[compiler-rt] [ASan][Windows] Synchronizing ASAN init on Windows (PR #71833)

[Vitaly Buka via llvm-commits]

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@@ -71,16 +71,54 @@ static void CheckUnwind() {
 }
 
 // -------------------------- Globals --------------------- {{{1
-static int asan_inited = 0;
-static int asan_init_is_running = 0;
+#if SANITIZER_WINDOWS
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vitalybuka wrote:

do we need to #if ?
maybe atomic everywhere?

https://github.com/llvm/llvm-project/pull/71833