CloexecCreatCheck.cpp

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//===----------------------------------------------------------------------===//
//
// 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 "CloexecCreatCheck.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
 
using namespace clang::ast_matchers;
 
namespace clang::tidy::android {
 
void CloexecCreatCheck::registerMatchers(MatchFinder *Finder) {
  auto CharPointerType = hasType(pointerType(pointee(isAnyCharacter())));
  auto MODETType = hasType(namedDecl(hasName("mode_t")));
  registerMatchersImpl(Finder, functionDecl(isExternC(), returns(isInteger()),
                                            hasName("creat"),
                                            hasParameter(0, CharPointerType),
                                            hasParameter(1, MODETType)));
}
 
void CloexecCreatCheck::check(const MatchFinder::MatchResult &Result) {
  const std::string &ReplacementText =
      (Twine("open (") + getSpellingArg(Result, 0) +
       ", O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, " +
       getSpellingArg(Result, 1) + ")")
          .str();
  replaceFunc(Result,
              "prefer open() to creat() because open() allows O_CLOEXEC",
              ReplacementText);
}
 
} // namespace clang::tidy::android