org.eclipse.linuxtools.lttng2.kernel.ui/src/org/eclipse/linuxtools/internal/lttng2/kernel/ui/views/controlflow/ControlFlowView.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2013 Ericsson, École Polytechnique de Montréal
   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  *******************************************************************************/
  13
  14 package org.eclipse.linuxtools.internal.lttng2.kernel.ui.views.controlflow;
  15
  16 import java.util.ArrayList;
  17 import java.util.Collections;
  18 import java.util.Comparator;
  19 import java.util.List;
  20
  21 import org.eclipse.core.runtime.IProgressMonitor;
  22 import org.eclipse.jface.action.IAction;
  23 import org.eclipse.jface.action.IToolBarManager;
  24 import org.eclipse.jface.dialogs.IDialogSettings;
  25 import org.eclipse.linuxtools.internal.lttng2.kernel.core.Attributes;
  26 import org.eclipse.linuxtools.internal.lttng2.kernel.ui.Activator;
  27 import org.eclipse.linuxtools.internal.lttng2.kernel.ui.Messages;
  28 import org.eclipse.linuxtools.lttng2.kernel.core.trace.LttngKernelTrace;
  29 import org.eclipse.linuxtools.tmf.core.exceptions.AttributeNotFoundException;
  30 import org.eclipse.linuxtools.tmf.core.exceptions.StateSystemDisposedException;
  31 import org.eclipse.linuxtools.tmf.core.exceptions.StateValueTypeException;
  32 import org.eclipse.linuxtools.tmf.core.exceptions.TimeRangeException;
  33 import org.eclipse.linuxtools.tmf.core.interval.ITmfStateInterval;
  34 import org.eclipse.linuxtools.tmf.core.statesystem.ITmfStateSystem;
  35 import org.eclipse.linuxtools.tmf.core.statevalue.ITmfStateValue;
  36 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  37 import org.eclipse.linuxtools.tmf.core.trace.TmfTraceManager;
  38 import org.eclipse.linuxtools.tmf.ui.views.timegraph.AbstractTimeGraphView;
  39 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.ILinkEvent;
  40 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.ITimeEvent;
  41 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.ITimeGraphEntry;
  42 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.TimeEvent;
  43 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.TimeGraphEntry;
  44 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.TimeLinkEvent;
  45 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.widgets.Utils;
  46 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.widgets.Utils.Resolution;
  47 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.widgets.Utils.TimeFormat;
  48
  49 /**
  50  * The Control Flow view main object
  51  *
  52  */
  53 public class ControlFlowView extends AbstractTimeGraphView {
  54
  55     // ------------------------------------------------------------------------
  56     // Constants
  57     // ------------------------------------------------------------------------
  58
  59     /**
  60      * View ID.
  61      */
  62     public static final String ID = "org.eclipse.linuxtools.lttng2.kernel.ui.views.controlflow"; //$NON-NLS-1$
  63
  64     private static final String PROCESS_COLUMN = Messages.ControlFlowView_processColumn;
  65     private static final String TID_COLUMN = Messages.ControlFlowView_tidColumn;
  66     private static final String PTID_COLUMN = Messages.ControlFlowView_ptidColumn;
  67     private static final String BIRTH_TIME_COLUMN = Messages.ControlFlowView_birthTimeColumn;
  68     private static final String TRACE_COLUMN = Messages.ControlFlowView_traceColumn;
  69
  70     private static final String[] COLUMN_NAMES = new String[] {
  71             PROCESS_COLUMN,
  72             TID_COLUMN,
  73             PTID_COLUMN,
  74             BIRTH_TIME_COLUMN,
  75             TRACE_COLUMN
  76     };
  77
  78     private static final String[] FILTER_COLUMN_NAMES = new String[] {
  79             PROCESS_COLUMN,
  80             TID_COLUMN
  81     };
  82
  83     // ------------------------------------------------------------------------
  84     // Constructors
  85     // ------------------------------------------------------------------------
  86
  87     /**
  88      * Constructor
  89      */
  90     public ControlFlowView() {
  91         super(ID, new ControlFlowPresentationProvider());
  92         setTreeColumns(COLUMN_NAMES);
  93         setTreeLabelProvider(new ControlFlowTreeLabelProvider());
  94         setFilterColumns(FILTER_COLUMN_NAMES);
  95         setEntryComparator(new ControlFlowEntryComparator());
  96     }
  97
  98     @Override
