1 //===--- CloexecCreatCheck.cpp - clang-tidy--------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "CloexecCreatCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 
14 using namespace clang::ast_matchers;
15 
16 namespace clang {
17 namespace tidy {
18 namespace android {
19 
20 void CloexecCreatCheck::registerMatchers(MatchFinder *Finder) {
21   auto CharPointerType = hasType(pointerType(pointee(isAnyCharacter())));
22   auto MODETType = hasType(namedDecl(hasName("mode_t")));
23   registerMatchersImpl(Finder,
24                        functionDecl(isExternC(), returns(isInteger()),
25                                     hasName("creat"),
26                                     hasParameter(0, CharPointerType),
27                                     hasParameter(1, MODETType)));
28 }
29 
30 void CloexecCreatCheck::check(const MatchFinder::MatchResult &Result) {
31   const std::string &ReplacementText =
32       (Twine("open (") + getSpellingArg(Result, 0) +
33        ", O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, " +
34        getSpellingArg(Result, 1) + ")")
35           .str();
36   replaceFunc(Result,
37               "prefer open() to creat() because open() allows O_CLOEXEC",
38               ReplacementText);
39 }
40 
41 } // namespace android
42 } // namespace tidy
43 } // namespace clang
44