Release 4.12 include/trace/events/signal.h

#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>
Overall Contributors
Person
Tokens
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Commits
CommitProp
Masami Hiramatsu
76
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2
50.00%
Oleg Nesterov
26
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2
50.00%
Total
102
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4
100.00%
Directory: include/trace/events

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