1 /* 2 * Copyright (c) 2012, 2019, 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 { WhiteBoxPermission(String s)40 public WhiteBoxPermission(String s) { 41 super(s); 42 } 43 } 44 WhiteBox()45 private WhiteBox() {} 46 private static final WhiteBox instance = new WhiteBox(); registerNatives()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 */ getWhiteBox()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 { registerNatives()66 registerNatives(); 67 } 68 69 // Get the maximum heap size supporting COOPs getCompressedOopsMaxHeapSize()70 public native long getCompressedOopsMaxHeapSize(); 71 // Arguments printHeapSizes()72 public native void printHeapSizes(); 73 74 // Memory getObjectAddress0(Object o)75 private native long getObjectAddress0(Object o); getObjectAddress(Object o)76 public long getObjectAddress(Object o) { 77 Objects.requireNonNull(o); 78 return getObjectAddress0(o); 79 } 80 getHeapOopSize()81 public native int getHeapOopSize(); getVMPageSize()82 public native int getVMPageSize(); getVMAllocationGranularity()83 public native long getVMAllocationGranularity(); getVMLargePageSize()84 public native long getVMLargePageSize(); getHeapSpaceAlignment()85 public native long getHeapSpaceAlignment(); getHeapAlignment()86 public native long getHeapAlignment(); 87 isObjectInOldGen0(Object o)88 private native boolean isObjectInOldGen0(Object o); isObjectInOldGen(Object o)89 public boolean isObjectInOldGen(Object o) { 90 Objects.requireNonNull(o); 91 return isObjectInOldGen0(o); 92 } 93 getObjectSize0(Object o)94 private native long getObjectSize0(Object o); getObjectSize(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 isClassAlive(String name)102 public boolean isClassAlive(String name) { 103 return isClassAlive0(name.replace('.', '/')); 104 } isClassAlive0(String name)105 private native boolean isClassAlive0(String name); getSymbolRefcount(String name)106 public native int getSymbolRefcount(String name); 107 isMonitorInflated0(Object obj)108 private native boolean isMonitorInflated0(Object obj); isMonitorInflated(Object obj)109 public boolean isMonitorInflated(Object obj) { 110 Objects.requireNonNull(obj); 111 return isMonitorInflated0(obj); 112 } 113 forceSafepoint()114 public native void forceSafepoint(); 115 getConstantPool0(Class<?> aClass)116 private native long getConstantPool0(Class<?> aClass); getConstantPool(Class<?> aClass)117 public long getConstantPool(Class<?> aClass) { 118 Objects.requireNonNull(aClass); 119 return getConstantPool0(aClass); 120 } 121 getConstantPoolCacheIndexTag0()122 private native int getConstantPoolCacheIndexTag0(); getConstantPoolCacheIndexTag()123 public int getConstantPoolCacheIndexTag() { 124 return getConstantPoolCacheIndexTag0(); 125 } 126 getConstantPoolCacheLength0(Class<?> aClass)127 private native int getConstantPoolCacheLength0(Class<?> aClass); getConstantPoolCacheLength(Class<?> aClass)128 public int getConstantPoolCacheLength(Class<?> aClass) { 129 Objects.requireNonNull(aClass); 130 return getConstantPoolCacheLength0(aClass); 131 } 132 remapInstructionOperandFromCPCache0(Class<?> aClass, int index)133 private native int remapInstructionOperandFromCPCache0(Class<?> aClass, int index); remapInstructionOperandFromCPCache(Class<?> aClass, int index)134 public int remapInstructionOperandFromCPCache(Class<?> aClass, int index) { 135 Objects.requireNonNull(aClass); 136 return remapInstructionOperandFromCPCache0(aClass, index); 137 } 138 encodeConstantPoolIndyIndex0(int index)139 private native int encodeConstantPoolIndyIndex0(int index); encodeConstantPoolIndyIndex(int index)140 public int encodeConstantPoolIndyIndex(int index) { 141 return encodeConstantPoolIndyIndex0(index); 142 } 143 144 // JVMTI addToBootstrapClassLoaderSearch0(String segment)145 private native void addToBootstrapClassLoaderSearch0(String segment); addToBootstrapClassLoaderSearch(String segment)146 public void addToBootstrapClassLoaderSearch(String segment){ 147 Objects.requireNonNull(segment); 148 