analysis/org.eclipse.tracecompass.analysis.os.linux.ui/src/org/eclipse/tracecompass/internal/analysis/os/linux/ui/views/controlflow/ControlFlowView.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2016 Ericsson, École Polytechnique de Montréal and others.
   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  *   Geneviève Bastien - Move code to provide base classes for time graph view
  12  *   Christian Mansky - Add check active / uncheck inactive buttons
  13  *   Mahdi Zolnouri & Samuel Gagnon - Add flat / hierarchical button
  14  *******************************************************************************/
  15
  16 package org.eclipse.tracecompass.internal.analysis.os.linux.ui.views.controlflow;
  17
  18 import java.util.ArrayList;
  19 import java.util.Collection;
  20 import java.util.Collections;
  21 import java.util.Comparator;
  22 import java.util.HashMap;
  23 import java.util.HashSet;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.Set;
  27 import java.util.function.Function;
  28 import java.util.function.Predicate;
  29 import java.util.stream.Collectors;
  30 import java.util.stream.Stream;
  31
  32 import org.eclipse.core.runtime.IProgressMonitor;
  33 import org.eclipse.core.runtime.IStatus;
  34 import org.eclipse.core.runtime.Status;
  35 import org.eclipse.core.runtime.jobs.ISchedulingRule;
  36 import org.eclipse.core.runtime.jobs.Job;
  37 import org.eclipse.jdt.annotation.NonNull;
  38 import org.eclipse.jdt.annotation.Nullable;
  39 import org.eclipse.jface.action.Action;
  40 import org.eclipse.jface.action.IAction;
  41 import org.eclipse.jface.action.IMenuManager;
  42 import org.eclipse.jface.action.IToolBarManager;
  43 import org.eclipse.jface.action.MenuManager;
  44 import org.eclipse.jface.action.Separator;
  45 import org.eclipse.jface.dialogs.IDialogSettings;
  46 import org.eclipse.jface.viewers.ISelection;
  47 import org.eclipse.jface.viewers.StructuredSelection;
  48 import org.eclipse.swt.widgets.Composite;
  49 import org.eclipse.swt.widgets.Event;
  50 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelAnalysisModule;
  51 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelTidAspect;
  52 import org.eclipse.tracecompass.common.core.StreamUtils.StreamFlattener;
  53 import org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.Attributes;
  54 import org.eclipse.tracecompass.internal.analysis.os.linux.ui.Activator;
  55 import org.eclipse.tracecompass.internal.analysis.os.linux.ui.Messages;
  56 import org.eclipse.tracecompass.internal.analysis.os.linux.ui.actions.FollowThreadAction;
  57 import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem;
  58 import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException;
  59 import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException;
  60 import org.eclipse.tracecompass.statesystem.core.exceptions.StateValueTypeException;
  61 import org.eclipse.tracecompass.statesystem.core.exceptions.TimeRangeException;
  62 import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval;
  63 import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue;
  64 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  65 import org.eclipse.tracecompass.tmf.core.signal.TmfSelectionRangeUpdatedSignal;
  66 import org.eclipse.tracecompass.tmf.core.signal.TmfSignalHandler;
  67 import org.eclipse.tracecompass.tmf.core.signal.TmfSignalManager;
  68 import org.eclipse.tracecompass.tmf.core.signal.TmfTraceSelectedSignal;
  69 import org.eclipse.tracecompass.tmf.core.statesystem.TmfStateSystemAnalysisModule;
  70 import org.eclipse.tracecompass.tmf.core.timestamp.TmfTimestamp;
  71 import org.eclipse.tracecompass.tmf.core.trace.ITmfContext;
  72 import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
  73 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceManager;
  74 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  75 import org.eclipse.tracecompass.tmf.core.util.Pair;
  76 import org.eclipse.tracecompass.tmf.ui.views.timegraph.AbstractStateSystemTimeGraphView;
  77 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.ILinkEvent;
  78 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.ITimeEvent;
  79 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.ITimeGraphEntry;
  80 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.NullTimeEvent;
  81 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.TimeEvent;
  82 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.TimeGraphEntry;
  83 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.TimeLinkEvent;
  84 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.widgets.TimeGraphControl;
  85 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.widgets.Utils;
  86 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.widgets.Utils.Resolution;
  87 import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.widgets.Utils.TimeFormat;
  88
  89 import com.google.common.collect.ImmutableList;
  90
  91 /**
  92  * The Control Flow view main object
  93  *
  94  */
  95 public class ControlFlowView extends AbstractStateSystemTimeGraphView {
  96
  97     // ------------------------------------------------------------------------
  98     // Constants
  99     // ------------------------------------------------------------------------
 100     /**
 101      * View ID.
