Tom Stellard
37c72127e9
------------------------------------------------------------------------ r317115 | jlpeyton | 2017-11-01 12:44:42 -0700 (Wed, 01 Nov 2017) | 19 lines [OpenMP] Fix race condition in omp_init_lock This is a partial fix for bug 34050. This prevents callers of omp_set_lock (which does not hold __kmp_global_lock) from ever seeing an uninitialized version of __kmp_i_lock_table.table. It does not solve a use-after-free race condition if omp_set_lock obtains a pointer to __kmp_i_lock_table.table before it is updated and then attempts to dereference afterwards. That race is far less likely and can be handled in a separate patch. The unit test usually segfaults on the current trunk revision. It passes with the patch. Patch by Adam Azarchs Differential Revision: https://reviews.llvm.org/D39439 ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/openmp/branches/release_50@318178 91177308-0d34-0410-b5e6-96231b3b80d8