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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/impl/ProbeManager.java @ 15944:eedf6c293639

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Truffle: additional methods on ExecutionContext
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Tue, 27 May 2014 21:18:45 -0700
parents 8c34e2cc4add
children 915ebb306fcc
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15779
8c34e2cc4add Truffle/Instrumentation: significant reorganization of the instrumentation framework's implementation and connection to the runtime ExecutionContext, with some new features, including a Tag-based "trap" mechanisms.
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1 /*
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2 * Copyright (c) 2013, 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. 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
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.instrument.impl;
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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.*;
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30 import com.oracle.truffle.api.instrument.*;
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31 import com.oracle.truffle.api.instrument.impl.InstrumentationNode.ProbeCallback;
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32 import com.oracle.truffle.api.instrument.impl.InstrumentationNode.ProbeImpl;
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33 import com.oracle.truffle.api.source.*;
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34
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35 /**
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36 * Factory and services for AST {@link Probe}s
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37 */
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38 public final class ProbeManager {
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39
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40 // TODO (mlvdv) use weak references.
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41 /**
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42 * Map: SourceSection ==> probe associated with that source section in an AST.
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43 */
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44 private final Map<SourceSection, ProbeImpl> srcToProbe = new HashMap<>();
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45
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46 // TODO (mlvdv) use weak references.
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47 /**
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48 * Map: Source line ==> probes associated with source sections starting on the line.
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49 */
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50 private final Map<SourceLineLocation, Collection<Probe>> lineToProbes = new HashMap<>();
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51
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52 private final List<ProbeListener> probeListeners = new ArrayList<>();
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53
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54 private final ProbeCallback probeCallback;
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55
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56 /**
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57 * When non-null, "enter" events with matching tags will trigger a callback.
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58 */
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59 private PhylumTrap phylumTrap = null;
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60
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61 public ProbeManager() {
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62 this.probeCallback = new ProbeCallback() {
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63 /**
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64 * Receives (from the {@link Probe} implementation) and distributes notification that a
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65 * {@link Probe} has acquired a new {@linkplain PhylumTag tag}.
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66 */
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67 public void newTagAdded(ProbeImpl probe, PhylumTag tag) {
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68 for (ProbeListener listener : probeListeners) {
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69 listener.probeTaggedAs(probe, tag);
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70 }
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71 if (phylumTrap != null && tag == phylumTrap.getTag()) {
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72 probe.setTrap(phylumTrap);
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73 }
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74 }
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75 };
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76 }
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77
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78 public void addProbeListener(ProbeListener listener) {
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79 assert listener != null;
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80 probeListeners.add(listener);
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81 }
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82
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83 public void removeProbeListener(ProbeListener removeListener) {
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84 final List<ProbeListener> listeners = new ArrayList<>(probeListeners);
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85 for (ProbeListener listener : listeners) {
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86 if (listener == removeListener) {
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87 probeListeners.remove(listener);
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88 }
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89 }
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90 }
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91
15779
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92 public Probe getProbe(SourceSection sourceSection) {
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93 assert sourceSection != null;
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94
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95 ProbeImpl probe = srcToProbe.get(sourceSection);
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96
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97 if (probe != null) {
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98 return probe;
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99 }
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100 probe = InstrumentationNode.createProbe(sourceSection, probeCallback);
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101
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102 // Register new probe by unique SourceSection
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103 srcToProbe.put(sourceSection, probe);
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104
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105 // Register new probe by source line, there may be more than one
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106 // Create line location for map key
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107 final SourceLineLocation lineLocation = new SourceLineLocation(sourceSection.getSource(), sourceSection.getStartLine());
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108
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109 Collection<Probe> probes = lineToProbes.get(lineLocation);
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110 if (probes == null) {
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111 probes = new ArrayList<>(2);
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112 lineToProbes.put(lineLocation, probes);
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113 }
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114 probes.add(probe);
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115
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116 for (ProbeListener listener : probeListeners) {
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117 listener.newProbeInserted(sourceSection, probe);
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118 }
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119
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120 return probe;
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121 }
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122
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123 public Collection<Probe> findProbesTaggedAs(PhylumTag tag) {
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124 final List<Probe> probes = new ArrayList<>();
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125 for (Probe probe : srcToProbe.values()) {
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126 if (tag == null || probe.isTaggedAs(tag)) {
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127 probes.add(probe);
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128 }
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129 }
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130 return probes;
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131 }
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132
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133 public Collection<Probe> findProbesByLine(SourceLineLocation lineLocation) {
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134 final Collection<Probe> probes = lineToProbes.get(lineLocation);
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135 if (probes == null) {
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136 return Collections.emptyList();
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137 }
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138 return new ArrayList<>(probes);
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139 }
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140
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141 public void setPhylumTrap(PhylumTrap trap) {
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142 assert trap != null;
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143 if (this.phylumTrap != null) {
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144 throw new IllegalStateException("trap already set");
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145 }
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146 this.phylumTrap = trap;
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147
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148 PhylumTag tag = trap.getTag();
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149 for (ProbeImpl probe : srcToProbe.values()) {
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150 if (probe.isTaggedAs(tag)) {
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151 probe.setTrap(trap);
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152 }
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153 }
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154 }
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155
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156 public void clearPhylumTrap() {
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157 if (this.phylumTrap == null) {
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158 throw new IllegalStateException("no trap set");
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159 }
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160 for (ProbeImpl probe : srcToProbe.values()) {
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161 if (probe.isTaggedAs(phylumTrap.getTag())) {
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162 probe.setTrap(null);
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163 }
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164 }
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165 phylumTrap = null;
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166 }
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167
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168 }