… | |
… | |
41 | |
41 | |
42 | MODULE = Devel::FindRef PACKAGE = Devel::FindRef |
42 | MODULE = Devel::FindRef PACKAGE = Devel::FindRef |
43 | |
43 | |
44 | PROTOTYPES: ENABLE |
44 | PROTOTYPES: ENABLE |
45 | |
45 | |
46 | SV * |
|
|
47 | ptr2ref (IV ptr) |
|
|
48 | CODE: |
|
|
49 | RETVAL = newRV_inc (INT2PTR (SV *, ptr)); |
|
|
50 | OUTPUT: |
|
|
51 | RETVAL |
|
|
52 | |
|
|
53 | void |
46 | void |
54 | find_ (SV *target) |
47 | find_ (SV *target_ref) |
55 | PPCODE: |
48 | PPCODE: |
56 | { |
49 | { |
57 | SV *arena, *targ; |
50 | SV *arena, *targ; |
58 | U32 rmagical; |
51 | U32 rmagical; |
59 | int i; |
52 | int i; |
60 | AV *about = newAV (); |
53 | AV *about = newAV (); |
61 | AV *excl = newAV (); |
54 | AV *excl = newAV (); |
62 | |
55 | |
63 | if (!SvROK (target)) |
56 | if (!SvROK (target_ref)) |
64 | croak ("find expects a reference to a perl value"); |
57 | croak ("find expects a reference to a perl value"); |
65 | |
58 | |
66 | targ = SvRV (target); |
59 | targ = SvRV (target_ref); |
67 | |
60 | |
68 | for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena)) |
61 | if (SvIMMORTAL (targ)) |
69 | { |
62 | { |
70 | UV idx = SvREFCNT (arena); |
63 | if (targ == &PL_sv_undef) |
71 | |
64 | res_text ("the immortal 'undef' value"); |
72 | /* Remember that the zeroth slot is used as the pointer onwards, so don't |
65 | else if (targ == &PL_sv_yes) |
73 | include it. */ |
66 | res_text ("the immortal 'yes' value"); |
74 | while (--idx > 0) |
67 | else if (targ == &PL_sv_no) |
|
|
68 | res_text ("the immortal 'no' value"); |
|
|
69 | else if (targ == &PL_sv_placeholder) |
|
|
70 | res_text ("the immortal placeholder value"); |
|
|
71 | else |
|
|
72 | res_text ("some unknown immortal"); |
|
|
73 | } |
|
|
74 | else |
|
|
75 | { |
|
|
76 | for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena)) |
75 | { |
77 | { |
76 | SV *sv = &arena [idx]; |
78 | UV idx = SvREFCNT (arena); |
77 | |
79 | |
78 | if (SvTYPE (sv) >= SVt_LAST) |
80 | /* Remember that the zeroth slot is used as the pointer onwards, so don't |
79 | continue; |
81 | include it. */ |
80 | |
82 | while (--idx > 0) |
81 | /* temporarily disable RMAGICAL, it can easily interfere with us */ |
|
|
82 | if ((rmagical = SvRMAGICAL (sv))) |
|
|
83 | SvRMAGICAL_off (sv); |
|
|
84 | |
|
|
85 | if (SvTYPE (sv) >= SVt_PVMG) |
|
|
86 | { |
83 | { |
|
|
84 | SV *sv = &arena [idx]; |
|
|
85 | |
|
|
86 | if (SvTYPE (sv) >= SVt_LAST) |
|
|
87 | continue; |
|
|
88 | |
|
|
89 | /* temporarily disable RMAGICAL, it can easily interfere with us */ |
|
|
90 | if ((rmagical = SvRMAGICAL (sv))) |
|
|
91 | SvRMAGICAL_off (sv); |
|
|
92 | |
87 | if (SvTYPE (sv) == SVt_PVMG && SvPAD_OUR (sv)) |
93 | if (SvTYPE (sv) >= SVt_PVMG) |
88 | { |
94 | { |
|
|
95 | if (SvTYPE (sv) == SVt_PVMG && SvPAD_OUR (sv)) |
|
|
96 | { |
89 | /* I have no clue what this is */ |
97 | /* I have no clue what this is */ |
90 | /* maybe some placeholder for our variables for eval? */ |
98 | /* maybe some placeholder for our variables for eval? */ |
91 | /* it doesn't seem to reference anything, so we should be able to ignore it */ |
99 | /* it doesn't seem to reference anything, so we should be able to ignore it */ |
