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   public  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   private native boolean isMonitorInflated0(Object obj);
 114   public         boolean isMonitorInflated(Object obj) {
 115     Objects.requireNonNull(obj);
 116     return isMonitorInflated0(obj);
 117   }
 118 
 119   public native void forceSafepoint();
 120 
 121   private native long getConstantPool0(Class<?> aClass);
 122   public         long getConstantPool(Class<?> aClass) {
 123     Objects.requireNonNull(aClass);
 124     return getConstantPool0(aClass);
 125   }
 126 
 127   private native int getConstantPoolCacheIndexTag0();
 128   public         int getConstantPoolCacheIndexTag() {
 129     return getConstantPoolCacheIndexTag0();
 130   }
 131 
 132   private native int getConstantPoolCacheLength0(Class<?> aClass);
 133   public         int getConstantPoolCacheLength(Class<?> aClass) {
 134     Objects.requireNonNull(aClass);
 135     return getConstantPoolCacheLength0(aClass);
 136   }
 137 
 138   private native int remapInstructionOperandFromCPCache0(Class<?> aClass, int index);
 139   public         int remapInstructionOperandFromCPCache(Class<?> aClass, int index) {
 140     Objects.requireNonNull(aClass);
 141     return remapInstructionOperandFromCPCache0(aClass, index);
 142   }
 143 
 144   private native int encodeConstantPoolIndyIndex0(int index);
 145   public         int encodeConstantPoolIndyIndex(int index) {
 146     return encodeConstantPoolIndyIndex0(index);
 147   }
 148 
 149   // JVMTI
 150   private native void addToBootstrapClassLoaderSearch0(String segment);
 151   public         void addToBootstrapClassLoaderSearch(String segment){
 152     Objects.requireNonNull(segment);
 153     addToBootstrapClassLoaderSearch0(segment);
 154   }
 155 
 156   private native void addToSystemClassLoaderSearch0(String segment);
 157   public         void addToSystemClassLoaderSearch(String segment) {
 158     Objects.requireNonNull(segment);
 159     addToSystemClassLoaderSearch0(segment);
 160   }
 161 
 162   // G1
 163   public native boolean g1InConcurrentMark();
 164   private native boolean g1IsHumongous0(Object o);
 165   public         boolean g1IsHumongous(Object o) {
 166     Objects.requireNonNull(o);
 167     return g1IsHumongous0(o);
 168   }
 169 
 170   private native boolean g1BelongsToHumongousRegion0(long adr);
 171   public         boolean g1BelongsToHumongousRegion(long adr) {
 172     if (adr == 0) {
 173       throw new IllegalArgumentException("adr argument should not be null");
 174     }
 175     return g1BelongsToHumongousRegion0(adr);
 176   }
 177 
 178 
 179   private native boolean g1BelongsToFreeRegion0(long adr);
 180   public         boolean g1BelongsToFreeRegion(long adr) {
 181     if (adr == 0) {
 182       throw new IllegalArgumentException("adr argument should not be null");
 183     }
 184     return g1BelongsToFreeRegion0(adr);
 185   }
 186 
 187   public native long    g1NumMaxRegions();
 188   public native long    g1NumFreeRegions();
 189   public native int     g1RegionSize();
 190   public native long    dramReservedStart();
 191   public native long    dramReservedEnd();
 192   public native long    nvdimmReservedStart();
 193   public native long    nvdimmReservedEnd();
 194   public native MemoryUsage g1AuxiliaryMemoryUsage();
 195   private  native Object[]    parseCommandLine0(String commandline, char delim, DiagnosticCommand[] args);
 196   public          Object[]    parseCommandLine(String commandline, char delim, DiagnosticCommand[] args) {
 197     Objects.requireNonNull(args);
 198     return parseCommandLine0(commandline, delim, args);
 199   }
 200 
 201   public native int g1ActiveMemoryNodeCount();
 202   public native int[] g1MemoryNodeIds();
 203 
 204   // Parallel GC
 205   public native long psVirtualSpaceAlignment();
 206   public native long psHeapGenerationAlignment();
 207 
 208   /**
 209    * Enumerates old regions with liveness less than specified and produces some statistics
 210    * @param liveness percent of region's liveness (live_objects / total_region_size * 100).
