Open source system call tests.

PiperOrigin-RevId: 224886231
Change-Id: I0fccb4d994601739d8b16b1d4e6b31f40297fb22

1 files changed, 47 insertions, 0 deletions

diff --git a/test/util/save_util.h b/test/util/save_util.h
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+++ b/test/util/save_util.h
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+// Copyright 2018 Google LLC
+//
+// 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.
+
+#ifndef GVISOR_TEST_UTIL_SAVE_UTIL_H_
+#define GVISOR_TEST_UTIL_SAVE_UTIL_H_
+
+namespace gvisor {
+namespace testing {
+// Disable save prevents saving while the given function executes.
+//
+// This lasts the duration of the object, unless reset is called.
+class DisableSave {
+ public:
+  DisableSave();
+  ~DisableSave();
+  DisableSave(DisableSave const&) = delete;
+  DisableSave(DisableSave&&) = delete;
+  DisableSave& operator=(DisableSave const&) = delete;
+  DisableSave& operator=(DisableSave&&) = delete;
+
+  // reset allows saves to continue, and is called implicitly by the destructor.
+  // It may be called multiple times safely, but is not thread-safe.
+  void reset();
+
+ private:
+  bool reset_ = false;
+};
+
+// May perform a co-operative save cycle.
+//
+// errno is guaranteed to be preserved.
+void MaybeSave();
+}  // namespace testing
+}  // namespace gvisor
+
+#endif  // GVISOR_TEST_UTIL_SAVE_UTIL_H_