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diff --git a/clang/lib/Frontend/VerifyDiagnosticConsumer.cpp b/clang/lib/Frontend/VerifyDiagnosticConsumer.cpp
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+//===---- VerifyDiagnosticConsumer.cpp - Verifying Diagnostic Client ------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a concrete diagnostic client, which buffers the diagnostic messages.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/VerifyDiagnosticConsumer.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/TextDiagnosticBuffer.h"
+#include "clang/Lex/Preprocessor.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/Regex.h"
+#include "llvm/Support/raw_ostream.h"
+#include <climits>
+
+using namespace clang;
+
+VerifyDiagnosticConsumer::VerifyDiagnosticConsumer(DiagnosticsEngine &_Diags)
+ : Diags(_Diags), PrimaryClient(Diags.getClient()),
+ OwnsPrimaryClient(Diags.ownsClient()),
+ Buffer(new TextDiagnosticBuffer()), CurrentPreprocessor(0)
+{
+ Diags.takeClient();
+}
+
+VerifyDiagnosticConsumer::~VerifyDiagnosticConsumer() {
+ CheckDiagnostics();
+ Diags.takeClient();
+ if (OwnsPrimaryClient)
+ delete PrimaryClient;
+}
+
+// DiagnosticConsumer interface.
+
+void VerifyDiagnosticConsumer::BeginSourceFile(const LangOptions &LangOpts,
+ const Preprocessor *PP) {
+ // FIXME: Const hack, we screw up the preprocessor but in practice its ok
+ // because it doesn't get reused. It would be better if we could make a copy
+ // though.
+ CurrentPreprocessor = const_cast<Preprocessor*>(PP);
+
+ PrimaryClient->BeginSourceFile(LangOpts, PP);
+}
+
+void VerifyDiagnosticConsumer::EndSourceFile() {
+ CheckDiagnostics();
+
+ PrimaryClient->EndSourceFile();
+
+ CurrentPreprocessor = 0;
+}
+
+void VerifyDiagnosticConsumer::HandleDiagnostic(
+ DiagnosticsEngine::Level DiagLevel, const Diagnostic &Info) {
+ if (FirstErrorFID.isInvalid() && Info.hasSourceManager()) {
+ const SourceManager &SM = Info.getSourceManager();
+ FirstErrorFID = SM.getFileID(Info.getLocation());
+ }
+ // Send the diagnostic to the buffer, we will check it once we reach the end
+ // of the source file (or are destructed).
+ Buffer->HandleDiagnostic(DiagLevel, Info);
+}
+
+//===----------------------------------------------------------------------===//
+// Checking diagnostics implementation.
+//===----------------------------------------------------------------------===//
+
+typedef TextDiagnosticBuffer::DiagList DiagList;
+typedef TextDiagnosticBuffer::const_iterator const_diag_iterator;
+
+namespace {
+
+/// Directive - Abstract class representing a parsed verify directive.
+///
+class Directive {
+public:
+ static Directive* Create(bool RegexKind, const SourceLocation &Location,
+ const std::string &Text, unsigned Count);
+public:
+ /// Constant representing one or more matches aka regex "+".
+ static const unsigned OneOrMoreCount = UINT_MAX;
+
+ SourceLocation Location;
+ const std::string Text;
+ unsigned Count;
+
+ virtual ~Directive() { }
+
+ // Returns true if directive text is valid.
+ // Otherwise returns false and populates E.
+ virtual bool isValid(std::string &Error) = 0;
+
+ // Returns true on match.
+ virtual bool Match(const std::string &S) = 0;
+
+protected:
+ Directive(const SourceLocation &Location, const std::string &Text,
+ unsigned Count)
+ : Location(Location), Text(Text), Count(Count) { }
+
+private:
+ Directive(const Directive&); // DO NOT IMPLEMENT
+ void operator=(const Directive&); // DO NOT IMPLEMENT
+};
+
+/// StandardDirective - Directive with string matching.
