#include "JIT.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
#include "llvm/ModuleProvider.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetJITInfo.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/MutexGuard.h"
#include "llvm/System/DynamicLibrary.h"
#include "llvm/Config/config.h"
using namespace llvm;
#ifdef __APPLE__
# include <AvailabilityMacros.h>
# if defined(MAC_OS_X_VERSION_10_4) && \
((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \
(MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \
__APPLE_CC__ >= 5330))
# ifndef HAVE___DSO_HANDLE
# define HAVE___DSO_HANDLE 1
# endif
# endif
#endif
#if HAVE___DSO_HANDLE
extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
#endif
namespace {
static struct RegisterJIT {
RegisterJIT() { JIT::Register(); }
} JITRegistrator;
}
namespace llvm {
void LinkInJIT() {
}
}
#if defined(__GNUC__) && !defined(__ARM__EABI__)
extern "C" void __register_frame(void*);
#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED <= 1050
# define USE_KEYMGR 1
#else
# define USE_KEYMGR 0
#endif
#if USE_KEYMGR
namespace {
struct LibgccObject {
void *unused1;
void *unused2;
void *unused3;
void *frame;
union {
struct {
unsigned long sorted : 1;
unsigned long from_array : 1;
unsigned long mixed_encoding : 1;
unsigned long encoding : 8;
unsigned long count : 21;
} b;
size_t i;
} encoding;
char *fde_end;
struct LibgccObject *next;
};
extern "C" void _keymgr_set_and_unlock_processwide_ptr(int, void *);
extern "C" void *_keymgr_get_and_lock_processwide_ptr(int);
#define KEYMGR_GCC3_DW2_OBJ_LIST 302
struct LibgccObjectInfo {
struct LibgccObject* seenObjects;
struct LibgccObject* unseenObjects;
unsigned unused[2];
};
void DarwinRegisterFrame(void* FrameBegin) {
LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
_keymgr_get_and_lock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST);
assert(LOI && "This should be preallocated by the runtime");
struct LibgccObject* ob = (struct LibgccObject*)
malloc(sizeof(struct LibgccObject));
ob->unused1 = (void *)-1;
ob->unused2 = 0;
ob->unused3 = 0;
ob->frame = FrameBegin;
ob->encoding.i = 0;
ob->encoding.b.encoding = llvm::dwarf::DW_EH_PE_omit;
ob->fde_end = (char*)LOI->unseenObjects;
ob->next = LOI->unseenObjects;
LOI->unseenObjects = ob;
_keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST,
LOI);
}
}
#endif // __APPLE__
#endif // __GNUC__
ExecutionEngine *ExecutionEngine::createJIT(ModuleProvider *MP,
std::string *ErrorStr,
JITMemoryManager *JMM,
CodeGenOpt::Level OptLevel) {
ExecutionEngine *EE = JIT::createJIT(MP, ErrorStr, JMM, OptLevel);
if (!EE) return 0;
sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr);
return EE;
}
JIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji,
JITMemoryManager *JMM, CodeGenOpt::Level OptLevel)
: ExecutionEngine(MP), TM(tm), TJI(tji) {
setTargetData(TM.getTargetData());
jitstate = new JITState(MP);
MCE = createEmitter(*this, JMM);
MutexGuard locked(lock);
FunctionPassManager &PM = jitstate->getPM(locked);
PM.add(new TargetData(*TM.getTargetData()));
if (TM.addPassesToEmitMachineCode(PM, *MCE, OptLevel)) {
cerr << "Target does not support machine code emission!\n";
abort();
}
#if defined(__GNUC__) && !defined(__ARM_EABI__)
#if USE_KEYMGR
struct LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
_keymgr_get_and_lock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST);
