2 #define TRACE_SYSTEM signal
4 #if !defined(LTTNG_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
5 #define LTTNG_TRACE_SIGNAL_H
7 #include <probes/lttng-tracepoint-event.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 LTTNG_FIELDS_SIGINFO
15 #define LTTNG_FIELDS_SIGINFO(info) \
16 ctf_integer(int, errno, \
17 (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED || info == SEND_SIG_PRIV) ? \
20 ctf_integer(int, code, \
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(4,20,0))
39 LTTNG_TRACEPOINT_EVENT(signal_generate
,
41 TP_PROTO(int sig
, struct kernel_siginfo
*info
, struct task_struct
*task
,
42 int group
, int result
),
44 TP_ARGS(sig
, info
, task
, group
, result
),
47 ctf_integer(int, sig
, sig
)
48 LTTNG_FIELDS_SIGINFO(info
)
49 ctf_array_text(char, comm
, task
->comm
, TASK_COMM_LEN
)
50 ctf_integer(pid_t
, pid
, task
->pid
)
51 ctf_integer(int, group
, group
)
52 ctf_integer(int, result
, result
)
55 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
56 LTTNG_TRACEPOINT_EVENT(signal_generate
,
58 TP_PROTO(int sig
, struct siginfo
*info
, struct task_struct
*task
,
59 int group
, int result
),
61 TP_ARGS(sig
, info
, task
, group
, result
),
64 ctf_integer(int, sig
, sig
)
65 LTTNG_FIELDS_SIGINFO(info
)
66 ctf_array_text(char, comm
, task
->comm
, TASK_COMM_LEN
)
67 ctf_integer(pid_t
, pid
, task
->pid
)
68 ctf_integer(int, group
, group
)
69 ctf_integer(int, result
, result
)
73 LTTNG_TRACEPOINT_EVENT(signal_generate
,
75 TP_PROTO(int sig
, struct siginfo
*info
, struct task_struct
*task
),
77 TP_ARGS(sig
, info
, task
),
80 ctf_integer(int, sig
, sig
)
81 LTTNG_FIELDS_SIGINFO(info
)
82 ctf_array_text(char, comm
, task
->comm
, TASK_COMM_LEN
)
83 ctf_integer(pid_t
, pid
, task
->pid
)
89 * signal_deliver - called when a signal is delivered
91 * @info: pointer to struct siginfo
92 * @ka: pointer to struct k_sigaction
94 * A 'sig' signal is delivered to current process with 'info' siginfo,
95 * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
97 * Note that some signals reported by signal_generate tracepoint can be
98 * lost, ignored or modified (by debugger) before hitting this tracepoint.
99 * This means, this can show which signals are actually delivered, but
100 * matching generated signals and delivered signals may not be correct.
102 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0))
103 LTTNG_TRACEPOINT_EVENT(signal_deliver
,
105 TP_PROTO(int sig
, struct kernel_siginfo
*info
, struct k_sigaction
*ka
),
107 TP_ARGS(sig
, info
, ka
),
110 ctf_integer(int, sig
, sig
)
111 LTTNG_FIELDS_SIGINFO(info
)
112 ctf_integer(unsigned long, sa_handler
, (unsigned long) ka
->sa
.sa_handler
)
113 ctf_integer(unsigned long, sa_flags
, ka
->sa
.sa_flags
)
117 LTTNG_TRACEPOINT_EVENT(signal_deliver
,
119 TP_PROTO(int sig
, struct siginfo
*info
, struct k_sigaction
*ka
),
121 TP_ARGS(sig
, info
, ka
),
124 ctf_integer(int, sig
, sig
)
125 LTTNG_FIELDS_SIGINFO(info
)
126 ctf_integer(unsigned long, sa_handler
, (unsigned long) ka
->sa
.sa_handler
)
127 ctf_integer(unsigned long, sa_flags
, ka
->sa
.sa_flags
)
132 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
133 LTTNG_TRACEPOINT_EVENT_CLASS(signal_queue_overflow
,
135 TP_PROTO(int sig
, int group
, struct siginfo
*info
),
137 TP_ARGS(sig
, group
, info
),
140 ctf_integer(int, sig
, sig
)
141 ctf_integer(int, group
, group
)
142 LTTNG_FIELDS_SIGINFO(info
)
147 * signal_overflow_fail - called when signal queue is overflow
148 * @sig: signal number
149 * @group: signal to process group or not (bool)
150 * @info: pointer to struct siginfo
152 * Kernel fails to generate 'sig' signal with 'info' siginfo, because
153 * siginfo queue is overflow, and the signal is dropped.
154 * 'group' is not 0 if the signal will be sent to a process group.
155 * 'sig' is always one of RT signals.
157 LTTNG_TRACEPOINT_EVENT_INSTANCE(signal_queue_overflow
, signal_overflow_fail
,
159 TP_PROTO(int sig
, int group
, struct siginfo
*info
),
161 TP_ARGS(sig
, group
, info
)
165 * signal_lose_info - called when siginfo is lost
166 * @sig: signal number
167 * @group: signal to process group or not (bool)
168 * @info: pointer to struct siginfo
170 * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo
172 * 'group' is not 0 if the signal will be sent to a process group.
173 * 'sig' is always one of non-RT signals.
175 LTTNG_TRACEPOINT_EVENT_INSTANCE(signal_queue_overflow
, signal_lose_info
,
177 TP_PROTO(int sig
, int group
, struct siginfo
*info
),
179 TP_ARGS(sig
, group
, info
)
183 #endif /* LTTNG_TRACE_SIGNAL_H */
185 /* This part must be outside protection */
186 #include <probes/define_trace.h>
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