugid #19022) */ |
ddea3ea7 |
1351 | if (!SvIsCOW(PL_curpad[po])) |
dd2155a4 |
1352 | SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */ |
dd2155a4 |
1353 | #endif |
1354 | } |
1355 | if ((I32)po < PL_padix) |
1356 | PL_padix = po - 1; |
1357 | } |
1358 | |
1359 | |
1360 | |
1361 | /* |
1362 | =for apidoc do_dump_pad |
1363 | |
1364 | Dump the contents of a padlist |
1365 | |
1366 | =cut |
1367 | */ |
1368 | |
1369 | void |
1370 | Perl_do_dump_pad(pTHX_ I32 level, PerlIO *file, PADLIST *padlist, int full) |
1371 | { |
97aff369 |
1372 | dVAR; |
e1ec3a88 |
1373 | const AV *pad_name; |
1374 | const AV *pad; |
dd2155a4 |
1375 | SV **pname; |
1376 | SV **ppad; |
dd2155a4 |
1377 | I32 ix; |
1378 | |
7918f24d |
1379 | PERL_ARGS_ASSERT_DO_DUMP_PAD; |
1380 | |
dd2155a4 |
1381 | if (!padlist) { |
1382 | return; |
1383 | } |
502c6561 |
1384 | pad_name = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 0, FALSE)); |
1385 | pad = MUTABLE_AV(*av_fetch(MUTABLE_AV(padlist), 1, FALSE)); |
dd2155a4 |
1386 | pname = AvARRAY(pad_name); |
1387 | ppad = AvARRAY(pad); |
1388 | Perl_dump_indent(aTHX_ level, file, |
1389 | "PADNAME = 0x%"UVxf"(0x%"UVxf") PAD = 0x%"UVxf"(0x%"UVxf")\n", |
1390 | PTR2UV(pad_name), PTR2UV(pname), PTR2UV(pad), PTR2UV(ppad) |
1391 | ); |
1392 | |
1393 | for (ix = 1; ix <= AvFILLp(pad_name); ix++) { |
e1ec3a88 |
1394 | const SV *namesv = pname[ix]; |
dd2155a4 |
1395 | if (namesv && namesv == &PL_sv_undef) { |
a0714e2c |
1396 | namesv = NULL; |
dd2155a4 |
1397 | } |
1398 | if (namesv) { |
ee6cee0c |
1399 | if (SvFAKE(namesv)) |
1400 | Perl_dump_indent(aTHX_ level+1, file, |
c0fd1b42 |
1401 | "%2d. 0x%"UVxf"<%lu> FAKE \"%s\" flags=0x%lx index=%lu\n", |
ee6cee0c |
1402 | (int) ix, |
1403 | PTR2UV(ppad[ix]), |
1404 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), |
b15aece3 |
1405 | SvPVX_const(namesv), |
809abb02 |
1406 | (unsigned long)PARENT_FAKELEX_FLAGS(namesv), |
1407 | (unsigned long)PARENT_PAD_INDEX(namesv) |
b5c19bd7 |
1408 | |
ee6cee0c |
1409 | ); |
1410 | else |
1411 | Perl_dump_indent(aTHX_ level+1, file, |
809abb02 |
1412 | "%2d. 0x%"UVxf"<%lu> (%lu,%lu) \"%s\"\n", |
ee6cee0c |
1413 | (int) ix, |
1414 | PTR2UV(ppad[ix]), |
1415 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0), |
809abb02 |
1416 | (unsigned long)COP_SEQ_RANGE_LOW(namesv), |
1417 | (unsigned long)COP_SEQ_RANGE_HIGH(namesv), |
b15aece3 |
1418 | SvPVX_const(namesv) |
ee6cee0c |
1419 | ); |
dd2155a4 |
1420 | } |
1421 | else if (full) { |
1422 | Perl_dump_indent(aTHX_ level+1, file, |
1423 | "%2d. 0x%"UVxf"<%lu>\n", |
1424 | (int) ix, |
1425 | PTR2UV(ppad[ix]), |
1426 | (unsigned long) (ppad[ix] ? SvREFCNT(ppad[ix]) : 0) |
1427 | ); |
1428 | } |
1429 | } |
1430 | } |
1431 | |
1432 | |
1433 | |
1434 | /* |
1435 | =for apidoc cv_dump |
1436 | |
1437 | dump the contents of a CV |
1438 | |
1439 | =cut |
1440 | */ |
1441 | |
1442 | #ifdef DEBUGGING |
