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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d1eb650f MH |
2 | #undef TRACE_SYSTEM |
3 | #define TRACE_SYSTEM signal | |
4 | ||
5 | #if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ) | |
6 | #define _TRACE_SIGNAL_H | |
7 | ||
8 | #include <linux/signal.h> | |
9 | #include <linux/sched.h> | |
10 | #include <linux/tracepoint.h> | |
11 | ||
12 | #define TP_STORE_SIGINFO(__entry, info) \ | |
13 | do { \ | |
b9b76dfa ON |
14 | if (info == SEND_SIG_NOINFO || \ |
15 | info == SEND_SIG_FORCED) { \ | |
d1eb650f MH |
16 | __entry->errno = 0; \ |
17 | __entry->code = SI_USER; \ | |
18 | } else if (info == SEND_SIG_PRIV) { \ | |
19 | __entry->errno = 0; \ | |
20 | __entry->code = SI_KERNEL; \ | |
21 | } else { \ | |
22 | __entry->errno = info->si_errno; \ | |
23 | __entry->code = info->si_code; \ | |
24 | } \ | |
25 | } while (0) | |
26 | ||
6c303d3a ON |
27 | #ifndef TRACE_HEADER_MULTI_READ |
28 | enum { | |
29 | TRACE_SIGNAL_DELIVERED, | |
30 | TRACE_SIGNAL_IGNORED, | |
31 | TRACE_SIGNAL_ALREADY_PENDING, | |
32 | TRACE_SIGNAL_OVERFLOW_FAIL, | |
33 | TRACE_SIGNAL_LOSE_INFO, | |
34 | }; | |
35 | #endif | |
36 | ||
d1eb650f MH |
37 | /** |
38 | * signal_generate - called when a signal is generated | |
39 | * @sig: signal number | |
40 | * @info: pointer to struct siginfo | |
41 | * @task: pointer to struct task_struct | |
6c303d3a ON |
42 | * @group: shared or private |
43 | * @result: TRACE_SIGNAL_* | |
d1eb650f MH |
44 | * |
45 | * Current process sends a 'sig' signal to 'task' process with | |
46 | * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV, | |
47 | * 'info' is not a pointer and you can't access its field. Instead, | |
48 | * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV | |
49 | * means that si_code is SI_KERNEL. | |
50 | */ | |
51 | TRACE_EVENT(signal_generate, | |
52 | ||
6c303d3a ON |
53 | TP_PROTO(int sig, struct siginfo *info, struct task_struct *task, |
54 | int group, int result), | |
d1eb650f | 55 | |
6c303d3a | 56 | TP_ARGS(sig, info, task, group, result), |
d1eb650f MH |
57 | |
58 | TP_STRUCT__entry( | |
59 | __field( int, sig ) | |
60 | __field( int, errno ) | |
61 | __field( int, code ) | |
62 | __array( char, comm, TASK_COMM_LEN ) | |
63 | __field( pid_t, pid ) | |
6c303d3a ON |
64 | __field( int, group ) |
65 | __field( int, result ) | |
d1eb650f MH |
66 | ), |
67 | ||
68 | TP_fast_assign( | |
69 | __entry->sig = sig; | |
70 | TP_STORE_SIGINFO(__entry, info); | |
71 | memcpy(__entry->comm, task->comm, TASK_COMM_LEN); | |
72 | __entry->pid = task->pid; | |
6c303d3a ON |
73 | __entry->group = group; |
74 | __entry->result = result; | |
d1eb650f MH |
75 | ), |
76 | ||
6c303d3a | 77 | TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d", |
d1eb650f | 78 | __entry->sig, __entry->errno, __entry->code, |
6c303d3a ON |
79 | __entry->comm, __entry->pid, __entry->group, |
80 | __entry->result) | |
d1eb650f MH |
81 | ); |
82 | ||
f9d4257e MH |
83 | /** |
84 | * signal_deliver - called when a signal is delivered | |
85 | * @sig: signal number | |
86 | * @info: pointer to struct siginfo | |
87 | * @ka: pointer to struct k_sigaction | |
88 | * | |
89 | * A 'sig' signal is delivered to current process with 'info' siginfo, | |
90 | * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or | |
91 | * SIG_DFL. | |
92 | * Note that some signals reported by signal_generate tracepoint can be | |
93 | * lost, ignored or modified (by debugger) before hitting this tracepoint. | |
94 | * This means, this can show which signals are actually delivered, but | |
95 | * matching generated signals and delivered signals may not be correct. | |
96 | */ | |
97 | TRACE_EVENT(signal_deliver, | |
98 | ||
99 | TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka), | |
100 | ||
101 | TP_ARGS(sig, info, ka), | |
102 | ||
103 | TP_STRUCT__entry( | |
104 | __field( int, sig ) | |
105 | __field( int, errno ) | |
106 | __field( int, code ) | |
107 | __field( unsigned long, sa_handler ) | |
108 | __field( unsigned long, sa_flags ) | |
109 | ), | |
110 | ||
111 | TP_fast_assign( | |
112 | __entry->sig = sig; | |
113 | TP_STORE_SIGINFO(__entry, info); | |
114 | __entry->sa_handler = (unsigned long)ka->sa.sa_handler; | |
115 | __entry->sa_flags = ka->sa.sa_flags; | |
116 | ), | |
117 | ||
118 | TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx", | |
119 | __entry->sig, __entry->errno, __entry->code, | |
120 | __entry->sa_handler, __entry->sa_flags) | |
121 | ); | |
ba005e1f | 122 | |
d1eb650f MH |
123 | #endif /* _TRACE_SIGNAL_H */ |
124 | ||
125 | /* This part must be outside protection */ | |
126 | #include <trace/define_trace.h> |