/** Start executing the program. */
  @Execute
  public void stepStartExecution(final RequestMonitor rm) {
    if (fBackend.getSessionType() != SessionType.CORE) {
      // Overwrite the program name to use the binary name that was specified.
      // This is important for multi-process
      // Bug 342351
      fAttributes.put(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, fBinaryName);

      fProcService.start(
          getContainerContext(),
          fAttributes,
          new DataRequestMonitor<IContainerDMContext>(ImmediateExecutor.getInstance(), rm) {
            @Override
            protected void handleSuccess() {
              assert getData() instanceof IMIContainerDMContext;

              // Set the container that we created
              setContainerContext(
                  DMContexts.getAncestorOfType(getData(), IMIContainerDMContext.class));
              fDataRequestMonitor.setData(getContainerContext());

              // Don't call fDataRequestMonitor.done(), the sequence will
              // automatically do that when it completes;
              rm.done();
            }
          });
    } else {
      fDataRequestMonitor.setData(getContainerContext());
      rm.done();
    }
  }
  /**
   * This method does the necessary work to setup the input/output streams for the inferior process,
   * by either preparing the PTY to be used, or by simply leaving the PTY null, which indicates that
   * the input/output streams of the CLI should be used instead; this decision is based on the type
   * of session.
   */
  @Execute
  public void stepInitializeInputOutput(final RequestMonitor rm) {
    if (fBackend.getSessionType() == SessionType.REMOTE && !fBackend.getIsAttachSession()) {
      // Remote non-attach sessions don't support multi-process and therefore will not
      // start new processes.  Those sessions will only start the one process, which should
      // not have a console, because it's output is handled by GDB server.
      fPty = null;
      rm.done();
    } else {
      // Every other type of session that can get to this code, is starting a new process
      // and requires a pty for it.
      try {
        fPty = new PTY();

        // Tell GDB to use this PTY
        fCommandControl.queueCommand(
            fCommandFactory.createMIInferiorTTYSet(
                (IMIContainerDMContext) getContainerContext(), fPty.getSlaveName()),
            new ImmediateDataRequestMonitor<MIInfo>(rm) {
              @Override
              protected void handleFailure() {
                // We were not able to tell GDB to use the PTY
                // so we won't use it at all.
                fPty = null;
                rm.done();
              }
            });
      } catch (IOException e) {
        fPty = null;
        rm.done();
      }
    }
  }
Esempio n. 3
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  /** @return true if supports fetching OS info from /proc pseudo-filesystem */
  private boolean supportsProcPseudoFS() {
    if (Platform.getOS().equals(Platform.OS_LINUX)) return true;

    // for non-linux platform, support only remote (linux? ) targets
    if (SessionType.REMOTE == fBackend.getSessionType()) {
      return true;
    }

    return false;
  }
 /**
  * Start tracking the breakpoints. Note that for remote debugging we should first connect to the
  * target.
  */
 @Execute
 public void stepStartTrackingBreakpoints(RequestMonitor rm) {
   if (fBackend.getSessionType() != SessionType.CORE) {
     MIBreakpointsManager bpmService = fTracker.getService(MIBreakpointsManager.class);
     IBreakpointsTargetDMContext bpTargetDmc =
         DMContexts.getAncestorOfType(getContainerContext(), IBreakpointsTargetDMContext.class);
     bpmService.startTrackingBreakpoints(bpTargetDmc, rm);
   } else {
     rm.done();
   }
 }
 /**
  * This method indicates if we should use the -exec-continue command instead of the -exec-run
  * command. This method can be overridden to allow for customization.
  */
 protected boolean useContinueCommand() {
   // Note that restart does not apply to remote sessions
   IGDBBackend backend = fTracker.getService(IGDBBackend.class);
   if (backend == null) {
     return false;
   }
   // When doing remote non-attach debugging, we use -exec-continue instead of -exec-run
   // For remote attach, if we get here it is that we are starting a new process
   // (multi-process), so we want to use -exec-run
   return backend.getSessionType() == SessionType.REMOTE && !backend.getIsAttachSession();
 }
  /**
   * If we are dealing with a remote debugging session, connect to the target.
   *
   * @since 4.0
   */
  @Execute
  public void stepRemoteConnection(RequestMonitor rm) {
    // If we are dealing with a non-attach remote session, it is now time to connect
    // to the remote side.  Note that this is the 'target remote' case
    // and not the 'target extended-remote' case (remote attach session)
    // This step is actually global for GDB.  However, we have to do it after
    // we have specified the executable, so we have to do it here.
    // It is safe to do it here because a 'target remote' does not support
    // multi-process so this step will not be executed more than once.
    if (fBackend.getSessionType() == SessionType.REMOTE && !fBackend.getIsAttachSession()) {
      boolean isTcpConnection =
          CDebugUtils.getAttribute(
              fAttributes, IGDBLaunchConfigurationConstants.ATTR_REMOTE_TCP, false);

