Linux - how to find who send the sigterm signal to my process

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my process receive a SIGTERM signal, I used the API sigaction to get the sender.
But the sender is not exist in the system(after I got its pid).It seems the sender exit after sending the signal.
I want to know who is the sender, why it send a SIGTERM to me.

What I have tried:

The process is big, strace will not work.

Posted 6-Jul-16 17:00pm

LubinLew

Updated 6-Jul-16 21:46pm

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Jochen Arndt · Answer 1 · 2016-07-06T21:45:00

If a process has been terminated the PID is removed from the process table and you won't be able to get any informartion about the process.

If you want to investigate which process is killing yours, you can use a process monitoring tool that logs all processes that are started and stopped with their PID. Candidates might be pidstat(1): Report statistics for tasks - Linux man page[^], psacct / acct and sar.