[PATCH v2 07/12] perf tests: Test evsel__set_config_if_unset() and config change tracking

[James Clark]

Test that evsel__set_config_if_unset() behaves as expected. This also
tests the user config change tracking mechanism as it depends on it.

Signed-off-by: James Clark <james.clark at linaro.org>
---
 tools/perf/tests/pmu.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
index cbded2c6faa4..f938135e62aa 100644
--- a/tools/perf/tests/pmu.c
+++ b/tools/perf/tests/pmu.c
@@ -192,9 +192,98 @@ static int test__pmu_format(struct test_suite *test __maybe_unused, int subtest
 	}
 	if (attr.config2 != 0x0400000020041d07) {
 		pr_err("Unexpected config2 value %llx\n", attr.config2);
+	}
+
+	ret = TEST_OK;
+err_out:
+	parse_events_terms__exit(&terms);
+	test_pmu_put(dir, pmu);
+	return ret;
+}
+
+static int test__pmu_usr_chgs(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
+{
+	const char *event = "perf-pmu-test/config=15,config1=4,krava02=170,"
+			    "krava03=1,krava11=27,krava12=1/";
+	struct parse_events_terms terms;
+	struct parse_events_error err;
+	LIST_HEAD(config_terms);
+	struct evlist *evlist;
+	struct perf_pmu *pmu;
+	struct evsel *evsel;
+	int ret = TEST_FAIL;
+	char dir[PATH_MAX];
+	u64 val;
+
+	pmu = test_pmu_get(dir, sizeof(dir));
+	if (!pmu)
+		return TEST_FAIL;
+
+	evlist = evlist__new();
+	if (evlist == NULL) {
+		pr_err("Failed allocation");
 		goto err_out;
 	}
 
+	parse_events_terms__init(&terms);
+	ret = parse_events(evlist, event, &err);
+	if (ret) {
+		pr_debug("failed to parse event '%s', err %d\n", event, ret);
+		parse_events_error__print(&err, event);
+		if (parse_events_error__contains(&err, "can't access trace events"))
+			ret = TEST_SKIP;
+		goto err_out;
+	}
+	evsel = evlist__first(evlist);
+
+	/*
+	 * Set via config=15, krava01 bits 0-1
+	 * Set via config1=4, krava11 bit 1
+	 * Set values: krava02=170, krava03=1, krava11=27, krava12=1
+	 *
+	 * Test that already set values aren't overwritten.
+	 */
+	evsel__set_config_if_unset(pmu, evsel, "krava01", 16);
+	evsel__get_config_val(pmu, evsel, "krava01", &val);
+	TEST_ASSERT_EQUAL("krava01 overwritten", (int) val, (15 & 0b11));
+
+	evsel__set_config_if_unset(pmu, evsel, "krava11", 45);
+	evsel__get_config_val(pmu, evsel, "krava11", &val);
+	TEST_ASSERT_EQUAL("krava11 overwritten", (int) val, (27 | (4 << 1)));
+
+	evsel__set_config_if_unset(pmu, evsel, "krava02", 32);
+	evsel__get_config_val(pmu, evsel, "krava02", &val);
+	TEST_ASSERT_EQUAL("krava02 overwritten", (int) val, 170);
+
+	evsel__set_config_if_unset(pmu, evsel, "krava03", 0);
+	evsel__get_config_val(pmu, evsel, "krava03", &val);
+	TEST_ASSERT_EQUAL("krava03 overwritten", (int) val, 1);
+
+	/*
+	 * krava13 doesn't have any bits set by either krava13= or config1=
+	 * but setting _any_ raw value for config1 implies that krava13
+	 * shouldn't be overwritten. So it's value should remain as 0.
+	 */
+	evsel__set_config_if_unset(pmu, evsel, "krava13", 5);
+	evsel__get_config_val(pmu, evsel, "krava13", &val);
+	TEST_ASSERT_EQUAL("krava13 overwritten", (int) val, 0);
+
+	/*
+	 * Unset values: krava21, krava22, krava23
+	 *
+	 * Test that unset values are overwritten.
+	 */
+	evsel__set_config_if_unset(pmu, evsel, "krava21", 13905);
+	evsel__get_config_val(pmu, evsel, "krava21", &val);
+	TEST_ASSERT_EQUAL("krava21 not overwritten", (int) val, 13905);
+
+	evsel__set_config_if_unset(pmu, evsel, "krava22", 11);
+	evsel__get_config_val(pmu, evsel, "krava22", &val);
+	TEST_ASSERT_EQUAL("krava22 not overwritten", (int) val, 11);
+
+	evsel__set_config_if_unset(pmu, evsel, "krava23", 0);
+	evsel__get_config_val(pmu, evsel, "krava23", &val);
+	TEST_ASSERT_EQUAL("krava23 not overwritten", (int) val, 0);
 	ret = TEST_OK;
 err_out:
 	parse_events_terms__exit(&terms);
@@ -539,6 +628,7 @@ static struct test_case tests__pmu[] = {
 	TEST_CASE("PMU name combining", name_len),
 	TEST_CASE("PMU name comparison", name_cmp),
 	TEST_CASE("PMU cmdline match", pmu_match),
+	TEST_CASE("PMU user config changes", pmu_usr_chgs),
 	{	.name = NULL, }
 };
 

-- 
2.34.1