 211    * @return long[3] array where long[0] - total count of old regions
 212    *                             long[1] - total memory of old regions
 213    *                             long[2] - lowest estimation of total memory of old regions to be freed (non-full
 214    *                             regions are not included)
 215    */
 216   public native long[] g1GetMixedGCInfo(int liveness);
 217 
 218   // NMT
 219   public native long NMTMalloc(long size);
 220   public native void NMTFree(long mem);
 221   public native long NMTReserveMemory(long size);
 222   public native long NMTAttemptReserveMemoryAt(long addr, long size);
 223   public native void NMTCommitMemory(long addr, long size);
 224   public native void NMTUncommitMemory(long addr, long size);
 225   public native void NMTReleaseMemory(long addr, long size);
 226   public native long NMTMallocWithPseudoStack(long size, int index);
 227   public native long NMTMallocWithPseudoStackAndType(long size, int index, int type);
 228   public native boolean NMTChangeTrackingLevel();
 229   public native int NMTGetHashSize();
 230   public native long NMTNewArena(long initSize);
 231   public native void NMTFreeArena(long arena);
 232   public native void NMTArenaMalloc(long arena, long size);
 233 
 234   // Compiler
 235   public native boolean isC2OrJVMCIIncludedInVmBuild();
 236 
 237   public native int     matchesMethod(Executable method, String pattern);
 238   public native int     matchesInline(Executable method, String pattern);
 239   public native boolean shouldPrintAssembly(Executable method, int comp_level);
 240   public native int     deoptimizeFrames(boolean makeNotEntrant);
 241   public native void    deoptimizeAll();
 242 
 243   public        boolean isMethodCompiled(Executable method) {
 244     return isMethodCompiled(method, false /*not osr*/);
 245   }
 246   private native boolean isMethodCompiled0(Executable method, boolean isOsr);
 247   public         boolean isMethodCompiled(Executable method, boolean isOsr){
 248     Objects.requireNonNull(method);
 249     return isMethodCompiled0(method, isOsr);
 250   }
 251   public        boolean isMethodCompilable(Executable method) {
 252     return isMethodCompilable(method, -2 /*any*/);
 253   }
 254   public        boolean isMethodCompilable(Executable method, int compLevel) {
 255     return isMethodCompilable(method, compLevel, false /*not osr*/);
 256   }
 257   private native boolean isMethodCompilable0(Executable method, int compLevel, boolean isOsr);
 258   public         boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr) {
 259     Objects.requireNonNull(method);
 260     return isMethodCompilable0(method, compLevel, isOsr);
 261   }
 262   private native boolean isMethodQueuedForCompilation0(Executable method);
 263   public         boolean isMethodQueuedForCompilation(Executable method) {
 264     Objects.requireNonNull(method);
 265     return isMethodQueuedForCompilation0(method);
 266   }
 267   // Determine if the compiler corresponding to the compilation level 'compLevel'
 268   // and to the compilation context 'compilation_context' provides an intrinsic
 269   // for the method 'method'. An intrinsic is available for method 'method' if:
 270   //  - the intrinsic is enabled (by using the appropriate command-line flag) and
 271   //  - the platform on which the VM is running provides the instructions necessary
 272   //    for the compiler to generate the intrinsic code.
 273   //
 274   // The compilation context is related to using the DisableIntrinsic flag on a
 275   // per-method level, see hotspot/src/share/vm/compiler/abstractCompiler.hpp
 276   // for more details.
 277   public boolean isIntrinsicAvailable(Executable method,
 278                                       Executable compilationContext,
 279                                       int compLevel) {
 280       Objects.requireNonNull(method);
 281       return isIntrinsicAvailable0(method, compilationContext, compLevel);
 282   }
 283   // If usage of the DisableIntrinsic flag is not expected (or the usage can be ignored),
 284   // use the below method that does not require the compilation context as argument.
 285   public boolean isIntrinsicAvailable(Executable method, int compLevel) {
 286       return isIntrinsicAvailable(method, null, compLevel);
 287   }
 288   private native boolean isIntrinsicAvailable0(Executable method,
 289                                                Executable compilationContext,
 290                                                int compLevel);
 291   public        int     deoptimizeMethod(Executable method) {
 292     return deoptimizeMethod(method, false /*not osr*/);
 293   }
 294   private native int     deoptimizeMethod0(Executable method, boolean isOsr);
 295   public         int     deoptimizeMethod(Executable method, boolean isOsr) {
 296     Objects.requireNonNull(method);
 297     return deoptimizeMethod0(method, isOsr);
 298   }
 299   public        void    makeMethodNotCompilable(Executable method) {
 300     makeMethodNotCompilable(method, -2 /*any*/);
 301   }
 302   public        void    makeMethodNotCompilable(Executable method, int compLevel) {
 303     makeMethodNotCompilable(method, compLevel, false /*not osr*/);
 304   }
 305   private native void    makeMethodNotCompilable0(Executable method, int compLevel, boolean isOsr);
 306   public         void    makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr) {
 307     Objects.requireNonNull(method);
 308     makeMethodNotCompilable0(method, compLevel, isOsr);
 309   }
 310   public        int     getMethodCompilationLevel(Executable method) {
 311     return getMethodCompilationLevel(method, false /*not ost*/);
 312   }
 313   private native int     getMethodCompilationLevel0(Executable method, boolean isOsr);
 314   public         int     getMethodCompilationLevel(Executable method, boolean isOsr) {
 315     Objects.requireNonNull(method);
 316     return getMethodCompilationLevel0(method, isOsr);
 317   }
 318   private native boolean testSetDontInlineMethod0(Executable method, boolean value);
 319   public         boolean testSetDontInlineMethod(Executable method, boolean value) {
 320     Objects.requireNonNull(method);
 321     return testSetDontInlineMethod0(method, value);
 322   }
 323   public        int     getCompileQueuesSize() {
 324     return getCompileQueueSize(-2 /*any*/);
 325   }
 326   public native int     getCompileQueueSize(int compLevel);
 327   private native boolean testSetForceInlineMethod0(Executable method, boolean value);
 328   public         boolean testSetForceInlineMethod(Executable method, boolean value) {
 329     Objects.requireNonNull(method);
 330     return testSetForceInlineMethod0(method, value);
 331   }
 332   public        boolean enqueueMethodForCompilation(Executable method, int compLevel) {
 333     return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/);
 334   }
 335   private native boolean enqueueMethodForCompilation0(Executable method, int compLevel, int entry_bci);
 336   public  boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci) {
 337     Objects.requireNonNull(method);
 338     return enqueueMethodForCompilation0(method, compLevel, entry_bci);
 339   }
 340   private native boolean enqueueInitializerForCompilation0(Class<?> aClass, int compLevel);
 341   public  boolean enqueueInitializerForCompilation(Class<?> aClass, int compLevel) {
 342     Objects.requireNonNull(aClass);
 343     return enqueueInitializerForCompilation0(aClass, compLevel);
 344   }
 345   private native void    clearMethodState0(Executable method);
 346   public  native void    markMethodProfiled(Executable method);
 347   public         void    clearMethodState(Executable method) {
 348     Objects.requireNonNull(method);
 349     clearMethodState0(method);
 350   }
 351   public native void    lockCompilation();
 352   public native void    unlockCompilation();
 353   private native int     getMethodEntryBci0(Executable method);
 354   public         int     getMethodEntryBci(Executable method) {
 355     Objects.requireNonNull(method);
 356     return getMethodEntryBci0(method);
 357   }
 358   private native Object[] getNMethod0(Executable method, boolean isOsr);
 359   public         Object[] getNMethod(Executable method, boolean isOsr) {
 360     Objects.requireNonNull(method);
 361     return getNMethod0(method, isOsr);
 362   }
 363   public native long    allocateCodeBlob(int size, int type);
 364   public        long    allocateCodeBlob(long size, int type) {
 365       int intSize = (int) size;
 366       if ((long) intSize != size || size < 0) {
 367           throw new IllegalArgumentException(
 368                 "size argument has illegal value " + size);
 369       }
 370       return allocateCodeBlob( intSize, type);
 371   }
 372   public native void    freeCodeBlob(long addr);
 373   public native void    forceNMethodSweep();
 374   public native Object[] getCodeHeapEntries(int type);
 375   public native int     getCompilationActivityMode();
 376   private native long getMethodData0(Executable method);
 377   public         long getMethodData(Executable method) {
 378     Objects.requireNonNull(method);
 379     return getMethodData0(method);
 380   }
 381   public native Object[] getCodeBlob(long addr);
 382 
 383   private native void clearInlineCaches0(boolean preserve_static_stubs);
 384   public void clearInlineCaches() {
 385     clearInlineCaches0(false);
 386   }
 387   public void clearInlineCaches(boolean preserve_static_stubs) {
 388     clearInlineCaches0(preserve_static_stubs);
 389   }
 390 
 391   // Intered strings
 392   public native boolean isInStringTable(String str);
 393 
 394   // Memory
 395   public native void readReservedMemory();
 396   public native long allocateMetaspace(ClassLoader classLoader, long size);
 397   public native void freeMetaspace(ClassLoader classLoader, long addr, long size);
 398   public native long incMetaspaceCapacityUntilGC(long increment);
 399   public native long metaspaceCapacityUntilGC();
 400   public native long metaspaceReserveAlignment();
 401 
 402   // Don't use these methods directly
 403   // Use sun.hotspot.gc.GC class instead.
