Re: Signal Handler error

Histogram are (by default) associated with the TFile they are read from and are deleted as soon as the TFile is closed _/*or deleted.*/_ (included indirectly when the TFile is on the stack and goes out of scope)

Philippe.

On 9/19/11 11:23 AM, Harinder Singh Bawa wrote:
> Hi Philippes,
>
> I understand your point but if I dont close the file, then? I am getting same error then also, When I get Entries of the histogram,
>
>
>
> bool*retrieve(string filename, string key, TObject& objectToSendBack) {*
> {
> TFile file(filename.c_str(),"READ");
> int bytes = objectToSendBack.Read(key.c_str());
> cout << " retrieved bytes=\t" << bytes << "\t of \t" << "\t filename= \t"<< filename << "\t with :key:: \t" << key << endl;
> // file.Close();
> bool success = (bytes > 0);
> return success;
> }
>
> *if(doShowFitToPythia) {*
> //get Pythia reco spectrum and fit it to show the function works.
> gPad->SetLogy(kTRUE);
> // gPad->SetLogx(kTRUE);
> TH1F h_pythia;
>
> cout<<"Retreiving file\t"<<endl;
> retrieve(mcFile,"massMC",h_pythia);
>
> *cout<<"files entries\t"<< h_pythia.GetEntries()<<endl;*
>
> }
>
>
>
>
>
>
>
> On Mon, Sep 19, 2011 at 6:07 PM, Philippe Canal <pcanal_at_fnal.gov <mailto:pcanal_at_fnal.gov>> wrote:
>
> > TFile file(filename.c_str(),"READ");
> > int bytes = objectToSendBack.Read(key.c_str());
>
> Histogram are (by default) associated with the TFile they are read from
> and are deleted as soon as the TFile is close or deleted.
>
> See the ROOT's User Guide chapter on object ownership for more details.
>
> Cheers,
> Philippe.
>
>
> On 9/19/11 6:14 AM, Harinder Singh Bawa wrote:
>> *Hello,
>>
>> Could someone points me what I am doing wrong???
>>
>> I am running Package under Root which is a set of functions.
>>
>> *********The main code function is doShowFitToPythia which is retreiving histogram from file and then scaling to Lumi.
>>
>> The problem is in retreiving function
>>
>> It is supposed to read filename, the key is histogram and it is supposed to fill to object named h_pythia [histogram]. But
>> its not doing so.
>>
>> When I want to make sure , it reads "massMC" histogram and saved to h_pythia object, I wanted to print the entries. But it
>> crashes saying Signalhandler error shown after the function definitions:
>>
>>
>> if(doShowFitToPythia) {*
>> //get Pythia reco spectrum and fit it to show the function works.
>> gPad->SetLogy(kTRUE);
>> // gPad->SetLogx(kTRUE);
>> TH1F h_pythia;
>>
>> cout<<"Retreiving file\t"<<endl;
>> retrieve(mcFile,"massMC",h_pythia);
>>
>> *cout<<"files entries\t"<< h_pythia.GetEntries()<<endl;**********I did it because I am using h_pythia in next function*
>> *Functions like scaleToLumi expect a histogram, not a pointer to a histogram.
>>
>> * cout<<"file retreived\t"<<endl;
>> scaleToLumi(h_pythia,lumi);
>>
>> cout<<"histogram scaled to lumi\t"<<endl;
>> h_pythia = KeepBinsBetween(&h_pythia,massMin,massMax);
>>
>> h_pythia.Draw();
>> print(cv);
>> }
>>
>>
>> bool*retrieve(string filename, string key, TObject& objectToSendBack) {*
>> TFile file(filename.c_str(),"READ");
>> int bytes = objectToSendBack.Read(key.c_str());
>> cout << " retrieved bytes=\t" << bytes << "\t of \t" << "\t filename= \t"<< filename << "\t with :key:: \t" << key << endl;
>> file.Close();
>> bool success = (bytes > 0);
>> return success;
>> }
>>
>> *void scaleToLumi(TH1F& hist, const double& desiredLumi, double currentAssumedLumi = 1.) {*
>>
>> cout<<"hist entries=\t"<<h_pythia.GetEntries()<<endl;
>>
>> cout<<"calculating area\t"<<endl;
>> double area = hist.Integral();
>>
>> cout<<"Area of Histogram=\t"<<area<<endl;
>> assert (area != 0);
>> hist.Scale(desiredLumi / currentAssumedLumi);
>> return;
>> }
>>
>>
>>
>> *
>> ERROR:*******************************************************************
>> [bawa_at_pt3nfs resonance_old]$ ./producePlotsForICHEP.bash
>> part 1
>> rm: cannot remove `setLimits_output.root': No such file or directory
>>
>> Processing setLimits.C...
>> Error in <TROOT::SetStyle>: Unknown style:ATLAS
>> Info in <TCanvas::Print>: ps file pics/all.ps <http://all.ps> has been created
>> Command to : doShowFitToPythia
>> nominalDataFile = signal/june2011_B-H1/dijetMass_data.root
>> mcFile = signal/june2011_B-H1/dijetMass_mc_noK.root
>> nominalSignalsFile = signal/june2011_B-H1/dijetMass_exq.root
>> Setting luminosity to 163.4 pb^-1
>> Setting massMin to 700 GeV
>> Setting massMax to 6000 GeV
