lttng/org.eclipse.tracecompass.lttng2.control.ui/src/org/eclipse/tracecompass/internal/lttng2/control/ui/views/service/LTTngControlService.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2016 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann - Initial API and implementation
  11  *   Bernd Hufmann - Updated for support of LTTng Tools 2.1
  12  *   Simon Delisle - Updated for support of LTTng Tools 2.2
  13  *   Marc-Andre Laperle - Support for creating a live session
  14  *   Markus Schorn - Bug 448058: Use org.eclipse.remote in favor of RSE
  15  **********************************************************************/
  16 package org.eclipse.tracecompass.internal.lttng2.control.ui.views.service;
  17
  18 import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull;
  19 import static org.eclipse.tracecompass.common.core.NonNullUtils.nullToEmptyString;
  20
  21 import java.util.ArrayList;
  22 import java.util.Arrays;
  23 import java.util.Iterator;
  24 import java.util.List;
  25 import java.util.regex.Matcher;
  26 import java.util.regex.Pattern;
  27
  28 import org.eclipse.core.commands.ExecutionException;
  29 import org.eclipse.core.runtime.IProgressMonitor;
  30 import org.eclipse.core.runtime.NullProgressMonitor;
  31 import org.eclipse.jdt.annotation.NonNull;
  32 import org.eclipse.jdt.annotation.Nullable;
  33 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IBaseEventInfo;
  34 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IChannelInfo;
  35 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IDomainInfo;
  36 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IEventInfo;
  37 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IFieldInfo;
  38 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IProbeEventInfo;
  39 import org.eclipse.tracecompass.internal.lttng2.control.core.model.ISessionInfo;
  40 import org.eclipse.tracecompass.internal.lttng2.control.core.model.ISnapshotInfo;
  41 import org.eclipse.tracecompass.internal.lttng2.control.core.model.IUstProviderInfo;
  42 import org.eclipse.tracecompass.internal.lttng2.control.core.model.LogLevelType;
  43 import org.eclipse.tracecompass.internal.lttng2.control.core.model.TraceEventType;
  44 import org.eclipse.tracecompass.internal.lttng2.control.core.model.TraceLogLevel;
  45 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.BaseEventInfo;
  46 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.BufferType;
  47 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.ChannelInfo;
  48 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.DomainInfo;
  49 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.EventInfo;
  50 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.FieldInfo;
  51 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.ProbeEventInfo;
  52 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.SessionInfo;
  53 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.SnapshotInfo;
  54 import org.eclipse.tracecompass.internal.lttng2.control.core.model.impl.UstProviderInfo;
  55 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.logging.ControlCommandLogger;
  56 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.messages.Messages;
  57 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.preferences.ControlPreferences;
  58 import org.eclipse.tracecompass.tmf.remote.core.shell.ICommandInput;
  59 import org.eclipse.tracecompass.tmf.remote.core.shell.ICommandResult;
  60 import org.eclipse.tracecompass.tmf.remote.core.shell.ICommandShell;
  61
  62 /**
  63  * <p>
  64  * Service for sending LTTng trace control commands to remote host.
  65  * </p>
  66  *
  67  * @author Bernd Hufmann
  68  */
  69 public class LTTngControlService implements ILttngControlService {
  70
  71     // ------------------------------------------------------------------------
  72     // Attributes
  73     // ------------------------------------------------------------------------
  74     /**
  75      * The command shell implementation
  76      */
  77     private final @NonNull ICommandShell fCommandShell;
  78
  79     /**
  80      * The version string.
  81      */
  82     private @NonNull LttngVersion fVersion = LttngVersion.NULL_VERSION;
  83
  84     // ------------------------------------------------------------------------
  85     // Constructors
  86     // ------------------------------------------------------------------------
  87
  88     /**
  89      * Constructor
  90      *
  91      * @param shell
  92      *            - the command shell implementation to use
  93      */
  94     public LTTngControlService(@NonNull ICommandShell shell) {
  95         fCommandShell = shell;
  96     }
  97
  98     // ------------------------------------------------------------------------
  99     // Accessors
 100     // ------------------------------------------------------------------------
 101
 102     @Override
 103     public String getVersionString() {
 104         return nullToEmptyString(fVersion.toString());
 105     }
 106
 107     @Override
 108     public LttngVersion getVersion() {
 109         return fVersion;
 110     }
 111
 112     /**
 113      * Sets the version of the LTTng 2.0 control service.
 114      *
 115      * @param version
 116      *            - a version to set
 117      */
 118     public void setVersion(@Nullable String version) {
 119         if (version != null) {
 120             fVersion = new LttngVersion(version);
 121         }
 122     }
 123
 124     /**
 125      * Sets the version of the LTTng 2.x control service.
 126      *
 127      * @param version
 128      *            - a version to set
 129      */
 130     protected void setVersion(LttngVersion version) {
 131         if (version != null) {
 132             fVersion = version;
 133         }
 134     }
 135
 136     @Override
 137     public boolean isVersionSupported(String version) {
 138         LttngVersion tmp = new LttngVersion(version);
 139         return (fVersion.compareTo(tmp) >= 0) ? true : false;
 140     }
 141
 142     /**
 143      * Returns the command shell implementation.
 144      *
 145      * @return the command shell implementation
 146      */
 147     protected ICommandShell getCommandShell() {
 148         return fCommandShell;
 149     }
 150
 151     // ------------------------------------------------------------------------
 152     // Operations
 153     // ------------------------------------------------------------------------
 154
 155     @Override
 156     public List<String> getSessionNames(IProgressMonitor monitor) throws ExecutionException {
 157         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_LIST);
 158
 159         ICommandResult result = executeCommand(command, monitor);
 160
 161         // Output:
 162         // Available tracing sessions:
 163         // 1) mysession1 (/home/user/lttng-traces/mysession1-20120123-083928)
 164         // [inactive]
 165         // 2) mysession (/home/user/lttng-traces/mysession-20120123-083318)
 166         // [inactive]
 167         //
 168         // Use lttng list <session_name> for more details
 169
 170         ArrayList<String> retArray = new ArrayList<>();
 171         for (String line : result.getOutput()) {
 172             Matcher matcher = LTTngControlServiceConstants.SESSION_PATTERN.matcher(line);
 173             if (matcher.matches()) {
 174                 retArray.add(matcher.group(2).trim());
 175             }
 176         }
 177         return retArray;
 178     }
 179
 180     /**
 181      * Check if there is a pattern to be ignored into a sequence of string
 182      *
 183      * @param input
 184      *            an input list of Strings
 185      * @param pattern
 186      *            the pattern to search for
 187      * @return if the pattern exist in the array of string
 188      */
 189     protected boolean ignoredPattern(List<String> input, Pattern pattern) {
 190         for (String line : input) {
 191             Matcher matcher = pattern.matcher(line);
 192             if (matcher.matches()) {
 193                 return true;
 194             }
 195         }
 196         return false;
 197     }
 198
 199     @Override
 200     public ISessionInfo getSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 201         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_LIST, sessionName);
 202         ICommandResult result = executeCommand(command, monitor);
 203
 204         int index = 0;
 205
