Revert "Revert "Revert "Revert "Add intrinsic for Reference.get()""""

Fixed TargetReg issue causing build failure for x86.
This reverts commit 9e82bd3f0ce9e5f5777bea2f752ff3e251d32f9f.

Change-Id: I7e6a526954467aaf68deeed999880dfe9aa5f06e

1 files changed, 9 insertions, 8 deletions

diff --git a/runtime/gc/reference_processor.cc b/runtime/gc/reference_processor.cc
index e52bc1fd1e..d3641d196f 100644
--- a/runtime/gc/reference_processor.cc
+++ b/runtime/gc/reference_processor.cc
@@ -17,7 +17,9 @@
 #include "reference_processor.h"
 
 #include "mirror/object-inl.h"
+#include "mirror/reference.h"
 #include "mirror/reference-inl.h"
+#include "reference_processor-inl.h"
 #include "reflection.h"
 #include "ScopedLocalRef.h"
 #include "scoped_thread_state_change.h"
@@ -27,18 +29,17 @@ namespace art {
 namespace gc {
 
 ReferenceProcessor::ReferenceProcessor()
-    : process_references_args_(nullptr, nullptr, nullptr), slow_path_enabled_(false),
+    : process_references_args_(nullptr, nullptr, nullptr),
       preserving_references_(false), lock_("reference processor lock", kReferenceProcessorLock),
       condition_("reference processor condition", lock_) {
 }
 
 void ReferenceProcessor::EnableSlowPath() {
-  Locks::mutator_lock_->AssertExclusiveHeld(Thread::Current());
-  slow_path_enabled_ = true;
+  mirror::Reference::GetJavaLangRefReference()->SetSlowPath(true);
 }
 
 void ReferenceProcessor::DisableSlowPath(Thread* self) {
-  slow_path_enabled_ = false;
+  mirror::Reference::GetJavaLangRefReference()->SetSlowPath(false);
   condition_.Broadcast(self);
 }
 
@@ -46,11 +47,11 @@ mirror::Object* ReferenceProcessor::GetReferent(Thread* self, mirror::Reference*
   mirror::Object* const referent = reference->GetReferent();
   // If the referent is null then it is already cleared, we can just return null since there is no
   // scenario where it becomes non-null during the reference processing phase.
-  if (LIKELY(!slow_path_enabled_) || referent == nullptr) {
+  if (UNLIKELY(!SlowPathEnabled()) || referent == nullptr) {
     return referent;
   }
   MutexLock mu(self, lock_);
-  while (slow_path_enabled_) {
+  while (SlowPathEnabled()) {
     mirror::HeapReference<mirror::Object>* const referent_addr =
         reference->GetReferentReferenceAddr();
     // If the referent became cleared, return it. Don't need barrier since thread roots can't get
@@ -117,7 +118,7 @@ void ReferenceProcessor::ProcessReferences(bool concurrent, TimingLogger* timing
     process_references_args_.is_marked_callback_ = is_marked_callback;
     process_references_args_.mark_callback_ = mark_object_callback;
     process_references_args_.arg_ = arg;
-    CHECK_EQ(slow_path_enabled_, concurrent) << "Slow path must be enabled iff concurrent";
+    CHECK_EQ(SlowPathEnabled(), concurrent) << "Slow path must be enabled iff concurrent";
   }
   // Unless required to clear soft references with white references, preserve some white referents.
   if (!clear_soft_references) {
@@ -182,7 +183,7 @@ void ReferenceProcessor::DelayReferenceReferent(mirror::Class* klass, mirror::Re
                                                 void* arg) {
   // klass can be the class of the old object if the visitor already updated the class of ref.
   DCHECK(klass != nullptr);
-  DCHECK(klass->IsReferenceClass());
+  DCHECK(klass->IsTypeOfReferenceClass());
   mirror::HeapReference<mirror::Object>* referent = ref->GetReferentReferenceAddr();
   if (referent->AsMirrorPtr() != nullptr && !is_marked_callback(referent, arg)) {
     Thread* self = Thread::Current();