Example #1
0
Process::cb_ret_t Backend::handleTimeEvent() {
  // Get all subscribed events
  set<Event*>& events = Time::getTimeSubscribers();

  set<Event*>::iterator eventIter = events.begin();
  for(;eventIter != events.end(); eventIter++) {
    Event* event = *eventIter;
    ProcessSet::ptr procset = ((Time *)event)->getProcset();
    ProcessSet::iterator procIter = procset->begin();
    if(procset->size() == 0)
      continue;
    if(!event || !event->isEnabled(*procIter))
      continue; // this is to avoid a race condition where a time event occurs in the middle of iterating through the processes
    DYSECTVERBOSE(true, "Time event with timeout %d detected on %d processes", ((Time *)event)->getTimeout(), procset->size());
    for(;procIter != procset->end(); procIter++) {
      Process::ptr procPtr = *procIter;
      if(event && event->isEnabled(procPtr)) {
        Thread::ptr threadPtr = procPtr->threads().getInitialThread();
        Walker *proc = (Walker *)procPtr->getData();
        handleEvent(procPtr, threadPtr, event);
      }
    }
    if(event->getOwner()->getLifeSpan() == fireOnce)
      event->disable();
  }

  return Process::cbDefault;
}
Example #2
0
bool Location::disable(ProcessSet::ptr lprocset) {
  assert(owner != 0);
 
  if(codeLocations.empty()) {
    return Err::verbose(true, "No code locations");

  }

  if(!lprocset) {
    return Err::warn(false, "Process set not present");
  }

  ProcessSet::iterator procIter = lprocset->begin();
  for(;procIter != lprocset->end(); procIter++) {
    Process::ptr procPtr = *procIter;

    Walker* proc = (Walker*)procPtr->getData();

    vector<DysectAPI::CodeLocation*>::iterator locationIter = codeLocations.begin();
    for(;locationIter != codeLocations.end(); locationIter++) {
      DysectAPI::CodeLocation* location = *locationIter;

      if(!location->addProcLib(proc)) {
        return Err::warn(false, "Symbol not found in process");
      }

      vector<Dyninst::Address> addrs;
      
      if(!location->getAddrs(proc, addrs) || addrs.empty()) {
        return Err::warn(false, "Addresses for symbol could not be determined");
      }

      // Breakpoint locations at hand
      for(int i = 0; i < addrs.size() ; i++) {
        Dyninst::Address addr = addrs[i];
        
        if(!procPtr->rmBreakpoint(addr, bp)) {
          Err::verbose(false, "Breakpoint not removed! %s", ProcControlAPI::getLastErrorMsg());
        }
      }
    }
  }

  return true;
}
Example #3
0
ProcessSet::ptr ProcessMgr::filterExited(ProcessSet::ptr inSet) { 
  if(!inSet)
    return inSet;

  if(inSet->empty())
    return inSet;

  ProcessSet::ptr procs = ProcessSet::newProcessSet();
  // Filter out exited processes
  ProcessSet::iterator procIter = inSet->begin();
  for(; procIter != inSet->end(); procIter++) {
    Process::ptr process = *procIter;

    if(process->isTerminated() || process->isExited() || process->isCrashed() || process->isDetached()) {
      continue;
    }

    procs->insert(process);
  }
  
  return procs;
}
Example #4
0
bool Location::enable(ProcessSet::ptr lprocset) {
  assert(owner != 0);
 
  if(codeLocations.empty()) {
    return Err::verbose(true, "No code locations");

  }

  if(!lprocset) {
    return Err::warn(false, "Process set not present");
  }
  
  ProcessSet::iterator procIter = lprocset->begin();

  AddressSet::ptr addrset = AddressSet::newAddressSet();

  if(lprocset->size() <= 0) {
    return Err::info(true, "Process set empty!");
  }

  // Find library location for target processes
  for(;procIter != lprocset->end(); procIter++) {
    Process::ptr procPtr = *procIter;

    Walker* proc = (Walker*)procPtr->getData();

    vector<DysectAPI::CodeLocation*>::iterator locationIter = codeLocations.begin();
    for(;locationIter != codeLocations.end(); locationIter++) {
      DysectAPI::CodeLocation* location = *locationIter;

      if(!location->addProcLib(proc)) {
        return Err::warn(false, "Symbol not found in process");
      }

      vector<Dyninst::Address> addrs;
      
      if(!location->getAddrs(proc, addrs) || addrs.empty()) {
        return Err::warn(false, "Addresses for symbol could not be determined");
      }

      // Breakpoint locations at hand
      for(int i = 0; i < addrs.size() ; i++) {
        Dyninst::Address addr = addrs[i];
        
        if(!procPtr->addBreakpoint(addr, bp)) {
          return Err::verbose(false, "Breakpoint not installed: %s", ProcControlAPI::getLastErrorMsg());
        } else {
          Err::verbose(true, "Breakpoint installed at %lx", addr);
        }

