| 1 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
|---|---|
| 2 | #include "clang/ASTMatchers/ASTMatchers.h" |
| 3 | #include "clang/Analysis/AnalysisDeclContext.h" |
| 4 | #include "clang/Frontend/ASTUnit.h" |
| 5 | #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" |
| 6 | #include "clang/Tooling/Tooling.h" |
| 7 | #include "gtest/gtest.h" |
| 8 | |
| 9 | #include <memory> |
| 10 | |
| 11 | using namespace clang; |
| 12 | using namespace ento; |
| 13 | using namespace ast_matchers; |
| 14 | |
| 15 | class IsCLibraryFunctionTest : public testing::Test { |
| 16 | std::unique_ptr<ASTUnit> ASTUnitP; |
| 17 | const FunctionDecl *Result = nullptr; |
| 18 | |
| 19 | public: |
| 20 | const FunctionDecl *getFunctionDecl() const { return Result; } |
| 21 | |
| 22 | testing::AssertionResult buildAST(StringRef Code) { |
| 23 | ASTUnitP = tooling::buildASTFromCode(Code); |
| 24 | if (!ASTUnitP) |
| 25 | return testing::AssertionFailure() << "AST construction failed"; |
| 26 | |
| 27 | ASTContext &Context = ASTUnitP->getASTContext(); |
| 28 | if (Context.getDiagnostics().hasErrorOccurred()) |
| 29 | return testing::AssertionFailure() << "Compilation error"; |
| 30 | |
| 31 | auto Matches = ast_matchers::match(Matcher: functionDecl().bind(ID: "fn"), Context); |
| 32 | if (Matches.empty()) |
| 33 | return testing::AssertionFailure() << "No function declaration found"; |
| 34 | |
| 35 | if (Matches.size() > 1) |
| 36 | return testing::AssertionFailure() |
| 37 | << "Multiple function declarations found"; |
| 38 | |
| 39 | Result = Matches[0].getNodeAs<FunctionDecl>(ID: "fn"); |
| 40 | return testing::AssertionSuccess(); |
| 41 | } |
| 42 | }; |
| 43 | |
| 44 | TEST_F(IsCLibraryFunctionTest, AcceptsGlobal) { |
| 45 | ASSERT_TRUE(buildAST(R"cpp(void fun();)cpp")); |
| 46 | EXPECT_TRUE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 47 | } |
| 48 | |
| 49 | TEST_F(IsCLibraryFunctionTest, AcceptsExternCGlobal) { |
| 50 | ASSERT_TRUE(buildAST(R"cpp(extern "C" { void fun(); })cpp")); |
| 51 | EXPECT_TRUE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 52 | } |
| 53 | |
| 54 | TEST_F(IsCLibraryFunctionTest, RejectsNoInlineNoExternalLinkage) { |
| 55 | // Functions that are neither inlined nor externally visible cannot be C |
| 56 | // library functions. |
| 57 | ASSERT_TRUE(buildAST(R"cpp(static void fun();)cpp")); |
| 58 | EXPECT_FALSE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 59 | } |
| 60 | |
| 61 | TEST_F(IsCLibraryFunctionTest, RejectsAnonymousNamespace) { |
| 62 | ASSERT_TRUE(buildAST(R"cpp(namespace { void fun(); })cpp")); |
| 63 | EXPECT_FALSE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 64 | } |
| 65 | |
| 66 | TEST_F(IsCLibraryFunctionTest, AcceptsStdNamespace) { |
| 67 | ASSERT_TRUE(buildAST(R"cpp(namespace std { void fun(); })cpp")); |
| 68 | EXPECT_TRUE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 69 | } |
| 70 | |
| 71 | TEST_F(IsCLibraryFunctionTest, RejectsOtherNamespaces) { |
| 72 | ASSERT_TRUE(buildAST(R"cpp(namespace stdx { void fun(); })cpp")); |
| 73 | EXPECT_FALSE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 74 | } |
| 75 | |
| 76 | TEST_F(IsCLibraryFunctionTest, RejectsClassStatic) { |
| 77 | ASSERT_TRUE(buildAST(R"cpp(class A { static void fun(); };)cpp")); |
| 78 | EXPECT_FALSE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 79 | } |
| 80 | |
| 81 | TEST_F(IsCLibraryFunctionTest, RejectsClassMember) { |
| 82 | ASSERT_TRUE(buildAST(R"cpp(class A { void fun(); };)cpp")); |
| 83 | EXPECT_FALSE(CheckerContext::isCLibraryFunction(getFunctionDecl())); |
| 84 | } |
| 85 |