#if !SANITIZER_GO
#if defined(__x86_64__)
+#define HAS_48_BIT_ADDRESS_SPACE 1
+#elif SANITIZER_IOSSIM // arm64 iOS simulators (order of #if matters)
+#define HAS_48_BIT_ADDRESS_SPACE 1
+#elif SANITIZER_IOS // arm64 iOS devices (order of #if matters)
+#define HAS_48_BIT_ADDRESS_SPACE 0
+#elif SANITIZER_MAC // arm64 macOS (order of #if matters)
+#define HAS_48_BIT_ADDRESS_SPACE 1
+#else
+#define HAS_48_BIT_ADDRESS_SPACE 0
+#endif
+
+#if HAS_48_BIT_ADDRESS_SPACE
/*
C/C++ on linux/x86_64 and freebsd/x86_64
0000 0000 1000 - 0080 0000 0000: main binary and/or MAP_32BIT mappings (512GB)
static const uptr kVdsoBeg = 0x7000000000000000ull;
};
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) && !defined(__APPLE__)
// AArch64 supports multiple VMA which leads to multiple address transformation
// functions. To support these multiple VMAS transformations and mappings TSAN
// runtime for AArch64 uses an external memory read (vmaSize) to select which
#define TSAN_RUNTIME_VMA 1
#endif
-#elif SANITIZER_GO && !SANITIZER_WINDOWS && defined(__x86_64__)
+#elif SANITIZER_GO && !SANITIZER_WINDOWS && HAS_48_BIT_ADDRESS_SPACE
/* Go on linux, darwin and freebsd on x86_64
0000 0000 1000 - 0000 1000 0000: executable
#endif
void InitializePlatformEarly() {
-#if !SANITIZER_GO && defined(__aarch64__)
+#if !SANITIZER_GO && !HAS_48_BIT_ADDRESS_SPACE
uptr max_vm = GetMaxUserVirtualAddress() + 1;
if (max_vm != Mapping::kHiAppMemEnd) {
Printf("ThreadSanitizer: unsupported vm address limit %p, expected %p.\n",
Die();
}
-#if defined(__aarch64__) && defined(__APPLE__)
+#if defined(__aarch64__) && !HAS_48_BIT_ADDRESS_SPACE
ProtectRange(HeapMemEnd(), ShadowBeg());
ProtectRange(ShadowEnd(), MetaShadowBeg());
ProtectRange(MetaShadowEnd(), TraceMemBeg());