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//===--- KernelNameRestrictionCheck.cpp - clang-tidy ----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "KernelNameRestrictionCheck.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Lex/PPCallbacks.h"
#include "clang/Lex/Preprocessor.h"
#include <string>
#include <vector>
using namespace clang::ast_matchers;
namespace clang::tidy::altera {
namespace {
class KernelNameRestrictionPPCallbacks : public PPCallbacks {
public:
explicit KernelNameRestrictionPPCallbacks(ClangTidyCheck &Check,
const SourceManager &SM)
: Check(Check), SM(SM) {}
void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok,
StringRef FileName, bool IsAngled,
CharSourceRange FileNameRange,
OptionalFileEntryRef File, StringRef SearchPath,
StringRef RelativePath, const Module *Imported,
SrcMgr::CharacteristicKind FileType) override;
void EndOfMainFile() override;
private:
/// Returns true if the name of the file with path FilePath is 'kernel.cl',
/// 'verilog.cl', or 'vhdl.cl'. The file name check is case insensitive.
bool fileNameIsRestricted(StringRef FilePath);
struct IncludeDirective {
SourceLocation Loc; // Location in the include directive.
StringRef FileName; // Filename as a string.
};
std::vector<IncludeDirective> IncludeDirectives;
ClangTidyCheck &Check;
const SourceManager &SM;
};
} // namespace
void KernelNameRestrictionCheck::registerPPCallbacks(const SourceManager &SM,
Preprocessor *PP,
Preprocessor *) {
PP->addPPCallbacks(
std::make_unique<KernelNameRestrictionPPCallbacks>(*this, SM));
}
void KernelNameRestrictionPPCallbacks::InclusionDirective(
SourceLocation HashLoc, const Token &, StringRef FileName, bool,
CharSourceRange, OptionalFileEntryRef, StringRef, StringRef, const Module *,
SrcMgr::CharacteristicKind) {
IncludeDirective ID = {HashLoc, FileName};
IncludeDirectives.push_back(std::move(ID));
}
bool KernelNameRestrictionPPCallbacks::fileNameIsRestricted(
StringRef FileName) {
return FileName.equals_insensitive("kernel.cl") ||
FileName.equals_insensitive("verilog.cl") ||
FileName.equals_insensitive("vhdl.cl");
}
void KernelNameRestrictionPPCallbacks::EndOfMainFile() {
// Check main file for restricted names.
const FileEntry *Entry = SM.getFileEntryForID(SM.getMainFileID());
StringRef FileName = llvm::sys::path::filename(Entry->getName());
if (fileNameIsRestricted(FileName))
Check.diag(SM.getLocForStartOfFile(SM.getMainFileID()),
"compiling '%0' may cause additional compilation errors due "
"to the name of the kernel source file; consider renaming the "
"included kernel source file")
<< FileName;
if (IncludeDirectives.empty())
return;
// Check included files for restricted names.
for (const IncludeDirective &ID : IncludeDirectives) {
StringRef FileName = llvm::sys::path::filename(ID.FileName);
if (fileNameIsRestricted(FileName))
Check.diag(ID.Loc,
"including '%0' may cause additional compilation errors due "
"to the name of the kernel source file; consider renaming the "
"included kernel source file")
<< FileName;
}
}
} // namespace clang::tidy::altera
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