1 /* 2 * Copyright (c) 2017, 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 package compiler.valhalla.valuetypes; 25 26 import compiler.whitebox.CompilerWhiteBoxTest; 27 import jdk.test.lib.Asserts; 28 import jdk.test.lib.management.InputArguments; 29 import jdk.test.lib.Platform; 30 import jdk.test.lib.process.ProcessTools; 31 import jdk.test.lib.process.OutputAnalyzer; 32 import jdk.test.lib.Utils; 33 import sun.hotspot.WhiteBox; 34 35 import java.lang.annotation.Retention; 36 import java.lang.annotation.RetentionPolicy; 37 import java.lang.annotation.Repeatable; 38 import java.lang.invoke.*; 39 import java.lang.reflect.Method; 40 import java.util.ArrayList; 41 import java.util.Arrays; 42 import java.util.Hashtable; 43 import java.util.LinkedHashMap; 44 import java.util.List; 45 import java.util.Map; 46 import java.util.regex.Matcher; 47 import java.util.regex.Pattern; 48 import java.util.TreeMap; 49 50 // Mark method as test 51 @Retention(RetentionPolicy.RUNTIME) 52 @Repeatable(Tests.class) 53 @interface Test { 54 // Regular expression used to match forbidden IR nodes 55 // in the C2 IR emitted for this test. 56 String failOn() default ""; 57 // Regular expressions used to match and count IR nodes. 58 String[] match() default { }; 59 int[] matchCount() default { }; 60 int valid() default ValueTypeTest.AllFlags; 61 } 62 63 @Retention(RetentionPolicy.RUNTIME) 64 @interface Tests { 65 Test[] value(); 66 } 67 68 // Force method inlining during compilation 69 @Retention(RetentionPolicy.RUNTIME) 70 @interface ForceInline { } 71 72 // Prevent method inlining during compilation 73 @Retention(RetentionPolicy.RUNTIME) 74 @interface DontInline { } 75 76 // Prevent method compilation 77 @Retention(RetentionPolicy.RUNTIME) 78 @interface DontCompile { } 79 80 // Number of warmup iterations 81 @Retention(RetentionPolicy.RUNTIME) 82 @interface Warmup { 83 int value(); 84 } 85 86 public abstract class ValueTypeTest { 87 // Random test values 88 public static final int rI = Utils.getRandomInstance().nextInt() % 1000; 89 public static final long rL = Utils.getRandomInstance().nextLong() % 1000; 90 91 // User defined settings 92 private static final boolean PRINT_GRAPH = true; 93 private static final boolean PRINT_TIMES = Boolean.parseBoolean(System.getProperty("PrintTimes", "false")); 94 private static boolean VERIFY_IR = Boolean.parseBoolean(System.getProperty("VerifyIR", "true")); 95 private static final boolean VERIFY_VM = Boolean.parseBoolean(System.getProperty("VerifyVM", "false")); 96 private static final String SCENARIOS = System.getProperty("Scenarios", ""); 97 private static final String TESTLIST = System.getProperty("Testlist", ""); 98 private static final String EXCLUDELIST = System.getProperty("Exclude", ""); 99 private static final int WARMUP = Integer.parseInt(System.getProperty("Warmup", "251")); 100 private static final boolean DUMP_REPLAY = Boolean.parseBoolean(System.getProperty("DumpReplay", "false")); 101 102 // Pre-defined settings 103 private static final List<String> defaultFlags = Arrays.asList( 104 "-XX:-BackgroundCompilation", "-XX:CICompilerCount=1", 105 "-XX:+PrintCompilation", "-XX:+PrintIdeal", "-XX:+PrintOptoAssembly", 106 "-XX:CompileCommand=quiet", 107 "-XX:CompileCommand=compileonly,java.lang.invoke.