91 lines
2.9 KiB
Java
91 lines
2.9 KiB
Java
/*
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* Copyright (c) 2013, 2015, 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 8021897
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* @summary Test getting the value for an uninitialized String object
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* @author Staffan Larsen
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*
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* @run build TestScaffold VMConnection TargetListener TargetAdapter
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* @run compile -g GetUninitializedStringValue.java
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* @run driver GetUninitializedStringValue
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*/
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import com.sun.jdi.ReferenceType;
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import com.sun.jdi.StackFrame;
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import com.sun.jdi.StringReference;
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import com.sun.jdi.ThreadReference;
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import com.sun.jdi.event.BreakpointEvent;
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/********** target program **********/
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class GetUninitializedStringValueTarg {
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public static void main(String[] args) {
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new String("foo");
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System.out.println("Goodbye from GetUninitializedStringValueTarg!");
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}
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}
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/********** test program **********/
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public class GetUninitializedStringValue extends TestScaffold {
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ReferenceType targetClass;
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ThreadReference mainThread;
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GetUninitializedStringValue (String args[]) {
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super(args);
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}
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public static void main(String[] args)
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throws Exception
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{
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new GetUninitializedStringValue (args).startTests();
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}
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/********** test core **********/
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protected void runTests()
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throws Exception
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{
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/*
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* Run to String.<init>
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*/
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startUp("GetUninitializedStringValueTarg");
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BreakpointEvent bpe = resumeTo("java.lang.String", "<init>", "(Ljava/lang/String;)V");
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/*
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* We've arrived. Look at 'this' - it will be uninitialized (the value field will not be set yet).
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*/
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StackFrame frame = bpe.thread().frame(0);
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StringReference sr = (StringReference)frame.thisObject();
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if (!sr.value().equals("")) {
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throw new Exception("Unexpected value for the uninitialized String");
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}
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/*
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* resume the target listening for events
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*/
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listenUntilVMDisconnect();
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}
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}
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