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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_RUNTIME_COMPILER_CALLBACKS_H_
     18 #define ART_RUNTIME_COMPILER_CALLBACKS_H_
     19 
     20 #include "base/mutex.h"
     21 #include "dex/class_reference.h"
     22 #include "class_status.h"
     23 
     24 namespace art {
     25 
     26 class CompilerDriver;
     27 
     28 namespace mirror {
     29 
     30 class Class;
     31 
     32 }  // namespace mirror
     33 
     34 namespace verifier {
     35 
     36 class MethodVerifier;
     37 class VerifierDeps;
     38 
     39 }  // namespace verifier
     40 
     41 class CompilerCallbacks {
     42  public:
     43   enum class CallbackMode {  // private
     44     kCompileBootImage,
     45     kCompileApp
     46   };
     47 
     48   virtual ~CompilerCallbacks() { }
     49 
     50   virtual void MethodVerified(verifier::MethodVerifier* verifier)
     51       REQUIRES_SHARED(Locks::mutator_lock_) = 0;
     52   virtual void ClassRejected(ClassReference ref) = 0;
     53 
     54   // Return true if we should attempt to relocate to a random base address if we have not already
     55   // done so. Return false if relocating in this way would be problematic.
     56   virtual bool IsRelocationPossible() = 0;
     57 
     58   virtual verifier::VerifierDeps* GetVerifierDeps() const = 0;
     59   virtual void SetVerifierDeps(verifier::VerifierDeps* deps ATTRIBUTE_UNUSED) {}
     60 
     61   // Return the class status of a previous stage of the compilation. This can be used, for example,
     62   // when class unloading is enabled during multidex compilation.
     63   virtual ClassStatus GetPreviousClassState(ClassReference ref ATTRIBUTE_UNUSED) {
     64     return ClassStatus::kNotReady;
     65   }
     66 
     67   virtual void SetDoesClassUnloading(bool does_class_unloading ATTRIBUTE_UNUSED,
     68                                      CompilerDriver* compiler_driver ATTRIBUTE_UNUSED) {}
     69 
     70   bool IsBootImage() {
     71     return mode_ == CallbackMode::kCompileBootImage;
     72   }
     73 
     74   virtual void UpdateClassState(ClassReference ref ATTRIBUTE_UNUSED,
     75                                 ClassStatus state ATTRIBUTE_UNUSED) {}
     76 
     77   virtual bool CanUseOatStatusForVerification(mirror::Class* klass ATTRIBUTE_UNUSED)
     78       REQUIRES_SHARED(Locks::mutator_lock_) {
     79     return false;
     80   }
     81 
     82  protected:
     83   explicit CompilerCallbacks(CallbackMode mode) : mode_(mode) { }
     84 
     85  private:
     86   // Whether the compiler is creating a boot image.
     87   const CallbackMode mode_;
     88 };
     89 
     90 }  // namespace art
     91 
     92 #endif  // ART_RUNTIME_COMPILER_CALLBACKS_H_
     93