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>
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8 * modification, are permitted provided that the following conditions
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34 * $DragonFly: src/sys/sys/ktr.h,v 1.12 2008/06/20 01:23:27 y0netan1 Exp $
37 * Generic Kernel trace buffer support.
45 #include <sys/types.h>
47 #ifndef _SYS_SYSCTL_H_
48 #include <sys/sysctl.h>
56 * Conveniently auto-enable KTRs when particular KTRs are specified
57 * in kernel options. This way we can get logging during boot.
58 * However, if KTR_ALL is optioned, just disable everything by default.
59 * The user can enable individual masks via sysctl.
62 #define KTR_AUTO_ENABLE 0
65 #define KTR_AUTO_ENABLE -1
68 #define KTR_BUFSIZE 192
71 #define KTR_VERSION_WITH_FREQ 3
72 #define KTR_VERSION_KTR_CPU 4
77 const char *kf_name; /* human-interpreted subsystem name */
78 int32_t *kf_master_enable; /* the master enable variable */
79 const char *kf_format; /* data format */
80 int kf_data_size; /* relevance of the data buffer */
84 u_int64_t ktr_timestamp;
85 struct ktr_info *ktr_info;
91 int32_t ktr_data[KTR_BUFSIZE / sizeof(int32_t)];
95 struct ktr_entry *ktr_buf;
100 struct ktr_cpu_core core;
101 char pad[__VM_CACHELINE_ALIGN(sizeof(struct ktr_cpu_core))];
106 void ktr_log(struct ktr_info *info, const char *file, int line, ...);
107 void cpu_ktr_caller(struct ktr_entry *ktr);
112 * Take advantage of constant integer optimizations by the compiler
113 * to optimize-out disabled code at compile-time. If KTR_ENABLE_<name>
114 * is 0, the compiler avoids generating all related code when KTR is enabled.
119 SYSCTL_DECL(_debug_ktr);
121 #define KTR_INFO_MASTER(master) \
122 SYSCTL_NODE(_debug_ktr, OID_AUTO, master, CTLFLAG_RW, 0, ""); \
123 int ktr_ ## master ## _enable = KTR_AUTO_ENABLE; \
124 SYSCTL_INT(_debug_ktr, OID_AUTO, master ## _enable, CTLFLAG_RW, \
125 &ktr_ ## master ## _enable, 0, "")
127 #define KTR_INFO_MASTER_EXTERN(master) \
128 SYSCTL_DECL(_debug_ktr_ ## master); \
129 extern int ktr_ ## master ## _enable \
132 * This creates a read-only sysctl so the user knows what the mask
133 * definitions are and a number of static const int's which are used
134 * by the compiler to optimize the trace logging at compile-time and
137 #define KTR_INFO(compile, master, name, maskbit, format, datasize) \
138 static const int ktr_ ## master ## _ ## name ## _mask = \
140 static const int ktr_ ## master ## _ ## name ## _enable = \
142 static int ktr_ ## master ## _ ## name ## _mask_ro = \
144 SYSCTL_INT(_debug_ktr_ ## master, OID_AUTO, name ## _mask, \
145 CTLFLAG_RD, &ktr_ ## master ## _ ## name ## _mask_ro, \
147 static struct ktr_info ktr_info_ ## master ## _ ## name = { \
149 &ktr_ ## master ## _enable, \
153 #define KTR_LOG(name, args...) \
154 if (ktr_ ## name ## _enable && \
155 (ktr_ ## name ## _mask & *ktr_info_ ## name .kf_master_enable)) \
156 ktr_log(&ktr_info_ ## name, __FILE__, __LINE__, ##args)
160 #define KTR_INFO_MASTER(master) \
161 const static int ktr_ ## master ## _enable = 0
163 #define KTR_INFO_MASTER_EXTERN(master) \
164 const static int ktr_ ## master ## _enable
166 #define KTR_INFO(compile, master, name, maskbit, format, datasize) \
167 static const int ktr_ ## master ## _ ## name ## _mask = \
170 #define KTR_LOG(info, args...)
175 #endif /* !_SYS_KTR_H_ */