addToBootstrapClassLoaderSearch0(segment); 149 } 150 addToSystemClassLoaderSearch0(String segment)151 private native void addToSystemClassLoaderSearch0(String segment); addToSystemClassLoaderSearch(String segment)152 public void addToSystemClassLoaderSearch(String segment) { 153 Objects.requireNonNull(segment); 154 addToSystemClassLoaderSearch0(segment); 155 } 156 157 // G1 g1InConcurrentMark()158 public native boolean g1InConcurrentMark(); g1IsHumongous0(Object o)159 private native boolean g1IsHumongous0(Object o); g1IsHumongous(Object o)160 public boolean g1IsHumongous(Object o) { 161 Objects.requireNonNull(o); 162 return g1IsHumongous0(o); 163 } 164 g1BelongsToHumongousRegion0(long adr)165 private native boolean g1BelongsToHumongousRegion0(long adr); g1BelongsToHumongousRegion(long adr)166 public boolean g1BelongsToHumongousRegion(long adr) { 167 if (adr == 0) { 168 throw new IllegalArgumentException("adr argument should not be null"); 169 } 170 return g1BelongsToHumongousRegion0(adr); 171 } 172 173 g1BelongsToFreeRegion0(long adr)174 private native boolean g1BelongsToFreeRegion0(long adr); g1BelongsToFreeRegion(long adr)175 public boolean g1BelongsToFreeRegion(long adr) { 176 if (adr == 0) { 177 throw new IllegalArgumentException("adr argument should not be null"); 178 } 179 return g1BelongsToFreeRegion0(adr); 180 } 181 g1NumMaxRegions()182 public native long g1NumMaxRegions(); g1NumFreeRegions()183 public native long g1NumFreeRegions(); g1RegionSize()184 public native int g1RegionSize(); g1AuxiliaryMemoryUsage()185 public native MemoryUsage g1AuxiliaryMemoryUsage(); parseCommandLine0(String commandline, char delim, DiagnosticCommand[] args)186 private native Object[] parseCommandLine0(String commandline, char delim, DiagnosticCommand[] args); parseCommandLine(String commandline, char delim, DiagnosticCommand[] args)187 public Object[] parseCommandLine(String commandline, char delim, DiagnosticCommand[] args) { 188 Objects.requireNonNull(args); 189 return parseCommandLine0(commandline, delim, args); 190 } 191 192 // Parallel GC psVirtualSpaceAlignment()193 public native long psVirtualSpaceAlignment(); psHeapGenerationAlignment()194 public native long psHeapGenerationAlignment(); 195 196 /** 197 * Enumerates old regions with liveness less than specified and produces some statistics 198 * @param liveness percent of region's liveness (live_objects / total_region_size * 100). 199 * @return long[3] array where long[0] - total count of old regions 200 * long[1] - total memory of old regions 201 * long[2] - lowest estimation of total memory of old regions to be freed (non-full 202 * regions are not included) 203 */ g1GetMixedGCInfo(int liveness)204 public native long[] g1GetMixedGCInfo(int liveness); 205 206 // NMT NMTMalloc(long size)207 public native long NMTMalloc(long size); NMTFree(long mem)208 public native void NMTFree(long mem); NMTReserveMemory(long size)209 public native long NMTReserveMemory(long size); NMTAttemptReserveMemoryAt(long addr, long size)210 public native long NMTAttemptReserveMemoryAt(long addr, long size); NMTCommitMemory(long addr, long size)211 public native void NMTCommitMemory(long addr, long size); NMTUncommitMemory(long addr, long size)212 public native void NMTUncommitMemory(long addr, long size); NMTReleaseMemory(long addr, long size)213 public native void NMTReleaseMemory(long addr, long size); NMTMallocWithPseudoStack(long size, int index)214 public native long NMTMallocWithPseudoStack(long size, int index); NMTMallocWithPseudoStackAndType(long size, int index, int type)215 public native long NMTMallocWithPseudoStackAndType(long size, int index, int type); NMTChangeTrackingLevel()216 public native boolean NMTChangeTrackingLevel(); NMTGetHashSize()217 public native int NMTGetHashSize(); NMTNewArena(long initSize)218 public native long NMTNewArena(long initSize); NMTFreeArena(long arena)219 public native void NMTFreeArena(long arena); NMTArenaMalloc(long arena, long size)220 public native void NMTArenaMalloc(long arena, long size); 221 