1 /*
2 * Copyright (c) 2016, 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 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.Stream;
51
52 import jdk.internal.foreign.CABI;
53 import jdk.internal.misc.PreviewFeatures;
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 String GC_PREFIX = "-XX:+Use";
72 private static final String GC_SUFFIX = "GC";
73
74 private static final WhiteBox WB = WhiteBox.getWhiteBox();
75
76 private static class SafeMap {
77 private final Map<String, String> map = new HashMap<>();
78
79 public void put(String key, Supplier<String> s) {
80 String value;
81 try {
82 value = s.get();
83 } catch (Throwable t) {
84 System.err.println("failed to get value for " + key);
85 t.printStackTrace(System.err);
86 value = ERROR_STATE + t;
87 }
88 map.put(key, value);
89 }
90 }
91
92 /**
93 * Collects information about VM properties.
94 * This method will be invoked by jtreg.
95 *
96 * @return Map of property-value pairs.
97 */
98 @Override
99 public Map<String, String> call() {
100 log("Entering call()");
101 SafeMap map = new SafeMap();
102 map.put("vm.flavor", this::vmFlavor);
103 map.put("vm.compMode", this::vmCompMode);
104 map.put("vm.bits", this::vmBits);
105 map.put("vm.flightRecorder", this::vmFlightRecorder);
106 map.put("vm.simpleArch", this::vmArch);
107 map.put("vm.debug", this::vmDebug);
108 map.put("vm.jvmci", this::vmJvmci);
109 map.put("vm.jvmci.enabled", this::vmJvmciEnabled);
110 map.put("vm.emulatedClient", this::vmEmulatedClient);
111 // vm.hasSA is "true" if the VM contains the serviceability agent
112 // and jhsdb.
113 map.put("vm.hasSA", this::vmHasSA);
114 // vm.hasJFR is "true" if JFR is included in the build of the VM and
115 // so tests can be executed.
116 map.put("vm.hasJFR", this::vmHasJFR);
117 map.put("vm.hasDTrace", this::vmHasDTrace);
118 map.put("vm.jvmti", this::vmHasJVMTI);
119 map.put("vm.cpu.features", this::cpuFeatures);
120 map.put("vm.pageSize", this::vmPageSize);
121 map.put("vm.rtm.cpu", this::vmRTMCPU);
122 map.put("vm.rtm.compiler", this::vmRTMCompiler);
123 // vm.cds is true if the VM is compiled with cds support.
124 map.put("vm.cds", this::vmCDS);
125 map.put("vm.cds.custom.loaders", this::vmCDSForCustomLoaders);
126 map.put("vm.cds.supports.aot.class.linking", this::vmCDSSupportsAOTClassLinking);
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 map.put("java.enablePreview", this::isPreviewEnabled);
134 map.put("vm.libgraal.jit", this::isLibgraalJIT);
135 map.put("vm.compiler1.enabled", this::isCompiler1Enabled);
136 map.put("vm.compiler2.enabled", this::isCompiler2Enabled);
137 map.put("container.support", this::containerSupport);
138 map.put("systemd.support", this::systemdSupport);
139 map.put("vm.musl", this::isMusl);
140 map.put("release.implementor", this::implementor);
141 map.put("jdk.containerized", this::jdkContainerized);
142 map.put("vm.flagless", this::isFlagless);
143 map.put("jdk.foreign.linker", this::jdkForeignLinker);
144 map.put("jlink.packagedModules", this::packagedModules);
145 map.put("jdk.static", this::isStatic);
146 vmGC(map); // vm.gc.X = true/false
147 vmGCforCDS(map); // may set vm.gc
148 vmOptFinalFlags(map);
149
150 dump(map.map);
151 log("Leaving call()");
152 return map.map;
153 }
154
155 /**
156 * Print a stack trace before returning error state;
157 * Used by the various helper functions which parse information from
158 * VM properties in the case where they don't find an expected property
159 * or a property doesn't conform to an expected format.
160 *
161 * @return {@link #ERROR_STATE}
162 */
163 private String errorWithMessage(String message) {
164 new Exception(message).printStackTrace();
165 return ERROR_STATE + message;
166 }
167
168 /**
169 * @return vm.simpleArch value of "os.simpleArch" property of tested JDK.
