cregit-Linux how code gets into the kernel

Release 4.14 include/linux/debugobjects.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
#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
 * @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, 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) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner15100.00%1100.00%
Total15100.00%1100.00%


static inline void debug_object_init_on_stack(void *addr, struct debug_obj_descr *descr) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner15100.00%1100.00%
Total15100.00%1100.00%


static inline int debug_object_activate (void *addr, struct debug_obj_descr *descr) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner1368.42%150.00%
Paul E. McKenney631.58%150.00%
Total19100.00%2100.00%


static inline void debug_object_deactivate(void *addr, struct debug_obj_descr *descr) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner15100.00%1100.00%
Total15100.00%1100.00%


static inline void debug_object_destroy (void *addr, struct debug_obj_descr *descr) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner15100.00%1100.00%
Total15100.00%1100.00%


static inline void debug_object_free (void *addr, struct debug_obj_descr *descr) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner15100.00%1100.00%
Total15100.00%1100.00%


static inline void debug_object_assert_init(void *addr, struct debug_obj_descr *descr) { }

Contributors

PersonTokensPropCommitsCommitProp
Christine Chan15100.00%1100.00%
Total15100.00%1100.00%


static inline void debug_objects_early_init(void) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner8100.00%1100.00%
Total8100.00%1100.00%


static inline void debug_objects_mem_init(void) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner8100.00%1100.00%
Total8100.00%1100.00%

#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) { }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner15100.00%1100.00%
Total15100.00%1100.00%

#endif #endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Gleixner36777.26%111.11%
Christine Chan439.05%111.11%
Mathieu Desnoyers285.89%111.11%
Changbin Du163.37%222.22%
Stanislaw Gruszka122.53%111.11%
Paul E. McKenney71.47%111.11%
Randy Dunlap10.21%111.11%
Greg Kroah-Hartman10.21%111.11%
Total475100.00%9100.00%
Directory: include/linux
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