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EventProcessor.cc
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EventProcessor.cc
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#include "FWCore/Framework/interface/EventProcessor.h"
#include "DataFormats/Provenance/interface/BranchIDListHelper.h"
#include "DataFormats/Provenance/interface/EntryDescriptionRegistry.h"
#include "DataFormats/Provenance/interface/ModuleDescription.h"
#include "DataFormats/Provenance/interface/ParameterSetID.h"
#include "DataFormats/Provenance/interface/ParentageRegistry.h"
#include "DataFormats/Provenance/interface/ProcessConfigurationRegistry.h"
#include "DataFormats/Provenance/interface/ProcessHistoryRegistry.h"
#include "FWCore/Framework/interface/CommonParams.h"
#include "FWCore/Framework/interface/EDLooperBase.h"
#include "FWCore/Framework/interface/EventPrincipal.h"
#include "FWCore/Framework/interface/EventSetupProvider.h"
#include "FWCore/Framework/interface/EventSetupRecord.h"
#include "FWCore/Framework/interface/FileBlock.h"
#include "FWCore/Framework/interface/HistoryAppender.h"
#include "FWCore/Framework/interface/InputSourceDescription.h"
#include "FWCore/Framework/interface/IOVSyncValue.h"
#include "FWCore/Framework/interface/LooperFactory.h"
#include "FWCore/Framework/interface/LuminosityBlock.h"
#include "FWCore/Framework/interface/LuminosityBlockPrincipal.h"
#include "FWCore/Framework/interface/MessageReceiverForSource.h"
#include "FWCore/Framework/interface/ModuleChanger.h"
#include "FWCore/Framework/interface/OccurrenceTraits.h"
#include "FWCore/Framework/interface/ProcessingController.h"
#include "FWCore/Framework/interface/RunPrincipal.h"
#include "FWCore/Framework/interface/Schedule.h"
#include "FWCore/Framework/interface/ScheduleInfo.h"
#include "FWCore/Framework/interface/SubProcess.h"
#include "FWCore/Framework/src/Breakpoints.h"
#include "FWCore/Framework/src/EPStates.h"
#include "FWCore/Framework/src/EventSetupsController.h"
#include "FWCore/Framework/src/InputSourceFactory.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/IllegalParameters.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescriptionFillerBase.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescriptionFillerPluginFactory.h"
#include "FWCore/ParameterSet/interface/ProcessDesc.h"
#include "FWCore/ParameterSet/interface/Registry.h"
#include "FWCore/PythonParameterSet/interface/PythonProcessDesc.h"
#include "FWCore/ServiceRegistry/interface/ServiceRegistry.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/Utilities/interface/DebugMacros.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "FWCore/Utilities/interface/ConvertException.h"
#include "FWCore/Utilities/interface/RandomNumberGenerator.h"
#include "FWCore/Utilities/interface/UnixSignalHandlers.h"
#include "FWCore/Utilities/interface/ExceptionCollector.h"
#include "FWCore/Utilities/interface/StreamID.h"
#include "MessageForSource.h"
#include "MessageForParent.h"
#include "boost/bind.hpp"
#include "boost/thread/xtime.hpp"
#include <exception>
#include <iomanip>
#include <iostream>
#include <utility>
#include <sstream>
#include <sys/ipc.h>
#include <sys/msg.h>
//Used for forking
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/fcntl.h>
#include <unistd.h>
//Used for CPU affinity
#ifndef __APPLE__
#include <sched.h>
#endif
//Needed for introspection
#include "Cintex/Cintex.h"
namespace edm {
namespace event_processor {
class StateSentry {
public:
StateSentry(EventProcessor* ep) : ep_(ep), success_(false) { }
~StateSentry() {if(!success_) ep_->changeState(mException);}
void succeeded() {success_ = true;}
private:
EventProcessor* ep_;
bool success_;
};
}
using namespace event_processor;
namespace {
template <typename T>
class ScheduleSignalSentry {
public:
ScheduleSignalSentry(ActivityRegistry* a, typename T::MyPrincipal* principal, EventSetup const* es) :
a_(a), principal_(principal), es_(es) {
if (a_) T::preScheduleSignal(a_, principal_);
}
~ScheduleSignalSentry() {
if (a_) if (principal_) T::postScheduleSignal(a_, principal_, es_);
}
private:
// We own none of these resources.
