1//===- YAMLRemarkSerializer.cpp -------------------------------------------===//
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// This file provides the implementation of the YAML remark serializer using
10// LLVM's YAMLTraits.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Remarks/YAMLRemarkSerializer.h"
15#include "llvm/Remarks/Remark.h"
16#include "llvm/Support/FileSystem.h"
17#include <optional>
18
19using namespace llvm;
20using namespace llvm::remarks;
21
22// Use the same keys whether we use a string table or not (respectively, T is an
23// unsigned or a StringRef).
24template <typename T>
25static void mapRemarkHeader(yaml::IO &io, T PassName, T RemarkName,
26 std::optional<RemarkLocation> RL, T FunctionName,
27 std::optional<uint64_t> Hotness,
28 ArrayRef<Argument> Args) {
29 io.mapRequired("Pass", PassName);
30 io.mapRequired("Name", RemarkName);
31 io.mapOptional(Key: "DebugLoc", Val&: RL);
32 io.mapRequired("Function", FunctionName);
33 io.mapOptional(Key: "Hotness", Val&: Hotness);
34 io.mapOptional(Key: "Args", Val&: Args);
35}
36
37namespace llvm {
38namespace yaml {
39
40template <> struct MappingTraits<remarks::Remark *> {
41 static void mapping(IO &io, remarks::Remark *&Remark) {
42 assert(io.outputting() && "input not yet implemented");
43
44 if (io.mapTag(Tag: "!Passed", Default: (Remark->RemarkType == Type::Passed)))
45 ;
46 else if (io.mapTag(Tag: "!Missed", Default: (Remark->RemarkType == Type::Missed)))
47 ;
48 else if (io.mapTag(Tag: "!Analysis", Default: (Remark->RemarkType == Type::Analysis)))
49 ;
50 else if (io.mapTag(Tag: "!AnalysisFPCommute",
51 Default: (Remark->RemarkType == Type::AnalysisFPCommute)))
52 ;
53 else if (io.mapTag(Tag: "!AnalysisAliasing",
54 Default: (Remark->RemarkType == Type::AnalysisAliasing)))
55 ;
56 else if (io.mapTag(Tag: "!Failure", Default: (Remark->RemarkType == Type::Failure)))
57 ;
58 else
59 llvm_unreachable("Unknown remark type");
60
61 if (auto *Serializer = dyn_cast<YAMLStrTabRemarkSerializer>(
62 Val: reinterpret_cast<RemarkSerializer *>(io.getContext()))) {
63 assert(Serializer->StrTab && "YAMLStrTabSerializer with no StrTab.");
64 StringTable &StrTab = *Serializer->StrTab;
65 unsigned PassID = StrTab.add(Str: Remark->PassName).first;
66 unsigned NameID = StrTab.add(Str: Remark->RemarkName).first;
67 unsigned FunctionID = StrTab.add(Str: Remark->FunctionName).first;
68 mapRemarkHeader(io, PassName: PassID, RemarkName: NameID, RL: Remark->Loc, FunctionName: FunctionID,
69 Hotness: Remark->Hotness, Args: Remark->Args);
70 } else {
71 mapRemarkHeader(io, PassName: Remark->PassName, RemarkName: Remark->RemarkName, RL: Remark->Loc,
72 FunctionName: Remark->FunctionName, Hotness: Remark->Hotness, Args: Remark->Args);
73 }
74 }
75};
76
77template <> struct MappingTraits<RemarkLocation> {
78 static void mapping(IO &io, RemarkLocation &RL) {
79 assert(io.outputting() && "input not yet implemented");
80
81 StringRef File = RL.SourceFilePath;
82 unsigned Line = RL.SourceLine;
83 unsigned Col = RL.SourceColumn;
84
85 if (auto *Serializer = dyn_cast<YAMLStrTabRemarkSerializer>(
86 Val: reinterpret_cast<RemarkSerializer *>(io.getContext()))) {
87 assert(Serializer->StrTab && "YAMLStrTabSerializer with no StrTab.");
88 StringTable &StrTab = *Serializer->StrTab;
89 unsigned FileID = StrTab.add(Str: File).first;
90 io.mapRequired(Key: "File", Val&: FileID);
91 } else {
92 io.mapRequired(Key: "File", Val&: File);
93 }
94
95 io.mapRequired(Key: "Line", Val&: Line);
96 io.mapRequired(Key: "Column", Val&: Col);
97 }
98
99 static const bool flow = true;
100};
101
102/// Helper struct for multiline string block literals. Use this type to preserve
103/// newlines in strings.
