+int mmalloc_compare_heap(xbt_mheap_t heap1, xbt_mheap_t heap2, xbt_dynar_t *stacks1, xbt_dynar_t *stacks2, xbt_dynar_t *equals);
+int mmalloc_linear_compare_heap(xbt_mheap_t heap1, xbt_mheap_t heap2);
+
+void mmalloc_backtrace_block_display(void* heapinfo, int block);
+void mmalloc_backtrace_fragment_display(void* heapinfo, int block, int frag);
+void mmalloc_backtrace_display(void *addr);
+
+int is_free_area(void *area, xbt_mheap_t heap);
+