101 lines
4.7 KiB
Java
101 lines
4.7 KiB
Java
/*
|
|
* Copyright (c) 2016, 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.
|
|
*/
|
|
|
|
package gc.g1.humongousObjects;
|
|
|
|
import gc.testlibrary.Helpers;
|
|
|
|
import java.io.IOException;
|
|
import java.nio.file.Path;
|
|
import java.nio.file.Paths;
|
|
|
|
/**
|
|
* Generates non-humongous and humongous class loaders.
|
|
* Since the generation depends on current host architecture it cannot be done as part of pre-compilation step
|
|
*/
|
|
public class ClassLoaderGenerator {
|
|
public static void main(String[] args) throws Exception {
|
|
|
|
if (args.length != 1) {
|
|
throw new Error("Test Bug: Expected region size wasn't provided as command line argument");
|
|
}
|
|
|
|
long regionSize = Long.parseLong(args[0]) * 1024 * 1024;
|
|
|
|
Path wrkDir = Paths.get("");
|
|
generateClassLoader(regionSize, wrkDir);
|
|
|
|
}
|
|
|
|
public static void generateClassLoader(long regionSize, Path wrkDir) throws Exception {
|
|
// Generating simple classloader
|
|
String finalSimpleClassLoaderPrototype = TestHumongousClassLoader.GENERIC_PROTOTYPE
|
|
.replace("${Methods}",
|
|
TestHumongousClassLoader.LOAD_CLASS_METHOD_PROTOTYPE
|
|
.replace("${ClassLoadFilter}",
|
|
"fileName.equals(\"" + TestHumongousClassLoader.HUMONGOUS_CLASSLOADER_NAME
|
|
+ "\")"))
|
|
.replace("${ClassHeader}", TestHumongousClassLoader.CLASS_HEADER)
|
|
.replace("${ConstructorClause}", TestHumongousClassLoader.CONSTUCTOR_PROTOTYPE);
|
|
|
|
Helpers.generateByTemplateAndCompile(TestHumongousClassLoader.SIMPLE_CLASSLOADER_NAME, "ClassLoader",
|
|
finalSimpleClassLoaderPrototype, TestHumongousClassLoader.CONSTUCTOR_PROTOTYPE, regionSize / 4,
|
|
wrkDir, TestHumongousClassLoader.SIMPLE_CLASSLOADER_NAME + "Base");
|
|
|
|
|
|
// Preparations for generating humongous classloader
|
|
|
|
// Generating condition for loadClass method of generated class loader
|
|
// We want the generated class loader to load only classes from G1SampleClass enum
|
|
// All other classes should be loaded by parent classloader
|
|
// As result we get full loadClass method
|
|
StringBuilder classesToLoadBuilder = new StringBuilder();
|
|
for (G1SampleClass g1SampleClass : G1SampleClass.values()) {
|
|
if (classesToLoadBuilder.length() != 0) {
|
|
classesToLoadBuilder.append(" || ");
|
|
}
|
|
classesToLoadBuilder.append("fileName.startsWith(\"" + Helpers.enumNameToClassName(g1SampleClass.name())
|
|
+ "\")");
|
|
}
|
|
|
|
// Generating final class loader prototype - with specified methods,header and constructor
|
|
String finalHumongousClassLoaderPrototype = TestHumongousClassLoader.GENERIC_PROTOTYPE
|
|
.replace("${Methods}",
|
|
TestHumongousClassLoader.LOAD_CLASS_METHOD_PROTOTYPE
|
|
.replace("${ClassLoadFilter}", classesToLoadBuilder))
|
|
.replace("${ClassHeader}", TestHumongousClassLoader.CLASS_HEADER)
|
|
.replace("${ConstructorClause}", TestHumongousClassLoader.CONSTUCTOR_PROTOTYPE);
|
|
|
|
|
|
// Generating humongous classloader with specified name, base class, final class prototype and
|
|
// constructor prototype for filler classes
|
|
// Generated class instance should be humongous since we specify size of (regionSize * 3 / 4)
|
|
Helpers.generateByTemplateAndCompile(TestHumongousClassLoader.HUMONGOUS_CLASSLOADER_NAME, "ClassLoader",
|
|
finalHumongousClassLoaderPrototype, TestHumongousClassLoader.CONSTUCTOR_PROTOTYPE,
|
|
regionSize * 3 / 4,
|
|
wrkDir, TestHumongousClassLoader.HUMONGOUS_CLASSLOADER_NAME + "Base");
|
|
|
|
|
|
}
|
|
}
|