Re: "closures" not working on OS X 10.8 (Mountain Lion)?

[Nathan Rajlich <nathan@tootallnate.net>]

So does anybody else have any suggestions for diagnosing this? Things
work fine on Leopard, Snow Leopard, and Lion, just not Mountain Lion.
I'm stumped as for a way to make any progress here.

On Tue, Aug 14, 2012 at 10:23 PM, Nathan Rajlich <nathan@tootallnate.net> wrote:
> Bobby, I believe that that patch has indeed been merged upstream in
> https://github.com/atgreen/libffi/commit/236c9391321f83ad40daf03f40c35c9ebc1da6b3.
> So I guess it's not that.
>
> Reini, that sounded like a good idea to me but it doesn't seem to
> change anything for me. This is what I did:
>
>   $ cd libffi   # still the v3.0.11 tag
>   $ CFLAGS="-Xlinker -no_pie" CXXFLAGS="-Xlinker -no_pie"
> LDFLAGS="-no_pie" ./configure --enable-static --disable-shared
> --disable-builddir --with-pic
>   $ CFLAGS="-Xlinker -no_pie" CXXFLAGS="-Xlinker -no_pie" LDFLAGS="-no_pie" make
>   $ gcc -o closure-test closure.c .libs/libffi.a -Iinclude -Xlinker -no_pie
>   $ ./closure-test
>   Bus error: 10
>
> Andrew, well shucks :)
>
> Anybody else have any ideas?
>
> On Tue, Aug 14, 2012 at 8:18 AM, Reini Urban <rurban@x-ray.at> wrote:
>> On Tue, Aug 14, 2012 at 9:40 AM, Andrew Haley <aph@redhat.com> wrote:
>>> On 08/13/2012 07:28 PM, Nathan Rajlich wrote:
>>>> It seems to me that closures are no longer working on OS X v10.8
>>>> (a.k.a. Mountain Lion). I first noticed this when the node-ffi test
>>>> suite started failing with a "Bus Error", so just now I ran a simple
>>>> closure example from the internet and encounter the same error when I
>>>> try to run that. Note that this is using the libffi v3.0.11 tag. My
>>>> test case and shell session are outlined in this gist here:
>>>> https://gist.github.com/3342783.
>>>>
>>>> I don't personally know what's going on here, but am hoping somebody
>>>> on this list will. I can provide any more additional information
>>>> necessary. Cheers and thanks in advance!
>>>
>>> This is probably because of heap execute protection.  Unfortunately I
>>> don't know how it works on OS X: you need an Apple export.
>>
>> --no_pie is needed.
>>
>> See also http://code.google.com/p/address-sanitizer/issues/detail?id=29
>> how to disable ASLR with various MacOSX versions:
>> e.g. export DYLD_NO_PIE=1 on 10.6
>> link with --no_pie since 10.7
>> --
>> Reini Urban
>> http://cpanel.net/   http://www.perl-compiler.org/