1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package jdk.vm.ci.hotspot;
  24 
  25 import jdk.vm.ci.code.stack.InspectedFrameVisitor;
  26 import jdk.vm.ci.code.stack.StackIntrospection;
  27 import jdk.vm.ci.meta.ResolvedJavaMethod;
  28 
  29 public class HotSpotStackIntrospection implements StackIntrospection {
  30 
  31     protected final HotSpotJVMCIRuntimeProvider runtime;
  32 
  33     public HotSpotStackIntrospection(HotSpotJVMCIRuntimeProvider runtime) {
  34         this.runtime = runtime;
  35     }
  36 
  37     @Override
  38     public <T> T iterateFrames(ResolvedJavaMethod[] initialMethods, ResolvedJavaMethod[] matchingMethods, int initialSkip, InspectedFrameVisitor<T> visitor) {
  39         CompilerToVM compilerToVM = runtime.getCompilerToVM();
  40         HotSpotStackFrameReference current = compilerToVM.getNextStackFrame(null, initialMethods, initialSkip);
  41         while (current != null) {
  42             T result = visitor.visitFrame(current);
  43             if (result != null) {
  44                 return result;
  45             }
  46             current = compilerToVM.getNextStackFrame(current, matchingMethods, 0);
  47         }
  48         return null;
  49     }
  50 }