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1 //===--- NoAssemblerCheck.cpp - clang-tidy---------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "NoAssemblerCheck.h"
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10 #include "clang/AST/ASTContext.h"
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11 #include "clang/ASTMatchers/ASTMatchFinder.h"
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12
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13 using namespace clang::ast_matchers;
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14
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15 namespace clang {
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16 namespace tidy {
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17 namespace hicpp {
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18
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19 namespace {
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20 AST_MATCHER(VarDecl, isAsm) { return Node.hasAttr<clang::AsmLabelAttr>(); }
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21 const ast_matchers::internal::VariadicDynCastAllOfMatcher<Decl,
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22 FileScopeAsmDecl>
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23 fileScopeAsmDecl;
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24 } // namespace
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25
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26 void NoAssemblerCheck::registerMatchers(MatchFinder *Finder) {
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27 Finder->addMatcher(asmStmt().bind("asm-stmt"), this);
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28 Finder->addMatcher(fileScopeAsmDecl().bind("asm-file-scope"), this);
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29 Finder->addMatcher(varDecl(isAsm()).bind("asm-var"), this);
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30 }
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31
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32 void NoAssemblerCheck::check(const MatchFinder::MatchResult &Result) {
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33 SourceLocation ASMLocation;
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34 if (const auto *ASM = Result.Nodes.getNodeAs<AsmStmt>("asm-stmt"))
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35 ASMLocation = ASM->getAsmLoc();
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36 else if (const auto *ASM =
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37 Result.Nodes.getNodeAs<FileScopeAsmDecl>("asm-file-scope"))
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38 ASMLocation = ASM->getAsmLoc();
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39 else if (const auto *ASM = Result.Nodes.getNodeAs<VarDecl>("asm-var"))
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40 ASMLocation = ASM->getLocation();
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41 else
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42 llvm_unreachable("Unhandled case in matcher.");
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43
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44 diag(ASMLocation, "do not use inline assembler in safety-critical code");
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45 }
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46
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47 } // namespace hicpp
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48 } // namespace tidy
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49 } // namespace clang
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