[openmp] [test] Skip omp_taskwait test on NetBSD

[mgorny]

Summary

The omp_taskwait test is known to trigger a bug in NetBSD kernel,
and effectively is capable of hanging the host running it. Disable
it until we can resolve it.

[jdoerfert]

I don't object to the patch. Before you commit though, could you open a bug report and link it in the commit message and comment, please.

[mgorny]

Filed https://bugs.llvm.org/show_bug.cgi?id=42020 but I need to investigate more.

[jdoerfert]

Bug filed, thanks!
If this helps to unblock the build, LGTM.

[mgorny]

Thanks. I'd like to monitor the situation for a while more before committing this. I'll probably have to disable omp_taskloop_num_tasks as well.

[mgorny]

I've committed it as rL361825 but forgot to include the revision.

openmp/runtime/test/lit.cfg

if config.libomp_omp_version >= 45:
     config.available_features.add("openmp-4.5")
 
 if config.libomp_omp_version >= 40:
     config.available_features.add("openmp-4.0")
 
 if 'Linux' in config.operating_system:
     config.available_features.add("linux")
 
+if config.operating_system == 'NetBSD':
+    config.available_features.add("netbsd")
+
 if config.operating_system in ['Linux', 'Windows']:
     config.available_features.add('affinity')
 
 # to run with icc INTEL_LICENSE_FILE must be set
 if 'INTEL_LICENSE_FILE' in os.environ:
     config.environment['INTEL_LICENSE_FILE'] = os.environ['INTEL_LICENSE_FILE']
 
 

openmp/runtime/test/tasking/omp_taskwait.c

+// This test is known to be fragile on NetBSD kernel at the moment.
+// UNSUPPORTED: netbsd
 // RUN: %libomp-compile-and-run
 #include <stdio.h>
 #include <math.h>
 #include "omp_testsuite.h"
 #include "omp_my_sleep.h"
 
 int test_omp_taskwait()
 {