[llvm-dev] Go Tsan check failure

[Csaba Raduly via llvm-dev]

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?

Csaba

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