What causes termination

Under Language Environment, an application terminates when any of the following conditions occur:

The last thread in the enclave terminates (which in turn terminates the enclave).
The main routine in the enclave returns to its caller.
An HLL construct issues a request for the termination of an enclave, for example:
- C's abort() function
- C's raise(SIGTERM) function
- C's _exit() function
- C's exit() function
A default POSIX signal is received, where the default is termination.
An abend is requested by the application (that is, the application calls __cabend()).
An unhandled condition of severity 2 or greater occurs. (See Termination behavior for unhandled conditions for information.)