+///
+class StandardDirective : public Directive {
+public:
+ StandardDirective(const SourceLocation &Location, const std::string &Text,
+ unsigned Count)
+ : Directive(Location, Text, Count) { }
+
+ virtual bool isValid(std::string &Error) {
+ // all strings are considered valid; even empty ones
+ return true;
+ }
+
+ virtual bool Match(const std::string &S) {
+ return S.find(Text) != std::string::npos;
+ }
+};
+
+/// RegexDirective - Directive with regular-expression matching.
+///
+class RegexDirective : public Directive {
+public:
+ RegexDirective(const SourceLocation &Location, const std::string &Text,
+ unsigned Count)
+ : Directive(Location, Text, Count), Regex(Text) { }
+
+ virtual bool isValid(std::string &Error) {
+ if (Regex.isValid(Error))
+ return true;
+ return false;
+ }
+
+ virtual bool Match(const std::string &S) {
+ return Regex.match(S);
+ }
+
+private:
+ llvm::Regex Regex;
+};
+
+typedef std::vector<Directive*> DirectiveList;
+
+/// ExpectedData - owns directive objects and deletes on destructor.
+///
+struct ExpectedData {
+ DirectiveList Errors;
+ DirectiveList Warnings;
+ DirectiveList Notes;
+
+ ~ExpectedData() {
+ DirectiveList* Lists[] = { &Errors, &Warnings, &Notes, 0 };
+ for (DirectiveList **PL = Lists; *PL; ++PL) {
+ DirectiveList * const L = *PL;
+ for (DirectiveList::iterator I = L->begin(), E = L->end(); I != E; ++I)
+ delete *I;
+ }
+ }
+};
+
+class ParseHelper
+{
+public:
+ ParseHelper(const char *Begin, const char *End)
+ : Begin(Begin), End(End), C(Begin), P(Begin), PEnd(NULL) { }
+
+ // Return true if string literal is next.
+ bool Next(StringRef S) {
+ P = C;
+ PEnd = C + S.size();
+ if (PEnd > End)
+ return false;
+ return !memcmp(P, S.data(), S.size());
+ }
+
+ // Return true if number is next.
+ // Output N only if number is next.
+ bool Next(unsigned &N) {
+ unsigned TMP = 0;
+ P = C;
+ for (; P < End && P[0] >= '0' && P[0] <= '9'; ++P) {
+ TMP *= 10;
+ TMP += P[0] - '0';
+ }
+ if (P == C)
+ return false;
+ PEnd = P;
+ N = TMP;
+ return true;
+ }
+
+ // Return true if string literal is found.
+ // When true, P marks begin-position of S in content.
+ bool Search(StringRef S) {
+ P = std::search(C, End, S.begin(), S.end());
+ PEnd = P + S.size();
+ return P != End;
+ }
+
+ // Advance 1-past previous next/search.
+ // Behavior is undefined if previous next/search failed.
+ bool Advance() {
+ C = PEnd;
+ return C < End;
+ }
+
+ // Skip zero or more whitespace.
+ void SkipWhitespace() {
+ for (; C < End && isspace(*C); ++C)
+ ;
+ }
+
+ // Return true if EOF reached.
+ bool Done() {
+ return !(C < End);
+ }
+
+ const char * const Begin; // beginning of expected content
+ const char * const End; // end of expected content (1-past)
+ const char *C; // position of next char in content
+ const char *P;
+
+private:
+ const char *PEnd; // previous next/search subject end (1-past)
+};
+
+} // namespace anonymous
+
+/// ParseDirective - Go through the comment and see if it indicates expected
+/// diagnostics. If so, then put them in the appropriate directive list.
+///
+static void ParseDirective(const char *CommentStart, unsigned CommentLen,
+ ExpectedData &ED, Preprocessor &PP,
+ SourceLocation Pos) {
+ // A single comment may contain multiple directives.
