1 /* 2 * Copyright (c) 2012, 2020, 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 sun.hotspot; 25 26 import java.lang.management.MemoryUsage; 27 import java.lang.reflect.Executable; 28 import java.util.Arrays; 29 import java.util.List; 30 import java.util.function.BiFunction; 31 import java.util.function.Function; 32 import java.security.BasicPermission; 33 import java.util.Objects; 34 35 import sun.hotspot.parser.DiagnosticCommand; 36 37 public class WhiteBox { 38 @SuppressWarnings("serial") 39 public static class WhiteBoxPermission extends BasicPermission { 40 public WhiteBoxPermission(String s) { 41 super(s); 42 } 43 } 44 45 private WhiteBox() {} 46 private static final WhiteBox instance = new WhiteBox(); 47 private static native void registerNatives(); 48 49 /** 50 * Returns the singleton WhiteBox instance. 51 * 52 * The returned WhiteBox object should be carefully guarded 53 * by the caller, since it can be used to read and write data 54 * at arbitrary memory addresses. It must never be passed to 55 * untrusted code. 56 */ 57 public synchronized static WhiteBox getWhiteBox() { 58 SecurityManager sm = System.getSecurityManager(); 59 if (sm != null) { 60 sm.checkPermission(new WhiteBoxPermission("getInstance")); 61 } 62 return instance; 63 } 64 65 static { 66 registerNatives(); 67 } 68 69 // Get the maximum heap size supporting COOPs 70 public native long getCompressedOopsMaxHeapSize(); 71 // Arguments 72 public native void printHeapSizes(); 73 74 // Memory 75 private native long getObjectAddress0(Object o); 76 public long getObjectAddress(Object o) { 77 Objects.requireNonNull(o); 78 return getObjectAddress0(o); 79 } 80 81 public native int getHeapOopSize(); 82 public native int getVMPageSize(); 83 public native long getVMAllocationGranularity(); 84 public native long getVMLargePageSize(); 85 public native long getHeapSpaceAlignment(); 86 public native long getHeapAlignment(); 87 88 private native boolean isObjectInOldGen0(Object o); 89 public boolean isObjectInOldGen(Object o) { 90 Objects.requireNonNull(o); 91 return isObjectInOldGen0(o); 92 } 93 94 private native long getObjectSize0(Object o); 95 public long getObjectSize(Object o) { 96 Objects.requireNonNull(o); 97 return getObjectSize0(o); 98 } 99 100 // Runtime 101 // Make sure class name is in the correct format 102 public int countAliveClasses(String name) { 103 return countAliveClasses0(name.replace('.', '/')); 104 } 105 private native int countAliveClasses0(String name); 106 107 public boolean isClassAlive(String name) { 108 return countAliveClasses(name) != 0; 109 } 110 111 public native int getSymbolRefcount(String name); 112 113 public native boolean deflateIdleMonitors(); 114 115 private native boolean isMonitorInflated0(Object obj); 116 public boolean isMonitorInflated(Object obj) { 117 Objects.requireNonNull(obj); 118 return isMonitorInflated0(obj); 119 } 120 121 public native void forceSafepoint(); 122 123 private native long getConstantPool0(Class<?> aClass); 124 public long getConstantPool(Class<?> aClass) { 125 Objects.requireNonNull(aClass); 126 return getConstantPool0(aClass); 127 } 128 129 private native int getConstantPoolCacheIndexTag0(); 130 public int getConstantPoolCacheIndexTag() { 131 return getConstantPoolCacheIndexTag0(); 132 } 133 134 private native int getConstantPoolCacheLength0(Class<?> aClass); 135 public int getConstantPoolCacheLength(Class<?> aClass) { 136 Objects.requireNonNull(aClass); 137 return getConstantPoolCacheLength0(aClass); 138 } 139 140 private native int remapInstructionOperandFromCPCache0(Class<?> aClass, int index); 141 public int remapInstructionOperandFromCPCache(Class<?