1 //===---- OrcMCJITReplacement.h - Orc based MCJIT replacement ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Orc based MCJIT replacement.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_EXECUTIONENGINE_ORC_ORCMCJITREPLACEMENT_H
15 #define LLVM_LIB_EXECUTIONENGINE_ORC_ORCMCJITREPLACEMENT_H
17 #include "llvm/ADT/ArrayRef.h"
18 #include "llvm/ADT/STLExtras.h"
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/ExecutionEngine/ExecutionEngine.h"
21 #include "llvm/ExecutionEngine/GenericValue.h"
22 #include "llvm/ExecutionEngine/JITSymbol.h"
23 #include "llvm/ExecutionEngine/RuntimeDyld.h"
24 #include "llvm/ExecutionEngine/Orc/CompileUtils.h"
25 #include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
26 #include "llvm/ExecutionEngine/Orc/LazyEmittingLayer.h"
27 #include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
28 #include "llvm/IR/Function.h"
29 #include "llvm/IR/Mangler.h"
30 #include "llvm/Object/Archive.h"
31 #include "llvm/Object/Binary.h"
32 #include "llvm/Object/ObjectFile.h"
33 #include "llvm/Support/Error.h"
34 #include "llvm/Support/ErrorHandling.h"
35 #include "llvm/Support/raw_ostream.h"
36 #include "llvm/Target/TargetMachine.h"
50 class OrcMCJITReplacement : public ExecutionEngine {
51 // OrcMCJITReplacement needs to do a little extra book-keeping to ensure that
52 // Orc's automatic finalization doesn't kick in earlier than MCJIT clients are
53 // expecting - see finalizeMemory.
54 class MCJITReplacementMemMgr : public MCJITMemoryManager {
56 MCJITReplacementMemMgr(OrcMCJITReplacement &M,
57 std::shared_ptr<MCJITMemoryManager> ClientMM)
58 : M(M), ClientMM(std::move(ClientMM)) {}
60 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
62 StringRef SectionName) override {
64 ClientMM->allocateCodeSection(Size, Alignment, SectionID,
66 M.SectionsAllocatedSinceLastLoad.insert(Addr);
70 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
71 unsigned SectionID, StringRef SectionName,
72 bool IsReadOnly) override {
73 uint8_t *Addr = ClientMM->allocateDataSection(Size, Alignment, SectionID,
74 SectionName, IsReadOnly);
75 M.SectionsAllocatedSinceLastLoad.insert(Addr);
79 void reserveAllocationSpace(uintptr_t CodeSize, uint32_t CodeAlign,
80 uintptr_t RODataSize, uint32_t RODataAlign,
82 uint32_t RWDataAlign) override {
83 return ClientMM->reserveAllocationSpace(CodeSize, CodeAlign,
84 RODataSize, RODataAlign,
85 RWDataSize, RWDataAlign);
88 bool needsToReserveAllocationSpace() override {
89 return ClientMM->needsToReserveAllocationSpace();
92 void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
93 size_t Size) override {
94 return ClientMM->registerEHFrames(Addr, LoadAddr, Size);
97 void deregisterEHFrames() override {
98 return ClientMM->deregisterEHFrames();
101 void notifyObjectLoaded(RuntimeDyld &RTDyld,
102 const object::ObjectFile &O) override {
103 return ClientMM->notifyObjectLoaded(RTDyld, O);
106 void notifyObjectLoaded(ExecutionEngine *EE,
107 const object::ObjectFile &O) override {
108 return ClientMM->notifyObjectLoaded(EE, O);
111 bool finalizeMemory(std::string *ErrMsg = nullptr) override {
112 // Each set of objects loaded will be finalized exactly once, but since
113 // symbol lookup during relocation may recursively trigger the
114 // loading/relocation of other modules, and since we're forwarding all
115 // finalizeMemory calls to a single underlying memory manager, we need to
116 // defer forwarding the call on until all necessary objects have been
117 // loaded. Otherwise, during the relocation of a leaf object, we will end
118 // up finalizing memory, causing a crash further up the stack when we
119 // attempt to apply relocations to finalized memory.
120 // To avoid finalizing too early, look at how many objects have been
121 // loaded but not yet finalized. This is a bit of a hack that relies on
122 // the fact that we're lazily emitting object files: The only way you can
123 // get more than one set of objects loaded but not yet finalized is if
124 // they were loaded during relocation of another set.
