forked from OSchip/llvm-project
cpp11-migrate: Add a class to support include directives modifications
The IncludeDirectives class helps with detecting and modifying #include directives. For now it allows the users to add angled-includes in a source file. This is a start for this class that will evolve in the future to add more functionality. This should fix the reverted commit r189037 (buildbot failures on Windows). llvm-svn: 189354
This commit is contained in:
Guillaume Papin
parent
4c6e00595b
commit
64feb39b1b
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@ -8,6 +8,7 @@ add_clang_library(migrateCore
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IncludeExcludeInfo.cpp
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PerfSupport.cpp
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Reformatting.cpp
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IncludeDirectives.cpp
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)
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target_link_libraries(migrateCore
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clangFormat
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@ -0,0 +1,474 @@
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//===-- Core/IncludeDirectives.cpp - Include directives handling ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file defines the IncludeDirectives class that helps with
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/// detecting and modifying \#include directives.
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///
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//===----------------------------------------------------------------------===//
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#include "IncludeDirectives.h"
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#include "clang/Basic/CharInfo.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Lex/Preprocessor.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringSwitch.h"
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#include <stack>
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using namespace clang;
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using namespace clang::tooling;
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using llvm::StringRef;
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/// \brief PPCallbacks that fills-in the include information in the given
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/// \c IncludeDirectives.
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class IncludeDirectivesPPCallback : public clang::PPCallbacks {
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// Struct helping the detection of header guards in the various callbacks
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struct GuardDetection {
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GuardDetection(FileID FID)
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: FID(FID), Count(0), TheMacro(0), CountAtEndif(0) {}
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FileID FID;
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// count for relevant preprocessor directives
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unsigned Count;
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// the macro that is tested in the top most ifndef for the header guard
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// (e.g: GUARD_H)
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const IdentifierInfo *TheMacro;
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// the hash locations of #ifndef, #define, #endif
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SourceLocation IfndefLoc, DefineLoc, EndifLoc;
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// the value of Count once the #endif is reached
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unsigned CountAtEndif;
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/// \brief Check that with all the information gathered if this is a
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/// potential header guard.
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///
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/// Meaning a top-most \#ifndef has been found, followed by a define and the
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/// last preprocessor directive was the terminating \#endif.
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///
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/// FIXME: accept the \#if !defined identifier form too.
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bool isPotentialHeaderGuard() const {
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return Count == CountAtEndif && DefineLoc.isValid();
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}
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};
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public:
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IncludeDirectivesPPCallback(IncludeDirectives *Self) : Self(Self), Guard(0) {}
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private:
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virtual ~IncludeDirectivesPPCallback() {}
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void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok,
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StringRef FileName, bool IsAngled,
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CharSourceRange FilenameRange, const FileEntry *File,
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StringRef SearchPath, StringRef RelativePath,
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const Module *Imported) LLVM_OVERRIDE {
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SourceManager &SM = Self->Sources;
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const FileEntry *FE = SM.getFileEntryForID(SM.getFileID(HashLoc));
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assert(FE && "Valid file expected.");
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IncludeDirectives::Entry E(HashLoc, File, IsAngled);
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Self->FileToEntries[FE].push_back(E);
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Self->IncludeAsWrittenToLocationsMap[FileName].push_back(HashLoc);
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}
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// Keep track of the current file in the stack
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virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
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SrcMgr::CharacteristicKind FileType,
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FileID PrevFID) {
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SourceManager &SM = Self->Sources;
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switch (Reason) {
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case EnterFile:
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Files.push(GuardDetection(SM.getFileID(Loc)));
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Guard = &Files.top();
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break;
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case ExitFile:
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if (Guard->isPotentialHeaderGuard())
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handlePotentialHeaderGuard(*Guard);
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Files.pop();
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Guard = &Files.top();
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break;
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default:
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break;
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}
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}
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/// \brief Mark this header as guarded in the IncludeDirectives if it's a
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/// proper header guard.
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void handlePotentialHeaderGuard(const GuardDetection &Guard) {
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SourceManager &SM = Self->Sources;
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const FileEntry *File = SM.getFileEntryForID(Guard.FID);
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const LangOptions &LangOpts = Self->CI.getLangOpts();
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// Null file can happen for the <built-in> buffer for example. They
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// shouldn't have header guards though...
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if (!File)
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return;
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// The #ifndef should be the next thing after the preamble. We aren't
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// checking for equality because it can also be part of the preamble if the
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// preamble is the whole file.
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unsigned Preamble =
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Lexer::ComputePreamble(SM.getBuffer(Guard.FID), LangOpts).first;
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unsigned IfndefOffset = SM.getFileOffset(Guard.IfndefLoc);
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if (IfndefOffset > (Preamble + 1))
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return;
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// No code is allowed in the code remaining after the #endif.
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const llvm::MemoryBuffer *Buffer = SM.getBuffer(Guard.FID);
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Lexer Lex(SM.getLocForStartOfFile(Guard.FID), LangOpts,
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Buffer->getBufferStart(),
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Buffer->getBufferStart() + SM.getFileOffset(Guard.EndifLoc),
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Buffer->getBufferEnd());
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// Find the first newline not part of a multi-line comment.
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Token Tok;
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Lex.LexFromRawLexer(Tok); // skip endif
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Lex.LexFromRawLexer(Tok);
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// Not a proper header guard, the remainder of the file contains something
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// else than comments or whitespaces.
