1 //===---- VerifyDiagnosticConsumer.cpp - Verifying Diagnostic Client ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is a concrete diagnostic client, which buffers the diagnostic messages.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Frontend/VerifyDiagnosticConsumer.h"
15 #include "clang/Basic/CharInfo.h"
16 #include "clang/Basic/FileManager.h"
17 #include "clang/Frontend/FrontendDiagnostic.h"
18 #include "clang/Frontend/TextDiagnosticBuffer.h"
19 #include "clang/Lex/HeaderSearch.h"
20 #include "clang/Lex/Preprocessor.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/Support/Regex.h"
23 #include "llvm/Support/raw_ostream.h"
25 using namespace clang;
26 typedef VerifyDiagnosticConsumer::Directive Directive;
27 typedef VerifyDiagnosticConsumer::DirectiveList DirectiveList;
28 typedef VerifyDiagnosticConsumer::ExpectedData ExpectedData;
30 VerifyDiagnosticConsumer::VerifyDiagnosticConsumer(DiagnosticsEngine &Diags_)
32 PrimaryClient(Diags.getClient()), PrimaryClientOwner(Diags.takeClient()),
33 Buffer(new TextDiagnosticBuffer()), CurrentPreprocessor(nullptr),
34 LangOpts(nullptr), SrcManager(nullptr), ActiveSourceFiles(0),
35 Status(HasNoDirectives)
37 if (Diags.hasSourceManager())
38 setSourceManager(Diags.getSourceManager());
41 VerifyDiagnosticConsumer::~VerifyDiagnosticConsumer() {
42 assert(!ActiveSourceFiles && "Incomplete parsing of source files!");
43 assert(!CurrentPreprocessor && "CurrentPreprocessor should be invalid!");
46 Diags.takeClient().release();
51 class VerifyFileTracker : public PPCallbacks {
52 VerifyDiagnosticConsumer &Verify;
56 VerifyFileTracker(VerifyDiagnosticConsumer &Verify, SourceManager &SM)
57 : Verify(Verify), SM(SM) { }
59 /// \brief Hook into the preprocessor and update the list of parsed
60 /// files when the preprocessor indicates a new file is entered.
61 void FileChanged(SourceLocation Loc, FileChangeReason Reason,
62 SrcMgr::CharacteristicKind FileType,
63 FileID PrevFID) override {
64 Verify.UpdateParsedFileStatus(SM, SM.getFileID(Loc),
65 VerifyDiagnosticConsumer::IsParsed);
68 } // End anonymous namespace.
71 // DiagnosticConsumer interface.
73 void VerifyDiagnosticConsumer::BeginSourceFile(const LangOptions &LangOpts,
74 const Preprocessor *PP) {
75 // Attach comment handler on first invocation.
76 if (++ActiveSourceFiles == 1) {
78 CurrentPreprocessor = PP;
79 this->LangOpts = &LangOpts;
80 setSourceManager(PP->getSourceManager());
81 const_cast<Preprocessor*>(PP)->addCommentHandler(this);
83 // Debug build tracks parsed files.
84 const_cast<Preprocessor*>(PP)->addPPCallbacks(
85 llvm::make_unique<VerifyFileTracker>(*this, *SrcManager));
90 assert((!PP || CurrentPreprocessor == PP) && "Preprocessor changed!");
91 PrimaryClient->BeginSourceFile(LangOpts, PP);
94 void VerifyDiagnosticConsumer::EndSourceFile() {
95 assert(ActiveSourceFiles && "No active source files!");
96 PrimaryClient->EndSourceFile();
98 // Detach comment handler once last active source file completed.
99 if (--ActiveSourceFiles == 0) {
100 if (CurrentPreprocessor)
101 const_cast<Preprocessor*>(CurrentPreprocessor)->removeCommentHandler(this);
103 // Check diagnostics once last file completed.
105 CurrentPreprocessor = nullptr;
110 void VerifyDiagnosticConsumer::HandleDiagnostic(
111 DiagnosticsEngine::Level DiagLevel, const Diagnostic &Info) {
112 if (Info.hasSourceManager()) {
113 // If this diagnostic is for a different source manager, ignore it.
