[lttng-modules.git] / instrumentation / events / lttng-module / signal.h

/* SPDX-License-Identifier: GPL-2.0-only */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM signal

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

#include <probes/lttng-tracepoint-event.h>

#ifndef _TRACE_SIGNAL_DEF
#define _TRACE_SIGNAL_DEF
#include <linux/signal.h>
#include <linux/sched.h>
#undef LTTNG_FIELDS_SIGINFO
#define LTTNG_FIELDS_SIGINFO(info)				\
		ctf_integer(int, errno,				\
			(info == SEND_SIG_NOINFO || info == SEND_SIG_PRIV) ? \
			0 :					\
			info->si_errno)				\
		ctf_integer(int, code,				\
			(info == SEND_SIG_NOINFO) ? 		\
			SI_USER : 				\
			((info == SEND_SIG_PRIV) ? SI_KERNEL : info->si_code))
#endif /* _TRACE_SIGNAL_DEF */

/**
 * 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.
 */
LTTNG_TRACEPOINT_EVENT(signal_generate,

	TP_PROTO(int sig, struct kernel_siginfo *info, struct task_struct *task,
			int group, int result),

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

	TP_FIELDS(
		ctf_integer(int, sig, sig)
		LTTNG_FIELDS_SIGINFO(info)
		ctf_array_text(char, comm, task->comm, TASK_COMM_LEN)
		ctf_integer(pid_t, pid, task->pid)
		ctf_integer(int, group, group)
		ctf_integer(int, result, 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.
 */
LTTNG_TRACEPOINT_EVENT(signal_deliver,

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

	TP_ARGS(sig, info, ka),

	TP_FIELDS(
		ctf_integer(int, sig, sig)
		LTTNG_FIELDS_SIGINFO(info)
		ctf_integer(unsigned long, sa_handler, (unsigned long) ka->sa.sa_handler)
		ctf_integer(unsigned long, sa_flags, ka->sa.sa_flags)
	)
)

#endif /* LTTNG_TRACE_SIGNAL_H */

/* This part must be outside protection */
#include <probes/define_trace.h>
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	#undef TRACE_SYSTEM
	3	#define TRACE_SYSTEM signal
	4
	5	#if !defined(LTTNG_TRACE_SIGNAL_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	6	#define LTTNG_TRACE_SIGNAL_H
	7
	8	#include <probes/lttng-tracepoint-event.h>
	9
	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_PRIV) ? \
	18	0 : \
	19	info->si_errno) \
	20	ctf_integer(int, code, \
	21	(info == SEND_SIG_NOINFO) ? \
	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	LTTNG_TRACEPOINT_EVENT(signal_generate,
	39
	40	TP_PROTO(int sig, struct kernel_siginfo info, struct task_struct task,
	41	int group, int result),
	42
	43	TP_ARGS(sig, info, task, group, result),
	44
	45	TP_FIELDS(
	46	ctf_integer(int, sig, sig)
	47	LTTNG_FIELDS_SIGINFO(info)
	48	ctf_array_text(char, comm, task->comm, TASK_COMM_LEN)
	49	ctf_integer(pid_t, pid, task->pid)
	50	ctf_integer(int, group, group)
	51	ctf_integer(int, result, result)
	52	)
	53	)
	54
	55	/**
	56	* signal_deliver - called when a signal is delivered
	57	* @sig: signal number
	58	* @info: pointer to struct siginfo
	59	* @ka: pointer to struct k_sigaction
	60	*
	61	* A 'sig' signal is delivered to current process with 'info' siginfo,
	62	* and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
	63	* SIG_DFL.
	64	* Note that some signals reported by signal_generate tracepoint can be
	65	* lost, ignored or modified (by debugger) before hitting this tracepoint.
	66	* This means, this can show which signals are actually delivered, but
	67	* matching generated signals and delivered signals may not be correct.
	68	*/
	69	LTTNG_TRACEPOINT_EVENT(signal_deliver,
	70
	71	TP_PROTO(int sig, struct kernel_siginfo info, struct k_sigaction ka),
	72
	73	TP_ARGS(sig, info, ka),
	74
	75	TP_FIELDS(
	76	ctf_integer(int, sig, sig)
	77	LTTNG_FIELDS_SIGINFO(info)
	78	ctf_integer(unsigned long, sa_handler, (unsigned long) ka->sa.sa_handler)
	79	ctf_integer(unsigned long, sa_flags, ka->sa.sa_flags)
	80	)
	81	)
	82
	83	#endif /* LTTNG_TRACE_SIGNAL_H */
	84
	85	/* This part must be outside protection */
	86	#include <probes/define_trace.h>