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//===--- CloexecOpenCheck.cpp - clang-tidy---------------------------------===//
//
// 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 "CloexecOpenCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
using namespace clang::ast_matchers;
namespace clang::tidy::android {
void CloexecOpenCheck::registerMatchers(MatchFinder *Finder) {
auto CharPointerType = hasType(pointerType(pointee(isAnyCharacter())));
registerMatchersImpl(Finder,
functionDecl(isExternC(), returns(isInteger()),
hasAnyName("open", "open64"),
hasParameter(0, CharPointerType),
hasParameter(1, hasType(isInteger()))));
registerMatchersImpl(Finder,
functionDecl(isExternC(), returns(isInteger()),
hasName("openat"),
hasParameter(0, hasType(isInteger())),
hasParameter(1, CharPointerType),
hasParameter(2, hasType(isInteger()))));
}
void CloexecOpenCheck::check(const MatchFinder::MatchResult &Result) {
const auto *FD = Result.Nodes.getNodeAs<FunctionDecl>(FuncDeclBindingStr);
assert(FD->param_size() > 1);
int ArgPos = (FD->param_size() > 2) ? 2 : 1;
insertMacroFlag(Result, /*MacroFlag=*/"O_CLOEXEC", ArgPos);
}
} // namespace clang::tidy::android
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