1 /*
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 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 5  * This code is free software; you can redistribute it and/or modify it
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 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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23 
24 /**
25  * @test
26  * @bug 8381063
27  * @summary Verify that null is passed for jobject parameter to JVMTI SampledObjectAlloc event callbacks.
28  * @requires vm.jvmti
29  *
30  * @enablePreview
31  * @run main/othervm/native -agentlib:SampledObjectAllocValue SampledObjectAllocValue
32  */
33 
34 public class SampledObjectAllocValue {
35 
36     private static value class ValueClass {
37         public long x;
38         public long y;
39 
40         public ValueClass(long arg1, long arg2) {
41           x = arg1; y = arg2;
42         }
43     }
44 
45     private static ValueClass[] tmp = new ValueClass[100];
46 
47     private static native void enableEvents(Thread thread, Class testedClass);
48 
49     public static void main(String[] args) throws Exception {
50         enableEvents(Thread.currentThread(), ValueClass.class);
51         // Allocate value objects to trigger JVMTI SampledObjectAlloc events.
52         // Here we assume that flat array layout is not used for ValueClass objects.
53         for (int i = 0; i < tmp.length; i++) {
54             tmp[i] = new ValueClass(i, i + 100);
55         }
56     }
57 }