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/*******************************************************************************
 * Copyright (c) 2004, 2008, 2009 Red Hat, Inc. and others
 * (C) Copyright IBM Corp. 2010
 * 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:
 *    Kent Sebastian <ksebasti@redhat.com> - initial API and implementation
 *    Keith Seitz <keiths@redhat.com> - setup code in launch the method, initially
 *        written in the now-defunct OprofileSession class
 *    QNX Software Systems and others - the section of code marked in the launch
 *        method, and the exec method
 *    Thavidu Ranatunga (IBM) - This code is based on the AbstractOprofileLauncher
 *        class code for the OProfile plugin.  Part of that was originally adapted
 *        from code written by QNX Software Systems and others for the CDT
 *        LocalCDILaunchDelegate class.
 *******************************************************************************/
package org.eclipse.linuxtools.internal.perf.launch;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.cdt.debug.core.CDebugUtils;
import org.eclipse.cdt.debug.core.ICDTLaunchConfigurationConstants;
import org.eclipse.cdt.launch.AbstractCLaunchDelegate;
import org.eclipse.core.filesystem.EFS;
import org.eclipse.core.filesystem.IFileInfo;
import org.eclipse.core.filesystem.IFileStore;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.linuxtools.internal.perf.PerfCore;
import org.eclipse.linuxtools.internal.perf.PerfPlugin;
import org.eclipse.linuxtools.internal.perf.SourceDisassemblyData;
import org.eclipse.linuxtools.internal.perf.StatData;
import org.eclipse.linuxtools.internal.perf.ui.SourceDisassemblyView;
import org.eclipse.linuxtools.internal.perf.ui.StatView;
import org.eclipse.linuxtools.profiling.launch.ConfigUtils;
import org.eclipse.linuxtools.profiling.launch.IRemoteFileProxy;
import org.eclipse.linuxtools.profiling.launch.RemoteConnection;
import org.eclipse.linuxtools.profiling.launch.RemoteConnectionException;
import org.eclipse.linuxtools.profiling.launch.RemoteProxyCMainTab;
import org.eclipse.linuxtools.profiling.launch.RemoteProxyManager;
import org.eclipse.linuxtools.tools.launch.core.factory.RuntimeProcessFactory;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.console.ConsolePlugin;
import org.eclipse.ui.console.IConsole;
import org.eclipse.ui.console.IConsoleManager;
import org.eclipse.ui.console.IOConsole;
import org.eclipse.ui.console.MessageConsole;
import org.eclipse.ui.console.MessageConsoleStream;

public class PerfLaunchConfigDelegate extends AbstractCLaunchDelegate {

    private static final String OUTPUT_STR = "--output="; //$NON-NLS-1$
    private static final String EMPTY_STRING = ""; //$NON-NLS-1$
    private IPath binPath;
    private IPath workingDirPath;
    private IProject project;

    @Override
    protected String getPluginID() {
        return PerfPlugin.PLUGIN_ID;
    }

    @Override
    public void launch(ILaunchConfiguration config, String mode,
            ILaunch launch, IProgressMonitor monitor) throws CoreException {
        try {
            ConfigUtils configUtils = new ConfigUtils(config);
            project = configUtils.getProject();
            // check if Perf exists in $PATH
            if (! PerfCore.checkPerfInPath(project))
            {
                IStatus status = new Status(IStatus.ERROR, PerfPlugin.PLUGIN_ID, "Error: Perf was not found on PATH"); //$NON-NLS-1$
                throw new CoreException(status);
            }

            URI workingDirURI = new URI(config.getAttribute(RemoteProxyCMainTab.ATTR_REMOTE_WORKING_DIRECTORY_NAME, EMPTY_STRING));
            // Local project
            if (workingDirURI.toString().equals(EMPTY_STRING)) {
            	workingDirURI = getWorkingDirectory(config).toURI();
            	workingDirPath = Path.fromPortableString(workingDirURI.getPath());
            	binPath = CDebugUtils.verifyProgramPath(config);
            } else {
            	workingDirPath = Path.fromPortableString(workingDirURI.getPath() + IPath.SEPARATOR);
            	URI binURI = new URI(configUtils.getExecutablePath());
            	binPath = Path.fromPortableString(binURI.getPath().toString());
            }

