fastdebug builds broken for jdk9/hs tree?

[David Holmes]

Hi Severin,

On 29/04/2016 2:35 AM, Severin Gehwolf wrote:
> Hi,
>
> Recently, a fastdebug build of a server JVM fails for me on Linux
> x86_64 with older sys/sdt.h and/or GCC. The same failure shows up since
> a couple of days on the Zero builder[1]:
>
> /home/sgehwolf/openjdk9-hs-pristine/hotspot/src/share/vm/services/classLoadingService.cpp: In static member function ‘static void ClassLoadingService::notify_class_loaded(InstanceKlass*, bool)’:
> /home/sgehwolf/openjdk9-hs-pristine/hotspot/src/share/vm/services/classLoadingService.cpp:148: error: cannot reload integer constant operand in ‘asm’
> /home/sgehwolf/openjdk9-hs-pristine/hotspot/src/share/vm/services/classLoadingService.cpp:148: error: cannot reload integer constant operand in ‘asm’
> gmake[4]: *** [/home/sgehwolf/openjdk9-hs-pristine/build/linux-x86_64-normal-server-fastdebug/hotspot/variant-server/libjvm/objs/classLoadingService.o] Error 1
> gmake[4]: Leaving directory `/home/sgehwolf/openjdk9-hs-pristine/hotspot/make'
>
> On that line is a macro for dtrace:
>
> void ClassLoadingService::notify_class_loaded(InstanceKlass* k, bool shared_class) {
>   DTRACE_CLASSLOAD_PROBE(loaded, k, shared_class); // <<< This fails
>
> If I compile the same file *without* -DDTRACE_ENABLE it compiles fine.
> A slowdebug build compiles fine too. I was able to *reproduce* this on
> RHEL 6. It *does not* reproduce on F23.
>
> I had a brief look at the preprocessed compilation unit for
> classLoadingService and the code that gets included for the dtrace
> macro looks different.
>
> So here the questions:
>
> 1.) Has anything related to dtrace macros changed recently?
> 2.) Has anybody else been seeing this?

This would seem to be an issue with the content of sdt.h and the version 
of gcc being used. Have either of those changed at your end? This seems 
external to the OpenJDK sources ... though perhaps there is a build 
related issue? How recently did this start - did it happen after the 
switch to the new hotspot build?

Cheers,
David
-----

> Thanks,
> Severin
>
> [1] http://builder.classpath.org/jenkins/job/OpenJDK9_hs_rt_Zero/227/console
>