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if (Tok.isNot(tok::eof))
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return;
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// Add to the location of the define to the IncludeDirectives for this file.
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Self->HeaderToGuard[File] = Guard.DefineLoc;
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}
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virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
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const MacroDirective *MD) {
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Guard->Count++;
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// If this #ifndef is the top-most directive and the symbol isn't defined
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// store those information in the guard detection, the next step will be to
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// check for the define.
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if (Guard->Count == 1 && MD == 0) {
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IdentifierInfo *MII = MacroNameTok.getIdentifierInfo();
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if (MII->hasMacroDefinition())
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return;
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Guard->IfndefLoc = Loc;
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Guard->TheMacro = MII;
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}
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}
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virtual void MacroDefined(const Token &MacroNameTok,
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const MacroDirective *MD) {
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Guard->Count++;
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// If this #define is the second directive of the file and the symbol
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// defined is the same as the one checked in the #ifndef then store the
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// information about this define.
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if (Guard->Count == 2 && Guard->TheMacro != 0) {
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IdentifierInfo *MII = MacroNameTok.getIdentifierInfo();
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// macro unrelated to the ifndef, doesn't look like a proper header guard
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if (MII->getName() != Guard->TheMacro->getName())
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return;
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Guard->DefineLoc = MacroNameTok.getLocation();
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}
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}
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virtual void Endif(SourceLocation Loc, SourceLocation IfLoc) {
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Guard->Count++;
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// If it's the #endif corresponding to the top-most #ifndef
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if (Self->Sources.getDecomposedLoc(Guard->IfndefLoc) !=
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Self->Sources.getDecomposedLoc(IfLoc))
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return;
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// And that the top-most #ifndef was followed by the right #define
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if (Guard->DefineLoc.isInvalid())
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return;
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// Then save the information about this #endif. Once the file is exited we
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// will check if it was the final preprocessor directive.
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Guard->CountAtEndif = Guard->Count;
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Guard->EndifLoc = Loc;
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}
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virtual void MacroExpands(const Token &, const MacroDirective *, SourceRange,
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const MacroArgs *) {
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Guard->Count++;
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}
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virtual void MacroUndefined(const Token &, const MacroDirective *) {
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Guard->Count++;
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}
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virtual void Defined(const Token &, const MacroDirective *, SourceRange) {
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Guard->Count++;
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}
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virtual void If(SourceLocation, SourceRange, bool) { Guard->Count++; }
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virtual void Elif(SourceLocation, SourceRange, bool, SourceLocation) {
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Guard->Count++;
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}
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virtual void Ifdef(SourceLocation, const Token &, const MacroDirective *) {
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Guard->Count++;
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}
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virtual void Else(SourceLocation, SourceLocation) { Guard->Count++; }
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IncludeDirectives *Self;
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// keep track of the guard info through the include stack
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std::stack<GuardDetection> Files;
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// convenience field pointing to Files.top().second
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GuardDetection *Guard;
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};
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// Flags that describes where to insert newlines.
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enum NewLineFlags {
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// Prepend a newline at the beginning of the insertion.
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NL_Prepend = 0x1,
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// Prepend another newline at the end of the insertion.
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NL_PrependAnother = 0x2,
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// Add two newlines at the end of the insertion.
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NL_AppendTwice = 0x4,
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// Convenience value to enable both \c NL_Prepend and \c NL_PrependAnother.
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NL_PrependTwice = NL_Prepend | NL_PrependAnother
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};
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/// \brief Guess the end-of-line sequence used in the given FileID. If the
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/// sequence can't be guessed return an Unix-style newline.
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static StringRef guessEOL(SourceManager &SM, FileID ID) {
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StringRef Content = SM.getBufferData(ID);
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StringRef Buffer = Content.substr(Content.find_first_of("\r\n"));
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return llvm::StringSwitch<StringRef>(Buffer)
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.StartsWith("\r\n", "\r\n")
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.StartsWith("\n\r", "\n\r")
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.StartsWith("\r", "\r")
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.Default("\n");
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}
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/// \brief Find the end of the end of the directive, either the beginning of a
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/// newline or the end of file.
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//
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// \return The offset into the file where the directive ends along with a
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// boolean value indicating whether the directive ends because the end of file
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// was reached or not.
