1 //===- unittests/Interpreter/InterpreterTest.cpp --- Interpreter tests ----===// 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 // Unit tests for Clang's Interpreter library. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/Interpreter/Interpreter.h" 14 15 #include "clang/AST/Decl.h" 16 #include "clang/AST/DeclGroup.h" 17 #include "clang/AST/Mangle.h" 18 #include "clang/Frontend/CompilerInstance.h" 19 #include "clang/Frontend/TextDiagnosticPrinter.h" 20 #include "clang/Interpreter/Value.h" 21 #include "clang/Sema/Lookup.h" 22 #include "clang/Sema/Sema.h" 23 24 #include "llvm/ExecutionEngine/Orc/LLJIT.h" 25 #include "llvm/Support/ManagedStatic.h" 26 #include "llvm/Support/TargetSelect.h" 27 28 #include "gmock/gmock.h" 29 #include "gtest/gtest.h" 30 31 using namespace clang; 32 33 #if defined(_AIX) 34 #define CLANG_INTERPRETER_NO_SUPPORT_EXEC 35 #endif 36 37 int Global = 42; 38 // JIT reports symbol not found on Windows without the visibility attribute. 39 REPL_EXTERNAL_VISIBILITY int getGlobal() { return Global; } 40 REPL_EXTERNAL_VISIBILITY void setGlobal(int val) { Global = val; } 41 42 namespace { 43 using Args = std::vector<const char *>; 44 static std::unique_ptr<Interpreter> 45 createInterpreter(const Args &ExtraArgs = {}, 46 DiagnosticConsumer *Client = nullptr) { 47 Args ClangArgs = {"-Xclang", "-emit-llvm-only"}; 48 ClangArgs.insert(ClangArgs.end(), ExtraArgs.begin(), ExtraArgs.end()); 49 auto CB = clang::IncrementalCompilerBuilder(); 50 CB.SetCompilerArgs(ClangArgs); 51 auto CI = cantFail(CB.CreateCpp()); 52 if (Client) 53 CI->getDiagnostics().setClient(Client, /*ShouldOwnClient=*/false); 54 return cantFail(clang::Interpreter::create(std::move(CI))); 55 } 56 57 static size_t DeclsSize(TranslationUnitDecl *PTUDecl) { 58 return std::distance(PTUDecl->decls().begin(), PTUDecl->decls().end()); 59 } 60 61 TEST(InterpreterTest, Sanity) { 62 std::unique_ptr<Interpreter> Interp = createInterpreter(); 63 64 using PTU = PartialTranslationUnit; 65 66 PTU &R1(cantFail(Interp->Parse("void g(); void g() {}"))); 67 EXPECT_EQ(2U, DeclsSize(R1.TUPart)); 68 69 PTU &R2(cantFail(Interp->Parse("int i;"))); 70 EXPECT_EQ(1U, DeclsSize(R2.TUPart)); 71 } 72 73 static std::string DeclToString(Decl *D) { 74 return llvm::cast<NamedDecl>(D)->getQualifiedNameAsString(); 75 } 76 77 TEST(InterpreterTest, IncrementalInputTopLevelDecls) { 78 std::unique_ptr<Interpreter> Interp = createInterpreter(); 79 auto R1 = Interp->Parse("int var1 = 42; int f() { return var1; }"); 80 // gtest doesn't expand into explicit bool conversions. 81 EXPECT_TRUE(!!R1); 82 auto R1DeclRange = R1->TUPart->decls(); 83 EXPECT_EQ(2U, DeclsSize(R1->TUPart)); 84 EXPECT_EQ("var1", DeclToString(*R1DeclRange.begin())); 85 EXPECT_EQ("f", DeclToString(*(++R1DeclRange.begin()))); 86 87 auto R2 = Interp->Parse("int var2 = f();"); 88 EXPECT_TRUE(!!R2); 89 auto R2DeclRange = R2->TUPart->decls(); 90 EXPECT_EQ(1U, DeclsSize(R2->TUPart)); 91 EXPECT_EQ("var2", DeclToString(*R2DeclRange.begin())); 92 } 93 94 TEST(InterpreterTest, Errors) { 95 Args ExtraArgs = {"-Xclang", "-diagnostic-log-file", "-Xclang", "-"}; 96 97 // Create the diagnostic engine with unowned consumer. 