[llvm-dev] Go Tsan check failure

Tue Jan 30 06:53:44 PST 2018

I started running into this after moving to a new machine. When building
check-all, I get:

/work/llvm-6.0/llvm.src/projects/compiler-rt/lib/tsan/go/buildgo.sh: line
152: 53639 Segmentation fault

running it with SILENT=0:

cd /work/llvm-6.0/llvm.src/projects/compiler-rt/lib/tsan/go && env
"CC=/usr/bin/cc " IN_TMPDIR=1 SILENT=0 /work/llvm-6.0/llvm.src/
projects/compiler-rt/lib/tsan/go/buildgo.sh
/usr/bin/cc gotsan.cc -c -o /tmp/gotsan.WEnzff9pjs/race_linux_amd64.syso
-I../rtl -I../.. -I../../sanitizer_common -I../../../include -std=c++11
-m64 -Wall -fno-exceptions -fno-rtti -DSANITIZER_GO=1
-DSANITIZER_DEADLOCK_DETECTOR_VERSION=2 -fPIC -ffreestanding
-Wno-maybe-uninitialized -Wno-unused-const-variable -Werror
-Wno-unknown-warning-option -DSANITIZER_DEBUG=0 -O3 -msse3
-fomit-frame-pointer
==54479==ERROR: ThreadSanitizer failed to allocate 0x4000 (16384) bytes at
address 17923b3080000 (errno: 12)
/work/llvm-6.0/llvm.src/projects/compiler-rt/lib/tsan/go/buildgo.sh: line
152: 54479 Segmentation fault      $DIR/test

It seems the problem might be with the gcc version used. For me,
/usr/bin/cc is GCC (Debian 6.3.0-18)

If I set CC to a newly-built Clang it works, so this doesn't affect my
bootstrapped builds, but it does affect the non-bootstrapped ones.

I'm not sure what to do here.