114 if (SrcManager && &Info.getSourceManager() != SrcManager)
117 setSourceManager(Info.getSourceManager());
121 // Debug build tracks unparsed files for possible
122 // unparsed expected-* directives.
124 SourceLocation Loc = Info.getLocation();
126 ParsedStatus PS = IsUnparsed;
128 Loc = SrcManager->getExpansionLoc(Loc);
129 FileID FID = SrcManager->getFileID(Loc);
131 const FileEntry *FE = SrcManager->getFileEntryForID(FID);
132 if (FE && CurrentPreprocessor && SrcManager->isLoadedFileID(FID)) {
133 // If the file is a modules header file it shall not be parsed
134 // for expected-* directives.
135 HeaderSearch &HS = CurrentPreprocessor->getHeaderSearchInfo();
136 if (HS.findModuleForHeader(FE))
137 PS = IsUnparsedNoDirectives;
140 UpdateParsedFileStatus(*SrcManager, FID, PS);
145 // Send the diagnostic to the buffer, we will check it once we reach the end
146 // of the source file (or are destructed).
147 Buffer->HandleDiagnostic(DiagLevel, Info);
150 //===----------------------------------------------------------------------===//
151 // Checking diagnostics implementation.
152 //===----------------------------------------------------------------------===//
154 typedef TextDiagnosticBuffer::DiagList DiagList;
155 typedef TextDiagnosticBuffer::const_iterator const_diag_iterator;
159 /// StandardDirective - Directive with string matching.
161 class StandardDirective : public Directive {
163 StandardDirective(SourceLocation DirectiveLoc, SourceLocation DiagnosticLoc,
164 bool MatchAnyLine, StringRef Text, unsigned Min,
166 : Directive(DirectiveLoc, DiagnosticLoc, MatchAnyLine, Text, Min, Max) { }
168 bool isValid(std::string &Error) override {
169 // all strings are considered valid; even empty ones
173 bool match(StringRef S) override {
174 return S.find(Text) != StringRef::npos;
178 /// RegexDirective - Directive with regular-expression matching.
180 class RegexDirective : public Directive {
182 RegexDirective(SourceLocation DirectiveLoc, SourceLocation DiagnosticLoc,
183 bool MatchAnyLine, StringRef Text, unsigned Min, unsigned Max,
185 : Directive(DirectiveLoc, DiagnosticLoc, MatchAnyLine, Text, Min, Max),
188 bool isValid(std::string &Error) override {
189 if (Regex.isValid(Error))
194 bool match(StringRef S) override {
195 return Regex.match(S);
205 ParseHelper(StringRef S)
206 : Begin(S.begin()), End(S.end()), C(Begin), P(Begin), PEnd(nullptr) {}
208 // Return true if string literal is next.
209 bool Next(StringRef S) {
214 return !memcmp(P, S.data(), S.size());
217 // Return true if number is next.
218 // Output N only if number is next.
219 bool Next(unsigned &N) {
222 for (; P < End && P[0] >= '0' && P[0] <= '9'; ++P) {
233 // Return true if string literal is found.
234 // When true, P marks begin-position of S in content.
235 bool Search(StringRef S, bool EnsureStartOfWord = false) {
237 P = std::search(C, End, S.begin(), S.end());
241 if (!EnsureStartOfWord
242 // Check if string literal starts a new word.
243 || P == Begin || isWhitespace(P[-1])
244 // Or it could be preceded by the start of a comment.
245 || (P > (Begin + 1) && (P[-1] == '/' || P[-1] == '*')
248 // Otherwise, skip and search again.
253 // Return true if a CloseBrace that closes the OpenBrace at the current nest
254 // level is found. When true, P marks begin-position of CloseBrace.
255 bool SearchClosingBrace(StringRef OpenBrace, StringRef CloseBrace) {
259 StringRef S(P, End - P);
260 if (S.startswith(OpenBrace)) {
262 P += OpenBrace.size();
263 } else if (S.startswith(CloseBrace)) {
266 PEnd = P + CloseBrace.size();
269 P += CloseBrace.size();
277 // Advance 1-past previous next/search.
