1 //===- YAMLRemarkParser.cpp -----------------------------------------------===//
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 //===----------------------------------------------------------------------===//
9 // This file provides utility methods used by clients that want to use the
10 // parser for remark diagnostics in LLVM.
12 //===----------------------------------------------------------------------===//
14 #include "YAMLRemarkParser.h"
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/Remarks/RemarkParser.h"
19 using namespace llvm::remarks;
21 char YAMLParseError::ID = 0;
23 static void handleDiagnostic(const SMDiagnostic &Diag, void *Ctx) {
24 assert(Ctx && "Expected non-null Ctx in diagnostic handler.");
25 std::string &Message = *static_cast<std::string *>(Ctx);
26 assert(Message.empty() && "Expected an empty string.");
27 raw_string_ostream OS(Message);
28 Diag.print(/*ProgName=*/nullptr, OS, /*ShowColors*/ false,
29 /*ShowKindLabels*/ true);
34 YAMLParseError::YAMLParseError(StringRef Msg, SourceMgr &SM,
35 yaml::Stream &Stream, yaml::Node &Node) {
36 // 1) Set up a diagnostic handler to avoid errors being printed out to
38 // 2) Use the stream to print the error with the associated node.
39 // 3) The stream will use the source manager to print the error, which will
40 // call the diagnostic handler.
41 // 4) The diagnostic handler will stream the error directly into this object's
42 // Message member, which is used when logging is asked for.
43 auto OldDiagHandler = SM.getDiagHandler();
44 auto OldDiagCtx = SM.getDiagContext();
45 SM.setDiagHandler(handleDiagnostic, &Message);
46 Stream.printError(&Node, Twine(Msg) + Twine('\n'));
47 // Restore the old handlers.
48 SM.setDiagHandler(OldDiagHandler, OldDiagCtx);
51 static SourceMgr setupSM(std::string &LastErrorMessage) {
53 SM.setDiagHandler(handleDiagnostic, &LastErrorMessage);
57 YAMLRemarkParser::YAMLRemarkParser(StringRef Buf,
58 Optional<const ParsedStringTable *> StrTab)
59 : Parser{Format::YAML}, StrTab(StrTab), LastErrorMessage(),
60 SM(setupSM(LastErrorMessage)), Stream(Buf, SM), YAMLIt(Stream.begin()) {}
62 Error YAMLRemarkParser::error(StringRef Message, yaml::Node &Node) {
63 return make_error<YAMLParseError>(Message, SM, Stream, Node);
66 Error YAMLRemarkParser::error() {
67 if (LastErrorMessage.empty())
68 return Error::success();
69 Error E = make_error<YAMLParseError>(LastErrorMessage);
70 LastErrorMessage.clear();
74 Expected<std::unique_ptr<Remark>>
75 YAMLRemarkParser::parseRemark(yaml::Document &RemarkEntry) {
76 if (Error E = error())
79 yaml::Node *YAMLRoot = RemarkEntry.getRoot();
81 return createStringError(std::make_error_code(std::errc::invalid_argument),
82 "not a valid YAML file.");
85 auto *Root = dyn_cast<yaml::MappingNode>(YAMLRoot);
87 return error("document root is not of mapping type.", *YAMLRoot);
89 std::unique_ptr<Remark> Result = llvm::make_unique<Remark>();
90 Remark &TheRemark = *Result;
92 // First, the type. It needs special handling since is not part of the
94 Expected<Type> T = parseType(*Root);
98 TheRemark.RemarkType = *T;
100 // Then, parse the fields, one by one.
101 for (yaml::KeyValueNode &RemarkField : *Root) {
102 Expected<StringRef> MaybeKey = parseKey(RemarkField);
104 return MaybeKey.takeError();
105 StringRef KeyName = *MaybeKey;
107 if (KeyName == "Pass") {
108 if (Expected<StringRef> MaybeStr = parseStr(RemarkField))
109 TheRemark.PassName = *MaybeStr;
111 return MaybeStr.takeError();
112 } else if (KeyName == "Name") {
113 if (Expected<StringRef> MaybeStr = parseStr(RemarkField))
114 TheRemark.RemarkName = *MaybeStr;
116 return MaybeStr.takeError();
117 } else if (KeyName == "Function") {
118 if (Expected<StringRef> MaybeStr = parseStr(RemarkField))
119 TheRemark.FunctionName = *MaybeStr;
121 return MaybeStr.takeError();
122 } else if (KeyName == "Hotness") {
123 if (Expected<unsigned> MaybeU = parseUnsigned(RemarkField))
124 TheRemark.Hotness = *MaybeU;
126 return MaybeU.takeError();
127 } else if (KeyName == "DebugLoc") {
128 if (Expected<RemarkLocation> MaybeLoc = parseDebugLoc(RemarkField))
129 TheRemark.Loc = *MaybeLoc;
131 return MaybeLoc.takeError();
132 } else if (KeyName == "Args") {
133 auto *Args = dyn_cast<yaml::SequenceNode>(RemarkField.getValue());
135 return error("wrong value type for key.", RemarkField);
137 for (yaml::Node &Arg : *Args) {
138 if (Expected<Argument> MaybeArg = parseArg(Arg))
139 TheRemark.Args.push_back(*MaybeArg);
141 return MaybeArg.takeError();
144 return error("unknown key.", RemarkField);
148 // Check if any of the mandatory fields are missing.