+ for (ParseHelper PH(CommentStart, CommentStart+CommentLen); !PH.Done();) {
+ // search for token: expected
+ if (!PH.Search("expected"))
+ break;
+ PH.Advance();
+
+ // next token: -
+ if (!PH.Next("-"))
+ continue;
+ PH.Advance();
+
+ // next token: { error | warning | note }
+ DirectiveList* DL = NULL;
+ if (PH.Next("error"))
+ DL = &ED.Errors;
+ else if (PH.Next("warning"))
+ DL = &ED.Warnings;
+ else if (PH.Next("note"))
+ DL = &ED.Notes;
+ else
+ continue;
+ PH.Advance();
+
+ // default directive kind
+ bool RegexKind = false;
+ const char* KindStr = "string";
+
+ // next optional token: -
+ if (PH.Next("-re")) {
+ PH.Advance();
+ RegexKind = true;
+ KindStr = "regex";
+ }
+
+ // skip optional whitespace
+ PH.SkipWhitespace();
+
+ // next optional token: positive integer or a '+'.
+ unsigned Count = 1;
+ if (PH.Next(Count))
+ PH.Advance();
+ else if (PH.Next("+")) {
+ Count = Directive::OneOrMoreCount;
+ PH.Advance();
+ }
+
+ // skip optional whitespace
+ PH.SkipWhitespace();
+
+ // next token: {{
+ if (!PH.Next("{{")) {
+ PP.Diag(Pos.getLocWithOffset(PH.C-PH.Begin),
+ diag::err_verify_missing_start) << KindStr;
+ continue;
+ }
+ PH.Advance();
+ const char* const ContentBegin = PH.C; // mark content begin
+
+ // search for token: }}
+ if (!PH.Search("}}")) {
+ PP.Diag(Pos.getLocWithOffset(PH.C-PH.Begin),
+ diag::err_verify_missing_end) << KindStr;
+ continue;
+ }
+ const char* const ContentEnd = PH.P; // mark content end
+ PH.Advance();
+
+ // build directive text; convert \n to newlines
+ std::string Text;
+ StringRef NewlineStr = "\\n";
+ StringRef Content(ContentBegin, ContentEnd-ContentBegin);
+ size_t CPos = 0;
+ size_t FPos;
+ while ((FPos = Content.find(NewlineStr, CPos)) != StringRef::npos) {
+ Text += Content.substr(CPos, FPos-CPos);
+ Text += '\n';
+ CPos = FPos + NewlineStr.size();
+ }
+ if (Text.empty())
+ Text.assign(ContentBegin, ContentEnd);
+
+ // construct new directive
+ Directive *D = Directive::Create(RegexKind, Pos, Text, Count);
+ std::string Error;
+ if (D->isValid(Error))
+ DL->push_back(D);
+ else {
+ PP.Diag(Pos.getLocWithOffset(ContentBegin-PH.Begin),
+ diag::err_verify_invalid_content)
+ << KindStr << Error;
+ }
+ }
+}
+
+/// FindExpectedDiags - Lex the main source file to find all of the
+// expected errors and warnings.
+static void FindExpectedDiags(Preprocessor &PP, ExpectedData &ED, FileID FID) {
+ // Create a raw lexer to pull all the comments out of FID.
+ if (FID.isInvalid())
+ return;
+
+ SourceManager& SM = PP.getSourceManager();
+ // Create a lexer to lex all the tokens of the main file in raw mode.
+ const llvm::MemoryBuffer *FromFile = SM.getBuffer(FID);
+ Lexer RawLex(FID, FromFile, SM, PP.getLangOpts());
+
+ // Return comments as tokens, this is how we find expected diagnostics.
+ RawLex.SetCommentRetentionState(true);
+
+ Token Tok;
+ Tok.setKind(tok::comment);
+ while (Tok.isNot(tok::eof)) {
+ RawLex.Lex(Tok);
+ if (!Tok.is(tok::comment)) continue;
+
+ std::string Comment = PP.getSpelling(Tok);
+ if (Comment.empty()) continue;
+
+ // Find all expected errors/warnings/notes.
