1 /*
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 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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23 
24 /**
25  * @test
26  * @summary Sanity tests for GetLocalObject/SetLocalObject/GetLocalInstance with value classes.
27  * @requires vm.jvmti
28  * @modules java.base/jdk.internal.vm.annotation
29  * @enablePreview
30  * @run main/othervm/native -agentlib:ValueGetSetLocal -XX:+EnableValhalla ValueGetSetLocal
31  */
32 
33 import java.util.Objects;
34 import jdk.internal.vm.annotation.LooselyConsistentValue;
35 import jdk.internal.vm.annotation.NullRestricted;
36 
37 public class ValueGetSetLocal {
38 
39     private static final String agentLib = "ValueGetSetLocal";
40 
41     @LooselyConsistentValue
42     private static value class ValueClass {
43         public int f1;
44         public int f2;
45 
46         public ValueClass(int v1, int v2) { f1 = v1; f2 = v2; }
47     }
48 
49     private static value class ValueHolder {
50         public ValueClass f1;
51         @NullRestricted
52         public ValueClass f2;
53 
54         public static ValueClass s1 = new ValueClass(0, 1);
55 
56         public ValueHolder(int v) {
57             f1 = new ValueClass(v, v + 100);
58             f2 = new ValueClass(v + 1, v + 200);
59         }
60 
61         // slot 0 is "this"
62         public void meth(ValueClass obj1,       // slot 1
63                          ValueHolder obj2) {    // slot 2
64             Object obj3 = obj2;                 // slot 3
65             // SetLocalObject can only set locals for top frame of virtual threads.
66             boolean testSetLocal = !Thread.currentThread().isVirtual();
67             if (!nTestLocals(Thread.currentThread(), testSetLocal)) {
68                 throw new RuntimeException("ERROR: nTestLocals failed");
69             }
70             // nTestLocals sets obj3 = obj1
71             if (testSetLocal && !Objects.equals(obj3, obj1)) {
72                 throw new RuntimeException("ERROR: obj3 != obj1" + " (obj3 = " + obj3 + ")");
73             }
74         }
75     }
76 
77     public static void main(String[] args) throws Exception {
78         try {
79             System.loadLibrary(agentLib);
80         } catch (UnsatisfiedLinkError ex) {
81             System.err.println("Failed to load " + agentLib + " lib");
82             System.err.println("java.library.path: " + System.getProperty("java.library.path"));
83             throw ex;
84         }
85 
86         ValueClass testObj1 = new ValueClass(7, 8);
87         ValueHolder testObj2 = new ValueHolder(9);
88         testObj2.meth(testObj1, testObj2);
89     }
90 
91     private static native boolean nTestLocals(Thread thread, boolean testSetLocal);
92 }