[compiler-rt] [compiler-rt] Also consider SIGPROF as a synchronous signal (PR #85188)

[Dmitry Vyukov via llvm-commits]

dvyukov wrote:

> Oh, do you mean that they need to be inserted by the program that's calling the syscall

Yes, unfortunately, in the program code. Currently sanitizers don't have any other means to intercept syscalls.
(there were some discussions re using some special kernel hooks or seccomp, but it never materialized)

https://github.com/llvm/llvm-project/pull/85188