llvm dev - May 2018 - Hang generating sanitizer tests

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?

Thanks!

                          -David

> 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

Just to follow-up, I'm now encountering this as well. I'm doing this on
Linux.

It seems that when linking with the most-recently built clang, the
unit tests are taking a while to complete. It's notably not using more
than 1 thread, and if using `lld` I would have expected the linker to
still be running in parallel.

I'm doing this on a debug build, so that might help narrow it down.
On Thu, May 31, 2018 at 9:32 AM Dean Michael Berris
<dean.berris at gmail.com> wrote:
>
>
>
> > 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
>

-- 
Dean