1 /*===- InstrProfiling.c - Support library for PGO instrumentation ---------===*\ 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 #include <limits.h> 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <string.h> 16 #define INSTR_PROF_VALUE_PROF_DATA 17 #include "InstrProfData.inc" 18 19 char *(*GetEnvHook)(const char *) = 0; 20 21 COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_magic(void) { 22 return sizeof(void *) == sizeof(uint64_t) ? (INSTR_PROF_RAW_MAGIC_64) 23 : (INSTR_PROF_RAW_MAGIC_32); 24 } 25 26 /* Return the number of bytes needed to add to SizeInBytes to make it 27 * the result a multiple of 8. 28 */ 29 COMPILER_RT_VISIBILITY uint8_t 30 __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes) { 31 return 7 & (sizeof(uint64_t) - SizeInBytes % sizeof(uint64_t)); 32 } 33 34 COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) { 35 return INSTR_PROF_RAW_VERSION; 36 } 37 38 COMPILER_RT_VISIBILITY void __llvm_profile_reset_counters(void) { 39 uint64_t *I = __llvm_profile_begin_counters(); 40 uint64_t *E = __llvm_profile_end_counters(); 41 42 memset(I, 0, sizeof(uint64_t) * (E - I)); 43 44 const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); 45 const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); 46 const __llvm_profile_data *DI; 47 for (DI = DataBegin; DI != DataEnd; ++DI) { 48 uint64_t CurrentVSiteCount = 0; 49 uint32_t VKI, i; 50 if (!DI->Values) 51 continue; 52 53 ValueProfNode **ValueCounters = (ValueProfNode **)DI->Values; 54 55 for (VKI = IPVK_First; VKI <= IPVK_Last; ++VKI) 56 CurrentVSiteCount += DI->NumValueSites[VKI]; 57 58 for (i = 0; i < CurrentVSiteCount; ++i) { 59 ValueProfNode *CurrentVNode = ValueCounters[i]; 60 61 while (CurrentVNode) { 62 CurrentVNode->VData.Count = 0; 63 CurrentVNode = CurrentVNode->Next; 64 } 65 } 66 } 67 } 68 69