170 */
171 protected String vmArch() {
172 String arch = System.getProperty("os.arch");
173 if (arch.equals("x86_64") || arch.equals("amd64")) {
174 return "x64";
175 } else if (arch.contains("86")) {
176 return "x86";
177 } else {
178 return arch;
179 }
180 }
181
182 /**
183 * @return VM type value extracted from the "java.vm.name" property.
184 */
185 protected String vmFlavor() {
186 // E.g. "Java HotSpot(TM) 64-Bit Server VM"
187 String vmName = System.getProperty("java.vm.name");
188 if (vmName == null) {
189 return errorWithMessage("Can't get 'java.vm.name' property");
190 }
191
192 Pattern startP = Pattern.compile(".* (\\S+) VM");
193 Matcher m = startP.matcher(vmName);
194 if (m.matches()) {
195 return m.group(1).toLowerCase();
196 }
197 return errorWithMessage("Can't get VM flavor from 'java.vm.name'");
198 }
199
200 /**
201 * @return VM compilation mode extracted from the "java.vm.info" property.
202 */
203 protected String vmCompMode() {
204 // E.g. "mixed mode"
205 String vmInfo = System.getProperty("java.vm.info");
206 if (vmInfo == null) {
207 return errorWithMessage("Can't get 'java.vm.info' property");
208 }
209 vmInfo = vmInfo.toLowerCase();
210 if (vmInfo.contains("mixed mode")) {
211 return "Xmixed";
212 } else if (vmInfo.contains("compiled mode")) {
213 return "Xcomp";
214 } else if (vmInfo.contains("interpreted mode")) {
215 return "Xint";
216 } else {
217 return errorWithMessage("Can't get compilation mode from 'java.vm.info'");
218 }
219 }
220
221 /**
222 * @return VM bitness, the value of the "sun.arch.data.model" property.
223 */
224 protected String vmBits() {
225 String dataModel = System.getProperty("sun.arch.data.model");
226 if (dataModel != null) {
227 return dataModel;
228 } else {
229 return errorWithMessage("Can't get 'sun.arch.data.model' property");
230 }
231 }
232
233 /**
234 * @return "true" if Flight Recorder is enabled, "false" if is disabled.
235 */
236 protected String vmFlightRecorder() {
237 Boolean isFlightRecorder = WB.getBooleanVMFlag("FlightRecorder");
238 String startFROptions = WB.getStringVMFlag("StartFlightRecording");
239 if (isFlightRecorder != null && isFlightRecorder) {
240 return "true";
241 }
242 if (startFROptions != null && !startFROptions.isEmpty()) {
243 return "true";
244 }
245 return "false";
246 }
247
248 /**
249 * @return debug level value extracted from the "jdk.debug" property.
250 */
251 protected String vmDebug() {
252 String debug = System.getProperty("jdk.debug");
253 if (debug != null) {
254 return "" + debug.contains("debug");
255 } else {
256 return errorWithMessage("Can't get 'jdk.debug' property");
257 }
258 }
259
260 /**
261 * @return true if VM supports JVMCI and false otherwise
262 */
263 protected String vmJvmci() {
264 // builds with jvmci have this flag
265 if (WB.getBooleanVMFlag("EnableJVMCI") == null) {
266 return "false";
267 }
268
269 // Not all GCs have full JVMCI support
270 if (!WB.isJVMCISupportedByGC()) {
271 return "false";
272 }
273
274 // Interpreted mode cannot enable JVMCI
275 if (vmCompMode().equals("Xint")) {
276 return "false";
277 }
278
279 return "true";
280 }
281
282
283 /**
284 * @return true if JVMCI is enabled
285 */
286 protected String vmJvmciEnabled() {
287 // builds with jvmci have this flag
288 if ("false".equals(vmJvmci())) {
289 return "false";
290 }
291
292 return "" + Compiler.isJVMCIEnabled();
293 }
294
295
296 /**
297 * @return true if VM runs in emulated-client mode and false otherwise.
