Index: unittests/MachOTests/MachONormalizedFileBinaryReaderTests.cpp
===================================================================
--- unittests/MachOTests/MachONormalizedFileBinaryReaderTests.cpp
+++ unittests/MachOTests/MachONormalizedFileBinaryReaderTests.cpp
@@ -31,9 +31,17 @@
   return std::move(*r);
 }
 
+// The Mach-O object reader uses functions such as read32 or read64
+// which don't allow unaligned access. Our in-memory object file
+// needs to be aligned to a larger offset than uint8_t's.
+#if _MSC_VER
+#define FILEBYTES __declspec(align(64)) const uint8_t fileBytes[]
+#else
+#define FILEBYTES const uint8_t fileBytes[] __attribute__((aligned(64)))
+#endif
 
 TEST(BinaryReaderTest, empty_obj_x86_64) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
       0xcf, 0xfa, 0xed, 0xfe, 0x07, 0x00, 0x00, 0x01,
       0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
       0x01, 0x00, 0x00, 0x00, 0x98, 0x00, 0x00, 0x00,
@@ -69,7 +77,7 @@
 
 
 TEST(BinaryReaderTest, empty_obj_x86) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
       0xce, 0xfa, 0xed, 0xfe, 0x07, 0x00, 0x00, 0x00,
       0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
       0x01, 0x00, 0x00, 0x00, 0x7c, 0x00, 0x00, 0x00,
@@ -101,7 +109,7 @@
 
 
 TEST(BinaryReaderTest, empty_obj_ppc) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
       0xfe, 0xed, 0xfa, 0xce, 0x00, 0x00, 0x00, 0x12,
       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
       0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x7c,
@@ -133,7 +141,7 @@
 
 
 TEST(BinaryReaderTest, empty_obj_armv7) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
       0xce, 0xfa, 0xed, 0xfe, 0x0c, 0x00, 0x00, 0x00,
       0x09, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
       0x01, 0x00, 0x00, 0x00, 0x7c, 0x00, 0x00, 0x00,
@@ -164,7 +172,7 @@
 }
 
 TEST(BinaryReaderTest, empty_obj_x86_64_arm7) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
 #include "empty_obj_x86_armv7.txt"
   };
   std::unique_ptr<NormalizedFile> f =
@@ -187,7 +195,7 @@
 }
 
 TEST(BinaryReaderTest, hello_obj_x86_64) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
     0xCF, 0xFA, 0xED, 0xFE, 0x07, 0x00, 0x00, 0x01,
     0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
     0x03, 0x00, 0x00, 0x00, 0x50, 0x01, 0x00, 0x00,
@@ -320,7 +328,7 @@
 
 
 TEST(BinaryReaderTest, hello_obj_x86) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
     0xCE, 0xFA, 0xED, 0xFE, 0x07, 0x00, 0x00, 0x00,
     0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
     0x03, 0x00, 0x00, 0x00, 0x28, 0x01, 0x00, 0x00,
@@ -452,7 +460,7 @@
 
 
 TEST(BinaryReaderTest, hello_obj_armv7) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
     0xCE, 0xFA, 0xED, 0xFE, 0x0C, 0x00, 0x00, 0x00,
     0x09, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
     0x03, 0x00, 0x00, 0x00, 0x28, 0x01, 0x00, 0x00,
@@ -594,7 +602,7 @@
 
 
 TEST(BinaryReaderTest, hello_obj_ppc) {
-  const uint8_t fileBytes[] = {
+  FILEBYTES = {
     0xFE, 0xED, 0xFA, 0xCE, 0x00, 0x00, 0x00, 0x12,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
     0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x01, 0x28,
@@ -738,4 +746,3 @@
   writeBinary(*f, "/tmp/foo.o");
 
 }
-