Why is fork1() exported from hotspot? (original) (raw)

Thomas Stüfe thomas.stuefe at gmail.com
Wed Oct 21 12:59:41 UTC 2015

Hi Coleen,

thanks for checking!

Kind Regards, Thomas

On Wed, Oct 21, 2015 at 2:39 PM, Coleen Phillimore < coleen.phillimore at oracle.com> wrote:

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 oslinux.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

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