[PATCH] D53528: [sanitizer] Avoid calling a nullptr in MonotonicNanoTime if interceptors are not yet initialized

[Kostya Kortchinsky via Phabricator via llvm-commits]

cryptoad added a comment.

In https://reviews.llvm.org/D53528#1272592, @kubamracek wrote:

> The problem I'm seeing is when real_clock_gettime does exist, but it's not yet initialized, see the backtrace posted earlier. I'm not sure how performance sensitive this area is: Is it used elsewhere other than the memory allocator?


MonotonicNanoTime is hot for Scudo (which is performance sensitive), which is the reason for the ugly vDSO check. But yeah that should work.


https://reviews.llvm.org/D53528