298 */
299 protected String vmEmulatedClient() {
300 String vmInfo = System.getProperty("java.vm.info");
301 if (vmInfo == null) {
302 return errorWithMessage("Can't get 'java.vm.info' property");
303 }
304 return "" + vmInfo.contains(" emulated-client");
305 }
306
307 /**
308 * @return supported CPU features
309 */
310 protected String cpuFeatures() {
311 return CPUInfo.getFeatures().toString();
312 }
313
314 /**
315 * For all existing GC sets vm.gc.X property.
316 * Example vm.gc.G1=true means:
317 * VM supports G1
318 * User either set G1 explicitely (-XX:+UseG1GC) or did not set any GC
319 * G1 can be selected, i.e. it doesn't conflict with other VM flags
320 *
321 * @param map - property-value pairs
322 */
323 protected void vmGC(SafeMap map) {
324 var isJVMCIEnabled = Compiler.isJVMCIEnabled();
325 Predicate<GC> vmGCProperty = (GC gc) -> (gc.isSupported()
326 && (!isJVMCIEnabled || gc.isSupportedByJVMCICompiler())
327 && (gc.isSelected() || GC.isSelectedErgonomically()));
328 for (GC gc: GC.values()) {
329 map.put("vm.gc." + gc.name(), () -> "" + vmGCProperty.test(gc));
330 }
331 }
332
333 /**
334 * "jtreg -vmoptions:-Dtest.cds.runtime.options=..." can be used to specify
335 * the GC type to be used when running with a CDS archive. Set "vm.gc" accordingly,
336 * so that tests that need to explicitly choose the GC type can be excluded
337 * with "@requires vm.gc == null".
338 *
339 * @param map - property-value pairs
340 */
341 protected void vmGCforCDS(SafeMap map) {
342 if (!GC.isSelectedErgonomically()) {
343 // The GC has been explicitly specified on the command line, so
344 // jtreg will set the "vm.gc" property. Let's not interfere with it.
345 return;
346 }
347
348 String jtropts = System.getProperty("test.cds.runtime.options");
349 if (jtropts != null) {
350 for (String opt : jtropts.split(",")) {
351 if (opt.startsWith(GC_PREFIX) && opt.endsWith(GC_SUFFIX)) {
352 String gc = opt.substring(GC_PREFIX.length(), opt.length() - GC_SUFFIX.length());
353 map.put("vm.gc", () -> gc);
354 }
355 }
356 }
357 }
358
359 /**
360 * Selected final flag.
361 *
362 * @param map - property-value pairs
363 * @param flagName - flag name
364 */
365 private void vmOptFinalFlag(SafeMap map, String flagName) {
366 map.put("vm.opt.final." + flagName,
367 () -> String.valueOf(WB.getBooleanVMFlag(flagName)));
368 }
369
370 /**
371 * Selected sets of final flags.
372 *
373 * @param map - property-value pairs
374 */
375 protected void vmOptFinalFlags(SafeMap map) {
376 vmOptFinalFlag(map, "ClassUnloading");
377 vmOptFinalFlag(map, "ClassUnloadingWithConcurrentMark");
378 vmOptFinalFlag(map, "CriticalJNINatives");
379 vmOptFinalFlag(map, "EnableJVMCI");
380 vmOptFinalFlag(map, "EliminateAllocations");
381 vmOptFinalFlag(map, "UnlockExperimentalVMOptions");
382 vmOptFinalFlag(map, "UseCompressedOops");
383 vmOptFinalFlag(map, "UseLargePages");
384 vmOptFinalFlag(map, "UseTransparentHugePages");
385 vmOptFinalFlag(map, "UseVectorizedMismatchIntrinsic");
386 }
387
388 /**
389 * @return "true" if VM has a serviceability agent.
390 */
391 protected String vmHasSA() {
392 return "" + Platform.hasSA();
393 }
394
395 /**
396 * @return "true" if the VM is compiled with Java Flight Recorder (JFR)
397 * support.
398 */
399 protected String vmHasJFR() {
400 return "" + WB.isJFRIncluded();
401 }
402
403 /**
404 * @return "true" if the VM is compiled with JVMTI
405 */
406 protected String vmHasJVMTI() {
407 return "" + WB.isJVMTIIncluded();
408 }
409
410 /**
411 * @return "true" if the VM is compiled with DTrace
412 */
413 protected String vmHasDTrace() {
414 return "" + WB.isDTraceIncluded();
415 }
416
417 /**
418 * @return "true" if compiler in use supports RTM and "false" otherwise.
