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//===--- MustCheckErrsCheck.h - clang-tidy ----------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "../ClangTidyCheck.h"
namespace clang {
namespace tidy {
namespace linuxkernel {
/// Checks Linux kernel code to see if it uses the results from the functions in
/// linux/err.h. Also checks to see if code uses the results from functions that
/// directly return a value from one of these error functions.
/// This is important in the Linux kernel because ERR_PTR, PTR_ERR, IS_ERR,
/// IS_ERR_OR_NULL, ERR_CAST, and PTR_ERR_OR_ZERO return values must be checked,
/// since positive pointers and negative error codes are being used in the same
/// context. These functions are marked with
/// __attribute__((warn_unused_result)), but some kernel versions do not have
/// this warning enabled for clang.
/// For the user-facing documentation see:
class MustCheckErrsCheck : public ClangTidyCheck {
MustCheckErrsCheck(StringRef Name, ClangTidyContext *Context)
: ClangTidyCheck(Name, Context) {}
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
} // namespace linuxkernel
} // namespace tidy
} // namespace clang