1 /*
2 * Copyright (c) 2013, 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 import java.util.regex.Matcher;
25 import java.util.regex.Pattern;
26 import java.util.ArrayList;
27 import java.util.Arrays;
28
29 import com.oracle.java.testlibrary.*;
30 import sun.hotspot.WhiteBox;
31
32 class CompressedOopsErgoPrinter {
33 public static void main(String[] args) throws Exception {
34 WhiteBox wb = WhiteBox.getWhiteBox();
35 wb.printCompressedOopsHeapInfo();
36 }
37 }
38
39 final class HeapForCompressedOopsValues {
40 public long maxHeapForCompressedOops;
41 }
42
43 class TestUseCompressedOopsErgoTools {
44
45 public static boolean is64bitVM() {
46 String val = System.getProperty("sun.arch.data.model");
47 if (val == null) {
48 throw new RuntimeException("Could not read sun.arch.data.model");
49 }
50 if (val.equals("64")) {
51 return true;
52 } else if (val.equals("32")) {
53 return false;
54 }
55 throw new RuntimeException("Unexpected value " + val + " of sun.arch.data.model");
56 }
57
58 private static String[] join(String[] part1, String part2) {
59 ArrayList<String> result = new ArrayList<String>();
60 result.addAll(Arrays.asList(part1));
61 result.add(part2);
62 return result.toArray(new String[0]);
63 }
64
65 public static void checkCompressedOopsErgo(String[] gcflags) throws Exception {
66 HeapForCompressedOopsValues v = new HeapForCompressedOopsValues();
67
68 getMaxHeapForCompressedOops(gcflags, v);
69
70 checkUseCompressedOops(gcflags, v.maxHeapForCompressedOops, true);
71 checkUseCompressedOops(gcflags, v.maxHeapForCompressedOops - 1, true);
72 checkUseCompressedOops(gcflags, v.maxHeapForCompressedOops + 1, false);
73
74 // the use of HeapBaseMinAddress should not change the outcome
75 checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), v.maxHeapForCompressedOops, true);
76 checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), v.maxHeapForCompressedOops - 1, true);
77 checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), v.maxHeapForCompressedOops + 1, false);
78
79 // use a different object alignment
80 getMaxHeapForCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v);
81
82 checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v.maxHeapForCompressedOops, true);
83 checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v.maxHeapForCompressedOops - 1, true);
84 checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v.maxHeapForCompressedOops + 1, false);
85
86 // use a different ClassMetaspaceSize
87 getMaxHeapForCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v);
88
89 checkUseCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v.maxHeapForCompressedOops, true);
90 checkUseCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v.maxHeapForCompressedOops - 1, true);
91 checkUseCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v.maxHeapForCompressedOops + 1, false);
92 }
93
94 private static void checkUseCompressedOops(String[] args, long heapsize, boolean expectUseCompressedOops) throws Exception {
95 ArrayList<String> finalargs = new ArrayList<String>();
96 finalargs.addAll(Arrays.asList(args));
97 finalargs.add("-Xmx" + heapsize);
98 finalargs.add("-XX:+PrintFlagsFinal");
99 finalargs.add("-version");
100
101 String output = expectValid(finalargs.toArray(new String[0]));
102
103 boolean actualUseCompressedOops = getFlagBoolValue(" UseCompressedOops", output);
104
105 if (expectUseCompressedOops != actualUseCompressedOops) {
106 throw new RuntimeException("Expected use of compressed oops: " + expectUseCompressedOops + " but was: " + actualUseCompressedOops);
107 }
108 }
109
110 private static long valueAfter(String source, String match) {
111 int start = source.indexOf(match) + match.length();
112 String tail = source.substring(start).split(" ")[0];
113 return Long.parseLong(tail);
114 }
115
116 private static void getMaxHeapForCompressedOops(String[] args, HeapForCompressedOopsValues val) throws Exception {
117 ArrayList<String> finalargs = new ArrayList<String>();
118
119 String[] testVMopts = new String[] {
120 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
121 "-Xbootclasspath/a:.",
122 "-cp", System.getProperty("java.class.path"),
123 };
124
125 finalargs.addAll(Arrays.asList(args));
126 finalargs.addAll(Arrays.asList(testVMopts));
127 finalargs.add(CompressedOopsErgoPrinter.class.getName());
128
129 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
130 OutputAnalyzer output = new OutputAnalyzer(pb.start());
131 output.shouldHaveExitValue(0);
132
133 // the output we watch for has the following format:
134 //
135 // "Max heap for compressed oops X Max heap alignment Y ClassMetaspaceSize Z Page size A"
136 //
137 // where X, Y, Z and A are sizes in bytes.
138
139 Matcher m = Pattern.compile("Max heap for compressed oops \\d+ ClassMetaspaceSize \\d+").
140 matcher(output.getStdout());
141 if (!m.find()) {
142 throw new RuntimeException("Could not find heap size string.");
143 }
144 String match = m.group();
145
146 // parse actual values
147 val.maxHeapForCompressedOops = valueAfter(match, "Max heap for compressed oops ");
148 }
149
150 private static boolean getFlagBoolValue(String flag, String where) {
151 Matcher m = Pattern.compile(flag + "\\s+:?= (true|false)").matcher(where);
152 if (!m.find()) {
153 throw new RuntimeException("Could not find value for flag " + flag + " in output string");
154 }
155 String match = m.group();
156 return match.substring(match.lastIndexOf(" ") + 1, match.length()).equals("true");
157 }
158
159 private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception {
160 if (contains) {
161 output.shouldContain(message);
162 } else {
163 output.shouldNotContain(message);
164 }
165 }
166
167 private static String expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception {
168 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);
169 OutputAnalyzer output = new OutputAnalyzer(pb.start());
170 output.shouldHaveExitValue(errorcode);
171 return output.getStdout();
172 }
173
174 private static String expectValid(String[] flags) throws Exception {
175 return expect(flags, false, false, 0);
176 }
177 }
178