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// 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 "test/util/save_util.h"
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
#include <atomic>
#include <cerrno>
#include "absl/types/optional.h"
namespace gvisor {
namespace testing {
namespace {
std::atomic<absl::optional<bool>> cooperative_save_present;
std::atomic<absl::optional<bool>> random_save_present;
bool CooperativeSavePresent() {
auto present = cooperative_save_present.load();
if (!present.has_value()) {
present = getenv("GVISOR_COOPERATIVE_SAVE_TEST") != nullptr;
cooperative_save_present.store(present);
}
return present.value();
}
bool RandomSavePresent() {
auto present = random_save_present.load();
if (!present.has_value()) {
present = getenv("GVISOR_RANDOM_SAVE_TEST") != nullptr;
random_save_present.store(present);
}
return present.value();
}
std::atomic<int> save_disable;
} // namespace
bool IsRunningWithSaveRestore() {
return CooperativeSavePresent() || RandomSavePresent();
}
void MaybeSave() {
if (CooperativeSavePresent() && save_disable.load() == 0) {
internal::DoCooperativeSave();
}
}
DisableSave::DisableSave() { save_disable++; }
DisableSave::~DisableSave() { reset(); }
void DisableSave::reset() {
if (!reset_) {
reset_ = true;
save_disable--;
}
}
} // namespace testing
} // namespace gvisor
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