|
|
100 | } |
|
|
101 | else |
|
|
102 | { |
|
|
103 | MAGIC *mg = SvMAGIC (sv); |
|
|
104 | |
|
|
105 | while (mg) |
|
|
106 | { |
|
|
107 | if (mg->mg_obj == targ && mg->mg_flags & MGf_REFCOUNTED) |
|
|
108 | res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type)); |
|
|
109 | |
|
|
110 | if ((SV *)mg->mg_ptr == targ) |
|
|
111 | res_pair (form ("%sreferenced (in mg_ptr) by '%c' type magic attached to", |
|
|
112 | mg->mg_len == HEf_SVKEY ? "" : "possibly ", |
|
|
113 | mg->mg_type)); |
|
|
114 | |
|
|
115 | mg = mg->mg_moremagic; |
|
|
116 | } |
|
|
117 | } |
|
|
118 | } |
|
|
119 | |
|
|
120 | if (SvROK (sv)) |
|
|
121 | { |
|
|
122 | if (SvRV (sv) == targ && !SvWEAKREF (sv) && sv != target_ref) |
|
|
123 | res_pair ("referenced by"); |
92 | } |
124 | } |
93 | else |
125 | else |
|
|
126 | switch (SvTYPE (sv)) |
94 | { |
127 | { |
95 | MAGIC *mg = SvMAGIC (sv); |
128 | case SVt_PVAV: |
|
|
129 | if (AvREAL (sv)) |
|
|
130 | for (i = AvFILLp (sv) + 1; i--; ) |
|
|
131 | if (AvARRAY (sv)[i] == targ) |
|
|
132 | res_pair (form ("in array element %d of", i)); |
96 | |
133 | |
97 | while (mg) |
134 | break; |
|
|
135 | |
|
|
136 | case SVt_PVHV: |
|
|
137 | if (hv_iterinit ((HV *)sv)) |
|
|
138 | { |
|
|
139 | HE *he; |
|
|
140 | |
|
|
141 | while ((he = hv_iternext ((HV *)sv))) |
|
|
142 | if (HeVAL (he) == targ) |
|
|
143 | res_pair (form ("in the member '%.*s' of", HeKLEN (he), HeKEY (he))); |
|
|
144 | } |
|
|
145 | |
|
|
146 | break; |
|
|
147 | |
|
|
148 | case SVt_PVCV: |
98 | { |
149 | { |
99 | if (mg->mg_obj == targ) |
150 | int depth = CvDEPTH (sv); |
100 | res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type)); |
|
|
101 | |
151 | |
102 | if ((SV *)mg->mg_ptr == targ && mg->mg_flags & MGf_REFCOUNTED) |
152 | /* Anonymous subs have a padlist but zero depth */ |
103 | res_pair (form ("referenced (in mg_ptr) by '%c' type magic attached to", mg->mg_type)); |
153 | if (CvANON (sv) && !depth && CvPADLIST (sv)) |
|
|
154 | depth = 1; |
104 | |
155 | |
105 | mg = mg->mg_moremagic; |
156 | if (depth) |
|
|
157 | { |
|
|
158 | AV *padlist = CvPADLIST (sv); |
|
|
159 | |
|
|
160 | while (depth) |
|
|
161 | { |
|
|
162 | AV *pad = (AV *)AvARRAY (padlist)[depth]; |
|
|
163 | |
|
|
164 | av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */ |
|
|
165 | |
|
|
166 | /* The 0th pad slot is @_ */ |
|
|
167 | if (AvARRAY (pad)[0] == targ) |
|
|
168 | res_pair ("the argument array for"); |
|
|
169 | |
|
|
170 | for (i = AvFILLp (pad) + 1; --i; ) |
|
|
171 | if (AvARRAY (pad)[i] == targ) |
|
|
172 | { |
|
|
173 | /* Values from constant functions are stored in the pad without any name */ |
|
|
174 | SV *name_sv = AvARRAY (AvARRAY (padlist)[0])[i]; |
|
|
175 | |
|
|
176 | if (name_sv && SvPOK (name_sv)) |
|
|
177 | res_pair (form ("in the lexical '%s' in", SvPVX (name_sv))); |
|
|
178 | else |
|
|
179 | res_pair ("in an unnamed lexical in"); |
|
|
180 | } |
|
|
181 | |
|
|
182 | --depth; |
|
|
183 | } |
|
|
184 | } |
|
|
185 | |
|
|
186 | if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ) |
|
|
187 | res_pair ("the constant value of"); |
|
|
188 | |
|
|
189 | if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ) |
