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annotate graal/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLServer.java @ 21890:894f82515e38

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Truffle/APIs and Debugging: Evolutionary steps to integrating debugging and tool support with TruffleVM APIs - Add a version string to language registration: Language.getShortName() produces a string with both language and version - Rename SLMain --> SLLanguage (little change current machinery) - Remove DebugEngine dependence on ExecutionContext: Visualizer access migrated to TruffleLanguage - ExecutionContext now has only one method left: getCompilerOptions() - Rename SourceExecutionProvider to DebugSupportProvider, now supplied by implementing abstract TruffleLanguage.getDebugSupport() - Revise DebugEngine and its helper classes to work with the new APIs
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Tue, 09 Jun 2015 15:20:30 -0700
parents 3b8bbf51d320
children a50fa3266a0a
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1 /*
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2 * Copyright (c) 2014, 2015, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
3b8bbf51d320 Truffle/Debugging: add the Truffle DebugEngine and supporting code, as well as add a crude command-line debugging tool used mainly to test the DebugEngine. Migrate the small tols out of project com.oracle.truffle.api into the new project com.oracle.truffle.tools.
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23 * questions.
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24 */
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25 package com.oracle.truffle.sl.tools.debug;
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26
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27 import java.util.*;
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28
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29 import com.oracle.truffle.api.frame.*;
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30 import com.oracle.truffle.api.instrument.*;
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31 import com.oracle.truffle.api.nodes.*;
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32 import com.oracle.truffle.api.source.*;
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33 import com.oracle.truffle.api.vm.*;
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34 import com.oracle.truffle.api.vm.TruffleVM.Language;
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35 import com.oracle.truffle.tools.debug.engine.*;
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36 import com.oracle.truffle.tools.debug.shell.*;
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37 import com.oracle.truffle.tools.debug.shell.client.*;
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38 import com.oracle.truffle.tools.debug.shell.server.*;
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39
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40 /**
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41 * Instantiation of the "server" side of the "REPL*" debugger for the Simple language.
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42 * <p>
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43 * The SL parser is not equipped to parse program fragments, so any debugging functions that depend
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44 * on this are not supported, for example {@link DebugEngine#eval(Source, Node, MaterializedFrame)}
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45 * and {@link Breakpoint#setCondition(String)}.
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46 *
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47 * @see SimpleREPLClient
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48 */
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49 public final class SLREPLServer implements REPLServer {
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50
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51 public static void main(String[] args) {
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52 // Cheating for the prototype: start from SL, rather than from the client.
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53 final SLREPLServer server = new SLREPLServer();
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54 final SimpleREPLClient client = new SimpleREPLClient(server.language.getShortName(), server);
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55
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56 // Cheating for the prototype: allow server access to client for recursive debugging
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57 server.setClient(client);
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58
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59 try {
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60 client.start();
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61 } catch (QuitException ex) {
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62 }
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63 }
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64
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65 private final Language language;
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66 private final DebugEngine slDebugEngine;
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67 private final String statusPrefix;
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68 private final Map<String, REPLHandler> handlerMap = new HashMap<>();
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69 private SLServerContext currentServerContext;
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70 private SimpleREPLClient replClient = null;
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71
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72 private void add(REPLHandler fileHandler) {
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73 handlerMap.put(fileHandler.getOp(), fileHandler);
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74 }
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75
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76 public SLREPLServer() {
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77 add(REPLHandler.BACKTRACE_HANDLER);
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78 add(REPLHandler.BREAK_AT_LINE_HANDLER);
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79 add(REPLHandler.BREAK_AT_LINE_ONCE_HANDLER);
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80 add(REPLHandler.BREAK_AT_THROW_HANDLER);
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81 add(REPLHandler.BREAK_AT_THROW_ONCE_HANDLER);
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82 add(REPLHandler.BREAKPOINT_INFO_HANDLER);
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83 add(REPLHandler.CLEAR_BREAK_HANDLER);
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84 add(REPLHandler.CONTINUE_HANDLER);
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85 add(REPLHandler.DELETE_HANDLER);
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86 add(REPLHandler.DISABLE_BREAK_HANDLER);
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87 add(REPLHandler.ENABLE_BREAK_HANDLER);
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88 add(REPLHandler.FILE_HANDLER);
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89 add(REPLHandler.FRAME_HANDLER);
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90 add(SLREPLHandler.INFO_HANDLER);
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91 add(REPLHandler.KILL_HANDLER);
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92 add(SLREPLHandler.LOAD_RUN_SOURCE_HANDLER);
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93 add(SLREPLHandler.LOAD_STEP_SOURCE_HANDLER);
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94 add(REPLHandler.QUIT_HANDLER);
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95 add(REPLHandler.STEP_INTO_HANDLER);
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96 add(REPLHandler.STEP_OUT_HANDLER);
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97 add(REPLHandler.STEP_OVER_HANDLER);
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98 add(REPLHandler.TRUFFLE_HANDLER);
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99 add(REPLHandler.TRUFFLE_NODE_HANDLER);
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100
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101 TruffleVM vm = TruffleVM.newVM().build();
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102 this.language = vm.getLanguages().get("application/x-sl");
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103 assert language != null;
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104
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105 final SLREPLDebugClient slDebugClient = new SLREPLDebugClient(language);
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106 this.slDebugEngine = DebugEngine.create(slDebugClient, language);
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107
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108 this.statusPrefix = language.getShortName() + " REPL:";
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109 }
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110
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111 private void setClient(SimpleREPLClient replClient) {
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112 this.replClient = replClient;
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113 }
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114
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115 public REPLMessage start() {
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116
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117 this.currentServerContext = new SLServerContext(null, null, null);
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118
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119 // SL doesn't load modules (like other languages), so we just return a success
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120 final REPLMessage reply = new REPLMessage();
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121 reply.put(REPLMessage.STATUS, REPLMessage.SUCCEEDED);
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122 reply.put(REPLMessage.DISPLAY_MSG, language.getShortName() + " started");
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123 return reply;
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124 }
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125
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126 public REPLMessage[] receive(REPLMessage request) {
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127 if (currentServerContext == null) {
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128 final REPLMessage message = new REPLMessage();
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129 message.put(REPLMessage.STATUS, REPLMessage.FAILED);
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130 message.put(REPLMessage.DISPLAY_MSG, "server not started");
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131 final REPLMessage[] reply = new REPLMessage[]{message};
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132 return reply;
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133 }
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134 return currentServerContext.receive(request);
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135 }
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136
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137 /**
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138 * Execution context of a halted SL program.
