xnu-2050.24.15.tar.gz

[apple/xnu.git] / bsd / sys / sdt_impl.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SDT_IMPL_H
#define	_SDT_IMPL_H

/*
 * This file has been created by splitting up the original DTrace sdt.h
 * header. Keep the pragma notice here to allow version tracking.
 */

/* #pragma ident	"@(#)sdt.h	1.7	05/06/08 SMI" */

#ifdef	__cplusplus
extern "C" {
#endif

extern const char *sdt_prefix;

typedef struct sdt_probedesc {
	char			*sdpd_name;	/* name of this probe */
#if defined(__APPLE__)
	char			*sdpd_func;	
#endif /* __APPLE__ */
	unsigned long		sdpd_offset;	/* offset of call in text */
	struct sdt_probedesc	*sdpd_next;	/* next static probe */
} sdt_probedesc_t;

#ifdef	__cplusplus
}
#endif

/* #pragma ident	"@(#)sdt_impl.h	1.3	05/06/08 SMI" */

#ifdef	__cplusplus
extern "C" {
#endif

#include <sys/dtrace.h>

#if !defined(__APPLE__)
#if defined(__i386) || defined(__amd64)
typedef uint8_t sdt_instr_t;
#else
typedef uint32_t sdt_instr_t;
#endif
#else
struct module {
	int sdt_nprobes;
	sdt_probedesc_t *sdt_probes;
};

extern int sdt_invop(uintptr_t, uintptr_t *, uintptr_t);
#if defined (__APPLE__)
extern uint64_t sdt_getarg(void *, dtrace_id_t, void *, int, int);
#endif /* __APPLE__ */    

void sdt_provide_module(void *, struct modctl *);
void sdt_init(void);

extern int          sdt_probetab_size;
extern int          sdt_probetab_mask;
#define SDT_ADDR2NDX(addr)  ((((uintptr_t)(addr)) >> 4) & sdt_probetab_mask)


#if defined(__i386__) || defined(__x86_64__)
typedef uint8_t sdt_instr_t;
#else
#error Unknown implementation
#endif
#endif /* __APPLE__ */

typedef struct sdt_provider {
	const char			*sdtp_name;	/* name of provider */
	const char			*sdtp_prefix;	/* prefix for probe names */
	dtrace_pattr_t		*sdtp_attr;	/* stability attributes */
	dtrace_provider_id_t	sdtp_id;	/* provider ID */
} sdt_provider_t;

extern sdt_provider_t sdt_providers[];		/* array of providers */

typedef struct sdt_probe {
	sdt_provider_t	*sdp_provider;		/* provider */
	char		*sdp_name;		/* name of probe */
	int		sdp_namelen;		/* length of allocated name */
	dtrace_id_t	sdp_id;			/* probe ID */
	struct modctl	*sdp_ctl;		/* modctl for module */
	int		sdp_loadcnt;		/* load count for module */
	int		sdp_primary;		/* non-zero if primary mod */
	sdt_instr_t	*sdp_patchpoint;	/* patch point */
	sdt_instr_t	sdp_patchval;		/* instruction to patch */
	sdt_instr_t	sdp_savedval;		/* saved instruction value */
	struct sdt_probe *sdp_next;		/* next probe */
	struct sdt_probe *sdp_hashnext;		/* next on hash */
} sdt_probe_t;

typedef struct sdt_argdesc {
	const char *sda_provider;		/* provider for arg */
	const char *sda_name;			/* name of probe */
	const int sda_ndx;			/* argument index */
	const int sda_mapping;			/* mapping of argument */
	const char *sda_native;			/* native type of argument */
	const char *sda_xlate;			/* translated type of arg */
} sdt_argdesc_t;

extern void sdt_getargdesc(void *, dtrace_id_t, void *, dtrace_argdesc_t *);

#ifdef	__cplusplus
}
#endif

#endif	/* _SDT_IMPL_H */