ActivityRegistry* a_;
typename T::MyPrincipal* principal_;
EventSetup const* es_;
};
}
namespace {
// the next two tables must be kept in sync with the state and
// message enums from the header
char const* stateNames[] = {
"Init",
"JobReady",
"RunGiven",
"Running",
"Stopping",
"ShuttingDown",
"Done",
"JobEnded",
"Error",
"ErrorEnded",
"End",
"Invalid"
};
char const* msgNames[] = {
"SetRun",
"Skip",
"RunAsync",
"Run(ID)",
"Run(count)",
"BeginJob",
"StopAsync",
"ShutdownAsync",
"EndJob",
"CountComplete",
"InputExhausted",
"StopSignal",
"ShutdownSignal",
"Finished",
"Any",
"dtor",
"Exception",
"Rewind"
};
}
// IMPORTANT NOTE:
// the mAny messages are special, they must appear last in the
// table if multiple entries for a CurrentState are present.
// the changeState function does not use the mAny yet!!!
struct TransEntry {
State current;
Msg message;
State final;
};
// we should use this information to initialize a two dimensional
// table of t[CurrentState][Message] = FinalState
/*
the way this is current written, the async run can thread function
can return in the "JobReady" state - but not yet cleaned up. The
problem is that only when stop/shutdown async is called is the
thread cleaned up. But the stop/shudown async functions attempt
first to change the state using messages that are not valid in
"JobReady" state.
I think most of the problems can be solved by using two states
for "running": RunningS and RunningA (sync/async). The problems
seems to be the all the transitions out of running for both
modes of operation. The other solution might be to only go to
"Stopping" from Running, and use the return code from "run_p" to
set the final state. If this is used, then in the sync mode the
"Stopping" state would be momentary.
*/
TransEntry table[] = {
// CurrentState Message FinalState
// -----------------------------------------
{ sInit, mException, sError },
{ sInit, mBeginJob, sJobReady },
{ sJobReady, mException, sError },
{ sJobReady, mSetRun, sRunGiven },
{ sJobReady, mInputRewind, sRunning },
{ sJobReady, mSkip, sRunning },
{ sJobReady, mRunID, sRunning },
{ sJobReady, mRunCount, sRunning },
{ sJobReady, mEndJob, sJobEnded },
{ sJobReady, mBeginJob, sJobReady },
{ sJobReady, mDtor, sEnd }, // should this be allowed?
{ sJobReady, mStopAsync, sJobReady },
{ sJobReady, mCountComplete, sJobReady },
{ sJobReady, mFinished, sJobReady },
{ sRunGiven, mException, sError },
{ sRunGiven, mRunAsync, sRunning },
{ sRunGiven, mBeginJob, sRunGiven },
{ sRunGiven, mShutdownAsync, sShuttingDown },
{ sRunGiven, mStopAsync, sStopping },
{ sRunning, mException, sError },
{ sRunning, mStopAsync, sStopping },
{ sRunning, mShutdownAsync, sShuttingDown },
{ sRunning, mShutdownSignal, sShuttingDown },
{ sRunning, mCountComplete, sStopping }, // sJobReady
{ sRunning, mInputExhausted, sStopping }, // sJobReady
{ sStopping, mInputRewind, sRunning }, // The looper needs this
{ sStopping, mException, sError },
{ sStopping, mFinished, sJobReady },
{ sStopping, mCountComplete, sJobReady },
{ sStopping, mShutdownSignal, sShuttingDown },
{ sStopping, mStopAsync, sStopping }, // stay
{ sStopping, mInputExhausted, sStopping }, // stay
//{ sStopping, mAny, sJobReady }, // <- ??????
{ sShuttingDown, mException, sError },
{ sShuttingDown, mShutdownSignal, sShuttingDown },
{ sShuttingDown, mCountComplete, sDone }, // needed?
{ sShuttingDown, mInputExhausted, sDone }, // needed?
{ sShuttingDown, mFinished, sDone },
//{ sShuttingDown, mShutdownAsync, sShuttingDown }, // only one at
//{ sShuttingDown, mStopAsync, sShuttingDown }, // a time
//{ sShuttingDown, mAny, sDone }, // <- ??????
