1 /*
   2  * Copyright (c) 2014, 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 java.util.Arrays;
  26 
  27 import jdk.vm.ci.code.stack.InspectedFrame;
  28 import jdk.vm.ci.meta.ResolvedJavaMethod;
  29 
  30 public class HotSpotStackFrameReference implements InspectedFrame {
  31 
  32     private CompilerToVM compilerToVM;
  33 
  34     // information used to find the stack frame
  35     private long stackPointer;
  36     private int frameNumber;
  37 
  38     // information about the stack frame's contents
  39     private int bci;
  40     private HotSpotResolvedJavaMethod method;
  41     private Object[] locals;
  42     private boolean[] localIsVirtual;
  43 
  44     public long getStackPointer() {
  45         return stackPointer;
  46     }
  47 
  48     public int getFrameNumber() {
  49         return frameNumber;
  50     }
  51 
  52     @Override
  53     public Object getLocal(int index) {
  54         return locals[index];
  55     }
  56 
  57     @Override
  58     public boolean isVirtual(int index) {
  59         return localIsVirtual == null ? false : localIsVirtual[index];
  60     }
  61 
  62     @Override
  63     public void materializeVirtualObjects(boolean invalidateCode) {
  64         compilerToVM.materializeVirtualObjects(this, invalidateCode);
  65     }
  66 
  67     @Override
  68     public int getBytecodeIndex() {
  69         return bci;
  70     }
  71 
  72     @Override
  73     public ResolvedJavaMethod getMethod() {
  74         return method;
  75     }
  76 
  77     @Override
  78     public boolean isMethod(ResolvedJavaMethod otherMethod) {
  79         return method.equals(otherMethod);
  80     }
  81 
  82     @Override
  83     public boolean hasVirtualObjects() {
  84         return localIsVirtual != null;
  85     }
  86 
  87     @Override
  88     public String toString() {
  89         return "HotSpotStackFrameReference [stackPointer=" + stackPointer + ", frameNumber=" + frameNumber + ", bci=" + bci + ", method=" + getMethod() + ", locals=" + Arrays.toString(locals) +
  90                         ", localIsVirtual=" + Arrays.toString(localIsVirtual) + "]";
  91     }
  92 }