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The effects of std::terminate() are to call the terminate_handler function in effect immediately after evaluating the throw-expression. The default terminate_handler calls std::abort(), which has the effect of causing abnormal process termination to occur. Abnormal process termination is the typical vector for denial of service attacks. A user-defined terminate_handler may be set by calling std::set_terminate(). In either case, std::terminate() must not return. Attempting to return from a user-defined terminate_handler or from a SIGABRT handler invoked as a result of calling std::abort() leads to undefined behavior.
Consequently, programs should take steps to prevent std::terminate() from being invoked for at least two reasons:
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