222 // Compiler matchesMethod(Executable method, String pattern)223 public native int matchesMethod(Executable method, String pattern); matchesInline(Executable method, String pattern)224 public native int matchesInline(Executable method, String pattern); shouldPrintAssembly(Executable method, int comp_level)225 public native boolean shouldPrintAssembly(Executable method, int comp_level); deoptimizeFrames(boolean makeNotEntrant)226 public native int deoptimizeFrames(boolean makeNotEntrant); deoptimizeAll()227 public native void deoptimizeAll(); 228 isMethodCompiled(Executable method)229 public boolean isMethodCompiled(Executable method) { 230 return isMethodCompiled(method, false /*not osr*/); 231 } isMethodCompiled0(Executable method, boolean isOsr)232 private native boolean isMethodCompiled0(Executable method, boolean isOsr); isMethodCompiled(Executable method, boolean isOsr)233 public boolean isMethodCompiled(Executable method, boolean isOsr){ 234 Objects.requireNonNull(method); 235 return isMethodCompiled0(method, isOsr); 236 } isMethodCompilable(Executable method)237 public boolean isMethodCompilable(Executable method) { 238 return isMethodCompilable(method, -2 /*any*/); 239 } isMethodCompilable(Executable method, int compLevel)240 public boolean isMethodCompilable(Executable method, int compLevel) { 241 return isMethodCompilable(method, compLevel, false /*not osr*/); 242 } isMethodCompilable0(Executable method, int compLevel, boolean isOsr)243 private native boolean isMethodCompilable0(Executable method, int compLevel, boolean isOsr); isMethodCompilable(Executable method, int compLevel, boolean isOsr)244 public boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr) { 245 Objects.requireNonNull(method); 246 return isMethodCompilable0(method, compLevel, isOsr); 247 } isMethodQueuedForCompilation0(Executable method)248 private native boolean isMethodQueuedForCompilation0(Executable method); isMethodQueuedForCompilation(Executable method)249 public boolean isMethodQueuedForCompilation(Executable method) { 250 Objects.requireNonNull(method); 251 return isMethodQueuedForCompilation0(method); 252 } 253 // Determine if the compiler corresponding to the compilation level 'compLevel' 254 // and to the compilation context 'compilation_context' provides an intrinsic 255 // for the method 'method'. An intrinsic is available for method 'method' if: 256 // - the intrinsic is enabled (by using the appropriate command-line flag) and 257 // - the platform on which the VM is running provides the instructions necessary 258 // for the compiler to generate the intrinsic code. 259 // 260 // The compilation context is related to using the DisableIntrinsic flag on a 261 // per-method level, see hotspot/src/share/vm/compiler/abstractCompiler.hpp 262 // for more details. isIntrinsicAvailable(Executable method, Executable compilationContext, int compLevel)263 public boolean isIntrinsicAvailable(Executable method, 264 Executable compilationContext, 265 int compLevel) { 266 Objects.requireNonNull(method); 267 return isIntrinsicAvailable0(method, compilationContext, compLevel); 268 } 269 // If usage of the DisableIntrinsic flag is not expected (or the usage can be ignored), 270 // use the below method that does not require the compilation context as argument. isIntrinsicAvailable(Executable method, int compLevel)271 public boolean isIntrinsicAvailable(Executable method, int compLevel) { 272 return isIntrinsicAvailable(method, null, compLevel); 273 } isIntrinsicAvailable0(Executable method, Executable compilationContext, int compLevel)274 private native boolean isIntrinsicAvailable0(Executable method, 275 Executable compilationContext, 276 int compLevel); deoptimizeMethod(Executable method)277 public int deoptimizeMethod(Executable method) { 278 return deoptimizeMethod(method, false /*not osr*/); 279 } deoptimizeMethod0(Executable method, boolean isOsr)280 private native int deoptimizeMethod0(Executable method, boolean isOsr); deoptimizeMethod(Executable method, boolean