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annotate graal/Compiler/src/com/sun/c1x/lir/LIRDebugInfo.java @ 2507:9ec15d6914ca

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Pull over of compiler from maxine repository.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:43:22 +0200
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2507
9ec15d6914ca Pull over of compiler from maxine repository.
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1 /*
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2 * Copyright (c) 2009, 2010, 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.sun.c1x.lir;
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24
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25 import java.util.*;
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26
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27 import com.sun.c1x.*;
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28 import com.sun.c1x.ir.*;
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29 import com.sun.c1x.value.*;
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30 import com.sun.cri.ci.*;
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31
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32 /**
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33 * This class represents debugging and deoptimization information attached to a LIR instruction.
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34 *
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35 * @author Marcelo Cintra
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36 * @author Thomas Wuerthinger
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37 * @author Ben L. Titzer
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38 */
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39 public class LIRDebugInfo {
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40
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41 public abstract static class ValueLocator {
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42 public abstract CiValue getLocation(Value value);
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43 }
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44
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45 public final FrameState state;
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46 public final List<ExceptionHandler> exceptionHandlers;
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47 public CiDebugInfo debugInfo;
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48
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49 public LIRDebugInfo(FrameState state, List<ExceptionHandler> exceptionHandlers) {
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50 assert state != null;
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51 this.state = state;
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52 this.exceptionHandlers = exceptionHandlers;
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53 }
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54
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55 private LIRDebugInfo(LIRDebugInfo info) {
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56 this.state = info.state;
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57
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58 // deep copy of exception handlers
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59 if (info.exceptionHandlers != null) {
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60 this.exceptionHandlers = new ArrayList<ExceptionHandler>(info.exceptionHandlers.size());
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61 for (ExceptionHandler h : info.exceptionHandlers) {
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62 this.exceptionHandlers.add(new ExceptionHandler(h));
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63 }
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64 } else {
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65 this.exceptionHandlers = null;
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66 }
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67 }
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68
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69 public LIRDebugInfo copy() {
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70 return new LIRDebugInfo(this);
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71 }
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72
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73 public void setOop(CiValue location, C1XCompilation compilation, CiBitMap frameRefMap, CiBitMap regRefMap) {
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74 CiTarget target = compilation.target;
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75 if (location.isAddress()) {
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76 CiAddress stackLocation = (CiAddress) location;
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77 assert stackLocation.index.isIllegal();
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78 if (stackLocation.base == CiRegister.Frame.asValue()) {
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79 int offset = stackLocation.displacement;
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80 assert offset % target.wordSize == 0 : "must be aligned";
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81 int stackMapIndex = offset / target.wordSize;
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82 setBit(frameRefMap, stackMapIndex);
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83 }
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84 } else if (location.isStackSlot()) {
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85 CiStackSlot stackSlot = (CiStackSlot) location;
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86 assert !stackSlot.inCallerFrame();
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87 assert target.spillSlotSize == target.wordSize;
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88 setBit(frameRefMap, stackSlot.index());
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89 } else {
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90 assert location.isRegister() : "objects can only be in a register";
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91 CiRegisterValue registerLocation = (CiRegisterValue) location;
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92 int reg = registerLocation.reg.number;
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93 assert reg >= 0 : "object cannot be in non-object register " + registerLocation.reg;
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94 assert reg < target.arch.registerReferenceMapBitCount;
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95 setBit(regRefMap, reg);
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96 }
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97 }
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98
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99 public CiDebugInfo debugInfo() {
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100 assert debugInfo != null : "debug info not allocated yet";
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101 return debugInfo;
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102 }
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103
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104 public boolean hasDebugInfo() {
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105 return debugInfo != null;
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106 }
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107
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108 public static void setBit(CiBitMap refMap, int bit) {
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109 assert !refMap.get(bit) : "Ref map entry " + bit + " is already set.";
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110 refMap.set(bit);
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111 }
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112
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113 @Override
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114 public String toString() {
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115 return state.toString();
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116 }
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117 }