98 std::string DiagnosticOutput; 99 llvm::raw_string_ostream DiagnosticsOS(DiagnosticOutput); 100 auto DiagPrinter = std::make_unique<TextDiagnosticPrinter>( 101 DiagnosticsOS, new DiagnosticOptions()); 102 103 auto Interp = createInterpreter(ExtraArgs, DiagPrinter.get()); 104 auto Err = Interp->Parse("intentional_error v1 = 42; ").takeError(); 105 using ::testing::HasSubstr; 106 EXPECT_THAT(DiagnosticsOS.str(), 107 HasSubstr("error: unknown type name 'intentional_error'")); 108 EXPECT_EQ("Parsing failed.", llvm::toString(std::move(Err))); 109 110 auto RecoverErr = Interp->Parse("int var1 = 42;"); 111 EXPECT_TRUE(!!RecoverErr); 112 } 113 114 // Here we test whether the user can mix declarations and statements. The 115 // interpreter should be smart enough to recognize the declarations from the 116 // statements and wrap the latter into a declaration, producing valid code. 117 TEST(InterpreterTest, DeclsAndStatements) { 118 Args ExtraArgs = {"-Xclang", "-diagnostic-log-file", "-Xclang", "-"}; 119 120 // Create the diagnostic engine with unowned consumer. 121 std::string DiagnosticOutput; 122 llvm::raw_string_ostream DiagnosticsOS(DiagnosticOutput); 123 auto DiagPrinter = std::make_unique<TextDiagnosticPrinter>( 124 DiagnosticsOS, new DiagnosticOptions()); 125 126 auto Interp = createInterpreter(ExtraArgs, DiagPrinter.get()); 127 auto R1 = Interp->Parse( 128 "int var1 = 42; extern \"C\" int printf(const char*, ...);"); 129 // gtest doesn't expand into explicit bool conversions. 130 EXPECT_TRUE(!!R1); 131 132 auto *PTU1 = R1->TUPart; 133 EXPECT_EQ(2U, DeclsSize(PTU1)); 134 135 auto R2 = Interp->Parse("var1++; printf(\"var1 value %d\\n\", var1);"); 136 EXPECT_TRUE(!!R2); 137 } 138 139 TEST(InterpreterTest, UndoCommand) { 140 Args ExtraArgs = {"-Xclang", "-diagnostic-log-file", "-Xclang", "-"}; 141 142 // Create the diagnostic engine with unowned consumer. 143 std::string DiagnosticOutput; 144 llvm::raw_string_ostream DiagnosticsOS(DiagnosticOutput); 145 auto DiagPrinter = std::make_unique<TextDiagnosticPrinter>( 146 DiagnosticsOS, new DiagnosticOptions()); 147 148 auto Interp = createInterpreter(ExtraArgs, DiagPrinter.get()); 149 150 // Fail to undo. 151 auto Err1 = Interp->Undo(); 152 EXPECT_EQ("Operation failed. Too many undos", 153 llvm::toString(std::move(Err1))); 154 auto Err2 = Interp->Parse("int foo = 42;"); 155 EXPECT_TRUE(!!Err2); 156 auto Err3 = Interp->Undo(2); 157 EXPECT_EQ("Operation failed. Too many undos", 158 llvm::toString(std::move(Err3))); 159 160 // Succeed to undo. 161 auto Err4 = Interp->Parse("int x = 42;"); 162 EXPECT_TRUE(!!Err4); 163 auto Err5 = Interp->Undo(); 164 EXPECT_FALSE(Err5); 165 auto Err6 = Interp->Parse("int x = 24;"); 166 EXPECT_TRUE(!!Err6); 167 auto Err7 = Interp->Parse("#define X 42"); 168 EXPECT_TRUE(!!Err7); 169 auto Err8 = Interp->Undo(); 170 EXPECT_FALSE(Err8); 171 auto Err9 = Interp->Parse("#define X 24"); 172 EXPECT_TRUE(!!Err9); 173 174 // Undo input contains errors. 