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

Comparing Devel-FindRef/FindRef.xs (file contents):
Revision 1.8 by root, Sun Apr 27 05:59:06 2008 UTC vs.
Revision 1.25 by root, Sun May 18 18:44:08 2014 UTC

…		…
9	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))	9	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
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
		15	#if !PERL_VERSION_ATLEAST (5,10,0)
		16	# define SvPAD_OUR(dummy) 0
		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
14		29
15	#define res_pair(text) \	30	#define res_pair(text) \
16	do { \	31	do { \
17	AV *av = newAV (); \	32	AV *av = newAV (); \
18	av_push (av, newSVpv (text, 0)); \	33	av_push (av, newSVpv (text, 0)); \
…		…
20	av_push (av, sv_rvweaken (newRV_inc (sv))); \	35	av_push (av, sv_rvweaken (newRV_inc (sv))); \
21	if (rmagical) SvRMAGICAL_off (sv); \	36	if (rmagical) SvRMAGICAL_off (sv); \
22	av_push (about, newRV_noinc ((SV *)av)); \	37	av_push (about, newRV_noinc ((SV *)av)); \
23	} while (0)	38	} while (0)
24		39
25	#define res_gv(sigil) \	40	#define res_text(text) \
26	do { \	41	do { \
27	AV *av = newAV (); \	42	AV *av = newAV (); \
28	av_push (av, newSVpv (form ("in the global %c%s::%.*s", sigil, \	43	av_push (av, newSVpv (text, 0)); \
29	HvNAME (GvSTASH (sv)), \
30	GvNAMELEN (sv), GvNAME (sv) ? GvNAME (sv) : "<anonymous>"), \
31	0)); \
32	av_push (about, newRV_noinc ((SV *)av)); \	44	av_push (about, newRV_noinc ((SV *)av)); \
33	} while (0)	45	} while (0)
34		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
35	MODULE = Devel::FindRef PACKAGE = Devel::FindRef	53	MODULE = Devel::FindRef PACKAGE = Devel::FindRef
36		54
37	PROTOTYPES: ENABLE	55	PROTOTYPES: ENABLE
38		56
		57	void
		58	find_ (SV *target_ref)
		59	PPCODE:
		60	{
		61	SV arena, targ;
		62	U32 rmagical;
		63	int i;
		64	AV *about = newAV ();
		65	AV *excl = newAV ();
		66
		67	if (!SvROK (target_ref))
		68	croak ("find expects a reference to a perl value");
		69
		70	targ = SvRV (target_ref);
		71
		72	if (SvIMMORTAL (targ))
		73	{
		74	if (targ == &PL_sv_undef)
		75	res_text ("the immortal 'undef' value");
		76	else if (targ == &PL_sv_yes)
		77	res_text ("the immortal 'yes' value");
		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))
		88	{
		89	UV idx = SvREFCNT (arena);
		90
		91	/* Remember that the zeroth slot is used as the pointer onwards, so don't
		92	include it. */
		93	while (--idx > 0)
		94	{
		95	SV *sv = &arena [idx];
		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
		104	if (SvTYPE (sv) >= SVt_PVMG)
		105	{
		106	if (SvTYPE (sv) == SVt_PVMG && SvPAD_OUR (sv))
		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 if (SvMAGICAL (sv)) /* name-pads use SvMAGIC for other purposes */
		113	{
		114	MAGIC *mg = SvMAGIC (sv);
		115
		116	while (mg)
		117	{
		118	if (mg->mg_obj == targ && mg->mg_flags & MGf_REFCOUNTED)
		119	res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type));
		120
		121	if ((SV *)mg->mg_ptr == targ)
		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));
		125
		126	mg = mg->mg_moremagic;
		127	}
		128	}
		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	PADLIST *padlist = CvPADLIST (sv);
		162
		163	if (padlist)
		164	{
		165	int depth = CvDEPTH (sv);
		166
		167	/* Anonymous subs have a padlist but zero depth */
		168	/* some hacks switch CvANON off, so we just blindly assume a minimum of 1 */
		169	if (!depth)
		170	depth = 1;
		171
		172	while (depth)
		173	{
		174	PAD *pad = PadlistARRAY (padlist)[depth];
		175
		176	av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */
		177
		178	/* The 0th pad slot is @_ */
		179	if (PadARRAY (pad)[0] == targ)
		180	res_pair ("the argument array for");
		181
		182	for (i = AvFILLp (pad) + 1; --i; )
		183	if (AvARRAY (pad)[i] == targ)
		184	{
		185	/* Values from constant functions are stored in the pad without any name */
		186	SV *name_sv = PadARRAY (PadlistARRAY (padlist)[0])[i];
		187
		188	if (name_sv && SvPOK (name_sv))
		189	res_pair (form ("the lexical '%s' in", SvPVX (name_sv)));
		190	else
		191	res_pair ("an unnamed lexical in");
		192	}
		193
		194	--depth;
		195	}
		196	}
		197
		198	if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ)
		199	res_pair ("the constant value of");
		200
		201	if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ)
		202	res_pair ("the containing scope for");
		203
		204	if (sv == targ && CvANON (sv))
		205	if (CvSTART (sv)
		206	&& CvSTART (sv)->op_type == OP_NEXTSTATE
		207	&& CopLINE ((COP *)CvSTART (sv)))
