The attached patch adds support for calloc and realloc to the
lttng-ust-libc-wrapper library.

The implementation for calloc is slightly tricky, as dlsym calls calloc
internally, so the library needs to provide a 'dummy' implementation for
calloc to avoid an endless recursion. Testing has shown however that the
object(s) allocated at that point are small, so a dummy static 'heap'
suffices as a workaround.

-- 
Stefan Seefeld
CodeSourcery / Mentor Graphics
http://www.mentor.com/embedded-software/