{ sDone, mEndJob, sJobEnded },
{ sDone, mException, sError },
{ sJobEnded, mDtor, sEnd },
{ sJobEnded, mException, sError },
{ sError, mEndJob, sError }, // funny one here
{ sError, mDtor, sError }, // funny one here
{ sInit, mDtor, sEnd }, // for StorM dummy EP
{ sStopping, mShutdownAsync, sShuttingDown }, // For FUEP tests
{ sInvalid, mAny, sInvalid }
};
// Note: many of the messages generate the mBeginJob message first
// mRunID, mRunCount, mSetRun
// ---------------------------------------------------------------
std::unique_ptr<InputSource>
makeInput(ParameterSet& params,
CommonParams const& common,
ProductRegistry& preg,
boost::shared_ptr<BranchIDListHelper> branchIDListHelper,
boost::shared_ptr<ActivityRegistry> areg,
boost::shared_ptr<ProcessConfiguration const> processConfiguration) {
ParameterSet* main_input = params.getPSetForUpdate("@main_input");
if(main_input == 0) {
throw Exception(errors::Configuration)
<< "There must be exactly one source in the configuration.\n"
<< "It is missing (or there are sufficient syntax errors such that it is not recognized as the source)\n";
}
std::string modtype(main_input->getParameter<std::string>("@module_type"));
std::auto_ptr<ParameterSetDescriptionFillerBase> filler(
ParameterSetDescriptionFillerPluginFactory::get()->create(modtype));
ConfigurationDescriptions descriptions(filler->baseType());
filler->fill(descriptions);
try {
try {
descriptions.validate(*main_input, std::string("source"));
}
catch (cms::Exception& e) { throw; }
catch (std::bad_alloc& bda) { convertException::badAllocToEDM(); }
catch (std::exception& e) { convertException::stdToEDM(e); }
catch (std::string& s) { convertException::stringToEDM(s); }
catch (char const* c) { convertException::charPtrToEDM(c); }
catch (...) { convertException::unknownToEDM(); }
}
catch (cms::Exception & iException) {
std::ostringstream ost;
ost << "Validating configuration of input source of type " << modtype;
iException.addContext(ost.str());
throw;
}
main_input->registerIt();
// Fill in "ModuleDescription", in case the input source produces
// any EDproducts, which would be registered in the ProductRegistry.
// Also fill in the process history item for this process.
// There is no module label for the unnamed input source, so
// just use "source".
// Only the tracked parameters belong in the process configuration.
ModuleDescription md(main_input->id(),
main_input->getParameter<std::string>("@module_type"),
"source",
processConfiguration.get());
InputSourceDescription isdesc(md, preg, branchIDListHelper, areg, common.maxEventsInput_, common.maxLumisInput_);
areg->preSourceConstructionSignal_(md);
std::unique_ptr<InputSource> input;
try {
try {
input = std::unique_ptr<InputSource>(InputSourceFactory::get()->makeInputSource(*main_input, isdesc).release());
}
catch (cms::Exception& e) { throw; }
catch (std::bad_alloc& bda) { convertException::badAllocToEDM(); }
catch (std::exception& e) { convertException::stdToEDM(e); }
catch (std::string& s) { convertException::stringToEDM(s); }
catch (char const* c) { convertException::charPtrToEDM(c); }
catch (...) { convertException::unknownToEDM(); }
}
catch (cms::Exception& iException) {
areg->postSourceConstructionSignal_(md);
std::ostringstream ost;
ost << "Constructing input source of type " << modtype;
iException.addContext(ost.str());
throw;
}
areg->postSourceConstructionSignal_(md);
return input;
}
// ---------------------------------------------------------------
boost::shared_ptr<EDLooperBase>
fillLooper(eventsetup::EventSetupsController& esController,
eventsetup::EventSetupProvider& cp,
ParameterSet& params) {
boost::shared_ptr<EDLooperBase> vLooper;
std::vector<std::string> loopers = params.getParameter<std::vector<std::string> >("@all_loopers");
if(loopers.size() == 0) {
return vLooper;
}
assert(1 == loopers.size());
for(std::vector<std::string>::iterator itName = loopers.begin(), itNameEnd = loopers.end();
