lttng/org.lttng.scope.lttng.kernel.core/src/org/lttng/scope/lttng/kernel/core/analysis/os/handlers/internal/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.lttng.scope.lttng.kernel.core.analysis.os.handlers.internal;
  14
  15 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  16 import org.lttng.scope.lttng.kernel.core.analysis.os.StateValues;
  17 import org.lttng.scope.lttng.kernel.core.trace.layout.ILttngKernelEventLayout;
  18
  19 import ca.polymtl.dorsal.libdelorean.ITmfStateSystemBuilder;
  20 import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException;
  21 import ca.polymtl.dorsal.libdelorean.statevalue.ITmfStateValue;
  22 import ca.polymtl.dorsal.libdelorean.statevalue.TmfStateValue;
  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(ILttngKernelEventLayout 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.
  50          */
  51         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeIRQs(cpu, ss), irqId.toString());
  52
  53         ITmfStateValue value = TmfStateValue.newValueInt(StateValues.CPU_STATUS_IRQ);
  54         long timestamp = KernelEventHandlerUtils.getTimestamp(event);
  55         ss.modifyAttribute(timestamp, value, quark);
  56
  57         /* Change the status of the running process to interrupted */
  58         quark = KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss);
  59         value = StateValues.PROCESS_STATUS_INTERRUPTED_VALUE;
  60         ss.modifyAttribute(timestamp, value, quark);
  61
  62         /* Change the status of the CPU to interrupted */
  63         quark = KernelEventHandlerUtils.getCurrentCPUNode(cpu, ss);
  64         value = StateValues.CPU_STATUS_IRQ_VALUE;
  65         ss.modifyAttribute(timestamp, value, quark);
  66     }
  67
  68 }