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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.packages;
import static com.google.common.truth.Truth.assertThat;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.RepositoryName;
import com.google.devtools.build.lib.events.util.EventCollectionApparatus;
import com.google.devtools.build.lib.packages.util.PackageFactoryApparatus;
import com.google.devtools.build.lib.testutil.Scratch;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.concurrent.SynchronousQueue;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Checks against a class initialization deadlock. "query sometimes hangs".
*
* <p>This requires static initialization of PackageGroup and PackageSpecification
* to occur in a multithreaded context, and therefore must be in its own class.
*/
@RunWith(JUnit4.class)
public class PackageGroupStaticInitializationTest {
private Scratch scratch = new Scratch("/workspace");
private EventCollectionApparatus events = new EventCollectionApparatus();
private PackageFactoryApparatus packages = new PackageFactoryApparatus(events.reporter());
@Test
public void testNoDeadlockOnPackageGroupCreation() throws Exception {
scratch.file("fruits/BUILD", "package_group(name = 'mango', packages = ['//...'])");
final SynchronousQueue<PackageSpecification> groupQueue = new SynchronousQueue<>();
Thread producingThread =
new Thread(
new Runnable() {
@Override
public void run() {
try {
RepositoryName defaultRepoName =
Label.parseAbsoluteUnchecked("//context")
.getPackageIdentifier()
.getRepository();
groupQueue.put(PackageSpecification.fromString(defaultRepoName, "//fruits/..."));
} catch (Exception e) {
// Can't throw from Runnable, but this will cause the test to timeout
// when the consumer can't take the object.
e.printStackTrace();
}
}
});
Thread consumingThread =
new Thread(
new Runnable() {
@Override
public void run() {
try {
getPackageGroup("fruits", "mango");
groupQueue.take();
} catch (Exception e) {
// Can't throw from Runnable, but this will cause the test to timeout
// when the producer can't put the object.
e.printStackTrace();
}
}
});
consumingThread.start();
producingThread.start();
producingThread.join(3000);
consumingThread.join(3000);
assertThat(producingThread.isAlive()).isFalse();
assertThat(consumingThread.isAlive()).isFalse();
}
private Package getPackage(String packageName) throws Exception {
PathFragment buildFileFragment = PathFragment.create(packageName).getRelative("BUILD");
Path buildFile = scratch.resolve(buildFileFragment.getPathString());
return packages.createPackage(packageName, buildFile);
}
private PackageGroup getPackageGroup(String pkg, String name) throws Exception {
return (PackageGroup) getPackage(pkg).getTarget(name);
}
}
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