[Gllug] mallinfo

[t.clarke]

Help !!
Bit of expert C advice required  please

I need to be able to keep track of total memory allocated by malloc within a
particular program,  but is doesn't work :-(

The following 'test' program works on a Unix system correctly,
but on a LInux system (debian), it reports the final 'alloc' line
(after calling mallinfo) as ZERO  !!

I cannot for the life of me see what is wrong.

Any suggestions (or do I have a buggy glib ?)

Tim

----





#include <unistd.h>
#include <stdio.h>
#include <malloc.h>
#include <errno.h>
main(argc, argv)
/*copy input file to output file omitting carriage-returns*/
int argc;
char *argv[];
{
unsigned long int b;
char *old_brk, *new_brk, *mema, *memb, *memc;
struct mallinfo mallinf;
mema=malloc(3200000);
printf("mema %ld\n",mema);
memb=malloc(3200000);
printf("memb %ld\n",memb);
memc=malloc(3200000);
printf("memc %ld\n",memc);
b=mema-memc;
printf("alloc %ld\n",b);
mallinf=mallinfo();
printf("alloc %ld\n",mallinf.arena);
}

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