[compiler-rt] [rtsan] Add support for ReportErrorSummary (PR #116424)

[Chris Apple via llvm-commits]

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@@ -62,8 +62,12 @@ static void OnViolation(const BufferedStackTrace &stack,
   if (UNLIKELY(is_stack_novel)) {
     IncrementUniqueErrorCount();
 
-    PrintDiagnostics(info);
-    stack.Print();
+    {
+      ScopedErrorReportLock l;
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cjappl wrote:

This scope is now bubbled up here to make sure we don't ever separate any of this reporting across threads, we then just assert the lock has been taken in debug mode later in these methods

https://github.com/llvm/llvm-project/pull/116424