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tprof.h revision 1.5 
      1 /*	$NetBSD: tprof.h,v 1.5 2011/02/05 14:04:40 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2008,2009,2010 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _DEV_TPROF_TPROF_H_
     30 #define _DEV_TPROF_TPROF_H_
     31 
     32 /*
     33  * definitions used by backend drivers
     34  */
     35 
     36 #include <sys/types.h>
     37 
     38 #include <dev/tprof/tprof_types.h>
     39 
     40 typedef struct tprof_backend_cookie tprof_backend_cookie_t;
     41 
     42 typedef struct tprof_backend_ops {
     43 	uint64_t (*tbo_estimate_freq)(void);	/* samples per second */
     44 	int (*tbo_start)(tprof_backend_cookie_t *);
     45 	void (*tbo_stop)(tprof_backend_cookie_t *);
     46 } tprof_backend_ops_t;
     47 
     48 #define	TPROF_BACKEND_VERSION	3
     49 int tprof_backend_register(const char *, const tprof_backend_ops_t *, int);
     50 int tprof_backend_unregister(const char *);
     51 
     52 typedef struct {
     53 	uintptr_t tfi_pc;	/* program counter */
     54 	bool tfi_inkernel;	/* if tfi_pc is in the kernel address space */
     55 } tprof_frame_info_t;
     56 
     57 void tprof_sample(tprof_backend_cookie_t *, const tprof_frame_info_t *);
     58 
     59 #endif /* _DEV_TPROF_TPROF_H_ */
     60