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linux-headers-5.4.0-113
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linux
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Filename :
debugobjects.h
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/* 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) { } 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