419 * Note: Lightweight locking does not support RTM (for now).
420 */
421 protected String vmRTMCompiler() {
422 boolean isRTMCompiler = false;
423
424 if (Compiler.isC2Enabled() &&
425 (Platform.isX86() || Platform.isX64() || Platform.isPPC()) &&
426 is_LM_LIGHTWEIGHT().equals("false")) {
427 isRTMCompiler = true;
428 }
429 return "" + isRTMCompiler;
430 }
431
432 /**
433 * @return true if VM runs RTM supported CPU and false otherwise.
434 */
435 protected String vmRTMCPU() {
436 return "" + CPUInfo.hasFeature("rtm");
437 }
438
439 /**
440 * Check for CDS support.
441 *
442 * @return true if CDS is supported by the VM to be tested.
443 */
444 protected String vmCDS() {
445 return "" + WB.isCDSIncluded();
446 }
447
448 /**
449 * Check for CDS support for custom loaders.
450 *
451 * @return true if CDS provides support for customer loader in the VM to be tested.
452 */
453 protected String vmCDSForCustomLoaders() {
454 return "" + ("true".equals(vmCDS()) && Platform.areCustomLoadersSupportedForCDS());
455 }
456
457 /**
458 * @return true if it's possible for "java -Xshare:dump" to write Java heap objects
459 * with the current set of jtreg VM options. For example, false will be returned
460 * if -XX:-UseCompressedClassPointers is specified,
461 */
462 protected String vmCDSCanWriteArchivedJavaHeap() {
463 return "" + ("true".equals(vmCDS()) && WB.canWriteJavaHeapArchive()
464 && isCDSRuntimeOptionsCompatible());
465 }
466
467 /**
468 * @return true if this VM can support the -XX:AOTClassLinking option
469 */
470 protected String vmCDSSupportsAOTClassLinking() {
471 // Currently, the VM supports AOTClassLinking as long as it's able to write archived java heap.
472 return vmCDSCanWriteArchivedJavaHeap();
473 }
474
475 /**
476 * @return true if the VM options specified via the "test.cds.runtime.options"
477 * property is compatible with writing Java heap objects into the CDS archive
478 */
479 protected boolean isCDSRuntimeOptionsCompatible() {
480 String jtropts = System.getProperty("test.cds.runtime.options");
481 if (jtropts == null) {
482 return true;
483 }
484 String CCP_DISABLED = "-XX:-UseCompressedClassPointers";
485 String G1GC_ENABLED = "-XX:+UseG1GC";
486 String PARALLELGC_ENABLED = "-XX:+UseParallelGC";
487 String SERIALGC_ENABLED = "-XX:+UseSerialGC";
488 for (String opt : jtropts.split(",")) {
489 if (opt.equals(CCP_DISABLED)) {
490 return false;
491 }
492 if (opt.startsWith(GC_PREFIX) && opt.endsWith(GC_SUFFIX) &&
493 !opt.equals(G1GC_ENABLED) && !opt.equals(PARALLELGC_ENABLED) && !opt.equals(SERIALGC_ENABLED)) {
494 return false;
495 }
496 }
497 return true;
498 }
499
500 /**
501 * @return "true" if this VM supports continuations.
502 */
503 protected String vmContinuations() {
504 if (WB.getBooleanVMFlag("VMContinuations")) {
505 return "true";
506 } else {
507 return "false";
508 }
509 }
510
511 /**
512 * @return System page size in bytes.
513 */
514 protected String vmPageSize() {
515 return "" + WB.getVMPageSize();
516 }
517
518 /**
519 * @return LockingMode.
