Commit | Line | Data |
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9f36eaed | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0ec73ddc MD |
2 | #undef TRACE_SYSTEM |
3 | #define TRACE_SYSTEM signal | |
4 | ||
3bc29f0a MD |
5 | #if !defined(LTTNG_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ) |
6 | #define LTTNG_TRACE_SIGNAL_H | |
0ec73ddc | 7 | |
6ec43db8 | 8 | #include <probes/lttng-tracepoint-event.h> |
6bd5e64e | 9 | #include <linux/version.h> |
0ec73ddc MD |
10 | |
11 | #ifndef _TRACE_SIGNAL_DEF | |
12 | #define _TRACE_SIGNAL_DEF | |
13 | #include <linux/signal.h> | |
14 | #include <linux/sched.h> | |
f127e61e | 15 | #undef LTTNG_FIELDS_SIGINFO |
cef5d79e MJ |
16 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0)) |
17 | #define LTTNG_FIELDS_SIGINFO(info) \ | |
18 | ctf_integer(int, errno, \ | |
19 | (info == SEND_SIG_NOINFO || info == SEND_SIG_PRIV) ? \ | |
20 | 0 : \ | |
21 | info->si_errno) \ | |
22 | ctf_integer(int, code, \ | |
23 | (info == SEND_SIG_NOINFO) ? \ | |
24 | SI_USER : \ | |
25 | ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code)) | |
26 | #else /* LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) */ | |
f127e61e MD |
27 | #define LTTNG_FIELDS_SIGINFO(info) \ |
28 | ctf_integer(int, errno, \ | |
0ec73ddc MD |
29 | (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED || info == SEND_SIG_PRIV) ? \ |
30 | 0 : \ | |
31 | info->si_errno) \ | |
f127e61e | 32 | ctf_integer(int, code, \ |
0ec73ddc MD |
33 | (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED) ? \ |
34 | SI_USER : \ | |
35 | ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code)) | |
cef5d79e | 36 | #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0) */ |
0ec73ddc MD |
37 | #endif /* _TRACE_SIGNAL_DEF */ |
38 | ||
39 | /** | |
40 | * signal_generate - called when a signal is generated | |
41 | * @sig: signal number | |
42 | * @info: pointer to struct siginfo | |
43 | * @task: pointer to struct task_struct | |
44 | * | |
45 | * Current process sends a 'sig' signal to 'task' process with | |
46 | * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV, | |
47 | * 'info' is not a pointer and you can't access its field. Instead, | |
48 | * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV | |
49 | * means that si_code is SI_KERNEL. | |
50 | */ | |
b90a7f30 | 51 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0)) |
3bc29f0a | 52 | LTTNG_TRACEPOINT_EVENT(signal_generate, |
0ec73ddc | 53 | |
b90a7f30 MJ |
54 | TP_PROTO(int sig, struct kernel_siginfo *info, struct task_struct *task, |
55 | int group, int result), | |
0ec73ddc | 56 | |
b90a7f30 | 57 | TP_ARGS(sig, info, task, group, result), |
0ec73ddc | 58 | |
f127e61e MD |
59 | TP_FIELDS( |
60 | ctf_integer(int, sig, sig) | |
61 | LTTNG_FIELDS_SIGINFO(info) | |
62 | ctf_array_text(char, comm, task->comm, TASK_COMM_LEN) | |
63 | ctf_integer(pid_t, pid, task->pid) | |
b90a7f30 MJ |
64 | ctf_integer(int, group, group) |
65 | ctf_integer(int, result, result) | |
f127e61e | 66 | ) |
0ec73ddc | 67 | ) |
b90a7f30 | 68 | #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0)) |
3bc29f0a | 69 | LTTNG_TRACEPOINT_EVENT(signal_generate, |
6bd5e64e MD |
70 | |
71 | TP_PROTO(int sig, struct siginfo *info, struct task_struct *task, | |
72 | int group, int result), | |
73 | ||
74 | TP_ARGS(sig, info, task, group, result), | |
75 | ||
f127e61e MD |
76 | TP_FIELDS( |
77 | ctf_integer(int, sig, sig) | |
78 | LTTNG_FIELDS_SIGINFO(info) | |
79 | ctf_array_text(char, comm, task->comm, TASK_COMM_LEN) | |
80 | ctf_integer(pid_t, pid, task->pid) | |
81 | ctf_integer(int, group, group) | |
82 | ctf_integer(int, result, result) | |
83 | ) | |
6bd5e64e | 84 | ) |
b90a7f30 MJ |
85 | #else |
86 | LTTNG_TRACEPOINT_EVENT(signal_generate, | |
87 | ||
88 | TP_PROTO(int sig, struct siginfo *info, struct task_struct *task), | |
89 | ||
90 | TP_ARGS(sig, info, task), | |
91 | ||
92 | TP_FIELDS( | |
93 | ctf_integer(int, sig, sig) | |
94 | LTTNG_FIELDS_SIGINFO(info) | |
95 | ctf_array_text(char, comm, task->comm, TASK_COMM_LEN) | |
