2 #define TRACE_SYSTEM signal
4 #if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
5 #define _TRACE_SIGNAL_H
7 #include <linux/tracepoint.h>
8 #include <linux/version.h>
10 #ifndef _TRACE_SIGNAL_DEF
11 #define _TRACE_SIGNAL_DEF
12 #include <linux/signal.h>
13 #include <linux/sched.h>
14 #undef TP_STORE_SIGINFO
15 #define TP_STORE_SIGINFO(info) \
17 (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED || info == SEND_SIG_PRIV) ? \
21 (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED) ? \
23 ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code))
24 #endif /* _TRACE_SIGNAL_DEF */
27 * signal_generate - called when a signal is generated
29 * @info: pointer to struct siginfo
30 * @task: pointer to struct task_struct
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.
38 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
39 TRACE_EVENT(signal_generate,
41 TP_PROTO(int sig, struct siginfo *info, struct task_struct *task),
43 TP_ARGS(sig, info, task),
49 __array_text( char, comm, TASK_COMM_LEN )
55 TP_STORE_SIGINFO(info)
56 tp_memcpy(comm, task->comm, TASK_COMM_LEN)
57 tp_assign(pid, task->pid)
60 TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d",
61 __entry->sig, __entry->errno, __entry->code,
62 __entry->comm, __entry->pid)
65 TRACE_EVENT(signal_generate,
67 TP_PROTO(int sig, struct siginfo *info, struct task_struct *task,
68 int group, int result),
70 TP_ARGS(sig, info, task, group, result),
76 __array_text( char, comm, TASK_COMM_LEN )
79 __field( int, result )
84 TP_STORE_SIGINFO(info)
85 tp_memcpy(comm, task->comm, TASK_COMM_LEN)
86 tp_assign(pid, task->pid)
87 tp_assign(group, group)
88 tp_assign(result, result)
91 TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d",
92 __entry->sig, __entry->errno, __entry->code,
93 __entry->comm, __entry->pid, __entry->group,
99 * signal_deliver - called when a signal is delivered
100 * @sig: signal number
101 * @info: pointer to struct siginfo
102 * @ka: pointer to struct k_sigaction
104 * A 'sig' signal is delivered to current process with 'info' siginfo,
105 * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
107 * Note that some signals reported by signal_generate tracepoint can be
108 * lost, ignored or modified (by debugger) before hitting this tracepoint.
109 * This means, this can show which signals are actually delivered, but
110 * matching generated signals and delivered signals may not be correct.
112 TRACE_EVENT(signal_deliver,
114 TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),
116 TP_ARGS(sig, info, ka),
120 __field( int, errno )
122 __field( unsigned long, sa_handler )
123 __field( unsigned long, sa_flags )
128 TP_STORE_SIGINFO(info)
129 tp_assign(sa_handler, (unsigned long)ka->sa.sa_handler)
130 tp_assign(sa_flags, ka->sa.sa_flags)
133 TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
134 __entry->sig, __entry->errno, __entry->code,
135 __entry->sa_handler, __entry->sa_flags)
138 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
139 DECLARE_EVENT_CLASS(signal_queue_overflow,
141 TP_PROTO(int sig, int group, struct siginfo *info),
143 TP_ARGS(sig, group, info),
147 __field( int, group )
148 __field( int, errno )
154 tp_assign(group, group)
155 TP_STORE_SIGINFO(info)
158 TP_printk("sig=%d group=%d errno=%d code=%d",
159 __entry->sig, __entry->group, __entry->errno, __entry->code)
163 * signal_overflow_fail - called when signal queue is overflow
164 * @sig: signal number
165 * @group: signal to process group or not (bool)
166 * @info: pointer to struct siginfo
168 * Kernel fails to generate 'sig' signal with 'info' siginfo, because
169 * siginfo queue is overflow, and the signal is dropped.
170 * 'group' is not 0 if the signal will be sent to a process group.
171 * 'sig' is always one of RT signals.
173 DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail,
175 TP_PROTO(int sig, int group, struct siginfo *info),
177 TP_ARGS(sig, group, info)
181 * signal_lose_info - called when siginfo is lost
182 * @sig: signal number
183 * @group: signal to process group or not (bool)
184 * @info: pointer to struct siginfo
186 * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo
188 * 'group' is not 0 if the signal will be sent to a process group.
189 * 'sig' is always one of non-RT signals.
191 DEFINE_EVENT(signal_queue_overflow, signal_lose_info,
193 TP_PROTO(int sig, int group, struct siginfo *info),
195 TP_ARGS(sig, group, info)
199 #endif /* _TRACE_SIGNAL_H */
201 /* This part must be outside protection */
202 #include "../../../probes/define_trace.h"