>> Setting outputFilename to setLimits_output.root
>> Retreiving file
>> retrieved bytes= 983 of filename= signal/june2011_B-H1/dijetMass_mc_noK.root with
>> :key:: massMC
>> file retreived
>>
>> *** Break *** segmentation violation
>> file entries=
>>
>>
>> ===========================================================
>> There was a crash (#7 0xf7a0b5fd in SigHandler(ESignals) ()).
>> This is the entire stack trace of all threads:
>> ===========================================================
>> #0 0xffffe410 in __kernel_vsyscall ()
>> #1 0x00c37833 in __waitpid_nocancel () from /lib/libc.so.6
>> #2 0x00bdc19b in do_system () from /lib/libc.so.6
>> #3 0x00d40ead in system () from /lib/libpthread.so.0
>> #4 0xf7a05ffd in TUnixSystem::Exec(char const*) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #5 0xf7a0bbe6 in TUnixSystem::StackTrace() ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #6 0xf7a0b4e7 in TUnixSystem::DispatchSignals(ESignals) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #7 0xf7a0b5fd in SigHandler(ESignals) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #8 0xf7a02a32 in sighandler(int) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #9 <signal handler called>
>> #10 0x09f25788 in ?? ()
>> #11 0xf6a42ec2 in G__G__Hist_100_0_101(G__value*, char const*, G__param*, int)
>> ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libHist.so
>> #12 0xf7276056 in Cint::G__ExceptionWrapper(int (*)(G__value*, char const*, G__param*, int), G__value*, char*, G__param*, int) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #13 0xf732fd8c in G__execute_call ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #14 0xf7330b5f in G__call_cppfunc ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #15 0xf730affc in G__interpret_func ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #16 0xf72f7666 in G__getfunction ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #17 0xf73f1546 in G__getstructmem(int, G__FastAllocString&, char*, int, char*, int*, G__var_array*, int) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #18 0xf73e71cd in G__getvariable ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #19 0xf72c8ecf in G__getitem ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #20 0xf72d5711 in G__getexpr ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #21 0xf735ab76 in G__exec_statement ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #22 0xf7361a3a in G__exec_statement ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #23 0xf730a5f7 in G__interpret_func ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #24 0xf72f773f in G__getfunction ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #25 0xf72c8fd8 in G__getitem ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #26 0xf72cd53c in G__getexpr ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #27 0xf72dbaf5 in G__calc_internal ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #28 0xf736fda7 in G__process_cmd ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCint.so
>> #29 0xf79c669c in TCint::ProcessLine(char const*, TInterpreter::EErrorCode*) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #30 0xf79c408f in TCint::ProcessLineSynch(char const*, TInterpreter::EErrorCode*) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #31 0xf7911c1f in TApplication::ExecuteFile(char const*, int*, bool) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #32 0xf7911efc in TApplication::ProcessFile(char const*, int*, bool) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #33 0xf790f5ff in TApplication::ProcessLine(char const*, bool, int*) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libCore.so
>> #34 0xf700ce51 in TRint::Run(bool) ()
>> from /nfs/t3nfs/share/atlas/ATLASLocalRootBase/x86_64/root/5.28.00f-slc5-gcc4.3-i686/lib/libRint.so
>> #35 0x08048db5 in main ()
>> ===========================================================
>>
>>
>> The lines below might hint at the cause of the crash.
>> If they do not help you then please submit a bug report at
>> http://root.cern.ch/bugs. Please post the ENTIRE stack trace
>> from above as an attachment in addition to anything else
>> that might help us fixing this issue.
>> ===========================================================
>> #10 0x09f25788 in ?? ()
>> ===========================================================
>>
>
Received on Mon Sep 19 2011 - 18:29:33 CEST