[gclist] Running out of memory with GC_malloc

Fergus Henderson fjh@cs.mu.oz.au
Sun, 30 Apr 2000 14:21:21 +1000

On 29-Apr-2000, John Palmieri <johnp@martianrock.com> wrote:
> I am having a probelm with the BDW garbage collector.  I had been
> creating massive amounts of C++ objects causing my heap to grow beyond
> its allocated size.   I fixed this by adding the line:
> GC_expand_hp(1024*1024*5);
> This worked until I started to load PNG graphic images using GC_malloc.

For large bitmaps, and other objects containing lots of semi-random
bits but no pointers, you should use GC_malloc_atomic() rather than

(If you have objects that contain lots of semi-random data plus a few
pointers, you could also use GC_malloc_explicitly_typed().)

Fergus Henderson <fjh@cs.mu.oz.au>  |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
PGP: finger fjh@        |     -- the last words of T. S. Garp.