57 lines
1.6 KiB
Java
57 lines
1.6 KiB
Java
package compiler.c2.aarch64;
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import java.lang.reflect.Field;
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import jdk.internal.misc.Unsafe;
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class TestUnsafeVolatileLoad
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{
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public volatile int f_int = 0;
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public volatile Integer f_obj = Integer.valueOf(0);
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public static Unsafe unsafe = Unsafe.getUnsafe();
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public static Field f_int_field;
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public static Field f_obj_field;
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public static long f_int_off;
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public static long f_obj_off;
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static {
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try {
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f_int_field = TestUnsafeVolatileLoad.class.getField("f_int");
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f_obj_field = TestUnsafeVolatileLoad.class.getField("f_obj");
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f_int_off = unsafe.objectFieldOffset(f_int_field);
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f_obj_off = unsafe.objectFieldOffset(f_obj_field);
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} catch (Exception e) {
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System.out.println("reflection failed " + e);
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e.printStackTrace();
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}
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}
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public static void main(String[] args)
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{
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final TestUnsafeVolatileLoad t = new TestUnsafeVolatileLoad();
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for (int i = 0; i < 100_000; i++) {
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t.f_int = i;
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int r = t.testInt();
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if (r != i) {
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throw new RuntimeException("bad result!");
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}
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}
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for (int i = 0; i < 100_000; i++) {
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t.f_obj = Integer.valueOf(i);
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int r = t.testObj();
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if (r != i) {
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throw new RuntimeException("bad result!");
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}
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}
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}
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public int testInt()
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{
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return unsafe.getIntVolatile(this, f_int_off);
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}
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public int testObj()
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{
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return ((Integer)unsafe.getReferenceVolatile(this, f_obj_off));
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}
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}
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