ART: Clean up art_method.h

Clean up the header. Fix up other headers including the -inl file,
in an effort to prune the include graph. Fix broken transitive
includes by making includes explicit. Introduce new -inl files
for method handles and reference visiting.

Test: source build/envsetup.sh && lunch aosp_angler-userdebug && mmma art
Test: source build/envsetup.sh && lunch aosp_mips64-userdebug && mmma art
Change-Id: I8f60f1160c2a702fdf3598149dae38f6fa6bc851
diff --git a/runtime/mirror/class-refvisitor-inl.h b/runtime/mirror/class-refvisitor-inl.h
new file mode 100644
index 0000000..ffc4af5
--- /dev/null
+++ b/runtime/mirror/class-refvisitor-inl.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_
+#define ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_
+
+#include "class-inl.h"
+
+#include "class_ext-inl.h"
+
+namespace art {
+namespace mirror {
+
+template <bool kVisitNativeRoots,
+          VerifyObjectFlags kVerifyFlags,
+          ReadBarrierOption kReadBarrierOption,
+          typename Visitor>
+inline void Class::VisitReferences(ObjPtr<Class> klass, const Visitor& visitor) {
+  VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass.Ptr(), visitor);
+  // Right after a class is allocated, but not yet loaded
+  // (kStatusNotReady, see ClassLinker::LoadClass()), GC may find it
+  // and scan it. IsTemp() may call Class::GetAccessFlags() but may
+  // fail in the DCHECK in Class::GetAccessFlags() because the class
+  // status is kStatusNotReady. To avoid it, rely on IsResolved()
+  // only. This is fine because a temp class never goes into the
+  // kStatusResolved state.
+  if (IsResolved<kVerifyFlags>()) {
+    // Temp classes don't ever populate imt/vtable or static fields and they are not even
+    // allocated with the right size for those. Also, unresolved classes don't have fields
+    // linked yet.
+    VisitStaticFieldsReferences<kVerifyFlags, kReadBarrierOption>(this, visitor);
+  }
+  if (kVisitNativeRoots) {
+    // Since this class is reachable, we must also visit the associated roots when we scan it.
+    VisitNativeRoots<kReadBarrierOption>(
+        visitor, Runtime::Current()->GetClassLinker()->GetImagePointerSize());
+  }
+}
+
+template<ReadBarrierOption kReadBarrierOption, class Visitor>
+void Class::VisitNativeRoots(Visitor& visitor, PointerSize pointer_size) {
+  for (ArtField& field : GetSFieldsUnchecked()) {
+    // Visit roots first in case the declaring class gets moved.
+    field.VisitRoots(visitor);
+    if (kIsDebugBuild && IsResolved()) {
+      CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus();
+    }
+  }
+  for (ArtField& field : GetIFieldsUnchecked()) {
+    // Visit roots first in case the declaring class gets moved.
+    field.VisitRoots(visitor);
+    if (kIsDebugBuild && IsResolved()) {
+      CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus();
+    }
+  }
+  for (ArtMethod& method : GetMethods(pointer_size)) {
+    method.VisitRoots<kReadBarrierOption>(visitor, pointer_size);
+  }
+  ObjPtr<ClassExt> ext(GetExtData<kDefaultVerifyFlags, kReadBarrierOption>());
+  if (!ext.IsNull()) {
+    ext->VisitNativeRoots<kReadBarrierOption, Visitor>(visitor, pointer_size);
+  }
+}
+
+}  // namespace mirror
+}  // namespace art
+
+#endif  // ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_