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-rw-r--r--kernel/include/trace/events/signal.h125
1 files changed, 125 insertions, 0 deletions
diff --git a/kernel/include/trace/events/signal.h b/kernel/include/trace/events/signal.h
new file mode 100644
index 000000000..39a8a430d
--- /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>