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1171 lines
39 KiB
1171 lines
39 KiB
//===- VerifyDiagnosticConsumer.cpp - Verifying Diagnostic Client ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This is a concrete diagnostic client, which buffers the diagnostic messages.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/VerifyDiagnosticConsumer.h"
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#include "clang/Basic/CharInfo.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/DiagnosticOptions.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Basic/TokenKinds.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "clang/Frontend/TextDiagnosticBuffer.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Lex/Lexer.h"
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#include "clang/Lex/PPCallbacks.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Lex/Token.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Regex.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cassert>
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#include <cstddef>
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#include <cstring>
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#include <iterator>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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using namespace clang;
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using Directive = VerifyDiagnosticConsumer::Directive;
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using DirectiveList = VerifyDiagnosticConsumer::DirectiveList;
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using ExpectedData = VerifyDiagnosticConsumer::ExpectedData;
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#ifndef NDEBUG
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namespace {
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class VerifyFileTracker : public PPCallbacks {
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VerifyDiagnosticConsumer &Verify;
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SourceManager &SM;
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public:
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VerifyFileTracker(VerifyDiagnosticConsumer &Verify, SourceManager &SM)
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: Verify(Verify), SM(SM) {}
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/// Hook into the preprocessor and update the list of parsed
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/// files when the preprocessor indicates a new file is entered.
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void FileChanged(SourceLocation Loc, FileChangeReason Reason,
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SrcMgr::CharacteristicKind FileType,
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FileID PrevFID) override {
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Verify.UpdateParsedFileStatus(SM, SM.getFileID(Loc),
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VerifyDiagnosticConsumer::IsParsed);
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}
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};
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} // namespace
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#endif
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//===----------------------------------------------------------------------===//
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// Checking diagnostics implementation.
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//===----------------------------------------------------------------------===//
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using DiagList = TextDiagnosticBuffer::DiagList;
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using const_diag_iterator = TextDiagnosticBuffer::const_iterator;
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namespace {
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/// StandardDirective - Directive with string matching.
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class StandardDirective : public Directive {
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public:
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StandardDirective(SourceLocation DirectiveLoc, SourceLocation DiagnosticLoc,
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bool MatchAnyFileAndLine, bool MatchAnyLine, StringRef Text,
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unsigned Min, unsigned Max)
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: Directive(DirectiveLoc, DiagnosticLoc, MatchAnyFileAndLine,
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MatchAnyLine, Text, Min, Max) {}
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bool isValid(std::string &Error) override {
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// all strings are considered valid; even empty ones
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return true;
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}
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bool match(StringRef S) override {
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return S.find(Text) != StringRef::npos;
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}
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};
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/// RegexDirective - Directive with regular-expression matching.
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class RegexDirective : public Directive {
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public:
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RegexDirective(SourceLocation DirectiveLoc, SourceLocation DiagnosticLoc,
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bool MatchAnyFileAndLine, bool MatchAnyLine, StringRef Text,
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unsigned Min, unsigned Max, StringRef RegexStr)
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: Directive(DirectiveLoc, DiagnosticLoc, MatchAnyFileAndLine,
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MatchAnyLine, Text, Min, Max),
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Regex(RegexStr) {}
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bool isValid(std::string &Error) override {
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return Regex.isValid(Error);
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}
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bool match(StringRef S) override {
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return Regex.match(S);
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}
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private:
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llvm::Regex Regex;
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};
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class ParseHelper
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{
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public:
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ParseHelper(StringRef S)
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: Begin(S.begin()), End(S.end()), C(Begin), P(Begin) {}
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// Return true if string literal is next.
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bool Next(StringRef S) {
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P = C;
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PEnd = C + S.size();
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if (PEnd > End)
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return false;
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return memcmp(P, S.data(), S.size()) == 0;
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}
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// Return true if number is next.
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// Output N only if number is next.
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bool Next(unsigned &N) {
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unsigned TMP = 0;
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P = C;
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PEnd = P;
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for (; PEnd < End && *PEnd >= '0' && *PEnd <= '9'; ++PEnd) {
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TMP *= 10;
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TMP += *PEnd - '0';
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}
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if (PEnd == C)
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return false;
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N = TMP;
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return true;
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}
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// Return true if a marker is next.
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// A marker is the longest match for /#[A-Za-z0-9_-]+/.
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bool NextMarker() {
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P = C;
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if (P == End || *P != '#')
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return false;
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PEnd = P;
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++PEnd;
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while ((isAlphanumeric(*PEnd) || *PEnd == '-' || *PEnd == '_') &&
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PEnd < End)
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++PEnd;
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return PEnd > P + 1;
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}
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// Return true if string literal S is matched in content.
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// When true, P marks begin-position of the match, and calling Advance sets C
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// to end-position of the match.
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// If S is the empty string, then search for any letter instead (makes sense
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// with FinishDirectiveToken=true).
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// If EnsureStartOfWord, then skip matches that don't start a new word.
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// If FinishDirectiveToken, then assume the match is the start of a comment
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// directive for -verify, and extend the match to include the entire first
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// token of that directive.
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bool Search(StringRef S, bool EnsureStartOfWord = false,
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bool FinishDirectiveToken = false) {
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do {
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if (!S.empty()) {
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P = std::search(C, End, S.begin(), S.end());
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PEnd = P + S.size();
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}
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else {
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P = C;
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while (P != End && !isLetter(*P))
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++P;
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PEnd = P + 1;
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}
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if (P == End)
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break;
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// If not start of word but required, skip and search again.
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if (EnsureStartOfWord
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// Check if string literal starts a new word.