On Tue, Nov 28, 2017 at 9:55 AM, Dmitry Vyukov via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> I guess there is lots of stuff that you don't care about besides
> tsan/go that is built and tested during llvm build, and there is no
> way to selectively disable each one of that. By design.
> In the long run we need to fix all failures (please file a proper
> bug). If you are looking for a temporal workaround, then comment it
> out. I don't what else to suggest.
>
>
> On Tue, Nov 28, 2017 at 9:47 AM, Csaba Raduly <rcsaba at gmail.com> wrote:
> > Hi,
> > I want to build clang successfully :) I don't care about Go.
> >
> > buildgo.sh is invoked directly by ninja. I don't want to modify the
> > (generated) build.ninja
> >
> > The "SILENT=1" is hard-coded into build.ninja and ninja -v has no effect
> on it.
> >
> > I tried passing  -DLLVM_INCLUDE_GO_TESTS=OFF to cmake but the result
> > was the same.
> >
> > Csaba
> >
> > On Tue, Nov 28, 2017 at 7:27 AM, Dmitry Vyukov <dvyukov at google.com>
> wrote:
> >> On Tue, Nov 28, 2017 at 12:16 AM, Kostya Serebryany <kcc at google.com>
> wrote:
> >>> +dvyukov
> >>>
> >>> On Mon, Nov 27, 2017 at 4:56 AM, Csaba Raduly via llvm-dev
> >>> <llvm-dev at lists.llvm.org> wrote:
> >>>>
> >>>> Hi all,
> >>>>
> >>>> I'm trying to build clang on Ubuntu 17.10 - the build succeeds, but
> >>>> testing fails:
> >>>>
> >>>> ~/wk/LLVM/build_release$ svn info ../llvm/
> >>>> Path: /home/csabaraduly/wk/LLVM/llvm
> >>>> Working Copy Root Path: /home/csabaraduly/wk/LLVM/llvm
> >>>> URL: https://llvm.org/svn/llvm-project/llvm/trunk
> >>>> Relative URL: ^/llvm/trunk
> >>>> Repository Root: https://llvm.org/svn/llvm-project
> >>>> Repository UUID: 91177308-0d34-0410-b5e6-96231b3b80d8
> >>>> Revision: 319018
> >>>> Node Kind: directory
> >>>> Schedule: normal
> >>>> Last Changed Author: mkazantsev
> >>>> Last Changed Rev: 319018
> >>>> Last Changed Date: 2017-11-27 12:20:58 +0100 (Mon, 27 Nov 2017)
> >>>>
> >>>> ~/wk/LLVM/build_release$ ninja -v all check-all
> >>>> [1/4] cd ~/wk/LLVM/build_release/utils/lit && /usr/bin/cmake -E
> >>>> remove_directory ~/wk/LLVM/build_release/utils/lit/tests &&
> >>>> /usr/bin/cmake -E copy_directory ~/wk/LLVM/llvm/utils/lit/tests
> >>>> ~/wk/LLVM/build_release/utils/lit/tests && /usr/bin/cmake -E copy
> >>>> ~/wk/LLVM/build_release/utils/lit/lit.site.cfg
> >>>> ~/wk/LLVM/build_release/utils/lit/tests
> >>>> [2/4] cd ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go && env
> >>>> "CC=/usr/bin/cc " IN_TMPDIR=1 SILENT=1
> >>>> ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go/buildgo.sh
> >>>> FAILED: projects/compiler-rt/lib/tsan/CMakeFiles/GotsanRuntimeCheck
> >>>> cd ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go && env
> >>>> "CC=/usr/bin/cc " IN_TMPDIR=1 SILENT=1
> >>>> ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go/buildgo.sh
> >>>> [3/4] cd ~/wk/LLVM/build_release/projects/compiler-rt/lib && env
> >>>> LLVM_CHECKOUT=~/wk/LLVM/llvm SILENT=1 TMPDIR=
> >>>> PYTHON_EXECUTABLE=/usr/bin/python2.7
> >>>> COMPILER_RT=~/wk/LLVM/llvm/projects/compiler-rt
> >>>>
> >>>> ~/wk/LLVM/llvm/projects/compiler-rt/lib/sanitizer_common/
> scripts/check_lint.sh
> >>>> ninja: build stopped: subcommand failed.
> >>>>
> >>>> Even ninja -v resulted in SILENT=1 being passed to buildgo.sh, so I
> >>>> tried to run it manually:
> >>>>
> >>>> ~/wk/LLVM/build_release$ pushd
> >>>> ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go && env
> "CC=/usr/bin/cc
> >>>> " IN_TMPDIR=1 SILENT=0
> >>>> ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go/buildgo.sh
> >>>> ~/wk/LLVM/llvm/projects/compiler-rt/lib/tsan/go
> ~/wk/LLVM/build_release
> >>>> /usr/bin/cc gotsan.cc -c -o
> >>>> /tmp/gotsan.vYTnyXdSJU/race_linux_amd64.syso -I../rtl -I../..
> >>>> -I../../sanitizer_common -I../../../include -std=c++11 -m64 -Wall
> >>>> -fno-exceptions -fno-rtti -DSANITIZER_GO=1
> >>>> -DSANITIZER_DEADLOCK_DETECTOR_VERSION=2 -fPIC -ffreestanding
> >>>> -Wno-maybe-uninitialized -Wno-unused-const-variable -Werror
> >>>> -Wno-unknown-warning-option -DSANITIZER_DEBUG=0 -O3 -msse3
> >>>> -fomit-frame-pointer
> >>>> ==12640==ERROR: ThreadSanitizer failed to allocate 0x4000 (16384)
> >>>> bytes at address 1764aec780000 (errno: 12)
> >>>> Segmentation fault (core dumped)
> >>>>
> >>>> ~/wk/LLVM/build_release$ uname -a
> >>>> Linux 4.13.0-17-generic #20-Ubuntu SMP Mon Nov 6 10:04:08 UTC 2017
> >>>> x86_64 x86_64 x86_64 GNU/Linux
> >>>>
> >>>> ~/wk/LLVM/build_release$ /usr/bin/cc -v
> >>>> Using built-in specs.
> >>>> COLLECT_GCC=/usr/bin/cc
> >>>> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
> >>>> OFFLOAD_TARGET_NAMES=nvptx-none
> >>>> OFFLOAD_TARGET_DEFAULT=1
> >>>> Target: x86_64-linux-gnu
> >>>> Configured with: ../src/configure -v --with-pkgversion='Ubuntu
> >>>> 7.2.0-8ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
> >>>> --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++
> >>>> --prefix=/usr --with-gcc-major-version-only --program-suffix=-7
> >>>> --program-prefix=x86_64-linux-gnu- --enable-shared
> >>>> --enable-linker-build-id --libexecdir=/usr/lib
> >>>> --without-included-gettext --enable-threads=posix --libdir=/usr/lib
> >>>> --enable-nls --with-sysroot=/ --enable-clocale=gnu
> >>>> --enable-libstdcxx-debug --enable-libstdcxx-time=yes
> >>>> --with-default-libstdcxx-abi=new --enable-gnu-unique-object
> >>>> --disable-vtable-verify --enable-libmpx --enable-plugin
> >>>> --enable-default-pie --with-system-zlib --with-target-system-zlib
> >>>> --enable-objc-gc=auto --enable-multiarch --disable-werror
> >>>> --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
> >>>> --enable-multilib --with-tune=generic
> >>>> --enable-offload-targets=nvptx-none --without-cuda-driver
> >>>> --enable-checking=release --build=x86_64-linux-gnu
> >>>> --host=x86_64-linux-gnu --target=x86_64-linux-gnu
> >>>> Thread model: posix
> >>>> gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3)
> >>>>
> >>>> Is there a way to disable Go, or at least its tsan checks?
> >>
> >>
> >> Hi,
> >>
> >> Comments out buildgo.sh invocation from build scripts? Or you want
> >> something else?
> >
> >
> >
> > --
> > GCS a+ e++ d- C++ ULS$ L+$ !E- W++ P+++$ w++$ tv+ b++ DI D++ 5++
> > The Tao of math: The numbers you can count are not the real numbers.
> > Life is complex, with real and imaginary parts.
> > "Ok, it boots. Which means it must be bug-free and perfect. " -- Linus
> Torvalds
> > "People disagree with me. I just ignore them." -- Linus Torvalds
> _______________________________________________
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