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125 lines
3.4 KiB
125 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#undef TRACE_SYSTEM |
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#define TRACE_SYSTEM signal |
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#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ) |
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#define _TRACE_SIGNAL_H |
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#include <linux/signal.h> |
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#include <linux/sched.h> |
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#include <linux/tracepoint.h> |
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#define TP_STORE_SIGINFO(__entry, info) \ |
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do { \ |
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if (info == SEND_SIG_NOINFO) { \ |
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__entry->errno = 0; \ |
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__entry->code = SI_USER; \ |
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} else if (info == SEND_SIG_PRIV) { \ |
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__entry->errno = 0; \ |
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__entry->code = SI_KERNEL; \ |
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} else { \ |
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__entry->errno = info->si_errno; \ |
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__entry->code = info->si_code; \ |
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} \ |
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} while (0) |
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#ifndef TRACE_HEADER_MULTI_READ |
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enum { |
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TRACE_SIGNAL_DELIVERED, |
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TRACE_SIGNAL_IGNORED, |
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TRACE_SIGNAL_ALREADY_PENDING, |
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TRACE_SIGNAL_OVERFLOW_FAIL, |
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TRACE_SIGNAL_LOSE_INFO, |
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}; |
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#endif |
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/** |
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* signal_generate - called when a signal is generated |
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* @sig: signal number |
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* @info: pointer to struct siginfo |
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* @task: pointer to struct task_struct |
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* @group: shared or private |
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* @result: TRACE_SIGNAL_* |
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* |
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* Current process sends a 'sig' signal to 'task' process with |
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* 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV, |
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* 'info' is not a pointer and you can't access its field. Instead, |
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* SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV |
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* means that si_code is SI_KERNEL. |
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*/ |
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TRACE_EVENT(signal_generate, |
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TP_PROTO(int sig, struct kernel_siginfo *info, struct task_struct *task, |
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int group, int result), |
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TP_ARGS(sig, info, task, group, result), |
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TP_STRUCT__entry( |
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__field( int, sig ) |
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__field( int, errno ) |
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__field( int, code ) |
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__array( char, comm, TASK_COMM_LEN ) |
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__field( pid_t, pid ) |
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__field( int, group ) |
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__field( int, result ) |
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), |
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TP_fast_assign( |
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__entry->sig = sig; |
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TP_STORE_SIGINFO(__entry, info); |
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memcpy(__entry->comm, task->comm, TASK_COMM_LEN); |
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__entry->pid = task->pid; |
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__entry->group = group; |
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__entry->result = result; |
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), |
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TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d grp=%d res=%d", |
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__entry->sig, __entry->errno, __entry->code, |
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__entry->comm, __entry->pid, __entry->group, |
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__entry->result) |
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); |
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/** |
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* signal_deliver - called when a signal is delivered |
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* @sig: signal number |
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* @info: pointer to struct siginfo |
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* @ka: pointer to struct k_sigaction |
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* |
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* A 'sig' signal is delivered to current process with 'info' siginfo, |
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* and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or |
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* SIG_DFL. |
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* Note that some signals reported by signal_generate tracepoint can be |
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* lost, ignored or modified (by debugger) before hitting this tracepoint. |
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* This means, this can show which signals are actually delivered, but |
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* matching generated signals and delivered signals may not be correct. |
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*/ |
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TRACE_EVENT(signal_deliver, |
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TP_PROTO(int sig, struct kernel_siginfo *info, struct k_sigaction *ka), |
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TP_ARGS(sig, info, ka), |
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TP_STRUCT__entry( |
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__field( int, sig ) |
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__field( int, errno ) |
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__field( int, code ) |
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__field( unsigned long, sa_handler ) |
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__field( unsigned long, sa_flags ) |
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), |
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TP_fast_assign( |
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__entry->sig = sig; |
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TP_STORE_SIGINFO(__entry, info); |
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__entry->sa_handler = (unsigned long)ka->sa.sa_handler; |
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__entry->sa_flags = ka->sa.sa_flags; |
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), |
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TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx", |
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__entry->sig, __entry->errno, __entry->code, |
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__entry->sa_handler, __entry->sa_flags) |
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); |
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#endif /* _TRACE_SIGNAL_H */ |
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/* This part must be outside protection */ |
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#include <trace/define_trace.h>
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