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&& !(P == Begin || isWhitespace(P[-1])
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// Or it could be preceded by the start of a comment.
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|| (P > (Begin + 1) && (P[-1] == '/' || P[-1] == '*')
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&& P[-2] == '/')))
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continue;
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if (FinishDirectiveToken) {
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while (PEnd != End && (isAlphanumeric(*PEnd)
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|| *PEnd == '-' || *PEnd == '_'))
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++PEnd;
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// Put back trailing digits and hyphens to be parsed later as a count
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// or count range. Because -verify prefixes must start with letters,
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// we know the actual directive we found starts with a letter, so
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// we won't put back the entire directive word and thus record an empty
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// string.
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assert(isLetter(*P) && "-verify prefix must start with a letter");
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while (isDigit(PEnd[-1]) || PEnd[-1] == '-')
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--PEnd;
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}
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return true;
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} while (Advance());
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return false;
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}
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// Return true if a CloseBrace that closes the OpenBrace at the current nest
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// level is found. When true, P marks begin-position of CloseBrace.
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bool SearchClosingBrace(StringRef OpenBrace, StringRef CloseBrace) {
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unsigned Depth = 1;
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P = C;
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while (P < End) {
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StringRef S(P, End - P);
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if (S.startswith(OpenBrace)) {
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++Depth;
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P += OpenBrace.size();
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} else if (S.startswith(CloseBrace)) {
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--Depth;
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if (Depth == 0) {
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PEnd = P + CloseBrace.size();
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return true;
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}
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P += CloseBrace.size();
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} else {
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++P;
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}
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}
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return false;
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}
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// Advance 1-past previous next/search.
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// Behavior is undefined if previous next/search failed.
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bool Advance() {
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C = PEnd;
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return C < End;
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}
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// Return the text matched by the previous next/search.
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// Behavior is undefined if previous next/search failed.
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StringRef Match() { return StringRef(P, PEnd - P); }
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// Skip zero or more whitespace.
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void SkipWhitespace() {
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for (; C < End && isWhitespace(*C); ++C)
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;
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}
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// Return true if EOF reached.
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bool Done() {
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return !(C < End);
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}
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// Beginning of expected content.
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const char * const Begin;
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// End of expected content (1-past).
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const char * const End;
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// Position of next char in content.
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const char *C;
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// Previous next/search subject start.
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const char *P;
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private:
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// Previous next/search subject end (1-past).
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const char *PEnd = nullptr;
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};
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// The information necessary to create a directive.
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struct UnattachedDirective {
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DirectiveList *DL = nullptr;
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bool RegexKind = false;
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SourceLocation DirectivePos, ContentBegin;
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std::string Text;
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unsigned Min = 1, Max = 1;
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};
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// Attach the specified directive to the line of code indicated by
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// \p ExpectedLoc.
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void attachDirective(DiagnosticsEngine &Diags, const UnattachedDirective &UD,
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SourceLocation ExpectedLoc,
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bool MatchAnyFileAndLine = false,
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bool MatchAnyLine = false) {
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// Construct new directive.
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std::unique_ptr<Directive> D = Directive::create(
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UD.RegexKind, UD.DirectivePos, ExpectedLoc, MatchAnyFileAndLine,
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MatchAnyLine, UD.Text, UD.Min, UD.Max);
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std::string Error;
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if (!D->isValid(Error)) {
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Diags.Report(UD.ContentBegin, diag::err_verify_invalid_content)
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<< (UD.RegexKind ? "regex" : "string") << Error;
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}
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UD.DL->push_back(std::move(D));
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}
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} // anonymous
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// Tracker for markers in the input files. A marker is a comment of the form
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//
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// n = 123; // #123
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//
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// ... that can be referred to by a later expected-* directive:
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//
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// // expected-error@#123 {{undeclared identifier 'n'}}
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//
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// Marker declarations must be at the start of a comment or preceded by
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// whitespace to distinguish them from uses of markers in directives.
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class VerifyDiagnosticConsumer::MarkerTracker {
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DiagnosticsEngine &Diags;
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struct Marker {
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SourceLocation DefLoc;
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SourceLocation RedefLoc;
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SourceLocation UseLoc;
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};
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llvm::StringMap<Marker> Markers;
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// Directives that couldn't be created yet because they name an unknown
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// marker.
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llvm::StringMap<llvm::SmallVector<UnattachedDirective, 2>> DeferredDirectives;
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public:
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MarkerTracker(DiagnosticsEngine &Diags) : Diags(Diags) {}
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// Register a marker.
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void addMarker(StringRef MarkerName, SourceLocation Pos) {
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auto InsertResult = Markers.insert(
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{MarkerName, Marker{Pos, SourceLocation(), SourceLocation()}});
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Marker &M = InsertResult.first->second;
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if (!InsertResult.second) {
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// Marker was redefined.
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M.RedefLoc = Pos;
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} else {
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// First definition: build any deferred directives.
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auto Deferred = DeferredDirectives.find(MarkerName);
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if (Deferred != DeferredDirectives.end()) {
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for (auto &UD : Deferred->second) {
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if (M.UseLoc.isInvalid())
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M.UseLoc = UD.DirectivePos;
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attachDirective(Diags, UD, Pos);
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}
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DeferredDirectives.erase(Deferred);
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}
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}
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}
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// Register a directive at the specified marker.