itName != itNameEnd;
++itName) {
ParameterSet* providerPSet = params.getPSetForUpdate(*itName);
providerPSet->registerIt();
vLooper = eventsetup::LooperFactory::get()->addTo(esController,
cp,
*providerPSet);
}
return vLooper;
}
// ---------------------------------------------------------------
EventProcessor::EventProcessor(std::string const& config,
ServiceToken const& iToken,
serviceregistry::ServiceLegacy iLegacy,
std::vector<std::string> const& defaultServices,
std::vector<std::string> const& forcedServices) :
actReg_(),
preg_(),
branchIDListHelper_(),
serviceToken_(),
input_(),
espController_(new eventsetup::EventSetupsController),
esp_(),
act_table_(),
processConfiguration_(),
schedule_(),
subProcess_(),
historyAppender_(new HistoryAppender),
state_(sInit),
event_loop_(),
state_lock_(),
stop_lock_(),
stopper_(),
starter_(),
stop_count_(-1),
last_rc_(epSuccess),
last_error_text_(),
id_set_(false),
event_loop_id_(),
my_sig_num_(getSigNum()),
fb_(),
looper_(),
principalCache_(),
shouldWeStop_(false),
stateMachineWasInErrorState_(false),
fileMode_(),
emptyRunLumiMode_(),
exceptionMessageFiles_(),
exceptionMessageRuns_(),
exceptionMessageLumis_(),
alreadyHandlingException_(false),
forceLooperToEnd_(false),
looperBeginJobRun_(false),
forceESCacheClearOnNewRun_(false),
numberOfForkedChildren_(0),
numberOfSequentialEventsPerChild_(1),
setCpuAffinity_(false),
eventSetupDataToExcludeFromPrefetching_() {
boost::shared_ptr<ParameterSet> parameterSet = PythonProcessDesc(config).parameterSet();
boost::shared_ptr<ProcessDesc> processDesc(new ProcessDesc(parameterSet));
processDesc->addServices(defaultServices, forcedServices);
init(processDesc, iToken, iLegacy);
}
EventProcessor::EventProcessor(std::string const& config,
std::vector<std::string> const& defaultServices,
std::vector<std::string> const& forcedServices) :
actReg_(),
preg_(),
branchIDListHelper_(),
serviceToken_(),
input_(),
espController_(new eventsetup::EventSetupsController),
esp_(),
act_table_(),
processConfiguration_(),
schedule_(),
subProcess_(),
historyAppender_(new HistoryAppender),
state_(sInit),
event_loop_(),
state_lock_(),
stop_lock_(),
stopper_(),
starter_(),
stop_count_(-1),
last_rc_(epSuccess),
last_error_text_(),
id_set_(false),
event_loop_id_(),
my_sig_num_(getSigNum()),
fb_(),
looper_(),
principalCache_(),
shouldWeStop_(false),
stateMachineWasInErrorState_(false),
fileMode_(),
emptyRunLumiMode_(),
exceptionMessageFiles_(),
exceptionMessageRuns_(),
exceptionMessageLumis_(),
alreadyHandlingException_(false),
forceLooperToEnd_(false),
looperBeginJobRun_(false),
forceESCacheClearOnNewRun_(false),
numberOfForkedChildren_(0),
numberOfSequentialEventsPerChild_(1),
setCpuAffinity_(false),
eventSetupDataToExcludeFromPrefetching_() {
boost::shared_ptr<ParameterSet> parameterSet = PythonProcessDesc(config).parameterSet();
boost::shared_ptr<ProcessDesc> processDesc(new ProcessDesc(parameterSet));
processDesc->addServices(defaultServices, forcedServices);
init(processDesc, ServiceToken(), serviceregistry::kOverlapIsError);
}
EventProcessor::EventProcessor(boost::shared_ptr<ProcessDesc>& processDesc,
ServiceToken const& token,
serviceregistry::ServiceLegacy legacy) :
actReg_(),
preg_(),
branchIDListHelper_(),
serviceToken_(),
input_(),
espController_(new eventsetup::EventSetupsController),
esp_(),
act_table_(),
processConfiguration_(),
schedule_(),
subProcess_(),
historyAppender_(new HistoryAppender),
state_(sInit),
event_loop_(),
state_lock_(),
stop_lock_(),
stopper_(),
starter_(),
stop_count_(-1),
last_rc_(epSuccess),
last_error_text_(),
id_set_(false),
event_loop_id_(),
my_sig_num_(getSigNum()),
fb_(),
looper_(),
principalCache_(),
shouldWeStop_(false),
stateMachineWasInErrorState_(false),
fileMode_(),
emptyRunLumiMode_(),
exceptionMessageFiles_(),
exceptionMessageRuns_(),
exceptionMessageLumis_(),
alreadyHandlingException_(false),
forceLooperToEnd_(false),
looperBeginJobRun_(false),
