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Current File : /proc/22665/root/usr/src/linux-headers-4.4.0-256/include/linux/debugobjects.h

#ifndef _LINUX_DEBUGOBJECTS_H
#define _LINUX_DEBUGOBJECTS_H

#include <linux/list.h>
#include <linux/spinlock.h>

enum debug_obj_state {
	ODEBUG_STATE_NONE,
	ODEBUG_STATE_INIT,
	ODEBUG_STATE_INACTIVE,
	ODEBUG_STATE_ACTIVE,
	ODEBUG_STATE_DESTROYED,
	ODEBUG_STATE_NOTAVAILABLE,
	ODEBUG_STATE_MAX,
};

struct debug_obj_descr;

/**
 * struct debug_obj - representaion of an tracked object
 * @node:	hlist node to link the object into the tracker list
 * @state:	tracked object state
 * @astate:	current active state
 * @object:	pointer to the real object
 * @descr:	pointer to an object type specific debug description structure
 */
struct debug_obj {
	struct hlist_node	node;
	enum debug_obj_state	state;
	unsigned int		astate;
	void			*object;
	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
 * @fixup_init:		fixup function, which is called when the init check
 *			fails
 * @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);
	int (*fixup_init)	(void *addr, enum debug_obj_state state);
	int (*fixup_activate)	(void *addr, enum debug_obj_state state);
	int (*fixup_destroy)	(void *addr, enum debug_obj_state state);
	int (*fixup_free)	(void *addr, enum debug_obj_state state);
	int (*fixup_assert_init)(void *addr, enum debug_obj_state state);
};

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

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