Testing that perf properly closes opened dso objects
and tries to reopen in case we run out of allowed file
descriptors for dso data.
Cc: Arnaldo Carvalho de Melo <a...@kernel.org>
Cc: Corey Ashford <cjash...@linux.vnet.ibm.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Jean Pihet <jean.pi...@linaro.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
tools/perf/tests/builtin-test.c | 4 +++
tools/perf/tests/dso-data.c | 70 +++++++++++++++++++++++++++++++++++++++++
tools/perf/tests/tests.h | 1 +
3 files changed, 75 insertions(+)
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index c4d581a..a489cda 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -60,6 +60,10 @@ static struct test {
.func = test__dso_data_cache,
},
{
+ .desc = "Test dso data reopen",
+ .func = test__dso_data_reopen,
+ },
+ {
.desc = "roundtrip evsel->name check",
.func = test__perf_evsel__roundtrip_name_test,
},
diff --git a/tools/perf/tests/dso-data.c b/tools/perf/tests/dso-data.c
index 84ab939..ecc8acd 100644
--- a/tools/perf/tests/dso-data.c
+++ b/tools/perf/tests/dso-data.c
@@ -328,3 +328,73 @@ int test__dso_data_cache(void)
TEST_ASSERT_VAL("failed leadking files", nr == open_files_cnt());
return 0;
}
+
+int test__dso_data_reopen(void)
+{
+ struct machine machine;
+ long nr = open_files_cnt();
+#define BUFSIZE 10
+ int fd, fd_extra;
+
+ memset(&machine, 0, sizeof(machine));
+
+ /*
+ * Test scenario:
+ * - create 3 dso objects
+ * - set process file descriptor limit to current
+ * files count + 3
+ * - test that the first dso gets closed when we
+ * reach the files count limit
+ */
+
+ /* Make sure we are able to open 3 fds anyway */
+ TEST_ASSERT_VAL("failed to set file limit",
+ !set_fd_limit((nr + 3)));
+
+ TEST_ASSERT_VAL("failed to create dsos\n",
!dsos__create(TEST_FILE_SIZE));
+
+ /* open dso_0 */
+ fd = dso__data_fd(dso_0, &machine);
+ TEST_ASSERT_VAL("failed to get fd", fd > 0);
+
+ /* open dso_1 */
+ fd = dso__data_fd(dso_1, &machine);
+ TEST_ASSERT_VAL("failed to get fd", fd > 0);
+
+ /*
+ * open extra file descriptor and we just
+ * reached the files count limit
+ */
+ fd_extra = open("/dev/null", O_RDONLY);
+ TEST_ASSERT_VAL("failed to open extra fd", fd_extra > 0);
+
+ /* open dso_2 */
+ fd = dso__data_fd(dso_2, &machine);
+ TEST_ASSERT_VAL("failed to get fd", fd > 0);
+
+ /*
+ * dso_0 should get closed, because we reached
+ * the file descriptor limit
+ */
+ TEST_ASSERT_VAL("failed to close dso_0", dso_0->data.fd == -1);
+
+ /* open dso_0 */
+ fd = dso__data_fd(dso_0, &machine);
+ TEST_ASSERT_VAL("failed to get fd", fd > 0);
+
+ /*
+ * dso_1 should get closed, because we reached
+ * the file descriptor limit
+ */
+ TEST_ASSERT_VAL("failed to close dso_0", dso_1->data.fd == -1);
+
+ /* cleanup everything */
+ close(fd_extra);
+ dsos__delete();
+
+ pr_debug("nr start %ld, nr stop %ld\n", nr, open_files_cnt());
+
+ /* Make sure we did not leak any file descriptor. */
+ TEST_ASSERT_VAL("failed leadking files", nr == open_files_cnt());
+ return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 61e12b6..3247ca1 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -29,6 +29,7 @@ int test__pmu(void);
int test__attr(void);
int test__dso_data(void);
int test__dso_data_cache(void);
+int test__dso_data_reopen(void);
int test__parse_events(void);
int test__hists_link(void);
int test__python_use(void);
--
1.8.3.1
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