Are destructors run when calling exit()? [duplicate]

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No, most destructors are not run on exit().

C++98 ยง18.3/8 discusses this.

Essentially, when exit is called static objects are destroyed, atexit handlers are executed, open C streams are flushed and closed, and files created by tmpfile are removed. Local automatic objects are not destroyed. I.e., no stack unwinding.

Calling abort lets even less happen: no cleanup whatsoever.

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