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/*******************************************************************************
* Copyright (c) 2018 Ecole Polytechnique de Montreal
*
* All rights reserved. This program and the accompanying materials are made
* available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*******************************************************************************/
package org.eclipse.tracecompass.incubator.internal.ftrace.core.trace;
import com.google.common.collect.ImmutableSet;
import org.eclipse.core.resources.IResource;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelTrace;
import org.eclipse.tracecompass.incubator.internal.ftrace.core.Activator;
import org.eclipse.tracecompass.incubator.internal.ftrace.core.event.GenericFtraceAspects;
import org.eclipse.tracecompass.incubator.internal.ftrace.core.event.GenericFtraceEvent;
import org.eclipse.tracecompass.incubator.internal.ftrace.core.event.GenericFtraceField;
import org.eclipse.tracecompass.incubator.internal.ftrace.core.event.IGenericFtraceConstants;
import org.eclipse.tracecompass.incubator.internal.ftrace.core.layout.GenericFtraceEventLayout;
import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
import org.eclipse.tracecompass.tmf.core.event.aspect.ITmfEventAspect;
import org.eclipse.tracecompass.tmf.core.exceptions.TmfTraceException;
import org.eclipse.tracecompass.tmf.core.io.BufferedRandomAccessFile;
import org.eclipse.tracecompass.tmf.core.trace.ITmfContext;
import org.eclipse.tracecompass.tmf.core.trace.TmfContext;
import org.eclipse.tracecompass.tmf.core.trace.TmfTrace;
import org.eclipse.tracecompass.tmf.core.trace.location.ITmfLocation;
import org.eclipse.tracecompass.tmf.core.trace.location.TmfLongLocation;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.regex.Matcher;
/**
* Generic Ftrace trace.
*
* @author Guillaume Champagne
* @author Alexis-Maurer Fortin
* @author Hugo Genesse
* @author Pierre-Yves Lajoie
* @author Eva Terriault
*/
public abstract class GenericFtrace extends TmfTrace implements IKernelTrace {
private static final int ESTIMATED_EVENT_SIZE = 90;
private static final TmfLongLocation NULL_LOCATION = new TmfLongLocation(-1L);
private static final TmfContext INVALID_CONTEXT = new TmfContext(NULL_LOCATION, ITmfContext.UNKNOWN_RANK);
private File fFile;
private RandomAccessFile fFileInput;
/**
* @param line
* Trace line to be parsed. This method can be overridden by
* Trace types that inherits from GenericFtrace.
* @return Parsed FtraceField
*/
protected @Nullable GenericFtraceField parseLine(String line) {
if (line != null) {
return GenericFtraceField.parseLine(line);
}
return null;
}
@Override
public void initTrace(IResource resource, String path, Class<? extends ITmfEvent> type) throws TmfTraceException {
super.initTrace(resource, path, type);
try {
fFile = new File(path);
fFileInput = new BufferedRandomAccessFile(fFile, "r"); //$NON-NLS-1$
} catch (IOException e) {
throw new TmfTraceException(e.getMessage(), e);
}
}
@Override
public synchronized void dispose() {
if (fFileInput != null) {
try {
fFileInput.close();
} catch (IOException e) {
Activator.getInstance().logError("Error disposing trace. File: " + getPath(), e); //$NON-NLS-1$
}
}
super.dispose();
}
@Override
public double getLocationRatio(ITmfLocation location) {
return ((Long) getCurrentLocation().getLocationInfo()).doubleValue() / fFile.length();
}
@Override
public ITmfContext seekEvent(ITmfLocation location) {
if (fFile == null) {
return INVALID_CONTEXT;
}
final TmfContext context = new TmfContext(NULL_LOCATION, ITmfContext.UNKNOWN_RANK);
if (NULL_LOCATION.equals(location)) {
return context;
}
try {
if (location == null) {
fFileInput.seek(0);
long lineStartOffset = fFileInput.getFilePointer();
String line = fFileInput.readLine();
Matcher matcher = IGenericFtraceConstants.FTRACE_PATTERN.matcher(line);
while (!matcher.matches()) {
lineStartOffset = fFileInput.getFilePointer();
line = fFileInput.readLine();
matcher = IGenericFtraceConstants.FTRACE_PATTERN.matcher(line);
}
fFileInput.seek(lineStartOffset);
} else if (location.getLocationInfo() instanceof Long) {
fFileInput.seek((Long) location.getLocationInfo());
}
context.setLocation(new TmfLongLocation(fFileInput.getFilePointer()));
context.setRank(0);
return context;
} catch (final FileNotFoundException e) {
Activator.getInstance().logError("Error seeking event. File not found: " + getPath(), e); //$NON-NLS-1$
return context;
} catch (final IOException e) {
Activator.getInstance().logError("Error seeking event. File: " + getPath(), e); //$NON-NLS-1$
return context;
}
}
@Override
public ITmfEvent parseEvent(ITmfContext context) {
@Nullable
ITmfLocation location = context.getLocation();
if (location instanceof TmfLongLocation) {
TmfLongLocation tmfLongLocation = (TmfLongLocation) location;
Long locationInfo = tmfLongLocation.getLocationInfo();
if (location.equals(NULL_LOCATION)) {
locationInfo = 0L;
}
if (locationInfo != null) {
try {
if (!locationInfo.equals(fFileInput.getFilePointer())) {
fFileInput.seek(locationInfo);
}
String nextLine = fFileInput.readLine();
GenericFtraceField field = parseLine(nextLine);
if (field != null) {
return new GenericFtraceEvent(this, context.getRank(), field);
}
} catch (IOException e) {
Activator.getInstance().logError("Error parsing event", e); //$NON-NLS-1$
}
}
}
return null;
}
@Override
public ITmfLocation getCurrentLocation() {
long temp = -1;
try {
temp = fFileInput.getFilePointer();
} catch (IOException e) {
}
return new TmfLongLocation(temp);
}
@Override
public ITmfContext seekEvent(double ratio) {
File file = fFile;
if (file == null) {
return INVALID_CONTEXT;
}
long filePos = (long) (file.length() * ratio);
long estimatedRank = filePos / ESTIMATED_EVENT_SIZE;
return seekEvent(new TmfLongLocation(estimatedRank));
}
@Override
public Iterable<ITmfEventAspect<?>> getEventAspects() {
/*
* This method needs to fill the aspects dynamically because aspects in the
* parent class are not all present at the beginning of the trace
*/
ImmutableSet.Builder<ITmfEventAspect<?>> builder = ImmutableSet.builder();
builder.addAll(GenericFtraceAspects.getAspects());
return builder.build();
}
@Override
public IKernelAnalysisEventLayout getKernelEventLayout() {
return GenericFtraceEventLayout.getInstance();
}
}
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