278 // Behavior is undefined if previous next/search failed.
284 // Skip zero or more whitespace.
285 void SkipWhitespace() {
286 for (; C < End && isWhitespace(*C); ++C)
290 // Return true if EOF reached.
295 const char * const Begin; // beginning of expected content
296 const char * const End; // end of expected content (1-past)
297 const char *C; // position of next char in content
301 const char *PEnd; // previous next/search subject end (1-past)
304 } // namespace anonymous
306 /// ParseDirective - Go through the comment and see if it indicates expected
307 /// diagnostics. If so, then put them in the appropriate directive list.
309 /// Returns true if any valid directives were found.
310 static bool ParseDirective(StringRef S, ExpectedData *ED, SourceManager &SM,
311 Preprocessor *PP, SourceLocation Pos,
312 VerifyDiagnosticConsumer::DirectiveStatus &Status) {
313 DiagnosticsEngine &Diags = PP ? PP->getDiagnostics() : SM.getDiagnostics();
315 // A single comment may contain multiple directives.
316 bool FoundDirective = false;
317 for (ParseHelper PH(S); !PH.Done();) {
318 // Search for token: expected
319 if (!PH.Search("expected", true))
328 // Next token: { error | warning | note }
329 DirectiveList *DL = nullptr;
330 if (PH.Next("error"))
331 DL = ED ? &ED->Errors : nullptr;
332 else if (PH.Next("warning"))
333 DL = ED ? &ED->Warnings : nullptr;
334 else if (PH.Next("remark"))
335 DL = ED ? &ED->Remarks : nullptr;
336 else if (PH.Next("note"))
337 DL = ED ? &ED->Notes : nullptr;
338 else if (PH.Next("no-diagnostics")) {
339 if (Status == VerifyDiagnosticConsumer::HasOtherExpectedDirectives)
340 Diags.Report(Pos, diag::err_verify_invalid_no_diags)
341 << /*IsExpectedNoDiagnostics=*/true;
343 Status = VerifyDiagnosticConsumer::HasExpectedNoDiagnostics;
349 if (Status == VerifyDiagnosticConsumer::HasExpectedNoDiagnostics) {
350 Diags.Report(Pos, diag::err_verify_invalid_no_diags)
351 << /*IsExpectedNoDiagnostics=*/false;
354 Status = VerifyDiagnosticConsumer::HasOtherExpectedDirectives;
356 // If a directive has been found but we're not interested
357 // in storing the directive information, return now.
361 // Default directive kind.
362 bool RegexKind = false;
363 const char* KindStr = "string";
365 // Next optional token: -
366 if (PH.Next("-re")) {
372 // Next optional token: @
373 SourceLocation ExpectedLoc;
374 bool MatchAnyLine = false;
380 bool FoundPlus = PH.Next("+");
381 if (FoundPlus || PH.Next("-")) {
382 // Relative to current line.
384 bool Invalid = false;
385 unsigned ExpectedLine = SM.getSpellingLineNumber(Pos, &Invalid);
386 if (!Invalid && PH.Next(Line) && (FoundPlus || Line < ExpectedLine)) {
387 if (FoundPlus) ExpectedLine += Line;
388 else ExpectedLine -= Line;
389 ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), ExpectedLine, 1);
391 } else if (PH.Next(Line)) {
392 // Absolute line number.
394 ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), Line, 1);
395 } else if (PP && PH.Search(":")) {
396 // Specific source file.
397 StringRef Filename(PH.C, PH.P-PH.C);
400 // Lookup file via Preprocessor, like a #include.