+ ParseDirective(&Comment[0], Comment.size(), ED, PP, Tok.getLocation());
+ };
+}
+
+/// PrintProblem - This takes a diagnostic map of the delta between expected and
+/// seen diagnostics. If there's anything in it, then something unexpected
+/// happened. Print the map out in a nice format and return "true". If the map
+/// is empty and we're not going to print things, then return "false".
+///
+static unsigned PrintProblem(DiagnosticsEngine &Diags, SourceManager *SourceMgr,
+ const_diag_iterator diag_begin,
+ const_diag_iterator diag_end,
+ const char *Kind, bool Expected) {
+ if (diag_begin == diag_end) return 0;
+
+ SmallString<256> Fmt;
+ llvm::raw_svector_ostream OS(Fmt);
+ for (const_diag_iterator I = diag_begin, E = diag_end; I != E; ++I) {
+ if (I->first.isInvalid() || !SourceMgr)
+ OS << "\n (frontend)";
+ else
+ OS << "\n Line " << SourceMgr->getPresumedLineNumber(I->first);
+ OS << ": " << I->second;
+ }
+
+ Diags.Report(diag::err_verify_inconsistent_diags)
+ << Kind << !Expected << OS.str();
+ return std::distance(diag_begin, diag_end);
+}
+
+static unsigned PrintProblem(DiagnosticsEngine &Diags, SourceManager *SourceMgr,
+ DirectiveList &DL, const char *Kind,
+ bool Expected) {
+ if (DL.empty())
+ return 0;
+
+ SmallString<256> Fmt;
+ llvm::raw_svector_ostream OS(Fmt);
+ for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
+ Directive& D = **I;
+ if (D.Location.isInvalid() || !SourceMgr)
+ OS << "\n (frontend)";
+ else
+ OS << "\n Line " << SourceMgr->getPresumedLineNumber(D.Location);
+ OS << ": " << D.Text;
+ }
+
+ Diags.Report(diag::err_verify_inconsistent_diags)
+ << Kind << !Expected << OS.str();
+ return DL.size();
+}
+
+/// CheckLists - Compare expected to seen diagnostic lists and return the
+/// the difference between them.
+///
+static unsigned CheckLists(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
+ const char *Label,
+ DirectiveList &Left,
+ const_diag_iterator d2_begin,
+ const_diag_iterator d2_end) {
+ DirectiveList LeftOnly;
+ DiagList Right(d2_begin, d2_end);
+
+ for (DirectiveList::iterator I = Left.begin(), E = Left.end(); I != E; ++I) {
+ Directive& D = **I;
+ unsigned LineNo1 = SourceMgr.getPresumedLineNumber(D.Location);
+ bool FoundOnce = false;
+
+ for (unsigned i = 0; i < D.Count; ++i) {
+ DiagList::iterator II, IE;
+ for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
+ unsigned LineNo2 = SourceMgr.getPresumedLineNumber(II->first);
+ if (LineNo1 != LineNo2)
+ continue;
+
+ const std::string &RightText = II->second;
+ if (D.Match(RightText))
+ break;
+ }
+ if (II == IE) {
+ if (D.Count == D.OneOrMoreCount) {
+ if (!FoundOnce)
+ LeftOnly.push_back(*I);
+ // We are only interested in at least one match, so exit the loop.
+ break;
+ }
+ // Not found.
+ LeftOnly.push_back(*I);
+ } else {
+ // Found. The same cannot be found twice.
+ Right.erase(II);
+ FoundOnce = true;
+ }
+ }
+ }
+ // Now all that's left in Right are those that were not matched.
+ unsigned num = PrintProblem(Diags, &SourceMgr, LeftOnly, Label, true);
+ num += PrintProblem(Diags, &SourceMgr, Right.begin(), Right.end(),
+ Label, false);
+ return num;
+}
+
+/// CheckResults - This compares the expected results to those that
+/// were actually reported. It emits any discrepencies. Return "true" if there
+/// were problems. Return "false" otherwise.
