heap memory usage in L4 drops/oskit task

[Bert van Leeuwen]

Curious...
I just got this now instead of the exception:
 lmm_dump(lmm=0x017e0390)
  region 01000000-fffffff8 size=fefffff8 flags=00000000 pri=0 free=052bcb40
   node 0x0ad31400-0ad31408 size=00000008 next=0x0ad31790
   node 0x0ad31790-0ad317a0 size=00000010 next=0x0ad31810
   node 0x0ad31810-0ad31818 size=00000008 next=0x0ad31da0
   node 0x0ad31da0-0ad31db0 size=00000010 next=0x0ad31e20
   node 0x0ad31e20-0ad31e28 size=00000008 next=0x0ad33bf8
   node 0x0ad33bf8-0ad33c08 size=00000010 next=0x0ad34010
   node 0x0ad34010-0ad34018 size=00000008 next=0x0ad34c40
   node 0x0ad34c40-0ad34c48 size=00000008 next=0x0ad35e38
   node 0x0ad35e38-0ad35e48 size=00000010 next=0x0ad3a050
   node 0x0ad3a050-0ad3a058 size=00000008 next=0x0ad3a6c8
   node 0x0ad3a6c8-0ad3b078 size=000009b0 next=0x0ad3c080
   node 0x0ad3c080-0ad3f090 size=00003010 next=0x0ad470f8
   node 0x0ad470f8-10000000 size=052b8f08 next=0x00000000
  free_check=052bc938
 lmm_dump.c:63: failed assertion `reg->free == free_check'
 PANIC. Backtrace: fp=5bffe8c
  01725037 0160185c 01643260 0169fea7 01700110L4RM: [PF] read at
0x05c00000, eip 016f7f5a, src 1B.1B
 [1B.0] l4rm/lib/src/pagefault.c:78:__unknown_pf():
  unhandled page fault



Could this perhaps indicate a double-free of a pointer somewhere or the like??

On 7/26/05, Bert van Leeuwen <bert.vanleeuwen at gmail.com> wrote:
> Thanks, that seems to give a likely sounding figure. Just to be sure,
> all new/delete/malloc/free in my program will contribute to that
> figure, right? I'm getting what I thought was a mem leak, since after
> a time calling new throws an exception, but it still seems to happen
> and the mem figure doesn't indicate a mem leak taking place... Is
> there any other reason that new would throw an exception? Perhaps heap
> fragmentation or something like that?
> 
> On 7/26/05, Christian Helmuth <ch12 at os.inf.tu-dresden.de> wrote:
> > Hi,
> >
> > On Tue, Jul 26, 2005 at 11:11:03AM +0200, Bert van Leeuwen wrote:
> > > How can I check how much heap space is left (or used) in my
> > > drops/oskit program? Normally (in linux/gnu) I would use getrusage,
> > > which also returns a number of other useful statistics, but this
> > > function doesn't seem to exist in drops/oskit...
> >
> > In "MODE = l4env" you could use one of:
> >
> >   #include <oskit/lmm.h>
> >
> >   extern lmm_t malloc_lmm;
> >
> >   unsigned int free_memory = lmm_avail(&malloc_lmm, 0);
> >   lmm_dump(&malloc_lmm);
> >   lmm_stats(&malloc_lmm);
> >
> >
> > --
> > Christian Helmuth
> >
> > TU Dresden, Dept. of CS
> > Operating Systems Group
> > http://os.inf.tu-dresden.de/~ch12
> >
> > _______________________________________________
> > l4-hackers mailing list
> > l4-hackers at os.inf.tu-dresden.de
> > http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
> >
> 
> 
> --
> BvL
> 


-- 
BvL