PGI User Forum

[Nebojsa]

I'm using pgilinux.904 on OpenSuse 11.1 and performing pgf90 on one script. After fortran stops in the middle of the script I get response Segmentation fault. Script is tested on other linux versions and pgi workstations and works correct. Could my problem be caused by some execution time limit?

Thanks

Nebojsa

[mkcolg]

Hi Nebojsa,

What signal are you getting?

If it's a signal 9 (kill), then yes you could have a execution time limit set on your system that would cause a time out. Though, a signal 9 could also mean that OS killed your process due to other reasons such as running the system running out of memory.

If it is a seg fault (signal 11), then the signal would be coming from process you're running, and not a time out.

- Mat

[Nebojsa]

Hi Mat,

Here's the output when this script stops to work:

./new_prep.sh: line 92: 7514 Segmentation fault ../exe/initbc.exe > initbc.out
value of err is 139
BAILING OUT BECAUSE SOMETHING FAILED!!!!!!!!!

[mkcolg]

Hi Nebojsa,

A segmentation violation generally occurs when your program attempts to access memory it does not have permission to access. Common causes are de-referencing a null pointer, writing past the end of an array (out-of-bounds errors), or using un-initialized pointer variables.

As to the specific reason why your program is seg faulting, the only way to tell is to use a debugger like PGDBG or gdb. (See: http://www.pgroup.com/doc/pgitools.pdf for more information about PGDBG).

While learning how to debugging can take time (but well worth the time!), the simplest thing to do is run:

[Nebojsa]

Thanks Mat, I'll try what you suggested and inform you about the results.

Best regards!

Nebojsa