diff options
Diffstat (limited to 'contrib/llvm/tools/llvm-rtdyld')
-rw-r--r-- | contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp | 722 |
1 files changed, 722 insertions, 0 deletions
diff --git a/contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp b/contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp new file mode 100644 index 0000000..6ee3a44 --- /dev/null +++ b/contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp @@ -0,0 +1,722 @@ +//===-- llvm-rtdyld.cpp - MCJIT Testing Tool ------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This is a testing tool for use with the MC-JIT LLVM components. +// +//===----------------------------------------------------------------------===// + +#include "llvm/ADT/StringMap.h" +#include "llvm/DebugInfo/DIContext.h" +#include "llvm/DebugInfo/DWARF/DWARFContext.h" +#include "llvm/ExecutionEngine/RTDyldMemoryManager.h" +#include "llvm/ExecutionEngine/RuntimeDyld.h" +#include "llvm/ExecutionEngine/RuntimeDyldChecker.h" +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCDisassembler.h" +#include "llvm/MC/MCInstPrinter.h" +#include "llvm/MC/MCInstrInfo.h" +#include "llvm/MC/MCRegisterInfo.h" +#include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/Object/MachO.h" +#include "llvm/Object/SymbolSize.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/DynamicLibrary.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/Memory.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/Signals.h" +#include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/TargetSelect.h" +#include "llvm/Support/raw_ostream.h" +#include <list> +#include <system_error> + +using namespace llvm; +using namespace llvm::object; + +static cl::list<std::string> +InputFileList(cl::Positional, cl::ZeroOrMore, + cl::desc("<input file>")); + +enum ActionType { + AC_Execute, + AC_PrintObjectLineInfo, + AC_PrintLineInfo, + AC_PrintDebugLineInfo, + AC_Verify +}; + +static cl::opt<ActionType> +Action(cl::desc("Action to perform:"), + cl::init(AC_Execute), + cl::values(clEnumValN(AC_Execute, "execute", + "Load, link, and execute the inputs."), + clEnumValN(AC_PrintLineInfo, "printline", + "Load, link, and print line information for each function."), + clEnumValN(AC_PrintDebugLineInfo, "printdebugline", + "Load, link, and print line information for each function using the debug object"), + clEnumValN(AC_PrintObjectLineInfo, "printobjline", + "Like -printlineinfo but does not load the object first"), + clEnumValN(AC_Verify, "verify", + "Load, link and verify the resulting memory image."), + clEnumValEnd)); + +static cl::opt<std::string> +EntryPoint("entry", + cl::desc("Function to call as entry point."), + cl::init("_main")); + +static cl::list<std::string> +Dylibs("dylib", + cl::desc("Add library."), + cl::ZeroOrMore); + +static cl::opt<std::string> +TripleName("triple", cl::desc("Target triple for disassembler")); + +static cl::opt<std::string> +MCPU("mcpu", + cl::desc("Target a specific cpu type (-mcpu=help for details)"), + cl::value_desc("cpu-name"), + cl::init("")); + +static cl::list<std::string> +CheckFiles("check", + cl::desc("File containing RuntimeDyld verifier checks."), + cl::ZeroOrMore); + +static cl::opt<uint64_t> +PreallocMemory("preallocate", + cl::desc("Allocate memory upfront rather than on-demand"), + cl::init(0)); + +static cl::opt<uint64_t> +TargetAddrStart("target-addr-start", + cl::desc("For -verify only: start of phony target address " + "range."), + cl::init(4096), // Start at "page 1" - no allocating at "null". + cl::Hidden); + +static cl::opt<uint64_t> +TargetAddrEnd("target-addr-end", + cl::desc("For -verify only: end of phony target address range."), + cl::init(~0ULL), + cl::Hidden); + +static cl::opt<uint64_t> +TargetSectionSep("target-section-sep", + cl::desc("For -verify only: Separation between sections in " + "phony target address space."), + cl::init(0), + cl::Hidden); + +static cl::list<std::string> +SpecificSectionMappings("map-section", + cl::desc("For -verify only: Map a section to a " + "specific address."), + cl::ZeroOrMore, + cl::Hidden); + +static cl::list<std::string> +DummySymbolMappings("dummy-extern", + cl::desc("For -verify only: Inject a symbol into the extern " + "symbol table."), + cl::ZeroOrMore, + cl::Hidden); + +static cl::opt<bool> +PrintAllocationRequests("print-alloc-requests", + cl::desc("Print allocation requests made to the memory " + "manager by RuntimeDyld"), + cl::Hidden); + +/* *** */ + +// A trivial memory manager that doesn't do anything fancy, just uses the +// support library allocation routines directly. +class TrivialMemoryManager : public