[gclist] Root identity algorithms

[Fergus Henderson]

On 16-Apr-2001, Charles Fiterman <cef@geodesic.com> wrote:
> Instead of keeping a mark bit you keep a pointer to what you marked from.
> At the end you traverse the objects sort and report.

Yes, recent versions of the Boehm (et al) collector have some support for this;
it's enabled by -DKEEP_BACK_PTRS.  See the documentation in Makefile and
include/gc_backptr.h.

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