include/trace/events/lock.h

Source file repositories/reference/linux-study-clean/include/trace/events/lock.h

File Facts

System
Linux kernel
Corpus path
include/trace/events/lock.h
Extension
.h
Size
3022 bytes
Lines
161
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

#undef TRACE_SYSTEM
#define TRACE_SYSTEM lock

#if !defined(_TRACE_LOCK_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_LOCK_H

#include <linux/tracepoint.h>

/* flags for lock:contention_begin */
#define LCB_F_SPIN	(1U << 0)
#define LCB_F_READ	(1U << 1)
#define LCB_F_WRITE	(1U << 2)
#define LCB_F_RT	(1U << 3)
#define LCB_F_PERCPU	(1U << 4)
#define LCB_F_MUTEX	(1U << 5)


#ifdef CONFIG_LOCKDEP

#include <linux/lockdep.h>

TRACE_EVENT(lock_acquire,

	TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
		int trylock, int read, int check,
		struct lockdep_map *next_lock, unsigned long ip),

	TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),

	TP_STRUCT__entry(
		__field(unsigned int, flags)
		__string(name, lock->name)
		__field(void *, lockdep_addr)
	),

	TP_fast_assign(
		__entry->flags = (trylock ? 1 : 0) | (read ? 2 : 0);
		__assign_str(name);
		__entry->lockdep_addr = lock;
	),

	TP_printk("%p %s%s%s", __entry->lockdep_addr,
		  (__entry->flags & 1) ? "try " : "",
		  (__entry->flags & 2) ? "read " : "",
		  __get_str(name))
);

DECLARE_EVENT_CLASS(lock,

	TP_PROTO(struct lockdep_map *lock, unsigned long ip),

	TP_ARGS(lock, ip),

	TP_STRUCT__entry(
		__string(	name, 	lock->name	)
		__field(	void *, lockdep_addr	)
	),

	TP_fast_assign(
		__assign_str(name);
		__entry->lockdep_addr = lock;
	),

	TP_printk("%p %s",  __entry->lockdep_addr, __get_str(name))
);

DEFINE_EVENT(lock, lock_release,

	TP_PROTO(struct lockdep_map *lock, unsigned long ip),

	TP_ARGS(lock, ip)
);

#ifdef CONFIG_LOCK_STAT

DEFINE_EVENT(lock, lock_contended,

	TP_PROTO(struct lockdep_map *lock, unsigned long ip),

	TP_ARGS(lock, ip)
);

DEFINE_EVENT(lock, lock_acquired,

	TP_PROTO(struct lockdep_map *lock, unsigned long ip),

	TP_ARGS(lock, ip)
);

#endif /* CONFIG_LOCK_STAT */

Annotation

Implementation Notes