jdk-24/test/hotspot/jtreg/serviceability/jvmti/RedefineClasses/TransformerDeadlockTest.java
Leo Korinth d52a995f35 8315097: Rename createJavaProcessBuilder
Reviewed-by: lmesnik, dholmes, rriggs, stefank
2023-10-27 08:47:26 +00:00

119 lines
4.2 KiB
Java

/*
* Copyright (c) 2020, 2023, 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
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*/
/**
* @test
* @bug 8241390
* @summary Test recursively retransforms the same class. The test hangs if
* a deadlock happens.
* @requires vm.jvmti
* @requires vm.flagless
* @library /test/lib
* @modules java.instrument
* @compile TransformerDeadlockTest.java
* @run driver TransformerDeadlockTest
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.helpers.ClassFileInstaller;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.instrument.Instrumentation;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.ProtectionDomain;
public class TransformerDeadlockTest {
private static String manifest = "Premain-Class: " +
TransformerDeadlockTest.Agent.class.getName() + "\n"
+ "Can-Retransform-Classes: true\n"
+ "Can-Retransform-Classes: true\n";
private static String CP = System.getProperty("test.classes");
public static void main(String args[]) throws Throwable {
String agentJar = buildAgent();
ProcessTools.executeProcess(
ProcessTools.createLimitedTestJavaProcessBuilder(
"-javaagent:" + agentJar,
TransformerDeadlockTest.Agent.class.getName())
).shouldHaveExitValue(0);
}
private static String buildAgent() throws Exception {
Path jar = Files.createTempFile(Paths.get("."), null, ".jar");
String jarPath = jar.toAbsolutePath().toString();
ClassFileInstaller.writeJar(jarPath,
ClassFileInstaller.Manifest.fromString(manifest),
TransformerDeadlockTest.class.getName());
return jarPath;
}
public static class Agent implements ClassFileTransformer {
private static Instrumentation instrumentation;
public static void premain(String agentArgs, Instrumentation inst) {
instrumentation = inst;
}
@Override
public byte[] transform(
ClassLoader loader,
String className,
Class<?> classBeingRedefined,
ProtectionDomain protectionDomain,
byte[] classfileBuffer)
throws IllegalClassFormatException {
if (!TransformerDeadlockTest.class.getName().replace(".", "/").equals(className)) {
return null;
}
invokeRetransform();
return classfileBuffer;
}
public static void main(String[] args) throws Exception {
instrumentation.addTransformer(new TransformerDeadlockTest.Agent(), true);
try {
instrumentation.retransformClasses(TransformerDeadlockTest.class);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private static void invokeRetransform() {
try {
instrumentation.retransformClasses(TransformerDeadlockTest.class);
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
}
}
}
}