1443 | STATIC void |
e1ec3a88 |
1444 | S_cv_dump(pTHX_ const CV *cv, const char *title) |
dd2155a4 |
1445 | { |
97aff369 |
1446 | dVAR; |
53c1dcc0 |
1447 | const CV * const outside = CvOUTSIDE(cv); |
1448 | AV* const padlist = CvPADLIST(cv); |
dd2155a4 |
1449 | |
7918f24d |
1450 | PERL_ARGS_ASSERT_CV_DUMP; |
1451 | |
dd2155a4 |
1452 | PerlIO_printf(Perl_debug_log, |
1453 | " %s: CV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n", |
1454 | title, |
1455 | PTR2UV(cv), |
1456 | (CvANON(cv) ? "ANON" |
71f882da |
1457 | : (SvTYPE(cv) == SVt_PVFM) ? "FORMAT" |
dd2155a4 |
1458 | : (cv == PL_main_cv) ? "MAIN" |
1459 | : CvUNIQUE(cv) ? "UNIQUE" |
1460 | : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"), |
1461 | PTR2UV(outside), |
1462 | (!outside ? "null" |
1463 | : CvANON(outside) ? "ANON" |
1464 | : (outside == PL_main_cv) ? "MAIN" |
1465 | : CvUNIQUE(outside) ? "UNIQUE" |
1466 | : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED")); |
1467 | |
1468 | PerlIO_printf(Perl_debug_log, |
1469 | " PADLIST = 0x%"UVxf"\n", PTR2UV(padlist)); |
1470 | do_dump_pad(1, Perl_debug_log, padlist, 1); |
1471 | } |
1472 | #endif /* DEBUGGING */ |
1473 | |
1474 | |
1475 | |
1476 | |
1477 | |
1478 | /* |
1479 | =for apidoc cv_clone |
1480 | |
1481 | Clone a CV: make a new CV which points to the same code etc, but which |
1482 | has a newly-created pad built by copying the prototype pad and capturing |
1483 | any outer lexicals. |
1484 | |
1485 | =cut |
1486 | */ |
1487 | |
1488 | CV * |
1489 | Perl_cv_clone(pTHX_ CV *proto) |
1490 | { |
27da23d5 |
1491 | dVAR; |
dd2155a4 |
1492 | I32 ix; |
53c1dcc0 |
1493 | AV* const protopadlist = CvPADLIST(proto); |
502c6561 |
1494 | const AV *const protopad_name = (const AV *)*av_fetch(protopadlist, 0, FALSE); |
1495 | const AV *const protopad = (const AV *)*av_fetch(protopadlist, 1, FALSE); |
53c1dcc0 |
1496 | SV** const pname = AvARRAY(protopad_name); |
1497 | SV** const ppad = AvARRAY(protopad); |
e1ec3a88 |
1498 | const I32 fname = AvFILLp(protopad_name); |
1499 | const I32 fpad = AvFILLp(protopad); |
dd2155a4 |
1500 | CV* cv; |
b5c19bd7 |
1501 | SV** outpad; |
1502 | CV* outside; |
71f882da |
1503 | long depth; |
dd2155a4 |
1504 | |
7918f24d |
1505 | PERL_ARGS_ASSERT_CV_CLONE; |
1506 | |
dd2155a4 |
1507 | assert(!CvUNIQUE(proto)); |
1508 | |
71f882da |
1509 | /* Since cloneable anon subs can be nested, CvOUTSIDE may point |
1510 | * to a prototype; we instead want the cloned parent who called us. |
1511 | * Note that in general for formats, CvOUTSIDE != find_runcv */ |
1512 | |
1513 | outside = CvOUTSIDE(proto); |
1514 | if (outside && CvCLONE(outside) && ! CvCLONED(outside)) |
1515 | outside = find_runcv(NULL); |
1516 | depth = CvDEPTH(outside); |
1517 | assert(depth || SvTYPE(proto) == SVt_PVFM); |
1518 | if (!depth) |
1519 | depth = 1; |
b5c19bd7 |
1520 | assert(CvPADLIST(outside)); |
1521 | |
dd2155a4 |
1522 | ENTER; |
