1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM signal
#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_SIGNAL_H
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/tracepoint.h>
#define TP_STORE_SIGINFO(__entry, info) \
do { \
if (info == SEND_SIG_NOINFO || \
info == SEND_SIG_FORCED) { \
__entry->errno = 0; \
__entry->code = SI_USER; \
} else if (info == SEND_SIG_PRIV) { \
__entry->errno = 0; \
__entry->code = SI_KERNEL; \
} else { \
__entry->errno = info->si_errno; \
__entry->code = info->si_code; \
} \
} while (0)
#ifndef TRACE_HEADER_MULTI_READ
enum {
TRACE_SIGNAL_DELIVERED,
TRACE_SIGNAL_IGNORED,
TRACE_SIGNAL_ALREADY_PENDING,
TRACE_SIGNAL_OVERFLOW_FAIL,
TRACE_SIGNAL_LOSE_INFO,
};
#endif
/**
* signal_generate - called when a signal is generated
* @sig: signal number
* @info: pointer to struct siginfo
* @task: pointer to struct task_struct
* @group: shared or private
* @result: TRACE_SIGNAL_*
*
* Current process sends a 'sig' signal to 'task' process with
* 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,
* 'info' is not a pointer and you can't access its field. Instead,
* SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV
* means that si_code is SI_KERNEL.
*/
TRACE_EVENT(signal_generate,
TP_PROTO(int sig, struct siginfo *info, struct task_struct *task,
int group, int result),
TP_ARGS(sig, info, task, group, result),
TP_STRUCT__entry(
__field( int, sig )
__field( int, errno )
__field( int, code )
__array( char, comm, TASK_COMM_LEN )
__field( pid_t, pid )
__field( int, group )
__field( int, result )
),
TP_fast_assign(
__entry->sig = sig;
TP_STORE_SIGINFO(__entry, info);
memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
__entry->pid = task->pid;
__entry->group = group;
__entry->result = result;
),
TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d",
__entry->sig, __entry->errno, __entry->code,
__entry->comm, __entry->pid, __entry->group,
__entry->result)
);
/**
* signal_deliver - called when a signal is delivered
* @sig: signal number
* @info: pointer to struct siginfo
* @ka: pointer to struct k_sigaction
*
* A 'sig' signal is delivered to current process with 'info' siginfo,
* and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
* SIG_DFL.
* Note that some signals reported by signal_generate tracepoint can be
* lost, ignored or modified (by debugger) before hitting this tracepoint.
* This means, this can show which signals are actually delivered, but
* matching generated signals and delivered signals may not be correct.
*/
TRACE_EVENT(signal_deliver,
TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),
TP_ARGS(sig, info, ka),
TP_STRUCT__entry(
__field( int, sig )
__field( int, errno )
__field( int, code )
__field( unsigned long, sa_handler )
__field( unsigned long, sa_flags )
),
TP_fast_assign(
__entry->sig = sig;
TP_STORE_SIGINFO(__entry, info);
__entry->sa_handler = (unsigned long)ka->sa.sa_handler;
__entry->sa_flags = ka->sa.sa_flags;
),
TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
__entry->sig, __entry->errno, __entry->code,
__entry->sa_handler, __entry->sa_flags)
);
#endif /* _TRACE_SIGNAL_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
|
