Re: memory leak in unload(`gnu')

[Gary V. Vaughan]

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Hallo Eric,

On 3 Oct 2006, at 13:56, Eric Blake wrote:
> I wish I knew a portable
> way to artifically cap the heap usage and cause a memory exhausted  
> error
> in the face of a leak, without making the test take too long to  
> execute.

$ man ulimit
   ulimit [-SHacdflmnpstuv [limit]]
          Provides  control  over the resources available to the  
shell and
          to processes started by it, on systems that allow such   
control.
          The -H and -S options specify that the hard or soft limit  
is set
          for the given resource.  A hard limit cannot be   
increased  once
          it  is set; a soft limit may be increased up to the value  
of the
          hard limit.  If neither -H nor -S is specified,  both   
the  soft
          and  hard limits are set.  The value of limit can be a  
number in
          the unit specified for the resource or one of the special  
values
          hard,  soft,  or  unlimited,  which  stand  for the  
current hard
          limit, the current soft limit, and no limit,   
respectively.   If
          limit  is  omitted,  the  current value of the soft limit  
of the
          resource is printed, unless the -H option is given.    
When  more
          than  one  resource  is  specified,  the limit name and  
unit are
          printed before the value.  Other options are interpreted  
as fol-
          lows:
          -a     All current limits are reported
          -c     The maximum size of core files created
          -d     The maximum size of a process's data segment
          -f     The maximum size of files created by the shell
          -l     The maximum size that may be locked into memory
          -m     The maximum resident set size
          -n     The maximum number of open file descriptors (most  
systems
                 do not allow this value to be set)
          -p     The pipe size in 512-byte blocks (this may not be set)
          -s     The maximum stack size
          -t     The maximum amount of cpu time in seconds
          -u     The maximum number of processes  available  to  a   
single
                 user
         -v     The  maximum  amount  of  virtual memory available  
to the
                 shell

          If limit is given, it is the new value of the specified  
resource
          (the -a option is display only).  If no option is given,  
then -f
          is assumed.  Values are in 1024-byte increments, except  
for  -t,
          which  is  in seconds, -p, which is in units of 512-byte  
blocks,
          and -n and -u, which are unscaled values.  The return  
status  is
          0  unless an invalid option or argument is supplied, or an  
error
          occurs while setting a new limit.

HTH!

Cheers,
        Gary
- --
Gary V. Vaughan      ())_.  address@hidden
Research Scientist   ( '/   http://blog.azazil.net
GNU Hacker           / )=   http://www.gnu.org/software/{libtool,m4}
Technical Author   `(_~)_   http://sources.redhat.com/autobook




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