analysis/org.eclipse.tracecompass.analysis.os.linux.core/src/org/eclipse/tracecompass/internal/analysis/os/linux/core/kernel/handlers/IrqEntryHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *    Matthew Khouzam - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.handlers;
  14
  15 import org.eclipse.tracecompass.analysis.os.linux.core.kernelanalysis.Attributes;
  16 import org.eclipse.tracecompass.analysis.os.linux.core.kernelanalysis.StateValues;
  17 import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
  18 import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder;
  19 import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException;
  20 import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue;
  21 import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue;
  22 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  23
  24 /**
  25  * Irq Entry Handler
  26  */
  27 public class IrqEntryHandler extends KernelEventHandler {
  28
  29     /**
  30      * Constructor
  31      *
  32      * @param layout
  33      *            event layout
  34      */
  35     public IrqEntryHandler(IKernelAnalysisEventLayout layout) {
  36         super(layout);
  37     }
  38
  39     @Override
  40     public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException {
  41
  42         Integer cpu = KernelEventHandlerUtils.getCpu(event);
  43         if (cpu == null) {
  44             return;
  45         }
  46         Integer irqId = ((Long) event.getContent().getField(getLayout().fieldIrq()).getValue()).intValue();
  47
  48         /*
  49          * Mark this IRQ as active in the resource tree. The state value = the
  50          * CPU on which this IRQ is sitting
  51          */
  52         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeIRQs(cpu, ss), irqId.toString());
  53
  54         ITmfStateValue value = TmfStateValue.newValueInt(cpu.intValue());
  55         long timestamp = KernelEventHandlerUtils.getTimestamp(event);
  56         ss.modifyAttribute(timestamp, value, quark);
  57
  58         /* Change the status of the running process to interrupted */
  59         quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss), Attributes.STATUS);
  60         value = StateValues.PROCESS_STATUS_INTERRUPTED_VALUE;
  61         ss.modifyAttribute(timestamp, value, quark);
  62
  63         /* Change the status of the CPU to interrupted */
  64         quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getCurrentCPUNode(cpu, ss), Attributes.STATUS);
  65         value = StateValues.CPU_STATUS_IRQ_VALUE;
  66         ss.modifyAttribute(timestamp, value, quark);
  67     }
  68
  69 }