 102      */
 103     public static final @NonNull String ID = "org.eclipse.tracecompass.analysis.os.linux.views.controlflow"; //$NON-NLS-1$
 104
 105     private static final String ICONS_PATH = "icons/"; //$NON-NLS-1$
 106     private static final String OPTIMIZE_ICON = ICONS_PATH + "elcl16/Optimization.png"; //$NON-NLS-1$
 107
 108     private static final String PROCESS_COLUMN = Messages.ControlFlowView_processColumn;
 109     private static final String TID_COLUMN = Messages.ControlFlowView_tidColumn;
 110     private static final String PTID_COLUMN = Messages.ControlFlowView_ptidColumn;
 111     private static final String BIRTH_TIME_COLUMN = Messages.ControlFlowView_birthTimeColumn;
 112     private static final String INVISIBLE_COLUMN = Messages.ControlFlowView_invisibleColumn;
 113     private Action fOptimizationAction;
 114
 115     private static final String NEXT_EVENT_ICON_PATH = "icons/elcl16/shift_r_edit.gif"; //$NON-NLS-1$
 116     private static final String PREV_EVENT_ICON_PATH = "icons/elcl16/shift_l_edit.gif"; //$NON-NLS-1$
 117
 118     private static final String[] COLUMN_NAMES = new String[] {
 119             PROCESS_COLUMN,
 120             TID_COLUMN,
 121             PTID_COLUMN,
 122             BIRTH_TIME_COLUMN
 123     };
 124
 125     private static final String[] FILTER_COLUMN_NAMES = new String[] {
 126             PROCESS_COLUMN,
 127             TID_COLUMN
 128     };
 129
 130     // Timeout between updates in the build thread in ms
 131     private static final long BUILD_UPDATE_TIMEOUT = 500;
 132
 133     private static final Comparator<ITimeGraphEntry>[] COLUMN_COMPARATORS;
 134
 135     private final Function<Collection<ILinkEvent>, Map<Integer, Long>> UPDATE_SCHEDULING_COLUMN_ALGO = new NaiveOptimizationAlgorithm();
 136
 137     private static final int INITIAL_SORT_COLUMN_INDEX = 3;
 138
 139     static {
 140         ImmutableList.Builder<Comparator<ITimeGraphEntry>> builder = ImmutableList.builder();
 141         builder.add(ControlFlowColumnComparators.PROCESS_NAME_COLUMN_COMPARATOR)
 142             .add(ControlFlowColumnComparators.TID_COLUMN_COMPARATOR)
 143             .add(ControlFlowColumnComparators.PTID_COLUMN_COMPARATOR)
 144             .add(ControlFlowColumnComparators.BIRTH_TIME_COLUMN_COMPARATOR);
 145         List<Comparator<ITimeGraphEntry>> l = builder.build();
 146         COLUMN_COMPARATORS = l.toArray(new Comparator[l.size()]);
 147     }
 148
 149     /**
 150      * Mutex rule for search action jobs, making sure they execute sequentially
 151      */
 152     private final ISchedulingRule fSearchActionMutexRule = new ISchedulingRule() {
 153         @Override
 154         public boolean isConflicting(ISchedulingRule rule) {
 155             return (rule == this);
 156         }
 157
 158         @Override
 159         public boolean contains(ISchedulingRule rule) {
 160             return (rule == this);
 161         }
 162     };
 163
 164     private final Set<ITmfTrace> fFlatTraces = new HashSet<>();
 165
 166     private IAction fFlatAction;
 167
 168     private IAction fHierarchicalAction;
 169     private IAction fPreviousEventAction;
 170     private IAction fNextEventAction;
 171
 172     // ------------------------------------------------------------------------
 173     // Constructors
 174     // ------------------------------------------------------------------------
 175
 176     /**
 177      * Constructor
 178      */
 179     public ControlFlowView() {
 180         super(ID, new ControlFlowPresentationProvider());
 181         setTreeColumns(COLUMN_NAMES, COLUMN_COMPARATORS, INITIAL_SORT_COLUMN_INDEX);
 182         setTreeLabelProvider(new ControlFlowTreeLabelProvider());
 183         setFilterColumns(FILTER_COLUMN_NAMES);
 184         setFilterLabelProvider(new ControlFlowFilterLabelProvider());
 185         setEntryComparator(ControlFlowColumnComparators.BIRTH_TIME_COLUMN_COMPARATOR);
 186     }
 187
 188     @Override
 189     public void createPartControl(Composite parent) {
 190         super.createPartControl(parent);
 191         // add "Check active" Button to TimeGraphFilterDialog
 192         super.getTimeGraphCombo().addTimeGraphFilterCheckActiveButton(
 193                 new ControlFlowCheckActiveProvider(Messages.ControlFlowView_checkActiveLabel, Messages.ControlFlowView_checkActiveToolTip));
 194         // add "Uncheck inactive" Button to TimeGraphFilterDialog
 195         super.getTimeGraphCombo().addTimeGraphFilterUncheckInactiveButton(
 196                 new ControlFlowCheckActiveProvider(Messages.ControlFlowView_uncheckInactiveLabel, Messages.ControlFlowView_uncheckInactiveToolTip));
 197     }
 198
 199     /**
 200      * @since 2.0
 201      */
 202     @Override
 203     protected void fillTimeGraphEntryContextMenu(@NonNull IMenuManager menuManager) {
 204         ISelection selection = getSite().getSelectionProvider().getSelection();
 205         if (selection instanceof StructuredSelection) {
 206             StructuredSelection sSel = (StructuredSelection) selection;
 207             if (sSel.getFirstElement() instanceof ControlFlowEntry) {
 208                 ControlFlowEntry entry = (ControlFlowEntry) sSel.getFirstElement();
 209                 menuManager.add(new FollowThreadAction(ControlFlowView.this, entry.getName(), entry.getThreadId(), entry.getTrace()));
 210             }
 211         }
 212     }
 213
 214     @Override
 215     protected void fillLocalToolBar(IToolBarManager manager) {
 216         // add "Optimization" Button to local tool bar of Controlflow
 217         IAction optimizationAction = getOptimizationAction();
 218         manager.add(optimizationAction);
 219
 220         // add a separator to local tool bar
 221         manager.add(new Separator());
 222
 223         super.fillLocalToolBar(manager);
 224         IDialogSettings settings = Activator.getDefault().getDialogSettings();
 225         IDialogSettings section = settings.getSection(getClass().getName());
 226         if (section == null) {
 227             section = settings.addNewSection(getClass().getName());
 228         }
 229
 230         IAction hideArrowsAction = getTimeGraphCombo().getTimeGraphViewer().getHideArrowsAction(section);
