| /* |
| * Copyright 2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.livejvm; |
| |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| class JNIHandleAccessor { |
| private Address addr; |
| private ObjectHeap heap; |
| |
| JNIHandleAccessor(Address addr, ObjectHeap heap) { |
| this.addr = addr; |
| this.heap = heap; |
| } |
| |
| Oop getValue() { |
| // Accessing the contents of the JNIHandle is a double dereference |
| Address handle = addr.getAddressAt(0); |
| if (handle == null) return null; |
| return heap.newOop(handle.getOopHandleAt(0)); |
| } |
| |
| void setValue(Oop value) { |
| Address handle = addr.getAddressAt(0); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(handle != null, "Must have valid global JNI handle for setting"); |
| } |
| handle.setOopHandleAt(0, value.getHandle()); |
| } |
| } |