Why is fork1() exported from hotspot?

[Coleen Phillimore]

This change was a contribution from the openjdk that I sponsored, maybe 
from someone from RedHat.

I don't remember why we kept fork1().  Remove it if it appears unused.  
It may be from some code that has been changed since then.

Coleen


On 10/21/15 4:57 AM, Lindenmaier, Goetz wrote:
> Hi,
>
> the comment was added in 2011 by
> "6588413: Use -fvisibility=hidden for gcc compiles"
> http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/d70fe6ab4436
> while the export & function already existed.
>
> Unfortunately, this change doesn't unveil who is using the symbol.
>
> Best regards,
>    Goetz.
>
>> -----Original Message-----
>> From: hotspot-runtime-dev [mailto:hotspot-runtime-dev-
>> bounces at openjdk.java.net] On Behalf Of Christian Thalinger
>> Sent: Mittwoch, 21. Oktober 2015 01:56
>> To: Thomas Stüfe
>> Cc: hotspot-runtime-dev at openjdk.java.net
>> Subject: Re: Why is fork1() exported from hotspot?
>>
>>
>>> On Oct 19, 2015, at 9:14 PM, Thomas Stüfe <thomas.stuefe at gmail.com>
>> wrote:
>>> Hi all,
>>>
>>> on Linux we define and export "fork1()" - a stub for fork() - and "fork1"
>>> also appears in linker mapfiles for bsd and AIX. The latter, I am sure, is
>>> just a copy-paste-effect.
>>>
>>> Why do we need to define and export fork1() for non-solaris platforms?
>> We
>>> only ever use it on Solaris.
>>>
>>> The comment in os_linux.cpp is not really enlightening:
>>> "// Something to do with the numa-aware allocator needs these symbols”
>> Can you see what changeset added this comment or was it before Mercurial?
>>
>>> Does anyone know why this is needed?
>>>
>>> Regards, Thomas