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annotate truffle/com.oracle.truffle.tools.debug.shell/src/com/oracle/truffle/tools/debug/shell/server/REPLServerContext.java @ 22325:414e82b9fc35

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Release 0.9 is out, let's remove deprecated elements from the API
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Fri, 23 Oct 2015 20:23:00 +0200
parents b56fe0d3b560
children 163fdf64587d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
21568
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.
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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1 /*
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2 * Copyright (c) 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
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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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
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.
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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15 * accompanied this code).
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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16 *
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17 * You should have received a copy of the GNU General Public License version
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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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
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23 * questions.
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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24 */
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25 package com.oracle.truffle.tools.debug.shell.server;
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26
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27 import com.oracle.truffle.api.debug.Breakpoint;
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28 import com.oracle.truffle.api.debug.Debugger;
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29 import com.oracle.truffle.api.debug.SuspendedEvent;
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30 import com.oracle.truffle.api.frame.FrameInstance;
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31 import com.oracle.truffle.api.frame.MaterializedFrame;
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32 import com.oracle.truffle.api.instrument.Visualizer;
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33 import com.oracle.truffle.api.instrument.impl.DefaultVisualizer;
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34 import com.oracle.truffle.api.nodes.Node;
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35 import com.oracle.truffle.api.vm.PolyglotEngine;
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36 import com.oracle.truffle.api.vm.PolyglotEngine.Language;
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37 import com.oracle.truffle.tools.debug.shell.REPLMessage;
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38 import java.io.IOException;
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39 import java.util.ArrayList;
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40 import java.util.Collections;
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41 import java.util.List;
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42
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43 public abstract class REPLServerContext {
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44
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45 private final int level;
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46 private final SuspendedEvent event;
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47
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48 protected REPLServerContext(int level, SuspendedEvent event) {
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49 this.level = level;
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50 this.event = event;
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51 }
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52
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53 /**
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54 * The nesting depth of this context in the current session.
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55 */
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56 public int getLevel() {
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57 return level;
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58 }
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59
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60 /**
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61 * The AST node where execution is halted in this context.
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62 */
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63 public Node getNodeAtHalt() {
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64 return event.getNode();
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65 }
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66
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67 /**
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68 * Evaluates given code snippet in the context of currently suspended execution.
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69 *
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70 * @param code the snippet to evaluate
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71 * @param frame <code>null</code> in case the evaluation should happen in top most frame,
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72 * non-null value
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73 * @return result of the evaluation
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74 * @throws IOException if something goes wrong
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75 */
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76 public Object eval(String code, FrameInstance frame) throws IOException {
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77 return event.eval(code, frame);
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78 }
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79
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80 /**
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81 * The frame where execution is halted in this context.
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82 */
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83 public MaterializedFrame getFrameAtHalt() {
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84 return event.getFrame();
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85 }
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86
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87 public abstract Language getLanguage();
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88
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89 public Visualizer getVisualizer() {
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90 return new DefaultVisualizer();
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91 }
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92
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93 public PolyglotEngine engine() {
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94 throw new IllegalStateException();
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95 }
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96
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97 protected abstract Debugger db();
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98
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99 /**
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100 * Dispatches a REPL request to the appropriate handler.
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101 */
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102 public abstract REPLMessage[] receive(REPLMessage request);
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103
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104 public abstract void registerBreakpoint(Breakpoint breakpoint);
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105
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106 public abstract Breakpoint findBreakpoint(int id);
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107
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108 public abstract int getBreakpointID(Breakpoint breakpoint);
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109
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110 /**
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111 * Provides access to the execution stack.
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112 *
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113 * @return immutable list of stack elements
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114 */
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115 public List<FrameDebugDescription> getStack() {
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116 List<FrameDebugDescription> frames = new ArrayList<>();
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117 int frameCount = 1;
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118 for (FrameInstance frameInstance : event.getStack()) {
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119 if (frameCount == 1) {
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120 frames.add(new FrameDebugDescription(frameCount, event.getNode(), frameInstance));
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121 } else {
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122 frames.add(new FrameDebugDescription(frameCount, frameInstance.getCallNode(), frameInstance));
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123 }
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124 frameCount++;
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125 }
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126 return Collections.unmodifiableList(frames);
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127 }
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128
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129 void prepareStepOut() {
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130 event.prepareStepOut();
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131 }
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132
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133 void prepareStepInto(int repeat) {
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134 event.prepareStepInto(repeat);
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135 }
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136
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137 void prepareStepOver(int repeat) {
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138 event.prepareStepOver(repeat);
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139 }
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140
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141 void prepareContinue() {
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142 event.prepareContinue();
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143 }
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144 }