#define DEBUG_TYPE "jit"
#include "JIT.h"
-#include "JITDebugRegisterer.h"
-#include "JITDwarfEmitter.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/OwningPtr.h"
-#include "llvm/Constants.h"
-#include "llvm/Module.h"
-#include "llvm/DerivedTypes.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/ValueMap.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
-#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineCodeInfo.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRelocation.h"
+#include "llvm/DebugInfo.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/ExecutionEngine/JITMemoryManager.h"
-#include "llvm/CodeGen/MachineCodeInfo.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetJITInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/ValueHandle.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/Disassembler.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Memory.h"
#include "llvm/Support/MutexGuard.h"
-#include "llvm/Support/ValueHandle.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Disassembler.h"
-#include "llvm/System/Memory.h"
#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/ValueMap.h"
+#include "llvm/Target/TargetJITInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
#include <algorithm>
#ifndef NDEBUG
#include <iomanip>
STATISTIC(NumBytes, "Number of bytes of machine code compiled");
STATISTIC(NumRelos, "Number of relocations applied");
STATISTIC(NumRetries, "Number of retries with more memory");
-static JIT *TheJIT = 0;
+// A declaration may stop being a declaration once it's fully read from bitcode.
+// This function returns true if F is fully read and is still a declaration.
+static bool isNonGhostDeclaration(const Function *F) {
+ return F->isDeclaration() && !F->isMaterializable();
+}
+
//===----------------------------------------------------------------------===//
// JIT lazy compilation code.
//
struct NoRAUWValueMapConfig : public ValueMapConfig<ValueTy> {
typedef JITResolverState *ExtraData;
static void onRAUW(JITResolverState *, Value *Old, Value *New) {
- assert(false && "The JIT doesn't know how to handle a"
- " RAUW on a value it has emitted.");
+ llvm_unreachable("The JIT doesn't know how to handle a"
+ " RAUW on a value it has emitted.");
}
};
/// particular GlobalVariable so that we can reuse them if necessary.
GlobalToIndirectSymMapTy GlobalToIndirectSymMap;
+#ifndef NDEBUG
+ /// Instance of the JIT this ResolverState serves.
+ JIT *TheJIT;
+#endif
+
public:
- JITResolverState() : FunctionToLazyStubMap(this),
- FunctionToCallSitesMap(this) {}
+ JITResolverState(JIT *jit) : FunctionToLazyStubMap(this),
+ FunctionToCallSitesMap(this) {
+#ifndef NDEBUG
+ TheJIT = jit;
+#endif
+ }
FunctionToLazyStubMapTy& getFunctionToLazyStubMap(
const MutexGuard& locked) {
return FunctionToLazyStubMap;
}
- GlobalToIndirectSymMapTy& getGlobalToIndirectSymMap(const MutexGuard& locked) {
- assert(locked.holds(TheJIT->lock));
+ GlobalToIndirectSymMapTy& getGlobalToIndirectSymMap(const MutexGuard& lck) {
+ assert(lck.holds(TheJIT->lock));
return GlobalToIndirectSymMap;
}
- pair<void *, Function *> LookupFunctionFromCallSite(
+ std::pair<void *, Function *> LookupFunctionFromCallSite(
const MutexGuard &locked, void *CallSite) const {
assert(locked.holds(TheJIT->lock));
- // The address given to us for the stub may not be exactly right, it might be
- // a little bit after the stub. As such, use upper_bound to find it.
+ // The address given to us for the stub may not be exactly right, it
+ // might be a little bit after the stub. As such, use upper_bound to
+ // find it.
CallSiteToFunctionMapTy::const_iterator I =
CallSiteToFunctionMap.upper_bound(CallSite);
assert(I != CallSiteToFunctionMap.begin() &&
FunctionToCallSitesMap[F].insert(CallSite);
}
- // Returns the Function of the stub if a stub was erased, or NULL if there
- // was no stub. This function uses the call-site->function map to find a
- // relevant function, but asserts that only stubs and not other call sites
- // will be passed in.
- Function *EraseStub(const MutexGuard &locked, void *Stub) {
- CallSiteToFunctionMapTy::iterator C2F_I =
- CallSiteToFunctionMap.find(Stub);
- if (C2F_I == CallSiteToFunctionMap.end()) {
- // Not a stub.
- return NULL;
- }
+ void EraseAllCallSitesForPrelocked(Function *F);
- Function *const F = C2F_I->second;
-#ifndef NDEBUG
- void *RealStub = FunctionToLazyStubMap.lookup(F);
- assert(RealStub == Stub &&
- "Call-site that wasn't a stub pass in to EraseStub");
-#endif
- FunctionToLazyStubMap.erase(F);
- CallSiteToFunctionMap.erase(C2F_I);
-
- // Remove the stub from the function->call-sites map, and remove the whole
- // entry from the map if that was the last call site.
- FunctionToCallSitesMapTy::iterator F2C_I = FunctionToCallSitesMap.find(F);
- assert(F2C_I != FunctionToCallSitesMap.end() &&
- "FunctionToCallSitesMap broken");
- bool Erased = F2C_I->second.erase(Stub);
- (void)Erased;
- assert(Erased && "FunctionToCallSitesMap broken");
- if (F2C_I->second.empty())
- FunctionToCallSitesMap.erase(F2C_I);
-
- return F;
- }
-
- void EraseAllCallSites(const MutexGuard &locked, Function *F) {
- assert(locked.holds(TheJIT->lock));
- EraseAllCallSitesPrelocked(F);
- }
- void EraseAllCallSitesPrelocked(Function *F) {
- FunctionToCallSitesMapTy::iterator F2C = FunctionToCallSitesMap.find(F);
- if (F2C == FunctionToCallSitesMap.end())
- return;
- for (SmallPtrSet<void*, 1>::const_iterator I = F2C->second.begin(),
- E = F2C->second.end(); I != E; ++I) {
- bool Erased = CallSiteToFunctionMap.erase(*I);
- (void)Erased;
- assert(Erased && "Missing call site->function mapping");
- }
- FunctionToCallSitesMap.erase(F2C);
- }
+ // Erases _all_ call sites regardless of their function. This is used to
+ // unregister the stub addresses from the StubToResolverMap in
+ // ~JITResolver().
+ void EraseAllCallSitesPrelocked();
};
/// JITResolver - Keep track of, and resolve, call sites for functions that
JITEmitter &JE;
- static JITResolver *TheJITResolver;
- public:
- explicit JITResolver(JIT &jit, JITEmitter &je) : nextGOTIndex(0), JE(je) {
- TheJIT = &jit;
+ /// Instance of JIT corresponding to this Resolver.
+ JIT *TheJIT;
+ public:
+ explicit JITResolver(JIT &jit, JITEmitter &je)
+ : state(&jit), nextGOTIndex(0), JE(je), TheJIT(&jit) {
LazyResolverFn = jit.getJITInfo().getLazyResolverFunction(JITCompilerFn);
- assert(TheJITResolver == 0 && "Multiple JIT resolvers?");
- TheJITResolver = this;
}
- ~JITResolver() {
- TheJITResolver = 0;
- }
+ ~JITResolver();
/// getLazyFunctionStubIfAvailable - This returns a pointer to a function's
/// lazy-compilation stub if it has already been created.
/// specified GV address.
void *getGlobalValueIndirectSym(GlobalValue *V, void *GVAddress);
- void getRelocatableGVs(SmallVectorImpl<GlobalValue*> &GVs,
- SmallVectorImpl<void*> &Ptrs);
-
- GlobalValue *invalidateStub(void *Stub);
-
/// getGOTIndexForAddress - Return a new or existing index in the GOT for
/// an address. This function only manages slots, it does not manage the
/// contents of the slots or the memory associated with the GOT.
static void *JITCompilerFn(void *Stub);
};
+ class StubToResolverMapTy {
+ /// Map a stub address to a specific instance of a JITResolver so that
+ /// lazily-compiled functions can find the right resolver to use.