 231         manager.add(hideArrowsAction);
 232
 233         IAction followArrowBwdAction = getTimeGraphCombo().getTimeGraphViewer().getFollowArrowBwdAction();
 234         followArrowBwdAction.setText(Messages.ControlFlowView_followCPUBwdText);
 235         followArrowBwdAction.setToolTipText(Messages.ControlFlowView_followCPUBwdText);
 236         manager.add(followArrowBwdAction);
 237
 238         IAction followArrowFwdAction = getTimeGraphCombo().getTimeGraphViewer().getFollowArrowFwdAction();
 239         followArrowFwdAction.setText(Messages.ControlFlowView_followCPUFwdText);
 240         followArrowFwdAction.setToolTipText(Messages.ControlFlowView_followCPUFwdText);
 241         manager.add(followArrowFwdAction);
 242
 243         fPreviousEventAction = new SearchEventAction(false, PackageMessages.ControlFlowView_PreviousEventJobName);
 244         fPreviousEventAction.setText(PackageMessages.ControlFlowView_PreviousEventActionName);
 245         fPreviousEventAction.setToolTipText(PackageMessages.ControlFlowView_PreviousEventActionTooltip);
 246         fPreviousEventAction.setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(PREV_EVENT_ICON_PATH));
 247         manager.add(fPreviousEventAction);
 248
 249         fNextEventAction = new SearchEventAction(true, PackageMessages.ControlFlowView_NextEventJobName);
 250         fNextEventAction.setText(PackageMessages.ControlFlowView_NextEventActionName);
 251         fNextEventAction.setToolTipText(PackageMessages.ControlFlowView_NextEventActionTooltip);
 252         fNextEventAction.setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(NEXT_EVENT_ICON_PATH));
 253         manager.add(fNextEventAction);
 254     }
 255
 256     private IAction getOptimizationAction() {
 257         if (fOptimizationAction == null) {
 258             fOptimizationAction = new OptimizationAction();
 259             fOptimizationAction.setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(OPTIMIZE_ICON));
 260             fOptimizationAction.setText(Messages.ControlFlowView_optimizeLabel);
 261             fOptimizationAction.setToolTipText(Messages.ControlFlowView_optimizeToolTip);
 262         }
 263         return fOptimizationAction;
 264     }
 265
 266     @Override
 267     protected void fillLocalMenu(IMenuManager manager) {
 268         super.fillLocalMenu(manager);
 269         final MenuManager item = new MenuManager(Messages.ControlFlowView_threadPresentation);
 270         fFlatAction = createFlatAction();
 271         item.add(fFlatAction);
 272
 273         fHierarchicalAction = createHierarchicalAction();
 274         item.add(fHierarchicalAction);
 275         manager.add(item);
 276
 277     }
 278
 279     /**
 280      * Base Action for the "Go to Next/Previous Event for thread" actions
 281      */
 282     private class SearchEventAction extends Action {
 283
 284         private final boolean ifDirection;
 285         private final String ifJobName;
 286
 287         /**
 288          * Constructor
 289          *
 290          * @param direction
 291          *            The direction of the search, "true" for forwards and
 292          *            "false" for backwards.
 293          * @param jobName
 294          *            The name of the job that will be spawned
 295          */
 296         public SearchEventAction(boolean direction, String jobName) {
 297             ifDirection = direction;
 298             ifJobName = jobName;
 299         }
 300
 301         @Override
 302         public void run() {
 303             Job job = new Job(ifJobName) {
 304                 @Override
 305                 protected IStatus run(IProgressMonitor monitor) {
 306                     TimeGraphControl ctrl = getTimeGraphViewer().getTimeGraphControl();
 307                     ITimeGraphEntry traceEntry = ctrl.getSelectedTrace();
 308
 309                     long ts = getTimeGraphViewer().getSelectionBegin();
 310                     ITimeEvent selectedState = Utils.findEvent(traceEntry, ts, 0);
 311
 312                     if (selectedState == null) {
 313                         /* No selection currently in the view, do nothing */
 314                         return Status.OK_STATUS;
 315                     }
 316                     ITimeGraphEntry entry = selectedState.getEntry();
 317                     if (!(entry instanceof ControlFlowEntry)) {
 318                         return Status.OK_STATUS;
 319                     }
 320                     ControlFlowEntry cfEntry = (ControlFlowEntry) entry;
 321                     int tid = cfEntry.getThreadId();
 322
 323                     ITmfTrace trace = cfEntry.getTrace();
 324                     ITmfContext ctx = trace.seekEvent(TmfTimestamp.fromNanos(ts));
 325                     long rank = ctx.getRank();
 326                     ctx.dispose();
 327
 328                     Predicate<@NonNull ITmfEvent> predicate = event -> {
 329                         /*
 330                          * TODO Specific to the Control Flow View and kernel
 331                          * traces for now. Could be eventually generalized to
 332                          * anything represented by the time graph row.
 333                          */
 334                         Integer eventTid = KernelTidAspect.INSTANCE.resolve(event);
 335                         return (eventTid != null && eventTid.intValue() == tid);
 336                     };
 337
 338                     ITmfEvent event = (ifDirection ?
 339                             TmfTraceUtils.getNextEventMatching(cfEntry.getTrace(), rank, predicate, monitor) :
 340                             TmfTraceUtils.getPreviousEventMatching(cfEntry.getTrace(), rank, predicate, monitor));
 341                     if (event != null) {
 342                         TmfSignalManager.dispatchSignal(new TmfSelectionRangeUpdatedSignal(this, event.getTimestamp()));
 343                     }
 344                     return Status.OK_STATUS;
 345
 346                 }
 347             };
 348             /*
 349              * Make subsequent jobs not run concurrently, but wait after one
 350              * another.
