if (space_left >= space_needed) {
size_t old_used = TC_HDR_SIZE + tc->size;
pool_tc->pool = TC_POOL_FIRST_CHUNK(pool_tc);
+#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_UNDEFINED)
+ /*
+ * we need to prepare the memmove into
+ * the unaccessable area.
+ */
+ {
+ size_t diff = PTR_DIFF(tc, pool_tc->pool);
+ size_t flen = MIN(diff, old_used);
+ char *fptr = (char *)pool_tc->pool;
+ VALGRIND_MAKE_MEM_UNDEFINED(fptr, flen);
+ }
+#endif
memmove(pool_tc->pool, tc, old_used);
new_ptr = pool_tc->pool;