linux/drivers/oprofile/event_buffer.h
John Levon 0c0a400d1d [PATCH] oprofile: report anonymous region samples
The below patch passes samples from anonymous regions to userspace instead
of just dropping them.  This provides the support needed for reporting
anonymous-region code samples (today: basic accumulated results; later:
Java and other dynamically compiled code).

As this changes the format, an upgrade to the just-released 0.9 release of
the userspace tools is required.

This patch is based upon an earlier one by Will Cohen <wcohen@redhat.com>

Signed-off-by: John Levon <levon@movementarian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-24 00:06:27 -07:00

51 lines
1.1 KiB
C

/**
* @file event_buffer.h
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon <levon@movementarian.org>
*/
#ifndef EVENT_BUFFER_H
#define EVENT_BUFFER_H
#include <linux/types.h>
#include <asm/semaphore.h>
int alloc_event_buffer(void);
void free_event_buffer(void);
/* wake up the process sleeping on the event file */
void wake_up_buffer_waiter(void);
/* Each escaped entry is prefixed by ESCAPE_CODE
* then one of the following codes, then the
* relevant data.
*/
#define ESCAPE_CODE ~0UL
#define CTX_SWITCH_CODE 1
#define CPU_SWITCH_CODE 2
#define COOKIE_SWITCH_CODE 3
#define KERNEL_ENTER_SWITCH_CODE 4
#define KERNEL_EXIT_SWITCH_CODE 5
#define MODULE_LOADED_CODE 6
#define CTX_TGID_CODE 7
#define TRACE_BEGIN_CODE 8
#define TRACE_END_CODE 9
#define INVALID_COOKIE ~0UL
#define NO_COOKIE 0UL
/* add data to the event buffer */
void add_event_entry(unsigned long data);
extern struct file_operations event_buffer_fops;
/* mutex between sync_cpu_buffers() and the
* file reading code.
*/
extern struct semaphore buffer_sem;
#endif /* EVENT_BUFFER_H */