1 /* 2 * Copyright (c) 2016, 2023, 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 requires; 25 26 import java.io.BufferedInputStream; 27 import java.io.FileInputStream; 28 import java.io.IOException; 29 import java.io.InputStream; 30 import java.io.File; 31 import java.nio.charset.Charset; 32 import java.nio.file.Files; 33 import java.nio.file.Path; 34 import java.nio.file.Paths; 35 import java.nio.file.StandardOpenOption; 36 import java.time.Instant; 37 import java.util.ArrayList; 38 import java.util.Collections; 39 import java.util.HashMap; 40 import java.util.List; 41 import java.util.Map; 42 import java.util.Properties; 43 import java.util.Set; 44 import java.util.concurrent.Callable; 45 import java.util.concurrent.TimeUnit; 46 import java.util.function.Predicate; 47 import java.util.function.Supplier; 48 import java.util.regex.Matcher; 49 import java.util.regex.Pattern; 50 import java.util.stream.Collectors; 51 import java.util.stream.Stream; 52 53 import jdk.internal.foreign.CABI; 54 import jdk.test.whitebox.code.Compiler; 55 import jdk.test.whitebox.cpuinfo.CPUInfo; 56 import jdk.test.whitebox.gc.GC; 57 import jdk.test.whitebox.WhiteBox; 58 import jdk.test.lib.Platform; 59 import jdk.test.lib.Container; 60 61 /** 62 * The Class to be invoked by jtreg prior Test Suite execution to 63 * collect information about VM. 64 * Do not use any APIs that may not be available in all target VMs. 65 * Properties set by this Class will be available in the @requires expressions. 66 */ 67 public class VMProps implements Callable<Map<String, String>> { 68 // value known to jtreg as an indicator of error state 69 private static final String ERROR_STATE = "__ERROR__"; 70 71 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 72 73 private static class SafeMap { 74 private final Map<String, String> map = new HashMap<>(); 75 76 public void put(String key, Supplier<String> s) { 77 String value; 78 try { 79 value = s.get(); 80 } catch (Throwable t) { 81 System.err.println("failed to get value for " + key); 82 t.printStackTrace(System.err); 83 value = ERROR_STATE + t; 84 } 85 map.put(key, value); 86 } 87 88 public void putAll(Map<String, String> map) { 89 map.entrySet().forEach(e -> put(e.getKey(), () -> e.getValue())); 90 } 91 } 92 93 /** 94 * Collects information about VM properties. 95 * This method will be invoked by jtreg. 96 * 97 * @return Map of property-value pairs. 98 */ 99 @Override 100 public Map<String, String> call() { 101 log("Entering call()"); 102 SafeMap map = new SafeMap(); 103 map.put("vm.flavor", this::vmFlavor); 104 map.put("vm.compMode", this::vmCompMode); 105 map.put("vm.bits", this::vmBits); 106 map.put("vm.flightRecorder", this::vmFlightRecorder); 107 map.put("vm.simpleArch", this::vmArch); 108 map.put("vm.debug", this::vmDebug); 109 map.put("vm.jvmci", this::vmJvmci); 110 map.put("vm.jvmci.enabled", this::vmJvmciEnabled); 111 map.put("vm.emulatedClient", this::vmEmulatedClient); 112 // vm.hasSA is "true" if the VM contains the serviceability agent 113 // and jhsdb. 114 map.put("vm.hasSA", this::vmHasSA); 115 // vm.hasJFR is "true" if JFR is included in the build of the VM and 116 // so tests can be executed. 117 map.put("vm.hasJFR", this::vmHasJFR); 118 map.put("vm.hasDTrace", this::vmHasDTrace); 119 map.put("vm.jvmti", this::vmHasJVMTI); 120 map.put("vm.cpu.features", this::cpuFeatures); 121 map.put("vm.pageSize", this::vmPageSize); 122 map.put("vm.rtm.cpu", this::vmRTMCPU); 123 map.put("vm.rtm.compiler", this::vmRTMCompiler); 124 // vm.cds is true if the VM is compiled with cds support. 