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

Comparing Devel-FindRef/FindRef.xs (file contents):
Revision 1.7 by root, Sat Apr 26 03:15:28 2008 UTC vs.
Revision 1.16 by root, Fri Jun 26 14:47:03 2009 UTC

…		…
10		10
11	#if !PERL_VERSION_ATLEAST (5,8,9)	11	#if !PERL_VERSION_ATLEAST (5,8,9)
12	# define SVt_LAST 16	12	# define SVt_LAST 16
13	#endif	13	#endif
14		14
		15	#if !PERL_VERSION_ATLEAST (5,10,0)
		16	# define SvPAD_OUR(dummy) 0
		17	#endif
		18
15	#define res_pair(text) \	19	#define res_pair(text) \
16	{ \	20	do { \
17	AV *av = newAV (); \	21	AV *av = newAV (); \
18	av_push (av, newSVpv (text, 0)); \	22	av_push (av, newSVpv (text, 0)); \
19	if (rmagical) SvRMAGICAL_on (sv); \	23	if (rmagical) SvRMAGICAL_on (sv); \
20	av_push (av, sv_rvweaken (newRV_inc (sv))); \	24	av_push (av, sv_rvweaken (newRV_inc (sv))); \
21	if (rmagical) SvRMAGICAL_off (sv); \	25	if (rmagical) SvRMAGICAL_off (sv); \
22	av_push (about, newRV_noinc ((SV *)av)); \	26	av_push (about, newRV_noinc ((SV *)av)); \
23	}	27	} while (0)
		28
		29	#define res_text(text) \
		30	do { \
		31	AV *av = newAV (); \
		32	av_push (av, newSVpv (text, 0)); \
		33	av_push (about, newRV_noinc ((SV *)av)); \
		34	} while (0)
24		35
25	#define res_gv(sigil) \	36	#define res_gv(sigil) \
26	{ \
27	AV *av = newAV (); \
28	av_push (av, newSVpv (form ("in the global %c%s::%.*s", sigil, \	37	res_text (form ("in the global %c%s::%.*s", sigil, \
29	HvNAME (GvSTASH (sv)), \	38	HvNAME (GvSTASH (sv)), \
		39	GvNAMELEN (sv), \
30	GvNAMELEN (sv), GvNAME (sv) ? GvNAME (sv) : "<anonymous>"), \	40	GvNAME (sv) ? GvNAME (sv) : "<anonymous>"))
31	0)); \
32	av_push (about, newRV_noinc ((SV *)av)); \
33	}
34		41
35	MODULE = Devel::FindRef PACKAGE = Devel::FindRef	42	MODULE = Devel::FindRef PACKAGE = Devel::FindRef
36		43
37	PROTOTYPES: ENABLE	44	PROTOTYPES: ENABLE
38		45
		46	void
		47	find_ (SV *target_ref)
		48	PPCODE:
		49	{
		50	SV arena, targ;
		51	U32 rmagical;
		52	int i;
		53	AV *about = newAV ();
		54	AV *excl = newAV ();
		55
		56	if (!SvROK (target_ref))
		57	croak ("find expects a reference to a perl value");
		58
		59	targ = SvRV (target_ref);
		60
		61	if (SvIMMORTAL (targ))
		62	{
		63	if (targ == &PL_sv_undef)
		64	res_text ("the immortal 'undef' value");
		65	else if (targ == &PL_sv_yes)
		66	res_text ("the immortal 'yes' value");
		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))
		77	{
		78	UV idx = SvREFCNT (arena);
		79
		80	/* Remember that the zeroth slot is used as the pointer onwards, so don't
		81	include it. */
		82	while (--idx > 0)
		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
		93	if (SvTYPE (sv) >= SVt_PVMG)
		94	{
		95	if (SvTYPE (sv) == SVt_PVMG && SvPAD_OUR (sv))
		96	{
		97	/* I have no clue what this is */
		98	/* maybe some placeholder for our variables for eval? */
		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");
		124	}
		125	else
		126	switch (SvTYPE (sv))
		127	{
		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));
		133
		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:
		149	{
		150	int depth = CvDEPTH (sv);
		151
		152	/* Anonymous subs have a padlist but zero depth */
		153	if (CvANON (sv) && !depth && CvPADLIST (sv))
		154	depth = 1;
		155
		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>"));
		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;
		236	}
		237
		238	if (rmagical)
		239	SvRMAGICAL_on (sv);
		240	}
		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");
		250	}
		251
		252	EXTEND (SP, 2);
		253	PUSHs (sv_2mortal (newRV_noinc ((SV *)about)));
		254	PUSHs (sv_2mortal (newRV_noinc ((SV *)excl)));
		255	}
		256
39	SV *	257	SV *
