LXR linux/include/trace/events/signal.h

   1#undef TRACE_SYSTEM
   2#define TRACE_SYSTEM signal
   3
   4#if !defined(_TRACE_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
   5#define _TRACE_SIGNAL_H
   6
   7#include <linux/signal.h>
   8#include <linux/sched.h>
   9#include <linux/tracepoint.h>
  10
  11#define TP_STORE_SIGINFO(__entry, info)                         \
  12        do {                                                    \
  13                if (info == SEND_SIG_NOINFO ||                  \
  14                    info == SEND_SIG_FORCED) {                  \
  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_READ
  27enum {
  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#endif
  35
  36/**
  37 * signal_generate - called when a signal is generated
  38 * @sig: signal number
  39 * @info: pointer to struct siginfo
  40 * @task: pointer to struct task_struct
  41 * @group: shared or private
  42 * @result: TRACE_SIGNAL_*
  43 *
  44 * Current process sends a 'sig' signal to 'task' process with
  45 * '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_PRIV
  48 * means that si_code is SI_KERNEL.
  49 */
  50TRACE_EVENT(signal_generate,
  51
  52        TP_PROTO(int sig, struct 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 delivered
  84 * @sig: signal number
  85 * @info: pointer to struct siginfo
  86 * @ka: pointer to struct k_sigaction
  87 *
  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 or
  90 * SIG_DFL.
  91 * Note that some signals reported by signal_generate tracepoint can be
  92 * lost, ignored or modified (by debugger) before hitting this tracepoint.
  93 * This means, this can show which signals are actually delivered, but
  94 * matching generated signals and delivered signals may not be correct.
  95 */
  96TRACE_EVENT(signal_deliver,
  97
  98        TP_PROTO(int sig, struct 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