2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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;
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29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/sys/ktr.h,v 1.5 2005/06/20 17:59:30 dillon Exp $
37 * Generic Kernel trace buffer support.
52 #define KTR_BUFSIZE 48
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 */
65 u_int64_t ktr_timestamp;
66 struct ktr_info *ktr_info;
72 char ktr_data[KTR_BUFSIZE];
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);
79 * Take advantage of constant integer optimizations by the compiler
80 * to optimize-out disabled code at compile-time. If KTR_ENABLE_<name>
81 * is 0, the compiler avoids generating all related code when KTR is enabled.
86 SYSCTL_DECL(_debug_ktr);
88 #define KTR_INFO_MASTER(master) \
89 SYSCTL_NODE(_debug_ktr, OID_AUTO, master, CTLFLAG_RW, 0, ""); \
90 int ktr_ ## master ## _enable = -1; \
91 SYSCTL_INT(_debug_ktr, OID_AUTO, master ## _enable, CTLFLAG_RW, \
92 &ktr_ ## master ## _enable, 0, "")
94 #define KTR_INFO_MASTER_EXTERN(master) \
95 SYSCTL_DECL(_debug_ktr_ ## master); \
96 extern int ktr_ ## master ## _enable \
99 * This creates a read-only sysctl so the user knows what the mask
100 * definitions are and a number of static const int's which are used
101 * by the compiler to optimize the trace logging at compile-time and
104 #define KTR_INFO(compile, master, name, maskbit, format, datasize) \
105 static const int ktr_ ## master ## _ ## name ## _mask = \
107 static const int ktr_ ## master ## _ ## name ## _enable = \
109 static int ktr_ ## master ## _ ## name ## _mask_ro = \
111 SYSCTL_INT(_debug_ktr_ ## master, OID_AUTO, name ## _mask, \
112 CTLFLAG_RD, &ktr_ ## master ## _ ## name ## _mask_ro, \
114 static struct ktr_info ktr_info_ ## master ## _ ## name = { \
116 &ktr_ ## master ## _enable, \
120 #define KTR_LOG(name, args...) \
121 if (ktr_ ## name ## _enable && \
122 (ktr_ ## name ## _mask & *ktr_info_ ## name .kf_master_enable)) \
123 ktr_log(&ktr_info_ ## name, __FILE__, __LINE__, ##args)
125 #define KTR_LOG_PTR(name, ptr) \
126 if (ktr_ ## name ## _enable && \
127 (ktr_ ## name ## _mask & *ktr_info_ ## name .kf_master_enable)) \
128 ktr_log_ptr(&ktr_info_ ## name, __FILE__, __LINE__, ptr)
132 #define KTR_INFO_MASTER(master) \
133 const static int ktr_ ## master ## _enable = 0
135 #define KTR_INFO_MASTER_EXTERN(master) \
136 const static int ktr_ ## master ## _enable = 0
138 #define KTR_INFO(master, name, maskbit, format, datasize) \
139 static const int ktr_ ## master ## _ ## name ## _mask = \
142 #define KTR_LOG(info, args...)
143 #define KTR_LOG_PTR(info, ptr)
148 #endif /* !_SYS_KTR_H_ */