#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/CodeGen/JITCodeEmitter.h"
+#include "llvm/CodeGen/MachineCodeInfo.h"
#include "llvm/ExecutionEngine/GenericValue.h"
-#include "llvm/Support/MutexGuard.h"
-#include "llvm/System/DynamicLibrary.h"
+#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetJITInfo.h"
-
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MutexGuard.h"
+#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Config/config.h"
using namespace llvm;
-#ifdef __APPLE__
+#ifdef __APPLE__
// Apple gcc defaults to -fuse-cxa-atexit (i.e. calls __cxa_atexit instead
// of atexit). It passes the address of linker generated symbol __dso_handle
// to the function.
}
-namespace llvm {
- void LinkInJIT() {
- }
+extern "C" void LLVMLinkInJIT() {
}
+// Determine whether we can register EH tables.
+#if (defined(__GNUC__) && !defined(__ARM_EABI__) && \
+ !defined(__USING_SJLJ_EXCEPTIONS__))
+#define HAVE_EHTABLE_SUPPORT 1
+#else
+#define HAVE_EHTABLE_SUPPORT 0
+#endif
+
+#if HAVE_EHTABLE_SUPPORT
-#if defined (__GNUC__)
-
// libgcc defines the __register_frame function to dynamically register new
// dwarf frames for exception handling. This functionality is not portable
// across compilers and is only provided by GCC. We use the __register_frame
// values of an opaque key, used by libgcc to find dwarf tables.
extern "C" void __register_frame(void*);
+extern "C" void __deregister_frame(void*);
-#if defined (__APPLE__)
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED <= 1050
+# define USE_KEYMGR 1
+#else
+# define USE_KEYMGR 0
+#endif
+
+#if USE_KEYMGR
namespace {
void *unused1;
void *unused2;
void *unused3;
-
+
/// frame - Pointer to the exception table.
void *frame;
-
+
/// encoding - The encoding of the object?
union {
struct {
unsigned long from_array : 1;
unsigned long mixed_encoding : 1;
unsigned long encoding : 8;
- unsigned long count : 21;
+ unsigned long count : 21;
} b;
size_t i;
} encoding;
-
+
/// fde_end - libgcc defines this field only if some macro is defined. We
/// include this field even if it may not there, to make libgcc happy.
char *fde_end;
-
+
/// next - At least we know it's a chained list!
struct LibgccObject *next;
};
/// unseenObjects - LibgccObjects not parsed yet by the unwinding runtime.
///
struct LibgccObject* unseenObjects;
-
+
unsigned unused[2];
};
-// for DW_EH_PE_omit
-#include "llvm/Support/Dwarf.h"
-
/// darwin_register_frame - Since __register_frame does not work with darwin's
/// libgcc,we provide our own function, which "tricks" libgcc by modifying the
/// "Dwarf2 object list" key.
void DarwinRegisterFrame(void* FrameBegin) {
// Get the key.
- struct LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
+ LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
_keymgr_get_and_lock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST);
-
+ assert(LOI && "This should be preallocated by the runtime");
+
// Allocate a new LibgccObject to represent this frame. Deallocation of this
// object may be impossible: since darwin code in libgcc was written after
// the ability to dynamically register frames, things may crash if we
// deallocate it.
struct LibgccObject* ob = (struct LibgccObject*)
malloc(sizeof(struct LibgccObject));
-
+
// Do like libgcc for the values of the field.
ob->unused1 = (void *)-1;
ob->unused2 = 0;
ob->unused3 = 0;
ob->frame = FrameBegin;
- ob->encoding.i = 0;
+ ob->encoding.i = 0;
ob->encoding.b.encoding = llvm::dwarf::DW_EH_PE_omit;
-
- // Put the info on both places, as libgcc uses the first or the the second
+
+ // Put the info on both places, as libgcc uses the first or the second
// field. Note that we rely on having two pointers here. If fde_end was a
// char, things would get complicated.
ob->fde_end = (char*)LOI->unseenObjects;
ob->next = LOI->unseenObjects;
-
+
// Update the key's unseenObjects list.
LOI->unseenObjects = ob;
-
- // Finally update the "key". Apparently, libgcc requires it.
+
+ // Finally update the "key". Apparently, libgcc requires it.
_keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST,
LOI);
}
#endif // __APPLE__
-#endif // __GNUC__
+#endif // HAVE_EHTABLE_SUPPORT
/// createJIT - This is the factory method for creating a JIT for the current
/// machine, it does not fall back to the interpreter. This takes ownership
-/// of the module provider.
-ExecutionEngine *ExecutionEngine::createJIT(ModuleProvider *MP,
- std::string *ErrorStr,
- JITMemoryManager *JMM,
- bool Fast) {
- ExecutionEngine *EE = JIT::createJIT(MP, ErrorStr, JMM, Fast);
- if (!EE) return 0;
-
- // 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, ErrorStr);
- return EE;
+/// of the module.
+ExecutionEngine *JIT::createJIT(Module *M,
+ std::string *ErrorStr,
+ JITMemoryManager *JMM,
+ CodeGenOpt::Level OptLevel,
+ bool GVsWithCode,
+ TargetMachine *TM) {
+ // Try to register the program as a source of symbols to resolve against.
+ //
+ // FIXME: Don't do this here.
+ sys::DynamicLibrary::LoadLibraryPermanently(0, NULL);
+
+ // If the target supports JIT code generation, create the JIT.
+ if (TargetJITInfo *TJ = TM->getJITInfo()) {
+ return new JIT(M, *TM, *TJ, JMM, OptLevel, GVsWithCode);
+ } else {
+ if (ErrorStr)
+ *ErrorStr = "target does not support JIT code generation";
+ return 0;
+ }
}
-JIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji,
- JITMemoryManager *JMM, bool Fast)
- : ExecutionEngine(MP), TM(tm), TJI(tji) {
+namespace {
+/// This class supports the global getPointerToNamedFunction(), which allows
+/// bugpoint or gdb users to search for a function by name without any context.
+class JitPool {
+ SmallPtrSet<JIT*, 1> JITs; // Optimize for process containing just 1 JIT.
+ mutable sys::Mutex Lock;
+public:
+ void Add(JIT *jit) {
+ MutexGuard guard(Lock);
+ JITs.insert(jit);
+ }
+ void Remove(JIT *jit) {
+ MutexGuard guard(Lock);
+ JITs.erase(jit);
+ }
+ void *getPointerToNamedFunction(const char *Name) const {
+ MutexGuard guard(Lock);
+ assert(JITs.size() != 0 && "No Jit registered");
+ //search function in every instance of JIT
+ for (SmallPtrSet<JIT*, 1>::const_iterator Jit = JITs.begin(),
+ end = JITs.end();
+ Jit != end; ++Jit) {
+ if (Function *F = (*Jit)->FindFunctionNamed(Name))
+ return (*Jit)->getPointerToFunction(F);
+ }
+ // The function is not available : fallback on the first created (will
+ // search in symbol of the current program/library)
+ return (*JITs.begin())->getPointerToNamedFunction(Name);
+ }
+};
+ManagedStatic<JitPool> AllJits;
+}
+extern "C" {
+ // getPointerToNamedFunction - This function is used as a global wrapper to
+ // JIT::getPointerToNamedFunction for the purpose of resolving symbols when
+ // bugpoint is debugging the JIT. In that scenario, we are loading an .so and
+ // need to resolve function(s) that are being mis-codegenerated, so we need to
+ // resolve their addresses at runtime, and this is the way to do it.
+ void *getPointerToNamedFunction(const char *Name) {
+ return AllJits->getPointerToNamedFunction(Name);
+ }
+}
+
+JIT::JIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,
+ JITMemoryManager *JMM, CodeGenOpt::Level OptLevel, bool GVsWithCode)
+ : ExecutionEngine(M), TM(tm), TJI(tji), AllocateGVsWithCode(GVsWithCode),
+ isAlreadyCodeGenerating(false) {
setTargetData(TM.getTargetData());
- jitstate = new JITState(MP);
+ jitstate = new JITState(M);
+
+ // Initialize JCE
+ JCE = createEmitter(*this, JMM, TM);
- // Initialize MCE
- MCE = createEmitter(*this, JMM);
+ // Register in global list of all JITs.
+ AllJits->Add(this);
// Add target data
MutexGuard locked(lock);
// Turn the machine code intermediate representation into bytes in memory that
// may be executed.