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void addDirective(StringRef MarkerName, const UnattachedDirective &UD) {
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auto MarkerIt = Markers.find(MarkerName);
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if (MarkerIt != Markers.end()) {
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Marker &M = MarkerIt->second;
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if (M.UseLoc.isInvalid())
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M.UseLoc = UD.DirectivePos;
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return attachDirective(Diags, UD, M.DefLoc);
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}
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DeferredDirectives[MarkerName].push_back(UD);
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}
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// Ensure we have no remaining deferred directives, and no
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// multiply-defined-and-used markers.
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void finalize() {
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for (auto &MarkerInfo : Markers) {
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StringRef Name = MarkerInfo.first();
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Marker &M = MarkerInfo.second;
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if (M.RedefLoc.isValid() && M.UseLoc.isValid()) {
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Diags.Report(M.UseLoc, diag::err_verify_ambiguous_marker) << Name;
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Diags.Report(M.DefLoc, diag::note_verify_ambiguous_marker) << Name;
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Diags.Report(M.RedefLoc, diag::note_verify_ambiguous_marker) << Name;
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}
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}
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for (auto &DeferredPair : DeferredDirectives) {
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Diags.Report(DeferredPair.second.front().DirectivePos,
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diag::err_verify_no_such_marker)
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<< DeferredPair.first();
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}
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}
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};
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/// ParseDirective - Go through the comment and see if it indicates expected
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/// diagnostics. If so, then put them in the appropriate directive list.
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///
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/// Returns true if any valid directives were found.
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static bool ParseDirective(StringRef S, ExpectedData *ED, SourceManager &SM,
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Preprocessor *PP, SourceLocation Pos,
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VerifyDiagnosticConsumer::DirectiveStatus &Status,
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VerifyDiagnosticConsumer::MarkerTracker &Markers) {
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DiagnosticsEngine &Diags = PP ? PP->getDiagnostics() : SM.getDiagnostics();
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// First, scan the comment looking for markers.
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for (ParseHelper PH(S); !PH.Done();) {
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if (!PH.Search("#", true))
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break;
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PH.C = PH.P;
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if (!PH.NextMarker()) {
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PH.Next("#");
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PH.Advance();
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continue;
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}
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PH.Advance();
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Markers.addMarker(PH.Match(), Pos);
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}
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// A single comment may contain multiple directives.
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bool FoundDirective = false;
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for (ParseHelper PH(S); !PH.Done();) {
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// Search for the initial directive token.
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// If one prefix, save time by searching only for its directives.
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// Otherwise, search for any potential directive token and check it later.
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const auto &Prefixes = Diags.getDiagnosticOptions().VerifyPrefixes;
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if (!(Prefixes.size() == 1 ? PH.Search(*Prefixes.begin(), true, true)
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: PH.Search("", true, true)))
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break;
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StringRef DToken = PH.Match();
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PH.Advance();
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// Default directive kind.
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UnattachedDirective D;
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const char *KindStr = "string";
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// Parse the initial directive token in reverse so we can easily determine
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// its exact actual prefix. If we were to parse it from the front instead,
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// it would be harder to determine where the prefix ends because there
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// might be multiple matching -verify prefixes because some might prefix
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// others.
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// Regex in initial directive token: -re
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if (DToken.endswith("-re")) {
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D.RegexKind = true;
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KindStr = "regex";
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DToken = DToken.substr(0, DToken.size()-3);
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}
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// Type in initial directive token: -{error|warning|note|no-diagnostics}
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bool NoDiag = false;
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StringRef DType;
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if (DToken.endswith(DType="-error"))
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D.DL = ED ? &ED->Errors : nullptr;
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else if (DToken.endswith(DType="-warning"))
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D.DL = ED ? &ED->Warnings : nullptr;
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else if (DToken.endswith(DType="-remark"))
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D.DL = ED ? &ED->Remarks : nullptr;
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else if (DToken.endswith(DType="-note"))
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D.DL = ED ? &ED->Notes : nullptr;
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else if (DToken.endswith(DType="-no-diagnostics")) {
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NoDiag = true;
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if (D.RegexKind)
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continue;
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}
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else
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continue;
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DToken = DToken.substr(0, DToken.size()-DType.size());
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// What's left in DToken is the actual prefix. That might not be a -verify
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// prefix even if there is only one -verify prefix (for example, the full
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// DToken is foo-bar-warning, but foo is the only -verify prefix).
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if (!std::binary_search(Prefixes.begin(), Prefixes.end(), DToken))
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continue;
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if (NoDiag) {
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if (Status == VerifyDiagnosticConsumer::HasOtherExpectedDirectives)
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Diags.Report(Pos, diag::err_verify_invalid_no_diags)
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<< /*IsExpectedNoDiagnostics=*/true;
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else
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Status = VerifyDiagnosticConsumer::HasExpectedNoDiagnostics;
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continue;
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}
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if (Status == VerifyDiagnosticConsumer::HasExpectedNoDiagnostics) {
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Diags.Report(Pos, diag::err_verify_invalid_no_diags)
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<< /*IsExpectedNoDiagnostics=*/false;
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continue;
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}
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Status = VerifyDiagnosticConsumer::HasOtherExpectedDirectives;
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// If a directive has been found but we're not interested
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// in storing the directive information, return now.
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if (!D.DL)
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return true;
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|
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// Next optional token: @
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|
SourceLocation ExpectedLoc;
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|
StringRef Marker;
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bool MatchAnyFileAndLine = false;
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bool MatchAnyLine = false;
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|
if (!PH.Next("@")) {
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ExpectedLoc = Pos;
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} else {
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PH.Advance();
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unsigned Line = 0;
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bool FoundPlus = PH.Next("+");
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if (FoundPlus || PH.Next("-")) {
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// Relative to current line.
