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 COMPILER_RT_VISIBILITY char *(*GetEnvHook)(const char *) = 0; 20 21 COMPILER_RT_WEAK uint64_t __llvm_profile_raw_version = INSTR_PROF_RAW_VERSION; 22 __llvm_profile_get_magic(void)23COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_magic(void) { 24 return sizeof(void *) == sizeof(uint64_t) ? (INSTR_PROF_RAW_MAGIC_64) 25 : (INSTR_PROF_RAW_MAGIC_32); 26 } 27 28 /* Return the number of bytes needed to add to SizeInBytes to make it 29 * the result a multiple of 8. 30 */ 31 COMPILER_RT_VISIBILITY uint8_t __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes)32__llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes) { 33 return 7 & (sizeof(uint64_t) - SizeInBytes % sizeof(uint64_t)); 34 } 35 __llvm_profile_get_version(void)36COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) { 37 return __llvm_profile_raw_version; 38 } 39 __llvm_profile_reset_counters(void)40COMPILER_RT_VISIBILITY void __llvm_profile_reset_counters(void) { 41 uint64_t *I = __llvm_profile_begin_counters(); 42 uint64_t *E = __llvm_profile_end_counters(); 43 44 memset(I, 0, sizeof(uint64_t) * (E - I)); 45 46 const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); 47 const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); 48 const __llvm_profile_data *DI; 49 for (DI = DataBegin; DI < DataEnd; ++DI) { 50 uint64_t CurrentVSiteCount = 0; 51 uint32_t VKI, i; 52 if (!DI->Values) 53 continue; 54 55 ValueProfNode **ValueCounters = (ValueProfNode **)DI->Values; 56 57 for (VKI = IPVK_First; VKI <= IPVK_Last; ++VKI) 58 CurrentVSiteCount += DI->NumValueSites[VKI]; 59 60 for (i = 0; i < CurrentVSiteCount; ++i) { 61 ValueProfNode *CurrentVNode = ValueCounters[i]; 62 63 while (CurrentVNode) { 64 CurrentVNode->Count = 0; 65 CurrentVNode = CurrentVNode->Next; 66 } 67 } 68 } 69 } 70