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Switch mmc to field-logging write barrier

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Instead of the card table, use metadata bytes for field-logging.  More
precision should lead to less work during the pause.
This commit is contained in:
Andy Wingo 2024-10-02 21:25:09 +02:00
parent 1493bf6398
commit 1ecb45a437
6 changed files with 385 additions and 182 deletions
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20
src/root.h
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@ -7,6 +7,7 @@
struct gc_ephemeron;
struct gc_heap;
struct gc_mutator;
struct gc_edge_buffer;
enum gc_root_kind {
GC_ROOT_KIND_NONE,
@ -16,8 +17,7 @@ enum gc_root_kind {
GC_ROOT_KIND_CONSERVATIVE_POSSIBLY_INTERIOR_EDGES,
GC_ROOT_KIND_RESOLVED_EPHEMERONS,
GC_ROOT_KIND_EDGE,
GC_ROOT_KIND_REMEMBERED_OBJECT,
GC_ROOT_KIND_REMEMBERED_SLAB,
GC_ROOT_KIND_EDGE_BUFFER,
};
struct gc_root {
@ -28,8 +28,7 @@ struct gc_root {
struct gc_ephemeron *resolved_ephemerons;
struct extent_range range;
struct gc_edge edge;
struct gc_ref ref;
size_t idx;
struct gc_edge_buffer *edge_buffer;
};
};
@ -73,16 +72,9 @@ gc_root_edge(struct gc_edge edge) {
}
static inline struct gc_root
gc_root_remembered_object(struct gc_ref ref) {
struct gc_root ret = { GC_ROOT_KIND_REMEMBERED_OBJECT };
ret.ref = ref;
return ret;
}
static inline struct gc_root
gc_root_remembered_slab(size_t idx) {
struct gc_root ret = { GC_ROOT_KIND_REMEMBERED_SLAB };
ret.idx = idx;
gc_root_edge_buffer(struct gc_edge_buffer *buf) {
struct gc_root ret = { GC_ROOT_KIND_EDGE_BUFFER };
ret.edge_buffer = buf;
return ret;
}