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Empty core dump file after Segmentation fault

Asked 2012-11-15T18:28:14.903
21

I am running a program, and it is interrupted by Segmentation fault. The problem is that the core dump file is created, but of size zero.

Have you heard about such a case and how to resolve it?

I have enough space on the disk. I have already performed ulimit -c unlimited to unlimit the size of core file - both running it or putting on the top of the submitted batch file - but still have 0 byte core dump files. The permissions of the folder containing these files are uog+rw and the permissions on the core files created are u+rw only.

The program is written by C++ and submitted on a linux cluster with qsub command of the Grid Engine, I don't know this information is relevant or not to this question.

linux debugging segmentation-fault coredump sungridengine
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7

It sounds like you're using a batch scheduler to launch your executable. Maybe the shell that Torque/PBS is using to spawn your job inherits a different ulimit value? Maybe the scheduler's default config is not to preserve core dumps?

Can you run your program directly from the command line instead?

Or if you add ulimit -c unlimited and/or ulimit -s unlimited to the top of your PBS batch script before invoking your executable, you might be able to override PBS' default ulimit behavior. Or adding 'ulimit -c' could report what the limit is anyway.

answered 2012-11-16T05:32:33.237

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