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static std::pair<unsigned, bool> findDirectiveEnd(SourceLocation HashLoc,
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SourceManager &SM,
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const LangOptions &LangOpts) {
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FileID FID = SM.getFileID(HashLoc);
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unsigned Offset = SM.getFileOffset(HashLoc);
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StringRef Content = SM.getBufferData(FID);
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Lexer Lex(SM.getLocForStartOfFile(FID), LangOpts, Content.begin(),
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Content.begin() + Offset, Content.end());
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Lex.SetCommentRetentionState(true);
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Token Tok;
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// This loop look for the newline after our directive but avoids the ones part
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// of a multi-line comments:
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//
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// #include <foo> /* long \n comment */\n
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// ~~ no ~~ yes
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for (;;) {
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// find the beginning of the end-of-line sequence
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StringRef::size_type EOLOffset = Content.find_first_of("\r\n", Offset);
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// ends because EOF was reached
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if (EOLOffset == StringRef::npos)
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return std::make_pair(Content.size(), true);
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// find the token that contains our end-of-line
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unsigned TokEnd = 0;
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do {
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Lex.LexFromRawLexer(Tok);
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TokEnd = SM.getFileOffset(Tok.getLocation()) + Tok.getLength();
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// happens when the whitespaces are eaten after a multiline comment
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if (Tok.is(tok::eof))
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return std::make_pair(EOLOffset, false);
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} while (TokEnd < EOLOffset);
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// the end-of-line is not part of a multi-line comment, return its location
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if (Tok.isNot(tok::comment))
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return std::make_pair(EOLOffset, false);
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// for the next search to start after the end of this token
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Offset = TokEnd;
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}
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}
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IncludeDirectives::IncludeDirectives(clang::CompilerInstance &CI)
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: CI(CI), Sources(CI.getSourceManager()) {
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// addPPCallbacks takes ownership of the callback
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CI.getPreprocessor().addPPCallbacks(new IncludeDirectivesPPCallback(this));
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}
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bool IncludeDirectives::lookForInclude(const FileEntry *File,
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const LocationVec &IncludeLocs,
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SeenFilesSet &Seen) const {
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// mark this file as visited
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Seen.insert(File);
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// First check if included directly in this file
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for (LocationVec::const_iterator I = IncludeLocs.begin(),
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E = IncludeLocs.end();
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I != E; ++I)
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if (Sources.getFileEntryForID(Sources.getFileID(*I)) == File)
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return true;
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// Otherwise look recursively all the included files
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FileToEntriesMap::const_iterator EntriesIt = FileToEntries.find(File);
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if (EntriesIt == FileToEntries.end())
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return false;
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for (EntryVec::const_iterator I = EntriesIt->second.begin(),
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E = EntriesIt->second.end();
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I != E; ++I) {
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// skip if this header has already been checked before
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if (Seen.count(I->getIncludedFile()))
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continue;
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if (lookForInclude(I->getIncludedFile(), IncludeLocs, Seen))
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return true;
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}
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return false;
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}
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bool IncludeDirectives::hasInclude(const FileEntry *File,
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StringRef Include) const {
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llvm::StringMap<LocationVec>::const_iterator It =
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IncludeAsWrittenToLocationsMap.find(Include);
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// Include isn't included in any file
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if (It == IncludeAsWrittenToLocationsMap.end())
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return false;
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SeenFilesSet Seen;
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return lookForInclude(File, It->getValue(), Seen);
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}
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Replacement IncludeDirectives::addAngledInclude(const clang::FileEntry *File,
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llvm::StringRef Include) {
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FileID FID = Sources.translateFile(File);
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assert(!FID.isInvalid() && "Invalid file entry given!");
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if (hasInclude(File, Include))
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return Replacement();
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unsigned Offset, NLFlags;
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llvm::tie(Offset, NLFlags) = angledIncludeInsertionOffset(FID);
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StringRef EOL = guessEOL(Sources, FID);
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llvm::SmallString<32> InsertionText;
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if (NLFlags & NL_Prepend)
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InsertionText += EOL;
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if (NLFlags & NL_PrependAnother)
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InsertionText += EOL;
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InsertionText += "#include <";
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InsertionText += Include;
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InsertionText += ">";
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if (NLFlags & NL_AppendTwice) {
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InsertionText += EOL;
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InsertionText += EOL;
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}
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return Replacement(File->getName(), Offset, 0, InsertionText);
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}
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Replacement IncludeDirectives::addAngledInclude(llvm::StringRef File,
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llvm::StringRef Include) {
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const FileEntry *Entry = Sources.getFileManager().getFile(File);
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assert(Entry && "Invalid file given!");
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return addAngledInclude(Entry, Include);
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}
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std::pair<unsigned, unsigned>
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IncludeDirectives::findFileHeaderEndOffset(FileID FID) const {
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unsigned NLFlags = NL_Prepend;
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StringRef Content = Sources.getBufferData(FID);
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Lexer Lex(Sources.getLocForStartOfFile(FID), CI.getLangOpts(),
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Content.begin(), Content.begin(), Content.end());
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Lex.SetCommentRetentionState(true);
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Lex.SetKeepWhitespaceMode(true);
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// find the first newline not part of a multi-line comment
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Token Tok;
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do {
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Lex.LexFromRawLexer(Tok);
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unsigned Offset = Sources.getFileOffset(Tok.getLocation());
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// allow one newline between the comments
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if (Tok.is(tok::unknown) && isWhitespace(Content[Offset])) {
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StringRef Whitespaces(Content.substr(Offset, Tok.getLength()));
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if (Whitespaces.count('\n') == 1 || Whitespaces.count('\r') == 1)
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Lex.LexFromRawLexer(Tok);
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else {
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// add an empty line to separate the file header and the inclusion
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NLFlags = NL_PrependTwice;
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}
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}
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} while (Tok.is(tok::comment));
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// apparently there is no header, insertion point is the beginning of the file
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if (Tok.isNot(tok::unknown))
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return std::make_pair(0, NL_AppendTwice);
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return std::make_pair(Sources.getFileOffset(Tok.getLocation()), NLFlags);
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}
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SourceLocation
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IncludeDirectives::angledIncludeHintLoc(FileID FID) const {
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FileToEntriesMap::const_iterator EntriesIt =
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FileToEntries.find(Sources.getFileEntryForID(FID));
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if (EntriesIt == FileToEntries.end())
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return SourceLocation();
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HeaderSearch &HeaderInfo = CI.getPreprocessor().getHeaderSearchInfo();
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const EntryVec &Entries = EntriesIt->second;
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EntryVec::const_reverse_iterator QuotedCandidate = Entries.rend();
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for (EntryVec::const_reverse_iterator I = Entries.rbegin(),
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E = Entries.rend();
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I != E; ++I) {
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// Headers meant for multiple inclusion can potentially appears in the
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// middle of the code thus making them a poor choice for an insertion point.
