src/java.base/share/classes/java/nio/Bits.java

@@ -565,36 +565,19 @@
     }
 
 
     // -- Processor and memory-system properties --
 
-    private static final ByteOrder byteOrder;
+    private static final ByteOrder byteOrder
+        = unsafe.isBigEndian() ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
 
     static ByteOrder byteOrder() {
         if (byteOrder == null)
             throw new Error("Unknown byte order");
         return byteOrder;
     }
 
-    static {
-        long a = unsafe.allocateMemory(8);
-        try {
-            unsafe.putLong(a, 0x0102030405060708L);
-            byte b = unsafe.getByte(a);
-            switch (b) {
-            case 0x01: byteOrder = ByteOrder.BIG_ENDIAN;     break;
-            case 0x08: byteOrder = ByteOrder.LITTLE_ENDIAN;  break;
-            default:
-                assert false;
-                byteOrder = null;
-            }
-        } finally {
-            unsafe.freeMemory(a);
-        }
-    }
-
-
     private static int pageSize = -1;
 
     static int pageSize() {
         if (pageSize == -1)
             pageSize = unsafe().pageSize();

@@ -609,14 +592,11 @@
     private static boolean unalignedKnown = false;
 
     static boolean unaligned() {
         if (unalignedKnown)
             return unaligned;
-        String arch = AccessController.doPrivileged(
-            new sun.security.action.GetPropertyAction("os.arch"));
-        unaligned = arch.equals("i386") || arch.equals("x86")
-            || arch.equals("amd64") || arch.equals("x86_64");
+        unaligned = unsafe.unalignedAccess();
         unalignedKnown = true;
         return unaligned;
     }