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   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                         __entry->errno  = 0;                    \
  15                         __entry->code   = SI_USER;              \
  16                 } else if (info == SEND_SIG_PRIV) {             \
  17                         __entry->errno  = 0;                    \
  18                         __entry->code   = SI_KERNEL;            \
  19                 } else {                                        \
  20                         __entry->errno  = info->si_errno;       \
  21                         __entry->code   = info->si_code;        \
  22                 }                                               \
  23         } while (0)
  24
  25 /**
  26  * signal_generate - called when a signal is generated
  27  * @sig: signal number
  28  * @info: pointer to struct siginfo
  29  * @task: pointer to struct task_struct
  30  *
  31  * Current process sends a 'sig' signal to 'task' process with
  32  * 'info' siginfo. If 'info' is SEND_SIG_NOINFO or SEND_SIG_PRIV,
  33  * 'info' is not a pointer and you can't access its field. Instead,
  34  * SEND_SIG_NOINFO means that si_code is SI_USER, and SEND_SIG_PRIV
  35  * means that si_code is SI_KERNEL.
  36  */
  37 TRACE_EVENT(signal_generate,
  38
  39         TP_PROTO(int sig, struct siginfo *info, struct task_struct *task),
  40
  41         TP_ARGS(sig, info, task),
  42
  43         TP_STRUCT__entry(
  44                 __field(        int,    sig                     )
  45                 __field(        int,    errno                   )
  46                 __field(        int,    code                    )
  47                 __array(        char,   comm,   TASK_COMM_LEN   )
  48                 __field(        pid_t,  pid                     )
  49         ),
  50
  51         TP_fast_assign(
  52                 __entry->sig    = sig;
  53                 TP_STORE_SIGINFO(__entry, info);
  54                 memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
  55                 __entry->pid    = task->pid;
  56         ),
  57
  58         TP_printk("sig=%d errno=%d code=%d comm=%s pid=%d",
  59                   __entry->sig, __entry->errno, __entry->code,
  60                   __entry->comm, __entry->pid)
  61 );
  62
  63 /**
  64  * signal_deliver - called when a signal is delivered
  65  * @sig: signal number
  66  * @info: pointer to struct siginfo
  67  * @ka: pointer to struct k_sigaction
  68  *
  69  * A 'sig' signal is delivered to current process with 'info' siginfo,
  70  * and it will be handled by 'ka'. ka->sa.sa_handler can be SIG_IGN or
  71  * SIG_DFL.
  72  * Note that some signals reported by signal_generate tracepoint can be
  73  * lost, ignored or modified (by debugger) before hitting this tracepoint.
  74  * This means, this can show which signals are actually delivered, but
  75  * matching generated signals and delivered signals may not be correct.
  76  */
  77 TRACE_EVENT(signal_deliver,
  78
  79         TP_PROTO(int sig, struct siginfo *info, struct k_sigaction *ka),
  80
  81         TP_ARGS(sig, info, ka),
  82
  83         TP_STRUCT__entry(
  84                 __field(        int,            sig             )
  85                 __field(        int,            errno           )
  86                 __field(        int,            code            )
  87                 __field(        unsigned long,  sa_handler      )
  88                 __field(        unsigned long,  sa_flags        )
  89         ),
  90
  91         TP_fast_assign(
  92                 __entry->sig    = sig;
  93                 TP_STORE_SIGINFO(__entry, info);
  94                 __entry->sa_handler     = (unsigned long)ka->sa.sa_handler;
  95                 __entry->sa_flags       = ka->sa.sa_flags;
  96         ),
  97
  98         TP_printk("sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx",
  99                   __entry->sig, __entry->errno, __entry->code,
 100                   __entry->sa_handler, __entry->sa_flags)
 101 );
 102 #endif /* _TRACE_SIGNAL_H */
 103
 104 /* This part must be outside protection */
 105 #include <trace/define_trace.h>