+ ///
+ /// Guarded by Lock.
+ std::map<void*, JITResolver*> Map;
+
+ /// Guards Map from concurrent accesses.
+ mutable sys::Mutex Lock;
+
+ public:
+ /// Registers a Stub to be resolved by Resolver.
+ void RegisterStubResolver(void *Stub, JITResolver *Resolver) {
+ MutexGuard guard(Lock);
+ Map.insert(std::make_pair(Stub, Resolver));
+ }
+ /// Unregisters the Stub when it's invalidated.
+ void UnregisterStubResolver(void *Stub) {
+ MutexGuard guard(Lock);
+ Map.erase(Stub);
+ }
+ /// Returns the JITResolver instance that owns the Stub.
+ JITResolver *getResolverFromStub(void *Stub) const {
+ MutexGuard guard(Lock);
+ // The address given to us for the stub may not be exactly right, it might
+ // be a little bit after the stub. As such, use upper_bound to find it.
+ // This is the same trick as in LookupFunctionFromCallSite from
+ // JITResolverState.
+ std::map<void*, JITResolver*>::const_iterator I = Map.upper_bound(Stub);
+ assert(I != Map.begin() && "This is not a known stub!");
+ --I;
+ return I->second;
+ }
+ /// True if any stubs refer to the given resolver. Only used in an assert().
+ /// O(N)
+ bool ResolverHasStubs(JITResolver* Resolver) const {
+ MutexGuard guard(Lock);
+ for (std::map<void*, JITResolver*>::const_iterator I = Map.begin(),
+ E = Map.end(); I != E; ++I) {
+ if (I->second == Resolver)
+ return true;
+ }
+ return false;
+ }
+ };
+ /// This needs to be static so that a lazy call stub can access it with no
+ /// context except the address of the stub.
+ ManagedStatic<StubToResolverMapTy> StubToResolverMap;
+
/// JITEmitter - The JIT implementation of the MachineCodeEmitter, which is
/// used to output functions to memory for execution.
class JITEmitter : public JITCodeEmitter {
JITMemoryManager *MemMgr;
+ // When outputting a function stub in the context of some other function, we
+ // save BufferBegin/BufferEnd/CurBufferPtr here.
+ uint8_t *SavedBufferBegin, *SavedBufferEnd, *SavedCurBufferPtr;
+
// When reattempting to JIT a function after running out of space, we store
// the estimated size of the function we're trying to JIT here, so we can
// ask the memory manager for at least this much space. When we
/// Resolver - This contains info about the currently resolved functions.
JITResolver Resolver;
- /// DE - The dwarf emitter for the jit.
- OwningPtr<JITDwarfEmitter> DE;
-
- /// DR - The debug registerer for the jit.
- OwningPtr<JITDebugRegisterer> DR;
-
/// LabelLocations - This vector is a mapping from Label ID's to their
/// address.
- std::vector<uintptr_t> LabelLocations;
+ DenseMap<MCSymbol*, uintptr_t> LabelLocations;
/// MMI - Machine module info for exception informations
MachineModuleInfo* MMI;
- // GVSet - a set to keep track of which globals have been seen
- SmallPtrSet<const GlobalVariable*, 8> GVSet;
-
// CurFn - The llvm function being emitted. Only valid during
// finishFunction().
const Function *CurFn;
ValueMap<const Function *, EmittedCode,
EmittedFunctionConfig> EmittedFunctions;
- // CurFnStubUses - For a given Function, a vector of stubs that it
- // references. This facilitates the JIT detecting that a stub is no
- // longer used, so that it may be deallocated.
- DenseMap<AssertingVH<const Function>, SmallVector<void*, 1> > CurFnStubUses;
+ DebugLoc PrevDL;
- // StubFnRefs - For a given pointer to a stub, a set of Functions which
- // reference the stub. When the count of a stub's references drops to zero,
- // the stub is unused.
- DenseMap<void *, SmallPtrSet<const Function*, 1> > StubFnRefs;
-
- DebugLocTuple PrevDLT;
+ /// Instance of the JIT
+ JIT *TheJIT;
public:
JITEmitter(JIT &jit, JITMemoryManager *JMM, TargetMachine &TM)
: SizeEstimate(0), Resolver(jit, *this), MMI(0), CurFn(0),
- EmittedFunctions(this) {
+ EmittedFunctions(this), TheJIT(&jit) {
MemMgr = JMM ? JMM : JITMemoryManager::CreateDefaultMemManager();
if (jit.getJITInfo().needsGOT()) {
MemMgr->AllocateGOT();
- DEBUG(errs() << "JIT is managing a GOT\n");
+ DEBUG(dbgs() << "JIT is managing a GOT\n");
}
- if (DwarfExceptionHandling || JITEmitDebugInfo) {
- DE.reset(new JITDwarfEmitter(jit));
- }
- if (JITEmitDebugInfo) {
- DR.reset(new JITDebugRegisterer(TM));
- }
}
~JITEmitter() {
delete MemMgr;
}
- /// classof - Methods for support type inquiry through isa, cast, and
- /// dyn_cast:
- ///
- static inline bool classof(const JITEmitter*) { return true; }
- static inline bool classof(const MachineCodeEmitter*) { return true; }
-
JITResolver &getJITResolver() { return Resolver; }
virtual void startFunction(MachineFunction &F);
void initJumpTableInfo(MachineJumpTableInfo *MJTI);
void emitJumpTableInfo(MachineJumpTableInfo *MJTI);
- virtual void startGVStub(BufferState &BS, const GlobalValue* GV,
- unsigned StubSize, unsigned Alignment = 1);
- virtual void startGVStub(BufferState &BS, void *Buffer,
- unsigned StubSize);
- virtual void* finishGVStub(BufferState &BS);
+ void startGVStub(const GlobalValue* GV,
+ unsigned StubSize, unsigned Alignment = 1);
+ void startGVStub(void *Buffer, unsigned StubSize);
+ void finishGVStub();
+ virtual void *allocIndirectGV(const GlobalValue *GV,
+ const uint8_t *Buffer, size_t Size,
+ unsigned Alignment);
/// allocateSpace - Reserves space in the current block if any, or
/// allocate a new one of the given size.
if (MBBLocations.size() <= (unsigned)MBB->getNumber())
MBBLocations.resize((MBB->getNumber()+1)*2);
MBBLocations[MBB->getNumber()] = getCurrentPCValue();
- DEBUG(errs() << "JIT: Emitting BB" << MBB->getNumber() << " at ["
+ if (MBB->hasAddressTaken())
+ TheJIT->addPointerToBasicBlock(MBB->getBasicBlock(),
+ (void*)getCurrentPCValue());
+ DEBUG(dbgs() << "JIT: Emitting BB" << MBB->getNumber() << " at ["
<< (void*) getCurrentPCValue() << "]\n");
}
virtual uintptr_t getConstantPoolEntryAddress(unsigned Entry) const;
virtual uintptr_t getJumpTableEntryAddress(unsigned Entry) const;
- virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const {
+ virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const{
assert(MBBLocations.size() > (unsigned)MBB->getNumber() &&
MBBLocations[MBB->getNumber()] && "MBB not emitted!");
return MBBLocations[MBB->getNumber()];
/// function body.
void deallocateMemForFunction(const Function *F);
- /// AddStubToCurrentFunction - Mark the current function being JIT'd as
- /// using the stub at the specified address. Allows
- /// deallocateMemForFunction to also remove stubs no longer referenced.
