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e8251298 | 1 | /******************************************************************************* |
ed902a2b | 2 | * Copyright (c) 2013, 2015 Ericsson |
e8251298 PT |
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 | * Patrick Tasse - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
2bdf0193 | 13 | package org.eclipse.tracecompass.tmf.core.callstack; |
e8251298 | 14 | |
d0c7e4ba AM |
15 | import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull; |
16 | ||
17 | import org.eclipse.jdt.annotation.NonNull; | |
b489a029 | 18 | import org.eclipse.osgi.util.NLS; |
2bdf0193 | 19 | import org.eclipse.tracecompass.internal.tmf.core.Activator; |
d0c7e4ba | 20 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder; |
e894a508 AM |
21 | import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException; |
22 | import org.eclipse.tracecompass.statesystem.core.exceptions.StateValueTypeException; | |
23 | import org.eclipse.tracecompass.statesystem.core.exceptions.TimeRangeException; | |
24 | import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue; | |
25 | import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue; | |
2bdf0193 AM |
26 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; |
27 | import org.eclipse.tracecompass.tmf.core.statesystem.AbstractTmfStateProvider; | |
2bdf0193 | 28 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace; |
e8251298 PT |
29 | |
30 | /** | |
31 | * The state provider for traces that support the Call Stack view. | |
32 | * | |
33 | * The attribute tree should have the following structure: | |
34 | *<pre> | |
35 | * (root) | |
36 | * \-- Threads | |
37 | * |-- (Thread 1) | |
38 | * | \-- CallStack (stack-attribute) | |
39 | * | |-- 1 | |
40 | * | |-- 2 | |
41 | * | ... | |
42 | * | \-- n | |
43 | * |-- (Thread 2) | |
44 | * | \-- CallStack (stack-attribute) | |
45 | * | |-- 1 | |
46 | * | |-- 2 | |
47 | * | ... | |
48 | * | \-- n | |
49 | * ... | |
50 | * \-- (Thread n) | |
51 | * \-- CallStack (stack-attribute) | |
52 | * |-- 1 | |
53 | * |-- 2 | |
54 | * ... | |
55 | * \-- n | |
56 | *</pre> | |
57 | * where: | |
58 | * <br> | |
ac31f2fb PT |
59 | * (Thread n) is an attribute whose name is the display name of the thread. |
60 | * Optionally, its value is a long representing the thread id, used for sorting. | |
e8251298 PT |
61 | * <br> |
62 | * CallStack is a stack-attribute whose pushed values are either a string, | |
63 | * int or long representing the function name or address in the call stack. | |
64 | * The type of value used must be constant for a particular CallStack. | |
65 | * | |
66 | * @author Patrick Tasse | |
e8251298 | 67 | */ |
0fe46f2a | 68 | public abstract class CallStackStateProvider extends AbstractTmfStateProvider { |
e8251298 | 69 | |
e8251298 PT |
70 | /** Thread attribute */ |
71 | public static final String THREADS = "Threads"; //$NON-NLS-1$ | |
72 | /** CallStack stack-attribute */ | |
73 | public static final String CALL_STACK = "CallStack"; //$NON-NLS-1$ | |
74 | /** Undefined function exit name */ | |
75 | public static final String UNDEFINED = "UNDEFINED"; //$NON-NLS-1$ | |
76 | ||
50659279 | 77 | /** CallStack state system ID */ |
d0c7e4ba | 78 | private static final @NonNull String ID = "org.eclipse.linuxtools.tmf.callstack"; //$NON-NLS-1$ |
b489a029 AM |
79 | /** Dummy function name for when no function is expected */ |
80 | private static final String NO_FUNCTION = "no function"; //$NON-NLS-1$ | |
81 | ||
e8251298 PT |
82 | /** |
83 | * Default constructor | |
84 | * | |
85 | * @param trace | |
86 | * The trace for which we build this state system | |
87 | */ | |
d0c7e4ba | 88 | public CallStackStateProvider(@NonNull ITmfTrace trace) { |
e2bcc8a5 | 89 | super(trace, ID); |
e8251298 PT |
90 | } |
91 | ||
e8251298 PT |
92 | @Override |
93 | protected void eventHandle(ITmfEvent event) { | |
b489a029 AM |
94 | if (!considerEvent(event)) { |
95 | return; | |
96 | } | |
d0c7e4ba AM |
97 | |
98 | ITmfStateSystemBuilder ss = checkNotNull(getStateSystemBuilder()); | |
99 | ||
e8251298 | 100 | try { |
b489a029 AM |
101 | /* Check if the event is a function entry */ |
