Signal catching info from the kernel level

 Hello experts,

I wanted to track down the root cause for the "JVM called WLS shutdown hook" in weblogic server from the OS perspective.

I know that this  problem happens when a wrong shutdown signal is sent by some component to the JVM and the JVM catches those signals, and shutdowns all Java processes.

We have a workaround available to use -Xrs as the option.

So my question is how to trace the component or the process that had sent that shutdown signal to the weblogic process for shutdown.

is there any script available to monitor the signals in the solaris OS,as we can schedule it in the cron job for later analysis.