149 if (TheRemark.RemarkType == Type::Unknown || TheRemark.PassName.empty() ||
150 TheRemark.RemarkName.empty() || TheRemark.FunctionName.empty())
151 return error("Type, Pass, Name or Function missing.",
152 *RemarkEntry.getRoot());
154 return std::move(Result);
157 Expected<Type> YAMLRemarkParser::parseType(yaml::MappingNode &Node) {
158 auto Type = StringSwitch<remarks::Type>(Node.getRawTag())
159 .Case("!Passed", remarks::Type::Passed)
160 .Case("!Missed", remarks::Type::Missed)
161 .Case("!Analysis", remarks::Type::Analysis)
162 .Case("!AnalysisFPCommute", remarks::Type::AnalysisFPCommute)
163 .Case("!AnalysisAliasing", remarks::Type::AnalysisAliasing)
164 .Case("!Failure", remarks::Type::Failure)
165 .Default(remarks::Type::Unknown);
166 if (Type == remarks::Type::Unknown)
167 return error("expected a remark tag.", Node);
171 Expected<StringRef> YAMLRemarkParser::parseKey(yaml::KeyValueNode &Node) {
172 if (auto *Key = dyn_cast<yaml::ScalarNode>(Node.getKey()))
173 return Key->getRawValue();
175 return error("key is not a string.", Node);
178 Expected<StringRef> YAMLRemarkParser::parseStr(yaml::KeyValueNode &Node) {
179 auto *Value = dyn_cast<yaml::ScalarNode>(Node.getValue());
181 return error("expected a value of scalar type.", Node);
184 Result = Value->getRawValue();
186 // If we have a string table, parse it as an unsigned.
188 if (Expected<unsigned> MaybeStrID = parseUnsigned(Node))
191 return MaybeStrID.takeError();
193 if (Expected<StringRef> Str = (**StrTab)[StrID])
196 return Str.takeError();
199 if (Result.front() == '\'')
200 Result = Result.drop_front();
202 if (Result.back() == '\'')
203 Result = Result.drop_back();
208 Expected<unsigned> YAMLRemarkParser::parseUnsigned(yaml::KeyValueNode &Node) {
209 SmallVector<char, 4> Tmp;
210 auto *Value = dyn_cast<yaml::ScalarNode>(Node.getValue());
212 return error("expected a value of scalar type.", Node);
213 unsigned UnsignedValue = 0;
214 if (Value->getValue(Tmp).getAsInteger(10, UnsignedValue))
215 return error("expected a value of integer type.", *Value);
216 return UnsignedValue;
219 Expected<RemarkLocation>
220 YAMLRemarkParser::parseDebugLoc(yaml::KeyValueNode &Node) {
221 auto *DebugLoc = dyn_cast<yaml::MappingNode>(Node.getValue());
223 return error("expected a value of mapping type.", Node);
225 Optional<StringRef> File;
226 Optional<unsigned> Line;
227 Optional<unsigned> Column;
229 for (yaml::KeyValueNode &DLNode : *DebugLoc) {
230 Expected<StringRef> MaybeKey = parseKey(DLNode);
232 return MaybeKey.takeError();
233 StringRef KeyName = *MaybeKey;
235 if (KeyName == "File") {
236 if (Expected<StringRef> MaybeStr = parseStr(DLNode))
239 return MaybeStr.takeError();
240 } else if (KeyName == "Column") {
241 if (Expected<unsigned> MaybeU = parseUnsigned(DLNode))
244 return MaybeU.takeError();
245 } else if (KeyName == "Line") {
246 if (Expected<unsigned> MaybeU = parseUnsigned(DLNode))
249 return MaybeU.takeError();
251 return error("unknown entry in DebugLoc map.", DLNode);
255 // If any of the debug loc fields is missing, return an error.
256 if (!File || !Line || !Column)
257 return error("DebugLoc node incomplete.", Node);
259 return RemarkLocation{*File, *Line, *Column};
262 Expected<Argument> YAMLRemarkParser::parseArg(yaml::Node &Node) {
263 auto *ArgMap = dyn_cast<yaml::MappingNode>(&Node);
265 return error("expected a value of mapping type.", Node);
267 Optional<StringRef> KeyStr;
268 Optional<StringRef> ValueStr;
269 Optional<RemarkLocation> Loc;
271 for (yaml::KeyValueNode &ArgEntry : *ArgMap) {
272 Expected<StringRef> MaybeKey = parseKey(ArgEntry);
274 return MaybeKey.takeError();
275 StringRef KeyName = *MaybeKey;
277 // Try to parse debug locs.
278 if (KeyName == "DebugLoc") {
279 // Can't have multiple DebugLoc entries per argument.
281 return error("only one DebugLoc entry is allowed per argument.",
284 if (Expected<RemarkLocation> MaybeLoc = parseDebugLoc(ArgEntry)) {
288 return MaybeLoc.takeError();
291 // If we already have a string, error out.
293 return error("only one string entry is allowed per argument.", ArgEntry);
295 // Try to parse the value.
296 if (Expected<StringRef> MaybeStr = parseStr(ArgEntry))
297 ValueStr = *MaybeStr;
299 return MaybeStr.takeError();
301 // Keep the key from the string.
306 return error("argument key is missing.", *ArgMap);
308 return error("argument value is missing.", *ArgMap);
310 return Argument{*KeyStr, *ValueStr, Loc};
313 Expected<std::unique_ptr<Remark>> YAMLRemarkParser::next() {
314 if (YAMLIt == Stream.end())
315 return make_error<EndOfFileError>();
317 Expected<std::unique_ptr<Remark>> MaybeResult = parseRemark(*YAMLIt);
319 // Avoid garbage input, set the iterator to the end.
320 YAMLIt = Stream.end();
321 return MaybeResult.takeError();
326 return std::move(*MaybeResult);