*::*", 108 "-XX:CompileCommand=compileonly,java.lang.Long::sum", 109 "-XX:CompileCommand=compileonly,java.lang.Object::<init>", 110 "-XX:CompileCommand=compileonly,compiler.valhalla.valuetypes.*::*"); 111 private static final List<String> verifyFlags = Arrays.asList( 112 "-XX:+VerifyOops", "-XX:+VerifyStack", "-XX:+VerifyLastFrame", "-XX:+VerifyBeforeGC", "-XX:+VerifyAfterGC", 113 "-XX:+VerifyDuringGC", "-XX:+VerifyAdapterSharing", "-XX:+StressValueTypeReturnedAsFields"); 114 115 protected static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 116 protected static final int ValueTypePassFieldsAsArgsOn = 0x1; 117 protected static final int ValueTypePassFieldsAsArgsOff = 0x2; 118 protected static final int ValueTypeArrayFlattenOn = 0x4; 119 protected static final int ValueTypeArrayFlattenOff = 0x8; 120 protected static final int ValueTypeReturnedAsFieldsOn = 0x10; 121 protected static final int ValueTypeReturnedAsFieldsOff = 0x20; 122 static final int AllFlags = ValueTypePassFieldsAsArgsOn | ValueTypePassFieldsAsArgsOff | ValueTypeArrayFlattenOn | ValueTypeArrayFlattenOff | ValueTypeReturnedAsFieldsOn; 123 protected static final boolean ValueTypePassFieldsAsArgs = (Boolean)WHITE_BOX.getVMFlag("ValueTypePassFieldsAsArgs"); 124 protected static final boolean ValueTypeArrayFlatten = (Boolean)WHITE_BOX.getVMFlag("ValueArrayFlatten"); 125 protected static final boolean ValueTypeReturnedAsFields = (Boolean)WHITE_BOX.getVMFlag("ValueTypeReturnedAsFields"); 126 protected static final boolean NullableValueTypes = (Boolean)WHITE_BOX.getVMFlag("NullableValueTypes"); 127 protected static final int COMP_LEVEL_ANY = -2; 128 protected static final int COMP_LEVEL_FULL_OPTIMIZATION = 4; 129 protected static final Hashtable<String, Method> tests = new Hashtable<String, Method>(); 130 protected static final boolean USE_COMPILER = WHITE_BOX.getBooleanVMFlag("UseCompiler"); 131 protected static final boolean PRINT_IDEAL = WHITE_BOX.getBooleanVMFlag("PrintIdeal"); 132 protected static final boolean XCOMP = Platform.isComp(); 133 134 // Regular expressions used to match nodes in the PrintIdeal output 135 protected static final String START = "(\\d+\\t(.*"; 136 protected static final String MID = ".*)+\\t===.*"; 137 protected static final String END = ")|"; 138 protected static final String ALLOC = "(.*precise klass compiler/valhalla/valuetypes/MyValue.*\\R(.*(nop|spill).*\\R)*.*_new_instance_Java" + END; 139 protected static final String ALLOCA = "(.*precise klass \\[Lcompiler/valhalla/valuetypes/MyValue.*\\R(.*(nop|spill).*\\R)*.*_new_array_Java" + END; 140 protected static final String LOAD = START + "Load(B|S|I|L|F|D|P|N)" + MID + "@compiler/valhalla/valuetypes/MyValue.*" + END; 141 protected static final String LOADK = START + "LoadK" + MID + END; 142 protected static final String STORE = START + "Store(B|S|I|L|F|D|P|N)" + MID + "@compiler/valhalla/valuetypes/MyValue.*" + END; 143 protected static final String LOOP = START + "Loop" + MID + "" + END; 144 protected static final String TRAP = START + "CallStaticJava" + MID + "uncommon_trap.*(unstable_if|predicate)" + END; 145 protected static final String RETURN = START + "Return" + MID + "returns" + END; 146 protected static final String LINKTOSTATIC = START + "CallStaticJava" + MID + "linkToStatic" + END; 147 protected static final String NPE = START + "CallStaticJava" + MID + "null_check" + END; 148 protected static final String CALL = START + "CallStaticJava" + MID + END; 149 protected static final String STOREVALUETYPEFIELDS = START + "CallStaticJava" + MID + "store_value_type_fields" + END; 150 protected static final String SCOBJ = "(.