/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* 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
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.plugin.gdb.server.parser;
import org.eclipse.che.api.debug.shared.model.Location;
import org.eclipse.che.api.debug.shared.model.impl.LocationImpl;
import org.eclipse.che.plugin.gdb.server.exception.GdbParseException;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 'backtrace' command parser.
*
* @author Roman Nikitenko
*/
public class GdbBacktrace {
private static final Pattern GDB_FILE_LOCATION = Pattern.compile("^([0-9]*) .* at (.*):([0-9]*).*", Pattern.DOTALL);
private static final Pattern GDB_LIBRARY_LOCATION = Pattern.compile("^([0-9]*) .* from (.*)", Pattern.DOTALL);
private final Map<Integer, Location> frames;
public GdbBacktrace(Map<Integer, Location> frames) {
this.frames = frames;
}
public Map<Integer, Location> getFrames() {
return frames;
}
/**
* Factory method.
*/
public static GdbBacktrace parse(GdbOutput gdbOutput) throws GdbParseException {
Matcher matcher;
final String output = gdbOutput.getOutput();
final String[] framesInfo = output.split("#");
final Map<Integer, Location> frames = new HashMap<>(framesInfo.length);
for (String frame : framesInfo) {
try {
matcher = GDB_FILE_LOCATION.matcher(frame);
if (matcher.find()) {
final String fileLocation = matcher.group(2);
final int lineNumber = Integer.parseInt(matcher.group(3));
final int frameNumber = Integer.parseInt(matcher.group(1));
final Location location = new LocationImpl(fileLocation, lineNumber);
frames.put(frameNumber, location);
continue;
}
matcher = GDB_LIBRARY_LOCATION.matcher(frame);
if (matcher.find()) {
final int frameNumber = Integer.parseInt(matcher.group(1));
final String libraryLocation = matcher.group(2);
final Location location = new LocationImpl(libraryLocation);
frames.put(frameNumber, location);
}
} catch (NumberFormatException e) {
//we can't get info about current frame, but we are trying to get info about another frames
}
}
if (!frames.isEmpty()) {
return new GdbBacktrace(frames);
}
throw new GdbParseException(GdbBacktrace.class, output);
}
}