8219196: DataOutputStream.writeUTF may throw unexpected exceptions

Brian Burkhalter brian.burkhalter at oracle.com
Fri Mar 15 19:46:12 UTC 2019

May I ask “why” if it cannot exceed 65535?

> On Mar 15, 2019, at 12:40 PM, Martin Buchholz <martinrb at google.com> wrote:
> Consider changing utflen to a long.
> On Fri, Mar 15, 2019 at 12:25 PM Brian Burkhalter <brian.burkhalter at oracle.com <mailto:brian.burkhalter at oracle.com>> wrote:
> For [1] please review the proposed fix [2]. It is possible to preemptively detect a sufficient condition for when the length of the modified UTF-8 encoding of the string parameter will exceed the maximum allowed value and thereby avert any numerical overflow in incrementing the accumulator which counts the number of encoded characters.
> Thanks,
> Brian
> [1] https://bugs.openjdk.java.net/browse/JDK-8219196 <https://bugs.openjdk.java.net/browse/JDK-8219196>
> [2] http://cr.openjdk.java.net/~bpb/8219196/webrev.00/ <http://cr.openjdk.java.net/~bpb/8219196/webrev.00/>

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