Termination imminent step under z/OS UNIX

In a POSIX(ON) environment, Language Environment’s termination imminent step takes place as described in Termination imminent step, with one exception: the behavior of the TERMTHDACT runtime option. If POSIX(ON) is set, TERMTHDACT takes effect only if enclave termination results from a program check or abend, not from signal generating functions such as CEESGL, raise(), kill(), pthread_kill(), killpg() or sigqueue().