        //addrset->insert(addr, procPtr);
      }

      //if(addrs.empty()) {
      //  Err::verbose(true, "No addresses");
      //}
    }

  }
  
  //if(addrset->size() <= 0) {
  //  return Err::verbose(true, "Empty address set");
  //}

  
  //if(!lprocset->addBreakpoint(addrset, nbp)) {
  //  return Err::warn(false, "Could not insert breakpoints!");
  //} else {
  //  Err::info(true, "%d breakpoints inserted in %d processes", addrset->size(), lprocset->size());
  //}

  return true;
}
Example #5
0
bool Probe::processRequests() {
  if(requestQueue.empty()) {
    return true;
  }

  pthread_mutex_lock(&requestQueueMutex); 
  vector<ProbeRequest*> queue = requestQueue;
  requestQueue.clear();
  pthread_mutex_unlock(&requestQueueMutex); 

  ProcessSet::ptr continueSet = ProcessSet::newProcessSet();
 
  // Sort queue

  deque<ProbeRequest*> sortedQueue;
  vector<ProbeRequest*>::iterator requestIter = queue.begin();
  for(int i = 0; requestIter != queue.end(); requestIter++) {
    ProbeRequest* request = *requestIter;

    if(!request) {
      DYSECTWARN(true, "Invalid request in request queue");
      break;
    }

    if(request->type == DisableType) {
      sortedQueue.push_back(request);
    } else {
      sortedQueue.push_front(request);
    }
  }

  if (sortedQueue.size() == 0)
    return true;

  DYSECTVERBOSE(true, "Handling %d process requests", sortedQueue.size());

  deque<ProbeRequest*>::iterator sortedRequestIter = sortedQueue.begin();
  for(int i = 0; sortedRequestIter != sortedQueue.end(); sortedRequestIter++) {
    ProbeRequest* request = *sortedRequestIter;

    if(!request) {
      DYSECTWARN(true, "Invalid request in request queue");
      break;
    }

    DYSECTVERBOSE(true, "processRequests() %d", i++);

    Probe* probe = request->probe;
    if(!probe) {
      DYSECTWARN(false, "Probe not found for disable request!");
      break;
    }

    ProcessSet::ptr waitingProcs = request->scope;
    if(waitingProcs && waitingProcs->size() > 0) {
      DYSECTVERBOSE(true, "Adding %d request processes to %d continue set...", waitingProcs->size(), continueSet->size());
      continueSet = continueSet->set_union(waitingProcs);
    }

    ProcessSet::ptr operationSet = ProcessSet::newProcessSet();
    ProcessSet::ptr stopSet = ProcessSet::newProcessSet();

    ProcessSet::ptr scope = request->scope;
    if(scope && scope->size() > 0) {
      DYSECTVERBOSE(true, "Adding processes from scope set (%d) to affected procs (%d)", scope->size(), operationSet->size());
      operationSet = operationSet->set_union(scope);
    }

    //
    // Filter out detached
    //
    operationSet = ProcessMgr::filterDetached(operationSet);
    stopSet = ProcessMgr::filterDetached(stopSet);
    DYSECTVERBOSE(true, "%d procs in op set, %d procs in stop set", operationSet->size(), stopSet->size());

    //
    // Stop processes
    //
  
    stopSet = operationSet->getAnyThreadRunningSubset();
    if(stopSet && stopSet->size() > 0) {
      DYSECTVERBOSE(true, "Stopping %d processes", stopSet->size());
      
      stopSet->stopProcs();
    }

    //
    // Carry out operations
    //

    if(operationSet && operationSet->size() > 0) {
      if(request->type == DisableType) {
        DYSECTVERBOSE(true, "Disabling %d processes", operationSet->size());
        probe->disable(operationSet);
      } else {
        DYSECTVERBOSE(true, "Enabling %d processes", operationSet->size());
        probe->enableChildren(operationSet);
      }
    }
    
    //
    // Processes must be started when all operations have been carried out.
    //
    if(operationSet && operationSet->size() > 0) {
      continueSet = continueSet->set_union(operationSet);
    }

    delete(request);
  }

  continueSet = ProcessMgr::filterDetached(continueSet);

  if(continueSet && continueSet->size() > 0) {
    DYSECTVERBOSE(true, "Continuing %d processes", continueSet->size());
    if(continueSet->size() == 1) {
      ProcessSet::iterator procIter = continueSet->begin();
      Process::ptr process = *procIter;
      DYSECTVERBOSE(true, "Continuing process %d", process->getPid());
    }
    
    continueSet->continueProcs();
  }

  DYSECTVERBOSE(true, "Done handling requests");

  return true;
}