 206         // Output:
 207         // Tracing session mysession2: [inactive]
 208         // Trace path: /home/eedbhu/lttng-traces/mysession2-20120123-110330
 209         ISessionInfo sessionInfo = new SessionInfo(sessionName);
 210
 211         while (index < result.getOutput().size()) {
 212             // Tracing session mysession2: [inactive]
 213             // Trace path: /home/eedbhu/lttng-traces/mysession2-20120123-110330
 214             //
 215             // === Domain: Kernel ===
 216             //
 217             String line = result.getOutput().get(index);
 218             Matcher matcher = LTTngControlServiceConstants.TRACE_SESSION_PATTERN.matcher(line);
 219             if (matcher.matches()) {
 220                 sessionInfo.setSessionState(matcher.group(2));
 221                 index++;
 222                 continue;
 223             }
 224
 225             matcher = LTTngControlServiceConstants.TRACE_SNAPSHOT_SESSION_PATTERN.matcher(line);
 226             if (matcher.matches()) {
 227                 sessionInfo.setSessionState(matcher.group(2));
 228                 // real name will be set later
 229                 ISnapshotInfo snapshotInfo = new SnapshotInfo(""); //$NON-NLS-1$
 230                 sessionInfo.setSnapshotInfo(snapshotInfo);
 231                 index++;
 232                 continue;
 233             }
 234
 235             if (!sessionInfo.isSnapshotSession()) {
 236                 matcher = LTTngControlServiceConstants.TRACE_NETWORK_PATH_PATTERN.matcher(line);
 237                 if (matcher.matches()) {
 238                     sessionInfo.setStreamedTrace(true);
 239                 }
 240
 241                 matcher = LTTngControlServiceConstants.TRACE_SESSION_PATH_PATTERN.matcher(line);
 242                 if (matcher.matches()) {
 243                     sessionInfo.setSessionPath(matcher.group(1).trim());
 244                     index++;
 245                     continue;
 246                 }
 247             }
 248
 249             matcher = LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(line);
 250             if (matcher.matches()) {
 251                 // Create Domain
 252                 IDomainInfo domainInfo = new DomainInfo(Messages.TraceControl_KernelDomainDisplayName);
 253
 254                 // set kernel flag
 255                 domainInfo.setIsKernel(true);
 256
 257                 // in domain kernel
 258                 ArrayList<IChannelInfo> channels = new ArrayList<>();
 259                 index = parseDomain(result.getOutput(), index, channels, domainInfo);
 260
 261                 if (channels.size() > 0) {
 262                     // add domain
 263                     sessionInfo.addDomain(domainInfo);
 264
 265                     // set channels
 266                     domainInfo.setChannels(channels);
 267                 }
 268                 continue;
 269             }
 270
 271             matcher = LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(line);
 272             if (matcher.matches()) {
 273                 IDomainInfo domainInfo = new DomainInfo(Messages.TraceControl_UstGlobalDomainDisplayName);
 274
 275                 // set kernel flag
 276                 domainInfo.setIsKernel(false);
 277
 278                 // in domain UST
 279                 ArrayList<IChannelInfo> channels = new ArrayList<>();
 280                 index = parseDomain(result.getOutput(), index, channels, domainInfo);
 281
 282                 if (channels.size() > 0) {
 283                     // add domain
 284                     sessionInfo.addDomain(domainInfo);
 285
 286                     // set channels
 287                     domainInfo.setChannels(channels);
 288                 }
 289                 continue;
 290             }
 291             matcher = LTTngControlServiceConstants.LIST_LIVE_TIMER_INTERVAL_PATTERN.matcher(line);
 292             if (matcher.matches()) {
 293                 long liveDelay = Long.parseLong(matcher.group(1));
 294                 if ((liveDelay > 0) && (liveDelay <= LTTngControlServiceConstants.MAX_LIVE_TIMER_INTERVAL)) {
 295                     sessionInfo.setLive(true);
 296                     sessionInfo.setLiveUrl(SessionInfo.DEFAULT_LIVE_NETWORK_URL);
 297                     sessionInfo.setLivePort(SessionInfo.DEFAULT_LIVE_PORT);
 298                     sessionInfo.setLiveDelay(liveDelay);
 299                 }
 300                 index++;
 301                 continue;
 302             }
 303
 304             index++;
 305         }
 306
 307         if (sessionInfo.isSnapshotSession()) {
 308             ISnapshotInfo snapshot = getSnapshotInfo(sessionName, monitor);
 309             sessionInfo.setSnapshotInfo(snapshot);
 310         }
 311
 312         return sessionInfo;
 313     }
 314
 315     @Override
 316     public ISnapshotInfo getSnapshotInfo(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 317         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_SNAPSHOT, LTTngControlServiceConstants.COMMAND_LIST_SNAPSHOT_OUTPUT, LTTngControlServiceConstants.OPTION_SESSION, sessionName);
 318         ICommandResult result = executeCommand(command, monitor);
 319
 320         int index = 0;
 321
 322         // Output:
 323         // [1] snapshot-1: /home/user/lttng-traces/my-20130909-114431
 324         // or
 325         // [3] snapshot-3: net4://172.0.0.1/
 326         ISnapshotInfo snapshotInfo = new SnapshotInfo(""); //$NON-NLS-1$
 327
 328         while (index < result.getOutput().size()) {
 329             String line = result.getOutput().get(index);
 330             Matcher matcher = LTTngControlServiceConstants.LIST_SNAPSHOT_OUTPUT_PATTERN.matcher(line);
 331             if (matcher.matches()) {
 332                 snapshotInfo.setId(Integer.valueOf(matcher.group(1)));
 333                 snapshotInfo.setName(matcher.group(2));
 334                 snapshotInfo.setSnapshotPath(matcher.group(3));
 335
 336                 Matcher matcher2 = LTTngControlServiceConstants.SNAPSHOT_NETWORK_PATH_PATTERN.matcher(snapshotInfo.getSnapshotPath());
 337                 if (matcher2.matches()) {
 338                     snapshotInfo.setStreamedSnapshot(true);
 339                 }
 340
 341                 index++;
 342                 break;
 343             }
 344             index++;
 345         }
 346
 347         return snapshotInfo;
 348     }
 349
 350     @Override
 351     public List<IBaseEventInfo> getKernelProvider(IProgressMonitor monitor) throws ExecutionException {
 352         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_LIST, LTTngControlServiceConstants.OPTION_KERNEL);
 353         ICommandResult result = executeCommand(command, monitor, false);
 354
 355         List<IBaseEventInfo> events = new ArrayList<>();
 356
 357         // Ignore the following 2 cases:
 358         // Spawning a session daemon
 359         // Error: Unable to list kernel events
 360         // or:
 361         // Error: Unable to list kernel events
 362         //
 363         if (ignoredPattern(result.getErrorOutput(), LTTngControlServiceConstants.LIST_KERNEL_NO_KERNEL_PROVIDER_PATTERN)) {
 364             return events;
 365         }
 366
 367         if (isError(result)) {
 368             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
 369         }
 370
 371         // Kernel events:
 372         // -------------
 373         // sched_kthread_stop (type: tracepoint)
 374         getProviderEventInfo(result.getOutput(), 0, events);
 375         return events;
 376     }
 377
 378     @Override
 379     public List<IUstProviderInfo> getUstProvider() throws ExecutionException {
 380         return getUstProvider(new NullProgressMonitor());
 381     }
 382
 383     @Override
 384     public List<IUstProviderInfo> getUstProvider(IProgressMonitor monitor) throws ExecutionException {
 385         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_LIST, LTTngControlServiceConstants.OPTION_UST);
 386
 387         if (isVersionSupported("2.1.0")) { //$NON-NLS-1$
 388             command.add(LTTngControlServiceConstants.OPTION_FIELDS);
 389         }
 390
 391         ICommandResult result = executeCommand(command, monitor, false);
 392         List<IUstProviderInfo> allProviders = new ArrayList<>();
 393
 394         // Workaround for versions 2.0.x which causes a segmentation fault for
 395         // this command
 396         // if LTTng Tools is compiled without UST support.
