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