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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ART_COMPILER_DEX_VERIFICATION_RESULTS_H_
     18 #define ART_COMPILER_DEX_VERIFICATION_RESULTS_H_
     19 
     20 #include <stdint.h>
     21 #include <set>
     22 
     23 #include "base/dchecked_vector.h"
     24 #include "base/macros.h"
     25 #include "base/mutex.h"
     26 #include "class_reference.h"
     27 #include "method_reference.h"
     28 #include "safe_map.h"
     29 #include "utils/atomic_dex_ref_map.h"
     30 
     31 namespace art {
     32 
     33 namespace verifier {
     34 class MethodVerifier;
     35 class VerifierDepsTest;
     36 }  // namespace verifier
     37 
     38 class CompilerOptions;
     39 class VerifiedMethod;
     40 
     41 // Used by CompilerCallbacks to track verification information from the Runtime.
     42 class VerificationResults {
     43  public:
     44   explicit VerificationResults(const CompilerOptions* compiler_options);
     45   ~VerificationResults();
     46 
     47   void ProcessVerifiedMethod(verifier::MethodVerifier* method_verifier)
     48       REQUIRES_SHARED(Locks::mutator_lock_)
     49       REQUIRES(!verified_methods_lock_);
     50 
     51   void CreateVerifiedMethodFor(MethodReference ref)
     52       REQUIRES(!verified_methods_lock_);
     53 
     54   const VerifiedMethod* GetVerifiedMethod(MethodReference ref)
     55       REQUIRES(!verified_methods_lock_);
     56 
     57   void AddRejectedClass(ClassReference ref) REQUIRES(!rejected_classes_lock_);
     58   bool IsClassRejected(ClassReference ref) REQUIRES(!rejected_classes_lock_);
     59 
     60   bool IsCandidateForCompilation(MethodReference& method_ref, const uint32_t access_flags);
     61 
     62   // Add a dex file to enable using the atomic map.
     63   void AddDexFile(const DexFile* dex_file) REQUIRES(!verified_methods_lock_);
     64 
     65  private:
     66   // Verified methods. The method array is fixed to avoid needing a lock to extend it.
     67   using AtomicMap = AtomicDexRefMap<const VerifiedMethod*>;
     68   using VerifiedMethodMap = SafeMap<MethodReference,
     69                                     const VerifiedMethod*,
     70                                     MethodReferenceComparator>;
     71 
     72   VerifiedMethodMap verified_methods_ GUARDED_BY(verified_methods_lock_);
     73   const CompilerOptions* const compiler_options_;
     74 
     75   // Dex2oat can add dex files to atomic_verified_methods_ to avoid locking when calling
     76   // GetVerifiedMethod.
     77   AtomicMap atomic_verified_methods_;
     78 
     79   ReaderWriterMutex verified_methods_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
     80 
     81   // Rejected classes.
     82   ReaderWriterMutex rejected_classes_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
     83   std::set<ClassReference> rejected_classes_ GUARDED_BY(rejected_classes_lock_);
     84 
     85   friend class verifier::VerifierDepsTest;
     86 };
     87 
     88 }  // namespace art
     89 
     90 #endif  // ART_COMPILER_DEX_VERIFICATION_RESULTS_H_
     91