On Jul 18 00:44, Takashi Yano via Cygwin wrote: > On Thu, 17 Jul 2025 17:19:49 +0200 > Corinna Vinschen wrote: > > On Jul 17 23:14, Takashi Yano via Cygwin wrote: > > > Hi Corinna, > > > > > > On Wed, 16 Jul 2025 17:36:42 +0200 > > > Corinna Vinschen wrote: > > > > On Jul 16 23:52, Takashi Yano via Cygwin wrote: > > > > > Do you have any idea? > > > > > > > > Locking would be super-simple. > > > > > > > > But theoretically it should be possible to use a local child_info_spawn > > > > variable at this point. The ch_spawn child_info_spawn instance is not > > > > copied to the child anyway, so that should be safe. The same goes for > > > > posix_spawn() then, btw. > > > > > > > > I checked the sources and I don't see any dependency to ch_spawn > > > > from a spawning process, in contrast to an exec'ing process. That > > > > doesn't mean there is none, just that I didn't find any. > > > > > > Thanks! > > > As a starting point, I tried tntroducing locking. It almost works > > > as expected, however, sometimes my STC in my first report is hangs > > > if N is large e.g. 100. The patch is as attached. > > > > > > What am I missing? > > > > I don't know. You're perhaps not releasing the lock in all cases. > > But I would have to debug this just like you ¯\_(ツ)_/¯ > > > > Out of curiosity, did you try using a locale child_info_spawn instance > > instead? That would be a rather nice solution, but I'm pretty sure > > there's some other problem lurking in the dark... > > I'm not sure what to do with local child_info_spawn. > Some of other modules refer to ch_spawn, such as exception.cc and > pinfo.cc. Also, has_execed* uses ch_spawn. What should we do for that?
Yes, that's what I meant with my above paragraph, i.e. > > > > I checked the sources and I don't see any dependency to ch_spawn > > > > from a spawning process, in contrast to an exec'ing process. That > > > > doesn't mean there is none, just that I didn't find any. These external dependencies *should* only be of interest when performing an execve, but not when performing a spawnve. Corinna -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