520 */
521 protected String vmLockingMode() {
522 return "" + WB.getIntVMFlag("LockingMode");
523 }
524
525 /**
526 * @return "true" if LockingMode == 0 (LM_MONITOR)
527 */
528 protected String is_LM_MONITOR() {
529 return "" + vmLockingMode().equals("0");
530 }
531
532 /**
533 * @return "true" if LockingMode == 1 (LM_LEGACY)
534 */
535 protected String is_LM_LEGACY() {
536 return "" + vmLockingMode().equals("1");
537 }
538
539 /**
540 * @return "true" if LockingMode == 2 (LM_LIGHTWEIGHT)
541 */
542 protected String is_LM_LIGHTWEIGHT() {
543 return "" + vmLockingMode().equals("2");
544 }
545
546 /**
547 * Check if Graal is used as JIT compiler.
548 *
549 * @return true if Graal is used as JIT compiler.
550 */
551 protected String isGraalEnabled() {
552 return "" + Compiler.isGraalEnabled();
553 }
554
555 /**
556 * Check if the libgraal shared library file is present.
557 *
558 * @return true if the libgraal shared library file is present.
559 */
560 protected String hasLibgraal() {
561 return "" + WB.hasLibgraal();
562 }
563
564 /**
565 * Check if libgraal is used as JIT compiler.
566 *
567 * @return true if libgraal is used as JIT compiler.
568 */
569 protected String isLibgraalJIT() {
570 return "" + Compiler.isLibgraalJIT();
571 }
572
573 /**
574 * Check if Compiler1 is present.
575 *
576 * @return true if Compiler1 is used as JIT compiler, either alone or as part of the tiered system.
577 */
578 protected String isCompiler1Enabled() {
579 return "" + Compiler.isC1Enabled();
580 }
581
582 /**
583 * Check if Compiler2 is present.
584 *
585 * @return true if Compiler2 is used as JIT compiler, either alone or as part of the tiered system.
586 */
587 protected String isCompiler2Enabled() {
588 return "" + Compiler.isC2Enabled();
589 }
590
591 protected String isPreviewEnabled() {
592 return "" + PreviewFeatures.isEnabled();
593 }
594 /**
595 * A simple check for container support
596 *
597 * @return true if container is supported in a given environment
598 */
599 protected String containerSupport() {
600 log("Entering containerSupport()");
601
602 boolean isSupported = false;
603 if (Platform.isLinux()) {
604 // currently container testing is only supported for Linux,
605 // on certain platforms
606
607 String arch = System.getProperty("os.arch");
608
609 if (Platform.isX64()) {
610 isSupported = true;
611 } else if (Platform.isAArch64()) {
612 isSupported = true;
613 } else if (Platform.isS390x()) {
614 isSupported = true;
615 } else if (arch.equals("ppc64le")) {
616 isSupported = true;
617 }
618 }
619
620 log("containerSupport(): platform check: isSupported = " + isSupported);
621
622 if (isSupported) {
623 try {
624 isSupported = checkProgramSupport("checkContainerSupport()", Container.ENGINE_COMMAND);
625 } catch (Exception e) {
626 isSupported = false;
627 }
628 }
629
630 log("containerSupport(): returning isSupported = " + isSupported);
631 return "" + isSupported;
632 }
633
634 /**
635 * A simple check for systemd support
636 *
637 * @return true if systemd is supported in a given environment
638 */
639 protected String systemdSupport() {
640 log("Entering systemdSupport()");
641
642 boolean isSupported = Platform.isLinux();
643 if (isSupported) {
644 try {
645 isSupported = checkProgramSupport("checkSystemdSupport()", "systemd-run");
646 } catch (Exception e) {
647 isSupported = false;
648 }
649 }
650
651 log("systemdSupport(): returning isSupported = " + isSupported);
652 return "" + isSupported;
653 }
654
655 // Configures process builder to redirect process stdout and stderr to a file.
656 // Returns file names for stdout and stderr.
