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

/* SPDX-License-Identifier: GPL-2.0 */
#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 ||			\
		    info == SEND_SIG_FORCED) {			\
			__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)

#ifndef TRACE_HEADER_MULTI_READ
enum {
	TRACE_SIGNAL_DELIVERED,
	TRACE_SIGNAL_IGNORED,
	TRACE_SIGNAL_ALREADY_PENDING,
	TRACE_SIGNAL_OVERFLOW_FAIL,
	TRACE_SIGNAL_LOSE_INFO,
};
#endif

/**
 * signal_generate - called when a signal is generated
 * @sig: signal number
 * @info: pointer to struct siginfo
 * @task: pointer to struct task_struct
 * @group: shared or private
 * @result: TRACE_SIGNAL_*
 *
 * 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,
			int group, int result),

	TP_ARGS(sig, info, task, group, result),

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

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

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

/**
 * 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)
);

#endif /* _TRACE_SIGNAL_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
d1eb650f MH	2	#undef TRACE_SYSTEM
	3	#define TRACE_SYSTEM signal
	4
	5	#if !defined(_TRACE_SIGNAL_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	6	#define _TRACE_SIGNAL_H
	7
	8	#include <linux/signal.h>
	9	#include <linux/sched.h>
	10	#include <linux/tracepoint.h>
	11
	12	#define TP_STORE_SIGINFO(__entry, info) \
	13	do { \
b9b76dfa ON	14	if (info == SEND_SIG_NOINFO \|\| \
b9b76dfa ON	15	info == SEND_SIG_FORCED) { \
d1eb650f MH	16	__entry->errno = 0; \
	17	__entry->code = SI_USER; \
	18	} else if (info == SEND_SIG_PRIV) { \
	19	__entry->errno = 0; \
	20	__entry->code = SI_KERNEL; \
	21	} else { \
	22	__entry->errno = info->si_errno; \
	23	__entry->code = info->si_code; \
	24	} \
	25	} while (0)
	26
6c303d3a ON	27	#ifndef TRACE_HEADER_MULTI_READ
	28	enum {
	29	TRACE_SIGNAL_DELIVERED,
	30	TRACE_SIGNAL_IGNORED,
	31	TRACE_SIGNAL_ALREADY_PENDING,
	32	TRACE_SIGNAL_OVERFLOW_FAIL,
	33	TRACE_SIGNAL_LOSE_INFO,
	34	};
	35	#endif
	36
d1eb650f MH	37	/**
	38	* signal_generate - called when a signal is generated
	39	* @sig: signal number
	40	* @info: pointer to struct siginfo
	41	* @task: pointer to struct task_struct
6c303d3a ON	42	* @group: shared or private
6c303d3a ON	43	* @result: TRACE_SIGNAL_*
d1eb650f MH	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	*/
	51	TRACE_EVENT(signal_generate,
	52
6c303d3a ON	53	TP_PROTO(int sig, struct siginfo info, struct task_struct task,
6c303d3a ON	54	int group, int result),
d1eb650f	55
6c303d3a	56	TP_ARGS(sig, info, task, group, result),
d1eb650f MH	57
	58	TP_STRUCT__entry(
	59	__field( int, sig )
	60	__field( int, errno )
	61	__field( int, code )
	62	__array( char, comm, TASK_COMM_LEN )
	63	__field( pid_t, pid )
6c303d3a ON	64	__field( int, group )
6c303d3a ON	65	__field( int, result )
d1eb650f MH	66	),
	67
	68	TP_fast_assign(
	69	__entry->sig = sig;
	70	TP_STORE_SIGINFO(__entry, info);
	71	memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
	72	__entry->pid = task->pid;
6c303d3a ON	73	__entry->group = group;
6c303d3a ON	74	__entry->result = result;
d1eb650f MH	75	),
d1eb650f MH	76
6c303d3a	77	TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d",
d1eb650f	78	__entry->sig, __entry->errno, __entry->code,
6c303d3a ON	79	__entry->comm, __entry->pid, __entry->group,
6c303d3a ON	80	__entry->result)
d1eb650f MH	81	);
d1eb650f MH	82
f9d4257e MH	83	/**
	84	* signal_deliver - called when a signal is delivered
	85	* @sig: signal number
	86	* @info: pointer to struct siginfo
	87	* @ka: pointer to struct k_sigaction
	88	*
	89	* A 'sig' signal is delivered to current process with 'info' siginfo,
	90	* and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
	91	* SIG_DFL.
	92	* Note that some signals reported by signal_generate tracepoint can be
	93	* lost, ignored or modified (by debugger) before hitting this tracepoint.
	94	* This means, this can show which signals are actually delivered, but
	95	* matching generated signals and delivered signals may not be correct.
	96	*/
	97	TRACE_EVENT(signal_deliver,
	98
	99	TP_PROTO(int sig, struct siginfo info, struct k_sigaction ka),
	100
	101	TP_ARGS(sig, info, ka),
	102
	103	TP_STRUCT__entry(
	104	__field( int, sig )
	105	__field( int, errno )
	106	__field( int, code )
	107	__field( unsigned long, sa_handler )
	108	__field( unsigned long, sa_flags )
	109	),
	110
	111	TP_fast_assign(
	112	__entry->sig = sig;
	113	TP_STORE_SIGINFO(__entry, info);
	114	__entry->sa_handler = (unsigned long)ka->sa.sa_handler;
	115	__entry->sa_flags = ka->sa.sa_flags;
	116	),
	117
	118	TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
	119	__entry->sig, __entry->errno, __entry->code,
	120	__entry->sa_handler, __entry->sa_flags)
	121	);
ba005e1f	122
d1eb650f MH	123	#endif /* _TRACE_SIGNAL_H */
	124
	125	/* This part must be outside protection */
	126	#include <trace/define_trace.h>