| /* |
| * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.hotspot; |
| |
| import java.lang.management.MemoryUsage; |
| import java.lang.reflect.Executable; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.function.BiFunction; |
| import java.util.function.Function; |
| import java.security.BasicPermission; |
| import java.util.Objects; |
| |
| import sun.hotspot.parser.DiagnosticCommand; |
| |
| public class WhiteBox { |
| @SuppressWarnings("serial") |
| public static class WhiteBoxPermission extends BasicPermission { |
| public WhiteBoxPermission(String s) { |
| super(s); |
| } |
| } |
| |
| private WhiteBox() {} |
| private static final WhiteBox instance = new WhiteBox(); |
| private static native void registerNatives(); |
| |
| /** |
| * Returns the singleton WhiteBox instance. |
| * |
| * The returned WhiteBox object should be carefully guarded |
| * by the caller, since it can be used to read and write data |
| * at arbitrary memory addresses. It must never be passed to |
| * untrusted code. |
| */ |
| public synchronized static WhiteBox getWhiteBox() { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| sm.checkPermission(new WhiteBoxPermission("getInstance")); |
| } |
| return instance; |
| } |
| |
| static { |
| registerNatives(); |
| } |
| |
| // Get the maximum heap size supporting COOPs |
| public native long getCompressedOopsMaxHeapSize(); |
| // Arguments |
| public native void printHeapSizes(); |
| |
| // Memory |
| private native long getObjectAddress0(Object o); |
| public long getObjectAddress(Object o) { |
| Objects.requireNonNull(o); |
| return getObjectAddress0(o); |
| } |
| |
| public native int getHeapOopSize(); |
| public native int getVMPageSize(); |
| public native long getVMAllocationGranularity(); |
| public native long getVMLargePageSize(); |
| public native long getHeapSpaceAlignment(); |
| public native long getHeapAlignment(); |
| |
| private native boolean isObjectInOldGen0(Object o); |
| public boolean isObjectInOldGen(Object o) { |
| Objects.requireNonNull(o); |
| return isObjectInOldGen0(o); |
| } |
| |
| private native long getObjectSize0(Object o); |
| public long getObjectSize(Object o) { |
| Objects.requireNonNull(o); |
| return getObjectSize0(o); |
| } |
| |
| // Runtime |
| // Make sure class name is in the correct format |
| public boolean isClassAlive(String name) { |
| return isClassAlive0(name.replace('.', '/')); |
| } |
| private native boolean isClassAlive0(String name); |
| |
| private native boolean isMonitorInflated0(Object obj); |
| public boolean isMonitorInflated(Object obj) { |
| Objects.requireNonNull(obj); |
| return isMonitorInflated0(obj); |
| } |
| |
| public native void forceSafepoint(); |
| |
| private native long getConstantPool0(Class<?> aClass); |
| public long getConstantPool(Class<?> aClass) { |
| Objects.requireNonNull(aClass); |
| return getConstantPool0(aClass); |
| } |
| |
| private native int getConstantPoolCacheIndexTag0(); |
| public int getConstantPoolCacheIndexTag() { |
| return getConstantPoolCacheIndexTag0(); |
| } |
| |
| private native int getConstantPoolCacheLength0(Class<?> aClass); |
| public int getConstantPoolCacheLength(Class<?> aClass) { |
| Objects.requireNonNull(aClass); |
| return getConstantPoolCacheLength0(aClass); |
| } |
| |
| private native int remapInstructionOperandFromCPCache0(Class<?> aClass, int index); |
| public int remapInstructionOperandFromCPCache(Class<?> aClass, int index) { |
| Objects.requireNonNull(aClass); |
| return remapInstructionOperandFromCPCache0(aClass, index); |
| } |
| |
| private native int encodeConstantPoolIndyIndex0(int index); |
| public int encodeConstantPoolIndyIndex(int index) { |
| return encodeConstantPoolIndyIndex0(index); |
| } |
| |
| // JVMTI |
| private native void addToBootstrapClassLoaderSearch0(String segment); |
| public void addToBootstrapClassLoaderSearch(String segment){ |
