1 //===-- ExecutionEngineBindings.cpp - C bindings for EEs ------------------===// 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 // This file defines the C bindings for the ExecutionEngine library. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm-c/ExecutionEngine.h" 14 #include "llvm/ExecutionEngine/ExecutionEngine.h" 15 #include "llvm/ExecutionEngine/GenericValue.h" 16 #include "llvm/ExecutionEngine/JITEventListener.h" 17 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h" 18 #include "llvm/IR/DerivedTypes.h" 19 #include "llvm/IR/Module.h" 20 #include "llvm/Support/ErrorHandling.h" 21 #include "llvm/Target/CodeGenCWrappers.h" 22 #include "llvm/Target/TargetOptions.h" 23 #include <cstring> 24 25 using namespace llvm; 26 27 #define DEBUG_TYPE "jit" 28 29 // Wrapping the C bindings types. 30 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(GenericValue, LLVMGenericValueRef) 31 32 33 static LLVMTargetMachineRef wrap(const TargetMachine *P) { 34 return 35 reinterpret_cast<LLVMTargetMachineRef>(const_cast<TargetMachine*>(P)); 36 } 37 38 /*===-- Operations on generic values --------------------------------------===*/ 39 40 LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty, 41 unsigned long long N, 42 LLVMBool IsSigned) { 43 GenericValue *GenVal = new GenericValue(); 44 GenVal->IntVal = APInt(unwrap<IntegerType>(Ty)->getBitWidth(), N, IsSigned); 45 return wrap(GenVal); 46 } 47 48 LLVMGenericValueRef LLVMCreateGenericValueOfPointer(void *P) { 49 GenericValue *GenVal = new GenericValue(); 50 GenVal->PointerVal = P; 51 return wrap(GenVal); 52 } 53 54 LLVMGenericValueRef LLVMCreateGenericValueOfFloat(LLVMTypeRef TyRef, double N) { 55 GenericValue *GenVal = new GenericValue(); 56 switch (unwrap(TyRef)->getTypeID()) { 57 case Type::FloatTyID: 58 GenVal->FloatVal = N; 59 break; 60 case Type::DoubleTyID: 61 GenVal->DoubleVal = N; 62 break; 63 default: 64 llvm_unreachable("LLVMGenericValueToFloat supports only float and double."); 65 } 66 return wrap(GenVal); 67 } 68 69 unsigned LLVMGenericValueIntWidth(LLVMGenericValueRef GenValRef) { 70 return unwrap(GenValRef)->IntVal.getBitWidth(); 71 } 72 73 unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenValRef, 74 LLVMBool IsSigned) { 75 GenericValue *GenVal = unwrap(GenValRef); 76 if (IsSigned) 77 return GenVal->IntVal.getSExtValue(); 78 else 79 return GenVal->IntVal.getZExtValue(); 80 } 81 82 void *LLVMGenericValueToPointer(LLVMGenericValueRef GenVal) { 83 return unwrap(GenVal)->PointerVal; 84 } 85 86 double LLVMGenericValueToFloat(LLVMTypeRef TyRef, LLVMGenericValueRef GenVal) { 87 switch (unwrap(TyRef)->getTypeID()) { 88 case Type::FloatTyID: 89 return unwrap(GenVal)->FloatVal; 90 case Type::DoubleTyID: 91 return unwrap(GenVal)->DoubleVal; 92 default: 93 llvm_unreachable("LLVMGenericValueToFloat supports only float and double."); 94 } 95 } 96 97 void LLVMDisposeGenericValue(LLVMGenericValueRef GenVal) { 98 delete unwrap(GenVal); 99 } 100 101 /*===-- Operations on execution engines -----------------------------------===*/ 102 103 LLVMBool LLVMCreateExecutionEngineForModule(LLVMExecutionEngineRef *OutEE, 104 LLVMModuleRef M, 105 char **OutError) { 106 std::string Error; 107 EngineBuilder builder(std::unique_ptr<Module>(unwrap(M))); 108 builder.setEngineKind(EngineKind::Either) 109 .setErrorStr(&Error); 110 if (ExecutionEngine *EE = builder.create()){ 111 *OutEE = wrap(EE); 112 return 0; 113 } 114 *OutError = strdup(Error.c_str()); 115 return 1; 116 } 117 118 LLVMBool