/*
* Copyright (c) 2007, 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
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* questions.
*/
package com.sun.max.vm.stack;
import com.sun.max.annotate.*;
import com.sun.max.unsafe.*;
import com.sun.max.vm.compiler.target.*;
/**
* An adapter enables calls across code compiled by different compilers with different calling convention. The adapter
* takes care of setting up a caller activation frame as expected by the callee. A {@code AdapterStackFrame} object
* abstracts the activation frame of such adapters.
*/
@HOSTED_ONLY
public class AdapterStackFrame extends VMStackFrame {
public AdapterStackFrame(StackFrame callee, TargetMethod targetMethod, Pointer instructionPointer, Pointer framePointer, Pointer stackPointer) {
super(callee, targetMethod, instructionPointer, framePointer, stackPointer);
}
/**
* Two adapter frames are the same iff they are of the same concrete type and their stack and frame pointers are identical.
*/
@Override
public boolean isSameFrame(StackFrame stackFrame) {
if (stackFrame.getClass().equals(getClass())) {
return stackFrame.sp.equals(sp) && stackFrame.fp.equals(fp);
}
return false;
}
}