1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
//=-- SampleProf.cpp - Sample profiling format support --------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains common definitions used in the reading and writing of
// sample profile data.
//
//===----------------------------------------------------------------------===//
#include "llvm/ProfileData/SampleProf.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/raw_ostream.h"
#include <string>
#include <system_error>
using namespace llvm;
using namespace sampleprof;
namespace llvm {
namespace sampleprof {
SampleProfileFormat FunctionSamples::Format;
DenseMap<uint64_t, StringRef> FunctionSamples::GUIDToFuncNameMap;
Module *FunctionSamples::CurrentModule;
} // namespace sampleprof
} // namespace llvm
namespace {
// FIXME: This class is only here to support the transition to llvm::Error. It
// will be removed once this transition is complete. Clients should prefer to
// deal with the Error value directly, rather than converting to error_code.
class SampleProfErrorCategoryType : public std::error_category {
const char *name() const noexcept override { return "llvm.sampleprof"; }
std::string message(int IE) const override {
sampleprof_error E = static_cast<sampleprof_error>(IE);
switch (E) {
case sampleprof_error::success:
return "Success";
case sampleprof_error::bad_magic:
return "Invalid sample profile data (bad magic)";
case sampleprof_error::unsupported_version:
return "Unsupported sample profile format version";
case sampleprof_error::too_large:
return "Too much profile data";
case sampleprof_error::truncated:
return "Truncated profile data";
case sampleprof_error::malformed:
return "Malformed sample profile data";
case sampleprof_error::unrecognized_format:
return "Unrecognized sample profile encoding format";
case sampleprof_error::unsupported_writing_format:
return "Profile encoding format unsupported for writing operations";
case sampleprof_error::truncated_name_table:
return "Truncated function name table";
case sampleprof_error::not_implemented:
return "Unimplemented feature";
case sampleprof_error::counter_overflow:
return "Counter overflow";
case sampleprof_error::ostream_seek_unsupported:
return "Ostream does not support seek";
}
llvm_unreachable("A value of sampleprof_error has no message.");
}
};
} // end anonymous namespace
static ManagedStatic<SampleProfErrorCategoryType> ErrorCategory;
const std::error_category &llvm::sampleprof_category() {
return *ErrorCategory;
}
void LineLocation::print(raw_ostream &OS) const {
OS << LineOffset;
if (Discriminator > 0)
OS << "." << Discriminator;
}
raw_ostream &llvm::sampleprof::operator<<(raw_ostream &OS,
const LineLocation &Loc) {
Loc.print(OS);
return OS;
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void LineLocation::dump() const { print(dbgs()); }
#endif
/// Print the sample record to the stream \p OS indented by \p Indent.
void SampleRecord::print(raw_ostream &OS, unsigned Indent) const {
OS << NumSamples;
if (hasCalls()) {
OS << ", calls:";
for (const auto &I : getCallTargets())
OS << " " << I.first() << ":" << I.second;
}
OS << "\n";
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void SampleRecord::dump() const { print(dbgs(), 0); }
#endif
raw_ostream &llvm::sampleprof::operator<<(raw_ostream &OS,
const SampleRecord &Sample) {
Sample.print(OS, 0);
return OS;
}
/// Print the samples collected for a function on stream \p OS.
void FunctionSamples::print(raw_ostream &OS, unsigned Indent) const {
OS << TotalSamples << ", " << TotalHeadSamples << ", " << BodySamples.size()
<< " sampled lines\n";
OS.indent(Indent);
if (!BodySamples.empty()) {
OS << "Samples collected in the function's body {\n";
SampleSorter<LineLocation, SampleRecord> SortedBodySamples(BodySamples);
for (const auto &SI : SortedBodySamples.get()) {
OS.indent(Indent + 2);
OS << SI->first << ": " << SI->second;
}
OS.indent(Indent);
OS << "}\n";
} else {
OS << "No samples collected in the function's body\n";
}
OS.indent(Indent);
if (!CallsiteSamples.empty()) {
OS << "Samples collected in inlined callsites {\n";
SampleSorter<LineLocation, FunctionSamplesMap> SortedCallsiteSamples(
CallsiteSamples);
for (const auto &CS : SortedCallsiteSamples.get()) {
for (const auto &FS : CS->second) {
OS.indent(Indent + 2);
OS << CS->first << ": inlined callee: " << FS.second.getName() << ": ";
FS.second.print(OS, Indent + 4);
}
}
OS << "}\n";
} else {
OS << "No inlined callsites in this function\n";
}
}
raw_ostream &llvm::sampleprof::operator<<(raw_ostream &OS,
const FunctionSamples &FS) {
FS.print(OS);
return OS;
}
unsigned FunctionSamples::getOffset(const DILocation *DIL) {
return (DIL->getLine() - DIL->getScope()->getSubprogram()->getLine()) &
0xffff;
}
const FunctionSamples *
FunctionSamples::findFunctionSamples(const DILocation *DIL) const {
assert(DIL);
SmallVector<std::pair<LineLocation, StringRef>, 10> S;
const DILocation *PrevDIL = DIL;
for (DIL = DIL->getInlinedAt(); DIL; DIL = DIL->getInlinedAt()) {
S.push_back(std::make_pair(
LineLocation(getOffset(DIL), DIL->getBaseDiscriminator()),
PrevDIL->getScope()->getSubprogram()->getLinkageName()));
PrevDIL = DIL;
}
if (S.size() == 0)
return this;
const FunctionSamples *FS = this;
for (int i = S.size() - 1; i >= 0 && FS != nullptr; i--) {
FS = FS->findFunctionSamplesAt(S[i].first, S[i].second);
}
return FS;
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void FunctionSamples::dump() const { print(dbgs(), 0); }
#endif
|