- void AddStubToCurrentFunction(void *Stub);
-
virtual void processDebugLoc(DebugLoc DL, bool BeforePrintingInsn);
- virtual void emitLabel(uint64_t LabelID) {
- if (LabelLocations.size() <= LabelID)
- LabelLocations.resize((LabelID+1)*2);
- LabelLocations[LabelID] = getCurrentPCValue();
+ virtual void emitLabel(MCSymbol *Label) {
+ LabelLocations[Label] = getCurrentPCValue();
}
- virtual uintptr_t getLabelAddress(uint64_t LabelID) const {
- assert(LabelLocations.size() > (unsigned)LabelID &&
- LabelLocations[LabelID] && "Label not emitted!");
- return LabelLocations[LabelID];
+ virtual DenseMap<MCSymbol*, uintptr_t> *getLabelLocations() {
+ return &LabelLocations;
}
- virtual void setModuleInfo(MachineModuleInfo* Info) {
- MMI = Info;
- if (DE.get()) DE->setModuleInfo(Info);
+ virtual uintptr_t getLabelAddress(MCSymbol *Label) const {
+ assert(LabelLocations.count(Label) && "Label not emitted!");
+ return LabelLocations.find(Label)->second;
}
- void setMemoryExecutable() {
- MemMgr->setMemoryExecutable();
+ virtual void setModuleInfo(MachineModuleInfo* Info) {
+ MMI = Info;
}
- JITMemoryManager *getMemMgr() const { return MemMgr; }
-
private:
void *getPointerToGlobal(GlobalValue *GV, void *Reference,
bool MayNeedFarStub);
void *getPointerToGVIndirectSym(GlobalValue *V, void *Reference);
- unsigned addSizeOfGlobal(const GlobalVariable *GV, unsigned Size);
- unsigned addSizeOfGlobalsInConstantVal(const Constant *C, unsigned Size);
- unsigned addSizeOfGlobalsInInitializer(const Constant *Init, unsigned Size);
- unsigned GetSizeOfGlobalsInBytes(MachineFunction &MF);
};
}
-JITResolver *JITResolver::TheJITResolver = 0;
-
void CallSiteValueMapConfig::onDelete(JITResolverState *JRS, Function *F) {
- JRS->EraseAllCallSitesPrelocked(F);
+ JRS->EraseAllCallSitesForPrelocked(F);
+}
+
+void JITResolverState::EraseAllCallSitesForPrelocked(Function *F) {
+ FunctionToCallSitesMapTy::iterator F2C = FunctionToCallSitesMap.find(F);
+ if (F2C == FunctionToCallSitesMap.end())
+ return;
+ StubToResolverMapTy &S2RMap = *StubToResolverMap;
+ for (SmallPtrSet<void*, 1>::const_iterator I = F2C->second.begin(),
+ E = F2C->second.end(); I != E; ++I) {
+ S2RMap.UnregisterStubResolver(*I);
+ bool Erased = CallSiteToFunctionMap.erase(*I);
+ (void)Erased;
+ assert(Erased && "Missing call site->function mapping");
+ }
+ FunctionToCallSitesMap.erase(F2C);
+}
+
+void JITResolverState::EraseAllCallSitesPrelocked() {
+ StubToResolverMapTy &S2RMap = *StubToResolverMap;
+ for (CallSiteToFunctionMapTy::const_iterator
+ I = CallSiteToFunctionMap.begin(),
+ E = CallSiteToFunctionMap.end(); I != E; ++I) {
+ S2RMap.UnregisterStubResolver(I->first);
+ }
+ CallSiteToFunctionMap.clear();
+ FunctionToCallSitesMap.clear();
+}
+
+JITResolver::~JITResolver() {
+ // No need to lock because we're in the destructor, and state isn't shared.
+ state.EraseAllCallSitesPrelocked();
+ assert(!StubToResolverMap->ResolverHasStubs(this) &&
+ "Resolver destroyed with stubs still alive.");
}
/// getLazyFunctionStubIfAvailable - This returns a pointer to a function stub
// If this is an external declaration, attempt to resolve the address now
// to place in the stub.
- if (F->isDeclaration() && !F->hasNotBeenReadFromBitcode()) {
+ if (isNonGhostDeclaration(F) || F->hasAvailableExternallyLinkage()) {
Actual = TheJIT->getPointerToFunction(F);
// If we resolved the symbol to a null address (eg. a weak external)
if (!Actual) return 0;
}
- MachineCodeEmitter::BufferState BS;
TargetJITInfo::StubLayout SL = TheJIT->getJITInfo().getStubLayout();
- JE.startGVStub(BS, F, SL.Size, SL.Alignment);
+ JE.startGVStub(F, SL.Size, SL.Alignment);
// Codegen a new stub, calling the lazy resolver or the actual address of the
// external function, if it was resolved.
Stub = TheJIT->getJITInfo().emitFunctionStub(F, Actual, JE);
- JE.finishGVStub(BS);
+ JE.finishGVStub();
if (Actual != (void*)(intptr_t)LazyResolverFn) {
// If we are getting the stub for an external function, we really want the
TheJIT->updateGlobalMapping(F, Stub);
}
- DEBUG(errs() << "JIT: Lazy stub emitted at [" << Stub << "] for function '"
+ DEBUG(dbgs() << "JIT: Lazy stub emitted at [" << Stub << "] for function '"
<< F->getName() << "'\n");
- // Finally, keep track of the stub-to-Function mapping so that the
- // JITCompilerFn knows which function to compile!
- state.AddCallSite(locked, Stub, F);
-
- // If we are JIT'ing non-lazily but need to call a function that does not
- // exist yet, add it to the JIT's work list so that we can fill in the stub
- // address later.
- if (!Actual && !TheJIT->isCompilingLazily())
- if (!F->isDeclaration() || F->hasNotBeenReadFromBitcode())
- TheJIT->addPendingFunction(F);
+ if (TheJIT->isCompilingLazily()) {
+ // Register this JITResolver as the one corresponding to this call site so
+ // JITCompilerFn will be able to find it.
+ StubToResolverMap->RegisterStubResolver(Stub, this);
+
+ // Finally, keep track of the stub-to-Function mapping so that the
+ // JITCompilerFn knows which function to compile!
+ state.AddCallSite(locked, Stub, F);
+ } else if (!Actual) {
+ // If we are JIT'ing non-lazily but need to call a function that does not
+ // exist yet, add it to the JIT's work list so that we can fill in the
+ // stub address later.