1523 | SAVESPTR(PL_compcv); |
1524 | |
ea726b52 |
1525 | cv = PL_compcv = MUTABLE_CV(newSV_type(SvTYPE(proto))); |
7dafbf52 |
1526 | CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE); |
dd2155a4 |
1527 | CvCLONED_on(cv); |
1528 | |
dd2155a4 |
1529 | #ifdef USE_ITHREADS |
aed2304a |
1530 | CvFILE(cv) = CvISXSUB(proto) ? CvFILE(proto) |
1531 | : savepv(CvFILE(proto)); |
dd2155a4 |
1532 | #else |
1533 | CvFILE(cv) = CvFILE(proto); |
1534 | #endif |
1535 | CvGV(cv) = CvGV(proto); |
1536 | CvSTASH(cv) = CvSTASH(proto); |
b34c0dd4 |
1537 | OP_REFCNT_LOCK; |
dd2155a4 |
1538 | CvROOT(cv) = OpREFCNT_inc(CvROOT(proto)); |
b34c0dd4 |
1539 | OP_REFCNT_UNLOCK; |
dd2155a4 |
1540 | CvSTART(cv) = CvSTART(proto); |
ea726b52 |
1541 | CvOUTSIDE(cv) = MUTABLE_CV(SvREFCNT_inc_simple(outside)); |
b5c19bd7 |
1542 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(proto); |
dd2155a4 |
1543 | |
1544 | if (SvPOK(proto)) |
ad64d0ec |
1545 | sv_setpvn(MUTABLE_SV(cv), SvPVX_const(proto), SvCUR(proto)); |
dd2155a4 |
1546 | |
b7787f18 |
1547 | CvPADLIST(cv) = pad_new(padnew_CLONE|padnew_SAVE); |
dd2155a4 |
1548 | |
b5c19bd7 |
1549 | av_fill(PL_comppad, fpad); |
dd2155a4 |
1550 | for (ix = fname; ix >= 0; ix--) |
1551 | av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix])); |
1552 | |
dd2155a4 |
1553 | PL_curpad = AvARRAY(PL_comppad); |
1554 | |
71f882da |
1555 | outpad = AvARRAY(AvARRAY(CvPADLIST(outside))[depth]); |
b5c19bd7 |
1556 | |
dd2155a4 |
1557 | for (ix = fpad; ix > 0; ix--) { |
a0714e2c |
1558 | SV* const namesv = (ix <= fname) ? pname[ix] : NULL; |
1559 | SV *sv = NULL; |
71f882da |
1560 | if (namesv && namesv != &PL_sv_undef) { /* lexical */ |
b5c19bd7 |
1561 | if (SvFAKE(namesv)) { /* lexical from outside? */ |
809abb02 |
1562 | sv = outpad[PARENT_PAD_INDEX(namesv)]; |
71f882da |
1563 | assert(sv); |
33894c1a |
1564 | /* formats may have an inactive parent, |
1565 | while my $x if $false can leave an active var marked as |
d1186544 |
1566 | stale. And state vars are always available */ |
1567 | if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) { |
a2a5de95 |
1568 | Perl_ck_warner(aTHX_ packWARN(WARN_CLOSURE), |
1569 | "Variable \"%s\" is not available", SvPVX_const(namesv)); |
a0714e2c |
1570 | sv = NULL; |
71f882da |
1571 | } |
33894c1a |
1572 | else |
f84c484e |
1573 | SvREFCNT_inc_simple_void_NN(sv); |
dd2155a4 |
1574 | } |
71f882da |
1575 | if (!sv) { |
b15aece3 |
1576 | const char sigil = SvPVX_const(namesv)[0]; |
e1ec3a88 |
1577 | if (sigil == '&') |
dd2155a4 |
1578 | sv = SvREFCNT_inc(ppad[ix]); |
e1ec3a88 |
1579 | else if (sigil == '@') |
ad64d0ec |
1580 | sv = MUTABLE_SV(newAV()); |
e1ec3a88 |
1581 | else if (sigil == '%') |
ad64d0ec |
1582 | sv = MUTABLE_SV(newHV()); |
dd2155a4 |
1583 | else |
561b68a9 |
1584 | sv = newSV(0); |
235cc2e3 |
1585 | SvPADMY_on(sv); |
0d3b281c |
1586 | /* reset the 'assign only once' flag on each state var */ |