401 const DirectoryLookup *CurDir;
402 const FileEntry *FE =
403 PP->LookupFile(Pos, Filename, false, nullptr, nullptr, CurDir,
404 nullptr, nullptr, nullptr);
406 Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
407 diag::err_verify_missing_file) << Filename << KindStr;
411 if (SM.translateFile(FE).isInvalid())
412 SM.createFileID(FE, Pos, SrcMgr::C_User);
414 if (PH.Next(Line) && Line > 0)
415 ExpectedLoc = SM.translateFileLineCol(FE, Line, 1);
416 else if (PH.Next("*")) {
418 ExpectedLoc = SM.translateFileLineCol(FE, 1, 1);
422 if (ExpectedLoc.isInvalid()) {
423 Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
424 diag::err_verify_missing_line) << KindStr;
430 // Skip optional whitespace.
433 // Next optional token: positive integer or a '+'.
438 // A positive integer can be followed by a '+' meaning min
439 // or more, or by a '-' meaning a range from min to max.
441 Max = Directive::MaxCount;
443 } else if (PH.Next("-")) {
445 if (!PH.Next(Max) || Max < Min) {
446 Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
447 diag::err_verify_invalid_range) << KindStr;
454 } else if (PH.Next("+")) {
455 // '+' on its own means "1 or more".
456 Max = Directive::MaxCount;
460 // Skip optional whitespace.
464 if (!PH.Next("{{")) {
465 Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
466 diag::err_verify_missing_start) << KindStr;
470 const char* const ContentBegin = PH.C; // mark content begin
472 // Search for token: }}
473 if (!PH.SearchClosingBrace("{{", "}}")) {
474 Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
475 diag::err_verify_missing_end) << KindStr;
478 const char* const ContentEnd = PH.P; // mark content end
481 // Build directive text; convert \n to newlines.
483 StringRef NewlineStr = "\\n";
484 StringRef Content(ContentBegin, ContentEnd-ContentBegin);
487 while ((FPos = Content.find(NewlineStr, CPos)) != StringRef::npos) {
488 Text += Content.substr(CPos, FPos-CPos);
490 CPos = FPos + NewlineStr.size();
493 Text.assign(ContentBegin, ContentEnd);
495 // Check that regex directives contain at least one regex.
496 if (RegexKind && Text.find("{{") == StringRef::npos) {
497 Diags.Report(Pos.getLocWithOffset(ContentBegin-PH.Begin),
498 diag::err_verify_missing_regex) << Text;
502 // Construct new directive.
503 std::unique_ptr<Directive> D = Directive::create(
504 RegexKind, Pos, ExpectedLoc, MatchAnyLine, Text, Min, Max);
507 if (D->isValid(Error)) {
508 DL->push_back(std::move(D));
509 FoundDirective = true;
511 Diags.Report(Pos.getLocWithOffset(ContentBegin-PH.Begin),
512 diag::err_verify_invalid_content)
517 return FoundDirective;
520 /// HandleComment - Hook into the preprocessor and extract comments containing
521 /// expected errors and warnings.
522 bool VerifyDiagnosticConsumer::HandleComment(Preprocessor &PP,
523 SourceRange Comment) {
524 SourceManager &SM = PP.getSourceManager();
526 // If this comment is for a different source manager, ignore it.
527 if (SrcManager && &SM != SrcManager)
530 SourceLocation CommentBegin = Comment.getBegin();
532 const char *CommentRaw = SM.getCharacterData(CommentBegin);
533 StringRef C(CommentRaw, SM.getCharacterData(Comment.getEnd()) - CommentRaw);
538 // Fold any "\<EOL>" sequences
539 size_t loc = C.find('\\');
540 if (loc == StringRef::npos) {
541 ParseDirective(C, &ED, SM, &PP, CommentBegin, Status);
546 C2.reserve(C.size());
548 for (size_t last = 0;; loc = C.find('\\', last)) {
549 if (loc == StringRef::npos || loc == C.size()) {
550 C2 += C.substr(last);
553 C2 += C.substr(last, loc-last);
556 if (C[last] == '\n' || C[last] == '\r') {
559 // Escape \r\n or \n\r, but not \n\n.
561 if (C[last] == '\n' || C[last] == '\r')
562 if (C[last] != C[last-1])
565 // This was just a normal backslash.
