Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 1 | /*===- InstrProfilingBuffer.c - Write instrumentation to a memory 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" |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 11 | #include "InstrProfilingInternal.h" |
| 12 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 13 | #include <string.h> |
| 14 | |
| 15 | __attribute__((visibility("hidden"))) |
| 16 | uint64_t __llvm_profile_get_size_for_buffer(void) { |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 17 | const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); |
| 18 | const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); |
| 19 | const uint64_t *CountersBegin = __llvm_profile_begin_counters(); |
| 20 | const uint64_t *CountersEnd = __llvm_profile_end_counters(); |
| 21 | const char *NamesBegin = __llvm_profile_begin_names(); |
| 22 | const char *NamesEnd = __llvm_profile_end_names(); |
| 23 | |
| 24 | return __llvm_profile_get_size_for_buffer_internal( |
| 25 | DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd); |
| 26 | } |
| 27 | |
| 28 | #define PROFILE_RANGE_SIZE(Range) (Range##End - Range##Begin) |
| 29 | |
| 30 | __attribute__((visibility("hidden"))) |
| 31 | uint64_t __llvm_profile_get_size_for_buffer_internal( |
| 32 | const __llvm_profile_data *DataBegin, |
| 33 | const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin, |
| 34 | const uint64_t *CountersEnd, const char *NamesBegin, |
| 35 | const char *NamesEnd) { |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 36 | /* Match logic in __llvm_profile_write_buffer(). */ |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 37 | const uint64_t NamesSize = PROFILE_RANGE_SIZE(Names) * sizeof(char); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 38 | const uint64_t Padding = sizeof(uint64_t) - NamesSize % sizeof(uint64_t); |
| 39 | return sizeof(uint64_t) * PROFILE_HEADER_SIZE + |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 40 | PROFILE_RANGE_SIZE(Data) * sizeof(__llvm_profile_data) + |
| 41 | PROFILE_RANGE_SIZE(Counters) * sizeof(uint64_t) + |
| 42 | NamesSize + Padding; |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | __attribute__((visibility("hidden"))) |
| 46 | int __llvm_profile_write_buffer(char *Buffer) { |
| 47 | /* Match logic in __llvm_profile_get_size_for_buffer(). |
| 48 | * Match logic in __llvm_profile_write_file(). |
| 49 | */ |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 50 | const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); |
| 51 | const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); |
| 52 | const uint64_t *CountersBegin = __llvm_profile_begin_counters(); |
| 53 | const uint64_t *CountersEnd = __llvm_profile_end_counters(); |
| 54 | const char *NamesBegin = __llvm_profile_begin_names(); |
| 55 | const char *NamesEnd = __llvm_profile_end_names(); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 56 | |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 57 | return __llvm_profile_write_buffer_internal(Buffer, DataBegin, DataEnd, |
| 58 | CountersBegin, CountersEnd, |
| 59 | NamesBegin, NamesEnd); |
| 60 | } |
| 61 | |
| 62 | __attribute__((visibility("hidden"))) |
| 63 | int __llvm_profile_write_buffer_internal( |
| 64 | char *Buffer, const __llvm_profile_data *DataBegin, |
| 65 | const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin, |
| 66 | const uint64_t *CountersEnd, const char *NamesBegin, const char *NamesEnd) { |
| 67 | /* Match logic in __llvm_profile_get_size_for_buffer(). |
| 68 | * Match logic in __llvm_profile_write_file(). |
| 69 | */ |
| 70 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 71 | /* Calculate size of sections. */ |
| 72 | const uint64_t DataSize = DataEnd - DataBegin; |
| 73 | const uint64_t CountersSize = CountersEnd - CountersBegin; |
| 74 | const uint64_t NamesSize = NamesEnd - NamesBegin; |
| 75 | const uint64_t Padding = sizeof(uint64_t) - NamesSize % sizeof(uint64_t); |
| 76 | |
| 77 | /* Enough zeroes for padding. */ |
| 78 | const char Zeroes[sizeof(uint64_t)] = {0}; |
| 79 | |
| 80 | /* Create the header. */ |
| 81 | uint64_t Header[PROFILE_HEADER_SIZE]; |
| 82 | Header[0] = __llvm_profile_get_magic(); |
| 83 | Header[1] = __llvm_profile_get_version(); |
| 84 | Header[2] = DataSize; |
| 85 | Header[3] = CountersSize; |
| 86 | Header[4] = NamesSize; |
| 87 | Header[5] = (uintptr_t)CountersBegin; |
| 88 | Header[6] = (uintptr_t)NamesBegin; |
| 89 | |
| 90 | /* Write the data. */ |
| 91 | #define UPDATE_memcpy(Data, Size) \ |
| 92 | do { \ |
| 93 | memcpy(Buffer, Data, Size); \ |
| 94 | Buffer += Size; \ |
| 95 | } while (0) |
| 96 | UPDATE_memcpy(Header, PROFILE_HEADER_SIZE * sizeof(uint64_t)); |
| 97 | UPDATE_memcpy(DataBegin, DataSize * sizeof(__llvm_profile_data)); |
| 98 | UPDATE_memcpy(CountersBegin, CountersSize * sizeof(uint64_t)); |
| 99 | UPDATE_memcpy(NamesBegin, NamesSize * sizeof(char)); |
| 100 | UPDATE_memcpy(Zeroes, Padding * sizeof(char)); |
| 101 | #undef UPDATE_memcpy |
| 102 | |
| 103 | return 0; |
| 104 | } |