1 /*
2 * Copyright (c) 2014, 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 8022865
27 * @summary Tests for different combination of UseCompressedOops options
28 * @library /testlibrary
29 * @run main UseCompressedOops
30 */
31 import java.util.ArrayList;
32 import java.util.Collections;
33 import com.oracle.java.testlibrary.*;
34
35 public class UseCompressedOops {
36
37 public static void main(String[] args) throws Exception {
38
39 if (Platform.is64bit()) {
40 // Explicitly turn of compressed oops
41 testCompressedOops("-XX:-UseCompressedOops", "-Xmx32m")
42 .shouldNotContain("Compressed Oops")
43 .shouldHaveExitValue(0);
44
45 // Compressed oops should be on by default
46 testCompressedOops("-Xmx32m")
47 .shouldContain("Compressed Oops mode")
48 .shouldHaveExitValue(0);
49
50 // Explicly enabling compressed oops
51 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m")
52 .shouldContain("Compressed Oops mode")
53 .shouldHaveExitValue(0);
54
55 // Skip the following three test cases if we're on OSX or Solaris.
56 //
57 // OSX doesn't seem to care about HeapBaseMinAddress and Solaris
58 // puts the heap way up, forcing different behaviour.
59 if (!Platform.isOSX() && !Platform.isSolaris()) {
60 // Larger than 4gb heap should result in zero based with shift 3
61 testCompressedOops("-XX:+UseCompressedOops", "-Xmx5g")
62 .shouldContain("Zero based")
63 .shouldContain("Oop shift amount: 3")
64 .shouldHaveExitValue(0);
65
66 // Larger than 3gb heap and HeapBaseMinAddress=1g should result in zero based with shift 3
67 testCompressedOops("-XX:+UseCompressedOops", "-Xmx3200m", "-XX:HeapBaseMinAddress=1g")
68 .shouldContain("Zero based")
69 .shouldContain("Oop shift amount: 3")
70 .shouldHaveExitValue(0);
71
72 // Small heap above 4gb should result in zero based with shift 3
73 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g")
74 .shouldContain("Zero based")
75 .shouldContain("Oop shift amount: 3")
76 .shouldHaveExitValue(0);
77
78 // Small heap above 32gb should result in non-zero based with shift 3
79 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g")
80 .shouldContain("Non-zero disjoint base")
81 .shouldContain("Oop shift amount: 3")
82 .shouldHaveExitValue(0);
83
84 // Small heap above 32gb should result in non-zero based with shift 3
85 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=72704m")
86 .shouldContain("Non-zero based")
87 .shouldContain("Oop shift amount: 3")
88 .shouldHaveExitValue(0);
89
90 // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result
91 // in non-zero based with shift 4
92 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16",
93 "-XX:HeapBaseMinAddress=64g")
94 .shouldContain("Non-zero disjoint base")
95 .shouldContain("Oop shift amount: 4")
96 .shouldHaveExitValue(0);
97
98 // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4
99 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16")
100 .shouldContain("Zero based")
101 .shouldContain("Oop shift amount: 4")
102 .shouldHaveExitValue(0);
103 }
104
105 // Explicitly enabling compressed oops with 32gb heap should result a warning
106 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g")
107 .shouldContain("Max heap size too large for Compressed Oops")
108 .shouldHaveExitValue(0);
109
110 // 32gb heap should not result a warning
111 testCompressedOops("-Xmx32g")
112 .shouldNotContain("Max heap size too large for Compressed Oops")
113 .shouldHaveExitValue(0);
114
115 // Explicitly enabling compressed oops with 32gb heap and object
116 // alignment set to 8 byte should result a warning
117 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8")
118 .shouldContain("Max heap size too large for Compressed Oops")
119 .shouldHaveExitValue(0);
120
121 // 64gb heap and object alignment set to 16 bytes should result in a warning
122 testCompressedOops("-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16")
123 .shouldContain("Max heap size too large for Compressed Oops")
124 .shouldHaveExitValue(0);
125
126 } else {
127 // Compressed oops should only apply to 64bit platforms
128 testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m")
129 .shouldContain("Unrecognized VM option 'UseCompressedOops'")
130 .shouldHaveExitValue(1);
131 }
132 }
133
134 private static OutputAnalyzer testCompressedOops(String... flags) throws Exception {
135 ArrayList<String> args = new ArrayList<>();
136
137 // Always run with these three:
138 args.add("-XX:+UnlockDiagnosticVMOptions");
139 args.add("-XX:+PrintCompressedOopsMode");
140 args.add("-Xms32m");
141
142 // Add the extra flags
143 Collections.addAll(args, flags);
144
145 args.add("-version");
146
147 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
148 return new OutputAnalyzer(pb.start());
149 }
150 }