1a5aedd68SStacey Son /*- 2a5aedd68SStacey Son * Copyright 2008-2009 Stacey Son <sson@FreeBSD.org> 3a5aedd68SStacey Son * 4a5aedd68SStacey Son * Redistribution and use in source and binary forms, with or without 5a5aedd68SStacey Son * modification, are permitted provided that the following conditions 6a5aedd68SStacey Son * are met: 7a5aedd68SStacey Son * 1. Redistributions of source code must retain the above copyright 8a5aedd68SStacey Son * notice, this list of conditions and the following disclaimer. 9a5aedd68SStacey Son * 2. Redistributions in binary form must reproduce the above copyright 10a5aedd68SStacey Son * notice, this list of conditions and the following disclaimer in the 11a5aedd68SStacey Son * documentation and/or other materials provided with the distribution. 12a5aedd68SStacey Son * 13a5aedd68SStacey Son * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14a5aedd68SStacey Son * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15a5aedd68SStacey Son * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16a5aedd68SStacey Son * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17a5aedd68SStacey Son * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18a5aedd68SStacey Son * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19a5aedd68SStacey Son * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20a5aedd68SStacey Son * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21a5aedd68SStacey Son * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22a5aedd68SStacey Son * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23a5aedd68SStacey Son * SUCH DAMAGE. 24a5aedd68SStacey Son * 25a5aedd68SStacey Son * $FreeBSD$ 26a5aedd68SStacey Son */ 27a5aedd68SStacey Son 28a5aedd68SStacey Son /* 29a5aedd68SStacey Son * Backend for the lock tracing (lockstat) kernel support. This is required 30a5aedd68SStacey Son * to allow a module to load even though DTrace kernel support may not be 31a5aedd68SStacey Son * present. 32a5aedd68SStacey Son * 33a5aedd68SStacey Son */ 34a5aedd68SStacey Son 35a5aedd68SStacey Son #ifdef KDTRACE_HOOKS 36a5aedd68SStacey Son 37a5aedd68SStacey Son #include <sys/time.h> 38a5aedd68SStacey Son #include <sys/types.h> 39a5aedd68SStacey Son #include <sys/lockstat.h> 40a5aedd68SStacey Son 41a5aedd68SStacey Son /* 42a5aedd68SStacey Son * The following must match the type definition of dtrace_probe. It is 43a5aedd68SStacey Son * defined this way to avoid having to rely on CDDL code. 44a5aedd68SStacey Son */ 45a5aedd68SStacey Son uint32_t lockstat_probemap[LS_NPROBES]; 46a5aedd68SStacey Son void (*lockstat_probe_func)(uint32_t, uintptr_t, uintptr_t, 47a5aedd68SStacey Son uintptr_t, uintptr_t, uintptr_t); 48*efe8b26bSMark Johnston int lockstat_enabled = 0; 49a5aedd68SStacey Son 50a5aedd68SStacey Son uint64_t 51a5aedd68SStacey Son lockstat_nsecs(void) 52a5aedd68SStacey Son { 53a5aedd68SStacey Son struct bintime bt; 54a5aedd68SStacey Son uint64_t ns; 55a5aedd68SStacey Son 56*efe8b26bSMark Johnston if (!lockstat_enabled) 57*efe8b26bSMark Johnston return (0); 58*efe8b26bSMark Johnston 59a5aedd68SStacey Son binuptime(&bt); 60a5aedd68SStacey Son ns = bt.sec * (uint64_t)1000000000; 61a5aedd68SStacey Son ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32; 62a5aedd68SStacey Son return (ns); 63a5aedd68SStacey Son } 64a5aedd68SStacey Son 65a5aedd68SStacey Son #endif /* KDTRACE_HOOKS */ 66