isOsr)281 public int deoptimizeMethod(Executable method, boolean isOsr) { 282 Objects.requireNonNull(method); 283 return deoptimizeMethod0(method, isOsr); 284 } makeMethodNotCompilable(Executable method)285 public void makeMethodNotCompilable(Executable method) { 286 makeMethodNotCompilable(method, -2 /*any*/); 287 } makeMethodNotCompilable(Executable method, int compLevel)288 public void makeMethodNotCompilable(Executable method, int compLevel) { 289 makeMethodNotCompilable(method, compLevel, false /*not osr*/); 290 } makeMethodNotCompilable0(Executable method, int compLevel, boolean isOsr)291 private native void makeMethodNotCompilable0(Executable method, int compLevel, boolean isOsr); makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr)292 public void makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr) { 293 Objects.requireNonNull(method); 294 makeMethodNotCompilable0(method, compLevel, isOsr); 295 } getMethodCompilationLevel(Executable method)296 public int getMethodCompilationLevel(Executable method) { 297 return getMethodCompilationLevel(method, false /*not ost*/); 298 } getMethodCompilationLevel0(Executable method, boolean isOsr)299 private native int getMethodCompilationLevel0(Executable method, boolean isOsr); getMethodCompilationLevel(Executable method, boolean isOsr)300 public int getMethodCompilationLevel(Executable method, boolean isOsr) { 301 Objects.requireNonNull(method); 302 return getMethodCompilationLevel0(method, isOsr); 303 } testSetDontInlineMethod0(Executable method, boolean value)304 private native boolean testSetDontInlineMethod0(Executable method, boolean value); testSetDontInlineMethod(Executable method, boolean value)305 public boolean testSetDontInlineMethod(Executable method, boolean value) { 306 Objects.requireNonNull(method); 307 return testSetDontInlineMethod0(method, value); 308 } getCompileQueuesSize()309 public int getCompileQueuesSize() { 310 return getCompileQueueSize(-2 /*any*/); 311 } getCompileQueueSize(int compLevel)312 public native int getCompileQueueSize(int compLevel); testSetForceInlineMethod0(Executable method, boolean value)313 private native boolean testSetForceInlineMethod0(Executable method, boolean value); testSetForceInlineMethod(Executable method, boolean value)314 public boolean testSetForceInlineMethod(Executable method, boolean value) { 315 Objects.requireNonNull(method); 316 return testSetForceInlineMethod0(method, value); 317 } enqueueMethodForCompilation(Executable method, int compLevel)318 public boolean enqueueMethodForCompilation(Executable method, int compLevel) { 319 return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/); 320 } enqueueMethodForCompilation0(Executable method, int compLevel, int entry_bci)321 private native boolean enqueueMethodForCompilation0(Executable method, int compLevel, int entry_bci); enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci)322 public boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci) { 323 Objects.requireNonNull(method); 324 return enqueueMethodForCompilation0(method, compLevel, entry_bci); 325 } enqueueInitializerForCompilation0(Class<?> aClass, int compLevel)326 private native boolean enqueueInitializerForCompilation0(Class<?> aClass, int compLevel); enqueueInitializerForCompilation(Class<?> aClass, int compLevel)327 public boolean enqueueInitializerForCompilation(Class<?> aClass, int compLevel) { 328 Objects.requireNonNull(aClass); 329 return enqueueInitializerForCompilation0(aClass, compLevel); 330 } clearMethodState0(Executable method)331 private native void clearMethodState0(Executable method); markMethodProfiled(Executable method)332 public native void markMethodProfiled(Executable method); clearMethodState(Executable method)333 public void clearMethodState(Executable method) { 334 Objects.requireNonNull(method); 335 clearMethodState0(method); 336 } lockCompilation()337 public native void lockCompilation(); unlockCompilation()338 public native void unlockCompilation(); getMethodEntryBci0(Executable