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/*
* Copyright (C) 2014 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 "compiler.h"
#include <android-base/logging.h>
#include "base/macros.h"
#include "base/utils.h"
#include "dex/code_item_accessors-inl.h"
#include "dex/dex_file.h"
#include "oat.h"
#include "optimizing/optimizing_compiler.h"
namespace art HIDDEN {
Compiler* Compiler::Create(const CompilerOptions& compiler_options,
CompiledCodeStorage* storage,
Compiler::Kind kind) {
// Check that oat version when runtime was compiled matches the oat version of the compiler.
constexpr std::array<uint8_t, 4> compiler_oat_version = OatHeader::kOatVersion;
OatHeader::CheckOatVersion(compiler_oat_version);
switch (kind) {
case kQuick:
// TODO: Remove Quick in options.
case kOptimizing:
return CreateOptimizingCompiler(compiler_options, storage);
default:
LOG(FATAL) << "UNREACHABLE";
UNREACHABLE();
}
}
bool Compiler::IsPathologicalCase(const dex::CodeItem& code_item,
uint32_t method_idx,
const DexFile& dex_file) {
/*
* Skip compilation for pathologically large methods - either by instruction count or num vregs.
* Dalvik uses 16-bit uints for instruction and register counts. We'll limit to a quarter
* of that, which also guarantees we cannot overflow our 16-bit internal Quick SSA name space.
*/
CodeItemDataAccessor accessor(dex_file, &code_item);
if (accessor.InsnsSizeInCodeUnits() >= UINT16_MAX / 4) {
LOG(INFO) << "Method exceeds compiler instruction limit: "
<< accessor.InsnsSizeInCodeUnits()
<< " in " << dex_file.PrettyMethod(method_idx);
return true;
}
if (accessor.RegistersSize() >= UINT16_MAX / 4) {
LOG(INFO) << "Method exceeds compiler virtual register limit: "
<< accessor.RegistersSize() << " in " << dex_file.PrettyMethod(method_idx);
return true;
}
return false;
}
} // namespace art
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