[HWASan] Use dynamic shadow memory on Android only.

alekseyshl · alekseyshl · commit cf30f6425a66 · 2018-04-24T00:17:02.000Z
There're issues with IFUNC support on other platforms. Differential Revision: https://reviews.llvm.org/D45847 llvm-svn: 330666
diff --git a/compiler-rt/lib/hwasan/hwasan_mapping.h b/compiler-rt/lib/hwasan/hwasan_mapping.h
@@ -53,10 +53,10 @@ static constexpr __sanitizer::u64 kDefaultShadowSentinel = ~(__sanitizer::u64)0;
 constexpr __sanitizer::uptr kShadowScale = 4;
 constexpr __sanitizer::uptr kShadowAlignment = 1ULL << kShadowScale;
 
-#if defined(__x86_64__)
-# define HWASAN_FIXED_MAPPING 1
-#else
+#if SANITIZER_ANDROID
 # define HWASAN_FIXED_MAPPING 0
+#else
+# define HWASAN_FIXED_MAPPING 1
 #endif
 
 #if HWASAN_FIXED_MAPPING
