xref: /freebsd/usr.bin/truss/truss.h (revision e17f5b1d)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright 2001 Jamey Wood
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD$
28  */
29 
30 #include <sys/queue.h>
31 
32 #define	FOLLOWFORKS		0x00000001
33 #define	RELATIVETIMESTAMPS	0x00000002
34 #define	ABSOLUTETIMESTAMPS	0x00000004
35 #define	NOSIGS			0x00000008
36 #define	EXECVEARGS		0x00000010
37 #define	EXECVEENVS		0x00000020
38 #define	COUNTONLY		0x00000040
39 #define	DISPLAYTIDS		0x00000080
40 
41 struct procinfo;
42 struct syscall;
43 struct trussinfo;
44 
45 /*
46  * The lookup of normal system calls are optimized by using a fixed
47  * array for the first 1024 system calls that can be indexed directly.
48  * Unknown system calls with other IDs are stored in a linked list.
49  */
50 #define	SYSCALL_NORMAL_COUNT	1024
51 
52 struct extra_syscall {
53 	STAILQ_ENTRY(extra_syscall) entries;
54 	struct syscall *sc;
55 	u_int number;
56 };
57 
58 struct procabi {
59 	const char *type;
60 	enum sysdecode_abi abi;
61 	STAILQ_HEAD(, extra_syscall) extra_syscalls;
62 	struct syscall *syscalls[SYSCALL_NORMAL_COUNT];
63 };
64 
65 /*
66  * This is confusingly named.  It holds per-thread state about the
67  * currently executing system call.  syscall.h defines a struct
68  * syscall that holds metadata used to format system call arguments.
69  *
70  * NB: args[] stores the raw argument values (e.g. from registers)
71  * passed to the system call.  s_args[] stores a string representation
72  * of a system call's arguments.  These do not necessarily map one to
73  * one.  A system call description may omit individual arguments
74  * (padding) or combine adjacent arguments (e.g. when passing an off_t
75  * argument on a 32-bit system).  The nargs member contains the count
76  * of valid pointers in s_args[], not args[].
77  */
78 struct current_syscall {
79 	struct syscall *sc;
80 	unsigned int number;
81 	unsigned int nargs;
82 	unsigned long args[10];
83 	char *s_args[10];	/* the printable arguments */
84 };
85 
86 struct threadinfo
87 {
88 	LIST_ENTRY(threadinfo) entries;
89 	struct procinfo *proc;
90 	lwpid_t tid;
91 	int in_syscall;
92 	struct current_syscall cs;
93 	struct timespec before;
94 	struct timespec after;
95 };
96 
97 struct procinfo {
98 	LIST_ENTRY(procinfo) entries;
99 	pid_t pid;
100 	struct procabi *abi;
101 
102 	LIST_HEAD(, threadinfo) threadlist;
103 };
104 
105 struct trussinfo
106 {
107 	int flags;
108 	int strsize;
109 	FILE *outfile;
110 
111 	struct timespec start_time;
112 
113 	struct threadinfo *curthread;
114 
115 	LIST_HEAD(, procinfo) proclist;
116 };
117