test/jdk/java/lang/instrument/GetObjectSizeIntrinsicsTest.java

@@ -311,10 +311,13 @@
  
      // These should overflow 4G size boundary
      static final int LARGE_INT_ARRAY_SIZE = 1024*1024*1024 + 1024;
      static final int LARGE_OBJ_ARRAY_SIZE = (4096/(int)REF_SIZE)*1024*1024 + 1024;
  
+     static final boolean COMPACT_HEADERS = WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompactObjectHeaders");
+     static final int HEADER_SIZE = COMPACT_HEADERS ? 8 : (Platform.is64bit() ? 16 : 8);
+ 
      final String mode;
  
      public GetObjectSizeIntrinsicsTest(String name, String mode) {
          super(name);
          this.mode = mode;

@@ -370,28 +373,28 @@
      private static long roundUp(long v, long a) {
          return (v + a - 1) / a * a;
      }
  
      private void testSize_newObject() {
-         long expected = roundUp(Platform.is64bit() ? 16 : 8, OBJ_ALIGN);
+         long expected = roundUp(HEADER_SIZE, OBJ_ALIGN);
          for (int c = 0; c < ITERS; c++) {
              assertEquals(expected, fInst.getObjectSize(new Object()));
          }
      }
  
      private void testSize_localObject() {
-         long expected = roundUp(Platform.is64bit() ? 16 : 8, OBJ_ALIGN);
+         long expected = roundUp(HEADER_SIZE, OBJ_ALIGN);
          Object o = new Object();
          for (int c = 0; c < ITERS; c++) {
              assertEquals(expected, fInst.getObjectSize(o));
          }
      }
  
      static Object staticO = new Object();
  
      private void testSize_fieldObject() {
-         long expected = roundUp(Platform.is64bit() ? 16 : 8, OBJ_ALIGN);
+         long expected = roundUp(HEADER_SIZE, OBJ_ALIGN);
          for (int c = 0; c < ITERS; c++) {
              assertEquals(expected, fInst.getObjectSize(staticO));
          }
      }