> aClass, int index) { 142 Objects.requireNonNull(aClass); 143 return remapInstructionOperandFromCPCache0(aClass, index); 144 } 145 146 private native int encodeConstantPoolIndyIndex0(int index); 147 public int encodeConstantPoolIndyIndex(int index) { 148 return encodeConstantPoolIndyIndex0(index); 149 } 150 151 // JVMTI 152 private native void addToBootstrapClassLoaderSearch0(String segment); 153 public void addToBootstrapClassLoaderSearch(String segment){ 154 Objects.requireNonNull(segment); 155 addToBootstrapClassLoaderSearch0(segment); 156 } 157 158 private native void addToSystemClassLoaderSearch0(String segment); 159 public void addToSystemClassLoaderSearch(String segment) { 160 Objects.requireNonNull(segment); 161 addToSystemClassLoaderSearch0(segment); 162 } 163 164 // G1 165 public native boolean g1InConcurrentMark(); 166 private native boolean g1IsHumongous0(Object o); 167 public boolean g1IsHumongous(Object o) { 168 Objects.requireNonNull(o); 169 return g1IsHumongous0(o); 170 } 171 172 private native boolean g1BelongsToHumongousRegion0(long adr); 173 public boolean g1BelongsToHumongousRegion(long adr) { 174 if (adr == 0) { 175 throw new IllegalArgumentException("adr argument should not be null"); 176 } 177 return g1BelongsToHumongousRegion0(adr); 178 } 179 180 181 private native boolean g1BelongsToFreeRegion0(long adr); 182 public boolean g1BelongsToFreeRegion(long adr) { 183 if (adr == 0) { 184 throw new IllegalArgumentException("adr argument should not be null"); 185 } 186 return g1BelongsToFreeRegion0(adr); 187 } 188 189 public native long g1NumMaxRegions(); 190 public native long g1NumFreeRegions(); 191 public native int g1RegionSize(); 192 public native long dramReservedStart(); 193 public native long dramReservedEnd(); 194 public native long nvdimmReservedStart(); 195 public native long nvdimmReservedEnd(); 196 public native MemoryUsage g1AuxiliaryMemoryUsage(); 197 private native Object[] parseCommandLine0(String commandline, char delim, DiagnosticCommand[] args); 198 public Object[] parseCommandLine(String commandline, char delim, DiagnosticCommand[] args) { 199 Objects.requireNonNull(args); 200 return parseCommandLine0(commandline, delim, args); 201 } 202 203 public native int g1ActiveMemoryNodeCount(); 204 public native int[] g1MemoryNodeIds(); 205 206 // Parallel GC 207 public native long psVirtualSpaceAlignment(); 208 public native long psHeapGenerationAlignment(); 209 210 /** 211 * Enumerates old regions with liveness less than specified and produces some statistics 212 * @param liveness percent of region's liveness (live_objects / total_region_size * 100). 213 * @return long[3] array where long[0] - total count of old regions 214 * long[1] - total memory of old regions 215 * long[2] - lowest estimation of total memory of old regions to be freed (non-full 216 * regions are not included) 217 */ 218 public native long[] g1GetMixedGCInfo(int liveness); 219 220 // NMT 221 public native long NMTMalloc(long size); 222 public native void NMTFree(long mem); 223 public native long NMTReserveMemory(long size); 224 public native long NMTAttemptReserveMemoryAt(long addr, long size); 225 public native void NMTCommitMemory(long addr, long size); 226 public native void NMTUncommitMemory(long addr, long size); 227 public native void NMTReleaseMemory(long addr, long size); 228 public native long NMTMallocWithPseudoStack(long size, int index); 229 public native long NMTMallocWithPseudoStackAndType(long size, int index, int type); 230 public native boolean NMTChangeTrackingLevel(); 231 public native int NMTGetHashSize(); 232 public native long NMTNewArena(long initSize); 233 public native void NMTFreeArena(long arena); 234 public native void NMTArenaMalloc(long arena, long size); 235 236 // Compiler 237 public native boolean isC2OrJVMCIIncludedInVmBuild(); 238 239 public native int matchesMethod(Executable method, String pattern); 240 public native int matchesInline(Executable method, String pattern); 241 public native boolean shouldPrintAssembly(Executable method, int comp_level); 242 public native int deoptimizeFrames(boolean makeNotEntrant); 243 public native boolean isFrameDeoptimized(int depth); 244 public native void deoptimizeAll(); 245 246 public boolean isMethodCompiled(Executable method) { 247 return isMethodCompiled(method, false /*not osr*/); 248 } 249 private native boolean isMethodCompiled0(Executable method, boolean