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Re: Help debugging a dll issue
- From: Renà Berber <rene dot berber at gmail dot com>
- To: cygwin at cygwin dot com
- Date: Sat, 21 May 2016 20:45:26 -0500
- Subject: Re: Help debugging a dll issue
- Authentication-results: sourceware.org; auth=none
- References: <b21c0ab1-341b-d6f5-915b-f73973b8079b at cs dot umass dot edu> <830e7bcd-aeb5-264e-6436-799dfa54d7a0 at cs dot umass dot edu>
- Reply-to: Do not reply <rene dot berber at gmail dot com>
On 5/21/2016 6:30 PM, Eliot Moss wrote:
[snip]
> I used binary search, eliminating .o files from the .dll on the thought
> that it was either a particular .o file that was leading to a problem,
> or possibly the overall size (this is a huge link!). I found that a .dll
> with 58725 section 1 symbols (as reported by objdump -t) works, and one
> with 66675 section one symbols fails. So it appears to be a size issue.
That's telling, since USHRT_MAX (65535) may be the limit, then somewhere
there is the use of a variable of that type (unsigned short int,
uint16_t), which may be part of some specification (i.e. the format of
libraries).
Supporting that is: https://ghc.haskell.org/trac/ghc/ticket/5292 which
mentions:
"65536 symbols. This is the limit that Windows DLLs can handle (the
source of the limitation is that they use 16-bit integers to represent
"ordinals")"
and also point to an interesting bug report (5 years old):
https://sourceware.org/bugzilla/show_bug.cgi?id=12969
No answers, but at least an explanation.
--
Renà Berber
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