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|
PH.Advance();
|
|
bool Invalid = false;
|
|
unsigned ExpectedLine = SM.getSpellingLineNumber(Pos, &Invalid);
|
|
if (!Invalid && PH.Next(Line) && (FoundPlus || Line < ExpectedLine)) {
|
|
if (FoundPlus) ExpectedLine += Line;
|
|
else ExpectedLine -= Line;
|
|
ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), ExpectedLine, 1);
|
|
}
|
|
} else if (PH.Next(Line)) {
|
|
// Absolute line number.
|
|
if (Line > 0)
|
|
ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), Line, 1);
|
|
} else if (PH.NextMarker()) {
|
|
Marker = PH.Match();
|
|
} else if (PP && PH.Search(":")) {
|
|
// Specific source file.
|
|
StringRef Filename(PH.C, PH.P-PH.C);
|
|
PH.Advance();
|
|
|
|
if (Filename == "*") {
|
|
MatchAnyFileAndLine = true;
|
|
if (!PH.Next("*")) {
|
|
Diags.Report(Pos.getLocWithOffset(PH.C - PH.Begin),
|
|
diag::err_verify_missing_line)
|
|
<< "'*'";
|
|
continue;
|
|
}
|
|
MatchAnyLine = true;
|
|
ExpectedLoc = SourceLocation();
|
|
} else {
|
|
// Lookup file via Preprocessor, like a #include.
|
|
const DirectoryLookup *CurDir;
|
|
Optional<FileEntryRef> File =
|
|
PP->LookupFile(Pos, Filename, false, nullptr, nullptr, CurDir,
|
|
nullptr, nullptr, nullptr, nullptr, nullptr);
|
|
if (!File) {
|
|
Diags.Report(Pos.getLocWithOffset(PH.C - PH.Begin),
|
|
diag::err_verify_missing_file)
|
|
<< Filename << KindStr;
|
|
continue;
|
|
}
|
|
|
|
const FileEntry *FE = &File->getFileEntry();
|
|
FileID FID = SM.translateFile(FE);
|
|
if (FID.isInvalid())
|
|
FID = SM.createFileID(FE, Pos, SrcMgr::C_User);
|
|
|
|
if (PH.Next(Line) && Line > 0)
|
|
ExpectedLoc = SM.translateLineCol(FID, Line, 1);
|
|
else if (PH.Next("*")) {
|
|
MatchAnyLine = true;
|
|
ExpectedLoc = SM.translateLineCol(FID, 1, 1);
|
|
}
|
|
}
|
|
} else if (PH.Next("*")) {
|
|
MatchAnyLine = true;
|
|
ExpectedLoc = SourceLocation();
|
|
}
|
|
|
|
if (ExpectedLoc.isInvalid() && !MatchAnyLine && Marker.empty()) {
|
|
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
|
|
diag::err_verify_missing_line) << KindStr;
|
|
continue;
|
|
}
|
|
PH.Advance();
|
|
}
|
|
|
|
// Skip optional whitespace.
|
|
PH.SkipWhitespace();
|
|
|
|
// Next optional token: positive integer or a '+'.
|
|
if (PH.Next(D.Min)) {
|
|
PH.Advance();
|
|
// A positive integer can be followed by a '+' meaning min
|
|
// or more, or by a '-' meaning a range from min to max.
|
|
if (PH.Next("+")) {
|
|
D.Max = Directive::MaxCount;
|
|
PH.Advance();
|
|
} else if (PH.Next("-")) {
|
|
PH.Advance();
|
|
if (!PH.Next(D.Max) || D.Max < D.Min) {
|
|
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
|
|
diag::err_verify_invalid_range) << KindStr;
|
|
continue;
|
|
}
|
|
PH.Advance();
|
|
} else {
|
|
D.Max = D.Min;
|
|
}
|
|
} else if (PH.Next("+")) {
|
|
// '+' on its own means "1 or more".
|
|
D.Max = Directive::MaxCount;
|
|
PH.Advance();
|
|
}
|
|
|
|
// Skip optional whitespace.
|
|
PH.SkipWhitespace();
|
|
|
|
// Next token: {{
|
|
if (!PH.Next("{{")) {
|
|
Diags.Report(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.SearchClosingBrace("{{", "}}")) {
|
|
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
|
|
diag::err_verify_missing_end) << KindStr;
|
|
continue;
|
|
}
|
|
const char* const ContentEnd = PH.P; // mark content end
|
|
PH.Advance();
|
|
|
|
D.DirectivePos = Pos;
|
|
D.ContentBegin = Pos.getLocWithOffset(ContentBegin - PH.Begin);
|
|
|
|
// Build directive text; convert \n to newlines.
|
|
StringRef NewlineStr = "\\n";
|
|
StringRef Content(ContentBegin, ContentEnd-ContentBegin);
|
|
size_t CPos = 0;
|
|
size_t FPos;
|
|
while ((FPos = Content.find(NewlineStr, CPos)) != StringRef::npos) {
|
|
D.Text += Content.substr(CPos, FPos-CPos);
|
|
D.Text += '\n';
|
|
CPos = FPos + NewlineStr.size();
|
|
}
|
|
if (D.Text.empty())
|
|
D.Text.assign(ContentBegin, ContentEnd);
|
|
|
|
// Check that regex directives contain at least one regex.
