In order to enable the creation of a coredump file when a program crashes in the compute node of a CRAY system like Darter, the following command should be added to the job script before the aprun call:
|Bourne shell||ulimit -c unlimited|
|C shell||limit coredumpsize unlimited|
For example if using a Bourne like job scrip, the script will look like:
#PBS MY_PROJECT #PBS -l size=16,walltime=00:05:00 #PBS -S /bin/bash cd $PBS_O_WORKDIR ulimit -c unlimited aprun -n 4 ./helloWorld
In the previous example, if program 'helloworld' crashes (for example, due a segmentation fault), a coredump file named 'core' will be created in the same directory where the program is located.
Note: Using the compiler option '-g' at compile time, will add debugging information to the executable that will facilitate figuring out the location in the source code where the program crashed.