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