//===-- 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.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "jit"
-#include "Interpreter/Interpreter.h"
-#include "JIT/JIT.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/IntrinsicLowering.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 <iostream>
using namespace llvm;
namespace {
Statistic<> NumGlobals ("lli", "Number of global vars initialized");
}
-ExecutionEngine::ExecutionEngine(ModuleProvider *P) :
+ExecutionEngine::EECtorFn ExecutionEngine::JITCtor = 0;
+ExecutionEngine::EECtorFn ExecutionEngine::InterpCtor = 0;
+
+ExecutionEngine::ExecutionEngine(ModuleProvider *P) :
CurMod(*P->getModule()), MP(P) {
assert(P && "ModuleProvider is null?");
}
delete MP;
}
+/// 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 (GlobalAddressReverseMap.empty()) {
- for (std::map<const GlobalValue*, void *>::iterator I =
- GlobalAddressMap.begin(), E = GlobalAddressMap.end(); I != E; ++I)
- GlobalAddressReverseMap.insert(std::make_pair(I->second, I->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 =
- GlobalAddressReverseMap.find(Addr);
- return I != GlobalAddressReverseMap.end() ? I->second : 0;
+ 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
//
static void *CreateArgv(ExecutionEngine *EE,
const std::vector<std::string> &InputArgv) {
- unsigned PtrSize = EE->getTargetData().getPointerSize();
+ unsigned PtrSize = EE->getTargetData()->getPointerSize();
char *Result = new char[(InputArgv.size()+1)*PtrSize];
DEBUG(std::cerr << "ARGV = " << (void*)Result << "\n");
unsigned Size = InputArgv[i].size()+1;
char *Dest = new char[Size];
DEBUG(std::cerr << "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);
return Result;
}
+
+/// runStaticConstructorsDestructors - This method is used to execute all of
+/// the static constructors or destructors for a module, depending on the
+/// value of isDtors.
+void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
+ const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
+ GlobalVariable *GV = CurMod.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()) return;
+
+ // 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) return;
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
+ if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
+ if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
+
+ Constant *FP = CS->getOperand(1);
+ if (FP->isNullValue())
+ return; // Found a null terminator, exit.
+
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
+ if (CE->getOpcode() == Instruction::Cast)
+ 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.
return runFunction(Fn, GVArgs).IntVal;
}
-
-
/// 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.
+/// NULL is returned.
///
-ExecutionEngine *ExecutionEngine::create(ModuleProvider *MP,
- bool ForceInterpreter,
- IntrinsicLowering *IL) {
+ExecutionEngine *ExecutionEngine::create(ModuleProvider *MP,
+ bool ForceInterpreter) {
ExecutionEngine *EE = 0;
// Unless the interpreter was explicitly selected, try making a JIT.
- if (!ForceInterpreter)
- EE = JIT::create(MP, IL);
+ if (!ForceInterpreter && JITCtor)
+ EE = JITCtor(MP);
// If we can't make a JIT, make an interpreter instead.
- if (EE == 0) {
+ 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 {
- Module *M = MP->materializeModule();
- try {
- EE = Interpreter::create(M, IL);
- } catch (...) {
- std::cerr << "Error creating the interpreter!\n";
- }
- } catch (std::string& errmsg) {
- std::cerr << "Error reading the bytecode file: " << errmsg << "\n";
+ sys::DynamicLibrary::LoadLibraryPermanently(0);
} catch (...) {
- std::cerr << "Error reading the bytecode file!\n";
}
}
- if (EE == 0)
- delete IL;
- else
- // 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.
- sys::DynamicLibrary::LoadLibraryPermanently(0);
-
return EE;
}
if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
return getPointerToFunction(F);
- assert(GlobalAddressMap[GV] && "Global hasn't had an address allocated yet?");
- return GlobalAddressMap[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];
}
/// FIXME: document
-///
+///
GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
GenericValue Result;
if (isa<UndefValue>(C)) return Result;
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.IntVal += Offset;
+ else
+ Result.LongVal += Offset;
return Result;
}
case Instruction::Cast: {
// Handle a cast of pointer to any integral type...
if (isa<PointerType>(Op->getType()) && C->getType()->isIntegral())
return GV;
-
+
// Handle cast of integer to a pointer...
