122 lines
4.3 KiB
Java
122 lines
4.3 KiB
Java
/*
|
|
* Copyright (c) 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.
|
|
*
|
|
* 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 8139551
|
|
* @summary Scalability problem with redefinition - multiple code cache walks
|
|
* @requires vm.jvmti
|
|
* @library /test/lib
|
|
* @modules java.base/jdk.internal.misc
|
|
* @modules java.compiler
|
|
* java.instrument
|
|
* jdk.jartool/sun.tools.jar
|
|
* @run main RedefineClassHelper
|
|
* @run main/othervm/timeout=180 -javaagent:redefineagent.jar -XX:CompileThreshold=100 -Xlog:redefine+class+nmethod=debug TestMultipleClasses
|
|
*/
|
|
|
|
import java.lang.instrument.*;
|
|
import java.lang.reflect.*;
|
|
import jdk.test.lib.compiler.InMemoryJavaCompiler;
|
|
|
|
public class TestMultipleClasses extends ClassLoader {
|
|
|
|
public static String B(int count) {
|
|
return new String("public class B" + count + " {" +
|
|
" public static void compiledMethod() { " +
|
|
" try{" +
|
|
" Thread.sleep(1); " +
|
|
" } catch(InterruptedException ie) {" +
|
|
" }" +
|
|
" }" +
|
|
"}");
|
|
}
|
|
|
|
static String newB(int count) {
|
|
return new String("public class B" + count + " {" +
|
|
" public static void compiledMethod() { " +
|
|
" System.out.println(\"compiledMethod called " + count + "\");" +
|
|
" }" +
|
|
"}");
|
|
}
|
|
|
|
static int index = 0;
|
|
|
|
@Override
|
|
protected Class<?> findClass(String name) throws ClassNotFoundException {
|
|
if (name.equals("B" + index)) {
|
|
byte[] b = InMemoryJavaCompiler.compile(name, B(index));
|
|
return defineClass(name, b, 0, b.length);
|
|
} else {
|
|
return super.findClass(name);
|
|
}
|
|
}
|
|
|
|
static void runCompiledMethodMethods(Class c, int count) throws Exception {
|
|
// Run for a while so they compile.
|
|
Object o = c.newInstance();
|
|
Method m = c.getMethod("compiledMethod");
|
|
for (int i = 0; i < count; i++) {
|
|
m.invoke(o);
|
|
}
|
|
}
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
|
|
final int numberOfClasses = 20;
|
|
Class[] classes = new Class[numberOfClasses];
|
|
byte[][] newClass = new byte[numberOfClasses][];
|
|
ClassDefinition[] defs = new ClassDefinition[numberOfClasses];
|
|
|
|
TestMultipleClasses loader = new TestMultipleClasses();
|
|
|
|
// Load and start all the classes.
|
|
for (index = 0; index < numberOfClasses; index++) {
|
|
String name = new String("B" + index);
|
|
Class c = loader.findClass(name);
|
|
|
|
runCompiledMethodMethods(c, 500);
|
|
// Make class definition for redefinition
|
|
classes[index] = c;
|
|
newClass[index] = InMemoryJavaCompiler.compile(c.getName(), newB(index));
|
|
defs[index] = new ClassDefinition(c, newClass[index]);
|
|
}
|
|
|
|
long startTime = System.currentTimeMillis();
|
|
|
|
// Redefine all classes.
|
|
RedefineClassHelper.instrumentation.redefineClasses(defs);
|
|
|
|
long endTime = System.currentTimeMillis();
|
|
|
|
System.out.println("Redefinition took " + (endTime - startTime) + " milliseconds");
|
|
|
|
System.gc();
|
|
|
|
// Run all new classes.
|
|
for (index = 0; index < numberOfClasses; index++) {
|
|
runCompiledMethodMethods(classes[index], 1);
|
|
}
|
|
}
|
|
}
|