1#ifndef _LINUX_DEBUGOBJECTS_H 2#define _LINUX_DEBUGOBJECTS_H 3 4#include <linux/list.h> 5#include <linux/spinlock.h> 6 7enum 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 17struct debug_obj_descr; 18 19/** 20 * struct debug_obj - representaion of an tracked object 21 * @node: hlist node to link the object into the tracker list 22 * @state: tracked object state 23 * @astate: current active state 24 * @object: pointer to the real object 25 * @descr: pointer to an object type specific debug description structure 26 */ 27struct 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 35/** 36 * struct debug_obj_descr - object type specific debug description structure 37 * 38 * @name: name of the object typee 39 * @debug_hint: function returning address, which have associated 40 * kernel symbol, to allow identify the object 41 * @fixup_init: fixup function, which is called when the init check 42 * fails 43 * @fixup_activate: fixup function, which is called when the activate check 44 * fails 45 * @fixup_destroy: fixup function, which is called when the destroy check 46 * fails 47 * @fixup_free: fixup function, which is called when the free check 48 * fails 49 * @fixup_assert_init: fixup function, which is called when the assert_init 50 * check fails 51 */ 52struct 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 63extern void debug_object_init (void *addr, struct debug_obj_descr *descr); 64extern void 65debug_object_init_on_stack(void *addr, struct debug_obj_descr *descr); 66extern int debug_object_activate (void *addr, struct debug_obj_descr *descr); 67extern void debug_object_deactivate(void *addr, struct debug_obj_descr *descr); 68extern void debug_object_destroy (void *addr, struct debug_obj_descr *descr); 69extern void debug_object_free (void *addr, struct debug_obj_descr *descr); 70extern 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 */ 77extern void 78debug_object_active_state(void *addr, struct debug_obj_descr *descr, 79 unsigned int expect, unsigned int next); 80 81extern void debug_objects_early_init(void); 82extern void debug_objects_mem_init(void); 83#else 84static inline void 85debug_object_init (void *addr, struct debug_obj_descr *descr) { } 86static inline void 87debug_object_init_on_stack(void *addr, struct debug_obj_descr *descr) { } 88static inline int 89debug_object_activate (void *addr, struct debug_obj_descr *descr) { return 0; } 90static inline void 91debug_object_deactivate(void *addr, struct debug_obj_descr *descr) { } 92static inline void 93debug_object_destroy (void *addr, struct debug_obj_descr *descr) { } 94static inline void 95debug_object_free (void *addr, struct debug_obj_descr *descr) { } 96static inline void 97debug_object_assert_init(void *addr, struct debug_obj_descr *descr) { } 98 99static inline void debug_objects_early_init(void) { } 100static inline void debug_objects_mem_init(void) { } 101#endif 102 103#ifdef CONFIG_DEBUG_OBJECTS_FREE 104extern void debug_check_no_obj_freed(const void *address, unsigned long size); 105#else 106static inline void 107debug_check_no_obj_freed(const void *address, unsigned long size) { } 108#endif 109 110#endif 111