[ViewVC] Diff of: cvs/Devel-FindRef/FindRef.xs

Comparing Devel-FindRef/FindRef.xs (file contents):
Revision 1.9 by root, Fri Jul 11 15:29:48 2008 UTC vs.
Revision 1.23 by root, Fri May 16 06:41:37 2014 UTC

…		…
13	#endif	13	#endif
14		14
15	#if !PERL_VERSION_ATLEAST (5,10,0)	15	#if !PERL_VERSION_ATLEAST (5,10,0)
16	# define SvPAD_OUR(dummy) 0	16	# define SvPAD_OUR(dummy) 0
17	#endif	17	#endif
		18
		19	/* pre-5.10 perls always succeed, with 5.10, we have to check first apparently */
		20	#ifndef GvNAME_HEK
		21	# define GvNAME_HEK(sv) 1
		22	#endif
		23
		24	#ifndef PadARRAY
		25	# define PadARRAY(pad) AvARRAY (pad)
		26	# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
		27	#endif
		28
18		29
19	#define res_pair(text) \	30	#define res_pair(text) \
20	do { \	31	do { \
21	AV *av = newAV (); \	32	AV *av = newAV (); \
22	av_push (av, newSVpv (text, 0)); \	33	av_push (av, newSVpv (text, 0)); \
…		…
24	av_push (av, sv_rvweaken (newRV_inc (sv))); \	35	av_push (av, sv_rvweaken (newRV_inc (sv))); \
25	if (rmagical) SvRMAGICAL_off (sv); \	36	if (rmagical) SvRMAGICAL_off (sv); \
26	av_push (about, newRV_noinc ((SV *)av)); \	37	av_push (about, newRV_noinc ((SV *)av)); \
27	} while (0)	38	} while (0)
28		39
29	#define res_gv(sigil) \	40	#define res_text(text) \
30	do { \	41	do { \
31	AV *av = newAV (); \	42	AV *av = newAV (); \
32	av_push (av, newSVpv (form ("in the global %c%s::%.*s", sigil, \	43	av_push (av, newSVpv (text, 0)); \
33	HvNAME (GvSTASH (sv)), \
34	GvNAMELEN (sv), GvNAME (sv) ? GvNAME (sv) : "<anonymous>"), \
35	0)); \
36	av_push (about, newRV_noinc ((SV *)av)); \	44	av_push (about, newRV_noinc ((SV *)av)); \
37	} while (0)	45	} while (0)
38		46
		47	#define res_gv(sigil) \
		48	res_text (form ("the global %c%s::%.*s", sigil, \
		49	HvNAME (GvSTASH (sv)), \
		50	GvNAME_HEK (sv) ? GvNAMELEN (sv) : 11, \
		51	GvNAME_HEK (sv) ? GvNAME (sv) : "<anonymous>"))
		52
39	MODULE = Devel::FindRef PACKAGE = Devel::FindRef	53	MODULE = Devel::FindRef PACKAGE = Devel::FindRef
40		54
41	PROTOTYPES: ENABLE	55	PROTOTYPES: ENABLE
42		56
43	SV *
44	ptr2ref (IV ptr)
45	CODE:
46	RETVAL = newRV_inc (INT2PTR (SV *, ptr));
47	OUTPUT:
48	RETVAL
49
50	void	57	void
51	find_ (SV *target)	58	find_ (SV *target_ref)
52	PPCODE:	59	PPCODE:
53	{	60	{
54	SV arena, targ;	61	SV arena, targ;
55	U32 rmagical;	62	U32 rmagical;
56	int i;	63	int i;
57	AV *about = newAV ();	64	AV *about = newAV ();
58	AV *excl = newAV ();	65	AV *excl = newAV ();
59		66
60	if (!SvROK (target))	67	if (!SvROK (target_ref))
61	croak ("find expects a reference to a perl value");	68	croak ("find expects a reference to a perl value");
62		69
63	targ = SvRV (target);	70	targ = SvRV (target_ref);
64		71
65	for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena))	72	if (SvIMMORTAL (targ))
66	{	73	{
67	UV idx = SvREFCNT (arena);	74	if (targ == &PL_sv_undef)
68		75	res_text ("the immortal 'undef' value");
69	/* Remember that the zeroth slot is used as the pointer onwards, so don't	76	else if (targ == &PL_sv_yes)
