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Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
[FreeBSD/FreeBSD.git] / contrib / llvm-project / compiler-rt / lib / profile / InstrProfiling.c
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 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 }