 351              */
 352             job.setRule(fSearchActionMutexRule);
 353             job.schedule();
 354         }
 355     }
 356
 357     private IAction createHierarchicalAction() {
 358         IAction action = new Action(Messages.ControlFlowView_hierarchicalViewLabel, IAction.AS_RADIO_BUTTON) {
 359             @Override
 360             public void run() {
 361                 ITmfTrace parentTrace = getTrace();
 362                 synchronized (fFlatTraces) {
 363                     fFlatTraces.remove(parentTrace);
 364                     for (ITmfTrace trace : TmfTraceManager.getTraceSet(parentTrace)) {
 365                         final ITmfStateSystem ss = TmfStateSystemAnalysisModule.getStateSystem(trace, KernelAnalysisModule.ID);
 366                         for (TimeGraphEntry traceEntry : getEntryList(ss)) {
 367                             List<ControlFlowEntry> currentRootList = traceEntry.getChildren().stream()
 368                                     .filter(e -> e instanceof ControlFlowEntry)
 369                                     .map(e -> (ControlFlowEntry) e)
 370                                     .collect(Collectors.toList());
 371                             addEntriesToHierarchicalTree(currentRootList, traceEntry);
 372                         }
 373                     }
 374                 }
 375                 refresh();
 376             }
 377         };
 378         action.setChecked(true);
 379         action.setToolTipText(Messages.ControlFlowView_hierarchicalViewToolTip);
 380         return action;
 381     }
 382
 383     private IAction createFlatAction() {
 384         IAction action = new Action(Messages.ControlFlowView_flatViewLabel, IAction.AS_RADIO_BUTTON) {
 385             @Override
 386             public void run() {
 387                 ITmfTrace parentTrace = getTrace();
 388                 synchronized (fFlatTraces) {
 389                     fFlatTraces.add(parentTrace);
 390                     for (ITmfTrace trace : TmfTraceManager.getTraceSet(parentTrace)) {
 391                         final ITmfStateSystem ss = TmfStateSystemAnalysisModule.getStateSystem(trace, KernelAnalysisModule.ID);
 392                         List<@NonNull TimeGraphEntry> entryList = getEntryList(ss);
 393                         if (entryList != null) {
 394                             for (TimeGraphEntry traceEntry : entryList) {
 395                                 hierarchicalToFlatTree(traceEntry);
 396                             }
 397                         }
 398                     }
 399                 }
 400                 refresh();
 401             }
 402         };
 403         action.setToolTipText(Messages.ControlFlowView_flatViewToolTip);
 404         return action;
 405     }
 406
 407     @Override
 408     protected String getNextText() {
 409         return Messages.ControlFlowView_nextProcessActionNameText;
 410     }
 411
 412     @Override
 413     protected String getNextTooltip() {
 414         return Messages.ControlFlowView_nextProcessActionToolTipText;
 415     }
 416
 417     @Override
 418     protected String getPrevText() {
 419         return Messages.ControlFlowView_previousProcessActionNameText;
 420     }
 421
 422     @Override
 423     protected String getPrevTooltip() {
 424         return Messages.ControlFlowView_previousProcessActionToolTipText;
 425     }
 426
 427     /**
 428      * Get the optimization function for the scheduling column. In the base
 429      * implementation, this optimizes by Line arrows, but can be overidden.
 430      * <p>
 431      * It takes a collection of link events, looking at the entries being
 432      * linked, and returns a list of the proposed order. The list of indexes
 433      * should be in ascending order. There can be duplicates, but the values and
 434      * order should always be the same for the same input.
 435      *
 436      * @return the returned column order, where the integer is the tid of the
 437      *         entry, and the return value is the position, there can be
 438      *         duplicates.
 439      */
 440     public Function<Collection<ILinkEvent>, Map<Integer, Long>> getUpdatedSchedulingColumn() {
 441         return UPDATE_SCHEDULING_COLUMN_ALGO;
 442     }
 443
 444     /**
 445      * This is an optimization action used to find cliques of entries due to
 446      * links and put them closer together
 447      *
 448      * @author Samuel Gagnon
 449      */
 450     private final class OptimizationAction extends Action {
 451
 452         @Override
 453         public void runWithEvent(Event event) {
 454             ITmfTrace trace = getTrace();
 455             if (trace == null) {
 456                 return;
 457             }
 458
 459             createFlatAction().run();
 460
 461             /*
 462              * This method only returns the arrows in the current time interval
 463              * [a,b] of ControlFlowView. Thus, we only optimize for that time
 464              * interval
 465              */
 466             List<ILinkEvent> arrows = getTimeGraphViewer().getTimeGraphControl().getArrows();
 467             final ITmfStateSystem ss = TmfStateSystemAnalysisModule.getStateSystem(trace, KernelAnalysisModule.ID);
 468             List<TimeGraphEntry> currentList = getEntryList(ss);
 469
 470             Map<Integer, Long> orderedTidMap = getUpdatedSchedulingColumn().apply(arrows);
 471
 472             /*
 473              * Now that we have our list of ordered tid, it's time to assign a
 474              * position for each threads in the view. For this, we assign a
 475              * value to an invisible column and sort according to the values in
 476              * this column.
 477              */
 478             for (TimeGraphEntry entry : currentList) {
 479                 if (entry instanceof TraceEntry) {
 480                     for (TimeGraphEntry child : ((TraceEntry) entry).getChildren()) {
 481                         if (child instanceof ControlFlowEntry) {
 482                             ControlFlowEntry cEntry = (ControlFlowEntry) child;
 483                             /*
 484                              * If the thread is in our list, we give it a
 485                              * position. Otherwise, it means there's no activity
 486                              * in the current interval for that thread. We set
 487                              * its position to Long.MAX_VALUE so it goes to the
 488                              * bottom.
