[PATCH RFC] fork: remove cygpid.N sharedmem on fork failure
Michael Haubenwallner
michael.haubenwallner@ssi-schaefer.com
Tue Jun 5 13:05:00 GMT 2018
Hi,
I'm using attached patch for a while now, and orphan cygpid.N shared memory
instances are gone for otherwise completely unknown windows process ids.
However, I do see defunct processes now which's PPID does not exist (any more),
causing the same trouble because their windows process handle is closed but
their cygpid.N shmem handle is not.
For example, there is no PID 1768 anywhere, although it is the parent of both
the <defunct> processes:
$ ps -e
PID PPID PGID WINPID TTY UID STIME COMMAND
2416 1 1496 2416 ? 197610 May 25 /usr/bin/python2.7
560 1 560 560 ? 197613 May 25 /usr/bin/cygrunsrv
2348 1 2348 2348 ? 197612 May 25 /usr/bin/cygrunsrv
1132 1 1132 1132 ? 197612 May 16 /usr/bin/cygrunsrv
440 2028 440 740 pty0 197609 May 29 /tools/haubi/gentoo/test/usr/bin/bash
3664 1768 3612 3664 ? 197610 12:25:01 /usr/bin/python2.7 <defunct>
2852 2704 2852 2364 ? 197612 May 25 /usr/sbin/sshd
2268 560 2268 2128 ? 197613 May 25 /usr/libexec/sendmail
2968 1768 3612 1500 ? 197610 12:25:01 /usr/bin/tail <defunct>
S 2832 512 2832 2312 pty0 197609 10:57:51 /usr/bin/vim
2028 2852 2028 2000 pty0 197609 May 25 /usr/bin/bash
1164 1132 1164 1256 ? 197612 May 16 /usr/sbin/cron
512 440 512 1544 pty0 197609 May 29 /tools/haubi/gentoo/test/usr/bin/bash
3264 512 3264 1488 pty0 197609 12:43:35 /usr/bin/ps
2704 2348 2704 2856 ? 197612 May 25 /usr/sbin/sshd
That missing 1768 process for sure was started as (grand) children of 2416.
Problem is again that another fork'ed child processes with PID 1768, 2968, 3612
and probably others fail to initialize.
But I have no idea whether attached patch is causing or uncovering this issue...
Any idea?
Thanks!
/haubi/
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