[PATCH] D61337: [hwasan] Fix HWASAN_WITH_INTERCEPTORS=OFF build on not-android.

[Evgenii Stepanov via Phabricator via llvm-commits]

eugenis added a comment.

HWASAN_WITH_INTERCEPTORS=OFF is a mode where we rely on libc to call __hwasan_thread_enter and __hwasan_thread_exit as appropriate. This is particularly important when libc is built with hwasan, because then instrumented code may run on a thread before GetCurrentThread is called. At this moment, only bionic supports this, as far as I know.

These two conditional blocks are independent. The one with HwasanTSDThreadInit implements calling __hwasan_thread_exit in the HWASAN_WITH_INTERCEPTORS=OFF mode. The one with GetCurrentThreadLongPtr defines access to the thread local storage (which is also part of the instrumentation ABI). Android uses the fast fixed slot in either mode.


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  https://reviews.llvm.org/D61337/new/

https://reviews.llvm.org/D61337