Mercurial > hg > truffle
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiFrame.java @ 4558:3706975946e4
Make graph dumping a bit more robust when there is no method, enable debug in the startCompiler method, add context and scope for snippets installation
Made IGV display graphs even if some edges are problematic
When schedule failed don't use it
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Fri, 10 Feb 2012 02:22:23 +0100 |
parents | aaac4894175c |
children | a03f3fd16b22 |
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1 /* |
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2 * Copyright (c) 2009, 2012, 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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24 |
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25 import java.io.*; |
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26 |
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27 import com.oracle.max.cri.ri.*; |
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28 |
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29 /** |
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30 * Represents the Java bytecode frame state(s) at a given position |
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31 * including {@link CiValue locations} where to find the local variables, |
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32 * operand stack values and locked objects of the bytecode frame(s). |
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33 */ |
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34 public class CiFrame extends CiCodePos implements Serializable { |
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35 private static final long serialVersionUID = -345025397165977565L; |
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36 |
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37 /** |
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38 * An array of values representing how to reconstruct the state of the Java frame. |
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39 * This is array is partitioned as follows: |
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40 * <p> |
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41 * <table border="1" cellpadding="5" frame="void", rules="all"> |
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42 * <tr><th>Start index (inclusive)</th><th>End index (exclusive)</th><th>Description</th></tr> |
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43 * <tr><td>0</td> <td>numLocals</td> <td>Local variables</td></tr> |
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44 * <tr><td>numLocals</td> <td>numLocals + numStack</td><td>Operand stack</td></tr> |
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45 * <tr><td>numLocals + numStack</td><td>values.length</td> <td>Locked objects</td></tr> |
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46 * </table> |
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47 * <p> |
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48 * Note that the number of locals and the number of stack slots may be smaller than the |
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49 * maximum number of locals and stack slots as specified in the compiled method. |
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50 */ |
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51 public final CiValue[] values; |
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52 |
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53 /** |
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54 * The number of locals in the values array. |
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55 */ |
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56 public final int numLocals; |
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57 |
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58 /** |
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59 * The number of stack slots in the values array. |
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60 */ |
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61 public final int numStack; |
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62 |
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63 /** |
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64 * The number of locks in the values array. |
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65 */ |
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66 public final int numLocks; |
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67 |
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68 public final boolean rethrowException; |
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69 |
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70 /** |
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71 * Creates a new frame object. |
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72 * |
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73 * @param caller the caller frame (which may be {@code null}) |
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74 * @param method the method |
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75 * @param bci a BCI within the method |
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76 * @param rethrowException specifies if the VM should re-throw the pending exception when deopt'ing using this frame |
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77 * @param values the frame state {@link #values} |
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78 * @param numLocals the number of local variables |
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79 * @param numStack the depth of the stack |
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80 * @param numLocks the number of locked objects |
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81 */ |
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82 public CiFrame(CiFrame caller, RiResolvedMethod method, int bci, boolean rethrowException, CiValue[] values, int numLocals, int numStack, int numLocks) { |
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83 super(caller, method, bci); |
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84 assert values != null; |
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85 this.rethrowException = rethrowException; |
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86 this.values = values; |
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87 this.numLocks = numLocks; |
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88 this.numLocals = numLocals; |
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89 this.numStack = numStack; |
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90 assert !rethrowException || numStack == 1 : "must have exception on top of the stack"; |
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91 } |
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92 |
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93 /** |
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94 * Gets the value representing the specified local variable. |
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95 * @param i the local variable index |
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96 * @return the value that can be used to reconstruct the local's current value |
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97 */ |
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98 public CiValue getLocalValue(int i) { |
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99 return values[i]; |
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100 } |
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101 |
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102 /** |
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103 * Gets the value representing the specified stack slot. |
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104 * @param i the stack index |
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105 * @return the value that can be used to reconstruct the stack slot's current value |
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106 */ |
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107 public CiValue getStackValue(int i) { |
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108 return values[i + numLocals]; |
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109 } |
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110 |
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111 /** |
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112 * Gets the value representing the specified lock. |
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113 * @param i the lock index |
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114 * @return the value that can be used to reconstruct the lock's current value |
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115 */ |
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116 public CiValue getLockValue(int i) { |
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117 return values[i + numLocals + numStack]; |
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118 } |
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119 |
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120 /** |
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121 * Gets the caller of this frame. |
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122 * |
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123 * @return {@code null} if this frame has no caller |
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124 */ |
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125 public CiFrame caller() { |
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126 return (CiFrame) caller; |
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127 } |
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128 |
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129 @Override |
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130 public String toString() { |
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131 return CiUtil.append(new StringBuilder(100), this).toString(); |
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132 } |
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133 } |