Mercurial > hg > truffle
view test/testlibrary/whitebox/sun/hotspot/WhiteBox.java @ 21204:4a5df5570b7f
Truffle: make ReplaceObserver return a boolean in order to consume replace events. It can be useful for nodes to consume all replace events if they are always executed behind a @TruffleBoundary.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 04 May 2015 11:24:13 +0200 |
parents | 887a7cedb892 |
children |
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/* * 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 java.net.URL; 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 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); // Resource/Class Lookup Cache public native boolean classKnownToNotExist(ClassLoader loader, String name); public native URL[] getLookupCacheURLs(ClassLoader loader); public native int[] getLookupCacheMatches(ClassLoader loader, 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, 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 int getMethodEntryBci(Executable method); public native Object[] getNMethod(Executable method, boolean isOsr); // 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(); // 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 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 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 String getStringVMFlag(String name); public native Double getDoubleVMFlag(String name); private final List<Function<String,Object>> flagsGetters = Arrays.asList( this::getBooleanVMFlag, this::getIntxVMFlag, this::getUintxVMFlag, this::getUint64VMFlag, 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; } }