Hi Takashi, Can your fix for flock (8f551af4f) also fix a similar issue between processes? I figure that if Cygwin uses some kind of shared memory to handle locking/inodes/..., then the issue that I had between threads would also apply between processes.
There is a new test in MSYS2 fish that trigger something very similar to the old issue but across processes this time: - one application is blocked with this stacktrace: ======== Thread 1 (Thread 15116.0x8304 "fish"): #0 0x00007ffb525c1c44 in ntdll!ZwWaitForSingleObject () from /c/WINDOWS/SYSTEM32/ntdll.dll #1 0x00007ffb4f5e76af in WaitForSingleObjectEx () from /c/WINDOWS/System32/KERNELBASE.dll #2 0x0000000180067731 in lockf_t::create_lock_obj (this=this@entry=0x80000cb50) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:838 #3 0x0000000180069def in lf_setlock (lock=0x80000cb50, node=0x80000c570, clean=0x7ffff42e8, fhdl=<optimized out>) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:1401 #4 fhandler_base::lock (this=<optimized out>, a_op=<optimized out>, fl=<optimized out>) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:1148 #5 0x000000018006a6a4 in flock (fd=4, operation=1) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:1864 #6 0x00000001801ac5b4 in _sigfe () at sigfe.s:35 ... ==== - another is blocked with the following: ==== Thread 1 (Thread 20040.0x75ac "fish"): #0 0x00007ffb525c1c44 in ntdll!ZwWaitForSingleObject () from /c/WINDOWS/SYSTEM32/ntdll.dll #1 0x00007ffb4f5e76af in WaitForSingleObjectEx () from /c/WINDOWS/System32/KERNELBASE.dll #2 0x000000018006703b in inode_t::LOCK (this=0x800015360) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:314 #3 inode_t::get (dev=1881899537, ino=ino@entry=13792273859584895, create_if_missing=create_if_missing@entry=false, lock=lock@entry=true) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:504 #4 0x0000000180068e31 in fhandler_base::del_my_locks (this=0x800013a60, from=on_close) at /d/S/B/src/msys2-runtime/winsup/cygwin/flock.cc:402 #5 0x000000018010d90f in fhandler_base::close_with_arch (this=0x800013a60, flag=flag@entry=-1) at /d/S/B/src/msys2-runtime/winsup/cygwin/fhandler/base.cc:1309 #6 0x00000001800de66b in __close (fd=5, flag=-1) at /d/S/B/src/msys2-runtime/winsup/cygwin/syscalls.cc:1710 #7 close (fd=5) at /d/S/B/src/msys2-runtime/winsup/cygwin/syscalls.cc:1722 #8 0x00000001801ac5b4 in _sigfe () at sigfe.s:35 ... ==== Killing one or the other unblock the remaining one. Thanks, Nahor -- 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
