[compiler-rt] [asan] Implement interception on AIX (PR #131870)

[Hubert Tong via llvm-commits]

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@@ -56,8 +56,18 @@ namespace __asan {
 #  define ASAN_READ_STRING(ctx, s, n) \
     ASAN_READ_STRING_OF_LEN((ctx), (s), internal_strlen(s), (n))
 
-static inline uptr MaybeRealStrnlen(const char *s, uptr maxlen) {
-#if SANITIZER_INTERCEPT_STRNLEN
+static inline void internal_or_real_memcpy(void* new_mem, const char* s,
+                                           uptr length) {
+#  if SANITIZER_INTERCEPT_MEMCPY
+  REAL(memcpy)(new_mem, s, length + 1);
+#  else
+  internal_memcpy(new_mem, s, length + 1);
+#  endif
+}
+
+[[maybe_unused]] static inline uptr MaybeRealStrnlen(const char* s,
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hubert-reinterpretcast wrote:

What is the reason for the addition of `[[maybe_unused]]` here as part of this PR?

https://github.com/llvm/llvm-project/pull/131870