b7d8c57908
Small allocations may bump total memory, raise THRESHOLD to 2Mb Reviewed-by: martin
68 lines
2.3 KiB
Java
68 lines
2.3 KiB
Java
/*
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* Copyright (c) 2002, 2015, 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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* @test
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* @bug 4369826 8078582
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* @summary Process with lots of output should not crash VM
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* @key intermittent
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* @author kladko
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*/
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public class LotsOfOutput {
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static final Runtime runtime = Runtime.getRuntime();
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// Allow memory to grow by up to 1Mb total
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static final int THRESHOLD = 1048576;
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// Compute used memory
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static long usedMemory() {
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return runtime.totalMemory() - runtime.freeMemory();
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}
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public static void main(String[] args) throws Exception {
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if (! UnixCommands.isUnix) {
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System.out.println("For UNIX only");
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return;
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}
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UnixCommands.ensureCommandsAvailable("cat");
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Process p = runtime.exec(UnixCommands.cat() + " /dev/zero");
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long initMemory = usedMemory();
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boolean growing = false;
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for (int i = 1; i < 10; i++) {
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Thread.sleep(100);
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long used = usedMemory();
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if (used != initMemory) {
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System.out.printf("consuming memory: i: %d, initial: %d, used: %d, delta: %d%n",
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i, initMemory, used, used - initMemory);
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}
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if (used > initMemory + THRESHOLD)
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growing = true;
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}
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if (growing)
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throw new Exception("Process consumes memory.");
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}
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}
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