CSR for posix_spawn on JDK 12

[Roger Riggs]

Hi Thomas,

On 11/30/2018 02:06 PM, Thomas Stüfe wrote:
> Hi Roger,
>
> I updated the CSR according to your feedback. I'm a bit at a loss
> about the specification though. How should I specify the behavior of
> the API without describing the implementation?
What you wrote is fine. It does need to mention posix_spawn by name,
as that is the OS function being used.

The notes about the behavior of libc, fit better as an explanation
in the description of the Solution than in the Specification section.

>
> Also, since this patch only extends an existing implementation to
> Linux, I would have thought there are there technical notes in place
> describing POSIX_SPAWN on other platforms, which I would have just
> refered to. I searched but could not really find anything.
Nope, that's why it was a debugging tool for Martin,
not a documented implementation feature.

I'm not sure what the proper plural of Unix's is but Unices looks odd.
Perhaps avoid the issue and just say Unix platforms.

Thanks, Roger

>
> Thanks, Thomas
>
>
> On Fri, Nov 30, 2018 at 3:50 PM Roger Riggs <Roger.Riggs at oracle.com> wrote:
>> Hi Thomas,
>>
>> Looks pretty good.
>>
>> Usually 'we' avoid the first person writing in the jira.
>> It makes them more readable in the long term, when there is no context for 'we'.
>>
>> - Describing it as 'experimental' gives the wrong impression
>> and has some magnified implications as that term is being used for
>> other major changes.
>>
>> - The compatibility risk should be corrected:
>>
>> Supplying an unknown value on the command line produces a java.lang.Error.
>>
>> % java -Djdk.lang.Process.launchMechanism=POSIX_SPAWN ...
>>
>> java.lang.Error: POSIX_SPAWN is not a supported process launch mechanism on this platform.
>>
>> - Since CSRs should be self contained, the specification section should explicitly
>> specify the behavior from the API point of view. CSRs should avoid describing
>> the implementation (though in this case, its not entirely possible).
>> The webrev of the impl is not relevant.
>>
>> Thanks, Roger
>>
>>
>> On 11/30/2018 03:32 AM, Thomas Stüfe wrote:
>>
>> CSR for jdk12: https://bugs.openjdk.java.net/browse/JDK-8214511
>>
>> ..Thomas
>>
>>