|
|
if (D.RegexKind && D.Text.find("{{") == StringRef::npos) {
|
|
Diags.Report(D.ContentBegin, diag::err_verify_missing_regex) << D.Text;
|
|
return false;
|
|
}
|
|
|
|
if (Marker.empty())
|
|
attachDirective(Diags, D, ExpectedLoc, MatchAnyFileAndLine, MatchAnyLine);
|
|
else
|
|
Markers.addDirective(Marker, D);
|
|
FoundDirective = true;
|
|
}
|
|
|
|
return FoundDirective;
|
|
}
|
|
|
|
VerifyDiagnosticConsumer::VerifyDiagnosticConsumer(DiagnosticsEngine &Diags_)
|
|
: Diags(Diags_), PrimaryClient(Diags.getClient()),
|
|
PrimaryClientOwner(Diags.takeClient()),
|
|
Buffer(new TextDiagnosticBuffer()), Markers(new MarkerTracker(Diags)),
|
|
Status(HasNoDirectives) {
|
|
if (Diags.hasSourceManager())
|
|
setSourceManager(Diags.getSourceManager());
|
|
}
|
|
|
|
VerifyDiagnosticConsumer::~VerifyDiagnosticConsumer() {
|
|
assert(!ActiveSourceFiles && "Incomplete parsing of source files!");
|
|
assert(!CurrentPreprocessor && "CurrentPreprocessor should be invalid!");
|
|
SrcManager = nullptr;
|
|
CheckDiagnostics();
|
|
assert(!Diags.ownsClient() &&
|
|
"The VerifyDiagnosticConsumer takes over ownership of the client!");
|
|
}
|
|
|
|
// DiagnosticConsumer interface.
|
|
|
|
void VerifyDiagnosticConsumer::BeginSourceFile(const LangOptions &LangOpts,
|
|
const Preprocessor *PP) {
|
|
// Attach comment handler on first invocation.
|
|
if (++ActiveSourceFiles == 1) {
|
|
if (PP) {
|
|
CurrentPreprocessor = PP;
|
|
this->LangOpts = &LangOpts;
|
|
setSourceManager(PP->getSourceManager());
|
|
const_cast<Preprocessor *>(PP)->addCommentHandler(this);
|
|
#ifndef NDEBUG
|
|
// Debug build tracks parsed files.
|
|
const_cast<Preprocessor *>(PP)->addPPCallbacks(
|
|
std::make_unique<VerifyFileTracker>(*this, *SrcManager));
|
|
#endif
|
|
}
|
|
}
|
|
|
|
assert((!PP || CurrentPreprocessor == PP) && "Preprocessor changed!");
|
|
PrimaryClient->BeginSourceFile(LangOpts, PP);
|
|
}
|
|
|
|
void VerifyDiagnosticConsumer::EndSourceFile() {
|
|
assert(ActiveSourceFiles && "No active source files!");
|
|
PrimaryClient->EndSourceFile();
|
|
|
|
// Detach comment handler once last active source file completed.
|
|
if (--ActiveSourceFiles == 0) {
|
|
if (CurrentPreprocessor)
|
|
const_cast<Preprocessor *>(CurrentPreprocessor)->
|
|
removeCommentHandler(this);
|
|
|
|
// Diagnose any used-but-not-defined markers.
|
|
Markers->finalize();
|
|
|
|
// Check diagnostics once last file completed.
|
|
CheckDiagnostics();
|
|
CurrentPreprocessor = nullptr;
|
|
LangOpts = nullptr;
|
|
}
|
|
}
|
|
|
|
void VerifyDiagnosticConsumer::HandleDiagnostic(
|
|
DiagnosticsEngine::Level DiagLevel, const Diagnostic &Info) {
|
|
if (Info.hasSourceManager()) {
|
|
// If this diagnostic is for a different source manager, ignore it.
|
|
if (SrcManager && &Info.getSourceManager() != SrcManager)
|
|
return;
|
|
|
|
setSourceManager(Info.getSourceManager());
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
// Debug build tracks unparsed files for possible
|
|
// unparsed expected-* directives.
|
|
if (SrcManager) {
|
|
SourceLocation Loc = Info.getLocation();
|
|
if (Loc.isValid()) {
|
|
ParsedStatus PS = IsUnparsed;
|
|
|
|
Loc = SrcManager->getExpansionLoc(Loc);
|
|
FileID FID = SrcManager->getFileID(Loc);
|
|
|
|
const FileEntry *FE = SrcManager->getFileEntryForID(FID);
|
|
if (FE && CurrentPreprocessor && SrcManager->isLoadedFileID(FID)) {
|
|
// If the file is a modules header file it shall not be parsed
|
|
// for expected-* directives.
|
|
HeaderSearch &HS = CurrentPreprocessor->getHeaderSearchInfo();
|
|
if (HS.findModuleForHeader(FE))
|
|
PS = IsUnparsedNoDirectives;
|
|
}
|
|
|
|
UpdateParsedFileStatus(*SrcManager, FID, PS);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// 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);
|
|
}
|
|
|
|
/// HandleComment - Hook into the preprocessor and extract comments containing
|
|
/// expected errors and warnings.
|
|
bool VerifyDiagnosticConsumer::HandleComment(Preprocessor &PP,
|
|
SourceRange Comment) {
|
|
SourceManager &SM = PP.getSourceManager();
|
|
|
|
// If this comment is for a different source manager, ignore it.
