1 /*===- InstrProfiling.c - Support library for PGO instrumentation ---------===*\ 2 |* 3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 |* See https://llvm.org/LICENSE.txt for license information. 5 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 |* 7 \*===----------------------------------------------------------------------===*/ 8 9 #include <limits.h> 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 14 #include "InstrProfiling.h" 15 #include "InstrProfilingInternal.h" 16 17 #define INSTR_PROF_VALUE_PROF_DATA 18 #include "InstrProfData.inc" 19 20 21 COMPILER_RT_WEAK uint64_t INSTR_PROF_RAW_VERSION_VAR = INSTR_PROF_RAW_VERSION; 22 23 COMPILER_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 static unsigned ProfileDumped = 0; 29 30 COMPILER_RT_VISIBILITY unsigned lprofProfileDumped() { 31 return ProfileDumped; 32 } 33 34 COMPILER_RT_VISIBILITY void lprofSetProfileDumped() { 35 ProfileDumped = 1; 36 } 37 38 COMPILER_RT_VISIBILITY void __llvm_profile_set_dumped() { 39 lprofSetProfileDumped(); 40 } 41 42 /* Return the number of bytes needed to add to SizeInBytes to make it 43 * the result a multiple of 8. 44 */ 45 COMPILER_RT_VISIBILITY uint8_t 46 __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes) { 47 return 7 & (sizeof(uint64_t) - SizeInBytes % sizeof(uint64_t)); 48 } 49 50 COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) { 51 return __llvm_profile_raw_version; 52 } 53 54 COMPILER_RT_VISIBILITY void __llvm_profile_reset_counters(void) { 55 uint64_t *I = __llvm_profile_begin_counters(); 56 uint64_t *E = __llvm_profile_end_counters(); 57 58 memset(I, 0, sizeof(uint64_t) * (E - I)); 59 60 const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); 61 const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); 62 const __llvm_profile_data *DI; 63 for (DI = DataBegin; DI < DataEnd; ++DI) { 64 uint64_t CurrentVSiteCount = 0; 65 uint32_t VKI, i; 66 if (!DI->Values) 67 continue; 68 69 ValueProfNode **ValueCounters = (ValueProfNode **)DI->Values; 70 71 for (VKI = IPVK_First; VKI <= IPVK_Last; ++VKI) 72 CurrentVSiteCount += DI->NumValueSites[VKI]; 73 74 for (i = 0; i < CurrentVSiteCount; ++i) { 75 ValueProfNode *CurrentVNode = ValueCounters[i]; 76 77 while (CurrentVNode) { 78 CurrentVNode->Count = 0; 79 CurrentVNode = CurrentVNode->Next; 80 } 81 } 82 } 83 ProfileDumped = 0; 84 } 85