[OpenJDK 2D-Dev]  Review Request: 8042103 Deserialization of empty java.awt.geom.Path2D will cause an exception
andrew.brygin at oracle.com
Mon May 26 14:01:00 UTC 2014
the fix looks good to me.
On 5/23/2014 10:34 PM, Sergey Bylokhov wrote:
> Any volunteers to review the fix?
> On 5/5/14 5:30 PM, Sergey Bylokhov wrote:
>> Hi, Jim.
>> On 01.05.2014 4:44, Jim Graham wrote:
>>> Hi Sergey,
>>> I think the bug is in the readObject routine. It sets the initial
>>> size of the arrays based on if the number of segments/coords is "<
>>> 0" and it sets them to INIT_SIZE or INIT_SIZE*2 accordingly. Those
>>> tests should be "< INIT_SIZE(*2)"...
>> It was my first thought, but we have an API, which allows to set
>> starting value of capacity to 0.
>> Copy from the bug description:
>> 1.Path2D path = Path2D.Float(int rule, int initialCapacity); while
>> initialCapacity is 0
>> 2.Path2D path = Path2D.Double(int rule, int initialCapacity);
>> 3.Path2D path = Path2D.Float(Shape s); while s is empty Path2D
>> 4.Path2D path = Path2D.Float(Shape s, AffineTransform at);
>> 5.Path2D path = Path2D.Double(Shape s);
>> 6.Path2D path = Path2D.Double(Shape s, AffineTransform at);
>> based on these I assume that empty capacity is correct value, and
>> needRoom should be ready for that.
>>> On 4/30/14 8:52 AM, Sergey Bylokhov wrote:
>>>> Please review the fix for jdk 9.
>>>> needRoom() method does not take into account that current array of
>>>> can be empty. In this case it fails to increase it.
>>>> I handle this case and increase the size of the array by 1 instead of
>>>> INIT_SIZE, because I assume that the user intentionally try to
>>>> memory usage.
>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8042103
>>>> Webrev can be found at:
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