            PerfPlugin.getDefault().setWorkingDir(workingDirPath);
            if (config.getAttribute(PerfPlugin.ATTR_ShowStat,
                    PerfPlugin.ATTR_ShowStat_default)) {
                showStat(config, launch);
            } else {
                String perfPathString = RuntimeProcessFactory.getFactory().whichCommand(PerfPlugin.PERF_COMMAND, project);
                IFileStore workingDir;
                RemoteConnection workingDirRC = new RemoteConnection(workingDirURI);
                IRemoteFileProxy workingDirRFP = workingDirRC.getRmtFileProxy();
                workingDir = workingDirRFP.getResource(workingDirURI.getPath());
                //Build the commandline string to run perf recording the given project
                String arguments[] = getProgramArgumentsArray( config ); //Program args from launch config.
                ArrayList<String> command = new ArrayList<>( 4 + arguments.length );
                command.addAll(Arrays.asList(PerfCore.getRecordString(config))); //Get the base commandline string (with flags/options based on config)
                command.add( binPath.toPortableString() ); // Add the path to the executable
                command.set(0, perfPathString);
                command.add(2,OUTPUT_STR + PerfPlugin.PERF_DEFAULT_DATA);
                //Compile string
                command.addAll( Arrays.asList( arguments ) );


                //Spawn the process
                String[] commandArray = command.toArray(new String[command.size()]);
                Process pProxy = RuntimeProcessFactory.getFactory().exec(commandArray, getEnvironment(config), workingDir, project);
                MessageConsole console = new MessageConsole("Perf Console", null); //$NON-NLS-1$
                console.activate();
                ConsolePlugin.getDefault().getConsoleManager().addConsoles(new IConsole[] { console });
                MessageConsoleStream stream = console.newMessageStream();

                if (pProxy != null) {
                    try (BufferedReader error = new BufferedReader(
                            new InputStreamReader(pProxy.getErrorStream()))) {
                        String err = error.readLine();
                        while (err != null) {
                            stream.println(err);
                            err = error.readLine();
                        }
                    }
                }



                /* This commented part is the basic method to run perf record without integrating into eclipse.
                        String binCall = exePath.toOSString();
                        for(String arg : arguments) {
                            binCall.concat(" " + arg);
                        }
                        PerfCore.Run(binCall);*/

                pProxy.destroy();
                PrintStream print = null;
                if (config.getAttribute(IDebugUIConstants.ATTR_CAPTURE_IN_CONSOLE, true)) {
                    //Get the console to output to.
                    //This may not be the best way to accomplish this but it shall do for now.
                    ConsolePlugin plugin = ConsolePlugin.getDefault();
                    IConsoleManager conMan = plugin.getConsoleManager();
                    IConsole[] existing = conMan.getConsoles();
                    IOConsole binaryOutCons = null;

                    //Find the console
                    for(IConsole x : existing) {
                        if (x.getName().contains(renderProcessLabel(commandArray[0]))) {
                            binaryOutCons = (IOConsole)x;
                        }
                    }
                    if ((binaryOutCons == null) && (existing.length != 0)) { //if can't be found get the most recent opened, this should probably never happen.
                        if (existing[existing.length - 1] instanceof IOConsole)
                            binaryOutCons = (IOConsole)existing[existing.length - 1];
                    }

                    //Get the printstream via the outputstream.
                    //Get ouput stream
                    OutputStream outputTo;
                    if (binaryOutCons != null) {
                        outputTo = binaryOutCons.newOutputStream();
                        //Get the printstream for that console
                        print = new PrintStream(outputTo);
                    }

                    for (int i = 0; i < command.size(); i++) {
                        print.print(command.get(i) + " "); //$NON-NLS-1$
                    }

                    //Print Message
                    print.println();
                    print.println("Analysing recorded perf.data, please wait..."); //$NON-NLS-1$
                    //Possibly should pass this (the console reference) on to PerfCore.Report if theres anything we ever want to spit out to user.
                }
                PerfCore.report(config, workingDirPath, monitor, null, print);