125 map.put("vm.cds", this::vmCDS); 126 map.put("vm.cds.custom.loaders", this::vmCDSForCustomLoaders); 127 map.put("vm.cds.write.archived.java.heap", this::vmCDSCanWriteArchivedJavaHeap); 128 map.put("vm.continuations", this::vmContinuations); 129 // vm.graal.enabled is true if Graal is used as JIT 130 map.put("vm.graal.enabled", this::isGraalEnabled); 131 // jdk.hasLibgraal is true if the libgraal shared library file is present 132 map.put("jdk.hasLibgraal", this::hasLibgraal); 133 // vm.libgraal.enabled is true if libgraal is used as JIT 134 map.put("vm.libgraal.enabled", this::isLibgraalEnabled); 135 map.put("vm.compiler1.enabled", this::isCompiler1Enabled); 136 map.put("vm.compiler2.enabled", this::isCompiler2Enabled); 137 map.put("docker.support", this::dockerSupport); 138 map.put("vm.musl", this::isMusl); 139 map.put("release.implementor", this::implementor); 140 map.put("jdk.containerized", this::jdkContainerized); 141 map.put("vm.flagless", this::isFlagless); 142 map.put("jdk.foreign.linker", this::jdkForeignLinker); 143 map.putAll(xOptFlags()); // -Xmx4g -> @requires vm.opt.x.Xmx == "4g" ) 144 vmGC(map); // vm.gc.X = true/false 145 vmGCforCDS(map); // may set vm.gc 146 vmOptFinalFlags(map); 147 148 dump(map.map); 149 log("Leaving call()"); 150 return map.map; 151 } 152 153 /** 154 * Print a stack trace before returning error state; 155 * Used by the various helper functions which parse information from 156 * VM properties in the case where they don't find an expected property 157 * or a property doesn't conform to an expected format. 158 * 159 * @return {@link #ERROR_STATE} 160 */ 161 private String errorWithMessage(String message) { 162 new Exception(message).printStackTrace(); 163 return ERROR_STATE + message; 164 } 165 166 /** 167 * @return vm.simpleArch value of "os.simpleArch" property of tested JDK. 168 */ 169 protected String vmArch() { 170 String arch = System.getProperty("os.arch"); 171 if (arch.equals("x86_64") || arch.equals("amd64")) { 172 return "x64"; 173 } else if (arch.contains("86")) { 174 return "x86"; 175 } else { 176 return arch; 177 } 178 } 179 180 /** 181 * @return VM type value extracted from the "java.vm.name" property. 182 */ 183 protected String vmFlavor() { 184 // E.g. "Java HotSpot(TM) 64-Bit Server VM" 185 String vmName = System.getProperty("java.vm.name"); 186 if (vmName == null) { 187 return errorWithMessage("Can't get 'java.vm.name' property"); 188 } 189 190 Pattern startP = Pattern.compile(".* (\\S+) VM"); 191 Matcher m = startP.matcher(vmName); 192 if (m.matches()) { 193 return m.group(1).toLowerCase(); 194 } 195 return errorWithMessage("Can't get VM flavor from 'java.vm.name'"); 196 } 197 198 /** 199 * @return VM compilation mode extracted from the "java.vm.info" property. 200 */ 201 protected String vmCompMode() { 202 // E.g. "mixed mode" 203 String vmInfo = System.getProperty("java.vm.info"); 204 if (vmInfo == null) { 205 return errorWithMessage("Can't get 'java.vm.info' property"); 206 } 207 vmInfo = vmInfo.toLowerCase(); 208 if (vmInfo.contains("mixed mode")) { 209 return "Xmixed"; 210 } else if (vmInfo.contains("compiled mode")) { 211 return "Xcomp"; 212 } else if (vmInfo.contains("interpreted mode")) { 213 return "Xint"; 214 } else { 215 return errorWithMessage("Can't get compilation mode from 'java.vm.info'"); 216 } 217 } 218 219 /** 220 * @return VM bitness, the value of the "sun.arch.data.model" property. 221 */ 222 protected String vmBits() { 223 String dataModel = System.getProperty("sun.arch.data.model"); 224 if (dataModel != null) { 225 return dataModel; 226 } else { 227 return errorWithMessage("Can't get 'sun.arch.data.model' property"); 228 } 229 } 230 231 /** 232 * @return "true" if Flight Recorder is enabled, "false" if is disabled. 