I'm trying to do these things simultaneously:
use glib
use gc (Hans-Boehm)
use my own library of random code
I dont want to have to do manual garbage collection at least in the prototype stage.
However, I haven't found a way to link the above together that works.
I use the set_vtable function in glib to hopefully make it use the GC_malloc etc. from gc
I include fcnts malloc/free/realloc in my library and the compiler/linker doesn't complain
(presumably libc contains some special goop to not complain about these getting redefined
in client code). My malloc etc. of course just call GC_* fctns.
I believe I have all the right -I -L -Wl,-rpath etc. crud.
When I look at bins and my .so file with ldd everything appears to look for the correct libraries.
When I use nm on my .so I see symbols like malloc supposedly in the text secion (marked with T).
When I step with the debugger and a breakpoint in malloc (or realloc etc.) I always end up in the malloc
in my library, not the system malloc.
And yet, the program always seg faults eventually in a GC_malloc.
Any ideas what I'm missing, or is the whole approach somehow fatally flawed?
I've also tried using --wrap linker option, but it seemed to only map function defined in the source files being linked and
didn't affect the use of malloc etc. by depended-on libraries (I ultimately need this to work for gsl (GNU scientific library as well not only glib which provides the set_vtable functionality).
Thanks,
Britton
