Commit | Line | Data |
---|---|---|
451ba2f7 AM |
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 static java.util.Objects.requireNonNull; | |
16 | ||
17 | import org.eclipse.jdt.annotation.Nullable; | |
18 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; | |
19 | import org.eclipse.tracecompass.tmf.core.event.ITmfEventField; | |
20 | import org.lttng.scope.lttng.kernel.core.analysis.os.Attributes; | |
21 | import org.lttng.scope.lttng.kernel.core.analysis.os.LinuxValues; | |
22 | import org.lttng.scope.lttng.kernel.core.analysis.os.StateValues; | |
23 | import org.lttng.scope.lttng.kernel.core.trace.layout.ILttngKernelEventLayout; | |
24 | ||
25 | import ca.polymtl.dorsal.libdelorean.ITmfStateSystemBuilder; | |
26 | import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException; | |
27 | import ca.polymtl.dorsal.libdelorean.exceptions.StateValueTypeException; | |
28 | import ca.polymtl.dorsal.libdelorean.statevalue.ITmfStateValue; | |
29 | import ca.polymtl.dorsal.libdelorean.statevalue.TmfStateValue; | |
30 | ||
31 | /** | |
32 | * LTTng Specific state dump event handler | |
33 | */ | |
34 | public class StateDumpHandler extends KernelEventHandler { | |
35 | ||
36 | /** | |
37 | * Constructor | |
38 | * | |
39 | * @param layout | |
40 | * event layout | |
41 | */ | |
42 | public StateDumpHandler(ILttngKernelEventLayout layout) { | |
43 | super(layout); | |
44 | } | |
45 | ||
46 | @Override | |
47 | public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { | |
48 | ITmfEventField content = event.getContent(); | |
49 | Integer eventCpu = KernelEventHandlerUtils.getCpu(event); | |
50 | int tid = ((Long) content.getField("tid").getValue()).intValue(); //$NON-NLS-1$ | |
51 | int pid = ((Long) content.getField("pid").getValue()).intValue(); //$NON-NLS-1$ | |
52 | int ppid = ((Long) content.getField("ppid").getValue()).intValue(); //$NON-NLS-1$ | |
53 | int status = ((Long) content.getField("status").getValue()).intValue(); //$NON-NLS-1$ | |
54 | String name = requireNonNull((String) content.getField("name").getValue()); //$NON-NLS-1$ | |
55 | /* Only present in LTTng 2.10+ */ | |
56 | @Nullable Long cpuField = content.getFieldValue(Long.class, "cpu"); //$NON-NLS-1$ | |
57 | /* | |
58 | * "mode" could be interesting too, but it doesn't seem to be populated | |
59 | * with anything relevant for now. | |
60 | */ | |
61 | ||
62 | String threadAttributeName = Attributes.buildThreadAttributeName(tid, eventCpu); | |
63 | if (threadAttributeName == null) { | |
64 | return; | |
65 | } | |
66 | ||
67 | int curThreadNode = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeThreads(ss), threadAttributeName); | |
68 | long timestamp = KernelEventHandlerUtils.getTimestamp(event); | |
69 | /* Set the process' name */ | |
70 | setProcessName(ss, name, curThreadNode, timestamp); | |
71 | ||
72 | /* Set the process' PPID */ | |
73 | setPpid(ss, tid, pid, ppid, curThreadNode, timestamp); | |
74 | ||
75 | /* Set the process' status */ | |
76 | setStatus(ss, status, curThreadNode, cpuField, timestamp); | |
77 | } | |
78 | ||
79 | private static void setStatus(ITmfStateSystemBuilder ss, int status, int curThreadNode, @Nullable Long cpu, long timestamp) { | |
80 | ITmfStateValue value; | |
81 | if (ss.queryOngoingState(curThreadNode).isNull()) { | |
82 | switch (status) { | |
83 | case LinuxValues.STATEDUMP_PROCESS_STATUS_WAIT_CPU: | |
84 | value = StateValues.PROCESS_STATUS_WAIT_FOR_CPU_VALUE; | |
85 | setRunQueue(ss, curThreadNode, cpu, timestamp); | |
86 | break; | |
87 | case LinuxValues.STATEDUMP_PROCESS_STATUS_WAIT: | |
88 | /* | |
89 | * We have no information on what the process is waiting on | |
90 | * (unlike a sched_switch for example), so we will use the | |
91 | * WAIT_UNKNOWN state instead of the "normal" WAIT_BLOCKED | |
92 | * state. | |
93 | */ | |
94 | value = StateValues.PROCESS_STATUS_WAIT_UNKNOWN_VALUE; | |
95 | break; | |
96 | default: | |
97 | value = StateValues.PROCESS_STATUS_UNKNOWN_VALUE; | |
98 | } | |
99 | ss.modifyAttribute(timestamp, value, curThreadNode); | |
100 | } | |
101 | } | |
102 | ||
103 | private static void setRunQueue(ITmfStateSystemBuilder ss, int curThreadNode, @Nullable Long cpu, long timestamp) { | |
104 | if (cpu != null) { | |
105 | int quark = ss.getQuarkRelativeAndAdd(curThreadNode, Attributes.CURRENT_CPU_RQ); | |
106 | ITmfStateValue value = TmfStateValue.newValueInt(cpu.intValue()); | |
107 | ss.modifyAttribute(timestamp, value, quark); | |
108 | } | |
109 | } | |
110 | ||
111 | private static void setPpid(ITmfStateSystemBuilder ss, int tid, int pid, int ppid, int curThreadNode, long timestamp) | |
112 | throws StateValueTypeException, AttributeNotFoundException { | |
113 | ITmfStateValue value; | |
114 | int quark; | |
115 | quark = ss.getQuarkRelativeAndAdd(curThreadNode, Attributes.PPID); | |
116 | if (ss.queryOngoingState(quark).isNull()) { | |
117 | if (pid == tid) { | |
118 | /* We have a process. Use the 'PPID' field. */ | |
119 | value = TmfStateValue.newValueInt(ppid); | |
120 | } else { | |
121 | /* We have a thread, use the 'PID' field for the parent. */ | |
122 | value = TmfStateValue.newValueInt(pid); | |
123 | } | |
124 | ss.modifyAttribute(timestamp, value, quark); | |
125 | } | |
126 | } | |
127 | ||
128 | private static void setProcessName(ITmfStateSystemBuilder ss, String name, int curThreadNode, long timestamp) | |
129 | throws StateValueTypeException, AttributeNotFoundException { | |
130 | ITmfStateValue value; | |
131 | int quark = ss.getQuarkRelativeAndAdd(curThreadNode, Attributes.EXEC_NAME); | |
132 | if (ss.queryOngoingState(quark).isNull()) { | |
133 | /* If the value didn't exist previously, set it */ | |
134 | value = TmfStateValue.newValueString(name); | |
135 | ss.modifyAttribute(timestamp, value, quark); | |
136 | } | |
137 | } | |
138 | } |