+ assert(!isNonGhostDeclaration(F) && !F->hasAvailableExternallyLinkage() &&
+ "'Actual' should have been set above.");
+ TheJIT->addPendingFunction(F);
+ }
return Stub;
}
IndirectSym = TheJIT->getJITInfo().emitGlobalValueIndirectSym(GV, GVAddress,
JE);
- DEBUG(errs() << "JIT: Indirect symbol emitted at [" << IndirectSym
+ DEBUG(dbgs() << "JIT: Indirect symbol emitted at [" << IndirectSym
<< "] for GV '" << GV->getName() << "'\n");
return IndirectSym;
void *&Stub = ExternalFnToStubMap[FnAddr];
if (Stub) return Stub;
- MachineCodeEmitter::BufferState BS;
TargetJITInfo::StubLayout SL = TheJIT->getJITInfo().getStubLayout();
- JE.startGVStub(BS, 0, SL.Size, SL.Alignment);
+ JE.startGVStub(0, SL.Size, SL.Alignment);
Stub = TheJIT->getJITInfo().emitFunctionStub(0, FnAddr, JE);
- JE.finishGVStub(BS);
+ JE.finishGVStub();
- DEBUG(errs() << "JIT: Stub emitted at [" << Stub
+ DEBUG(dbgs() << "JIT: Stub emitted at [" << Stub
<< "] for external function at '" << FnAddr << "'\n");
return Stub;
}
if (!idx) {
idx = ++nextGOTIndex;
revGOTMap[addr] = idx;
- DEBUG(errs() << "JIT: Adding GOT entry " << idx << " for addr ["
+ DEBUG(dbgs() << "JIT: Adding GOT entry " << idx << " for addr ["
<< addr << "]\n");
}
return idx;
}
-void JITResolver::getRelocatableGVs(SmallVectorImpl<GlobalValue*> &GVs,
- SmallVectorImpl<void*> &Ptrs) {
- MutexGuard locked(TheJIT->lock);
-
- const FunctionToLazyStubMapTy &FM = state.getFunctionToLazyStubMap(locked);
- GlobalToIndirectSymMapTy &GM = state.getGlobalToIndirectSymMap(locked);
-
- for (FunctionToLazyStubMapTy::const_iterator i = FM.begin(), e = FM.end();
- i != e; ++i){
- Function *F = i->first;
- if (F->isDeclaration() && F->hasExternalLinkage()) {
- GVs.push_back(i->first);
- Ptrs.push_back(i->second);
- }
- }
- for (GlobalToIndirectSymMapTy::iterator i = GM.begin(), e = GM.end();
- i != e; ++i) {
- GVs.push_back(i->first);
- Ptrs.push_back(i->second);
- }
-}
-
-GlobalValue *JITResolver::invalidateStub(void *Stub) {
- MutexGuard locked(TheJIT->lock);
-
- GlobalToIndirectSymMapTy &GM = state.getGlobalToIndirectSymMap(locked);
-
- // Look up the cheap way first, to see if it's a function stub we are
- // invalidating. If so, remove it from both the forward and reverse maps.
- if (Function *F = state.EraseStub(locked, Stub)) {
- return F;
- }
-
- // Otherwise, it might be an indirect symbol stub. Find it and remove it.
- for (GlobalToIndirectSymMapTy::iterator i = GM.begin(), e = GM.end();
- i != e; ++i) {
- if (i->second != Stub)
- continue;
- GlobalValue *GV = i->first;
- GM.erase(i);
- return GV;
- }
-
- // Lastly, check to see if it's in the ExternalFnToStubMap.
- for (std::map<void *, void *>::iterator i = ExternalFnToStubMap.begin(),
- e = ExternalFnToStubMap.end(); i != e; ++i) {
- if (i->second != Stub)
- continue;
- ExternalFnToStubMap.erase(i);
- break;
- }
-
- return 0;
-}
-
/// JITCompilerFn - This function is called when a lazy compilation stub has
/// been entered. It looks up which function this stub corresponds to, compiles
/// it if necessary, then returns the resultant function pointer.
void *JITResolver::JITCompilerFn(void *Stub) {
- JITResolver &JR = *TheJITResolver;
+ JITResolver *JR = StubToResolverMap->getResolverFromStub(Stub);
+ assert(JR && "Unable to find the corresponding JITResolver to the call site");
Function* F = 0;
void* ActualPtr = 0;
// Only lock for getting the Function. The call getPointerToFunction made
// in this function might trigger function materializing, which requires
// JIT lock to be unlocked.
- MutexGuard locked(TheJIT->lock);
+ MutexGuard locked(JR->TheJIT->lock);
// The address given to us for the stub may not be exactly right, it might
// be a little bit after the stub. As such, use upper_bound to find it.
- pair<void*, Function*> I =
- JR.state.LookupFunctionFromCallSite(locked, Stub);
+ std::pair<void*, Function*> I =
+ JR->state.LookupFunctionFromCallSite(locked, Stub);
F = I.second;
ActualPtr = I.first;
}
// If we have already code generated the function, just return the address.
- void *Result = TheJIT->getPointerToGlobalIfAvailable(F);
+ void *Result = JR->TheJIT->getPointerToGlobalIfAvailable(F);
if (!Result) {
// Otherwise we don't have it, do lazy compilation now.
// If lazy compilation is disabled, emit a useful error message and abort.
- if (!TheJIT->isCompilingLazily()) {
- llvm_report_error("LLVM JIT requested to do lazy compilation of function '"
+ if (!JR->TheJIT->isCompilingLazily()) {
+ report_fatal_error("LLVM JIT requested to do lazy compilation of"
+ " function '"
+ F->getName() + "' when lazy compiles are disabled!");
}
- DEBUG(errs() << "JIT: Lazily resolving function '" << F->getName()
+ DEBUG(dbgs() << "JIT: Lazily resolving function '" << F->getName()
<< "' In stub ptr = " << Stub << " actual ptr = "
<< ActualPtr << "\n");
+ (void)ActualPtr;
- Result = TheJIT->getPointerToFunction(F);
+ Result = JR->TheJIT->getPointerToFunction(F);
}
// Reacquire the lock to update the GOT map.
- MutexGuard locked(TheJIT->lock);
+ MutexGuard locked(JR->TheJIT->lock);
// We might like to remove the call site from the CallSiteToFunction map, but
// we can't do that! Multiple threads could be stuck, waiting to acquire the
// if they see it still using the stub address.
// Note: this is done so the Resolver doesn't have to manage GOT memory
// Do this without allocating map space if the target isn't using a GOT
- if(JR.revGOTMap.find(Stub) != JR.revGOTMap.end())
- JR.revGOTMap[Result] = JR.revGOTMap[Stub];
+ if(JR->revGOTMap.find(Stub) != JR->revGOTMap.end())
+ JR->revGOTMap[Result] = JR->revGOTMap[Stub];
return Result;
}
// that we're returning the same address for the function as any previous
// call. TODO: Yes, this is wrong. The lazy stub isn't guaranteed to be
// close enough to call.
- AddStubToCurrentFunction(FnStub);
return FnStub;
}
// If this is an external function pointer, we can force the JIT to
// 'compile' it, which really just adds it to the map.
- if (F->isDeclaration() && !F->hasNotBeenReadFromBitcode())
+ if (isNonGhostDeclaration(F) || F->hasAvailableExternallyLinkage())
return TheJIT->getPointerToFunction(F);
}
- // Otherwise, we may need a to emit a stub, and, conservatively, we
- // always do so.
- void *StubAddr = Resolver.getLazyFunctionStub(F);
-
- // Add the stub to the current function's list of referenced stubs, so we can
- // deallocate them if the current function is ever freed. It's possible to
- // return null from getLazyFunctionStub in the case of a weak extern that
- // fails to resolve.
- if (StubAddr)
- AddStubToCurrentFunction(StubAddr);
-
- return StubAddr;
+ // Otherwise, we may need a to emit a stub, and, conservatively, we always do
+ // so. Note that it's possible to return null from getLazyFunctionStub in the
+ // case of a weak extern that fails to resolve.
+ return Resolver.getLazyFunctionStub(F);
}
void *JITEmitter::getPointerToGVIndirectSym(GlobalValue *V, void *Reference) {
// resolved address.
void *GVAddress = getPointerToGlobal(V, Reference, false);
void *StubAddr = Resolver.getGlobalValueIndirectSym(V, GVAddress);
-
- // Add the stub to the current function's list of referenced stubs, so we can
- // deallocate them if the current function is ever freed.