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if (!HeaderInfo.isFileMultipleIncludeGuarded(I->getIncludedFile()))
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continue;
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// return preferably the last angled include
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if (I->isAngled())
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return I->getHashLocation();
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// keep track of the last quoted include that is guarded
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if (QuotedCandidate == Entries.rend())
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QuotedCandidate = I;
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}
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if (QuotedCandidate == Entries.rend())
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return SourceLocation();
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// return the last quoted-include if we couldn't find an angled one
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return QuotedCandidate->getHashLocation();
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}
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std::pair<unsigned, unsigned>
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IncludeDirectives::angledIncludeInsertionOffset(FileID FID) const {
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SourceLocation Hint = angledIncludeHintLoc(FID);
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unsigned NL_Flags = NL_Prepend;
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// If we can't find a similar include and we are in a header check if it's a
|
||||
// guarded header. If so the hint will be the location of the #define from the
|
||||
// guard.
|
||||
if (Hint.isInvalid()) {
|
||||
const FileEntry *File = Sources.getFileEntryForID(FID);
|
||||
HeaderToGuardMap::const_iterator GuardIt = HeaderToGuard.find(File);
|
||||
if (GuardIt != HeaderToGuard.end()) {
|
||||
// get the hash location from the #define
|
||||
Hint = GuardIt->second;
|
||||
// we want a blank line between the #define and the #include
|
||||
NL_Flags = NL_PrependTwice;
|
||||
}
|
||||
}
|
||||
|
||||
// no hints, insertion is done after the file header
|
||||
if (Hint.isInvalid())
|
||||
return findFileHeaderEndOffset(FID);
|
||||
|
||||
unsigned Offset = findDirectiveEnd(Hint, Sources, CI.getLangOpts()).first;
|
||||
return std::make_pair(Offset, NL_Flags);
|
||||
}
|
||||
|
|
@ -0,0 +1,141 @@
|
|||
//===-- Core/IncludeDirectives.h - Include directives handling --*- C++ -*-===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file is distributed under the University of Illinois Open Source
|
||||
// License. See LICENSE.TXT for details.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
///
|
||||
/// \file
|
||||
/// \brief This file declares the IncludeDirectives class that helps with
|
||||
/// detecting and modifying \#include directives.
|
||||
///
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#ifndef CPP11_MIGRATE_INCLUDE_DIRECTIVES_H
|
||||
#define CPP11_MIGRATE_INCLUDE_DIRECTIVES_H
|
||||
|
||||
#include "clang/Basic/SourceLocation.h"
|
||||
#include "clang/Tooling/Refactoring.h"
|
||||
#include "llvm/ADT/DenseMap.h"
|
||||
#include "llvm/ADT/StringRef.h"
|
||||
#include "llvm/ADT/SmallPtrSet.h"
|
||||
#include <vector>
|
||||
|
||||
namespace clang {
|
||||
class Preprocessor;
|
||||
} // namespace clang
|
||||
|
||||
/// \brief Support for include directives handling.
|
||||
///
|
||||
/// This class should be created with a \c clang::CompilerInstance before the
|
||||
/// file is preprocessed in order to collect the inclusion information. It can
|
||||
/// be queried as long as the compiler instance is valid.
|
||||
class IncludeDirectives {
|
||||
public:
|
||||
IncludeDirectives(clang::CompilerInstance &CI);
|
||||
|
||||
/// \brief Add an angled include to a the given file.
|
||||
///
|
||||
/// \param File A file accessible by a SourceManager
|
||||
/// \param Include The include file as it should be written in the code.
|
||||
///
|
||||
/// \returns
|
||||
/// \li A null Replacement (check using \c Replacement::isApplicable()), if
|
||||
/// the \c Include is already visible from \c File.
|
||||
/// \li Otherwise, a non-null Replacement that, when applied, inserts an
|
||||
/// \c \#include into \c File.
|
||||
clang::tooling::Replacement addAngledInclude(llvm::StringRef File,
|
||||
llvm::StringRef Include);
|
||||
clang::tooling::Replacement addAngledInclude(const clang::FileEntry *File,
|
||||
llvm::StringRef Include);
|
||||
|
||||
/// \brief Check if \p Include is included by \p File or any of the files
|
||||
/// \p File includes.
|
||||
bool hasInclude(const clang::FileEntry *File, llvm::StringRef Include) const;
|
||||
|
||||
private:
|
||||
friend class IncludeDirectivesPPCallback;
|
||||
|
||||
/// \brief Contains information about an inclusion.
|
||||
class Entry {
|
||||
public:
|
||||
Entry(clang::SourceLocation HashLoc, const clang::FileEntry *IncludedFile,
|
||||
bool Angled)
|
||||
: HashLoc(HashLoc), IncludedFile(IncludedFile), Angled(Angled) {}
|
||||
|
||||
/// \brief The location of the '#'.
|
||||
clang::SourceLocation getHashLocation() const { return HashLoc; }
|
||||
|
||||
/// \brief The file included by this include directive.
|
||||
const clang::FileEntry *getIncludedFile() const { return IncludedFile; }
|
||||
|
||||
/// \brief \c true if the include use angle brackets, \c false otherwise
|
||||
/// when using of quotes.
