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