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1 | /******************************************************************************* |
2 | * Copyright (c) 2011, 2013 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Marc Dumais - Initial implementation | |
11 | * Francois Chouinard - Initial API and implementation | |
12 | * Patrick Tasse - Updated for TMF 2.0 | |
13 | *******************************************************************************/ | |
14 | ||
8343b1f5 | 15 | package org.eclipse.linuxtools.internal.gdbtrace.core.trace; |
6de2f761 PT |
16 | |
17 | import org.eclipse.core.resources.IProject; | |
18 | import org.eclipse.core.resources.IResource; | |
19 | import org.eclipse.core.runtime.CoreException; | |
20 | import org.eclipse.core.runtime.QualifiedName; | |
8343b1f5 PT |
21 | import org.eclipse.linuxtools.internal.gdbtrace.core.GdbTraceCorePlugin; |
22 | import org.eclipse.linuxtools.internal.gdbtrace.core.event.GdbTraceEvent; | |
6de2f761 PT |
23 | import org.eclipse.linuxtools.tmf.core.event.ITmfEvent; |
24 | import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException; | |
25 | import org.eclipse.linuxtools.tmf.core.timestamp.ITmfTimestamp; | |
26 | import org.eclipse.linuxtools.tmf.core.trace.ITmfContext; | |
27 | import org.eclipse.linuxtools.tmf.core.trace.ITmfEventParser; | |
28 | import org.eclipse.linuxtools.tmf.core.trace.ITmfLocation; | |
29 | import org.eclipse.linuxtools.tmf.core.trace.TmfContext; | |
30 | import org.eclipse.linuxtools.tmf.core.trace.TmfLongLocation; | |
31 | import org.eclipse.linuxtools.tmf.core.trace.TmfTrace; | |
32 | ||
33 | /** | |
34 | * GDB Tracepoint extension of TmfTrace. This class implements the necessary | |
35 | * methods and functionalities so that a GDB tracepoint file can be used by | |
36 | * the TMF framework as a "tracer". | |
37 | * <p> | |
38 | * @author Marc Dumais | |
39 | * @author Francois Chouinard | |
40 | */ | |
41 | public class GdbTrace extends TmfTrace implements ITmfEventParser { | |
42 | ||
43 | // ------------------------------------------------------------------------ | |
44 | // Constants | |
45 | // ------------------------------------------------------------------------ | |
46 | ||
47 | private static final int CACHE_SIZE = 20; | |
48 | private static final String GDB_EXECUTABLE = "gdb"; //$NON-NLS-1$ | |
49 | ||
50 | /** The qualified name for the 'executable' persistent property */ | |
51 | public static final QualifiedName EXEC_KEY = new QualifiedName(GdbTraceCorePlugin.PLUGIN_ID, "executable"); //$NON-NLS-1$ | |
52 | ||
53 | // ------------------------------------------------------------------------ | |
54 | // Attributes | |
55 | // ------------------------------------------------------------------------ | |
56 | ||
57 | // Interface to access GDB Tracepoints | |
58 | private DsfGdbAdaptor fGdbTpRef; | |
59 | private long fNbFrames = 0; | |
60 | ||
61 | // The trace location | |
62 | long fLocation; | |
63 | ||
64 | // ------------------------------------------------------------------------ | |
65 | // Constructor | |
66 | // ------------------------------------------------------------------------ | |
67 | ||
68 | /** | |
69 | * Default constructor | |
70 | */ | |
71 | public GdbTrace() { | |
72 | setCacheSize(CACHE_SIZE); | |
73 | } | |
74 | ||
75 | @Override | |
76 | public boolean validate(IProject project, String path) { | |
77 | return fileExists(path); | |
78 | } | |
79 | ||
80 | @Override | |