- if (TM.addPassesToEmitMachineCode(PM, *MCE, Fast)) {
- cerr << "Target does not support machine code emission!\n";
- abort();
+ if (TM.addPassesToEmitMachineCode(PM, *JCE, OptLevel)) {
+ report_fatal_error("Target does not support machine code emission!");
}
-
+
// Register routine for informing unwinding runtime about new EH frames
-#if defined(__GNUC__)
-#if defined(__APPLE__)
+#if HAVE_EHTABLE_SUPPORT
+#if USE_KEYMGR
struct LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
_keymgr_get_and_lock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST);
-
+
// The key is created on demand, and libgcc creates it the first time an
// exception occurs. Since we need the key to register frames, we create
// it now.
- if (!LOI) {
- LOI = (LibgccObjectInfo*)malloc(sizeof(struct LibgccObjectInfo));
- _keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST,
- LOI);
- }
+ if (!LOI)
+ LOI = (LibgccObjectInfo*)calloc(sizeof(struct LibgccObjectInfo), 1);
+ _keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST, LOI);
InstallExceptionTableRegister(DarwinRegisterFrame);
+ // Not sure about how to deregister on Darwin.
#else
InstallExceptionTableRegister(__register_frame);
+ InstallExceptionTableDeregister(__deregister_frame);
#endif // __APPLE__
-#endif // __GNUC__
-
+#endif // HAVE_EHTABLE_SUPPORT
+
// Initialize passes.
PM.doInitialization();
}
JIT::~JIT() {
+ // Unregister all exception tables registered by this JIT.
+ DeregisterAllTables();
+ // Cleanup.
+ AllJits->Remove(this);
delete jitstate;
- delete MCE;
+ delete JCE;
delete &TM;
}
-/// addModuleProvider - Add a new ModuleProvider to the JIT. If we previously
-/// removed the last ModuleProvider, we need re-initialize jitstate with a valid
-/// ModuleProvider.
-void JIT::addModuleProvider(ModuleProvider *MP) {
+/// addModule - Add a new Module to the JIT. If we previously removed the last
+/// Module, we need re-initialize jitstate with a valid Module.
+void JIT::addModule(Module *M) {
MutexGuard locked(lock);
if (Modules.empty()) {
assert(!jitstate && "jitstate should be NULL if Modules vector is empty!");
- jitstate = new JITState(MP);
+ jitstate = new JITState(M);
FunctionPassManager &PM = jitstate->getPM(locked);
PM.add(new TargetData(*TM.getTargetData()));
// Turn the machine code intermediate representation into bytes in memory
// that may be executed.
- if (TM.addPassesToEmitMachineCode(PM, *MCE, false /*fast*/)) {
- cerr << "Target does not support machine code emission!\n";
- abort();
+ if (TM.addPassesToEmitMachineCode(PM, *JCE, CodeGenOpt::Default)) {
+ report_fatal_error("Target does not support machine code emission!");
}
-
+
// Initialize passes.
PM.doInitialization();
}
-
- ExecutionEngine::addModuleProvider(MP);
+
+ ExecutionEngine::addModule(M);
}
-/// removeModuleProvider - If we are removing the last ModuleProvider,
-/// invalidate the jitstate since the PassManager it contains references a
-/// released ModuleProvider.
-Module *JIT::removeModuleProvider(ModuleProvider *MP, std::string *E) {
- Module *result = ExecutionEngine::removeModuleProvider(MP, E);
-
+/// removeModule - If we are removing the last Module, invalidate the jitstate
+/// since the PassManager it contains references a released Module.
+bool JIT::removeModule(Module *M) {
+ bool result = ExecutionEngine::removeModule(M);
+
MutexGuard locked(lock);
- if (Modules.empty()) {
+
+ if (jitstate->getModule() == M) {
delete jitstate;
jitstate = 0;
}
-
+
+ if (!jitstate && !Modules.empty()) {
+ jitstate = new JITState(Modules[0]);
+
+ FunctionPassManager &PM = jitstate->getPM(locked);
+ PM.add(new TargetData(*TM.getTargetData()));
+
+ // Turn the machine code intermediate representation into bytes in memory
+ // that may be executed.
