Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/BytecodePosition.java @ 21610:f555efead2f2
Fix options in makefile
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 29 May 2015 20:43:55 -0700 |
parents | f5b549811bac |
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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.jvmci.code; |
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24 |
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25 import com.oracle.jvmci.meta.ResolvedJavaMethod; |
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26 import java.util.*; |
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27 |
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28 /** |
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29 * Represents a code position, that is, a chain of inlined methods with bytecode locations, that is |
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30 * communicated from the compiler to the runtime system. A code position can be used by the runtime |
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31 * system to reconstruct a source-level stack trace for exceptions and to create |
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32 * {@linkplain BytecodeFrame frames} for deoptimization. |
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33 */ |
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34 public class BytecodePosition { |
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35 |
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36 private final BytecodePosition caller; |
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37 private final ResolvedJavaMethod method; |
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38 private final int bci; |
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39 |
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40 /** |
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41 * Constructs a new object representing a given parent/caller, a given method, and a given BCI. |
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42 * |
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43 * @param caller the parent position |
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44 * @param method the method |
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45 * @param bci a BCI within the method |
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46 */ |
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47 public BytecodePosition(BytecodePosition caller, ResolvedJavaMethod method, int bci) { |
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48 assert method != null; |
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49 this.caller = caller; |
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50 this.method = method; |
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51 this.bci = bci; |
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52 } |
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53 |
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54 /** |
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55 * Converts this code position to a string representation. |
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56 * |
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57 * @return a string representation of this code position |
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58 */ |
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59 @Override |
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60 public String toString() { |
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61 return CodeUtil.append(new StringBuilder(100), this).toString(); |
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62 } |
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63 |
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64 /** |
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65 * Deep equality test. |
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66 */ |
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67 @Override |
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68 public boolean equals(Object obj) { |
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69 if (obj == this) { |
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70 return true; |
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71 } |
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72 if (obj != null && getClass() == obj.getClass()) { |
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73 BytecodePosition that = (BytecodePosition) obj; |
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74 if (this.bci == that.bci && Objects.equals(this.getMethod(), that.getMethod()) && Objects.equals(this.caller, that.caller)) { |
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75 return true; |
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76 } |
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77 } |
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78 return false; |
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79 } |
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80 |
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81 @Override |
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82 public int hashCode() { |
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83 return getBCI(); |
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84 } |
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85 |
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86 /** |
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87 * @return The location within the method, as a bytecode index. The constant {@code -1} may be |
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88 * used to indicate the location is unknown, for example within code synthesized by the |
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89 * compiler. |
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90 */ |
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91 public int getBCI() { |
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92 return bci; |
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93 } |
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94 |
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95 /** |
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96 * @return The runtime interface method for this position. |
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97 */ |
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98 public ResolvedJavaMethod getMethod() { |
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99 return method; |
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100 } |
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101 |
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102 /** |
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103 * The position where this position has been called, {@code null} if none. |
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104 */ |
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105 public BytecodePosition getCaller() { |
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106 return caller; |
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107 } |
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108 |
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109 /** |
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110 * Adds a caller to the current position returning the new position. |
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111 */ |
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112 public BytecodePosition addCaller(BytecodePosition link) { |
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113 if (getCaller() == null) { |
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114 return new BytecodePosition(link, getMethod(), getBCI()); |
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115 } else { |
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116 return new BytecodePosition(getCaller().addCaller(link), getMethod(), getBCI()); |
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117 } |
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118 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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