      if (isTcpConnection) {
        String remoteTcpHost =
            CDebugUtils.getAttribute(
                fAttributes, IGDBLaunchConfigurationConstants.ATTR_HOST, INVALID);
        String remoteTcpPort =
            CDebugUtils.getAttribute(
                fAttributes, IGDBLaunchConfigurationConstants.ATTR_PORT, INVALID);

        fCommandControl.queueCommand(
            fCommandFactory.createMITargetSelect(
                fCommandControl.getContext(), remoteTcpHost, remoteTcpPort, false),
            new DataRequestMonitor<MIInfo>(ImmediateExecutor.getInstance(), rm));
      } else {
        String serialDevice =
            CDebugUtils.getAttribute(
                fAttributes, IGDBLaunchConfigurationConstants.ATTR_DEV, INVALID);
        fCommandControl.queueCommand(
            fCommandFactory.createMITargetSelect(fCommandControl.getContext(), serialDevice, false),
            new DataRequestMonitor<MIInfo>(ImmediateExecutor.getInstance(), rm));
      }
    } else {
      rm.done();
    }
  }
  /**
   * If we are dealing with a postmortem session, connect to the core/trace file.
   *
   * @since 4.0
   */
  @Execute
  public void stepSpecifyCoreFile(final RequestMonitor rm) {
    // If we are dealing with a postmortem session, it is now time to connect
    // to the core/trace file.  We have to do this step after
    // we have specified the executable, so we have to do it here.
    // It is safe to do it here because a postmortem session does not support
    // multi-process so this step will not be executed more than once.
    // Bug 338730
    if (fBackend.getSessionType() == SessionType.CORE) {
      String coreFile =
          CDebugUtils.getAttribute(
              fAttributes, ICDTLaunchConfigurationConstants.ATTR_COREFILE_PATH, ""); // $NON-NLS-1$
      final String coreType =
          CDebugUtils.getAttribute(
              fAttributes,
              IGDBLaunchConfigurationConstants.ATTR_DEBUGGER_POST_MORTEM_TYPE,
              IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_TYPE_DEFAULT);

      if (coreFile.length() == 0) {
        new PromptForCoreJob(
                "Prompt for post mortem file", //$NON-NLS-1$
                new DataRequestMonitor<String>(getExecutor(), rm) {
                  @Override
                  protected void handleCancel() {
                    rm.cancel();
                    rm.done();
                  }

