RFR: 8276651: java/lang/ProcessHandle/InfoTest.java failed with "RuntimeException: Input/output error"

[Roger Riggs]

On Fri, 19 Aug 2022 17:05:38 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> On Mac OS X on aarch64, the timing of the sysctl vs the process life (pid) can be such that the sysctl returns EIO.
> The native implementation is modified to treat EIO the same as EINVAL, leaving the information to be returned empty.
> 
> Several tests in java/lang/ProcessHandle failed with the same cause including OnExitTest, InfoTest, and TreeTest.

The failing tests don't implicate the sysctl at 191 so I'm cautious about changing the code in that case.
The spec for `ProcessHandle.info()` does not declare any exceptions so there is little risk changing the behavior by quietly returning in the case of EINVAL or EIO to make the cases similar when querying a pid.

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PR: https://git.openjdk.org/jdk/pull/9946