blob: 5119252aded73efec4465c5239692320780650e3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
// SPDX-License-Identifier: LGPL-2.1+
/*
* Copyright (C) 2017, 2018 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nm-json.h"
#include <dlfcn.h>
typedef struct {
NMJsonVt vt;
void *dl_handle;
} NMJsonVtInternal;
static NMJsonVtInternal *
_nm_json_vt_internal_load (void)
{
NMJsonVtInternal *v;
void *handle = NULL;
int mode;
v = g_new (NMJsonVtInternal, 1);
*v = (NMJsonVtInternal) { };
#ifndef JANSSON_SONAME
#define JANSSON_SONAME ""
#endif
mode = RTLD_LAZY | RTLD_LOCAL | RTLD_NODELETE | RTLD_DEEPBIND;
#if defined (ASAN_BUILD)
/* Address sanitizer is incompatible with RTLD_DEEPBIND. */
mode &= ~RTLD_DEEPBIND;
#endif
if (strlen (JANSSON_SONAME) > 0)
handle = dlopen (JANSSON_SONAME, mode);
if (!handle)
return v;
#define TRY_BIND_SYMBOL(symbol) \
G_STMT_START { \
typeof (symbol) (*_sym) = dlsym (handle, #symbol); \
\
if (!_sym) \
goto fail_symbol; \
v->vt.nm_ ## symbol = _sym; \
} G_STMT_END
TRY_BIND_SYMBOL (json_array);
TRY_BIND_SYMBOL (json_array_append_new);
TRY_BIND_SYMBOL (json_array_get);
TRY_BIND_SYMBOL (json_array_size);
TRY_BIND_SYMBOL (json_delete);
TRY_BIND_SYMBOL (json_dumps);
TRY_BIND_SYMBOL (json_false);
TRY_BIND_SYMBOL (json_integer);
TRY_BIND_SYMBOL (json_integer_value);
TRY_BIND_SYMBOL (json_loads);
TRY_BIND_SYMBOL (json_object);
TRY_BIND_SYMBOL (json_object_del);
TRY_BIND_SYMBOL (json_object_get);
TRY_BIND_SYMBOL (json_object_iter);
TRY_BIND_SYMBOL (json_object_iter_key);
TRY_BIND_SYMBOL (json_object_iter_next);
TRY_BIND_SYMBOL (json_object_iter_value);
TRY_BIND_SYMBOL (json_object_key_to_iter);
TRY_BIND_SYMBOL (json_object_set_new);
TRY_BIND_SYMBOL (json_object_size);
TRY_BIND_SYMBOL (json_string);
TRY_BIND_SYMBOL (json_string_value);
TRY_BIND_SYMBOL (json_true);
v->vt.loaded = TRUE;
v->dl_handle = handle;
return v;
fail_symbol:
dlclose (&handle);
*v = (NMJsonVtInternal) { };
return v;
}
const NMJsonVt *_nm_json_vt_ptr = NULL;
const NMJsonVt *
_nm_json_vt_init (void)
{
NMJsonVtInternal *v;
again:
v = g_atomic_pointer_get ((gpointer *) &_nm_json_vt_ptr);
if (G_UNLIKELY (!v)) {
v = _nm_json_vt_internal_load ();
if (!g_atomic_pointer_compare_and_exchange ((gpointer *) &_nm_json_vt_ptr, NULL, v)) {
if (v->dl_handle)
dlclose (v->dl_handle);
g_free (v);
goto again;
}
/* we transfer ownership. */
}
nm_assert (v && v == g_atomic_pointer_get ((gpointer *) &_nm_json_vt_ptr));
return &v->vt;
}
const NMJsonVt *
nmtst_json_vt_reset (gboolean loaded)
{
NMJsonVtInternal *v_old;
NMJsonVtInternal *v;
v_old = g_atomic_pointer_get ((gpointer *) &_nm_json_vt_ptr);
if (!loaded) {
/* load a fake instance for testing. */
v = g_new (NMJsonVtInternal, 1);
*v = (NMJsonVtInternal) { };
} else
v = _nm_json_vt_internal_load ();
if (!g_atomic_pointer_compare_and_exchange ((gpointer *) &_nm_json_vt_ptr, v_old, v))
g_assert_not_reached ();
if (v_old) {
if (v_old->dl_handle)
dlclose (v_old->dl_handle);
g_free ((gpointer *) v_old);
}
return v->vt.loaded ? &v->vt : NULL;
}
|