                  @Override
                  protected void handleSuccess() {
                    String newCoreFile = getData();
                    if (newCoreFile == null || newCoreFile.length() == 0) {
                      rm.setStatus(
                          new Status(
                              IStatus.ERROR,
                              GdbPlugin.PLUGIN_ID,
                              -1,
                              "Cannot get post mortem file path",
                              null)); //$NON-NLS-1$
                      rm.done();
                    } else {
                      if (coreType.equals(
                          IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_CORE_FILE)) {
                        fCommandControl.queueCommand(
                            fCommandFactory.createMITargetSelectCore(
                                fCommandControl.getContext(), newCoreFile),
                            new DataRequestMonitor<MIInfo>(getExecutor(), rm));
                      } else if (coreType.equals(
                          IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_TRACE_FILE)) {
                        IGDBTraceControl traceControl = fTracker.getService(IGDBTraceControl.class);
                        if (traceControl != null) {
                          ITraceTargetDMContext targetDmc =
                              DMContexts.getAncestorOfType(
                                  fCommandControl.getContext(), ITraceTargetDMContext.class);
                          traceControl.loadTraceData(targetDmc, newCoreFile, rm);
                        } else {
                          rm.setStatus(
                              new Status(
                                  IStatus.ERROR,
                                  GdbPlugin.PLUGIN_ID,
                                  -1,
                                  "Tracing not supported",
                                  null));
                          rm.done();
                        }
                      } else {
                        rm.setStatus(
                            new Status(
                                IStatus.ERROR,
                                GdbPlugin.PLUGIN_ID,
                                -1,
                                "Invalid post-mortem type",
                                null));
                        rm.done();
                      }
                    }
                  }
                })
            .schedule();
      } else {
        if (coreType.equals(IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_CORE_FILE)) {
          fCommandControl.queueCommand(
              fCommandFactory.createMITargetSelectCore(fCommandControl.getContext(), coreFile),
              new DataRequestMonitor<MIInfo>(getExecutor(), rm));
        } else if (coreType.equals(
            IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_TRACE_FILE)) {
          IGDBTraceControl traceControl = fTracker.getService(IGDBTraceControl.class);
          if (traceControl != null) {
            ITraceTargetDMContext targetDmc =
                DMContexts.getAncestorOfType(
                    fCommandControl.getContext(), ITraceTargetDMContext.class);
            traceControl.loadTraceData(targetDmc, coreFile, rm);
          } else {
            rm.setStatus(
                new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, -1, "Tracing not supported", null));
            rm.done();
          }
        } else {
          rm.setStatus(
              new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, -1, "Invalid post-mortem type", null));
          rm.done();
        }
      }
    } else {
      rm.done();
    }
  }
Esempio n. 8
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  /**
   * This method processes "load info" requests. The load is computed using a sampling method; two
   * readings of a local or remote /proc/stat file are done with a delay in between. Then the load
   * is computed from the two samples, for all CPUs/cores known in the system.
   *
   * <p>Because of the method used, it's possible that fast variations in CPU usage will be missed.
   * However longer load trends should be reflected in the results.
   *
   * <p>To avoid generating too much load in the remote case, there is a cache that will return the
   * already computed load, if requested multiple times in a short period. There is also a mechanism
   * to queue subsequent requests if one is ongoing. Upon completion of the ongoing request, any
   * queued request is answered with the load that was just computed.
   *
   * @since 4.2
   */
  @Override
  public void getLoadInfo(final IDMContext context, final DataRequestMonitor<ILoadInfo> rm) {
    if (!(context instanceof ICoreDMContext) && !(context instanceof ICPUDMContext)) {
      // we only support getting the load for a CPU or a core
      rm.done(
          new Status(
              IStatus.ERROR,
              GdbPlugin.PLUGIN_ID,
              INVALID_HANDLE,
              "Load information not supported for this context type",
              null)); //$NON-NLS-1$
      return;
    }

    // The measurement interval should be of a minimum length to be meaningful
    assert (LOAD_SAMPLE_DELAY >= 100);
    // so the cache is useful
    assert (LOAD_CACHE_LIFETIME >= LOAD_SAMPLE_DELAY);

    // This way of computing the CPU load is only applicable to Linux
    if (!supportsProcPseudoFS()) {
      rm.done(
          new Status(
              IStatus.ERROR,
              GdbPlugin.PLUGIN_ID,
              NOT_SUPPORTED,
              "Operation not supported",
              null)); //$NON-NLS-1$
      return;
    }

    // Is a request is already ongoing?
    if (fLoadRequestOngoing) {
      // queue current new request
      fLoadInfoRequestCache.put(context, rm);
      return;
    }
    // no request ongoing, so proceed
    fLoadRequestOngoing = true;

    // caching mechanism to keep things sane, even if the views(s)
    // request load information very often.
    long currentTime = System.currentTimeMillis();

    // time to fetch fresh load information?
    if (fLastCpuLoadRefresh + LOAD_CACHE_LIFETIME < currentTime) {
      fLastCpuLoadRefresh = currentTime;
    } else {
      // not time yet... re-use cached load data
      processLoads(context, rm, fCachedLoads);
      fLoadRequestOngoing = false;
      return;
    }

    final ProcStatParser procStatParser = new ProcStatParser();
    final ICommandControlDMContext dmc =
        DMContexts.getAncestorOfType(context, ICommandControlDMContext.class);
    final String statFile = "/proc/stat"; // $NON-NLS-1$
    final String localFile = sTempFolder + "proc.stat." + getSession().getId(); // $NON-NLS-1$

    // Remote debugging? We will ask GDB to get us the /proc/stat file from target, twice, with a
    // delay between.
    if (fBackend.getSessionType() == SessionType.REMOTE) {
      fCommandControl.queueCommand(
          fCommandFactory.createCLIRemoteGet(dmc, statFile, localFile),
          new ImmediateDataRequestMonitor<MIInfo>(rm) {
            @Override
            protected void handleCompleted() {
              if (!isSuccess()) {
                fLoadRequestOngoing = false;
                rm.done(
                    new Status(
                        IStatus.ERROR,
                        GdbPlugin.PLUGIN_ID,
                        INTERNAL_ERROR,
                        "Can't get load info for CPU",
                        null)); //$NON-NLS-1$
                return;
              }

