1 /* 2 * Copyright (c) 2024, 2025, 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 25 /* 26 * @test 27 * @summary "AOT" aliases for traditional CDS command-line options 28 * @requires vm.cds 29 * @requires vm.flagless 30 * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds/test-classes 31 * @build Hello 32 * @run driver jdk.test.lib.helpers.ClassFileInstaller -jar hello.jar Hello 33 * @run driver AOTFlags 34 */ 35 36 import java.io.File; 37 import jdk.test.lib.cds.CDSTestUtils; 38 import jdk.test.lib.helpers.ClassFileInstaller; 39 import jdk.test.lib.process.OutputAnalyzer; 40 import jdk.test.lib.process.ProcessTools; 41 42 public class AOTFlags { 43 static String appJar = ClassFileInstaller.getJarPath("hello.jar"); 44 static String aotConfigFile = "hello.aotconfig"; 45 static String aotCacheFile = "hello.aot"; 46 static String helloClass = "Hello"; 47 48 public static void main(String[] args) throws Exception { 49 positiveTests(); 50 negativeTests(); 51 } 52 53 static void positiveTests() throws Exception { 54 String hasTrainingDataPattern = "MethodTrainingData *= *[1-9]"; 55 String noTrainingDataPattern = "MethodTrainingData *= *0"; 56 String hasAOTCodePattern = "Shared file region .ac. .: *[1-9]"; 57 String noAOTCodePattern = "Shared file region .ac. .: *0"; 58 String hasMappedAOTCodePattern = "Mapped [0-9]+ bytes at address 0x[0-9a-f]+ from AOT Code Cache"; 59 60 //---------------------------------------------------------------------- 61 printTestCase("Training Run"); 62 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( 63 "-XX:AOTMode=record", 64 "-XX:AOTConfiguration=" + aotConfigFile, 65 "-Xlog:aot=debug", 66 "-cp", appJar, helloClass); 67 68 OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "train"); 69 out.shouldContain("Hello World"); 70 out.shouldContain("AOTConfiguration recorded: " + aotConfigFile); 71 out.shouldMatch(hasTrainingDataPattern); 72 out.shouldMatch(noAOTCodePattern); 73 out.shouldHaveExitValue(0); 74 75 //---------------------------------------------------------------------- 76 printTestCase("Assembly Phase (AOTClassLinking unspecified -> should be enabled by default)"); 77 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 78 "-XX:AOTMode=create", 79 "-XX:AOTConfiguration=" + aotConfigFile, 80 "-XX:AOTCache=" + aotCacheFile, 81 "-Xlog:aot", 82 "-cp", appJar); 83 out = CDSTestUtils.executeAndLog(pb, "asm"); 84 out.shouldContain("AOTCache creation is complete"); 85 out.shouldMatch("hello[.]aot"); 86 out.shouldMatch(hasTrainingDataPattern); 87 out.shouldMatch(hasAOTCodePattern); 88 out.shouldHaveExitValue(0); 89 90 //---------------------------------------------------------------------- 91 printTestCase("Production Run with AOTCache"); 92 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 93 "-XX:AOTCache=" + aotCacheFile, 94 "-Xlog:aot", 95 "-Xlog:aot+codecache*", 96 "-cp", appJar, helloClass); 97 out = CDSTestUtils.executeAndLog(pb, "prod"); 98 out.shouldContain("Using AOT-linked classes: true (static archive: has aot-linked classes)"); 99 out.shouldContain("Opened AOT cache hello.aot."); 100 out.shouldContain("Hello World"); 101 out.shouldMatch(hasMappedAOTCodePattern); 102 out.shouldHaveExitValue(0); 103 104 //---------------------------------------------------------------------- 105 printTestCase("AOTMode=off"); 106 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 107 "-XX:AOTCache=" + aotCacheFile, 108 "--show-version", 109 "-Xlog:aot", 110 "-XX:AOTMode=off", 111 "-cp", appJar, helloClass); 112 out = CDSTestUtils.executeAndLog(pb, "prod"); 113 out.shouldNotContain(", sharing"); 114 out.shouldNotContain("Opened AOT cache hello.aot."); 115 out.shouldContain("Hello World"); 116 out.shouldHaveExitValue(0); 117 118 //---------------------------------------------------------------------- 119 printTestCase("AOTMode=auto"); 120 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 121 "-XX:AOTCache=" + aotCacheFile, 122 "--show-version", 123 "-Xlog:aot", 124 "-XX:AOTMode=auto", 125 "-cp", appJar, helloClass); 126 out = CDSTestUtils.executeAndLog(pb, "prod"); 127 out.shouldContain(", sharing"); 128 out.shouldContain("Opened AOT cache hello.aot."); 129 out.shouldContain("Hello World"); 130 out.shouldHaveExitValue(0); 131 132 //---------------------------------------------------------------------- 133 printTestCase("AOTMode=on"); 134 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 135 "-XX:AOTCache=" + aotCacheFile, 136 "--show-version", 137 "-Xlog:aot", 138 "-XX:AOTMode=on", 139 "-cp", appJar, helloClass); 140 out = CDSTestUtils.executeAndLog(pb, "prod"); 141 out.shouldContain(", sharing"); 142 out.shouldContain("Opened AOT cache hello.aot."); 143 out.shouldContain("Hello World"); 144 out.shouldHaveExitValue(0); 145 146 //---------------------------------------------------------------------- 147 printTestCase("Assembly Phase with -XX:-AOTClassLinking"); 148 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 149 "-XX:AOTMode=create", 150 "-XX:-AOTClassLinking", 151 "-XX:AOTConfiguration=" + aotConfigFile, 152 "-XX:AOTCache=" + aotCacheFile, 153 "-Xlog:aot=debug", 154 "-cp", appJar); 155 out = CDSTestUtils.executeAndLog(pb, "asm"); 156 out.shouldContain("AOTCache creation is complete"); 157 out.shouldMatch("hello[.]aot"); 158 out.shouldMatch(noTrainingDataPattern); 159 out.shouldMatch(noAOTCodePattern); 160 out.shouldHaveExitValue(0); 161 162 //---------------------------------------------------------------------- 163 printTestCase("Production Run with AOTCache, which was created with -XX:-AOTClassLinking"); 164 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 165 "-XX:AOTCache=" + aotCacheFile, 166 "-Xlog:aot", 167 "-Xlog:aot+codecache*", 168 "-cp", appJar, helloClass); 169 out = CDSTestUtils.executeAndLog(pb, "prod"); 170 out.shouldContain("Using AOT-linked classes: false (static archive: no aot-linked classes)"); 171 out.shouldContain("Opened AOT cache hello.aot."); 172 out.shouldContain("Hello World"); 173 out.shouldNotMatch(hasMappedAOTCodePattern); 174 out.shouldHaveExitValue(0); 175 176 //---------------------------------------------------------------------- 177 printTestCase("Training run with -XX:-AOTClassLinking, but assembly run with -XX:+AOTClassLinking"); 178 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 179 "-XX:AOTMode=record", 180 "-XX:-AOTClassLinking", 181 "-XX:AOTConfiguration=" + aotConfigFile, 182 "-Xlog:aot=debug", 183 "-cp", appJar, helloClass); 184 out = CDSTestUtils.executeAndLog(pb, "train"); 185 out.shouldContain("Hello World"); 186 out.shouldContain("AOTConfiguration recorded: " + aotConfigFile); 187 out.shouldHaveExitValue(0); 188 189 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 190 "-XX:AOTMode=create", 191 "-XX:+AOTClassLinking", 192 "-XX:AOTConfiguration=" + aotConfigFile, 193 "-XX:AOTCache=" + aotCacheFile, 194 "-Xlog:aot=debug", 195 "-cp", appJar); 196 out = CDSTestUtils.executeAndLog(pb, "asm"); 197 out.shouldContain("AOTCache creation is complete"); 198 out.shouldMatch("hello[.]aot"); 199 out.shouldHaveExitValue(0); 200 201 //---------------------------------------------------------------------- 202 printTestCase("One step training run (JEP-514"); 203 204 // Set all AOTMode/AOTCacheOutput/AOTConfiguration 205 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 206 "-XX:AOTMode=record", 207 "-XX:AOTCacheOutput=" + aotCacheFile, 208 "-XX:AOTConfiguration=" + aotConfigFile, 209 "-Xlog:aot=debug", 210 "-cp", appJar, helloClass); 211 out = CDSTestUtils.executeAndLog(pb, "ontstep-train"); 212 out.shouldContain("Hello World"); 213 out.shouldContain("AOTConfiguration recorded: " + aotConfigFile); 214 out.shouldContain("AOTCache creation is complete: hello.aot"); 215 out.shouldHaveExitValue(0); 216 217 // Set AOTCacheOutput/AOTConfiguration only; Ergo for: AOTMode=record 218 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 219 "-XX:AOTCacheOutput=" + aotCacheFile, 220 "-XX:AOTConfiguration=" + aotConfigFile, 221 "-Xlog:aot=debug", 222 "-cp", appJar, helloClass); 223 out = CDSTestUtils.executeAndLog(pb, "ontstep-train"); 224 out.shouldContain("Hello World"); 225 out.shouldContain("AOTConfiguration recorded: " + aotConfigFile); 226 out.shouldContain("AOTCache creation is complete: hello.aot"); 227 out.shouldHaveExitValue(0); 228 229 // Set AOTCacheOutput only; Ergo for: AOTMode=record, AOTConfiguration=<temp> 230 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 231 "-XX:AOTCacheOutput=" + aotCacheFile, 232 "-Xlog:aot=debug", 233 "-cp", appJar, helloClass); 234 out = CDSTestUtils.executeAndLog(pb, "ontstep-train"); 235 out.shouldContain("Hello World"); 236 out.shouldContain("Temporary AOTConfiguration recorded: " + aotCacheFile + ".config"); 237 out.shouldContain("AOTCache creation is complete: hello.aot"); 238 out.shouldHaveExitValue(0); 239 240 // Quoating of space characters in child JVM process 241 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 242 "-XX:AOTCacheOutput=" + aotCacheFile, 243 "-Dmy.prop=My string -Xshare:off here", // -Xshare:off should not be treated as a single VM opt for the child JVM 244 "-Xlog:aot=debug", 245 "-cp", appJar, helloClass); 246 out = CDSTestUtils.executeAndLog(pb, "ontstep-train"); 247 out.shouldContain("Hello World"); 248 out.shouldContain("AOTCache creation is complete: hello.aot"); 249 out.shouldMatch("Picked up JAVA_TOOL_OPTIONS:.* -Dmy.prop=My' 'string' '-Xshare:off' 'here"); 250 out.shouldHaveExitValue(0); 251 252 // Training run with -XX:+PrintTieredEvents (see JDK-8362530). 253 printTestCase("Training run with -XX:+PrintTieredEvents"); 254 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 255 "-XX:AOTMode=record", 256 "-XX:+PrintTieredEvents", 257 "-XX:AOTConfiguration=" + aotConfigFile, 258 "-cp", appJar, helloClass); 259 out = CDSTestUtils.executeAndLog(pb, "train-with-tiered-events"); 260 out.shouldHaveExitValue(0); 261 } 262 263 static void negativeTests() throws Exception { 264 //---------------------------------------------------------------------- 265 printTestCase("Mixing old and new options"); 266 String mixOldNewErrSuffix = " cannot be used at the same time with -Xshare:on, -Xshare:auto, " 267 + "-Xshare:off, -Xshare:dump, DumpLoadedClassList, SharedClassListFile, " 268 + "or SharedArchiveFile"; 269 270 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( 271 "-Xshare:off", 272 "-XX:AOTConfiguration=" + aotConfigFile, 273 "-cp", appJar, helloClass); 274 275 OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "neg"); 276 out.shouldContain("Option AOTConfiguration" + mixOldNewErrSuffix); 277 out.shouldNotHaveExitValue(0); 278 279 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 280 "-XX:SharedArchiveFile=" + aotCacheFile, 281 "-XX:AOTCache=" + aotCacheFile, 282 "-cp", appJar, helloClass); 283 out = CDSTestUtils.executeAndLog(pb, "neg"); 284 out.shouldContain("Option AOTCache" + mixOldNewErrSuffix); 285 out.shouldNotHaveExitValue(0); 286 287 //---------------------------------------------------------------------- 288 printTestCase("Use AOTConfiguration without AOTMode/AOTCacheOutput"); 289 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 290 "-XX:AOTConfiguration=" + aotConfigFile, 291 "-cp", appJar, helloClass); 292 293 out = CDSTestUtils.executeAndLog(pb, "neg"); 294 out.shouldContain("AOTConfiguration can only be used with when AOTMode is record or create (selected AOTMode = auto)"); 295 out.shouldNotHaveExitValue(0); 296 297 //---------------------------------------------------------------------- 298 printTestCase("Use AOTConfiguration with AOTMode=on"); 299 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 300 "-XX:AOTMode=on", 301 "-XX:AOTConfiguration=" + aotConfigFile, 302 "-cp", appJar, helloClass); 303 304 out = CDSTestUtils.executeAndLog(pb, "neg"); 305 out.shouldContain("AOTConfiguration can only be used with when AOTMode is record or create (selected AOTMode = on)"); 306 out.shouldNotHaveExitValue(0); 307 308 //---------------------------------------------------------------------- 309 printTestCase("Use AOTMode without AOTCacheOutput or AOTConfiguration"); 310 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 311 "-XX:AOTMode=record", 312 "-cp", appJar, helloClass); 313 314 out = CDSTestUtils.executeAndLog(pb, "neg"); 315 out.shouldContain("At least one of AOTCacheOutput and AOTConfiguration must be specified when using -XX:AOTMode=record"); 316 317 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 318 "-XX:AOTMode=create", 319 "-cp", appJar, helloClass); 320 321 out = CDSTestUtils.executeAndLog(pb, "neg"); 322 out.shouldContain("AOTConfiguration must be specified when using -XX:AOTMode=create"); 323 out.shouldNotHaveExitValue(0); 324 325 //---------------------------------------------------------------------- 326 printTestCase("Bad AOTMode"); 327 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 328 "-XX:AOTMode=foo", 329 "-cp", appJar, helloClass); 330 331 out = CDSTestUtils.executeAndLog(pb, "neg"); 332 out.shouldContain("Unrecognized value foo for AOTMode. Must be one of the following: off, record, create, auto, on"); 333 out.shouldNotHaveExitValue(0); 334 335 //---------------------------------------------------------------------- 336 printTestCase("AOTCache specified with -XX:AOTMode=record"); 337 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 338 "-XX:AOTMode=record", 339 "-XX:AOTConfiguration=" + aotConfigFile, 340 "-XX:AOTCache=" + aotCacheFile, 341 "-cp", appJar, helloClass); 342 343 out = CDSTestUtils.executeAndLog(pb, "neg"); 344 out.shouldContain("AOTCache must not be specified when using -XX:AOTMode=record"); 345 out.shouldNotHaveExitValue(0); 346 347 //---------------------------------------------------------------------- 348 printTestCase("AOTCache/AOTCacheOutput not specified with -XX:AOTMode=create"); 349 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 350 "-XX:AOTMode=create", 351 "-XX:AOTConfiguration=" + aotConfigFile, 352 "-cp", appJar, helloClass); 353 354 out = CDSTestUtils.executeAndLog(pb, "neg"); 355 out.shouldContain("AOTCache or AOTCacheOutput must be specified when using -XX:AOTMode=create"); 356 out.shouldNotHaveExitValue(0); 357 358 //---------------------------------------------------------------------- 359 printTestCase("AOTCache and AOTCacheOutput have different values"); 360 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 361 "-XX:AOTMode=create", 362 "-XX:AOTConfiguration=" + aotConfigFile, 363 "-XX:AOTCache=aaa", 364 "-XX:AOTCacheOutput=aaa", 365 "-cp", appJar, helloClass); 366 367 out = CDSTestUtils.executeAndLog(pb, "neg"); 368 out.shouldContain("Only one of AOTCache or AOTCacheOutput can be specified"); 369 out.shouldNotHaveExitValue(0); 370 371 //---------------------------------------------------------------------- 372 printTestCase("No such config file"); 373 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 374 "-XX:AOTMode=create", 375 "-XX:AOTConfiguration=no-such-file", 376 "-XX:AOTCache=" + aotCacheFile, 377 "-cp", appJar, helloClass); 378 379 out = CDSTestUtils.executeAndLog(pb, "neg"); 380 out.shouldContain("Must be a valid AOT configuration generated by the current JVM: no-such-file"); 381 out.shouldNotHaveExitValue(0); 382 383 //---------------------------------------------------------------------- 384 printTestCase("AOTConfiguration file cannot be used as a CDS archive"); 385 386 // first make sure we have a valid aotConfigFile 387 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 388 "-XX:AOTMode=record", 389 "-XX:AOTConfiguration=" + aotConfigFile, 390 "-cp", appJar, helloClass); 391 392 out = CDSTestUtils.executeAndLog(pb, "train"); 393 out.shouldHaveExitValue(0); 394 395 // Cannot use this config file as a AOT cache 396 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 397 "-XX:AOTMode=on", 398 "-XX:AOTCache=" + aotConfigFile, 399 "-cp", appJar, helloClass); 400 401 out = CDSTestUtils.executeAndLog(pb, "neg"); 402 out.shouldContain("Not a valid AOT cache (hello.aotconfig)"); 403 out.shouldNotHaveExitValue(0); 404 405 // Cannot use this config file as a CDS archive 406 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 407 "-Xshare:on", 408 "-XX:SharedArchiveFile=" + aotConfigFile, 409 "-cp", appJar, helloClass); 410 411 out = CDSTestUtils.executeAndLog(pb, "neg"); 412 out.shouldContain("Not a valid shared archive file (hello.aotconfig)"); 413 out.shouldNotHaveExitValue(0); 414 415 //---------------------------------------------------------------------- 416 printTestCase("Classpath mismatch when creating archive"); 417 418 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 419 "-XX:AOTMode=create", 420 "-XX:AOTConfiguration=" + aotConfigFile, 421 "-XX:AOTCache=" + aotCacheFile, 422 "-cp", "noSuchJar.jar"); 423 424 out = CDSTestUtils.executeAndLog(pb, "neg"); 425 out.shouldContain("class path and/or module path are not compatible with the ones " + 426 "specified when the AOTConfiguration file was recorded"); 427 out.shouldContain("Unable to use create AOT cache"); 428 out.shouldHaveExitValue(1); 429 430 //---------------------------------------------------------------------- 431 printTestCase("Cannot use multiple paths in AOTConfiguration"); 432 433 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 434 "-XX:AOTMode=record", 435 "-XX:AOTConfiguration=" + aotConfigFile + File.pathSeparator + "dummy", 436 "-cp", "noSuchJar.jar"); 437 438 out = CDSTestUtils.executeAndLog(pb, "neg"); 439 out.shouldContain("Option AOTConfiguration must specify a single file name"); 440 out.shouldHaveExitValue(1); 441 442 //---------------------------------------------------------------------- 443 printTestCase("Cannot use multiple paths in AOTCache"); 444 445 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 446 "-XX:AOTMode=create", 447 "-XX:AOTConfiguration=" + aotConfigFile, 448 "-XX:AOTCache=" + aotCacheFile + File.pathSeparator + "dummy", 449 "-cp", "noSuchJar.jar"); 450 451 out = CDSTestUtils.executeAndLog(pb, "neg"); 452 out.shouldContain("Option AOTCache must specify a single file name"); 453 out.shouldHaveExitValue(1); 454 455 //---------------------------------------------------------------------- 456 printTestCase("Cannot use a dynamic CDS archive for -XX:AOTCache"); 457 String staticArchive = "static.jsa"; 458 String dynamicArchive = "dynamic.jsa"; 459 460 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 461 "-Xshare:dump", 462 "-XX:SharedArchiveFile=" + staticArchive); 463 out = CDSTestUtils.executeAndLog(pb, "static"); 464 out.shouldHaveExitValue(0); 465 466 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 467 "-XX:SharedArchiveFile=" + staticArchive, 468 "-XX:ArchiveClassesAtExit=" + dynamicArchive, 469 "--version"); 470 out = CDSTestUtils.executeAndLog(pb, "dynamic"); 471 out.shouldHaveExitValue(0); 472 473 pb = ProcessTools.createLimitedTestJavaProcessBuilder( 474 "-Xlog:aot", 475 "-XX:AOTMode=on", 476 "-XX:AOTCache=" + dynamicArchive, 477 "--version"); 478 479 out = CDSTestUtils.executeAndLog(pb, "neg"); 480 out.shouldContain("Unable to use AOT cache."); 481 out.shouldContain("Not a valid AOT cache (dynamic.jsa)"); 482 out.shouldHaveExitValue(1); 483 484 //---------------------------------------------------------------------- 485 testEmptyValue("AOTCache"); 486 testEmptyValue("AOTConfiguration"); 487 testEmptyValue("AOTMode"); 488 testEmptyValue("AOTCacheOutput"); 489 } 490 491 static void testEmptyValue(String option) throws Exception { 492 printTestCase("Empty values for " + option); 493 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( 494 "-XX:" + option + "=", "--version"); 495 OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "neg"); 496 out.shouldContain("Improperly specified VM option '" + option + "='"); 497 out.shouldHaveExitValue(1); 498 } 499 500 static int testNum = 0; 501 static void printTestCase(String s) { 502 System.out.println("vvvvvvv TEST CASE " + testNum + ": " + s + ": starts here vvvvvvv"); 503 testNum++; 504 } 505 }