233 */ 234 protected String vmFlightRecorder() { 235 Boolean isFlightRecorder = WB.getBooleanVMFlag("FlightRecorder"); 236 String startFROptions = WB.getStringVMFlag("StartFlightRecording"); 237 if (isFlightRecorder != null && isFlightRecorder) { 238 return "true"; 239 } 240 if (startFROptions != null && !startFROptions.isEmpty()) { 241 return "true"; 242 } 243 return "false"; 244 } 245 246 /** 247 * @return debug level value extracted from the "jdk.debug" property. 248 */ 249 protected String vmDebug() { 250 String debug = System.getProperty("jdk.debug"); 251 if (debug != null) { 252 return "" + debug.contains("debug"); 253 } else { 254 return errorWithMessage("Can't get 'jdk.debug' property"); 255 } 256 } 257 258 /** 259 * @return true if VM supports JVMCI and false otherwise 260 */ 261 protected String vmJvmci() { 262 // builds with jvmci have this flag 263 if (WB.getBooleanVMFlag("EnableJVMCI") == null) { 264 return "false"; 265 } 266 267 // Not all GCs have full JVMCI support 268 if (!WB.isJVMCISupportedByGC()) { 269 return "false"; 270 } 271 272 // Interpreted mode cannot enable JVMCI 273 if (vmCompMode().equals("Xint")) { 274 return "false"; 275 } 276 277 return "true"; 278 } 279 280 281 /** 282 * @return true if JVMCI is enabled 283 */ 284 protected String vmJvmciEnabled() { 285 // builds with jvmci have this flag 286 if ("false".equals(vmJvmci())) { 287 return "false"; 288 } 289 290 return "" + Compiler.isJVMCIEnabled(); 291 } 292 293 294 /** 295 * @return true if VM runs in emulated-client mode and false otherwise. 296 */ 297 protected String vmEmulatedClient() { 298 String vmInfo = System.getProperty("java.vm.info"); 299 if (vmInfo == null) { 300 return errorWithMessage("Can't get 'java.vm.info' property"); 301 } 302 return "" + vmInfo.contains(" emulated-client"); 303 } 304 305 /** 306 * @return supported CPU features 307 */ 308 protected String cpuFeatures() { 309 return CPUInfo.getFeatures().toString(); 310 } 311 312 /** 313 * For all existing GC sets vm.gc.X property. 314 * Example vm.gc.G1=true means: 315 * VM supports G1 316 * User either set G1 explicitely (-XX:+UseG1GC) or did not set any GC 317 * G1 can be selected, i.e. it doesn't conflict with other VM flags 318 * 319 * @param map - property-value pairs 320 */ 321 protected void vmGC(SafeMap map) { 322 var isJVMCIEnabled = Compiler.isJVMCIEnabled(); 323 Predicate<GC> vmGCProperty = (GC gc) -> (gc.isSupported() 324 && (!isJVMCIEnabled || gc.isSupportedByJVMCICompiler()) 325 && (gc.isSelected() || GC.isSelectedErgonomically())); 326 for (GC gc: GC.values()) { 327 map.put("vm.gc." + gc.name(), () -> "" + vmGCProperty.test(gc)); 328 } 329 330 // Special handling for ZGC modes 331 var vmGCZ = vmGCProperty.test(GC.Z); 332 var genZ = WB.getBooleanVMFlag("ZGenerational"); 333 var genZIsDefault = WB.isDefaultVMFlag("ZGenerational"); 334 // vm.gc.ZGenerational=true means: 335 // vm.gc.Z is true and ZGenerational is either explicitly true, or default 336 map.put("vm.gc.ZGenerational", () -> "" + (vmGCZ && (genZ || genZIsDefault))); 337 // vm.gc.ZSinglegen=true means: 338 // vm.gc.Z is true and ZGenerational is either explicitly false, or default 339 map.put("vm.gc.ZSinglegen", () -> "" + (vmGCZ && (!genZ || genZIsDefault))); 340 } 341 342 /** 343 * "jtreg -vmoptions:-Dtest.cds.runtime.options=..." can be used to specify 344 * the GC type to be used when running with a CDS archive. Set "vm.gc" accordingly, 345 * so that tests that need to explicitly choose the GC type can be excluded 346 * with "@requires vm.gc == null". 