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 package jdk.testlibrary;
25
26 import static jdk.testlibrary.Asserts.assertTrue;
27
28 import java.io.BufferedReader;
29 import java.io.File;
30 import java.io.FileReader;
31 import java.io.IOException;
32 import java.net.InetAddress;
33 import java.net.ServerSocket;
34 import java.net.UnknownHostException;
35 import java.util.ArrayList;
36 import java.util.List;
37 import java.util.Arrays;
38 import java.util.Collections;
39 import java.util.regex.Pattern;
40 import java.util.regex.Matcher;
41 import java.util.concurrent.TimeUnit;
42
43 /**
44 * Common library for various test helper functions.
45 */
46 public final class Utils {
47
48 /**
49 * Returns the sequence used by operating system to separate lines.
50 */
51 public static final String NEW_LINE = System.getProperty("line.separator");
52
53 /**
54 * Returns the value of 'test.vm.opts'system property.
55 */
56 public static final String VM_OPTIONS = System.getProperty("test.vm.opts", "").trim();
57
58 /**
59 * Returns the value of 'test.java.opts'system property.
60 */
61 public static final String JAVA_OPTIONS = System.getProperty("test.java.opts", "").trim();
62
63 /**
64 * Returns the value of 'test.timeout.factor' system property
65 * converted to {@code double}.
66 */
67 public static final double TIMEOUT_FACTOR;
68 static {
69 String toFactor = System.getProperty("test.timeout.factor", "1.0");
70 TIMEOUT_FACTOR = Double.parseDouble(toFactor);
71 }
72
73 /**
74 * Returns the value of JTREG default test timeout in milliseconds
75 * converted to {@code long}.
76 */
77 public static final long DEFAULT_TEST_TIMEOUT = TimeUnit.SECONDS.toMillis(120);
78
79 private Utils() {
80 // Private constructor to prevent class instantiation
81 }
82
83 /**
84 * Returns the list of VM options.
85 *
86 * @return List of VM options
87 */
88 public static List<String> getVmOptions() {
89 return Arrays.asList(safeSplitString(VM_OPTIONS));
90 }
91
92 /**
93 * Returns the list of VM options with -J prefix.
94 *
95 * @return The list of VM options with -J prefix
96 */
97 public static List<String> getForwardVmOptions() {
98 String[] opts = safeSplitString(VM_OPTIONS);
99 for (int i = 0; i < opts.length; i++) {
100 opts[i] = "-J" + opts[i];
101 }
102 return Arrays.asList(opts);
103 }
104
105 /**
106 * Returns the default JTReg arguments for a jvm running a test.
107 * This is the combination of JTReg arguments test.vm.opts and test.java.opts.
108 * @return An array of options, or an empty array if no opptions.
109 */
110 public static String[] getTestJavaOpts() {
111 List<String> opts = new ArrayList<String>();
112 Collections.addAll(opts, safeSplitString(VM_OPTIONS));
113 Collections.addAll(opts, safeSplitString(JAVA_OPTIONS));
114 return opts.toArray(new String[0]);
115 }
116
117 /**
118 * Combines given arguments with default JTReg arguments for a jvm running a test.
119 * This is the combination of JTReg arguments test.vm.opts and test.java.opts
120 * @return The combination of JTReg test java options and user args.
121 */
122 public static String[] addTestJavaOpts(String... userArgs) {
123 List<String> opts = new ArrayList<String>();
124 Collections.addAll(opts, getTestJavaOpts());
125 Collections.addAll(opts, userArgs);
126 return opts.toArray(new String[0]);
127 }
128
129 /**
130 * Removes any options specifying which GC to use, for example "-XX:+UseG1GC".
131 * Removes any options matching: -XX:(+/-)Use*GC
132 * Used when a test need to set its own GC version. Then any
133 * GC specified by the framework must first be removed.
134 * @return A copy of given opts with all GC options removed.
135 */
136 private static final Pattern useGcPattern = Pattern.compile(
137 "(?:\\-XX\\:[\\+\\-]Use.+GC)"
138 + "|(?:\\-Xconcgc)");
139 public static List<String> removeGcOpts(List<String> opts) {
140 List<String> optsWithoutGC = new ArrayList<String>();
141 for (String opt : opts) {
142 if (useGcPattern.matcher(opt).matches()) {
143 System.out.println("removeGcOpts: removed " + opt);
144 } else {
145 optsWithoutGC.add(opt);
146 }
147 }
148 return optsWithoutGC;
149 }
150
151 /**
152 * Splits a string by white space.
153 * Works like String.split(), but returns an empty array
154 * if the string is null or empty.
155 */
156 private static String[] safeSplitString(String s) {
157 if (s == null || s.trim().isEmpty()) {
158 return new String[] {};
159 }
160 return s.trim().split("\\s+");
161 }
162
163 /**
164 * @return The full command line for the ProcessBuilder.