forceESCacheClearOnNewRun_(false),
numberOfForkedChildren_(0),
numberOfSequentialEventsPerChild_(1),
setCpuAffinity_(false),
eventSetupDataToExcludeFromPrefetching_() {
init(processDesc, token, legacy);
}
EventProcessor::EventProcessor(std::string const& config, bool isPython):
actReg_(),
preg_(),
branchIDListHelper_(),
serviceToken_(),
input_(),
espController_(new eventsetup::EventSetupsController),
esp_(),
act_table_(),
processConfiguration_(),
schedule_(),
subProcess_(),
historyAppender_(new HistoryAppender),
state_(sInit),
event_loop_(),
state_lock_(),
stop_lock_(),
stopper_(),
starter_(),
stop_count_(-1),
last_rc_(epSuccess),
last_error_text_(),
id_set_(false),
event_loop_id_(),
my_sig_num_(getSigNum()),
fb_(),
looper_(),
principalCache_(),
shouldWeStop_(false),
stateMachineWasInErrorState_(false),
fileMode_(),
emptyRunLumiMode_(),
exceptionMessageFiles_(),
exceptionMessageRuns_(),
exceptionMessageLumis_(),
alreadyHandlingException_(false),
forceLooperToEnd_(false),
looperBeginJobRun_(false),
forceESCacheClearOnNewRun_(false),
numberOfForkedChildren_(0),
numberOfSequentialEventsPerChild_(1),
setCpuAffinity_(false),
eventSetupDataToExcludeFromPrefetching_() {
if(isPython) {
boost::shared_ptr<ParameterSet> parameterSet = PythonProcessDesc(config).parameterSet();
boost::shared_ptr<ProcessDesc> processDesc(new ProcessDesc(parameterSet));
init(processDesc, ServiceToken(), serviceregistry::kOverlapIsError);
}
else {
boost::shared_ptr<ProcessDesc> processDesc(new ProcessDesc(config));
init(processDesc, ServiceToken(), serviceregistry::kOverlapIsError);
}
}
void
EventProcessor::init(boost::shared_ptr<ProcessDesc>& processDesc,
ServiceToken const& iToken,
serviceregistry::ServiceLegacy iLegacy) {
//std::cerr << processDesc->dump() << std::endl;
ROOT::Cintex::Cintex::Enable();
boost::shared_ptr<ParameterSet> parameterSet = processDesc->getProcessPSet();
//std::cerr << parameterSet->dump() << std::endl;
// If there is a subprocess, pop the subprocess parameter set out of the process parameter set
boost::shared_ptr<ParameterSet> subProcessParameterSet(popSubProcessParameterSet(*parameterSet).release());
// Now set some parameters specific to the main process.
ParameterSet const& optionsPset(parameterSet->getUntrackedParameterSet("options", ParameterSet()));
fileMode_ = optionsPset.getUntrackedParameter<std::string>("fileMode", "");
emptyRunLumiMode_ = optionsPset.getUntrackedParameter<std::string>("emptyRunLumiMode", "");
forceESCacheClearOnNewRun_ = optionsPset.getUntrackedParameter<bool>("forceEventSetupCacheClearOnNewRun", false);
ParameterSet const& forking = optionsPset.getUntrackedParameterSet("multiProcesses", ParameterSet());
numberOfForkedChildren_ = forking.getUntrackedParameter<int>("maxChildProcesses", 0);
numberOfSequentialEventsPerChild_ = forking.getUntrackedParameter<unsigned int>("maxSequentialEventsPerChild", 1);
setCpuAffinity_ = forking.getUntrackedParameter<bool>("setCpuAffinity", false);
continueAfterChildFailure_ = forking.getUntrackedParameter<bool>("continueAfterChildFailure",false);
std::vector<ParameterSet> const& excluded = forking.getUntrackedParameterSetVector("eventSetupDataToExcludeFromPrefetching", std::vector<ParameterSet>());
for(std::vector<ParameterSet>::const_iterator itPS = excluded.begin(), itPSEnd = excluded.end();
itPS != itPSEnd;
++itPS) {
eventSetupDataToExcludeFromPrefetching_[itPS->getUntrackedParameter<std::string>("record")].insert(
std::make_pair(itPS->getUntrackedParameter<std::string>("type", "*"),
itPS->getUntrackedParameter<std::string>("label", "")));
}
IllegalParameters::setThrowAnException(optionsPset.getUntrackedParameter<bool>("throwIfIllegalParameter", true));
// Now do general initialization
ScheduleItems items;
//initialize the services
boost::shared_ptr<std::vector<ParameterSet> > pServiceSets = processDesc->getServicesPSets();
ServiceToken token = items.initServices(*pServiceSets, *parameterSet, iToken, iLegacy, true);