125 if (M.UnfinalizedSections.size() == 1)
126 return ClientMM->finalizeMemory(ErrMsg);
131 OrcMCJITReplacement &M;
132 std::shared_ptr<MCJITMemoryManager> ClientMM;
135 class LinkingResolver : public JITSymbolResolver {
137 LinkingResolver(OrcMCJITReplacement &M) : M(M) {}
139 JITSymbol findSymbol(const std::string &Name) override {
140 return M.ClientResolver->findSymbol(Name);
143 JITSymbol findSymbolInLogicalDylib(const std::string &Name) override {
144 if (auto Sym = M.findMangledSymbol(Name))
146 return M.ClientResolver->findSymbolInLogicalDylib(Name);
150 OrcMCJITReplacement &M;
155 static ExecutionEngine *
156 createOrcMCJITReplacement(std::string *ErrorMsg,
157 std::shared_ptr<MCJITMemoryManager> MemMgr,
158 std::shared_ptr<JITSymbolResolver> Resolver,
159 std::unique_ptr<TargetMachine> TM) {
160 return new OrcMCJITReplacement(std::move(MemMgr), std::move(Resolver),
165 static void Register() {
166 OrcMCJITReplacementCtor = createOrcMCJITReplacement;
170 std::shared_ptr<MCJITMemoryManager> MemMgr,
171 std::shared_ptr<JITSymbolResolver> ClientResolver,
172 std::unique_ptr<TargetMachine> TM)
173 : ExecutionEngine(TM->createDataLayout()), TM(std::move(TM)),
174 MemMgr(*this, std::move(MemMgr)), Resolver(*this),
175 ClientResolver(std::move(ClientResolver)), NotifyObjectLoaded(*this),
176 NotifyFinalized(*this),
177 ObjectLayer(NotifyObjectLoaded, NotifyFinalized),
178 CompileLayer(ObjectLayer, SimpleCompiler(*this->TM)),
179 LazyEmitLayer(CompileLayer) {}
181 void addModule(std::unique_ptr<Module> M) override {
183 // If this module doesn't have a DataLayout attached then attach the
185 if (M->getDataLayout().isDefault()) {
186 M->setDataLayout(getDataLayout());
188 assert(M->getDataLayout() == getDataLayout() && "DataLayout Mismatch");
190 Modules.push_back(std::move(M));
191 std::vector<Module *> Ms;
192 Ms.push_back(&*Modules.back());
193 LazyEmitLayer.addModuleSet(std::move(Ms), &MemMgr, &Resolver);
196 void addObjectFile(std::unique_ptr<object::ObjectFile> O) override {
197 std::vector<std::unique_ptr<object::ObjectFile>> Objs;
198 Objs.push_back(std::move(O));
199 ObjectLayer.addObjectSet(std::move(Objs), &MemMgr, &Resolver);
202 void addObjectFile(object::OwningBinary<object::ObjectFile> O) override {
203 std::vector<std::unique_ptr<object::OwningBinary<object::ObjectFile>>> Objs;
205 llvm::make_unique<object::OwningBinary<object::ObjectFile>>(
207 ObjectLayer.addObjectSet(std::move(Objs), &MemMgr, &Resolver);
210 void addArchive(object::OwningBinary<object::Archive> A) override {
211 Archives.push_back(std::move(A));
214 uint64_t getSymbolAddress(StringRef Name) {
215 return findSymbol(Name).getAddress();
218 JITSymbol findSymbol(StringRef Name) {
219 return findMangledSymbol(Mangle(Name));
222 void finalizeObject() override {
223 // This is deprecated - Aim to remove in ExecutionEngine.
224 // REMOVE IF POSSIBLE - Doesn't make sense for New JIT.
227 void mapSectionAddress(const void *LocalAddress,
228 uint64_t TargetAddress) override {
229 for (auto &P : UnfinalizedSections)
230 if (P.second.count(LocalAddress))
231 ObjectLayer.mapSectionAddress(P.first, LocalAddress, TargetAddress);
234 uint64_t getGlobalValueAddress(const std::string &Name) override {
235 return getSymbolAddress(Name);
238 uint64_t getFunctionAddress(const std::string &Name) override {
239 return getSymbolAddress(Name);
242 void *getPointerToFunction(Function *F) override {
243 uint64_t FAddr = getSymbolAddress(F->getName());
244 return reinterpret_cast<void *>(static_cast<uintptr_t>(FAddr));
247 void *getPointerToNamedFunction(StringRef Name,
248 bool AbortOnFailure = true) override {
249 uint64_t Addr = getSymbolAddress(Name);
250 if (!Addr && AbortOnFailure)
251 llvm_unreachable("Missing symbol!");
252 return reinterpret_cast<void *>(static_cast<uintptr_t>(Addr));
255 GenericValue runFunction(Function *F,
256 ArrayRef<GenericValue> ArgValues) override;
258 void setObjectCache(ObjectCache *NewCache) override {
259 CompileLayer.setObjectCache(NewCache);
262 void setProcessAllSections(bool ProcessAllSections) override {
263 ObjectLayer.setProcessAllSections(ProcessAllSections);
267 JITSymbol findMangledSymbol(StringRef Name) {
268 if (auto Sym = LazyEmitLayer.findSymbol(Name, false))
270 if (auto Sym = ClientResolver->findSymbol(Name))
272 if (auto Sym = scanArchives(Name))
278 JITSymbol scanArchives(StringRef Name) {
279 for (object::OwningBinary<object::Archive> &OB : Archives) {
280 object::Archive *A = OB.getBinary();
281 // Look for our symbols in each Archive
282 auto OptionalChildOrErr = A->findSym(Name);
283 if (!OptionalChildOrErr)
284 report_fatal_error(OptionalChildOrErr.takeError());
285 auto &OptionalChild = *OptionalChildOrErr;
287 // FIXME: Support nested archives?