 489                              */
 490                             cEntry.setSchedulingPosition(orderedTidMap.getOrDefault(cEntry.getThreadId(), Long.MAX_VALUE));
 491                         }
 492                     }
 493                 }
 494             }
 495
 496             setEntryComparator(ControlFlowColumnComparators.SCHEDULING_COLUMN_COMPARATOR);
 497             refresh();
 498         }
 499
 500     }
 501
 502     /**
 503      * @author gbastien
 504      *
 505      */
 506     protected static class ControlFlowTreeLabelProvider extends TreeLabelProvider {
 507
 508         @Override
 509         public String getColumnText(Object element, int columnIndex) {
 510             if (element instanceof TraceEntry) {
 511                 if (columnIndex == 0) {
 512                     return ((TraceEntry) element).getName();
 513                 }
 514                 return ""; //$NON-NLS-1$
 515             }
 516             ControlFlowEntry entry = (ControlFlowEntry) element;
 517
 518             if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_processColumn)) {
 519                 return entry.getName();
 520             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_tidColumn)) {
 521                 return Integer.toString(entry.getThreadId());
 522             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_ptidColumn)) {
 523                 if (entry.getParentThreadId() > 0) {
 524                     return Integer.toString(entry.getParentThreadId());
 525                 }
 526             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_birthTimeColumn)) {
 527                 return Utils.formatTime(entry.getStartTime(), TimeFormat.CALENDAR, Resolution.NANOSEC);
 528             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_traceColumn)) {
 529                 return entry.getTrace().getName();
 530             } else if (COLUMN_NAMES[columnIndex].equals(INVISIBLE_COLUMN)) {
 531                 return Long.toString(entry.getSchedulingPosition());
 532             }
 533             return ""; //$NON-NLS-1$
 534         }
 535
 536     }
 537
 538     private static class ControlFlowFilterLabelProvider extends TreeLabelProvider {
 539
 540         @Override
 541         public String getColumnText(Object element, int columnIndex) {
 542             if (element instanceof TraceEntry) {
 543                 if (columnIndex == 0) {
 544                     return ((TraceEntry) element).getName();
 545                 }
 546                 return ""; //$NON-NLS-1$
 547             }
 548             ControlFlowEntry entry = (ControlFlowEntry) element;
 549
 550             if (columnIndex == 0) {
 551                 return entry.getName();
 552             } else if (columnIndex == 1) {
 553                 return Integer.toString(entry.getThreadId());
 554             }
 555             return ""; //$NON-NLS-1$
 556         }
 557
 558     }
 559
 560     private static class TraceEntry extends TimeGraphEntry {
 561
 562         public TraceEntry(String name, long startTime, long endTime) {
 563             super(name, startTime, endTime);
 564         }
 565
 566         @Override
 567         public boolean hasTimeEvents() {
 568             return false;
 569         }
 570     }
 571
 572     @TmfSignalHandler
 573     @Override
 574     public void traceClosed(org.eclipse.tracecompass.tmf.core.signal.TmfTraceClosedSignal signal) {
 575         super.traceClosed(signal);
 576         synchronized (fFlatTraces) {
 577             fFlatTraces.remove(signal.getTrace());
 578         }
 579     }
 580
 581     @TmfSignalHandler
 582     @Override
 583     public void traceSelected(TmfTraceSelectedSignal signal) {
 584         super.traceSelected(signal);
 585         synchronized (fFlatTraces) {
 586             if (fFlatTraces.contains(signal.getTrace())) {
 587                 fHierarchicalAction.setChecked(false);
 588                 fFlatAction.setChecked(true);
 589             } else {
 590                 fFlatAction.setChecked(false);
 591                 fHierarchicalAction.setChecked(true);
 592             }
 593         }
 594     }
 595
 596     // ------------------------------------------------------------------------
 597     // Internal
 598     // ------------------------------------------------------------------------
 599
 600     @Override
 601     protected void buildEntryList(final ITmfTrace trace, final ITmfTrace parentTrace, final IProgressMonitor monitor) {
 602         final ITmfStateSystem ssq = TmfStateSystemAnalysisModule.getStateSystem(trace, KernelAnalysisModule.ID);
 603         if (ssq == null) {
 604             return;
 605         }
 606
 607         final List<ControlFlowEntry> entryList = new ArrayList<>();
 608         /** Map of trace entries */
 609         Map<ITmfTrace, TraceEntry> traceEntryMap = new HashMap<>();
 610         /** Map of control flow entries, key is a pair [threadId, cpuId] */
 611         final Map<Pair<Integer, Integer>, ControlFlowEntry> entryMap = new HashMap<>();
 612
 613         long start = ssq.getStartTime();
 614         setStartTime(Math.min(getStartTime(), start));
 615
 616         boolean complete = false;
 617         while (!complete) {
 618             if (monitor.isCanceled()) {
 619                 return;
 620             }
 621             complete = ssq.waitUntilBuilt(BUILD_UPDATE_TIMEOUT);
 622             if (ssq.isCancelled()) {
 623                 return;
 624             }
 625             long end = ssq.getCurrentEndTime();
 626             if (start == end && !complete) { // when complete execute one last time regardless of end time
 627                 continue;
 628             }
 629
 630             TraceEntry aTraceEntry = traceEntryMap.get(trace);
 631             if (aTraceEntry == null) {
 632                 aTraceEntry = new TraceEntry(trace.getName(), start, end + 1);
 633                 traceEntryMap.put(trace, aTraceEntry);
 634                 addToEntryList(parentTrace, ssq, Collections.singletonList(aTraceEntry));
 635             } else {
 636                 aTraceEntry.updateEndTime(end + 1);
 637             }
 638             final TraceEntry traceEntry = aTraceEntry;
 639
 640             final long resolution = Math.max(1, (end - ssq.getStartTime()) / getDisplayWidth());
 641             setEndTime(Math.max(getEndTime(), end + 1));
 642             final List<Integer> threadQuarks = ssq.getQuarks(Attributes.THREADS, "*"); //$NON-NLS-1$
 643             queryFullStates(ssq, start, end, resolution, monitor, new IQueryHandler() {
 644                 @Override
 645                 public void handle(List<List<ITmfStateInterval>> fullStates, List<ITmfStateInterval> prevFullState) {
 646                     for (int threadQuark : threadQuarks) {
 647                         String threadAttributeName = ssq.getAttributeName(threadQuark);
 648
 649                         Pair<Integer, Integer> entryKey = Attributes.parseThreadAttributeName(threadAttributeName);
 650                         int threadId = entryKey.getFirst();
 651
 652                         if (threadId < 0) { // ignore the 'unknown' (-1) thread
 653                             continue;
 654                         }
 655
 656                         int execNameQuark = ssq.optQuarkRelative(threadQuark, Attributes.EXEC_NAME);
 657                         int ppidQuark = ssq.optQuarkRelative(threadQuark, Attributes.PPID);
 658                         if (execNameQuark == ITmfStateSystem.INVALID_ATTRIBUTE) {
 659                             /* No information on this thread (yet?), skip it for now */
 660                             continue;
 661                         }
 662                         ITmfStateInterval lastExecNameInterval = prevFullState == null || execNameQuark >= prevFullState.size() ? null : prevFullState.get(execNameQuark);
 663                         long lastExecNameStartTime = lastExecNameInterval == null ? -1 : lastExecNameInterval.getStartTime();
 664                         long lastExecNameEndTime = lastExecNameInterval == null ? -1 : lastExecNameInterval.getEndTime() + 1;
 665                         long lastPpidStartTime = prevFullState == null || ppidQuark >= prevFullState.size() || ppidQuark == ITmfStateSystem.INVALID_ATTRIBUTE ? -1 : prevFullState.get(ppidQuark).getStartTime();
 666                         for (List<ITmfStateInterval> fullState : fullStates) {
 667                             if (monitor.isCanceled()) {
 668                                 return;
 669                             }
 670                             if (execNameQuark >= fullState.size() || ppidQuark >= fullState.size()) {
 671                                 /* No information on this thread (yet?), skip it for now */
 672                                 continue;
 673                             }
 674                             ITmfStateInterval execNameInterval = fullState.get(execNameQuark);
 675                             ITmfStateInterval ppidInterval = ppidQuark == ITmfStateSystem.INVALID_ATTRIBUTE ? null : fullState.get(ppidQuark);
 676                             long startTime = execNameInterval.getStartTime();
 677                             long endTime = execNameInterval.getEndTime() + 1;
 678                             if (startTime == lastExecNameStartTime && ppidInterval != null && ppidInterval.getStartTime() == lastPpidStartTime) {
 679                                 continue;
 680                             }
 681                             boolean isNull = execNameInterval.getStateValue().isNull();
 682                             if (isNull && lastExecNameEndTime < startTime && lastExecNameEndTime != -1) {
 683                                 /*
 684                                  * There was a non-null interval in between the
 685                                  * full states, try to use it.
