[mirror_ubuntu-bionic-kernel.git] / include / trace / events / signal.h

#undef TRACE_SYSTEM
#define TRACE_SYSTEM signal

#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_SIGNAL_H

#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/tracepoint.h>

#define TP_STORE_SIGINFO(__entry, info)				\
	do {							\
		if (info == SEND_SIG_NOINFO) {			\
			__entry->errno	= 0;			\
			__entry->code	= SI_USER;		\
		} else if (info == SEND_SIG_PRIV) {		\
			__entry->errno	= 0;			\
			__entry->code	= SI_KERNEL;		\
		} else {					\
			__entry->errno	= info->si_errno;	\
			__entry->code	= info->si_code;	\
		}						\
	} while (0)

/**
 * signal_generate - called when a signal is generated
 * @sig: signal number
 * @info: pointer to struct siginfo
 * @task: pointer to struct task_struct
 *
 * Current process sends a 'sig' signal to 'task' process with
 * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,
 * 'info' is not a pointer and you can't access its field. Instead,
 * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV
 * means that si_code is SI_KERNEL.
 */
TRACE_EVENT(signal_generate,

	TP_PROTO(int sig, struct siginfo *info, struct task_struct *task),

	TP_ARGS(sig, info, task),

	TP_STRUCT__entry(
		__field(	int,	sig			)
		__field(	int,	errno			)
		__field(	int,	code			)
		__array(	char,	comm,	TASK_COMM_LEN	)
		__field(	pid_t,	pid			)
	),

	TP_fast_assign(
		__entry->sig	= sig;
		TP_STORE_SIGINFO(__entry, info);
		memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
		__entry->pid	= task->pid;
	),

	TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d",
		  __entry->sig, __entry->errno, __entry->code,
		  __entry->comm, __entry->pid)
);

/**
 * signal_deliver - called when a signal is delivered
 * @sig: signal number
 * @info: pointer to struct siginfo
 * @ka: pointer to struct k_sigaction
 *
 * A 'sig' signal is delivered to current process with 'info' siginfo,
 * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
 * SIG_DFL.
 * Note that some signals reported by signal_generate tracepoint can be
 * lost, ignored or modified (by debugger) before hitting this tracepoint.
 * This means, this can show which signals are actually delivered, but
 * matching generated signals and delivered signals may not be correct.
 */
TRACE_EVENT(signal_deliver,

	TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),

	TP_ARGS(sig, info, ka),

	TP_STRUCT__entry(
		__field(	int,		sig		)
		__field(	int,		errno		)
		__field(	int,		code		)
		__field(	unsigned long,	sa_handler	)
		__field(	unsigned long,	sa_flags	)
	),

	TP_fast_assign(
		__entry->sig	= sig;
		TP_STORE_SIGINFO(__entry, info);
		__entry->sa_handler	= (unsigned long)ka->sa.sa_handler;
		__entry->sa_flags	= ka->sa.sa_flags;
	),

	TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
		  __entry->sig, __entry->errno, __entry->code,
		  __entry->sa_handler, __entry->sa_flags)
);

DECLARE_EVENT_CLASS(signal_queue_overflow,

	TP_PROTO(int sig, int group, struct siginfo *info),

	TP_ARGS(sig, group, info),

	TP_STRUCT__entry(
		__field(	int,	sig	)
		__field(	int,	group	)
		__field(	int,	errno	)
		__field(	int,	code	)
	),

	TP_fast_assign(
		__entry->sig	= sig;
		__entry->group	= group;
		TP_STORE_SIGINFO(__entry, info);
	),

	TP_printk("sig=%d group=%d errno=%d code=%d",
		  __entry->sig, __entry->group, __entry->errno, __entry->code)
);

/**
 * signal_overflow_fail - called when signal queue is overflow
 * @sig: signal number
 * @group: signal to process group or not (bool)
 * @info: pointer to struct siginfo
 *
 * Kernel fails to generate 'sig' signal with 'info' siginfo, because
 * siginfo queue is overflow, and the signal is dropped.
 * 'group' is not 0 if the signal will be sent to a process group.
 * 'sig' is always one of RT signals.
 */
DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail,

	TP_PROTO(int sig, int group, struct siginfo *info),

	TP_ARGS(sig, group, info)
);

/**
 * signal_lose_info - called when siginfo is lost
 * @sig: signal number
 * @group: signal to process group or not (bool)
 * @info: pointer to struct siginfo
 *
 * Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo
 * queue is overflow.
 * 'group' is not 0 if the signal will be sent to a process group.
 * 'sig' is always one of non-RT signals.
 */
DEFINE_EVENT(signal_queue_overflow, signal_lose_info,

	TP_PROTO(int sig, int group, struct siginfo *info),

	TP_ARGS(sig, group, info)
);