- AddStubToCurrentFunction(StubAddr);
-
return StubAddr;
}
-void JITEmitter::AddStubToCurrentFunction(void *StubAddr) {
- assert(CurFn && "Stub added to current function, but current function is 0!");
-
- SmallVectorImpl<void*> &StubsUsed = CurFnStubUses[CurFn];
- StubsUsed.push_back(StubAddr);
-
- SmallPtrSet<const Function *, 1> &FnRefs = StubFnRefs[StubAddr];
- FnRefs.insert(CurFn);
-}
-
void JITEmitter::processDebugLoc(DebugLoc DL, bool BeforePrintingInsn) {
- if (!DL.isUnknown()) {
- DebugLocTuple CurDLT = EmissionDetails.MF->getDebugLocTuple(DL);
-
- if (BeforePrintingInsn) {
- if (CurDLT.Scope != 0 && PrevDLT != CurDLT) {
- JITEvent_EmittedFunctionDetails::LineStart NextLine;
- NextLine.Address = getCurrentPCValue();
- NextLine.Loc = DL;
- EmissionDetails.LineStarts.push_back(NextLine);
- }
+ if (DL.isUnknown()) return;
+ if (!BeforePrintingInsn) return;
- PrevDLT = CurDLT;
- }
+ const LLVMContext &Context = EmissionDetails.MF->getFunction()->getContext();
+
+ if (DL.getScope(Context) != 0 && PrevDL != DL) {
+ JITEvent_EmittedFunctionDetails::LineStart NextLine;
+ NextLine.Address = getCurrentPCValue();
+ NextLine.Loc = DL;
+ EmissionDetails.LineStarts.push_back(NextLine);
}
+
+ PrevDL = DL;
}
static unsigned GetConstantPoolSizeInBytes(MachineConstantPool *MCP,
- const TargetData *TD) {
+ const DataLayout *TD) {
const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
if (Constants.empty()) return 0;
MachineConstantPoolEntry CPE = Constants[i];
unsigned AlignMask = CPE.getAlignment() - 1;
Size = (Size + AlignMask) & ~AlignMask;
- const Type *Ty = CPE.getType();
+ Type *Ty = CPE.getType();
Size += TD->getTypeAllocSize(Ty);
}
return Size;
}
-static unsigned GetJumpTableSizeInBytes(MachineJumpTableInfo *MJTI) {
- const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
- if (JT.empty()) return 0;
-
- unsigned NumEntries = 0;
- for (unsigned i = 0, e = JT.size(); i != e; ++i)
- NumEntries += JT[i].MBBs.size();
-
- unsigned EntrySize = MJTI->getEntrySize();
-
- return NumEntries * EntrySize;
-}
-
-static uintptr_t RoundUpToAlign(uintptr_t Size, unsigned Alignment) {
- if (Alignment == 0) Alignment = 1;
- // Since we do not know where the buffer will be allocated, be pessimistic.
- return Size + Alignment;
-}
-
-/// addSizeOfGlobal - add the size of the global (plus any alignment padding)
-/// into the running total Size.
-
-unsigned JITEmitter::addSizeOfGlobal(const GlobalVariable *GV, unsigned Size) {
- const Type *ElTy = GV->getType()->getElementType();
- size_t GVSize = (size_t)TheJIT->getTargetData()->getTypeAllocSize(ElTy);
- size_t GVAlign =
- (size_t)TheJIT->getTargetData()->getPreferredAlignment(GV);
- DEBUG(errs() << "JIT: Adding in size " << GVSize << " alignment " << GVAlign);
- DEBUG(GV->dump());
- // Assume code section ends with worst possible alignment, so first
- // variable needs maximal padding.
- if (Size==0)
- Size = 1;
- Size = ((Size+GVAlign-1)/GVAlign)*GVAlign;
- Size += GVSize;
- return Size;
-}
-
-/// addSizeOfGlobalsInConstantVal - find any globals that we haven't seen yet
-/// but are referenced from the constant; put them in GVSet and add their
-/// size into the running total Size.
-
-unsigned JITEmitter::addSizeOfGlobalsInConstantVal(const Constant *C,
- unsigned Size) {
- // If its undefined, return the garbage.
- if (isa<UndefValue>(C))
- return Size;
-
- // If the value is a ConstantExpr
- if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
- Constant *Op0 = CE->getOperand(0);
- switch (CE->getOpcode()) {
- case Instruction::GetElementPtr:
- 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:
- case Instruction::PtrToInt:
- case Instruction::IntToPtr:
- case Instruction::BitCast: {
- Size = addSizeOfGlobalsInConstantVal(Op0, Size);
- break;
- }
- case Instruction::Add:
- case Instruction::FAdd:
- case Instruction::Sub:
- case Instruction::FSub:
- case Instruction::Mul:
- case Instruction::FMul:
- case Instruction::UDiv:
- case Instruction::SDiv:
- case Instruction::URem:
- case Instruction::SRem:
- case Instruction::And:
- case Instruction::Or:
- case Instruction::Xor: {
- Size = addSizeOfGlobalsInConstantVal(Op0, Size);
- Size = addSizeOfGlobalsInConstantVal(CE->getOperand(1), Size);
- break;
- }
- default: {
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "ConstantExpr not handled: " << *CE;
- llvm_report_error(Msg.str());
- }
- }
- }
-
- if (C->getType()->getTypeID() == Type::PointerTyID)
- if (const GlobalVariable* GV = dyn_cast<GlobalVariable>(C))
- if (GVSet.insert(GV))
- Size = addSizeOfGlobal(GV, Size);
-
- return Size;
-}
-
-/// addSizeOfGLobalsInInitializer - handle any globals that we haven't seen yet
-/// but are referenced from the given initializer.
-
-unsigned JITEmitter::addSizeOfGlobalsInInitializer(const Constant *Init,
- unsigned Size) {
- if (!isa<UndefValue>(Init) &&
- !isa<ConstantVector>(Init) &&
- !isa<ConstantAggregateZero>(Init) &&
- !isa<ConstantArray>(Init) &&
- !isa<ConstantStruct>(Init) &&
- Init->getType()->isFirstClassType())
- Size = addSizeOfGlobalsInConstantVal(Init, Size);
- return Size;
-}
-
-/// GetSizeOfGlobalsInBytes - walk the code for the function, looking for
-/// globals; then walk the initializers of those globals looking for more.
-/// If their size has not been considered yet, add it into the running total
-/// Size.
-
-unsigned JITEmitter::GetSizeOfGlobalsInBytes(MachineFunction &MF) {
- unsigned Size = 0;
- GVSet.clear();
-
- for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
- MBB != E; ++MBB) {
- for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
- I != E; ++I) {
- const TargetInstrDesc &Desc = I->getDesc();
- const MachineInstr &MI = *I;
- unsigned NumOps = Desc.getNumOperands();
- for (unsigned CurOp = 0; CurOp < NumOps; CurOp++) {
- const MachineOperand &MO = MI.getOperand(CurOp);
- if (MO.isGlobal()) {
- GlobalValue* V = MO.getGlobal();
- const GlobalVariable *GV = dyn_cast<const GlobalVariable>(V);
- if (!GV)
- continue;
- // If seen in previous function, it will have an entry here.
- if (TheJIT->getPointerToGlobalIfAvailable(GV))
- continue;
- // If seen earlier in this function, it will have an entry here.
- // FIXME: it should be possible to combine these tables, by
- // assuming the addresses of the new globals in this module
- // start at 0 (or something) and adjusting them after codegen
- // complete. Another possibility is to grab a marker bit in GV.
- if (GVSet.insert(GV))
- // A variable as yet unseen. Add in its size.
- Size = addSizeOfGlobal(GV, Size);
- }
- }
- }
- }
- DEBUG(errs() << "JIT: About to look through initializers\n");
- // Look for more globals that are referenced only from initializers.
- // GVSet.end is computed each time because the set can grow as we go.