 686                                  */
 687                                 try {
 688                                     execNameInterval = ssq.querySingleState(startTime - 1, execNameQuark);
 689                                     ppidInterval = ppidQuark == ITmfStateSystem.INVALID_ATTRIBUTE ? null : ssq.querySingleState(startTime - 1, ppidQuark);
 690                                     startTime = execNameInterval.getStartTime();
 691                                     endTime = execNameInterval.getEndTime() + 1;
 692                                 } catch (StateSystemDisposedException e) {
 693                                     /* ignored */
 694                                 }
 695                             }
 696                             if (!execNameInterval.getStateValue().isNull() &&
 697                                     execNameInterval.getStateValue().getType() == ITmfStateValue.Type.STRING) {
 698                                 String execName = execNameInterval.getStateValue().unboxStr();
 699                                 int ppid = ppidInterval == null ? -1 : ppidInterval.getStateValue().unboxInt();
 700                                 ControlFlowEntry entry = entryMap.get(entryKey);
 701                                 if (entry == null) {
 702                                     entry = new ControlFlowEntry(threadQuark, trace, execName, threadId, ppid, startTime, endTime);
 703                                     entryList.add(entry);
 704                                     entryMap.put(entryKey, entry);
 705                                 } else {
 706                                     /*
 707                                      * Update the name of the entry to the
 708                                      * latest execName and the parent thread id
 709                                      * to the latest ppid.
 710                                      */
 711                                     entry.setName(execName);
 712                                     entry.setParentThreadId(ppid);
 713                                     entry.updateEndTime(endTime);
 714                                 }
 715                             }
 716                             if (isNull) {
 717                                 entryMap.remove(entryKey);
 718                             }
 719                             lastExecNameStartTime = startTime;
 720                             lastExecNameEndTime = endTime;
 721                             lastPpidStartTime = ppidInterval == null ? -1 : ppidInterval.getStartTime();
 722                         }
 723                     }
 724                     synchronized (fFlatTraces) {
 725                         if (fFlatTraces.contains(parentTrace)) {
 726                             addEntriesToFlatTree(entryList, traceEntry);
 727                         } else {
 728                             addEntriesToHierarchicalTree(entryList, traceEntry);
 729                         }
 730                     }
 731                 }
 732             });
 733
 734             queryFullStates(ssq, ssq.getStartTime(), end, resolution, monitor, new IQueryHandler() {
 735                 @Override
 736                 public void handle(@NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState) {
 737                     for (final TimeGraphEntry entry : traceEntry.getChildren()) {
 738                         if (monitor.isCanceled()) {
 739                             return;
 740                         }
 741                         buildStatusEvents(trace, parentTrace, ssq, fullStates, prevFullState, (ControlFlowEntry) entry, monitor, ssq.getStartTime(), end);
 742                     }
 743                 }
 744             });
 745
 746             if (parentTrace.equals(getTrace())) {
 747                 refresh();
 748             }
 749
 750             start = end;
 751         }
 752     }
 753
 754     /**
 755      * Add entries to the traces's child list in a flat fashion (no hierarchy).
 756      * If one entry has children, we do a depth first search to add each child
 757      * to the trace's child list and update the parent and child relations.
 758      */
 759     private static void hierarchicalToFlatTree(TimeGraphEntry traceEntry) {
 760         List<@NonNull TimeGraphEntry> rootList = traceEntry.getChildren();
 761         // We visit the children of every entry to add
 762         StreamFlattener<TimeGraphEntry> sf = new StreamFlattener<>(entry -> entry.getChildren().stream());
 763         Stream<TimeGraphEntry> allEntries = rootList.stream().flatMap(entry -> sf.flatten(entry));
 764
 765         // We add every entry that is missing from the trace's entry list
 766         List<@NonNull TimeGraphEntry> rootListToAdd = allEntries
 767                 .filter(entry -> !rootList.contains(entry))
 768                 .collect(Collectors.toList());
 769         rootList.forEach(entry -> {
 770             entry.clearChildren();
 771         });
 772         rootListToAdd.forEach(entry -> {
 773             traceEntry.addChild(entry);
 774             entry.clearChildren();
 775         });
 776     }
 777
 778     /**
 779      * Add entries to the traces's child list in a flat fashion (no hierarchy).
 780      */
 781     private static void addEntriesToFlatTree(List<@NonNull ControlFlowEntry> entryList, TimeGraphEntry traceEntry) {
 782         List<TimeGraphEntry> rootList = traceEntry.getChildren();
 783         for (ControlFlowEntry entry : entryList) {
 784             if (!rootList.contains(entry)) {
 785                 traceEntry.addChild(entry);
 786             }
 787         }
 788     }
 789
 790     /**
 791      * Add entries to the trace's child list in a hierarchical fashion.
