提交 3718cd57 编写于 作者: C ctornqvi

8009577: Test test/closed/runtime/classunload broken

Summary: Fixed tests to use new way of utilizing the WB API, fixed issue with where custom classloader got the classes from
Reviewed-by: collins, mgerdin, zgu
上级 ef0a0f52
/*
* 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 KeepAliveClass
* @summary This test case uses a java.lang.Class instance to keep a class alive.
* @library /testlibrary /testlibrary/whitebox /runtime/testlibrary
* @library classes
* @build KeepAliveClass test.Empty
* @build ClassUnloadCommon
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveClass
*/
import java.lang.ref.SoftReference;
import sun.hotspot.WhiteBox;
/**
* Test that verifies that classes are not unloaded when specific types of references are kept to them.
*/
public class KeepAliveClass {
private static final String className = "test.Empty";
private static final WhiteBox wb = WhiteBox.getWhiteBox();
public static Object escape = null;
public static void main(String... args) throws Exception {
ClassLoader cl = ClassUnloadCommon.newClassLoader();
Class<?> c = cl.loadClass(className);
Object o = c.newInstance();
o = null; cl = null;
escape = c;
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testClass (1) alive: " + isAlive);
ClassUnloadCommon.failIf(!isAlive, "should be alive");
}
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testClass (2) alive: " + isAlive);
ClassUnloadCommon.failIf(!isAlive, "should be alive");
}
c = null;
escape = null;
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testClass (3) alive: " + isAlive);
ClassUnloadCommon.failIf(isAlive, "should be unloaded");
}
}
}
/*
* 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 KeepAliveClassLoader
* @summary This test case uses a java.lang.ClassLoader instance to keep a class alive.
* @library /testlibrary /testlibrary/whitebox /runtime/testlibrary
* @library classes
* @build KeepAliveClassLoader test.Empty
* @build ClassUnloadCommon
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveClassLoader
*/
import sun.hotspot.WhiteBox;
/**
* Test that verifies that classes are not unloaded when specific types of references are kept to them.
*/
public class KeepAliveClassLoader {
private static final String className = "test.Empty";
private static final WhiteBox wb = WhiteBox.getWhiteBox();
public static Object escape = null;
public static void main(String... args) throws Exception {
ClassLoader cl = ClassUnloadCommon.newClassLoader();
Class<?> c = cl.loadClass(className);
Object o = c.newInstance();
o = null; c = null;
escape = cl;
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testClassLoader (1) alive: " + isAlive);
ClassUnloadCommon.failIf(!isAlive, "should be alive");
}
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testClassLoader (2) alive: " + isAlive);
ClassUnloadCommon.failIf(!isAlive, "should be alive");
}
cl = null;
escape = null;
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testClassLoader (3) alive: " + isAlive);
ClassUnloadCommon.failIf(isAlive, "should be unloaded");
}
}
}
/*
* 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 KeepAliveObject
* @summary This test case uses a class instance to keep the class alive.
* @library /testlibrary /testlibrary/whitebox /runtime/testlibrary
* @library classes
* @build KeepAliveObject test.Empty
* @build ClassUnloadCommon
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveObject
*/
import sun.hotspot.WhiteBox;
/**
* Test that verifies that classes are not unloaded when specific types of references are kept to them.
*/
public class KeepAliveObject {
private static final String className = "test.Empty";
private static final WhiteBox wb = WhiteBox.getWhiteBox();
public static Object escape = null;
public static void main(String... args) throws Exception {
ClassLoader cl = ClassUnloadCommon.newClassLoader();
Class<?> c = cl.loadClass(className);
Object o = c.newInstance();
cl = null; c = null;
escape = o;
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testObject (1) alive: " + isAlive);
ClassUnloadCommon.failIf(!isAlive, "should be alive");
}
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testObject (2) alive: " + isAlive);
ClassUnloadCommon.failIf(!isAlive, "should be alive");
}
o = null;
escape = null;
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testObject (3) alive: " + isAlive);
ClassUnloadCommon.failIf(isAlive, "should be unloaded");
}
}
}
/*
* 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 KeepAliveSoftReference
* @summary This test case uses a java.lang.ref.SoftReference referencing a class instance to keep a class alive.
