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      1 /*
      2  * Copyright 2010-2012, 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 BCC_SOURCE_H
     18 #define BCC_SOURCE_H
     19 
     20 #include <string>
     21 
     22 namespace llvm {
     23   class Module;
     24 }
     25 
     26 namespace bcc {
     27 
     28 class BCCContext;
     29 
     30 class Source {
     31 private:
     32   BCCContext &mContext;
     33   llvm::Module *mModule;
     34 
     35   // If true, destructor won't destroy the mModule.
     36   bool mNoDelete;
     37 
     38 private:
     39   Source(BCCContext &pContext, llvm::Module &pModule, bool pNoDelete = false);
     40 
     41 public:
     42   static Source *CreateFromBuffer(BCCContext &pContext,
     43                                   const char *pName,
     44                                   const char *pBitcode,
     45                                   size_t pBitcodeSize);
     46 
     47   static Source *CreateFromFile(BCCContext &pContext,
     48                                 const std::string &pPath);
     49 
     50   static Source *CreateFromFd(BCCContext &pContext, int pFd);
     51 
     52   // Create a Source object from an existing module. If pNoDelete
     53   // is true, destructor won't call delete on the given module.
     54   static Source *CreateFromModule(BCCContext &pContext,
     55                                   llvm::Module &pModule,
     56                                   bool pNoDelete = false);
     57 
     58   static Source *CreateEmpty(BCCContext &pContext, const std::string &pName);
     59 
     60   // Merge the current source with pSource. If pPreserveSource is false, pSource
     61   // will be destroyed after successfully merged. Return false on error.
     62   bool merge(Source &pSource, bool pPreserveSource = false);
     63 
     64   inline BCCContext &getContext()
     65   { return mContext; }
     66   inline const BCCContext &getContext() const
     67   { return mContext; }
     68 
     69   void setModule(llvm::Module *pModule);
     70 
     71   inline llvm::Module &getModule()
     72   { return *mModule;  }
     73   inline const llvm::Module &getModule() const
     74   { return *mModule;  }
     75 
     76   // Get the "identifier" of the bitcode. This will return the value of pName
     77   // when it's created using CreateFromBuffer and pPath if CreateFromFile().
     78   const std::string &getIdentifier() const;
     79 
     80   ~Source();
     81 };
     82 
     83 } // namespace bcc
     84 
     85 #endif // BCC_SOURCE_H
     86