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/*
* Copyright (c) 2016, 2024, 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 ClassLoadUnloadTest
* @bug 8142506
* @requires vm.flagless
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @library classes
* @build test.Empty
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run driver ClassLoadUnloadTest
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import java.lang.ref.WeakReference;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import jdk.test.lib.classloader.ClassUnloadCommon;
public class ClassLoadUnloadTest {
private static class ClassUnloadTestMain {
public static void main(String... args) throws Exception {
String className = "test.Empty";
ClassLoader cl = ClassUnloadCommon.newClassLoader();
Class<?> c = cl.loadClass(className);
cl = null; c = null;
ClassUnloadCommon.triggerUnloading();
}
}
static void checkFor(OutputAnalyzer output, String... outputStrings) throws Exception {
for (String s: outputStrings) {
output.shouldContain(s);
}
}
static void checkAbsent(OutputAnalyzer output, String... outputStrings) throws Exception {
for (String s: outputStrings) {
output.shouldNotContain(s);
}
}
// Use the same command-line heap size setting as ../ClassUnload/UnloadTest.java
static OutputAnalyzer exec(String... args) throws Exception {
String classPath = System.getProperty("test.class.path", ".");
// Sub-process does not get all the properties automatically, so the test class path needs to be passed explicitly
List<String> argsList = new ArrayList<>();
Collections.addAll(argsList, args);
Collections.addAll(argsList, "-Xmn8m", "-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions",
"-XX:+WhiteBoxAPI", "-XX:+ClassUnloading", "-Dtest.class.path=" + classPath, ClassUnloadTestMain.class.getName());
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(argsList);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(0);
return output;
}
public static void main(String... args) throws Exception {
OutputAnalyzer output;
// -Xlog:class+unload=info
output = exec("-Xlog:class+unload=info");
checkFor(output, "[class,unload]", "unloading class test.Empty");
// -Xlog:class+unload=off
output = exec("-Xlog:class+unload=off");
checkAbsent(output,"[class,unload]");
// -Xlog:class+load=info
output = exec("-Xlog:class+load=info");
checkFor(output,"[class,load]", "java.lang.Object", "source:");
// -Xlog:class+load=debug
output = exec("-Xlog:class+load=debug");
checkFor(output,"[class,load]", "java.lang.Object", "source:", "klass:", "super:", "loader:", "bytes:");
// -Xlog:class+load=off
output = exec("-Xlog:class+load=off");
checkAbsent(output,"[class,load]");
// -verbose:class
output = exec("-verbose:class");
checkFor(output,"[class,load]", "java.lang.Object", "source:");
checkFor(output,"[class,unload]", "unloading class");
// -Xlog:class+loader+data=trace
output = exec("-Xlog:class+loader+data=trace");
checkFor(output, "[class,loader,data]", "create loader data");
}
}
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