41052
|
1 |
/*
|
|
2 |
* Copyright (c) 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 |
*/
|
|
23 |
|
|
24 |
/*
|
|
25 |
* @test
|
|
26 |
* @bug 8161720
|
|
27 |
* @modules java.base/jdk.internal.misc
|
|
28 |
* @run main/othervm -Xint UnsafeOffHeapBooleanTest 1
|
|
29 |
* @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=3 -Xbatch UnsafeOffHeapBooleanTest 20000
|
|
30 |
* @run main/othervm -XX:-TieredCompilation -Xbatch UnsafeOffHeapBooleanTest 20000
|
|
31 |
*/
|
|
32 |
|
|
33 |
|
|
34 |
import java.lang.reflect.Field;
|
|
35 |
import jdk.internal.misc.Unsafe;
|
|
36 |
|
|
37 |
public class UnsafeOffHeapBooleanTest {
|
|
38 |
static boolean bool0 = false, bool1 = false, result = false;
|
|
39 |
static Unsafe UNSAFE = Unsafe.getUnsafe();
|
|
40 |
static long offHeapMemory;
|
|
41 |
|
|
42 |
public static void test() {
|
|
43 |
// Write two bytes to the off-heap memory location, both
|
|
44 |
// bytes correspond to the boolean value 'true'.
|
|
45 |
UNSAFE.putShort(null, offHeapMemory, (short)0x0204);
|
|
46 |
|
|
47 |
// Read two bytes from the storage allocated above (as booleans).
|
|
48 |
bool0 = UNSAFE.getBoolean(null, offHeapMemory + 0);
|
|
49 |
bool1 = UNSAFE.getBoolean(null, offHeapMemory + 1);
|
|
50 |
result = bool0 & bool1;
|
|
51 |
}
|
|
52 |
|
|
53 |
public static void main(String args[]) {
|
|
54 |
System.out.println("### Test started");
|
|
55 |
|
|
56 |
if (args.length != 1) {
|
|
57 |
throw new RuntimeException("### Test failure: test called with incorrect number of arguments");
|
|
58 |
}
|
|
59 |
|
|
60 |
// Allocate two bytes of storage.
|
|
61 |
offHeapMemory = UNSAFE.allocateMemory(2);
|
|
62 |
|
|
63 |
try {
|
|
64 |
for (int i = 0; i < Integer.parseInt(args[0]); i++) {
|
|
65 |
test();
|
|
66 |
}
|
|
67 |
|
|
68 |
// Check if the two 'true' boolean values were normalized
|
|
69 |
// (i.e., reduced from the range 1...255 to 1).
|
|
70 |
if (!bool0 || !bool1 || !result) {
|
|
71 |
System.out.println("Some of the results below are wrong");
|
|
72 |
System.out.println("bool0 is: " + bool0);
|
|
73 |
System.out.println("bool1 is: " + bool1);
|
|
74 |
System.out.println("bool0 & bool1 is: " + result);
|
|
75 |
System.out.println("===================================");
|
|
76 |
throw new RuntimeException("### Test failed");
|
|
77 |
} else {
|
|
78 |
System.out.println("Test generated correct results");
|
|
79 |
System.out.println("bool0 is: " + bool0);
|
|
80 |
System.out.println("bool1 is: " + bool1);
|
|
81 |
System.out.println("bool0 & bool1 is: " + result);
|
|
82 |
System.out.println("===================================");
|
|
83 |
}
|
|
84 |
} catch (NumberFormatException e) {
|
|
85 |
throw new RuntimeException("### Test failure: test called with incorrectly formatted parameter");
|
|
86 |
}
|
|
87 |
|
|
88 |
UNSAFE.freeMemory(offHeapMemory);
|
|
89 |
|
|
90 |
System.out.println("### Test passed");
|
|
91 |
}
|
|
92 |
}
|