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annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ExceptionHandler.java @ 21644:2c6802ac343c

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Use graph builder plugin instead of node intrinsic for guarding non-null in snippets.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 01 Jun 2015 22:12:57 +0200
parents 48c1ebd24120
children
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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.jvmci.meta;
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24
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25 import java.util.*;
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26
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27 /**
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28 * Represents an exception handler within the bytecodes.
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29 */
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30 public final class ExceptionHandler {
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31
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32 private final int startBCI;
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33 private final int endBCI;
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34 private final int handlerBCI;
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35 private final int catchTypeCPI;
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36 private final JavaType catchType;
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37
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38 /**
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39 * Creates a new exception handler with the specified ranges.
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40 *
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41 * @param startBCI the start index of the protected range
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42 * @param endBCI the end index of the protected range
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43 * @param catchBCI the index of the handler
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44 * @param catchTypeCPI the index of the throwable class in the constant pool
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45 * @param catchType the type caught by this exception handler
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46 */
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47 public ExceptionHandler(int startBCI, int endBCI, int catchBCI, int catchTypeCPI, JavaType catchType) {
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48 this.startBCI = startBCI;
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49 this.endBCI = endBCI;
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50 this.handlerBCI = catchBCI;
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51 this.catchTypeCPI = catchTypeCPI;
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52 this.catchType = catchType;
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53 }
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54
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55 /**
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56 * Returns the start bytecode index of the protected range of this handler.
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57 */
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58 public int getStartBCI() {
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59 return startBCI;
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60 }
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61
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62 /**
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63 * Returns the end bytecode index of the protected range of this handler.
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64 */
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65 public int getEndBCI() {
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66 return endBCI;
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67 }
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68
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69 /**
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70 * Returns the bytecode index of the handler block of this handler.
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71 */
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72 public int getHandlerBCI() {
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73 return handlerBCI;
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74 }
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75
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76 /**
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77 * Returns the index into the constant pool representing the type of exception caught by this
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78 * handler.
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79 */
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80 public int catchTypeCPI() {
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81 return catchTypeCPI;
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82 }
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83
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84 /**
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85 * Checks whether this handler catches all exceptions.
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86 *
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87 * @return {@code true} if this handler catches all exceptions
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88 */
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89 public boolean isCatchAll() {
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90 return catchTypeCPI == 0;
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91 }
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93 /**
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94 * Returns the type of exception caught by this exception handler.
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95 */
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96 public JavaType getCatchType() {
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97 return catchType;
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98 }
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99
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100 @Override
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101 public boolean equals(Object obj) {
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102 if (!(obj instanceof ExceptionHandler)) {
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103 return false;
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104 }
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105 ExceptionHandler that = (ExceptionHandler) obj;
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106 if (this.startBCI != that.startBCI || this.endBCI != that.endBCI || this.handlerBCI != that.handlerBCI || this.catchTypeCPI != that.catchTypeCPI) {
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107 return false;
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108 }
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109 return Objects.equals(this.catchType, that.catchType);
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110 }
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111
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112 @Override
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113 public String toString() {
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114 return "ExceptionHandler<startBCI=" + startBCI + ", endBCI=" + endBCI + ", handlerBCI=" + handlerBCI + ", catchTypeCPI=" + catchTypeCPI + ", catchType=" + catchType + ">";
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115 }
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116
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117 @Override
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118 public int hashCode() {
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119 return catchTypeCPI ^ endBCI ^ handlerBCI;
c9dd3d5000e8 added ExceptionHandler.hashCode() to remove Eclipse warning
Doug Simon <doug.simon@oracle.com>
parents: 13305
diff changeset
120 }
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
121 }