|
||||
bool isAngled() const { return Angled; }
|
||||
|
||||
private:
|
||||
clang::SourceLocation HashLoc;
|
||||
const clang::FileEntry *IncludedFile;
|
||||
bool Angled;
|
||||
};
|
||||
|
||||
// A list of entries.
|
||||
typedef std::vector<Entry> EntryVec;
|
||||
|
||||
// A list of source locations.
|
||||
typedef std::vector<clang::SourceLocation> LocationVec;
|
||||
|
||||
// Associates files to their includes.
|
||||
typedef llvm::DenseMap<const clang::FileEntry *, EntryVec> FileToEntriesMap;
|
||||
|
||||
// Associates headers to their include guards if any. The location is the
|
||||
// location of the hash from the #define.
|
||||
typedef llvm::DenseMap<const clang::FileEntry *, clang::SourceLocation>
|
||||
HeaderToGuardMap;
|
||||
|
||||
/// \brief Type used by \c lookForInclude() to keep track of the files that
|
||||
/// have already been processed.
|
||||
typedef llvm::SmallPtrSet<const clang::FileEntry *, 32> SeenFilesSet;
|
||||
|
||||
/// \brief Recursively look if an include is included by \p File or any of the
|
||||
/// headers \p File includes.
|
||||
///
|
||||
/// \param File The file where to start the search.
|
||||
/// \param IncludeLocs These are the hash locations of the \#include
|
||||
/// directives we are looking for.
|
||||
/// \param Seen Used to avoid visiting a same file more than once during the
|
||||
/// recursion.
|
||||
bool lookForInclude(const clang::FileEntry *File,
|
||||
const LocationVec &IncludeLocs, SeenFilesSet &Seen) const;
|
||||
|
||||
/// \brief Find the end of a file header and returns a pair (FileOffset,
|
||||
/// NewLineFlags).
|
||||
///
|
||||
/// Source files often contain a file header (copyright, license, explanation
|
||||
/// of the file content). An \#include should preferrably be put after this.
|
||||
std::pair<unsigned, unsigned>
|
||||
findFileHeaderEndOffset(clang::FileID FID) const;
|
||||
|
||||
/// \brief Finds the offset where an angled include should be added and
|
||||
/// returns a pair (FileOffset, NewLineFlags).
|
||||
std::pair<unsigned, unsigned>
|
||||
angledIncludeInsertionOffset(clang::FileID FID) const;
|
||||
|
||||
/// \brief Find the location of an include directive that can be used to
|
||||
/// insert an inclusion after.
|
||||
///
|
||||
/// If no such include exists returns a null SourceLocation.
|
||||
clang::SourceLocation angledIncludeHintLoc(clang::FileID FID) const;
|
||||
|
||||
clang::CompilerInstance &CI;
|
||||
clang::SourceManager &Sources;
|
||||
FileToEntriesMap FileToEntries;
|
||||
// maps include filename as written in the source code to the source locations
|
||||
// where it appears
|
||||
llvm::StringMap<LocationVec> IncludeAsWrittenToLocationsMap;
|
||||
HeaderToGuardMap HeaderToGuard;
|
||||
};
|
||||
|
||||
#endif // CPP11_MIGRATE_INCLUDE_DIRECTIVES_H
|
||||
|
|
@ -13,6 +13,7 @@ add_extra_unittest(Cpp11MigrateTests
|
|||
PerfSupportTest.cpp
|
||||
TransformTest.cpp
|
||||
UniqueHeaderNameTest.cpp
|
||||
IncludeDirectivesTest.cpp
|
||||
)
|
||||
|
||||
target_link_libraries(Cpp11MigrateTests
|
||||
|
|
|
|||
|
|
@ -0,0 +1,410 @@
|
|||
//===- cpp11-migrate/IncludeDirectivesTest.cpp ----------------------------===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file is distributed under the University of Illinois Open Source
|
||||
// License. See LICENSE.TXT for details.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "Core/IncludeDirectives.h"
|
||||
#include "gtest/gtest.h"
|
||||
#include "VirtualFileHelper.h"
|
||||
#include "clang/Frontend/CompilerInstance.h"
|
||||
#include "clang/Frontend/FrontendActions.h"
|
||||
#include "llvm/Support/Path.h"
|
||||
|
||||
using namespace llvm;
|
||||
using namespace clang;
|
||||
|
||||
/// \brief A convenience method around \c tooling::runToolOnCodeWithArgs() that
|
||||
/// adds the current directory to the include search paths.
|
||||
static void applyActionOnCode(FrontendAction *ToolAction, StringRef Code) {
|
||||
SmallString<128> CurrentDir;
|
||||
ASSERT_FALSE(llvm::sys::fs::current_path(CurrentDir));
|
||||
|
||||
// Add the current directory to the header search paths so angled includes can
|
||||
// find them.
|
||||
std::vector<std::string> Args;
|
||||
Args.push_back("-I");
|
||||
Args.push_back(CurrentDir.str().str());
|
||||
|
||||
// mapVirtualFile() needs absolute path for the input file as well.
