Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.common/src/jdk/vm/ci/common/JVMCIError.java @ 22672:1bbd4a7c274b

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Rename jdk.internal.jvmci to jdk.vm.ci
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Thu, 08 Oct 2015 17:28:41 -0700
parents jvmci/jdk.internal.jvmci.common/src/jdk/internal/jvmci/common/JVMCIError.java@ec96f33a101d
children
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1 /*
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2 * Copyright (c) 2011, 2014, 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 jdk.vm.ci.common;
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24
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25 import java.util.ArrayList;
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26 import java.util.Locale;
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27
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28 /**
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29 * Indicates a condition in JVMCI related code that should never occur during normal operation.
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30 */
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31 public class JVMCIError extends Error {
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32
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33 private static final long serialVersionUID = 531632331813456233L;
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34 private final ArrayList<String> context = new ArrayList<>();
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35
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36 public static RuntimeException unimplemented() {
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37 throw new JVMCIError("unimplemented");
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38 }
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39
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40 public static RuntimeException unimplemented(String msg) {
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41 throw new JVMCIError("unimplemented: %s", msg);
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42 }
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43
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44 public static RuntimeException shouldNotReachHere() {
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45 throw new JVMCIError("should not reach here");
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46 }
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47
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48 public static RuntimeException shouldNotReachHere(String msg) {
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49 throw new JVMCIError("should not reach here: %s", msg);
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50 }
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51
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52 public static RuntimeException shouldNotReachHere(Throwable cause) {
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53 throw new JVMCIError(cause);
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54 }
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55
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56 /**
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57 * Checks a given condition and throws a {@link JVMCIError} if it is false. Guarantees are
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58 * stronger than assertions in that they are always checked. Error messages for guarantee
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59 * violations should clearly indicate the nature of the problem as well as a suggested solution
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60 * if possible.
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61 *
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62 * @param condition the condition to check
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63 * @param msg the message that will be associated with the error, in
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64 * {@link String#format(String, Object...)} syntax
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65 * @param args arguments to the format string
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66 */
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67 public static void guarantee(boolean condition, String msg, Object... args) {
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68 if (!condition) {
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69 throw new JVMCIError("failed guarantee: " + msg, args);
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70 }
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71 }
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72
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73 /**
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74 * This constructor creates a {@link JVMCIError} with a given message.
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75 *
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76 * @param msg the message that will be associated with the error
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77 */
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78 public JVMCIError(String msg) {
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79 super(msg);
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80 }
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81
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82 /**
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83 * This constructor creates a {@link JVMCIError} with a message assembled via
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84 * {@link String#format(String, Object...)}. It always uses the ENGLISH locale in order to
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85 * always generate the same output.
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86 *
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87 * @param msg the message that will be associated with the error, in String.format syntax
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88 * @param args parameters to String.format - parameters that implement {@link Iterable} will be
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89 * expanded into a [x, x, ...] representation.
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90 */
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91 public JVMCIError(String msg, Object... args) {
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92 super(format(msg, args));
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93 }
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94
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95 /**
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96 * This constructor creates a {@link JVMCIError} for a given causing Throwable instance.
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97 *
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98 * @param cause the original exception that contains additional information on this error
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99 */
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100 public JVMCIError(Throwable cause) {
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101 super(cause);
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102 }
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103
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104 /**
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105 * This constructor creates a {@link JVMCIError} and adds all the
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106 * {@linkplain #addContext(String) context} of another {@link JVMCIError}.
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107 *
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108 * @param e the original {@link JVMCIError}
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109 */
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110 public JVMCIError(JVMCIError e) {
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111 super(e);
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112 context.addAll(e.context);
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113 }
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114
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115 @Override
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116 public String toString() {
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117 StringBuilder str = new StringBuilder();
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118 str.append(super.toString());
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119 for (String s : context) {
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120 str.append("\n\tat ").append(s);
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121 }
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122 return str.toString();
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123 }
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124
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125 private static String format(String msg, Object... args) {
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126 if (args != null) {
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127 // expand Iterable parameters into a list representation
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128 for (int i = 0; i < args.length; i++) {
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129 if (args[i] instanceof Iterable<?>) {
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130 ArrayList<Object> list = new ArrayList<>();
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131 for (Object o : (Iterable<?>) args[i]) {
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132 list.add(o);
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133 }
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134 args[i] = list.toString();
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135 }
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136 }
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137 }
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138 return String.format(Locale.ENGLISH, msg, args);
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139 }
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140
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141 public JVMCIError addContext(String newContext) {
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142 this.context.add(newContext);
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143 return this;
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144 }
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145
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146 public JVMCIError addContext(String name, Object obj) {
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147 return addContext(format("%s: %s", name, obj));
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148 }
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149 }