 397         if (!isVersionSupported("2.1.0") && (result.getResult() != 0)) { //$NON-NLS-1$
 398             return allProviders;
 399         }
 400
 401         // Ignore the following 2 cases:
 402         // Spawning a session daemon
 403         // Error: Unable to list UST events: Listing UST events failed
 404         // or:
 405         // Error: Unable to list UST events: Listing UST events failed
 406         //
 407         if (ignoredPattern(result.getErrorOutput(), LTTngControlServiceConstants.LIST_UST_NO_UST_PROVIDER_PATTERN)) {
 408             return allProviders;
 409         }
 410
 411         if (isError(result)) {
 412             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
 413         }
 414
 415         // Note that field print-outs exists for version >= 2.1.0
 416         //
 417         // UST events:
 418         // -------------
 419         //
 420         // PID: 3635 - Name:
 421         // /home/user/git/lttng-ust/tests/hello.cxx/.libs/lt-hello
 422         // ust_tests_hello:tptest_sighandler (loglevel: TRACE_EMERG0) (type:
 423         // tracepoint)
 424         // ust_tests_hello:tptest (loglevel: TRACE_EMERG0) (type: tracepoint)
 425         // field: doublefield (float)
 426         // field: floatfield (float)
 427         // field: stringfield (string)
 428         //
 429         // PID: 6459 - Name:
 430         // /home/user/git/lttng-ust/tests/hello.cxx/.libs/lt-hello
 431         // ust_tests_hello:tptest_sighandler (loglevel: TRACE_EMERG0) (type:
 432         // tracepoint)
 433         // ust_tests_hello:tptest (loglevel: TRACE_EMERG0) (type: tracepoint)
 434         // field: doublefield (float)
 435         // field: floatfield (float)
 436         // field: stringfield (string)
 437
 438         IUstProviderInfo provider = null;
 439
 440         int index = 0;
 441         while (index < result.getOutput().size()) {
 442             String line = result.getOutput().get(index);
 443             Matcher matcher = LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line);
 444             if (matcher.matches()) {
 445                 provider = new UstProviderInfo(matcher.group(2).trim());
 446                 provider.setPid(Integer.valueOf(matcher.group(1).trim()));
 447                 List<IBaseEventInfo> events = new ArrayList<>();
 448                 index = getProviderEventInfo(result.getOutput(), ++index, events);
 449                 provider.setEvents(events);
 450                 allProviders.add(provider);
 451             } else {
 452                 index++;
 453             }
 454         }
 455         return allProviders;
 456     }
 457
 458     @Override
 459     public ISessionInfo createSession(ISessionInfo sessionInfo, IProgressMonitor monitor) throws ExecutionException {
 460         if (sessionInfo.isStreamedTrace()) {
 461             return createStreamedSession(sessionInfo, monitor);
 462         }
 463
 464         ICommandInput command = prepareSessionCreationCommand(sessionInfo);
 465
 466         ICommandResult result = executeCommand(command, monitor);
 467
 468         // Session myssession2 created.
 469         // Traces will be written in
 470         // /home/user/lttng-traces/myssession2-20120209-095418
 471         List<String> output = result.getOutput();
 472
 473         // Get and session name and path
 474         String name = null;
 475         String path = null;
 476
 477         for (String line : output) {
 478             Matcher nameMatcher = LTTngControlServiceConstants.CREATE_SESSION_NAME_PATTERN.matcher(line);
 479             Matcher pathMatcher = LTTngControlServiceConstants.CREATE_SESSION_PATH_PATTERN.matcher(line);
 480             if (nameMatcher.matches()) {
 481                 name = String.valueOf(nameMatcher.group(1).trim());
 482             } else if (pathMatcher.matches()) {
 483                 path = String.valueOf(pathMatcher.group(1).trim());
 484             }
 485         }
 486
 487         // Verify session name
 488         if ((name == null) || (!"".equals(sessionInfo.getName()) && !name.equals(sessionInfo.getName()))) { //$NON-NLS-1$
 489             // Unexpected name returned
 490             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 491                     Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$
 492         }
 493
 494         sessionInfo.setName(name);
 495         // Verify session path
 496         if (!sessionInfo.isSnapshotSession() &&
 497                 ((path == null) || ((sessionInfo.getSessionPath() != null) && (!path.contains(sessionInfo.getSessionPath()))))) {
 498             // Unexpected path
 499             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 500                     Messages.TraceControl_UnexpectedPathError + ": " + name); //$NON-NLS-1$
 501         }
 502
 503         if (sessionInfo.isSnapshotSession()) {
 504             // Make it a snapshot session - content of snapshot info need to
 505             // set afterwards using getSession() or getSnapshotInfo()
 506             sessionInfo.setSnapshotInfo(new SnapshotInfo("")); //$NON-NLS-1$
 507         } else {
 508             sessionInfo.setSessionPath(path);
 509         }
 510
 511         return sessionInfo;
 512
 513     }
 514
 515     /**
 516      * Basic generation of command for session creation
 517      *
 518      * @param sessionInfo
 519      *            the session to create
 520      * @return the basic command for command creation
 521      */
 522     protected @NonNull ICommandInput prepareSessionCreationCommand(ISessionInfo sessionInfo) {
 523         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_CREATE_SESSION);
 524         if (!sessionInfo.getName().isEmpty()) {
 525             command.add(sessionInfo.getName());
 526         }
 527
 528         String newPath = sessionInfo.getSessionPath();
 529         if (newPath != null && !"".equals(newPath)) { //$NON-NLS-1$
 530             command.add(LTTngControlServiceConstants.OPTION_OUTPUT_PATH);
 531             command.add(newPath);
 532         }
 533
 534         if (sessionInfo.isSnapshotSession()) {
 535             command.add(LTTngControlServiceConstants.OPTION_SNAPSHOT);
 536         }
 537         return command;
 538     }
 539
 540     private @NonNull ISessionInfo createStreamedSession(ISessionInfo sessionInfo, IProgressMonitor monitor) throws ExecutionException {
 541
 542         ICommandInput command = prepareStreamedSessionCreationCommand(sessionInfo);
 543
 544         ICommandResult result = executeCommand(command, monitor);
 545
 546         // Verify output
 547         List<String> output = result.getOutput();
 548
 549         // Get and session name and path
 550         String name = null;
 551         String path = null;
 552
 553         for (String line : output) {
 554             Matcher nameMatcher = LTTngControlServiceConstants.CREATE_SESSION_NAME_PATTERN.matcher(line);
 555             Matcher pathMatcher = LTTngControlServiceConstants.CREATE_SESSION_PATH_PATTERN.matcher(line);
 556
 557             if (nameMatcher.matches()) {
 558                 name = String.valueOf(nameMatcher.group(1).trim());
 559             } else if (pathMatcher.matches() && (sessionInfo.getNetworkUrl() != null)) {
 560                 path = String.valueOf(pathMatcher.group(1).trim());
 561             }
 562         }
 563
 564         // Verify session name
 565         if ((name == null) || (!"".equals(sessionInfo.getName()) && !name.equals(sessionInfo.getName()))) { //$NON-NLS-1$
 566             // Unexpected name returned
 567             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 568                     Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$
 569         }
 570
 571         sessionInfo.setName(name);
 572
 573         sessionInfo.setStreamedTrace(true);
 574
 575         // Verify session path
 576         if (sessionInfo.getNetworkUrl() != null) {
 577             if (!sessionInfo.isSnapshotSession() && (path == null)) {
 578                 // Unexpected path
 579                 throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 580                         Messages.TraceControl_UnexpectedPathError + ": " + name); //$NON-NLS-1$
 581             }
 582
 583             if (sessionInfo.isSnapshotSession()) {
 584                 sessionInfo.setStreamedTrace(false);
 585             } else {
 586                 sessionInfo.setSessionPath(path);
 587                 // Check file protocol
 588                 Matcher matcher = LTTngControlServiceConstants.TRACE_FILE_PROTOCOL_PATTERN.matcher(path);
 589                 if (matcher.matches()) {
 590                     sessionInfo.setStreamedTrace(false);
 591                 }
 592             }
 593         }
 594