isOsr); 250 public boolean isMethodCompiled(Executable method, boolean isOsr){ 251 Objects.requireNonNull(method); 252 return isMethodCompiled0(method, isOsr); 253 } 254 public boolean isMethodCompilable(Executable method) { 255 return isMethodCompilable(method, -2 /*any*/); 256 } 257 public boolean isMethodCompilable(Executable method, int compLevel) { 258 return isMethodCompilable(method, compLevel, false /*not osr*/); 259 } 260 private native boolean isMethodCompilable0(Executable method, int compLevel, boolean isOsr); 261 public boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr) { 262 Objects.requireNonNull(method); 263 return isMethodCompilable0(method, compLevel, isOsr); 264 } 265 private native boolean isMethodQueuedForCompilation0(Executable method); 266 public boolean isMethodQueuedForCompilation(Executable method) { 267 Objects.requireNonNull(method); 268 return isMethodQueuedForCompilation0(method); 269 } 270 // Determine if the compiler corresponding to the compilation level 'compLevel' 271 // and to the compilation context 'compilation_context' provides an intrinsic 272 // for the method 'method'. An intrinsic is available for method 'method' if: 273 // - the intrinsic is enabled (by using the appropriate command-line flag) and 274 // - the platform on which the VM is running provides the instructions necessary 275 // for the compiler to generate the intrinsic code. 276 // 277 // The compilation context is related to using the DisableIntrinsic flag on a 278 // per-method level, see hotspot/src/share/vm/compiler/abstractCompiler.hpp 279 // for more details. 280 public boolean isIntrinsicAvailable(Executable method, 281 Executable compilationContext, 282 int compLevel) { 283 Objects.requireNonNull(method); 284 return isIntrinsicAvailable0(method, compilationContext, compLevel); 285 } 286 // If usage of the DisableIntrinsic flag is not expected (or the usage can be ignored), 287 // use the below method that does not require the compilation context as argument. 288 public boolean isIntrinsicAvailable(Executable method, int compLevel) { 289 return isIntrinsicAvailable(method, null, compLevel); 290 } 291 private native boolean isIntrinsicAvailable0(Executable method, 292 Executable compilationContext, 293 int compLevel); 294 public int deoptimizeMethod(Executable method) { 295 return deoptimizeMethod(method, false /*not osr*/); 296 } 297 private native int deoptimizeMethod0(Executable method, boolean isOsr); 298 public int deoptimizeMethod(Executable method, boolean isOsr) { 299 Objects.requireNonNull(method); 300 return deoptimizeMethod0(method, isOsr); 301 } 302 public void makeMethodNotCompilable(Executable method) { 303 makeMethodNotCompilable(method, -2 /*any*/); 304 } 305 public void makeMethodNotCompilable(Executable method, int compLevel) { 306 makeMethodNotCompilable(method, compLevel, false /*not osr*/); 307 } 308 private native void makeMethodNotCompilable0(Executable method, int compLevel, boolean isOsr); 309 public void makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr) { 310 Objects.requireNonNull(method); 311 makeMethodNotCompilable0(method, compLevel, isOsr); 312 } 313 public int getMethodCompilationLevel(Executable method) { 314 return getMethodCompilationLevel(method, false /*not ost*/); 315 } 316 private native int getMethodCompilationLevel0(Executable method, boolean isOsr); 317 public int getMethodCompilationLevel(Executable method, boolean isOsr) { 318 Objects.requireNonNull(method); 319 return getMethodCompilationLevel0(method, isOsr); 320 } 321 private native boolean testSetDontInlineMethod0(Executable method, boolean value); 322 public boolean testSetDontInlineMethod(Executable method, boolean value) { 323 Objects.requireNonNull(method); 324 return testSetDontInlineMethod0(method, value); 325 } 326 public int getCompileQueuesSize() { 327 return getCompileQueueSize(-2 /*any*/); 328 } 329 public native int getCompileQueueSize(int compLevel); 330 private native boolean testSetForceInlineMethod0(Executable