| /* |
| * Copyright (c) 2012, 2012, 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 org.graalvm.compiler.word; |
| |
| import java.lang.reflect.Field; |
| |
| import sun.misc.Unsafe; |
| |
| /** |
| * Package private access to the {@link Unsafe} capability. |
| */ |
| class UnsafeAccess { |
| |
| static final Unsafe UNSAFE = initUnsafe(); |
| |
| private static Unsafe initUnsafe() { |
| try { |
| // Fast path when we are trusted. |
| return Unsafe.getUnsafe(); |
| } catch (SecurityException se) { |
| // Slow path when we are not trusted. |
| try { |
| Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe"); |
| theUnsafe.setAccessible(true); |
| return (Unsafe) theUnsafe.get(Unsafe.class); |
| } catch (Exception e) { |
| throw new RuntimeException("exception while trying to get Unsafe", e); |
| } |
| } |
| } |
| } |