FreeBSD/Linux Kernel Cross Reference
sys/sys/ktrace.h
1 /*
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)ktrace.h 8.1 (Berkeley) 6/2/93
34 * $FreeBSD: src/sys/sys/ktrace.h,v 1.19.2.3 2001/01/06 09:58:23 alfred Exp $
35 * $DragonFly: src/sys/sys/ktrace.h,v 1.10 2008/04/14 12:01:53 dillon Exp $
36 */
37
38 #ifndef _SYS_KTRACE_H_
39 #define _SYS_KTRACE_H_
40
41 #ifndef _SYS_TYPES_H_
42 #include <sys/types.h>
43 #endif
44 #ifndef _SYS_TIME_H_
45 #include <sys/time.h>
46 #endif
47 #ifndef _SYS_UIO_H_
48 #include <sys/uio.h>
49 #endif
50 #ifndef _SYS_SIGNAL_H_
51 #include <sys/signal.h>
52 #endif
53
54 struct proc;
55
56 struct ktrace_node {
57 struct vnode *kn_vp;
58 int kn_refs;
59 };
60
61 typedef struct ktrace_node *ktrace_node_t;
62
63
64 /*
65 * operations to ktrace system call (KTROP(op))
66 */
67 #define KTROP_SET 0 /* set trace points */
68 #define KTROP_CLEAR 1 /* clear trace points */
69 #define KTROP_CLEARFILE 2 /* stop all tracing to file */
70 #define KTROP(o) ((o)&3) /* macro to extract operation */
71 /*
72 * flags (ORed in with operation)
73 */
74 #define KTRFLAG_DESCEND 4 /* perform op on all children too */
75
76 /*
77 * ktrace record header
78 */
79 struct ktr_header {
80 int ktr_len; /* length of buf */
81 short ktr_type; /* trace record type */
82 short ktr_flags; /* reserved for future use */
83 pid_t ktr_pid; /* process id */
84 lwpid_t ktr_tid; /* lwp id */
85 char ktr_comm[MAXCOMLEN+1]; /* command name */
86 struct timeval ktr_time; /* timestamp */
87 caddr_t ktr_buf;
88 };
89
90 #define KTRH_THREADED 0x0001 /* multiple threads present */
91
92 #define KTRH_CPUID_ENCODE(cpuid) (((cpuid) & 0xFF) << 8)
93 #define KTRH_CPUID_DECODE(flags) (((flags) >> 8) & 0xFF)
94
95 /*
96 * Test for kernel trace point (MP SAFE)
97 */
98 #define KTRPOINT(td, type) \
99 ((td)->td_proc && ((td)->td_proc->p_traceflag & (1<<(type))) && \
100 (((td)->td_proc->p_traceflag | (td)->td_lwp->lwp_traceflag) & \
101 KTRFAC_ACTIVE) == 0)
102
103
104 /*
105 * ktrace record types
106 */
107
108 /*
109 * KTR_SYSCALL - system call record
110 */
111 #define KTR_SYSCALL 1
112 struct ktr_syscall {
113 short ktr_code; /* syscall number */
114 short ktr_narg; /* number of arguments */
115 /*
116 * Followed by ktr_narg register_t (can be more than 8)
117 */
118 register_t ktr_args[8];
119 };
120
121 /*
122 * KTR_SYSRET - return from system call record
123 */
124 #define KTR_SYSRET 2
125 struct ktr_sysret {
126 short ktr_code;
127 short ktr_eosys;
128 int ktr_error;
129 register_t ktr_retval;
130 };
131
132 /*
133 * KTR_NAMEI - namei record
134 */
135 #define KTR_NAMEI 3
136 /* record contains pathname */
137
138 /*
139 * KTR_GENIO - trace generic process i/o
140 */
141 #define KTR_GENIO 4
142 struct ktr_genio {
143 int ktr_fd;
144 enum uio_rw ktr_rw;
145 /*
146 * followed by data successfully read/written
147 */
148 };
149
150 /*
151 * KTR_PSIG - trace processed signal
152 */
153 #define KTR_PSIG 5
154 struct ktr_psig {
155 int signo;
156 sig_t action;
157 int code;
158 sigset_t mask;
159 };
160
161 /*
162 * KTR_CSW - trace context switches
163 */
164 #define KTR_CSW 6
165 struct ktr_csw {
166 int out; /* 1 if switch out, 0 if switch in */
167 int user; /* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
168 };
169
170 /*
171 * KTR_USER - data comming from userland
172 */
173 #define KTR_USER_MAXLEN 2048 /* maximum length of passed data */
174 #define KTR_USER 7
175
176 /*
177 * kernel trace points (in p_traceflag)
178 */
179 #define KTRFAC_MASK 0x00ffffff
180 #define KTRFAC_SYSCALL (1<<KTR_SYSCALL)
181 #define KTRFAC_SYSRET (1<<KTR_SYSRET)
182 #define KTRFAC_NAMEI (1<<KTR_NAMEI)
183 #define KTRFAC_GENIO (1<<KTR_GENIO)
184 #define KTRFAC_PSIG (1<<KTR_PSIG)
185 #define KTRFAC_CSW (1<<KTR_CSW)
186 #define KTRFAC_USER (1<<KTR_USER)
187 /*
188 * trace flags (also in p_traceflags)
189 */
190 #define KTRFAC_ROOT 0x80000000 /* root set this trace */
191 #define KTRFAC_INHERIT 0x40000000 /* pass trace flags to children */
192 #define KTRFAC_ACTIVE 0x20000000 /* ktrace logging in progress, ignore */
193
194 #ifdef _KERNEL
195 void ktrnamei (struct lwp *,char *);
196 void ktrcsw (struct lwp *,int,int);
197 void ktrpsig (struct lwp *, int, sig_t, sigset_t *, int);
198 void ktrgenio (struct lwp *, int, enum uio_rw, struct uio *, int);
199 void ktrsyscall (struct lwp *, int, int narg, register_t args[]);
200 void ktrsysret (struct lwp *, int, int, register_t);
201 void ktrdestroy (struct ktrace_node **);
202 struct ktrace_node *ktrinherit (struct ktrace_node *);
203
204 #else
205
206 #include <sys/cdefs.h>
207
208 __BEGIN_DECLS
209 int ktrace (const char *, int, int, pid_t);
210 int utrace (const void *, size_t);
211 __END_DECLS
212
213 #endif
214
215 #endif
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