mallinfo can't handle >2g values

[Matt Liberty]

Hi,

 

The glibc mallinfo has a problem in that it uses int values as fields to return the amount of memory used.  This seems like a bug because allocations can go over 2G on linux.  On solaris mallinfo uses unsigned long for the fields.

 

I looked at the latest malloc.h (http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/malloc/malloc.h?rev=1.23&content-type=text/x-cvsweb-markup&cvsroot=glibc) and the problem still seems to be there.

 

Attached is a test program that demonstrates the problem.  If we use the procfs data we see more memory in use than mallinfo reports.  Please let me know if you agree.

 

Thanks,

 

-Matt

 

ps:  I don’t follow your mailing lists so please reply to me directly.

memusage.cxx
Description: memusage.cxx