|
||||
SmallString<128> InputFile(CurrentDir);
|
||||
sys::path::append(InputFile, "input.cc");
|
||||
|
||||
ASSERT_TRUE(
|
||||
tooling::runToolOnCodeWithArgs(ToolAction, Code, Args, InputFile.str()));
|
||||
}
|
||||
|
||||
namespace {
|
||||
class TestAddIncludeAction : public PreprocessOnlyAction {
|
||||
public:
|
||||
TestAddIncludeAction(StringRef Include, tooling::Replacements &Replaces,
|
||||
const char *HeaderToModify = 0)
|
||||
: Include(Include), Replaces(Replaces), HeaderToModify(HeaderToModify) {
|
||||
// some headers that the tests can include
|
||||
mapVirtualHeader("foo-inner.h", "#pragma once\n");
|
||||
mapVirtualHeader("foo.h", "#pragma once\n"
|
||||
"#include <foo-inner.h>\n");
|
||||
mapVirtualHeader("bar-inner.h", "#pragma once\n");
|
||||
mapVirtualHeader("bar.h", "#pragma once\n"
|
||||
"#include <bar-inner.h>\n");
|
||||
mapVirtualHeader("xmacro.def", "X(Val1)\n"
|
||||
"X(Val2)\n"
|
||||
"X(Val3)\n");
|
||||
}
|
||||
|
||||
/// \brief Make \p FileName an absolute path.
|
||||
///
|
||||
/// Header files are mapped in the current working directory. The current
|
||||
/// working directory is used because it's important to map files with
|
||||
/// absolute paths.
|
||||
///
|
||||
/// When used in conjunction with \c applyActionOnCode() (which adds the
|
||||
/// current working directory to the header search paths) it is possible to
|
||||
/// refer to the headers by using '\<FileName\>'.
|
||||
std::string makeHeaderFileName(StringRef FileName) const {
|
||||
SmallString<128> Path;
|
||||
llvm::error_code EC = llvm::sys::fs::current_path(Path);
|
||||
assert(!EC);
|
||||
(void)EC;
|
||||
|
||||
sys::path::append(Path, FileName);
|
||||
return Path.str().str();
|
||||
}
|
||||
|
||||
/// \brief Map additional header files.
|
||||
///
|
||||
/// \sa makeHeaderFileName()
|
||||
void mapVirtualHeader(StringRef FileName, StringRef Content) {
|
||||
VFHelper.mapFile(makeHeaderFileName(FileName), Content);
|
||||
}
|
||||
|
||||
private:
|
||||
virtual bool BeginSourceFileAction(CompilerInstance &CI,
|
||||
StringRef FileName) LLVM_OVERRIDE {
|
||||
if (!PreprocessOnlyAction::BeginSourceFileAction(CI, FileName))
|
||||
return false;
|
||||
VFHelper.mapVirtualFiles(CI.getSourceManager());
|
||||
|
||||
FileToModify =
|
||||
HeaderToModify ? makeHeaderFileName(HeaderToModify) : FileName.str();
|
||||
|
||||
FileIncludes.reset(new IncludeDirectives(CI));
|
||||
return true;
|
||||
}
|
||||
|
||||
virtual void EndSourceFileAction() LLVM_OVERRIDE {
|
||||
const tooling::Replacement &Replace =
|
||||
FileIncludes->addAngledInclude(FileToModify, Include);
|
||||
if (Replace.isApplicable())
|
||||
Replaces.insert(Replace);
|
||||
}
|
||||
|
||||
StringRef Include;
|
||||
VirtualFileHelper VFHelper;
|
||||
tooling::Replacements &Replaces;
|
||||
OwningPtr<IncludeDirectives> FileIncludes;
|
||||
std::string FileToModify;
|
||||
// if non-null, add the include directives in this file instead of the main
|
||||
// file.
|
||||
const char *HeaderToModify;
|
||||
};
|
||||
|
||||
std::string addIncludeInCode(StringRef Include, StringRef Code) {
|
||||
tooling::Replacements Replaces;
|
||||
|
||||
applyActionOnCode(new TestAddIncludeAction(Include, Replaces), Code);
|
||||
|
||||
if (::testing::Test::HasFailure())
|
||||
return "<<unexpected error from applyActionOnCode()>>";
|
||||
|
||||
return tooling::applyAllReplacements(Code, Replaces);
|
||||
}
|
||||
} // end anonymous namespace
|
||||
|
||||
TEST(IncludeDirectivesTest2, endOfLinesVariants) {
|
||||
EXPECT_EQ("#include <foo.h>\n"
|
||||
"#include <bar>\n",
|
||||
addIncludeInCode("bar", "#include <foo.h>\n"));
|
||||
EXPECT_EQ("#include <foo.h>\r\n"
|
||||
"#include <bar>\r\n",
|
||||
addIncludeInCode("bar", "#include <foo.h>\r\n"));
|
||||
EXPECT_EQ("#include <foo.h>\r"
|
||||
"#include <bar>\r",
|
||||
addIncludeInCode("bar", "#include <foo.h>\r"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, ppToken) {
|
||||
EXPECT_EQ("#define FOO <foo.h>\n"
|
||||
"#include FOO\n"
|
||||
"#include <bar>\n"
|
||||
"int i;\n",
|
||||
addIncludeInCode("bar", "#define FOO <foo.h>\n"
|
||||
"#include FOO\n"
|
||||