347 * 348 * @param map - property-value pairs 349 */ 350 protected void vmGCforCDS(SafeMap map) { 351 if (!GC.isSelectedErgonomically()) { 352 // The GC has been explicitly specified on the command line, so 353 // jtreg will set the "vm.gc" property. Let's not interfere with it. 354 return; 355 } 356 357 String GC_PREFIX = "-XX:+Use"; 358 String GC_SUFFIX = "GC"; 359 String jtropts = System.getProperty("test.cds.runtime.options"); 360 if (jtropts != null) { 361 for (String opt : jtropts.split(",")) { 362 if (opt.startsWith(GC_PREFIX) && opt.endsWith(GC_SUFFIX)) { 363 String gc = opt.substring(GC_PREFIX.length(), opt.length() - GC_SUFFIX.length()); 364 map.put("vm.gc", () -> gc); 365 } 366 } 367 } 368 } 369 370 /** 371 * Selected final flag. 372 * 373 * @param map - property-value pairs 374 * @param flagName - flag name 375 */ 376 private void vmOptFinalFlag(SafeMap map, String flagName) { 377 map.put("vm.opt.final." + flagName, 378 () -> String.valueOf(WB.getBooleanVMFlag(flagName))); 379 } 380 381 /** 382 * Selected sets of final flags. 383 * 384 * @param map - property-value pairs 385 */ 386 protected void vmOptFinalFlags(SafeMap map) { 387 vmOptFinalFlag(map, "ClassUnloading"); 388 vmOptFinalFlag(map, "ClassUnloadingWithConcurrentMark"); 389 vmOptFinalFlag(map, "CriticalJNINatives"); 390 vmOptFinalFlag(map, "EnableJVMCI"); 391 vmOptFinalFlag(map, "EliminateAllocations"); 392 vmOptFinalFlag(map, "UseCompressedOops"); 393 vmOptFinalFlag(map, "UseVectorizedMismatchIntrinsic"); 394 vmOptFinalFlag(map, "UseVtableBasedCHA"); 395 vmOptFinalFlag(map, "ZGenerational"); 396 } 397 398 /** 399 * @return "true" if VM has a serviceability agent. 400 */ 401 protected String vmHasSA() { 402 return "" + Platform.hasSA(); 403 } 404 405 /** 406 * @return "true" if the VM is compiled with Java Flight Recorder (JFR) 407 * support. 408 */ 409 protected String vmHasJFR() { 410 return "" + WB.isJFRIncluded(); 411 } 412 413 /** 414 * @return "true" if the VM is compiled with JVMTI 415 */ 416 protected String vmHasJVMTI() { 417 return "" + WB.isJVMTIIncluded(); 418 } 419 420 /** 421 * @return "true" if the VM is compiled with DTrace 422 */ 423 protected String vmHasDTrace() { 424 return "" + WB.isDTraceIncluded(); 425 } 426 427 /** 428 * @return true if compiler in use supports RTM and false otherwise. 429 */ 430 protected String vmRTMCompiler() { 431 boolean isRTMCompiler = false; 432 433 if (Compiler.isC2Enabled() && 434 (Platform.isX86() || Platform.isX64() || Platform.isPPC())) { 435 isRTMCompiler = true; 436 } 437 return "" + isRTMCompiler; 438 } 439 440 /** 441 * @return true if VM runs RTM supported CPU and false otherwise. 442 */ 443 protected String vmRTMCPU() { 444 return "" + CPUInfo.hasFeature("rtm"); 445 } 446 447 /** 448 * Check for CDS support. 449 * 450 * @return true if CDS is supported by the VM to be tested. 451 */ 452 protected String vmCDS() { 453 return "" + WB.isCDSIncluded(); 454 } 455 456 /** 457 * Check for CDS support for custom loaders. 458 * 459 * @return true if CDS provides support for customer loader in the VM to be tested. 460 */ 461 protected String vmCDSForCustomLoaders() { 462 return "" + ("true".equals(vmCDS()) && Platform.areCustomLoadersSupportedForCDS()); 463 } 464 465 /** 466 * @return true if this VM can write Java heap objects into the CDS archive 467 */ 468 protected String vmCDSCanWriteArchivedJavaHeap() { 469 return "" + ("true".equals(vmCDS()) && WB.canWriteJavaHeapArchive()); 470 } 471 472 /** 473 * @return "true" if this VM supports continuations. 