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README 1995-05-04 02:00 2.6K
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boecha.ps.Z 1994-06-13 02:00 60K
complexity.html 1995-10-05 01:00 7.5K
example.html 1996-01-09 01:00 3.6K
gc.html 1996-04-15 02:00 8.5K
gc.tar.Z 1996-03-06 01:00 390K
gc.tar.gz 1996-03-06 01:00 268K
gc1.9.tar.Z 1994-05-20 02:00 53K
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gc4.0.tar.Z 1994-04-07 02:00 239K
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gc4.2.tar.Z 1994-08-02 02:00 329K
gc4.3.tar.Z 1994-12-23 01:00 309K
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papers/ 2019-02-16 00:23 -
sched.tar.Z 1994-08-06 02:00 40K
This directory contains various versions of the Boehm-Demers-Weiser
conservative garbage collector. The collector can be used as a garbage
collecting replacement for C malloc or C++ New. It is also used by a
number of programming language implementations that use C as intermediate
code. It may also be used as a leak detector for C or C++ programs, though
that is not its primary goal.
The file gc.tar.Z is a copy of the version currently considered most stable.
This may not be the latest version. The latest version will
often support additional target platforms or features. Usually you should
first try to use gc.tar.Z. If that fails, try gcX.Y.tar.Z for the largest
possible value of X.Y. The older versions exist primarily for historical
reasons, and can be safely ignored unless you uncover a recently introduced
bug.
See the README file in the distribution for more details.
The file sched.tar.Z contains a rather primitive and not well-tested
SPARC instruction scheduler that operates on assembly files. It is in this
directory primarily because I didn't want to set up another ftp directory.
(It does implement a GC-safe option.)
The file papers/pldi91.ps.Z contains the following ACM copyrighted paper
describing the concurrent collection strategy used by the PCR garbage collector:
Boehm, H., A. Demers, and S. Shenker, "Mostly Parallel Garbage Collection",
Proceedings of the ACM SIGPLAN '91 Conference on Programming Language Design
and Implementation, SIGPLAN Notices 26, 6 (June 1991), pp. 157-164.
The collector in this directory no longer relies on multiple threads.
But the incremental algorithm it uses is essentially the same algorithm.
The file papers/pldi93.ps.Z contains the following ACM copyrighted
paper describing the strategy used by the collector to minimize
accidental memory retention:
Boehm, H., "Space Efficient Conservative Garbage Collection", Proceedings
of the ACM SIGPLAN '91 Conference on Programming Language Design and
Implementation, SIGPLAN Notices 28, 6 (June 1993), pp. 197-206.
The file papers/boecha.ps.Z contains a reprint of the paper "A Proposal for
Garbage-Collector-Safe C Compilation", by Boehm and Chase. It originally
appeared in the December 1992 issue of the Journal of C Language Translation.
We thank John Levine and JCLT for allowing us to make the paper
available electronically, and providing PostScript for the final version.
(In retrospect, this paper did not pay enough attention to the case
in which all interior pointers are considered valid. Some of the
stated assumptions are unnecessarily restricitive, and simpler techniques
suffice.)
Hans-J. Boehm
([email protected])