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 ErgoArgsPrinter {
33 public static void main(String[] args) throws Exception {
34 WhiteBox wb = WhiteBox.getWhiteBox();
35 wb.printHeapSizes();
36 }
37 }
38
39 final class MinInitialMaxValues {
40 public long minHeapSize;
41 public long initialHeapSize;
42 public long maxHeapSize;
43
44 public long minAlignment;
45 public long maxAlignment;
46 }
47
48 class TestMaxHeapSizeTools {
49
50 public static void checkMinInitialMaxHeapFlags(String gcflag) throws Exception {
51 checkInvalidMinInitialHeapCombinations(gcflag);
52 checkValidMinInitialHeapCombinations(gcflag);
53 checkInvalidInitialMaxHeapCombinations(gcflag);
54 checkValidInitialMaxHeapCombinations(gcflag);
55 }
56
57 public static void checkMinInitialErgonomics(String gcflag) throws Exception {
58 // heap sizing ergonomics use the value NewSize + OldSize as default values
59 // for ergonomics calculation. Retrieve these values.
60 long[] values = new long[2];
61 getNewOldSize(gcflag, values);
62
63 // we check cases with values smaller and larger than this default value.
64 long newPlusOldSize = values[0] + values[1];
65 long smallValue = newPlusOldSize / 2;
66 long largeValue = newPlusOldSize * 2;
67
68 // -Xms is not set
69 checkErgonomics(new String[] { gcflag, "-Xmx16M" }, values, -1, -1);
70 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
71 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
72 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=0" }, values, -1, -1);
73
74 // -Xms is set to zero
75 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0" }, values, -1, -1);
76 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
77 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
78 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=0" }, values, -1, -1);
79
80 // -Xms is set to small value
81 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue }, values, -1, -1);
82 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
83 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + largeValue }, values, smallValue, largeValue);
84 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=0" }, values, smallValue, -1);
85
86 // -Xms is set to large value
87 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue }, values, largeValue, largeValue);
88 // the next case has already been checked elsewhere and gives an error
89 // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
90 // the next case has already been checked elsewhere too
91 // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + largeValue }, values, values[0], largeValue);
92 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=0" }, values, largeValue, -1);
93 }
94
95 private static long align_up(long value, long alignment) {
96 long alignmentMinusOne = alignment - 1;
97 return (value + alignmentMinusOne) & ~alignmentMinusOne;
98 }
99
100 private static void getNewOldSize(String gcflag, long[] values) throws Exception {
101 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(gcflag,
102 "-XX:+PrintFlagsFinal", "-version");
103 OutputAnalyzer output = new OutputAnalyzer(pb.start());
104 output.shouldHaveExitValue(0);
105
106 String stdout = output.getStdout();
107 values[0] = getFlagValue(" NewSize", stdout);
108 values[1] = getFlagValue(" OldSize", stdout);
109 }
110
111 public static void checkGenMaxHeapErgo(String gcflag) throws Exception {
112 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 3);
113 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 4);
114 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 5);
115 }
116
117 private static void checkInvalidMinInitialHeapCombinations(String gcflag) throws Exception {
118 expectError(new String[] { gcflag, "-Xms8M", "-XX:InitialHeapSize=4M", "-version" });
119 }
120
121 private static void checkValidMinInitialHeapCombinations(String gcflag) throws Exception {
122 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms4M", "-version" });
123 expectValid(new String[] { gcflag, "-Xms4M", "-XX:InitialHeapSize=8M", "-version" });
124 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms8M", "-version" });
125 // the following is not an error as -Xms sets both minimal and initial heap size
126 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-Xms8M", "-version" });
127 }
128
129 private static void checkInvalidInitialMaxHeapCombinations(String gcflag) throws Exception {
130 expectError(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=8M", "-version" });
131 expectError(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-XX:MaxHeapSize=4M", "-version" });
132 }
133
134 private static void checkValidInitialMaxHeapCombinations(String gcflag) throws Exception {
135 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-XX:MaxHeapSize=8M", "-version" });
136 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=8M", "-XX:InitialHeapSize=4M", "-version" });
137 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=4M", "-version" });
138 // a value of "0" for initial heap size means auto-detect
139 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=0M", "-version" });
140 }
141
142 private static long valueAfter(String source, String match) {
143 int start = source.indexOf(match) + match.length();
144 String tail = source.substring(start).split(" ")[0];
145 return Long.parseLong(tail);
146 }
147
148 private static void getMinInitialMaxHeap(String[] args, MinInitialMaxValues val) throws Exception {
149 ArrayList<String> finalargs = new ArrayList<String>();
150
151 String[] testVMopts = new String[] {
152 "-Xbootclasspath/a:.",
153 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
154 "-cp", System.getProperty("java.class.path"),
155 };
156 // System.getProperty("test.java.opts") is '' if no options is set,
157 // we need to skip such a result
158 String[] externalVMOpts = new String[0];
159 if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
160 externalVMOpts = System.getProperty("test.java.opts").split(" ");
161 }
162
163 finalargs.addAll(Arrays.asList(externalVMOpts));
164 finalargs.addAll(Arrays.asList(args));
165 finalargs.addAll(Arrays.asList(testVMopts));
166 finalargs.add(ErgoArgsPrinter.class.getName());
167
168 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
169 OutputAnalyzer output = new OutputAnalyzer(pb.start());
170 output.shouldHaveExitValue(0);
171
172 // the output we watch for has the following format:
173 //
174 // "Minimum heap X Initial heap Y Maximum heap Z Min alignment A Max Alignment B"
175 //
176 // where A, B, X, Y and Z are sizes in bytes.