|
|
if (SrcManager && &SM != SrcManager)
|
|
return false;
|
|
|
|
SourceLocation CommentBegin = Comment.getBegin();
|
|
|
|
const char *CommentRaw = SM.getCharacterData(CommentBegin);
|
|
StringRef C(CommentRaw, SM.getCharacterData(Comment.getEnd()) - CommentRaw);
|
|
|
|
if (C.empty())
|
|
return false;
|
|
|
|
// Fold any "\<EOL>" sequences
|
|
size_t loc = C.find('\\');
|
|
if (loc == StringRef::npos) {
|
|
ParseDirective(C, &ED, SM, &PP, CommentBegin, Status, *Markers);
|
|
return false;
|
|
}
|
|
|
|
std::string C2;
|
|
C2.reserve(C.size());
|
|
|
|
for (size_t last = 0;; loc = C.find('\\', last)) {
|
|
if (loc == StringRef::npos || loc == C.size()) {
|
|
C2 += C.substr(last);
|
|
break;
|
|
}
|
|
C2 += C.substr(last, loc-last);
|
|
last = loc + 1;
|
|
|
|
if (C[last] == '\n' || C[last] == '\r') {
|
|
++last;
|
|
|
|
// Escape \r\n or \n\r, but not \n\n.
|
|
if (last < C.size())
|
|
if (C[last] == '\n' || C[last] == '\r')
|
|
if (C[last] != C[last-1])
|
|
++last;
|
|
} else {
|
|
// This was just a normal backslash.
|
|
C2 += '\\';
|
|
}
|
|
}
|
|
|
|
if (!C2.empty())
|
|
ParseDirective(C2, &ED, SM, &PP, CommentBegin, Status, *Markers);
|
|
return false;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
/// Lex the specified source file to determine whether it contains
|
|
/// any expected-* directives. As a Lexer is used rather than a full-blown
|
|
/// Preprocessor, directives inside skipped #if blocks will still be found.
|
|
///
|
|
/// \return true if any directives were found.
|
|
static bool findDirectives(SourceManager &SM, FileID FID,
|
|
const LangOptions &LangOpts) {
|
|
// Create a raw lexer to pull all the comments out of FID.
|
|
if (FID.isInvalid())
|
|
return false;
|
|
|
|
// Create a lexer to lex all the tokens of the main file in raw mode.
|
|
llvm::MemoryBufferRef FromFile = SM.getBufferOrFake(FID);
|
|
Lexer RawLex(FID, FromFile, SM, LangOpts);
|
|
|
|
// Return comments as tokens, this is how we find expected diagnostics.
|
|
RawLex.SetCommentRetentionState(true);
|
|
|
|
Token Tok;
|
|
Tok.setKind(tok::comment);
|
|
VerifyDiagnosticConsumer::DirectiveStatus Status =
|
|
VerifyDiagnosticConsumer::HasNoDirectives;
|
|
while (Tok.isNot(tok::eof)) {
|
|
RawLex.LexFromRawLexer(Tok);
|
|
if (!Tok.is(tok::comment)) continue;
|
|
|
|
std::string Comment = RawLex.getSpelling(Tok, SM, LangOpts);
|
|
if (Comment.empty()) continue;
|
|
|
|
// We don't care about tracking markers for this phase.
|
|
VerifyDiagnosticConsumer::MarkerTracker Markers(SM.getDiagnostics());
|
|
|
|
// Find first directive.
|
|
if (ParseDirective(Comment, nullptr, SM, nullptr, Tok.getLocation(),
|
|
Status, Markers))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
#endif // !NDEBUG
|
|
|
|
/// Takes a list of diagnostics that have been generated but not matched
|
|
/// by an expected-* directive and produces a diagnostic to the user from this.
|
|
static unsigned PrintUnexpected(DiagnosticsEngine &Diags, SourceManager *SourceMgr,
|
|
const_diag_iterator diag_begin,
|
|
const_diag_iterator diag_end,
|
|
const char *Kind) {
|
|
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 ";
|
|
if (const FileEntry *File = SourceMgr->getFileEntryForID(
|
|
SourceMgr->getFileID(I->first)))
|
|
OS << " File " << File->getName();
|
|
OS << " Line " << SourceMgr->getPresumedLineNumber(I->first);
|
|
}
|
|
OS << ": " << I->second;
|
|
}
|
|
|
|
Diags.Report(diag::err_verify_inconsistent_diags).setForceEmit()
|
|
<< Kind << /*Unexpected=*/true << OS.str();
|
|
return std::distance(diag_begin, diag_end);
|
|
}
|
|
|
|
/// Takes a list of diagnostics that were expected to have been generated
|
|
/// but were not and produces a diagnostic to the user from this.
|
|
static unsigned PrintExpected(DiagnosticsEngine &Diags,
|
|
SourceManager &SourceMgr,
|
|
std::vector<Directive *> &DL, const char *Kind) {
|
|
if (DL.empty())
|
|
return 0;
|
|
|
|
SmallString<256> Fmt;
|
|
llvm::raw_svector_ostream OS(Fmt);
|
|
for (const auto *D : DL) {
|
|
if (D->DiagnosticLoc.isInvalid() || D->MatchAnyFileAndLine)
|
|
OS << "\n File *";
|
|
else
|
|
OS << "\n File " << SourceMgr.getFilename(D->DiagnosticLoc);
|
|
if (D->MatchAnyLine)
|
|
OS << " Line *";
|
|
else
|
|
OS << " Line " << SourceMgr.getPresumedLineNumber(D->DiagnosticLoc);
|
|
if (D->DirectiveLoc != D->DiagnosticLoc)
|
|
OS << " (directive at "
|
|
<< SourceMgr.getFilename(D->DirectiveLoc) << ':'
|
|
<< SourceMgr.getPresumedLineNumber(D->DirectiveLoc) << ')';
|
|
OS << ": " << D->Text;
|
|
}
|
|
|
|
Diags.Report(diag::err_verify_inconsistent_diags).setForceEmit()
|
|
<< Kind << /*Unexpected=*/false << OS.str();
|
|
return DL.size();
|
|
}
|
|
|
|
/// Determine whether two source locations come from the same file.
