[compiler-rt] [sanitizer] Add cloak_sanitizer_signal_handlers runtime option (PR #162746)

[Thurston Dang via llvm-commits]

================
@@ -111,6 +114,18 @@ const char *StripModuleName(const char *module) {
   return module;
 }
 
+void SetSignalHandlerFromSanitizer(int signum, bool new_state) {
+  if (signum >= 0 && signum < MaxSignals)
+    signal_handler_is_from_sanitizer[signum] = new_state;
----------------
thurstond wrote:

This function is used in the interceptors, which are cross-platform. If I moved SetSignalHandlerFromSanitizer into sanitizer_posix_libcdep.cpp (the same file as MaybeInstallSigaction), I would need to add a lot of `#if SANITIZER_POSIX` into the interceptors.

https://github.com/llvm/llvm-project/pull/162746