[compiler-rt] [HWASAN]Implement memcmp interceptor in HWASAN (PR #67204)

[Thurston Dang via llvm-commits]

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@@ -66,7 +66,7 @@
 #define SANITIZER_INTERCEPT_MEMCPY 0
 
 #undef SANITIZER_INTERCEPT_MEMCMP
-#define SANITIZER_INTERCEPT_MEMCMP 0
+#define SANITIZER_INTERCEPT_MEMCMP 1
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thurstond wrote:

Please note the comments at the top of the file:
- don't forcibly #define as 1 because it prevents interception being defined elsewhere as conditional (e.g., Fuchsia really doesn't like interceptors)
- corollary: comment out the #define as 0 (instead of deleting it) as a placeholder

https://github.com/llvm/llvm-project/pull/67204