//
//===----------------------------------------------------------------------===//
-#include "ExecutionEngine.h"
-#include "GenericValue.h"
+#define DEBUG_TYPE "jit"
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "JIT/VM.h"
+#include "Interpreter/Interpreter.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/Target/TargetData.h"
+#include "Support/Debug.h"
#include "Support/Statistic.h"
+#include "Support/DynamicLinker.h"
+#include "Config/dlfcn.h"
Statistic<> NumInitBytes("lli", "Number of bytes of global vars initialized");
+ExecutionEngine::~ExecutionEngine() {
+ delete &CurMod;
+}
+
+ExecutionEngine *ExecutionEngine::create (Module *M, bool ForceInterpreter,
+ bool TraceMode) {
+ ExecutionEngine *EE = 0;
+
+ // If there is nothing that is forcing us to use the interpreter, make a JIT.
+ if (!ForceInterpreter && !TraceMode)
+ EE = VM::create(M);
+
+ // If we can't make a JIT, make an interpreter instead.
+ if (EE == 0)
+ EE = Interpreter::create(M, TraceMode);
+ 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];
}
-
GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
GenericValue Result;
-#define GET_CONST_VAL(TY, CLASS) \
- case Type::TY##TyID: Result.TY##Val = cast<CLASS>(C)->getValue(); break
+ if (ConstantExpr *CE = const_cast<ConstantExpr*>(dyn_cast<ConstantExpr>(C))) {
+ switch (CE->getOpcode()) {
+ case Instruction::GetElementPtr: {
+ 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;
+ return Result;
+ }
+ case Instruction::Cast: {
+ // We only need to handle a few cases here. Almost all casts will
+ // automatically fold, just the ones involving pointers won't.
+ //
+ Constant *Op = CE->getOperand(0);
+
+ // Handle cast of pointer to pointer...
+ if (Op->getType()->getPrimitiveID() == C->getType()->getPrimitiveID())
+ return getConstantValue(Op);
+
+ // Handle a cast of pointer to any integral type...
+ if (isa<PointerType>(Op->getType()) && C->getType()->isIntegral())
+ return getConstantValue(Op);
+
+ // Handle cast of long to pointer...
+ if (isa<PointerType>(C->getType()) && (Op->getType() == Type::LongTy ||
+ Op->getType() == Type::ULongTy))
+ return getConstantValue(Op);
+ break;
+ }
+
+ case Instruction::Add:
+ if (CE->getOperand(0)->getType() == Type::LongTy ||
+ CE->getOperand(0)->getType() == Type::ULongTy)
+ Result.LongVal = getConstantValue(CE->getOperand(0)).LongVal +
+ getConstantValue(CE->getOperand(1)).LongVal;
+ else
+ break;
+ return Result;
+
+ default:
+ break;
+ }
+ std::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);
break;
default:
std::cout << "ERROR: Constant unimp for type: " << C->getType() << "\n";
+ abort();
}
return Result;
}
case Type::ShortTyID: Ptr->Untyped[0] = Val.UShortVal & 255;
Ptr->Untyped[1] = (Val.UShortVal >> 8) & 255;
break;
+ Store4BytesLittleEndian:
case Type::FloatTyID:
case Type::UIntTyID:
case Type::IntTyID: Ptr->Untyped[0] = Val.UIntVal & 255;
Ptr->Untyped[2] = (Val.UIntVal >> 16) & 255;
Ptr->Untyped[3] = (Val.UIntVal >> 24) & 255;
break;
+ case Type::PointerTyID: if (getTargetData().getPointerSize() == 4)
+ goto Store4BytesLittleEndian;
case Type::DoubleTyID:
case Type::ULongTyID:
- case Type::LongTyID:
- case Type::PointerTyID: Ptr->Untyped[0] = Val.ULongVal & 255;
+ 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;
case Type::ShortTyID: Ptr->Untyped[1] = Val.UShortVal & 255;
Ptr->Untyped[0] = (Val.UShortVal >> 8) & 255;
break;
+ Store4BytesBigEndian:
case Type::FloatTyID:
case Type::UIntTyID:
case Type::IntTyID: Ptr->Untyped[3] = Val.UIntVal & 255;
Ptr->Untyped[1] = (Val.UIntVal >> 16) & 255;
Ptr->Untyped[0] = (Val.UIntVal >> 24) & 255;
break;
+ case Type::PointerTyID: if (getTargetData().getPointerSize() == 4)
+ goto Store4BytesBigEndian;
case Type::DoubleTyID:
case Type::ULongTyID:
- case Type::LongTyID:
- case Type::PointerTyID: Ptr->Untyped[7] = Val.ULongVal & 255;
+ 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;
}
}
+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] |
+ ((unsigned)Ptr->Untyped[1] << 8);
+ break;
+ Load4BytesLittleEndian:
+ case Type::FloatTyID:
+ case Type::UIntTyID:
+ case Type::IntTyID: Result.UIntVal = (unsigned)Ptr->Untyped[0] |
+ ((unsigned)Ptr->Untyped[1] << 8) |
+ ((unsigned)Ptr->Untyped[2] << 16) |
+ ((unsigned)Ptr->Untyped[3] << 24);
+ break;
+ 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] |
+ ((uint64_t)Ptr->Untyped[1] << 8) |
+ ((uint64_t)Ptr->Untyped[2] << 16) |
+ ((uint64_t)Ptr->Untyped[3] << 24) |
+ ((uint64_t)Ptr->Untyped[4] << 32) |
+ ((uint64_t)Ptr->Untyped[5] << 40) |
+ ((uint64_t)Ptr->Untyped[6] << 48) |
+ ((uint64_t)Ptr->Untyped[7] << 56);
+ break;
+ default:
+ std::cout << "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);
+ break;
+ Load4BytesBigEndian:
+ case Type::FloatTyID:
+ case Type::UIntTyID:
+ case Type::IntTyID: Result.UIntVal = (unsigned)Ptr->Untyped[3] |
+ ((unsigned)Ptr->Untyped[2] << 8) |
+ ((unsigned)Ptr->Untyped[1] << 16) |
+ ((unsigned)Ptr->Untyped[0] << 24);
+ break;
+ 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] |
+ ((uint64_t)Ptr->Untyped[6] << 8) |
+ ((uint64_t)Ptr->Untyped[5] << 16) |
+ ((uint64_t)Ptr->Untyped[4] << 24) |
+ ((uint64_t)Ptr->Untyped[3] << 32) |
+ ((uint64_t)Ptr->Untyped[2] << 40) |
+ ((uint64_t)Ptr->Untyped[1] << 48) |
+ ((uint64_t)Ptr->Untyped[0] << 56);
+ break;
+ default:
+ std::cout << "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::CreateArgv(const std::vector<std::string> &InputArgv) {
- // Pointers are 64 bits...
- // FIXME: Assumes 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); // 64 bit assumption
- }
-
- Result[InputArgv.size()] = 0;
- 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.
DEBUG(std::cerr << "Global '" << I->getName() << "' -> "
<< (void*)GlobalAddress[I] << "\n");
} else {
- std::cerr << "Global: " << I->getName() << "\n";
- assert(0 && "References to external globals not handled yet!");
+ // External variable reference. Try to use the dynamic loader to
+ // get a pointer to it.
+ if (void *SymAddr = GetAddressOfSymbol(I->getName().c_str()))
+ GlobalAddress[I] = SymAddr;
+ else {
+ std::cerr << "Could not resolve external global address: "
+ << I->getName() << "\n";
+ abort();
+ }
}
// Now that all of the globals are set up in memory, loop through them all and
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