657 private Map<String, String> redirectOutputToLogFile(String msg, ProcessBuilder pb, String fileNameBase) {
658 Map<String, String> result = new HashMap<>();
659 String timeStamp = Instant.now().toString().replace(":", "-").replace(".", "-");
660
661 String stdoutFileName = String.format("./%s-stdout--%s.log", fileNameBase, timeStamp);
662 pb.redirectOutput(new File(stdoutFileName));
663 log(msg + ": child process stdout redirected to " + stdoutFileName);
664 result.put("stdout", stdoutFileName);
665
666 String stderrFileName = String.format("./%s-stderr--%s.log", fileNameBase, timeStamp);
667 pb.redirectError(new File(stderrFileName));
668 log(msg + ": child process stderr redirected to " + stderrFileName);
669 result.put("stderr", stderrFileName);
670
671 return result;
672 }
673
674 private void printLogfileContent(Map<String, String> logFileNames) {
675 logFileNames.entrySet().stream()
676 .forEach(entry ->
677 {
678 log("------------- " + entry.getKey());
679 try {
680 Files.lines(Path.of(entry.getValue()))
681 .forEach(line -> log(line));
682 } catch (IOException ie) {
683 log("Exception while reading file: " + ie);
684 }
685 log("-------------");
686 });
687 }
688
689 private boolean checkProgramSupport(String logString, String cmd) throws IOException, InterruptedException {
690 log(logString + ": entering");
691 ProcessBuilder pb = new ProcessBuilder("which", cmd);
692 Map<String, String> logFileNames =
693 redirectOutputToLogFile(logString + ": which " + cmd,
694 pb, "which-cmd");
695 Process p = pb.start();
696 p.waitFor(10, TimeUnit.SECONDS);
697 int exitValue = p.exitValue();
698
699 log(String.format("%s: exitValue = %s, pid = %s", logString, exitValue, p.pid()));
700 if (exitValue != 0) {
701 printLogfileContent(logFileNames);
702 }
703
704 return (exitValue == 0);
705 }
706
707 /**
708 * Checks musl libc.
709 *
710 * @return true if musl libc is used.
711 */
712 protected String isMusl() {
713 return Boolean.toString(WB.getLibcName().contains("musl"));
714 }
715
716 private String implementor() {
717 try (InputStream in = new BufferedInputStream(new FileInputStream(
718 System.getProperty("java.home") + "/release"))) {
719 Properties properties = new Properties();
720 properties.load(in);
721 String implementorProperty = properties.getProperty("IMPLEMENTOR");
722 if (implementorProperty != null) {
723 return implementorProperty.replace("\"", "");
724 }
725 return errorWithMessage("Can't get 'IMPLEMENTOR' property from 'release' file");
726 } catch (IOException e) {
727 e.printStackTrace();
728 return errorWithMessage("Failed to read 'release' file " + e);
729 }
730 }
731
732 private String jdkContainerized() {
733 String isEnabled = System.getenv("TEST_JDK_CONTAINERIZED");
734 return "" + "true".equalsIgnoreCase(isEnabled);
735 }
736
737 private String packagedModules() {
738 // Some jlink tests require packaged modules being present (jmods).
739 // For a runtime linkable image build packaged modules aren't present
740 try {
741 Path jmodsDir = Path.of(System.getProperty("java.home"), "jmods");
742 if (jmodsDir.toFile().exists()) {
743 return Boolean.TRUE.toString();
744 } else {
745 return Boolean.FALSE.toString();
746 }
747 } catch (Throwable t) {
748 return Boolean.FALSE.toString();
749 }
750 }
751
752 /**
753 * Checks if we are in <i>almost</i> out-of-box configuration, i.e. the flags
754 * which JVM is started with don't affect its behavior "significantly".
755 * {@code TEST_VM_FLAGLESS} enviroment variable can be used to force this
756 * method to return true or false and allow or reject any flags.
