37     static final Unsafe UNSAFE = Unsafe.getUnsafe();
  38 
  39     static final long F_OFFSET;
  40 
  41     static {
  42         try {
  43             F_OFFSET = UNSAFE.objectFieldOffset(T.class.getDeclaredField("f"));
  44         } catch (Exception e) {
  45             throw new Error(e);
  46         }
  47     }
  48 
  49     static class T {
  50         Object f;
  51     }
  52 
  53     public static void testFieldInstanceObject(Object t) {
  54         for (int c = 0; c < 20000; c++) { // trigger OSR compilation
  55             // java/lang/Object+12 *
  56             // _base = InstPtr, _ptr = BotPTR, _field = NULL, mismatched = true
  57             UNSAFE.putObject(t, F_OFFSET, "foo");
  58         }
  59     }
  60 
  61     public static void testFieldInstanceT(T t) {
  62         for (int c = 0; c < 20000; c++) { // trigger OSR compilation
  63             // ...$T+12 *
  64             // _base = InstPtr, _ptr = BotPTR, _field = T.f, mismatched = false
  65             UNSAFE.putObject(t, F_OFFSET, "foo");
  66         }
  67     }
  68     public static void main(String[] args) {
  69         testFieldInstanceObject(new T());
  70         testFieldInstanceT(new T());
  71     }
  72 }
  73 

  37     static final Unsafe UNSAFE = Unsafe.getUnsafe();
  38 
  39     static final long F_OFFSET;
  40 
  41     static {
  42         try {
  43             F_OFFSET = UNSAFE.objectFieldOffset(T.class.getDeclaredField("f"));
  44         } catch (Exception e) {
  45             throw new Error(e);
  46         }
  47     }
  48 
  49     static class T {
  50         Object f;
  51     }
  52 
  53     public static void testFieldInstanceObject(Object t) {
  54         for (int c = 0; c < 20000; c++) { // trigger OSR compilation
  55             // java/lang/Object+12 *
  56             // _base = InstPtr, _ptr = BotPTR, _field = NULL, mismatched = true
  57             UNSAFE.putReference(t, F_OFFSET, "foo");
  58         }
  59     }
  60 
  61     public static void testFieldInstanceT(T t) {
  62         for (int c = 0; c < 20000; c++) { // trigger OSR compilation
  63             // ...$T+12 *
  64             // _base = InstPtr, _ptr = BotPTR, _field = T.f, mismatched = false
  65             UNSAFE.putReference(t, F_OFFSET, "foo");
  66         }
  67     }
  68     public static void main(String[] args) {
  69         testFieldInstanceObject(new T());
  70         testFieldInstanceT(new T());
  71     }
  72 }
  73