| Objects.requireNonNull(segment); |
| addToBootstrapClassLoaderSearch0(segment); |
| } |
| |
| private native void addToSystemClassLoaderSearch0(String segment); |
| public void addToSystemClassLoaderSearch(String segment) { |
| Objects.requireNonNull(segment); |
| addToSystemClassLoaderSearch0(segment); |
| } |
| |
| // G1 |
| public native boolean g1InConcurrentMark(); |
| private native boolean g1IsHumongous0(Object o); |
| public boolean g1IsHumongous(Object o) { |
| Objects.requireNonNull(o); |
| return g1IsHumongous0(o); |
| } |
| |
| private native boolean g1BelongsToHumongousRegion0(long adr); |
| public boolean g1BelongsToHumongousRegion(long adr) { |
| if (adr == 0) { |
| throw new IllegalArgumentException("adr argument should not be null"); |
| } |
| return g1BelongsToHumongousRegion0(adr); |
| } |
| |
| |
| private native boolean g1BelongsToFreeRegion0(long adr); |
| public boolean g1BelongsToFreeRegion(long adr) { |
| if (adr == 0) { |
| throw new IllegalArgumentException("adr argument should not be null"); |
| } |
| return g1BelongsToFreeRegion0(adr); |
| } |
| |
| public native long g1NumMaxRegions(); |
| public native long g1NumFreeRegions(); |
| public native int g1RegionSize(); |
| public native MemoryUsage g1AuxiliaryMemoryUsage(); |
| private native Object[] parseCommandLine0(String commandline, char delim, DiagnosticCommand[] args); |
| public Object[] parseCommandLine(String commandline, char delim, DiagnosticCommand[] args) { |
| Objects.requireNonNull(args); |
| return parseCommandLine0(commandline, delim, args); |
| } |
| |
| // Parallel GC |
| public native long psVirtualSpaceAlignment(); |
| public native long psHeapGenerationAlignment(); |
| |
| /** |
| * Enumerates old regions with liveness less than specified and produces some statistics |
| * @param liveness percent of region's liveness (live_objects / total_region_size * 100). |
| * @return long[3] array where long[0] - total count of old regions |
| * long[1] - total memory of old regions |
| * long[2] - lowest estimation of total memory of old regions to be freed (non-full |
| * regions are not included) |
| */ |
| public native long[] g1GetMixedGCInfo(int liveness); |
| |
| // NMT |
| public native long NMTMalloc(long size); |
| public native void NMTFree(long mem); |
| public native long NMTReserveMemory(long size); |
| public native void NMTCommitMemory(long addr, long size); |
| public native void NMTUncommitMemory(long addr, long size); |
| public native void NMTReleaseMemory(long addr, long size); |
| public native long NMTMallocWithPseudoStack(long size, int index); |
| public native boolean NMTChangeTrackingLevel(); |
| public native int NMTGetHashSize(); |
| |
| // Compiler |
| public native int matchesMethod(Executable method, String pattern); |
| public native int matchesInline(Executable method, String pattern); |
| public native boolean shouldPrintAssembly(Executable method, int comp_level); |
| public native int deoptimizeFrames(boolean makeNotEntrant); |
| public native void deoptimizeAll(); |
| |
| public boolean isMethodCompiled(Executable method) { |
| return isMethodCompiled(method, false /*not osr*/); |
| } |
| private native boolean isMethodCompiled0(Executable method, boolean isOsr); |
| public boolean isMethodCompiled(Executable method, boolean isOsr){ |
| Objects.requireNonNull(method); |
| return isMethodCompiled0(method, isOsr); |
| } |
| public boolean isMethodCompilable(Executable method) { |
| return isMethodCompilable(method, -2 /*any*/); |
| } |
| public boolean isMethodCompilable(Executable method, int compLevel) { |
| return isMethodCompilable(method, compLevel, false /*not osr*/); |
| } |
| private native boolean isMethodCompilable0(Executable method, int compLevel, boolean isOsr); |
| public boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr) { |
| Objects.requireNonNull(method); |
