lttng/org.eclipse.tracecompass.lttng2.kernel.core/src/org/eclipse/tracecompass/internal/lttng2/kernel/core/analysis/graph/handlers/EventContextHandler.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
  10 package org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.handlers;
  11
  12 import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
  13 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.building.LttngKernelExecGraphProvider;
  14 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.building.LttngKernelExecGraphProvider.Context;
  15 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.model.LttngInterruptContext;
  16 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.model.LttngSystemModel;
  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  * Event Handler to handle the interrupt context stack of the model
  23  *
  24  * @author Francis Giraldeau
  25  * @author Geneviève Bastien
  26  */
  27 public class EventContextHandler extends BaseHandler {
  28
  29     /**
  30      * Constructor
  31      *
  32      * @param provider
  33      *            The parent graph provider
  34      */
  35     public EventContextHandler(LttngKernelExecGraphProvider provider) {
  36         super(provider);
  37     }
  38
  39     @Override
  40     public void handleEvent(ITmfEvent event) {
  41         String eventName = event.getName();
  42         IKernelAnalysisEventLayout eventLayout = getProvider().getEventLayout();
  43         if (eventName.equals(eventLayout.eventSoftIrqEntry())) {
  44             handleSoftirqEntry(event);
  45         } else if (eventName.equals(eventLayout.eventSoftIrqExit())) {
  46             handleSoftirqExit(event);
  47         } else if (eventName.equals(eventLayout.eventHRTimerExpireEntry())) {
  48             handleHrtimerExpireEntry(event);
  49         } else if (eventName.equals(eventLayout.eventHRTimerExpireExit())) {
  50             handleHrtimerExpireExit(event);
  51         } else if (eventName.equals(eventLayout.eventIrqHandlerEntry())) {
  52             handleIrqHandlerEntry(event);
  53         } else if (eventName.equals(eventLayout.eventIrqHandlerExit())) {
  54             handleIrqHandlerExit(event);
  55         }
  56     }
  57
  58     private void pushInterruptContext(ITmfEvent event, Context ctx) {
  59         Object cpuObj = TmfTraceUtils.resolveEventAspectOfClassForEvent(event.getTrace(), TmfCpuAspect.class, event);
  60         if (cpuObj == null) {
  61             throw new NullPointerException();
  62         }
  63         Integer cpu = (Integer) cpuObj;
  64         LttngSystemModel system = getProvider().getSystem();
  65
  66         LttngInterruptContext interruptCtx = new LttngInterruptContext(event, ctx);
  67
  68         system.pushContextStack(event.getTrace().getHostId(), cpu, interruptCtx);
  69     }
  70
  71     private void popInterruptContext(ITmfEvent event, Context ctx) {
  72         Object cpuObj = TmfTraceUtils.resolveEventAspectOfClassForEvent(event.getTrace(), TmfCpuAspect.class, event);
  73         if (cpuObj == null) {
  74             throw new NullPointerException();
  75         }
  76         Integer cpu = (Integer) cpuObj;
  77         LttngSystemModel system = getProvider().getSystem();
  78
  79         /* TODO: add a warning bookmark if the interrupt context is not coherent */
  80         LttngInterruptContext interruptCtx = system.peekContextStack(event.getTrace().getHostId(), cpu);
  81         if (interruptCtx.getContext() == ctx) {
  82             system.popContextStack(event.getTrace().getHostId(), cpu);
  83         }
  84     }
  85
  86     private void handleSoftirqEntry(ITmfEvent event) {
  87         pushInterruptContext(event, Context.SOFTIRQ);
  88     }
  89
  90     private void handleSoftirqExit(ITmfEvent event) {
  91         popInterruptContext(event, Context.SOFTIRQ);
  92     }
  93
  94     private void handleIrqHandlerEntry(ITmfEvent event) {
  95         pushInterruptContext(event, Context.IRQ);
  96     }
  97
  98     private void handleIrqHandlerExit(ITmfEvent event) {
  99         popInterruptContext(event, Context.IRQ);
 100     }
 101
 102     private void handleHrtimerExpireEntry(ITmfEvent event) {
 103         pushInterruptContext(event, Context.HRTIMER);
 104     }
 105
 106     private void handleHrtimerExpireExit(ITmfEvent event) {
 107         popInterruptContext(event, Context.HRTIMER);
 108     }
 109
 110 }