474 */ 475 protected String vmContinuations() { 476 if (WB.getBooleanVMFlag("VMContinuations")) { 477 return "true"; 478 } else { 479 return "false"; 480 } 481 } 482 483 /** 484 * @return System page size in bytes. 485 */ 486 protected String vmPageSize() { 487 return "" + WB.getVMPageSize(); 488 } 489 490 /** 491 * Check if Graal is used as JIT compiler. 492 * 493 * @return true if Graal is used as JIT compiler. 494 */ 495 protected String isGraalEnabled() { 496 return "" + Compiler.isGraalEnabled(); 497 } 498 499 /** 500 * Check if the libgraal shared library file is present. 501 * 502 * @return true if the libgraal shared library file is present. 503 */ 504 protected String hasLibgraal() { 505 return "" + WB.hasLibgraal(); 506 } 507 508 /** 509 * Check if libgraal is used as JIT compiler. 510 * 511 * @return true if libgraal is used as JIT compiler. 512 */ 513 protected String isLibgraalEnabled() { 514 return "" + Compiler.isLibgraalEnabled(); 515 } 516 517 /** 518 * Check if Compiler1 is present. 519 * 520 * @return true if Compiler1 is used as JIT compiler, either alone or as part of the tiered system. 521 */ 522 protected String isCompiler1Enabled() { 523 return "" + Compiler.isC1Enabled(); 524 } 525 526 /** 527 * Check if Compiler2 is present. 528 * 529 * @return true if Compiler2 is used as JIT compiler, either alone or as part of the tiered system. 530 */ 531 protected String isCompiler2Enabled() { 532 return "" + Compiler.isC2Enabled(); 533 } 534 535 /** 536 * A simple check for docker support 537 * 538 * @return true if docker is supported in a given environment 539 */ 540 protected String dockerSupport() { 541 log("Entering dockerSupport()"); 542 543 boolean isSupported = false; 544 if (Platform.isLinux()) { 545 // currently docker testing is only supported for Linux, 546 // on certain platforms 547 548 String arch = System.getProperty("os.arch"); 549 550 if (Platform.isX64()) { 551 isSupported = true; 552 } else if (Platform.isAArch64()) { 553 isSupported = true; 554 } else if (Platform.isS390x()) { 555 isSupported = true; 556 } else if (arch.equals("ppc64le")) { 557 isSupported = true; 558 } 559 } 560 561 log("dockerSupport(): platform check: isSupported = " + isSupported); 562 563 if (isSupported) { 564 try { 565 isSupported = checkDockerSupport(); 566 } catch (Exception e) { 567 isSupported = false; 568 } 569 } 570 571 log("dockerSupport(): returning isSupported = " + isSupported); 572 return "" + isSupported; 573 } 574 575 // Configures process builder to redirect process stdout and stderr to a file. 576 // Returns file names for stdout and stderr. 577 private Map<String, String> redirectOutputToLogFile(String msg, ProcessBuilder pb, String fileNameBase) { 578 Map<String, String> result = new HashMap<>(); 579 String timeStamp = Instant.now().toString().replace(":", "-").replace(".", "-"); 580 581 String stdoutFileName = String.format("./%s-stdout--%s.log", fileNameBase, timeStamp); 582 pb.redirectOutput(new File(stdoutFileName)); 583 log(msg + ": child process stdout redirected to " + stdoutFileName); 584 result.put("stdout", stdoutFileName); 585 586 String stderrFileName = String.format("./%s-stderr--%s.log", fileNameBase, timeStamp); 587 pb.redirectError(new File(stderrFileName)); 588 log(msg + ": child process stderr redirected to " + stderrFileName); 589 result.put("stderr", stderrFileName); 590 591 return result; 592 } 593 594 private void printLogfileContent(Map<String, String> logFileNames) { 595 logFileNames.entrySet().stream() 596 .forEach(entry -> 597 { 598 log("------------- " + entry.getKey()); 599 try { 600 Files.lines(Path.of(entry.getValue())) 