Re: core man page %e

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Hi Mtk,

BTW, if I add "%P-%e-%s.core" every core starts with the same
"P1000-"

The man page shows:
 %P  PID of dumped process, as seen in the initial PID namespace
               (since Linux 3.12)

Do you see similar? I was only needing something to make the filename unique, so %t is enough.

Cheers, Jonny


On 30/05/2020 11:39, Jonny Grant wrote:
Hello mtk

I've noticed "%e-%s.core" often gives something other than the filename and the name is truncated to 16 bytes:-

ThreadPoolServi-5.core
Chrome_InProcUt-5.core

This was set:
sysctl -w kernel.core_pattern="%e-%s.core"



In multithreaded applications it looks like %e is giving something other than the filename, perhaps a thread entry-point symbol name.

https://www.man7.org/linux/man-pages/man5/core.5.html

            %e  executable filename (without path prefix)

Could this be updated to:

            %e  executable filename or thread name truncated to 16 bytes

Cheers, Jonny



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