+ if (TM.addPassesToEmitMachineCode(PM, *JCE, CodeGenOpt::Default)) {
+ report_fatal_error("Target does not support machine code emission!");
+ }
+
+ // Initialize passes.
+ PM.doInitialization();
+ }
return result;
}
const FunctionType *FTy = F->getFunctionType();
const Type *RetTy = FTy->getReturnType();
- assert((FTy->getNumParams() <= ArgValues.size() || FTy->isVarArg()) &&
- "Too many arguments passed into function!");
+ 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)!");
// Handle some common cases first. These cases correspond to common `main'
// prototypes.
- if (RetTy == Type::Int32Ty || RetTy == Type::VoidTy) {
+ if (RetTy->isIntegerTy(32) || RetTy->isVoidTy()) {
switch (ArgValues.size()) {
case 3:
- if (FTy->getParamType(0) == Type::Int32Ty &&
- isa<PointerType>(FTy->getParamType(1)) &&
- isa<PointerType>(FTy->getParamType(2))) {
+ if (FTy->getParamType(0)->isIntegerTy(32) &&
+ FTy->getParamType(1)->isPointerTy() &&
+ FTy->getParamType(2)->isPointerTy()) {
int (*PF)(int, char **, const char **) =
(int(*)(int, char **, const char **))(intptr_t)FPtr;
// Call the function.
GenericValue rv;
- rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
+ 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))) {
+ if (FTy->getParamType(0)->isIntegerTy(32) &&
+ FTy->getParamType(1)->isPointerTy()) {
int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr;
// Call the function.
GenericValue rv;
- rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
+ 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) {
+ FTy->getParamType(0)->isIntegerTy(32)) {
GenericValue rv;
int (*PF)(int) = (int(*)(int))(intptr_t)FPtr;
rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue()));
if (ArgValues.empty()) {
GenericValue rv;
switch (RetTy->getTypeID()) {
- default: assert(0 && "Unknown return type for function call!");
+ default: llvm_unreachable("Unknown return type for function call!");
case Type::IntegerTyID: {
unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth();
if (BitWidth == 1)
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");
+ else
+ llvm_unreachable("Integer types > 64 bits not supported");
return rv;
}
case Type::VoidTyID:
case Type::X86_FP80TyID:
case Type::FP128TyID:
case Type::PPC_FP128TyID:
- assert(0 && "long double not supported yet");
+ llvm_unreachable("long double not supported yet");
return rv;
case Type::PointerTyID:
return PTOGV(((void*(*)())(intptr_t)FPtr)());
// arguments. Make this function and return.
// First, create the function.
- FunctionType *STy=FunctionType::get(RetTy, std::vector<const Type*>(), false);
+ FunctionType *STy=FunctionType::get(RetTy, false);
Function *Stub = Function::Create(STy, Function::InternalLinkage, "",
F->getParent());
// Insert a basic block.
- BasicBlock *StubBB = BasicBlock::Create("", Stub);
+ BasicBlock *StubBB = BasicBlock::Create(F->getContext(), "", Stub);
// Convert all of the GenericValue arguments over to constants. Note that we
// currently don't support varargs.
const Type *ArgTy = FTy->getParamType(i);
const GenericValue &AV = ArgValues[i];
switch (ArgTy->getTypeID()) {
- default: assert(0 && "Unknown argument type for function call!");
+ default: llvm_unreachable("Unknown argument type for function call!");
case Type::IntegerTyID:
- C = ConstantInt::get(AV.IntVal);
+ C = ConstantInt::get(F->getContext(), AV.IntVal);
break;
case Type::FloatTyID:
- C = ConstantFP::get(APFloat(AV.FloatVal));
+ C = ConstantFP::get(F->getContext(), APFloat(AV.FloatVal));
break;
case Type::DoubleTyID:
- C = ConstantFP::get(APFloat(AV.DoubleVal));
+ C = ConstantFP::get(F->getContext(), APFloat(AV.DoubleVal));
break;
case Type::PPC_FP128TyID:
case Type::X86_FP80TyID:
case Type::FP128TyID:
- C = ConstantFP::get(APFloat(AV.IntVal));
+ C = ConstantFP::get(F->getContext(), APFloat(AV.IntVal));
break;
case Type::PointerTyID:
void *ArgPtr = GVTOP(AV);
if (sizeof(void*) == 4)
- C = ConstantInt::get(Type::Int32Ty, (int)(intptr_t)ArgPtr);
+ C = ConstantInt::get(Type::getInt32Ty(F->getContext()),
+ (int)(intptr_t)ArgPtr);
else
- C = ConstantInt::get(Type::Int64Ty, (intptr_t)ArgPtr);
- C = ConstantExpr::getIntToPtr(C, ArgTy); // Cast the integer to pointer
+ C = ConstantInt::get(Type::getInt64Ty(F->getContext()),
+ (intptr_t)ArgPtr);
+ // Cast the integer to pointer
+ C = ConstantExpr::getIntToPtr(C, ArgTy);
break;
}
Args.push_back(C);
"", StubBB);
TheCall->setCallingConv(F->getCallingConv());
TheCall->setTailCall();
- if (TheCall->getType() != Type::VoidTy)
- ReturnInst::Create(TheCall, StubBB); // Return result of the call.