  99     protected void fillLocalToolBar(IToolBarManager manager) {
 100         super.fillLocalToolBar(manager);
 101         IDialogSettings settings = Activator.getDefault().getDialogSettings();
 102         IDialogSettings section = settings.getSection(getClass().getName());
 103         if (section == null) {
 104             section = settings.addNewSection(getClass().getName());
 105         }
 106
 107         IAction hideArrowsAction = getTimeGraphCombo().getTimeGraphViewer().getHideArrowsAction(section);
 108         manager.add(hideArrowsAction);
 109
 110         IAction followArrowBwdAction = getTimeGraphCombo().getTimeGraphViewer().getFollowArrowBwdAction();
 111         followArrowBwdAction.setText(Messages.ControlFlowView_followCPUBwdText);
 112         followArrowBwdAction.setToolTipText(Messages.ControlFlowView_followCPUBwdText);
 113         manager.add(followArrowBwdAction);
 114
 115         IAction followArrowFwdAction = getTimeGraphCombo().getTimeGraphViewer().getFollowArrowFwdAction();
 116         followArrowFwdAction.setText(Messages.ControlFlowView_followCPUFwdText);
 117         followArrowFwdAction.setToolTipText(Messages.ControlFlowView_followCPUFwdText);
 118         manager.add(followArrowFwdAction);
 119     }
 120
 121     @Override
 122     protected String getNextText() {
 123         return Messages.ControlFlowView_nextProcessActionNameText;
 124     }
 125
 126     @Override
 127     protected String getNextTooltip() {
 128         return Messages.ControlFlowView_nextProcessActionToolTipText;
 129     }
 130
 131     @Override
 132     protected String getPrevText() {
 133         return Messages.ControlFlowView_previousProcessActionNameText;
 134     }
 135
 136     @Override
 137     protected String getPrevTooltip() {
 138         return Messages.ControlFlowView_previousProcessActionToolTipText;
 139     }
 140
 141     private static class ControlFlowEntryComparator implements Comparator<ITimeGraphEntry> {
 142
 143         @Override
 144         public int compare(ITimeGraphEntry o1, ITimeGraphEntry o2) {
 145
 146             int result = 0;
 147
 148             if ((o1 instanceof ControlFlowEntry) && (o2 instanceof ControlFlowEntry)) {
 149                 ControlFlowEntry entry1 = (ControlFlowEntry) o1;
 150                 ControlFlowEntry entry2 = (ControlFlowEntry) o2;
 151                 result = entry1.getTrace().getStartTime().compareTo(entry2.getTrace().getStartTime());
 152                 if (result == 0) {
 153                     result = entry1.getTrace().getName().compareTo(entry2.getTrace().getName());
 154                 }
 155                 if (result == 0) {
 156                     result = entry1.getThreadId() < entry2.getThreadId() ? -1 : entry1.getThreadId() > entry2.getThreadId() ? 1 : 0;
 157                 }
 158             }
 159
 160             if (result == 0) {
 161                 result = o1.getStartTime() < o2.getStartTime() ? -1 : o1.getStartTime() > o2.getStartTime() ? 1 : 0;
 162             }
 163
 164             return result;
 165         }
 166     }
 167
 168     /**
 169      * @author gbastien
 170      *
 171      */
 172     protected static class ControlFlowTreeLabelProvider extends TreeLabelProvider {
 173
 174         @Override
 175         public String getColumnText(Object element, int columnIndex) {
 176             ControlFlowEntry entry = (ControlFlowEntry) element;
 177
 178             if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_processColumn)) {
 179                 return entry.getName();
 180             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_tidColumn)) {
 181                 return Integer.toString(entry.getThreadId());
 182             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_ptidColumn)) {
 183                 if (entry.getParentThreadId() > 0) {
 184                     return Integer.toString(entry.getParentThreadId());
 185                 }
 186             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_birthTimeColumn)) {
 187                 return Utils.formatTime(entry.getStartTime(), TimeFormat.CALENDAR, Resolution.NANOSEC);
 188             } else if (COLUMN_NAMES[columnIndex].equals(Messages.ControlFlowView_traceColumn)) {
 189                 return entry.getTrace().getName();
 190             }
 191             return ""; //$NON-NLS-1$
 192         }
 193
 194     }
 195
 196     // ------------------------------------------------------------------------
 197     // Internal
