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Author SHA1 Message Date
Artem Dergachev a21df23fd8 [analyzer] MacOSXAPIChecker: Improve warnings for __block vars in dispatch_once. 
The checker already warns for __block-storage variables being used as a
dispatch_once() predicate, however it refers to them as local which is not quite
accurate, so we fix that.

Differential Revision: https://reviews.llvm.org/D26159

llvm-svn: 285637
 2016-10-31 21:04:54 +00:00
Artem Dergachev aacc03c918 [analyzer] MacOSXAPIChecker: Disallow dispatch_once_t in ivars and heap. 
Unlike global/static variables, calloc etc. functions that allocate ObjC
objects behave differently in terms of memory barriers, and hacks that make
dispatch_once as fast as it possibly could be start failing.

Differential Revision: https://reviews.llvm.org/D25909

llvm-svn: 285605
 2016-10-31 17:27:26 +00:00