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Full Discussion: Core File Generation
Top Forums UNIX for Dummies Questions & Answers Core File Generation Post 302940973 by Corona688 on Friday 10th of April 2015 11:39:51 AM
Old 04-10-2015
We cannot tell from the mere existence of a core file, why the core file was created.

You could load it in gdb, see what caused it to crash. This may be more puzzling than illuminating if it really did crash.

The core is probably a sparse file -- the same length as your computer's address space, but strewn with empty holes which cause the file's actual size on disk to be somewhat smaller. Check it with du.
Code:
ls -lh filename
du -hs filename

 

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GCORE(1)						      General Commands Manual							  GCORE(1)

NAME
gcore - get core image of running process SYNOPSIS
gcore [-s][-c core] pid DESCRIPTION
gcore creates a core image of each specified process, suitable for use with adb(1). By default the core image is written to the file <pid>.core. The options are: -c Write the core file to the specified file instead of <pid>.core. -s Stop the process while creating the core image and resume it when done. This makes sure that the core dump will be in a consistent state. The process is resumed even if it was already stopped. Of course, you can obtain the same result by manually stopping the process with kill(1). The core image name was changed from core.<pid> to <pid>.core to prevent matching names like core.h and core.c when using programs such as find(1). FILES
<process-id>.core The core image. BUGS
If gcore encounters an error while creating the core image and the -s option was used the process will remain stopped. Swapped out processes and system processes (the swapper) may not be gcore'd. 4.2 Berkeley Distribution April 15, 1994 GCORE(1)
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