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8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives

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Reviewed-by: kvn, coleenp, dholmes
This commit is contained in:
Vladimir Ivanov 2013-08-26 17:41:05 +04:00
parent 90f8734631
commit 4b7e40084c
2 changed files with 204 additions and 0 deletions
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194
hotspot/test/compiler/jsr292/ConcurrentClassLoadingTest.java Normal file
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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8022595
* @summary JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
*
* @run main/othervm ConcurrentClassLoadingTest
*/
import java.util.*;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
public class ConcurrentClassLoadingTest {
int numThreads = 0;
long seed = 0;
CyclicBarrier l;
Random rand;
public static void main(String[] args) throws Throwable {
ConcurrentClassLoadingTest test = new ConcurrentClassLoadingTest();
test.parseArgs(args);
test.run();
}
void parseArgs(String[] args) {
int i = 0;
while (i < args.length) {
String flag = args[i];
switch(flag) {
case "-seed":
seed = Long.parseLong(args[++i]);
break;
case "-numThreads":
numThreads = Integer.parseInt(args[++i]);
break;
default:
throw new Error("Unknown flag: " + flag);
}
++i;
}
}
void init() {
if (numThreads == 0) {
numThreads = Runtime.getRuntime().availableProcessors();
}
if (seed == 0) {
seed = (new Random()).nextLong();
}
rand = new Random(seed);
l = new CyclicBarrier(numThreads + 1);
System.out.printf("Threads: %d\n", numThreads);
System.out.printf("Seed: %d\n", seed);
}
final List<Loader> loaders = new ArrayList<>();
void prepare() {
List<String> c = new ArrayList<>(Arrays.asList(classNames));
// Split classes between loading threads
int count = (classNames.length / numThreads) + 1;
for (int t = 0; t < numThreads; t++) {
List<String> sel = new ArrayList<>();
System.out.printf("Thread #%d:\n", t);
for (int i = 0; i < count; i++) {
if (c.size() == 0) break;
int k = rand.nextInt(c.size());
String elem = c.remove(k);
sel.add(elem);
System.out.printf("\t%s\n", elem);
}
loaders.add(new Loader(sel));
}
// Print diagnostic info when the test hangs
Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {
boolean alive = false;
for (Loader l : loaders) {
if (!l.isAlive()) continue;
if (!alive) {
System.out.println("Some threads are still alive:");
alive = true;
}
System.out.println(l.getName());
for (StackTraceElement elem : l.getStackTrace()) {
System.out.println("\t"+elem.toString());
}
}
}
});
}
public void run() throws Throwable {
init();
prepare();
for (Loader loader : loaders) {
loader.start();
}
l.await();
for (Loader loader : loaders) {
loader.join();
}
}
class Loader extends Thread {
List<String> classes;
public Loader(List<String> classes) {
this.classes = classes;
setDaemon(true);
}
@Override
public void run() {
try {
l.await();
for (String name : classes) {
Class.forName(name).getName();
}
} catch (ClassNotFoundException | BrokenBarrierException | InterruptedException e) {
throw new Error(e);
}
}
}
final static String[] classNames = {
"java.lang.invoke.AbstractValidatingLambdaMetafactory",
"java.lang.invoke.BoundMethodHandle",
"java.lang.invoke.CallSite",
"java.lang.invoke.ConstantCallSite",
"java.lang.invoke.DirectMethodHandle",
"java.lang.invoke.InnerClassLambdaMetafactory",
"java.lang.invoke.InvokeDynamic",
"java.lang.invoke.InvokeGeneric",
"java.lang.invoke.InvokerBytecodeGenerator",
"java.lang.invoke.Invokers",
"java.lang.invoke.LambdaConversionException",
"java.lang.invoke.LambdaForm",
"java.lang.invoke.LambdaMetafactory",
"java.lang.invoke.MagicLambdaImpl",
"java.lang.invoke.MemberName",
"java.lang.invoke.MethodHandle",
"java.lang.invoke.MethodHandleImpl",
"java.lang.invoke.MethodHandleInfo",
"java.lang.invoke.MethodHandleNatives",
"java.lang.invoke.MethodHandleProxies",
"java.lang.invoke.MethodHandles",
"java.lang.invoke.MethodHandleStatics",
"java.lang.invoke.MethodType",
"java.lang.invoke.MethodTypeForm",
"java.lang.invoke.MutableCallSite",
"java.lang.invoke.SerializedLambda",
"java.lang.invoke.SimpleMethodHandle",
"java.lang.invoke.SwitchPoint",
"java.lang.invoke.TypeConvertingMethodAdapter",
"java.lang.invoke.VolatileCallSite",
"java.lang.invoke.WrongMethodTypeException"
};
}