How can I tell in Linux which process sent my process a signal

Question

I have a java application that got SIG TERM. I want to know the pid of the process that sent this signal.
Is that possible?

Answer 1

BCC includes the killsnoop utility. It requires a kernel with BPF support.

Excerpt from killsnoop (8) man-page:

       killsnoop  traces  the  kill()  syscall, to show signals sent via this method. This may be
       useful to troubleshoot  failing  applications,  where  an  unknown  mechanism  is  sending
       signals.

       This  works by tracing the kernel sys_kill() function using dynamic tracing, and will need
       updating to match any changes to this function.

       This makes use of a Linux 4.5 feature (bpf_perf_event_output()); for  kernels  older  than
       4.5, see the version under tools/old, which uses an older mechanism.

       Since this uses BPF, only the root user can use this tool.