Is it possible to get a core dump of a running process and its symbol table?

Question

Is it possible to get gdb or use some other tools to create a core dump of a running process and it's symbol table? It would be great if there's a way to do this without terminating the process.

If this is possible, what commands would you use? (I'm trying to do this on a Linux box)

score 87 · Answer 1 · edited Jan 02 '14 at 10:56

87

Or run gcore $(pidof processname).

This has the benefit (over running gdb and issuing commands to the CLI) that you attach and detach in the shortest possible time.

edited Jan 02 '14 at 10:56

iblue

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answered Jan 11 '13 at 13:34

Alex Zeffertt

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score 85 · Accepted Answer · edited May 21 '15 at 14:45

85

$ gdb --pid=26426
(gdb) gcore
Saved corefile core.26426
(gdb) detach

edited May 21 '15 at 14:45

Assaf Lavie

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answered Sep 16 '08 at 00:19

DustinB

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You don't need to set ulimit -c unlimited as gdb doesn't respect it (gdb should always give you the entire core file). You can also do this using the command `gcore pid` from the cli without running gdb. – psanford Jun 13 '12 at 21:21

score 1 · Answer 3 · answered Mar 29 '17 at 16:33

1

You can used generate-core-file command in gdb to generate core dump of running process.

answered Mar 29 '17 at 16:33

dev

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Is it possible to get a core dump of a running process and its symbol table?

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