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From "Andrew Cornwall (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-5507) [pack200][classlib] LocalVariableTableAttribute localVariableTableSpanO can be negative
Date Wed, 13 Feb 2008 17:07:08 GMT
[pack200][classlib] LocalVariableTableAttribute localVariableTableSpanO can be negative
---------------------------------------------------------------------------------------

                 Key: HARMONY-5507
                 URL: https://issues.apache.org/jira/browse/HARMONY-5507
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
         Environment: All Pack200
            Reporter: Andrew Cornwall


Unpacking the attached mypack.pack test case, I get an exception:

Thread [main] (Suspended (exception ArrayIndexOutOfBoundsException))	
	ArrayList<E>.get(int) line: 324	
	LocalVariableTableAttribute.renumber(List) line: 139	
	BcBands.unpack(InputStream) line: 407	
	Segment.parseSegment(InputStream) line: 325	
	Segment.parse(InputStream) line: 92	
	Unpack.main(String[]) line: 36	

This appears to be happening because LocalVariableTableAttribute.lengths[0] == -1107. This
is a value passed into LocalVariableTableAttribute(int, int[], int[], CPUTF8[], CPUTF8[],
int[]) by ClassBands.parseCodeAttrBands(InputStream, int) .

I think the decode of this value computed by:
        int[][] localVariableTableSpanO = decodeBandInt(
                "code_LocalVariableTable_span_O", in, Codec.BRANCH5,
                localVariableTableN);
 is not quite right.


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