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8021897: EXCEPTION_ACCESS_VIOLATION on debugging String.contentEquals()

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Reviewed-by: alanb, sspitsyn
This commit is contained in:
Staffan Larsen 2013-10-18 11:52:24 +02:00
parent 73ccbeb833
commit d8fad522ed
2 changed files with 92 additions and 3 deletions
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4
jdk/src/share/back/outStream.c
View File

@ -298,17 +298,15 @@ jdwpError
outStream_writeString(PacketOutputStream *stream, char *string)
{
jdwpError error;
jint length;
jint length = string != NULL ? (int)strlen(string) : 0;
/* Options utf8=y/n controls if we want Standard UTF-8 or Modified */
if ( gdata->modifiedUtf8 ) {
length = (int)strlen(string);
(void)outStream_writeInt(stream, length);
error = writeBytes(stream, (jbyte *)string, length);
} else {
jint new_length;
length = (int)strlen(string);
new_length = (gdata->npt->utf8mToUtf8sLength)
(gdata->npt->utf, (jbyte*)string, length);
if ( new_length == length ) {

91
jdk/test/com/sun/jdi/GetUninitializedStringValue.java Normal file
View File

@ -0,0 +1,91 @@
/*
* Copyright (c) 2013, 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.
*/
/**
* @test
* @bug 8021897
* @summary Test getting the value for an uninitialized String object
*
* @author Staffan Larsen
*
* @run build TestScaffold VMConnection TargetListener TargetAdapter
* @run compile -g GetUninitializedStringValue.java
* @run main GetUninitializedStringValue
*/
import com.sun.jdi.ReferenceType;
import com.sun.jdi.StackFrame;
import com.sun.jdi.StringReference;
import com.sun.jdi.ThreadReference;
import com.sun.jdi.event.BreakpointEvent;
/********** target program **********/
class GetUninitializedStringValueTarg {
public static void main(String[] args) {
new String("foo");
System.out.println("Goodbye from GetUninitializedStringValueTarg!");
}
}
/********** test program **********/
public class GetUninitializedStringValue extends TestScaffold {
ReferenceType targetClass;
ThreadReference mainThread;
GetUninitializedStringValue (String args[]) {
super(args);
}
public static void main(String[] args)
throws Exception
{
new GetUninitializedStringValue (args).startTests();
}
/********** test core **********/
protected void runTests()
throws Exception
{
/*
* Run to String.<init>
*/
startUp("GetUninitializedStringValueTarg");
BreakpointEvent bpe = resumeTo("java.lang.String", "<init>", "(Ljava/lang/String;)V");
/*
* We've arrived. Look at 'this' - it will be uninitialized (the value field will not be set yet).
*/
StackFrame frame = bpe.thread().frame(0);
StringReference sr = (StringReference)frame.thisObject();
if (!sr.value().equals("")) {
throw new Exception("Unexpected value for the uninitialized String");
}
/*
* resume the target listening for events
*/
listenUntilVMDisconnect();
}
}