14   struct mallinfo mi;  in check()  local
17   mi = mallinfo();  in check()
21     printf("arena = %d\n", mi.arena);	    /* non-mmapped space allocated from system */  in check()
22     printf("ordblks = %d\n", mi.ordblks);   /* number of free chunks */  in check()
23     printf("smblks = %d\n", mi.smblks);	    /* number of fastbin blocks */  in check()
24     printf("hblks = %d\n", mi.hblks);	    /* number of mmapped regions */  in check()
25     printf("hblkhd = %d\n", mi.hblkhd);	    /* space in mmapped regions */  in check()
26     printf("usmblks = %d\n", mi.usmblks);   /* maximum total allocated space */  in check()
27     printf("fsmblks = %d\n", mi.fsmblks);   /* space available in freed fastbin blocks */  in check()
28     printf("uordblks = %d\n", mi.uordblks); /* total allocated space */  in check()
29     printf("fordblks = %d\n", mi.fordblks); /* total free space */  in check()
30     printf("keepcost = %d\n", mi.keepcost); /* top-most, releasable (via malloc_trim) space */  in check()
36   used = mi.uordblks + mi.hblkhd;  in check()
49   if ((mi.ordblks == 0) != (mi.fordblks == 0))  in check()
52   if ((mi.smblks == 0) != (mi.fsmblks == 0))  in check()
55   if ((mi.hblks == 0) != (mi.hblkhd == 0))  in check()
58   if (mi.keepcost > mi.fordblks)  in check()
61   if (mi.fsmblks > mi.fordblks)  in check()
65   if (mi.arena < mi.fordblks + mi.uordblks)  in check()
68   if (mi.arena/5*4 > mi.fordblks + mi.uordblks)  in check()