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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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).
 *
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 * 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;

public interface StackIntrospection {

    
Walks the current stack, providing InspectedFrames to the visitor that can be used to inspect the stack frame's contents. Iteration continues as long as InspectedFrameVisitor.visitFrame, which is invoked for every InspectedFrame, returns null. A non-null return value from InspectedFrameVisitor.visitFrame indicates that frame iteration should stop. 
Params:
  • initialMethods – if this is non-null, then the stack walk will start at the first frame whose method is one of these methods.
  • matchingMethods – if this is non-null, then only frames whose methods are in this array are visited
  • initialSkip – the number of matching methods to skip (including the initial method)
  • visitor – the visitor that is called for every matching method
Returns:the last result returned by the visitor (which is non-null to indicate that iteration
        should stop), or null if the whole stack was iterated.
/**
     * Walks the current stack, providing {@link InspectedFrame}s to the visitor that can be used to
     * inspect the stack frame's contents. Iteration continues as long as
     * {@link InspectedFrameVisitor#visitFrame}, which is invoked for every {@link InspectedFrame},
     * returns {@code null}. A non-null return value from {@link InspectedFrameVisitor#visitFrame}
     * indicates that frame iteration should stop.
     *
     * @param initialMethods if this is non-{@code null}, then the stack walk will start at the
     *            first frame whose method is one of these methods.
     * @param matchingMethods if this is non-{@code null}, then only frames whose methods are in
     *            this array are visited
     * @param initialSkip the number of matching methods to skip (including the initial method)
     * @param visitor the visitor that is called for every matching method
     * @return the last result returned by the visitor (which is non-null to indicate that iteration
     *         should stop), or null if the whole stack was iterated.
     */
    <T> T iterateFrames(ResolvedJavaMethod[] initialMethods, ResolvedJavaMethod[] matchingMethods, int initialSkip, InspectedFrameVisitor<T> visitor);
}