|
|
190 | res_pair ("the containing scope for"); |
|
|
191 | |
|
|
192 | if (sv == targ && CvANON (sv)) |
|
|
193 | if (CvSTART (sv) |
|
|
194 | && CvSTART (sv)->op_type == OP_NEXTSTATE |
|
|
195 | && CopLINE ((COP *)CvSTART (sv))) |
|
|
196 | res_text (form ("the closure created at %s:%d", |
|
|
197 | CopFILE ((COP *)CvSTART (sv)) ? CopFILE ((COP *)CvSTART (sv)) : "<unknown>", |
|
|
198 | CopLINE ((COP *)CvSTART (sv)))); |
|
|
199 | else |
|
|
200 | res_text (form ("the closure created somewhere in file %s (PLEASE REPORT!)", |
|
|
201 | CvFILE (sv) ? CvFILE (sv) : "<unknown>")); |
106 | } |
202 | } |
|
|
203 | |
|
|
204 | break; |
|
|
205 | |
|
|
206 | case SVt_PVGV: |
|
|
207 | if (GvGP (sv)) |
|
|
208 | { |
|
|
209 | if (GvSV (sv) == (SV *)targ) res_gv ('$'); |
|
|
210 | if (GvAV (sv) == (AV *)targ) res_gv ('@'); |
|
|
211 | if (GvHV (sv) == (HV *)targ) res_gv ('%'); |
|
|
212 | if (GvCV (sv) == (CV *)targ) res_gv ('&'); |
|
|
213 | } |
|
|
214 | |
|
|
215 | break; |
|
|
216 | |
|
|
217 | case SVt_PVLV: |
|
|
218 | if (LvTARG (sv) == targ) |
|
|
219 | { |
|
|
220 | if (LvTYPE (sv) == 'y') |
|
|
221 | { |
|
|
222 | MAGIC *mg = mg_find (sv, PERL_MAGIC_defelem); |
|
|
223 | |
|
|
224 | if (mg && mg->mg_obj) |
|
|
225 | res_pair (form ("the target for the lvalue hash element '%.*s',", |
|
|
226 | SvCUR (mg->mg_obj), SvPV_nolen (mg->mg_obj))); |
|
|
227 | else |
|
|
228 | res_pair (form ("the target for the lvalue array element #%d,", LvTARGOFF (sv))); |
|
|
229 | } |
|
|
230 | else |
|
|
231 | res_pair (form ("an lvalue reference target (type '%c', ofs %d, len %d),", |
|
|
232 | LvTYPE (sv), LvTARGOFF (sv), LvTARGLEN (sv))); |
|
|
233 | } |
|
|
234 | |
|
|
235 | break; |
107 | } |
236 | } |
|
|
237 | |
|
|
238 | if (rmagical) |
|
|
239 | SvRMAGICAL_on (sv); |
108 | } |
240 | } |
109 | |
|
|
110 | if (SvROK (sv)) |
|
|
111 | { |
|
|
112 | if (sv != target && SvRV (sv) == targ && !SvWEAKREF (sv)) |
|
|
113 | res_pair ("referenced by"); |
|
|
114 | } |
|
|
115 | else |
|
|
116 | switch (SvTYPE (sv)) |
|
|
117 | { |
|
|
118 | case SVt_PVAV: |
|
|
119 | if (AvREAL (sv)) |
|
|
120 | for (i = AvFILLp (sv) + 1; i--; ) |
|
|
121 | if (AvARRAY (sv)[i] == targ) |
|
|
122 | res_pair (form ("in array element %d of", i)); |
|
|
123 | |
|
|
124 | break; |
|
|
125 | |
|
|
126 | case SVt_PVHV: |
|
|
127 | if (hv_iterinit ((HV *)sv)) |
|
|
128 | { |
|
|
129 | HE *he; |
|
|
130 | |
|
|
131 | while ((he = hv_iternext ((HV *)sv))) |
|
|
132 | if (HeVAL (he) == targ) |
|
|
133 | res_pair (form ("in the member '%.*s' of", HeKLEN (he), HeKEY (he))); |
|
|
134 | } |
|
|
135 | |
|
|
136 | break; |
|
|
137 | |
|
|
138 | case SVt_PVCV: |
|
|
139 | { |
|
|
140 | int depth = CvDEPTH (sv); |
|
|
141 | |
|
|
142 | /* Anonymous subs have a padlist but zero depth */ |
|
|
143 | if (CvANON (sv) && !depth && CvPADLIST (sv)) |
|
|
144 | depth = 1; |
|
|
145 | |
|
|
146 | if (depth) |
|
|
147 | { |
|
|
148 | AV *padlist = CvPADLIST (sv); |
|
|
149 | |
|
|
150 | while (depth) |
|
|
151 | { |
|
|
152 | AV *pad = (AV *)AvARRAY (padlist)[depth]; |
|
|
153 | |
|
|
154 | av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */ |
|
|
155 | |