 404   public native boolean isGCSupported(int name);
 405   public native boolean isGCSelected(int name);
 406   public native boolean isGCSelectedErgonomically();
 407 
 408   // Force Young GC
 409   public native void youngGC();
 410 
 411   // Force Full GC
 412   public native void fullGC();
 413 
 414   // Returns true if the current GC supports control of its concurrent
 415   // phase via requestConcurrentGCPhase().  If false, a request will
 416   // always fail.
 417   public native boolean supportsConcurrentGCPhaseControl();
 418 
 419   // Attempt to put the collector into the indicated concurrent phase,
 420   // and attempt to remain in that state until a new request is made.
 421   //
 422   // Returns immediately if already in the requested phase.
 423   // Otherwise, waits until the phase is reached.
 424   //
 425   // Throws IllegalStateException if unsupported by the current collector.
 426   // Throws NullPointerException if phase is null.
 427   // Throws IllegalArgumentException if phase is not valid for the current collector.
 428   public void requestConcurrentGCPhase(String phase) {
 429     if (!supportsConcurrentGCPhaseControl()) {
 430       throw new IllegalStateException("Concurrent GC phase control not supported");
 431     } else if (phase == null) {
 432       throw new NullPointerException("null phase");
 433     } else if (!requestConcurrentGCPhase0(phase)) {
 434       throw new IllegalArgumentException("Unknown concurrent GC phase: " + phase);
 435     }
 436   }
 437 
 438   // Helper for requestConcurrentGCPhase().  Returns true if request
 439   // succeeded, false if the phase is invalid.
 440   private native boolean requestConcurrentGCPhase0(String phase);
 441 
 442   // Method tries to start concurrent mark cycle.
 443   // It returns false if CM Thread is always in concurrent cycle.
 444   public native boolean g1StartConcMarkCycle();
 445 
 446   // Tests on ReservedSpace/VirtualSpace classes
 447   public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
 448   public native void runMemoryUnitTests();
 449   public native void readFromNoaccessArea();
 450   public native long getThreadStackSize();
 451   public native long getThreadRemainingStackSize();
 452 
 453   // CPU features
 454   public native String getCPUFeatures();
 455 
 456   // VM flags
 457   public native boolean isConstantVMFlag(String name);
 458   public native boolean isLockedVMFlag(String name);
 459   public native void    setBooleanVMFlag(String name, boolean value);
 460   public native void    setIntVMFlag(String name, long value);
 461   public native void    setUintVMFlag(String name, long value);
 462   public native void    setIntxVMFlag(String name, long value);
 463   public native void    setUintxVMFlag(String name, long value);
 464   public native void    setUint64VMFlag(String name, long value);
 465   public native void    setSizeTVMFlag(String name, long value);
 466   public native void    setStringVMFlag(String name, String value);
 467   public native void    setDoubleVMFlag(String name, double value);
 468   public native Boolean getBooleanVMFlag(String name);
 469   public native Long    getIntVMFlag(String name);
 470   public native Long    getUintVMFlag(String name);
 471   public native Long    getIntxVMFlag(String name);
 472   public native Long    getUintxVMFlag(String name);
 473   public native Long    getUint64VMFlag(String name);
 474   public native Long    getSizeTVMFlag(String name);
 475   public native String  getStringVMFlag(String name);
 476   public native Double  getDoubleVMFlag(String name);
 477   private final List<Function<String,Object>> flagsGetters = Arrays.asList(
 478     this::getBooleanVMFlag, this::getIntVMFlag, this::getUintVMFlag,
 479     this::getIntxVMFlag, this::getUintxVMFlag, this::getUint64VMFlag,
 480     this::getSizeTVMFlag, this::getStringVMFlag, this::getDoubleVMFlag);
 481 
 482   public Object getVMFlag(String name) {
