/*
* Copyright (c) 2006, 2017, 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
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*/
package sun.jvm.hotspot.code;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.*;
public class VMRegImpl {
private static VMReg stack0;
private static int stack0Val;
private static Address stack0Addr;
private static AddressField regNameField;
private static int stackSlotSize;
static {
VM.registerVMInitializedObserver(new Observer() {
public void update(Observable o, Object data) {
initialize(VM.getVM().getTypeDataBase());
}
});
}
private static void initialize(TypeDataBase db) {
Type type = db.lookupType("VMRegImpl");
AddressField stack0Field = type.getAddressField("stack0");
stack0Addr = stack0Field.getValue();
stack0Val = (int) stack0Addr.hashCode();
stack0 = new VMReg(stack0Val);
regNameField = type.getAddressField("regName[0]");
stackSlotSize = db.lookupIntConstant("VMRegImpl::stack_slot_size");
}
public static VMReg getStack0() {
return stack0;
}
public static String getRegisterName(int index) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(index >= 0 && index < stack0Val, "invalid index : " + index);
}
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