if (!LOI)
LOI = (LibgccObjectInfo*)calloc(sizeof(struct LibgccObjectInfo), 1);
_keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST, LOI);
InstallExceptionTableRegister(DarwinRegisterFrame);
#else
InstallExceptionTableRegister(__register_frame);
#endif // __APPLE__
#endif // __GNUC__
PM.doInitialization();
}
JIT::~JIT() {
delete jitstate;
delete MCE;
delete &TM;
}
void JIT::addModuleProvider(ModuleProvider *MP) {
MutexGuard locked(lock);
if (Modules.empty()) {
assert(!jitstate && "jitstate should be NULL if Modules vector is empty!");
jitstate = new JITState(MP);
FunctionPassManager &PM = jitstate->getPM(locked);
PM.add(new TargetData(*TM.getTargetData()));
if (TM.addPassesToEmitMachineCode(PM, *MCE, CodeGenOpt::Default)) {
cerr << "Target does not support machine code emission!\n";
abort();
}
PM.doInitialization();
}
ExecutionEngine::addModuleProvider(MP);
}
Module *JIT::removeModuleProvider(ModuleProvider *MP, std::string *E) {
Module *result = ExecutionEngine::removeModuleProvider(MP, E);
MutexGuard locked(lock);
if (jitstate->getMP() == MP) {
delete jitstate;
jitstate = 0;
}
if (!jitstate && !Modules.empty()) {
jitstate = new JITState(Modules[0]);
FunctionPassManager &PM = jitstate->getPM(locked);
PM.add(new TargetData(*TM.getTargetData()));
if (TM.addPassesToEmitMachineCode(PM, *MCE, CodeGenOpt::Default)) {
cerr << "Target does not support machine code emission!\n";
abort();
}
PM.doInitialization();
}
return result;
}
void JIT::deleteModuleProvider(ModuleProvider *MP, std::string *E) {
ExecutionEngine::deleteModuleProvider(MP, E);
MutexGuard locked(lock);
if (jitstate->getMP() == MP) {
delete jitstate;
jitstate = 0;
}
if (!jitstate && !Modules.empty()) {
jitstate = new JITState(Modules[0]);
FunctionPassManager &PM = jitstate->getPM(locked);
PM.add(new TargetData(*TM.getTargetData()));
if (TM.addPassesToEmitMachineCode(PM, *MCE, CodeGenOpt::Default)) {
cerr << "Target does not support machine code emission!\n";
abort();
}
PM.doInitialization();
}
}
GenericValue JIT::runFunction(Function *F,
const std::vector<GenericValue> &ArgValues) {
assert(F && "Function *F was null at entry to run()");
void *FPtr = getPointerToFunction(F);
assert(FPtr && "Pointer to fn's code was null after getPointerToFunction");
const FunctionType *FTy = F->getFunctionType();
const Type *RetTy = FTy->getReturnType();
assert((FTy->getNumParams() == ArgValues.size() ||
(FTy->isVarArg() && FTy->getNumParams() <= ArgValues.size())) &&
"Wrong number of arguments passed into function!");
assert(FTy->getNumParams() == ArgValues.size() &&
"This doesn't support passing arguments through varargs (yet)!");
if (RetTy == Type::Int32Ty || RetTy == Type::VoidTy) {
switch (ArgValues.size()) {
case 3:
if (FTy->getParamType(0) == Type::Int32Ty &&
isa<PointerType>(FTy->getParamType(1)) &&
isa<PointerType>(FTy->getParamType(2))) {
int (*PF)(int, char **, const char **) =
(int(*)(int, char **, const char **))(intptr_t)FPtr;
GenericValue rv;
rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
(char **)GVTOP(ArgValues[1]),
(const char **)GVTOP(ArgValues[2])));
return rv;
}
break;
case 2:
if (FTy->getParamType(0) == Type::Int32Ty &&
isa<PointerType>(FTy->getParamType(1))) {
int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr;
GenericValue rv;
rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