 198     // ------------------------------------------------------------------------
 199
 200     @Override
 201     protected void buildEventList(final ITmfTrace trace, IProgressMonitor monitor) {
 202         setStartTime(Long.MAX_VALUE);
 203         setEndTime(Long.MIN_VALUE);
 204
 205         ArrayList<ControlFlowEntry> rootList = new ArrayList<>();
 206         for (ITmfTrace aTrace : TmfTraceManager.getTraceSet(trace)) {
 207             if (monitor.isCanceled()) {
 208                 return;
 209             }
 210             if (aTrace instanceof LttngKernelTrace) {
 211                 ArrayList<ControlFlowEntry> entryList = new ArrayList<>();
 212                 LttngKernelTrace ctfKernelTrace = (LttngKernelTrace) aTrace;
 213                 ITmfStateSystem ssq = ctfKernelTrace.getStateSystems().get(LttngKernelTrace.STATE_ID);
 214                 if (!ssq.waitUntilBuilt()) {
 215                     return;
 216                 }
 217                 long start = ssq.getStartTime();
 218                 long end = ssq.getCurrentEndTime() + 1;
 219                 setStartTime(Math.min(getStartTime(), start));
 220                 setEndTime(Math.max(getEndTime(), end));
 221                 List<Integer> threadQuarks = ssq.getQuarks(Attributes.THREADS, "*"); //$NON-NLS-1$
 222                 for (int threadQuark : threadQuarks) {
 223                     if (monitor.isCanceled()) {
 224                         return;
 225                     }
 226                     String threadName = ssq.getAttributeName(threadQuark);
 227                     int threadId = -1;
 228                     try {
 229                         threadId = Integer.parseInt(threadName);
 230                     } catch (NumberFormatException e1) {
 231                         continue;
 232                     }
 233                     if (threadId == 0) { // ignore the swapper thread
 234                         continue;
 235                     }
 236                     int execNameQuark = -1;
 237                     try {
 238                         try {
 239                             execNameQuark = ssq.getQuarkRelative(threadQuark, Attributes.EXEC_NAME);
 240                         } catch (AttributeNotFoundException e) {
 241                             continue;
 242                         }
 243                         int ppidQuark = ssq.getQuarkRelative(threadQuark, Attributes.PPID);
 244                         List<ITmfStateInterval> execNameIntervals = ssq.queryHistoryRange(execNameQuark, start, end - 1);
 245                         // use monitor when available in api
 246                         if (monitor.isCanceled()) {
 247                             return;
 248                         }
 249                         ControlFlowEntry entry = null;
 250                         for (ITmfStateInterval execNameInterval : execNameIntervals) {
 251                             if (monitor.isCanceled()) {
 252                                 return;
 253                             }
 254                             if (!execNameInterval.getStateValue().isNull() &&
 255                                     execNameInterval.getStateValue().getType() == ITmfStateValue.Type.STRING) {
 256                                 String execName = execNameInterval.getStateValue().unboxStr();
 257                                 long startTime = execNameInterval.getStartTime();
 258                                 long endTime = execNameInterval.getEndTime() + 1;
 259                                 int ppid = -1;
 260                                 if (ppidQuark != -1) {
 261                                     ITmfStateInterval ppidInterval = ssq.querySingleState(startTime, ppidQuark);
 262                                     ppid = ppidInterval.getStateValue().unboxInt();
 263                                 }
 264                                 if (entry == null) {
 265                                     entry = new ControlFlowEntry(threadQuark, ctfKernelTrace, execName, threadId, ppid, startTime, endTime);
 266                                     entryList.add(entry);
 267                                 } else {
 268                                     // update the name of the entry to the
 269                                     // latest execName
 270                                     entry.setName(execName);
 271                                 }
 272                                 entry.addEvent(new TimeEvent(entry, startTime, endTime - startTime));