		208	res_text (form ("the closure created at %s:%d",
		209	CopFILE ((COP )CvSTART (sv)) ? CopFILE ((COP )CvSTART (sv)) : "<unknown>",
		210	CopLINE ((COP *)CvSTART (sv))));
		211	else
		212	res_text (form ("the closure created somewhere in file %s (PLEASE REPORT!)",
		213	CvFILE (sv) ? CvFILE (sv) : "<unknown>"));
		214	}
		215
		216	break;
		217
		218	case SVt_PVGV:
		219	if (GvGP (sv))
		220	{
		221	if (GvSV (sv) == (SV *)targ) res_gv ('$');
		222	if (GvAV (sv) == (AV *)targ) res_gv ('@');
		223	if (GvHV (sv) == (HV *)targ) res_gv ('%');
		224	if (GvCV (sv) == (CV *)targ) res_gv ('&');
		225	}
		226
		227	break;
		228
		229	case SVt_PVLV:
		230	if (LvTARG (sv) == targ)
		231	{
		232	if (LvTYPE (sv) == 'y')
		233	{
		234	MAGIC *mg = mg_find (sv, PERL_MAGIC_defelem);
		235
		236	if (mg && mg->mg_obj)
		237	res_pair (form ("the target for the lvalue hash element '%.*s',",
		238	(int)SvCUR (mg->mg_obj), SvPV_nolen (mg->mg_obj)));
		239	else
		240	res_pair (form ("the target for the lvalue array element #%d,", LvTARGOFF (sv)));
		241	}
		242	else
		243	res_pair (form ("an lvalue reference target (type '%c', ofs %d, len %d),",
		244	LvTYPE (sv), LvTARGOFF (sv), LvTARGLEN (sv)));
		245	}
		246
		247	break;
		248	}
		249
		250	if (rmagical)
		251	SvRMAGICAL_on (sv);
		252	}
		253	}
		254
		255	/* look at the mortalise stack of the current coroutine */
		256	for (i = 0; i <= PL_tmps_ix; ++i)
		257	if (PL_tmps_stack [i] == targ)
		258	res_text ("a temporary on the stack");
		259
		260	if (targ == (SV*)PL_main_cv)
		261	res_text ("the main body of the program");
		262	}
		263
		264	EXTEND (SP, 2);
		265	PUSHs (sv_2mortal (newRV_noinc ((SV *)about)));
		266	PUSHs (sv_2mortal (newRV_noinc ((SV *)excl)));
		267	}
		268
39	SV *	269	SV *
40	ptr2ref (IV ptr)	270	ptr2ref (UV ptr)
41	CODE:	271	CODE:
42	RETVAL = newRV_inc (INT2PTR (SV *, ptr));	272	RETVAL = newRV_inc (INT2PTR (SV *, ptr));
43	OUTPUT:	273	OUTPUT:
44	RETVAL	274	RETVAL
45		275
46	void	276	UV
47	find_ (SV *target)	277	ref2ptr (SV *rv)
48	PPCODE:	278	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))	279	if (!SvROK (rv))
93	{	280	croak ("argument to Devel::FindRef::ref2ptr must be a reference");
94	if (sv != target && SvRV (sv) == targ && !SvWEAKREF (sv))	281	RETVAL = PTR2UV (SvRV (rv));
95	res_pair ("referenced by");	282	OUTPUT:
96	}	283	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		284
106	break;	285	U32
107		286	_refcnt (SV *rv)
108	case SVt_PVHV:	287	CODE:
109	if (hv_iterinit ((HV *)sv))	288	if (!SvROK (rv))
110	{	289	croak ("argument to Devel::FindRef::_refcnt must be a reference");
111	HE *he;	290	RETVAL = SvREFCNT (SvRV (rv));
112		291	OUTPUT:
113	while ((he = hv_iternext ((HV *)sv)))	292	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	/* Anonymous subs have a padlist but zero depth */
125	if (!depth && CvPADLIST (sv))
126	depth = 1;
127
128	if (depth)
129	{
130	AV *padlist = CvPADLIST (sv);
131
132	while (depth)
133	{
134	AV pad = (AV )AvARRAY (padlist)[depth];
135
136	av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */
137
138	for (i = AvFILLp (pad) + 1; i--; )
139	if (AvARRAY (pad)[i] == targ)
140	{
141	/* Values from constant functions are stored in the pad without any name */
142	SV *name_sv = AvARRAY (AvARRAY (padlist)[0])[i];
143
144	if (name_sv && SvPOK (name_sv))
145	res_pair (form ("in the lexical '%s' in", SvPVX (name_sv)));
146	else
147	res_pair ("in an unnamed lexical in");
148	}
149
150	--depth;
151	}
152	}
153
154	if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ)
155	res_pair ("the constant value of");
156
157	if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ)
158	res_pair ("the containing scope for");
159	}
160
161	break;
162
163	case SVt_PVGV:
164	if (GvGP (sv))
165	{
166	if (GvSV (sv) == (SV *)targ) res_gv ('$');
167	if (GvAV (sv) == (AV *)targ) res_gv ('@');
168	if (GvHV (sv) == (HV *)targ) res_gv ('%');
169	if (GvCV (sv) == (CV *)targ) res_gv ('&');
170	}
171
172	break;
173	}
174
175	if (rmagical)
176	SvRMAGICAL_on (sv);
177	}
178	}
179
180	EXTEND (SP, 2);
181	PUSHs (sv_2mortal (newRV_noinc ((SV *)about)));
182	PUSHs (sv_2mortal (newRV_noinc ((SV *)excl)));
183	}
184

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Comparing Devel-FindRef/FindRef.xs (file contents): Revision 1.8 by root, Sun Apr 27 05:59:06 2008 UTC vs. Revision 1.25 by root, Sun May 18 18:44:08 2014 UTC

Diff Legend

Comparing Devel-FindRef/FindRef.xs (file contents):
Revision 1.8 by root, Sun Apr 27 05:59:06 2008 UTC vs.
Revision 1.25 by root, Sun May 18 18:44:08 2014 UTC