/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "multi_oat_relative_patcher.h"
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#include <android-base/logging.h>
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#include "base/bit_utils.h"
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#include "base/globals.h"
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#include "driver/compiled_method_storage.h"
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namespace art {
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namespace linker {
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void MultiOatRelativePatcher::ThunkProvider::GetThunkCode(const LinkerPatch& patch,
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/*out*/ ArrayRef<const uint8_t>* code,
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/*out*/ std::string* debug_name) {
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*code = storage_->GetThunkCode(patch, debug_name);
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DCHECK(!code->empty());
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}
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MultiOatRelativePatcher::MultiOatRelativePatcher(InstructionSet instruction_set,
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const InstructionSetFeatures* features,
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CompiledMethodStorage* storage)
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: thunk_provider_(storage),
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method_offset_map_(),
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relative_patcher_(RelativePatcher::Create(instruction_set,
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features,
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&thunk_provider_,
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&method_offset_map_)),
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adjustment_(0u),
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instruction_set_(instruction_set),
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start_size_code_alignment_(0u),
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start_size_relative_call_thunks_(0u),
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start_size_misc_thunks_(0u) {
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}
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void MultiOatRelativePatcher::StartOatFile(uint32_t adjustment) {
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DCHECK_ALIGNED(adjustment, kPageSize);
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adjustment_ = adjustment;
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start_size_code_alignment_ = relative_patcher_->CodeAlignmentSize();
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start_size_relative_call_thunks_ = relative_patcher_->RelativeCallThunksSize();
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start_size_misc_thunks_ = relative_patcher_->MiscThunksSize();
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}
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uint32_t MultiOatRelativePatcher::CodeAlignmentSize() const {
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DCHECK_GE(relative_patcher_->CodeAlignmentSize(), start_size_code_alignment_);
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return relative_patcher_->CodeAlignmentSize() - start_size_code_alignment_;
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}
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uint32_t MultiOatRelativePatcher::RelativeCallThunksSize() const {
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DCHECK_GE(relative_patcher_->RelativeCallThunksSize(), start_size_relative_call_thunks_);
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return relative_patcher_->RelativeCallThunksSize() - start_size_relative_call_thunks_;
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}
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uint32_t MultiOatRelativePatcher::MiscThunksSize() const {
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DCHECK_GE(relative_patcher_->MiscThunksSize(), start_size_misc_thunks_);
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return relative_patcher_->MiscThunksSize() - start_size_misc_thunks_;
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}
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std::pair<bool, uint32_t> MultiOatRelativePatcher::MethodOffsetMap::FindMethodOffset(
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MethodReference ref) {
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auto it = map.find(ref);
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if (it == map.end()) {
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return std::pair<bool, uint32_t>(false, 0u);
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} else {
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return std::pair<bool, uint32_t>(true, it->second);
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}
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}
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} // namespace linker
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} // namespace art
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