method, boolean value); 331 public boolean testSetForceInlineMethod(Executable method, boolean value) { 332 Objects.requireNonNull(method); 333 return testSetForceInlineMethod0(method, value); 334 } 335 public boolean enqueueMethodForCompilation(Executable method, int compLevel) { 336 return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/); 337 } 338 private native boolean enqueueMethodForCompilation0(Executable method, int compLevel, int entry_bci); 339 public boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci) { 340 Objects.requireNonNull(method); 341 return enqueueMethodForCompilation0(method, compLevel, entry_bci); 342 } 343 private native boolean enqueueInitializerForCompilation0(Class<?> aClass, int compLevel); 344 public boolean enqueueInitializerForCompilation(Class<?> aClass, int compLevel) { 345 Objects.requireNonNull(aClass); 346 return enqueueInitializerForCompilation0(aClass, compLevel); 347 } 348 private native void clearMethodState0(Executable method); 349 public native void markMethodProfiled(Executable method); 350 public void clearMethodState(Executable method) { 351 Objects.requireNonNull(method); 352 clearMethodState0(method); 353 } 354 public native void lockCompilation(); 355 public native void unlockCompilation(); 356 private native int getMethodEntryBci0(Executable method); 357 public int getMethodEntryBci(Executable method) { 358 Objects.requireNonNull(method); 359 return getMethodEntryBci0(method); 360 } 361 private native Object[] getNMethod0(Executable method, boolean isOsr); 362 public Object[] getNMethod(Executable method, boolean isOsr) { 363 Objects.requireNonNull(method); 364 return getNMethod0(method, isOsr); 365 } 366 public native long allocateCodeBlob(int size, int type); 367 public long allocateCodeBlob(long size, int type) { 368 int intSize = (int) size; 369 if ((long) intSize != size || size < 0) { 370 throw new IllegalArgumentException( 371 "size argument has illegal value " + size); 372 } 373 return allocateCodeBlob( intSize, type); 374 } 375 public native void freeCodeBlob(long addr); 376 public native void forceNMethodSweep(); 377 public native Object[] getCodeHeapEntries(int type); 378 public native int getCompilationActivityMode(); 379 private native long getMethodData0(Executable method); 380 public long getMethodData(Executable method) { 381 Objects.requireNonNull(method); 382 return getMethodData0(method); 383 } 384 public native Object[] getCodeBlob(long addr); 385 386 private native void clearInlineCaches0(boolean preserve_static_stubs); 387 public void clearInlineCaches() { 388 clearInlineCaches0(false); 389 } 390 public void clearInlineCaches(boolean preserve_static_stubs) { 391 clearInlineCaches0(preserve_static_stubs); 392 } 393 394 // Intered strings 395 public native boolean isInStringTable(String str); 396 397 // Memory 398 public native void readReservedMemory(); 399 public native long allocateMetaspace(ClassLoader classLoader, long size); 400 public native void freeMetaspace(ClassLoader classLoader, long addr, long size); 401 public native long incMetaspaceCapacityUntilGC(long increment); 402 public native long metaspaceCapacityUntilGC(); 403 public native long metaspaceReserveAlignment(); 404 405 // Don't use these methods directly 406 // Use sun.hotspot.gc.GC class instead. 407 public native boolean isGCSupported(int name); 408 public native boolean isGCSelected(int name); 409 public native boolean isGCSelectedErgonomically(); 410 411 // Force Young GC 412 public native void youngGC(); 413 414 // Force Full GC 415 public native void fullGC(); 416 417 // Returns true if the current GC supports concurrent collection control. 