--- /dev/null 2014-12-10 09:43:56.990156975 +0100 +++ new/test/lib/sun/hotspot/WhiteBox.java 2014-12-10 10:16:59.692026054 +0100 @@ -0,0 +1,251 @@ +/* + * Copyright (c) 2012, 2014, 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.reflect.Executable; +import java.util.Arrays; +import java.util.List; +import java.util.function.Function; +import java.util.stream.Stream; +import java.security.BasicPermission; + +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 + public native long getObjectAddress(Object o); + public native int getHeapOopSize(); + public native int getVMPageSize(); + public native boolean isObjectInOldGen(Object o); + public native long getObjectSize(Object 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); + + // JVMTI + public native void addToBootstrapClassLoaderSearch(String segment); + public native void addToSystemClassLoaderSearch(String segment); + + // G1 + public native boolean g1InConcurrentMark(); + public native boolean g1IsHumongous(Object o); + public native long g1NumFreeRegions(); + public native int g1RegionSize(); + public native Object[] parseCommandLine(String commandline, char delim, DiagnosticCommand[] args); + + // 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 NMTIsDetailSupported(); + public native boolean NMTChangeTrackingLevel(); + public native int NMTGetHashSize(); + + // Compiler + public native void deoptimizeAll(); + public boolean isMethodCompiled(Executable method) { + return isMethodCompiled(method, false /*not osr*/); + } + public native boolean isMethodCompiled(Executable method, boolean isOsr); + public boolean isMethodCompilable(Executable method) { + return isMethodCompilable(method, -1 /*any*/); + } + public boolean isMethodCompilable(Executable method, int compLevel) { + return isMethodCompilable(method, compLevel, false /*not osr*/); + } + public native boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr); + public native boolean isMethodQueuedForCompilation(Executable method); + public int deoptimizeMethod(Executable method) { + return deoptimizeMethod(method, false /*not osr*/); + } + public native int deoptimizeMethod(Executable method, boolean isOsr); + public void makeMethodNotCompilable(Executable method) { + makeMethodNotCompilable(method, -1 /*any*/); + } + public void makeMethodNotCompilable(Executable method, int compLevel) { + makeMethodNotCompilable(method, compLevel, false /*not osr*/); + } + public native void makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr); + public int getMethodCompilationLevel(Executable method) { + return getMethodCompilationLevel(method, false /*not ost*/); + } + public native int getMethodCompilationLevel(Executable method, boolean isOsr); + public native boolean testSetDontInlineMethod(Executable method, boolean value); + public int getCompileQueuesSize() { + return getCompileQueueSize(-1 /*any*/); + } + public native int getCompileQueueSize(int compLevel); + public native boolean testSetForceInlineMethod(Executable method, boolean value); + public boolean enqueueMethodForCompilation(Executable method, int compLevel) { + return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/); + } + public native boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci); + public native void clearMethodState(Executable method); + public native void lockCompilation(); + public native void unlockCompilation(); + public native int getMethodEntryBci(Executable method); + public native Object[] getNMethod(Executable method, boolean 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 void forceNMethodSweep() { + try { + forceNMethodSweep0().join(); + } catch (InterruptedException e) { + Thread.currentThread().interrupt(); + } + } + public native Thread forceNMethodSweep0(); + public native Object[] getCodeHeapEntries(int type); + public native int getCompilationActivityMode(); + public native Object[] getCodeBlob(long addr); + + // 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(); + + // 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); + public native int getContextForObject(Object 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 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 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> flagsGetters = Arrays.asList( + this::getBooleanVMFlag, 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); + } + 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; + } + +}