165 */
166 public static String getCommandLine(ProcessBuilder pb) {
167 StringBuilder cmd = new StringBuilder();
168 for (String s : pb.command()) {
169 cmd.append(s).append(" ");
170 }
171 return cmd.toString();
172 }
173
174 /**
175 * Returns the free port on the local host.
176 * The function will spin until a valid port number is found.
177 *
178 * @return The port number
179 * @throws InterruptedException if any thread has interrupted the current thread
180 * @throws IOException if an I/O error occurs when opening the socket
181 */
182 public static int getFreePort() throws InterruptedException, IOException {
183 int port = -1;
184
185 while (port <= 0) {
186 Thread.sleep(100);
187
188 ServerSocket serverSocket = null;
189 try {
190 serverSocket = new ServerSocket(0);
191 port = serverSocket.getLocalPort();
192 } finally {
193 serverSocket.close();
194 }
195 }
196
197 return port;
198 }
199
200 /**
201 * Returns the name of the local host.
202 *
203 * @return The host name
204 * @throws UnknownHostException if IP address of a host could not be determined
205 */
206 public static String getHostname() throws UnknownHostException {
207 InetAddress inetAddress = InetAddress.getLocalHost();
208 String hostName = inetAddress.getHostName();
209
210 assertTrue((hostName != null && !hostName.isEmpty()),
211 "Cannot get hostname");
212
213 return hostName;
214 }
215
216 /**
217 * Uses "jcmd -l" to search for a jvm pid. This function will wait
218 * forever (until jtreg timeout) for the pid to be found.
219 * @param key Regular expression to search for
220 * @return The found pid.
221 */
222 public static int waitForJvmPid(String key) throws Throwable {
223 final long iterationSleepMillis = 250;
224 System.out.println("waitForJvmPid: Waiting for key '" + key + "'");
225 System.out.flush();
226 while (true) {
227 int pid = tryFindJvmPid(key);
228 if (pid >= 0) {
229 return pid;
230 }
231 Thread.sleep(iterationSleepMillis);
232 }
233 }
234
235 /**
236 * Searches for a jvm pid in the output from "jcmd -l".
237 *
238 * Example output from jcmd is:
239 * 12498 sun.tools.jcmd.JCmd -l
240 * 12254 /tmp/jdk8/tl/jdk/JTwork/classes/com/sun/tools/attach/Application.jar
241 *
242 * @param key A regular expression to search for.
243 * @return The found pid, or -1 if Enot found.
244 * @throws Exception If multiple matching jvms are found.
245 */
246 public static int tryFindJvmPid(String key) throws Throwable {
247 OutputAnalyzer output = null;
248 try {
249 JDKToolLauncher jcmdLauncher = JDKToolLauncher.create("jcmd");
250 jcmdLauncher.addToolArg("-l");
251 output = ProcessTools.executeProcess(jcmdLauncher.getCommand());
252 output.shouldHaveExitValue(0);
253
254 // Search for a line starting with numbers (pid), follwed by the key.
255 Pattern pattern = Pattern.compile("([0-9]+)\\s.*(" + key + ").*\\r?\\n");
256 Matcher matcher = pattern.matcher(output.getStdout());
257
258 int pid = -1;
259 if (matcher.find()) {
260 pid = Integer.parseInt(matcher.group(1));
261 System.out.println("findJvmPid.pid: " + pid);
262 if (matcher.find()) {
263 throw new Exception("Found multiple JVM pids for key: " + key);
264 }
265 }
266 return pid;
267 } catch (Throwable t) {
268 System.out.println(String.format("Utils.findJvmPid(%s) failed: %s", key, t));
269 throw t;
270 }
271 }
272
273 /**
274 * Returns file content as a list of strings
275 *
276 * @param file File to operate on
277 * @return List of strings
278 * @throws IOException
279 */
280 public static List<String> fileAsList(File file) throws IOException {
281 assertTrue(file.exists() && file.isFile(),
282 file.getAbsolutePath() + " does not exist or not a file");
283 List<String> output = new ArrayList<>();
284 try (BufferedReader reader = new BufferedReader(new FileReader(file.getAbsolutePath()))) {
285 while (reader.ready()) {
286 output.add(reader.readLine().replace(NEW_LINE, ""));
287 }
288 }
289 return output;
290 }
291
292 /**
293 * Adjusts the provided timeout value for the TIMEOUT_FACTOR
294 * @param tOut the timeout value to be adjusted
295 * @return The timeout value adjusted for the value of "test.timeout.factor"
296 * system property
297 */
298 public static long adjustTimeout(long tOut) {
299 return Math.round(tOut * Utils.TIMEOUT_FACTOR);
300 }
301 }