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43 lines
948 B
43 lines
948 B
8 years ago
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/*
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* Copyright (c) 2017 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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import javax.annotation.concurrent.ThreadSafe;
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// Test may_alias treatment of arrays
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// two arrays of types in a subtype relation may alias, and race
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@ThreadSafe
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class Parent {}
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@ThreadSafe
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class Child extends Parent {}
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@ThreadSafe
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class SubArr {
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Child[] childArr = new Child[5];
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Parent[] parentArr = childArr; // actual aliasing not required, but for documentation
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String[] strArr = new String[5];
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public Child RWrace() {
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synchronized(this) {
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parentArr[3] = null;
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}
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return childArr[4];
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}
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public String NOrace() {
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synchronized(this) {
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parentArr[3] = null;
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}
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return strArr[2];
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}
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}
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