175 auto Err10 = Interp->Parse("int y = ;"); 176 EXPECT_FALSE(!!Err10); 177 EXPECT_EQ("Parsing failed.", llvm::toString(Err10.takeError())); 178 auto Err11 = Interp->Parse("int y = 42;"); 179 EXPECT_TRUE(!!Err11); 180 auto Err12 = Interp->Undo(); 181 EXPECT_FALSE(Err12); 182 } 183 184 static std::string MangleName(NamedDecl *ND) { 185 ASTContext &C = ND->getASTContext(); 186 std::unique_ptr<MangleContext> MangleC(C.createMangleContext()); 187 std::string mangledName; 188 llvm::raw_string_ostream RawStr(mangledName); 189 MangleC->mangleName(ND, RawStr); 190 return RawStr.str(); 191 } 192 193 static bool HostSupportsJit() { 194 auto J = llvm::orc::LLJITBuilder().create(); 195 if (J) 196 return true; 197 LLVMConsumeError(llvm::wrap(J.takeError())); 198 return false; 199 } 200 201 struct LLVMInitRAII { 202 LLVMInitRAII() { 203 llvm::InitializeNativeTarget(); 204 llvm::InitializeNativeTargetAsmPrinter(); 205 } 206 ~LLVMInitRAII() { llvm::llvm_shutdown(); } 207 } LLVMInit; 208 209 #ifdef CLANG_INTERPRETER_NO_SUPPORT_EXEC 210 TEST(IncrementalProcessing, DISABLED_FindMangledNameSymbol) { 211 #else 212 TEST(IncrementalProcessing, FindMangledNameSymbol) { 213 #endif 214 215 std::unique_ptr<Interpreter> Interp = createInterpreter(); 216 217 auto &PTU(cantFail(Interp->Parse("int f(const char*) {return 0;}"))); 218 EXPECT_EQ(1U, DeclsSize(PTU.TUPart)); 219 auto R1DeclRange = PTU.TUPart->decls(); 220 221 // We cannot execute on the platform. 222 if (!HostSupportsJit()) { 223 return; 224 } 225 226 NamedDecl *FD = cast<FunctionDecl>(*R1DeclRange.begin()); 227 // Lower the PTU 228 if (llvm::Error Err = Interp->Execute(PTU)) { 229 // We cannot execute on the platform. 230 consumeError(std::move(Err)); 231 return; 232 } 233 234 std::string MangledName = MangleName(FD); 235 auto Addr = Interp->getSymbolAddress(MangledName); 236 EXPECT_FALSE(!Addr); 237 EXPECT_NE(0U, Addr->getValue()); 238 GlobalDecl GD(FD); 239 EXPECT_EQ(*Addr, cantFail(Interp->getSymbolAddress(GD))); 240 cantFail( 241 Interp->ParseAndExecute("extern \"C\" int printf(const char*,...);")); 242 Addr = Interp->getSymbolAddress("printf"); 243 EXPECT_FALSE(!Addr); 244 245 // FIXME: Re-enable when we investigate the way we handle dllimports on Win. 246 #ifndef _WIN32 247 EXPECT_EQ((uintptr_t)&printf, Addr->getValue()); 248 #endif // _WIN32 249 } 250 251 static void *AllocateObject(TypeDecl *TD, Interpreter &Interp) { 252 std::string Name = TD->getQualifiedNameAsString(); 253 const clang::Type *RDTy = TD->getTypeForDecl(); 254 clang::ASTContext &C = Interp.getCompilerInstance()->getASTContext(); 255 size_t Size = C.getTypeSize(RDTy); 256 void *Addr = malloc(Size); 257 258 // Tell the interpreter to call the default ctor with this memory. Synthesize: 259 // new (loc) ClassName; 260 static unsigned Counter = 0; 261 std::stringstream SS; 262 SS << "auto _v" << Counter++ << " = " 263 << "new ((void*)" 264 // Windows needs us to prefix the hexadecimal value of a pointer with '0x'. 