| return isMethodCompilable0(method, compLevel, isOsr); |
| } |
| private native boolean isMethodQueuedForCompilation0(Executable method); |
| public boolean isMethodQueuedForCompilation(Executable method) { |
| Objects.requireNonNull(method); |
| return isMethodQueuedForCompilation0(method); |
| } |
| // Determine if the compiler corresponding to the compilation level 'compLevel' |
| // and to the compilation context 'compilation_context' provides an intrinsic |
| // for the method 'method'. An intrinsic is available for method 'method' if: |
| // - the intrinsic is enabled (by using the appropriate command-line flag) and |
| // - the platform on which the VM is running provides the instructions necessary |
| // for the compiler to generate the intrinsic code. |
| // |
| // The compilation context is related to using the DisableIntrinsic flag on a |
| // per-method level, see hotspot/src/share/vm/compiler/abstractCompiler.hpp |
| // for more details. |
| public boolean isIntrinsicAvailable(Executable method, |
| Executable compilationContext, |
| int compLevel) { |
| Objects.requireNonNull(method); |
| return isIntrinsicAvailable0(method, compilationContext, compLevel); |
| } |
| // If usage of the DisableIntrinsic flag is not expected (or the usage can be ignored), |
| // use the below method that does not require the compilation context as argument. |
| public boolean isIntrinsicAvailable(Executable method, int compLevel) { |
| return isIntrinsicAvailable(method, null, compLevel); |
| } |
| private native boolean isIntrinsicAvailable0(Executable method, |
| Executable compilationContext, |
| int compLevel); |
| public int deoptimizeMethod(Executable method) { |
| return deoptimizeMethod(method, false /*not osr*/); |
| } |
| private native int deoptimizeMethod0(Executable method, boolean isOsr); |
| public int deoptimizeMethod(Executable method, boolean isOsr) { |
| Objects.requireNonNull(method); |
| return deoptimizeMethod0(method, isOsr); |
| } |
| public void makeMethodNotCompilable(Executable method) { |
| makeMethodNotCompilable(method, -2 /*any*/); |
| } |
| public void makeMethodNotCompilable(Executable method, int compLevel) { |
| makeMethodNotCompilable(method, compLevel, false /*not osr*/); |
| } |
| private native void makeMethodNotCompilable0(Executable method, int compLevel, boolean isOsr); |
| public void makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr) { |
| Objects.requireNonNull(method); |
| makeMethodNotCompilable0(method, compLevel, isOsr); |
| } |
| public int getMethodCompilationLevel(Executable method) { |
| return getMethodCompilationLevel(method, false /*not ost*/); |
| } |
| private native int getMethodCompilationLevel0(Executable method, boolean isOsr); |
| public int getMethodCompilationLevel(Executable method, boolean isOsr) { |
| Objects.requireNonNull(method); |
| return getMethodCompilationLevel0(method, isOsr); |
| } |
| private native boolean testSetDontInlineMethod0(Executable method, boolean value); |
| public boolean testSetDontInlineMethod(Executable method, boolean value) { |
| Objects.requireNonNull(method); |
| return testSetDontInlineMethod0(method, value); |
| } |
| public int getCompileQueuesSize() { |
| return getCompileQueueSize(-2 /*any*/); |
| } |
| public native int getCompileQueueSize(int compLevel); |
| private native boolean testSetForceInlineMethod0(Executable method, boolean value); |
| public boolean testSetForceInlineMethod(Executable method, boolean value) { |
| Objects.requireNonNull(method); |
| return testSetForceInlineMethod0(method, value); |
| } |
| public boolean enqueueMethodForCompilation(Executable method, int compLevel) { |
| return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/); |
| } |
| private native boolean enqueueMethodForCompilation0(Executable method, int compLevel, int entry_bci); |
