-//===-- ExecutionEngine.cpp - Common Implementation shared by EE's --------===//
-//
+//===-- ExecutionEngine.cpp - Common Implementation shared by EEs ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This file defines the common interface used by the various execution engine
// subclasses.
//
//===----------------------------------------------------------------------===//
-#include "ExecutionEngine.h"
-#include "GenericValue.h"
-#include "llvm/DerivedTypes.h"
+#define DEBUG_TYPE "jit"
#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
+#include "llvm/ModuleProvider.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/MutexGuard.h"
+#include "llvm/System/DynamicLibrary.h"
#include "llvm/Target/TargetData.h"
-#include "Support/Statistic.h"
-#include <dlfcn.h>
+using namespace llvm;
+
+STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
+STATISTIC(NumGlobals , "Number of global vars initialized");
+
+ExecutionEngine::EECtorFn ExecutionEngine::JITCtor = 0;
+ExecutionEngine::EECtorFn ExecutionEngine::InterpCtor = 0;
+
+ExecutionEngine::ExecutionEngine(ModuleProvider *P) {
+ LazyCompilationDisabled = false;
+ Modules.push_back(P);
+ assert(P && "ModuleProvider is null?");
+}
+
+ExecutionEngine::ExecutionEngine(Module *M) {
+ LazyCompilationDisabled = false;
+ assert(M && "Module is null?");
+ Modules.push_back(new ExistingModuleProvider(M));
+}
+
+ExecutionEngine::~ExecutionEngine() {
+ for (unsigned i = 0, e = Modules.size(); i != e; ++i)
+ delete Modules[i];
+}
+
+/// FindFunctionNamed - Search all of the active modules to find the one that
+/// defines FnName. This is very slow operation and shouldn't be used for
+/// general code.
+Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
+ for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
+ if (Function *F = Modules[i]->getModule()->getNamedFunction(FnName))
+ return F;
+ }
+ return 0;
+}
-Statistic<> NumInitBytes("lli", "Number of bytes of global vars initialized");
-// getPointerToGlobal - This returns the address of the specified global
-// value. This may involve code generation if it's a function.
+/// addGlobalMapping - Tell the execution engine that the specified global is
+/// at the specified location. This is used internally as functions are JIT'd
+/// and as global variables are laid out in memory. It can and should also be
+/// used by clients of the EE that want to have an LLVM global overlay
+/// existing data in memory.
+void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
+ MutexGuard locked(lock);
+
+ void *&CurVal = state.getGlobalAddressMap(locked)[GV];
+ assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
+ CurVal = Addr;
+
+ // If we are using the reverse mapping, add it too
+ if (!state.getGlobalAddressReverseMap(locked).empty()) {
+ const GlobalValue *&V = state.getGlobalAddressReverseMap(locked)[Addr];
+ assert((V == 0 || GV == 0) && "GlobalMapping already established!");
+ V = GV;
+ }
+}
+
+/// clearAllGlobalMappings - Clear all global mappings and start over again
+/// use in dynamic compilation scenarios when you want to move globals
+void ExecutionEngine::clearAllGlobalMappings() {
+ MutexGuard locked(lock);
+
+ state.getGlobalAddressMap(locked).clear();
+ state.getGlobalAddressReverseMap(locked).clear();
+}
+
+/// updateGlobalMapping - Replace an existing mapping for GV with a new
+/// address. This updates both maps as required. If "Addr" is null, the
+/// entry for the global is removed from the mappings.
+void ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
+ MutexGuard locked(lock);
+
+ // Deleting from the mapping?
+ if (Addr == 0) {
+ state.getGlobalAddressMap(locked).erase(GV);
+ if (!state.getGlobalAddressReverseMap(locked).empty())
+ state.getGlobalAddressReverseMap(locked).erase(Addr);
+ return;
+ }
+
+ void *&CurVal = state.getGlobalAddressMap(locked)[GV];
+ if (CurVal && !state.getGlobalAddressReverseMap(locked).empty())
+ state.getGlobalAddressReverseMap(locked).erase(CurVal);
+ CurVal = Addr;
+
+ // If we are using the reverse mapping, add it too
+ if (!state.getGlobalAddressReverseMap(locked).empty()) {
+ const GlobalValue *&V = state.getGlobalAddressReverseMap(locked)[Addr];
+ assert((V == 0 || GV == 0) && "GlobalMapping already established!");
+ V = GV;
+ }
+}
+
+/// getPointerToGlobalIfAvailable - This returns the address of the specified
+/// global value if it is has already been codegen'd, otherwise it returns null.
+///
+void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
+ MutexGuard locked(lock);
+
+ std::map<const GlobalValue*, void*>::iterator I =
+ state.getGlobalAddressMap(locked).find(GV);
+ return I != state.getGlobalAddressMap(locked).end() ? I->second : 0;
+}
+
+/// getGlobalValueAtAddress - Return the LLVM global value object that starts
+/// at the specified address.
+///
+const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
+ MutexGuard locked(lock);
+
+ // If we haven't computed the reverse mapping yet, do so first.
+ if (state.getGlobalAddressReverseMap(locked).empty()) {
+ for (std::map<const GlobalValue*, void *>::iterator
+ I = state.getGlobalAddressMap(locked).begin(),
+ E = state.getGlobalAddressMap(locked).end(); I != E; ++I)
+ state.getGlobalAddressReverseMap(locked).insert(std::make_pair(I->second,
+ I->first));
+ }
+
+ std::map<void *, const GlobalValue*>::iterator I =
+ state.getGlobalAddressReverseMap(locked).find(Addr);
+ return I != state.getGlobalAddressReverseMap(locked).end() ? I->second : 0;
+}
+
+// CreateArgv - Turn a vector of strings into a nice argv style array of
+// pointers to null terminated strings.
//
+static void *CreateArgv(ExecutionEngine *EE,
+ const std::vector<std::string> &InputArgv) {
+ unsigned PtrSize = EE->getTargetData()->getPointerSize();
+ char *Result = new char[(InputArgv.size()+1)*PtrSize];
+
+ DOUT << "ARGV = " << (void*)Result << "\n";
+ const Type *SBytePtr = PointerType::get(Type::Int8Ty);
+
+ for (unsigned i = 0; i != InputArgv.size(); ++i) {
+ unsigned Size = InputArgv[i].size()+1;
+ char *Dest = new char[Size];
+ DOUT << "ARGV[" << i << "] = " << (void*)Dest << "\n";
+
+ std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
+ Dest[Size-1] = 0;
+
+ // Endian safe: Result[i] = (PointerTy)Dest;
+ EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i*PtrSize),
+ SBytePtr);
+ }
+
+ // Null terminate it
+ EE->StoreValueToMemory(PTOGV(0),
+ (GenericValue*)(Result+InputArgv.size()*PtrSize),
+ SBytePtr);
+ return Result;
+}
+
+
+/// runStaticConstructorsDestructors - This method is used to execute all of
+/// the static constructors or destructors for a program, depending on the
+/// value of isDtors.
+void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
+ const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
+
+ // Execute global ctors/dtors for each module in the program.
+ for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
+ GlobalVariable *GV = Modules[m]->getModule()->getNamedGlobal(Name);
+
+ // If this global has internal linkage, or if it has a use, then it must be
+ // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
+ // this is the case, don't execute any of the global ctors, __main will do
+ // it.
+ if (!GV || GV->isExternal() || GV->hasInternalLinkage()) continue;
+
+ // Should be an array of '{ int, void ()* }' structs. The first value is
+ // the init priority, which we ignore.
+ ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
+ if (!InitList) continue;
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
+ if (ConstantStruct *CS =
+ dyn_cast<ConstantStruct>(InitList->getOperand(i))) {
+ if (CS->getNumOperands() != 2) break; // Not array of 2-element structs.
+
+ Constant *FP = CS->getOperand(1);
+ if (FP->isNullValue())
+ break; // Found a null terminator, exit.
+
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
+ if (CE->isCast())
+ FP = CE->getOperand(0);
+ if (Function *F = dyn_cast<Function>(FP)) {
+ // Execute the ctor/dtor function!
+ runFunction(F, std::vector<GenericValue>());
+ }
+ }
+ }
+}
+
+/// runFunctionAsMain - This is a helper function which wraps runFunction to
+/// handle the common task of starting up main with the specified argc, argv,
+/// and envp parameters.
+int ExecutionEngine::runFunctionAsMain(Function *Fn,
+ const std::vector<std::string> &argv,
+ const char * const * envp) {
+ std::vector<GenericValue> GVArgs;
+ GenericValue GVArgc;
+ GVArgc.Int32Val = argv.size();
+ unsigned NumArgs = Fn->getFunctionType()->getNumParams();
+ if (NumArgs) {
+ GVArgs.push_back(GVArgc); // Arg #0 = argc.
+ if (NumArgs > 1) {
+ GVArgs.push_back(PTOGV(CreateArgv(this, argv))); // Arg #1 = argv.
+ assert(((char **)GVTOP(GVArgs[1]))[0] &&
+ "argv[0] was null after CreateArgv");
+ if (NumArgs > 2) {
+ std::vector<std::string> EnvVars;
+ for (unsigned i = 0; envp[i]; ++i)
+ EnvVars.push_back(envp[i]);
+ GVArgs.push_back(PTOGV(CreateArgv(this, EnvVars))); // Arg #2 = envp.
+ }
+ }
+ }
+ return runFunction(Fn, GVArgs).Int32Val;
+}
+
+/// If possible, create a JIT, unless the caller specifically requests an
+/// Interpreter or there's an error. If even an Interpreter cannot be created,
+/// NULL is returned.
+///
+ExecutionEngine *ExecutionEngine::create(ModuleProvider *MP,
+ bool ForceInterpreter) {
+ ExecutionEngine *EE = 0;
+
+ // Unless the interpreter was explicitly selected, try making a JIT.
+ if (!ForceInterpreter && JITCtor)
+ EE = JITCtor(MP);
+
+ // If we can't make a JIT, make an interpreter instead.
+ if (EE == 0 && InterpCtor)
+ EE = InterpCtor(MP);
+
+ if (EE) {
+ // Make sure we can resolve symbols in the program as well. The zero arg
+ // to the function tells DynamicLibrary to load the program, not a library.
+ try {
+ sys::DynamicLibrary::LoadLibraryPermanently(0);
+ } catch (...) {
+ }
+ }
+
+ return EE;
+}
+
+/// getPointerToGlobal - This returns the address of the specified global
+/// value. This may involve code generation if it's a function.
+///
void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
- if (const Function *F = dyn_cast<Function>(GV))
+ if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
return getPointerToFunction(F);
- assert(GlobalAddress[GV] && "Global hasn't had an address allocated yet?");
- return GlobalAddress[GV];
-}
+ MutexGuard locked(lock);
+ void *p = state.getGlobalAddressMap(locked)[GV];
+ if (p)
+ return p;
+ // Global variable might have been added since interpreter started.
+ if (GlobalVariable *GVar =
+ const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
+ EmitGlobalVariable(GVar);
+ else
+ assert("Global hasn't had an address allocated yet!");
+ return state.getGlobalAddressMap(locked)[GV];
+}
+/// This function converts a Constant* into a GenericValue. The interesting
+/// part is if C is a ConstantExpr.
+/// @brief Get a GenericValue for a Constnat*
GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
+ // Declare the result as garbage.
GenericValue Result;
- if (ConstantExpr *CE = const_cast<ConstantExpr*>(dyn_cast<ConstantExpr>(C)))
+ // If its undefined, return the garbage.
+ if (isa<UndefValue>(C)) return Result;
+
+ // If the value is a ConstantExpr
+ if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
switch (CE->getOpcode()) {
case Instruction::GetElementPtr: {
- Result = getConstantValue(cast<Constant>(CE->getOperand(0)));
+ // Compute the index
+ Result = getConstantValue(CE->getOperand(0));
std::vector<Value*> Indexes(CE->op_begin()+1, CE->op_end());
uint64_t Offset =
TD->getIndexedOffset(CE->getOperand(0)->getType(), Indexes);
-
- Result.LongVal += Offset;
+
+ if (getTargetData()->getPointerSize() == 4)
+ Result.Int32Val += Offset;
+ else
+ Result.Int64Val += Offset;
return Result;
}
-
+ case Instruction::Trunc:
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ break;
+ case Instruction::PtrToInt: {
+ Constant *Op = CE->getOperand(0);
+ GenericValue GV = getConstantValue(Op);
+ return GV;
+ }
+ case Instruction::BitCast: {
+ // Bit casts are no-ops but we can only return the GV of the operand if
+ // they are the same basic type (pointer->pointer, packed->packed, etc.)
+ Constant *Op = CE->getOperand(0);
+ GenericValue GV = getConstantValue(Op);
+ if (Op->getType()->getTypeID() == C->getType()->getTypeID())
+ return GV;
+ break;
+ }
+ case Instruction::IntToPtr: {
+ // IntToPtr casts are just so special. Cast to intptr_t first.
+ Constant *Op = CE->getOperand(0);
+ GenericValue GV = getConstantValue(Op);
+ switch (Op->getType()->getTypeID()) {
+ case Type::Int1TyID: return PTOGV((void*)(uintptr_t)GV.Int1Val);
+ case Type::Int8TyID: return PTOGV((void*)(uintptr_t)GV.Int8Val);
+ case Type::Int16TyID: return PTOGV((void*)(uintptr_t)GV.Int16Val);
+ case Type::Int32TyID: return PTOGV((void*)(uintptr_t)GV.Int32Val);
+ case Type::Int64TyID: return PTOGV((void*)(uintptr_t)GV.Int64Val);
+ default: assert(0 && "Unknown integral type!");
+ }
+ break;
+ }
+ case Instruction::Add:
+ switch (CE->getOperand(0)->getType()->getTypeID()) {
+ default: assert(0 && "Bad add type!"); abort();
+ case Type::Int64TyID:
+ Result.Int64Val = getConstantValue(CE->getOperand(0)).Int64Val +
+ getConstantValue(CE->getOperand(1)).Int64Val;
+ break;
+ case Type::Int32TyID:
+ Result.Int32Val = getConstantValue(CE->getOperand(0)).Int32Val +
+ getConstantValue(CE->getOperand(1)).Int32Val;
+ break;
+ case Type::Int16TyID:
+ Result.Int16Val = getConstantValue(CE->getOperand(0)).Int16Val +
+ getConstantValue(CE->getOperand(1)).Int16Val;
+ break;
+ case Type::Int8TyID:
+ Result.Int8Val = getConstantValue(CE->getOperand(0)).Int8Val +
+ getConstantValue(CE->getOperand(1)).Int8Val;
+ break;
+ case Type::FloatTyID:
+ Result.FloatVal = getConstantValue(CE->getOperand(0)).FloatVal +
+ getConstantValue(CE->getOperand(1)).FloatVal;
+ break;
+ case Type::DoubleTyID:
+ Result.DoubleVal = getConstantValue(CE->getOperand(0)).DoubleVal +
+ getConstantValue(CE->getOperand(1)).DoubleVal;
+ break;
+ }
+ return Result;
default:
- std::cerr << "ConstantExpr not handled as global var init: " << *CE
- << "\n";
- abort();
+ break;
}
+ cerr << "ConstantExpr not handled as global var init: " << *CE << "\n";
+ abort();
+ }
- switch (C->getType()->getPrimitiveID()) {
-#define GET_CONST_VAL(TY, CLASS) \
- case Type::TY##TyID: Result.TY##Val = cast<CLASS>(C)->getValue(); break
- GET_CONST_VAL(Bool , ConstantBool);
- GET_CONST_VAL(UByte , ConstantUInt);
- GET_CONST_VAL(SByte , ConstantSInt);
- GET_CONST_VAL(UShort , ConstantUInt);
- GET_CONST_VAL(Short , ConstantSInt);
- GET_CONST_VAL(UInt , ConstantUInt);
- GET_CONST_VAL(Int , ConstantSInt);
- GET_CONST_VAL(ULong , ConstantUInt);
- GET_CONST_VAL(Long , ConstantSInt);
- GET_CONST_VAL(Float , ConstantFP);
- GET_CONST_VAL(Double , ConstantFP);
+ switch (C->getType()->getTypeID()) {
+#define GET_CONST_VAL(TY, CTY, CLASS, GETMETH) \
+ case Type::TY##TyID: Result.TY##Val = (CTY)cast<CLASS>(C)->GETMETH(); break
+ GET_CONST_VAL(Int1 , bool , ConstantInt, getZExtValue);
+ GET_CONST_VAL(Int8 , unsigned char , ConstantInt, getZExtValue);
+ GET_CONST_VAL(Int16 , unsigned short, ConstantInt, getZExtValue);
+ GET_CONST_VAL(Int32 , unsigned int , ConstantInt, getZExtValue);
+ GET_CONST_VAL(Int64 , uint64_t , ConstantInt, getZExtValue);
+ GET_CONST_VAL(Float , float , ConstantFP, getValue);
+ GET_CONST_VAL(Double, double , ConstantFP, getValue);
#undef GET_CONST_VAL
case Type::PointerTyID:
- if (isa<ConstantPointerNull>(C)) {
+ if (isa<ConstantPointerNull>(C))
Result.PointerVal = 0;
- } else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(C)){
- Result = PTOGV(getPointerToGlobal(CPR->getValue()));
-
- } else {
+ else if (const Function *F = dyn_cast<Function>(C))
+ Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
+ else if (const GlobalVariable* GV = dyn_cast<GlobalVariable>(C))
+ Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
+ else
assert(0 && "Unknown constant pointer type!");
- }
break;
default:
- std::cout << "ERROR: Constant unimp for type: " << C->getType() << "\n";
+ cerr << "ERROR: Constant unimp for type: " << *C->getType() << "\n";
abort();
}
return Result;
}
+/// StoreValueToMemory - Stores the data in Val of type Ty at address Ptr. Ptr
+/// is the address of the memory at which to store Val, cast to GenericValue *.
+/// It is not a pointer to a GenericValue containing the address at which to
+/// store Val.
+///
void ExecutionEngine::StoreValueToMemory(GenericValue Val, GenericValue *Ptr,
- const Type *Ty) {
- if (getTargetData().isLittleEndian()) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID: Ptr->Untyped[0] = Val.UByteVal; break;
- case Type::UShortTyID:
- case Type::ShortTyID: Ptr->Untyped[0] = Val.UShortVal & 255;
- Ptr->Untyped[1] = (Val.UShortVal >> 8) & 255;
+ const Type *Ty) {
+ if (getTargetData()->isLittleEndian()) {
+ switch (Ty->getTypeID()) {
+ case Type::Int1TyID:
+ case Type::Int8TyID: Ptr->Untyped[0] = Val.Int8Val; break;
+ case Type::Int16TyID: Ptr->Untyped[0] = Val.Int16Val & 255;
+ Ptr->Untyped[1] = (Val.Int16Val >> 8) & 255;
break;
Store4BytesLittleEndian:
case Type::FloatTyID:
- case Type::UIntTyID:
- case Type::IntTyID: Ptr->Untyped[0] = Val.UIntVal & 255;
- Ptr->Untyped[1] = (Val.UIntVal >> 8) & 255;
- Ptr->Untyped[2] = (Val.UIntVal >> 16) & 255;
- Ptr->Untyped[3] = (Val.UIntVal >> 24) & 255;
+ case Type::Int32TyID: Ptr->Untyped[0] = Val.Int32Val & 255;
+ Ptr->Untyped[1] = (Val.Int32Val >> 8) & 255;
+ Ptr->Untyped[2] = (Val.Int32Val >> 16) & 255;
+ Ptr->Untyped[3] = (Val.Int32Val >> 24) & 255;
break;
- case Type::PointerTyID: if (CurMod.has32BitPointers())
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Store4BytesLittleEndian;
case Type::DoubleTyID:
- case Type::ULongTyID:
- case Type::LongTyID: Ptr->Untyped[0] = Val.ULongVal & 255;
- Ptr->Untyped[1] = (Val.ULongVal >> 8) & 255;
- Ptr->Untyped[2] = (Val.ULongVal >> 16) & 255;
- Ptr->Untyped[3] = (Val.ULongVal >> 24) & 255;
- Ptr->Untyped[4] = (Val.ULongVal >> 32) & 255;
- Ptr->Untyped[5] = (Val.ULongVal >> 40) & 255;
- Ptr->Untyped[6] = (Val.ULongVal >> 48) & 255;
- Ptr->Untyped[7] = (Val.ULongVal >> 56) & 255;
- break;
+ case Type::Int64TyID:
+ Ptr->Untyped[0] = (unsigned char)(Val.Int64Val );
+ Ptr->Untyped[1] = (unsigned char)(Val.Int64Val >> 8);
+ Ptr->Untyped[2] = (unsigned char)(Val.Int64Val >> 16);
+ Ptr->Untyped[3] = (unsigned char)(Val.Int64Val >> 24);
+ Ptr->Untyped[4] = (unsigned char)(Val.Int64Val >> 32);
+ Ptr->Untyped[5] = (unsigned char)(Val.Int64Val >> 40);
+ Ptr->Untyped[6] = (unsigned char)(Val.Int64Val >> 48);
+ Ptr->Untyped[7] = (unsigned char)(Val.Int64Val >> 56);
+ break;
default:
- std::cout << "Cannot store value of type " << Ty << "!\n";
+ cerr << "Cannot store value of type " << *Ty << "!\n";
}
} else {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID: Ptr->Untyped[0] = Val.UByteVal; break;
- case Type::UShortTyID:
- case Type::ShortTyID: Ptr->Untyped[1] = Val.UShortVal & 255;
- Ptr->Untyped[0] = (Val.UShortVal >> 8) & 255;
+ switch (Ty->getTypeID()) {
+ case Type::Int1TyID:
+ case Type::Int8TyID: Ptr->Untyped[0] = Val.Int8Val; break;
+ case Type::Int16TyID: Ptr->Untyped[1] = Val.Int16Val & 255;
+ Ptr->Untyped[0] = (Val.Int16Val >> 8) & 255;
break;
Store4BytesBigEndian:
case Type::FloatTyID:
- case Type::UIntTyID:
- case Type::IntTyID: Ptr->Untyped[3] = Val.UIntVal & 255;
- Ptr->Untyped[2] = (Val.UIntVal >> 8) & 255;
- Ptr->Untyped[1] = (Val.UIntVal >> 16) & 255;
- Ptr->Untyped[0] = (Val.UIntVal >> 24) & 255;
+ case Type::Int32TyID: Ptr->Untyped[3] = Val.Int32Val & 255;
+ Ptr->Untyped[2] = (Val.Int32Val >> 8) & 255;
+ Ptr->Untyped[1] = (Val.Int32Val >> 16) & 255;
+ Ptr->Untyped[0] = (Val.Int32Val >> 24) & 255;
break;
- case Type::PointerTyID: if (CurMod.has32BitPointers())
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Store4BytesBigEndian;
case Type::DoubleTyID:
- case Type::ULongTyID:
- case Type::LongTyID: Ptr->Untyped[7] = Val.ULongVal & 255;
- Ptr->Untyped[6] = (Val.ULongVal >> 8) & 255;
- Ptr->Untyped[5] = (Val.ULongVal >> 16) & 255;
- Ptr->Untyped[4] = (Val.ULongVal >> 24) & 255;
- Ptr->Untyped[3] = (Val.ULongVal >> 32) & 255;
- Ptr->Untyped[2] = (Val.ULongVal >> 40) & 255;
- Ptr->Untyped[1] = (Val.ULongVal >> 48) & 255;
- Ptr->Untyped[0] = (Val.ULongVal >> 56) & 255;
- break;
+ case Type::Int64TyID:
+ Ptr->Untyped[7] = (unsigned char)(Val.Int64Val );
+ Ptr->Untyped[6] = (unsigned char)(Val.Int64Val >> 8);
+ Ptr->Untyped[5] = (unsigned char)(Val.Int64Val >> 16);
+ Ptr->Untyped[4] = (unsigned char)(Val.Int64Val >> 24);
+ Ptr->Untyped[3] = (unsigned char)(Val.Int64Val >> 32);
+ Ptr->Untyped[2] = (unsigned char)(Val.Int64Val >> 40);
+ Ptr->Untyped[1] = (unsigned char)(Val.Int64Val >> 48);
+ Ptr->Untyped[0] = (unsigned char)(Val.Int64Val >> 56);
+ break;
default:
- std::cout << "Cannot store value of type " << Ty << "!\n";
+ cerr << "Cannot store value of type " << *Ty << "!\n";
}
}
}
+/// FIXME: document
+///
GenericValue ExecutionEngine::LoadValueFromMemory(GenericValue *Ptr,
const Type *Ty) {
GenericValue Result;
- if (getTargetData().isLittleEndian()) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID: Result.UByteVal = Ptr->Untyped[0]; break;
- case Type::UShortTyID:
- case Type::ShortTyID: Result.UShortVal = (unsigned)Ptr->Untyped[0] |
+ if (getTargetData()->isLittleEndian()) {
+ switch (Ty->getTypeID()) {
+ case Type::Int1TyID:
+ case Type::Int8TyID: Result.Int8Val = Ptr->Untyped[0]; break;
+ case Type::Int16TyID: Result.Int16Val = (unsigned)Ptr->Untyped[0] |
((unsigned)Ptr->Untyped[1] << 8);
break;
- Load4BytesLittleEndian:
+ Load4BytesLittleEndian:
case Type::FloatTyID:
- case Type::UIntTyID:
- case Type::IntTyID: Result.UIntVal = (unsigned)Ptr->Untyped[0] |
+ case Type::Int32TyID: Result.Int32Val = (unsigned)Ptr->Untyped[0] |
((unsigned)Ptr->Untyped[1] << 8) |
((unsigned)Ptr->Untyped[2] << 16) |
((unsigned)Ptr->Untyped[3] << 24);
break;
- case Type::PointerTyID: if (getModule().has32BitPointers())
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Load4BytesLittleEndian;
case Type::DoubleTyID:
- case Type::ULongTyID:
- case Type::LongTyID: Result.ULongVal = (uint64_t)Ptr->Untyped[0] |
+ case Type::Int64TyID: Result.Int64Val = (uint64_t)Ptr->Untyped[0] |
((uint64_t)Ptr->Untyped[1] << 8) |
((uint64_t)Ptr->Untyped[2] << 16) |
((uint64_t)Ptr->Untyped[3] << 24) |
((uint64_t)Ptr->Untyped[7] << 56);
break;
default:
- std::cout << "Cannot load value of type " << *Ty << "!\n";
+ cerr << "Cannot load value of type " << *Ty << "!\n";
abort();
}
} else {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID: Result.UByteVal = Ptr->Untyped[0]; break;
- case Type::UShortTyID:
- case Type::ShortTyID: Result.UShortVal = (unsigned)Ptr->Untyped[1] |
- ((unsigned)Ptr->Untyped[0] << 8);
+ switch (Ty->getTypeID()) {
+ case Type::Int1TyID:
+ case Type::Int8TyID: Result.Int8Val = Ptr->Untyped[0]; break;
+ case Type::Int16TyID: Result.Int16Val = (unsigned)Ptr->Untyped[1] |
+ ((unsigned)Ptr->Untyped[0] << 8);
break;
Load4BytesBigEndian:
case Type::FloatTyID:
- case Type::UIntTyID:
- case Type::IntTyID: Result.UIntVal = (unsigned)Ptr->Untyped[3] |
+ case Type::Int32TyID: Result.Int32Val =(unsigned)Ptr->Untyped[3] |
((unsigned)Ptr->Untyped[2] << 8) |
((unsigned)Ptr->Untyped[1] << 16) |
((unsigned)Ptr->Untyped[0] << 24);
break;
- case Type::PointerTyID: if (getModule().has32BitPointers())
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Load4BytesBigEndian;
case Type::DoubleTyID:
- case Type::ULongTyID:
- case Type::LongTyID: Result.ULongVal = (uint64_t)Ptr->Untyped[7] |
+ case Type::Int64TyID: Result.Int64Val = (uint64_t)Ptr->Untyped[7] |
((uint64_t)Ptr->Untyped[6] << 8) |
((uint64_t)Ptr->Untyped[5] << 16) |
((uint64_t)Ptr->Untyped[4] << 24) |
((uint64_t)Ptr->Untyped[0] << 56);
break;
default:
- std::cout << "Cannot load value of type " << *Ty << "!\n";
+ cerr << "Cannot load value of type " << *Ty << "!\n";
abort();
}
}
return Result;
}
-
// InitializeMemory - Recursive function to apply a Constant value into the
// specified memory location...
//
void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
- if (Init->getType()->isFirstClassType()) {
+ if (isa<UndefValue>(Init)) {
+ return;
+ } else if (const ConstantPacked *CP = dyn_cast<ConstantPacked>(Init)) {
+ unsigned ElementSize =
+ getTargetData()->getTypeSize(CP->getType()->getElementType());
+ for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
+ InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
+ return;
+ } else if (Init->getType()->isFirstClassType()) {
GenericValue Val = getConstantValue(Init);
StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
return;
+ } else if (isa<ConstantAggregateZero>(Init)) {
+ memset(Addr, 0, (size_t)getTargetData()->getTypeSize(Init->getType()));
+ return;
}
- switch (Init->getType()->getPrimitiveID()) {
+ switch (Init->getType()->getTypeID()) {
case Type::ArrayTyID: {
const ConstantArray *CPA = cast<ConstantArray>(Init);
- const std::vector<Use> &Val = CPA->getValues();
- unsigned ElementSize =
- getTargetData().getTypeSize(cast<ArrayType>(CPA->getType())->getElementType());
- for (unsigned i = 0; i < Val.size(); ++i)
- InitializeMemory(cast<Constant>(Val[i].get()), (char*)Addr+i*ElementSize);
+ unsigned ElementSize =
+ getTargetData()->getTypeSize(CPA->getType()->getElementType());
+ for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
+ InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
return;
}
case Type::StructTyID: {
const ConstantStruct *CPS = cast<ConstantStruct>(Init);
const StructLayout *SL =
- getTargetData().getStructLayout(cast<StructType>(CPS->getType()));
- const std::vector<Use> &Val = CPS->getValues();
- for (unsigned i = 0; i < Val.size(); ++i)
- InitializeMemory(cast<Constant>(Val[i].get()),
- (char*)Addr+SL->MemberOffsets[i]);
+ getTargetData()->getStructLayout(cast<StructType>(CPS->getType()));
+ for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
+ InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->MemberOffsets[i]);
return;
}
default:
- std::cerr << "Bad Type: " << Init->getType() << "\n";
+ cerr << "Bad Type: " << *Init->getType() << "\n";
assert(0 && "Unknown constant type to initialize memory with!");
}
}
-
-
-void *ExecutionEngine::CreateArgv(const std::vector<std::string> &InputArgv) {
- if (getTargetData().getPointerSize() == 8) { // 64 bit target?
- PointerTy *Result = new PointerTy[InputArgv.size()+1];
- DEBUG(std::cerr << "ARGV = " << (void*)Result << "\n");
-
- for (unsigned i = 0; i < InputArgv.size(); ++i) {
- unsigned Size = InputArgv[i].size()+1;
- char *Dest = new char[Size];
- DEBUG(std::cerr << "ARGV[" << i << "] = " << (void*)Dest << "\n");
-
- copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
- Dest[Size-1] = 0;
-
- // Endian safe: Result[i] = (PointerTy)Dest;
- StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i), Type::LongTy);
- }
- Result[InputArgv.size()] = 0;
- return Result;
-
- } else { // 32 bit target?
- int *Result = new int[InputArgv.size()+1];
- DEBUG(std::cerr << "ARGV = " << (void*)Result << "\n");
-
- for (unsigned i = 0; i < InputArgv.size(); ++i) {
- unsigned Size = InputArgv[i].size()+1;
- char *Dest = new char[Size];
- DEBUG(std::cerr << "ARGV[" << i << "] = " << (void*)Dest << "\n");
-
- copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
- Dest[Size-1] = 0;
-
- // Endian safe: Result[i] = (PointerTy)Dest;
- StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i), Type::IntTy);
- }
- Result[InputArgv.size()] = 0; // null terminate it
- return Result;
- }
-}
-
/// EmitGlobals - Emit all of the global variables to memory, storing their
/// addresses into GlobalAddress. This must make sure to copy the contents of
/// their initializers into the memory.
///
void ExecutionEngine::emitGlobals() {
- const TargetData &TD = getTargetData();
-
+ const TargetData *TD = getTargetData();
+
// Loop over all of the global variables in the program, allocating the memory
- // to hold them.
- for (Module::giterator I = getModule().gbegin(), E = getModule().gend();
- I != E; ++I)
- if (!I->isExternal()) {
- // Get the type of the global...
- const Type *Ty = I->getType()->getElementType();
-
- // Allocate some memory for it!
- unsigned Size = TD.getTypeSize(Ty);
- GlobalAddress[I] = new char[Size];
- NumInitBytes += Size;
-
- DEBUG(std::cerr << "Global '" << I->getName() << "' -> "
- << (void*)GlobalAddress[I] << "\n");
- } else {
- // External variable reference, try to use dlsym to get a pointer to it in
- // the LLI image.
- if (void *SymAddr = dlsym(0, I->getName().c_str()))
- GlobalAddress[I] = SymAddr;
- else {
- std::cerr << "Could not resolve external global address: "
- << I->getName() << "\n";
- abort();
+ // to hold them. If there is more than one module, do a prepass over globals
+ // to figure out how the different modules should link together.
+ //
+ std::map<std::pair<std::string, const Type*>,
+ const GlobalValue*> LinkedGlobalsMap;
+
+ if (Modules.size() != 1) {
+ for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
+ Module &M = *Modules[m]->getModule();
+ for (Module::const_global_iterator I = M.global_begin(),
+ E = M.global_end(); I != E; ++I) {
+ const GlobalValue *GV = I;
+ if (GV->hasInternalLinkage() || GV->isExternal() ||
+ GV->hasAppendingLinkage() || !GV->hasName())
+ continue;// Ignore external globals and globals with internal linkage.
+
+ const GlobalValue *&GVEntry =
+ LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
+
+ // If this is the first time we've seen this global, it is the canonical
+ // version.
+ if (!GVEntry) {
+ GVEntry = GV;
+ continue;
+ }
+
+ // If the existing global is strong, never replace it.
+ if (GVEntry->hasExternalLinkage() ||
+ GVEntry->hasDLLImportLinkage() ||
+ GVEntry->hasDLLExportLinkage())
+ continue;
+
+ // Otherwise, we know it's linkonce/weak, replace it if this is a strong
+ // symbol.
+ if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
+ GVEntry = GV;
}
}
+ }
- // Now that all of the globals are set up in memory, loop through them all and
- // initialize their contents.
- for (Module::giterator I = getModule().gbegin(), E = getModule().gend();
- I != E; ++I)
- if (!I->isExternal())
- InitializeMemory(I->getInitializer(), GlobalAddress[I]);
+ std::vector<const GlobalValue*> NonCanonicalGlobals;
+ for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
+ Module &M = *Modules[m]->getModule();
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I) {
+ // In the multi-module case, see what this global maps to.
+ if (!LinkedGlobalsMap.empty()) {
+ if (const GlobalValue *GVEntry =
+ LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())]) {
+ // If something else is the canonical global, ignore this one.
+ if (GVEntry != &*I) {
+ NonCanonicalGlobals.push_back(I);
+ continue;
+ }
+ }
+ }
+
+ if (!I->isExternal()) {
+ // Get the type of the global.
+ const Type *Ty = I->getType()->getElementType();
+
+ // Allocate some memory for it!
+ unsigned Size = TD->getTypeSize(Ty);
+ addGlobalMapping(I, new char[Size]);
+ } else {
+ // External variable reference. Try to use the dynamic loader to
+ // get a pointer to it.
+ if (void *SymAddr =
+ sys::DynamicLibrary::SearchForAddressOfSymbol(I->getName().c_str()))
+ addGlobalMapping(I, SymAddr);
+ else {
+ cerr << "Could not resolve external global address: "
+ << I->getName() << "\n";
+ abort();
+ }
+ }
+ }
+
+ // If there are multiple modules, map the non-canonical globals to their
+ // canonical location.
+ if (!NonCanonicalGlobals.empty()) {
+ for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
+ const GlobalValue *GV = NonCanonicalGlobals[i];
+ const GlobalValue *CGV =
+ LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
+ void *Ptr = getPointerToGlobalIfAvailable(CGV);
+ assert(Ptr && "Canonical global wasn't codegen'd!");
+ addGlobalMapping(GV, getPointerToGlobalIfAvailable(CGV));
+ }
+ }
+
+ // Now that all of the globals are set up in memory, loop through them all and
+ // initialize their contents.
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I) {
+ if (!I->isExternal()) {
+ if (!LinkedGlobalsMap.empty()) {
+ if (const GlobalValue *GVEntry =
+ LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())])
+ if (GVEntry != &*I) // Not the canonical variable.
+ continue;
+ }
+ EmitGlobalVariable(I);
+ }
+ }
+ }
}
+// EmitGlobalVariable - This method emits the specified global variable to the
+// address specified in GlobalAddresses, or allocates new memory if it's not
+// already in the map.
+void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
+ void *GA = getPointerToGlobalIfAvailable(GV);
+ DOUT << "Global '" << GV->getName() << "' -> " << GA << "\n";
+
+ const Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)getTargetData()->getTypeSize(ElTy);
+ if (GA == 0) {
+ // If it's not already specified, allocate memory for the global.
+ GA = new char[GVSize];
+ addGlobalMapping(GV, GA);
+ }
+
+ InitializeMemory(GV->getInitializer(), GA);
+ NumInitBytes += (unsigned)GVSize;
+ ++NumGlobals;
+}
projects / oota-llvm.git / blobdiff