* @library /testlibrary /testlibrary/whitebox /runtime/testlibrary
* @library classes
* @build KeepAliveSoftReference test.Empty
* @build ClassUnloadCommon
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveSoftReference
*/
import java.lang.ref.SoftReference;
import sun.hotspot.WhiteBox;
/**
* Test that verifies that classes are not unloaded when specific types of references are kept to them.
*/
public class KeepAliveSoftReference {
private static final String className = "test.Empty";
private static final WhiteBox wb = WhiteBox.getWhiteBox();
public static void main(String... args) throws Exception {
ClassLoader cl = ClassUnloadCommon.newClassLoader();
Class<?> c = cl.loadClass(className);
Object o = c.newInstance();
SoftReference<Object> sr = new SoftReference(o);
o = null; c = null; cl = null;
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testSoftReference (1) alive: " + isAlive);
boolean cleared = (sr.get() == null);
boolean shouldBeAlive = !cleared;
ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);
}
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testSoftReference (2) alive: " + isAlive);
boolean cleared = (sr.get() == null);
boolean shouldBeAlive = !cleared;
ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);
}
sr.clear();
ClassUnloadCommon.triggerUnloading();
{
boolean isAlive = wb.isClassAlive(className);
System.out.println("testSoftReference (3) alive: " + isAlive);
boolean cleared = (sr.get() == null);
boolean shouldBeAlive = !cleared;
ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);
}
}
}
/*
* 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 UnloadTest
* @library /runtime/testlibrary /testlibrary /testlibrary/whitebox
* @library classes
* @build ClassUnloadCommon test.Empty
* @build UnloadTest
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI UnloadTest
*/
import sun.hotspot.WhiteBox;
/**
* Test that verifies that classes are unloaded when they are no longer reachable.
*
* The test creates a class loader, uses the loader to load a class and creates an instance
* of that class. The it nulls out all the references to the instance, class and class loader
* and tries to trigger class unloading. Then it verifies that the class is no longer
* loaded by the VM.
*/
public class UnloadTest {
private static String className = "test.Empty";
public static void main(String... args) throws Exception {
run();
}
private static void run() throws Exception {
final WhiteBox wb = WhiteBox.getWhiteBox();
ClassUnloadCommon.failIf(wb.isClassAlive(className), "is not expected to be alive yet");
ClassLoader cl = ClassUnloadCommon.newClassLoader();
Class<?> c = cl.loadClass(className);
Object o = c.newInstance();
ClassUnloadCommon.failIf(!wb.isClassAlive(className), "should be live here");
cl = null; c = null; o = null;
ClassUnloadCommon.triggerUnloading();
ClassUnloadCommon.failIf(wb.isClassAlive(className), "should have been unloaded");
}
}
package test;
public class Empty {
public String toString() { return "nothing"; }
}
/*
* 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.
*/
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Paths;
import java.util.ArrayList;
public class ClassUnloadCommon {
public static class TestFailure extends RuntimeException {
TestFailure(String msg) {
super(msg);
}
}
public static void failIf(boolean value, String msg) {
if (value) throw new TestFailure("Test failed: " + msg);
}
private static volatile Object dummy = null;
private static void allocateMemory(int kilobytes) {
ArrayList<byte[]> l = new ArrayList<>();
dummy = l;
for (int i = kilobytes; i > 0; i -= 1) {
l.add(new byte[1024]);
}
l = null;
dummy = null;
}
public static void triggerUnloading() {
allocateMemory(16 * 1024); // yg size is 8m with cms, force young collection
System.gc();
}
public static ClassLoader newClassLoader() {
try {
return new URLClassLoader(new URL[] {
Paths.get(System.getProperty("test.classes",".") + File.separatorChar + "classes").toUri().toURL(),
}, null);
} catch (MalformedURLException e){
throw new RuntimeException("Unexpected URL conversion failure", e);
}
}
}
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