1178 #define top            (bin_at(0)->fd)   /* The topmost chunk */  macro
1383   if (p != top)  in do_check_chunk()
1384     assert((char*)p + sz <= (char*)top);  in do_check_chunk()
1410     assert (next == top || inuse(next));  in do_check_free_chunk()
1438   if (next == top)  in do_check_inuse_chunk()
1712   mchunkptr old_top     = top;  /* Record state of old top */  in malloc_extend_top()
1742     set_head(top, top_size | PREV_INUSE);  in malloc_extend_top()
1780     top = (mchunkptr)brk;  in malloc_extend_top()
1782     set_head(top, top_size | PREV_INUSE);  in malloc_extend_top()
1793         set_head(top, PREV_INUSE); /* will force null return from malloc */  in malloc_extend_top()
1821   assert(((unsigned long)((char*)top + top_size) & (pagesz - 1)) == 0  in malloc_extend_top()
2125   remainder_size = long_sub_size_t(chunksize(top), nb);  in mALLOc()
2126   if (chunksize(top) < nb || remainder_size < (long)MINSIZE)  in mALLOc()
2141     remainder_size = long_sub_size_t(chunksize(top), nb);  in mALLOc()
2142     if (chunksize(top) < nb || remainder_size < (long)MINSIZE)  in mALLOc()
2149   victim = top;  in mALLOc()
2151   top = chunk_at_offset(victim, nb);  in mALLOc()
2152   set_head(top, remainder_size | PREV_INUSE);  in mALLOc()
2228   if (next == top)                            /* merge with top */  in fREe()
2241     top = p;  in fREe()
2426     if (next == top || !inuse(next))  in rEALLOc()
2431       if (next == top)  in rEALLOc()
2436           top = chunk_at_offset(oldp, nb);  in rEALLOc()
2437           set_head(top, (newsize - nb) | PREV_INUSE);  in rEALLOc()
2470         if (next == top)  in rEALLOc()
2479             top = chunk_at_offset(newp, nb);  in rEALLOc()
2480             set_head(top, (newsize - nb) | PREV_INUSE);  in rEALLOc()
2765   oldtop = top;  in cALLOc()
2766   oldtopsize = chunksize(top);  in cALLOc()
2869   top_size = chunksize(top);  in malloc_trim()
2882     if (current_brk != (char*)(top) + top_size)  in malloc_trim()
2896         top_size = current_brk - (char*)top;  in malloc_trim()
2900           set_head(top, top_size | PREV_INUSE);  in malloc_trim()
2902         check_chunk(top);  in malloc_trim()
2910         set_head(top, (top_size - extra) | PREV_INUSE);  in malloc_trim()
2912         check_chunk(top);  in malloc_trim()
2975   INTERNAL_SIZE_T avail = chunksize(top);  in malloc_update_mallinfo()
2986            q < top && inuse(q) && (long)(chunksize(q)) >= (long)MINSIZE;  in malloc_update_mallinfo()
3002   current_mallinfo.keepcost = chunksize(top);  in malloc_update_mallinfo()