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| Current File : //usr/include/sys/sdt.h |
/*-
* Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/sys/sdt.h 236344 2012-05-30 23:22:52Z rstone $
*
* Statically Defined Tracing (SDT) definitions.
*
*/
#ifndef _SYS_SDT_H
#define _SYS_SDT_H
#ifndef _KERNEL
#define _DTRACE_VERSION 1
#define DTRACE_PROBE(prov, name) { \
extern void __dtrace_##prov##___##name(void); \
__dtrace_##prov##___##name(); \
}
#define DTRACE_PROBE1(prov, name, arg1) { \
extern void __dtrace_##prov##___##name(unsigned long); \
__dtrace_##prov##___##name((unsigned long)arg1); \
}
#define DTRACE_PROBE2(prov, name, arg1, arg2) { \
extern void __dtrace_##prov##___##name(unsigned long, \
unsigned long); \
__dtrace_##prov##___##name((unsigned long)arg1, \
(unsigned long)arg2); \
}
#define DTRACE_PROBE3(prov, name, arg1, arg2, arg3) { \
extern void __dtrace_##prov##___##name(unsigned long, \
unsigned long, unsigned long); \
__dtrace_##prov##___##name((unsigned long)arg1, \
(unsigned long)arg2, (unsigned long)arg3); \
}
#define DTRACE_PROBE4(prov, name, arg1, arg2, arg3, arg4) { \
extern void __dtrace_##prov##___##name(unsigned long, \
unsigned long, unsigned long, unsigned long); \
__dtrace_##prov##___##name((unsigned long)arg1, \
(unsigned long)arg2, (unsigned long)arg3, \
(unsigned long)arg4); \
}
#define DTRACE_PROBE5(prov, name, arg1, arg2, arg3, arg4, arg5) { \
extern void __dtrace_##prov##___##name(unsigned long, \
unsigned long, unsigned long, unsigned long, unsigned long);\
__dtrace_##prov##___##name((unsigned long)arg1, \
(unsigned long)arg2, (unsigned long)arg3, \
(unsigned long)arg4, (unsigned long)arg5); \
}
#else /* _KERNEL */
#ifndef KDTRACE_HOOKS
#define SDT_PROVIDER_DEFINE(prov)
#define SDT_PROVIDER_DECLARE(prov)
#define SDT_PROBE_DEFINE(prov, mod, func, name, sname)
#define SDT_PROBE_DECLARE(prov, mod, func, name)
#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
#define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type)
#define SDT_PROBE_DEFINE1(prov, mod, func, name, sname, arg0)
#define SDT_PROBE_DEFINE2(prov, mod, func, name, sname, arg0, arg1)
#define SDT_PROBE_DEFINE3(prov, mod, func, name, sname, arg0, arg1, arg2)
#define SDT_PROBE_DEFINE4(prov, mod, func, name, sname, arg0, arg1, arg2, arg3)
#define SDT_PROBE_DEFINE5(prov, mod, func, name, sname, arg0, arg1, arg2, arg3, arg4)
#define SDT_PROBE0(prov, mod, func, name)
#define SDT_PROBE1(prov, mod, func, name, arg0)
#define SDT_PROBE2(prov, mod, func, name, arg0, arg1)
#define SDT_PROBE3(prov, mod, func, name, arg0, arg1, arg2)
#define SDT_PROBE4(prov, mod, func, name, arg0, arg1, arg2, arg3)
#define SDT_PROBE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
#else
/*
* This type definition must match that of dtrace_probe. It is defined this
* way to avoid having to rely on CDDL code.
*/
typedef void (*sdt_probe_func_t)(u_int32_t, uintptr_t arg0, uintptr_t arg1,
uintptr_t arg2, uintptr_t arg3, uintptr_t arg4);
/*
* The hook for the probe function. See kern_sdt.c which defaults this to
* it's own stub. The 'sdt' provider will set it to dtrace_probe when it
* loads.