| public boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci) { |
| Objects.requireNonNull(method); |
| return enqueueMethodForCompilation0(method, compLevel, entry_bci); |
| } |
| private native boolean enqueueInitializerForCompilation0(Class<?> aClass, int compLevel); |
| public boolean enqueueInitializerForCompilation(Class<?> aClass, int compLevel) { |
| Objects.requireNonNull(aClass); |
| return enqueueInitializerForCompilation0(aClass, compLevel); |
| } |
| private native void clearMethodState0(Executable method); |
| public void clearMethodState(Executable method) { |
| Objects.requireNonNull(method); |
| clearMethodState0(method); |
| } |
| public native void lockCompilation(); |
| public native void unlockCompilation(); |
| private native int getMethodEntryBci0(Executable method); |
| public int getMethodEntryBci(Executable method) { |
| Objects.requireNonNull(method); |
| return getMethodEntryBci0(method); |
| } |
| private native Object[] getNMethod0(Executable method, boolean isOsr); |
| public Object[] getNMethod(Executable method, boolean isOsr) { |
| Objects.requireNonNull(method); |
| return getNMethod0(method, isOsr); |
| } |
| public native long allocateCodeBlob(int size, int type); |
| public long allocateCodeBlob(long size, int type) { |
| int intSize = (int) size; |
| if ((long) intSize != size || size < 0) { |
| throw new IllegalArgumentException( |
| "size argument has illegal value " + size); |
| } |
| return allocateCodeBlob( intSize, type); |
| } |
| public native void freeCodeBlob(long addr); |
| public native void forceNMethodSweep(); |
| public native Object[] getCodeHeapEntries(int type); |
| public native int getCompilationActivityMode(); |
| private native long getMethodData0(Executable method); |
| public long getMethodData(Executable method) { |
| Objects.requireNonNull(method); |
| return getMethodData0(method); |
| } |
| public native Object[] getCodeBlob(long addr); |
| |
| private native void clearInlineCaches0(boolean preserve_static_stubs); |
| public void clearInlineCaches() { |
| clearInlineCaches0(false); |
| } |
| public void clearInlineCaches(boolean preserve_static_stubs) { |
| clearInlineCaches0(preserve_static_stubs); |
| } |
| |
| // Intered strings |
| public native boolean isInStringTable(String str); |
| |
| // Memory |
| public native void readReservedMemory(); |
| public native long allocateMetaspace(ClassLoader classLoader, long size); |
| public native void freeMetaspace(ClassLoader classLoader, long addr, long size); |
| public native long incMetaspaceCapacityUntilGC(long increment); |
| public native long metaspaceCapacityUntilGC(); |
| public native boolean metaspaceShouldConcurrentCollect(); |
| |
| // Don't use these methods directly |
| // Use sun.hotspot.gc.GC class instead. |
| public native int currentGC(); |
| public native int allSupportedGC(); |
| public native boolean gcSelectedByErgo(); |
| |
| // Force Young GC |
| public native void youngGC(); |
| |
| // Force Full GC |
| public native void fullGC(); |
| |
| // Method tries to start concurrent mark cycle. |
| // It returns false if CM Thread is always in concurrent cycle. |
| public native boolean g1StartConcMarkCycle(); |
| |
| // Tests on ReservedSpace/VirtualSpace classes |
| public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations); |
| public native void runMemoryUnitTests(); |
| public native void readFromNoaccessArea(); |
| public native long getThreadStackSize(); |
| public native long getThreadRemainingStackSize(); |
| |
| // CPU features |
| public native String getCPUFeatures(); |
| |
| // Native extensions |
| public native long getHeapUsageForContext(int context); |
| public native long getHeapRegionCountForContext(int context); |
| private native int getContextForObject0(Object obj); |
| public int getContextForObject(Object obj) { |
| Objects.requireNonNull(obj); |
| return getContextForObject0(obj); |