 792      */
 793     private static void addEntriesToHierarchicalTree(List<ControlFlowEntry> entryList, TimeGraphEntry traceEntry) {
 794         List<TimeGraphEntry> rootList = traceEntry.getChildren();
 795
 796         for (ControlFlowEntry entry : entryList) {
 797             boolean root = (entry.getParent() == null || entry.getParent() == traceEntry);
 798             if (root && entry.getParentThreadId() > 0) {
 799                 for (ControlFlowEntry parent : entryList) {
 800                     /*
 801                      * Associate the parent entry only if their time overlap. A
 802                      * child entry may start before its parent, for example at
 803                      * the beginning of the trace if a parent has not yet
 804                      * appeared in the state system. We just want to make sure
 805                      * that the entry didn't start after the parent ended or
 806                      * ended before the parent started.
 807                      */
 808                     if (parent.getThreadId() == entry.getParentThreadId() &&
 809                             !(entry.getStartTime() > parent.getEndTime() ||
 810                             entry.getEndTime() < parent.getStartTime())) {
 811                         root = false;
 812                         if (rootList.contains(entry)) {
 813                             traceEntry.removeChild(entry);
 814                         }
 815                         parent.addChild(entry);
 816                         break;
 817                     }
 818                 }
 819             }
 820             if (root && (!rootList.contains(entry))) {
 821                 traceEntry.addChild(entry);
 822             }
 823         }
 824     }
 825
 826     private void buildStatusEvents(ITmfTrace trace, ITmfTrace parentTrace, ITmfStateSystem ss, @NonNull List<List<ITmfStateInterval>> fullStates,
 827             @Nullable List<ITmfStateInterval> prevFullState, ControlFlowEntry entry, @NonNull IProgressMonitor monitor, long start, long end) {
 828         if (start < entry.getEndTime() && end > entry.getStartTime()) {
 829             List<ITimeEvent> eventList = getEventList(entry, ss, fullStates, prevFullState, monitor);
 830             if (eventList == null) {
 831                 return;
 832             }
 833             /* Start a new event list on first iteration, then append to it */
 834             if (prevFullState == null) {
 835                 entry.setEventList(eventList);
 836             } else {
 837                 for (ITimeEvent event : eventList) {
 838                     entry.addEvent(event);
 839                 }
 840             }
 841             if (parentTrace.equals(getTrace())) {
 842                 redraw();
 843             }
 844         }
 845         for (ITimeGraphEntry child : entry.getChildren()) {
 846             if (monitor.isCanceled()) {
 847                 return;
 848             }
 849             buildStatusEvents(trace, parentTrace, ss, fullStates, prevFullState, (ControlFlowEntry) child, monitor, start, end);
 850         }
 851     }
 852
 853     @Override
 854     protected @Nullable List<ITimeEvent> getEventList(@NonNull TimeGraphEntry tgentry, ITmfStateSystem ss,
 855             @NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState, @NonNull IProgressMonitor monitor) {
 856         List<ITimeEvent> eventList = null;
 857         if (!(tgentry instanceof ControlFlowEntry)) {
 858             return eventList;
 859         }
 860         ControlFlowEntry entry = (ControlFlowEntry) tgentry;
 861         try {
 862             int statusQuark = entry.getThreadQuark();
 863             eventList = new ArrayList<>(fullStates.size());
 864             ITmfStateInterval lastInterval = prevFullState == null || statusQuark >= prevFullState.size() ? null : prevFullState.get(statusQuark);
 865             long lastStartTime = lastInterval == null ? -1 : lastInterval.getStartTime();
 866             long lastEndTime = lastInterval == null ? -1 : lastInterval.getEndTime() + 1;
 867             for (List<ITmfStateInterval> fullState : fullStates) {
 868                 if (monitor.isCanceled()) {
 869                     return null;
 870                 }
 871                 if (statusQuark >= fullState.size()) {
 872                     /* No information on this thread (yet?), skip it for now */
 873                     continue;
 874                 }
 875                 ITmfStateInterval statusInterval = fullState.get(statusQuark);
 876                 long time = statusInterval.getStartTime();
 877                 if (time == lastStartTime) {
 878                     continue;
 879                 }
 880                 long duration = statusInterval.getEndTime() - time + 1;
 881                 int status = -1;
 882                 try {
 883                     status = statusInterval.getStateValue().unboxInt();
 884                 } catch (StateValueTypeException e) {
 885                     Activator.getDefault().logError(e.getMessage());
 886                 }
 887                 if (lastEndTime != time && lastEndTime != -1) {
 888                     eventList.add(new TimeEvent(entry, lastEndTime, time - lastEndTime));
 889                 }
 890                 if (!statusInterval.getStateValue().isNull()) {
 891                     eventList.add(new TimeEvent(entry, time, duration, status));
 892                 } else {
 893                     eventList.add(new NullTimeEvent(entry, time, duration));
 894                 }
 895                 lastStartTime = time;
 896                 lastEndTime = time + duration;
 897             }
 898         } catch (TimeRangeException e) {
 899             Activator.getDefault().logError(e.getMessage());
 900         }
 901         return eventList;
 902     }
 903
 904     /**
 905      * Returns a value corresponding to the selected entry.
 906      *
 907      * Used in conjunction with synchingToTime to change the selected entry. If
 908      * one of these methods is overridden in child class, then both should be.
