perf tools: Add stat round event synthesize function

Introduce the perf_event__synthesize_stat_round function to
synthesize a 'struct stat_round_event'.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-19-git-send-email-jolsa@kernel.org
[ Renamed 'time' parameter to 'evtime' to fix build on older systems ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/builtin-test.c

@@ -195,6 +195,10 @@ static struct test generic_tests[] = {
 		.desc = "Test stat synthesize",
 		.func = test__synthesize_stat,
 	},
+	{
+		.desc = "Test stat round synthesize",
+		.func = test__synthesize_stat_round,
+	},
 	{
 		.func = NULL,
 	},

tools/perf/tests/stat.c

@@ -88,3 +88,24 @@ int test__synthesize_stat(int subtest __maybe_unused)
 
 	return 0;
 }
+
+static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
+				    union perf_event *event,
+				    struct perf_sample *sample __maybe_unused,
+				    struct machine *machine __maybe_unused)
+{
+	struct stat_round_event *stat_round = &event->stat_round;
+
+	TEST_ASSERT_VAL("wrong time", stat_round->time == 0xdeadbeef);
+	TEST_ASSERT_VAL("wrong type", stat_round->type == PERF_STAT_ROUND_TYPE__INTERVAL);
+	return 0;
+}
+
+int test__synthesize_stat_round(int subtest __maybe_unused)
+{
+	TEST_ASSERT_VAL("failed to synthesize stat_config",
+		!perf_event__synthesize_stat_round(NULL, 0xdeadbeef, PERF_STAT_ROUND_TYPE__INTERVAL,
+						   process_stat_round_event, NULL));
+
+	return 0;
+}

tools/perf/tests/tests.h

@@ -83,6 +83,7 @@ int test__thread_map_synthesize(int subtest);
 int test__cpu_map_synthesize(int subtest);
 int test__synthesize_stat_config(int subtest);
 int test__synthesize_stat(int subtest);
+int test__synthesize_stat_round(int subtest);
 
 #if defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT

tools/perf/util/event.c

@@ -933,6 +933,23 @@ int perf_event__synthesize_stat(struct perf_tool *tool,
 	return process(tool, (union perf_event *) &event, NULL, machine);
 }
 
+int perf_event__synthesize_stat_round(struct perf_tool *tool,
+				      u64 evtime, u64 type,
+				      perf_event__handler_t process,
+				      struct machine *machine)
+{
+	struct stat_round_event event;
+
+	event.header.type = PERF_RECORD_STAT_ROUND;
+	event.header.size = sizeof(event);
+	event.header.misc = 0;
+
+	event.time = evtime;
+	event.type = type;
+
+	return process(tool, (union perf_event *) &event, NULL, machine);
+}
+
 void perf_event__read_stat_config(struct perf_stat_config *config,
 				  struct stat_config_event *event)
 {

tools/perf/util/event.h

@@ -517,6 +517,10 @@ int perf_event__synthesize_stat(struct perf_tool *tool,
 				struct perf_counts_values *count,
 				perf_event__handler_t process,
 				struct machine *machine);
+int perf_event__synthesize_stat_round(struct perf_tool *tool,
+				      u64 time, u64 type,
+				      perf_event__handler_t process,
+				      struct machine *machine);
 int perf_event__synthesize_modules(struct perf_tool *tool,
 				   perf_event__handler_t process,
 				   struct machine *machine);