418 public native boolean supportsConcurrentGCBreakpoints(); 419 420 private void checkConcurrentGCBreakpointsSupported() { 421 if (!supportsConcurrentGCBreakpoints()) { 422 throw new UnsupportedOperationException("Concurrent GC breakpoints not supported"); 423 } 424 } 425 426 private native void concurrentGCAcquireControl0(); 427 private native void concurrentGCReleaseControl0(); 428 private native void concurrentGCRunToIdle0(); 429 private native boolean concurrentGCRunTo0(String breakpoint); 430 431 private static boolean concurrentGCIsControlled = false; 432 private void checkConcurrentGCIsControlled() { 433 if (!concurrentGCIsControlled) { 434 throw new IllegalStateException("Not controlling concurrent GC"); 435 } 436 } 437 438 // All collectors supporting concurrent GC breakpoints are expected 439 // to provide at least the following breakpoints. 440 public final String AFTER_MARKING_STARTED = "AFTER MARKING STARTED"; 441 public final String BEFORE_MARKING_COMPLETED = "BEFORE MARKING COMPLETED"; 442 443 public void concurrentGCAcquireControl() { 444 checkConcurrentGCBreakpointsSupported(); 445 if (concurrentGCIsControlled) { 446 throw new IllegalStateException("Already controlling concurrent GC"); 447 } 448 concurrentGCAcquireControl0(); 449 concurrentGCIsControlled = true; 450 } 451 452 public void concurrentGCReleaseControl() { 453 checkConcurrentGCBreakpointsSupported(); 454 concurrentGCReleaseControl0(); 455 concurrentGCIsControlled = false; 456 } 457 458 // Keep concurrent GC idle. Release from breakpoint. 459 public void concurrentGCRunToIdle() { 460 checkConcurrentGCBreakpointsSupported(); 461 checkConcurrentGCIsControlled(); 462 concurrentGCRunToIdle0(); 463 } 464 465 // Allow concurrent GC to run to breakpoint. 466 // Throws IllegalStateException if reached end of cycle first. 467 public void concurrentGCRunTo(String breakpoint) { 468 concurrentGCRunTo(breakpoint, true); 469 } 470 471 // Allow concurrent GC to run to breakpoint. 472 // Returns true if reached breakpoint. If reached end of cycle first, 473 // then throws IllegalStateException if errorIfFail is true, returning 474 // false otherwise. 475 public boolean concurrentGCRunTo(String breakpoint, boolean errorIfFail) { 476 checkConcurrentGCBreakpointsSupported(); 477 checkConcurrentGCIsControlled(); 478 if (breakpoint == null) { 479 throw new NullPointerException("null breakpoint"); 480 } else if (concurrentGCRunTo0(breakpoint)) { 481 return true; 482 } else if (errorIfFail) { 483 throw new IllegalStateException("Missed requested breakpoint \"" + breakpoint + "\""); 484 } else { 485 return false; 486 } 487 } 488 489 // Method tries to start concurrent mark cycle. 490 // It returns false if CM Thread is always in concurrent cycle. 491 public native boolean g1StartConcMarkCycle(); 492 493 // Tests on ReservedSpace/VirtualSpace classes 494 public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations); 495 public native void runMemoryUnitTests(); 496 public native void readFromNoaccessArea(); 497 public native long getThreadStackSize(); 498 public native long getThreadRemainingStackSize(); 499 500 // CPU features 501 public native String getCPUFeatures(); 502 503 // VM flags 504 public native boolean isConstantVMFlag(String name); 505 public native boolean isLockedVMFlag(String name); 506 public native void setBooleanVMFlag(String name, boolean value); 507 public native void setIntVMFlag(String name, long value); 508 public native void setUintVMFlag(String name, long value); 509 public native void setIntxVMFlag(String name, long value); 510 public native void setUintxVMFlag(String name, long value); 511 public native void setUint64VMFlag(String name, long value); 512 public native void setSizeTVMFlag(String name, long value); 513 public native void setStringVMFlag(String name, String value); 514 public native void setDoubleVMFlag(String name, double value); 515 public native Boolean getBooleanVMFlag(String name); 516 public native Long getIntVMFlag(String name); 517 public native Long getUintVMFlag(String name); 518 public native Long getIntxVMFlag(String name); 519 public native Long getUintxVMFlag(String name); 520 public native Long getUint64VMFlag(String name); 521 public native Long getSizeTVMFlag(String name); 522 public native String getStringVMFlag(String name); 523 public native Double getDoubleVMFlag(String name); 524 private final