 909      *
 910      * @param time
 911      *            The currently selected time
 912      * @return a value identifying the entry
 913      */
 914     private int getSelectionValue(long time) {
 915         int thread = -1;
 916         for (ITmfTrace trace : TmfTraceManager.getTraceSet(getTrace())) {
 917             if (thread > 0) {
 918                 break;
 919             }
 920             ITmfStateSystem ssq = TmfStateSystemAnalysisModule.getStateSystem(trace, KernelAnalysisModule.ID);
 921             if (ssq == null) {
 922                 continue;
 923             }
 924             if (time >= ssq.getStartTime() && time <= ssq.getCurrentEndTime()) {
 925                 List<Integer> currentThreadQuarks = ssq.getQuarks(Attributes.CPUS, "*", Attributes.CURRENT_THREAD); //$NON-NLS-1$
 926                 for (int currentThreadQuark : currentThreadQuarks) {
 927                     try {
 928                         ITmfStateInterval currentThreadInterval = ssq.querySingleState(time, currentThreadQuark);
 929                         int currentThread = currentThreadInterval.getStateValue().unboxInt();
 930                         if (currentThread > 0) {
 931                             int statusQuark = ssq.getQuarkAbsolute(Attributes.THREADS, Integer.toString(currentThread));
 932                             ITmfStateInterval statusInterval = ssq.querySingleState(time, statusQuark);
 933                             if (statusInterval.getStartTime() == time) {
 934                                 thread = currentThread;
 935                                 break;
 936                             }
 937                         }
 938                     } catch (AttributeNotFoundException | TimeRangeException | StateValueTypeException e) {
 939                         Activator.getDefault().logError(e.getMessage());
 940                     } catch (StateSystemDisposedException e) {
 941                         /* Ignored */
 942                     }
 943                 }
 944             }
 945         }
 946         return thread;
 947     }
 948
 949     @Override
 950     protected void synchingToTime(long time) {
 951         int selected = getSelectionValue(time);
 952         if (selected > 0) {
 953             for (Object element : getTimeGraphViewer().getExpandedElements()) {
 954                 if (element instanceof ControlFlowEntry) {
 955                     ControlFlowEntry entry = (ControlFlowEntry) element;
 956                     if (entry.getThreadId() == selected) {
 957                         getTimeGraphCombo().setSelection(entry);
 958                         break;
 959                     }
 960                 }
 961             }
 962         }
 963     }
 964
 965     @Override
 966     protected @NonNull List<ILinkEvent> getLinkList(ITmfStateSystem ss,
 967             @NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState, @NonNull IProgressMonitor monitor) {
 968         List<ILinkEvent> list = new ArrayList<>();
 969         List<TimeGraphEntry> entryList = getEntryList(ss);
 970         if (entryList == null) {
 971             return list;
 972         }
 973         for (ITmfTrace trace : TmfTraceManager.getTraceSet(getTrace())) {
 974             List<Integer> currentThreadQuarks = ss.getQuarks(Attributes.CPUS, "*", Attributes.CURRENT_THREAD); //$NON-NLS-1$
 975             for (int currentThreadQuark : currentThreadQuarks) {
 976                 if (currentThreadQuark >= fullStates.get(0).size()) {
 977                     /* No information on this cpu (yet?), skip it for now */
 978                     continue;
 979                 }
 980                 List<ITmfStateInterval> currentThreadIntervals = new ArrayList<>(fullStates.size() + 2);
 981                 try {
 982                     /*
 983                      * Add the previous interval if it is the first query
 984                      * iteration and the first interval has currentThread=0. Add
 985                      * the following interval if the last interval has
 986                      * currentThread=0. These are diagonal arrows crossing the
 987                      * query iteration range.
 988                      */
 989                     if (prevFullState == null) {
 990                         ITmfStateInterval currentThreadInterval = fullStates.get(0).get(currentThreadQuark);
 991                         if (currentThreadInterval.getStateValue().unboxInt() == 0) {
 992                             long start = Math.max(currentThreadInterval.getStartTime() - 1, ss.getStartTime());
 993                             currentThreadIntervals.add(ss.querySingleState(start, currentThreadQuark));
 994                         }
 995                     }
 996                     for (List<ITmfStateInterval> fullState : fullStates) {
 997                         currentThreadIntervals.add(fullState.get(currentThreadQuark));
 998                     }
 999                     ITmfStateInterval currentThreadInterval = fullStates.get(fullStates.size() - 1).get(currentThreadQuark);
1000                     if (currentThreadInterval.getStateValue().unboxInt() == 0) {
1001                         long end = Math.min(currentThreadInterval.getEndTime() + 1, ss.getCurrentEndTime());
1002                         currentThreadIntervals.add(ss.querySingleState(end, currentThreadQuark));
1003                     }
1004                 } catch (StateSystemDisposedException e) {
1005                     /* Ignored */
1006                     return list;
1007                 }
1008                 int prevThread = 0;
1009                 long prevEnd = 0;
1010                 long lastEnd = 0;
1011                 for (ITmfStateInterval currentThreadInterval : currentThreadIntervals) {
1012                     if (monitor.isCanceled()) {
1013                         return list;
1014                     }
1015                     if (currentThreadInterval.getEndTime() + 1 == lastEnd) {
1016                         continue;
1017                     }
1018                     long time = currentThreadInterval.getStartTime();
1019                     if (time != lastEnd) {
1020                         // don't create links where there are gaps in intervals due to the resolution
1021                         prevThread = 0;
1022                         prevEnd = 0;
1023                     }
1024                     int thread = currentThreadInterval.getStateValue().unboxInt();
1025                     if (thread > 0 && prevThread > 0) {
1026                         ITimeGraphEntry prevEntry = findEntry(entryList, trace, prevThread);
1027                         ITimeGraphEntry nextEntry = findEntry(entryList, trace, thread);
1028                         list.add(new TimeLinkEvent(prevEntry, nextEntry, prevEnd, time - prevEnd, 0));
1029                     }
1030                     lastEnd = currentThreadInterval.getEndTime() + 1;
1031                     if (thread != 0) {
1032                         prevThread = thread;
1033                         prevEnd = lastEnd;
1034                     }
1035                 }
1036             }
1037         }
1038         return list;
1039     }
1040
1041     private ControlFlowEntry findEntry(List<TimeGraphEntry> entryList, ITmfTrace trace, int threadId) {
1042         for (TimeGraphEntry entry : entryList) {
1043             if (entry instanceof ControlFlowEntry) {
1044                 ControlFlowEntry controlFlowEntry = (ControlFlowEntry) entry;
1045                 if (controlFlowEntry.getThreadId() == threadId && controlFlowEntry.getTrace() == trace) {
1046                     return controlFlowEntry;
1047                 }
1048             }
1049             if (entry.hasChildren()) {
1050                 ControlFlowEntry controlFlowEntry = findEntry(entry.getChildren(), trace, threadId);
1051                 if (controlFlowEntry != null) {
1052                     return controlFlowEntry;
1053                 }
1054             }
1055         }
1056         return null;
1057     }
1058
1059     @Override
1060     protected boolean canBePinned() {
1061         //TODO: actionPin is not defined
1062         return false;
1063     }
1064
1065 }