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

[Vitaly Buka via llvm-commits]

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@@ -24,6 +24,9 @@ namespace __sanitizer {
 
 const char *SanitizerToolName = "SanitizerTool";
 
+const int MaxSignals = 64;
+bool signal_handler_is_from_sanitizer[MaxSignals] = {0};
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vitalybuka wrote:

I don't see any locking, so should be atomic

SetSignalHandlerFromSanitizer/IsSignalHandlerFromSanitizer
should be just atomic SetSignalHandlerFromSanitizer which returns previos value

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