/*******************************************************************************
* Copyright (c) 2015 École Polytechnique de Montréal
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Geneviève Bastien - Initial API and implementation
*******************************************************************************/
package org.eclipse.tracecompass.analysis.os.linux.core.kernel;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.tracecompass.analysis.os.linux.core.event.aspect.LinuxTidAspect;
import org.eclipse.tracecompass.analysis.os.linux.core.tid.TidAnalysisModule;
import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
/**
* This aspect finds the ID of the thread running from this event using the
* {@link KernelAnalysisModule}.
*
* @author Geneviève Bastien
* @since 2.0
*/
public final class KernelTidAspect extends LinuxTidAspect {
/** The singleton instance */
public static final KernelTidAspect INSTANCE = new KernelTidAspect();
private static final IProgressMonitor NULL_MONITOR = new NullProgressMonitor();
private KernelTidAspect() {
}
@Override
public @Nullable Integer resolve(ITmfEvent event) {
try {
return resolve(event, false, NULL_MONITOR);
} catch (InterruptedException e) {
/* Should not happen since there is nothing to interrupt */
return null;
}
}
@Override
public @Nullable Integer resolve(@NonNull ITmfEvent event, boolean block, final IProgressMonitor monitor) throws InterruptedException {
/* Find the CPU this event is run on */
Integer cpu = TmfTraceUtils.resolveIntEventAspectOfClassForEvent(event.getTrace(),
TmfCpuAspect.class, event);
if (cpu == null) {
return null;
}
/* Find the analysis module for the trace */
TidAnalysisModule analysis = TmfTraceUtils.getAnalysisModuleOfClass(event.getTrace(),
TidAnalysisModule.class, TidAnalysisModule.ID);
if (analysis == null) {
return null;
}
long ts = event.getTimestamp().toNanos();
while (block && !analysis.isQueryable(ts) && !monitor.isCanceled()) {
Thread.sleep(100);
}
return analysis.getThreadOnCpuAtTime(cpu, ts);
}
}