/*
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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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#ifndef ART_COMPILER_DEX_VERIFIED_METHOD_H_
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#define ART_COMPILER_DEX_VERIFIED_METHOD_H_
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#include <vector>
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#include "base/mutex.h"
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#include "base/safe_map.h"
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#include "dex/dex_file.h"
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#include "dex/method_reference.h"
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namespace art {
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namespace verifier {
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class MethodVerifier;
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} // namespace verifier
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class VerifiedMethod {
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public:
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VerifiedMethod(uint32_t encountered_error_types, bool has_runtime_throw);
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// Cast elision set type.
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// Since we're adding the dex PCs to the set in increasing order, a sorted vector
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// is better for performance (not just memory usage), especially for large sets.
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typedef std::vector<uint32_t> SafeCastSet;
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static const VerifiedMethod* Create(verifier::MethodVerifier* method_verifier)
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REQUIRES_SHARED(Locks::mutator_lock_);
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~VerifiedMethod() = default;
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const SafeCastSet* GetSafeCastSet() const {
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return safe_cast_set_.get();
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}
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// Returns true if the cast can statically be verified to be redundant
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// by using the check-cast elision peephole optimization in the verifier.
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bool IsSafeCast(uint32_t pc) const;
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// Returns true if there were any errors during verification.
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bool HasVerificationFailures() const {
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return encountered_error_types_ != 0;
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}
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uint32_t GetEncounteredVerificationFailures() const {
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return encountered_error_types_;
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}
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bool HasRuntimeThrow() const {
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return has_runtime_throw_;
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}
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private:
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// Generate safe case set into safe_cast_set_.
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void GenerateSafeCastSet(verifier::MethodVerifier* method_verifier)
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REQUIRES_SHARED(Locks::mutator_lock_);
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std::unique_ptr<SafeCastSet> safe_cast_set_;
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const uint32_t encountered_error_types_;
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const bool has_runtime_throw_;
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};
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} // namespace art
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#endif // ART_COMPILER_DEX_VERIFIED_METHOD_H_
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