91 lines
3.5 KiB
Java
91 lines
3.5 KiB
Java
/*
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* Copyright (c) 2015, 2022, 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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// Note: we run the test with MallocLimit for the "other" category set to 100m (oom mode),
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// in order to trigger and observe a fake os::malloc oom. This needs NMT.
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/*
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* @test
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* @requires vm.compMode != "Xcomp"
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* @summary Verifies behaviour of Unsafe.allocateMemory
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:MallocLimit=other:100m:oom AllocateMemory
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*/
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import jdk.internal.misc.Unsafe;
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import static jdk.test.lib.Asserts.*;
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public class AllocateMemory {
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public static void main(String args[]) throws Exception {
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Unsafe unsafe = Unsafe.getUnsafe();
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// Allocate a byte, write to the location and read back the value
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long address = unsafe.allocateMemory(1);
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assertNotEquals(address, 0L);
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unsafe.putByte(address, Byte.MAX_VALUE);
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assertEquals(Byte.MAX_VALUE, unsafe.getByte(address));
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unsafe.freeMemory(address);
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// Call to allocateMemory() with a negative value should result in an IllegalArgumentException
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try {
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address = unsafe.allocateMemory(-1);
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throw new RuntimeException("Did not get expected IllegalArgumentException");
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} catch (IllegalArgumentException e) {
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// Expected
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assertNotEquals(address, 0L);
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}
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// allocateMemory() should throw an OutOfMemoryError when the underlying malloc fails,
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// since we start with -XX:MallocLimit
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try {
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address = unsafe.allocateMemory(100 * 1024 * 1024);
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throw new RuntimeException("Did not get expected OutOfMemoryError");
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} catch (OutOfMemoryError e) {
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// Expected
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}
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// Allocation should fail on a 32-bit system if the aligned-up
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// size overflows a size_t
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if (Unsafe.ADDRESS_SIZE == 4) {
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try {
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address = unsafe.allocateMemory((long)Integer.MAX_VALUE * 2);
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throw new RuntimeException("Did not get expected IllegalArgumentException");
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} catch (IllegalArgumentException e) {
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// Expected
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}
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}
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// Allocation should fail if the aligned-up size overflows a
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// Java long
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try {
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address = unsafe.allocateMemory((long)Long.MAX_VALUE);
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throw new RuntimeException("Did not get expected IllegalArgumentException");
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} catch (IllegalArgumentException e) {
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// Expected
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}
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}
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}
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