analysis/org.eclipse.tracecompass.analysis.os.linux.core/src/org/eclipse/tracecompass/analysis/os/linux/core/kernel/KernelTidAspect.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015 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  *   Geneviève Bastien - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.analysis.os.linux.core.kernel;
  14
  15 import org.eclipse.jdt.annotation.Nullable;
  16 import org.eclipse.tracecompass.analysis.os.linux.core.event.aspect.LinuxTidAspect;
  17 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  18 import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
  19 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  20
  21 /**
  22  * This aspect finds the ID of the thread running from this event using the
  23  * {@link KernelAnalysisModule}.
  24  *
  25  * @author Geneviève Bastien
  26  * @since 2.0
  27  */
  28 public final class KernelTidAspect extends LinuxTidAspect {
  29
  30     /** The singleton instance */
  31     public static final KernelTidAspect INSTANCE = new KernelTidAspect();
  32
  33     private KernelTidAspect() {
  34     }
  35
  36     @Override
  37     public @Nullable Integer resolve(ITmfEvent event) {
  38         /* Find the CPU this event is run on */
  39         Integer cpu = TmfTraceUtils.resolveIntEventAspectOfClassForEvent(event.getTrace(),
  40                 TmfCpuAspect.class, event);
  41         if (cpu == null) {
  42             return null;
  43         }
  44
  45         /* Find the analysis module for the trace */
  46         KernelAnalysisModule analysis = TmfTraceUtils.getAnalysisModuleOfClass(event.getTrace(),
  47                 KernelAnalysisModule.class, KernelAnalysisModule.ID);
  48         if (analysis == null) {
  49             return null;
  50         }
  51         Integer tid = KernelThreadInformationProvider.getThreadOnCpu(
  52                 analysis, cpu, event.getTimestamp().getValue());
  53         if (tid != null) {
  54             return tid;
  55         }
  56         return null;
  57     }
  58
  59 }