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multithreadingunixsignals
Leon
Leon

Reputation: 8521

multi-threaded signal handling

  1. In unix, If a multi-threaded process was sent a signal, which thread will be the one to execute the handling function?

  2. if it is a multi-cpu machine, more than 1 thread is running at the same time. which thread will be the on to run the signal handling function?

Upvotes: 11

Views: 3083

Answers (1)

Jonathan
Jonathan

Reputation: 13624

According to man 7 signal, all threads in the process share the same signal handler, and if a signal is delivered to a process with multiple threads that have not blocked the signal, one of them is arbitrarily chosen to receive it.

Having a multi-CPU machine will not change these semantics.

Upvotes: 11

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