Mercurial > hg > truffle
view test/testlibrary/whitebox/sun/hotspot/WhiteBox.java @ 14303:893ce66f7473
8027476: Improve performance of Stringtable unlink
8027455: Improve symbol table scan times during gc pauses
Summary: Parallelize string table and symbol table scan during remark and full GC. Some additional statistics output if the experimental flag G1TraceStringSymbolTableScrubbing is set.
Reviewed-by: mgerdin, coleenp, brutisso
author | tschatzl |
---|---|
date | Mon, 20 Jan 2014 11:47:07 +0100 |
parents | 9d8b29a0548c |
children | a48e16541e6b |
line wrap: on
line source
/* * Copyright (c) 2012, 2013, 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.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(); // 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); // 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 boolean NMTWaitForDataMerge(); public native boolean NMTIsDetailSupported(); // 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); // Intered strings public native boolean isInStringTable(String str); // Memory public native void readReservedMemory(); // 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(); }