serviceToken_ = items.addCPRandTNS(*parameterSet, token);
//make the services available
ServiceRegistry::Operate operate(serviceToken_);
// intialize miscellaneous items
boost::shared_ptr<CommonParams> common(items.initMisc(*parameterSet));
// intialize the event setup provider
esp_ = espController_->makeProvider(*parameterSet);
// initialize the looper, if any
looper_ = fillLooper(*espController_, *esp_, *parameterSet);
if(looper_) {
looper_->setActionTable(items.act_table_.get());
looper_->attachTo(*items.actReg_);
}
// initialize the input source
input_ = makeInput(*parameterSet, *common, *items.preg_, items.branchIDListHelper_, items.actReg_, items.processConfiguration_);
// intialize the Schedule
schedule_ = items.initSchedule(*parameterSet,subProcessParameterSet.get());
// set the data members
act_table_ = std::move(items.act_table_);
actReg_ = items.actReg_;
preg_.reset(items.preg_.release());
branchIDListHelper_ = items.branchIDListHelper_;
processConfiguration_ = items.processConfiguration_;
FDEBUG(2) << parameterSet << std::endl;
// Reusable event principal
boost::shared_ptr<EventPrincipal> ep(new EventPrincipal(preg_,
branchIDListHelper_,
*processConfiguration_,
historyAppender_.get(),
StreamID{0}));
principalCache_.insert(ep);
// initialize the subprocess, if there is one
if(subProcessParameterSet) {
subProcess_.reset(new SubProcess(*subProcessParameterSet, *parameterSet, preg_, branchIDListHelper_, *espController_, *actReg_, token, serviceregistry::kConfigurationOverrides));
}
}
EventProcessor::~EventProcessor() {
// Make the services available while everything is being deleted.
ServiceToken token = getToken();
ServiceRegistry::Operate op(token);
try {
changeState(mDtor);
}
catch(cms::Exception& e) {
LogError("System")
<< e.explainSelf() << "\n";
}
// manually destroy all these thing that may need the services around
espController_.reset();
subProcess_.reset();
esp_.reset();
schedule_.reset();
input_.reset();
looper_.reset();
actReg_.reset();
pset::Registry* psetRegistry = pset::Registry::instance();
psetRegistry->data().clear();
psetRegistry->extra().setID(ParameterSetID());
EntryDescriptionRegistry::instance()->data().clear();
ParentageRegistry::instance()->data().clear();
ProcessConfigurationRegistry::instance()->data().clear();
ProcessHistoryRegistry::instance()->data().clear();
}
void
EventProcessor::beginJob() {
if(state_ != sInit) return;
bk::beginJob();
// can only be run if in the initial state
changeState(mBeginJob);
// StateSentry toerror(this); // should we add this ?
//make the services available
ServiceRegistry::Operate operate(serviceToken_);
//NOTE: This implementation assumes 'Job' means one call
// the EventProcessor::run
// If it really means once per 'application' then this code will
// have to be changed.
// Also have to deal with case where have 'run' then new Module
// added and do 'run'
// again. In that case the newly added Module needs its 'beginJob'
// to be called.
//NOTE: in future we should have a beginOfJob for looper that takes no arguments
// For now we delay calling beginOfJob until first beginOfRun
//if(looper_) {
// looper_->beginOfJob(es);
//}
try {
try {
input_->doBeginJob();
}
catch (cms::Exception& e) { throw; }
catch(std::bad_alloc& bda) { convertException::badAllocToEDM(); }
catch (std::exception& e) { convertException::stdToEDM(e); }
catch(std::string& s) { convertException::stringToEDM(s); }
catch(char const* c) { convertException::charPtrToEDM(c); }
catch (...) { convertException::unknownToEDM(); }
}
catch(cms::Exception& ex) {
ex.addContext("Calling beginJob for the source");
throw;
}
schedule_->beginJob(*preg_);
// toerror.succeeded(); // should we add this?
if(hasSubProcess()) subProcess_->doBeginJob();
actReg_->postBeginJobSignal_();
}
void
EventProcessor::endJob() {
// Collects exceptions, so we don't throw before all operations are performed.
