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/*
* Copyright (c) 2020, 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 nsk.jdi.HiddenClass.events;
import java.io.File;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.nio.file.Files;
import java.nio.file.Paths;
import nsk.share.classload.ClassLoadUtils;
/* Interface for tested hidden class to implement. */
interface HCInterf {
void hcMethod();
}
/* Hidden class definition used to define tested hidden class
* with lookup.defineHiddenClass. */
public class HiddenClass implements HCInterf {
static String hcField = "<Not initialized>";
static String getHCField() { return hcField; }
private String getClassName() {
return this.getClass().getName();
}
public void hcMethod() {
hcField = getClassName();
if (hcField.indexOf("HiddenClass") == -1) {
throw new RuntimeException("Debuggee: Unexpected HiddenClass name: " + hcField);
}
}
public static Class<?> defineHiddenClass() throws Exception {
final String HC_NAME = HiddenClass.class.getName();
final String HC_PATH = ClassLoadUtils.getClassPath(HC_NAME) + File.separator +
HC_NAME.replace(".", File.separator) + ".class";
Class<?> hc = defineHiddenClass(HC_PATH);
return hc;
}
private static Class<?> defineHiddenClass(String classFileName) throws Exception {
try {
Lookup lookup = MethodHandles.lookup();
byte[] bytes = Files.readAllBytes(Paths.get(classFileName));
Class<?> hc = lookup.defineHiddenClass(bytes, false).lookupClass();
return hc;
} catch (Exception ex) {
throw ex;
}
}
}
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