perf tools: Add event_update event unit type

Adding unit type 'event update' event, that stores/transfer events unit
name. The unit name is part of the perf stat output data.

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/1445784728-21732-22-git-send-email-jolsa@kernel.org
[ Rename __alloc() to __new() for consistency ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 48 insertions, 0 deletions

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index fc0293150f93..614899b88b37 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -36,6 +36,7 @@ perf-y += bpf.o
 perf-y += topology.o
 perf-y += cpumap.o
 perf-y += stat.o
+perf-y += event_update.o
 
 $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
 	$(call rule_mkdir)
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 6a3519814492..f2b1dcac45d3 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -200,6 +200,10 @@ static struct test generic_tests[] = {
 		.func = test__synthesize_stat_round,
 	},
 	{
+		.desc = "Test attr update synthesize",
+		.func = test__event_update,
+	},
+	{
 		.func = NULL,
 	},
 };
diff --git a/tools/perf/tests/event_update.c b/tools/perf/tests/event_update.c
new file mode 100644
index 000000000000..9cdf4c934977
--- /dev/null
+++ b/tools/perf/tests/event_update.c
@@ -0,0 +1,42 @@
+#include <linux/compiler.h>
+#include "evlist.h"
+#include "evsel.h"
+#include "machine.h"
+#include "tests.h"
+#include "debug.h"
+
+static int process_event_unit(struct perf_tool *tool __maybe_unused,
+			      union perf_event *event,
+			      struct perf_sample *sample __maybe_unused,
+			      struct machine *machine __maybe_unused)
+{
+	struct event_update_event *ev = (struct event_update_event *) event;
+
+	TEST_ASSERT_VAL("wrong id", ev->id == 123);
+	TEST_ASSERT_VAL("wrong id", ev->type == PERF_EVENT_UPDATE__UNIT);
+	TEST_ASSERT_VAL("wrong unit", !strcmp(ev->data, "KRAVA"));
+	return 0;
+}
+
+int test__event_update(int subtest __maybe_unused)
+{
+	struct perf_evlist *evlist;
+	struct perf_evsel *evsel;
+
+	evlist = perf_evlist__new_default();
+	TEST_ASSERT_VAL("failed to get evlist", evlist);
+
+	evsel = perf_evlist__first(evlist);
+
+	TEST_ASSERT_VAL("failed to allos ids",
+			!perf_evsel__alloc_id(evsel, 1, 1));
+
+	perf_evlist__id_add(evlist, evsel, 0, 0, 123);
+
+	evsel->unit = strdup("KRAVA");
+
+	TEST_ASSERT_VAL("failed to synthesize attr update unit",
+			!perf_event__synthesize_event_update_unit(NULL, evsel, process_event_unit));
+
+	return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index a82ab9c4c0ca..82b2b5e6ba7c 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -84,6 +84,7 @@ 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);
+int test__event_update(int subtest);
 
 #if defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT