signal.h

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#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

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)
);

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>