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//===--- SignalHandlerCheck.h - clang-tidy ----------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIGNALHANDLERCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIGNALHANDLERCHECK_H
#include "../ClangTidyCheck.h"
#include "clang/Analysis/CallGraph.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/StringSet.h"
namespace clang {
namespace tidy {
namespace bugprone {
/// Checker for signal handler functions.
///
/// For the user-facing documentation see:
/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone-signal-handler-check.html
class SignalHandlerCheck : public ClangTidyCheck {
public:
enum class AsyncSafeFunctionSetType { Minimal, POSIX };
SignalHandlerCheck(StringRef Name, ClangTidyContext *Context);
void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override;
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
private:
bool isFunctionAsyncSafe(const FunctionDecl *FD) const;
bool isSystemCallAsyncSafe(const FunctionDecl *FD) const;
void reportBug(const FunctionDecl *CalledFunction, const Expr *CallOrRef,
bool DirectHandler);
void reportHandlerCommon(llvm::df_iterator<clang::CallGraphNode *> Itr,
const CallExpr *SignalCall,
const FunctionDecl *HandlerDecl,
const Expr *HandlerRef);
clang::CallGraph CG;
AsyncSafeFunctionSetType AsyncSafeFunctionSet;
llvm::StringSet<> &ConformingFunctions;
static llvm::StringSet<> MinimalConformingFunctions;
static llvm::StringSet<> POSIXConformingFunctions;
};
} // namespace bugprone
} // namespace tidy
} // namespace clang
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIGNALHANDLERCHECK_H
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