No error when macro crashes

ROOT
1

Hi,

I’m writing a macro that uses a 2D array. But the program just stops when declaring the array. There’s no error or seg fault message. This is how I start the macro:

root -q ‘analysis/particleIDAnl/findLightSpread.C++(,,size)’

Here’s the relevant code:

[code]
// headers

void findLightSpread(const char* infile, const char* outfile, const int size) {

…

const int fiberNum = 768;
const int numOfVoxels = sizesizesize;

Double_t totalPE[fiberNum][numOfVoxels];

for(int i=0;i<numOfVoxels;i++)
for(int j=0; j<fiberNum;j++)
totalPE[i][j] = 0;

…
}[/code]

The macro stops at the line: Double_t totalPE[fiberNum][numOfVoxels];

Here’s the output. The warnings are due to the header files:

[quote]-bash-3.2$ root -q 'analysis/particleIDAnl/findLightSpread.C++(“scibathMC/output/Ialpha_1.root”,“analysis/particleIDAnl/spreadFun1.root”,16)'
Loading SciBath Root Utilities
include path: -I/usr/local/share/cern/root/5.27.02/include -I/nfs/festus/home/lorebeni/ScibathCode/scibathAnl/install/include
root [0]
Processing analysis/particleIDAnl/findLightSpread.C++(“scibathMC/output/Ialpha_1.root”,“analysis/particleIDAnl/spreadFun1.root”,16)…
Info in TUnixSystem::ACLiC: creating shared library /nfs/festus/home/lorebeni/ScibathCode/scibathAnl/./analysis/particleIDAnl/findLightSpread_C.so
/nfs/festus/home/lorebeni/ScibathCode/scibathAnl/install/include/SBHitInformation.h:40: warning: unused parameter ‘i’
/nfs/festus/home/lorebeni/ScibathCode/scibathAnl/install/include/SBClasses.h:55: warning: unused parameter ‘i’
-bash-3.2$
[/quote]

There’s supposed to be an output file, but that file is not created, so I know the program is stopping at that line. What would cause this?

reben

2

Nothing in the “output”, that you show in your post, suggests that your macro “died” in any way.

Try to add some “debug” lines, e.g.: std::cout << "Before totalPE" << std::endl << std::flush; Double_t totalPE[fiberNum][numOfVoxels]; std::cout << "After totalPE" << std::endl << std::flush;
There is just one possible problem in the line that you suspect.
Your “Double_t totalPE[768][161616];” is 24MB long.
It is possible that this exceeds your stack size “limit”. Try:
[bash]$ ulimit -S -a
[bash]$ ulimit -H -a
[tcsh]$ limit
[tcsh]$ limit -h
If this is the case, try (note: your new “soft limit” cannot be higher than the “hard limit”):
[bash]$ ulimit -S -s 32768
[tcsh]$ limit stacksize 32768
and then try to run your “root -q …” command again.