| } |
| public native void printRegionInfo(int context); |
| |
| // VM flags |
| public native boolean isConstantVMFlag(String name); |
| public native boolean isLockedVMFlag(String name); |
| public native void setBooleanVMFlag(String name, boolean value); |
| public native void setIntVMFlag(String name, long value); |
| public native void setUintVMFlag(String name, long value); |
| public native void setIntxVMFlag(String name, long value); |
| public native void setUintxVMFlag(String name, long value); |
| public native void setUint64VMFlag(String name, long value); |
| public native void setSizeTVMFlag(String name, long value); |
| public native void setStringVMFlag(String name, String value); |
| public native void setDoubleVMFlag(String name, double value); |
| public native Boolean getBooleanVMFlag(String name); |
| public native Long getIntVMFlag(String name); |
| public native Long getUintVMFlag(String name); |
| public native Long getIntxVMFlag(String name); |
| public native Long getUintxVMFlag(String name); |
| public native Long getUint64VMFlag(String name); |
| public native Long getSizeTVMFlag(String name); |
| public native String getStringVMFlag(String name); |
| public native Double getDoubleVMFlag(String name); |
| private final List<Function<String,Object>> flagsGetters = Arrays.asList( |
| this::getBooleanVMFlag, this::getIntVMFlag, this::getUintVMFlag, |
| this::getIntxVMFlag, this::getUintxVMFlag, this::getUint64VMFlag, |
| this::getSizeTVMFlag, this::getStringVMFlag, this::getDoubleVMFlag); |
| |
| public Object getVMFlag(String name) { |
| return flagsGetters.stream() |
| .map(f -> f.apply(name)) |
| .filter(x -> x != null) |
| .findAny() |
| .orElse(null); |
| } |
| |
| // Jigsaw |
| public native void DefineModule(Object module, String version, String location, |
| Object[] packages); |
| public native void AddModuleExports(Object from_module, String pkg, Object to_module); |
| public native void AddReadsModule(Object from_module, Object source_module); |
| public native void AddModulePackage(Object module, String pkg); |
| public native void AddModuleExportsToAllUnnamed(Object module, String pkg); |
| public native void AddModuleExportsToAll(Object module, String pkg); |
| public native Object GetModuleByPackageName(Object ldr, String pkg); |
| |
| public native int getOffsetForName0(String name); |
| public int getOffsetForName(String name) throws Exception { |
| int offset = getOffsetForName0(name); |
| if (offset == -1) { |
| throw new RuntimeException(name + " not found"); |
| } |
| return offset; |
| } |
| public native Boolean getMethodBooleanOption(Executable method, String name); |
| public native Long getMethodIntxOption(Executable method, String name); |
| public native Long getMethodUintxOption(Executable method, String name); |
| public native Double getMethodDoubleOption(Executable method, String name); |
| public native String getMethodStringOption(Executable method, String name); |
| private final List<BiFunction<Executable,String,Object>> methodOptionGetters |
| = Arrays.asList(this::getMethodBooleanOption, this::getMethodIntxOption, |
| this::getMethodUintxOption, this::getMethodDoubleOption, |
| this::getMethodStringOption); |
| |
| public Object getMethodOption(Executable method, String name) { |
| return methodOptionGetters.stream() |
| .map(f -> f.apply(method, name)) |
| .filter(x -> x != null) |
| .findAny() |
| .orElse(null); |
| } |
| |
| // Safepoint Checking |
| public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue); |
| |
| // Sharing |
| public native boolean isShared(Object o); |
| public native boolean isSharedClass(Class<?> c); |
| public native boolean areSharedStringsIgnored(); |
| |
| // Compiler Directive |
| public native int addCompilerDirective(String compDirect); |
| public native void removeCompilerDirective(int count); |
| } |