104struct StringBlockVal {
105 StringRef Value;
106 StringBlockVal(StringRef R) : Value(R) {}
107};
108
109template <> struct BlockScalarTraits<StringBlockVal> {
110 static void output(const StringBlockVal &S, void *Ctx, raw_ostream &OS) {
111 return ScalarTraits<StringRef>::output(S.Value, Ctx, OS);
112 }
113
114 static StringRef input(StringRef Scalar, void *Ctx, StringBlockVal &S) {
115 return ScalarTraits<StringRef>::input(Scalar, Ctx, S.Value);
116 }
117};
118
119/// ArrayRef is not really compatible with the YAMLTraits. Everything should be
120/// immutable in an ArrayRef, while the SequenceTraits expect a mutable version
121/// for inputting, but we're only using the outputting capabilities here.
122/// This is a hack, but still nicer than having to manually call the YAMLIO
123/// internal methods.
124/// Keep this in this file so that it doesn't get misused from YAMLTraits.h.
125template <typename T> struct SequenceTraits<ArrayRef<T>> {
126 static size_t size(IO &io, ArrayRef<T> &seq) { return seq.size(); }
127 static Argument &element(IO &io, ArrayRef<T> &seq, size_t index) {
128 assert(io.outputting() && "input not yet implemented");
129 // The assert above should make this "safer" to satisfy the YAMLTraits.
130 return const_cast<T &>(seq[index]);
131 }
132};
133
134/// Implement this as a mapping for now to get proper quotation for the value.
135template <> struct MappingTraits<Argument> {
136 static void mapping(IO &io, Argument &A) {
137 assert(io.outputting() && "input not yet implemented");
138
139 if (auto *Serializer = dyn_cast<YAMLStrTabRemarkSerializer>(
140 Val: reinterpret_cast<RemarkSerializer *>(io.getContext()))) {
141 assert(Serializer->StrTab && "YAMLStrTabSerializer with no StrTab.");
142 StringTable &StrTab = *Serializer->StrTab;
143 auto ValueID = StrTab.add(Str: A.Val).first;
144 io.mapRequired(Key: A.Key.data(), Val&: ValueID);
145 } else if (StringRef(A.Val).count(C: '\n') > 1) {
146 StringBlockVal S(A.Val);
147 io.mapRequired(Key: A.Key.data(), Val&: S);
148 } else {
149 io.mapRequired(Key: A.Key.data(), Val&: A.Val);
150 }
151 io.mapOptional(Key: "DebugLoc", Val&: A.Loc);
152 }
153};
154
155} // end namespace yaml
156} // end namespace llvm
157
158LLVM_YAML_IS_SEQUENCE_VECTOR(Argument)
159
160YAMLRemarkSerializer::YAMLRemarkSerializer(raw_ostream &OS, SerializerMode Mode,
161 std::optional<StringTable> StrTabIn)
162 : YAMLRemarkSerializer(Format::YAML, OS, Mode, std::move(StrTabIn)) {}
163
164YAMLRemarkSerializer::YAMLRemarkSerializer(Format SerializerFormat,
165 raw_ostream &OS, SerializerMode Mode,
166 std::optional<StringTable> StrTabIn)
167 : RemarkSerializer(SerializerFormat, OS, Mode),
168 YAMLOutput(OS, reinterpret_cast<void *>(this)) {
169 StrTab = std::move(StrTabIn);
170}
171
172void YAMLRemarkSerializer::emit(const Remark &Remark) {
173 // Again, YAMLTraits expect a non-const object for inputting, but we're not
174 // using that here.