96 | ctf_integer(pid_t, pid, task->pid) | |
97 | ) | |
98 | ) | |
6bd5e64e | 99 | #endif |
0ec73ddc MD |
100 | |
101 | /** | |
102 | * signal_deliver - called when a signal is delivered | |
103 | * @sig: signal number | |
104 | * @info: pointer to struct siginfo | |
105 | * @ka: pointer to struct k_sigaction | |
106 | * | |
107 | * A 'sig' signal is delivered to current process with 'info' siginfo, | |
108 | * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or | |
109 | * SIG_DFL. | |
110 | * Note that some signals reported by signal_generate tracepoint can be | |
111 | * lost, ignored or modified (by debugger) before hitting this tracepoint. | |
112 | * This means, this can show which signals are actually delivered, but | |
113 | * matching generated signals and delivered signals may not be correct. | |
114 | */ | |
b90a7f30 MJ |
115 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,20,0)) |
116 | LTTNG_TRACEPOINT_EVENT(signal_deliver, | |
117 | ||
118 | TP_PROTO(int sig, struct kernel_siginfo *info, struct k_sigaction *ka), | |
119 | ||
120 | TP_ARGS(sig, info, ka), | |
121 | ||
122 | TP_FIELDS( | |
123 | ctf_integer(int, sig, sig) | |
124 | LTTNG_FIELDS_SIGINFO(info) | |
125 | ctf_integer(unsigned long, sa_handler, (unsigned long) ka->sa.sa_handler) | |
126 | ctf_integer(unsigned long, sa_flags, ka->sa.sa_flags) | |
127 | ) | |
128 | ) | |
129 | #else | |
3bc29f0a | 130 | LTTNG_TRACEPOINT_EVENT(signal_deliver, |
0ec73ddc MD |
131 | |
132 | TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka), | |
133 | ||
134 | TP_ARGS(sig, info, ka), | |
135 | ||
f127e61e MD |
136 | TP_FIELDS( |
137 | ctf_integer(int, sig, sig) | |
138 | LTTNG_FIELDS_SIGINFO(info) | |
139 | ctf_integer(unsigned long, sa_handler, (unsigned long) ka->sa.sa_handler) | |
140 | ctf_integer(unsigned long, sa_flags, ka->sa.sa_flags) | |
141 | ) | |
0ec73ddc | 142 | ) |
b90a7f30 | 143 | #endif |
0ec73ddc | 144 | |
7c68b363 | 145 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)) |
3bc29f0a | 146 | LTTNG_TRACEPOINT_EVENT_CLASS(signal_queue_overflow, |
0ec73ddc MD |
147 | |
148 | TP_PROTO(int sig, int group, struct siginfo *info), | |
149 | ||
150 | TP_ARGS(sig, group, info), | |
151 | ||
f127e61e MD |
152 | TP_FIELDS( |
153 | ctf_integer(int, sig, sig) | |
154 | ctf_integer(int, group, group) | |
155 | LTTNG_FIELDS_SIGINFO(info) | |
156 | ) | |
0ec73ddc MD |
157 | ) |
158 | ||
159 | /** | |
160 | * signal_overflow_fail - called when signal queue is overflow | |
161 | * @sig: signal number | |
162 | * @group: signal to process group or not (bool) | |
163 | * @info: pointer to struct siginfo | |
164 | * | |
165 | * Kernel fails to generate 'sig' signal with 'info' siginfo, because | |
166 | * siginfo queue is overflow, and the signal is dropped. | |
167 | * 'group' is not 0 if the signal will be sent to a process group. | |
168 | * 'sig' is always one of RT signals. | |
169 | */ | |
3bc29f0a | 170 | LTTNG_TRACEPOINT_EVENT_INSTANCE(signal_queue_overflow, signal_overflow_fail, |
0ec73ddc MD |
171 | |
172 | TP_PROTO(int sig, int group, struct siginfo *info), | |
173 | ||
174 | TP_ARGS(sig, group, info) | |
175 | ) | |
176 | ||
177 | /** | |
178 | * signal_lose_info - called when siginfo is lost | |
179 | * @sig: signal number | |
180 | * @group: signal to process group or not (bool) | |
181 | * @info: pointer to struct siginfo | |
182 | * | |
183 | * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo | |
184 | * queue is overflow. | |
185 | * 'group' is not 0 if the signal will be sent to a process group. | |
186 | * 'sig' is always one of non-RT signals. | |
187 | */ | |
3bc29f0a | 188 | LTTNG_TRACEPOINT_EVENT_INSTANCE(signal_queue_overflow, signal_lose_info, |
0ec73ddc MD |
189 | |
190 | TP_PROTO(int sig, int group, struct siginfo *info), | |
191 | ||
192 | TP_ARGS(sig, group, info) | |
193 | ) | |
7c68b363 | 194 | #endif |
0ec73ddc | 195 | |
3bc29f0a | 196 | #endif /* LTTNG_TRACE_SIGNAL_H */ |
0ec73ddc MD |
197 | |
198 | /* This part must be outside protection */ | |
6ec43db8 | 199 | #include <probes/define_trace.h> |