Kuba Brecka b79932addf [asan] Fix the freopen interceptor to allow NULL instead of a filename
According to `man freopen`, passing NULL instead of a filename is valid, however the current implementation of the interceptor assumes this parameter is non-NULL. Let's fix that and add a test case.

Differential Revision: http://reviews.llvm.org/D11389

llvm-svn: 246435
2015-08-31 12:41:55 +00:00
..