LLVMCreateInterpreterForModule(LLVMExecutionEngineRef *OutInterp, 119 LLVMModuleRef M, 120 char **OutError) { 121 std::string Error; 122 EngineBuilder builder(std::unique_ptr<Module>(unwrap(M))); 123 builder.setEngineKind(EngineKind::Interpreter) 124 .setErrorStr(&Error); 125 if (ExecutionEngine *Interp = builder.create()) { 126 *OutInterp = wrap(Interp); 127 return 0; 128 } 129 *OutError = strdup(Error.c_str()); 130 return 1; 131 } 132 133 LLVMBool LLVMCreateJITCompilerForModule(LLVMExecutionEngineRef *OutJIT, 134 LLVMModuleRef M, 135 unsigned OptLevel, 136 char **OutError) { 137 std::string Error; 138 EngineBuilder builder(std::unique_ptr<Module>(unwrap(M))); 139 builder.setEngineKind(EngineKind::JIT) 140 .setErrorStr(&Error) 141 .setOptLevel((CodeGenOpt::Level)OptLevel); 142 if (ExecutionEngine *JIT = builder.create()) { 143 *OutJIT = wrap(JIT); 144 return 0; 145 } 146 *OutError = strdup(Error.c_str()); 147 return 1; 148 } 149 150 void LLVMInitializeMCJITCompilerOptions(LLVMMCJITCompilerOptions *PassedOptions, 151 size_t SizeOfPassedOptions) { 152 LLVMMCJITCompilerOptions options; 153 memset(&options, 0, sizeof(options)); // Most fields are zero by default. 154 options.CodeModel = LLVMCodeModelJITDefault; 155 156 memcpy(PassedOptions, &options, 157 std::min(sizeof(options), SizeOfPassedOptions)); 158 } 159 160 LLVMBool LLVMCreateMCJITCompilerForModule( 161 LLVMExecutionEngineRef *OutJIT, LLVMModuleRef M, 162 LLVMMCJITCompilerOptions *PassedOptions, size_t SizeOfPassedOptions, 163 char **OutError) { 164 LLVMMCJITCompilerOptions options; 165 // If the user passed a larger sized options struct, then they were compiled 166 // against a newer LLVM. Tell them that something is wrong. 167 if (SizeOfPassedOptions > sizeof(options)) { 168 *OutError = strdup( 169 "Refusing to use options struct that is larger than my own; assuming " 170 "LLVM library mismatch."); 171 return 1; 172 } 173 174 // Defend against the user having an old version of the API by ensuring that 175 // any fields they didn't see are cleared. We must defend against fields being 176 // set to the bitwise equivalent of zero, and assume that this means "do the 177 // default" as if that option hadn't been available. 178 LLVMInitializeMCJITCompilerOptions(&options, sizeof(options)); 179 memcpy(&options, PassedOptions, SizeOfPassedOptions); 180 181 TargetOptions targetOptions; 182 targetOptions.EnableFastISel = options.EnableFastISel; 183 std::unique_ptr<Module> Mod(unwrap(M)); 184 185 if (Mod) 186 // Set function attribute "no-frame-pointer-elim" based on 187 // NoFramePointerElim. 188 for (auto &F : *Mod) { 189 auto Attrs = F.getAttributes(); 190 StringRef Value(options.NoFramePointerElim ? "true" : "false"); 191 Attrs = Attrs.addAttribute(F.getContext(), AttributeList::FunctionIndex, 192 "no-frame-pointer-elim", Value); 193 F.setAttributes(Attrs); 194 } 195 196 std::string Error; 197 EngineBuilder builder(std::move(Mod)); 198 builder.setEngineKind(EngineKind::JIT) 199 .setErrorStr(&Error) 200 .setOptLevel((CodeGenOpt::Level)options.OptLevel) 201 .setTargetOptions(targetOptions); 202 bool JIT; 203 if (Optional<CodeModel::Model> CM = unwrap(options.CodeModel, JIT)) 204 builder.setCodeModel(*CM); 205 if (options.MCJMM) 206 builder.setMCJITMemoryManager( 207 std::unique_ptr<RTDyldMemoryManager>(unwrap(options.MCJMM))); 208 if (ExecutionEngine *JIT = builder.create()) { 209 *OutJIT = wrap(JIT); 210 return 0; 211 } 212 *OutError = strdup(Error.c_str()); 213 return 1; 214 } 215 216 void LLVMDisposeExecutionEngine(LLVMExecutionEngineRef