1 /*
2 * Copyright (c) 2014, 2018, 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 /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 * @build sun.hotspot.WhiteBox
32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
33 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. UseCompressedOops
34 */
35 import java.util.ArrayList;
36 import java.util.Collections;
37 import jdk.test.lib.Platform;
38 import jdk.test.lib.process.ProcessTools;
39 import jdk.test.lib.process.OutputAnalyzer;
40
41 import sun.hotspot.code.Compiler;
42
43 public class UseCompressedOops {
44
45 public static void main(String[] args) throws Exception {
46 testCompressedOopsModesGCs();
47 testCompressedOopsModesGCs("-XX:+UseLargePages");
48 }
49
50 public static void testCompressedOopsModesGCs(String... flags) throws Exception {
51 ArrayList<String> args = new ArrayList<>();
52 Collections.addAll(args, flags);
53
54 // Test default.
55 testCompressedOopsModes(args);
56 // Test GCs.
57 testCompressedOopsModes(args, "-XX:+UseG1GC");
58 if (!Compiler.isGraalEnabled()) { // Graal does not support CMS
59 testCompressedOopsModes(args, "-XX:+UseConcMarkSweepGC");
60 }
61 testCompressedOopsModes(args, "-XX:+UseSerialGC");
62 testCompressedOopsModes(args, "-XX:+UseParallelGC");
63 testCompressedOopsModes(args, "-XX:+UseParallelOldGC");
64 }
65
66 public static void testCompressedOopsModes(ArrayList<String> flags1, String... flags2) throws Exception {
67 ArrayList<String> args = new ArrayList<>();
68 args.addAll(flags1);
69 Collections.addAll(args, flags2);
70
71 if (Platform.is64bit()) {
72 // Explicitly turn of compressed oops
73 testCompressedOops(args, "-XX:-UseCompressedOops", "-Xmx32m")
74 .shouldNotContain("Compressed Oops")
75 .shouldHaveExitValue(0);
76
77 // Compressed oops should be on by default
78 testCompressedOops(args, "-Xmx32m")
79 .shouldContain("Compressed Oops mode")
80 .shouldHaveExitValue(0);
81
82 // Explicly enabling compressed oops
83 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m")
84 .shouldContain("Compressed Oops mode")
85 .shouldHaveExitValue(0);
86
87 // Skip the following three test cases if we're on OSX or Solaris.
88 //
89 // OSX doesn't seem to care about HeapBaseMinAddress and Solaris
90 // puts the heap way up, forcing different behaviour.
91 if (!Platform.isOSX() && !Platform.isSolaris()) {
92 // Larger than 4gb heap should result in zero based with shift 3
93 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx5g")
94 .shouldContain("Zero based")
95 .shouldContain("Oop shift amount: 3")
96 .shouldHaveExitValue(0);
97
98 // Larger than 3gb heap and HeapBaseMinAddress=1g should result in zero based with shift 3
99 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx3200m", "-XX:HeapBaseMinAddress=1g")
100 .shouldContain("Zero based")
101 .shouldContain("Oop shift amount: 3")
102 .shouldHaveExitValue(0);
103
104 // Small heap above 4gb should result in zero based with shift 3
105 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g")
106 .shouldContain("Zero based")
107 .shouldContain("Oop shift amount: 3")
108 .shouldHaveExitValue(0);
109
110 // Small heap above 32gb should result in non-zero based with shift 3
111 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g")
112 .shouldContain("Non-zero disjoint base")
113 .shouldContain("Oop shift amount: 3")
114 .shouldHaveExitValue(0);
115
116 // Small heap above 32gb should result in non-zero based with shift 3
117 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=72704m")
118 .shouldContain("Non-zero based")
119 .shouldContain("Oop shift amount: 3")
120 .shouldHaveExitValue(0);
121
122 // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result
123 // in non-zero based with shift 4
124 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16",
125 "-XX:HeapBaseMinAddress=64g")
126 .shouldContain("Non-zero disjoint base")
127 .shouldContain("Oop shift amount: 4")
128 .shouldHaveExitValue(0);
129
130 // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4
131 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16")
132 .shouldContain("Zero based")
133 .shouldContain("Oop shift amount: 4")
134 .shouldHaveExitValue(0);
135 }
136
137 // This is a pathologic case for the heap allocation algorithm. Regression test.
138 // HeapBaseMinAddress must be 2g and should not be set on the command line.
139 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx2g")
140 .shouldNotContain("Max heap size too large for Compressed Oops")
141 .shouldHaveExitValue(0);
142 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx29g", "-XX:CompressedClassSpaceSize=1g")
143 .shouldNotContain("Max heap size too large for Compressed Oops")
144 .shouldHaveExitValue(0);
145
146 // Explicitly enabling compressed oops with 32gb heap should result a warning
147 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g")
148 .shouldContain("Max heap size too large for Compressed Oops")
149 .shouldHaveExitValue(0);
150
151 // 32gb heap should not result a warning
152 testCompressedOops(args, "-Xmx32g")
153 .shouldNotContain("Max heap size too large for Compressed Oops")
154 .shouldHaveExitValue(0);
155
156 // Explicitly enabling compressed oops with 32gb heap and object
157 // alignment set to 8 byte should result a warning
158 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8")
159 .shouldContain("Max heap size too large for Compressed Oops")
160 .shouldHaveExitValue(0);
161
162 // 64gb heap and object alignment set to 16 bytes should result in a warning
163 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16")
164 .shouldContain("Max heap size too large for Compressed Oops")
165 .shouldHaveExitValue(0);
166
167 } else {
168 // Compressed oops should only apply to 64bit platforms
169 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m")
170 .shouldContain("Unrecognized VM option 'UseCompressedOops'")
171 .shouldHaveExitValue(1);
172 }
173 }
174
175 private static OutputAnalyzer testCompressedOops(ArrayList<String> flags1, String... flags2) throws Exception {
176 ArrayList<String> args = new ArrayList<>();
177
178 // Always run with these three:
179 args.add("-XX:+PrintCompressedOopsMode");
180 args.add("-Xms32m");
181
182 // Add the extra flags
183 args.addAll(flags1);
184 Collections.addAll(args, flags2);
185
186 args.add("-version");
187
188 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
189 return new OutputAnalyzer(pb.start());
190 }
191 }