src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/CustomizedBytecodePatternTest.java
/*
* Copyright (c) 2018, 2019, 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.
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package org.graalvm.compiler.core.test;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.Method;
import java.security.ProtectionDomain;
import org.graalvm.compiler.serviceprovider.JavaVersionUtil;
import org.objectweb.asm.Opcodes;
import sun.misc.Unsafe;
public abstract class CustomizedBytecodePatternTest extends GraalCompilerTest implements Opcodes {
protected Class<?> getClass(String className) throws ClassNotFoundException {
return new CachedLoader(CustomizedBytecodePatternTest.class.getClassLoader(), className).findClass(className);
}
/**
* @param className
* @param lookUp lookup object with boot class load capability (required for jdk 9 and above)
* @return loaded class
* @throws ClassNotFoundException
*/
protected Class<?> getClassBL(String className, MethodHandles.Lookup lookUp) throws ClassNotFoundException {
byte[] gen = generateClass(className.replace('.', '/'));
Method defineClass = null;
Class<?> loadedClass = null;
try {
if (JavaVersionUtil.JAVA_SPEC <= 8) {
defineClass = Unsafe.class.getDeclaredMethod("defineClass", String.class, byte[].class, int.class, int.class, ClassLoader.class, ProtectionDomain.class);
loadedClass = (Class<?>) defineClass.invoke(UNSAFE, className, gen, 0, gen.length, null, null);
} else {
defineClass = MethodHandles.lookup().getClass().getDeclaredMethod("defineClass", byte[].class);
loadedClass = (Class<?>) defineClass.invoke(lookUp, gen);
}
} catch (Exception e) {
throw new ClassNotFoundException(className, e);
}
return loadedClass;
}
private class CachedLoader extends ClassLoader {
final String className;
Class<?> loaded;
CachedLoader(ClassLoader parent, String className) {
super(parent);
this.className = className;
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
if (name.equals(className)) {
if (loaded == null) {
byte[] gen = generateClass(name.replace('.', '/'));
loaded = defineClass(name, gen, 0, gen.length);
}
return loaded;
} else {
return super.findClass(name);
}
}
}
protected abstract byte[] generateClass(String internalClassName);
}