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

   1 //===--- CloexecOpenCheck.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 "CloexecOpenCheck.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 CloexecOpenCheck::registerMatchers(MatchFinder *Finder) {
  18   auto CharPointerType = hasType(pointerType(pointee(isAnyCharacter())));
  19   registerMatchersImpl(Finder,
  20                        functionDecl(isExternC(), returns(isInteger()),
  21                                     hasAnyName("open", "open64"),
  22                                     hasParameter(0, CharPointerType),
  23                                     hasParameter(1, hasType(isInteger()))));
  24   registerMatchersImpl(Finder,
  25                        functionDecl(isExternC(), returns(isInteger()),
  26                                     hasName("openat"),
  27                                     hasParameter(0, hasType(isInteger())),
  28                                     hasParameter(1, CharPointerType),
  29                                     hasParameter(2, hasType(isInteger()))));
  30 }
  31
  32 void CloexecOpenCheck::check(const MatchFinder::MatchResult &Result) {
  33   const auto *FD = Result.Nodes.getNodeAs<FunctionDecl>(FuncDeclBindingStr);
  34   assert(FD->param_size() > 1);
  35   int ArgPos = (FD->param_size() > 2) ? 2 : 1;
  36   insertMacroFlag(Result, /*MacroFlag=*/"O_CLOEXEC", ArgPos);
  37 }
  38
  39 } // namespace clang::tidy::android