+ if (!TheCall->getType()->isVoidTy())
+ // Return result of the call.
+ ReturnInst::Create(F->getContext(), TheCall, StubBB);
else
- ReturnInst::Create(StubBB); // Just return void.
+ ReturnInst::Create(F->getContext(), StubBB); // Just return void.
+
+ // Finally, call our nullary stub function.
+ GenericValue Result = runFunction(Stub, std::vector<GenericValue>());
+ // Erase it, since no other function can have a reference to it.
+ Stub->eraseFromParent();
+ // And return the result.
+ return Result;
+}
+
+void JIT::RegisterJITEventListener(JITEventListener *L) {
+ if (L == NULL)
+ return;
+ MutexGuard locked(lock);
+ EventListeners.push_back(L);
+}
+void JIT::UnregisterJITEventListener(JITEventListener *L) {
+ if (L == NULL)
+ return;
+ MutexGuard locked(lock);
+ std::vector<JITEventListener*>::reverse_iterator I=
+ std::find(EventListeners.rbegin(), EventListeners.rend(), L);
+ if (I != EventListeners.rend()) {
+ std::swap(*I, EventListeners.back());
+ EventListeners.pop_back();
+ }
+}
+void JIT::NotifyFunctionEmitted(
+ const Function &F,
+ void *Code, size_t Size,
+ const JITEvent_EmittedFunctionDetails &Details) {
+ MutexGuard locked(lock);
+ for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
+ EventListeners[I]->NotifyFunctionEmitted(F, Code, Size, Details);
+ }
+}
- // Finally, return the value returned by our nullary stub function.
- return runFunction(Stub, std::vector<GenericValue>());
+void JIT::NotifyFreeingMachineCode(void *OldPtr) {
+ MutexGuard locked(lock);
+ for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
+ EventListeners[I]->NotifyFreeingMachineCode(OldPtr);
+ }
}
/// runJITOnFunction - Run the FunctionPassManager full of
/// just-in-time compilation passes on F, hopefully filling in
/// GlobalAddress[F] with the address of F's machine code.
///
-void JIT::runJITOnFunction(Function *F) {
- static bool isAlreadyCodeGenerating = false;
-
+void JIT::runJITOnFunction(Function *F, MachineCodeInfo *MCI) {
MutexGuard locked(lock);
+
+ class MCIListener : public JITEventListener {
+ MachineCodeInfo *const MCI;
+ public:
+ MCIListener(MachineCodeInfo *mci) : MCI(mci) {}
+ virtual void NotifyFunctionEmitted(const Function &,
+ void *Code, size_t Size,
+ const EmittedFunctionDetails &) {
+ MCI->setAddress(Code);
+ MCI->setSize(Size);
+ }
+ };
+ MCIListener MCIL(MCI);
+ if (MCI)
+ RegisterJITEventListener(&MCIL);
+
+ runJITOnFunctionUnlocked(F, locked);
+
+ if (MCI)
+ UnregisterJITEventListener(&MCIL);
+}
+
+void JIT::runJITOnFunctionUnlocked(Function *F, const MutexGuard &locked) {
assert(!isAlreadyCodeGenerating && "Error: Recursive compilation detected!");
- // JIT the function
+ jitTheFunction(F, locked);
+
+ // If the function referred to another function that had not yet been
+ // read from bitcode, and we are jitting non-lazily, emit it now.