70	include it. */	77	res_text ("the immortal 'yes' value");
71	while (--idx > 0)	78	else if (targ == &PL_sv_no)
		79	res_text ("the immortal 'no' value");
		80	else if (targ == &PL_sv_placeholder)
		81	res_text ("the immortal placeholder value");
		82	else
		83	res_text ("some unknown immortal");
		84	}
		85	else
		86	{
		87	for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena))
72	{	88	{
73	SV *sv = &arena [idx];	89	UV idx = SvREFCNT (arena);
74		90
75	if (SvTYPE (sv) >= SVt_LAST)	91	/* Remember that the zeroth slot is used as the pointer onwards, so don't
76	continue;	92	include it. */
77		93	while (--idx > 0)
78	/* temporarily disable RMAGICAL, it can easily interfere with us */
79	if ((rmagical = SvRMAGICAL (sv)))
80	SvRMAGICAL_off (sv);
81
82	if (SvTYPE (sv) >= SVt_PVMG)
83	{	94	{
		95	SV *sv = &arena [idx];
84		96
		97	if (SvTYPE (sv) >= SVt_LAST)
		98	continue;
		99
		100	/* temporarily disable RMAGICAL, it can easily interfere with us */
		101	if ((rmagical = SvRMAGICAL (sv)))
		102	SvRMAGICAL_off (sv);
		103
85	if (SvTYPE (sv) != SVt_PVMG \|\| SvPAD_OUR (sv))	104	if (SvTYPE (sv) >= SVt_PVMG)
86	{	105	{
87	MAGIC *mg = SvMAGIC (sv);	106	if (SvTYPE (sv) == SVt_PVMG && SvPAD_OUR (sv))
88
89	while (mg)
90	{	107	{
		108	/* I have no clue what this is */
		109	/* maybe some placeholder for our variables for eval? */
		110	/* it doesn't seem to reference anything, so we should be able to ignore it */
		111	}
		112	else
		113	{
		114	MAGIC *mg = SvMAGIC (sv);
		115
91	if (mg->mg_obj == targ)	116	while (mg)
		117	{
		118	if (mg->mg_obj == targ && mg->mg_flags & MGf_REFCOUNTED)
92	res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type));	119	res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type));
93		120
94	if ((SV *)mg->mg_ptr == targ && mg->mg_flags & MGf_REFCOUNTED)	121	if ((SV *)mg->mg_ptr == targ)
95	res_pair (form ("referenced (in mg_ptr) by '%c' type magic attached to", mg->mg_type));	122	res_pair (form ("%sreferenced (in mg_ptr) by '%c' type magic attached to",
		123	mg->mg_len == HEf_SVKEY ? "" : "possibly ",
		124	mg->mg_type));
96		125
97	mg = mg->mg_moremagic;	126	mg = mg->mg_moremagic;
		127	}
98	}	128	}
99	}	129	}
		130
		131	if (SvROK (sv))
		132	{
		133	if (SvRV (sv) == targ && !SvWEAKREF (sv) && sv != target_ref)
		134	res_pair ("referenced by");
		135	}
		136	else
		137	switch (SvTYPE (sv))
		138	{
		139	case SVt_PVAV:
		140	if (AvREAL (sv))
		141	for (i = AvFILLp (sv) + 1; i--; )
		142	if (AvARRAY (sv)[i] == targ)
		143	res_pair (form ("the array element %d of", i));
		144
		145	break;
		146
		147	case SVt_PVHV:
		148	if (hv_iterinit ((HV *)sv))
		149	{
		150	HE *he;
		151
		152	while ((he = hv_iternext ((HV *)sv)))
		153	if (HeVAL (he) == targ)
		154	res_pair (form ("the hash member '%.*s' of", HeKLEN (he), HeKEY (he)));
		155	}
		156
		157	break;
		158
		159	case SVt_PVCV:
		160	{
		161	int depth = CvDEPTH (sv);
		162
		163	/* Anonymous subs have a padlist but zero depth */
