[gclist] Experience with Boehm-Demers-Weiser on Alpha in 32 bit mode?
Thu, 8 Oct 1998 21:28:29 -0400 (EDT)
I would like to use conservative garbage collection for the runtime
system of a compiler that produces code in 32 bit mode on the
DEC/COMPAC/INTEL Alpha: our tests of the compiler have gotten to
large enough programs to require garbage collection.
I assumed that the latest (non-alpha-point) release of
Boehm-Demers-Weiser ( gc4.12.tar.gz 07-Aug-98 17:23 ) would work out
of the box, but this isn't the case: after making what seemed the
reasonable tweaks for word size 32 and 4 byte alignment to the
parameters for compiling gc4 on the Alpha, we ended up with a garbage
collector that crashed during initialization. (64 bit mode tested out
fine but can't be used with our code generator).
Our pointers use the low 2 bits for tag info, but that shouldn't be an
issue. Our calling conventions follow the standard Alpha convention
so stack traces shouldn't have any difficulty.
I took a look at the FAQ for this group and the group seems more
oriented towards GC work and development than towards product
maintenance, _but_ if you have experience porting the BDW collector to
32 bit mode on the Alpha, I would appreciate your assistance.
Alternatively if there is another free conservative GC out there that
I should consider for 32 bit mode on the Alpha, I would be interested
in hearing about it.
Thank you for your help.
-- Allyn Dimock
Allyn Dimock email@example.com Eng. Sci. Lab #227
348 Harvard St. #1 h (617) 661-9299 40 Oxford St.
Cambridge, Ma. 02138 w (617) 495-3998 Cambridge, Ma. 02138