1 /*===- InstrProfiling.c - Support library for PGO instrumentation ---------===*\
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
7 \*===----------------------------------------------------------------------===*/
14 #include "InstrProfiling.h"
15 #include "InstrProfilingInternal.h"
17 #define INSTR_PROF_VALUE_PROF_DATA
18 #include "profile/InstrProfData.inc"
21 COMPILER_RT_WEAK uint64_t INSTR_PROF_RAW_VERSION_VAR = INSTR_PROF_RAW_VERSION;
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);
28 static unsigned ProfileDumped = 0;
30 COMPILER_RT_VISIBILITY unsigned lprofProfileDumped() {
34 COMPILER_RT_VISIBILITY void lprofSetProfileDumped() {
38 COMPILER_RT_VISIBILITY void __llvm_profile_set_dumped() {
39 lprofSetProfileDumped();
42 /* Return the number of bytes needed to add to SizeInBytes to make it
43 * the result a multiple of 8.
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));
50 COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) {
51 return __llvm_profile_raw_version;
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();
58 memset(I, 0, sizeof(uint64_t) * (E - I));
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;
69 ValueProfNode **ValueCounters = (ValueProfNode **)DI->Values;
71 for (VKI = IPVK_First; VKI <= IPVK_Last; ++VKI)
72 CurrentVSiteCount += DI->NumValueSites[VKI];
74 for (i = 0; i < CurrentVSiteCount; ++i) {
75 ValueProfNode *CurrentVNode = ValueCounters[i];
77 while (CurrentVNode) {
78 CurrentVNode->Count = 0;
79 CurrentVNode = CurrentVNode->Next;