[llvm-dev] Some ASan and TSan tests go into an infinite loop on Debian/sid x86_64

[Dmitri Gribenko via llvm-dev]

Hi,

I was just building the top-of-trunk of LLVM/Clang/compiler-rt on
Debian/sid x86_64 (with gcc (Debian 5.3.1-7) 5.3.1 20160121) and for
me Asan-x86_64-inline-Test/AddressSanitizer.ManyThreadsTest does not
finish running:

Note: Google Test filter = AddressSanitizer.ManyThreadsTest
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from AddressSanitizer
[ RUN      ] AddressSanitizer.ManyThreadsTest
<just keeps going for minutes>

Same for 'ThreadSanitizer :: mmap_stress.cc', but it doesn't produce any output.

The tests seem to be multithreaded, so I want to mention that this is
an 18-core VM.  Maybe the tests are not scaling well?

Is this a known issue?

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/