mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
b84d435cc2
Calling del_timer_sync() on an uninitialized timer leads to a never ending loop in lock_timer_base() that spins checking for a non-NULL timer base. Add an assertion to debugobjects to catch usage of uninitialized objects so that we can initialize timers in the del_timer_sync() path before it calls lock_timer_base(). [ sboyd@codeaurora.org: Clarify commit message ] Signed-off-by: Christine Chan <cschan@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/1320724108-20788-3-git-send-email-sboyd@codeaurora.org Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
#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 void 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 void
|
|
debug_object_activate (void *addr, struct debug_obj_descr *descr) { }
|
|
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
|