List<Function<String,Object>> flagsGetters = Arrays.asList( 525 this::getBooleanVMFlag, this::getIntVMFlag, this::getUintVMFlag, 526 this::getIntxVMFlag, this::getUintxVMFlag, this::getUint64VMFlag, 527 this::getSizeTVMFlag, this::getStringVMFlag, this::getDoubleVMFlag); 528 529 public Object getVMFlag(String name) { 530 return flagsGetters.stream() 531 .map(f -> f.apply(name)) 532 .filter(x -> x != null) 533 .findAny() 534 .orElse(null); 535 } 536 537 // Jigsaw 538 public native void DefineModule(Object module, boolean is_open, String version, 539 String location, Object[] packages); 540 public native void AddModuleExports(Object from_module, String pkg, Object to_module); 541 public native void AddReadsModule(Object from_module, Object source_module); 542 public native void AddModuleExportsToAllUnnamed(Object module, String pkg); 543 public native void AddModuleExportsToAll(Object module, String pkg); 544 545 public native int getOffsetForName0(String name); 546 public int getOffsetForName(String name) throws Exception { 547 int offset = getOffsetForName0(name); 548 if (offset == -1) { 549 throw new RuntimeException(name + " not found"); 550 } 551 return offset; 552 } 553 public native Boolean getMethodBooleanOption(Executable method, String name); 554 public native Long getMethodIntxOption(Executable method, String name); 555 public native Long getMethodUintxOption(Executable method, String name); 556 public native Double getMethodDoubleOption(Executable method, String name); 557 public native String getMethodStringOption(Executable method, String name); 558 private final List<BiFunction<Executable,String,Object>> methodOptionGetters 559 = Arrays.asList(this::getMethodBooleanOption, this::getMethodIntxOption, 560 this::getMethodUintxOption, this::getMethodDoubleOption, 561 this::getMethodStringOption); 562 563 public Object getMethodOption(Executable method, String name) { 564 return methodOptionGetters.stream() 565 .map(f -> f.apply(method, name)) 566 .filter(x -> x != null) 567 .findAny() 568 .orElse(null); 569 } 570 571 // Safepoint Checking 572 public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue); 573 public native void assertSpecialLock(boolean allowVMBlock, boolean safepointCheck); 574 575 // Sharing & archiving 576 public native String getDefaultArchivePath(); 577 public native boolean cdsMemoryMappingFailed(); 578 public native boolean isSharingEnabled(); 579 public native boolean isShared(Object o); 580 public native boolean isSharedClass(Class<?> c); 581 public native boolean areSharedStringsIgnored(); 582 public native boolean isCDSIncludedInVmBuild(); 583 public native boolean isJFRIncludedInVmBuild(); 584 public native boolean isJavaHeapArchiveSupported(); 585 public native Object getResolvedReferences(Class<?> c); 586 public native void linkClass(Class<?> c); 587 public native boolean areOpenArchiveHeapObjectsMapped(); 588 589 // Compiler Directive 590 public native int addCompilerDirective(String compDirect); 591 public native void removeCompilerDirective(int count); 592 593 // Handshakes 594 public native int handshakeWalkStack(Thread t, boolean all_threads); 595 596 // Returns true on linux if library has the noexecstack flag set. 597 public native boolean checkLibSpecifiesNoexecstack(String libfilename); 598 599 // Container testing 600 public native boolean isContainerized(); 601 public native int validateCgroup(String procCgroups, 602 String procSelfCgroup, 603 String procSelfMountinfo); 604 public native void printOsInfo(); 605 606 // Decoder 607 public native void disableElfSectionCache(); 608 609 // Resolved Method Table 610 public native long resolvedMethodItemsCount(); 611 612 // Protection Domain Table 613 public native int protectionDomainRemovedCount(); 614 615 // Number of loaded AOT libraries 616 public native int aotLibrariesCount(); 617 618 public native int getKlassMetadataSize(Class<?> c); 619 620 // ThreadSMR GC safety check for threadObj 621 public native void checkThreadObjOfTerminatingThread(Thread target); 622 }