1 /* 2 * Copyright (c) 2013, 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 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 * Returns the default JTReg arguments for a jvm running a test without 119 * options that matches regular expressions in {@code filters}. 120 * This is the combination of JTReg arguments test.vm.opts and test.java.opts. 121 * @param filters Regular expressions used to filter out options. 122 * @return An array of options, or an empty array if no options. 123 */ 124 public static String[] getFilteredTestJavaOpts(String... filters) { 125 String options[] = getTestJavaOpts(); 126 127 if (filters.length == 0) { 128 return options; 129 } 130 131 List<String> filteredOptions = new ArrayList<>(options.length); 132 Pattern patterns[] = new Pattern[filters.length]; 133 for (int i = 0; i < filters.length; i++) { 134 patterns[i] = Pattern.compile(filters[i]); 135 } 136 137 for (String option : options) { 138 boolean matched = false; 139 for (int i = 0; i < patterns.length && !matched; i++) { 140 Matcher matcher = patterns[i].matcher(option); 141 matched = matcher.find(); 142 } 143 if (!matched) { 144 filteredOptions.add(option); 145 } 146 } 147 148 return filteredOptions.toArray(new String[filteredOptions.size()]); 149 } 150 151 /** 152 * Combines given arguments with default JTReg arguments for a jvm running a test. 153 * This is the combination of JTReg arguments test.vm.opts and test.java.opts 154 * @return The combination of JTReg test java options and user args. 155 */ 156 public static String[] addTestJavaOpts(String... userArgs) { 157 List<String> opts = new ArrayList<String>(); 158 Collections.addAll(opts, getTestJavaOpts()); 159 Collections.addAll(opts, userArgs); 160 return opts.toArray(new String[0]); 161 } 162 163 /** 164 * Removes any options specifying which GC to use, for example "-XX:+UseG1GC". 165 * Removes any options matching: -XX:(+/-)Use*GC 166 * Used when a test need to set its own GC version. Then any 167 * GC specified by the framework must first be removed. 168 * @return A copy of given opts with all GC options removed. 169 */ 170 private static final Pattern useGcPattern = Pattern.compile( 171 "(?:\\-XX\\:[\\+\\-]Use.+GC)" 172 + "|(?:\\-Xconcgc)"); 173 public static List<String> removeGcOpts(List<String> opts) { 174 List<String> optsWithoutGC = new ArrayList<String>(); 175 for (String opt : opts) { 176 if (useGcPattern.matcher(opt).matches()) { 177 System.out.println("removeGcOpts: removed " + opt); 178 } else { 179 optsWithoutGC.add(opt); 180 } 181 } 182 return optsWithoutGC; 183 } 184 185 /** 186 * Splits a string by white space. 187 * Works like String.split(), but returns an empty array 188 * if the string is null or empty. 189 */ 190 private static String[] safeSplitString(String s) { 191 if (s == null || s.trim().isEmpty()) { 192 return new String[] {}; 193 } 194 return s.trim().split("\\s+"); 195 } 196 197 /** 198 * @return The full command line for the ProcessBuilder. 199 */ 200 public static String getCommandLine(ProcessBuilder pb) { 201 StringBuilder cmd = new StringBuilder(); 202 for (String s : pb.command()) { 203 cmd.append(s).append(" "); 204 } 205 return cmd.toString(); 206 } 207 208 /** 209 * Returns the free port on the local host. 210 * The function will spin until a valid port number is found. 