|
|
156 | for (i = AvFILLp (pad) + 1; i--; ) |
|
|
157 | if (AvARRAY (pad)[i] == targ) |
|
|
158 | { |
|
|
159 | /* Values from constant functions are stored in the pad without any name */ |
|
|
160 | SV *name_sv = AvARRAY (AvARRAY (padlist)[0])[i]; |
|
|
161 | |
|
|
162 | if (name_sv && SvPOK (name_sv)) |
|
|
163 | res_pair (form ("in the lexical '%s' in", SvPVX (name_sv))); |
|
|
164 | else |
|
|
165 | res_pair ("in an unnamed lexical in"); |
|
|
166 | } |
|
|
167 | |
|
|
168 | --depth; |
|
|
169 | } |
|
|
170 | } |
|
|
171 | |
|
|
172 | if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ) |
|
|
173 | res_pair ("the constant value of"); |
|
|
174 | |
|
|
175 | if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ) |
|
|
176 | res_pair ("the containing scope for"); |
|
|
177 | |
|
|
178 | if (sv == targ && CvANON (sv)) |
|
|
179 | if (CvSTART (sv) |
|
|
180 | && CvSTART (sv)->op_type == OP_NEXTSTATE |
|
|
181 | && CopLINE ((COP *)CvSTART (sv))) |
|
|
182 | res_text (form ("the closure created at %s:%d", |
|
|
183 | CopFILE ((COP *)CvSTART (sv)) ? CopFILE ((COP *)CvSTART (sv)) : "<unknown>", |
|
|
184 | CopLINE ((COP *)CvSTART (sv)))); |
|
|
185 | else |
|
|
186 | res_text (form ("the closure created somewhere in file %s (PLEASE REPORT!)", |
|
|
187 | CvFILE (sv) ? CvFILE (sv) : "<unknown>")); |
|
|
188 | } |
|
|
189 | |
|
|
190 | break; |
|
|
191 | |
|
|
192 | case SVt_PVGV: |
|
|
193 | if (GvGP (sv)) |
|
|
194 | { |
|
|
195 | if (GvSV (sv) == (SV *)targ) res_gv ('$'); |
|
|
196 | if (GvAV (sv) == (AV *)targ) res_gv ('@'); |
|
|
197 | if (GvHV (sv) == (HV *)targ) res_gv ('%'); |
|
|
198 | if (GvCV (sv) == (CV *)targ) res_gv ('&'); |
|
|
199 | } |
|
|
200 | |
|
|
201 | break; |
|
|
202 | } |
|
|
203 | |
|
|
204 | if (rmagical) |
|
|
205 | SvRMAGICAL_on (sv); |
|
|
206 | } |
241 | } |
|
|
242 | |
|
|
243 | /* look at the mortalise stack of the current coroutine */ |
|
|
244 | for (i = 0; i <= PL_tmps_ix; ++i) |
|
|
245 | if (PL_tmps_stack [i] == targ) |
|
|
246 | res_text ("a temporary on the stack"); |
|
|
247 | |
|
|
248 | if (targ == (SV*)PL_main_cv) |
|
|
249 | res_text ("the main body of the program"); |
207 | } |
250 | } |
208 | |
251 | |
209 | EXTEND (SP, 2); |
252 | EXTEND (SP, 2); |
210 | PUSHs (sv_2mortal (newRV_noinc ((SV *)about))); |
253 | PUSHs (sv_2mortal (newRV_noinc ((SV *)about))); |
211 | PUSHs (sv_2mortal (newRV_noinc ((SV *)excl))); |
254 | PUSHs (sv_2mortal (newRV_noinc ((SV *)excl))); |
212 | } |
255 | } |
213 | |
256 | |
|
|
257 | SV * |
|
|
258 | ptr2ref (UV ptr) |
|
|
259 | CODE: |
|
|
260 | RETVAL = newRV_inc (INT2PTR (SV *, ptr)); |
|
|
261 | OUTPUT: |
|
|
262 | RETVAL |
|
|
263 | |
|
|
264 | UV |
|
|
265 | ref2ptr (SV *rv) |
|
|
266 | CODE: |
|
|
267 | if (!SvROK (rv)) |
|
|
268 | croak ("argument to Devel::FindRef::ref2ptr must be a reference"); |
|
|
269 | RETVAL = PTR2UV (SvRV (rv)); |
|
|
270 | OUTPUT: |
|
|
271 | RETVAL |
|
|
272 | |
|
|
273 | U32 |
|
|
274 | _refcnt (SV *rv) |
|
|
275 | CODE: |
|
|
276 | if (!SvROK (rv)) |
|
|
277 | croak ("argument to Devel::FindRef::_refcnt must be a reference"); |
|
|
278 | RETVAL = SvREFCNT (SvRV (rv)); |
|
|
279 | OUTPUT: |
|
|
280 | RETVAL |