 483     return flagsGetters.stream()
 484                        .map(f -> f.apply(name))
 485                        .filter(x -> x != null)
 486                        .findAny()
 487                        .orElse(null);
 488   }
 489 
 490   // Jigsaw
 491   public native void DefineModule(Object module, boolean is_open, String version,
 492                                   String location, Object[] packages);
 493   public native void AddModuleExports(Object from_module, String pkg, Object to_module);
 494   public native void AddReadsModule(Object from_module, Object source_module);
 495   public native void AddModuleExportsToAllUnnamed(Object module, String pkg);
 496   public native void AddModuleExportsToAll(Object module, String pkg);
 497 
 498   public native int getOffsetForName0(String name);
 499   public int getOffsetForName(String name) throws Exception {
 500     int offset = getOffsetForName0(name);
 501     if (offset == -1) {
 502       throw new RuntimeException(name + " not found");
 503     }
 504     return offset;
 505   }
 506   public native Boolean getMethodBooleanOption(Executable method, String name);
 507   public native Long    getMethodIntxOption(Executable method, String name);
 508   public native Long    getMethodUintxOption(Executable method, String name);
 509   public native Double  getMethodDoubleOption(Executable method, String name);
 510   public native String  getMethodStringOption(Executable method, String name);
 511   private final List<BiFunction<Executable,String,Object>> methodOptionGetters
 512       = Arrays.asList(this::getMethodBooleanOption, this::getMethodIntxOption,
 513           this::getMethodUintxOption, this::getMethodDoubleOption,
 514           this::getMethodStringOption);
 515 
 516   public Object getMethodOption(Executable method, String name) {
 517     return methodOptionGetters.stream()
 518                               .map(f -> f.apply(method, name))
 519                               .filter(x -> x != null)
 520                               .findAny()
 521                               .orElse(null);
 522   }
 523 
 524   // Safepoint Checking
 525   public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue);
 526   public native void assertSpecialLock(boolean allowVMBlock, boolean safepointCheck);
 527 
 528   // Sharing & archiving
 529   public native String  getDefaultArchivePath();
 530   public native boolean cdsMemoryMappingFailed();
 531   public native boolean isSharingEnabled();
 532   public native boolean isShared(Object o);
 533   public native boolean isSharedClass(Class<?> c);
 534   public native boolean areSharedStringsIgnored();
 535   public native boolean isCDSIncludedInVmBuild();
 536   public native boolean isJFRIncludedInVmBuild();
 537   public native boolean isJavaHeapArchiveSupported();
 538   public native Object  getResolvedReferences(Class<?> c);
 539   public native void    linkClass(Class<?> c);
 540   public native boolean areOpenArchiveHeapObjectsMapped();
 541 
 542   // Compiler Directive
 543   public native int addCompilerDirective(String compDirect);
 544   public native void removeCompilerDirective(int count);
 545 
 546   // Handshakes
 547   public native int handshakeWalkStack(Thread t, boolean all_threads);
 548 
 549   // Returns true on linux if library has the noexecstack flag set.
 550   public native boolean checkLibSpecifiesNoexecstack(String libfilename);
 551 
 552   // Container testing
 553   public native boolean isContainerized();
 554   public native void printOsInfo();
 555 
 556   // Decoder
 557   public native void disableElfSectionCache();
 558 
 559   // Resolved Method Table
 560   public native long resolvedMethodItemsCount();
 561 
 562   // Protection Domain Table
 563   public native int protectionDomainRemovedCount();
 564 
 565   // Number of loaded AOT libraries
 566   public native int aotLibrariesCount();
 567 
 568   public native int getKlassMetadataSize(Class<?> c);
 569 }
--- EOF ---