1 /*- 2 * Copyright 2008-2009 Stacey Son <sson@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 /* 29 * Backend for the lock tracing (lockstat) kernel support. This is required 30 * to allow a module to load even though DTrace kernel support may not be 31 * present. 32 * 33 */ 34 35 #ifdef KDTRACE_HOOKS 36 37 #include <sys/time.h> 38 #include <sys/types.h> 39 #include <sys/lockstat.h> 40 41 /* 42 * The following must match the type definition of dtrace_probe. It is 43 * defined this way to avoid having to rely on CDDL code. 44 */ 45 uint32_t lockstat_probemap[LS_NPROBES]; 46 void (*lockstat_probe_func)(uint32_t, uintptr_t, uintptr_t, 47 uintptr_t, uintptr_t, uintptr_t); 48 49 50 uint64_t 51 lockstat_nsecs(void) 52 { 53 struct bintime bt; 54 uint64_t ns; 55 56 binuptime(&bt); 57 ns = bt.sec * (uint64_t)1000000000; 58 ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32; 59 return (ns); 60 } 61 62 #endif /* KDTRACE_HOOKS */ 63