Function mi_malloc_size_checked

3rd/mimalloc-2.0.9/src/alloc-override.c:60–63

  #define MI_OSX_IS_INTERPOSED

  mi_decl_externc static size_t mi_malloc_size_checked(void *p) {
    if (!mi_is_in_heap_region(p)) return 0;
    return mi_usable_size(p);
  }

  // use interposing so `DYLD_INSERT_LIBRARIES` works without `DYLD_FORCE_FLAT_NAMESPACE=1`
  // See: <https://books.google.com/books?id=K8vUkpOXhN4C&pg=PA73>