Re: [Bug 1883560] [NEW] mips linux-user builds occasionly crash randomly only to be fixed by a full clean re-build

[Aleksandar Markovic]

четвртак, 18. јун 2020., Cornelia Huck <cohuck@redhat.com> је написао/ла:
> On Mon, 15 Jun 2020 15:18:48 -0000
> Alex Bennée <1883560@bugs.launchpad.net> wrote:
>
> > Public bug reported:
> > 
> > >From time to time I find check-tcg crashes with a one of the MIPS  
> > binaries. The last time it crashed was running the test:
> > 
> >   ./mips64el-linux-user/qemu-mips64el ./tests/tcg/mips64el-linux-
> > user/threadcount
> > 
> > Inevitably after some time noodling around wondering what could be
> > causing this weird behaviour I wonder if it is a build issue. I wipe all
> > the mips* build directories, re-run configure and re-build and voila
> > problem goes away.
> > 
> > It seems there must be some sort of build artefact which isn't being
> > properly re-generated on a build update which causes weird problems.
> > Additional data point if I:
> > 
> >   rm -rf mips64el-linux-user
> >   ../../configure
> >   make
> > 
> > then I see failures in mip32 builds - eg:
> > 
> >     GEN     mipsn32el-linux-user/config-target.h
> >   In file included from /home/alex/lsrc/qemu.git/linux-user/syscall_defs.h:10,
> >                    from /home/alex/lsrc/qemu.git/linux-user/qemu.h:16,
> >                    from /home/alex/lsrc/qemu.git/linux-user/linuxload.c:5:
> >   /home/alex/lsrc/qemu.git/linux-user/mips64/syscall_nr.h:1: error: unterminated #ifndef
> >    #ifndef LINUX_USER_MIPS64_SYSCALL_NR_H
> > 
> >   make[1]: *** [/home/alex/lsrc/qemu.git/rules.mak:69: linux-user/linuxload.o] Error 1
> >   make[1]: *** Waiting for unfinished jobs....
> > 
> > which implies there is a cross dependency between different targets
> > somewhere. If I executed:
> > 
> >   rm -rf mips*
> > 
> > before re-configuring and re-building then everything works again.
> > 
> > ** Affects: qemu
> >      Importance: Undecided
> >          Status: New
> > 
> > 
> > ** Tags: build linux-user mips
> > 
>
> FWIW, this does not seem to be a mips-only issue: I'm seeing the
> threadcount test fail with s390x-linux-user as well, and it also goes
> away (only) if I purge the build directory, re-configure, and re-build.

Valuable info!