		164	if (CvANON (sv) && !depth && CvPADLIST (sv))
		165	depth = 1;
		166
		167	if (depth)
		168	{
		169	PADLIST *padlist = CvPADLIST (sv);
		170
		171	while (depth)
		172	{
		173	PAD *pad = PadlistARRAY (padlist)[depth];
		174
		175	av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */
		176
		177	/* The 0th pad slot is @_ */
		178	if (PadARRAY (pad)[0] == targ)
		179	res_pair ("the argument array for");
		180
		181	for (i = AvFILLp (pad) + 1; --i; )
		182	if (AvARRAY (pad)[i] == targ)
		183	{
		184	/* Values from constant functions are stored in the pad without any name */
		185	SV *name_sv = PadARRAY (PadlistARRAY (padlist)[0])[i];
		186
		187	if (name_sv && SvPOK (name_sv))
		188	res_pair (form ("the lexical '%s' in", SvPVX (name_sv)));
		189	else
		190	res_pair ("an unnamed lexical in");
		191	}
		192
		193	--depth;
		194	}
		195	}
		196
		197	if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ)
		198	res_pair ("the constant value of");
		199
		200	if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ)
		201	res_pair ("the containing scope for");
		202
		203	if (sv == targ && CvANON (sv))
		204	if (CvSTART (sv)
		205	&& CvSTART (sv)->op_type == OP_NEXTSTATE
		206	&& CopLINE ((COP *)CvSTART (sv)))
		207	res_text (form ("the closure created at %s:%d",
		208	CopFILE ((COP )CvSTART (sv)) ? CopFILE ((COP )CvSTART (sv)) : "<unknown>",
		209	CopLINE ((COP *)CvSTART (sv))));
		210	else
		211	res_text (form ("the closure created somewhere in file %s (PLEASE REPORT!)",
		212	CvFILE (sv) ? CvFILE (sv) : "<unknown>"));
		213	}
		214
		215	break;
		216
		217	case SVt_PVGV:
		218	if (GvGP (sv))
		219	{
		220	if (GvSV (sv) == (SV *)targ) res_gv ('$');
		221	if (GvAV (sv) == (AV *)targ) res_gv ('@');
		222	if (GvHV (sv) == (HV *)targ) res_gv ('%');
		223	if (GvCV (sv) == (CV *)targ) res_gv ('&');
		224	}
		225
		226	break;
		227
		228	case SVt_PVLV:
		229	if (LvTARG (sv) == targ)
		230	{
		231	if (LvTYPE (sv) == 'y')
		232	{
		233	MAGIC *mg = mg_find (sv, PERL_MAGIC_defelem);
		234
		235	if (mg && mg->mg_obj)
		236	res_pair (form ("the target for the lvalue hash element '%.*s',",
		237	(int)SvCUR (mg->mg_obj), SvPV_nolen (mg->mg_obj)));
		238	else
		239	res_pair (form ("the target for the lvalue array element #%d,", LvTARGOFF (sv)));
		240	}
		241	else
		242	res_pair (form ("an lvalue reference target (type '%c', ofs %d, len %d),",
		243	LvTYPE (sv), LvTARGOFF (sv), LvTARGLEN (sv)));
		244	}
		245
		246	break;
		247	}
		248
		249	if (rmagical)
		250	SvRMAGICAL_on (sv);
100	}	251	}
101
102	if (SvROK (sv))
103	{
104	if (sv != target && SvRV (sv) == targ && !SvWEAKREF (sv))
105	res_pair ("referenced by");
106	}
107	else
108	switch (SvTYPE (sv))
109	{
110	case SVt_PVAV:
111	if (AvREAL (sv))
112	for (i = AvFILLp (sv) + 1; i--; )
113	if (AvARRAY (sv)[i] == targ)
114	res_pair (form ("in array element %d of", i));
115
116	break;
117
118	case SVt_PVHV:
119	if (hv_iterinit ((HV *)sv))
120	{
121	HE *he;
122
