Disable adding main and non moving spaces to immune region in GSS
Disabled adding the main and non moving space to the immune region.
This will enable us to recycle bump pointer spaces for malloc space
-> malloc space compaction as well as collector transitions.
Also added logic for falling back to the non moving space, we may
copy objects there.
Refactored mod union table logic into MarkReachableObjects.
No measurable performance benefit or regression.
Bug: 14059466
Bug: 16291259
Change-Id: If663d9fdbde943b988173b7f6ac844e5f78a0327
diff --git a/runtime/gc/collector/semi_space.h b/runtime/gc/collector/semi_space.h
index bff0847..c5d25f3 100644
--- a/runtime/gc/collector/semi_space.h
+++ b/runtime/gc/collector/semi_space.h
@@ -243,9 +243,14 @@
// large objects were allocated at the last whole heap collection.
uint64_t large_object_bytes_allocated_at_last_whole_heap_collection_;
- // Used for the generational mode. When true, collect the whole
- // heap. When false, collect only the bump pointer spaces.
- bool whole_heap_collection_;
+ // Used for generational mode. When true, we only collect the from_space_.
+ bool collect_from_space_only_;
+
+ // The space which we are promoting into, only used for GSS.
+ space::ContinuousMemMapAllocSpace* promo_dest_space_;
+
+ // The space which we copy to if the to_space_ is full.
+ space::ContinuousMemMapAllocSpace* fallback_space_;
// How many objects and bytes we moved, used so that we don't need to Get the size of the
// to_space_ when calculating how many objects and bytes we freed.