1 /* 2 * Copyright 2016 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 __VTS_SYSFUZZER_LIBMEASUREMENT_GCDA_FILE_H__ 18 #define __VTS_SYSFUZZER_LIBMEASUREMENT_GCDA_FILE_H__ 19 20 #include <string> 21 22 #include "gcov_basic_io.h" 23 24 using namespace std; 25 26 namespace android { 27 namespace vts { 28 29 // Basic I/O methods for a GCOV file. 30 class GcdaFile { 31 public: GcdaFile(const string & filename)32 explicit GcdaFile(const string& filename) : filename_(filename) {} ~GcdaFile()33 virtual ~GcdaFile() {}; 34 35 // Opens a file. 36 bool Open(); 37 38 // Closes a file and returns any existing error code. 39 int Close(); 40 41 // Synchronizes to the given base and length. 42 void Sync(unsigned base, unsigned length); 43 44 // Reads a string array where the maximum number of strings is also specified. 45 unsigned ReadStringArray(char** string_array, unsigned num_strings); 46 47 // Reads a string. 48 const char* ReadString(); 49 50 // Reads an unsigned integer. 51 unsigned ReadUnsigned(); 52 53 // Reads 'words' number of words. 54 const unsigned* ReadWords(unsigned words); 55 56 // Reads a counter. 57 gcov_type ReadCounter(); 58 59 // Write a block using 'size'. 60 void WriteBlock(unsigned size); 61 62 // Allocates memory for length. 63 void Allocate(unsigned length); 64 65 // Processes the magic tag. 66 int Magic(unsigned magic, unsigned expected); 67 68 // Returns the current position in the file. Position()69 inline unsigned Position() const { 70 return gcov_var_.start + gcov_var_.offset; 71 } 72 73 // Returns non-zero error code if there's an error. IsError()74 inline int IsError() const { 75 return gcov_var_.file ? gcov_var_.error : 1; 76 } 77 78 protected: FromFile(unsigned value)79 inline unsigned FromFile(unsigned value) { 80 if (gcov_var_.endian) { 81 value = (value >> 16) | (value << 16); 82 value = ((value & 0xff00ff) << 8) | ((value >> 8) & 0xff00ff); 83 } 84 return value; 85 } 86 87 private: 88 // The GCOV var data structure for an opened file. 89 struct gcov_var_t gcov_var_; 90 const string& filename_; 91 }; 92 93 } // namespace vts 94 } // namespace android 95 96 #endif 97