1 files changed, 60 insertions, 0 deletions
diff --git a/memory/jemalloc/src/test/unit/mtx.c b/memory/jemalloc/src/test/unit/mtx.c
new file mode 100644
index 000000000..96ff69486
--- /dev/null
+++ b/memory/jemalloc/src/test/unit/mtx.c
@@ -0,0 +1,60 @@
+#include "test/jemalloc_test.h"
+
+#define	NTHREADS	2
+#define	NINCRS		2000000
+
+TEST_BEGIN(test_mtx_basic)
+{
+	mtx_t mtx;
+
+	assert_false(mtx_init(&mtx), "Unexpected mtx_init() failure");
+	mtx_lock(&mtx);
+	mtx_unlock(&mtx);
+	mtx_fini(&mtx);
+}
+TEST_END
+
+typedef struct {
+	mtx_t		mtx;
+	unsigned	x;
+} thd_start_arg_t;
+
+static void *
+thd_start(void *varg)
+{
+	thd_start_arg_t *arg = (thd_start_arg_t *)varg;
+	unsigned i;
+
+	for (i = 0; i < NINCRS; i++) {
+		mtx_lock(&arg->mtx);
+		arg->x++;
+		mtx_unlock(&arg->mtx);
+	}
+	return (NULL);
+}
+
+TEST_BEGIN(test_mtx_race)
+{
+	thd_start_arg_t arg;
+	thd_t thds[NTHREADS];
+	unsigned i;
+
+	assert_false(mtx_init(&arg.mtx), "Unexpected mtx_init() failure");
+	arg.x = 0;
+	for (i = 0; i < NTHREADS; i++)
+		thd_create(&thds[i], thd_start, (void *)&arg);
+	for (i = 0; i < NTHREADS; i++)
+		thd_join(thds[i], NULL);
+	assert_u_eq(arg.x, NTHREADS * NINCRS,
+	    "Race-related counter corruption");
+}
+TEST_END
+
+int
+main(void)
+{
+
+	return (test(
+	    test_mtx_basic,
+	    test_mtx_race));
+}