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Re: [Bug 1883560] [NEW] mips linux-user builds occasionly crash randomly
From: |
Alex Bennée |
Subject: |
Re: [Bug 1883560] [NEW] mips linux-user builds occasionly crash randomly only to be fixed by a full clean re-build |
Date: |
Fri, 19 Jun 2020 09:21:55 +0100 |
User-agent: |
mu4e 1.5.3; emacs 28.0.50 |
Cornelia Huck <cohuck@redhat.com> writes:
> On Thu, 18 Jun 2020 19:00:34 +0200
> Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> wrote:
>
>> 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.
>> >
>> >
>> >
>> Alex, Cornelia,
>>
>> Do you perhaps recall how did you obtain the original binaries (those with
>> the problem)? What would be your typical workflow? Perhaps "git-pull +
>> make" on existing, but not latest source tree?
>
> Just a bog-standard "pull some stuff, do make, create a branch and put
> some patches on it, do make, switch to another branch, do make, etc". No
> advanced fiddling with git history, doing make on a subtree, etc.
Same here. As I say the syscall_nr breakage was a different one. I'll
regularly just advance my tree and find this sort of breakage.
--
Alex Bennée