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.common.core.NonNullUtils;
  14 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.building.LttngKernelExecGraphProvider;
  15 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.building.LttngKernelExecGraphProvider.Context;
  16 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.model.LttngInterruptContext;
  17 import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.graph.model.LttngSystemModel;
  18 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  19 import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
  20 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  21
  22 /**
  23  * Event Handler to handle the interrupt context stack of the model
  24  *
  25  * @author Francis Giraldeau
  26  * @author Geneviève Bastien
  27  */
  28 public class EventContextHandler extends BaseHandler {
  29
  30     /**
  31      * Constructor
  32      *
  33      * @param provider
  34      *            The parent graph provider
  35      */
  36     public EventContextHandler(LttngKernelExecGraphProvider provider) {
  37         super(provider);
  38     }
  39
  40     @Override
  41     public void handleEvent(ITmfEvent event) {
  42         String eventName = event.getName();
  43         IKernelAnalysisEventLayout eventLayout = getProvider().getEventLayout();
  44         if (eventName.equals(eventLayout.eventSoftIrqEntry())) {
  45             handleSoftirqEntry(event);
  46         } else if (eventName.equals(eventLayout.eventSoftIrqExit())) {
  47             handleSoftirqExit(event);
  48         } else if (eventName.equals(eventLayout.eventHRTimerExpireEntry())) {
  49             handleHrtimerExpireEntry(event);
  50         } else if (eventName.equals(eventLayout.eventHRTimerExpireExit())) {
  51             handleHrtimerExpireExit(event);
  52         } else if (eventName.equals(eventLayout.eventIrqHandlerEntry())) {
  53             handleIrqHandlerEntry(event);
  54         } else if (eventName.equals(eventLayout.eventIrqHandlerExit())) {
  55             handleIrqHandlerExit(event);
  56         }
  57     }
  58
  59     private void pushInterruptContext(ITmfEvent event, Context ctx) {
  60         Integer cpu = NonNullUtils.checkNotNull(TmfTraceUtils.resolveIntEventAspectOfClassForEvent(event.getTrace(), TmfCpuAspect.class, event));
  61         LttngSystemModel system = getProvider().getSystem();
  62
  63         LttngInterruptContext interruptCtx = new LttngInterruptContext(event, ctx);
  64
  65         system.pushContextStack(event.getTrace().getHostId(), cpu, interruptCtx);
  66     }
  67
  68     private void popInterruptContext(ITmfEvent event, Context ctx) {
  69         Integer cpu = NonNullUtils.checkNotNull(TmfTraceUtils.resolveIntEventAspectOfClassForEvent(event.getTrace(), TmfCpuAspect.class, event));
  70         LttngSystemModel system = getProvider().getSystem();
  71
  72         /* TODO: add a warning bookmark if the interrupt context is not coherent */
  73         LttngInterruptContext interruptCtx = system.peekContextStack(event.getTrace().getHostId(), cpu);
  74         if (interruptCtx.getContext() == ctx) {
  75             system.popContextStack(event.getTrace().getHostId(), cpu);
  76         }
  77     }
  78
  79     private void handleSoftirqEntry(ITmfEvent event) {
  80         pushInterruptContext(event, Context.SOFTIRQ);
  81     }
  82
  83     private void handleSoftirqExit(ITmfEvent event) {
  84         popInterruptContext(event, Context.SOFTIRQ);
  85     }
  86
  87     private void handleIrqHandlerEntry(ITmfEvent event) {
  88         pushInterruptContext(event, Context.IRQ);
  89     }
  90
  91     private void handleIrqHandlerExit(ITmfEvent event) {
  92         popInterruptContext(event, Context.IRQ);
  93     }
  94
  95     private void handleHrtimerExpireEntry(ITmfEvent event) {
  96         pushInterruptContext(event, Context.HRTIMER);
  97     }
  98
  99     private void handleHrtimerExpireExit(ITmfEvent event) {
 100         popInterruptContext(event, Context.HRTIMER);
 101     }
 102
 103 }