Re: How a can get the process heap size?

[Ed L Cashin <ecashin@uga.edu>]

<Allan.Bezerra@indt.org.br> writes:

> Hi,
>
> How a can get the heap size from a specific process?
>
> I saw that /proc file system don't provide this.

What about the maps file?  I have a test program that cats its maps
file, allocates 20 pages, writes to the first and last page, and then
cats the maps file again.  The output is shown below, where you can
see a new VMA 20 pages in size in the "after" case:

  ecashin@marblerye tmp$ ./a.out 
  before
  08048000-08049000 r-xp 00000000 03:03 166489     /tmp/a.out
  08049000-0804a000 rw-p 00000000 03:03 166489     /tmp/a.out
  40000000-40013000 r-xp 00000000 03:03 196431     /lib/ld-2.2.5.so
  40013000-40014000 rw-p 00013000 03:03 196431     /lib/ld-2.2.5.so
  40014000-40015000 rw-p 00000000 00:00 0
  4001c000-4012f000 r-xp 00000000 03:03 196434     /lib/libc-2.2.5.so
  4012f000-40135000 rw-p 00113000 03:03 196434     /lib/libc-2.2.5.so
  40135000-40139000 rw-p 00000000 00:00 0
  bfffe000-c0000000 rwxp fffff000 00:00 0
  after
  08048000-08049000 r-xp 00000000 03:03 166489     /tmp/a.out
  08049000-0804a000 rw-p 00000000 03:03 166489     /tmp/a.out
  0804a000-0805e000 rwxp 00000000 00:00 0
  40000000-40013000 r-xp 00000000 03:03 196431     /lib/ld-2.2.5.so
  40013000-40014000 rw-p 00013000 03:03 196431     /lib/ld-2.2.5.so
  40014000-40015000 rw-p 00000000 00:00 0
  4001c000-4012f000 r-xp 00000000 03:03 196434     /lib/libc-2.2.5.so
  4012f000-40135000 rw-p 00113000 03:03 196434     /lib/libc-2.2.5.so
  40135000-40139000 rw-p 00000000 00:00 0
  bfffe000-c0000000 rwxp fffff000 00:00 0
  ecashin@marblerye tmp$ 


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--Ed L Cashin            |   PGP public key:
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