[compiler-rt] [compiler-rt][rtsan] ptrace interception on Linux. (PR #123941)

[via llvm-commits]

davidtrevelyan wrote:

@cjappl i lean towards intercepting - remembering that our users care about real-time-unsafe calls from within dependencies as well as from within their own code. I'd say that we have easy-enough escape hatches for people who really want to escape to make the cost of missing a ptrace enough to outweigh the cost of disabling when you really want it :)

https://github.com/llvm/llvm-project/pull/123941