79 lines
2.7 KiB
Java
79 lines
2.7 KiB
Java
/*
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* Copyright (c) 2022, 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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import java.util.concurrent.Semaphore;
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class ClassLoadingThread extends Thread {
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private ClassLoader ldr = null;
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private int which;
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private Semaphore syncOrder;
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public ClassLoadingThread(ClassLoader loader, int i, Semaphore sem) {
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ldr = loader;
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which = i;
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syncOrder = sem;
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}
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private boolean success = true;
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public boolean report_success() { return success; }
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public void callForName() {
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try {
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ThreadPrint.println("Starting forName thread ...");
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// Initiate class loading using specified type
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Class<?> a = Class.forName("A", true, ldr);
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Object obj = a.getConstructor().newInstance();
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} catch (Throwable e) {
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ThreadPrint.println("Exception is caught: " + e);
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e.printStackTrace();
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success = false;
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}
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}
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public void callLoadClass() {
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try {
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ThreadPrint.println("Starting loadClass thread ...");
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Class<?> a = ldr.loadClass("A");
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Object obj = a.getConstructor().newInstance();
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success = false; // Should have thrown LinkageError
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} catch (Throwable e) {
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// If you call loadClass directly, this will result in LinkageError
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ThreadPrint.println("Exception is caught: " + e);
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e.printStackTrace();
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success = (e instanceof LinkageError);
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}
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}
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public void run() {
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if (which == 0) {
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callLoadClass();
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} else {
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try {
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syncOrder.acquire(); // wait until loadClass is waiting.
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} catch (InterruptedException idc) {}
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callForName();
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}
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}
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}
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