 273                             } else {
 274                                 entry = null;
 275                             }
 276                         }
 277                     } catch (AttributeNotFoundException e) {
 278                         e.printStackTrace();
 279                     } catch (TimeRangeException e) {
 280                         e.printStackTrace();
 281                     } catch (StateValueTypeException e) {
 282                         e.printStackTrace();
 283                     } catch (StateSystemDisposedException e) {
 284                         /* Ignored */
 285                     }
 286                 }
 287                 buildTree(entryList, rootList);
 288             }
 289             Collections.sort(rootList, getEntryComparator());
 290             putEntryList(trace, new ArrayList<TimeGraphEntry>(rootList));
 291
 292             if (trace.equals(getTrace())) {
 293                 refresh();
 294             }
 295         }
 296         for (ControlFlowEntry entry : rootList) {
 297             if (monitor.isCanceled()) {
 298                 return;
 299             }
 300             buildStatusEvents(entry.getTrace(), entry, monitor);
 301         }
 302     }
 303
 304     private static void buildTree(ArrayList<ControlFlowEntry> entryList,
 305             ArrayList<ControlFlowEntry> rootList) {
 306         for (ControlFlowEntry entry : entryList) {
 307             boolean root = true;
 308             if (entry.getParentThreadId() > 0) {
 309                 for (ControlFlowEntry parent : entryList) {
 310                     if (parent.getThreadId() == entry.getParentThreadId() &&
 311                             entry.getStartTime() >= parent.getStartTime() &&
 312                             entry.getStartTime() <= parent.getEndTime()) {
 313                         parent.addChild(entry);
 314                         root = false;
 315                         break;
 316                     }
 317                 }
 318             }
 319             if (root) {
 320                 rootList.add(entry);
 321             }
 322         }
 323     }
 324
 325     private void buildStatusEvents(ITmfTrace trace, ControlFlowEntry entry, IProgressMonitor monitor) {
 326         ITmfStateSystem ssq = entry.getTrace().getStateSystems().get(LttngKernelTrace.STATE_ID);
 327
 328         long start = ssq.getStartTime();
 329         long end = ssq.getCurrentEndTime() + 1;
 330         long resolution = Math.max(1, (end - start) / getDisplayWidth());
 331         List<ITimeEvent> eventList = getEventList(entry, entry.getStartTime(), entry.getEndTime(), resolution, monitor);
 332         if (monitor.isCanceled()) {
 333             return;
 334         }
 335         entry.setEventList(eventList);
 336         if (trace.equals(getTrace())) {
 337             redraw();
 338         }
 339         for (ITimeGraphEntry child : entry.getChildren()) {
 340             if (monitor.isCanceled()) {
 341                 return;
 342             }
 343             buildStatusEvents(trace, (ControlFlowEntry) child, monitor);
 344         }
 345     }
 346
 347     @Override
 348     protected List<ITimeEvent> getEventList(TimeGraphEntry tgentry, long startTime, long endTime, long resolution, IProgressMonitor monitor) {
 349         List<ITimeEvent> eventList = null;
 350         if (!(tgentry instanceof ControlFlowEntry)) {
 351             return eventList;
 352         }
 353         ControlFlowEntry entry = (ControlFlowEntry) tgentry;
 354         final long realStart = Math.max(startTime, entry.getStartTime());
 355         final long realEnd = Math.min(endTime, entry.getEndTime());
 356         if (realEnd <= realStart) {
 357             return null;
 358         }
 359         ITmfStateSystem ssq = entry.getTrace().getStateSystems().get(LttngKernelTrace.STATE_ID);
 360         try {
 361             int statusQuark = ssq.getQuarkRelative(entry.getThreadQuark(), Attributes.STATUS);
 362             List<ITmfStateInterval> statusIntervals = ssq.queryHistoryRange(statusQuark, realStart, realEnd - 1, resolution, monitor);
 363             eventList = new ArrayList<>(statusIntervals.size());
 364             long lastEndTime = -1;
 365             for (ITmfStateInterval statusInterval : statusIntervals) {
 366                 if (monitor.isCanceled()) {
 367                     return null;
 368                 }
 369                 long time = statusInterval.getStartTime();
