1 /*===- InstrProfilingWriter.c - Write instrumentation to a file or buffer -===*\ 2 |* 3 |* The LLVM Compiler Infrastructure 4 |* 5 |* This file is distributed under the University of Illinois Open Source 6 |* License. See LICENSE.TXT for details. 7 |* 8 \*===----------------------------------------------------------------------===*/ 9 10 #include "InstrProfiling.h" 11 #include "InstrProfilingInternal.h" 12 13 COMPILER_RT_VISIBILITY int llvmWriteProfData(WriterCallback Writer, 14 void *WriterCtx, 15 const uint8_t *ValueDataBegin, 16 const uint64_t ValueDataSize) { 17 /* Match logic in __llvm_profile_write_buffer(). */ 18 const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); 19 const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); 20 const uint64_t *CountersBegin = __llvm_profile_begin_counters(); 21 const uint64_t *CountersEnd = __llvm_profile_end_counters(); 22 const char *NamesBegin = __llvm_profile_begin_names(); 23 const char *NamesEnd = __llvm_profile_end_names(); 24 return llvmWriteProfDataImpl(Writer, WriterCtx, DataBegin, DataEnd, 25 CountersBegin, CountersEnd, ValueDataBegin, 26 ValueDataSize, NamesBegin, NamesEnd); 27 } 28 29 COMPILER_RT_VISIBILITY int llvmWriteProfDataImpl( 30 WriterCallback Writer, void *WriterCtx, 31 const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd, 32 const uint64_t *CountersBegin, const uint64_t *CountersEnd, 33 const uint8_t *ValueDataBegin, const uint64_t ValueDataSize, 34 const char *NamesBegin, const char *NamesEnd) { 35 36 /* Calculate size of sections. */ 37 const uint64_t DataSize = DataEnd - DataBegin; 38 const uint64_t CountersSize = CountersEnd - CountersBegin; 39 const uint64_t NamesSize = NamesEnd - NamesBegin; 40 const uint64_t Padding = __llvm_profile_get_num_padding_bytes(NamesSize); 41 42 /* Enough zeroes for padding. */ 43 const char Zeroes[sizeof(uint64_t)] = {0}; 44 45 /* Create the header. */ 46 __llvm_profile_header Header; 47 48 if (!DataSize) 49 return 0; 50 51 /* Initialize header struture. */ 52 #define INSTR_PROF_RAW_HEADER(Type, Name, Init) Header.Name = Init; 53 #include "InstrProfData.inc" 54 55 /* Write the data. */ 56 ProfDataIOVec IOVec[] = { 57 {&Header, sizeof(__llvm_profile_header), 1}, 58 {DataBegin, sizeof(__llvm_profile_data), DataSize}, 59 {CountersBegin, sizeof(uint64_t), CountersSize}, 60 {NamesBegin, sizeof(char), NamesSize}, 61 {Zeroes, sizeof(char), Padding}}; 62 if (Writer(IOVec, sizeof(IOVec) / sizeof(*IOVec), &WriterCtx)) 63 return -1; 64 if (ValueDataBegin) { 65 ProfDataIOVec IOVec2[] = {{ValueDataBegin, sizeof(char), ValueDataSize}}; 66 if (Writer(IOVec2, sizeof(IOVec2) / sizeof(*IOVec2), &WriterCtx)) 67 return -1; 68 } 69 return 0; 70 } 71
