| /******************************************************************************* |
| * Copyright (c) 2015 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Matthew Khouzam - Initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.handlers; |
| |
| import org.eclipse.tracecompass.analysis.os.linux.core.model.ProcessStatus; |
| import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout; |
| import org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.Attributes; |
| import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem; |
| import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder; |
| import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException; |
| import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue; |
| import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEventField; |
| |
| /** |
| * Fork Handler |
| */ |
| public class ProcessForkHandler extends KernelEventHandler { |
| |
| /** |
| * Constructor |
| * |
| * @param layout |
| * event layout |
| */ |
| public ProcessForkHandler(IKernelAnalysisEventLayout layout) { |
| super(layout); |
| } |
| |
| @Override |
| public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { |
| ITmfEventField content = event.getContent(); |
| Integer cpu = KernelEventHandlerUtils.getCpu(event); |
| String childProcessName = (String) content.getField(getLayout().fieldChildComm()).getValue(); |
| |
| Integer parentTid = ((Long) content.getField(getLayout().fieldParentTid()).getValue()).intValue(); |
| Integer childTid = ((Long) content.getField(getLayout().fieldChildTid()).getValue()).intValue(); |
| Long childPid = content.getFieldValue(Long.class, getLayout().fieldChildPid()); |
| |
| String parentThreadAttributeName = Attributes.buildThreadAttributeName(parentTid, cpu); |
| if (parentThreadAttributeName == null) { |
| return; |
| } |
| |
| String childThreadAttributeName = Attributes.buildThreadAttributeName(childTid, cpu); |
| if (childThreadAttributeName == null) { |
| return; |
| } |
| |
| final int threadsNode = KernelEventHandlerUtils.getNodeThreads(ss); |
| Integer parentTidNode = ss.getQuarkRelativeAndAdd(threadsNode, parentThreadAttributeName); |
| Integer childTidNode = ss.getQuarkRelativeAndAdd(threadsNode, childThreadAttributeName); |
| |
| /* Assign the PPID to the new process */ |
| int quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.PPID); |
| ITmfStateValue value = TmfStateValue.newValueInt(parentTid); |
| long timestamp = KernelEventHandlerUtils.getTimestamp(event); |
| ss.modifyAttribute(timestamp, parentTid, quark); |
| |
| if (childPid != null && childPid.intValue() != childTid) { |
| /* Assign the process ID of the new thread */ |
| quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.PID); |
| ss.modifyAttribute(timestamp, childPid.intValue(), quark); |
| } |
| |
| /* Set the new process' exec_name */ |
| quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.EXEC_NAME); |
| value = TmfStateValue.newValueString(childProcessName); |
| ss.modifyAttribute(timestamp, childProcessName, quark); |
| |
| /* Set the new process' status */ |
| value = ProcessStatus.WAIT_CPU.getStateValue(); |
| ss.modifyAttribute(timestamp, ProcessStatus.WAIT_CPU.getStateValue().unboxValue(), childTidNode); |
| |
| /* |
| * Set the process's run queue to be the same as the parent's, if |
| * available. |
| */ |
| quark = ss.optQuarkRelative(parentTidNode, Attributes.CURRENT_CPU_RQ); |
| if (quark != ITmfStateSystem.INVALID_ATTRIBUTE) { |
| value = ss.queryOngoingState(quark); |
| quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.CURRENT_CPU_RQ); |
| ss.modifyAttribute(timestamp, value.unboxValue(), quark); |
| } |
| |
| /* Set the process' syscall name, to be the same as the parent's */ |
| quark = ss.getQuarkRelativeAndAdd(parentTidNode, Attributes.SYSTEM_CALL); |
| value = ss.queryOngoingState(quark); |
| if (!value.isNull()) { |
| quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.SYSTEM_CALL); |
| ss.modifyAttribute(timestamp, value.unboxValue(), quark); |
| } |
| |
| } |
| } |