1587 | if (SvPAD_STATE(namesv)) |
1588 | SvPADSTALE_on(sv); |
dd2155a4 |
1589 | } |
1590 | } |
1591 | else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) { |
f84c484e |
1592 | sv = SvREFCNT_inc_NN(ppad[ix]); |
dd2155a4 |
1593 | } |
1594 | else { |
561b68a9 |
1595 | sv = newSV(0); |
dd2155a4 |
1596 | SvPADTMP_on(sv); |
dd2155a4 |
1597 | } |
71f882da |
1598 | PL_curpad[ix] = sv; |
dd2155a4 |
1599 | } |
1600 | |
dd2155a4 |
1601 | DEBUG_Xv( |
1602 | PerlIO_printf(Perl_debug_log, "\nPad CV clone\n"); |
1603 | cv_dump(outside, "Outside"); |
1604 | cv_dump(proto, "Proto"); |
1605 | cv_dump(cv, "To"); |
1606 | ); |
1607 | |
1608 | LEAVE; |
1609 | |
1610 | if (CvCONST(cv)) { |
b5c19bd7 |
1611 | /* Constant sub () { $x } closing over $x - see lib/constant.pm: |
1612 | * The prototype was marked as a candiate for const-ization, |
1613 | * so try to grab the current const value, and if successful, |
1614 | * turn into a const sub: |
1615 | */ |
551405c4 |
1616 | SV* const const_sv = op_const_sv(CvSTART(cv), cv); |
b5c19bd7 |
1617 | if (const_sv) { |
1618 | SvREFCNT_dec(cv); |
bd61b366 |
1619 | cv = newCONSTSUB(CvSTASH(proto), NULL, const_sv); |
b5c19bd7 |
1620 | } |
1621 | else { |
1622 | CvCONST_off(cv); |
1623 | } |
dd2155a4 |
1624 | } |
1625 | |
1626 | return cv; |
1627 | } |
1628 | |
1629 | |
1630 | /* |
1631 | =for apidoc pad_fixup_inner_anons |
1632 | |
1633 | For any anon CVs in the pad, change CvOUTSIDE of that CV from |
7dafbf52 |
1634 | old_cv to new_cv if necessary. Needed when a newly-compiled CV has to be |
1635 | moved to a pre-existing CV struct. |
dd2155a4 |
1636 | |
1637 | =cut |
1638 | */ |
1639 | |
1640 | void |
1641 | Perl_pad_fixup_inner_anons(pTHX_ PADLIST *padlist, CV *old_cv, CV *new_cv) |
1642 | { |
97aff369 |
1643 | dVAR; |
dd2155a4 |
1644 | I32 ix; |
502c6561 |
1645 | AV * const comppad_name = MUTABLE_AV(AvARRAY(padlist)[0]); |
1646 | AV * const comppad = MUTABLE_AV(AvARRAY(padlist)[1]); |
53c1dcc0 |
1647 | SV ** const namepad = AvARRAY(comppad_name); |
1648 | SV ** const curpad = AvARRAY(comppad); |
7918f24d |
1649 | |
1650 | PERL_ARGS_ASSERT_PAD_FIXUP_INNER_ANONS; |
294a48e9 |
1651 | PERL_UNUSED_ARG(old_cv); |
1652 | |
dd2155a4 |
1653 | for (ix = AvFILLp(comppad_name); ix > 0; ix--) { |
551405c4 |
1654 | const SV * const namesv = namepad[ix]; |
dd2155a4 |
1655 | if (namesv && namesv != &PL_sv_undef |
b15aece3 |
1656 | && *SvPVX_const(namesv) == '&') |
dd2155a4 |
1657 | { |
ea726b52 |
1658 | CV * const innercv = MUTABLE_CV(curpad[ix]); |
7dafbf52 |
1659 | assert(CvWEAKOUTSIDE(innercv)); |
1660 | assert(CvOUTSIDE(innercv) == old_cv); |
1661 | CvOUTSIDE(innercv) = new_cv; |
dd2155a4 |
1662 | } |
1663 | } |
1664 | } |
1665 | |
7dafbf52 |
1666 | |
dd2155a4 |
1667 | /* |
1668 | =for apidoc pad_push |
1669 | |
1670 | Push a new pad frame onto the padlist, unless there's already a pad at |
26019298 |