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139 */
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140 public final class SLServerContext extends REPLServerContext {
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141
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142 private final SLServerContext predecessor;
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143
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144 public SLServerContext(SLServerContext predecessor, Node astNode, MaterializedFrame mFrame) {
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145 super(predecessor == null ? 0 : predecessor.getLevel() + 1, astNode, mFrame);
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146 this.predecessor = predecessor;
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147 }
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148
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149 @Override
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150 public REPLMessage[] receive(REPLMessage request) {
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151 final String command = request.get(REPLMessage.OP);
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152 final REPLHandler handler = handlerMap.get(command);
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153
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154 if (handler == null) {
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155 final REPLMessage message = new REPLMessage();
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156 message.put(REPLMessage.OP, command);
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157 message.put(REPLMessage.STATUS, REPLMessage.FAILED);
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158 message.put(REPLMessage.DISPLAY_MSG, statusPrefix + " op \"" + command + "\" not supported");
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159 final REPLMessage[] reply = new REPLMessage[]{message};
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160 return reply;
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161 }
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162 return handler.receive(request, currentServerContext);
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163 }
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164
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165 @Override
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166 public Language getLanguage() {
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167 return language;
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168 }
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169
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170 @Override
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171 public DebugEngine getDebugEngine() {
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172 return slDebugEngine;
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173 }
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174
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175 }
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176
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177 /**
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178 * Specialize the standard SL debug context by notifying the REPL client when execution is
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179 * halted, e.g. at a breakpoint.
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180 * <p>
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181 * Before notification, the server creates a new context at the halted location, in which
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182 * subsequent evaluations take place until such time as the client says to "continue".
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183 * <p>
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184 * This implementation "cheats" the intended asynchronous architecture by calling back directly
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185 * to the client with the notification.
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186 */
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187 private final class SLREPLDebugClient implements DebugClient {
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188
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189 private final Language language;
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190
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191 SLREPLDebugClient(Language language) {
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192 this.language = language;
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193 }
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194
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195 public void haltedAt(Node node, MaterializedFrame mFrame, List<String> warnings) {
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196 // Create and push a new debug context where execution is halted
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197 currentServerContext = new SLServerContext(currentServerContext, node, mFrame);
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198
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199 // Message the client that execution is halted and is in a new debugging context
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200 final REPLMessage message = new REPLMessage();
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201 message.put(REPLMessage.OP, REPLMessage.STOPPED);
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202 final SourceSection src = node.getSourceSection();
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203 final Source source = src.getSource();
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204 message.put(REPLMessage.SOURCE_NAME, source.getName());
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205 message.put(REPLMessage.FILE_PATH, source.getPath());
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206 message.put(REPLMessage.LINE_NUMBER, Integer.toString(src.getStartLine()));
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207 message.put(REPLMessage.STATUS, REPLMessage.SUCCEEDED);
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208 message.put(REPLMessage.DEBUG_LEVEL, Integer.toString(currentServerContext.getLevel()));
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209 if (!warnings.isEmpty()) {
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210 final StringBuilder sb = new StringBuilder();
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211 for (String warning : warnings) {
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212 sb.append(warning + "\n");
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213 }
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214 message.put(REPLMessage.WARNINGS, sb.toString());
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215 }
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216 try {
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217 // Cheat with synchrony: call client directly about entering a nested debugging
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218 // context.
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219 replClient.halted(message);
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220 } finally {
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221 // Returns when "continue" is called in the new debugging context
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222
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223 // Pop the debug context, and return so that the old context will continue
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224 currentServerContext = currentServerContext.predecessor;
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225 }
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226 }
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227
21890
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228 public Language getLanguage() {
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229 return language;
21568
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230 }
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231 }
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232
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233 }