EE) { 217 delete unwrap(EE); 218 } 219 220 void LLVMRunStaticConstructors(LLVMExecutionEngineRef EE) { 221 unwrap(EE)->finalizeObject(); 222 unwrap(EE)->runStaticConstructorsDestructors(false); 223 } 224 225 void LLVMRunStaticDestructors(LLVMExecutionEngineRef EE) { 226 unwrap(EE)->finalizeObject(); 227 unwrap(EE)->runStaticConstructorsDestructors(true); 228 } 229 230 int LLVMRunFunctionAsMain(LLVMExecutionEngineRef EE, LLVMValueRef F, 231 unsigned ArgC, const char * const *ArgV, 232 const char * const *EnvP) { 233 unwrap(EE)->finalizeObject(); 234 235 std::vector<std::string> ArgVec(ArgV, ArgV + ArgC); 236 return unwrap(EE)->runFunctionAsMain(unwrap<Function>(F), ArgVec, EnvP); 237 } 238 239 LLVMGenericValueRef LLVMRunFunction(LLVMExecutionEngineRef EE, LLVMValueRef F, 240 unsigned NumArgs, 241 LLVMGenericValueRef *Args) { 242 unwrap(EE)->finalizeObject(); 243 244 std::vector<GenericValue> ArgVec; 245 ArgVec.reserve(NumArgs); 246 for (unsigned I = 0; I != NumArgs; ++I) 247 ArgVec.push_back(*unwrap(Args[I])); 248 249 GenericValue *Result = new GenericValue(); 250 *Result = unwrap(EE)->runFunction(unwrap<Function>(F), ArgVec); 251 return wrap(Result); 252 } 253 254 void LLVMFreeMachineCodeForFunction(LLVMExecutionEngineRef EE, LLVMValueRef F) { 255 } 256 257 void LLVMAddModule(LLVMExecutionEngineRef EE, LLVMModuleRef M){ 258 unwrap(EE)->addModule(std::unique_ptr<Module>(unwrap(M))); 259 } 260 261 LLVMBool LLVMRemoveModule(LLVMExecutionEngineRef EE, LLVMModuleRef M, 262 LLVMModuleRef *OutMod, char **OutError) { 263 Module *Mod = unwrap(M); 264 unwrap(EE)->removeModule(Mod); 265 *OutMod = wrap(Mod); 266 return 0; 267 } 268 269 LLVMBool LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name, 270 LLVMValueRef *OutFn) { 271 if (Function *F = unwrap(EE)->FindFunctionNamed(Name)) { 272 *OutFn = wrap(F); 273 return 0; 274 } 275 return 1; 276 } 277 278 void *LLVMRecompileAndRelinkFunction(LLVMExecutionEngineRef EE, 279 LLVMValueRef Fn) { 280 return nullptr; 281 } 282 283 LLVMTargetDataRef LLVMGetExecutionEngineTargetData(LLVMExecutionEngineRef EE) { 284 return wrap(&unwrap(EE)->getDataLayout()); 285 } 286 287 LLVMTargetMachineRef 288 LLVMGetExecutionEngineTargetMachine(LLVMExecutionEngineRef EE) { 289 return wrap(unwrap(EE)->getTargetMachine()); 290 } 291 292 void LLVMAddGlobalMapping(LLVMExecutionEngineRef EE, LLVMValueRef Global, 293 void* Addr) { 294 unwrap(EE)->addGlobalMapping(unwrap<GlobalValue>(Global), Addr); 295 } 296 297 void *LLVMGetPointerToGlobal(LLVMExecutionEngineRef EE, LLVMValueRef Global) { 298 unwrap(EE)->finalizeObject(); 299 300 return unwrap(EE)->getPointerToGlobal(unwrap<GlobalValue>(Global)); 301 } 302 303 uint64_t LLVMGetGlobalValueAddress(LLVMExecutionEngineRef EE, const char *Name) { 304 return unwrap(EE)->getGlobalValueAddress(Name); 305 } 306 307 uint64_t LLVMGetFunctionAddress(LLVMExecutionEngineRef EE, const char *Name) { 308 return unwrap(EE)->getFunctionAddress(Name); 309 } 310 311 /*===-- Operations on memory managers -------------------------------------===*/ 312 313 namespace { 314 315 struct SimpleBindingMMFunctions { 316 LLVMMemoryManagerAllocateCodeSectionCallback AllocateCodeSection; 317 LLVMMemoryManagerAllocateDataSectionCallback AllocateDataSection; 318 LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory; 319 LLVMMemoryManagerDestroyCallback Destroy; 320 }; 321 322 class SimpleBindingMemoryManager : public RTDyldMemoryManager { 323 public: 324 SimpleBindingMemoryManager(const SimpleBindingMMFunctions& Functions, 