ExceptionCollector c("Multiple exceptions were thrown while executing endJob. An exception message follows for each.\n");
// only allowed to run if state is sIdle, sJobReady, sRunGiven
c.call(boost::bind(&EventProcessor::changeState, this, mEndJob));
//make the services available
ServiceRegistry::Operate operate(serviceToken_);
schedule_->endJob(c);
if(hasSubProcess()) {
c.call(boost::bind(&SubProcess::doEndJob, subProcess_.get()));
}
c.call(boost::bind(&InputSource::doEndJob, input_.get()));
if(looper_) {
c.call(boost::bind(&EDLooperBase::endOfJob, looper_));
}
auto actReg = actReg_.get();
c.call([actReg](){actReg->postEndJobSignal_();});
if(c.hasThrown()) {
c.rethrow();
}
}
ServiceToken
EventProcessor::getToken() {
return serviceToken_;
}
//Setup signal handler to listen for when forked children stop
namespace {
//These are volatile since the compiler can not be allowed to optimize them
// since they can be modified in the signaller handler
volatile bool child_failed = false;
volatile unsigned int num_children_done = 0;
volatile int child_fail_exit_status = 0;
volatile int child_fail_signal = 0;
//NOTE: We setup the signal handler to run in the main thread which
// is also the same thread that then reads the above values
extern "C" {
void ep_sigchld(int, siginfo_t*, void*) {
//printf("in sigchld\n");
//FDEBUG(1) << "in sigchld handler\n";
int stat_loc;
pid_t p = waitpid(-1, &stat_loc, WNOHANG);
while(0<p) {
//printf(" looping\n");
if(WIFEXITED(stat_loc)) {
++num_children_done;
if(0 != WEXITSTATUS(stat_loc)) {
child_fail_exit_status = WEXITSTATUS(stat_loc);
child_failed = true;
}
}
if(WIFSIGNALED(stat_loc)) {
++num_children_done;
child_fail_signal = WTERMSIG(stat_loc);
child_failed = true;
}
p = waitpid(-1, &stat_loc, WNOHANG);
}
}
}
}
enum {
kChildSucceed,
kChildExitBadly,
kChildSegv,
kMaxChildAction
};
namespace {
unsigned int numberOfDigitsInChildIndex(unsigned int numberOfChildren) {
unsigned int n = 0;
while(numberOfChildren != 0) {
++n;
numberOfChildren /= 10;
}
if(n == 0) {
n = 3; // Protect against zero numberOfChildren
}
return n;
}
/*This class embodied the thread which is used to listen to the forked children and
then tell them which events they should process */
class MessageSenderToSource {
public:
MessageSenderToSource(std::vector<int> const& childrenSockets, std::vector<int> const& childrenPipes, long iNEventsToProcess);
void operator()();
private:
const std::vector<int>& m_childrenPipes;
long const m_nEventsToProcess;
fd_set m_socketSet;
unsigned int m_aliveChildren;
int m_maxFd;
};
MessageSenderToSource::MessageSenderToSource(std::vector<int> const& childrenSockets,
std::vector<int> const& childrenPipes,
long iNEventsToProcess):
m_childrenPipes(childrenPipes),
m_nEventsToProcess(iNEventsToProcess),
m_aliveChildren(childrenSockets.size()),
m_maxFd(0)
{
FD_ZERO(&m_socketSet);
for (std::vector<int>::const_iterator it = childrenSockets.begin(), itEnd = childrenSockets.end();
it != itEnd; it++) {
FD_SET(*it, &m_socketSet);
if (*it > m_maxFd) {
m_maxFd = *it;
}
}
for (std::vector<int>::const_iterator it = childrenPipes.begin(), itEnd = childrenPipes.end();
it != itEnd; ++it) {
FD_SET(*it, &m_socketSet);
if (*it > m_maxFd) {
m_maxFd = *it;
}
}
m_maxFd++; // select reads [0,m_maxFd).
}
/* This function is the heart of the communication between parent and child.
* When ready for more data, the child (see MessageReceiverForSource) requests
* data through a AF_UNIX socket message. The parent will then assign the next
* chunk of data by sending a message back.
