Merge tag 'v3.14.25' into backport/v3.14.24-ltsi-rc1+v3.14.25/snapshot-merge.wip
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / staging / lttng / instrumentation / events / lttng-module / signal.h
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 #include <linux/version.h>
9
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)                                  \
16                 tp_assign(errno,                                \
17                         (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED || info == SEND_SIG_PRIV) ? \
18                         0 :                                     \
19                         info->si_errno)                         \
20                 tp_assign(code,                                 \
21                         (info == SEND_SIG_NOINFO || info == SEND_SIG_FORCED) ? \
22                         SI_USER :                               \
23                         ((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code))
24 #endif /* _TRACE_SIGNAL_DEF */
25
26 /**
27  * signal_generate - called when a signal is generated
28  * @sig: signal number
29  * @info: pointer to struct siginfo
30  * @task: pointer to struct task_struct
31  *
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.
37  */
38 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
39 TRACE_EVENT(signal_generate,
40
41         TP_PROTO(int sig, struct siginfo *info, struct task_struct *task),
42
43         TP_ARGS(sig, info, task),
44
45         TP_STRUCT__entry(
46                 __field(        int,    sig                     )
47                 __field(        int,    errno                   )
48                 __field(        int,    code                    )
49                 __array_text(   char,   comm,   TASK_COMM_LEN   )
50                 __field(        pid_t,  pid                     )
51         ),
52
53         TP_fast_assign(
54                 tp_assign(sig, sig)
55                 TP_STORE_SIGINFO(info)
56                 tp_memcpy(comm, task->comm, TASK_COMM_LEN)
57                 tp_assign(pid, task->pid)
58         ),
59
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)
63 )
64 #else
65 TRACE_EVENT(signal_generate,
66
67         TP_PROTO(int sig, struct siginfo *info, struct task_struct *task,
68                         int group, int result),
69
70         TP_ARGS(sig, info, task, group, result),
71
72         TP_STRUCT__entry(
73                 __field(        int,    sig                     )
74                 __field(        int,    errno                   )
75                 __field(        int,    code                    )
76                 __array_text(   char,   comm,   TASK_COMM_LEN   )
77                 __field(        pid_t,  pid                     )
78                 __field(        int,    group                   )
79                 __field(        int,    result                  )
80         ),
81
82         TP_fast_assign(
83                 tp_assign(sig, sig)
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)
89         ),
90
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,
94                   __entry->result)
95 )
96 #endif
97
98 /**
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
103  *
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
106  * SIG_DFL.
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.
111  */
112 TRACE_EVENT(signal_deliver,
113
114         TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),
115
116         TP_ARGS(sig, info, ka),
117
118         TP_STRUCT__entry(
119                 __field(        int,            sig             )
120                 __field(        int,            errno           )
121                 __field(        int,            code            )
122                 __field(        unsigned long,  sa_handler      )
123                 __field(        unsigned long,  sa_flags        )
124         ),
125
126         TP_fast_assign(
127                 tp_assign(sig, sig)
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)
131         ),
132
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)
136 )
137
138 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
139 DECLARE_EVENT_CLASS(signal_queue_overflow,
140
141         TP_PROTO(int sig, int group, struct siginfo *info),
142
143         TP_ARGS(sig, group, info),
144
145         TP_STRUCT__entry(
146                 __field(        int,    sig     )
147                 __field(        int,    group   )
148                 __field(        int,    errno   )
149                 __field(        int,    code    )
150         ),
151
152         TP_fast_assign(
153                 tp_assign(sig, sig)
154                 tp_assign(group, group)
155                 TP_STORE_SIGINFO(info)
156         ),
157
158         TP_printk("sig=%d group=%d errno=%d code=%d",
159                   __entry->sig, __entry->group, __entry->errno, __entry->code)
160 )
161
162 /**
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
167  *
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.
172  */
173 DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail,
174
175         TP_PROTO(int sig, int group, struct siginfo *info),
176
177         TP_ARGS(sig, group, info)
178 )
179
180 /**
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
185  *
186  * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo
187  * queue is overflow.
188  * 'group' is not 0 if the signal will be sent to a process group.
189  * 'sig' is always one of non-RT signals.
190  */
191 DEFINE_EVENT(signal_queue_overflow, signal_lose_info,
192
193         TP_PROTO(int sig, int group, struct siginfo *info),
194
195         TP_ARGS(sig, group, info)
196 )
197 #endif
198
199 #endif /* _TRACE_SIGNAL_H */
200
201 /* This part must be outside protection */
202 #include "../../../probes/define_trace.h"