On Fri, 08 Apr 2022 00:53:31 +0300 Alexey Izbyshev wrote: > Hi, > > I'm using 32-bit Cygwin 3.3.4 on 64-bit Windows 10 21H2. When running > parallel make (for testing my project), very rarely I get the whole > process tree hanging at some seemingly random point. An example of such > a tree: > > make-+-make-+-bash---find > | |-bash---find > | |-bash---find > | |-bash---find > | |-bash---find > | `-bash---javac > `-make-+-bash---bash---bash---readlink > `-bash---bash---bash-+-grep > `-grep > > (In the above tree, javac is the zombie parent of a native javac, and > the latter doesn't exist at this point). > > I got such hang two times while running make in a loop for several days. > ProcessHacker shows that all leaf processes are single-threaded and are > stuck on WaitForSingleObject(). > > I've skimmed git log of cygwin-3_3-branch after cygwin-3_3_4-release, > but couldn't find anything that seems definitely related. > > Has anybody seen something like this? > > Is there any way I can get useful data for diagnosing this hang from the > process tree that I currently have hanging (I'm going to keep it for > now)? Otherwise, what would be the best strategy?
Attaching gdb to the hanging process and dumping stack by 'bt' command for each thread may diagnose more detail. -- Takashi Yano <takashi.y...@nifty.ne.jp> -- 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