(char **)GVTOP(ArgValues[1])));
return rv;
}
break;
case 1:
if (FTy->getNumParams() == 1 &&
FTy->getParamType(0) == Type::Int32Ty) {
GenericValue rv;
int (*PF)(int) = (int(*)(int))(intptr_t)FPtr;
rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue()));
return rv;
}
break;
}
}
if (ArgValues.empty()) {
GenericValue rv;
switch (RetTy->getTypeID()) {
default: assert(0 && "Unknown return type for function call!");
case Type::IntegerTyID: {
unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth();
if (BitWidth == 1)
rv.IntVal = APInt(BitWidth, ((bool(*)())(intptr_t)FPtr)());
else if (BitWidth <= 8)
rv.IntVal = APInt(BitWidth, ((char(*)())(intptr_t)FPtr)());
else if (BitWidth <= 16)
rv.IntVal = APInt(BitWidth, ((short(*)())(intptr_t)FPtr)());
else if (BitWidth <= 32)
rv.IntVal = APInt(BitWidth, ((int(*)())(intptr_t)FPtr)());
else if (BitWidth <= 64)
rv.IntVal = APInt(BitWidth, ((int64_t(*)())(intptr_t)FPtr)());
else
assert(0 && "Integer types > 64 bits not supported");
return rv;
}
case Type::VoidTyID:
rv.IntVal = APInt(32, ((int(*)())(intptr_t)FPtr)());
return rv;
case Type::FloatTyID:
rv.FloatVal = ((float(*)())(intptr_t)FPtr)();
return rv;
case Type::DoubleTyID:
rv.DoubleVal = ((double(*)())(intptr_t)FPtr)();
return rv;
case Type::X86_FP80TyID:
case Type::FP128TyID:
case Type::PPC_FP128TyID:
assert(0 && "long double not supported yet");
return rv;
case Type::PointerTyID:
return PTOGV(((void*(*)())(intptr_t)FPtr)());
}
}
FunctionType *STy=FunctionType::get(RetTy, std::vector<const Type*>(), false);
Function *Stub = Function::Create(STy, Function::InternalLinkage, "",
F->getParent());
BasicBlock *StubBB = BasicBlock::Create("", Stub);
SmallVector<Value*, 8> Args;
for (unsigned i = 0, e = ArgValues.size(); i != e; ++i) {
Constant *C = 0;
const Type *ArgTy = FTy->getParamType(i);
const GenericValue &AV = ArgValues[i];
switch (ArgTy->getTypeID()) {
default: assert(0 && "Unknown argument type for function call!");
case Type::IntegerTyID:
C = ConstantInt::get(AV.IntVal);
break;
case Type::FloatTyID:
C = ConstantFP::get(APFloat(AV.FloatVal));
break;
case Type::DoubleTyID:
C = ConstantFP::get(APFloat(AV.DoubleVal));
break;
case Type::PPC_FP128TyID:
case Type::X86_FP80TyID:
case Type::FP128TyID:
C = ConstantFP::get(APFloat(AV.IntVal));
break;
case Type::PointerTyID:
void *ArgPtr = GVTOP(AV);
if (sizeof(void*) == 4)
C = ConstantInt::get(Type::Int32Ty, (int)(intptr_t)ArgPtr);
else
C = ConstantInt::get(Type::Int64Ty, (intptr_t)ArgPtr);
C = ConstantExpr::getIntToPtr(C, ArgTy); break;
}
Args.push_back(C);
}
CallInst *TheCall = CallInst::Create(F, Args.begin(), Args.end(),
"", StubBB);
TheCall->setCallingConv(F->getCallingConv());
TheCall->setTailCall();
if (TheCall->getType() != Type::VoidTy)
ReturnInst::Create(TheCall, StubBB); else
ReturnInst::Create(StubBB);
return runFunction(Stub, std::vector<GenericValue>());
}
void JIT::runJITOnFunction(Function *F) {
MutexGuard locked(lock);
runJITOnFunctionUnlocked(F, locked);
}
void JIT::runJITOnFunctionUnlocked(Function *F, const MutexGuard &locked) {
static bool isAlreadyCodeGenerating = false;
assert(!isAlreadyCodeGenerating && "Error: Recursive compilation detected!");
isAlreadyCodeGenerating = true;
jitstate->getPM(locked).run(*F);
isAlreadyCodeGenerating = false;
while (!jitstate->getPendingFunctions(locked).empty()) {
Function *PF = jitstate->getPendingFunctions(locked).back();
