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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 | ||
0f7a12d3 | 15 | import org.eclipse.tracecompass.analysis.os.linux.core.kernel.StateValues; |
c8f45ad2 | 16 | import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout; |
f69045e2 | 17 | import org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.Attributes; |
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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(); | |
8a0bbebf | 43 | Integer cpu = KernelEventHandlerUtils.getCpu(event); |
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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 | ||
8a0bbebf MJ |
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 | ||
6fdc59f8 | 59 | final int threadsNode = KernelEventHandlerUtils.getNodeThreads(ss); |
8a0bbebf MJ |
60 | Integer parentTidNode = ss.getQuarkRelativeAndAdd(threadsNode, parentThreadAttributeName); |
61 | Integer childTidNode = ss.getQuarkRelativeAndAdd(threadsNode, childThreadAttributeName); | |
62 | ||
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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); | |
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83 | if (!value.isNull()) { |
84 | quark = ss.getQuarkRelativeAndAdd(childTidNode, Attributes.SYSTEM_CALL); | |
85 | ss.modifyAttribute(timestamp, value, quark); | |
c8f45ad2 | 86 | } |
2e3a31c4 | 87 | |
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88 | } |
89 | } |