175 auto R = const_cast<remarks::Remark *>(&Remark);
176 YAMLOutput << R;
177}
178
179std::unique_ptr<MetaSerializer> YAMLRemarkSerializer::metaSerializer(
180 raw_ostream &OS, std::optional<StringRef> ExternalFilename) {
181 return std::make_unique<YAMLMetaSerializer>(args&: OS, args&: ExternalFilename);
182}
183
184void YAMLStrTabRemarkSerializer::emit(const Remark &Remark) {
185 // In standalone mode, for the serializer with a string table, emit the
186 // metadata first and set DidEmitMeta to avoid emitting it again.
187 if (Mode == SerializerMode::Standalone && !DidEmitMeta) {
188 std::unique_ptr<MetaSerializer> MetaSerializer =
189 metaSerializer(OS, /*ExternalFilename=*/std::nullopt);
190 MetaSerializer->emit();
191 DidEmitMeta = true;
192 }
193
194 // Then do the usual remark emission.
195 YAMLRemarkSerializer::emit(Remark);
196}
197
198std::unique_ptr<MetaSerializer> YAMLStrTabRemarkSerializer::metaSerializer(
199 raw_ostream &OS, std::optional<StringRef> ExternalFilename) {
200 assert(StrTab);
201 return std::make_unique<YAMLStrTabMetaSerializer>(args&: OS, args&: ExternalFilename,
202 args&: *StrTab);
203}
204
205static void emitMagic(raw_ostream &OS) {
206 // Emit the magic number.
207 OS << remarks::Magic;
208 // Explicitly emit a '\0'.
209 OS.write(C: '\0');
210}
211
212static void emitVersion(raw_ostream &OS) {
213 // Emit the version number: little-endian uint64_t.
214 std::array<char, 8> Version;
215 support::endian::write64le(P: Version.data(), V: remarks::CurrentRemarkVersion);
216 OS.write(Ptr: Version.data(), Size: Version.size());
217}
218
219static void emitStrTab(raw_ostream &OS,
220 std::optional<const StringTable *> StrTab) {
221 // Emit the string table in the section.
222 uint64_t StrTabSize = StrTab ? (*StrTab)->SerializedSize : 0;
223 // Emit the total size of the string table (the size itself excluded):
224 // little-endian uint64_t.
225 // Note: even if no string table is used, emit 0.
226 std::array<char, 8> StrTabSizeBuf;
227 support::endian::write64le(P: StrTabSizeBuf.data(), V: StrTabSize);
228 OS.write(Ptr: StrTabSizeBuf.data(), Size: StrTabSizeBuf.size());
229 if (StrTab)
230 (*StrTab)->serialize(OS);
231}
232
233static void emitExternalFile(raw_ostream &OS, StringRef Filename) {
234 // Emit the null-terminated absolute path to the remark file.
235 SmallString<128> FilenameBuf = Filename;
236 sys::fs::make_absolute(path&: FilenameBuf);
237 assert(!FilenameBuf.empty() && "The filename can't be empty.");
238 OS.write(Ptr: FilenameBuf.data(), Size: FilenameBuf.size());
239 OS.write(C: '\0');
240}
241
242void YAMLMetaSerializer::emit() {
243 emitMagic(OS);
244 emitVersion(OS);
245 emitStrTab(OS, StrTab: std::nullopt);
246 if (ExternalFilename)
247 emitExternalFile(OS, Filename: *ExternalFilename);
248}
249
250void YAMLStrTabMetaSerializer::emit() {
251 emitMagic(OS);
252 emitVersion(OS);
253 emitStrTab(OS, StrTab: &StrTab);
254 if (ExternalFilename)
255 emitExternalFile(OS, Filename: *ExternalFilename);
256}
257

source code of llvm/lib/Remarks/YAMLRemarkSerializer.cpp