Mercurial > hg > graal-jvmci-8
diff agent/src/share/classes/sun/jvm/hotspot/runtime/vmSymbols.java @ 3962:cb315dc80374
7092278: "jmap -finalizerinfo" throws "sun.jvm.hotspot.utilities.AssertionFailure: invalid cp index 0 137"
Reviewed-by: kvn
author | never |
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date | Thu, 29 Sep 2011 09:53:56 -0700 |
parents | |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/vmSymbols.java Thu Sep 29 09:53:56 2011 -0700 @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2011, 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.runtime; + +import java.io.*; +import java.util.*; +import sun.jvm.hotspot.debugger.*; +import sun.jvm.hotspot.memory.*; +import sun.jvm.hotspot.oops.*; +import sun.jvm.hotspot.runtime.*; +import sun.jvm.hotspot.types.*; +import sun.jvm.hotspot.utilities.*; + + +public class vmSymbols { + static { + VM.registerVMInitializedObserver(new Observer() { + public void update(Observable o, Object data) { + initialize(VM.getVM().getTypeDataBase()); + } + }); + } + + private static Address symbolsAddress; + private static int FIRST_SID; + private static int SID_LIMIT; + + private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { + Type type = db.lookupType("vmSymbols"); + symbolsAddress = type.getAddressField("_symbols[0]").getStaticFieldAddress(); + FIRST_SID = db.lookupIntConstant("vmSymbols::FIRST_SID"); + SID_LIMIT = db.lookupIntConstant("vmSymbols::SID_LIMIT"); + } + + public static Symbol symbolAt(int id) { + if (id < FIRST_SID || id >= SID_LIMIT) throw new IndexOutOfBoundsException("bad SID " + id); + return Symbol.create(symbolsAddress.getAddressAt(id * VM.getVM().getAddressSize())); + } +}