jitstate->getPendingFunctions(locked).pop_back();
isAlreadyCodeGenerating = true;
jitstate->getPM(locked).run(*PF);
isAlreadyCodeGenerating = false;
updateFunctionStub(PF);
}
if (areDlsymStubsEnabled() && isLazyCompilationDisabled())
updateDlsymStubTable();
}
void *JIT::getPointerToFunction(Function *F) {
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr;
MutexGuard locked(lock);
if (F->hasNotBeenReadFromBitcode()) {
Module *M = F->getParent();
ModuleProvider *MP = 0;
for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
if (Modules[i]->getModule() == M) {
MP = Modules[i];
break;
}
}
assert(MP && "Function isn't in a module we know about!");
std::string ErrorMsg;
if (MP->materializeFunction(F, &ErrorMsg)) {
cerr << "Error reading function '" << F->getName()
<< "' from bitcode file: " << ErrorMsg << "\n";
abort();
}
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr;
}
if (F->isDeclaration()) {
bool AbortOnFailure =
!areDlsymStubsEnabled() && !F->hasExternalWeakLinkage();
void *Addr = getPointerToNamedFunction(F->getName(), AbortOnFailure);
addGlobalMapping(F, Addr);
return Addr;
}
runJITOnFunctionUnlocked(F, locked);
void *Addr = getPointerToGlobalIfAvailable(F);
assert(Addr && "Code generation didn't add function to GlobalAddress table!");
return Addr;
}
void *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) {
MutexGuard locked(lock);
void *Ptr = getPointerToGlobalIfAvailable(GV);
if (Ptr) return Ptr;
if (GV->isDeclaration()) {
#if HAVE___DSO_HANDLE
if (GV->getName() == "__dso_handle")
return (void*)&__dso_handle;
#endif
Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(GV->getName().c_str());
if (Ptr == 0 && !areDlsymStubsEnabled()) {
cerr << "Could not resolve external global address: "
<< GV->getName() << "\n";
abort();
}
addGlobalMapping(GV, Ptr);
} else {
if (isGVCompilationDisabled() && !GV->isConstant()) {
cerr << "Compilation of non-internal GlobalValue is disabled!\n";
abort();
}
const Type *GlobalType = GV->getType()->getElementType();
size_t S = getTargetData()->getTypePaddedSize(GlobalType);
size_t A = getTargetData()->getPreferredAlignment(GV);
if (GV->isThreadLocal()) {
MutexGuard locked(lock);
Ptr = TJI.allocateThreadLocalMemory(S);
} else if (TJI.allocateSeparateGVMemory()) {
if (A <= 8) {
Ptr = malloc(S);
} else {
Ptr = malloc(S+A);
unsigned MisAligned = ((intptr_t)Ptr & (A-1));
Ptr = (char*)Ptr + (MisAligned ? (A-MisAligned) : 0);
}
} else {
Ptr = MCE->allocateSpace(S, A);
}
addGlobalMapping(GV, Ptr);
EmitGlobalVariable(GV);
}
return Ptr;
}
void *JIT::recompileAndRelinkFunction(Function *F) {
void *OldAddr = getPointerToGlobalIfAvailable(F);
if (OldAddr == 0) { return getPointerToFunction(F); }
addGlobalMapping(F, 0);
runJITOnFunction(F);
void *Addr = getPointerToGlobalIfAvailable(F);
assert(Addr && "Code generation didn't add function to GlobalAddress table!");
TJI.replaceMachineCodeForFunction(OldAddr, Addr);
return Addr;
}
char* JIT::getMemoryForGV(const GlobalVariable* GV) {
const Type *ElTy = GV->getType()->getElementType();
size_t GVSize = (size_t)getTargetData()->getTypePaddedSize(ElTy);
if (GV->isThreadLocal()) {
MutexGuard locked(lock);
return TJI.allocateThreadLocalMemory(GVSize);
} else {
return new char[GVSize];
}
}
void JIT::addPendingFunction(Function *F) {
MutexGuard locked(lock);
jitstate->getPendingFunctions(locked).push_back(F);
}