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Rework pinning, prepare for conservative tracing

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We don't need a pin bit: we just need to mark pinned objects before
evacuation starts.  This way we can remove the stopping / marking race
so that we can always mark while stopping.
This commit is contained in:
Andy Wingo 2022-08-22 21:11:30 +02:00
parent 2199d5f48d
commit 8a51117763
4 changed files with 200 additions and 89 deletions
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21
gc-embedder-api.h
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@ -12,19 +12,30 @@ struct gc_mutator_roots;
struct gc_heap_roots;
struct gc_atomic_forward;
GC_EMBEDDER_API inline int gc_has_conservative_roots(void);
GC_EMBEDDER_API inline int gc_has_conservative_intraheap_edges(void);
GC_EMBEDDER_API inline void gc_trace_object(struct gc_ref ref,
void (*trace_edge)(struct gc_edge edge,
void *trace_data),
void *trace_data,
size_t *size) GC_ALWAYS_INLINE;
GC_EMBEDDER_API inline void gc_trace_mutator_roots(struct gc_mutator_roots *roots,
GC_EMBEDDER_API inline void gc_trace_conservative_mutator_roots(struct gc_mutator_roots *roots,
void (*trace_ref)(struct gc_ref edge,
void *trace_data),
void *trace_data);
GC_EMBEDDER_API inline void gc_trace_precise_mutator_roots(struct gc_mutator_roots *roots,
void (*trace_edge)(struct gc_edge edge,
void *trace_data),
void *trace_data);
GC_EMBEDDER_API inline void gc_trace_heap_roots(struct gc_heap_roots *roots,
void (*trace_edge)(struct gc_edge edge,
void *trace_data),
void *trace_data);
GC_EMBEDDER_API inline void gc_trace_precise_heap_roots(struct gc_heap_roots *roots,
void (*trace_edge)(struct gc_edge edge,
void *trace_data),
void *trace_data);
GC_EMBEDDER_API inline void gc_trace_conservative_heap_roots(struct gc_heap_roots *roots,
void (*trace_ref)(struct gc_ref ref,
void *trace_data),
void *trace_data);
GC_EMBEDDER_API inline uintptr_t gc_object_forwarded_nonatomic(struct gc_ref ref);
GC_EMBEDDER_API inline void gc_object_forward_nonatomic(struct gc_ref ref,