|
|
static bool IsFromSameFile(SourceManager &SM, SourceLocation DirectiveLoc,
|
|
SourceLocation DiagnosticLoc) {
|
|
while (DiagnosticLoc.isMacroID())
|
|
DiagnosticLoc = SM.getImmediateMacroCallerLoc(DiagnosticLoc);
|
|
|
|
if (SM.isWrittenInSameFile(DirectiveLoc, DiagnosticLoc))
|
|
return true;
|
|
|
|
const FileEntry *DiagFile = SM.getFileEntryForID(SM.getFileID(DiagnosticLoc));
|
|
if (!DiagFile && SM.isWrittenInMainFile(DirectiveLoc))
|
|
return true;
|
|
|
|
return (DiagFile == SM.getFileEntryForID(SM.getFileID(DirectiveLoc)));
|
|
}
|
|
|
|
/// 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,
|
|
bool IgnoreUnexpected) {
|
|
std::vector<Directive *> LeftOnly;
|
|
DiagList Right(d2_begin, d2_end);
|
|
|
|
for (auto &Owner : Left) {
|
|
Directive &D = *Owner;
|
|
unsigned LineNo1 = SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
|
|
|
|
for (unsigned i = 0; i < D.Max; ++i) {
|
|
DiagList::iterator II, IE;
|
|
for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
|
|
if (!D.MatchAnyLine) {
|
|
unsigned LineNo2 = SourceMgr.getPresumedLineNumber(II->first);
|
|
if (LineNo1 != LineNo2)
|
|
continue;
|
|
}
|
|
|
|
if (!D.DiagnosticLoc.isInvalid() && !D.MatchAnyFileAndLine &&
|
|
!IsFromSameFile(SourceMgr, D.DiagnosticLoc, II->first))
|
|
continue;
|
|
|
|
const std::string &RightText = II->second;
|
|
if (D.match(RightText))
|
|
break;
|
|
}
|
|
if (II == IE) {
|
|
// Not found.
|
|
if (i >= D.Min) break;
|
|
LeftOnly.push_back(&D);
|
|
} else {
|
|
// Found. The same cannot be found twice.
|
|
Right.erase(II);
|
|
}
|
|
}
|
|
}
|
|
// Now all that's left in Right are those that were not matched.
|
|
unsigned num = PrintExpected(Diags, SourceMgr, LeftOnly, Label);
|
|
if (!IgnoreUnexpected)
|
|
num += PrintUnexpected(Diags, &SourceMgr, Right.begin(), Right.end(), Label);
|
|
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;
|
|
|
|
const DiagnosticLevelMask DiagMask =
|
|
Diags.getDiagnosticOptions().getVerifyIgnoreUnexpected();
|
|
|
|
// See if there are error mismatches.
|
|
NumProblems += CheckLists(Diags, SourceMgr, "error", ED.Errors,
|
|
Buffer.err_begin(), Buffer.err_end(),
|
|
bool(DiagnosticLevelMask::Error & DiagMask));
|
|
|
|
// See if there are warning mismatches.
|
|
NumProblems += CheckLists(Diags, SourceMgr, "warning", ED.Warnings,
|
|
Buffer.warn_begin(), Buffer.warn_end(),
|
|
bool(DiagnosticLevelMask::Warning & DiagMask));
|
|
|
|
// See if there are remark mismatches.
|
|
NumProblems += CheckLists(Diags, SourceMgr, "remark", ED.Remarks,
|
|
Buffer.remark_begin(), Buffer.remark_end(),
|
|
bool(DiagnosticLevelMask::Remark & DiagMask));
|
|
|
|
// See if there are note mismatches.
|
|
NumProblems += CheckLists(Diags, SourceMgr, "note", ED.Notes,
|
|
Buffer.note_begin(), Buffer.note_end(),
|
|
bool(DiagnosticLevelMask::Note & DiagMask));
|
|
|
|
return NumProblems;
|
|
}
|
|
|
|
void VerifyDiagnosticConsumer::UpdateParsedFileStatus(SourceManager &SM,
|
|
FileID FID,
|
|
ParsedStatus PS) {
|
|
// Check SourceManager hasn't changed.
|
|
setSourceManager(SM);
|
|
|
|
#ifndef NDEBUG
|
|
if (FID.isInvalid())
|
|
return;
|
|
|
|
const FileEntry *FE = SM.getFileEntryForID(FID);
|
|
|
|
if (PS == IsParsed) {
|
|
// Move the FileID from the unparsed set to the parsed set.
|
|
UnparsedFiles.erase(FID);
|
|
ParsedFiles.insert(std::make_pair(FID, FE));
|
|
} else if (!ParsedFiles.count(FID) && !UnparsedFiles.count(FID)) {
|
|
// Add the FileID to the unparsed set if we haven't seen it before.
|
|
|
|
// Check for directives.
|
|
bool FoundDirectives;
|
|
if (PS == IsUnparsedNoDirectives)
|
|
FoundDirectives = false;
|
|
else
|
|
FoundDirectives = !LangOpts || findDirectives(SM, FID, *LangOpts);
|
|
|
|
// Add the FileID to the unparsed set.
|
|
UnparsedFiles.insert(std::make_pair(FID,
|
|
UnparsedFileStatus(FE, FoundDirectives)));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void VerifyDiagnosticConsumer::CheckDiagnostics() {
|
|
// Ensure any diagnostics go to the primary client.
