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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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.
package com.google.devtools.build.lib.util;
import com.google.common.base.Throwables;
import java.util.logging.Logger;
import javax.annotation.Nullable;
/** Utilities for interacting with the jvm. */
public class RuntimeUtils {
private static final Logger LOG = Logger.getLogger(RuntimeUtils.class.getName());
@Nullable private static volatile Throwable unprocessedThrowableInTest = null;
private RuntimeUtils() {}
/**
* In tests, System.exit may be disabled. Thus, the main thread should call this method whenever
* it is about to block on thread completion that might hang because of a failed halt below.
*/
public static void maybePropagateUnprocessedThrowableIfInTest() {
Throwables.propagateIfPossible(unprocessedThrowableInTest);
}
/** Terminates the jvm with the exit code {@link ExitCode#BLAZE_INTERNAL_ERROR}. */
public static void halt(Throwable crash) {
LOG.info("About to call System#exit. Halt requested due to crash. See stderr for details.");
System.err.println("About to call System#exit. Halt requested due to crash");
crash.printStackTrace();
System.err.println("... called from");
new Exception().printStackTrace();
unprocessedThrowableInTest = crash;
System.exit(ExitCode.BLAZE_INTERNAL_ERROR.getNumericExitCode());
}
}
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