77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
/*
|
|
* Copyright (C) 2017 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_METHOD_INFO_H_
|
|
#define ART_RUNTIME_METHOD_INFO_H_
|
|
|
|
#include "base/logging.h"
|
|
#include "leb128.h"
|
|
#include "memory_region.h"
|
|
|
|
namespace art {
|
|
|
|
// Method info is for not dedupe friendly data of a method. Currently it only holds methods indices.
|
|
// Putting this data in MethodInfo instead of code infos saves ~5% oat size.
|
|
class MethodInfo {
|
|
using MethodIndexType = uint16_t;
|
|
|
|
public:
|
|
// Reading mode
|
|
explicit MethodInfo(const uint8_t* ptr) {
|
|
if (ptr != nullptr) {
|
|
num_method_indices_ = DecodeUnsignedLeb128(&ptr);
|
|
region_ = MemoryRegion(const_cast<uint8_t*>(ptr),
|
|
num_method_indices_ * sizeof(MethodIndexType));
|
|
}
|
|
}
|
|
|
|
// Writing mode
|
|
MethodInfo(uint8_t* ptr, size_t num_method_indices) : num_method_indices_(num_method_indices) {
|
|
DCHECK(ptr != nullptr);
|
|
ptr = EncodeUnsignedLeb128(ptr, num_method_indices_);
|
|
region_ = MemoryRegion(ptr, num_method_indices_ * sizeof(MethodIndexType));
|
|
}
|
|
|
|
static size_t ComputeSize(size_t num_method_indices) {
|
|
uint8_t temp[8];
|
|
uint8_t* ptr = temp;
|
|
ptr = EncodeUnsignedLeb128(ptr, num_method_indices);
|
|
return (ptr - temp) + num_method_indices * sizeof(MethodIndexType);
|
|
}
|
|
|
|
ALWAYS_INLINE MethodIndexType GetMethodIndex(size_t index) const {
|
|
// Use bit functions to avoid pesky alignment requirements.
|
|
return region_.LoadBits(index * BitSizeOf<MethodIndexType>(), BitSizeOf<MethodIndexType>());
|
|
}
|
|
|
|
void SetMethodIndex(size_t index, MethodIndexType method_index) {
|
|
region_.StoreBits(index * BitSizeOf<MethodIndexType>(),
|
|
method_index,
|
|
BitSizeOf<MethodIndexType>());
|
|
}
|
|
|
|
size_t NumMethodIndices() const {
|
|
return num_method_indices_;
|
|
}
|
|
|
|
private:
|
|
size_t num_method_indices_ = 0u;
|
|
MemoryRegion region_;
|
|
};
|
|
|
|
} // namespace art
|
|
|
|
#endif // ART_RUNTIME_METHOD_INFO_H_
|