ART: Move DexCache arrays to native.
This CL has a companion CL in libcore/
https://android-review.googlesource.com/162985
Change-Id: Icbc9e20ad1b565e603195b12714762bb446515fa
diff --git a/runtime/utils/dex_cache_arrays_layout-inl.h b/runtime/utils/dex_cache_arrays_layout-inl.h
new file mode 100644
index 0000000..4f662d5
--- /dev/null
+++ b/runtime/utils/dex_cache_arrays_layout-inl.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2015 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_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
+#define ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
+
+#include "dex_cache_arrays_layout.h"
+
+#include "base/bit_utils.h"
+#include "base/logging.h"
+#include "gc_root.h"
+#include "globals.h"
+#include "primitive.h"
+
+namespace art {
+
+inline DexCacheArraysLayout::DexCacheArraysLayout(size_t pointer_size, const DexFile* dex_file)
+ : pointer_size_(pointer_size),
+ /* types_offset_ is always 0u, so it's constexpr */
+ methods_offset_(types_offset_ +
+ RoundUp(TypesSize(dex_file->NumTypeIds()), MethodsAlignment())),
+ strings_offset_(methods_offset_ +
+ RoundUp(MethodsSize(dex_file->NumMethodIds()), StringsAlignment())),
+ fields_offset_(strings_offset_ +
+ RoundUp(StringsSize(dex_file->NumStringIds()), FieldsAlignment())),
+ size_(fields_offset_ +
+ RoundUp(FieldsSize(dex_file->NumFieldIds()), Alignment())) {
+ DCHECK(ValidPointerSize(pointer_size)) << pointer_size;
+}
+
+inline size_t DexCacheArraysLayout::Alignment() const {
+ // GcRoot<> alignment is 4, i.e. lower than or equal to the pointer alignment.
+ static_assert(alignof(GcRoot<mirror::Class>) == 4, "Expecting alignof(GcRoot<>) == 4");
+ static_assert(alignof(GcRoot<mirror::String>) == 4, "Expecting alignof(GcRoot<>) == 4");
+ DCHECK(pointer_size_ == 4u || pointer_size_ == 8u);
+ // Pointer alignment is the same as pointer size.
+ return pointer_size_;
+}
+
+inline size_t DexCacheArraysLayout::TypeOffset(uint32_t type_idx) const {
+ return types_offset_ + ElementOffset(sizeof(GcRoot<mirror::Class>), type_idx);
+}
+
+inline size_t DexCacheArraysLayout::TypesSize(size_t num_elements) const {
+ return ArraySize(sizeof(GcRoot<mirror::Class>), num_elements);
+}
+
+inline size_t DexCacheArraysLayout::TypesAlignment() const {
+ return alignof(GcRoot<mirror::Class>);
+}
+
+inline size_t DexCacheArraysLayout::MethodOffset(uint32_t method_idx) const {
+ return methods_offset_ + ElementOffset(pointer_size_, method_idx);
+}
+
+inline size_t DexCacheArraysLayout::MethodsSize(size_t num_elements) const {
+ return ArraySize(pointer_size_, num_elements);
+}
+
+inline size_t DexCacheArraysLayout::MethodsAlignment() const {
+ return pointer_size_;
+}
+
+inline size_t DexCacheArraysLayout::StringOffset(uint32_t string_idx) const {
+ return strings_offset_ + ElementOffset(sizeof(GcRoot<mirror::String>), string_idx);
+}
+
+inline size_t DexCacheArraysLayout::StringsSize(size_t num_elements) const {
+ return ArraySize(sizeof(GcRoot<mirror::String>), num_elements);
+}
+
+inline size_t DexCacheArraysLayout::StringsAlignment() const {
+ return alignof(GcRoot<mirror::String>);
+}
+
+inline size_t DexCacheArraysLayout::FieldOffset(uint32_t field_idx) const {
+ return fields_offset_ + ElementOffset(pointer_size_, field_idx);
+}
+
+inline size_t DexCacheArraysLayout::FieldsSize(size_t num_elements) const {
+ return ArraySize(pointer_size_, num_elements);
+}
+
+inline size_t DexCacheArraysLayout::FieldsAlignment() const {
+ return pointer_size_;
+}
+
+inline size_t DexCacheArraysLayout::ElementOffset(size_t element_size, uint32_t idx) {
+ return element_size * idx;
+}
+
+inline size_t DexCacheArraysLayout::ArraySize(size_t element_size, uint32_t num_elements) {
+ return element_size * num_elements;
+}
+
+} // namespace art
+
+#endif // ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_INL_H_
diff --git a/runtime/utils/dex_cache_arrays_layout.h b/runtime/utils/dex_cache_arrays_layout.h
new file mode 100644
index 0000000..d50be5a
--- /dev/null
+++ b/runtime/utils/dex_cache_arrays_layout.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2015 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_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
+#define ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
+
+namespace art {
+
+/**
+ * @class DexCacheArraysLayout
+ * @details This class provides the layout information for the type, method, field and
+ * string arrays for a DexCache with a fixed arrays' layout (such as in the boot image),
+ */
+class DexCacheArraysLayout {
+ public:
+ // Construct an invalid layout.
+ DexCacheArraysLayout()
+ : /* types_offset_ is always 0u */
+ pointer_size_(0u),
+ methods_offset_(0u),
+ strings_offset_(0u),
+ fields_offset_(0u),
+ size_(0u) {
+ }
+
+ // Construct a layout for a particular dex file.
+ DexCacheArraysLayout(size_t pointer_size, const DexFile* dex_file);
+
+ bool Valid() const {
+ return Size() != 0u;
+ }
+
+ size_t Size() const {
+ return size_;
+ }
+
+ size_t Alignment() const;
+
+ size_t TypesOffset() const {
+ return types_offset_;
+ }
+
+ size_t TypeOffset(uint32_t type_idx) const;
+
+ size_t TypesSize(size_t num_elements) const;
+
+ size_t TypesAlignment() const;
+
+ size_t MethodsOffset() const {
+ return methods_offset_;
+ }
+
+ size_t MethodOffset(uint32_t method_idx) const;
+
+ size_t MethodsSize(size_t num_elements) const;
+
+ size_t MethodsAlignment() const;
+
+ size_t StringsOffset() const {
+ return strings_offset_;
+ }
+
+ size_t StringOffset(uint32_t string_idx) const;
+
+ size_t StringsSize(size_t num_elements) const;
+
+ size_t StringsAlignment() const;
+
+ size_t FieldsOffset() const {
+ return fields_offset_;
+ }
+
+ size_t FieldOffset(uint32_t field_idx) const;
+
+ size_t FieldsSize(size_t num_elements) const;
+
+ size_t FieldsAlignment() const;
+
+ private:
+ static constexpr size_t types_offset_ = 0u;
+ const size_t pointer_size_; // Must be first for construction initialization order.
+ const size_t methods_offset_;
+ const size_t strings_offset_;
+ const size_t fields_offset_;
+ const size_t size_;
+
+ static size_t Alignment(size_t pointer_size);
+
+ static size_t ElementOffset(size_t element_size, uint32_t idx);
+
+ static size_t ArraySize(size_t element_size, uint32_t num_elements);
+};
+
+} // namespace art
+
+#endif // ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_