On 8/2/21 6:22 AM, Ævar Arnfjörð Bjarmason wrote: ...
If anything the existing Windows version seems a bit unweildy, having to apparently deal with cycles etc., I don't think that happens under procfs, but maybe I'm missing some special-case.
It's been a while since I did the parent lookup on Windows, but... Yes, on Windows we observed cases where a PID would be recycled and a child process could have the same PID as an ancient ancestor that had long since exited. I don't think the cycle problem exists on Unix because IIRC a child process' parent-PID is set to Init when the parent exits. Windows does not update the child's parent-PID when the parent exits, so if a recently-used PID is given to one of our child processes, we can get a loop. Jeff
