1 /* 2 * Copyright (c) 2005 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/sys/sys/ktr.h,v 1.8 2005/12/06 23:37:55 dillon Exp $ 35 */ 36 /* 37 * Generic Kernel trace buffer support. 38 * 39 */ 40 41 #ifndef _SYS_KTR_H_ 42 #define _SYS_KTR_H_ 43 44 #ifdef _KERNEL 45 #include "opt_ktr.h" 46 #endif 47 48 #if !defined(KTR_ALL) 49 #define KTR_ALL 0 50 #endif 51 52 #define KTR_BUFSIZE 48 53 #define KTR_VERSION 3 54 55 #ifndef LOCORE 56 57 struct ktr_info { 58 const char *kf_name; /* human-interpreted subsystem name */ 59 int32_t *kf_master_enable; /* the master enable variable */ 60 const char *kf_format; /* data format */ 61 int kf_data_size; /* relevance of the data buffer */ 62 }; 63 64 struct ktr_entry { 65 u_int64_t ktr_timestamp; 66 struct ktr_info *ktr_info; 67 const char *ktr_file; 68 void *ktr_caller1; 69 void *ktr_caller2; 70 int32_t ktr_line; 71 int32_t ktr_unused; 72 int32_t ktr_data[KTR_BUFSIZE / sizeof(int32_t)]; 73 }; 74 75 void ktr_log(struct ktr_info *info, const char *file, int line, ...); 76 void ktr_log_ptr(struct ktr_info *info, const char *file, int line, const void *ptr); 77 void cpu_ktr_caller(struct ktr_entry *ktr); 78 79 /* 80 * Take advantage of constant integer optimizations by the compiler 81 * to optimize-out disabled code at compile-time. If KTR_ENABLE_<name> 82 * is 0, the compiler avoids generating all related code when KTR is enabled. 83 */ 84 85 #ifdef KTR 86 87 SYSCTL_DECL(_debug_ktr); 88 89 #define KTR_INFO_MASTER(master) \ 90 SYSCTL_NODE(_debug_ktr, OID_AUTO, master, CTLFLAG_RW, 0, ""); \ 91 int ktr_ ## master ## _enable = -1; \ 92 SYSCTL_INT(_debug_ktr, OID_AUTO, master ## _enable, CTLFLAG_RW, \ 93 &ktr_ ## master ## _enable, 0, "") 94 95 #define KTR_INFO_MASTER_EXTERN(master) \ 96 SYSCTL_DECL(_debug_ktr_ ## master); \ 97 extern int ktr_ ## master ## _enable \ 98 99 /* 100 * This creates a read-only sysctl so the user knows what the mask 101 * definitions are and a number of static const int's which are used 102 * by the compiler to optimize the trace logging at compile-time and 103 * run-time. 104 */ 105 #define KTR_INFO(compile, master, name, maskbit, format, datasize) \ 106 static const int ktr_ ## master ## _ ## name ## _mask = \ 107 1 << maskbit; \ 108 static const int ktr_ ## master ## _ ## name ## _enable = \ 109 compile; \ 110 static int ktr_ ## master ## _ ## name ## _mask_ro = \ 111 1 << maskbit; \ 112 SYSCTL_INT(_debug_ktr_ ## master, OID_AUTO, name ## _mask, \ 113 CTLFLAG_RD, &ktr_ ## master ## _ ## name ## _mask_ro, \ 114 0, ""); \ 115 static struct ktr_info ktr_info_ ## master ## _ ## name = { \ 116 #master "_" #name, \ 117 &ktr_ ## master ## _enable, \ 118 format, \ 119 datasize } 120 121 #define KTR_LOG(name, args...) \ 122 if (ktr_ ## name ## _enable && \ 123 (ktr_ ## name ## _mask & *ktr_info_ ## name .kf_master_enable)) \ 124 ktr_log(&ktr_info_ ## name, __FILE__, __LINE__, ##args) 125 126 #define KTR_LOG_PTR(name, ptr) \ 127 if (ktr_ ## name ## _enable && \ 128 (ktr_ ## name ## _mask & *ktr_info_ ## name .kf_master_enable)) \ 129 ktr_log_ptr(&ktr_info_ ## name, __FILE__, __LINE__, ptr) 130 131 #else 132 133 #define KTR_INFO_MASTER(master) \ 134 const static int ktr_ ## master ## _enable = 0 135 136 #define KTR_INFO_MASTER_EXTERN(master) \ 137 const static int ktr_ ## master ## _enable = 0 138 139 #define KTR_INFO(compile, master, name, maskbit, format, datasize) \ 140 static const int ktr_ ## master ## _ ## name ## _mask = \ 141 1 << maskbit 142 143 #define KTR_LOG(info, args...) 144 #define KTR_LOG_PTR(info, ptr) 145 146 #endif 147 148 #endif /* !LOCORE */ 149 #endif /* !_SYS_KTR_H_ */ 150