[llvm] r193463 - lit: handle late multiprocessing errors gracefully

[Sylvestre Ledru]

Hello,

On 26/10/2013 10:22, Alp Toker wrote:
> Author: alp
> Date: Sat Oct 26 03:22:44 2013
> New Revision: 193463
>
> URL: http://llvm.org/viewvc/llvm-project?rev=193463&view=rev
> Log:
> lit: handle late multiprocessing errors gracefully
>
> This should be a better fix for lit multiprocessing failures, replacing the
> OpenBSD and FreeBSD workarounds in r193413 and r193457.
>
This commit broke the code coverage of LLVM [1] (runs under Debian
GNU/Linux unstable amd64)
The testsuite cannot be run with Python 2.7. It fail with:

-- Testing: 6715 tests, 8 threads --
Traceback (most recent call last):
  File "/tmp/buildd/llvm-toolchain-snapshot-3.4~svn193508/utils/lit/lit.py", line 5, in <module>
    lit.main()
  File "/tmp/buildd/llvm-toolchain-snapshot-3.4~svn193508/utils/lit/lit/main.py", line 327, in main
    opts.useProcesses)
  File "/tmp/buildd/llvm-toolchain-snapshot-3.4~svn193508/utils/lit/lit/run.py", line 217, in execute_tests
    canceled_flag =  multiprocessing.Value('i', 0)
  File "/usr/lib/python2.7/multiprocessing/__init__.py", line 253, in Value
    return Value(typecode_or_type, *args, **kwds)
  File "/usr/lib/python2.7/multiprocessing/sharedctypes.py", line 103, in Value
    lock = RLock()
  File "/usr/lib/python2.7/multiprocessing/__init__.py", line 183, in RLock
    return RLock()
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 172, in __init__
    SemLock.__init__(self, RECURSIVE_MUTEX, 1, 1)
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 75, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)
OSError: [Errno 38] Function not implemented
make[3]: *** [all] Error 1
See [2] for the full log

Could you fix that ?

Thanks,
Sylvestre

[1] http://buildd-clang.debian.net/coverage/
[2]
http://llvm-jenkins.debian.net/job/llvm-toolchain-codecoverage-binaries/architecture=amd64,distribution=unstable/384/consoleFull