1 package compiler.c2.aarch64;

     2 

     3 import java.lang.reflect.Field;

     4 import jdk.internal.misc.Unsafe;

     5 

     6 class TestUnsafeVolatileLoad

     7 {

     8     public volatile int f_int = 0;

     9     public volatile Integer f_obj = Integer.valueOf(0);

    10 

    11     public static Unsafe unsafe = Unsafe.getUnsafe();

    12     public static Field f_int_field;

    13     public static Field f_obj_field;

    14     public static long f_int_off;

    15     public static long f_obj_off;

    16 

    17     static {

    18         try {

    19             f_int_field = TestUnsafeVolatileLoad.class.getField("f_int");

    20             f_obj_field = TestUnsafeVolatileLoad.class.getField("f_obj");

    21             f_int_off = unsafe.objectFieldOffset(f_int_field);

    22             f_obj_off = unsafe.objectFieldOffset(f_obj_field);

    23         } catch (Exception e) {

    24             System.out.println("reflection failed " + e);

    25             e.printStackTrace();

    26         }

    27     }

    28 

    29     public static void main(String[] args)

    30     {

    31         final TestUnsafeVolatileLoad t = new TestUnsafeVolatileLoad();

    32         for (int i = 0; i < 100_000; i++) {

    33             t.f_int = i;

    34             int r = t.testInt();

    35             if (r != i) {

    36                 throw new RuntimeException("bad result!");

    37             }

    38         }

    39         for (int i = 0; i < 100_000; i++) {

    40             t.f_obj = Integer.valueOf(i);

    41             int r = t.testObj();

    42             if (r != i) {

    43                 throw new RuntimeException("bad result!");

    44             }

    45         }

    46     }

    47     public int testInt()

    48     {

    49         return unsafe.getIntVolatile(this, f_int_off);

    50     }

    51 

    52     public int testObj()

    53     {

    54         return ((Integer)unsafe.getObjectVolatile(this, f_obj_off));

    55     }

    56 }