| This patch removes support, on Linux, for using the malloc_usable_size |
| introspection method when instantiating CoreFoundation runtime |
| instances. |
| |
| On Linux, across various architectures and versions of the GNU C |
| Library, malloc_usable_size has been observed to at times return |
| incorrect values. Since the introspection value-add it provides to |
| CoreFoundation seems to be of limited utility in this context, we |
| eliminate it and simpy use the caller-requested size. In addition, |
| memsetting this small tail block has also been found to cause heap |
| consistency problems. |