*
* Additionally, this function also monitors the read-side of the pipe fd from the child.
* If the child dies unexpectedly, the pipe will be selected as ready for read and
* will return EPIPE when read from. Further, if the child thinks the parent has died
* (defined as waiting more than 1s for a response), it will write a single byte to
* the pipe. If the parent has died, the child will get a EPIPE and throw an exception.
* If still alive, the parent will read the byte and ignore it.
*
* Note this function is complemented by the SIGCHLD handler above as currently only the SIGCHLD
* handler can distinguish between success and failure cases.
*/
void
MessageSenderToSource::operator()() {
multicore::MessageForParent childMsg;
LogInfo("ForkingController") << "I am controller";
//this is the master and therefore the controller
multicore::MessageForSource sndmsg;
sndmsg.startIndex = 0;
sndmsg.nIndices = m_nEventsToProcess;
do {
fd_set readSockets, errorSockets;
// Wait for a request from a child for events.
memcpy(&readSockets, &m_socketSet, sizeof(m_socketSet));
memcpy(&errorSockets, &m_socketSet, sizeof(m_socketSet));
// Note that we don't timeout; may be reconsidered in the future.
ssize_t rc;
while (((rc = select(m_maxFd, &readSockets, NULL, &errorSockets, NULL)) < 0) && (errno == EINTR)) {}
if (rc < 0) {
std::cerr << "select failed; should be impossible due to preconditions.\n";
abort();
break;
}
// Read the message from the child.
for (int idx=0; idx<m_maxFd; idx++) {
// Handle errors
if (FD_ISSET(idx, &errorSockets)) {
LogInfo("ForkingController") << "Error on socket " << idx;
FD_CLR(idx, &m_socketSet);
close(idx);
// See if it was the watchdog pipe that died.
for (std::vector<int>::const_iterator it = m_childrenPipes.begin(); it != m_childrenPipes.end(); it++) {
if (*it == idx) {
m_aliveChildren--;
}
}
continue;
}
if (!FD_ISSET(idx, &readSockets)) {
continue;
}
// See if this FD is a child watchdog pipe. If so, read from it to prevent
// writes from blocking.
bool is_pipe = false;
for (std::vector<int>::const_iterator it = m_childrenPipes.begin(), itEnd = m_childrenPipes.end(); it != itEnd; it++) {
if (*it == idx) {
is_pipe = true;
char buf;
while (((rc = read(idx, &buf, 1)) < 0) && (errno == EINTR)) {}
if (rc <= 0) {
m_aliveChildren--;
FD_CLR(idx, &m_socketSet);
close(idx);
}
}
}
// Only execute this block if the FD is a socket for sending the child work.
if (!is_pipe) {
while (((rc = recv(idx, reinterpret_cast<char*>(&childMsg),childMsg.sizeForBuffer() , 0)) < 0) && (errno == EINTR)) {}
if (rc < 0) {
FD_CLR(idx, &m_socketSet);
close(idx);
continue;
}
// Tell the child what events to process.
// If 'send' fails, then the child process has failed (any other possibilities are
// eliminated because we are using fixed-size messages with Unix datagram sockets).
// Thus, the SIGCHLD handler will fire and set child_fail = true.
while (((rc = send(idx, (char *)(&sndmsg), multicore::MessageForSource::sizeForBuffer(), 0)) < 0) && (errno == EINTR)) {}
if (rc < 0) {
FD_CLR(idx, &m_socketSet);
close(idx);
continue;
}
//std::cout << "Sent chunk starting at " << sndmsg.startIndex << " to child, length " << sndmsg.nIndices << std::endl;
sndmsg.startIndex += sndmsg.nIndices;
}
}
} while (m_aliveChildren > 0);
return;
}
}
void EventProcessor::possiblyContinueAfterForkChildFailure() {
if(child_failed && continueAfterChildFailure_) {
if (child_fail_signal) {
LogSystem("ForkedChildFailed") << "child process ended abnormally with signal " << child_fail_signal;
child_fail_signal=0;
} else if (child_fail_exit_status) {
LogSystem("ForkedChildFailed") << "child process ended abnormally with exit code " << child_fail_exit_status;
child_fail_exit_status=0;
} else {
LogSystem("ForkedChildFailed") << "child process ended abnormally for unknown reason";
}
child_failed =false;
}
}
bool
EventProcessor::forkProcess(std::string const& jobReportFile) {