CODEWITHSUNDEEP
clinuxcoredump
Shraddha
Shraddha

Reputation: 2579

How to enable program to dump core on linux?

I want the program to dump core on crash on Linux for debugging purpose. How do I enable this feature - does this require any changes in the program ?

Upvotes: 3

Views: 987

Answers (4)

KernelMonk
KernelMonk

Reputation: 341

In addition to Troy's answer you will have to add to e/etc/sysctl.conf - where and how you need to core to be generated - like this :

kernel.core_uses_pid=1
kenrel.core_pattern= /tmp/cores/core-%e-%p-%u-%g-%s-%t
fs.suid_dumpable=2

Upvotes: 2

HungMingWu
HungMingWu

Reputation: 21

If your program is user-mode program. Here is a brief tutorial.

Set the core file size to maximum

ulimit -c unlimited

Run your program

$ ./your_program

Segmentation fault (core dumped)

It would generate core dump file. Use gdb to analyze the core dump

gdb ./your_progrm core

You can reference How to Debug Using GDB for more information.

Upvotes: 2

goji
goji

Reputation: 7132

You can either enable it for yourself by doing:

ulimit -c unlimited

If you want this to be persistent put it in ~/.profile

Alterantively, you can enable core dumps for all users on the system put the following line in /etc/sercurity/limits.conf (at least on ubuntu):

*   0  core    -1

Upvotes: 7

louxiu
louxiu

Reputation: 2915

Whether generate core dump or not is controlled by the shell

If you use bash.

ulimit -c unlimited

Upvotes: 2

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