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 "profile/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 COMPILER_RT_VISIBILITY void __llvm_profile_set_dumped() { 29 lprofSetProfileDumped(1); 30 } 31 32 /* Return the number of bytes needed to add to SizeInBytes to make it 33 * the result a multiple of 8. 34 */ 35 COMPILER_RT_VISIBILITY uint8_t 36 __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes) { 37 return 7 & (sizeof(uint64_t) - SizeInBytes % sizeof(uint64_t)); 38 } 39 40 COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) { 41 return __llvm_profile_raw_version; 42 } 43 44 COMPILER_RT_VISIBILITY void __llvm_profile_reset_counters(void) { 45 uint64_t *I = __llvm_profile_begin_counters(); 46 uint64_t *E = __llvm_profile_end_counters(); 47 48 memset(I, 0, sizeof(uint64_t) * (E - I)); 49 50 const __llvm_profile_data *DataBegin = __llvm_profile_begin_data(); 51 const __llvm_profile_data *DataEnd = __llvm_profile_end_data(); 52 const __llvm_profile_data *DI; 53 for (DI = DataBegin; DI < DataEnd; ++DI) { 54 uint64_t CurrentVSiteCount = 0; 55 uint32_t VKI, i; 56 if (!DI->Values) 57 continue; 58 59 ValueProfNode **ValueCounters = (ValueProfNode **)DI->Values; 60 61 for (VKI = IPVK_First; VKI <= IPVK_Last; ++VKI) 62 CurrentVSiteCount += DI->NumValueSites[VKI]; 63 64 for (i = 0; i < CurrentVSiteCount; ++i) { 65 ValueProfNode *CurrentVNode = ValueCounters[i]; 66 67 while (CurrentVNode) { 68 CurrentVNode->Count = 0; 69 CurrentVNode = CurrentVNode->Next; 70 } 71 } 72 } 73 lprofSetProfileDumped(0); 74 } 75