[clang] [compiler-rt] Rtsan fbsd (PR #125389)

[Chris Apple via cfe-commits]

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@@ -43,6 +44,21 @@ static __rtsan::Context &GetContextForThisThreadImpl() {
 
   return *current_thread_context;
 }
+#else
+
+// On FreeBSD, pthread api cannot be used as calloc is called under the hood
+// at library initialization time.
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cjappl wrote:

Can you elaborate on what you're seeing here? Can we not just disable rtsan for this call during init or use the internal allocator (see the early outs in malloc interceptor etc)

https://github.com/llvm/llvm-project/pull/125389