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/tracepoint.h> | |
8 | ||
9 | #ifndef _TRACE_SIGNAL_DEF | |
10 | #define _TRACE_SIGNAL_DEF | |
11 | #include <linux/signal.h> | |
12 | #include <linux/sched.h> | |
f97eaafb | 13 | #undef TP_STORE_SIGINFO |
0ec73ddc MD |
14 | #define TP_STORE_SIGINFO(info) \ |
15 | tp_assign(errno, \ | |
16 | (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED || info == SEND_SIG_PRIV) ? \ | |
17 | 0 : \ | |
18 | info->si_errno) \ | |
19 | tp_assign(code, \ | |
20 | (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED) ? \ | |
21 | SI_USER : \ | |
22 | ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code)) | |
23 | #endif /* _TRACE_SIGNAL_DEF */ | |
24 | ||
25 | /** | |
26 | * signal_generate - called when a signal is generated | |
27 | * @sig: signal number | |
28 | * @info: pointer to struct siginfo | |
29 | * @task: pointer to struct task_struct | |
30 | * | |
31 | * Current process sends a 'sig' signal to 'task' process with | |
32 | * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV, | |
33 | * 'info' is not a pointer and you can't access its field. Instead, | |
34 | * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV | |
35 | * means that si_code is SI_KERNEL. | |
36 | */ | |
37 | TRACE_EVENT(signal_generate, | |
38 | ||
39 | TP_PROTO(int sig, struct siginfo *info, struct task_struct *task), | |
40 | ||
41 | TP_ARGS(sig, info, task), | |
42 | ||
43 | TP_STRUCT__entry( | |
44 | __field( int, sig ) | |
45 | __field( int, errno ) | |
46 | __field( int, code ) | |
47 | __array( char, comm, TASK_COMM_LEN ) | |
48 | __field( pid_t, pid ) | |
49 | ), | |
50 | ||
51 | TP_fast_assign( | |
52 | tp_assign(sig, sig) | |
53 | TP_STORE_SIGINFO(info) | |
54 | tp_memcpy(comm, task->comm, TASK_COMM_LEN) | |
55 | tp_assign(pid, task->pid) | |
56 | ), | |
57 | ||
58 | TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d", | |
59 | __entry->sig, __entry->errno, __entry->code, | |
60 | __entry->comm, __entry->pid) | |
61 | ) | |
62 | ||
63 | /** | |
64 | * signal_deliver - called when a signal is delivered | |
65 | * @sig: signal number | |
66 | * @info: pointer to struct siginfo | |
67 | * @ka: pointer to struct k_sigaction | |
68 | * | |
69 | * A 'sig' signal is delivered to current process with 'info' siginfo, | |
70 | * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or | |
71 | * SIG_DFL. | |
72 | * Note that some signals reported by signal_generate tracepoint can be | |
73 | * lost, ignored or modified (by debugger) before hitting this tracepoint. | |
74 | * This means, this can show which signals are actually delivered, but | |
75 | * matching generated signals and delivered signals may not be correct. | |
76 | */ | |
77 | TRACE_EVENT(signal_deliver, | |
78 | ||
79 | TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka), | |
80 | ||
81 | TP_ARGS(sig, info, ka), | |
82 | ||
83 | TP_STRUCT__entry( | |
84 | __field( int, sig ) | |
85 | __field( int, errno ) | |
86 | __field( int, code ) | |
87 | __field( unsigned long, sa_handler ) | |
88 | __field( unsigned long, sa_flags ) | |
89 | ), | |
90 | ||
91 | TP_fast_assign( | |
92 | tp_assign(sig, sig) | |
93 | TP_STORE_SIGINFO(info) | |
94 | tp_assign(sa_handler, (unsigned long)ka->sa.sa_handler) | |
95 | tp_assign(sa_flags, ka->sa.sa_flags) | |
96 | ), | |
97 | ||
98 | TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx", | |
99 | __entry->sig, __entry->errno, __entry->code, | |
100 | __entry->sa_handler, __entry->sa_flags) | |
101 | ) | |
102 | ||
103 | DECLARE_EVENT_CLASS(signal_queue_overflow, | |
104 | ||
105 | TP_PROTO(int sig, int group, struct siginfo *info), | |
106 | ||
107 | TP_ARGS(sig, group, info), | |
108 | ||
109 | TP_STRUCT__entry( | |
110 | __field( int, sig ) | |
111 | __field( int, group ) | |
112 | __field( int, errno ) | |
113 | __field( int, code ) | |
114 | ), | |
115 | ||
116 | TP_fast_assign( | |
117 | tp_assign(sig, sig) | |
118 | tp_assign(group, group) | |
119 | TP_STORE_SIGINFO(info) | |
120 | ), | |
121 | ||
122 | TP_printk("sig=%d group=%d errno=%d code=%d", | |
123 | __entry->sig, __entry->group, __entry->errno, __entry->code) | |
124 | ) | |
125 | ||
126 | /** | |
127 | * signal_overflow_fail - called when signal queue is overflow | |
128 | * @sig: signal number | |
129 | * @group: signal to process group or not (bool) | |
130 | * @info: pointer to struct siginfo | |
131 | * | |
132 | * Kernel fails to generate 'sig' signal with 'info' siginfo, because | |
133 | * siginfo queue is overflow, and the signal is dropped. | |
134 | * 'group' is not 0 if the signal will be sent to a process group. | |
135 | * 'sig' is always one of RT signals. | |
136 | */ | |
137 | DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail, | |
138 | ||
139 | TP_PROTO(int sig, int group, struct siginfo *info), | |
140 | ||
141 | TP_ARGS(sig, group, info) | |
142 | ) | |
143 | ||
144 | /** | |
145 | * signal_lose_info - called when siginfo is lost | |
146 | * @sig: signal number | |
147 | * @group: signal to process group or not (bool) | |
148 | * @info: pointer to struct siginfo | |
149 | * | |
150 | * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo | |
151 | * queue is overflow. | |
152 | * 'group' is not 0 if the signal will be sent to a process group. | |
153 | * 'sig' is always one of non-RT signals. | |
154 | */ | |
155 | DEFINE_EVENT(signal_queue_overflow, signal_lose_info, | |
156 | ||
157 | TP_PROTO(int sig, int group, struct siginfo *info), | |
158 | ||
159 | TP_ARGS(sig, group, info) | |
160 | ) | |
161 | ||
162 | #endif /* _TRACE_SIGNAL_H */ | |
163 | ||
164 | /* This part must be outside protection */ | |
165 | #include "../../../probes/define_trace.h" |