211 * 212 * @return The port number 213 * @throws InterruptedException if any thread has interrupted the current thread 214 * @throws IOException if an I/O error occurs when opening the socket 215 */ 216 public static int getFreePort() throws InterruptedException, IOException { 217 int port = -1; 218 219 while (port <= 0) { 220 Thread.sleep(100); 221 222 ServerSocket serverSocket = null; 223 try { 224 serverSocket = new ServerSocket(0); 225 port = serverSocket.getLocalPort(); 226 } finally { 227 serverSocket.close(); 228 } 229 } 230 231 return port; 232 } 233 234 /** 235 * Returns the name of the local host. 236 * 237 * @return The host name 238 * @throws UnknownHostException if IP address of a host could not be determined 239 */ 240 public static String getHostname() throws UnknownHostException { 241 InetAddress inetAddress = InetAddress.getLocalHost(); 242 String hostName = inetAddress.getHostName(); 243 244 assertTrue((hostName != null && !hostName.isEmpty()), 245 "Cannot get hostname"); 246 247 return hostName; 248 } 249 250 /** 251 * Uses "jcmd -l" to search for a jvm pid. This function will wait 252 * forever (until jtreg timeout) for the pid to be found. 253 * @param key Regular expression to search for 254 * @return The found pid. 255 */ 256 public static int waitForJvmPid(String key) throws Throwable { 257 final long iterationSleepMillis = 250; 258 System.out.println("waitForJvmPid: Waiting for key '" + key + "'"); 259 System.out.flush(); 260 while (true) { 261 int pid = tryFindJvmPid(key); 262 if (pid >= 0) { 263 return pid; 264 } 265 Thread.sleep(iterationSleepMillis); 266 } 267 } 268 269 /** 270 * Searches for a jvm pid in the output from "jcmd -l". 271 * 272 * Example output from jcmd is: 273 * 12498 sun.tools.jcmd.JCmd -l 274 * 12254 /tmp/jdk8/tl/jdk/JTwork/classes/com/sun/tools/attach/Application.jar 275 * 276 * @param key A regular expression to search for. 277 * @return The found pid, or -1 if Enot found. 278 * @throws Exception If multiple matching jvms are found. 279 */ 280 public static int tryFindJvmPid(String key) throws Throwable { 281 OutputAnalyzer output = null; 282 try { 283 JDKToolLauncher jcmdLauncher = JDKToolLauncher.create("jcmd"); 284 jcmdLauncher.addToolArg("-l"); 285 output = ProcessTools.executeProcess(jcmdLauncher.getCommand()); 286 output.shouldHaveExitValue(0); 287 288 // Search for a line starting with numbers (pid), follwed by the key. 289 Pattern pattern = Pattern.compile("([0-9]+)\\s.*(" + key + ").*\\r?\\n"); 290 Matcher matcher = pattern.matcher(output.getStdout()); 291 292 int pid = -1; 293 if (matcher.find()) { 294 pid = Integer.parseInt(matcher.group(1)); 295 System.out.println("findJvmPid.pid: " + pid); 296 if (matcher.find()) { 297 throw new Exception("Found multiple JVM pids for key: " + key); 298 } 299 } 300 return pid; 301 } catch (Throwable t) { 302 System.out.println(String.format("Utils.findJvmPid(%s) failed: %s", key, t)); 303 throw t; 304 } 305 } 306 307 /** 308 * Returns file content as a list of strings 309 * 310 * @param file File to operate on 311 * @return List of strings 312 * @throws IOException 313 */ 314 public static List<String> fileAsList(File file) throws IOException { 315 assertTrue(file.exists() && file.isFile(), 316 file.getAbsolutePath() + " does not exist or not a file"); 317 List<String> output = new ArrayList<>(); 318 try (BufferedReader reader = new BufferedReader(new FileReader(file.getAbsolutePath()))) { 319 while (reader.ready()) { 320 output.add(reader.readLine().replace(NEW_LINE, "")); 321 } 322 } 323 return output; 324 } 325 326 /** 327 * Adjusts the provided timeout value for the TIMEOUT_FACTOR 328 * @param tOut the timeout value to be adjusted 329 * @return The timeout value adjusted for the value of "test.timeout.factor" 330 * system property 331 */ 332 public static long adjustTimeout(long tOut) { 333 return Math.round(tOut * Utils.TIMEOUT_FACTOR); 334 } 335 }