llvm /
openmp /
37c72127e90360a020f351f18d9cccfc30e5145a Merging r317115:
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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
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git-svn-id: https://llvm.org/svn/llvm-project/openmp/branches/release_50@318178 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed
