1 //===-- ExecutionEngine.cpp - Common Implementation shared by EEs ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the common interface used by the various execution engine
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "jit"
16 #include "llvm/ExecutionEngine/ExecutionEngine.h"
18 #include "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/Module.h"
21 #include "llvm/ExecutionEngine/GenericValue.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/ADT/Statistic.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/MutexGuard.h"
27 #include "llvm/Support/ValueHandle.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/System/DynamicLibrary.h"
30 #include "llvm/System/Host.h"
31 #include "llvm/Target/TargetData.h"
36 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
37 STATISTIC(NumGlobals , "Number of global vars initialized");
39 ExecutionEngine *(*ExecutionEngine::JITCtor)(
41 std::string *ErrorStr,
42 JITMemoryManager *JMM,
43 CodeGenOpt::Level OptLevel,
48 const SmallVectorImpl<std::string>& MAttrs) = 0;
49 ExecutionEngine *(*ExecutionEngine::InterpCtor)(Module *M,
50 std::string *ErrorStr) = 0;
52 ExecutionEngine::ExecutionEngine(Module *M)
54 LazyFunctionCreator(0),
55 ExceptionTableRegister(0),
56 ExceptionTableDeregister(0) {
57 CompilingLazily = false;
58 GVCompilationDisabled = false;
59 SymbolSearchingDisabled = false;
61 assert(M && "Module is null?");
64 ExecutionEngine::~ExecutionEngine() {
65 clearAllGlobalMappings();
66 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
70 void ExecutionEngine::DeregisterAllTables() {
71 if (ExceptionTableDeregister) {
72 for (std::vector<void*>::iterator it = AllExceptionTables.begin(),
73 ie = AllExceptionTables.end(); it != ie; ++it)
74 ExceptionTableDeregister(*it);
75 AllExceptionTables.clear();
80 /// \brief Helper class which uses a value handler to automatically deletes the
81 /// memory block when the GlobalVariable is destroyed.
82 class GVMemoryBlock : public CallbackVH {
83 GVMemoryBlock(const GlobalVariable *GV)
84 : CallbackVH(const_cast<GlobalVariable*>(GV)) {}
87 /// \brief Returns the address the GlobalVariable should be written into. The
88 /// GVMemoryBlock object prefixes that.
89 static char *Create(const GlobalVariable *GV, const TargetData& TD) {
90 const Type *ElTy = GV->getType()->getElementType();
91 size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
92 void *RawMemory = ::operator new(
93 TargetData::RoundUpAlignment(sizeof(GVMemoryBlock),
94 TD.getPreferredAlignment(GV))
96 new(RawMemory) GVMemoryBlock(GV);
97 return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
100 virtual void deleted() {
101 // We allocated with operator new and with some extra memory hanging off the
102 // end, so don't just delete this. I'm not sure if this is actually
104 this->~GVMemoryBlock();
105 ::operator delete(this);
108 } // anonymous namespace
110 char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
111 return GVMemoryBlock::Create(GV, *getTargetData());
114 bool ExecutionEngine::removeModule(Module *M) {
115 for(SmallVector<Module *, 1>::iterator I = Modules.begin(),
116 E = Modules.end(); I != E; ++I) {
120 clearGlobalMappingsFromModule(M);
127 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
128 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
129 if (Function *F = Modules[i]->getFunction(FnName))
136 void *ExecutionEngineState::RemoveMapping(const MutexGuard &,
137 const GlobalValue *ToUnmap) {
138 GlobalAddressMapTy::iterator I = GlobalAddressMap.find(ToUnmap);
141 // FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
143 if (I == GlobalAddressMap.end())
147 GlobalAddressMap.erase(I);
150 GlobalAddressReverseMap.erase(OldVal);
154 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
155 MutexGuard locked(lock);
157 DEBUG(dbgs() << "JIT: Map \'" << GV->getName()
158 << "\' to [" << Addr << "]\n";);
159 void *&CurVal = EEState.getGlobalAddressMap(locked)[GV];
160 assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
163 // If we are using the reverse mapping, add it too.
164 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
165 AssertingVH<const GlobalValue> &V =
166 EEState.getGlobalAddressReverseMap(locked)[Addr];
167 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
172 void ExecutionEngine::clearAllGlobalMappings() {
173 MutexGuard locked(lock);
175 EEState.getGlobalAddressMap(locked).clear();
176 EEState.getGlobalAddressReverseMap(locked).clear();
179 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
180 MutexGuard locked(lock);
182 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
183 EEState.RemoveMapping(locked, FI);
184 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
186 EEState.RemoveMapping(locked, GI);
189 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
190 MutexGuard locked(lock);
192 ExecutionEngineState::GlobalAddressMapTy &Map =
193 EEState.getGlobalAddressMap(locked);
195 // Deleting from the mapping?
197 return EEState.RemoveMapping(locked, GV);
199 void *&CurVal = Map[GV];
200 void *OldVal = CurVal;
202 if (CurVal && !EEState.getGlobalAddressReverseMap(locked).empty())
203 EEState.getGlobalAddressReverseMap(locked).erase(CurVal);
206 // If we are using the reverse mapping, add it too.
207 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
208 AssertingVH<const GlobalValue> &V =
209 EEState.getGlobalAddressReverseMap(locked)[Addr];
210 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
216 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
217 MutexGuard locked(lock);
219 ExecutionEngineState::GlobalAddressMapTy::iterator I =
220 EEState.getGlobalAddressMap(locked).find(GV);
221 return I != EEState.getGlobalAddressMap(locked).end() ? I->second : 0;
224 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
225 MutexGuard locked(lock);
227 // If we haven't computed the reverse mapping yet, do so first.
228 if (EEState.getGlobalAddressReverseMap(locked).empty()) {
229 for (ExecutionEngineState::GlobalAddressMapTy::iterator
230 I = EEState.getGlobalAddressMap(locked).begin(),
231 E = EEState.getGlobalAddressMap(locked).end(); I != E; ++I)
232 EEState.getGlobalAddressReverseMap(locked).insert(std::make_pair(
233 I->second, I->first));
236 std::map<void *, AssertingVH<const GlobalValue> >::iterator I =
237 EEState.getGlobalAddressReverseMap(locked).find(Addr);
238 return I != EEState.getGlobalAddressReverseMap(locked).end() ? I->second : 0;
244 std::vector<char*> Values;
246 ArgvArray() : Array(NULL) {}
247 ~ArgvArray() { clear(); }
251 for (size_t I = 0, E = Values.size(); I != E; ++I) {
256 /// Turn a vector of strings into a nice argv style array of pointers to null
257 /// terminated strings.
258 void *reset(LLVMContext &C, ExecutionEngine *EE,
259 const std::vector<std::string> &InputArgv);
261 } // anonymous namespace
262 void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
263 const std::vector<std::string> &InputArgv) {
264 clear(); // Free the old contents.
265 unsigned PtrSize = EE->getTargetData()->getPointerSize();
266 Array = new char[(InputArgv.size()+1)*PtrSize];
268 DEBUG(dbgs() << "JIT: ARGV = " << (void*)Array << "\n");
269 const Type *SBytePtr = Type::getInt8PtrTy(C);
271 for (unsigned i = 0; i != InputArgv.size(); ++i) {
272 unsigned Size = InputArgv[i].size()+1;
273 char *Dest = new char[Size];
274 Values.push_back(Dest);
275 DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void*)Dest << "\n");
277 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
280 // Endian safe: Array[i] = (PointerTy)Dest;
281 EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Array+i*PtrSize),
286 EE->StoreValueToMemory(PTOGV(0),
287 (GenericValue*)(Array+InputArgv.size()*PtrSize),
292 void ExecutionEngine::runStaticConstructorsDestructors(Module *module,
294 const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
295 GlobalVariable *GV = module->getNamedGlobal(Name);
297 // If this global has internal linkage, or if it has a use, then it must be
298 // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
299 // this is the case, don't execute any of the global ctors, __main will do
301 if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
303 // Should be an array of '{ int, void ()* }' structs. The first value is
304 // the init priority, which we ignore.
305 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
306 if (!InitList) return;
307 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
309 dyn_cast<ConstantStruct>(InitList->getOperand(i));
311 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
313 Constant *FP = CS->getOperand(1);
314 if (FP->isNullValue())
315 break; // Found a null terminator, exit.
317 // Strip off constant expression casts.
318 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
320 FP = CE->getOperand(0);
322 // Execute the ctor/dtor function!
323 if (Function *F = dyn_cast<Function>(FP))
324 runFunction(F, std::vector<GenericValue>());
326 // FIXME: It is marginally lame that we just do nothing here if we see an
327 // entry we don't recognize. It might not be unreasonable for the verifier
328 // to not even allow this and just assert here.
332 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
333 // Execute global ctors/dtors for each module in the program.
334 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
335 runStaticConstructorsDestructors(Modules[i], isDtors);
339 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
340 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
341 unsigned PtrSize = EE->getTargetData()->getPointerSize();
342 for (unsigned i = 0; i < PtrSize; ++i)
343 if (*(i + (uint8_t*)Loc))
349 int ExecutionEngine::runFunctionAsMain(Function *Fn,
350 const std::vector<std::string> &argv,
351 const char * const * envp) {
352 std::vector<GenericValue> GVArgs;
354 GVArgc.IntVal = APInt(32, argv.size());
357 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
358 const FunctionType *FTy = Fn->getFunctionType();
359 const Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
361 // Check the argument types.
363 report_fatal_error("Invalid number of arguments of main() supplied");
364 if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
365 report_fatal_error("Invalid type for third argument of main() supplied");
366 if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
367 report_fatal_error("Invalid type for second argument of main() supplied");
368 if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
369 report_fatal_error("Invalid type for first argument of main() supplied");
370 if (!FTy->getReturnType()->isIntegerTy() &&
371 !FTy->getReturnType()->isVoidTy())
372 report_fatal_error("Invalid return type of main() supplied");
377 GVArgs.push_back(GVArgc); // Arg #0 = argc.
380 GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
381 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
382 "argv[0] was null after CreateArgv");
384 std::vector<std::string> EnvVars;
385 for (unsigned i = 0; envp[i]; ++i)
386 EnvVars.push_back(envp[i]);
388 GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
393 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
396 ExecutionEngine *ExecutionEngine::create(Module *M,
397 bool ForceInterpreter,
398 std::string *ErrorStr,
399 CodeGenOpt::Level OptLevel,
401 return EngineBuilder(M)
402 .setEngineKind(ForceInterpreter
403 ? EngineKind::Interpreter
405 .setErrorStr(ErrorStr)
406 .setOptLevel(OptLevel)
407 .setAllocateGVsWithCode(GVsWithCode)
411 ExecutionEngine *EngineBuilder::create() {
412 // Make sure we can resolve symbols in the program as well. The zero arg
413 // to the function tells DynamicLibrary to load the program, not a library.
414 if (sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr))
417 // If the user specified a memory manager but didn't specify which engine to
418 // create, we assume they only want the JIT, and we fail if they only want
421 if (WhichEngine & EngineKind::JIT)
422 WhichEngine = EngineKind::JIT;
425 *ErrorStr = "Cannot create an interpreter with a memory manager.";
430 // Unless the interpreter was explicitly selected or the JIT is not linked,
432 if (WhichEngine & EngineKind::JIT) {
433 if (ExecutionEngine::JITCtor) {
434 ExecutionEngine *EE =
435 ExecutionEngine::JITCtor(M, ErrorStr, JMM, OptLevel,
436 AllocateGVsWithCode, CMModel,
437 MArch, MCPU, MAttrs);
442 // If we can't make a JIT and we didn't request one specifically, try making
443 // an interpreter instead.
444 if (WhichEngine & EngineKind::Interpreter) {
445 if (ExecutionEngine::InterpCtor)
446 return ExecutionEngine::InterpCtor(M, ErrorStr);
448 *ErrorStr = "Interpreter has not been linked in.";
452 if ((WhichEngine & EngineKind::JIT) && ExecutionEngine::JITCtor == 0) {
454 *ErrorStr = "JIT has not been linked in.";
460 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
461 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
462 return getPointerToFunction(F);
464 MutexGuard locked(lock);
465 if (void *P = EEState.getGlobalAddressMap(locked)[GV])
468 // Global variable might have been added since interpreter started.
469 if (GlobalVariable *GVar =
470 const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
471 EmitGlobalVariable(GVar);
473 llvm_unreachable("Global hasn't had an address allocated yet!");
475 return EEState.getGlobalAddressMap(locked)[GV];
478 /// \brief Converts a Constant* into a GenericValue, including handling of
479 /// ConstantExpr values.
480 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
481 // If its undefined, return the garbage.
482 if (isa<UndefValue>(C)) {
484 switch (C->getType()->getTypeID()) {
485 case Type::IntegerTyID:
486 case Type::X86_FP80TyID:
487 case Type::FP128TyID:
488 case Type::PPC_FP128TyID:
489 // Although the value is undefined, we still have to construct an APInt
490 // with the correct bit width.
491 Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
499 // Otherwise, if the value is a ConstantExpr...
500 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
501 Constant *Op0 = CE->getOperand(0);
502 switch (CE->getOpcode()) {
503 case Instruction::GetElementPtr: {
505 GenericValue Result = getConstantValue(Op0);
506 SmallVector<Value*, 8> Indices(CE->op_begin()+1, CE->op_end());
508 TD->getIndexedOffset(Op0->getType(), &Indices[0], Indices.size());
510 char* tmp = (char*) Result.PointerVal;
511 Result = PTOGV(tmp + Offset);
514 case Instruction::Trunc: {
515 GenericValue GV = getConstantValue(Op0);
516 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
517 GV.IntVal = GV.IntVal.trunc(BitWidth);
520 case Instruction::ZExt: {
521 GenericValue GV = getConstantValue(Op0);
522 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
523 GV.IntVal = GV.IntVal.zext(BitWidth);
526 case Instruction::SExt: {
527 GenericValue GV = getConstantValue(Op0);
528 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
529 GV.IntVal = GV.IntVal.sext(BitWidth);
532 case Instruction::FPTrunc: {
534 GenericValue GV = getConstantValue(Op0);
535 GV.FloatVal = float(GV.DoubleVal);
538 case Instruction::FPExt:{
540 GenericValue GV = getConstantValue(Op0);
541 GV.DoubleVal = double(GV.FloatVal);
544 case Instruction::UIToFP: {
545 GenericValue GV = getConstantValue(Op0);
546 if (CE->getType()->isFloatTy())
547 GV.FloatVal = float(GV.IntVal.roundToDouble());
548 else if (CE->getType()->isDoubleTy())
549 GV.DoubleVal = GV.IntVal.roundToDouble();
550 else if (CE->getType()->isX86_FP80Ty()) {
551 const uint64_t zero[] = {0, 0};
552 APFloat apf = APFloat(APInt(80, 2, zero));
553 (void)apf.convertFromAPInt(GV.IntVal,
555 APFloat::rmNearestTiesToEven);
556 GV.IntVal = apf.bitcastToAPInt();
560 case Instruction::SIToFP: {
561 GenericValue GV = getConstantValue(Op0);
562 if (CE->getType()->isFloatTy())
563 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
564 else if (CE->getType()->isDoubleTy())
565 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
566 else if (CE->getType()->isX86_FP80Ty()) {
567 const uint64_t zero[] = { 0, 0};
568 APFloat apf = APFloat(APInt(80, 2, zero));
569 (void)apf.convertFromAPInt(GV.IntVal,
571 APFloat::rmNearestTiesToEven);
572 GV.IntVal = apf.bitcastToAPInt();
576 case Instruction::FPToUI: // double->APInt conversion handles sign
577 case Instruction::FPToSI: {
578 GenericValue GV = getConstantValue(Op0);
579 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
580 if (Op0->getType()->isFloatTy())
581 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
582 else if (Op0->getType()->isDoubleTy())
583 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
584 else if (Op0->getType()->isX86_FP80Ty()) {
585 APFloat apf = APFloat(GV.IntVal);
588 (void)apf.convertToInteger(&v, BitWidth,
589 CE->getOpcode()==Instruction::FPToSI,
590 APFloat::rmTowardZero, &ignored);
591 GV.IntVal = v; // endian?
595 case Instruction::PtrToInt: {
596 GenericValue GV = getConstantValue(Op0);
597 uint32_t PtrWidth = TD->getPointerSizeInBits();
598 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
601 case Instruction::IntToPtr: {
602 GenericValue GV = getConstantValue(Op0);
603 uint32_t PtrWidth = TD->getPointerSizeInBits();
604 if (PtrWidth != GV.IntVal.getBitWidth())
605 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
606 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
607 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
610 case Instruction::BitCast: {
611 GenericValue GV = getConstantValue(Op0);
612 const Type* DestTy = CE->getType();
613 switch (Op0->getType()->getTypeID()) {
614 default: llvm_unreachable("Invalid bitcast operand");
615 case Type::IntegerTyID:
616 assert(DestTy->isFloatingPointTy() && "invalid bitcast");
617 if (DestTy->isFloatTy())
618 GV.FloatVal = GV.IntVal.bitsToFloat();
619 else if (DestTy->isDoubleTy())
620 GV.DoubleVal = GV.IntVal.bitsToDouble();
622 case Type::FloatTyID:
623 assert(DestTy->isIntegerTy(32) && "Invalid bitcast");
624 GV.IntVal.floatToBits(GV.FloatVal);
626 case Type::DoubleTyID:
627 assert(DestTy->isIntegerTy(64) && "Invalid bitcast");
628 GV.IntVal.doubleToBits(GV.DoubleVal);
630 case Type::PointerTyID:
631 assert(DestTy->isPointerTy() && "Invalid bitcast");
632 break; // getConstantValue(Op0) above already converted it
636 case Instruction::Add:
637 case Instruction::FAdd:
638 case Instruction::Sub:
639 case Instruction::FSub:
640 case Instruction::Mul:
641 case Instruction::FMul:
642 case Instruction::UDiv:
643 case Instruction::SDiv:
644 case Instruction::URem:
645 case Instruction::SRem:
646 case Instruction::And:
647 case Instruction::Or:
648 case Instruction::Xor: {
649 GenericValue LHS = getConstantValue(Op0);
650 GenericValue RHS = getConstantValue(CE->getOperand(1));
652 switch (CE->getOperand(0)->getType()->getTypeID()) {
653 default: llvm_unreachable("Bad add type!");
654 case Type::IntegerTyID:
655 switch (CE->getOpcode()) {
656 default: llvm_unreachable("Invalid integer opcode");
657 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
658 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
659 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
660 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
661 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
662 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
663 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
664 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
665 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
666 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
669 case Type::FloatTyID:
670 switch (CE->getOpcode()) {
671 default: llvm_unreachable("Invalid float opcode");
672 case Instruction::FAdd:
673 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
674 case Instruction::FSub:
675 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
676 case Instruction::FMul:
677 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
678 case Instruction::FDiv:
679 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
680 case Instruction::FRem:
681 GV.FloatVal = std::fmod(LHS.FloatVal,RHS.FloatVal); break;
684 case Type::DoubleTyID:
685 switch (CE->getOpcode()) {
686 default: llvm_unreachable("Invalid double opcode");
687 case Instruction::FAdd:
688 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
689 case Instruction::FSub:
690 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
691 case Instruction::FMul:
692 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
693 case Instruction::FDiv:
694 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
695 case Instruction::FRem:
696 GV.DoubleVal = std::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
699 case Type::X86_FP80TyID:
700 case Type::PPC_FP128TyID:
701 case Type::FP128TyID: {
702 APFloat apfLHS = APFloat(LHS.IntVal);
703 switch (CE->getOpcode()) {
704 default: llvm_unreachable("Invalid long double opcode");
705 case Instruction::FAdd:
706 apfLHS.add(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
707 GV.IntVal = apfLHS.bitcastToAPInt();
709 case Instruction::FSub:
710 apfLHS.subtract(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
711 GV.IntVal = apfLHS.bitcastToAPInt();
713 case Instruction::FMul:
714 apfLHS.multiply(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
715 GV.IntVal = apfLHS.bitcastToAPInt();
717 case Instruction::FDiv:
718 apfLHS.divide(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
719 GV.IntVal = apfLHS.bitcastToAPInt();
721 case Instruction::FRem:
722 apfLHS.mod(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
723 GV.IntVal = apfLHS.bitcastToAPInt();
735 SmallString<256> Msg;
736 raw_svector_ostream OS(Msg);
737 OS << "ConstantExpr not handled: " << *CE;
738 report_fatal_error(OS.str());
741 // Otherwise, we have a simple constant.
743 switch (C->getType()->getTypeID()) {
744 case Type::FloatTyID:
745 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
747 case Type::DoubleTyID:
748 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
750 case Type::X86_FP80TyID:
751 case Type::FP128TyID:
752 case Type::PPC_FP128TyID:
753 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
755 case Type::IntegerTyID:
756 Result.IntVal = cast<ConstantInt>(C)->getValue();
758 case Type::PointerTyID:
759 if (isa<ConstantPointerNull>(C))
760 Result.PointerVal = 0;
761 else if (const Function *F = dyn_cast<Function>(C))
762 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
763 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
764 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
765 else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C))
766 Result = PTOGV(getPointerToBasicBlock(const_cast<BasicBlock*>(
767 BA->getBasicBlock())));
769 llvm_unreachable("Unknown constant pointer type!");
772 SmallString<256> Msg;
773 raw_svector_ostream OS(Msg);
774 OS << "ERROR: Constant unimplemented for type: " << *C->getType();
775 report_fatal_error(OS.str());
781 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
782 /// with the integer held in IntVal.
783 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
784 unsigned StoreBytes) {
785 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
786 uint8_t *Src = (uint8_t *)IntVal.getRawData();
788 if (sys::isLittleEndianHost()) {
789 // Little-endian host - the source is ordered from LSB to MSB. Order the
790 // destination from LSB to MSB: Do a straight copy.
791 memcpy(Dst, Src, StoreBytes);
793 // Big-endian host - the source is an array of 64 bit words ordered from
794 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
795 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
796 while (StoreBytes > sizeof(uint64_t)) {
797 StoreBytes -= sizeof(uint64_t);
798 // May not be aligned so use memcpy.
799 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
800 Src += sizeof(uint64_t);
803 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
807 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
808 GenericValue *Ptr, const Type *Ty) {
809 const unsigned StoreBytes = getTargetData()->getTypeStoreSize(Ty);
811 switch (Ty->getTypeID()) {
812 case Type::IntegerTyID:
813 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
815 case Type::FloatTyID:
816 *((float*)Ptr) = Val.FloatVal;
818 case Type::DoubleTyID:
819 *((double*)Ptr) = Val.DoubleVal;
821 case Type::X86_FP80TyID:
822 memcpy(Ptr, Val.IntVal.getRawData(), 10);
824 case Type::PointerTyID:
825 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
826 if (StoreBytes != sizeof(PointerTy))
827 memset(Ptr, 0, StoreBytes);
829 *((PointerTy*)Ptr) = Val.PointerVal;
832 dbgs() << "Cannot store value of type " << *Ty << "!\n";
835 if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian())
836 // Host and target are different endian - reverse the stored bytes.
837 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
840 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
841 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
842 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
843 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
844 uint8_t *Dst = (uint8_t *)IntVal.getRawData();
846 if (sys::isLittleEndianHost())
847 // Little-endian host - the destination must be ordered from LSB to MSB.
848 // The source is ordered from LSB to MSB: Do a straight copy.
849 memcpy(Dst, Src, LoadBytes);
851 // Big-endian - the destination is an array of 64 bit words ordered from
852 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
853 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
855 while (LoadBytes > sizeof(uint64_t)) {
856 LoadBytes -= sizeof(uint64_t);
857 // May not be aligned so use memcpy.
858 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
859 Dst += sizeof(uint64_t);
862 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
868 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
871 const unsigned LoadBytes = getTargetData()->getTypeStoreSize(Ty);
873 switch (Ty->getTypeID()) {
874 case Type::IntegerTyID:
875 // An APInt with all words initially zero.
876 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
877 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
879 case Type::FloatTyID:
880 Result.FloatVal = *((float*)Ptr);
882 case Type::DoubleTyID:
883 Result.DoubleVal = *((double*)Ptr);
885 case Type::PointerTyID:
886 Result.PointerVal = *((PointerTy*)Ptr);
888 case Type::X86_FP80TyID: {
889 // This is endian dependent, but it will only work on x86 anyway.
890 // FIXME: Will not trap if loading a signaling NaN.
893 Result.IntVal = APInt(80, 2, y);
897 SmallString<256> Msg;
898 raw_svector_ostream OS(Msg);
899 OS << "Cannot load value of type " << *Ty << "!";
900 report_fatal_error(OS.str());
904 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
905 DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
907 if (isa<UndefValue>(Init)) {
909 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
910 unsigned ElementSize =
911 getTargetData()->getTypeAllocSize(CP->getType()->getElementType());
912 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
913 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
915 } else if (isa<ConstantAggregateZero>(Init)) {
916 memset(Addr, 0, (size_t)getTargetData()->getTypeAllocSize(Init->getType()));
918 } else if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
919 unsigned ElementSize =
920 getTargetData()->getTypeAllocSize(CPA->getType()->getElementType());
921 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
922 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
924 } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
925 const StructLayout *SL =
926 getTargetData()->getStructLayout(cast<StructType>(CPS->getType()));
927 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
928 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
930 } else if (Init->getType()->isFirstClassType()) {
931 GenericValue Val = getConstantValue(Init);
932 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
936 DEBUG(dbgs() << "Bad Type: " << *Init->getType() << "\n");
937 llvm_unreachable("Unknown constant type to initialize memory with!");
940 /// EmitGlobals - Emit all of the global variables to memory, storing their
941 /// addresses into GlobalAddress. This must make sure to copy the contents of
942 /// their initializers into the memory.
943 void ExecutionEngine::emitGlobals() {
944 // Loop over all of the global variables in the program, allocating the memory
945 // to hold them. If there is more than one module, do a prepass over globals
946 // to figure out how the different modules should link together.
947 std::map<std::pair<std::string, const Type*>,
948 const GlobalValue*> LinkedGlobalsMap;
950 if (Modules.size() != 1) {
951 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
952 Module &M = *Modules[m];
953 for (Module::const_global_iterator I = M.global_begin(),
954 E = M.global_end(); I != E; ++I) {
955 const GlobalValue *GV = I;
956 if (GV->hasLocalLinkage() || GV->isDeclaration() ||
957 GV->hasAppendingLinkage() || !GV->hasName())
958 continue;// Ignore external globals and globals with internal linkage.
960 const GlobalValue *&GVEntry =
961 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
963 // If this is the first time we've seen this global, it is the canonical
970 // If the existing global is strong, never replace it.
971 if (GVEntry->hasExternalLinkage() ||
972 GVEntry->hasDLLImportLinkage() ||
973 GVEntry->hasDLLExportLinkage())
976 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
977 // symbol. FIXME is this right for common?
978 if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
984 std::vector<const GlobalValue*> NonCanonicalGlobals;
985 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
986 Module &M = *Modules[m];
987 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
989 // In the multi-module case, see what this global maps to.
990 if (!LinkedGlobalsMap.empty()) {
991 if (const GlobalValue *GVEntry =
992 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())]) {
993 // If something else is the canonical global, ignore this one.
994 if (GVEntry != &*I) {
995 NonCanonicalGlobals.push_back(I);
1001 if (!I->isDeclaration()) {
1002 addGlobalMapping(I, getMemoryForGV(I));
1004 // External variable reference. Try to use the dynamic loader to
1005 // get a pointer to it.
1007 sys::DynamicLibrary::SearchForAddressOfSymbol(I->getName()))
1008 addGlobalMapping(I, SymAddr);
1010 report_fatal_error("Could not resolve external global address: "
1016 // If there are multiple modules, map the non-canonical globals to their
1017 // canonical location.
1018 if (!NonCanonicalGlobals.empty()) {
1019 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
1020 const GlobalValue *GV = NonCanonicalGlobals[i];
1021 const GlobalValue *CGV =
1022 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1023 void *Ptr = getPointerToGlobalIfAvailable(CGV);
1024 assert(Ptr && "Canonical global wasn't codegen'd!");
1025 addGlobalMapping(GV, Ptr);
1029 // Now that all of the globals are set up in memory, loop through them all
1030 // and initialize their contents.
1031 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
1033 if (!I->isDeclaration()) {
1034 if (!LinkedGlobalsMap.empty()) {
1035 if (const GlobalValue *GVEntry =
1036 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())])
1037 if (GVEntry != &*I) // Not the canonical variable.
1040 EmitGlobalVariable(I);
1046 // EmitGlobalVariable - This method emits the specified global variable to the
1047 // address specified in GlobalAddresses, or allocates new memory if it's not
1048 // already in the map.
1049 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1050 void *GA = getPointerToGlobalIfAvailable(GV);
1053 // If it's not already specified, allocate memory for the global.
1054 GA = getMemoryForGV(GV);
1055 addGlobalMapping(GV, GA);
1058 // Don't initialize if it's thread local, let the client do it.
1059 if (!GV->isThreadLocal())
1060 InitializeMemory(GV->getInitializer(), GA);
1062 const Type *ElTy = GV->getType()->getElementType();
1063 size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
1064 NumInitBytes += (unsigned)GVSize;
1068 ExecutionEngineState::ExecutionEngineState(ExecutionEngine &EE)
1069 : EE(EE), GlobalAddressMap(this) {
1073 ExecutionEngineState::AddressMapConfig::getMutex(ExecutionEngineState *EES) {
1074 return &EES->EE.lock;
1077 void ExecutionEngineState::AddressMapConfig::onDelete(ExecutionEngineState *EES,
1078 const GlobalValue *Old) {
1079 void *OldVal = EES->GlobalAddressMap.lookup(Old);
1080 EES->GlobalAddressReverseMap.erase(OldVal);
1083 void ExecutionEngineState::AddressMapConfig::onRAUW(ExecutionEngineState *,
1084 const GlobalValue *,
1085 const GlobalValue *) {
1086 assert(false && "The ExecutionEngine doesn't know how to handle a"
1087 " RAUW on a value it has a global mapping for.");