 595         // When using controlUrl and dataUrl the full session path is not known
 596         // yet and will be set later on when listing the session
 597
 598         return sessionInfo;
 599     }
 600
 601     /**
 602      * Basic generation of command for streamed session creation
 603      *
 604      * @param sessionInfo
 605      *            the session to create
 606      * @return the basic command for command creation
 607      */
 608     protected @NonNull ICommandInput prepareStreamedSessionCreationCommand(ISessionInfo sessionInfo) {
 609         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_CREATE_SESSION);
 610         if (!sessionInfo.getName().isEmpty()) {
 611             command.add(sessionInfo.getName());
 612         }
 613
 614         if (sessionInfo.isSnapshotSession()) {
 615             command.add(LTTngControlServiceConstants.OPTION_SNAPSHOT);
 616         } else if (sessionInfo.isLive()) {
 617             command.add(LTTngControlServiceConstants.OPTION_LIVE);
 618             if (sessionInfo.getLiveDelay() != LTTngControlServiceConstants.UNUSED_VALUE) {
 619                 command.add(String.valueOf(sessionInfo.getLiveDelay()));
 620             }
 621         }
 622
 623         if (sessionInfo.getNetworkUrl() != null) {
 624             command.add(LTTngControlServiceConstants.OPTION_NETWORK_URL);
 625             command.add(sessionInfo.getNetworkUrl());
 626         } else {
 627             command.add(LTTngControlServiceConstants.OPTION_CONTROL_URL);
 628             command.add(sessionInfo.getControlUrl());
 629
 630             command.add(LTTngControlServiceConstants.OPTION_DATA_URL);
 631             command.add(sessionInfo.getDataUrl());
 632         }
 633         return command;
 634     }
 635
 636     @Override
 637     public void destroySession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 638
 639         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_DESTROY_SESSION, sessionName);
 640
 641         ICommandResult result = executeCommand(command, monitor, false);
 642         boolean isError = isError(result);
 643         if (isError && !ignoredPattern(result.getErrorOutput(), LTTngControlServiceConstants.SESSION_NOT_FOUND_ERROR_PATTERN)) {
 644             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
 645         }
 646
 647         // Session <sessionName> destroyed
 648     }
 649
 650     @Override
 651     public void startSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 652
 653         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_START_SESSION, sessionName);
 654
 655         executeCommand(command, monitor);
 656
 657         // Session <sessionName> started
 658     }
 659
 660     @Override
 661     public void stopSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 662         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_STOP_SESSION, sessionName);
 663
 664         executeCommand(command, monitor);
 665
 666         // Session <sessionName> stopped
 667
 668     }
 669
 670     @Override
 671     public void enableChannels(String sessionName, List<String> channelNames, boolean isKernel, IChannelInfo info, IProgressMonitor monitor) throws ExecutionException {
 672
 673         // no channels to enable
 674         if (channelNames.isEmpty()) {
 675             return;
 676         }
 677
 678         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_CHANNEL);
 679
 680         command.add(toCsv(channelNames));
 681
 682         if (isKernel) {
 683             command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 684         } else {
 685             command.add(LTTngControlServiceConstants.OPTION_UST);
 686         }
 687
 688         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 689         command.add(sessionName);
 690
 691         if (info != null) {
 692             // --discard Discard event when buffers are full (default)
 693
 694             // --overwrite Flight recorder mode
 695             if (info.isOverwriteMode()) {
 696                 command.add(LTTngControlServiceConstants.OPTION_OVERWRITE);
 697             }
 698             // --subbuf-size SIZE Subbuffer size in bytes
 699             // (default: 4096, kernel default: 262144)
 700             if (info.getSubBufferSize() != LTTngControlServiceConstants.UNUSED_VALUE) {
 701                 command.add(LTTngControlServiceConstants.OPTION_SUB_BUFFER_SIZE);
 702                 command.add(String.valueOf(info.getSubBufferSize()));
 703             }
 704
 705             // --num-subbuf NUM Number of subbufers
 706             if (info.getNumberOfSubBuffers() != LTTngControlServiceConstants.UNUSED_VALUE) {
 707                 command.add(LTTngControlServiceConstants.OPTION_NUM_SUB_BUFFERS);
 708                 command.add(String.valueOf(info.getNumberOfSubBuffers()));
 709             }
 710
 711             // --switch-timer USEC Switch timer interval in usec
 712             if (info.getSwitchTimer() != LTTngControlServiceConstants.UNUSED_VALUE) {
 713                 command.add(LTTngControlServiceConstants.OPTION_SWITCH_TIMER);
 714                 command.add(String.valueOf(info.getSwitchTimer()));
 715             }
 716
 717             // --read-timer USEC Read timer interval in usec
 718             if (info.getReadTimer() != LTTngControlServiceConstants.UNUSED_VALUE) {
 719                 command.add(LTTngControlServiceConstants.OPTION_READ_TIMER);
 720                 command.add(String.valueOf(info.getReadTimer()));
 721             }
 722
 723             if (isVersionSupported("2.2.0")) { //$NON-NLS-1$
 724                 // --buffers-uid Every application sharing the same UID use the
 725                 // same buffers --buffers-pid Buffers are allocated per PID
 726                 if (!isKernel) {
 727                     if (info.getBufferType() == BufferType.BUFFER_PER_PID) {
 728                         command.add(LTTngControlServiceConstants.OPTION_PER_PID_BUFFERS);
 729
 730                     } else if (info.getBufferType() == BufferType.BUFFER_PER_UID) {
 731                         command.add(LTTngControlServiceConstants.OPTION_PER_UID_BUFFERS);
 732                     }
 733                 }
 734
 735                 // -C SIZE Maximum size of trace files in bytes
 736                 if (info.getMaxSizeTraceFiles() != LTTngControlServiceConstants.UNUSED_VALUE) {
 737                     command.add(LTTngControlServiceConstants.OPTION_MAX_SIZE_TRACE_FILES);
 738                     command.add(String.valueOf(info.getMaxSizeTraceFiles()));
 739                 }
 740
 741                 // -W NUM Maximum number of trace files
 742                 if (info.getMaxNumberTraceFiles() != LTTngControlServiceConstants.UNUSED_VALUE) {
 743                     command.add(LTTngControlServiceConstants.OPTION_MAX_TRACE_FILES);
 744                     command.add(String.valueOf(info.getMaxNumberTraceFiles()));
 745                 }
 746             }
 747         }
 748
 749         executeCommand(command, monitor);
 750
 751     }
 752
 753     @Override
 754     public void disableChannels(String sessionName, List<String> channelNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
 755
 756         // no channels to enable
 757         if (channelNames.isEmpty()) {
 758             return;
 759         }
 760
 761         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_DISABLE_CHANNEL);
 762
 763         command.add(toCsv(channelNames));
 764
 765         if (isKernel) {
 766             command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 767         } else {
 768             command.add(LTTngControlServiceConstants.OPTION_UST);
 769         }
 770
 771         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 772         command.add(sessionName);
 773
 774         executeCommand(command, monitor);
 775     }
 776
 777     @Override
 778     public void enableEvents(String sessionName, String channelName, List<String> eventNames, boolean isKernel, String filterExpression, List<String> excludedEvents, IProgressMonitor monitor) throws ExecutionException {
 779
 780         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 781         boolean isAllEvents = ALL_EVENTS.equals(eventNames);
 782
 783         if (isAllEvents || (eventNames == null) || (eventNames.isEmpty())) {
 784             command.add(LTTngControlServiceConstants.OPTION_ALL);
 785         } else {
 786             command.add(toCsv(eventNames));
 787         }
 788
 789         if (isKernel) {
 790             command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 791         } else {
 792             command.add(LTTngControlServiceConstants.OPTION_UST);
 793         }
 794
 795         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 796         command.add(sessionName);
