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brintos / linux-shallow public Read only

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1/* SPDX-License-Identifier: GPL-2.0 */2#undef TRACE_SYSTEM3#define TRACE_SYSTEM signal4 5#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)6#define _TRACE_SIGNAL_H7 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 {							\14		if (info == SEND_SIG_NOINFO) {			\15			__entry->errno	= 0;			\16			__entry->code	= SI_USER;		\17		} else if (info == SEND_SIG_PRIV) {		\18			__entry->errno	= 0;			\19			__entry->code	= SI_KERNEL;		\20		} else {					\21			__entry->errno	= info->si_errno;	\22			__entry->code	= info->si_code;	\23		}						\24	} while (0)25 26#ifndef TRACE_HEADER_MULTI_READ27enum {28	TRACE_SIGNAL_DELIVERED,29	TRACE_SIGNAL_IGNORED,30	TRACE_SIGNAL_ALREADY_PENDING,31	TRACE_SIGNAL_OVERFLOW_FAIL,32	TRACE_SIGNAL_LOSE_INFO,33};34#endif35 36/**37 * signal_generate - called when a signal is generated38 * @sig: signal number39 * @info: pointer to struct siginfo40 * @task: pointer to struct task_struct41 * @group: shared or private42 * @result: TRACE_SIGNAL_*43 *44 * Current process sends a 'sig' signal to 'task' process with45 * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,46 * 'info' is not a pointer and you can't access its field. Instead,47 * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV48 * means that si_code is SI_KERNEL.49 */50TRACE_EVENT(signal_generate,51 52	TP_PROTO(int sig, struct kernel_siginfo *info, struct task_struct *task,53			int group, int result),54 55	TP_ARGS(sig, info, task, group, result),56 57	TP_STRUCT__entry(58		__field(	int,	sig			)59		__field(	int,	errno			)60		__field(	int,	code			)61		__array(	char,	comm,	TASK_COMM_LEN	)62		__field(	pid_t,	pid			)63		__field(	int,	group			)64		__field(	int,	result			)65	),66 67	TP_fast_assign(68		__entry->sig	= sig;69		TP_STORE_SIGINFO(__entry, info);70		memcpy(__entry->comm, task->comm, TASK_COMM_LEN);71		__entry->pid	= task->pid;72		__entry->group	= group;73		__entry->result	= result;74	),75 76	TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d",77		  __entry->sig, __entry->errno, __entry->code,78		  __entry->comm, __entry->pid, __entry->group,79		  __entry->result)80);81 82/**83 * signal_deliver - called when a signal is delivered84 * @sig: signal number85 * @info: pointer to struct siginfo86 * @ka: pointer to struct k_sigaction87 *88 * A 'sig' signal is delivered to current process with 'info' siginfo,89 * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or90 * SIG_DFL.91 * Note that some signals reported by signal_generate tracepoint can be92 * lost, ignored or modified (by debugger) before hitting this tracepoint.93 * This means, this can show which signals are actually delivered, but94 * matching generated signals and delivered signals may not be correct.95 */96TRACE_EVENT(signal_deliver,97 98	TP_PROTO(int sig, struct kernel_siginfo *info, struct k_sigaction *ka),99 100	TP_ARGS(sig, info, ka),101 102	TP_STRUCT__entry(103		__field(	int,		sig		)104		__field(	int,		errno		)105		__field(	int,		code		)106		__field(	unsigned long,	sa_handler	)107		__field(	unsigned long,	sa_flags	)108	),109 110	TP_fast_assign(111		__entry->sig	= sig;112		TP_STORE_SIGINFO(__entry, info);113		__entry->sa_handler	= (unsigned long)ka->sa.sa_handler;114		__entry->sa_flags	= ka->sa.sa_flags;115	),116 117	TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",118		  __entry->sig, __entry->errno, __entry->code,119		  __entry->sa_handler, __entry->sa_flags)120);121 122#endif /* _TRACE_SIGNAL_H */123 124/* This part must be outside protection */125#include <trace/define_trace.h>126