| 1 | //===--- LimitedRandomnessCheck.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 "LimitedRandomnessCheck.h" |
| 10 | #include "clang/AST/ASTContext.h" |
| 11 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
| 12 | |
| 13 | using namespace clang::ast_matchers; |
| 14 | |
| 15 | namespace clang::tidy::cert { |
| 16 | |
| 17 | void LimitedRandomnessCheck::registerMatchers(MatchFinder *Finder) { |
| 18 | Finder->addMatcher(NodeMatch: callExpr(callee(InnerMatcher: functionDecl(namedDecl(hasName(Name: "::rand")), |
| 19 | parameterCountIs(N: 0)))) |
| 20 | .bind(ID: "randomGenerator"), |
| 21 | Action: this); |
| 22 | } |
| 23 | |
| 24 | void LimitedRandomnessCheck::check(const MatchFinder::MatchResult &Result) { |
| 25 | std::string Msg; |
| 26 | if (getLangOpts().CPlusPlus) |
| 27 | Msg = "; use C++11 random library instead"; |
| 28 | |
| 29 | const auto *MatchedDecl = Result.Nodes.getNodeAs<CallExpr>(ID: "randomGenerator"); |
| 30 | diag(Loc: MatchedDecl->getBeginLoc(), Description: "rand() has limited randomness"+ Msg); |
| 31 | } |
| 32 | |
| 33 | } // namespace clang::tidy::cert |
| 34 |