if (isa<PointerType>(C->getType()) && Op->getType()->isIntegral())
switch (Op->getType()->getTypeID()) {
std::cerr << "ConstantExpr not handled as global var init: " << *CE << "\n";
abort();
}
-
+
switch (C->getType()->getTypeID()) {
#define GET_CONST_VAL(TY, CTY, CLASS) \
case Type::TY##TyID: Result.TY##Val = (CTY)cast<CLASS>(C)->getValue(); break
GET_CONST_VAL(Short , signed short , ConstantSInt);
GET_CONST_VAL(UInt , unsigned int , ConstantUInt);
GET_CONST_VAL(Int , signed int , ConstantSInt);
- GET_CONST_VAL(ULong , unsigned long , ConstantUInt);
- GET_CONST_VAL(Long , signed long , ConstantSInt);
+ GET_CONST_VAL(ULong , uint64_t , ConstantUInt);
+ GET_CONST_VAL(Long , int64_t , ConstantSInt);
GET_CONST_VAL(Float , float , ConstantFP);
GET_CONST_VAL(Double , double , ConstantFP);
#undef GET_CONST_VAL
return Result;
}
-/// FIXME: document
+/// 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()) {
+ if (getTargetData()->isLittleEndian()) {
switch (Ty->getTypeID()) {
case Type::BoolTyID:
case Type::UByteTyID:
Ptr->Untyped[2] = (Val.UIntVal >> 16) & 255;
Ptr->Untyped[3] = (Val.UIntVal >> 24) & 255;
break;
- case Type::PointerTyID: if (getTargetData().getPointerSize() == 4)
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Store4BytesLittleEndian;
case Type::DoubleTyID:
case Type::ULongTyID:
Ptr->Untyped[1] = (Val.UIntVal >> 16) & 255;
Ptr->Untyped[0] = (Val.UIntVal >> 24) & 255;
break;
- case Type::PointerTyID: if (getTargetData().getPointerSize() == 4)
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Store4BytesBigEndian;
case Type::DoubleTyID:
case Type::ULongTyID:
case Type::LongTyID:
- Ptr->Untyped[7] = (unsigned char)(Val.ULongVal );
+ Ptr->Untyped[7] = (unsigned char)(Val.ULongVal );
Ptr->Untyped[6] = (unsigned char)(Val.ULongVal >> 8);
Ptr->Untyped[5] = (unsigned char)(Val.ULongVal >> 16);
Ptr->Untyped[4] = (unsigned char)(Val.ULongVal >> 24);
GenericValue ExecutionEngine::LoadValueFromMemory(GenericValue *Ptr,
const Type *Ty) {
GenericValue Result;
- if (getTargetData().isLittleEndian()) {
+ if (getTargetData()->isLittleEndian()) {
switch (Ty->getTypeID()) {
case Type::BoolTyID:
case Type::UByteTyID:
case Type::ShortTyID: Result.UShortVal = (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] |
((unsigned)Ptr->Untyped[2] << 16) |
((unsigned)Ptr->Untyped[3] << 24);
break;
- case Type::PointerTyID: if (getTargetData().getPointerSize() == 4)
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Load4BytesLittleEndian;
case Type::DoubleTyID:
case Type::ULongTyID:
((unsigned)Ptr->Untyped[1] << 16) |
((unsigned)Ptr->Untyped[0] << 24);
break;
- case Type::PointerTyID: if (getTargetData().getPointerSize() == 4)
+ case Type::PointerTyID: if (getTargetData()->getPointerSize() == 4)
goto Load4BytesBigEndian;
case Type::DoubleTyID:
case Type::ULongTyID:
void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
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()));
+ memset(Addr, 0, (size_t)getTargetData()->getTypeSize(Init->getType()));
return;
}
switch (Init->getType()->getTypeID()) {
case Type::ArrayTyID: {
const ConstantArray *CPA = cast<ConstantArray>(Init);
- unsigned ElementSize =
- getTargetData().getTypeSize(cast<ArrayType>(CPA->getType())->getElementType());
+ 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()));
+ 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;
/// 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();
+ Module &M = getModule();
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
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);
+ unsigned Size = TD->getTypeSize(Ty);
addGlobalMapping(I, new char[Size]);
} else {
// External variable reference. Try to use the dynamic loader to
abort();
}
}
-
+
// 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();
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
if (!I->isExternal())
EmitGlobalVariable(I);
DEBUG(std::cerr << "Global '" << GV->getName() << "' -> " << GA << "\n");
const Type *ElTy = GV->getType()->getElementType();
- size_t GVSize = (size_t)getTargetData().getTypeSize(ElTy);
+ 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];
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