265 << std::hex << std::showbase << (size_t)Addr << ")" << Name << "();"; 266 267 auto R = Interp.ParseAndExecute(SS.str()); 268 if (!R) { 269 free(Addr); 270 return nullptr; 271 } 272 273 return Addr; 274 } 275 276 static NamedDecl *LookupSingleName(Interpreter &Interp, const char *Name) { 277 Sema &SemaRef = Interp.getCompilerInstance()->getSema(); 278 ASTContext &C = SemaRef.getASTContext(); 279 DeclarationName DeclName = &C.Idents.get(Name); 280 LookupResult R(SemaRef, DeclName, SourceLocation(), Sema::LookupOrdinaryName); 281 SemaRef.LookupName(R, SemaRef.TUScope); 282 assert(!R.empty()); 283 return R.getFoundDecl(); 284 } 285 286 #ifdef CLANG_INTERPRETER_NO_SUPPORT_EXEC 287 TEST(IncrementalProcessing, DISABLED_InstantiateTemplate) { 288 #else 289 TEST(IncrementalProcessing, InstantiateTemplate) { 290 #endif 291 // FIXME: We cannot yet handle delayed template parsing. If we run with 292 // -fdelayed-template-parsing we try adding the newly created decl to the 293 // active PTU which causes an assert. 294 std::vector<const char *> Args = {"-fno-delayed-template-parsing"}; 295 std::unique_ptr<Interpreter> Interp = createInterpreter(Args); 296 297 llvm::cantFail(Interp->Parse("extern \"C\" int printf(const char*,...);" 298 "class A {};" 299 "struct B {" 300 " template<typename T>" 301 " static int callme(T) { return 42; }" 302 "};")); 303 auto &PTU = llvm::cantFail(Interp->Parse("auto _t = &B::callme<A*>;")); 304 auto PTUDeclRange = PTU.TUPart->decls(); 305 EXPECT_EQ(1, std::distance(PTUDeclRange.begin(), PTUDeclRange.end())); 306 307 // We cannot execute on the platform. 308 if (!HostSupportsJit()) { 309 return; 310 } 311 312 // Lower the PTU 313 if (llvm::Error Err = Interp->Execute(PTU)) { 314 // We cannot execute on the platform. 315 consumeError(std::move(Err)); 316 return; 317 } 318 319 TypeDecl *TD = cast<TypeDecl>(LookupSingleName(*Interp, "A")); 320 void *NewA = AllocateObject(TD, *Interp); 321 322 // Find back the template specialization 323 VarDecl *VD = static_cast<VarDecl *>(*PTUDeclRange.begin()); 324 UnaryOperator *UO = llvm::cast<UnaryOperator>(VD->getInit()); 325 NamedDecl *TmpltSpec = llvm::cast<DeclRefExpr>(UO->getSubExpr())->getDecl(); 326 327 std::string MangledName = MangleName(TmpltSpec); 328 typedef int (*TemplateSpecFn)(void *); 329 auto fn = 330 cantFail(Interp->getSymbolAddress(MangledName)).toPtr<TemplateSpecFn>(); 331 EXPECT_EQ(42, fn(NewA)); 332 free(NewA); 333 } 334 335 #ifdef CLANG_INTERPRETER_NO_SUPPORT_EXEC 336 TEST(InterpreterTest, DISABLED_Value) { 337 #else 338 TEST(InterpreterTest, Value) { 339 #endif 340 // We cannot execute on the platform. 341 if (!HostSupportsJit()) 342 return; 343 344 std::unique_ptr<Interpreter> Interp = createInterpreter(); 345 346 Value V1; 347 llvm::cantFail(Interp->ParseAndExecute("int x = 42;")); 348 llvm::cantFail(Interp->ParseAndExecute("x", &V1)); 349 EXPECT_TRUE(V1.isValid()); 350 EXPECT_TRUE(V1.hasValue()); 351 EXPECT_EQ(V1.getInt(), 42); 352 EXPECT_EQ(V1.convertTo<int>(), 42); 353 EXPECT_TRUE(V1.getType()->isIntegerType()); 354 EXPECT_EQ(V1.getKind(), Value::K_Int); 355 