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authorJonathan Peyton <jonathan.l.peyton@intel.com>2017-11-01 19:44:42 +0000
committerJonathan Peyton <jonathan.l.peyton@intel.com>2017-11-01 19:44:42 +0000
commit3d18a37ca9bbbbd9f785d648a1fc602f07d5c6d1 (patch)
tree86cc4441f5311826689e7fbe5488fc1aaed8fa92 /lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h
parent435151ad753d6a76ef09af3803c510a1bcf9fde9 (diff)
downloadbcm5719-llvm-3d18a37ca9bbbbd9f785d648a1fc602f07d5c6d1.tar.gz
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[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 llvm-svn: 317115
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