method)339 private native int getMethodEntryBci0(Executable method); getMethodEntryBci(Executable method)340 public int getMethodEntryBci(Executable method) { 341 Objects.requireNonNull(method); 342 return getMethodEntryBci0(method); 343 } getNMethod0(Executable method, boolean isOsr)344 private native Object[] getNMethod0(Executable method, boolean isOsr); getNMethod(Executable method, boolean isOsr)345 public Object[] getNMethod(Executable method, boolean isOsr) { 346 Objects.requireNonNull(method); 347 return getNMethod0(method, isOsr); 348 } allocateCodeBlob(int size, int type)349 public native long allocateCodeBlob(int size, int type); allocateCodeBlob(long size, int type)350 public long allocateCodeBlob(long size, int type) { 351 int intSize = (int) size; 352 if ((long) intSize != size || size < 0) { 353 throw new IllegalArgumentException( 354 "size argument has illegal value " + size); 355 } 356 return allocateCodeBlob( intSize, type); 357 } freeCodeBlob(long addr)358 public native void freeCodeBlob(long addr); forceNMethodSweep()359 public native void forceNMethodSweep(); getCodeHeapEntries(int type)360 public native Object[] getCodeHeapEntries(int type); getCompilationActivityMode()361 public native int getCompilationActivityMode(); getMethodData0(Executable method)362 private native long getMethodData0(Executable method); getMethodData(Executable method)363 public long getMethodData(Executable method) { 364 Objects.requireNonNull(method); 365 return getMethodData0(method); 366 } getCodeBlob(long addr)367 public native Object[] getCodeBlob(long addr); 368 clearInlineCaches0(boolean preserve_static_stubs)369 private native void clearInlineCaches0(boolean preserve_static_stubs); clearInlineCaches()370 public void clearInlineCaches() { 371 clearInlineCaches0(false); 372 } clearInlineCaches(boolean preserve_static_stubs)373 public void clearInlineCaches(boolean preserve_static_stubs) { 374 clearInlineCaches0(preserve_static_stubs); 375 } 376 377 // Intered strings isInStringTable(String str)378 public native boolean isInStringTable(String str); 379 380 // Memory readReservedMemory()381 public native void readReservedMemory(); allocateMetaspace(ClassLoader classLoader, long size)382 public native long allocateMetaspace(ClassLoader classLoader, long size); freeMetaspace(ClassLoader classLoader, long addr, long size)383 public native void freeMetaspace(ClassLoader classLoader, long addr, long size); incMetaspaceCapacityUntilGC(long increment)384 public native long incMetaspaceCapacityUntilGC(long increment); metaspaceCapacityUntilGC()385 public native long metaspaceCapacityUntilGC(); metaspaceShouldConcurrentCollect()386 public native boolean metaspaceShouldConcurrentCollect(); metaspaceReserveAlignment()387 public native long metaspaceReserveAlignment(); 388 389 // Don't use these methods directly 390 // Use sun.hotspot.gc.GC class instead. isGCSupported(int name)391 public native boolean isGCSupported(int name); isGCSelected(int name)392 public native boolean isGCSelected(int name); isGCSelectedErgonomically()393 public native boolean isGCSelectedErgonomically(); 394 395 // Force Young GC youngGC()396 public native void youngGC(); 397 398 // Force Full GC fullGC()399 public native void fullGC(); 400 401 // Returns true if the current GC supports control of its concurrent 402 // phase via requestConcurrentGCPhase(). If false, a request will 403 // always fail. supportsConcurrentGCPhaseControl()404 public native boolean supportsConcurrentGCPhaseControl(); 405 406 // Returns an array of concurrent phase names provided by this 407 // collector. These are the names recognized by 408 // requestConcurrentGCPhase(). getConcurrentGCPhases()409 public native String[] getConcurrentGCPhases(); 410 411 // Attempt to put the collector into the indicated concurrent phase, 412 // and attempt to remain in that state until a new request is made. 413 // 414 // Returns immediately if already in the requested phase. 415 // Otherwise, waits until the phase is reached. 