| /* |
| * 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.Method; |
| 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(); |
| } |
| |
| // 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 boolean NMTAllocTest(); |
| public native boolean NMTFreeTestMemory(); |
| public native boolean NMTWaitForDataMerge(); |
| |
| // Compiler |
| public native void deoptimizeAll(); |
| public native boolean isMethodCompiled(Method method); |
| public native boolean isMethodCompilable(Method method); |
| public native boolean isMethodQueuedForCompilation(Method method); |
| public native int deoptimizeMethod(Method method); |
| public native void makeMethodNotCompilable(Method method); |
| public native int getMethodCompilationLevel(Method method); |
| public native boolean setDontInlineMethod(Method method, boolean value); |
| public native int getCompileQueuesSize(); |
| } |