tests: Add new test to check mutex lock contention

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

2 files changed, 74 insertions, 1 deletions

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 836a5e2..0887a01 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -37,7 +37,8 @@ set(SWRAP_TESTS
     test_swrap_unit
     test_max_sockets
     test_close_failure
-    test_fork_thread_deadlock)
+    test_fork_thread_deadlock
+    test_thread_sockets)
 
 if (HAVE_STRUCT_MSGHDR_MSG_CONTROL)
     set(SWRAP_TESTS ${SWRAP_TESTS} test_sendmsg_recvmsg_fd)
diff --git a/tests/test_thread_sockets.c b/tests/test_thread_sockets.c
new file mode 100644
index 0000000..364a001
--- /dev/null
+++ b/tests/test_thread_sockets.c
@@ -0,0 +1,72 @@
+#include "config.h"
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+#include <pthread.h>
+
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <grp.h>
+
+#define NUM_THREADS 10
+
+static void *thread_worker(void *arg)
+{
+	int i;
+
+	(void) arg; /* unused */
+
+	for (i = 0; i < 1000; i++) {
+		int s;
+
+		s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+		assert_return_code(s, errno);
+
+		close(s);
+	}
+
+	return NULL;
+}
+
+static void test_threads_socket(void **state)
+{
+	pthread_attr_t pthread_custom_attr;
+	pthread_t threads[NUM_THREADS];
+	int i;
+
+	(void) state; /* unused */
+
+	pthread_attr_init(&pthread_custom_attr);
+
+	for (i = 0; i < NUM_THREADS; i++) {
+		pthread_create(&threads[i],
+			       &pthread_custom_attr,
+			       thread_worker,
+			       NULL);
+	}
+
+	for (i = 0; i < NUM_THREADS; i++) {
+		pthread_join(threads[i], NULL);
+	}
+
+	pthread_attr_destroy(&pthread_custom_attr);
+}
+
+int main(void) {
+	int rc;
+
+	const struct CMUnitTest thread_tests[] = {
+		cmocka_unit_test(test_threads_socket),
+	};
+
+	rc = cmocka_run_group_tests(thread_tests, NULL, NULL);
+
+	return rc;
+}