| /******************************************************************************* |
| * Copyright (c) 2015, 2016 EfficiOS Inc., Alexandre Montplaisir and others |
| * |
| * 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 |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.analysis.os.linux.core.latency; |
| |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jdt.annotation.Nullable; |
| import org.eclipse.tracecompass.datastore.core.interval.IHTIntervalReader; |
| import org.eclipse.tracecompass.datastore.core.serialization.ISafeByteBufferWriter; |
| import org.eclipse.tracecompass.datastore.core.serialization.SafeByteBufferFactory; |
| import org.eclipse.tracecompass.segmentstore.core.ISegment; |
| import org.eclipse.tracecompass.segmentstore.core.segment.interfaces.INamedSegment; |
| import org.eclipse.tracecompass.tmf.core.event.lookup.ITmfCallsite; |
| import org.eclipse.tracecompass.tmf.core.event.lookup.ITmfSourceLookup; |
| |
| /** |
| * A linux kernel system call, represented as an {@link ISegment}. |
| * |
| * @author Alexandre Montplaisir |
| * @since 2.0 |
| */ |
| public final class SystemCall implements INamedSegment, ITmfSourceLookup { |
| |
| private static final long serialVersionUID = 1554494342105208730L; |
| |
| /** |
| * The reader for this segment class |
| */ |
| public static final IHTIntervalReader<ISegment> READER = buffer -> new SystemCall(buffer.getLong(), buffer.getLong(), buffer.getString(), buffer.getInt(), buffer.getInt()); |
| |
| /** |
| * The subset of information that is available from the syscall entry event. |
| */ |
| public static class InitialInfo { |
| |
| private long fStartTime; |
| private String fName; |
| private int fTid; |
| |
| /** |
| * @param startTime |
| * Start time of the system call |
| * @param name |
| * Name of the system call |
| * @param tid |
| * The TID of the thread running this sytem call |
| */ |
| public InitialInfo( |
| long startTime, |
| String name, |
| int tid) { |
| fStartTime = startTime; |
| fName = name.intern(); |
| fTid = tid; |
| } |
| } |
| |
| private final long fStartTime; |
| private final long fEndTime; |
| private final String fName; |
| private final int fTid; |
| private final int fRet; |
| |
| /** |
| * @param info |
| * Initial information of the system call |
| * @param endTime |
| * End time of the system call |
| * @param ret |
| * The return value of the system call |
| */ |
| public SystemCall( |
| InitialInfo info, |
| long endTime, int ret) { |
| fStartTime = info.fStartTime; |
| fName = info.fName; |
| fEndTime = endTime; |
| fTid = info.fTid; |
| fRet = ret; |
| } |
| |
| private SystemCall(long startTime, long endTime, String name, int tid, int ret) { |
| fStartTime = startTime; |
| fEndTime = endTime; |
| fName = name; |
| fTid = tid; |
| fRet = ret; |
| } |
| |
| @Override |
| public long getStart() { |
| return fStartTime; |
| } |
| |
| @Override |
| public long getEnd() { |
| return fEndTime; |
| } |
| |
| /** |
| * Get the name of the system call |
| * |
| * @return Name |
| */ |
| @Override |
| public String getName() { |
| return fName; |
| } |
| |
| /** |
| * Get the thread ID for this syscall |
| * |
| * @return The ID of the thread |
| */ |
| public int getTid() { |
| return fTid; |
| } |
| |
| /** |
| * Get the return value of the system call |
| * |
| * @return The return value of this syscall |
| */ |
| public int getReturnValue() { |
| return fRet; |
| } |
| |
| @Override |
| public int getSizeOnDisk() { |
| return 2 * Long.BYTES + SafeByteBufferFactory.getStringSizeInBuffer(fName) + 2 * Integer.BYTES; |
| } |
| |
| @Override |
| public void writeSegment(@NonNull ISafeByteBufferWriter buffer) { |
| buffer.putLong(fStartTime); |
| buffer.putLong(fEndTime); |
| buffer.putString(fName); |
| buffer.putInt(fTid); |
| buffer.putInt(fRet); |
| } |
| |
| @Override |
| public int compareTo(@NonNull ISegment o) { |
| int ret = INamedSegment.super.compareTo(o); |
| if (ret != 0) { |
| return ret; |
| } |
| return toString().compareTo(o.toString()); |
| } |
| |
| @Override |
| public String toString() { |
| return "Start Time = " + getStart() + //$NON-NLS-1$ |
| "; End Time = " + getEnd() + //$NON-NLS-1$ |
| "; Duration = " + getLength() + //$NON-NLS-1$ |
| "; Name = " + getName(); //$NON-NLS-1$ |
| } |
| |
| @Override |
| public @Nullable ITmfCallsite getCallsite() { |
| return (ITmfCallsite) SystemCallLatencyAnalysis.SyscallCallsiteAspect.INSTANCE.resolve(this); |
| } |
| |
| } |