288 Expected<std::unique_ptr<object::Binary>> ChildBinOrErr =
289 OptionalChild->getAsBinary();
290 if (!ChildBinOrErr) {
291 // TODO: Actually report errors helpfully.
292 consumeError(ChildBinOrErr.takeError());
295 std::unique_ptr<object::Binary> &ChildBin = ChildBinOrErr.get();
296 if (ChildBin->isObject()) {
297 std::vector<std::unique_ptr<object::ObjectFile>> ObjSet;
298 ObjSet.push_back(std::unique_ptr<object::ObjectFile>(
299 static_cast<object::ObjectFile *>(ChildBin.release())));
300 ObjectLayer.addObjectSet(std::move(ObjSet), &MemMgr, &Resolver);
301 if (auto Sym = ObjectLayer.findSymbol(Name, true))
309 class NotifyObjectLoadedT {
311 typedef std::vector<std::unique_ptr<RuntimeDyld::LoadedObjectInfo>>
314 NotifyObjectLoadedT(OrcMCJITReplacement &M) : M(M) {}
316 template <typename ObjListT>
317 void operator()(RTDyldObjectLinkingLayerBase::ObjSetHandleT H,
318 const ObjListT &Objects,
319 const LoadedObjInfoListT &Infos) const {
320 M.UnfinalizedSections[H] = std::move(M.SectionsAllocatedSinceLastLoad);
321 M.SectionsAllocatedSinceLastLoad = SectionAddrSet();
322 assert(Objects.size() == Infos.size() &&
323 "Incorrect number of Infos for Objects.");
324 for (unsigned I = 0; I < Objects.size(); ++I)
325 M.MemMgr.notifyObjectLoaded(&M, getObject(*Objects[I]));
329 static const object::ObjectFile& getObject(const object::ObjectFile &Obj) {
333 template <typename ObjT>
334 static const object::ObjectFile&
335 getObject(const object::OwningBinary<ObjT> &Obj) {
336 return *Obj.getBinary();
339 OrcMCJITReplacement &M;
342 class NotifyFinalizedT {
344 NotifyFinalizedT(OrcMCJITReplacement &M) : M(M) {}
346 void operator()(RTDyldObjectLinkingLayerBase::ObjSetHandleT H) {
347 M.UnfinalizedSections.erase(H);
351 OrcMCJITReplacement &M;
354 std::string Mangle(StringRef Name) {
355 std::string MangledName;
357 raw_string_ostream MangledNameStream(MangledName);
358 Mang.getNameWithPrefix(MangledNameStream, Name, getDataLayout());
363 typedef RTDyldObjectLinkingLayer<NotifyObjectLoadedT> ObjectLayerT;
364 typedef IRCompileLayer<ObjectLayerT> CompileLayerT;
365 typedef LazyEmittingLayer<CompileLayerT> LazyEmitLayerT;
367 std::unique_ptr<TargetMachine> TM;
368 MCJITReplacementMemMgr MemMgr;
369 LinkingResolver Resolver;
370 std::shared_ptr<JITSymbolResolver> ClientResolver;
373 NotifyObjectLoadedT NotifyObjectLoaded;
374 NotifyFinalizedT NotifyFinalized;
376 ObjectLayerT ObjectLayer;
377 CompileLayerT CompileLayer;
378 LazyEmitLayerT LazyEmitLayer;
380 // We need to store ObjLayerT::ObjSetHandles for each of the object sets
381 // that have been emitted but not yet finalized so that we can forward the
382 // mapSectionAddress calls appropriately.
383 typedef std::set<const void *> SectionAddrSet;
384 struct ObjSetHandleCompare {
385 bool operator()(ObjectLayerT::ObjSetHandleT H1,
386 ObjectLayerT::ObjSetHandleT H2) const {
390 SectionAddrSet SectionsAllocatedSinceLastLoad;
391 std::map<ObjectLayerT::ObjSetHandleT, SectionAddrSet, ObjSetHandleCompare>
394 std::vector<object::OwningBinary<object::Archive>> Archives;
397 } // end namespace orc
398 } // end namespace llvm
400 #endif // LLVM_LIB_EXECUTIONENGINE_ORC_MCJITREPLACEMENT_H