*# ScObj.*" + END; 151 152 public static String[] concat(String prefix[], String... extra) { 153 ArrayList<String> list = new ArrayList<String>(); 154 if (prefix != null) { 155 for (String s : prefix) { 156 list.add(s); 157 } 158 } 159 if (extra != null) { 160 for (String s : extra) { 161 list.add(s); 162 } 163 } 164 165 return list.toArray(new String[list.size()]); 166 } 167 168 /** 169 * Override getNumScenarios and getVMParameters if you want to run with more than 170 * the 5 built-in scenarios 171 */ 172 public int getNumScenarios() { 173 return 5; 174 } 175 176 /** 177 * VM paramaters for the 5 built-in test scenarios. If your test needs to append 178 * extra parameters for (some of) these scenarios, override getExtraVMParameters(). 179 */ 180 public String[] getVMParameters(int scenario) { 181 switch (scenario) { 182 case 0: return new String[] { 183 "-XX:+AlwaysIncrementalInline", 184 "-XX:ValueArrayElemMaxFlatOops=-1", 185 "-XX:ValueArrayElemMaxFlatSize=-1", 186 "-XX:+ValueArrayFlatten", 187 "-XX:ValueFieldMaxFlatSize=-1", 188 "-XX:+ValueTypePassFieldsAsArgs", 189 "-XX:+ValueTypeReturnedAsFields"}; 190 case 1: return new String[] { 191 "-XX:-UseCompressedOops", 192 "-XX:ValueArrayElemMaxFlatOops=-1", 193 "-XX:ValueArrayElemMaxFlatSize=-1", 194 "-XX:+ValueArrayFlatten", 195 "-XX:ValueFieldMaxFlatSize=-1", 196 "-XX:-ValueTypePassFieldsAsArgs", 197 "-XX:-ValueTypeReturnedAsFields"}; 198 case 2: return new String[] { 199 "-DVerifyIR=false", 200 "-XX:-UseCompressedOops", 201 "-XX:ValueArrayElemMaxFlatOops=0", 202 "-XX:ValueArrayElemMaxFlatSize=0", 203 "-XX:-ValueArrayFlatten", 204 "-XX:ValueFieldMaxFlatSize=0", 205 "-XX:+ValueTypePassFieldsAsArgs", 206 "-XX:+ValueTypeReturnedAsFields"}; 207 case 3: return new String[] { 208 "-DVerifyIR=false", 209 "-XX:+AlwaysIncrementalInline", 210 "-XX:ValueArrayElemMaxFlatOops=0", 211 "-XX:ValueArrayElemMaxFlatSize=0", 212 "-XX:ValueFieldMaxFlatSize=0", 213 "-XX:-ValueTypePassFieldsAsArgs", 214 "-XX:-ValueTypeReturnedAsFields"}; 215 case 4: return new String[] { 216 "-DVerifyIR=false", 217 "-XX:ValueArrayElemMaxFlatOops=-1", 218 "-XX:ValueArrayElemMaxFlatSize=-1", 219 "-XX:+ValueArrayFlatten", 220 "-XX:ValueFieldMaxFlatSize=0", 221 "-XX:+ValueTypePassFieldsAsArgs", 222 "-XX:-ValueTypeReturnedAsFields"}; 223 } 224 225 return null; 226 } 227 228 /** 229 * Override this method to provide extra parameters for selected scenarios 230 */ 231 public String[] getExtraVMParameters(int scenario) { 232 return null; 233 } 234 235 public static void main(String[] args) throws Throwable { 236 if (args.length != 1) { 237 throw new RuntimeException("Usage: @run main/othervm/timeout=120 -Xbootclasspath/a:. -ea" + 238 " -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions" + 239 " -XX:+UnlockExperimentalVMOptions -XX:+WhiteBoxAPI -XX:+EnableValhalla" + 240 " compiler.valhalla.valuetypes.ValueTypeTest <YourTestMainClass>"); 241 } 242 String testMainClassName = args[0]; 243 Class testMainClass = Class.forName(testMainClassName); 244 ValueTypeTest test = (ValueTypeTest)testMainClass.newInstance(); 245 List<String> scenarios = null; 246 if (!SCENARIOS.isEmpty()) { 247 scenarios = Arrays.asList(SCENARIOS.split(",")); 248 } 249 for (int