- for (SmallPtrSet<const GlobalVariable *, 8>::iterator I = GVSet.begin();
- I != GVSet.end(); I++) {
- const GlobalVariable* GV = *I;
- if (GV->hasInitializer())
- Size = addSizeOfGlobalsInInitializer(GV->getInitializer(), Size);
- }
-
- return Size;
-}
-
void JITEmitter::startFunction(MachineFunction &F) {
- DEBUG(errs() << "JIT: Starting CodeGen of Function "
- << F.getFunction()->getName() << "\n");
+ DEBUG(dbgs() << "JIT: Starting CodeGen of Function "
+ << F.getName() << "\n");
uintptr_t ActualSize = 0;
// Set the memory writable, if it's not already
MemMgr->setMemoryWritable();
- if (MemMgr->NeedsExactSize()) {
- DEBUG(errs() << "JIT: ExactSize\n");
- const TargetInstrInfo* TII = F.getTarget().getInstrInfo();
- MachineJumpTableInfo *MJTI = F.getJumpTableInfo();
- MachineConstantPool *MCP = F.getConstantPool();
-
- // Ensure the constant pool/jump table info is at least 4-byte aligned.
- ActualSize = RoundUpToAlign(ActualSize, 16);
- // Add the alignment of the constant pool
- ActualSize = RoundUpToAlign(ActualSize, MCP->getConstantPoolAlignment());
-
- // Add the constant pool size
- ActualSize += GetConstantPoolSizeInBytes(MCP, TheJIT->getTargetData());
-
- // Add the aligment of the jump table info
- ActualSize = RoundUpToAlign(ActualSize, MJTI->getAlignment());
-
- // Add the jump table size
- ActualSize += GetJumpTableSizeInBytes(MJTI);
-
- // Add the alignment for the function
- ActualSize = RoundUpToAlign(ActualSize,
- std::max(F.getFunction()->getAlignment(), 8U));
-
- // Add the function size
- ActualSize += TII->GetFunctionSizeInBytes(F);
-
- DEBUG(errs() << "JIT: ActualSize before globals " << ActualSize << "\n");
- // Add the size of the globals that will be allocated after this function.
- // These are all the ones referenced from this function that were not
- // previously allocated.
- ActualSize += GetSizeOfGlobalsInBytes(F);
- DEBUG(errs() << "JIT: ActualSize after globals " << ActualSize << "\n");
- } else if (SizeEstimate > 0) {
+ if (SizeEstimate > 0) {
// SizeEstimate will be non-zero on reallocation attempts.
ActualSize = SizeEstimate;
}
emitAlignment(16);
emitConstantPool(F.getConstantPool());
- initJumpTableInfo(F.getJumpTableInfo());
+ if (MachineJumpTableInfo *MJTI = F.getJumpTableInfo())
+ initJumpTableInfo(MJTI);
// About to start emitting the machine code for the function.
emitAlignment(std::max(F.getFunction()->getAlignment(), 8U));
return true;
}
- emitJumpTableInfo(F.getJumpTableInfo());
+ if (MachineJumpTableInfo *MJTI = F.getJumpTableInfo())
+ emitJumpTableInfo(MJTI);
// FnStart is the start of the text, not the start of the constant pool and
// other per-function data.
if (MR.isExternalSymbol()) {
ResultPtr = TheJIT->getPointerToNamedFunction(MR.getExternalSymbol(),
false);
- DEBUG(errs() << "JIT: Map \'" << MR.getExternalSymbol() << "\' to ["
+ DEBUG(dbgs() << "JIT: Map \'" << MR.getExternalSymbol() << "\' to ["
<< ResultPtr << "]\n");
// If the target REALLY wants a stub for this function, emit it now.
} else if (MR.isBasicBlock()) {
ResultPtr = (void*)getMachineBasicBlockAddress(MR.getBasicBlock());
} else if (MR.isConstantPoolIndex()) {
- ResultPtr = (void*)getConstantPoolEntryAddress(MR.getConstantPoolIndex());
+ ResultPtr =
+ (void*)getConstantPoolEntryAddress(MR.getConstantPoolIndex());
} else {
assert(MR.isJumpTableIndex());
ResultPtr=(void*)getJumpTableEntryAddress(MR.getJumpTableIndex());
unsigned idx = Resolver.getGOTIndexForAddr(ResultPtr);
MR.setGOTIndex(idx);
if (((void**)MemMgr->getGOTBase())[idx] != ResultPtr) {
- DEBUG(errs() << "JIT: GOT was out of date for " << ResultPtr
+ DEBUG(dbgs() << "JIT: GOT was out of date for " << ResultPtr
<< " pointing at " << ((void**)MemMgr->getGOTBase())[idx]
<< "\n");
((void**)MemMgr->getGOTBase())[idx] = ResultPtr;
if (MemMgr->isManagingGOT()) {
unsigned idx = Resolver.getGOTIndexForAddr((void*)BufferBegin);
if (((void**)MemMgr->getGOTBase())[idx] != (void*)BufferBegin) {
- DEBUG(errs() << "JIT: GOT was out of date for " << (void*)BufferBegin
+ DEBUG(dbgs() << "JIT: GOT was out of date for " << (void*)BufferBegin
<< " pointing at " << ((void**)MemMgr->getGOTBase())[idx]
<< "\n");
((void**)MemMgr->getGOTBase())[idx] = (void*)BufferBegin;
TheJIT->NotifyFunctionEmitted(*F.getFunction(), FnStart, FnEnd-FnStart,
EmissionDetails);
- DEBUG(errs() << "JIT: Finished CodeGen of [" << (void*)FnStart
- << "] Function: " << F.getFunction()->getName()
+ // Reset the previous debug location.
+ PrevDL = DebugLoc();
+
+ DEBUG(dbgs() << "JIT: Finished CodeGen of [" << (void*)FnStart
+ << "] Function: " << F.getName()
<< ": " << (FnEnd-FnStart) << " bytes of text, "
<< Relocations.size() << " relocations\n");
// Mark code region readable and executable if it's not so already.
MemMgr->setMemoryExecutable();
- DEBUG(
- if (sys::hasDisassembler()) {
- errs() << "JIT: Disassembled code:\n";
- errs() << sys::disassembleBuffer(FnStart, FnEnd-FnStart,
- (uintptr_t)FnStart);
- } else {
- errs() << "JIT: Binary code:\n";
- uint8_t* q = FnStart;
- for (int i = 0; q < FnEnd; q += 4, ++i) {
- if (i == 4)
- i = 0;
- if (i == 0)
- errs() << "JIT: " << (long)(q - FnStart) << ": ";
- bool Done = false;
- for (int j = 3; j >= 0; --j) {
- if (q + j >= FnEnd)
- Done = true;
- else
- errs() << (unsigned short)q[j];
+ DEBUG({
+ if (sys::hasDisassembler()) {
+ dbgs() << "JIT: Disassembled code:\n";
+ dbgs() << sys::disassembleBuffer(FnStart, FnEnd-FnStart,
+ (uintptr_t)FnStart);
+ } else {
+ dbgs() << "JIT: Binary code:\n";
+ uint8_t* q = FnStart;
+ for (int i = 0; q < FnEnd; q += 4, ++i) {
+ if (i == 4)
+ i = 0;
+ if (i == 0)
+ dbgs() << "JIT: " << (long)(q - FnStart) << ": ";
+ bool Done = false;
+ for (int j = 3; j >= 0; --j) {
+ if (q + j >= FnEnd)
+ Done = true;
+ else
+ dbgs() << (unsigned short)q[j];
+ }
+ if (Done)
+ break;
+ dbgs() << ' ';
+ if (i == 3)
+ dbgs() << '\n';
}
- if (Done)
- break;
- errs() << ' ';
- if (i == 3)
- errs() << '\n';
+ dbgs()<< '\n';
}
- errs()<< '\n';
- }
- );
-
- if (DwarfExceptionHandling || JITEmitDebugInfo) {
- uintptr_t ActualSize = 0;
- BufferState BS;
- SaveStateTo(BS);
-
- if (MemMgr->NeedsExactSize()) {
- ActualSize = DE->GetDwarfTableSizeInBytes(F, *this, FnStart, FnEnd);
- }
-
- BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(),
- ActualSize);
- BufferEnd = BufferBegin+ActualSize;
- EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin;
- uint8_t *EhStart;
- uint8_t *FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd,
- EhStart);
- MemMgr->endExceptionTable(F.getFunction(), BufferBegin, CurBufferPtr,
- FrameRegister);
- uint8_t *EhEnd = CurBufferPtr;
- RestoreStateFrom(BS);
-
- if (DwarfExceptionHandling) {
- TheJIT->RegisterTable(FrameRegister);
- }
-
- if (JITEmitDebugInfo) {
- DebugInfo I;
- I.FnStart = FnStart;
- I.FnEnd = FnEnd;
- I.EhStart = EhStart;
- I.EhEnd = EhEnd;
- DR->RegisterFunction(F.getFunction(), I);
- }
- }
+ });
if (MMI)
MMI->EndFunction();
}
void JITEmitter::retryWithMoreMemory(MachineFunction &F) {
- DEBUG(errs() << "JIT: Ran out of space for native code. Reattempting.\n");
+ DEBUG(dbgs() << "JIT: Ran out of space for native code. Reattempting.\n");
Relocations.clear(); // Clear the old relocations or we'll reapply them.
