Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/livejvm/JNIHandleAccessor.java @ 7353:b5280041f59e
Experiment with soft alignment for branch targets.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 13 Jan 2013 19:32:16 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2002, 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.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()); } }