i=0; i<test.getNumScenarios(); i++) { 250 if (scenarios == null || scenarios.contains(Integer.toString(i))) { 251 System.out.println("Scenario #" + i + " -------- "); 252 String[] cmds = InputArguments.getVmInputArgs(); 253 cmds = concat(cmds, test.getVMParameters(i)); 254 cmds = concat(cmds, test.getExtraVMParameters(i)); 255 cmds = concat(cmds, testMainClassName); 256 257 OutputAnalyzer oa = ProcessTools.executeTestJvm(cmds); 258 String output = oa.getOutput(); 259 oa.shouldHaveExitValue(0); 260 System.out.println(output); 261 } else { 262 System.out.println("Scenario #" + i + " is skipped due to -Dscenarios=" + SCENARIOS); 263 } 264 } 265 } 266 267 protected ValueTypeTest() { 268 List<String> list = null; 269 List<String> exclude = null; 270 if (!TESTLIST.isEmpty()) { 271 list = Arrays.asList(TESTLIST.split(",")); 272 } 273 if (!EXCLUDELIST.isEmpty()) { 274 exclude = Arrays.asList(EXCLUDELIST.split(",")); 275 } 276 // Gather all test methods and put them in Hashtable 277 for (Method m : getClass().getDeclaredMethods()) { 278 Test[] annos = m.getAnnotationsByType(Test.class); 279 if (annos.length != 0 && 280 ((list == null || list.contains(m.getName())) && (exclude == null || !exclude.contains(m.getName())))) { 281 tests.put(getClass().getSimpleName() + "::" + m.getName(), m); 282 } 283 } 284 } 285 286 protected void run(String[] args, Class<?>... classes) throws Throwable { 287 if (args.length == 0) { 288 // Spawn a new VM instance 289 execute_vm(); 290 } else { 291 // Execute tests 292 run(classes); 293 } 294 } 295 296 private void execute_vm() throws Throwable { 297 Asserts.assertFalse(tests.isEmpty(), "no tests to execute"); 298 ArrayList<String> args = new ArrayList<String>(defaultFlags); 299 String[] vmInputArgs = InputArguments.getVmInputArgs(); 300 if (VERIFY_IR) { 301 for (String arg : vmInputArgs) { 302 if (arg.startsWith("-XX:CompileThreshold")) { 303 // Disable IR verification if 304 VERIFY_IR = false; 305 } 306 // Check if the JVM supports value type specific default arguments from the test's run commands 307 if (arg.startsWith("-XX:+ValueTypePassFieldsAsArgs") || 308 arg.startsWith("-XX:+ValueTypeReturnedAsFields")) { 309 Boolean value = (Boolean)WHITE_BOX.getVMFlag(arg.substring(5)); 310 if (!value) { 311 System.out.println("WARNING: could not enable " + arg.substring(5) + ". Skipping IR verification."); 312 VERIFY_IR = false; 313 } 314 } else if (arg.startsWith("-XX:-ValueTypePassFieldsAsArgs") || 315 arg.startsWith("-XX:-ValueTypeReturnedAsFields")) { 316 Boolean value = (Boolean)WHITE_BOX.getVMFlag(arg.substring(5)); 317 if (value) { 318 System.out.println("WARNING: could not disable " + arg.substring(5) + ". Skipping IR verification."); 319 VERIFY_IR = false; 320 } 321 } 322 } 323 // Always trap for exception throwing to not confuse IR verification 324 args.add("-XX:-OmitStackTraceInFastThrow"); 325 } 326 if (VERIFY_VM) { 327 args.addAll(verifyFlags); 328 } 329 // Run tests in own process and verify output 330 args.add(getClass().getName()); 331 args.add("run"); 332 // Spawn process with default JVM options from the test's run command 333 String[] cmds = Arrays.copyOf(vmInputArgs, vmInputArgs.length + args.size()); 334 System.arraycopy(args.toArray(), 0, cmds, vmInputArgs.length, args.size()); 335 OutputAnalyzer oa = ProcessTools.executeTestJvm(cmds); 336 // If ideal graph printing is enabled/supported, verify output 337 String output = oa.getOutput(); 338 oa.shouldHaveExitValue(0); 339 if (VERIFY_IR) { 340 if (output.contains("PrintIdeal enabled")) { 341 parseOutput(output); 342 } else { 343 System.out.println(output); 344 System.out.println("WARNING: IR verification failed! Running with -Xint, -Xcomp or release build?"); 345 } 346 } 347 } 348 349 private void parseOutput(String output) throws Exception { 350 Pattern comp_re = Pattern.compile("\\n\\s+\\d+\\s+\\d+\\s+(%| )(s| )(!