81 | public void initTrace(IResource resource, String path, Class<? extends ITmfEvent> type) throws TmfTraceException { | |
82 | try { | |
83 | String tracedExecutable = resource.getPersistentProperty(EXEC_KEY); | |
84 | if (tracedExecutable == null) { | |
85 | throw new TmfTraceException("Trace executable not set"); //$NON-NLS-1$ | |
86 | } | |
87 | fGdbTpRef = new DsfGdbAdaptor(this, GDB_EXECUTABLE, path, tracedExecutable); | |
88 | fNbFrames = fGdbTpRef.getNumberOfFrames(); | |
89 | } catch (CoreException e) { | |
90 | throw new TmfTraceException("Failed to initialize trace", e); //$NON-NLS-1$ | |
91 | } | |
92 | ||
93 | super.initTrace(resource, path, type); | |
94 | } | |
95 | ||
96 | @Override | |
97 | public synchronized void dispose() { | |
98 | if (fGdbTpRef != null) { | |
99 | fGdbTpRef.dispose(); | |
100 | } | |
101 | super.dispose(); | |
102 | } | |
103 | ||
104 | /** | |
105 | * @return GDB-DSF session id | |
106 | */ | |
107 | public String getDsfSessionId () { | |
108 | return fGdbTpRef.getSessionId(); | |
109 | } | |
110 | ||
111 | /** | |
112 | * @return the number of frames in current tp session | |
113 | */ | |
114 | public long getNbFrames () { | |
115 | fNbFrames = fGdbTpRef.getNumberOfFrames(); | |
116 | return fNbFrames; | |
117 | } | |
118 | ||
119 | // ------------------------------------------------------------------------ | |
120 | // TmfTrace | |
121 | // ------------------------------------------------------------------------ | |
122 | ||
123 | @Override | |
124 | public synchronized TmfContext seekEvent(ITmfLocation location) { | |
125 | fLocation = (location != null) ? ((Long) location.getLocationInfo()) : 0; | |
126 | return new TmfContext(new TmfLongLocation(fLocation), fLocation); | |
127 | } | |
128 | ||
129 | @Override | |
130 | public synchronized ITmfContext seekEvent(double ratio) { | |
131 | TmfContext context = seekEvent((long) ratio * getNbEvents()); | |
132 | return context; | |
133 | } | |
134 | ||
135 | @Override | |
136 | public double getLocationRatio(ITmfLocation location) { | |
137 | if (getNbEvents() > 0 && location instanceof TmfLongLocation) { | |
138 | return (double) ((TmfLongLocation) location).getLocationInfo() / getNbEvents(); | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
143 | @Override | |
144 | public ITmfLocation getCurrentLocation() { | |
145 | return new TmfLongLocation(fLocation); | |
146 | } | |
147 | ||
148 | @Override | |
149 | public GdbTraceEvent parseEvent(ITmfContext context) { | |
150 | if (context.getRank() >= fNbFrames) { | |
151 | return null; | |
152 | } | |
153 | // work-around to ensure that the select and parse of trace frame will be atomic | |
154 | GdbTraceEvent event = fGdbTpRef.selectAndReadFrame(context.getRank()); | |
155 | fLocation++; | |
156 | return event; | |
157 | } | |
158 | ||
159 | @Override | |
160 | public synchronized TmfContext seekEvent(ITmfTimestamp timestamp) { | |
161 | long rank = timestamp.getValue(); | |
162 | return seekEvent(rank); | |
163 | } | |
164 | ||
165 | @Override | |
166 | public synchronized TmfContext seekEvent(long rank) { | |
167 | fLocation = rank; | |
168 | TmfContext context = new TmfContext(new TmfLongLocation(fLocation), rank); | |
169 | return context; | |
170 | } | |
171 | ||
172 | /** | |
173 | * Select a frame and update the visualization | |
174 | * @param rank the rank | |
175 | */ | |
176 | public void selectFrame(long rank) { | |
177 | fGdbTpRef.selectDataFrame(rank, true); | |
178 | } | |
179 | } |