"int i;\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, noFileHeader) {
|
||||
EXPECT_EQ("#include <bar>\n"
|
||||
"\n"
|
||||
"int foo;\n",
|
||||
addIncludeInCode("bar", "int foo;\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, commentBeforeTopMostCode) {
|
||||
EXPECT_EQ("#include <bar>\n"
|
||||
"\n"
|
||||
"// Foo\n"
|
||||
"int foo;\n",
|
||||
addIncludeInCode("bar", "// Foo\n"
|
||||
"int foo;\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, multiLineComment) {
|
||||
EXPECT_EQ("#include <foo.h> /* \n */\n"
|
||||
"#include <bar>\n",
|
||||
addIncludeInCode("bar", "#include <foo.h> /* \n */\n"));
|
||||
EXPECT_EQ("#include <foo.h> /* \n */"
|
||||
"\n#include <bar>",
|
||||
addIncludeInCode("bar", "#include <foo.h> /* \n */"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, multilineCommentWithTrailingSpace) {
|
||||
EXPECT_EQ("#include <foo.h> /*\n*/ \n"
|
||||
"#include <bar>\n",
|
||||
addIncludeInCode("bar", "#include <foo.h> /*\n*/ \n"));
|
||||
EXPECT_EQ("#include <foo.h> /*\n*/ "
|
||||
"\n#include <bar>",
|
||||
addIncludeInCode("bar", "#include <foo.h> /*\n*/ "));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, fileHeaders) {
|
||||
EXPECT_EQ("// this is a header\n"
|
||||
"// some license stuff here\n"
|
||||
"\n"
|
||||
"#include <bar>\n"
|
||||
"\n"
|
||||
"/// \\brief Foo\n"
|
||||
"int foo;\n",
|
||||
addIncludeInCode("bar", "// this is a header\n"
|
||||
"// some license stuff here\n"
|
||||
"\n"
|
||||
"/// \\brief Foo\n"
|
||||
"int foo;\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, preferablyAngledNextToAngled) {
|
||||
EXPECT_EQ("#include <foo.h>\n"
|
||||
"#include <bar>\n"
|
||||
"#include \"bar.h\"\n",
|
||||
addIncludeInCode("bar", "#include <foo.h>\n"
|
||||
"#include \"bar.h\"\n"));
|
||||
EXPECT_EQ("#include \"foo.h\"\n"
|
||||
"#include \"bar.h\"\n"
|
||||
"#include <bar>\n",
|
||||
addIncludeInCode("bar", "#include \"foo.h\"\n"
|
||||
"#include \"bar.h\"\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, avoidDuplicates) {
|
||||
EXPECT_EQ("#include <foo.h>\n",
|
||||
addIncludeInCode("foo.h", "#include <foo.h>\n"));
|
||||
}
|
||||
|
||||
// Tests includes in the middle of the code are ignored.
|
||||
TEST(IncludeDirectivesTest, ignoreHeadersMeantForMultipleInclusion) {
|
||||
std::string Expected = "#include \"foo.h\"\n"
|
||||
"#include <bar>\n"
|
||||
"\n"
|
||||
"enum Kind {\n"
|
||||
"#define X(A) K_##A,\n"
|
||||
"#include \"xmacro.def\"\n"
|
||||
"#undef X\n"
|
||||
" K_NUM_KINDS\n"
|
||||
"};\n";
|
||||
std::string Result = addIncludeInCode("bar", "#include \"foo.h\"\n"
|
||||
"\n"
|
||||
"enum Kind {\n"
|
||||
"#define X(A) K_##A,\n"
|
||||
"#include \"xmacro.def\"\n"
|
||||
"#undef X\n"
|
||||
" K_NUM_KINDS\n"
|
||||
"};\n");
|
||||
EXPECT_EQ(Expected, Result);
|
||||
}
|
||||
|
||||
namespace {
|
||||
TestAddIncludeAction *makeIndirectTestsAction(const char *HeaderToModify,
|
||||
tooling::Replacements &Replaces) {
|
||||
StringRef IncludeToAdd = "c.h";
|
||||
TestAddIncludeAction *TestAction =
|
||||
new TestAddIncludeAction(IncludeToAdd, Replaces, HeaderToModify);
|
||||
TestAction->mapVirtualHeader("c.h", "#pragma once\n");
|
||||
TestAction->mapVirtualHeader("a.h", "#pragma once\n"
|
||||
"#include <c.h>\n");
|
||||
TestAction->mapVirtualHeader("b.h", "#pragma once\n");
|
||||
return TestAction;
|
||||
}
|
||||
} // end anonymous namespace
|
||||
|
||||
TEST(IncludeDirectivesTest, indirectIncludes) {
|
||||
// In TestAddIncludeAction 'foo.h' includes 'foo-inner.h'. Check that we
|
||||
// aren't including foo-inner.h again.
|
||||
EXPECT_EQ("#include <foo.h>\n",
|
||||
addIncludeInCode("foo-inner.h", "#include <foo.h>\n"));
|
||||
|
||||
tooling::Replacements Replaces;
|
||||
StringRef Code = "#include <a.h>\n"
|
||||
"#include <b.h>\n";
|
||||
|
||||
// a.h already includes c.h
|
||||
{
|
||||
FrontendAction *Action = makeIndirectTestsAction("a.h", Replaces);
|
||||
ASSERT_NO_FATAL_FAILURE(applyActionOnCode(Action, Code));
|
||||
EXPECT_EQ(unsigned(0), Replaces.size());
|
||||
}
|
||||
|
||||
// c.h is included before b.h but b.h doesn't include c.h directly, so check
|
||||
// that it will be inserted.