| )b(n| )\\s+\\S+\\.(?<name>[^.]+::\\S+)\\s+(?<osr>@ \\d+\\s+)?[(]\\d+ bytes[)]\\n"); 351 Matcher m = comp_re.matcher(output); 352 Map<String,String> compilations = new LinkedHashMap<>(); 353 int prev = 0; 354 String methodName = null; 355 while (m.find()) { 356 if (prev == 0) { 357 // Print header 358 System.out.print(output.substring(0, m.start()+1)); 359 } else if (methodName != null) { 360 compilations.put(methodName, output.substring(prev, m.start()+1)); 361 } 362 if (m.group("osr") != null) { 363 methodName = null; 364 } else { 365 methodName = m.group("name"); 366 } 367 prev = m.end(); 368 } 369 if (prev == 0) { 370 // Print header 371 System.out.print(output); 372 } else if (methodName != null) { 373 compilations.put(methodName, output.substring(prev)); 374 } 375 // Iterate over compilation output 376 for (String testName : compilations.keySet()) { 377 Method test = tests.get(testName); 378 if (test == null) { 379 // Skip helper methods 380 continue; 381 } 382 String graph = compilations.get(testName); 383 if (PRINT_GRAPH) { 384 System.out.println("\nGraph for " + testName + "\n" + graph); 385 } 386 // Parse graph using regular expressions to determine if it contains forbidden nodes 387 Test[] annos = test.getAnnotationsByType(Test.class); 388 Test anno = null; 389 for (Test a : annos) { 390 if ((a.valid() & ValueTypePassFieldsAsArgsOn) != 0 && ValueTypePassFieldsAsArgs) { 391 assert anno == null; 392 anno = a; 393 } else if ((a.valid() & ValueTypePassFieldsAsArgsOff) != 0 && !ValueTypePassFieldsAsArgs) { 394 assert anno == null; 395 anno = a; 396 } else if ((a.valid() & ValueTypeArrayFlattenOn) != 0 && ValueTypeArrayFlatten) { 397 assert anno == null; 398 anno = a; 399 } else if ((a.valid() & ValueTypeArrayFlattenOff) != 0 && !ValueTypeArrayFlatten) { 400 assert anno == null; 401 anno = a; 402 } else if ((a.valid() & ValueTypeReturnedAsFieldsOn) != 0 && ValueTypeReturnedAsFields) { 403 assert anno == null; 404 anno = a; 405 } else if ((a.valid() & ValueTypeReturnedAsFieldsOff) != 0 && !ValueTypeReturnedAsFields) { 406 assert anno == null; 407 anno = a; 408 } 409 } 410 assert anno != null; 411 String regexFail = anno.failOn(); 412 if (!regexFail.isEmpty()) { 413 Pattern pattern = Pattern.compile(regexFail.substring(0, regexFail.length()-1)); 414 Matcher matcher = pattern.matcher(graph); 415 boolean found = matcher.find(); 416 Asserts.assertFalse(found, "Graph for '" + testName + "' contains forbidden node:\n" + (found ? matcher.group() : "")); 417 } 418 String[] regexMatch = anno.match(); 419 int[] matchCount = anno.matchCount(); 420 for (int i = 0; i < regexMatch.length; ++i) { 421 Pattern pattern = Pattern.compile(regexMatch[i].substring(0, regexMatch[i].length()-1)); 422 Matcher matcher = pattern.matcher(graph); 423 int count = 0; 424 String nodes = ""; 425 while (matcher.find()) { 426 count++; 427 nodes += matcher.group() + "\n"; 