start2           1772 gc/include/private/gc_priv.h   void GC_unmap_gap(ptr_t start1, word bytes1, ptr_t start2, word bytes2);
start2           1919 gc/os_dep.c    void GC_unmap_gap(ptr_t start1, word bytes1, ptr_t start2, word bytes2)
start2           1923 gc/os_dep.c        ptr_t start2_addr = GC_unmap_start(start2, bytes2);
start2           1924 gc/os_dep.c        ptr_t end2_addr = GC_unmap_end(start2, bytes2);
start2           1928 gc/os_dep.c        GC_ASSERT(start1 + bytes1 == start2);