ConstPoolAddresses.clear();
++NumRetries;
deallocateMemForFunction(F.getFunction());
// Try again with at least twice as much free space.
SizeEstimate = (uintptr_t)(2 * (BufferEnd - BufferBegin));
+
+ for (MachineFunction::iterator MBB = F.begin(), E = F.end(); MBB != E; ++MBB){
+ if (MBB->hasAddressTaken())
+ TheJIT->clearPointerToBasicBlock(MBB->getBasicBlock());
+ }
}
/// deallocateMemForFunction - Deallocate all memory for the specified
Emitted = EmittedFunctions.find(F);
if (Emitted != EmittedFunctions.end()) {
MemMgr->deallocateFunctionBody(Emitted->second.FunctionBody);
- MemMgr->deallocateExceptionTable(Emitted->second.ExceptionTable);
TheJIT->NotifyFreeingMachineCode(Emitted->second.Code);
EmittedFunctions.erase(Emitted);
}
-
- // TODO: Do we need to unregister exception handling information from libgcc
- // here?
-
- if (JITEmitDebugInfo) {
- DR->UnregisterFunction(F);
- }
-
- // If the function did not reference any stubs, return.
- if (CurFnStubUses.find(F) == CurFnStubUses.end())
- return;
-
- // For each referenced stub, erase the reference to this function, and then
- // erase the list of referenced stubs.
- SmallVectorImpl<void *> &StubList = CurFnStubUses[F];
- for (unsigned i = 0, e = StubList.size(); i != e; ++i) {
- void *Stub = StubList[i];
-
- // If we already invalidated this stub for this function, continue.
- if (StubFnRefs.count(Stub) == 0)
- continue;
-
- SmallPtrSet<const Function *, 1> &FnRefs = StubFnRefs[Stub];
- FnRefs.erase(F);
-
- // If this function was the last reference to the stub, invalidate the stub
- // in the JITResolver. Were there a memory manager deallocateStub routine,
- // we could call that at this point too.
- if (FnRefs.empty()) {
- DEBUG(errs() << "\nJIT: Invalidated Stub at [" << Stub << "]\n");
- StubFnRefs.erase(Stub);
-
- // Invalidate the stub. If it is a GV stub, update the JIT's global
- // mapping for that GV to zero.
- GlobalValue *GV = Resolver.invalidateStub(Stub);
- if (GV) {
- TheJIT->updateGlobalMapping(GV, 0);
- }
- }
- }
- CurFnStubUses.erase(F);
}
-void* JITEmitter::allocateSpace(uintptr_t Size, unsigned Alignment) {
+void *JITEmitter::allocateSpace(uintptr_t Size, unsigned Alignment) {
if (BufferBegin)
return JITCodeEmitter::allocateSpace(Size, Alignment);
return CurBufferPtr;
}
-void* JITEmitter::allocateGlobal(uintptr_t Size, unsigned Alignment) {
+void *JITEmitter::allocateGlobal(uintptr_t Size, unsigned Alignment) {
// Delegate this call through the memory manager.
return MemMgr->allocateGlobal(Size, Alignment);
}
const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
if (Constants.empty()) return;
- unsigned Size = GetConstantPoolSizeInBytes(MCP, TheJIT->getTargetData());
+ unsigned Size = GetConstantPoolSizeInBytes(MCP, TheJIT->getDataLayout());
unsigned Align = MCP->getConstantPoolAlignment();
ConstantPoolBase = allocateSpace(Size, Align);
ConstantPool = MCP;
if (ConstantPoolBase == 0) return; // Buffer overflow.
- DEBUG(errs() << "JIT: Emitted constant pool at [" << ConstantPoolBase
+ DEBUG(dbgs() << "JIT: Emitted constant pool at [" << ConstantPoolBase
<< "] (size: " << Size << ", alignment: " << Align << ")\n");
// Initialize the memory for all of the constant pool entries.
ConstPoolAddresses.push_back(CAddr);
if (CPE.isMachineConstantPoolEntry()) {
// FIXME: add support to lower machine constant pool values into bytes!
- llvm_report_error("Initialize memory with machine specific constant pool"
+ report_fatal_error("Initialize memory with machine specific constant pool"
"entry has not been implemented!");
}
TheJIT->InitializeMemory(CPE.Val.ConstVal, (void*)CAddr);
- DEBUG(errs() << "JIT: CP" << i << " at [0x";
- errs().write_hex(CAddr) << "]\n");
+ DEBUG(dbgs() << "JIT: CP" << i << " at [0x";
+ dbgs().write_hex(CAddr) << "]\n");
- const Type *Ty = CPE.Val.ConstVal->getType();
- Offset += TheJIT->getTargetData()->getTypeAllocSize(Ty);
+ Type *Ty = CPE.Val.ConstVal->getType();
+ Offset += TheJIT->getDataLayout()->getTypeAllocSize(Ty);
}
}
void JITEmitter::initJumpTableInfo(MachineJumpTableInfo *MJTI) {
if (TheJIT->getJITInfo().hasCustomJumpTables())
return;
+ if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline)
+ return;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty()) return;
for (unsigned i = 0, e = JT.size(); i != e; ++i)
NumEntries += JT[i].MBBs.size();
- unsigned EntrySize = MJTI->getEntrySize();
+ unsigned EntrySize = MJTI->getEntrySize(*TheJIT->getDataLayout());
// Just allocate space for all the jump tables now. We will fix up the actual
// MBB entries in the tables after we emit the code for each block, since then
// we will know the final locations of the MBBs in memory.
JumpTable = MJTI;
- JumpTableBase = allocateSpace(NumEntries * EntrySize, MJTI->getAlignment());
+ JumpTableBase = allocateSpace(NumEntries * EntrySize,
+ MJTI->getEntryAlignment(*TheJIT->getDataLayout()));
}
void JITEmitter::emitJumpTableInfo(MachineJumpTableInfo *MJTI) {
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty() || JumpTableBase == 0) return;
- if (TargetMachine::getRelocationModel() == Reloc::PIC_) {
- assert(MJTI->getEntrySize() == 4 && "Cross JIT'ing?");
+
+ switch (MJTI->getEntryKind()) {
+ case MachineJumpTableInfo::EK_Inline:
+ return;
+ case MachineJumpTableInfo::EK_BlockAddress: {
+ // EK_BlockAddress - Each entry is a plain address of block, e.g.:
+ // .word LBB123
+ assert(MJTI->getEntrySize(*TheJIT->getDataLayout()) == sizeof(void*) &&
+ "Cross JIT'ing?");
+
+ // For each jump table, map each target in the jump table to the address of
+ // an emitted MachineBasicBlock.