 797
 798         if (channelName != null) {
 799             command.add(LTTngControlServiceConstants.OPTION_CHANNEL);
 800             command.add(channelName);
 801         }
 802
 803         if (!isAllEvents) {
 804             command.add(LTTngControlServiceConstants.OPTION_TRACEPOINT);
 805         }
 806
 807         if (filterExpression != null) {
 808             command.add(LTTngControlServiceConstants.OPTION_FILTER);
 809             command.add(filterExpression);
 810         }
 811
 812         if (excludedEvents != null && !excludedEvents.isEmpty()) {
 813             command.add(LTTngControlServiceConstants.OPTION_EXCLUDE);
 814             command.add(toCsv(excludedEvents));
 815         }
 816
 817         executeCommand(command, monitor);
 818     }
 819
 820     @Override
 821     public void enableSyscalls(String sessionName, String channelName, IProgressMonitor monitor) throws ExecutionException {
 822
 823         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 824
 825         command.add(LTTngControlServiceConstants.OPTION_ALL);
 826         command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 827
 828         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 829         command.add(sessionName);
 830
 831         if (channelName != null) {
 832             command.add(LTTngControlServiceConstants.OPTION_CHANNEL);
 833             command.add(channelName);
 834         }
 835
 836         command.add(LTTngControlServiceConstants.OPTION_SYSCALL);
 837
 838         executeCommand(command, monitor);
 839     }
 840
 841     @Override
 842     public void enableProbe(String sessionName, String channelName, String eventName, boolean isFunction, String probe, IProgressMonitor monitor) throws ExecutionException {
 843         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 844
 845         command.add(eventName);
 846         command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 847
 848         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 849         command.add(sessionName);
 850
 851         if (channelName != null) {
 852             command.add(LTTngControlServiceConstants.OPTION_CHANNEL);
 853             command.add(channelName);
 854         }
 855         if (isFunction) {
 856             command.add(LTTngControlServiceConstants.OPTION_FUNCTION_PROBE);
 857         } else {
 858             command.add(LTTngControlServiceConstants.OPTION_PROBE);
 859         }
 860
 861         command.add(probe);
 862
 863         executeCommand(command, monitor);
 864     }
 865
 866     @Override
 867     public void enableLogLevel(String sessionName, String channelName, String eventName, LogLevelType logLevelType, TraceLogLevel level, String filterExpression, IProgressMonitor monitor) throws ExecutionException {
 868         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 869
 870         command.add(eventName);
 871         command.add(LTTngControlServiceConstants.OPTION_UST);
 872
 873         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 874         command.add(sessionName);
 875
 876         if (channelName != null) {
 877             command.add(LTTngControlServiceConstants.OPTION_CHANNEL);
 878             command.add(channelName);
 879         }
 880
 881         if (logLevelType == LogLevelType.LOGLEVEL) {
 882             command.add(LTTngControlServiceConstants.OPTION_LOGLEVEL);
 883         } else if (logLevelType == LogLevelType.LOGLEVEL_ONLY) {
 884             command.add(LTTngControlServiceConstants.OPTION_LOGLEVEL_ONLY);
 885
 886         } else {
 887             return;
 888         }
 889         command.add(level.getInName());
 890
 891         executeCommand(command, monitor);
 892     }
 893
 894     @Override
 895     public void disableEvent(String sessionName, String channelName, List<String> eventNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
 896         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_DISABLE_EVENT);
 897
 898         if (eventNames == null) {
 899             command.add(LTTngControlServiceConstants.OPTION_ALL);
 900         } else {
 901             // no events to disable
 902             if (eventNames.isEmpty()) {
 903                 return;
 904             }
 905
 906             StringBuffer eventNameParameter = new StringBuffer();
 907             for (Iterator<String> iterator = eventNames.iterator(); iterator.hasNext();) {
 908                 String event = iterator.next();
 909                 eventNameParameter.append(event);
 910                 if (iterator.hasNext()) {
 911                     eventNameParameter.append(',');
 912                 }
 913             }
 914             command.add(eventNameParameter.toString());
 915         }
 916
 917         if (isKernel) {
 918             command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 919         } else {
 920             command.add(LTTngControlServiceConstants.OPTION_UST);
 921         }
 922
 923         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 924         command.add(sessionName);
 925
 926         if (channelName != null) {
 927             command.add(LTTngControlServiceConstants.OPTION_CHANNEL);
 928             command.add(channelName);
 929         }
 930
 931         executeCommand(command, monitor);
 932     }
 933
 934     @Override
 935     public List<String> getContextList(IProgressMonitor monitor) throws ExecutionException {
 936
 937         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ADD_CONTEXT, LTTngControlServiceConstants.OPTION_HELP);
 938
 939         ICommandResult result = executeCommand(command, monitor);
 940
 941         List<String> output = result.getOutput();
 942
 943         List<String> contexts = new ArrayList<>(0);
 944
 945         int index = 0;
 946         boolean inList = false;
 947         while (index < output.size()) {
 948             String line = output.get(index);
 949
 950             Matcher startMatcher = LTTngControlServiceConstants.ADD_CONTEXT_HELP_CONTEXTS_INTRO.matcher(line);
 951             Matcher endMatcher = LTTngControlServiceConstants.ADD_CONTEXT_HELP_CONTEXTS_END_LINE.matcher(line);
 952
 953             if (startMatcher.matches()) {
 954                 inList = true;
 955             } else if (endMatcher.matches()) {
 956                 break;
 957             } else if (inList) {
 958                 String[] tmp = line.split(","); //$NON-NLS-1$
 959                 for (int i = 0; i < tmp.length; i++) {
 960                     contexts.add(tmp[i].trim());
 961                 }
 962             }
 963             index++;
 964         }
 965         return contexts;
 966     }
 967
 968     @Override
 969     public void addContexts(String sessionName, String channelName, String eventName, boolean isKernel, List<String> contextNames, IProgressMonitor monitor) throws ExecutionException {
 970         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_ADD_CONTEXT);
 971
 972         command.add(LTTngControlServiceConstants.OPTION_SESSION);
 973         command.add(sessionName);
 974
 975         if (channelName != null) {
 976             command.add(LTTngControlServiceConstants.OPTION_CHANNEL);
 977             command.add(channelName);
 978         }
 979
 980         if (eventName != null) {
 981             command.add(LTTngControlServiceConstants.OPTION_EVENT);
 982             command.add(eventName);
 983         }
 984
 985         if (isKernel) {
 986             command.add(LTTngControlServiceConstants.OPTION_KERNEL);
 987         } else {
 988             command.add(LTTngControlServiceConstants.OPTION_UST);
 989         }
 990
 991         for (Iterator<String> iterator = contextNames.iterator(); iterator.hasNext();) {
 992             String context = iterator.next();
 993             command.add(LTTngControlServiceConstants.OPTION_CONTEXT_TYPE);
 994             command.add(context);
 995         }
 996
 997         executeCommand(command, monitor);
 998
 999     }
1000
1001     @Override
1002     public void recordSnapshot(String sessionName, IProgressMonitor monitor)
1003             throws ExecutionException {
1004         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_SNAPSHOT, LTTngControlServiceConstants.COMMAND_RECORD_SNAPSHOT);
1005
1006         String newSessionName = sessionName;
1007         command.add(LTTngControlServiceConstants.OPTION_SESSION);
1008         command.add(newSessionName);
1009
1010         executeCommand(command, monitor);
1011     }
1012
1013     @Override
1014     public void loadSession(String inputPath, boolean isForce, IProgressMonitor monitor)
1015             throws ExecutionException {
1016         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_LOAD_SESSION);
1017
1018         if (inputPath != null) {
