clang-tools 20.0.0git
RestrictSystemIncludesCheck.cpp
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1//===--- RestrictSystemIncludesCheck.cpp - clang-tidy ---------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
10#include "clang/Frontend/CompilerInstance.h"
11#include "clang/Lex/HeaderSearch.h"
12#include "clang/Lex/PPCallbacks.h"
13#include "clang/Lex/Preprocessor.h"
14#include "llvm/ADT/DenseMap.h"
15#include "llvm/ADT/SmallVector.h"
16#include "llvm/Support/Path.h"
17#include <cstring>
18
20
22 SourceLocation HashLoc, const Token &IncludeTok, StringRef FileName,
23 bool IsAngled, CharSourceRange FilenameRange, OptionalFileEntryRef File,
24 StringRef SearchPath, StringRef RelativePath, const Module *SuggestedModule,
25 bool ModuleImported, SrcMgr::CharacteristicKind FileType) {
26 if (!Check.contains(FileName) && SrcMgr::isSystem(FileType)) {
27 SmallString<256> FullPath;
28 llvm::sys::path::append(FullPath, SearchPath);
29 llvm::sys::path::append(FullPath, RelativePath);
30 // Bucket the allowed include directives by the id of the file they were
31 // declared in.
32 IncludeDirectives[SM.getFileID(HashLoc)].emplace_back(
33 HashLoc, FilenameRange, FileName, FullPath.str(),
34 SM.isInMainFile(HashLoc));
35 }
36}
37
39 for (const auto &Bucket : IncludeDirectives) {
40 const FileIncludes &FileDirectives = Bucket.second;
41
42 // Emit fixits for all restricted includes.
43 for (const auto &Include : FileDirectives) {
44 // Fetch the length of the include statement from the start to just after
45 // the newline, for finding the end (including the newline).
46 unsigned ToLen = std::strcspn(SM.getCharacterData(Include.Loc), "\n") + 1;
47 CharSourceRange ToRange = CharSourceRange::getCharRange(
48 Include.Loc, Include.Loc.getLocWithOffset(ToLen));
49
50 if (!Include.IsInMainFile) {
51 auto D = Check.diag(
52 Include.Loc,
53 "system include %0 not allowed, transitively included from %1");
54 D << Include.IncludeFile << SM.getFilename(Include.Loc);
55 D << FixItHint::CreateRemoval(ToRange);
56 continue;
57 }
58 auto D = Check.diag(Include.Loc, "system include %0 not allowed");
59 D << Include.IncludeFile;
60 D << FixItHint::CreateRemoval(ToRange);
61 }
62 }
63}
64
66 const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) {
67 PP->addPPCallbacks(
68 std::make_unique<RestrictedIncludesPPCallbacks>(*this, SM));
69}
70
73 Options.store(Opts, "Includes", AllowedIncludes);
74}
75
76} // namespace clang::tidy::portability
bool IsAngled
true if this was an include with angle brackets
StringRef FileName
void store(ClangTidyOptions::OptionMap &Options, StringRef LocalName, StringRef Value) const
Stores an option with the check-local name LocalName with string value Value to Options.
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP, Preprocessor *ModuleExpanderPP) override
Override this to register PPCallbacks in the preprocessor.
void storeOptions(ClangTidyOptions::OptionMap &Opts) override
Should store all options supported by this check with their current values or default values for opti...
void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok, StringRef FileName, bool IsAngled, CharSourceRange FilenameRange, OptionalFileEntryRef File, StringRef SearchPath, StringRef RelativePath, const Module *SuggestedModule, bool ModuleImported, SrcMgr::CharacteristicKind FileType) override
llvm::StringMap< ClangTidyValue > OptionMap