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From Andrew Schwartzmeyer <and...@schwartzmeyer.com>
Subject Review Request 62391: Fixed invalid handle bug in `os::process()`.
Date Mon, 18 Sep 2017 20:42:55 GMT

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https://reviews.apache.org/r/62391/
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Review request for mesos, James Peach and Joseph Wu.


Bugs: MESOS-7988
    https://issues.apache.org/jira/browse/MESOS-7988


Repository: mesos


Description
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This patch fixes a bug found by running `mesos-tests` under Application
Verifier on Windows. Mesos was inadvertently attempting to get a process
handle for the System Idle Process with PID `0`, which is not permitted
by the OS. To remedy this, we now check if `os::process` receives `0`
for its argument, and return an error if so. Furthermore, we remove the
PID `0` from the `os::pids` API, as it is not useful to the programmer,
and only serves to cause errors later. Finally, the return value for
`OpenProcess` was being incorrectly checked, as the API returns a
`nullptr` on failure, not `INVALID_HANDLE_VALUE`.


Diffs
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  3rdparty/stout/include/stout/windows/os.hpp f35bf312a25066a167dc66243ad9bf8333cb36a6 


Diff: https://reviews.apache.org/r/62391/diff/1/


Testing
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Built and ran `mesos-tests` on Windows under Application Verifier. All tests pass, and the
error from `OpenProcess` is no longer being returned.


Thanks,

Andrew Schwartzmeyer


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