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annotate graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/DebugInfo.java @ 5552:69a8969dbf40

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Reduce public fields in api.code project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 09 Jun 2012 21:50:02 +0200
parents b6617d13ea44
children 4d7175cf3526
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1 /*
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.api.code;
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24
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25 import java.io.*;
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26 import java.util.*;
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27
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28 /**
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29 * Represents the debugging information for a particular place in the code,
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30 * which includes the code position, a reference map, and deoptimization information.
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31 */
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32 public class DebugInfo implements Serializable {
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33
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34 private static final long serialVersionUID = -6047206624915812516L;
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35
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36 private final BytecodePosition bytecodePosition;
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37 private final BitSet registerRefMap;
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38 private final BitSet frameRefMap;
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39
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40 /**
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41 * Creates a new {@code CiDebugInfo} from the given values.
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42 *
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43 * @param codePos the {@linkplain BytecodePosition code position} or {@linkplain BytecodeFrame frame} info
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44 * @param registerRefMap the register map
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45 * @param frameRefMap the reference map for {@code frame}, which may be {@code null}
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46 */
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47 public DebugInfo(BytecodePosition codePos, BitSet registerRefMap, BitSet frameRefMap) {
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48 this.bytecodePosition = codePos;
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49 this.registerRefMap = registerRefMap;
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50 this.frameRefMap = frameRefMap;
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51 }
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52
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53 /**
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54 * @return {@code true} if this debug information has a frame
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55 */
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56 public boolean hasFrame() {
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57 return getBytecodePosition() instanceof BytecodeFrame;
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58 }
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59
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60 /**
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61 * @return {@code true} if this debug info has a reference map for the registers
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62 */
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63 public boolean hasRegisterRefMap() {
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64 return getRegisterRefMap() != null && getRegisterRefMap().size() > 0;
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65 }
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66
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67 /**
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68 * @return {@code true} if this debug info has a reference map for the stack
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69 */
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70 public boolean hasStackRefMap() {
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71 return getFrameRefMap() != null && getFrameRefMap().size() > 0;
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72 }
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74
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75 /**
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76 * Gets the deoptimization information for each inlined frame (if available).
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77 *
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78 * @return {@code null} if no frame de-opt info is {@linkplain #hasDebugFrame available}
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79 */
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80 public BytecodeFrame frame() {
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81 if (hasFrame()) {
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82 return (BytecodeFrame) getBytecodePosition();
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83 }
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84 return null;
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85 }
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86
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87 @Override
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88 public String toString() {
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89 return CodeUtil.append(new StringBuilder(100), this, null).toString();
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90 }
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91
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92 /**
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93 * @return The code position (including all inlined methods) of this debug info.
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94 * If this is a {@link BytecodeFrame} instance, then it is also the deoptimization information for each inlined frame.
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95 */
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96 public BytecodePosition getBytecodePosition() {
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97 return bytecodePosition;
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98 }
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99
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100 /**
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101 * @return The reference map for the registers at this point. The reference map is <i>packed</i> in that
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102 * for bit {@code k} in byte {@code n}, it refers to the register whose
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103 * {@linkplain Register#number number} is {@code (k + n * 8)}.
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104 */
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105 public BitSet getRegisterRefMap() {
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106 return registerRefMap;
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107 }
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108
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109 /**
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110 * @return The reference map for the stack frame at this point. A set bit at {@code k} in the map
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111 * represents stack slot number {@code k}.
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112 */
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113 public BitSet getFrameRefMap() {
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114 return frameRefMap;
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115 }
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116 }