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Ship it!




I agree this makes the finalization logic safer, but I don't see a way to add a 
`nullptr` to the `ProcessManager::processes` map.

`ProcessManager::spawn` is the only location where the `processes` map is 
inserted, and this method CHECK-fails if you give it a `nullptr`.  Two other 
locations use the map's `operator[]`, but those are guarded by a mutex so they 
will never empty-initialize a map entry.

Can you note how you ran into a segfault here?  It's more likely that the 
segfault was caused by a dereferencing a non-`nullptr` process that had already 
been deallocated (which would not be fixed by this review).

- Joseph Wu


On June 20, 2017, 4:16 p.m., Jiang Yan Xu wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/60252/
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> 
> (Updated June 20, 2017, 4:16 p.m.)
> 
> 
> Review request for mesos and Joseph Wu.
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> We don't need and shouldn't assume pointers in `processes` are
> non-nullptr.
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> 
> Diffs
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> 
>   3rdparty/libprocess/src/process.cpp 
> 7ce6d2b13baa68906e091a95c0dd58ee1ca2bc7d 
> 
> 
> Diff: https://reviews.apache.org/r/60252/diff/1/
> 
> 
> Testing
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> 
> make check.
> 
> 
> Thanks,
> 
> Jiang Yan Xu
> 
>

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