177 // Unfortunately there is no other way to retrieve the minimum heap size and
178 // the alignments.
179
180 Matcher m = Pattern.compile("Minimum heap \\d+ Initial heap \\d+ Maximum heap \\d+ Min alignment \\d+ Max alignment \\d+").
181 matcher(output.getStdout());
182 if (!m.find()) {
183 throw new RuntimeException("Could not find heap size string.");
184 }
185
186 String match = m.group();
187
188 // actual values
189 val.minHeapSize = valueAfter(match, "Minimum heap ");
190 val.initialHeapSize = valueAfter(match, "Initial heap ");
191 val.maxHeapSize = valueAfter(match, "Maximum heap ");
192 val.minAlignment = valueAfter(match, "Min alignment ");
193 val.maxAlignment = valueAfter(match, "Max alignment ");
194 }
195
196 /**
197 * Verify whether the VM automatically synchronizes minimum and initial heap size if only
198 * one is given for the GC specified.
199 */
200 public static void checkErgonomics(String[] args, long[] newoldsize,
201 long expectedMin, long expectedInitial) throws Exception {
202
203 MinInitialMaxValues v = new MinInitialMaxValues();
204 getMinInitialMaxHeap(args, v);
205
206 if ((expectedMin != -1) && (align_up(expectedMin, v.minAlignment) != v.minHeapSize)) {
207 throw new RuntimeException("Actual minimum heap size of " + v.minHeapSize +
208 " differs from expected minimum heap size of " + expectedMin);
209 }
210
211 if ((expectedInitial != -1) && (align_up(expectedInitial, v.minAlignment) != v.initialHeapSize)) {
212 throw new RuntimeException("Actual initial heap size of " + v.initialHeapSize +
213 " differs from expected initial heap size of " + expectedInitial);
214 }
215
216 // always check the invariant min <= initial <= max heap size
217 if (!(v.minHeapSize <= v.initialHeapSize && v.initialHeapSize <= v.maxHeapSize)) {
218 throw new RuntimeException("Inconsistent min/initial/max heap sizes, they are " +
219 v.minHeapSize + "/" + v.initialHeapSize + "/" + v.maxHeapSize);
220 }
221 }
222
223 /**
224 * Verify whether the VM respects the given maximum heap size in MB for the
225 * GC specified.
226 * @param gcflag The garbage collector to test as command line flag. E.g. -XX:+UseG1GC
227 * @param maxHeapSize the maximum heap size to verify, in MB.
228 */
229 public static void checkGenMaxHeapSize(String gcflag, long maxHeapsize) throws Exception {
230 final long K = 1024;
231
232 MinInitialMaxValues v = new MinInitialMaxValues();
233 getMinInitialMaxHeap(new String[] { gcflag, "-XX:MaxHeapSize=" + maxHeapsize + "M" }, v);
234
235 long expectedHeapSize = align_up(maxHeapsize * K * K, v.maxAlignment);
236 long actualHeapSize = v.maxHeapSize;
237
238 if (actualHeapSize > expectedHeapSize) {
239 throw new RuntimeException("Heap has " + actualHeapSize +
240 " bytes, expected to be less than " + expectedHeapSize);
241 }
242 }
243
244 private static long getFlagValue(String flag, String where) {
245 Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);
246 if (!m.find()) {
247 throw new RuntimeException("Could not find value for flag " + flag + " in output string");
248 }
249 String match = m.group();
250 return Long.parseLong(match.substring(match.lastIndexOf(" ") + 1, match.length()));
251 }
252
253 private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception {
254 if (contains) {
255 output.shouldContain(message);
256 } else {
257 output.shouldNotContain(message);
258 }
259 }
260
261 private static void expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception {
262 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);
263 OutputAnalyzer output = new OutputAnalyzer(pb.start());
264 shouldContainOrNot(output, hasWarning, "Warning");
265 shouldContainOrNot(output, hasError, "Error");
266 output.shouldHaveExitValue(errorcode);
267 }
268
269 private static void expectError(String[] flags) throws Exception {
270 expect(flags, false, true, 1);
271 }
272
273 private static void expectValid(String[] flags) throws Exception {
274 expect(flags, false, false, 0);
275 }
276 }
277