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Cygwin: FIFO: close connect_evt handles as soon as possible

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Keeping them open too long can cause an attempt to close them twice
after a fork or exec.
This commit is contained in:
Ken Brown
2019-04-20 11:31:08 -04:00
parent 24c56e5a2c
commit 252cd0ce2b
1 changed files with 10 additions and 7 deletions
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17
winsup/cygwin/fhandler_fifo.cc
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@@ -363,6 +363,7 @@ fhandler_fifo::listen_client_thread ()
break;
}
}
HANDLE evt = NULL;
switch (status)
{
case STATUS_SUCCESS:
@@ -371,6 +372,9 @@ fhandler_fifo::listen_client_thread ()
fc.state = fc_connected;
nconnected++;
set_pipe_non_blocking (fc.fh->get_handle (), true);
evt = InterlockedExchangePointer (&fc.connect_evt, NULL);
if (evt)
CloseHandle (evt);
fifo_client_unlock ();
break;
case STATUS_PIPE_LISTENING:
@@ -400,6 +404,8 @@ fhandler_fifo::listen_client_thread ()
}
}
out:
if (ret < 0)
debug_printf ("exiting lct with error, %E");
ResetEvent (read_ready);
return ret;
}
@@ -829,14 +835,15 @@ int
fifo_client_handler::close ()
{
int res = 0;
HANDLE evt = InterlockedExchangePointer (&connect_evt, NULL);
if (evt)
CloseHandle (evt);
if (fh)
{
res = fh->fhandler_base::close ();
delete fh;
}
if (connect_evt)
CloseHandle (connect_evt);
return res;
}
@@ -913,11 +920,7 @@ fhandler_fifo::dup (fhandler_base *child, int flags)
if (!DuplicateHandle (GetCurrentProcess (), fc_handler[i].fh->get_handle (),
GetCurrentProcess (),
&fhf->fc_handler[i].fh->get_handle (),
0, true, DUPLICATE_SAME_ACCESS)
|| !DuplicateHandle (GetCurrentProcess (), fc_handler[i].connect_evt,
GetCurrentProcess (),
&fhf->fc_handler[i].connect_evt,
0, true, DUPLICATE_SAME_ACCESS))
0, true, DUPLICATE_SAME_ACCESS))
{
CloseHandle (fhf->read_ready);
CloseHandle (fhf->write_ready);