 370                 long duration = statusInterval.getEndTime() - time + 1;
 371                 int status = -1;
 372                 try {
 373                     status = statusInterval.getStateValue().unboxInt();
 374                 } catch (StateValueTypeException e) {
 375                     e.printStackTrace();
 376                 }
 377                 if (lastEndTime != time && lastEndTime != -1) {
 378                     eventList.add(new TimeEvent(entry, lastEndTime, time - lastEndTime));
 379                 }
 380                 eventList.add(new TimeEvent(entry, time, duration, status));
 381                 lastEndTime = time + duration;
 382             }
 383         } catch (AttributeNotFoundException e) {
 384             e.printStackTrace();
 385         } catch (TimeRangeException e) {
 386             e.printStackTrace();
 387         } catch (StateSystemDisposedException e) {
 388             /* Ignored */
 389         }
 390         return eventList;
 391     }
 392
 393     /**
 394      * Returns a value corresponding to the selected entry.
 395      *
 396      * Used in conjunction with selectEntry to change the selected entry. If one
 397      * of these methods is overridden in child class, then both should be.
 398      *
 399      * @param time
 400      *            The currently selected time
 401      * @return a value identifying the entry
 402      */
 403     private int getSelectionValue(long time) {
 404         int thread = -1;
 405         for (ITmfTrace trace : fTraceManager.getActiveTraceSet()) {
 406             if (thread > 0) {
 407                 break;
 408             }
 409             if (trace instanceof LttngKernelTrace) {
 410                 LttngKernelTrace ctfKernelTrace = (LttngKernelTrace) trace;
 411                 ITmfStateSystem ssq = ctfKernelTrace.getStateSystems().get(LttngKernelTrace.STATE_ID);
 412                 if (time >= ssq.getStartTime() && time <= ssq.getCurrentEndTime()) {
 413                     List<Integer> currentThreadQuarks = ssq.getQuarks(Attributes.CPUS, "*", Attributes.CURRENT_THREAD); //$NON-NLS-1$
 414                     for (int currentThreadQuark : currentThreadQuarks) {
 415                         try {
 416                             ITmfStateInterval currentThreadInterval = ssq.querySingleState(time, currentThreadQuark);
 417                             int currentThread = currentThreadInterval.getStateValue().unboxInt();
 418                             if (currentThread > 0) {
 419                                 int statusQuark = ssq.getQuarkAbsolute(Attributes.THREADS, Integer.toString(currentThread), Attributes.STATUS);
 420                                 ITmfStateInterval statusInterval = ssq.querySingleState(time, statusQuark);
 421                                 if (statusInterval.getStartTime() == time) {
 422                                     thread = currentThread;
 423                                     break;
 424                                 }
 425                             }
 426                         } catch (AttributeNotFoundException e) {
 427                             e.printStackTrace();
 428                         } catch (TimeRangeException e) {
 429                             e.printStackTrace();
 430                         } catch (StateValueTypeException e) {
 431                             e.printStackTrace();
 432                         } catch (StateSystemDisposedException e) {
 433                             /* Ignored */
 434                         }
 435                     }
 436                 }
 437             }
 438         }
 439         return thread;
 440     }
 441
 442     @Override
 443     protected void synchingToTime(long time) {
 444         int selected = getSelectionValue(time);
 445         if (selected > 0) {
 446             for (Object element : getTimeGraphViewer().getExpandedElements()) {
 447                 if (element instanceof ControlFlowEntry) {
 448                     ControlFlowEntry entry = (ControlFlowEntry) element;
 449                     if (entry.getThreadId() == selected) {
 450                         getTimeGraphCombo().setSelection(entry);
 451                         break;
 452                     }
 453                 }
 454             }
 455         }
 456     }
 457
 458     @Override
 459     protected List<ILinkEvent> getLinkList(long startTime, long endTime, long resolution, IProgressMonitor monitor) {
 460         List<ILinkEvent> list = new ArrayList<>();
