We are using a fuzzing method in ClickHouse that involves sending signals to random threads: https://github.com/ClickHouse/ClickHouse/blob/master/src/Common/Thr

We are using a fuzzing method in ClickHouse that involves sending signals to random threads: https://github.com/ClickHouse/ClickHouse/blob/master/src/Common/ThreadFuzzer.h https://github.com/ClickHouse/ClickHouse/blob/master/src/Com... We immediately found bugs in many dependent libraries of one of three types: 1. A library does not check for EINTR. 2. A library that waits for something does check for EINTR but does not update a timeout, therefore stopping sooner than needed. 3. A library that waits for something does check for EINTR but incorrectly updates a timeout and waiting indefinitely.