1 files changed, 31 insertions, 0 deletions
diff --git a/test/syscalls/linux/brk.cc b/test/syscalls/linux/brk.cc
new file mode 100644
index 000000000..a03a44465
--- /dev/null
+++ b/test/syscalls/linux/brk.cc
@@ -0,0 +1,31 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdint.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+TEST(BrkTest, BrkSyscallReturnsOldBrkOnFailure) {
+  auto old_brk = sbrk(0);
+  EXPECT_THAT(syscall(SYS_brk, reinterpret_cast<void*>(-1)),
+              SyscallSucceedsWithValue(reinterpret_cast<uintptr_t>(old_brk)));
+}
+
+}  // namespace testing
+}  // namespace gvisor