|
||||
{
|
||||
FrontendAction *Action = makeIndirectTestsAction("b.h", Replaces);
|
||||
ASSERT_NO_FATAL_FAILURE(applyActionOnCode(Action, Code));
|
||||
EXPECT_EQ("#include <c.h>\n\n\n",
|
||||
tooling::applyAllReplacements("\n", Replaces));
|
||||
}
|
||||
}
|
||||
|
||||
/// \brief Convenience method to test header guards detection implementation.
|
||||
static std::string addIncludeInGuardedHeader(StringRef IncludeToAdd,
|
||||
StringRef GuardedHeaderCode) {
|
||||
const char *GuardedHeaderName = "guarded.h";
|
||||
tooling::Replacements Replaces;
|
||||
TestAddIncludeAction *TestAction =
|
||||
new TestAddIncludeAction(IncludeToAdd, Replaces, GuardedHeaderName);
|
||||
TestAction->mapVirtualHeader(GuardedHeaderName, GuardedHeaderCode);
|
||||
|
||||
applyActionOnCode(TestAction, "#include <guarded.h>\n");
|
||||
if (::testing::Test::HasFailure())
|
||||
return "<<unexpected error from applyActionOnCode()>>";
|
||||
|
||||
return tooling::applyAllReplacements(GuardedHeaderCode, Replaces);
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, insertInsideIncludeGuard) {
|
||||
EXPECT_EQ("#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"#include <foo>\n"
|
||||
"\n"
|
||||
"struct foo {};\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n",
|
||||
addIncludeInGuardedHeader("foo", "#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"struct foo {};\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, guardAndHeader) {
|
||||
EXPECT_EQ("// File header\n"
|
||||
"\n"
|
||||
"#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"#include <foo>\n"
|
||||
"\n"
|
||||
"struct foo {};\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n",
|
||||
addIncludeInGuardedHeader("foo", "// File header\n"
|
||||
"\n"
|
||||
"#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"struct foo {};\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, fullHeaderFitsAsAPreamble) {
|
||||
EXPECT_EQ("#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"#include <foo>\n"
|
||||
"\n"
|
||||
"#define FOO 1\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n",
|
||||
addIncludeInGuardedHeader("foo", "#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"#define FOO 1\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, codeBeforeIfndef) {
|
||||
EXPECT_EQ("#include <foo>\n"
|
||||
"\n"
|
||||
"int bar;\n"
|
||||
"\n"
|
||||
"#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"struct foo;"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n",
|
||||
addIncludeInGuardedHeader("foo", "int bar;\n"
|
||||
"\n"
|
||||
"#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"struct foo;"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, codeAfterEndif) {
|
||||
EXPECT_EQ("#include <foo>\n"
|
||||
"\n"
|
||||
"#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"struct foo;"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"
|
||||
"\n"
|
||||
"int bar;\n",
|
||||
addIncludeInGuardedHeader("foo", "#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"struct foo;"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"
|
||||
"\n"
|
||||
"int bar;\n"));
|
||||
}
|
||||
|
||||
TEST(IncludeDirectivesTest, headerGuardWithInclude) {
|
||||
EXPECT_EQ("#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"#include <bar.h>\n"
|
||||
"#include <foo>\n"
|
||||
"\n"
|
||||
"struct foo;\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n",
|
||||
addIncludeInGuardedHeader("foo", "#ifndef GUARD_H\n"
|
||||
"#define GUARD_H\n"
|
||||
"\n"
|
||||
"#include <bar.h>\n"
|
||||
"\n"
|
||||
"struct foo;\n"
|
||||
"\n"
|
||||
"#endif // GUARD_H\n"));
|
||||
}
|
||||
|
|
@ -27,8 +27,8 @@ namespace clang {
|
|||
/// map virtual files conveniently.
|
||||
class VirtualFileHelper {
|
||||
struct VirtualFile {
|
||||
llvm::StringRef FileName;
|
||||
llvm::StringRef Code;
|
||||
std::string FileName;
|
||||
std::string Code;
|
||||
};
|
||||
|
||||
public:
|
||||
|
|
@ -49,15 +49,21 @@ public:
|
|||
/// mapped to it.
|
||||
SourceManager &getNewSourceManager() {
|
||||
Sources.reset(new SourceManager(Diagnostics, Files));
|
||||
for (llvm::SmallVectorImpl<VirtualFile>::iterator I = VirtualFiles.begin(),
|
||||
mapVirtualFiles(*Sources);
|
||||
return *Sources;
|
||||
}
|
||||
|
||||
/// \brief Map the virtual file contents in the given \c SourceManager.
|
||||
void mapVirtualFiles(SourceManager &SM) const {
|
||||
for (llvm::SmallVectorImpl<VirtualFile>::const_iterator
|
||||
I = VirtualFiles.begin(),
|
||||
E = VirtualFiles.end();
|
||||
I != E; ++I) {
|
||||
llvm::MemoryBuffer *Buf = llvm::MemoryBuffer::getMemBuffer(I->Code);
|
||||
const FileEntry *Entry = Files.getVirtualFile(
|
||||
const FileEntry *Entry = SM.getFileManager().getVirtualFile(
|
||||
I->FileName, Buf->getBufferSize(), /*ModificationTime=*/0);
|
||||
Sources->overrideFileContents(Entry, Buf);
|
||||
SM.overrideFileContents(Entry, Buf);
|
||||
}
|
||||
return *Sources;
|
||||
}
|
||||
|
||||
private:
|
||||
|
|
|
|||
Loading…
Reference in New Issue