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Commit 89bcec81 authored by Sergey Matveev's avatar Sergey Matveev
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[sanitizer] Change the way GetThreadStackAndTls() obtains the thread descriptor address. 

Instead of using arch_prctl(ARCH_GET_FS), read the address from the
tread descriptor itself. This lets us avoid sandboxing issues. Also,
GetThreadStackAndTls() can now be implemented on i386.

llvm-svn: 182853
parent 67700314
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