571 ParseDirective(C2, &ED, SM, &PP, CommentBegin, Status);
576 /// \brief Lex the specified source file to determine whether it contains
577 /// any expected-* directives. As a Lexer is used rather than a full-blown
578 /// Preprocessor, directives inside skipped #if blocks will still be found.
580 /// \return true if any directives were found.
581 static bool findDirectives(SourceManager &SM, FileID FID,
582 const LangOptions &LangOpts) {
583 // Create a raw lexer to pull all the comments out of FID.
587 // Create a lexer to lex all the tokens of the main file in raw mode.
588 const llvm::MemoryBuffer *FromFile = SM.getBuffer(FID);
589 Lexer RawLex(FID, FromFile, SM, LangOpts);
591 // Return comments as tokens, this is how we find expected diagnostics.
592 RawLex.SetCommentRetentionState(true);
595 Tok.setKind(tok::comment);
596 VerifyDiagnosticConsumer::DirectiveStatus Status =
597 VerifyDiagnosticConsumer::HasNoDirectives;
598 while (Tok.isNot(tok::eof)) {
599 RawLex.LexFromRawLexer(Tok);
600 if (!Tok.is(tok::comment)) continue;
602 std::string Comment = RawLex.getSpelling(Tok, SM, LangOpts);
603 if (Comment.empty()) continue;
605 // Find first directive.
606 if (ParseDirective(Comment, nullptr, SM, nullptr, Tok.getLocation(),
614 /// \brief Takes a list of diagnostics that have been generated but not matched
615 /// by an expected-* directive and produces a diagnostic to the user from this.
616 static unsigned PrintUnexpected(DiagnosticsEngine &Diags, SourceManager *SourceMgr,
617 const_diag_iterator diag_begin,
618 const_diag_iterator diag_end,
620 if (diag_begin == diag_end) return 0;
622 SmallString<256> Fmt;
623 llvm::raw_svector_ostream OS(Fmt);
624 for (const_diag_iterator I = diag_begin, E = diag_end; I != E; ++I) {
625 if (I->first.isInvalid() || !SourceMgr)
626 OS << "\n (frontend)";
629 if (const FileEntry *File = SourceMgr->getFileEntryForID(
630 SourceMgr->getFileID(I->first)))
631 OS << " File " << File->getName();
632 OS << " Line " << SourceMgr->getPresumedLineNumber(I->first);
634 OS << ": " << I->second;
637 Diags.Report(diag::err_verify_inconsistent_diags).setForceEmit()
638 << Kind << /*Unexpected=*/true << OS.str();
639 return std::distance(diag_begin, diag_end);
642 /// \brief Takes a list of diagnostics that were expected to have been generated
643 /// but were not and produces a diagnostic to the user from this.
644 static unsigned PrintExpected(DiagnosticsEngine &Diags,
645 SourceManager &SourceMgr,
646 std::vector<Directive *> &DL, const char *Kind) {
650 SmallString<256> Fmt;
651 llvm::raw_svector_ostream OS(Fmt);
652 for (auto *DirPtr : DL) {
653 Directive &D = *DirPtr;
654 OS << "\n File " << SourceMgr.getFilename(D.DiagnosticLoc);
658 OS << " Line " << SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
659 if (D.DirectiveLoc != D.DiagnosticLoc)
660 OS << " (directive at "
661 << SourceMgr.getFilename(D.DirectiveLoc) << ':'
662 << SourceMgr.getPresumedLineNumber(D.DirectiveLoc) << ')';
663 OS << ": " << D.Text;
666 Diags.Report(diag::err_verify_inconsistent_diags).setForceEmit()
667 << Kind << /*Unexpected=*/false << OS.str();
671 /// \brief Determine whether two source locations come from the same file.
