>>>>> On Mon, 21 Nov 2011 10:28:56 +0100, Sascha Van Cauwelaert said:
>
> Hello everybody,
>
> I am using SWIG to generate CFFI code to be used into LispWorks 6. The
> interface is between C++ and Common Lisp. Then, I try to call that function
> from LispWorks :
>
> std::string test() {
> freopen ("/tmp/mystdout.txt","w",stdout);
> freopen ("/tmp/mystderr.txt","w",stderr);
> std::cout << "Redirected stdout." << std::endl;
> std::cerr << "Redirected stderr." << std::endl;
>
> GRelation testgr(3);
>
> std::cout << "test ! " << std::endl;
> std::cerr << "test cerr! " << std::endl;
> std::cout << testgr.arity() << std::endl;
> std::cerr << testgr.arity() << std::endl;
> std::cout << "test after! " << std::endl;
> std::cerr << "test cerr after! " << std::endl;
> std::stringstream os;
> os << testgr << std::endl ;
> return os.str();
> }
>
> As you can see, I just create one object and print lots of stuff, including
> an object attribute. Everything I print before trying to print the attribute
> prints ok in the redirected outputs. The attribute is not printed and
> nothing else afterwards. I also get the following error when I add testgr to
> the stringstream os :
>
> lispworks-personal-6-0-1-macos-universal(52881,0xb0314000) malloc: *** error
> for object 0x17be20f8: pointer being freed was not allocated
>
> This is what happen in LispWorks. If I compile directly in C++, no
> problem. If I use SBCL (other Common Lisp implementation) instead of
> LispWorks, everything works correctly ! The problem is that I have to use
> LispWorks ...
>
> Does anybody has had a similar problem ? I guess I am not the only one who
> tried to call some C++ from LispWorks. Any clue is very welcome. I think
> maybe the problem can be linked to the garbage collection from LispWorks but
> I don't know much about this.
>
> I thank you in advance for your help, I am really stuck here.
I don't see how garbage collection can cause it, because malloc is not
affected by the LispWorks GC (unless something is doing bad things with
finalization routines).
--
Martin Simmons
LispWorks Ltd
http://www.lispworks.com/
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