Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/LocalVariableTableElement.java @ 6169:cfa2c82f4c04
7175133: jinfo failed to get system properties after 6924259
Summary: String offset and count fields as fix of 6924259 were removed, and become optional. SA still use offset and count fields to read String contents and failed. Fix if they exist, use them other then use value field only to read, this keeps consistent with the changes in 6924259.
Reviewed-by: dholmes, mikael
Contributed-by: yumin.qi@oracle.com
author | minqi |
---|---|
date | Fri, 22 Jun 2012 15:35:30 -0700 |
parents | c18cbe5936b8 |
children | da91efe96a93 |
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/* * Copyright (c) 2001, 2004, 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.oops; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.interpreter.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; public class LocalVariableTableElement { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { Type type = db.lookupType("LocalVariableTableElement"); offsetOfStartBCI = type.getCIntegerField("start_bci").getOffset(); offsetOfLength = type.getCIntegerField("length").getOffset(); offsetOfNameCPIndex = type.getCIntegerField("name_cp_index").getOffset(); offsetOfDescriptorCPIndex = type.getCIntegerField("descriptor_cp_index").getOffset(); offsetOfSignatureCPIndex = type.getCIntegerField("signature_cp_index").getOffset(); offsetOfSlot = type.getCIntegerField("slot").getOffset(); } private static long offsetOfStartBCI; private static long offsetOfLength; private static long offsetOfNameCPIndex; private static long offsetOfDescriptorCPIndex; private static long offsetOfSignatureCPIndex; private static long offsetOfSlot; private OopHandle handle; private long offset; public LocalVariableTableElement(OopHandle handle, long offset) { this.handle = handle; this.offset = offset; } public int getStartBCI() { return (int) handle.getCIntegerAt(offset + offsetOfStartBCI, 2, true); } public int getLength() { return (int) handle.getCIntegerAt(offset + offsetOfLength, 2, true); } public int getNameCPIndex() { return (int) handle.getCIntegerAt(offset + offsetOfNameCPIndex, 2, true); } public int getDescriptorCPIndex() { return (int) handle.getCIntegerAt(offset + offsetOfDescriptorCPIndex, 2, true); } public int getSignatureCPIndex() { return (int) handle.getCIntegerAt(offset + offsetOfSignatureCPIndex, 2, true); } public int getSlot() { return (int) handle.getCIntegerAt(offset + offsetOfSlot, 2, true); } }