Re: debugging SIGSEV on pclose

[Marco atzeri <marco dot atzeri at gmail dot com>]

On 9/8/2011 4:27 PM, Christopher Faylor wrote:
> On Thu, Sep 08, 2011 at 04:15:47PM +0200, Marco atzeri wrote:

> > Question:
> > is a mistake in pclose to assume that fh could be invalid
>
> I'm not sure what you're asking here.  It's not a mistake to assume that
> pclose is being passed a valid fp.  Linux also crashes if the fp is
> closed twice.

Just as I noticed earlier on syscall.cc a defensive approuch

-----------------------------------------------
close_all_files (bool norelease)
{
  cygheap->fdtab.lock ();

  semaphore::terminate ();

  fhandler_base *fh;
  HANDLE h = NULL;

  for (int i = 0; i < (int) cygheap->fdtab.size; i++)
    if ((fh = cygheap->fdtab[i]) != NULL)
      {
------------------------------------------------

> > or something is just trashing cygheap->fdtab ?
>
> Who knows?  strace should show if the fp is closed twice.
>
> cgf

correct, it looks I have two close in excess for fd 5 and 6

Thanks
Marco



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