102 | String functionEntryName = functionEntry(event); | |
e8251298 | 103 | if (functionEntryName != null) { |
16801c72 | 104 | long timestamp = event.getTimestamp().toNanos(); |
b489a029 | 105 | String thread = getThreadName(event); |
ac31f2fb PT |
106 | int threadQuark = ss.getQuarkAbsoluteAndAdd(THREADS, thread); |
107 | Long threadId = getThreadId(event); | |
108 | if (threadId != null) { | |
109 | ss.updateOngoingState(TmfStateValue.newValueLong(threadId), threadQuark); | |
110 | } | |
111 | int callStackQuark = ss.getQuarkRelativeAndAdd(threadQuark, CALL_STACK); | |
e8251298 | 112 | ITmfStateValue value = TmfStateValue.newValueString(functionEntryName); |
ac31f2fb | 113 | ss.pushAttribute(timestamp, value, callStackQuark); |
b489a029 AM |
114 | return; |
115 | } | |
116 | ||
117 | /* Check if the event is a function exit */ | |
118 | String functionExitName = functionExit(event); | |
119 | if (functionExitName != null) { | |
16801c72 | 120 | long timestamp = event.getTimestamp().toNanos(); |
b489a029 | 121 | String thread = getThreadName(event); |
e8251298 | 122 | int quark = ss.getQuarkAbsoluteAndAdd(THREADS, thread, CALL_STACK); |
b489a029 AM |
123 | ITmfStateValue poppedValue = ss.popAttribute(timestamp, quark); |
124 | String poppedName = (poppedValue == null ? NO_FUNCTION : poppedValue.unboxStr()); | |
125 | ||
126 | /* | |
127 | * Verify that the value we are popping matches the one in the | |
128 | * event field, unless the latter is undefined. | |
129 | */ | |
130 | if (!functionExitName.equals(UNDEFINED) && | |
131 | !functionExitName.equals(poppedName)) { | |
132 | Activator.logWarning(NLS.bind( | |
133 | Messages.CallStackStateProvider_UnmatchedPoppedValue, | |
134 | functionExitName, | |
135 | poppedName)); | |
136 | } | |
e8251298 | 137 | } |
b489a029 | 138 | |
e8251298 PT |
139 | } catch (TimeRangeException e) { |
140 | e.printStackTrace(); | |
141 | } catch (AttributeNotFoundException e) { | |
142 | e.printStackTrace(); | |
143 | } catch (StateValueTypeException e) { | |
144 | e.printStackTrace(); | |
145 | } | |
146 | } | |
147 | ||
148 | /** | |
b489a029 AM |
149 | * Check if this event should be considered at all for function entry/exit |
150 | * analysis. This check is only run once per event, before | |
151 | * {@link #functionEntry} and {@link #functionExit} (to avoid repeating | |
152 | * checks in those methods). | |
153 | * | |
154 | * @param event | |
155 | * The event to check | |
156 | * @return If false, the event will be ignored by the state provider. If | |
157 | * true processing will continue. | |
e8251298 | 158 | */ |
b489a029 | 159 | protected abstract boolean considerEvent(ITmfEvent event); |
e8251298 PT |
160 | |
161 | /** | |
b489a029 AM |
162 | * Check an event if it indicates a function entry. |
163 | * | |
164 | * @param event | |
165 | * An event to check for function entry | |
166 | * @return The function name of the function entry, or null if not a | |
167 | * function entry. | |
168 | */ | |
169 | protected abstract String functionEntry(ITmfEvent event); | |
170 | ||
171 | /** | |
172 | * Check an event if it indicates a function exit. | |
173 | * | |
174 | * @param event | |
175 | * An event to check for function exit | |
176 | * @return The function name, or UNDEFINED, for a function exit, or null if | |
177 | * not a function exit. | |
e8251298 | 178 | */ |
b489a029 | 179 | protected abstract String functionExit(ITmfEvent event); |
e8251298 PT |
180 | |
181 | /** | |
b489a029 AM |
182 | * Return the thread name of a function entry or exit event. |
183 | * | |
184 | * @param event | |
185 | * The event | |
186 | * @return The thread name (as will be shown in the view) | |
e8251298 | 187 | */ |
b489a029 | 188 | protected abstract String getThreadName(ITmfEvent event); |
ac31f2fb PT |
189 | |
190 | /** | |
191 | * Return the thread id of a function entry event. | |
192 | * | |
193 | * @param event | |
194 | * The event | |
195 | * @return The thread id, or null if undefined | |
ac31f2fb PT |
196 | */ |
197 | protected Long getThreadId(ITmfEvent event) { | |
198 | return null; | |
199 | } | |
e8251298 | 200 | } |