/*
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* Copyright (C) 2011 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 "compiled_method.h"
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#include "driver/compiled_method_storage.h"
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#include "utils/swap_space.h"
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namespace art {
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CompiledCode::CompiledCode(CompiledMethodStorage* storage,
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InstructionSet instruction_set,
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const ArrayRef<const uint8_t>& quick_code)
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: storage_(storage),
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quick_code_(storage->DeduplicateCode(quick_code)),
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packed_fields_(InstructionSetField::Encode(instruction_set)) {
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}
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CompiledCode::~CompiledCode() {
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GetStorage()->ReleaseCode(quick_code_);
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}
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bool CompiledCode::operator==(const CompiledCode& rhs) const {
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if (quick_code_ != nullptr) {
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if (rhs.quick_code_ == nullptr) {
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return false;
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} else if (quick_code_->size() != rhs.quick_code_->size()) {
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return false;
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} else {
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return std::equal(quick_code_->begin(), quick_code_->end(), rhs.quick_code_->begin());
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}
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}
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return (rhs.quick_code_ == nullptr);
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}
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size_t CompiledCode::AlignCode(size_t offset) const {
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return AlignCode(offset, GetInstructionSet());
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}
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size_t CompiledCode::AlignCode(size_t offset, InstructionSet instruction_set) {
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return RoundUp(offset, GetInstructionSetAlignment(instruction_set));
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}
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size_t CompiledCode::CodeDelta() const {
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return CodeDelta(GetInstructionSet());
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}
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size_t CompiledCode::CodeDelta(InstructionSet instruction_set) {
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switch (instruction_set) {
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case InstructionSet::kArm:
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case InstructionSet::kArm64:
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case InstructionSet::kMips:
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case InstructionSet::kMips64:
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case InstructionSet::kX86:
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case InstructionSet::kX86_64:
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return 0;
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case InstructionSet::kThumb2: {
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// +1 to set the low-order bit so a BLX will switch to Thumb mode
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return 1;
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}
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default:
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LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
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UNREACHABLE();
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}
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}
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const void* CompiledCode::CodePointer(const void* code_pointer, InstructionSet instruction_set) {
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switch (instruction_set) {
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case InstructionSet::kArm:
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case InstructionSet::kArm64:
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case InstructionSet::kMips:
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case InstructionSet::kMips64:
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case InstructionSet::kX86:
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case InstructionSet::kX86_64:
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return code_pointer;
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case InstructionSet::kThumb2: {
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uintptr_t address = reinterpret_cast<uintptr_t>(code_pointer);
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// Set the low-order bit so a BLX will switch to Thumb mode
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address |= 0x1;
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return reinterpret_cast<const void*>(address);
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}
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default:
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LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
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UNREACHABLE();
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}
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}
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CompiledMethod::CompiledMethod(CompiledMethodStorage* storage,
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InstructionSet instruction_set,
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const ArrayRef<const uint8_t>& quick_code,
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const ArrayRef<const uint8_t>& vmap_table,
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const ArrayRef<const uint8_t>& cfi_info,
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const ArrayRef<const linker::LinkerPatch>& patches)
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: CompiledCode(storage, instruction_set, quick_code),
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vmap_table_(storage->DeduplicateVMapTable(vmap_table)),
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cfi_info_(storage->DeduplicateCFIInfo(cfi_info)),
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patches_(storage->DeduplicateLinkerPatches(patches)) {
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}
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CompiledMethod* CompiledMethod::SwapAllocCompiledMethod(
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CompiledMethodStorage* storage,
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InstructionSet instruction_set,
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const ArrayRef<const uint8_t>& quick_code,
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const ArrayRef<const uint8_t>& vmap_table,
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const ArrayRef<const uint8_t>& cfi_info,
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const ArrayRef<const linker::LinkerPatch>& patches) {
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SwapAllocator<CompiledMethod> alloc(storage->GetSwapSpaceAllocator());
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CompiledMethod* ret = alloc.allocate(1);
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alloc.construct(ret,
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storage,
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instruction_set,
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quick_code,
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vmap_table,
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cfi_info, patches);
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return ret;
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}
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void CompiledMethod::ReleaseSwapAllocatedCompiledMethod(CompiledMethodStorage* storage,
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CompiledMethod* m) {
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SwapAllocator<CompiledMethod> alloc(storage->GetSwapSpaceAllocator());
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alloc.destroy(m);
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alloc.deallocate(m, 1);
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}
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CompiledMethod::~CompiledMethod() {
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CompiledMethodStorage* storage = GetStorage();
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storage->ReleaseLinkerPatches(patches_);
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storage->ReleaseCFIInfo(cfi_info_);
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storage->ReleaseVMapTable(vmap_table_);
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}
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} // namespace art
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