+ intptr_t *SlotPtr = (intptr_t*)JumpTableBase;
+
+ for (unsigned i = 0, e = JT.size(); i != e; ++i) {
+ const std::vector<MachineBasicBlock*> &MBBs = JT[i].MBBs;
+ // Store the address of the basic block for this jump table slot in the
+ // memory we allocated for the jump table in 'initJumpTableInfo'
+ for (unsigned mi = 0, me = MBBs.size(); mi != me; ++mi)
+ *SlotPtr++ = getMachineBasicBlockAddress(MBBs[mi]);
+ }
+ break;
+ }
+
+ case MachineJumpTableInfo::EK_Custom32:
+ case MachineJumpTableInfo::EK_GPRel32BlockAddress:
+ case MachineJumpTableInfo::EK_LabelDifference32: {
+ assert(MJTI->getEntrySize(*TheJIT->getDataLayout()) == 4&&"Cross JIT'ing?");
// For each jump table, place the offset from the beginning of the table
// to the target address.
int *SlotPtr = (int*)JumpTableBase;
uintptr_t Base = (uintptr_t)SlotPtr;
for (unsigned mi = 0, me = MBBs.size(); mi != me; ++mi) {
uintptr_t MBBAddr = getMachineBasicBlockAddress(MBBs[mi]);
+ /// FIXME: USe EntryKind instead of magic "getPICJumpTableEntry" hook.
*SlotPtr++ = TheJIT->getJITInfo().getPICJumpTableEntry(MBBAddr, Base);
}
}
- } else {
- assert(MJTI->getEntrySize() == sizeof(void*) && "Cross JIT'ing?");
-
- // For each jump table, map each target in the jump table to the address of
- // an emitted MachineBasicBlock.
- intptr_t *SlotPtr = (intptr_t*)JumpTableBase;
-
- for (unsigned i = 0, e = JT.size(); i != e; ++i) {
- const std::vector<MachineBasicBlock*> &MBBs = JT[i].MBBs;
- // Store the address of the basic block for this jump table slot in the
- // memory we allocated for the jump table in 'initJumpTableInfo'
- for (unsigned mi = 0, me = MBBs.size(); mi != me; ++mi)
- *SlotPtr++ = getMachineBasicBlockAddress(MBBs[mi]);
- }
+ break;
+ }
+ case MachineJumpTableInfo::EK_GPRel64BlockAddress:
+ llvm_unreachable(
+ "JT Info emission not implemented for GPRel64BlockAddress yet.");
}
}
-void JITEmitter::startGVStub(BufferState &BS, const GlobalValue* GV,
+void JITEmitter::startGVStub(const GlobalValue* GV,
unsigned StubSize, unsigned Alignment) {
- SaveStateTo(BS);
+ SavedBufferBegin = BufferBegin;
+ SavedBufferEnd = BufferEnd;
+ SavedCurBufferPtr = CurBufferPtr;
BufferBegin = CurBufferPtr = MemMgr->allocateStub(GV, StubSize, Alignment);
BufferEnd = BufferBegin+StubSize+1;
}
-void JITEmitter::startGVStub(BufferState &BS, void *Buffer, unsigned StubSize) {
- SaveStateTo(BS);
+void JITEmitter::startGVStub(void *Buffer, unsigned StubSize) {
+ SavedBufferBegin = BufferBegin;
+ SavedBufferEnd = BufferEnd;
+ SavedCurBufferPtr = CurBufferPtr;
BufferBegin = CurBufferPtr = (uint8_t *)Buffer;
BufferEnd = BufferBegin+StubSize+1;
}
-void *JITEmitter::finishGVStub(BufferState &BS) {
+void JITEmitter::finishGVStub() {
assert(CurBufferPtr != BufferEnd && "Stub overflowed allocated space.");
NumBytes += getCurrentPCOffset();
- void *Result = BufferBegin;
- RestoreStateFrom(BS);
- return Result;
+ BufferBegin = SavedBufferBegin;
+ BufferEnd = SavedBufferEnd;
+ CurBufferPtr = SavedCurBufferPtr;
+}
+
+void *JITEmitter::allocIndirectGV(const GlobalValue *GV,
+ const uint8_t *Buffer, size_t Size,
+ unsigned Alignment) {
+ uint8_t *IndGV = MemMgr->allocateStub(GV, Size, Alignment);
+ memcpy(IndGV, Buffer, Size);
+ return IndGV;
}
// getConstantPoolEntryAddress - Return the address of the 'ConstantNum' entry
const std::vector<MachineJumpTableEntry> &JT = JumpTable->getJumpTables();
assert(Index < JT.size() && "Invalid jump table index!");
- unsigned Offset = 0;
- unsigned EntrySize = JumpTable->getEntrySize();
+ unsigned EntrySize = JumpTable->getEntrySize(*TheJIT->getDataLayout());
+ unsigned Offset = 0;
for (unsigned i = 0; i < Index; ++i)
Offset += JT[i].MBBs.size();
return new JITEmitter(jit, JMM, tm);
}
-// 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.
-extern "C" {
- void *getPointerToNamedFunction(const char *Name) {
- if (Function *F = TheJIT->FindFunctionNamed(Name))
- return TheJIT->getPointerToFunction(F);
- return TheJIT->getPointerToNamedFunction(Name);
- }
-}
-
// getPointerToFunctionOrStub - If the specified function has been
// code-gen'd, return a pointer to the function. If not, compile it, or use
// a stub to implement lazy compilation if available.
return Addr;
// Get a stub if the target supports it.
- assert(isa<JITEmitter>(JCE) && "Unexpected MCE?");
- JITEmitter *JE = cast<JITEmitter>(getCodeEmitter());
+ JITEmitter *JE = static_cast<JITEmitter*>(getCodeEmitter());
return JE->getJITResolver().getLazyFunctionStub(F);
}
void JIT::updateFunctionStub(Function *F) {
// Get the empty stub we generated earlier.
- assert(isa<JITEmitter>(JCE) && "Unexpected MCE?");
- JITEmitter *JE = cast<JITEmitter>(getCodeEmitter());
+ JITEmitter *JE = static_cast<JITEmitter*>(getCodeEmitter());
void *Stub = JE->getJITResolver().getLazyFunctionStub(F);
void *Addr = getPointerToGlobalIfAvailable(F);
+ assert(Addr != Stub && "Function must have non-stub address to be updated.");
// Tell the target jit info to rewrite the stub at the specified address,
// rather than creating a new one.
- MachineCodeEmitter::BufferState BS;
TargetJITInfo::StubLayout layout = getJITInfo().getStubLayout();
- JE->startGVStub(BS, Stub, layout.Size);
+ JE->startGVStub(Stub, layout.Size);
getJITInfo().emitFunctionStub(F, Addr, *getCodeEmitter());
- JE->finishGVStub(BS);
+ JE->finishGVStub();
}
/// freeMachineCodeForFunction - release machine code memory for given Function.
updateGlobalMapping(F, 0);
// Free the actual memory for the function body and related stuff.
- assert(isa<JITEmitter>(JCE) && "Unexpected MCE?");
- cast<JITEmitter>(JCE)->deallocateMemForFunction(F);
+ static_cast<JITEmitter*>(JCE)->deallocateMemForFunction(F);
}
projects / oota-llvm.git / blobdiff