RTDyldMemoryManager { +public: + SmallVector<sys::MemoryBlock, 16> FunctionMemory; + SmallVector<sys::MemoryBlock, 16> DataMemory; + + uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, + unsigned SectionID, + StringRef SectionName) override; + uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, + unsigned SectionID, StringRef SectionName, + bool IsReadOnly) override; + + void *getPointerToNamedFunction(const std::string &Name, + bool AbortOnFailure = true) override { + return nullptr; + } + + bool finalizeMemory(std::string *ErrMsg) override { return false; } + + void addDummySymbol(const std::string &Name, uint64_t Addr) { + DummyExterns[Name] = Addr; + } + + RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override { + auto I = DummyExterns.find(Name); + + if (I != DummyExterns.end()) + return RuntimeDyld::SymbolInfo(I->second, JITSymbolFlags::Exported); + + return RTDyldMemoryManager::findSymbol(Name); + } + + void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr, + size_t Size) override {} + void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr, + size_t Size) override {} + + void preallocateSlab(uint64_t Size) { + std::string Err; + sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err); + if (!MB.base()) + report_fatal_error("Can't allocate enough memory: " + Err); + + PreallocSlab = MB; + UsePreallocation = true; + SlabSize = Size; + } + + uint8_t *allocateFromSlab(uintptr_t Size, unsigned Alignment, bool isCode) { + Size = RoundUpToAlignment(Size, Alignment); + if (CurrentSlabOffset + Size > SlabSize) + report_fatal_error("Can't allocate enough memory. Tune --preallocate"); + + uintptr_t OldSlabOffset = CurrentSlabOffset; + sys::MemoryBlock MB((void *)OldSlabOffset, Size); + if (isCode) + FunctionMemory.push_back(MB); + else + DataMemory.push_back(MB); + CurrentSlabOffset += Size; + return (uint8_t*)OldSlabOffset; + } + +private: + std::map<std::string, uint64_t> DummyExterns; + sys::MemoryBlock PreallocSlab; + bool UsePreallocation = false; + uintptr_t SlabSize = 0; + uintptr_t CurrentSlabOffset = 0; +}; + +uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size, + unsigned Alignment, + unsigned SectionID, + StringRef SectionName) { + if (PrintAllocationRequests) + outs() << "allocateCodeSection(Size = " << Size << ", Alignment = " + << Alignment << ", SectionName = " << SectionName << ")\n"; + + if (UsePreallocation) + return allocateFromSlab(Size, Alignment, true /* isCode */); + + std::string Err; + sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err); + if (!MB.base()) + report_fatal_error("MemoryManager allocation failed: " + Err); + FunctionMemory.push_back(MB); + return (uint8_t*)MB.base(); +} + +uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size, + unsigned Alignment, + unsigned SectionID, + StringRef SectionName, + bool IsReadOnly) { + if (PrintAllocationRequests) + outs() << "allocateDataSection(Size = " << Size << ", Alignment = " + << Alignment << ", SectionName = " << SectionName << ")\n"; + + if (UsePreallocation) + return allocateFromSlab(Size, Alignment, false /* isCode */); + + std::string Err; + sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err); + if (!MB.base()) + report_fatal_error("MemoryManager allocation failed: " + Err); + DataMemory.push_back(MB); + return (uint8_t*)MB.base(); +} + +static const char *ProgramName; + +static int Error(const Twine &Msg) { + errs() << ProgramName << ": error: " << Msg << "\n"; + return 1; +} + +static void loadDylibs() { + for (const std::string &Dylib : Dylibs) { + if (!sys::fs::is_regular_file(Dylib)) + report_fatal_error("Dylib not found: '" + Dylib + "'."); + std::string ErrMsg; + if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg)) + report_fatal_error("Error loading '" + Dylib + "': " + ErrMsg); + } +} + +/* *** */ + +static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) { + assert(LoadObjects || !UseDebugObj); + + // Load any dylibs requested on the command line. + loadDylibs(); + + // If we don't have any input files, read from stdin. + if (!InputFileList.size()) + InputFileList.push_back("-"); + for (auto &File : InputFileList) { + // Instantiate a dynamic linker. + TrivialMemoryManager MemMgr; + RuntimeDyld Dyld(MemMgr, MemMgr); + + // Load the input memory buffer. + + ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer = + MemoryBuffer::getFileOrSTDIN(File); + if (std::error_code EC = InputBuffer.getError()) + return Error("unable to read input: '" + EC.message() + "'"); + + ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj( + ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef())); + + if (std::error_code EC = MaybeObj.getError()) + return Error("unable to create object file: '" + EC.message() + "'"); + + ObjectFile &Obj = **MaybeObj; + + OwningBinary<ObjectFile> DebugObj; + std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr; + ObjectFile *SymbolObj = &Obj; + if (LoadObjects) { + // Load the object file + LoadedObjInfo = + Dyld.loadObject(Obj); + + if (Dyld.hasError()) + return Error(Dyld.getErrorString()); + + // Resolve all the relocations we can. + Dyld.resolveRelocations(); + + if (UseDebugObj) { + DebugObj = LoadedObjInfo->getObjectForDebug(Obj); + SymbolObj = DebugObj.getBinary(); + LoadedObjInfo.reset(); + } + } + + std::unique_ptr<DIContext> Context( + new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get())); + + std::vector<std::pair<SymbolRef, uint64_t>> SymAddr = + object::computeSymbolSizes(*SymbolObj); + + // Use symbol info to iterate functions in the object. + for (const auto &P : SymAddr) { + object::SymbolRef Sym = P.first; + if (Sym.getType() == object::SymbolRef::ST_Function) { + ErrorOr<StringRef> Name = Sym.getName(); + if (!Name) + continue; + ErrorOr<uint64_t> AddrOrErr = Sym.getAddress(); + if (!AddrOrErr) + continue; + uint64_t Addr = *AddrOrErr; + + uint64_t Size = P.second; + // If we're not using the debug object, compute the address of the + // symbol in memory (rather than that in the unrelocated object file) + // and use that to query the DWARFContext. + if (!UseDebugObj && LoadObjects) { + object::section_iterator Sec = *Sym.getSection(); + StringRef SecName; + Sec->getName(SecName); + uint64_t SectionLoadAddress = + LoadedObjInfo->getSectionLoadAddress(*Sec); + if (SectionLoadAddress != 0) + Addr += SectionLoadAddress - Sec->getAddress(); + } + + outs() << "Function: " << *Name << ", Size = " << Size + << ", Addr = " << Addr << "\n"; + + DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size); + for (auto &D : Lines) { + outs() << " Line info @ " << D.first - Addr << ": " + << D.second.FileName << ", line:" << D.second.Line << "\n"; + } + } + } + } + + return 0; +} + +static void doPreallocation(TrivialMemoryManager &MemMgr) { + // Allocate a slab of memory upfront, if required. This is used if + // we want to test small code models. + if (static_cast<intptr_t>(PreallocMemory) < 0) + report_fatal_error("Pre-allocated bytes of memory must be a positive integer."); + + // FIXME: Limit the amount of memory that can be preallocated? + if (PreallocMemory != 0) + MemMgr.preallocateSlab(PreallocMemory); +} + +static int executeInput() { + // Load any dylibs requested on the command line. + loadDylibs(); + + // Instantiate a dynamic linker. + TrivialMemoryManager MemMgr; + doPreallocation(MemMgr); + RuntimeDyld Dyld(MemMgr, MemMgr); + + // If we don't have any input files, read from stdin. + if (!InputFileList.size()) + InputFileList.push_back("-"); + for (auto &File : InputFileList) { + // Load the input memory buffer. + ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer = + MemoryBuffer::getFileOrSTDIN(File); + if (std::error_code EC = InputBuffer.getError()) + return Error("unable to read input: '" + EC.message() + "'"); + ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj( + ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef())); + + if (std::error_code EC = MaybeObj.getError()) + return Error("unable to create object file: '" + EC.message() + "'"); + + ObjectFile &Obj = **MaybeObj; + + // Load the object file + Dyld.loadObject(Obj); + if (Dyld.hasError()) { + return Error(Dyld.getErrorString()); + } + } + + // Resove all the relocations we can. + // FIXME: Error out if there are unresolved relocations. + Dyld.resolveRelocations(); + + // Get the address of the entry point (_main by default). + void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint); + if (!MainAddress) + return Error("no definition for '" + EntryPoint + "'"); + + // Invalidate the instruction cache for each loaded function. + for (auto &FM : MemMgr.FunctionMemory) { + + // Make sure the memory is executable. + // setExecutable will call InvalidateInstructionCache. + std::string ErrorStr; + if (!sys::Memory::setExecutable(FM, &ErrorStr)) + return Error("unable to mark function executable: '" + ErrorStr + "'"); + } + + // Dispatch to _main(). + errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n"; + + int (*Main)(int, const char**) = + (int(*)(int,const char**)) uintptr_t(MainAddress); + const char **Argv = new const char*[2]; + // Use the name of the first input object module as argv[0] for the target. + Argv[0] = InputFileList[0].c_str(); + Argv[1] = nullptr; + return Main(1, Argv); +} + +static