+///
+static unsigned CheckResults(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
+ const TextDiagnosticBuffer &Buffer,
+ ExpectedData &ED) {
+ // We want to capture the delta between what was expected and what was
+ // seen.
+ //
+ // Expected \ Seen - set expected but not seen
+ // Seen \ Expected - set seen but not expected
+ unsigned NumProblems = 0;
+
+ // See if there are error mismatches.
+ NumProblems += CheckLists(Diags, SourceMgr, "error", ED.Errors,
+ Buffer.err_begin(), Buffer.err_end());
+
+ // See if there are warning mismatches.
+ NumProblems += CheckLists(Diags, SourceMgr, "warning", ED.Warnings,
+ Buffer.warn_begin(), Buffer.warn_end());
+
+ // See if there are note mismatches.
+ NumProblems += CheckLists(Diags, SourceMgr, "note", ED.Notes,
+ Buffer.note_begin(), Buffer.note_end());
+
+ return NumProblems;
+}
+
+void VerifyDiagnosticConsumer::CheckDiagnostics() {
+ ExpectedData ED;
+
+ // Ensure any diagnostics go to the primary client.
+ bool OwnsCurClient = Diags.ownsClient();
+ DiagnosticConsumer *CurClient = Diags.takeClient();
+ Diags.setClient(PrimaryClient, false);
+
+ // If we have a preprocessor, scan the source for expected diagnostic
+ // markers. If not then any diagnostics are unexpected.
+ if (CurrentPreprocessor) {
+ SourceManager &SM = CurrentPreprocessor->getSourceManager();
+ // Extract expected-error strings from main file.
+ FindExpectedDiags(*CurrentPreprocessor, ED, SM.getMainFileID());
+ // Only check for expectations in other diagnostic locations
+ // if they are not the main file (via ID or FileEntry) - the main
+ // file has already been looked at, and its expectations must not
+ // be added twice.
+ if (!FirstErrorFID.isInvalid() && FirstErrorFID != SM.getMainFileID()
+ && (!SM.getFileEntryForID(FirstErrorFID)
+ || (SM.getFileEntryForID(FirstErrorFID) !=
+ SM.getFileEntryForID(SM.getMainFileID())))) {
+ FindExpectedDiags(*CurrentPreprocessor, ED, FirstErrorFID);
+ FirstErrorFID = FileID();
+ }
+
+ // Check that the expected diagnostics occurred.
+ NumErrors += CheckResults(Diags, SM, *Buffer, ED);
+ } else {
+ NumErrors += (PrintProblem(Diags, 0,
+ Buffer->err_begin(), Buffer->err_end(),
+ "error", false) +
+ PrintProblem(Diags, 0,
+ Buffer->warn_begin(), Buffer->warn_end(),
+ "warn", false) +
+ PrintProblem(Diags, 0,
+ Buffer->note_begin(), Buffer->note_end(),
+ "note", false));
+ }
+
+ Diags.takeClient();
+ Diags.setClient(CurClient, OwnsCurClient);
+
+ // Reset the buffer, we have processed all the diagnostics in it.
+ Buffer.reset(new TextDiagnosticBuffer());
+}
+
+DiagnosticConsumer *
+VerifyDiagnosticConsumer::clone(DiagnosticsEngine &Diags) const {
+ if (!Diags.getClient())
+ Diags.setClient(PrimaryClient->clone(Diags));
+
+ return new VerifyDiagnosticConsumer(Diags);
+}
+
+Directive* Directive::Create(bool RegexKind, const SourceLocation &Location,
+ const std::string &Text, unsigned Count) {
+ if (RegexKind)
+ return new RegexDirective(Location, Text, Count);
+ return new StandardDirective(Location, Text, Count);
+}
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