1019             command.add(LTTngControlServiceConstants.OPTION_INPUT_PATH);
1020             command.add(inputPath);
1021         }
1022
1023         if (isForce) {
1024             command.add(LTTngControlServiceConstants.OPTION_FORCE);
1025         }
1026         executeCommand(command, monitor);
1027     }
1028
1029     @Override
1030     public void saveSession(String session, String outputPath, boolean isForce, IProgressMonitor monitor) throws ExecutionException {
1031         ICommandInput command = createCommand(LTTngControlServiceConstants.COMMAND_SAVE_SESSION);
1032
1033         if (outputPath != null) {
1034             command.add(LTTngControlServiceConstants.OPTION_OUTPUT_PATH);
1035             command.add(outputPath);
1036         }
1037
1038         if (isForce) {
1039             command.add(LTTngControlServiceConstants.OPTION_FORCE);
1040         }
1041
1042         if (session != null) {
1043             command.add(session);
1044         }
1045         executeCommand(command, monitor);
1046     }
1047
1048     @Override
1049     public void runCommands(IProgressMonitor monitor, List<String> commandLines) throws ExecutionException {
1050         for (String commandLine : commandLines) {
1051             if (monitor.isCanceled()) {
1052                 return;
1053             }
1054
1055             if (commandLine.isEmpty() || commandLine.startsWith("#")) { //$NON-NLS-1$
1056                 continue;
1057             }
1058             String[] args = commandLine.split("\\s+"); //$NON-NLS-1$
1059             ICommandInput command = fCommandShell.createCommand();
1060             command.addAll(Arrays.asList(args));
1061             ICommandResult result = executeCommand(command, monitor);
1062
1063             if (isError(result)) {
1064                 throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
1065             }
1066         }
1067     }
1068
1069     // ------------------------------------------------------------------------
1070     // Helper methods
1071     // ------------------------------------------------------------------------
1072
1073     /**
1074      * Checks if command result is an error result.
1075      *
1076      * @param result
1077      *            - the command result to check
1078      * @return true if error else false
1079      */
1080     protected boolean isError(ICommandResult result) {
1081         // Check return code and length of returned strings
1082
1083         if ((result.getResult()) != 0) {
1084             return true;
1085         }
1086
1087         // Look for error pattern
1088         for (String line : result.getErrorOutput()) {
1089             Matcher matcher = LTTngControlServiceConstants.ERROR_PATTERN.matcher(line);
1090             if (matcher.matches()) {
1091                 return true;
1092             }
1093         }
1094
1095         return false;
1096     }
1097
1098     /**
1099      * Creates a comma separated string from list of names
1100      *
1101      * @param names
1102      *          List of name to convert
1103      * @return comma separated string
1104      */
1105     protected String toCsv(List<String> names) {
1106         StringBuilder csvString = new StringBuilder();
1107         for (Iterator<String> iterator = names.iterator(); iterator.hasNext();) {
1108             String name = iterator.next();
1109             csvString.append(name);
1110             if (iterator.hasNext()) {
1111                 csvString.append(',');
1112             }
1113         }
1114         return csvString.toString();
1115     }
1116
1117     /**
1118      * Parses the domain information.
1119      *
1120      * @param output
1121      *            a command output list
1122      * @param currentIndex
1123      *            current index in command output list
1124      * @param channels
1125      *            list for returning channel information
1126      * @param domainInfo
1127      *            The domain information
1128      * @return the new current index in command output list
1129      */
1130     protected int parseDomain(List<String> output, int currentIndex, List<IChannelInfo> channels, IDomainInfo domainInfo) {
1131         int index = currentIndex;
1132
1133         // if kernel set the buffer type to shared
1134         if (domainInfo.isKernel()) {
1135             domainInfo.setBufferType(BufferType.BUFFER_SHARED);
1136         }
1137
1138         // Channels:
1139         // -------------
1140         // - channnel1: [enabled]
1141         //
1142         // Attributes:
1143         // overwrite mode: 0
1144         // subbufers size: 262144
1145         // number of subbufers: 4
1146         // switch timer interval: 0
1147         // read timer interval: 200
1148         // output: splice()
1149
1150         while (index < output.size()) {
1151             String line = output.get(index);
1152
1153             if (isVersionSupported("2.2.0")) { //$NON-NLS-1$
1154                 Matcher bufferTypeMatcher = LTTngControlServiceConstants.BUFFER_TYPE_PATTERN.matcher(line);
1155                 if (bufferTypeMatcher.matches()) {
1156                     String bufferTypeString = getAttributeValue(line);
1157                     if (BufferType.BUFFER_PER_PID.getInName().equals(bufferTypeString)) {
1158                         domainInfo.setBufferType(BufferType.BUFFER_PER_PID);
1159                     } else if (BufferType.BUFFER_PER_UID.getInName().equals(bufferTypeString)) {
1160                         domainInfo.setBufferType(BufferType.BUFFER_PER_UID);
1161                     } else {
1162                         domainInfo.setBufferType(BufferType.BUFFER_TYPE_UNKNOWN);
1163                     }
1164                 }
1165             } else {
1166                 domainInfo.setBufferType(BufferType.BUFFER_TYPE_UNKNOWN);
1167             }
1168             Matcher outerMatcher = LTTngControlServiceConstants.CHANNELS_SECTION_PATTERN.matcher(line);
1169             Matcher noKernelChannelMatcher = LTTngControlServiceConstants.DOMAIN_NO_KERNEL_CHANNEL_PATTERN.matcher(line);
1170             Matcher noUstChannelMatcher = LTTngControlServiceConstants.DOMAIN_NO_UST_CHANNEL_PATTERN.matcher(line);
1171             if (outerMatcher.matches()) {
1172                 IChannelInfo channelInfo = null;
1173                 while (index < output.size()) {
1174                     String subLine = output.get(index);
1175
1176                     Matcher innerMatcher = LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(subLine);
1177                     if (innerMatcher.matches()) {
1178                         channelInfo = new ChannelInfo(""); //$NON-NLS-1$
1179                         // get channel name
1180                         channelInfo.setName(innerMatcher.group(1));
1181
1182                         // get channel enablement
1183                         channelInfo.setState(innerMatcher.group(2));
1184
1185                         // set BufferType
1186                         channelInfo.setBufferType(domainInfo.getBufferType());
1187
1188                         // add channel
1189                         channels.add(channelInfo);
1190
1191                     } else if (LTTngControlServiceConstants.OVERWRITE_MODE_ATTRIBUTE.matcher(subLine).matches()) {
1192                         String value = getAttributeValue(subLine);
1193                         if (channelInfo != null) {
1194                             channelInfo.setOverwriteMode(!LTTngControlServiceConstants.OVERWRITE_MODE_ATTRIBUTE_FALSE.equals(value));
1195                         }
1196                     } else if (LTTngControlServiceConstants.SUBBUFFER_SIZE_ATTRIBUTE.matcher(subLine).matches()) {
1197                         if (channelInfo != null) {
1198                             channelInfo.setSubBufferSize(Long.valueOf(getAttributeValue(subLine)));
1199                         }
1200
1201                     } else if (LTTngControlServiceConstants.NUM_SUBBUFFERS_ATTRIBUTE.matcher(subLine).matches()) {
1202                         if (channelInfo != null) {
1203                             channelInfo.setNumberOfSubBuffers(Integer.valueOf(getAttributeValue(subLine)));
1204                         }
1205
1206                     } else if (LTTngControlServiceConstants.SWITCH_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
1207                         if (channelInfo != null) {
1208                             channelInfo.setSwitchTimer(Long.valueOf(getAttributeValue(subLine)));
1209                         }
1210
1211                     } else if (LTTngControlServiceConstants.READ_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
1212                         if (channelInfo != null) {
1213                             channelInfo.setReadTimer(Long.valueOf(getAttributeValue(subLine)));
