include/linux/debugobjects.h

Source file repositories/reference/linux-study-clean/include/linux/debugobjects.h

File Facts

System
Linux kernel
Corpus path
include/linux/debugobjects.h
Extension
.h
Size
4193 bytes
Lines
119
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct debug_obj {
	struct hlist_node		node;
	enum debug_obj_state		state;
	unsigned int			astate;
	union {
		void			*object;
		struct hlist_node	*batch_last;
	};
	const struct debug_obj_descr *descr;
};

/**
 * struct debug_obj_descr - object type specific debug description structure
 *
 * @name:		name of the object typee
 * @debug_hint:		function returning address, which have associated
 *			kernel symbol, to allow identify the object
 * @is_static_object:	return true if the obj is static, otherwise return false
 * @fixup_init:		fixup function, which is called when the init check
 *			fails. All fixup functions must return true if fixup
 *			was successful, otherwise return false
 * @fixup_activate:	fixup function, which is called when the activate check
 *			fails
 * @fixup_destroy:	fixup function, which is called when the destroy check
 *			fails
 * @fixup_free:		fixup function, which is called when the free check
 *			fails
 * @fixup_assert_init:  fixup function, which is called when the assert_init
 *			check fails
 */
struct debug_obj_descr {
	const char		*name;
	void *(*debug_hint)(void *addr);
	bool (*is_static_object)(void *addr);
	bool (*fixup_init)(void *addr, enum debug_obj_state state);
	bool (*fixup_activate)(void *addr, enum debug_obj_state state);
	bool (*fixup_destroy)(void *addr, enum debug_obj_state state);
	bool (*fixup_free)(void *addr, enum debug_obj_state state);
	bool (*fixup_assert_init)(void *addr, enum debug_obj_state state);
};

#ifdef CONFIG_DEBUG_OBJECTS
extern void debug_object_init      (void *addr, const struct debug_obj_descr *descr);
extern void
debug_object_init_on_stack(void *addr, const struct debug_obj_descr *descr);
extern int debug_object_activate  (void *addr, const struct debug_obj_descr *descr);
extern void debug_object_deactivate(void *addr, const struct debug_obj_descr *descr);
extern void debug_object_destroy   (void *addr, const struct debug_obj_descr *descr);
extern void debug_object_free      (void *addr, const struct debug_obj_descr *descr);
extern void debug_object_assert_init(void *addr, const struct debug_obj_descr *descr);

/*
 * Active state:
 * - Set at 0 upon initialization.
 * - Must return to 0 before deactivation.
 */
extern void
debug_object_active_state(void *addr, const struct debug_obj_descr *descr,
			  unsigned int expect, unsigned int next);

extern void debug_objects_early_init(void);
extern void debug_objects_mem_init(void);
#else
static inline void
debug_object_init      (void *addr, const struct debug_obj_descr *descr) { }
static inline void
debug_object_init_on_stack(void *addr, const struct debug_obj_descr *descr) { }
static inline int
debug_object_activate  (void *addr, const struct debug_obj_descr *descr) { return 0; }
static inline void
debug_object_deactivate(void *addr, const struct debug_obj_descr *descr) { }
static inline void
debug_object_destroy   (void *addr, const struct debug_obj_descr *descr) { }
static inline void
debug_object_free      (void *addr, const struct debug_obj_descr *descr) { }
static inline void
debug_object_assert_init(void *addr, const struct debug_obj_descr *descr) { }

static inline void debug_objects_early_init(void) { }
static inline void debug_objects_mem_init(void) { }
#endif

#ifdef CONFIG_DEBUG_OBJECTS_FREE
extern void debug_check_no_obj_freed(const void *address, unsigned long size);
#else
static inline void
debug_check_no_obj_freed(const void *address, unsigned long size) { }
#endif

#endif

Annotation

Implementation Notes