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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiDebugInfo.java @ 4199:aaac4894175c

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Renamed cri packages from sun to oracle.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 03 Jan 2012 16:29:28 +0100
parents graal/com.oracle.max.cri/src/com/sun/cri/ci/CiDebugInfo.java@bc8527f3071c
children 12c63380e7ff
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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.max.cri.ci;
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25 import java.io.*;
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26
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27 /**
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28 * Represents the debugging information for a particular place in the code,
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29 * which includes the code position, a reference map, and deoptimization information.
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30 */
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31 public class CiDebugInfo implements Serializable {
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32
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33 /**
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34 *
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35 */
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36 private static final long serialVersionUID = -6047206624915812516L;
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37
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38 /**
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39 * The code position (including all inlined methods) of this debug info.
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40 * If this is a {@link CiFrame} instance, then it is also the deoptimization information for each inlined frame.
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41 */
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42 public final CiCodePos codePos;
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43
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44 /**
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45 * The reference map for the registers at this point. The reference map is <i>packed</i> in that
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46 * for bit {@code k} in byte {@code n}, it refers to the register whose
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47 * {@linkplain CiRegister#number number} is {@code (k + n * 8)}.
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48 */
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49 public final CiBitMap registerRefMap;
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50
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51 /**
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52 * The reference map for the stack frame at this point. A set bit at {@code k} in the map
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53 * represents stack slot number {@code k}.
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54 */
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55 public final CiBitMap frameRefMap;
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56
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57 /**
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58 * Creates a new {@code CiDebugInfo} from the given values.
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59 *
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60 * @param codePos the {@linkplain CiCodePos code position} or {@linkplain CiFrame frame} info
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61 * @param registerRefMap the register map
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62 * @param frameRefMap the reference map for {@code frame}, which may be {@code null}
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63 */
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64 public CiDebugInfo(CiCodePos codePos, CiBitMap registerRefMap, CiBitMap frameRefMap) {
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65 this.codePos = codePos;
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66 this.registerRefMap = registerRefMap;
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67 this.frameRefMap = frameRefMap;
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68 }
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70 /**
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71 * @return {@code true} if this debug information has a frame
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72 */
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73 public boolean hasFrame() {
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74 return codePos instanceof CiFrame;
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75 }
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76
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77 /**
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78 * @return {@code true} if this debug info has a reference map for the registers
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79 */
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80 public boolean hasRegisterRefMap() {
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81 return registerRefMap != null && registerRefMap.size() > 0;
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82 }
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83
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84 /**
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85 * @return {@code true} if this debug info has a reference map for the stack
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86 */
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87 public boolean hasStackRefMap() {
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88 return frameRefMap != null && frameRefMap.size() > 0;
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89 }
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92 /**
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93 * Gets the deoptimization information for each inlined frame (if available).
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94 *
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95 * @return {@code null} if no frame de-opt info is {@linkplain #hasDebugFrame available}
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96 */
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97 public CiFrame frame() {
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98 if (hasFrame()) {
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99 return (CiFrame) codePos;
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100 }
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101 return null;
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102 }
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103
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104 @Override
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105 public String toString() {
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106 return CiUtil.append(new StringBuilder(100), this, null).toString();
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107 }
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108 }