+ while (!jitstate->getPendingFunctions(locked).empty()) {
+ Function *PF = jitstate->getPendingFunctions(locked).back();
+ jitstate->getPendingFunctions(locked).pop_back();
+
+ assert(!PF->hasAvailableExternallyLinkage() &&
+ "Externally-defined function should not be in pending list.");
+
+ jitTheFunction(PF, locked);
+
+ // Now that the function has been jitted, ask the JITEmitter to rewrite
+ // the stub with real address of the function.
+ updateFunctionStub(PF);
+ }
+}
+
+void JIT::jitTheFunction(Function *F, const MutexGuard &locked) {
isAlreadyCodeGenerating = true;
jitstate->getPM(locked).run(*F);
isAlreadyCodeGenerating = false;
- // If the function referred to a global variable that had not yet been
- // emitted, it allocates memory for the global, but doesn't emit it yet. Emit
- // all of these globals now.
- while (!jitstate->getPendingGlobals(locked).empty()) {
- const GlobalVariable *GV = jitstate->getPendingGlobals(locked).back();
- jitstate->getPendingGlobals(locked).pop_back();
- EmitGlobalVariable(GV);
- }
+ // clear basic block addresses after this function is done
+ getBasicBlockAddressMap(locked).clear();
}
/// getPointerToFunction - This method is used to get the address of the
-/// specified function, compiling it if neccesary.
+/// specified function, compiling it if necessary.
///
void *JIT::getPointerToFunction(Function *F) {
if (void *Addr = getPointerToGlobalIfAvailable(F))
return Addr; // Check if function already code gen'd
- // Make sure we read in the function if it exists in this Module.
- if (F->hasNotBeenReadFromBitcode()) {
- // Determine the module provider this function is provided by.
- 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();
- }
- }
+ MutexGuard locked(lock);
- if (void *Addr = getPointerToGlobalIfAvailable(F)) {
- return Addr;
+ // Now that this thread owns the lock, make sure we read in the function if it
+ // exists in this Module.
+ std::string ErrorMsg;
+ if (F->Materialize(&ErrorMsg)) {
+ report_fatal_error("Error reading function '" + F->getName()+
+ "' from bitcode file: " + ErrorMsg);
}
- MutexGuard locked(lock);
+ // ... and check if another thread has already code gen'd the function.
+ if (void *Addr = getPointerToGlobalIfAvailable(F))
+ return Addr;
- if (F->isDeclaration()) {
- void *Addr = getPointerToNamedFunction(F->getName());
+ if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) {
+ bool AbortOnFailure = !F->hasExternalWeakLinkage();
+ void *Addr = getPointerToNamedFunction(F->getName(), AbortOnFailure);
addGlobalMapping(F, Addr);
return Addr;
}
- runJITOnFunction(F);
+ runJITOnFunctionUnlocked(F, locked);
void *Addr = getPointerToGlobalIfAvailable(F);
assert(Addr && "Code generation didn't add function to GlobalAddress table!");
return Addr;
}
+void JIT::addPointerToBasicBlock(const BasicBlock *BB, void *Addr) {
+ MutexGuard locked(lock);
+
+ BasicBlockAddressMapTy::iterator I =
+ getBasicBlockAddressMap(locked).find(BB);
+ if (I == getBasicBlockAddressMap(locked).end()) {
+ getBasicBlockAddressMap(locked)[BB] = Addr;
+ } else {
+ // ignore repeats: some BBs can be split into few MBBs?
+ }
+}
+
+void JIT::clearPointerToBasicBlock(const BasicBlock *BB) {
+ MutexGuard locked(lock);
+ getBasicBlockAddressMap(locked).erase(BB);
+}
+
+void *JIT::getPointerToBasicBlock(BasicBlock *BB) {
+ // make sure it's function is compiled by JIT
+ (void)getPointerToFunction(BB->getParent());
+
+ // resolve basic block address
+ MutexGuard locked(lock);
+
+ BasicBlockAddressMapTy::iterator I =
+ getBasicBlockAddressMap(locked).find(BB);
+ if (I != getBasicBlockAddressMap(locked).end()) {
+ return I->second;
+ } else {
+ assert(0 && "JIT does not have BB address for address-of-label, was"
+ " it eliminated by optimizer?");
+ return 0;
+ }
+}
+
/// getOrEmitGlobalVariable - Return the address of the specified global
/// variable, possibly emitting it to memory if needed. This is used by the
/// Emitter.
if (Ptr) return Ptr;
// If the global is external, just remember the address.
