[Qemu-devel] [RFC PATCH 10/21] qom/cpu: add a cpu_exit trace event

["Alex Bennée" <alex.bennee@linaro.org>]

This is useful for tracing cpu_exit events where we signal the CPU to
come back to the main loop.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 qom/cpu.c        | 3 +++
 qom/trace-events | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/qom/cpu.c b/qom/cpu.c
index 92599f3541..5a77ff6acd 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -19,6 +19,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "trace.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "qom/cpu.h"
@@ -111,6 +112,8 @@ void cpu_reset_interrupt(CPUState *cpu, int mask)
 
 void cpu_exit(CPUState *cpu)
 {
+    trace_cpu_exit(cpu, cpu->cpu_index);
+
     atomic_set(&cpu->exit_request, 1);
     /* Ensure cpu_exec will see the exit request after TCG has exited.  */
     smp_wmb();
diff --git a/qom/trace-events b/qom/trace-events
index 5d86fbf019..1162dd86fe 100644
--- a/qom/trace-events
+++ b/qom/trace-events
@@ -1,5 +1,9 @@
 # See docs/devel/tracing.txt for syntax documentation.
 
+# qom/cpu.c
+# cpu_exit events
+cpu_exit(void *cpu, int id) "cpu:%p id:%d"
+
 # qom/object.c
 object_dynamic_cast_assert(const char *type, const char *target, const char *file, int line, const char *func) "%s->%s (%s:%d:%s)"
 object_class_dynamic_cast_assert(const char *type, const char *target, const char *file, int line, const char *func) "%s->%s (%s:%d:%s)"
-- 
2.17.1