1214                         }
1215
1216                     } else if (LTTngControlServiceConstants.OUTPUT_ATTRIBUTE.matcher(subLine).matches()) {
1217                         if (channelInfo != null) {
1218                             channelInfo.setOutputType(getAttributeValue(subLine));
1219                         }
1220
1221                     } else if (LTTngControlServiceConstants.TRACE_FILE_COUNT_ATTRIBUTE.matcher(subLine).matches()) {
1222                         if (channelInfo != null) {
1223                             channelInfo.setMaxNumberTraceFiles(Integer.valueOf(getAttributeValue(subLine)));
1224                         }
1225
1226                     } else if (LTTngControlServiceConstants.TRACE_FILE_SIZE_ATTRIBUTE.matcher(subLine).matches()) {
1227                         if (channelInfo != null) {
1228                             channelInfo.setMaxSizeTraceFiles(Long.valueOf(getAttributeValue(subLine)));
1229                         }
1230                     } else if (LTTngControlServiceConstants.EVENT_SECTION_PATTERN.matcher(subLine).matches()) {
1231                         List<IEventInfo> events = new ArrayList<>();
1232                         index = parseEvents(output, index, events);
1233                         if (channelInfo != null) {
1234                             channelInfo.setEvents(events);
1235                         }
1236                         // we want to stay at the current index to be able to
1237                         // exit the domain
1238                         continue;
1239                     } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(subLine).matches()) {
1240                         return index;
1241
1242                     } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(subLine).matches()) {
1243                         return index;
1244                     }
1245                     index++;
1246                 }
1247             } else if (noKernelChannelMatcher.matches() || noUstChannelMatcher.matches()) {
1248                 // domain indicates that no channels were found -> return
1249                 index++;
1250                 return index;
1251             }
1252             index++;
1253         }
1254         return index;
1255     }
1256
1257     /**
1258      * Parses the event information within a domain.
1259      *
1260      * @param output
1261      *            a command output list
1262      * @param currentIndex
1263      *            current index in command output list
1264      * @param events
1265      *            list for returning event information
1266      * @return the new current index in command output list
1267      */
1268     protected int parseEvents(List<String> output, int currentIndex, List<IEventInfo> events) {
1269         int index = currentIndex;
1270
1271         while (index < output.size()) {
1272             String line = output.get(index);
1273             if (LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(line).matches()) {
1274                 // end of channel
1275                 return index;
1276             } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(line).matches()) {
1277                 // end of domain
1278                 return index;
1279             } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(line).matches()) {
1280                 // end of domain
1281                 return index;
1282             }
1283
1284             Matcher matcher = LTTngControlServiceConstants.EVENT_PATTERN.matcher(line);
1285             Matcher matcher2 = LTTngControlServiceConstants.WILDCARD_EVENT_PATTERN.matcher(line);
1286
1287             if (matcher.matches()) {
1288                 IEventInfo eventInfo = new EventInfo(matcher.group(1).trim());
1289                 eventInfo.setLogLevelType(matcher.group(2).trim());
1290                 eventInfo.setLogLevel(matcher.group(3).trim());
1291                 eventInfo.setEventType(matcher.group(4).trim());
1292                 eventInfo.setState(matcher.group(5));
1293                 String filter = matcher.group(6);
1294                 if (filter != null) {
1295                     // remove '[' and ']'
1296                     filter = filter.substring(1, filter.length() - 1);
1297                     eventInfo.setFilterExpression(filter);
1298                 }
1299                 events.add(eventInfo);
1300                 index++;
1301             } else if (matcher2.matches()) {
1302                 IEventInfo eventInfo = new EventInfo(matcher2.group(1).trim());
1303                 eventInfo.setLogLevel(TraceLogLevel.LEVEL_UNKNOWN);
1304                 eventInfo.setEventType(matcher2.group(2).trim());
1305                 eventInfo.setState(matcher2.group(3));
1306                 String filter = matcher2.group(4);
1307                 if (filter != null) {
1308                     // remove '[' and ']'
1309                     filter = filter.substring(1, filter.length() - 1);
1310                     eventInfo.setFilterExpression(filter);
1311                 }
1312
1313                 if ((eventInfo.getEventType() == TraceEventType.PROBE) ||
1314                         (eventInfo.getEventType() == TraceEventType.FUNCTION)) {
1315                     IProbeEventInfo probeEvent = new ProbeEventInfo(eventInfo.getName());
1316                     probeEvent.setLogLevel(eventInfo.getLogLevel());
1317                     probeEvent.setEventType(eventInfo.getEventType());
1318                     probeEvent.setState(eventInfo.getState());
1319
1320                     // Overwrite eventinfo
1321                     eventInfo = probeEvent;
1322
1323                     // myevent2 (type: probe) [enabled]
1324                     // addr: 0xc0101340
1325                     // myevent0 (type: function) [enabled]
1326                     // offset: 0x0
1327                     // symbol: init_post
1328                     index++;
1329                     while (index < output.size()) {
1330                         String probeLine = output.get(index);
1331                         // parse probe
1332                         Matcher addrMatcher = LTTngControlServiceConstants.PROBE_ADDRESS_PATTERN.matcher(probeLine);
1333                         Matcher offsetMatcher = LTTngControlServiceConstants.PROBE_OFFSET_PATTERN.matcher(probeLine);
1334                         Matcher symbolMatcher = LTTngControlServiceConstants.PROBE_SYMBOL_PATTERN.matcher(probeLine);
1335                         if (addrMatcher.matches()) {
1336                             String addr = addrMatcher.group(2).trim();
1337                             probeEvent.setAddress(addr);
1338                         } else if (offsetMatcher.matches()) {
1339                             String offset = offsetMatcher.group(2).trim();
1340                             probeEvent.setOffset(offset);
1341                         } else if (symbolMatcher.matches()) {
1342                             String symbol = symbolMatcher.group(2).trim();
1343                             probeEvent.setSymbol(symbol);
1344                         } else if ((LTTngControlServiceConstants.EVENT_PATTERN.matcher(probeLine).matches()) || (LTTngControlServiceConstants.WILDCARD_EVENT_PATTERN.matcher(probeLine).matches())) {
1345                             break;
1346                         } else if (LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(probeLine).matches()) {
1347                             break;
1348                         } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(probeLine).matches()) {
1349                             // end of domain
1350                             break;
1351                         } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(probeLine).matches()) {
1352                             // end of domain
1353                             break;
1354                         }
1355                         index++;
1356                     }
1357                     events.add(eventInfo);
1358                 } else {
1359                     events.add(eventInfo);
1360                     index++;
1361                     continue;
1362                 }
1363             } else {
1364                 index++;
1365             }
1366         }
1367
1368         return index;
1369     }
1370
1371     /**
1372      * Parses a line with attributes: <attribute Name>: <attribute value>
1373      *
1374      * @param line
1375      *            - attribute line to parse
1376      * @return the attribute value as string
1377      */
1378     protected String getAttributeValue(String line) {
1379         String[] temp = line.split("\\: "); //$NON-NLS-1$
1380         return temp[1];
1381     }
1382
1383     /**
1384      * Parses the event information within a provider.
