Segmentation fault when calling TCleanOut::M from SLitrani

[clerian]

Hello!

I’m trying to get SLitrani to work on root 5.32/01, but whenever I try to call one of the functions that decompose a spectrum into gaussians the whole program crashes with a segfault…

According to the backtrace I think this is a Problem with the TCleanOut::M* functions:

Processing GaussDecomp_Spectrum_BC408.C…

*** Break *** segmentation violation

===========================================================
There was a crash.
This is the entire stack trace of all threads:

#0 0x00007f6cd667970e in waitpid () from /lib64/libc.so.6
#1 0x00007f6cd660bf69 in do_system () from /lib64/libc.so.6
#2 0x00007f6cdd436eee in TUnixSystem::StackTrace() () from /usr/local/lib/root/libCore.so
#3 0x00007f6cdd439043 in TUnixSystem::DispatchSignals(ESignals) () from /usr/local/lib/root/libCore.so
#4
#5 0x00007f6cd737b235 in TCleanOut::SetStamp(KindOfMessage) () from /usr/local/root/SLitriani/lib/libPhysMore.so
#6 0x00007f6cd737ccec in TCleanOut::M(KindOfMessage, char const*) () from /usr/local/root/SLitriani/lib/libPhysMore.so
#7 0x000000000044deee in TLitSpectrum::FindPeaks(int, double, double, double, bool, bool) ()
#8 0x0000000000571a85 in G__SLitraniDict_332_0_26(G__value*, char const*, G__param*, int) ()
#9 0x00007f6cdc935b79 in Cint::G__ExceptionWrapper(int ()(G__value, char const*, G__param*, int), G__value*, char*, G__param*, int) () from /usr/local/lib/root/libCint.so
#10 0x00007f6cdc962b61 in G__execute_call () from /usr/local/lib/root/libCint.so
#11 0x00007f6cdc962f60 in G__call_cppfunc () from /usr/local/lib/root/libCint.so
#12 0x00007f6cdc9bdb40 in G__interpret_func () from /usr/local/lib/root/libCint.so
#13 0x00007f6cdc95ee24 in G__getfunction () from /usr/local/lib/root/libCint.so
#14 0x00007f6cdc916e76 in G__getstructmem(int, G__FastAllocString&, char*, int, char*, int*, G__var_array*, int) () from /usr/local/lib/root/libCint.so
#15 0x00007f6cdc90f187 in G__getvariable () from /usr/local/lib/root/libCint.so
#16 0x00007f6cdc9d53d1 in G__getitem () from /usr/local/lib/root/libCint.so
#17 0x00007f6cdc9dbd55 in G__getexpr () from /usr/local/lib/root/libCint.so
#18 0x00007f6cdc9e2f03 in G__getexpr () from /usr/local/lib/root/libCint.so
#19 0x00007f6cdc92bef9 in G__exec_statement () from /usr/local/lib/root/libCint.so
#20 0x00007f6cdc8ec6a2 in G__exec_tempfile_core () from /usr/local/lib/root/libCint.so
#21 0x00007f6cdc8edbdb in G__exec_tempfile () from /usr/local/lib/root/libCint.so
#22 0x00007f6cdca1e454 in G__process_cmd () from /usr/local/lib/root/libCint.so
#23 0x00007f6cdd4011f8 in TCint::ProcessLine(char const*, TInterpreter::EErrorCode*) () from /usr/local/lib/root/libCore.so
#24 0x00007f6cdd3f7883 in TCint::ProcessLineSynch(char const*, TInterpreter::EErrorCode*) () from /usr/local/lib/root/libCore.so
#25 0x00007f6cdd3ab135 in TApplication::ExecuteFile(char const*, int*, bool) () from /usr/local/lib/root/libCore.so
#26 0x00007f6cdd3a9dde in TApplication::ProcessLine(char const*, bool, int*) () from /usr/local/lib/root/libCore.so
#27 0x00007f6cdaa3041c in TRint::Run(bool) () from /usr/local/lib/root/libRint.so
#28 0x000000000042b439 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
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.

#5 0x00007f6cd737b235 in TCleanOut::SetStamp(KindOfMessage) () from /usr/local/root/SLitriani/lib/libPhysMore.so
#6 0x00007f6cd737ccec in TCleanOut::M(KindOfMessage, char const*) () from /usr/local/root/SLitriani/lib/libPhysMore.so
#7 0x000000000044deee in TLitSpectrum::FindPeaks(int, double, double, double, bool, bool) ()

My main concern is that root itself runs without any (serious) problems, as well as the SLitrani demo applications. But whenever I try to generate am emission spectrum for SLitrani this error occurs even if I try to execute one of the provided macros for e.g. In6WOTb.

Has anyone experienced similar problems or does anyone have a workaround?

Thanks in advance,
Clemens

[clerian]

Hello!

I found a brute force solution, in case anyone is experiencing a similar error:

I modified the SLitrani “TLitSpectrum.cpp” source code, in particular I removed all call to the TCleanOut class. This solves the problem, I didn’t experience any other error (apart from the usual crashes). I’ll post my modified version as attachment, all function and class calls that produce the crash are just commented.

Regards,
Clemens
TLitSpectrum.cpp (91.5 KB)