40	ptr2ref (IV ptr)	258	ptr2ref (UV ptr)
41	CODE:	259	CODE:
42	RETVAL = newRV_inc (INT2PTR (SV *, ptr));	260	RETVAL = newRV_inc (INT2PTR (SV *, ptr));
43	OUTPUT:	261	OUTPUT:
44	RETVAL	262	RETVAL
45		263
46	void	264	UV
47	find_ (SV *target)	265	ref2ptr (SV *rv)
48	PPCODE:	266	CODE:
49	{
50	SV arena, targ;
51	int rmagical, i;
52	AV *about = newAV ();
53	AV *excl = newAV ();
54
55	if (!SvROK (target))
56	croak ("find expects a reference to a perl value");
57
58	targ = SvRV (target);
59
60	for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena))
61	{
62	UV idx = SvREFCNT (arena);
63
64	/* Remember that the zeroth slot is used as the pointer onwards, so don't
65	include it. */
66	while (--idx > 0)
67	{
68	SV *sv = &arena [idx];
69
70	if (SvTYPE (sv) >= SVt_LAST)
71	continue;
72
73	/* temporarily disable RMAGICAL, it can easily interfere with us */
74	if ((rmagical = SvRMAGICAL (sv)))
75	SvRMAGICAL_off (sv);
76
77	if (SvTYPE (sv) >= SVt_PVMG)
78	{
79	MAGIC *mg = SvMAGIC (sv);
80	while (mg)
81	{
82	if (mg->mg_obj == targ)
83	res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type));
84
85	if ((SV *)mg->mg_ptr == targ && mg->mg_flags & MGf_REFCOUNTED)
86	res_pair (form ("referenced (in mg_ptr) by '%c' type magic attached to", mg->mg_type));
87
88	mg = mg->mg_moremagic;
89	}
90	}
91
92	if (SvROK (sv))	267	if (!SvROK (rv))
93	{	268	croak ("argument to Devel::FindRef::ref2ptr must be a reference");
94	if (sv != target && SvRV (sv) == targ && !SvWEAKREF (sv))	269	RETVAL = PTR2UV (SvRV (rv));
95	res_pair ("referenced by");	270	OUTPUT:
96	}	271	RETVAL
97	else
98	switch (SvTYPE (sv))
99	{
100	case SVt_PVAV:
101	if (AvREAL (sv))
102	for (i = AvFILLp (sv) + 1; i--; )
103	if (AvARRAY (sv)[i] == targ)
104	res_pair (form ("in array element %d of", i));
105		272
106	break;	273	U32
107		274	_refcnt (SV *rv)
108	case SVt_PVHV:	275	CODE:
109	if (hv_iterinit ((HV *)sv))	276	if (!SvROK (rv))
110	{	277	croak ("argument to Devel::FindRef::_refcnt must be a reference");
111	HE *he;	278	RETVAL = SvREFCNT (SvRV (rv));
112		279	OUTPUT:
113	while ((he = hv_iternext ((HV *)sv)))	280	RETVAL
114	if (HeVAL (he) == targ)
115	res_pair (form ("in the member '%.*s' of", HeKLEN (he), HeKEY (he)));
116	}
117
118	break;
119
120	case SVt_PVCV:
121	{
122	int depth = CvDEPTH (sv);
123
124	if (!depth && CvPADLIST(sv))
125	depth = 1;
126
127	if (depth)
128	{
129	AV *padlist = CvPADLIST (sv);
130
131	while (depth)
132	{
133	AV pad = (AV )AvARRAY (padlist)[depth];
134
135	av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */
136
137	for (i = AvFILLp (pad) + 1; i--; )
138	if (AvARRAY (pad)[i] == targ)
139	res_pair (form ("in the lexical '%s' in", SvPVX (AvARRAY (AvARRAY (padlist)[0])[i])));
140
141	--depth;
142	}
143	}
144
145	if ((SV*)CvOUTSIDE(sv) == targ)
146	res_pair ("the containing scope for");
147	}
148
149	break;
150
151	case SVt_PVGV:
152	if (GvGP (sv))
153	{
154	if (GvSV (sv) == (SV *)targ) res_gv ('$');
155	if (GvAV (sv) == (AV *)targ) res_gv ('@');
156	if (GvHV (sv) == (HV *)targ) res_gv ('%');
157	if (GvCV (sv) == (CV *)targ) res_gv ('&');
158	}
159
160	break;
161	}
162
163	if (rmagical)
164	SvRMAGICAL_on (sv);
165	}
166	}
167
168	EXTEND (SP, 2);
169	PUSHs (sv_2mortal (newRV_noinc ((SV *)about)));
170	PUSHs (sv_2mortal (newRV_noinc ((SV *)excl)));
171	}
172

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Comparing Devel-FindRef/FindRef.xs (file contents): Revision 1.7 by root, Sat Apr 26 03:15:28 2008 UTC vs. Revision 1.16 by root, Fri Jun 26 14:47:03 2009 UTC

Diff Legend

Comparing Devel-FindRef/FindRef.xs (file contents):
Revision 1.7 by root, Sat Apr 26 03:15:28 2008 UTC vs.
Revision 1.16 by root, Fri Jun 26 14:47:03 2009 UTC