672 static bool IsFromSameFile(SourceManager &SM, SourceLocation DirectiveLoc,
673 SourceLocation DiagnosticLoc) {
674 while (DiagnosticLoc.isMacroID())
675 DiagnosticLoc = SM.getImmediateMacroCallerLoc(DiagnosticLoc);
677 if (SM.isWrittenInSameFile(DirectiveLoc, DiagnosticLoc))
680 const FileEntry *DiagFile = SM.getFileEntryForID(SM.getFileID(DiagnosticLoc));
681 if (!DiagFile && SM.isWrittenInMainFile(DirectiveLoc))
684 return (DiagFile == SM.getFileEntryForID(SM.getFileID(DirectiveLoc)));
687 /// CheckLists - Compare expected to seen diagnostic lists and return the
688 /// the difference between them.
690 static unsigned CheckLists(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
693 const_diag_iterator d2_begin,
694 const_diag_iterator d2_end) {
695 std::vector<Directive *> LeftOnly;
696 DiagList Right(d2_begin, d2_end);
698 for (auto &Owner : Left) {
699 Directive &D = *Owner;
700 unsigned LineNo1 = SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
702 for (unsigned i = 0; i < D.Max; ++i) {
703 DiagList::iterator II, IE;
704 for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
705 if (!D.MatchAnyLine) {
706 unsigned LineNo2 = SourceMgr.getPresumedLineNumber(II->first);
707 if (LineNo1 != LineNo2)
711 if (!IsFromSameFile(SourceMgr, D.DiagnosticLoc, II->first))
714 const std::string &RightText = II->second;
715 if (D.match(RightText))
720 if (i >= D.Min) break;
721 LeftOnly.push_back(&D);
723 // Found. The same cannot be found twice.
728 // Now all that's left in Right are those that were not matched.
729 unsigned num = PrintExpected(Diags, SourceMgr, LeftOnly, Label);
730 num += PrintUnexpected(Diags, &SourceMgr, Right.begin(), Right.end(), Label);
734 /// CheckResults - This compares the expected results to those that
735 /// were actually reported. It emits any discrepencies. Return "true" if there
736 /// were problems. Return "false" otherwise.
738 static unsigned CheckResults(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
739 const TextDiagnosticBuffer &Buffer,
741 // We want to capture the delta between what was expected and what was
744 // Expected \ Seen - set expected but not seen
745 // Seen \ Expected - set seen but not expected
746 unsigned NumProblems = 0;
748 // See if there are error mismatches.
749 NumProblems += CheckLists(Diags, SourceMgr, "error", ED.Errors,
750 Buffer.err_begin(), Buffer.err_end());
752 // See if there are warning mismatches.
753 NumProblems += CheckLists(Diags, SourceMgr, "warning", ED.Warnings,
754 Buffer.warn_begin(), Buffer.warn_end());
756 // See if there are remark mismatches.
757 NumProblems += CheckLists(Diags, SourceMgr, "remark", ED.Remarks,
758 Buffer.remark_begin(), Buffer.remark_end());
760 // See if there are note mismatches.
761 NumProblems += CheckLists(Diags, SourceMgr, "note", ED.Notes,
762 Buffer.note_begin(), Buffer.note_end());
767 void VerifyDiagnosticConsumer::UpdateParsedFileStatus(SourceManager &SM,
770 // Check SourceManager hasn't changed.
771 setSourceManager(SM);
777 const FileEntry *FE = SM.getFileEntryForID(FID);
779 if (PS == IsParsed) {
780 // Move the FileID from the unparsed set to the parsed set.
781 UnparsedFiles.erase(FID);
782 ParsedFiles.insert(std::make_pair(FID, FE));
783 } else if (!ParsedFiles.count(FID) && !UnparsedFiles.count(FID)) {
784 // Add the FileID to the unparsed set if we haven't seen it before.
786 // Check for directives.
787 bool FoundDirectives;
788 if (PS == IsUnparsedNoDirectives)
789 FoundDirectives = false;
791 FoundDirectives = !LangOpts || findDirectives(SM, FID, *LangOpts);
793 // Add the FileID to the unparsed set.
794 UnparsedFiles.insert(std::make_pair(FID,
795 UnparsedFileStatus(FE, FoundDirectives)));
800 void VerifyDiagnosticConsumer::CheckDiagnostics() {
801 // Ensure any diagnostics go to the primary client.