|
|
DiagnosticConsumer *CurClient = Diags.getClient();
|
|
std::unique_ptr<DiagnosticConsumer> Owner = Diags.takeClient();
|
|
Diags.setClient(PrimaryClient, false);
|
|
|
|
#ifndef NDEBUG
|
|
// In a debug build, scan through any files that may have been missed
|
|
// during parsing and issue a fatal error if directives are contained
|
|
// within these files. If a fatal error occurs, this suggests that
|
|
// this file is being parsed separately from the main file, in which
|
|
// case consider moving the directives to the correct place, if this
|
|
// is applicable.
|
|
if (!UnparsedFiles.empty()) {
|
|
// Generate a cache of parsed FileEntry pointers for alias lookups.
|
|
llvm::SmallPtrSet<const FileEntry *, 8> ParsedFileCache;
|
|
for (const auto &I : ParsedFiles)
|
|
if (const FileEntry *FE = I.second)
|
|
ParsedFileCache.insert(FE);
|
|
|
|
// Iterate through list of unparsed files.
|
|
for (const auto &I : UnparsedFiles) {
|
|
const UnparsedFileStatus &Status = I.second;
|
|
const FileEntry *FE = Status.getFile();
|
|
|
|
// Skip files that have been parsed via an alias.
|
|
if (FE && ParsedFileCache.count(FE))
|
|
continue;
|
|
|
|
// Report a fatal error if this file contained directives.
|
|
if (Status.foundDirectives()) {
|
|
llvm::report_fatal_error(Twine("-verify directives found after rather"
|
|
" than during normal parsing of ",
|
|
StringRef(FE ? FE->getName() : "(unknown)")));
|
|
}
|
|
}
|
|
|
|
// UnparsedFiles has been processed now, so clear it.
|
|
UnparsedFiles.clear();
|
|
}
|
|
#endif // !NDEBUG
|
|
|
|
if (SrcManager) {
|
|
// Produce an error if no expected-* directives could be found in the
|
|
// source file(s) processed.
|
|
if (Status == HasNoDirectives) {
|
|
Diags.Report(diag::err_verify_no_directives).setForceEmit();
|
|
++NumErrors;
|
|
Status = HasNoDirectivesReported;
|
|
}
|
|
|
|
// Check that the expected diagnostics occurred.
|
|
NumErrors += CheckResults(Diags, *SrcManager, *Buffer, ED);
|
|
} else {
|
|
const DiagnosticLevelMask DiagMask =
|
|
~Diags.getDiagnosticOptions().getVerifyIgnoreUnexpected();
|
|
if (bool(DiagnosticLevelMask::Error & DiagMask))
|
|
NumErrors += PrintUnexpected(Diags, nullptr, Buffer->err_begin(),
|
|
Buffer->err_end(), "error");
|
|
if (bool(DiagnosticLevelMask::Warning & DiagMask))
|
|
NumErrors += PrintUnexpected(Diags, nullptr, Buffer->warn_begin(),
|
|
Buffer->warn_end(), "warn");
|
|
if (bool(DiagnosticLevelMask::Remark & DiagMask))
|
|
NumErrors += PrintUnexpected(Diags, nullptr, Buffer->remark_begin(),
|
|
Buffer->remark_end(), "remark");
|
|
if (bool(DiagnosticLevelMask::Note & DiagMask))
|
|
NumErrors += PrintUnexpected(Diags, nullptr, Buffer->note_begin(),
|
|
Buffer->note_end(), "note");
|
|
}
|
|
|
|
Diags.setClient(CurClient, Owner.release() != nullptr);
|
|
|
|
// Reset the buffer, we have processed all the diagnostics in it.
|
|
Buffer.reset(new TextDiagnosticBuffer());
|
|
ED.Reset();
|
|
}
|
|
|
|
std::unique_ptr<Directive> Directive::create(bool RegexKind,
|
|
SourceLocation DirectiveLoc,
|
|
SourceLocation DiagnosticLoc,
|
|
bool MatchAnyFileAndLine,
|
|
bool MatchAnyLine, StringRef Text,
|
|
unsigned Min, unsigned Max) {
|
|
if (!RegexKind)
|
|
return std::make_unique<StandardDirective>(DirectiveLoc, DiagnosticLoc,
|
|
MatchAnyFileAndLine,
|
|
MatchAnyLine, Text, Min, Max);
|
|
|
|
// Parse the directive into a regular expression.
|
|
std::string RegexStr;
|
|
StringRef S = Text;
|
|
while (!S.empty()) {
|
|
if (S.startswith("{{")) {
|
|
S = S.drop_front(2);
|
|
size_t RegexMatchLength = S.find("}}");
|
|
assert(RegexMatchLength != StringRef::npos);
|
|
// Append the regex, enclosed in parentheses.
|
|
RegexStr += "(";
|
|
RegexStr.append(S.data(), RegexMatchLength);
|
|
RegexStr += ")";
|
|
S = S.drop_front(RegexMatchLength + 2);
|
|
} else {
|
|
size_t VerbatimMatchLength = S.find("{{");
|
|
if (VerbatimMatchLength == StringRef::npos)
|
|
VerbatimMatchLength = S.size();
|
|
// Escape and append the fixed string.
|
|
RegexStr += llvm::Regex::escape(S.substr(0, VerbatimMatchLength));
|
|
S = S.drop_front(VerbatimMatchLength);
|
|
}
|
|
}
|
|
|
|
return std::make_unique<RegexDirective>(DirectiveLoc, DiagnosticLoc,
|
|
MatchAnyFileAndLine, MatchAnyLine,
|
|
Text, Min, Max, RegexStr);
|
|
}
|