[llvm-dev] Hang generating sanitizer tests

[Dean Michael Berris via llvm-dev]

> On 31 May 2018, at 06:19, via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> When I run "make check-all" with ToT I am seeing what looks like a hang
> generating sanitizer tests:
> 
> [...]
> [100%] Generating dynamic/Asan-x86_64-calls-Dynamic-Test
> make[3]: Leaving directory '/build/debug'
> [100%] Built target TAsan-x86_64-calls-Dynamic-Test
> [100%] Generating default/Asan-x86_64-inline-Test
> make[3]: Leaving directory '/build/debug'
> [100%] Built target TAsan-x86_64-inline-Test
> [100%] Generating dynamic/Asan-x86_64-inline-Dynamic-Test
> make[3]: Leaving directory '/build/debug'
> [100%] Built target TAsan-x86_64-inline-Dynamic-Test
> make[3]: Entering directory '/build/debug'
> Scanning dependencies of target AsanDynamicUnitTests
> make[3]: Leaving directory '/build/debug'
> [100%] Built target AsanDynamicUnitTests
> [100%] Generating Sanitizer-x86_64-Test
> make[3]: Leaving directory '/build/debug'
> [100%] Built target TSanitizer-x86_64-Test
> make[3]: Entering directory '/build/debug'
> Scanning dependencies of target SanitizerUnitTests
> make[3]: Leaving directory '/build/debug'
> [100%] Built target SanitizerUnitTests
> 
> It seems hung up in lld linking Asan-x86_64-calls-Test among other
> things.  It has been happening for at least a week and source updates
> haven't changed the situation.  An strace reveals:
> 
> Process 408631 attached
> futex(0x7ffdae5c7144, FUTEX_WAIT_PRIVATE, 1, NULL
> 
> It's been sitting there for hours, waiting on a mutex.  Rebuilds result
> in the same behavior Has anyone else seen this?  Any tips to get things
> going?
> 

Can you say:

- What platform/OS you’re doing this on?
- What your CMake configuration looks like (i.e. how you invoked cmake)
- Are you building this stand-alone or in-tree?
- Did you build lld or is that an lld that you got somewhere else?

That would be helpful.

-- Dean