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
21COMPILER_RT_WEAK uint64_t INSTR_PROF_RAW_VERSION_VAR = INSTR_PROF_RAW_VERSION;
22
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
28COMPILER_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 */
35COMPILER_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
40COMPILER_RT_VISIBILITY uint64_t __llvm_profile_get_version(void) {
41  return __llvm_profile_raw_version;
42}
43
44COMPILER_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