Re: Glob problem with memory

[jarausch@xxxxxxxxxxxxxxxxxxx]

On  1 Jan, Peter Stephenson wrote:
> Felix Rosencrantz wrote:
>> When attempting to do an "echo *(/)" or use other glob qualifiers,
>> I've been getting a bus error with this stack trace on Solaris 5.6.
>> I started seeing this problem in builds sometime after Dec 14th.
>> I think it is related to the recently made memory changes.
>> I don't see the problem if I replace the hcalloc on line glob.c:1312
>> with a zcalloc, so the problem seems to be related to memory allocation.
> 
> We should check that the new mmap() memory things in mem.c always return
> 64-bit aligned pointers where necessary, even on 32-bit machines.  I was
> getting just this sort of problem with the old form of the zhalloc()
> mechanism when I introduced 64-bit integer support and before I fixed the
> alignment.  I'll have a look at this, but Sven might be able to trace it
> more effectively when he gets back.  Meanwhile, changing the USE_MMAP
> #define in mem.c to #undef USE_MMAP should fix things up for the time
> being.
> 
Here on my IRIX box (it's 64 bit but I am using -n32 i.e. 32 bit code)
I get the same bus error,
BUT mem.c does NOT use mmap here, since my <sys/mman.h> doesn't define
MAP_ANONYMOUS

So what can we do?
Helmut.

-- 
Helmut Jarausch
Lehrstuhl fuer Numerische Mathematik
Institute of Technology, RWTH Aachen
D 52056 Aachen, Germany