Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / trace / events / signal.h

diff --git a/kernel/include/trace/events/signal.h b/kernel/include/trace/events/signal.h
new file mode 100644 (file)
index 0000000..39a8a43
--- /dev/null
+++ b/kernel/include/trace/events/signal.h
@@ -0,0 +1,125 @@
+#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>