- if (GV->isDeclaration()) {
+ if (GV->isDeclaration() || GV->hasAvailableExternallyLinkage()) {
#if HAVE___DSO_HANDLE
if (GV->getName() == "__dso_handle")
return (void*)&__dso_handle;
#endif
- Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(GV->getName().c_str());
+ Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(GV->getName());
if (Ptr == 0) {
- cerr << "Could not resolve external global address: "
- << GV->getName() << "\n";
- abort();
- addGlobalMapping(GV, Ptr);
+ report_fatal_error("Could not resolve external global address: "
+ +GV->getName());
}
+ addGlobalMapping(GV, Ptr);
} else {
- if (isGVCompilationDisabled()) {
- cerr << "Compilation of GlobalVariable is disabled!\n";
- abort();
- }
// If the global hasn't been emitted to memory yet, allocate space and
- // emit it into memory. It goes in the same array as the generated
- // code, jump tables, etc.
- const Type *GlobalType = GV->getType()->getElementType();
- size_t S = getTargetData()->getABITypeSize(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 {
- // Allocate S+A bytes of memory, then use an aligned pointer within that
- // space.
- Ptr = malloc(S+A);
- unsigned MisAligned = ((intptr_t)Ptr & (A-1));
- Ptr = (char*)Ptr + (MisAligned ? (A-MisAligned) : 0);
- }
- } else {
- Ptr = MCE->allocateSpace(S, A);
- }
+ // emit it into memory.
+ Ptr = getMemoryForGV(GV);
addGlobalMapping(GV, Ptr);
- EmitGlobalVariable(GV);
+ EmitGlobalVariable(GV); // Initialize the variable.
}
return Ptr;
}
/// on the target.
///
char* JIT::getMemoryForGV(const GlobalVariable* GV) {
- const Type *ElTy = GV->getType()->getElementType();
- size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
+ char *Ptr;
+
+ // GlobalVariable's which are not "constant" will cause trouble in a server
+ // situation. It's returned in the same block of memory as code which may
+ // not be writable.
+ if (isGVCompilationDisabled() && !GV->isConstant()) {
+ report_fatal_error("Compilation of non-internal GlobalValue is disabled!");
+ }
+
+ // Some applications require globals and code to live together, so they may
+ // be allocated into the same buffer, but in general globals are allocated
+ // through the memory manager which puts them near the code but not in the
+ // same buffer.
+ const Type *GlobalType = GV->getType()->getElementType();
+ size_t S = getTargetData()->getTypeAllocSize(GlobalType);
+ size_t A = getTargetData()->getPreferredAlignment(GV);
if (GV->isThreadLocal()) {
MutexGuard locked(lock);
- return TJI.allocateThreadLocalMemory(GVSize);
+ Ptr = TJI.allocateThreadLocalMemory(S);
+ } else if (TJI.allocateSeparateGVMemory()) {
+ if (A <= 8) {
+ Ptr = (char*)malloc(S);
+ } else {
+ // Allocate S+A bytes of memory, then use an aligned pointer within that
+ // space.
+ Ptr = (char*)malloc(S+A);
+ unsigned MisAligned = ((intptr_t)Ptr & (A-1));
+ Ptr = Ptr + (MisAligned ? (A-MisAligned) : 0);
+ }
+ } else if (AllocateGVsWithCode) {
+ Ptr = (char*)JCE->allocateSpace(S, A);
} else {
- return new char[GVSize];
+ Ptr = (char*)JCE->allocateGlobal(S, A);
}
+ return Ptr;
+}
+
+void JIT::addPendingFunction(Function *F) {
+ MutexGuard locked(lock);
+ jitstate->getPendingFunctions(locked).push_back(F);
}
+
+
+JITEventListener::~JITEventListener() {}
projects / oota-llvm.git / blobdiff