416 // 417 // Throws IllegalStateException if unsupported by the current collector. 418 // Throws NullPointerException if phase is null. 419 // Throws IllegalArgumentException if phase is not valid for the current collector. requestConcurrentGCPhase(String phase)420 public void requestConcurrentGCPhase(String phase) { 421 if (!supportsConcurrentGCPhaseControl()) { 422 throw new IllegalStateException("Concurrent GC phase control not supported"); 423 } else if (phase == null) { 424 throw new NullPointerException("null phase"); 425 } else if (!requestConcurrentGCPhase0(phase)) { 426 throw new IllegalArgumentException("Unknown concurrent GC phase: " + phase); 427 } 428 } 429 430 // Helper for requestConcurrentGCPhase(). Returns true if request 431 // succeeded, false if the phase is invalid. requestConcurrentGCPhase0(String phase)432 private native boolean requestConcurrentGCPhase0(String phase); 433 434 // Method tries to start concurrent mark cycle. 435 // It returns false if CM Thread is always in concurrent cycle. g1StartConcMarkCycle()436 public native boolean g1StartConcMarkCycle(); 437 438 // Tests on ReservedSpace/VirtualSpace classes stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations)439 public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations); runMemoryUnitTests()440 public native void runMemoryUnitTests(); readFromNoaccessArea()441 public native void readFromNoaccessArea(); getThreadStackSize()442 public native long getThreadStackSize(); getThreadRemainingStackSize()443 public native long getThreadRemainingStackSize(); 444 445 // CPU features getCPUFeatures()446 public native String getCPUFeatures(); 447 448 // VM flags isConstantVMFlag(String name)449 public native boolean isConstantVMFlag(String name); isLockedVMFlag(String name)450 public native boolean isLockedVMFlag(String name); setBooleanVMFlag(String name, boolean value)451 public native void setBooleanVMFlag(String name, boolean value); setIntVMFlag(String name, long value)452 public native void setIntVMFlag(String name, long value); setUintVMFlag(String name, long value)453 public native void setUintVMFlag(String name, long value); setIntxVMFlag(String name, long value)454 public native void setIntxVMFlag(String name, long value); setUintxVMFlag(String name, long value)455 public native void setUintxVMFlag(String name, long value); setUint64VMFlag(String name, long value)456 public native void setUint64VMFlag(String name, long value); setSizeTVMFlag(String name, long value)457 public native void setSizeTVMFlag(String name, long value); setStringVMFlag(String name, String value)458 public native void setStringVMFlag(String name, String value); setDoubleVMFlag(String name, double value)459 public native void setDoubleVMFlag(String name, double value); getBooleanVMFlag(String name)460 public native Boolean getBooleanVMFlag(String name); getIntVMFlag(String name)461 public native Long getIntVMFlag(String name); getUintVMFlag(String name)462 public native Long getUintVMFlag(String name); getIntxVMFlag(String name)463 public native Long getIntxVMFlag(String name); getUintxVMFlag(String name)464 public native Long getUintxVMFlag(String name); getUint64VMFlag(String name)465 public native Long getUint64VMFlag(String name); getSizeTVMFlag(String name)466 public native Long getSizeTVMFlag(String name); getStringVMFlag(String name)467 public native String getStringVMFlag(String name); getDoubleVMFlag(String name)468 public native Double getDoubleVMFlag(String name); 469 private final List<Function<String,Object>> flagsGetters = Arrays.asList( 470 this::getBooleanVMFlag, this::getIntVMFlag, this::getUintVMFlag, 471 this::getIntxVMFlag, this::getUintxVMFlag, this::getUint64VMFlag, 472 this::getSizeTVMFlag, this::getStringVMFlag, this::getDoubleVMFlag); 473 getVMFlag(String name)474 public Object getVMFlag(String name) { 475 return flagsGetters.stream() 476 .map(f -> f.apply(name)) 477 .filter(x -> x != null) 478 .findAny() 479 .orElse(null); 480 } 481 482 // Jigsaw