clang-tools-extra/clang-tidy/android/CloexecPipeCheck.cpp

   1 //===--- CloexecPipeCheck.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
   9 #include "CloexecPipeCheck.h"
  10 #include "clang/AST/ASTContext.h"
  11 #include "clang/ASTMatchers/ASTMatchFinder.h"
  12
  13 using namespace clang::ast_matchers;
  14
  15 namespace clang::tidy::android {
  16
  17 void CloexecPipeCheck::registerMatchers(MatchFinder *Finder) {
  18   registerMatchersImpl(Finder,
  19                        functionDecl(returns(isInteger()), hasName("pipe"),
  20                                     hasParameter(0, hasType(pointsTo(isInteger())))));
  21 }
  22
  23 void CloexecPipeCheck::check(const MatchFinder::MatchResult &Result) {
  24   std::string ReplacementText =
  25       (Twine("pipe2(") + getSpellingArg(Result, 0) + ", O_CLOEXEC)").str();
  26
  27   replaceFunc(
  28       Result,
  29       "prefer pipe2() with O_CLOEXEC to avoid leaking file descriptors to child processes",
  30       ReplacementText);
  31 }
  32
  33 } // namespace clang::tidy::android