Revert "Revert "Add intrinsic for Reference.get()""
This reverts commit a9b870b73a155ce70c867d5b3f9758fab0b45f07.
Change-Id: Ic2a9b47f2b911bef4b764d10bc33cf000e4b4211
diff --git a/runtime/gc/reference_processor.h b/runtime/gc/reference_processor.h
index 2771ea8..91328a3 100644
--- a/runtime/gc/reference_processor.h
+++ b/runtime/gc/reference_processor.h
@@ -30,6 +30,7 @@
namespace mirror {
class Object;
class Reference;
+class ReferenceClass;
} // namespace mirror
namespace gc {
@@ -49,6 +50,7 @@
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_)
LOCKS_EXCLUDED(lock_);
+ // The slow path bool is contained in the reference class object, can only be set once
// Only allow setting this with mutators suspended so that we can avoid using a lock in the
// GetReferent fast path as an optimization.
void EnableSlowPath() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_);
@@ -60,7 +62,7 @@
IsHeapReferenceMarkedCallback* is_marked_callback, void* arg)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void UpdateRoots(IsMarkedCallback* callback, void* arg)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_);
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_, Locks::heap_bitmap_lock_);
private:
class ProcessReferencesArgs {
@@ -75,8 +77,10 @@
MarkObjectCallback* mark_callback_;
void* arg_;
};
+ bool SlowPathEnabled() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Called by ProcessReferences.
- void DisableSlowPath(Thread* self) EXCLUSIVE_LOCKS_REQUIRED(lock_);
+ void DisableSlowPath(Thread* self) EXCLUSIVE_LOCKS_REQUIRED(lock_)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// If we are preserving references it means that some dead objects may become live, we use start
// and stop preserving to block mutators using GetReferrent from getting access to these
// referents.
@@ -84,8 +88,6 @@
void StopPreservingReferences(Thread* self) LOCKS_EXCLUDED(lock_);
// Process args, used by the GetReferent to return referents which are already marked.
ProcessReferencesArgs process_references_args_ GUARDED_BY(lock_);
- // Boolean for whether or not we need to go slow path in GetReferent.
- volatile bool slow_path_enabled_;
// Boolean for whether or not we are preserving references (either soft references or finalizers).
// If this is true, then we cannot return a referent (see comment in GetReferent).
bool preserving_references_ GUARDED_BY(lock_);