                URI perfDataURI = null;
                IRemoteFileProxy proxy = null;
                perfDataURI = new URI(workingDirURI.toString() + IPath.SEPARATOR + PerfPlugin.PERF_DEFAULT_DATA);
                proxy = RemoteProxyManager.getInstance().getFileProxy(perfDataURI);
                IFileStore perfDataFileStore = proxy.getResource(perfDataURI.getPath());
                IFileInfo info = perfDataFileStore.fetchInfo();
                info.setAttribute(EFS.ATTRIBUTE_READ_ONLY, true);
                perfDataFileStore.putInfo(info, EFS.SET_ATTRIBUTES, null);

                PerfCore.refreshView(renderProcessLabel(binPath.toPortableString()));
                if (config.getAttribute(PerfPlugin.ATTR_ShowSourceDisassembly,
                        PerfPlugin.ATTR_ShowSourceDisassembly_default)) {
                    showSourceDisassembly(Path.fromPortableString(workingDirURI.toString() + IPath.SEPARATOR));
                }

            }
        } catch (IOException e) {
            e.printStackTrace();
            abort(e.getLocalizedMessage(), null, ICDTLaunchConfigurationConstants.ERR_INTERNAL_ERROR);
        } catch (RemoteConnectionException e) {
            e.printStackTrace();
            abort(e.getLocalizedMessage(), null, ICDTLaunchConfigurationConstants.ERR_INTERNAL_ERROR);
        } catch (URISyntaxException e) {
            e.printStackTrace();
            abort(e.getLocalizedMessage(), null, ICDTLaunchConfigurationConstants.ERR_INTERNAL_ERROR);
        }
    }

    /**
     * Show source disassembly view.
     * @param workingDir working directory.
     */
    private void showSourceDisassembly(IPath workingDir) {
        String title = renderProcessLabel(workingDir.toPortableString() + PerfPlugin.PERF_DEFAULT_DATA);
        SourceDisassemblyData sdData = new SourceDisassemblyData(title, workingDir, project);
        sdData.parse();
        PerfPlugin.getDefault().setSourceDisassemblyData(sdData);
        SourceDisassemblyView.refreshView();
    }

    /**
     * Show statistics view.
     * @param config launch configuration
     * @param launch launch
     * @throws CoreException
     */
    private void showStat(ILaunchConfiguration config, ILaunch launch)
            throws CoreException {
        // Build the command line string
        String arguments[] = getProgramArgumentsArray(config);

        // Get working directory
        int runCount = config.getAttribute(PerfPlugin.ATTR_StatRunCount,
                PerfPlugin.ATTR_StatRunCount_default);
        StringBuffer args = new StringBuffer();
        for (String arg : arguments) {
            args.append(arg);
            args.append(" "); //$NON-NLS-1$
        }
        URI binURI = null;
        try {
            binURI = new URI(binPath.toPortableString());
        } catch (URISyntaxException e) {
            MessageDialog.openError(Display.getCurrent().getActiveShell(), Messages.MsgProxyError, Messages.MsgProxyError);
        }
        Object[] titleArgs = new Object[]{binURI.getPath(), args.toString(), String.valueOf(runCount)};
        String title = renderProcessLabel(MessageFormat.format(Messages.PerfLaunchConfigDelegate_stat_title, titleArgs));

        List<String> configEvents = config.getAttribute(PerfPlugin.ATTR_SelectedEvents,
                PerfPlugin.ATTR_SelectedEvents_default);

        String[] statEvents  = new String [] {};

        if(!config.getAttribute(PerfPlugin.ATTR_DefaultEvent, PerfPlugin.ATTR_DefaultEvent_default)){
            // gather selected events
            statEvents = (configEvents == null) ? statEvents : configEvents.toArray(new String[]{});
        }

        StatData sd = new StatData(title, workingDirPath, binURI.getPath(), arguments, runCount, statEvents, project);
        sd.setLaunch(launch);
        sd.parse();
        PerfPlugin.getDefault().setStatData(sd);
        sd.updateStatData();
        StatView.refreshView();
    }

}

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