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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * 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.
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package jdk.vm.ci.code.stack;

import jdk.vm.ci.meta.ResolvedJavaMethod;

Access to the object variables in a stack frame.
/**
 * Access to the object variables in a stack frame.
 */
public interface InspectedFrame {

    
Returns the value of the object local at index. This value is a copy iff isVirtual(int) is true. /**
     * Returns the value of the object local at {@code index}. This value is a copy iff
     * {@link #isVirtual(int)} is true.
     */
    Object getLocal(int index);

    
Returns whether the local at index is a virtual object, and therefore the object returned by getLocal(int) is a copy. /**
     * Returns whether the local at {@code index} is a virtual object, and therefore the object
     * returned by {@link #getLocal(int)} is a copy.
     */
    boolean isVirtual(int index);

    
Returns true if the stack frame is a compiled stack frame and there are virtual objects anywhere in the current state of the compiled method. This can return true even if isVirtual(int) return false for all locals. /**
     * Returns true if the stack frame is a compiled stack frame and there are virtual objects
     * anywhere in the current state of the compiled method. This can return true even if
     * {@link #isVirtual(int)} return false for all locals.
     */
    boolean hasVirtualObjects();

    
This method will materialize all virtual objects, deoptimize the stack frame and make sure
that subsequent execution of the deoptimized frame uses the materialized values.
/**
     * This method will materialize all virtual objects, deoptimize the stack frame and make sure
     * that subsequent execution of the deoptimized frame uses the materialized values.
     */
    void materializeVirtualObjects(boolean invalidateCode);

    
Returns:
the current bytecode index/**
     * @return the current bytecode index
     */
    int getBytecodeIndex();

    
Returns:
the current method/**
     * @return the current method
     */
    ResolvedJavaMethod getMethod();

    
Checks if the current method is equal to the given method. This is semantically equivalent to method.equals(getMethod()), but can be implemented more efficiently. /**
     * Checks if the current method is equal to the given method. This is semantically equivalent to
     * {@code method.equals(getMethod())}, but can be implemented more efficiently.
     */
    boolean isMethod(ResolvedJavaMethod method);
}