| 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.kernel.StateValues; |
| 16 | import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout; |
| 17 | import org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.Attributes; |
| 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 | import org.eclipse.tracecompass.tmf.core.event.ITmfEventField; |
| 24 | |
| 25 | /** |
| 26 | * Fork Handler |
| 27 | */ |
| 28 | public class ProcessForkHandler extends KernelEventHandler { |
| 29 | |
| 30 | /** |
| 31 | * Constructor |
| 32 | * |
| 33 | * @param layout |
| 34 | * event layout |
| 35 | */ |
| 36 | public ProcessForkHandler(IKernelAnalysisEventLayout layout) { |
| 37 | super(layout); |
| 38 | } |
| 39 | |
| 40 | @Override |
| 41 | public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { |
| 42 | ITmfEventField content = event.getContent(); |
| 43 | Integer cpu = KernelEventHandlerUtils.getCpu(event); |
| 44 | String childProcessName = (String) content.getField(getLayout().fieldChildComm()).getValue(); |
| 45 | |
| 46 | Integer parentTid = ((Long) content.getField(getLayout().fieldParentTid()).getValue()).intValue(); |
| 47 | Integer childTid = ((Long) content.getField(getLayout().fieldChildTid()).getValue()).intValue(); |
| 48 | |
| 49 | String parentThreadAttributeName = KernelEventHandlerUtils.buildThreadAttributeName(parentTid, cpu); |
| 50 | if (parentThreadAttributeName == null) { |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | String childThreadAttributeName = KernelEventHandlerUtils.buildThreadAttributeName(childTid, cpu); |
| 55 | if (childThreadAttributeName == null) { |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | final int threadsNode = KernelEventHandlerUtils.getNodeThreads(ss); |
| 60 | Integer parentTidNode = ss.getQuarkRelativeAndAdd(threadsNode, parentThreadAttributeName); |
| 61 | Integer childTidNode = ss.getQuarkRelativeAndAdd(threadsNode, childThreadAttributeName); |
| 62 | |
| 63 | |
| 64 | /* Assign the PPID to the new process */ |
| 65 | int quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.PPID); |
| 66 | ITmfStateValue value = TmfStateValue.newValueInt(parentTid); |
| 67 | long timestamp = KernelEventHandlerUtils.getTimestamp(event); |
| 68 | ss.modifyAttribute(timestamp, value, quark); |
| 69 | |
| 70 | /* Set the new process' exec_name */ |
| 71 | quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.EXEC_NAME); |
| 72 | value = TmfStateValue.newValueString(childProcessName); |
| 73 | ss.modifyAttribute(timestamp, value, quark); |
| 74 | |
| 75 | /* Set the new process' status */ |
| 76 | quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.STATUS); |
| 77 | value = StateValues.PROCESS_STATUS_WAIT_FOR_CPU_VALUE; |
| 78 | ss.modifyAttribute(timestamp, value, quark); |
| 79 | |
| 80 | /* Set the process' syscall name, to be the same as the parent's */ |
| 81 | quark = ss.getQuarkRelativeAndAdd(parentTidNode, Attributes.SYSTEM_CALL); |
| 82 | value = ss.queryOngoingState(quark); |
| 83 | if (!value.isNull()) { |
| 84 | quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.SYSTEM_CALL); |
| 85 | ss.modifyAttribute(timestamp, value, quark); |
| 86 | } |
| 87 | |
| 88 | } |
| 89 | } |