CloexecPipeCheck.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 "CloexecPipeCheck.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
 
using namespace clang::ast_matchers;
 
namespace clang::tidy::android {
 
void CloexecPipeCheck::registerMatchers(MatchFinder *Finder) {
  registerMatchersImpl(
      Finder, functionDecl(returns(isInteger()), hasName("pipe"),
                           hasParameter(0, hasType(pointsTo(isInteger())))));
}
 
void CloexecPipeCheck::check(const MatchFinder::MatchResult &Result) {
  std::string ReplacementText =
      (Twine("pipe2(") + getSpellingArg(Result, 0) + ", O_CLOEXEC)").str();
 
  replaceFunc(Result,
              "prefer pipe2() with O_CLOEXEC to avoid leaking file descriptors "
              "to child processes",
              ReplacementText);
}
 
} // namespace clang::tidy::android