601 .forEach(line -> log(line)); 602 } catch (IOException ie) { 603 log("Exception while reading file: " + ie); 604 } 605 log("-------------"); 606 }); 607 } 608 609 private boolean checkDockerSupport() throws IOException, InterruptedException { 610 log("checkDockerSupport(): entering"); 611 ProcessBuilder pb = new ProcessBuilder("which", Container.ENGINE_COMMAND); 612 Map<String, String> logFileNames = 613 redirectOutputToLogFile("checkDockerSupport(): which " + Container.ENGINE_COMMAND, 614 pb, "which-container"); 615 Process p = pb.start(); 616 p.waitFor(10, TimeUnit.SECONDS); 617 int exitValue = p.exitValue(); 618 619 log(String.format("checkDockerSupport(): exitValue = %s, pid = %s", exitValue, p.pid())); 620 if (exitValue != 0) { 621 printLogfileContent(logFileNames); 622 } 623 624 return (exitValue == 0); 625 } 626 627 /** 628 * Checks musl libc. 629 * 630 * @return true if musl libc is used. 631 */ 632 protected String isMusl() { 633 return Boolean.toString(WB.getLibcName().contains("musl")); 634 } 635 636 private String implementor() { 637 try (InputStream in = new BufferedInputStream(new FileInputStream( 638 System.getProperty("java.home") + "/release"))) { 639 Properties properties = new Properties(); 640 properties.load(in); 641 String implementorProperty = properties.getProperty("IMPLEMENTOR"); 642 if (implementorProperty != null) { 643 return implementorProperty.replace("\"", ""); 644 } 645 return errorWithMessage("Can't get 'IMPLEMENTOR' property from 'release' file"); 646 } catch (IOException e) { 647 e.printStackTrace(); 648 return errorWithMessage("Failed to read 'release' file " + e); 649 } 650 } 651 652 private String jdkContainerized() { 653 String isEnabled = System.getenv("TEST_JDK_CONTAINERIZED"); 654 return "" + "true".equalsIgnoreCase(isEnabled); 655 } 656 657 /** 658 * Checks if we are in <i>almost</i> out-of-box configuration, i.e. the flags 659 * which JVM is started with don't affect its behavior "significantly". 660 * {@code TEST_VM_FLAGLESS} enviroment variable can be used to force this 661 * method to return true and allow any flags. 662 * 663 * @return true if there are no JVM flags 664 */ 665 private String isFlagless() { 666 boolean result = true; 667 if (System.getenv("TEST_VM_FLAGLESS") != null) { 668 return "" + result; 669 } 670 671 List<String> allFlags = allFlags().toList(); 672 673 // check -XX flags 674 var ignoredXXFlags = Set.of( 675 // added by run-test framework 676 "MaxRAMPercentage", 677 // added by test environment 678 "CreateCoredumpOnCrash" 679 ); 680 result &= allFlags.stream() 681 .filter(s -> s.startsWith("-XX:")) 682 // map to names: 683 // remove -XX: 684 .map(s -> s.substring(4)) 685 // remove +/- from bool flags 686 .map(s -> s.charAt(0) == '+' || s.charAt(0) == '-' ? s.substring(1) : s) 687 // remove =.* from others 688 .map(s -> s.contains("=") ? s.substring(0, s.indexOf('=')) : s) 689 // skip known-to-be-there flags 690 .filter(s -> !ignoredXXFlags.contains(s)) 691 .findAny() 692 .isEmpty(); 693 694 // check -X flags 695 var ignoredXFlags = Set.of( 696 // default, yet still seen to be explicitly set 697 "mixed", 698 // -XmxmNNNm added by run-test framework for non-hotspot tests 699 "mx" 700 ); 701 result &= allFlags.stream() 702 .filter(s -> s.startsWith("-X") && !s.startsWith("-XX:")) 703 // map to names: 704 // remove -X 705 .map(s -> s.substring(2)) 706 // remove :.