FreeBSD/Linux Kernel Cross Reference
sys/sys/dtrace_bsd.h
1 /*-
2 * Copyright (c) 2007-2008 John Birrell (jb@freebsd.org)
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 *
28 * This file contains BSD shims for Sun's DTrace code.
29 */
30
31 #ifndef _SYS_DTRACE_BSD_H
32 #define _SYS_DTRACE_BSD_H
33
34 /* Forward definitions: */
35 struct trapframe;
36 struct thread;
37
38 /*
39 * Cyclic clock function type definition used to hook the cyclic
40 * subsystem into the appropriate timer interrupt.
41 */
42 typedef void (*cyclic_clock_func_t)(struct trapframe *);
43
44 /*
45 * These external variables are actually machine-dependent, so
46 * they might not actually exist.
47 *
48 * Defining them here avoids a proliferation of header files.
49 */
50 extern cyclic_clock_func_t lapic_cyclic_clock_func[];
51
52 /*
53 * The dtrace module handles traps that occur during a DTrace probe.
54 * This type definition is used in the trap handler to provide a
55 * hook for the dtrace module to register it's handler with.
56 */
57 typedef int (*dtrace_trap_func_t)(struct trapframe *, u_int);
58
59 int dtrace_trap(struct trapframe *, u_int);
60
61 extern dtrace_trap_func_t dtrace_trap_func;
62
63 /* Used by the machine dependent trap() code. */
64 typedef int (*dtrace_invop_func_t)(uintptr_t, uintptr_t *, uintptr_t);
65 typedef void (*dtrace_doubletrap_func_t)(void);
66
67 /* Global variables in trap.c */
68 extern dtrace_invop_func_t dtrace_invop_func;
69 extern dtrace_doubletrap_func_t dtrace_doubletrap_func;
70
71 /* Virtual time hook function type. */
72 typedef void (*dtrace_vtime_switch_func_t)(struct thread *);
73
74 extern int dtrace_vtime_active;
75 extern dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
76
77 /* The fasttrap module hooks into the fork, exit and exit. */
78 typedef void (*dtrace_fork_func_t)(struct proc *, struct proc *);
79 typedef void (*dtrace_execexit_func_t)(struct proc *);
80
81 /* Global variable in kern_fork.c */
82 extern dtrace_fork_func_t dtrace_fasttrap_fork;
83
84 /* Global variable in kern_exec.c */
85 extern dtrace_execexit_func_t dtrace_fasttrap_exec;
86
87 /* Global variable in kern_exit.c */
88 extern dtrace_execexit_func_t dtrace_fasttrap_exit;
89
90 /* The dtmalloc provider hooks into malloc. */
91 typedef void (*dtrace_malloc_probe_func_t)(u_int32_t, uintptr_t arg0,
92 uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4);
93
94 extern dtrace_malloc_probe_func_t dtrace_malloc_probe;
95
96 /*
97 * Functions which allow the dtrace module to check that the kernel
98 * hooks have been compiled with sufficient space for it's private
99 * structures.
100 */
101 size_t kdtrace_proc_size(void);
102 size_t kdtrace_thread_size(void);
103
104 /*
105 * OpenSolaris compatible time functions returning nanoseconds.
106 * On OpenSolaris these return hrtime_t which we define as uint64_t.
107 */
108 uint64_t dtrace_gethrtime(void);
109 uint64_t dtrace_gethrestime(void);
110
111 #endif /* _SYS_DTRACE_BSD_H */
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