              // Success - parse first set of stat counters
              try {
                procStatParser.parseStatFile(localFile);
              } catch (Exception e) {
                rm.done(
                    new Status(
                        IStatus.ERROR,
                        GdbPlugin.PLUGIN_ID,
                        INTERNAL_ERROR,
                        "Can't get load info for CPU",
                        null)); //$NON-NLS-1$
                fLoadRequestOngoing = false;
                return;
              }
              // delete temp file
              new File(localFile).delete();

              getExecutor()
                  .schedule(
                      new Runnable() {
                        @Override
                        public void run() {
                          fCommandControl.queueCommand(
                              fCommandFactory.createCLIRemoteGet(dmc, statFile, localFile),
                              new ImmediateDataRequestMonitor<MIInfo>(rm) {
                                @Override
                                protected void handleCompleted() {
                                  if (!isSuccess()) {
                                    fLoadRequestOngoing = false;
                                    rm.done(
                                        new Status(
                                            IStatus.ERROR,
                                            GdbPlugin.PLUGIN_ID,
                                            INTERNAL_ERROR,
                                            "Can't get load info for CPU",
                                            null)); //$NON-NLS-1$
                                    return;
                                  }

                                  // Success - parse the second set of stat counters and compute
                                  // loads
                                  try {
                                    procStatParser.parseStatFile(localFile);
                                  } catch (Exception e) {
                                    rm.done(
                                        new Status(
                                            IStatus.ERROR,
                                            GdbPlugin.PLUGIN_ID,
                                            INTERNAL_ERROR,
                                            "Can't get load info for CPU",
                                            null)); //$NON-NLS-1$
                                    fLoadRequestOngoing = false;
                                    return;
                                  }
                                  // delete temp file
                                  new File(localFile).delete();

                                  // Compute load
                                  fCachedLoads = procStatParser.getCpuLoad();
                                  processLoads(context, rm, fCachedLoads);

                                  // done with request
                                  fLoadRequestOngoing = false;
                                  // process any queued request
                                  for (Entry<IDMContext, DataRequestMonitor<ILoadInfo>> e :
                                      fLoadInfoRequestCache.entrySet()) {
                                    processLoads(e.getKey(), e.getValue(), fCachedLoads);
                                  }
                                  fLoadInfoRequestCache.clear();
                                }
                              });
                        }
                      },
                      LOAD_SAMPLE_DELAY,
                      TimeUnit.MILLISECONDS);
            }
          });
      // Local debugging?  Then we can read /proc/stat directly
    } else {
      // Read /proc/stat file for the first time
      try {
        procStatParser.parseStatFile(statFile);
      } catch (Exception e) {
        rm.done(
            new Status(
                IStatus.ERROR,
                GdbPlugin.PLUGIN_ID,
                INTERNAL_ERROR,
                "Can't get load info for CPU",
                null)); //$NON-NLS-1$
        fLoadRequestOngoing = false;
        return;
      }

      // Read /proc/stat file again after a delay
      getExecutor()
          .schedule(
              new Runnable() {
                @Override
                public void run() {
                  try {
                    procStatParser.parseStatFile(statFile);
                  } catch (Exception e) {
                    rm.done(
                        new Status(
                            IStatus.ERROR,
                            GdbPlugin.PLUGIN_ID,
                            INTERNAL_ERROR,
                            "Can't get load info for CPU",
                            null)); //$NON-NLS-1$
                    fLoadRequestOngoing = false;
                    return;
                  }
                  // compute load
                  fCachedLoads = procStatParser.getCpuLoad();
                  processLoads(context, rm, fCachedLoads);

                  // done with request
                  fLoadRequestOngoing = false;
                  // process any queued request
                  for (Entry<IDMContext, DataRequestMonitor<ILoadInfo>> e :
                      fLoadInfoRequestCache.entrySet()) {
                    processLoads(e.getKey(), e.getValue(), fCachedLoads);
                  }
                  fLoadInfoRequestCache.clear();
                }
              },
              LOAD_SAMPLE_DELAY,
              TimeUnit.MILLISECONDS);
    }
  }