Commit | Line | Data |
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0ec73ddc MD |
1 | #undef TRACE_SYSTEM |
2 | #define TRACE_SYSTEM signal | |
3 | ||
4 | #if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ) | |
5 | #define _TRACE_SIGNAL_H | |
6 | ||
7 | #include <linux/signal.h> | |
8 | #include <linux/sched.h> | |
9 | #include <linux/tracepoint.h> | |
10 | ||
11 | #define TP_STORE_SIGINFO(__entry, info) \ | |
12 | do { \ | |
13 | if (info == SEND_SIG_NOINFO || \ | |
14 | info == SEND_SIG_FORCED) { \ | |
15 | __entry->errno = 0; \ | |
16 | __entry->code = SI_USER; \ | |
17 | } else if (info == SEND_SIG_PRIV) { \ | |
18 | __entry->errno = 0; \ | |
19 | __entry->code = SI_KERNEL; \ | |
20 | } else { \ | |
21 | __entry->errno = info->si_errno; \ | |
22 | __entry->code = info->si_code; \ | |
23 | } \ | |
24 | } while (0) | |
25 | ||
26 | /** | |
27 | * signal_generate - called when a signal is generated | |
28 | * @sig: signal number | |
29 | * @info: pointer to struct siginfo | |
30 | * @task: pointer to struct task_struct | |
31 | * | |
32 | * Current process sends a 'sig' signal to 'task' process with | |
33 | * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV, | |
34 | * 'info' is not a pointer and you can't access its field. Instead, | |
35 | * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV | |
36 | * means that si_code is SI_KERNEL. | |
37 | */ | |
38 | TRACE_EVENT(signal_generate, | |
39 | ||
40 | TP_PROTO(int sig, struct siginfo *info, struct task_struct *task), | |
41 | ||
42 | TP_ARGS(sig, info, task), | |
43 | ||
44 | TP_STRUCT__entry( | |
45 | __field( int, sig ) | |
46 | __field( int, errno ) | |
47 | __field( int, code ) | |
48 | __array( char, comm, TASK_COMM_LEN ) | |
49 | __field( pid_t, pid ) | |
50 | ), | |
51 | ||
52 | TP_fast_assign( | |
53 | __entry->sig = sig; | |
54 | TP_STORE_SIGINFO(__entry, info); | |
55 | memcpy(__entry->comm, task->comm, TASK_COMM_LEN); | |
56 | __entry->pid = task->pid; | |
57 | ), | |
58 | ||
59 | TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d", | |
60 | __entry->sig, __entry->errno, __entry->code, | |
61 | __entry->comm, __entry->pid) | |
62 | ); | |
63 | ||
64 | /** | |
65 | * signal_deliver - called when a signal is delivered | |
66 | * @sig: signal number | |
67 | * @info: pointer to struct siginfo | |
68 | * @ka: pointer to struct k_sigaction | |
69 | * | |
70 | * A 'sig' signal is delivered to current process with 'info' siginfo, | |
71 | * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or | |
72 | * SIG_DFL. | |
73 | * Note that some signals reported by signal_generate tracepoint can be | |
74 | * lost, ignored or modified (by debugger) before hitting this tracepoint. | |
75 | * This means, this can show which signals are actually delivered, but | |
76 | * matching generated signals and delivered signals may not be correct. | |
77 | */ | |
78 | TRACE_EVENT(signal_deliver, | |
79 | ||
80 | TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka), | |
81 | ||
82 | TP_ARGS(sig, info, ka), | |
83 | ||
84 | TP_STRUCT__entry( | |
85 | __field( int, sig ) | |
86 | __field( int, errno ) | |
87 | __field( int, code ) | |
88 | __field( unsigned long, sa_handler ) | |
89 | __field( unsigned long, sa_flags ) | |
90 | ), | |
91 | ||
92 | TP_fast_assign( | |
93 | __entry->sig = sig; | |
94 | TP_STORE_SIGINFO(__entry, info); | |
95 | __entry->sa_handler = (unsigned long)ka->sa.sa_handler; | |
96 | __entry->sa_flags = ka->sa.sa_flags; | |
97 | ), | |
98 | ||
99 | TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx", | |
100 | __entry->sig, __entry->errno, __entry->code, | |
101 | __entry->sa_handler, __entry->sa_flags) | |
102 | ); | |
103 | ||
104 | DECLARE_EVENT_CLASS(signal_queue_overflow, | |
105 | ||
106 | TP_PROTO(int sig, int group, struct siginfo *info), | |
107 | ||
108 | TP_ARGS(sig, group, info), | |
109 | ||
110 | TP_STRUCT__entry( | |
111 | __field( int, sig ) | |
112 | __field( int, group ) | |
113 | __field( int, errno ) | |
114 | __field( int, code ) | |
115 | ), | |
116 | ||
117 | TP_fast_assign( | |
118 | __entry->sig = sig; | |
119 | __entry->group = group; | |
120 | TP_STORE_SIGINFO(__entry, info); | |
121 | ), | |
122 | ||
123 | TP_printk("sig=%d group=%d errno=%d code=%d", | |
124 | __entry->sig, __entry->group, __entry->errno, __entry->code) | |
125 | ); | |
126 | ||
127 | /** | |
128 | * signal_overflow_fail - called when signal queue is overflow | |
129 | * @sig: signal number | |
130 | * @group: signal to process group or not (bool) | |
131 | * @info: pointer to struct siginfo | |
132 | * | |
133 | * Kernel fails to generate 'sig' signal with 'info' siginfo, because | |
134 | * siginfo queue is overflow, and the signal is dropped. | |
135 | * 'group' is not 0 if the signal will be sent to a process group. | |
136 | * 'sig' is always one of RT signals. | |
137 | */ | |
138 | DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail, | |
139 | ||
140 | TP_PROTO(int sig, int group, struct siginfo *info), | |
141 | ||
142 | TP_ARGS(sig, group, info) | |
143 | ); | |
144 | ||
145 | /** | |
146 | * signal_lose_info - called when siginfo is lost | |
147 | * @sig: signal number | |
148 | * @group: signal to process group or not (bool) | |
149 | * @info: pointer to struct siginfo | |
150 | * | |
151 | * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo | |
152 | * queue is overflow. | |
153 | * 'group' is not 0 if the signal will be sent to a process group. | |
154 | * 'sig' is always one of non-RT signals. | |
155 | */ | |
156 | DEFINE_EVENT(signal_queue_overflow, signal_lose_info, | |
157 | ||
158 | TP_PROTO(int sig, int group, struct siginfo *info), | |
159 | ||
160 | TP_ARGS(sig, group, info) | |
161 | ); | |
162 | ||
163 | #endif /* _TRACE_SIGNAL_H */ | |
164 | ||
165 | /* This part must be outside protection */ | |
166 | #include <trace/define_trace.h> |