802 DiagnosticConsumer *CurClient = Diags.getClient();
803 std::unique_ptr<DiagnosticConsumer> Owner = Diags.takeClient();
804 Diags.setClient(PrimaryClient, false);
807 // In a debug build, scan through any files that may have been missed
808 // during parsing and issue a fatal error if directives are contained
809 // within these files. If a fatal error occurs, this suggests that
810 // this file is being parsed separately from the main file, in which
811 // case consider moving the directives to the correct place, if this
813 if (UnparsedFiles.size() > 0) {
814 // Generate a cache of parsed FileEntry pointers for alias lookups.
815 llvm::SmallPtrSet<const FileEntry *, 8> ParsedFileCache;
816 for (ParsedFilesMap::iterator I = ParsedFiles.begin(),
817 End = ParsedFiles.end(); I != End; ++I) {
818 if (const FileEntry *FE = I->second)
819 ParsedFileCache.insert(FE);
822 // Iterate through list of unparsed files.
823 for (UnparsedFilesMap::iterator I = UnparsedFiles.begin(),
824 End = UnparsedFiles.end(); I != End; ++I) {
825 const UnparsedFileStatus &Status = I->second;
826 const FileEntry *FE = Status.getFile();
828 // Skip files that have been parsed via an alias.
829 if (FE && ParsedFileCache.count(FE))
832 // Report a fatal error if this file contained directives.
833 if (Status.foundDirectives()) {
834 llvm::report_fatal_error(Twine("-verify directives found after rather"
835 " than during normal parsing of ",
836 StringRef(FE ? FE->getName() : "(unknown)")));
840 // UnparsedFiles has been processed now, so clear it.
841 UnparsedFiles.clear();
846 // Produce an error if no expected-* directives could be found in the
847 // source file(s) processed.
848 if (Status == HasNoDirectives) {
849 Diags.Report(diag::err_verify_no_directives).setForceEmit();
851 Status = HasNoDirectivesReported;
854 // Check that the expected diagnostics occurred.
855 NumErrors += CheckResults(Diags, *SrcManager, *Buffer, ED);
857 NumErrors += (PrintUnexpected(Diags, nullptr, Buffer->err_begin(),
858 Buffer->err_end(), "error") +
859 PrintUnexpected(Diags, nullptr, Buffer->warn_begin(),
860 Buffer->warn_end(), "warn") +
861 PrintUnexpected(Diags, nullptr, Buffer->note_begin(),
862 Buffer->note_end(), "note"));
865 Diags.setClient(CurClient, Owner.release() != nullptr);
867 // Reset the buffer, we have processed all the diagnostics in it.
868 Buffer.reset(new TextDiagnosticBuffer());
872 std::unique_ptr<Directive> Directive::create(bool RegexKind,
873 SourceLocation DirectiveLoc,
874 SourceLocation DiagnosticLoc,
875 bool MatchAnyLine, StringRef Text,
876 unsigned Min, unsigned Max) {
878 return llvm::make_unique<StandardDirective>(DirectiveLoc, DiagnosticLoc,
879 MatchAnyLine, Text, Min, Max);
881 // Parse the directive into a regular expression.
882 std::string RegexStr;
885 if (S.startswith("{{")) {
887 size_t RegexMatchLength = S.find("}}");
888 assert(RegexMatchLength != StringRef::npos);
889 // Append the regex, enclosed in parentheses.
891 RegexStr.append(S.data(), RegexMatchLength);
893 S = S.drop_front(RegexMatchLength + 2);
895 size_t VerbatimMatchLength = S.find("{{");
896 if (VerbatimMatchLength == StringRef::npos)
897 VerbatimMatchLength = S.size();
898 // Escape and append the fixed string.
899 RegexStr += llvm::Regex::escape(S.substr(0, VerbatimMatchLength));
900 S = S.drop_front(VerbatimMatchLength);
904 return llvm::make_unique<RegexDirective>(
905 DirectiveLoc, DiagnosticLoc, MatchAnyLine, Text, Min, Max, RegexStr);