126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
|
/* 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) { \
|
||
|
|
__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 kernel_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 kernel_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>
|