1 /*
2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
42 long address = unsafe.allocateMemory(1);
43 assertNotEquals(address, 0L);
44
45 unsafe.putByte(address, Byte.MAX_VALUE);
46 assertEquals(Byte.MAX_VALUE, unsafe.getByte(address));
47 unsafe.freeMemory(address);
48
49 // Call to allocateMemory() with a negative value should result in an IllegalArgumentException
50 try {
51 address = unsafe.allocateMemory(-1);
52 throw new RuntimeException("Did not get expected IllegalArgumentException");
53 } catch (IllegalArgumentException e) {
54 // Expected
55 assertNotEquals(address, 0L);
56 }
57
58 // allocateMemory() should throw an OutOfMemoryError when the underlying malloc fails,
59 // we test this by limiting the malloc using -XX:MallocMaxTestWords
60 try {
61 address = unsafe.allocateMemory(100 * 1024 * 1024 * 8);
62 } catch (OutOfMemoryError e) {
63 // Expected
64 return;
65 }
66 throw new RuntimeException("Did not get expected OutOfMemoryError");
67 }
68 }
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1 /*
2 * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
42 long address = unsafe.allocateMemory(1);
43 assertNotEquals(address, 0L);
44
45 unsafe.putByte(address, Byte.MAX_VALUE);
46 assertEquals(Byte.MAX_VALUE, unsafe.getByte(address));
47 unsafe.freeMemory(address);
48
49 // Call to allocateMemory() with a negative value should result in an IllegalArgumentException
50 try {
51 address = unsafe.allocateMemory(-1);
52 throw new RuntimeException("Did not get expected IllegalArgumentException");
53 } catch (IllegalArgumentException e) {
54 // Expected
55 assertNotEquals(address, 0L);
56 }
57
58 // allocateMemory() should throw an OutOfMemoryError when the underlying malloc fails,
59 // we test this by limiting the malloc using -XX:MallocMaxTestWords
60 try {
61 address = unsafe.allocateMemory(100 * 1024 * 1024 * 8);
62 throw new RuntimeException("Did not get expected OutOfMemoryError");
63 } catch (OutOfMemoryError e) {
64 // Expected
65 }
66
67 // Allocation should fail on a 32-bit system if the aligned-up
68 // size overflows a size_t
69 if (Unsafe.ADDRESS_SIZE == 4) {
70 try {
71 address = unsafe.allocateMemory((long)Integer.MAX_VALUE * 2);
72 throw new RuntimeException("Did not get expected IllegalArgumentException");
73 } catch (IllegalArgumentException e) {
74 // Expected
75 }
76 }
77
78 // Allocation should fail if the aligned-up size overflows a
79 // Java long
80 try {
81 address = unsafe.allocateMemory((long)Long.MAX_VALUE);
82 throw new RuntimeException("Did not get expected IllegalArgumentException");
83 } catch (IllegalArgumentException e) {
84 // Expected
85 }
86 }
87 }
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