mirror of
https://github.com/google/sandboxed-api.git
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84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "sandboxed_api/transaction.h"
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#include <functional>
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#include <memory>
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#include "absl/log/log.h"
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#include "absl/status/status.h"
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#include "absl/time/time.h"
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#include "sandboxed_api/util/status_macros.h"
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namespace sapi {
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constexpr absl::Duration TransactionBase::kDefaultTimeLimit;
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absl::Status TransactionBase::RunTransactionFunctionInSandbox(
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const std::function<absl::Status()>& f) {
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// Run Main(), invoking Init() if this hasn't been yet done.
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SAPI_RETURN_IF_ERROR(sandbox_->Init());
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// Set the wall-time limit for this transaction run, and clean it up
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// afterwards, no matter what the result.
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SAPI_RETURN_IF_ERROR(
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sandbox_->SetWallTimeLimit(absl::Seconds(GetTimeLimit())));
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struct TimeCleanup {
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~TimeCleanup() {
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capture->sandbox_->SetWallTimeLimit(absl::ZeroDuration()).IgnoreError();
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}
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TransactionBase* capture;
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} sandbox_cleanup = {this};
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if (!initialized_) {
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SAPI_RETURN_IF_ERROR(Init());
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initialized_ = true;
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}
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return f();
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}
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absl::Status TransactionBase::RunTransactionLoop(
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const std::function<absl::Status()>& f) {
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// Try to run Main() for a few times, return error if none of the tries
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// succeeded.
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absl::Status status;
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for (int i = 0; i <= retry_count_; ++i) {
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status = RunTransactionFunctionInSandbox(f);
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if (status.ok()) {
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return status;
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}
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sandbox_->Terminate();
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initialized_ = false;
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}
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LOG(ERROR) << "Tried " << (retry_count_ + 1) << " times to run the "
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<< "transaction, but it failed. SAPI error: '" << status
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<< "'. Latest sandbox error: '"
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<< sandbox_->AwaitResult().ToString() << "'";
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return status;
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}
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TransactionBase::~TransactionBase() {
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if (!initialized_) {
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return;
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}
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if (absl::Status status = Finish(); !status.ok()) {
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LOG(ERROR) << "Transaction finalizer returned an error: " << status;
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}
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}
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} // namespace sapi
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