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Subject: Re: recreate_mmaps_after_fork_failed errors post-11-30 snapshot
Date: Wed, 14 Dec 2005 20:07:58 -0600
Message-ID: <6BA1E81A2D5EA14D8F43074EC2C91666819F55@MSPM1BMSGM11.ent.core.medtronic.com>
From: "Van Sickle, Gary" <gary DOT van DOT sickle AT medtronic DOT com>
To: <cygwin AT cygwin DOT com>
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> From: Corinna Vinschen <corinna-cygwin at cygwin dot com>
> On Dec 14 15:00, Van Sickle, Gary wrote:
> > OK, lessee what I missed:
> 
> The error message content.  When fixup_mmaps_after_fork fails, there's
> a message in your window which gives at least some details for a
start.
> 

"
$ tar --help
C:\cygwin\bin\bash.exe (3360): *** recreate_mmaps_after_fork_failed
Hangup
"

The number in parens changes with every attempted invocation of any
program, everything else stays the same.

> And why didn't you try strace?

Because:

- I didn't think of it.
- There is no mention of a requirement to do so before reporting a
potential issue on http://cygwin.com/problems.html.
- I'm at work, where I'm paid to do things other than debug Cygwin
snapshots.
- I thought an straceless bug report was better than no bug report at
all.

>  This would give a lot more details which
> might help to track this down, practically everything with the words
> "mmap" in it would be helpful.
> 

"
$ strace tar --help
C:\cygwin\bin\bash.exe (3476): *** recreate_mmaps_after_fork_failed
Hangup
"

From a cmd.exe prompt:

"
H:\>strace bash | grep mmap
  150   33277 [main] bash 2992 mmap64: addr 0, len 1376256, prot 3,
flags 22, fd
 -1, off 0
  495   33772 [main] bash 2992 mmap64: 0x189F0000 = mmap()
bash-3.00$ tar --help
   43 25299558 [main] bash 3556 fixup_mmaps_after_fork: fd -1, h 0x1,
address 0x
189F0000, len 0x150000, prot: 0x3, flags: 0x22, offset 0
 3219 25302777 [main] bash 3556 fixup_mmaps_after_fork: succeeded
bash-3.00$ exit
Exit
"

> 
> Corinna
> 
> -- 
> Corinna Vinschen                  Please, send mails regarding Cygwin
to
> Cygwin Project Co-Leader          cygwin AT cygwin DOT com
> Red Hat

-- 
Gary R. Van Sickle
Contract EE
Medtronic MRI DI/PE Team


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