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/*-
* Copyright 2008-2009 Stacey Son <sson@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/kern/kern_lockstat.c 192853 2009-05-26 20:28:22Z sson $
*/
/*
* Backend for the lock tracing (lockstat) kernel support. This is required
* to allow a module to load even though DTrace kernel support may not be
* present.
*
*/
#include "opt_kdtrace.h"
#ifdef KDTRACE_HOOKS
#include <sys/time.h>
#include <sys/types.h>
#include <sys/lockstat.h>
/*
* The following must match the type definition of dtrace_probe. It is
* defined this way to avoid having to rely on CDDL code.
*/
uint32_t lockstat_probemap[LS_NPROBES];
void (*lockstat_probe_func)(uint32_t, uintptr_t, uintptr_t,
uintptr_t, uintptr_t, uintptr_t);
uint64_t
lockstat_nsecs(void)
{
struct bintime bt;
uint64_t ns;
binuptime(&bt);
ns = bt.sec * (uint64_t)1000000000;
ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32;
return (ns);
}
#endif /* KDTRACE_HOOKS */