* from flags with values 707 .map(s -> s.contains(":") ? s.substring(0, s.indexOf(':')) : s) 708 // remove size like 4G, 768m which might be set for non-hotspot tests 709 .map(s -> s.replaceAll("(\\d+)[mMgGkK]", "")) 710 // skip known-to-be-there flags 711 .filter(s -> !ignoredXFlags.contains(s)) 712 .findAny() 713 .isEmpty(); 714 715 return "" + result; 716 } 717 718 private Stream<String> allFlags() { 719 return Stream.of((System.getProperty("test.vm.opts", "") + " " + System.getProperty("test.java.opts", "")).trim().split("\\s+")); 720 } 721 722 /** 723 * Parses extra options, options that start with -X excluding the 724 * bare -X option (as it is not considered an extra option). 725 * Ignores extra options not starting with -X 726 * 727 * This could be improved to handle extra options not starting 728 * with -X as well as "standard" options. 729 */ 730 private Map<String, String> xOptFlags() { 731 return allFlags() 732 .filter(s -> s.startsWith("-X") && !s.startsWith("-XX:") && !s.equals("-X")) 733 .map(s -> s.replaceFirst("-", "")) 734 .map(flag -> flag.splitWithDelimiters("[:0123456789]", 2)) 735 .collect(Collectors.toMap(a -> "vm.opt.x." + a[0], 736 a -> (a.length == 1) 737 ? "true" // -Xnoclassgc 738 : (a[1].equals(":") 739 ? a[2] // ["-XshowSettings", ":", "system"] 740 : a[1] + a[2]))); // ["-Xmx", "4", "g"] 741 } 742 743 /* 744 * A string indicating the foreign linker that is currently being used. See jdk.internal.foreign.CABI 745 * for valid values. 746 * 747 * "FALLBACK" and "UNSUPPORTED" are special values. The former indicates the fallback linker is 748 * being used. The latter indicates an unsupported platform. 749 */ 750 private String jdkForeignLinker() { 751 return String.valueOf(CABI.current()); 752 } 753 754 /** 755 * Dumps the map to the file if the file name is given as the property. 756 * This functionality could be helpful to know context in the real 757 * execution. 758 * 759 * @param map 760 */ 761 protected static void dump(Map<String, String> map) { 762 String dumpFileName = System.getProperty("vmprops.dump"); 763 if (dumpFileName == null) { 764 return; 765 } 766 List<String> lines = new ArrayList<>(); 767 map.forEach((k, v) -> lines.add(k + ":" + v)); 768 Collections.sort(lines); 769 try { 770 Files.write(Paths.get(dumpFileName), lines, 771 StandardOpenOption.APPEND, StandardOpenOption.CREATE); 772 } catch (IOException e) { 773 throw new RuntimeException("Failed to dump properties into '" 774 + dumpFileName + "'", e); 775 } 776 } 777 778 /** 779 * Log diagnostic message. 780 * 781 * @param msg 782 */ 783 protected static void log(String msg) { 784 // Always log to a file. 785 logToFile(msg); 786 787 // Also log to stderr; guarded by property to avoid excessive verbosity. 788 // By jtreg design stderr produced here will be visible 789 // in the output of a parent process. Note: stdout should not be used 790 // for logging as jtreg parses that output directly and only echoes it 791 // in the event of a failure. 792 if (Boolean.getBoolean("jtreg.log.vmprops")) { 793 System.err.println("VMProps: " + msg); 794 } 795 } 796 797 /** 798 * Log diagnostic message to a file. 799 * 800 * @param msg 801 */ 802 protected static void logToFile(String msg) { 803 String fileName = "./vmprops.log"; 804 try { 805 Files.writeString(Paths.get(fileName), msg + "\n", Charset.forName("ISO-8859-1"), 806 StandardOpenOption.APPEND, StandardOpenOption.CREATE); 807 } catch (IOException e) { 808 throw new RuntimeException("Failed to log into '" + fileName + "'", e); 809 } 810 } 811 812 /** 813 * This method is for the testing purpose only. 814 * 815 * @param args 816 */ 817 public static void main(String args[]) { 818 Map<String, String> map = new VMProps().call(); 819 map.forEach((k, v) -> System.out.println(k + ": '" + v + "'")); 820 } 821 }