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/*
* Copyright (c) 2021, Alibaba Group Holding Limited. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8278125
* @summary Test if OOME has proper stacktrace
* @library /test/lib
* @run main/othervm -Xmx100m -Xms100m GenOutOfMemoryError
*/
import jdk.test.lib.Asserts;
public class GenOutOfMemoryError {
private static int OOME_HAS_STACK_CNT = 0;
private void badMethod(int n){
try {
System.out.format("bad method was invoked %n", n);
// Try to allocate an array the same size as the heap - it will throw OOME without
// actually consuming available memory.
Integer[] array = new Integer[1000 * 1000 * 100];
array.hashCode();
} catch (Throwable t){
StackTraceElement[] traces = t.getStackTrace();
if (traces.length != 0) {
OOME_HAS_STACK_CNT++;
}
t.printStackTrace();
}
}
public static void main(String[] args) {
GenOutOfMemoryError genOutOfMemoryError = new GenOutOfMemoryError();
for (int i = 0; i < 7; i++) {
genOutOfMemoryError.badMethod(i + 1);
}
Asserts.assertTrue(4/*PreallocatedOutOfMemoryErrorCount defaults to 4*/ == OOME_HAS_STACK_CNT, "Some OOMEs do not have stacktraces");
}
}
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