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| author | Ömer Sinan Ağacan <omeragacan@gmail.com> | 2020-02-18 09:38:27 +0300 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-02-29 05:08:36 -0500 |
| commit | b5fb58fd1a4a24b9273d9d2de65b6347e1654e98 (patch) | |
| tree | eec82775f0414f77d5444cd9e25a2885ba378a6e /includes | |
| parent | a999ee96a22650b59855609f84e2808b4133e9e0 (diff) | |
| download | haskell-b5fb58fd1a4a24b9273d9d2de65b6347e1654e98.tar.gz | |
Document and refactor a few things around bitmap scavenging
- Added a few comments in StgPAP
- Added a few comments and assertions in scavenge_small_bitmap and
walk_large_bitmap
- Did tiny refactor in GHC.Data.Bitmap: added some comments, deleted
dead code, used PlatformWordSize type.
Diffstat (limited to 'includes')
| -rw-r--r-- | includes/rts/storage/Closures.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/includes/rts/storage/Closures.h b/includes/rts/storage/Closures.h index b2b5eda407..81b6fd1fe1 100644 --- a/includes/rts/storage/Closures.h +++ b/includes/rts/storage/Closures.h @@ -104,6 +104,12 @@ typedef struct { StgClosure *selectee; } StgSelector; +/* + PAP payload contains pointers and non-pointers interleaved and we only have + one info table for PAPs (stg_PAP_info). To visit pointers in a PAP payload we + use the `fun`s bitmap. For a PAP with n_args arguments the first n_args bits + in the fun's bitmap tell us which payload locations contain pointers. +*/ typedef struct { StgHeader header; StgHalfWord arity; /* zero if it is an AP */ |