clang-tools-extra/clang-tidy/concurrency/ThreadCanceltypeAsynchronousCheck.cpp

   1 //===--- ThreadCanceltypeAsynchronousCheck.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 "ThreadCanceltypeAsynchronousCheck.h"
  10 #include "clang/AST/ASTContext.h"
  11 #include "clang/ASTMatchers/ASTMatchFinder.h"
  12 #include "clang/Lex/Preprocessor.h"
  13
  14 using namespace clang::ast_matchers;
  15
  16 namespace clang::tidy::concurrency {
  17
  18 void ThreadCanceltypeAsynchronousCheck::registerMatchers(MatchFinder *Finder) {
  19   Finder->addMatcher(
  20       callExpr(
  21           callee(functionDecl(hasName("::pthread_setcanceltype"))),
  22           argumentCountIs(2),
  23           hasArgument(0, isExpandedFromMacro("PTHREAD_CANCEL_ASYNCHRONOUS")))
  24           .bind("setcanceltype"),
  25       this);
  26 }
  27
  28 void ThreadCanceltypeAsynchronousCheck::check(
  29     const MatchFinder::MatchResult &Result) {
  30   const auto *MatchedExpr = Result.Nodes.getNodeAs<Expr>("setcanceltype");
  31   diag(MatchedExpr->getBeginLoc(), "the cancel type for a pthread should not "
  32                                    "be 'PTHREAD_CANCEL_ASYNCHRONOUS'");
  33 }
  34
  35 } // namespace clang::tidy::concurrency