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