757 *
758 * @return true if there are no JVM flags
759 */
760 private String isFlagless() {
761 boolean result = true;
762 String flagless = System.getenv("TEST_VM_FLAGLESS");
763 if (flagless != null) {
764 return "" + "true".equalsIgnoreCase(flagless);
765 }
766
767 List<String> allFlags = allFlags().toList();
768
769 // check -XX flags
770 var ignoredXXFlags = Set.of(
771 // added by run-test framework
772 "MaxRAMPercentage",
773 // added by test environment
774 "CreateCoredumpOnCrash"
775 );
776 result &= allFlags.stream()
777 .filter(s -> s.startsWith("-XX:"))
778 // map to names:
779 // remove -XX:
780 .map(s -> s.substring(4))
781 // remove +/- from bool flags
782 .map(s -> s.charAt(0) == '+' || s.charAt(0) == '-' ? s.substring(1) : s)
783 // remove =.* from others
784 .map(s -> s.contains("=") ? s.substring(0, s.indexOf('=')) : s)
785 // skip known-to-be-there flags
786 .filter(s -> !ignoredXXFlags.contains(s))
787 .findAny()
788 .isEmpty();
789
790 // check -X flags
791 var ignoredXFlags = Set.of(
792 // default, yet still seen to be explicitly set
793 "mixed",
794 // -XmxmNNNm added by run-test framework for non-hotspot tests
795 "mx"
796 );
797 result &= allFlags.stream()
798 .filter(s -> s.startsWith("-X") && !s.startsWith("-XX:"))
799 // map to names:
800 // remove -X
801 .map(s -> s.substring(2))
802 // remove :.* from flags with values
803 .map(s -> s.contains(":") ? s.substring(0, s.indexOf(':')) : s)
804 // remove size like 4G, 768m which might be set for non-hotspot tests
805 .map(s -> s.replaceAll("(\\d+)[mMgGkK]", ""))
806 // skip known-to-be-there flags
807 .filter(s -> !ignoredXFlags.contains(s))
808 .findAny()
809 .isEmpty();
810
811 return "" + result;
812 }
813
814 private Stream<String> allFlags() {
815 return Stream.of((System.getProperty("test.vm.opts", "") + " " + System.getProperty("test.java.opts", "")).trim().split("\\s+"));
816 }
817
818 /*
819 * A string indicating the foreign linker that is currently being used. See jdk.internal.foreign.CABI
820 * for valid values.
821 *
822 * "FALLBACK" and "UNSUPPORTED" are special values. The former indicates the fallback linker is
823 * being used. The latter indicates an unsupported platform.
824 */
825 private String jdkForeignLinker() {
826 return String.valueOf(CABI.current());
827 }
828
829 private String isStatic() {
830 return Boolean.toString(WB.isStatic());
831 }
832
833 /**
834 * Dumps the map to the file if the file name is given as the property.
835 * This functionality could be helpful to know context in the real
836 * execution.
837 *
838 * @param map
839 */
840 protected static void dump(Map<String, String> map) {
841 String dumpFileName = System.getProperty("vmprops.dump");
842 if (dumpFileName == null) {
843 return;
844 }
845 List<String> lines = new ArrayList<>();
846 map.forEach((k, v) -> lines.add(k + ":" + v));
847 Collections.sort(lines);
848 try {
849 Files.write(Paths.get(dumpFileName), lines,
850 StandardOpenOption.APPEND, StandardOpenOption.CREATE);
851 } catch (IOException e) {
852 throw new RuntimeException("Failed to dump properties into '"
853 + dumpFileName + "'", e);
854 }
855 }
856
857 /**
858 * Log diagnostic message.
859 *
860 * @param msg
861 */
862 protected static void log(String msg) {
863 // Always log to a file.
864 logToFile(msg);
865
866 // Also log to stderr; guarded by property to avoid excessive verbosity.
867 // By jtreg design stderr produced here will be visible
868 // in the output of a parent process. Note: stdout should not be used
869 // for logging as jtreg parses that output directly and only echoes it
870 // in the event of a failure.
871 if (Boolean.getBoolean("jtreg.log.vmprops")) {
872 System.err.println("VMProps: " + msg);
873 }
874 }
875
876 /**
877 * Log diagnostic message to a file.
878 *
879 * @param msg
880 */
881 protected static void logToFile(String msg) {
882 String fileName = "./vmprops.log";
883 try {
884 Files.writeString(Paths.get(fileName), msg + "\n", Charset.forName("ISO-8859-1"),
885 StandardOpenOption.APPEND, StandardOpenOption.CREATE);
886 } catch (IOException e) {
887 throw new RuntimeException("Failed to log into '" + fileName + "'", e);
888 }
889 }
890
891 /**
892 * This method is for the testing purpose only.
893 *
894 * @param args
895 */
896 public static void main(String args[]) {
897 Map<String, String> map = new VMProps().call();
898 map.forEach((k, v) -> System.out.println(k + ": '" + v + "'"));
899 }
900 }