DefineModule(Object module, boolean is_open, String version, String location, Object[] packages)483 public native void DefineModule(Object module, boolean is_open, String version, 484 String location, Object[] packages); AddModuleExports(Object from_module, String pkg, Object to_module)485 public native void AddModuleExports(Object from_module, String pkg, Object to_module); AddReadsModule(Object from_module, Object source_module)486 public native void AddReadsModule(Object from_module, Object source_module); AddModuleExportsToAllUnnamed(Object module, String pkg)487 public native void AddModuleExportsToAllUnnamed(Object module, String pkg); AddModuleExportsToAll(Object module, String pkg)488 public native void AddModuleExportsToAll(Object module, String pkg); 489 getOffsetForName0(String name)490 public native int getOffsetForName0(String name); getOffsetForName(String name)491 public int getOffsetForName(String name) throws Exception { 492 int offset = getOffsetForName0(name); 493 if (offset == -1) { 494 throw new RuntimeException(name + " not found"); 495 } 496 return offset; 497 } getMethodBooleanOption(Executable method, String name)498 public native Boolean getMethodBooleanOption(Executable method, String name); getMethodIntxOption(Executable method, String name)499 public native Long getMethodIntxOption(Executable method, String name); getMethodUintxOption(Executable method, String name)500 public native Long getMethodUintxOption(Executable method, String name); getMethodDoubleOption(Executable method, String name)501 public native Double getMethodDoubleOption(Executable method, String name); getMethodStringOption(Executable method, String name)502 public native String getMethodStringOption(Executable method, String name); 503 private final List<BiFunction<Executable,String,Object>> methodOptionGetters 504 = Arrays.asList(this::getMethodBooleanOption, this::getMethodIntxOption, 505 this::getMethodUintxOption, this::getMethodDoubleOption, 506 this::getMethodStringOption); 507 getMethodOption(Executable method, String name)508 public Object getMethodOption(Executable method, String name) { 509 return methodOptionGetters.stream() 510 .map(f -> f.apply(method, name)) 511 .filter(x -> x != null) 512 .findAny() 513 .orElse(null); 514 } 515 516 // Safepoint Checking assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue)517 public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue); 518 519 // Sharing & archiving isShared(Object o)520 public native boolean isShared(Object o); isSharedClass(Class<?> c)521 public native boolean isSharedClass(Class<?> c); areSharedStringsIgnored()522 public native boolean areSharedStringsIgnored(); isCDSIncludedInVmBuild()523 public native boolean isCDSIncludedInVmBuild(); isJFRIncludedInVmBuild()524 public native boolean isJFRIncludedInVmBuild(); isJavaHeapArchiveSupported()525 public native boolean isJavaHeapArchiveSupported(); getResolvedReferences(Class<?> c)526 public native Object getResolvedReferences(Class<?> c); areOpenArchiveHeapObjectsMapped()527 public native boolean areOpenArchiveHeapObjectsMapped(); 528 529 // Compiler Directive addCompilerDirective(String compDirect)530 public native int addCompilerDirective(String compDirect); removeCompilerDirective(int count)531 public native void removeCompilerDirective(int count); 532 533 // Handshakes handshakeWalkStack(Thread t, boolean all_threads)534 public native int handshakeWalkStack(Thread t, boolean all_threads); 535 536 // Returns true on linux if library has the noexecstack flag set. checkLibSpecifiesNoexecstack(String libfilename)537 public native boolean checkLibSpecifiesNoexecstack(String libfilename); 538 539 // Container testing isContainerized()540 public native boolean isContainerized(); printOsInfo()541 public native void printOsInfo(); 542 543 // Decoder disableElfSectionCache()544 public native void disableElfSectionCache(); 545 546 // Number of loaded AOT libraries aotLibrariesCount()547 public native int aotLibrariesCount(); 548 } 549