lttng/org.lttng.scope.lttng.kernel.core/src/org/lttng/scope/lttng/kernel/core/analysis/os/handlers/internal/IrqExitHandler.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.trace.layout.ILttngKernelEventLayout;
  17
  18 import ca.polymtl.dorsal.libdelorean.ITmfStateSystemBuilder;
  19 import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException;
  20 import ca.polymtl.dorsal.libdelorean.statevalue.TmfStateValue;
  21
  22 /**
  23  * Irq Exit handler
  24  */
  25 public class IrqExitHandler extends KernelEventHandler {
  26
  27     /**
  28      * Constructor
  29      *
  30      * @param layout
  31      *            event layout
  32      */
  33     public IrqExitHandler(ILttngKernelEventLayout layout) {
  34         super(layout);
  35     }
  36
  37     @Override
  38     public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException {
  39         Integer cpu = KernelEventHandlerUtils.getCpu(event);
  40         if (cpu == null) {
  41             return;
  42         }
  43         int currentThreadNode = KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss);
  44         Integer irqId = ((Long) event.getContent().getField(getLayout().fieldIrq()).getValue()).intValue();
  45         /* Put this IRQ back to inactive in the resource tree */
  46         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeIRQs(cpu, ss), irqId.toString());
  47         TmfStateValue value = TmfStateValue.nullValue();
  48         long timestamp = KernelEventHandlerUtils.getTimestamp(event);
  49         ss.modifyAttribute(timestamp, value, quark);
  50
  51         /* Set the previous process back to running */
  52         KernelEventHandlerUtils.setProcessToRunning(timestamp, currentThreadNode, ss);
  53
  54         /* Set the CPU status back to running or "idle" */
  55         KernelEventHandlerUtils.cpuExitInterrupt(timestamp, cpu, ss);
  56     }
  57 }