86 lines
2.6 KiB
Java
86 lines
2.6 KiB
Java
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* Unit tests for JVMTI OBJECT_FREE event
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*
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* WARNING: This test makes the assumption that System.gc() will free some
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* objects used in test. This is not a good assumption. Please mail if you
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* can think of a better way to test this event.
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*
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*/
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package nsk.jvmti.unit.heap;
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import nsk.share.jvmti.unit.*;
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import java.io.PrintStream;
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public class ObjectFreeTests {
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final static int JCK_STATUS_BASE = 95;
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final static int PASSED = 0;
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final static int FAILED = 2;
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public static void main(String args[]) {
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args = nsk.share.jvmti.JVMTITest.commonInit(args);
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// produce JCK-like exit status.
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System.exit(run(args, System.out) + JCK_STATUS_BASE);
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}
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public static int run(String args[], PrintStream out) {
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/*
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* Tag 50,000 objects, do a free GCs, and hope that we get 50,000
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* OBJECT_FREE events
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*/
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Heap.setObjectFreeCallback();
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int count = 50*1000;
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for (int i=0; i<count; i++) {
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Heap.setTag(new Object(), 100);
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}
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// do a few GCs - hopefully objects will be GC'ed
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for (int i=0; i<5; i++) {
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System.gc();
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}
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int freed = Heap.getObjectFreeCount();
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System.out.println("Number of object free events: " + freed +
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", expected: " + count);
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if (freed > count) {
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throw new RuntimeException("More events than objects");
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}
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if (freed < count) {
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System.err.println("WARNING: less than expected!!!");
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}
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return PASSED;
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}
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}
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