| //===-- RemoteJITUtils.h - Utilities for remote-JITing with LLI -*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Utilities for remote-JITing with LLI. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TOOLS_LLI_REMOTEJITUTILS_H |
| #define LLVM_TOOLS_LLI_REMOTEJITUTILS_H |
| |
| #include "llvm/ExecutionEngine/Orc/RawByteChannel.h" |
| #include "llvm/ExecutionEngine/RTDyldMemoryManager.h" |
| #include <mutex> |
| |
| #if !defined(_MSC_VER) && !defined(__MINGW32__) |
| #include <unistd.h> |
| #else |
| #include <io.h> |
| #endif |
| |
| /// RPC channel that reads from and writes from file descriptors. |
| class FDRawChannel final : public llvm::orc::rpc::RawByteChannel { |
| public: |
| FDRawChannel(int InFD, int OutFD) : InFD(InFD), OutFD(OutFD) {} |
| |
| llvm::Error readBytes(char *Dst, unsigned Size) override { |
| assert(Dst && "Attempt to read into null."); |
| ssize_t Completed = 0; |
| while (Completed < static_cast<ssize_t>(Size)) { |
| ssize_t Read = ::read(InFD, Dst + Completed, Size - Completed); |
| if (Read <= 0) { |
| auto ErrNo = errno; |
| if (ErrNo == EAGAIN || ErrNo == EINTR) |
| continue; |
| else |
| return llvm::errorCodeToError( |
| std::error_code(errno, std::generic_category())); |
| } |
| Completed += Read; |
| } |
| return llvm::Error::success(); |
| } |
| |
| llvm::Error appendBytes(const char *Src, unsigned Size) override { |
| assert(Src && "Attempt to append from null."); |
| ssize_t Completed = 0; |
| while (Completed < static_cast<ssize_t>(Size)) { |
| ssize_t Written = ::write(OutFD, Src + Completed, Size - Completed); |
| if (Written < 0) { |
| auto ErrNo = errno; |
| if (ErrNo == EAGAIN || ErrNo == EINTR) |
| continue; |
| else |
| return llvm::errorCodeToError( |
| std::error_code(errno, std::generic_category())); |
| } |
| Completed += Written; |
| } |
| return llvm::Error::success(); |
| } |
| |
| llvm::Error send() override { return llvm::Error::success(); } |
| |
| private: |
| int InFD, OutFD; |
| }; |
| |
| // launch the remote process (see lli.cpp) and return a channel to it. |
| std::unique_ptr<FDRawChannel> launchRemote(); |
| |
| namespace llvm { |
| |
| // ForwardingMM - Adapter to connect MCJIT to Orc's Remote8 |
| // memory manager. |
| class ForwardingMemoryManager : public llvm::RTDyldMemoryManager { |
| public: |
| void setMemMgr(std::unique_ptr<RuntimeDyld::MemoryManager> MemMgr) { |
| this->MemMgr = std::move(MemMgr); |
| } |
| |
| void setResolver(std::shared_ptr<LegacyJITSymbolResolver> Resolver) { |
| this->Resolver = std::move(Resolver); |
| } |
| |
| uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, |
| unsigned SectionID, |
| StringRef SectionName) override { |
| return MemMgr->allocateCodeSection(Size, Alignment, SectionID, SectionName); |
| } |
| |
| uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, |
| unsigned SectionID, StringRef SectionName, |
| bool IsReadOnly) override { |
| return MemMgr->allocateDataSection(Size, Alignment, SectionID, SectionName, |
| IsReadOnly); |
| } |
| |
| void reserveAllocationSpace(uintptr_t CodeSize, uint32_t CodeAlign, |
| uintptr_t RODataSize, uint32_t RODataAlign, |
| uintptr_t RWDataSize, |
| uint32_t RWDataAlign) override { |
| MemMgr->reserveAllocationSpace(CodeSize, CodeAlign, RODataSize, RODataAlign, |
| RWDataSize, RWDataAlign); |
| } |
| |
| bool needsToReserveAllocationSpace() override { |
| return MemMgr->needsToReserveAllocationSpace(); |
| } |
| |
| void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr, |
| size_t Size) override { |
| MemMgr->registerEHFrames(Addr, LoadAddr, Size); |
| } |
| |
| void deregisterEHFrames() override { |
| MemMgr->deregisterEHFrames(); |
| } |
| |
| bool finalizeMemory(std::string *ErrMsg = nullptr) override { |
| return MemMgr->finalizeMemory(ErrMsg); |
| } |
| |
| void notifyObjectLoaded(RuntimeDyld &RTDyld, |
| const object::ObjectFile &Obj) override { |
| MemMgr->notifyObjectLoaded(RTDyld, Obj); |
| } |
| |
| // Don't hide the sibling notifyObjectLoaded from RTDyldMemoryManager. |
| using RTDyldMemoryManager::notifyObjectLoaded; |
| |
| JITSymbol findSymbol(const std::string &Name) override { |
| return Resolver->findSymbol(Name); |
| } |
| |
| JITSymbol |
| findSymbolInLogicalDylib(const std::string &Name) override { |
| return Resolver->findSymbolInLogicalDylib(Name); |
| } |
| |
| private: |
| std::unique_ptr<RuntimeDyld::MemoryManager> MemMgr; |
| std::shared_ptr<LegacyJITSymbolResolver> Resolver; |
| }; |
| } |
| |
| #endif |