 461         ITmfTrace[] traces = TmfTraceManager.getTraceSet(getTrace());
 462         List<TimeGraphEntry> entryList = getEntryListMap().get(getTrace());
 463         if (traces == null || entryList == null) {
 464             return list;
 465         }
 466         for (ITmfTrace trace : traces) {
 467             if (trace instanceof LttngKernelTrace) {
 468                 ITmfStateSystem ssq = trace.getStateSystems().get(LttngKernelTrace.STATE_ID);
 469                 try {
 470                     long start = Math.max(startTime, ssq.getStartTime());
 471                     long end = Math.min(endTime, ssq.getCurrentEndTime());
 472                     if (end < start) {
 473                         continue;
 474                     }
 475                     List<Integer> currentThreadQuarks = ssq.getQuarks(Attributes.CPUS, "*", Attributes.CURRENT_THREAD); //$NON-NLS-1$
 476                     for (int currentThreadQuark : currentThreadQuarks) {
 477                         // adjust the query range to include the previous and following intervals
 478                         long qstart = Math.max(ssq.querySingleState(start, currentThreadQuark).getStartTime() - 1, ssq.getStartTime());
 479                         long qend = Math.min(ssq.querySingleState(end, currentThreadQuark).getEndTime() + 1, ssq.getCurrentEndTime());
 480                         List<ITmfStateInterval> currentThreadIntervals = ssq.queryHistoryRange(currentThreadQuark, qstart, qend, resolution, monitor);
 481                         int prevThread = 0;
 482                         long prevEnd = 0;
 483                         long lastEnd = 0;
 484                         for (ITmfStateInterval currentThreadInterval : currentThreadIntervals) {
 485                             if (monitor.isCanceled()) {
 486                                 return null;
 487                             }
 488                             long time = currentThreadInterval.getStartTime();
 489                             if (time != lastEnd) {
 490                                 // don't create links where there are gaps in intervals due to the resolution
 491                                 prevThread = 0;
 492                                 prevEnd = 0;
 493                             }
 494                             int thread = currentThreadInterval.getStateValue().unboxInt();
 495                             if (thread > 0 && prevThread > 0) {
 496                                 ITimeGraphEntry prevEntry = findEntry(entryList, trace, prevThread);
 497                                 ITimeGraphEntry nextEntry = findEntry(entryList, trace, thread);
 498                                 list.add(new TimeLinkEvent(prevEntry, nextEntry, prevEnd, time - prevEnd, 0));
 499                             }
 500                             lastEnd = currentThreadInterval.getEndTime() + 1;
 501                             if (thread != 0) {
 502                                 prevThread = thread;
 503                                 prevEnd = lastEnd;
 504                             }
 505                         }
 506                     }
 507                 } catch (TimeRangeException e) {
 508                     e.printStackTrace();
 509                 } catch (AttributeNotFoundException e) {
 510                     e.printStackTrace();
 511                 } catch (StateValueTypeException e) {
 512                     e.printStackTrace();
 513                 } catch (StateSystemDisposedException e) {
 514                     /* Ignored */
 515                 }
 516             }
 517         }
 518         return list;
 519     }
 520
 521     private ControlFlowEntry findEntry(List<TimeGraphEntry> entryList, ITmfTrace trace, int threadId) {
 522         for (TimeGraphEntry entry : entryList) {
 523             if (entry instanceof ControlFlowEntry) {
 524                 ControlFlowEntry controlFlowEntry = (ControlFlowEntry) entry;
 525                 if (controlFlowEntry.getThreadId() == threadId && controlFlowEntry.getTrace() == trace) {
 526                     return controlFlowEntry;
 527                 } else if (entry.hasChildren()) {
 528                     controlFlowEntry = findEntry(entry.getChildren(), trace, threadId);
 529                     if (controlFlowEntry != null) {
 530                         return controlFlowEntry;
 531                     }
 532                 }
 533             }
 534         }
 535         return null;
 536     }
 537 }