| /*===- InstrProfilingBuffer.c - Write instrumentation to a memory buffer --===*\ |
| |* |
| |* The LLVM Compiler Infrastructure |
| |* |
| |* This file is distributed under the University of Illinois Open Source |
| |* License. See LICENSE.TXT for details. |
| |* |
| \*===----------------------------------------------------------------------===*/ |
| |
| #include "InstrProfiling.h" |
| #include "InstrProfilingInternal.h" |
| |
| #include <string.h> |
| |
| __attribute__((visibility("hidden"))) |
| uint64_t __llvm_profile_get_size_for_buffer(void) { |
| const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); |
| const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); |
| const uint64_t *CountersBegin = __llvm_profile_begin_counters(); |
| const uint64_t *CountersEnd = __llvm_profile_end_counters(); |
| const char *NamesBegin = __llvm_profile_begin_names(); |
| const char *NamesEnd = __llvm_profile_end_names(); |
| |
| return __llvm_profile_get_size_for_buffer_internal( |
| DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd); |
| } |
| |
| #define PROFILE_RANGE_SIZE(Range) (Range##End - Range##Begin) |
| |
| __attribute__((visibility("hidden"))) |
| uint64_t __llvm_profile_get_size_for_buffer_internal( |
| const __llvm_profile_data *DataBegin, |
| const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin, |
| const uint64_t *CountersEnd, const char *NamesBegin, |
| const char *NamesEnd) { |
| /* Match logic in __llvm_profile_write_buffer(). */ |
| const uint64_t NamesSize = PROFILE_RANGE_SIZE(Names) * sizeof(char); |
| const uint64_t Padding = sizeof(uint64_t) - NamesSize % sizeof(uint64_t); |
| return sizeof(uint64_t) * PROFILE_HEADER_SIZE + |
| PROFILE_RANGE_SIZE(Data) * sizeof(__llvm_profile_data) + |
| PROFILE_RANGE_SIZE(Counters) * sizeof(uint64_t) + |
| NamesSize + Padding; |
| } |
| |
| __attribute__((visibility("hidden"))) |
| int __llvm_profile_write_buffer(char *Buffer) { |
| /* Match logic in __llvm_profile_get_size_for_buffer(). |
| * Match logic in __llvm_profile_write_file(). |
| */ |
| const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); |
| const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); |
| const uint64_t *CountersBegin = __llvm_profile_begin_counters(); |
| const uint64_t *CountersEnd = __llvm_profile_end_counters(); |
| const char *NamesBegin = __llvm_profile_begin_names(); |
| const char *NamesEnd = __llvm_profile_end_names(); |
| |
| return __llvm_profile_write_buffer_internal(Buffer, DataBegin, DataEnd, |
| CountersBegin, CountersEnd, |
| NamesBegin, NamesEnd); |
| } |
| |
| __attribute__((visibility("hidden"))) |
| int __llvm_profile_write_buffer_internal( |
| char *Buffer, const __llvm_profile_data *DataBegin, |
| const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin, |
| const uint64_t *CountersEnd, const char *NamesBegin, const char *NamesEnd) { |
| /* Match logic in __llvm_profile_get_size_for_buffer(). |
| * Match logic in __llvm_profile_write_file(). |
| */ |
| |
| /* Calculate size of sections. */ |
| const uint64_t DataSize = DataEnd - DataBegin; |
| const uint64_t CountersSize = CountersEnd - CountersBegin; |
| const uint64_t NamesSize = NamesEnd - NamesBegin; |
| const uint64_t Padding = sizeof(uint64_t) - NamesSize % sizeof(uint64_t); |
| |
| /* Enough zeroes for padding. */ |
| const char Zeroes[sizeof(uint64_t)] = {0}; |
| |
| /* Create the header. */ |
| uint64_t Header[PROFILE_HEADER_SIZE]; |
| Header[0] = __llvm_profile_get_magic(); |
| Header[1] = __llvm_profile_get_version(); |
| Header[2] = DataSize; |
| Header[3] = CountersSize; |
| Header[4] = NamesSize; |
| Header[5] = (uintptr_t)CountersBegin; |
| Header[6] = (uintptr_t)NamesBegin; |
| |
| /* Write the data. */ |
| #define UPDATE_memcpy(Data, Size) \ |
| do { \ |
| memcpy(Buffer, Data, Size); \ |
| Buffer += Size; \ |
| } while (0) |
| UPDATE_memcpy(Header, PROFILE_HEADER_SIZE * sizeof(uint64_t)); |
| UPDATE_memcpy(DataBegin, DataSize * sizeof(__llvm_profile_data)); |
| UPDATE_memcpy(CountersBegin, CountersSize * sizeof(uint64_t)); |
| UPDATE_memcpy(NamesBegin, NamesSize * sizeof(char)); |
| UPDATE_memcpy(Zeroes, Padding * sizeof(char)); |
| #undef UPDATE_memcpy |
| |
| return 0; |
| } |