1671 | this depth, in which case don't bother creating a new one. Then give |
1672 | the new pad an @_ in slot zero. |
dd2155a4 |
1673 | |
1674 | =cut |
1675 | */ |
1676 | |
1677 | void |
26019298 |
1678 | Perl_pad_push(pTHX_ PADLIST *padlist, int depth) |
dd2155a4 |
1679 | { |
97aff369 |
1680 | dVAR; |
7918f24d |
1681 | |
1682 | PERL_ARGS_ASSERT_PAD_PUSH; |
1683 | |
b37c2d43 |
1684 | if (depth > AvFILLp(padlist)) { |
44f8325f |
1685 | SV** const svp = AvARRAY(padlist); |
1686 | AV* const newpad = newAV(); |
1687 | SV** const oldpad = AvARRAY(svp[depth-1]); |
502c6561 |
1688 | I32 ix = AvFILLp((const AV *)svp[1]); |
1689 | const I32 names_fill = AvFILLp((const AV *)svp[0]); |
44f8325f |
1690 | SV** const names = AvARRAY(svp[0]); |
26019298 |
1691 | AV *av; |
1692 | |
dd2155a4 |
1693 | for ( ;ix > 0; ix--) { |
1694 | if (names_fill >= ix && names[ix] != &PL_sv_undef) { |
b15aece3 |
1695 | const char sigil = SvPVX_const(names[ix])[0]; |
fda94784 |
1696 | if ((SvFLAGS(names[ix]) & SVf_FAKE) |
1697 | || (SvFLAGS(names[ix]) & SVpad_STATE) |
1698 | || sigil == '&') |
1699 | { |
dd2155a4 |
1700 | /* outer lexical or anon code */ |
1701 | av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); |
1702 | } |
1703 | else { /* our own lexical */ |
26019298 |
1704 | SV *sv; |
1705 | if (sigil == '@') |
ad64d0ec |
1706 | sv = MUTABLE_SV(newAV()); |
26019298 |
1707 | else if (sigil == '%') |
ad64d0ec |
1708 | sv = MUTABLE_SV(newHV()); |
dd2155a4 |
1709 | else |
561b68a9 |
1710 | sv = newSV(0); |
26019298 |
1711 | av_store(newpad, ix, sv); |
dd2155a4 |
1712 | SvPADMY_on(sv); |
1713 | } |
1714 | } |
1715 | else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { |
f84c484e |
1716 | av_store(newpad, ix, SvREFCNT_inc_NN(oldpad[ix])); |
dd2155a4 |
1717 | } |
1718 | else { |
1719 | /* save temporaries on recursion? */ |
561b68a9 |
1720 | SV * const sv = newSV(0); |
26019298 |
1721 | av_store(newpad, ix, sv); |
dd2155a4 |
1722 | SvPADTMP_on(sv); |
1723 | } |
1724 | } |
26019298 |
1725 | av = newAV(); |
1726 | av_extend(av, 0); |
ad64d0ec |
1727 | av_store(newpad, 0, MUTABLE_SV(av)); |
11ca45c0 |
1728 | AvREIFY_only(av); |
26019298 |
1729 | |
ad64d0ec |
1730 | av_store(padlist, depth, MUTABLE_SV(newpad)); |
dd2155a4 |
1731 | AvFILLp(padlist) = depth; |
1732 | } |
1733 | } |
b21dc031 |
1734 | |
1735 | |
1736 | HV * |
1737 | Perl_pad_compname_type(pTHX_ const PADOFFSET po) |
1738 | { |
97aff369 |
1739 | dVAR; |
551405c4 |
1740 | SV* const * const av = av_fetch(PL_comppad_name, po, FALSE); |
00b1698f |
1741 | if ( SvPAD_TYPED(*av) ) { |
b21dc031 |
1742 | return SvSTASH(*av); |
1743 | } |
5c284bb0 |
1744 | return NULL; |
b21dc031 |
1745 | } |
66610fdd |
1746 | |
1747 | /* |
1748 | * Local variables: |
1749 | * c-indentation-style: bsd |
1750 | * c-basic-offset: 4 |
1751 | * indent-tabs-mode: t |
1752 | * End: |
1753 | * |
37442d52 |
1754 | * ex: set ts=8 sts=4 sw=4 noet: |
1755 | */ |