Enclave termination

An enclave terminates when one of the following events occurs:

• The last thread in the enclave terminates.
• The main routine in the enclave returns to its caller through an implicit or explicit return.
• An HLL construct issues a request for the termination of an enclave (for example, using the abort(), raise(SIGTERM), _exit(), or exit() functions of C).
• When a severity 2 or greater condition remains unhandled, the thread terminates. When a thread terminates due to an unhandled condition, the enclave also terminates.

When an enclave terminates, Language Environment® releases resources allocated on behalf of the enclave and performs various other activities such as the following

• Language Environment exception handlers are canceled.
• All modules loaded by Language Environment are deleted.
• All storage obtained by way of Language Environment services is freed.
• All Language Environment control blocks for the enclave are freed.
• Return code and reason code are set in R15 and R0, respectively.
• The program mask and registers are restored to their values at the call to enclave initialization.
• Control is returned to the enclave creator.