82 lines
3.0 KiB
Java
82 lines
3.0 KiB
Java
/*
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* Copyright (c) 2016, 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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/*
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* @test
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* @bug 8033735
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* @summary check backtrace field introspection
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* @modules java.base/jdk.internal.misc:open
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* @modules java.base/java.lang:open
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* @run main ThrowableIntrospectionSegfault
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*/
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import java.lang.reflect.*;
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public class ThrowableIntrospectionSegfault {
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public static void main(java.lang.String[] unused) {
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// Construct a throwable object.
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Throwable throwable = new Throwable();
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throwable.fillInStackTrace();
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// Retrieve a reflection handle to the private backtrace field.
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Class class1 = throwable.getClass();
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Field field;
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try {
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field = class1.getDeclaredField("backtrace");
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}
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catch (NoSuchFieldException e) {
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System.err.println("Can't retrieve field handle Throwable.backtrace: " + e.toString());
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return;
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}
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field.setAccessible(true);
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// Retrieve the value of the backtrace field.
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Object backtrace;
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try {
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backtrace = field.get(throwable);
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}
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catch (IllegalAccessException e) {
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System.err.println( "Can't retrieve field value for Throwable.backtrace: " + e.toString());
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return;
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}
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try {
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// Retrieve the class of throwable.backtrace[0][0].
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Class class2 = ((Object[]) ((Object[]) backtrace)[2])[0].getClass();
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// Segfault occurs while executing this line, to retrieve the name of
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// this class.
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String class2Name = class2.getName();
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System.err.println("class2Name=" + class2Name);
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return; // pass! Passes if it doesn't crash.
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} catch (ClassCastException e) {
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// Passes if it doesn't crash. Also if the backtrace changes this test might get
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// ClassCastException and that's ok too.
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System.out.println("Catch exception " + e);
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return; // pass! Passes if it doesn't crash.
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}
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}
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}
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