75 lines
2.7 KiB
Java
75 lines
2.7 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package nsk.jdi.HiddenClass.events;
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import java.io.File;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodHandles.Lookup;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import nsk.share.classload.ClassLoadUtils;
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/* Interface for tested hidden class to implement. */
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interface HCInterf {
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void hcMethod();
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}
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/* Hidden class definition used to define tested hidden class
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* with lookup.defineHiddenClass. */
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public class HiddenClass implements HCInterf {
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static String hcField = "<Not initialized>";
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static String getHCField() { return hcField; }
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private String getClassName() {
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return this.getClass().getName();
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}
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public void hcMethod() {
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hcField = getClassName();
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if (hcField.indexOf("HiddenClass") == -1) {
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throw new RuntimeException("Debuggee: Unexpected HiddenClass name: " + hcField);
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}
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}
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public static Class<?> defineHiddenClass() throws Exception {
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final String HC_NAME = HiddenClass.class.getName();
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final String HC_PATH = ClassLoadUtils.getClassPath(HC_NAME) + File.separator +
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HC_NAME.replace(".", File.separator) + ".class";
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Class<?> hc = defineHiddenClass(HC_PATH);
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return hc;
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}
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private static Class<?> defineHiddenClass(String classFileName) throws Exception {
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try {
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Lookup lookup = MethodHandles.lookup();
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byte[] bytes = Files.readAllBytes(Paths.get(classFileName));
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Class<?> hc = lookup.defineHiddenClass(bytes, false).lookupClass();
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return hc;
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} catch (Exception ex) {
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throw ex;
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}
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}
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}
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