Unused DEBUG_CLASSFILES variable in makefiles

[Severin Gehwolf]

Hi,

On Wed, 2015-02-11 at 17:52 -0500, Omair Majid wrote:
> Hi,
> 
> * Omair Majid <omajid at redhat.com> [2014-11-18 11:57]:
> > * Magnus Ihse Bursie <magnus.ihse.bursie at oracle.com> [2014-10-13 07:49]:
> > > On 2014-10-13 10:57, Erik Joelsson wrote:
> > > >I think it's still used by the hotspot makefiles (sa-jdi.jar). Seems weird
> > > >that we still set it in configure but then ignore the value in the jdk
> > > >build. I would vote for resurrecting the option.
> > > [...]
> > > >I'm not sure if even more debug levels is the right way to go. It seems
> > > >hard to name and that probably means it will be hard to understand.
> > > >Perhaps completely separating native debug level and java debug level
> > > >would make more sense?
> > > 
> > > I'm not sure "resurrecting" (which actually means adding functionality which
> > > has been gone for quite some time now) is good, since it adds to the
> > > complexity.
> > 
> > Well, we do need the debug information, but I am not at all tied to
> > specific implementation. I would be happy to try and implement something
> > that takes a different approach than resurrecting the feature.
> > 
> > > However, there have been recurring requests of having more control of debug
> > > vs release builds, and I think we need to address them in some way.
> > 
> > Any suggestions for a suitable implementation?
> 
> Sorry to resurrect an old thread, but this just bit me again.

I believe it is fair to say that this issue affects *all* Linux
distributions attempting to build from an upstream OpenJDK tree. This is
to stress that it's a significant issue and it keeps creeping up (the
issue being debug symbols in Java class files and natives - hotspot and
JDK). I'm *very* interested to help find a solution to this once and for
all.

FWIW, there are a couple of checks we perform that during Fedora OpenJDK
builds in an attempt to ensure that hotspot debug symbols are there:
http://pkgs.fedoraproject.org/cgit/java-1.8.0-openjdk.git/tree/java-1.8.0-openjdk.spec#n1160

Similarly, Java debug info is checked this way:
http://pkgs.fedoraproject.org/cgit/java-1.8.0-openjdk.git/tree/java-1.8.0-openjdk.spec#n1177

Wouldn't it be possible to add similar checks to the OpenJDK builds
system? This is to ensure that it doesn't regress again. Thoughts?

Finally, I've created this bug in order to track this:
https://bugs.openjdk.java.net/browse/JDK-8073461

Thanks,
Severin