#endif /* _TRACE_SIGNAL_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
Commit	Line	Data
d1eb650f MH	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/signal.h>
	8	#include <linux/sched.h>
	9	#include <linux/tracepoint.h>
	10
	11	#define TP_STORE_SIGINFO(__entry, info) \
	12	do { \
	13	if (info == SEND_SIG_NOINFO) { \
	14	__entry->errno = 0; \
	15	__entry->code = SI_USER; \
	16	} else if (info == SEND_SIG_PRIV) { \
	17	__entry->errno = 0; \
	18	__entry->code = SI_KERNEL; \
	19	} else { \
	20	__entry->errno = info->si_errno; \
	21	__entry->code = info->si_code; \
	22	} \
	23	} while (0)
	24
	25	/**
	26	* signal_generate - called when a signal is generated
	27	* @sig: signal number
	28	* @info: pointer to struct siginfo
	29	* @task: pointer to struct task_struct
	30	*
	31	* Current process sends a 'sig' signal to 'task' process with
	32	* 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,
	33	* 'info' is not a pointer and you can't access its field. Instead,
	34	* SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV
	35	* means that si_code is SI_KERNEL.
	36	*/
	37	TRACE_EVENT(signal_generate,
	38
	39	TP_PROTO(int sig, struct siginfo info, struct task_struct task),
	40
	41	TP_ARGS(sig, info, task),
	42
	43	TP_STRUCT__entry(
	44	__field( int, sig )
	45	__field( int, errno )
	46	__field( int, code )
	47	__array( char, comm, TASK_COMM_LEN )
	48	__field( pid_t, pid )
	49	),
	50
	51	TP_fast_assign(
	52	__entry->sig = sig;
	53	TP_STORE_SIGINFO(__entry, info);
	54	memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
	55	__entry->pid = task->pid;
	56	),
	57
	58	TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d",
	59	__entry->sig, __entry->errno, __entry->code,
	60	__entry->comm, __entry->pid)
	61	);
	62
f9d4257e MH	63	/**
	64	* signal_deliver - called when a signal is delivered
	65	* @sig: signal number
	66	* @info: pointer to struct siginfo
	67	* @ka: pointer to struct k_sigaction
	68	*
	69	* A 'sig' signal is delivered to current process with 'info' siginfo,
	70	* and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
	71	* SIG_DFL.
	72	* Note that some signals reported by signal_generate tracepoint can be
	73	* lost, ignored or modified (by debugger) before hitting this tracepoint.
	74	* This means, this can show which signals are actually delivered, but
	75	* matching generated signals and delivered signals may not be correct.
	76	*/
	77	TRACE_EVENT(signal_deliver,
	78
	79	TP_PROTO(int sig, struct siginfo info, struct k_sigaction ka),
	80
	81	TP_ARGS(sig, info, ka),
	82
	83	TP_STRUCT__entry(
	84	__field( int, sig )
	85	__field( int, errno )
	86	__field( int, code )
	87	__field( unsigned long, sa_handler )
	88	__field( unsigned long, sa_flags )
	89	),
	90
	91	TP_fast_assign(
	92	__entry->sig = sig;
	93	TP_STORE_SIGINFO(__entry, info);
	94	__entry->sa_handler = (unsigned long)ka->sa.sa_handler;
	95	__entry->sa_flags = ka->sa.sa_flags;
	96	),
	97
	98	TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
	99	__entry->sig, __entry->errno, __entry->code,
	100	__entry->sa_handler, __entry->sa_flags)
	101	);
ba005e1f	102
4bdde044	103	DECLARE_EVENT_CLASS(signal_queue_overflow,
ba005e1f MH	104
	105	TP_PROTO(int sig, int group, struct siginfo *info),
	106
	107	TP_ARGS(sig, group, info),
	108
	109	TP_STRUCT__entry(
	110	__field( int, sig )
	111	__field( int, group )
	112	__field( int, errno )
	113	__field( int, code )
	114	),
	115
	116	TP_fast_assign(
	117	__entry->sig = sig;
	118	__entry->group = group;
	119	TP_STORE_SIGINFO(__entry, info);
	120	),
	121
	122	TP_printk("sig=%d group=%d errno=%d code=%d",
	123	__entry->sig, __entry->group, __entry->errno, __entry->code)
	124	);
	125
4bdde044 LZ	126	/**
	127	* signal_overflow_fail - called when signal queue is overflow
	128	* @sig: signal number
	129	* @group: signal to process group or not (bool)
	130	* @info: pointer to struct siginfo
	131	*
	132	* Kernel fails to generate 'sig' signal with 'info' siginfo, because
	133	* siginfo queue is overflow, and the signal is dropped.
	134	* 'group' is not 0 if the signal will be sent to a process group.
	135	* 'sig' is always one of RT signals.
	136	*/
	137	DEFINE_EVENT(signal_queue_overflow, signal_overflow_fail,
	138
	139	TP_PROTO(int sig, int group, struct siginfo *info),
	140
	141	TP_ARGS(sig, group, info)
	142	);
	143
ba005e1f MH	144	/**
	145	* signal_lose_info - called when siginfo is lost
	146	* @sig: signal number
	147	* @group: signal to process group or not (bool)
	148	* @info: pointer to struct siginfo
	149	*
	150	* Kernel generates 'sig' signal but loses 'info' siginfo, because siginfo
	151	* queue is overflow.
	152	* 'group' is not 0 if the signal will be sent to a process group.
	153	* 'sig' is always one of non-RT signals.
	154	*/
4bdde044	155	DEFINE_EVENT(signal_queue_overflow, signal_lose_info,
ba005e1f MH	156
	157	TP_PROTO(int sig, int group, struct siginfo *info),
	158
4bdde044	159	TP_ARGS(sig, group, info)
ba005e1f	160	);
4bdde044	161
d1eb650f MH	162	#endif /* _TRACE_SIGNAL_H */
	163
	164	/* This part must be outside protection */
	165	#include <trace/define_trace.h>