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If I have a C++11 program running two threads, and one of them throws an unhandled exception, what happens? Will the entire program die a fiery death? Will the thread where the exception is thrown die alone (and if so, can I obtain the exception in this case)? Something else entirely?
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An uncaught exception will cause the thread to exit. When it bubbles to the top of Thread. run() it will be handled by the Thread's UncaughtExceptionHandler. By default, this will merely print the stack trace to the console.
Uncaught exception handler will be used to demonstrate the use of exception with thread. It is a specific interface provided by Java to handle exception in the thread run method. There are two methods to create a thread: Extend the thread Class (java.
If an exception is not caught, it is intercepted by a function called the uncaught exception handler. The uncaught exception handler always causes the program to exit but may perform some task before this happens. The default uncaught exception handler logs a message to the console before it exits the program.
When a thread throws an exception, it is not caught by main.
Nothing has really changed. The wording in n3290 is:
If no matching handler is found, the function
std::terminate()is called
The behavior of terminate can be customized with set_terminate, but:
Required behavior: A
terminate_handlershall terminate execution of the program without returning to the caller.
So the program exits in such a case, other threads cannot continue running.
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