123	while ((he = hv_iternext ((HV *)sv)))
124	if (HeVAL (he) == targ)
125	res_pair (form ("in the member '%.*s' of", HeKLEN (he), HeKEY (he)));
126	}
127
128	break;
129
130	case SVt_PVCV:
131	{
132	int depth = CvDEPTH (sv);
133
134	/* Anonymous subs have a padlist but zero depth */
135	if (!depth && CvPADLIST (sv))
136	depth = 1;
137
138	if (depth)
139	{
140	AV *padlist = CvPADLIST (sv);
141
142	while (depth)
143	{
144	AV pad = (AV )AvARRAY (padlist)[depth];
145
146	av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */
147
148	for (i = AvFILLp (pad) + 1; i--; )
149	if (AvARRAY (pad)[i] == targ)
150	{
151	/* Values from constant functions are stored in the pad without any name */
152	SV *name_sv = AvARRAY (AvARRAY (padlist)[0])[i];
153
154	if (name_sv && SvPOK (name_sv))
155	res_pair (form ("in the lexical '%s' in", SvPVX (name_sv)));
156	else
157	res_pair ("in an unnamed lexical in");
158	}
159
160	--depth;
161	}
162	}
163
164	if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ)
165	res_pair ("the constant value of");
166
167	if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ)
168	res_pair ("the containing scope for");
169	}
170
171	break;
172
173	case SVt_PVGV:
174	if (GvGP (sv))
175	{
176	if (GvSV (sv) == (SV *)targ) res_gv ('$');
177	if (GvAV (sv) == (AV *)targ) res_gv ('@');
178	if (GvHV (sv) == (HV *)targ) res_gv ('%');
179	if (GvCV (sv) == (CV *)targ) res_gv ('&');
180	}
181
182	break;
183	}
184
185	if (rmagical)
186	SvRMAGICAL_on (sv);
187	}	252	}
		253
		254	/* look at the mortalise stack of the current coroutine */
		255	for (i = 0; i <= PL_tmps_ix; ++i)
		256	if (PL_tmps_stack [i] == targ)
		257	res_text ("a temporary on the stack");
		258
		259	if (targ == (SV*)PL_main_cv)
		260	res_text ("the main body of the program");
188	}	261	}
189		262
190	EXTEND (SP, 2);	263	EXTEND (SP, 2);
191	PUSHs (sv_2mortal (newRV_noinc ((SV *)about)));	264	PUSHs (sv_2mortal (newRV_noinc ((SV *)about)));
192	PUSHs (sv_2mortal (newRV_noinc ((SV *)excl)));	265	PUSHs (sv_2mortal (newRV_noinc ((SV *)excl)));
193	}	266	}
194		267
		268	SV *
		269	ptr2ref (UV ptr)
		270	CODE:
		271	RETVAL = newRV_inc (INT2PTR (SV *, ptr));
		272	OUTPUT:
		273	RETVAL
		274
		275	UV
		276	ref2ptr (SV *rv)
		277	CODE:
		278	if (!SvROK (rv))
		279	croak ("argument to Devel::FindRef::ref2ptr must be a reference");
		280	RETVAL = PTR2UV (SvRV (rv));
		281	OUTPUT:
		282	RETVAL
		283
		284	U32
		285	_refcnt (SV *rv)
		286	CODE:
		287	if (!SvROK (rv))
		288	croak ("argument to Devel::FindRef::_refcnt must be a reference");
		289	RETVAL = SvREFCNT (SvRV (rv));
		290	OUTPUT:
		291	RETVAL

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Comparing Devel-FindRef/FindRef.xs (file contents): Revision 1.9 by root, Fri Jul 11 15:29:48 2008 UTC vs. Revision 1.23 by root, Fri May 16 06:41:37 2014 UTC

Diff Legend

Comparing Devel-FindRef/FindRef.xs (file contents):
Revision 1.9 by root, Fri Jul 11 15:29:48 2008 UTC vs.
Revision 1.23 by root, Fri May 16 06:41:37 2014 UTC