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      1 /*
      2  * Copyright 2010, 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_MCCACHEWRITER_H
     18 #define BCC_MCCACHEWRITER_H
     19 
     20 #include <bcc/bcc_mccache.h>
     21 
     22 #include "FileHandle.h"
     23 
     24 #include <map>
     25 #include <string>
     26 #include <utility>
     27 #include <vector>
     28 
     29 namespace bcc {
     30   class Script;
     31 
     32   class MCCacheWriter {
     33   private:
     34     Script *mpOwner;
     35 
     36     FileHandle *mObjFile, *mInfoFile;
     37 
     38     std::vector<std::pair<char const *, size_t> > mStringPool;
     39 
     40     std::map<std::string,
     41              std::pair<uint32_t, unsigned char const *> > mDependencies;
     42 
     43     MCO_Header *mpHeaderSection;
     44     OBCC_StringPool *mpStringPoolSection;
     45     OBCC_DependencyTable *mpDependencyTableSection;
     46     OBCC_PragmaList *mpPragmaListSection;
     47     OBCC_ObjectSlotList *mpObjectSlotSection;
     48 
     49     OBCC_String_Ptr *mpExportVarNameListSection;
     50     OBCC_String_Ptr *mpExportFuncNameListSection;
     51 
     52     std::vector<std::string> varNameList;
     53     std::vector<std::string> funcNameList;
     54 
     55   public:
     56     MCCacheWriter()
     57       : mpHeaderSection(NULL), mpStringPoolSection(NULL),
     58         mpDependencyTableSection(NULL), mpPragmaListSection(NULL),
     59         mpObjectSlotSection(NULL) {
     60     }
     61 
     62     ~MCCacheWriter();
     63 
     64     bool writeCacheFile(FileHandle *objFile, FileHandle *infoFile,
     65                         Script *S, uint32_t libRS_threadable);
     66 
     67     void addDependency(OBCC_ResourceType resType,
     68                        std::string const &resName,
     69                        unsigned char const *sha1) {
     70       mDependencies.insert(std::make_pair(resName,
     71                            std::make_pair((uint32_t)resType, sha1)));
     72     }
     73 
     74   private:
     75     bool prepareHeader(uint32_t libRS_threadable);
     76     bool prepareStringPool();
     77     bool prepareDependencyTable();
     78     bool prepareRelocationTable();
     79     bool preparePragmaList();
     80     bool prepareObjectSlotList();
     81 
     82     bool prepareExportVarNameList();
     83     bool prepareExportFuncNameList();
     84 
     85     bool writeAll();
     86 
     87     bool calcSectionOffset();
     88 
     89     size_t addString(char const *str, size_t size) {
     90       mStringPool.push_back(std::make_pair(str, size));
     91       return mStringPool.size() - 1;
     92     }
     93 
     94   };
     95 
     96 } // namespace bcc
     97 
     98 #endif // BCC_MCCACHEWRITER_H
     99