dtrace_test.c revision 302408
1/*- 2 * Copyright 2008 John Birrell <jb@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: stable/11/sys/cddl/dev/dtrace/dtrace_test.c 258622 2013-11-26 08:46:27Z avg $ 26 * 27 */ 28#include <sys/cdefs.h> 29#include <sys/types.h> 30#include <sys/param.h> 31#include <sys/systm.h> 32 33#include <sys/conf.h> 34#include <sys/kernel.h> 35#include <sys/module.h> 36#include <sys/sdt.h> 37#include <sys/sysctl.h> 38#include <sys/vnode.h> 39 40SDT_PROVIDER_DEFINE(test); 41 42SDT_PROBE_DEFINE7(test, , , sdttest, "int", "int", "int", "int", "int", 43 "int", "int"); 44 45/* 46 * These are variables that the DTrace test suite references in the 47 * Solaris kernel. We define them here so that the tests function 48 * unaltered. 49 */ 50int kmem_flags; 51 52typedef struct vnode vnode_t; 53vnode_t dummy; 54vnode_t *rootvp = &dummy; 55 56/* 57 * Test SDT probes with more than 5 arguments. On amd64, such probes require 58 * special handling since only the first 5 arguments will be passed to 59 * dtrace_probe() in registers; the rest must be fetched off the stack. 60 */ 61static int 62dtrace_test_sdttest(SYSCTL_HANDLER_ARGS) 63{ 64 int val, error; 65 66 val = 0; 67 error = sysctl_handle_int(oidp, &val, 0, req); 68 if (error || req->newptr == NULL) 69 return (error); 70 else if (val == 0) 71 return (0); 72 73 SDT_PROBE7(test, , , sdttest, 1, 2, 3, 4, 5, 6, 7); 74 75 return (error); 76} 77 78static SYSCTL_NODE(_debug, OID_AUTO, dtracetest, CTLFLAG_RD, 0, ""); 79 80SYSCTL_PROC(_debug_dtracetest, OID_AUTO, sdttest, CTLTYPE_INT | CTLFLAG_RW, 81 NULL, 0, dtrace_test_sdttest, "I", "Trigger the SDT test probe"); 82 83static int 84dtrace_test_modevent(module_t mod, int type, void *data) 85{ 86 int error = 0; 87 88 switch (type) { 89 case MOD_LOAD: 90 break; 91 92 case MOD_UNLOAD: 93 break; 94 95 case MOD_SHUTDOWN: 96 break; 97 98 default: 99 error = EOPNOTSUPP; 100 break; 101 102 } 103 return (error); 104} 105 106DEV_MODULE(dtrace_test, dtrace_test_modevent, NULL); 107MODULE_VERSION(dtrace_test, 1); 108MODULE_DEPEND(dtrace_test, dtraceall, 1, 1, 1); 109