int checkAllExpressions(RuntimeDyldChecker &Checker) { + for (const auto& CheckerFileName : CheckFiles) { + ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf = + MemoryBuffer::getFileOrSTDIN(CheckerFileName); + if (std::error_code EC = CheckerFileBuf.getError()) + return Error("unable to read input '" + CheckerFileName + "': " + + EC.message()); + + if (!Checker.checkAllRulesInBuffer("# rtdyld-check:", + CheckerFileBuf.get().get())) + return Error("some checks in '" + CheckerFileName + "' failed"); + } + return 0; +} + +static std::map<void *, uint64_t> +applySpecificSectionMappings(RuntimeDyldChecker &Checker) { + + std::map<void*, uint64_t> SpecificMappings; + + for (StringRef Mapping : SpecificSectionMappings) { + + size_t EqualsIdx = Mapping.find_first_of("="); + std::string SectionIDStr = Mapping.substr(0, EqualsIdx); + size_t ComaIdx = Mapping.find_first_of(","); + + if (ComaIdx == StringRef::npos) + report_fatal_error("Invalid section specification '" + Mapping + + "'. Should be '<file name>,<section name>=<addr>'"); + + std::string FileName = SectionIDStr.substr(0, ComaIdx); + std::string SectionName = SectionIDStr.substr(ComaIdx + 1); + + uint64_t OldAddrInt; + std::string ErrorMsg; + std::tie(OldAddrInt, ErrorMsg) = + Checker.getSectionAddr(FileName, SectionName, true); + + if (ErrorMsg != "") + report_fatal_error(ErrorMsg); + + void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt)); + + std::string NewAddrStr = Mapping.substr(EqualsIdx + 1); + uint64_t NewAddr; + + if (StringRef(NewAddrStr).getAsInteger(0, NewAddr)) + report_fatal_error("Invalid section address in mapping '" + Mapping + + "'."); + + Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr); + SpecificMappings[OldAddr] = NewAddr; + } + + return SpecificMappings; +} + +// Scatter sections in all directions! +// Remaps section addresses for -verify mode. The following command line options +// can be used to customize the layout of the memory within the phony target's +// address space: +// -target-addr-start <s> -- Specify where the phony target addres range starts. +// -target-addr-end <e> -- Specify where the phony target address range ends. +// -target-section-sep <d> -- Specify how big a gap should be left between the +// end of one section and the start of the next. +// Defaults to zero. Set to something big +// (e.g. 1 << 32) to stress-test stubs, GOTs, etc. +// +static void remapSectionsAndSymbols(const llvm::Triple &TargetTriple, + TrivialMemoryManager &MemMgr, + RuntimeDyldChecker &Checker) { + + // Set up a work list (section addr/size pairs). + typedef std::list<std::pair<void*, uint64_t>> WorklistT; + WorklistT Worklist; + + for (const auto& CodeSection : MemMgr.FunctionMemory) + Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size())); + for (const auto& DataSection : MemMgr.DataMemory) + Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size())); + + // Apply any section-specific mappings that were requested on the command + // line. + typedef std::map<void*, uint64_t> AppliedMappingsT; + AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker); + + // Keep an "already allocated" mapping of section target addresses to sizes. + // Sections whose address mappings aren't specified on the command line will + // allocated around the explicitly mapped sections while maintaining the + // minimum separation. + std::map<uint64_t, uint64_t> AlreadyAllocated; + + // Move the previously applied mappings into the already-allocated map. + for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end(); + I != E;) { + WorklistT::iterator Tmp = I; + ++I; + AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first); + + if (AI != AppliedMappings.end()) { + AlreadyAllocated[AI->second] = Tmp->second; + Worklist.erase(Tmp); + } + } + + // If the -target-addr-end option wasn't explicitly passed, then set it to a + // sensible default based on the target triple. + if (TargetAddrEnd.getNumOccurrences() == 0) { + if (TargetTriple.isArch16Bit()) + TargetAddrEnd = (1ULL << 16) - 1; + else if (TargetTriple.isArch32Bit()) + TargetAddrEnd = (1ULL << 32) - 1; + // TargetAddrEnd already has a sensible default for 64-bit systems, so + // there's nothing to do in the 64-bit case. + } + + // Process any elements remaining in the worklist. + while (!Worklist.empty()) { + std::pair<void*, uint64_t> CurEntry = Worklist.front(); + Worklist.pop_front(); + + uint64_t NextSectionAddr = TargetAddrStart; + + for (const auto &Alloc : AlreadyAllocated) + if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first) + break; + else + NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep; + + AlreadyAllocated[NextSectionAddr] = CurEntry.second; + Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr); + } + + // Add dummy symbols to the memory manager. + for (const auto &Mapping : DummySymbolMappings) { + size_t EqualsIdx = Mapping.find_first_of("="); + + if (EqualsIdx == StringRef::npos) + report_fatal_error("Invalid dummy symbol specification '" + Mapping + + "'. Should be '<symbol name>=<addr>'"); + + std::string Symbol = Mapping.substr(0, EqualsIdx); + std::string AddrStr = Mapping.substr(EqualsIdx + 1); + + uint64_t Addr; + if (StringRef(AddrStr).getAsInteger(0, Addr)) + report_fatal_error("Invalid symbol mapping '" + Mapping + "'."); + + MemMgr.addDummySymbol(Symbol, Addr); + } +} + +// Load and link the objects specified on the command line, but do not execute +// anything. Instead, attach a RuntimeDyldChecker instance and call it to +// verify the correctness of the linked memory. +static int linkAndVerify() { + + // Check for missing triple. + if (TripleName == "") + return Error("-triple required when running in -verify mode."); + + // Look up the target and build the disassembler. + Triple TheTriple(Triple::normalize(TripleName)); + std::string ErrorStr; + const Target *TheTarget = + TargetRegistry::lookupTarget("", TheTriple, ErrorStr); + if (!TheTarget) + return Error("Error accessing target '" + TripleName + "': " + ErrorStr); + + TripleName = TheTriple.getTriple(); + + std::unique_ptr<MCSubtargetInfo> STI( + TheTarget->createMCSubtargetInfo(TripleName, MCPU, "")); + if (!STI) + return Error("Unable to create subtarget info!"); + + std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName)); + if (!MRI) + return Error("Unable to create target register info!"); + + std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName)); + if (!MAI) + return Error("Unable to create target asm info!"); + + MCContext Ctx(MAI.get(), MRI.get(), nullptr); + + std::unique_ptr<MCDisassembler> Disassembler( + TheTarget->createMCDisassembler(*STI, Ctx)); + if (!Disassembler) + return Error("Unable to create disassembler!"); + + std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo()); + + std::unique_ptr<MCInstPrinter> InstPrinter( + TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI)); + + // Load any dylibs requested on the command line. + loadDylibs(); + + // Instantiate a dynamic linker. + TrivialMemoryManager MemMgr; + doPreallocation(MemMgr); + RuntimeDyld Dyld(MemMgr, MemMgr); + Dyld.setProcessAllSections(true); + RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(), + llvm::dbgs()); + + // If we don't have any input files, read from stdin. + if (!InputFileList.size()) + InputFileList.push_back("-"); + for (auto &Filename : InputFileList) { + // Load the input memory buffer. + ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer = + MemoryBuffer::getFileOrSTDIN(Filename); + + if (std::error_code EC = InputBuffer.getError()) + return Error("unable to read input: '" + EC.message() + "'"); + + ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj( + ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef())); + + if (std::error_code EC = MaybeObj.getError()) + return Error("unable to create object file: '" + EC.message() + "'"); + + ObjectFile &Obj = **MaybeObj; + + // Load the object file + Dyld.loadObject(Obj); + if (Dyld.hasError()) { + return Error(Dyld.getErrorString()); + } + } + + // Re-map the section addresses into the phony target address space and add + // dummy symbols. + remapSectionsAndSymbols(TheTriple, MemMgr, Checker); + + // Resolve all the relocations we can. + Dyld.resolveRelocations(); + + // Register EH frames. + Dyld.registerEHFrames(); + + int ErrorCode = checkAllExpressions(Checker); + if (Dyld.hasError()) + return Error("RTDyld reported an error applying relocations:\n " + + Dyld.getErrorString()); + + return ErrorCode; +} + +int main(int argc, char **argv) { + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + + ProgramName = argv[0]; + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + + llvm::InitializeAllTargetInfos(); + llvm::InitializeAllTargetMCs(); + llvm::InitializeAllDisassemblers(); + + cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n"); + + switch (Action) { + case AC_Execute: + return executeInput(); + case AC_PrintDebugLineInfo: + return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */ true); + case AC_PrintLineInfo: + return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false); + case AC_PrintObjectLineInfo: + return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false); + case AC_Verify: + return linkAndVerify(); + } +} |