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Re: cygwin-1.7.10-1 fork - address space needed by ... already in use
On Mar 5 13:02, Denis Excoffier wrote:
> On Mon, Mar 05, 2012 at 10:59:19AM +0100, Corinna Vinschen wrote:
> >> On Mar 5 08:09, Denis Excoffier wrote:
> >> > 947 [main] sh 660! _pinfo::dup_proc_pipe: something failed for pid 0: res 660, hProcess 0x6C8, wr_proc_pipe 0x758 vs. 0x758, Win32 error 5
> >> > 2 [main] sh 3360! _pinfo::dup_proc_pipe: something failed for pid 0: res 3360, hProcess 0x6BC, wr_proc_pipe 0x758 vs. 0x758, Win32 error 5
> >> > 1345 [main] sh 3772! _pinfo::dup_proc_pipe: something failed for pid 0: res 3772, hProcess 0x6CC, wr_proc_pipe 0x758 vs. 0x758, Win32 error 5
> >> > [...]
> >>
> >> Actually, I don't quite understand them. The pid is apparently not
> >> initialized yet, at the time the message occurs. The code in question
> >> tries to duplicate a pipe handle into another process and fails. But
> >> the process handle to the other has been created by this process, so it
> >> should have all rights to duplicate the handle. Hmm. What command
> >> were you running at the time? Maybe it is reproducible.
> You mean, may be it is debuggable?
>
> Please first apply the following, and provide me with further
> instrumentation in order that i can narrow down the problem when it
> occurs.
>
> *** winsup0/cygwin/pinfo.cc Wed Feb 15 15:46:18 2012
> --- winsup/cygwin/pinfo.cc Mon Mar 5 12:53:30 2012
> ***************
> *** 1001,1007 ****
> {
> wr_proc_pipe = orig_wr_proc_pipe;
> warn_printf ("something failed for pid %d: res %d, hProcess %p, wr_proc_pipe %p vs. %p, %E",
> ! res, pid, hProcess, wr_proc_pipe, orig_wr_proc_pipe);
> }
> else
> {
> --- 1001,1007 ----
> {
> wr_proc_pipe = orig_wr_proc_pipe;
> warn_printf ("something failed for pid %d: res %d, hProcess %p, wr_proc_pipe %p vs. %p, %E",
> ! pid, res, hProcess, wr_proc_pipe, orig_wr_proc_pipe);
> }
> else
> {
Thanks for catching! I applied this patch. So the pids are not wrong,
after all. As for debugging, it would be helpful to have a command to
reproduce it. I can't tell you off-hand what to hunt for. This is
Chris' code, so he probably knows much better what to look for than I do.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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