1385      *
1386      * @param output
1387      *            a command output list
1388      * @param currentIndex
1389      *            current index in command output list
1390      * @param events
1391      *            list for returning event information
1392      * @return the new current index in command output list
1393      */
1394     protected int getProviderEventInfo(List<String> output, int currentIndex, List<IBaseEventInfo> events) {
1395         int index = currentIndex;
1396         IBaseEventInfo eventInfo = null;
1397         while (index < output.size()) {
1398             String line = output.get(index);
1399             Matcher matcher = LTTngControlServiceConstants.PROVIDER_EVENT_PATTERN.matcher(line);
1400             if (matcher.matches()) {
1401                 // sched_kthread_stop (loglevel: TRACE_EMERG0) (type:
1402                 // tracepoint)
1403                 eventInfo = new BaseEventInfo(matcher.group(1).trim());
1404                 eventInfo.setLogLevel(matcher.group(2).trim());
1405                 eventInfo.setEventType(matcher.group(3).trim());
1406                 events.add(eventInfo);
1407                 index++;
1408             } else if (LTTngControlServiceConstants.EVENT_FIELD_PATTERN.matcher(line).matches()) {
1409                 if (eventInfo != null) {
1410                     List<IFieldInfo> fields = new ArrayList<>();
1411                     index = getFieldInfo(output, index, fields);
1412                     eventInfo.setFields(fields);
1413                 } else {
1414                     index++;
1415                 }
1416             } else if (LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line).matches()) {
1417                 return index;
1418             } else {
1419                 index++;
1420             }
1421         }
1422         return index;
1423     }
1424
1425     /**
1426      * Parse a field's information.
1427      *
1428      * @param output
1429      *            A command output list
1430      * @param currentIndex
1431      *            The current index in the command output list
1432      * @param fields
1433      *            List for returning the field information
1434      * @return The new current index in the command output list
1435      */
1436     protected int getFieldInfo(List<String> output, int currentIndex, List<IFieldInfo> fields) {
1437         int index = currentIndex;
1438         IFieldInfo fieldInfo = null;
1439         while (index < output.size()) {
1440             String line = output.get(index);
1441             Matcher matcher = LTTngControlServiceConstants.EVENT_FIELD_PATTERN.matcher(line);
1442             if (matcher.matches()) {
1443                 // field: content (string)
1444                 fieldInfo = new FieldInfo(matcher.group(2).trim());
1445                 fieldInfo.setFieldType(matcher.group(3).trim());
1446                 fields.add(fieldInfo);
1447             } else if (LTTngControlServiceConstants.PROVIDER_EVENT_PATTERN.matcher(line).matches()) {
1448                 return index;
1449             } else if (LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line).matches()) {
1450                 return index;
1451             }
1452             index++;
1453         }
1454         return index;
1455     }
1456
1457     /**
1458      * Creates a command input instance
1459      *
1460      * @param segments
1461      *            array of string that makes up a command line
1462      * @return {@link ICommandInput} instance
1463      */
1464     protected @NonNull ICommandInput createCommand(String... segments) {
1465         ICommandInput command = fCommandShell.createCommand();
1466         command.add(LTTngControlServiceConstants.CONTROL_COMMAND);
1467         List<@NonNull String> groupOption = getTracingGroupOption();
1468         if (!groupOption.isEmpty()) {
1469             command.addAll(groupOption);
1470         }
1471         String verboseOption = getVerboseOption();
1472         if (!verboseOption.isEmpty()) {
1473             command.add(verboseOption);
1474         }
1475         for (String string : segments) {
1476             command.add(checkNotNull(string));
1477         }
1478         return command;
1479     }
1480
1481     /**
1482      * @return the tracing group option if configured in the preferences
1483      */
1484     protected @NonNull List<@NonNull String> getTracingGroupOption() {
1485         List<@NonNull String> groupOption = new ArrayList<>();
1486         if (!ControlPreferences.getInstance().isDefaultTracingGroup() && !ControlPreferences.getInstance().getTracingGroup().equals("")) { //$NON-NLS-1$
1487             groupOption.add(LTTngControlServiceConstants.OPTION_TRACING_GROUP);
1488             groupOption.add(ControlPreferences.getInstance().getTracingGroup());
1489         }
1490         return groupOption;
1491     }
1492
1493     /**
1494      * @return the verbose option as configured in the preferences
1495      */
1496     protected String getVerboseOption() {
1497         if (ControlPreferences.getInstance().isLoggingEnabled()) {
1498             String level = ControlPreferences.getInstance().getVerboseLevel();
1499             if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_VERBOSE.equals(level)) {
1500                 return LTTngControlServiceConstants.OPTION_VERBOSE;
1501             }
1502             if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_V_VERBOSE.equals(level)) {
1503                 return LTTngControlServiceConstants.OPTION_VERY_VERBOSE;
1504             }
1505             if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_V_V_VERBOSE.equals(level)) {
1506                 return LTTngControlServiceConstants.OPTION_VERY_VERY_VERBOSE;
1507             }
1508         }
1509         return ""; //$NON-NLS-1$
1510     }
1511
1512     /**
1513      * Method that logs the command and command result if logging is enabled as
1514      * well as forwards the command execution to the shell.
1515      *
1516      * @param command
1517      *            - the command to execute
1518      * @param monitor
1519      *            - a progress monitor
1520      * @return the command result
1521      * @throws ExecutionException
1522      *             If the command fails
1523      */
1524     protected ICommandResult executeCommand(@NonNull ICommandInput command,
1525             @Nullable IProgressMonitor monitor) throws ExecutionException {
1526         return executeCommand(command, monitor, true);
1527     }
1528
1529     /**
1530      * Method that logs the command and command result if logging is enabled as
1531      * well as forwards the command execution to the shell.
1532      *
1533      * @param command
1534      *            - the command to execute
1535      * @param monitor
1536      *            - a progress monitor
1537      * @param checkForError
1538      *            - true to verify command result, else false
1539      * @return the command result
1540      * @throws ExecutionException
1541      *             in case of error result
1542      */
1543     protected ICommandResult executeCommand(@NonNull ICommandInput command,
1544             @Nullable IProgressMonitor monitor, boolean checkForError)
1545             throws ExecutionException {
1546         if (ControlPreferences.getInstance().isLoggingEnabled()) {
1547             ControlCommandLogger.log(command.toString());
1548         }
1549
1550         ICommandResult result = fCommandShell.executeCommand(command, monitor);
1551
1552         if (ControlPreferences.getInstance().isLoggingEnabled()) {
1553             ControlCommandLogger.log(result.toString());
1554         }
1555
1556         if (checkForError && isError(result)) {
1557             throw new ExecutionException(Messages.TraceControl_CommandError
1558                     + " " + command.toString() + "\n" + result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
1559         }
1560
1561         return result;
1562     }
1563
1564 }