Mail Archives: cygwin/2003/08/08/13:37:26
On Fri, Aug 08, 2003 at 09:12:45AM -0700, David Rothenberger wrote:
>David Rothenberger wrote:
>>
>> David Rothenberger writes:
>> > "Biederman, Steve" wrote:
>> > >
>> > > I want to allow the users I support to be able to run Cygwin tar on their Windows machines.
>> > > These machines have not had any Cygwin installed; they're just bare Windows machines.
>> > >
>> > > I provided them tar.exe and cygwin1.dll and assumed that with these, they could run
>> > > Cygwin tar sucessfully. It appears that that isn't the case: machines without Cygwin
>> > > installed see different behavior than machines which have it installed. (Running tar
>> > > on machines without Cygwin installed creates incorrect tar archives.)
>> >
>> [snip]
>> > Through experimentation, I discovered that the problem went away if I
>> > created an /etc mount.
>>
>> I did a little debugging on this. It turns out that when tar
>> "hangs", the process is in an infinite loop in malloc_consolidate().
>
>Some googling uncovered that loops in malloc_consolidate() are usually a
>sign of heap corruption. More googling suggested that compiling the
>cygwin dll with --enable-malloc-debugging would be helpful for finding
>heap corruption. But, I'm have quite a bit of trouble getting the dll
>to compile with that configure switch.
That's because it is currently broken. There was a hack posted to get it
working. I think it was to the cygwin mailing list.
cgf
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