Hi,
I cannot run your test program because there are missing pieces.
However, I see a huge bug in your program that explains very likely the problem.
You have a statement;
sprintf(filename,"%s/electron_loss.dat",datapath);a2=..
You have declared
char* filename;
but never allocated space for this pointer. As a result, you overwrite
your program.
Rene Brun
FECHNER Maximilien wrote:
>
> Dear ROOTers,
>
> I use a linux computer with the following compiler
>
> gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-81).
>
> I have encountered segfaults crashes in the program enclosed in the
> attachment when I used the ROOT binaries present on the system (dec 2002
> version).
> THe program crashed in method TTree::Fill, TTree::Print and
> TObject::Write().
> So I decided to upgrade to ROOT 3.05.02.I have done so,the programs compiles
> fine, but it now segfaults
> almost immediately at a different location.
>
> The stack trace is :
> *** Break *** segmentation violation
> Generating stack trace...
> 0x4021338f in TUnixSystem::StackTrace(void) + 0x25b from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> 0x40211f82 in TUnixSystem::DispatchSignals(ESignals) + 0xb2 from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> 0x4021112b in TWebFile::GetSize(void) const + 0x9b from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> 0x40214c61 in TUnixSystem::GetSockOpt(int, int, int *) + 0x339 from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> 0x415b9935 in sigaction at
> /usr/src/bs/BUILD/glibc-2.2.2/linuxthreads/signals.c:97 from
> /lib/i686/libpthread.so.0
> 0x413bd648 in killpg at
> /usr/src/bs/BUILD/glibc-2.2.2/signal/../sysdeps/posix/killpg.c:34 from
> /lib/i686/libc.so.6
> 0x08048feb in main + 0xdb from ./Range.exe
> 0x413ac177 in __libc_start_main at
> /usr/src/bs/BUILD/glibc-2.2.2/csu/../sysdeps/generic/libc-start.c:129 from
> /lib/i686/libc.so.6
> 0x08048ad1 in _start + 0x21 from ./Range.exe
> Abandon (core dumped)
>
> Analysis of the core dump gives the following output with gbd's
> 'backtrace' command :
> (gdb) bt
> #0 0x413bd801 in __kill () from /lib/i686/libc.so.6
> #1 0x413bd5da in raise (sig=6) at ../sysdeps/posix/raise.c:27
> #2 0x413bed82 in abort () at ../sysdeps/generic/abort.c:88
> #3 0x40213134 in TUnixSystem::StackTrace () from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> #4 0x40212028 in TUnixSystem::DispatchSignals () from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> #5 0x4021112b in SigHandler () from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> #6 0x40214c61 in sighandler () from
> /home/daplxa119/mnt/mfechner/root/lib/libCore.so
> #7 0x415b9935 in pthread_sighandler (signo=11, ctx=
> {gs = 7, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43,
> __dsh = 0, edi = 3221222460, esi = 1073834852, ebp = 3221222248, esp =
> 3221222080, ebx = 134522336, edx = 1635282324, ecx = 4, eax = 134517747,
> trapno = 14, err = 4, eip = 134516109, cs = 35, __csh = 0, eflags = 66050,
> esp_at_signal = 3221222080, ss = 43, __ssh = 0, fpstate = 0xbffff040,
> oldmask = 2147483648, cr2 = 1635282324}) at signals.c:97
> #8 <signal handler called>
> #9 0x08048d8d in DataFill (Arb=0x8698a40, typ=0x804938d "e") at
> Range.cpp:53
> #10 0x08048feb in main () at Range.cpp:77
> #11 0x413ac177 in __libc_start_main (main=0x8048f10 <main>, argc=1,
> ubp_av=0xbffff43c, init=0x8048930 <_init>, fini=0x8049290 <_fini>,
> rtld_fini=0x4000e184 <_dl_fini>, stack_end=0xbffff42c) at
> ../sysdeps/generic/libc-start.c:129
>
> My source code is ( see attachments) :
>
> struct EnergyLossData {
> double energy;
> double dedx;
> double range;
> };
>
> void DataFill(TTree* Arb, const char* typ)
> {
> static char* MCPATH = "MCPATH";
> char* datapath = getenv(MCPATH);
> char* filename;char line[45];
> EnergyLossData ElData; double a1,a2;
> FILE* dat;
>
> if (datapath == NULL) {
> fprintf(stderr,"Environment variable %s is not defined.\n",MCPATH);
> fprintf(stderr,"Make %s point to the directory which holds all data
> tables for de/dx, etc..\n",MCPATH);
> exit(2);
> }
> if ( strcmp(typ,"e") == 0 ) {
> sprintf(filename,"%s/electron_loss.dat",datapath);a2=
> ELEC_MASS;printf("%s\n",filename);fflush(stdout);}
> else if ( strcmp(typ,"m") == 0) {
> sprintf(filename,"%s/muon_loss.dat",datapath);a2 =
> MUON_MASS;printf("%s\n",filename); fflush(stdout);}
> else {
> fprintf(stderr,"Option %s not recognized\n",typ);
> fprintf(stderr,"Exiting to system\n");
> exit(2);
> }
> dat = fopen(filename,"r");
> Arb->Branch("Energy",&ElData.energy,"Energy/D");
> Arb->Branch("Dedx",&ElData.dedx,"Dedx/D");
> Arb->Branch("Range",&ElData.range,"Range/D");
> if (dat != NULL)
> {
> while ( fgets(line,45,dat)) {
> sscanf(&line[0],"%lG",&a1);
> ElData.energy = a1 + a2;
> sscanf(&line[9],"%lG",&ElData.dedx);
> sscanf(&line[19],"%lG",&ElData.range);
> printf("%lG %lG %lG\n",ElData.energy,ElData.dedx,ElData.range);
> fflush(stdout);
> Arb->Fill();
> }
> Arb->Print();
> //Arb->Write();
> fclose(dat);
> }
> }
>
> int main()
> {
> TFile* f1 = new TFile("elec.root","recreate");
> TTree* t1 = new TTree("elec_loss","Energy loss table for electrons");
> DataFill(t1,"e");
> t1->Write();
> f1->Write();
> f1->Close();
> TFile* f2 = new TFile("muon.root","recreate");
> TTree* t2 = new TTree("muon_loss","Energy loss table for muons");
> DataFill(t2,"m");
> t2->Write();
> f2->Write();
> f2->Close();
> return 0;
> }
>
> I am quite puzzled (problem with pthread ?).
> Do you have any idea what I am doing wrong ?
>
> Thanking you in advance,
>
> Yours
>
> Maximilien Fechner
>
> --------------------------------------------------------------------------------
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> Encoding: BASE64
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