*/
extern sdt_probe_func_t sdt_probe_func;
typedef enum {
SDT_UNINIT = 1,
SDT_INIT,
} sdt_state_t;
struct sdt_probe;
struct sdt_provider;
struct sdt_argtype {
int ndx; /* Argument index. */
const char *type; /* Argument type string. */
TAILQ_ENTRY(sdt_argtype)
argtype_entry; /* Argument type list entry. */
struct sdt_probe
*probe; /* Ptr to the probe structure. */
};
struct sdt_probe {
int version; /* Set to sizeof(struct sdt_ref). */
sdt_state_t state;
struct sdt_provider
*prov; /* Ptr to the provider structure. */
TAILQ_ENTRY(sdt_probe)
probe_entry; /* SDT probe list entry. */
TAILQ_HEAD(argtype_list_head, sdt_argtype) argtype_list;
const char *mod;
const char *func;
const char *name;
id_t id; /* DTrace probe ID. */
int n_args; /* Number of arguments. */
};
struct sdt_provider {
const char *name; /* Provider name. */
TAILQ_ENTRY(sdt_provider)
prov_entry; /* SDT provider list entry. */
TAILQ_HEAD(probe_list_head, sdt_probe) probe_list;
uintptr_t id; /* DTrace provider ID. */
};
#define SDT_PROVIDER_DEFINE(prov) \
struct sdt_provider sdt_provider_##prov[1] = { \
{ #prov, { NULL, NULL }, { NULL, NULL } } \
}; \
SYSINIT(sdt_provider_##prov##_init, SI_SUB_KDTRACE, \
SI_ORDER_SECOND, sdt_provider_register, \
sdt_provider_##prov ); \
SYSUNINIT(sdt_provider_##prov##_uninit, SI_SUB_KDTRACE, \
SI_ORDER_SECOND, sdt_provider_deregister, \
sdt_provider_##prov )
#define SDT_PROVIDER_DECLARE(prov) \
extern struct sdt_provider sdt_provider_##prov[1]
#define SDT_PROBE_DEFINE(prov, mod, func, name, sname) \
struct sdt_probe sdt_##prov##_##mod##_##func##_##name[1] = { \
{ sizeof(struct sdt_probe), 0, sdt_provider_##prov, \
{ NULL, NULL }, { NULL, NULL }, #mod, #func, #sname, 0, 0 } \
}; \
SYSINIT(sdt_##prov##_##mod##_##func##_##name##_init, SI_SUB_KDTRACE, \
SI_ORDER_SECOND + 1, sdt_probe_register, \
sdt_##prov##_##mod##_##func##_##name ); \
SYSUNINIT(sdt_##prov##_##mod##_##func##_##name##_uninit, \
SI_SUB_KDTRACE, SI_ORDER_SECOND + 1, sdt_probe_deregister, \
sdt_##prov##_##mod##_##func##_##name )
#define SDT_PROBE_DECLARE(prov, mod, func, name) \
extern struct sdt_probe sdt_##prov##_##mod##_##func##_##name[1]
#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \
if (sdt_##prov##_##mod##_##func##_##name->id) \
(*sdt_probe_func)(sdt_##prov##_##mod##_##func##_##name->id, \
(uintptr_t) arg0, (uintptr_t) arg1, (uintptr_t) arg2, \
(uintptr_t) arg3, (uintptr_t) arg4)
#define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type) \
struct sdt_argtype sdt_##prov##_##mod##_##func##_##name##num[1] \
= { { num, type, { NULL, NULL }, \
sdt_##prov##_##mod##_##func##_##name } \
}; \
SYSINIT(sdt_##prov##_##mod##_##func##_##name##num##_init, \
SI_SUB_KDTRACE, SI_ORDER_SECOND + 2, sdt_argtype_register, \
sdt_##prov##_##mod##_##func##_##name##num ); \
SYSUNINIT(sdt_##prov##_##mod##_##func##_##name##num##_uninit, \
SI_SUB_KDTRACE, SI_ORDER_SECOND + 2, sdt_argtype_deregister, \
sdt_##prov##_##mod##_##func##_##name##num )
#define SDT_PROBE_DEFINE1(prov, mod, func, name, sname, arg0) \
SDT_PROBE_DEFINE(prov, mod, func, name, sname); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0)
#define SDT_PROBE_DEFINE2(prov, mod, func, name, sname, arg0, arg1) \
SDT_PROBE_DEFINE(prov, mod, func, name, sname); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1)
#define SDT_PROBE_DEFINE3(prov, mod, func, name, sname, arg0, arg1, arg2)\
SDT_PROBE_DEFINE(prov, mod, func, name, sname); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2)
#define SDT_PROBE_DEFINE4(prov, mod, func, name, sname, arg0, arg1, arg2, arg3) \
SDT_PROBE_DEFINE(prov, mod, func, name, sname); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3)
#define SDT_PROBE_DEFINE5(prov, mod, func, name, sname, arg0, arg1, arg2, arg3, arg4) \
SDT_PROBE_DEFINE(prov, mod, func, name, sname); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3); \
SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4)
#define SDT_PROBE0(prov, mod, func, name) \
SDT_PROBE(prov, mod, func, name, 0, 0, 0, 0, 0)
#define SDT_PROBE1(prov, mod, func, name, arg0) \
SDT_PROBE(prov, mod, func, name, arg0, 0, 0, 0, 0)
#define SDT_PROBE2(prov, mod, func, name, arg0, arg1) \
SDT_PROBE(prov, mod, func, name, arg0, arg1, 0, 0, 0)
#define SDT_PROBE3(prov, mod, func, name, arg0, arg1, arg2) \
SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, 0, 0)
#define SDT_PROBE4(prov, mod, func, name, arg0, arg1, arg2, arg3) \
SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, 0)
#define SDT_PROBE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \
SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
typedef int (*sdt_argtype_listall_func_t)(struct sdt_argtype *, void *);
typedef int (*sdt_probe_listall_func_t)(struct sdt_probe *, void *);
typedef int (*sdt_provider_listall_func_t)(struct sdt_provider *, void *);
void sdt_argtype_deregister(void *);
void sdt_argtype_register(void *);
void sdt_probe_deregister(void *);
void sdt_probe_register(void *);
void sdt_provider_deregister(void *);
void sdt_provider_register(void *);
void sdt_probe_stub(u_int32_t, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2,
uintptr_t arg3, uintptr_t arg4);
int sdt_argtype_listall(struct sdt_probe *, sdt_argtype_listall_func_t, void *);
int sdt_probe_listall(struct sdt_provider *, sdt_probe_listall_func_t, void *);
int sdt_provider_listall(sdt_provider_listall_func_t,void *);
void sdt_register_callbacks(sdt_provider_listall_func_t, void *,
sdt_provider_listall_func_t, void *, sdt_probe_listall_func_t, void *);
void sdt_deregister_callbacks(void);
#endif /* KDTRACE_HOOKS */
#endif /* _KERNEL */
#endif /* _SYS_SDT_H */