[PATCH 24/49] perf tools: Add a test case for timed map groups handling

Jiri Olsa
2018-01-09T15:36:59Z

From: Namhyung Kim <namhyung@kernel.org>

A test case for verifying thread->mg and ->mg_list handling during
time change and new thread__find_addr_map_by_time() and friends.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-20jkz8hzs9njsvmrseo2o3s8@git.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/tests/Build | 1 +
tools/perf/tests/builtin-test.c | 4 ++
tools/perf/tests/tests.h | 1 +
tools/perf/tests/thread-mg-time.c | 94 +++++++++++++++++++++++++++++++++++++++
4 files changed, 100 insertions(+)
create mode 100644 tools/perf/tests/thread-mg-time.c

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 973ee29c4235..a65e671e3372 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -26,6 +26,7 @@ perf-y += mmap-thread-lookup.o
perf-y += thread-comm.o
perf-y += thread-mg-share.o
perf-y += thread-lookup-time.o
+perf-y += thread-mg-time.o
perf-y += switch-tracking.o
perf-y += keep-tracking.o
perf-y += code-reading.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 755f14661c7a..52c29269e247 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -279,6 +279,10 @@ static struct test generic_tests[] = {
.func = test__thread_lookup_time,
},
{
+ .desc = "Test thread map group handling with time",
+ .func = test__thread_mg_time,
+ },
+ {
.func = NULL,
},
};
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 65aacf9c342d..dfc127165914 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -104,6 +104,7 @@ int test__clang_subtest_get_nr(void);
int test__unit_number__scnprint(struct test *test, int subtest);
int test__thread_comm(struct test *test, int subtest);
int test__thread_lookup_time(struct test *test, int subtest);
+int test__thread_mg_time(struct test *test, int subtest);

bool test__bp_signal_is_supported(void);

diff --git a/tools/perf/tests/thread-mg-time.c b/tools/perf/tests/thread-mg-time.c
new file mode 100644
index 000000000000..6a735f59c097
--- /dev/null
+++ b/tools/perf/tests/thread-mg-time.c
@@ -0,0 +1,94 @@
+#include <linux/compiler.h>
+#include "tests.h"
+#include "machine.h"
+#include "thread.h"
+#include "map.h"
+#include "debug.h"
+
+#define PERF_MAP_START 0x40000
+
+int test__thread_mg_time(struct test *test __maybe_unused, int subtest __maybe_unused)
+{
+ struct machines machines;
+ struct machine *machine;
+ struct thread *t;
+ struct map_groups *mg;
+ struct map *map, *old_map;
+ struct addr_location al = { .map = NULL, };
+
+ /*
+ * This test is to check whether it can retrieve a correct map
+ * for a given time. When multi-file data storage is enabled,
+ * those task/comm/mmap events are processed first so the
+ * later sample should find a matching comm properly.
+ */
+ machines__init(&machines);
+ machine = &machines.host;
+
+ /* this is needed to add/find map by time */
+ perf_has_index = true;
+
+ t = machine__findnew_thread(machine, 0, 0);
+ mg = t->mg;
+
+ map = dso__new_map("/usr/bin/perf");
+ map->start = PERF_MAP_START;
+ map->end = PERF_MAP_START + 0x1000;
+
+ thread__insert_map(t, map);
+
+ if (verbose > 1)
+ map_groups__fprintf(t->mg, stderr);
+
+ thread__find_addr_map(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+ PERF_MAP_START, &al);
+
+ TEST_ASSERT_VAL("cannot find mapping for perf", al.map != NULL);
+ TEST_ASSERT_VAL("non matched mapping found", al.map == map);
+ TEST_ASSERT_VAL("incorrect map groups", al.map->groups == mg);
+ TEST_ASSERT_VAL("incorrect map groups", al.map->groups == t->mg);
+
+ thread__find_addr_map_by_time(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+ PERF_MAP_START, &al, -1ULL);
+
+ TEST_ASSERT_VAL("cannot find timed mapping for perf", al.map != NULL);
+ TEST_ASSERT_VAL("non matched timed mapping", al.map == map);
+ TEST_ASSERT_VAL("incorrect timed map groups", al.map->groups == mg);
+ TEST_ASSERT_VAL("incorrect map groups", al.map->groups == t->mg);
+
+
+ pr_debug("simulate EXEC event (generate new mg)\n");
+ __thread__set_comm(t, "perf-test", 10000, true);
+
+ old_map = map;
+
+ map = dso__new_map("/usr/bin/perf-test");
+ map->start = PERF_MAP_START;
+ map->end = PERF_MAP_START + 0x2000;
+
+ thread__insert_map(t, map);
+
+ if (verbose > 1)
+ map_groups__fprintf(t->mg, stderr);
+
+ thread__find_addr_map(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+ PERF_MAP_START + 4, &al);
+
+ TEST_ASSERT_VAL("cannot find mapping for perf-test", al.map != NULL);
+ TEST_ASSERT_VAL("invalid mapping found", al.map == map);
+ TEST_ASSERT_VAL("incorrect map groups", al.map->groups != mg);
+ TEST_ASSERT_VAL("incorrect map groups", al.map->groups == t->mg);
+
+ pr_debug("searching map in the old mag groups\n");
+ thread__find_addr_map_by_time(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+ PERF_MAP_START, &al, 5000);
+
+ TEST_ASSERT_VAL("cannot find timed mapping for perf-test", al.map != NULL);
+ TEST_ASSERT_VAL("non matched timed mapping", al.map == old_map);
+ TEST_ASSERT_VAL("incorrect timed map groups", al.map->groups == mg);
+ TEST_ASSERT_VAL("incorrect map groups", al.map->groups != t->mg);
+
+ machine__delete_threads(machine);
+ machines__exit(&machines);
+ return 0;
+}
--
2.13.6