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* Re: libgcj/3523: java.io.LineNumberReader has a buggy reset() method.
@ 2001-07-01 22:18 tromey
0 siblings, 0 replies; 3+ messages in thread
From: tromey @ 2001-07-01 22:18 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, java-prs, jwnimmer, nobody, tromey
Synopsis: java.io.LineNumberReader has a buggy reset() method.
Responsible-Changed-From-To: unassigned->tromey
Responsible-Changed-By: tromey
Responsible-Changed-When: Sun Jul 1 22:18:26 2001
Responsible-Changed-Why:
I'm handling the PR.
State-Changed-From-To: open->closed
State-Changed-By: tromey
State-Changed-When: Sun Jul 1 22:18:26 2001
State-Changed-Why:
I agree with the enclosed patch and I have checked it in.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3523&database=gcc
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: libgcj/3523: java.io.LineNumberReader has a buggy reset() method.
@ 2001-07-01 22:16 Tom Tromey
0 siblings, 0 replies; 3+ messages in thread
From: Tom Tromey @ 2001-07-01 22:16 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libgcj/3523; it has been noted by GNATS.
From: Tom Tromey <tromey@redhat.com>
To: jwnimmer@alum.mit.edu
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: libgcj/3523: java.io.LineNumberReader has a buggy reset() method.
Date: 01 Jul 2001 23:34:25 -0600
>>>>> "Jeremy" == jwnimmer <jwnimmer@alum.mit.edu> writes:
Jeremy> - lineNumber -= countLines(buffer, pos, markPos);
Jeremy> + lineNumber -= countLines(buffer, markPos, pos-markPos);
I agree this is correct.
I am going to check it in and close the PR.
Thanks for finding and fixing this.
Tom
^ permalink raw reply [flat|nested] 3+ messages in thread
* libgcj/3523: java.io.LineNumberReader has a buggy reset() method.
@ 2001-07-01 19:56 jwnimmer
0 siblings, 0 replies; 3+ messages in thread
From: jwnimmer @ 2001-07-01 19:56 UTC (permalink / raw)
To: gcc-gnats
>Number: 3523
>Category: libgcj
>Synopsis: java.io.LineNumberReader has a buggy reset() method.
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Jul 01 19:56:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Jeremy Nimmer
>Release: gcc version 3.1 20010630 (experimental)
>Organization:
>Environment:
i686-pc-linux-gnu, configured with: configure --enable-threads=posix --enable-shared --enable-languages=c++,java
>Description:
The implementation of the reset() method in java.io.LineNumberReader passes invalid arguments to the countLines method, causing it to index the array out of bounds under certain circumstances.
>How-To-Repeat:
Compile this program to bytecode (with javac, jikes, or gcj) and then run with gij.
import java.io.*;
public class CrashLNR {
public static void main(String[] args)
throws Exception
{
String s = "123456789\n123456789\n1234\n1234\n";
LineNumberReader r = new LineNumberReader(new StringReader(s), 35);
r.readLine();
r.readLine();
r.mark(10);
r.readLine();
r.reset(); // exception
}
}
>Fix:
Here is my suggested patch, but I have not tested it thoroughly.
% diff -u LineNumberReader.java LineNumberReader.java.fixed
--- LineNumberReader.java Tue Mar 7 14:55:26 2000
+++ LineNumberReader.java.fixed Sun Jul 1 22:27:14 2001
@@ -94,7 +94,7 @@
if (markPos > 0 && pos > markPos && buffer[markPos-1] == '\r'
&& buffer[markPos] == '\n')
lineNumber--;
- lineNumber -= countLines(buffer, pos, markPos);
+ lineNumber -= countLines(buffer, markPos, pos-markPos);
pos = markPos;
}
}
>Release-Note:
>Audit-Trail:
>Unformatted:
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