Move mirror::ArtMethod to native

Optimizing + quick tests are passing, devices boot.

TODO: Test and fix bugs in mips64.

Saves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.
Some of the savings are from removal of virtual methods and direct
methods object arrays.

Bug: 19264997
Change-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d

1 files changed, 20 insertions, 0 deletions

diff --git a/runtime/mirror/array.cc b/runtime/mirror/array.cc
index b92f01797a..d72c03ff86 100644
--- a/runtime/mirror/array.cc
+++ b/runtime/mirror/array.cc
@@ -125,6 +125,26 @@ void Array::ThrowArrayStoreException(Object* object) {
   art::ThrowArrayStoreException(object->GetClass(), this->GetClass());
 }
 
+Array* Array::CopyOf(Thread* self, int32_t new_length) {
+  CHECK(GetClass()->GetComponentType()->IsPrimitive()) << "Will miss write barriers";
+  DCHECK_GE(new_length, 0);
+  // We may get copied by a compacting GC.
+  StackHandleScope<1> hs(self);
+  auto h_this(hs.NewHandle(this));
+  auto* heap = Runtime::Current()->GetHeap();
+  gc::AllocatorType allocator_type = heap->IsMovableObject(this) ? heap->GetCurrentAllocator() :
+      heap->GetCurrentNonMovingAllocator();
+  const auto component_size = GetClass()->GetComponentSize();
+  const auto component_shift = GetClass()->GetComponentSizeShift();
+  Array* new_array = Alloc<true>(self, GetClass(), new_length, component_shift, allocator_type);
+  if (LIKELY(new_array != nullptr)) {
+    memcpy(new_array->GetRawData(component_size, 0), h_this->GetRawData(component_size, 0),
+           std::min(h_this->GetLength(), new_length) << component_shift);
+  }
+  return new_array;
+}
+
+
 template <typename T> GcRoot<Class> PrimitiveArray<T>::array_class_;
 
 // Explicitly instantiate all the primitive array types.