325 void *Opaque); 326 ~SimpleBindingMemoryManager() override; 327 328 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, 329 unsigned SectionID, 330 StringRef SectionName) override; 331 332 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, 333 unsigned SectionID, StringRef SectionName, 334 bool isReadOnly) override; 335 336 bool finalizeMemory(std::string *ErrMsg) override; 337 338 private: 339 SimpleBindingMMFunctions Functions; 340 void *Opaque; 341 }; 342 343 SimpleBindingMemoryManager::SimpleBindingMemoryManager( 344 const SimpleBindingMMFunctions& Functions, 345 void *Opaque) 346 : Functions(Functions), Opaque(Opaque) { 347 assert(Functions.AllocateCodeSection && 348 "No AllocateCodeSection function provided!"); 349 assert(Functions.AllocateDataSection && 350 "No AllocateDataSection function provided!"); 351 assert(Functions.FinalizeMemory && 352 "No FinalizeMemory function provided!"); 353 assert(Functions.Destroy && 354 "No Destroy function provided!"); 355 } 356 357 SimpleBindingMemoryManager::~SimpleBindingMemoryManager() { 358 Functions.Destroy(Opaque); 359 } 360 361 uint8_t *SimpleBindingMemoryManager::allocateCodeSection( 362 uintptr_t Size, unsigned Alignment, unsigned SectionID, 363 StringRef SectionName) { 364 return Functions.AllocateCodeSection(Opaque, Size, Alignment, SectionID, 365 SectionName.str().c_str()); 366 } 367 368 uint8_t *SimpleBindingMemoryManager::allocateDataSection( 369 uintptr_t Size, unsigned Alignment, unsigned SectionID, 370 StringRef SectionName, bool isReadOnly) { 371 return Functions.AllocateDataSection(Opaque, Size, Alignment, SectionID, 372 SectionName.str().c_str(), 373 isReadOnly); 374 } 375 376 bool SimpleBindingMemoryManager::finalizeMemory(std::string *ErrMsg) { 377 char *errMsgCString = nullptr; 378 bool result = Functions.FinalizeMemory(Opaque, &errMsgCString); 379 assert((result || !errMsgCString) && 380 "Did not expect an error message if FinalizeMemory succeeded"); 381 if (errMsgCString) { 382 if (ErrMsg) 383 *ErrMsg = errMsgCString; 384 free(errMsgCString); 385 } 386 return result; 387 } 388 389 } // anonymous namespace 390 391 LLVMMCJITMemoryManagerRef LLVMCreateSimpleMCJITMemoryManager( 392 void *Opaque, 393 LLVMMemoryManagerAllocateCodeSectionCallback AllocateCodeSection, 394 LLVMMemoryManagerAllocateDataSectionCallback AllocateDataSection, 395 LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory, 396 LLVMMemoryManagerDestroyCallback Destroy) { 397 398 if (!AllocateCodeSection || !AllocateDataSection || !FinalizeMemory || 399 !Destroy) 400 return nullptr; 401 402 SimpleBindingMMFunctions functions; 403 functions.AllocateCodeSection = AllocateCodeSection; 404 functions.AllocateDataSection = AllocateDataSection; 405 functions.FinalizeMemory = FinalizeMemory; 406 functions.Destroy = Destroy; 407 return wrap(new SimpleBindingMemoryManager(functions, Opaque)); 408 } 409 410 void LLVMDisposeMCJITMemoryManager(LLVMMCJITMemoryManagerRef MM) { 411 delete unwrap(MM); 412 } 413 414 /*===-- JIT Event Listener functions -------------------------------------===*/ 415 416 417 #if !LLVM_USE_INTEL_JITEVENTS 418 LLVMJITEventListenerRef LLVMCreateIntelJITEventListener(void) 419 { 420 return nullptr; 421 } 422 #endif 423 424 #if !LLVM_USE_OPROFILE 425 LLVMJITEventListenerRef LLVMCreateOProfileJITEventListener(void) 426 { 427 return nullptr; 428 } 429 #endif 430 431 #if !LLVM_USE_PERF 432 LLVMJITEventListenerRef LLVMCreatePerfJITEventListener(void) 433 { 434 return nullptr; 435 } 436 #endif 437