428 } 429 if (matchCount[i] < 0) { 430 Asserts.assertLTE(Math.abs(matchCount[i]), count, "Graph for '" + testName + "' contains different number of match nodes:\n" + nodes); 431 } else { 432 Asserts.assertEQ(matchCount[i], count, "Graph for '" + testName + "' contains different number of match nodes:\n" + nodes); 433 } 434 } 435 tests.remove(testName); 436 System.out.println(testName + " passed"); 437 } 438 // Check if all tests were compiled 439 if (tests.size() != 0) { 440 for (String name : tests.keySet()) { 441 System.out.println("Test '" + name + "' not compiled!"); 442 } 443 throw new RuntimeException("Not all tests were compiled"); 444 } 445 } 446 447 private void setup(Class<?> clazz) { 448 if (XCOMP) { 449 // Don't control compilation if -Xcomp is enabled 450 return; 451 } 452 if (DUMP_REPLAY) { 453 // Generate replay compilation files 454 String directive = "[{ match: \"*.*\", DumpReplay: true }]"; 455 if (WHITE_BOX.addCompilerDirective(directive) != 1) { 456 throw new RuntimeException("Failed to add compiler directive"); 457 } 458 } 459 460 Method[] methods = clazz.getDeclaredMethods(); 461 for (Method m : methods) { 462 if (m.isAnnotationPresent(Test.class)) { 463 // Don't inline tests 464 WHITE_BOX.testSetDontInlineMethod(m, true); 465 } 466 if (m.isAnnotationPresent(DontCompile.class)) { 467 WHITE_BOX.makeMethodNotCompilable(m, COMP_LEVEL_ANY, true); 468 WHITE_BOX.makeMethodNotCompilable(m, COMP_LEVEL_ANY, false); 469 WHITE_BOX.testSetDontInlineMethod(m, true); 470 } 471 if (m.isAnnotationPresent(ForceInline.class)) { 472 WHITE_BOX.testSetForceInlineMethod(m, true); 473 } else if (m.isAnnotationPresent(DontInline.class)) { 474 WHITE_BOX.testSetDontInlineMethod(m, true); 475 } 476 } 477 478 // Compile class initializers 479 WHITE_BOX.enqueueInitializerForCompilation(clazz, COMP_LEVEL_FULL_OPTIMIZATION); 480 } 481 482 private void run(Class<?>... classes) throws Exception { 483 if (USE_COMPILER && PRINT_IDEAL && !XCOMP) { 484 System.out.println("PrintIdeal enabled"); 485 } 486 System.out.format("rI = %d, rL = %d\n", rI, rL); 487 488 setup(getClass()); 489 for (Class<?> clazz : classes) { 490 setup(clazz); 491 } 492 493 // Execute tests 494 TreeMap<Long, String> durations = PRINT_TIMES ? new TreeMap<Long, String>() : null; 495 for (Method test : tests.values()) { 496 long startTime = System.nanoTime(); 497 Method verifier = getClass().getMethod(test.getName() + "_verifier", boolean.class); 498 // Warmup using verifier method 499 Warmup anno = test.getAnnotation(Warmup.class); 500 int warmup = anno == null ? WARMUP : anno.value(); 501 for (int i = 0; i < warmup; ++i) { 502 verifier.invoke(this, true); 503 } 504 // Trigger compilation 505 WHITE_BOX.enqueueMethodForCompilation(test, COMP_LEVEL_FULL_OPTIMIZATION); 506 Asserts.assertTrue(!USE_COMPILER || WHITE_BOX.isMethodCompiled(test, false), test + " not compiled"); 507 // Check result 508 verifier.invoke(this, false); 509 if (PRINT_TIMES) { 510 long endTime = System.nanoTime(); 511 long duration = (endTime - startTime); 512 durations.put(duration, test.getName()); 513 } 514 } 515 516 // Print execution times 517 if (PRINT_TIMES) { 518 System.out.println("\n\nTest execution times:"); 519 for (Map.Entry<Long, String> entry : durations.entrySet()) { 520 System.out.format("%-10s%15d ns\n", entry.getValue() + ":", entry.getKey()); 521 } 522 } 523 } 524 }