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debugobjects.h
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1 #ifndef _LINUX_DEBUGOBJECTS_H
2 #define _LINUX_DEBUGOBJECTS_H
3 
4 #include <linux/list.h>
5 #include <linux/spinlock.h>
6 
7 enum debug_obj_state {
8  ODEBUG_STATE_NONE,
9  ODEBUG_STATE_INIT,
10  ODEBUG_STATE_INACTIVE,
11  ODEBUG_STATE_ACTIVE,
12  ODEBUG_STATE_DESTROYED,
13  ODEBUG_STATE_NOTAVAILABLE,
14  ODEBUG_STATE_MAX,
15 };
16 
17 struct debug_obj_descr;
18 
27 struct debug_obj {
28  struct hlist_node node;
29  enum debug_obj_state state;
30  unsigned int astate;
31  void *object;
32  struct debug_obj_descr *descr;
33 };
34 
52 struct debug_obj_descr {
53  const char *name;
54  void *(*debug_hint) (void *addr);
55  int (*fixup_init) (void *addr, enum debug_obj_state state);
56  int (*fixup_activate) (void *addr, enum debug_obj_state state);
57  int (*fixup_destroy) (void *addr, enum debug_obj_state state);
58  int (*fixup_free) (void *addr, enum debug_obj_state state);
59  int (*fixup_assert_init)(void *addr, enum debug_obj_state state);
60 };
61 
62 #ifdef CONFIG_DEBUG_OBJECTS
63 extern void debug_object_init (void *addr, struct debug_obj_descr *descr);
64 extern void
65 debug_object_init_on_stack(void *addr, struct debug_obj_descr *descr);
66 extern void debug_object_activate (void *addr, struct debug_obj_descr *descr);
67 extern void debug_object_deactivate(void *addr, struct debug_obj_descr *descr);
68 extern void debug_object_destroy (void *addr, struct debug_obj_descr *descr);
69 extern void debug_object_free (void *addr, struct debug_obj_descr *descr);
70 extern void debug_object_assert_init(void *addr, struct debug_obj_descr *descr);
71 
72 /*
73  * Active state:
74  * - Set at 0 upon initialization.
75  * - Must return to 0 before deactivation.
76  */
77 extern void
78 debug_object_active_state(void *addr, struct debug_obj_descr *descr,
79  unsigned int expect, unsigned int next);
80 
81 extern void debug_objects_early_init(void);
82 extern void debug_objects_mem_init(void);
83 #else
84 static inline void
85 debug_object_init (void *addr, struct debug_obj_descr *descr) { }
86 static inline void
87 debug_object_init_on_stack(void *addr, struct debug_obj_descr *descr) { }
88 static inline void
89 debug_object_activate (void *addr, struct debug_obj_descr *descr) { }
90 static inline void
91 debug_object_deactivate(void *addr, struct debug_obj_descr *descr) { }
92 static inline void
93 debug_object_destroy (void *addr, struct debug_obj_descr *descr) { }
94 static inline void
95 debug_object_free (void *addr, struct debug_obj_descr *descr) { }
96 static inline void
97 debug_object_assert_init(void *addr, struct debug_obj_descr *descr) { }
98 
99 static inline void debug_objects_early_init(void) { }
100 static inline void debug_objects_mem_init(void) { }
101 #endif
102 
103 #ifdef CONFIG_DEBUG_OBJECTS_FREE
104 extern void debug_check_no_obj_freed(const void *address, unsigned long size);
105 #else
106 static inline void
107 debug_check_no_obj_freed(const void *address, unsigned long size) { }
108 #endif
109 
110 #endif
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