EXPECT_FALSE(V1.isManuallyAlloc()); 356 357 Value V2; 358 llvm::cantFail(Interp->ParseAndExecute("double y = 3.14;")); 359 llvm::cantFail(Interp->ParseAndExecute("y", &V2)); 360 EXPECT_TRUE(V2.isValid()); 361 EXPECT_TRUE(V2.hasValue()); 362 EXPECT_EQ(V2.getDouble(), 3.14); 363 EXPECT_EQ(V2.convertTo<double>(), 3.14); 364 EXPECT_TRUE(V2.getType()->isFloatingType()); 365 EXPECT_EQ(V2.getKind(), Value::K_Double); 366 EXPECT_FALSE(V2.isManuallyAlloc()); 367 368 Value V3; 369 llvm::cantFail(Interp->ParseAndExecute( 370 "struct S { int* p; S() { p = new int(42); } ~S() { delete p; }};")); 371 llvm::cantFail(Interp->ParseAndExecute("S{}", &V3)); 372 EXPECT_TRUE(V3.isValid()); 373 EXPECT_TRUE(V3.hasValue()); 374 EXPECT_TRUE(V3.getType()->isRecordType()); 375 EXPECT_EQ(V3.getKind(), Value::K_PtrOrObj); 376 EXPECT_TRUE(V3.isManuallyAlloc()); 377 378 Value V4; 379 llvm::cantFail(Interp->ParseAndExecute("int getGlobal();")); 380 llvm::cantFail(Interp->ParseAndExecute("void setGlobal(int);")); 381 llvm::cantFail(Interp->ParseAndExecute("getGlobal()", &V4)); 382 EXPECT_EQ(V4.getInt(), 42); 383 EXPECT_TRUE(V4.getType()->isIntegerType()); 384 385 Value V5; 386 // Change the global from the compiled code. 387 setGlobal(43); 388 llvm::cantFail(Interp->ParseAndExecute("getGlobal()", &V5)); 389 EXPECT_EQ(V5.getInt(), 43); 390 EXPECT_TRUE(V5.getType()->isIntegerType()); 391 392 // Change the global from the interpreted code. 393 llvm::cantFail(Interp->ParseAndExecute("setGlobal(44);")); 394 EXPECT_EQ(getGlobal(), 44); 395 396 Value V6; 397 llvm::cantFail(Interp->ParseAndExecute("void foo() {}")); 398 llvm::cantFail(Interp->ParseAndExecute("foo()", &V6)); 399 EXPECT_TRUE(V6.isValid()); 400 EXPECT_FALSE(V6.hasValue()); 401 EXPECT_TRUE(V6.getType()->isVoidType()); 402 EXPECT_EQ(V6.getKind(), Value::K_Void); 403 EXPECT_FALSE(V2.isManuallyAlloc()); 404 405 Value V7; 406 llvm::cantFail(Interp->ParseAndExecute("foo", &V7)); 407 EXPECT_TRUE(V7.isValid()); 408 EXPECT_TRUE(V7.hasValue()); 409 EXPECT_TRUE(V7.getType()->isFunctionProtoType()); 410 EXPECT_EQ(V7.getKind(), Value::K_PtrOrObj); 411 EXPECT_FALSE(V7.isManuallyAlloc()); 412 413 Value V8; 414 llvm::cantFail(Interp->ParseAndExecute("struct SS{ void f() {} };")); 415 llvm::cantFail(Interp->ParseAndExecute("&SS::f", &V8)); 416 EXPECT_TRUE(V8.isValid()); 417 EXPECT_TRUE(V8.hasValue()); 418 EXPECT_TRUE(V8.getType()->isMemberFunctionPointerType()); 419 EXPECT_EQ(V8.getKind(), Value::K_PtrOrObj); 420 EXPECT_TRUE(V8.isManuallyAlloc()); 421 422 Value V9; 423 llvm::cantFail(Interp->ParseAndExecute("struct A { virtual int f(); };")); 424 llvm::cantFail( 425 Interp->ParseAndExecute("struct B : A { int f() { return 42; }};")); 426 llvm::cantFail(Interp->ParseAndExecute("int (B::*ptr)() = &B::f;")); 427 llvm::cantFail(Interp->ParseAndExecute("ptr", &V9)); 428 EXPECT_TRUE(V9.isValid()); 429 EXPECT_TRUE(V9.hasValue()); 430 EXPECT_TRUE(V9.getType()->isMemberFunctionPointerType()); 431 EXPECT_EQ(V9.getKind(), Value::K_PtrOrObj); 432 EXPECT_TRUE(V9.isManuallyAlloc()); 433 } 434 } // end anonymous namespace 435