/*
 * Copyright (c) 2012, 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 org.graalvm.compiler.lir.asm;

Code for managing a method's native frame.
/**
 * Code for managing a method's native frame.
 */
public interface FrameContext {

    
Emits code common to all entry points of a method. This may include:

setting up the stack frame
saving callee-saved registers
stack overflow checking

/**
     * Emits code common to all entry points of a method. This may include:
     * <ul>
     * <li>setting up the stack frame</li>
     * <li>saving callee-saved registers</li>
     * <li>stack overflow checking</li>
     * </ul>
     */
    void enter(CompilationResultBuilder crb);

    
Emits code to be executed just prior to returning from a method. This may include:

restoring callee-saved registers
performing a safepoint
destroying the stack frame

/**
     * Emits code to be executed just prior to returning from a method. This may include:
     * <ul>
     * <li>restoring callee-saved registers</li>
     * <li>performing a safepoint</li>
     * <li>destroying the stack frame</li>
     * </ul>
     */
    void leave(CompilationResultBuilder crb);

    
Determines if a frame is set up and torn down by this object.
/**
     * Determines if a frame is set up and torn down by this object.
     */
    boolean hasFrame();
}