Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/sdt.h
Version:
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1 /*- 2 * Copyright 2006-2008 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: releng/8.0/sys/sys/sdt.h 189314 2009-03-03 18:23:16Z rwatson $ 26 * 27 * Statically Defined Tracing (SDT) definitions. 28 * 29 */ 30 31 #ifndef _SYS_SDT_H 32 #define _SYS_SDT_H 33 34 /* Stub these for the time being. */ 35 #define DTRACE_PROBE(name) 36 #define DTRACE_PROBE1(name, type1, arg1) 37 #define DTRACE_PROBE2(name, type1, arg1, type2, arg2) 38 #define DTRACE_PROBE3(name, type1, arg1, type2, arg2, type3, arg3) 39 #define DTRACE_PROBE4(name, type1, arg1, type2, arg2, type3, arg3, type4, arg4) 40 41 #ifndef _KERNEL 42 43 /* The promise of things to come. Worlds to explore. People to meet. Things to do. */ 44 45 #else 46 47 #ifndef KDTRACE_HOOKS 48 49 #define SDT_PROVIDER_DEFINE(prov) 50 #define SDT_PROVIDER_DECLARE(prov) 51 #define SDT_PROBE_DEFINE(prov, mod, func, name) 52 #define SDT_PROBE_DECLARE(prov, mod, func, name) 53 #define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) 54 #define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type) 55 56 #define SDT_PROBE_DEFINE1(prov, mod, func, name, arg0) 57 #define SDT_PROBE_DEFINE2(prov, mod, func, name, arg0, arg1) 58 #define SDT_PROBE_DEFINE3(prov, mod, func, name, arg0, arg1, arg2) 59 #define SDT_PROBE_DEFINE4(prov, mod, func, name, arg0, arg1, arg2, arg3) 60 #define SDT_PROBE_DEFINE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) 61 62 #else 63 64 /* 65 * This type definition must match that of dtrace_probe. It is defined this 66 * way to avoid having to rely on CDDL code. 67 */ 68 typedef void (*sdt_probe_func_t)(u_int32_t, uintptr_t arg0, uintptr_t arg1, 69 uintptr_t arg2, uintptr_t arg3, uintptr_t arg4); 70 71 /* 72 * The hook for the probe function. See kern_sdt.c which defaults this to 73 * it's own stub. The 'sdt' provider will set it to dtrace_probe when it 74 * loads. 75 */ 76 extern sdt_probe_func_t sdt_probe_func; 77 78 typedef enum { 79 SDT_UNINIT = 1, 80 SDT_INIT, 81 } sdt_state_t; 82 83 struct sdt_probe; 84 struct sdt_provider; 85 86 struct sdt_argtype { 87 int ndx; /* Argument index. */ 88 const char *type; /* Argument type string. */ 89 TAILQ_ENTRY(sdt_argtype) 90 argtype_entry; /* Argument type list entry. */ 91 struct sdt_probe 92 *probe; /* Ptr to the probe structure. */ 93 }; 94 95 struct sdt_probe { 96 int version; /* Set to sizeof(struct sdt_ref). */ 97 sdt_state_t state; 98 struct sdt_provider 99 *prov; /* Ptr to the provider structure. */ 100 TAILQ_ENTRY(sdt_probe) 101 probe_entry; /* SDT probe list entry. */ 102 TAILQ_HEAD(argtype_list_head, sdt_argtype) argtype_list; 103 const char *mod; 104 const char *func; 105 const char *name; 106 id_t id; /* DTrace probe ID. */ 107 int n_args; /* Number of arguments. */ 108 }; 109 110 struct sdt_provider { 111 const char *name; /* Provider name. */ 112 TAILQ_ENTRY(sdt_provider) 113 prov_entry; /* SDT provider list entry. */ 114 TAILQ_HEAD(probe_list_head, sdt_probe) probe_list; 115 uintptr_t id; /* DTrace provider ID. */ 116 }; 117 118 #define SDT_PROVIDER_DEFINE(prov) \ 119 struct sdt_provider sdt_provider_##prov[1] = { \ 120 { #prov, { NULL, NULL }, { NULL, NULL } } \ 121 }; \ 122 SYSINIT(sdt_provider_##prov##_init, SI_SUB_KDTRACE, \ 123 SI_ORDER_SECOND, sdt_provider_register, \ 124 sdt_provider_##prov ); \ 125 SYSUNINIT(sdt_provider_##prov##_uninit, SI_SUB_KDTRACE, \ 126 SI_ORDER_SECOND, sdt_provider_deregister, \ 127 sdt_provider_##prov ) 128 129 #define SDT_PROVIDER_DECLARE(prov) \ 130 extern struct sdt_provider sdt_provider_##prov[1] 131 132 #define SDT_PROBE_DEFINE(prov, mod, func, name) \ 133 struct sdt_probe sdt_##prov##_##mod##_##func##_##name[1] = { \ 134 { sizeof(struct sdt_probe), 0, sdt_provider_##prov, \ 135 { NULL, NULL }, { NULL, NULL }, #mod, #func, #name, 0, 0 } \ 136 }; \ 137 SYSINIT(sdt_##prov##_##mod##_##func##_##name##_init, SI_SUB_KDTRACE, \ 138 SI_ORDER_SECOND + 1, sdt_probe_register, \ 139 sdt_##prov##_##mod##_##func##_##name ); \ 140 SYSUNINIT(sdt_##prov##_##mod##_##func##_##name##_uninit, \ 141 SI_SUB_KDTRACE, SI_ORDER_SECOND + 1, sdt_probe_deregister, \ 142 sdt_##prov##_##mod##_##func##_##name ) 143 144 #define SDT_PROBE_DECLARE(prov, mod, func, name) \ 145 extern struct sdt_probe sdt_##prov##_##mod##_##func##_##name[1] 146 147 #define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \ 148 if (sdt_##prov##_##mod##_##func##_##name->id) \ 149 (*sdt_probe_func)(sdt_##prov##_##mod##_##func##_##name->id, \ 150 (uintptr_t) arg0, (uintptr_t) arg1, (uintptr_t) arg2, \ 151 (uintptr_t) arg3, (uintptr_t) arg4) 152 153 #define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type) \ 154 struct sdt_argtype sdt_##prov##_##mod##_##func##_##name##num[1] \ 155 = { { num, type, { NULL, NULL }, \ 156 sdt_##prov##_##mod##_##func##_##name } \ 157 }; \ 158 SYSINIT(sdt_##prov##_##mod##_##func##_##name##num##_init, \ 159 SI_SUB_KDTRACE, SI_ORDER_SECOND + 2, sdt_argtype_register, \ 160 sdt_##prov##_##mod##_##func##_##name##num ); \ 161 SYSUNINIT(sdt_##prov##_##mod##_##func##_##name##num##_uninit, \ 162 SI_SUB_KDTRACE, SI_ORDER_SECOND + 2, sdt_argtype_deregister, \ 163 sdt_##prov##_##mod##_##func##_##name##num ) 164 165 #define SDT_PROBE_DEFINE1(prov, mod, func, name, arg0) \ 166 SDT_PROBE_DEFINE(prov, mod, func, name); \ 167 SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0) 168 169 #define SDT_PROBE_DEFINE2(prov, mod, func, name, arg0, arg1) \ 170 SDT_PROBE_DEFINE(prov, mod, func, name); \ 171 SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \ 172 SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1) 173 174 #define SDT_PROBE_DEFINE3(prov, mod, func, name, arg0, arg1, arg2) \ 175 SDT_PROBE_DEFINE(prov, mod, func, name); \ 176 SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \ 177 SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1); \ 178 SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2) 179 180 #define SDT_PROBE_DEFINE4(prov, mod, func, name, arg0, arg1, arg2, arg3) \ 181 SDT_PROBE_DEFINE(prov, mod, func, name); \ 182 SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \ 183 SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1); \ 184 SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2); \ 185 SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3) 186 187 #define SDT_PROBE_DEFINE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \ 188 SDT_PROBE_DEFINE(prov, mod, func, name); \ 189 SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0); \ 190 SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1); \ 191 SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2); \ 192 SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3); \ 193 SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4) 194 195 typedef int (*sdt_argtype_listall_func_t)(struct sdt_argtype *, void *); 196 typedef int (*sdt_probe_listall_func_t)(struct sdt_probe *, void *); 197 typedef int (*sdt_provider_listall_func_t)(struct sdt_provider *, void *); 198 199 void sdt_argtype_deregister(void *); 200 void sdt_argtype_register(void *); 201 void sdt_probe_deregister(void *); 202 void sdt_probe_register(void *); 203 void sdt_provider_deregister(void *); 204 void sdt_provider_register(void *); 205 void sdt_probe_stub(u_int32_t, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, 206 uintptr_t arg3, uintptr_t arg4); 207 int sdt_argtype_listall(struct sdt_probe *, sdt_argtype_listall_func_t, void *); 208 int sdt_probe_listall(struct sdt_provider *, sdt_probe_listall_func_t, void *); 209 int sdt_provider_listall(sdt_provider_listall_func_t,void *); 210 211 #endif /* KDTRACE_HOOKS */ 212 213 #endif /* _KERNEL */ 214 215 #endif /* _SYS_SDT_H */
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