#include "llvm/ADT/StringMap.h"
#include "llvm/DebugInfo/DIContext.h"
-#include "llvm/ExecutionEngine/ObjectBuffer.h"
-#include "llvm/ExecutionEngine/ObjectImage.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/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;
-using std::error_code;
static cl::list<std::string>
InputFileList(cl::Positional, cl::ZeroOrMore,
enum ActionType {
AC_Execute,
- AC_PrintLineInfo
+ AC_PrintObjectLineInfo,
+ AC_PrintLineInfo,
+ AC_PrintDebugLineInfo,
+ AC_Verify
};
static cl::opt<ActionType>
"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>
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);
+
/* *** */
// A trivial memory manager that doesn't do anything fancy, just uses the
bool finalizeMemory(std::string *ErrMsg) override { return false; }
- // Invalidate instruction cache for sections with execute permissions.
- // Some platforms with separate data cache and instruction cache require
- // explicit cache flush, otherwise JIT code manipulations (like resolved
- // relocations) will get to the data cache but not to the instruction cache.
- virtual void invalidateInstructionCache();
+ 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) {
- sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
+ 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();
}
unsigned SectionID,
StringRef SectionName,
bool IsReadOnly) {
- sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
+ 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();
}
-void TrivialMemoryManager::invalidateInstructionCache() {
- for (int i = 0, e = FunctionMemory.size(); i != e; ++i)
- sys::Memory::InvalidateInstructionCache(FunctionMemory[i].base(),
- FunctionMemory[i].size());
-
- for (int i = 0, e = DataMemory.size(); i != e; ++i)
- sys::Memory::InvalidateInstructionCache(DataMemory[i].base(),
- DataMemory[i].size());
-}
-
static const char *ProgramName;
-static void Message(const char *Type, const Twine &Msg) {
- errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
-}
-
static int Error(const Twine &Msg) {
- Message("error", Msg);
+ errs() << ProgramName << ": error: " << Msg << "\n";
return 1;
}
}
}
-
/* *** */
-static int printLineInfoForInput() {
+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(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
+ for (auto &File : InputFileList) {
// Instantiate a dynamic linker.
TrivialMemoryManager MemMgr;
- RuntimeDyld Dyld(&MemMgr);
+ RuntimeDyld Dyld(MemMgr, MemMgr);
// Load the input memory buffer.
- std::unique_ptr<MemoryBuffer> InputBuffer;
- std::unique_ptr<ObjectImage> LoadedObject;
- if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFileList[i],
- InputBuffer))
- return Error("unable to read input: '" + ec.message() + "'");
- // Load the object file
- LoadedObject.reset(Dyld.loadObject(new ObjectBuffer(InputBuffer.release())));
- if (!LoadedObject) {
- return Error(Dyld.getErrorString());
- }
+ 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()));
- // Resolve all the relocations we can.
- Dyld.resolveRelocations();
+ 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(
- DIContext::getDWARFContext(LoadedObject->getObjectFile()));
+ 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 (object::symbol_iterator I = LoadedObject->begin_symbols(),
- E = LoadedObject->end_symbols();
- I != E; ++I) {
- object::SymbolRef::Type SymType;
- if (I->getType(SymType)) continue;
- if (SymType == object::SymbolRef::ST_Function) {
- StringRef Name;
- uint64_t Addr;
- uint64_t Size;
- if (I->getName(Name)) continue;
- if (I->getAddress(Addr)) continue;
- if (I->getSize(Size)) continue;
-
- outs() << "Function: " << Name << ", Size = " << Size << "\n";
+ 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);
- DILineInfoTable::iterator Begin = Lines.begin();
- DILineInfoTable::iterator End = Lines.end();
- for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
- outs() << " Line info @ " << It->first - Addr << ": "
- << It->second.FileName << ", line:" << It->second.Line << "\n";
+ 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;
- RuntimeDyld Dyld(&MemMgr);
+ doPreallocation(MemMgr);
+ RuntimeDyld Dyld(MemMgr, MemMgr);
+
+ // FIXME: Preserve buffers until resolveRelocations time to work around a bug
+ // in RuntimeDyldELF.
+ // This fixme should be fixed ASAP. This is a very brittle workaround.
+ std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
// If we don't have any input files, read from stdin.
if (!InputFileList.size())
InputFileList.push_back("-");
- for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
+ for (auto &File : InputFileList) {
// Load the input memory buffer.
- std::unique_ptr<MemoryBuffer> InputBuffer;
- std::unique_ptr<ObjectImage> LoadedObject;
- if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFileList[i],
- InputBuffer))
- return Error("unable to read input: '" + ec.message() + "'");
+ 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;
+ InputBuffers.push_back(std::move(*InputBuffer));
// Load the object file
- LoadedObject.reset(Dyld.loadObject(new ObjectBuffer(InputBuffer.release())));
- if (!LoadedObject) {
+ Dyld.loadObject(Obj);
+ if (Dyld.hasError()) {
return Error(Dyld.getErrorString());
}
}
- // Resolve all the relocations we can.
- Dyld.resolveRelocations();
- // Clear instruction cache before code will be executed.
- MemMgr.invalidateInstructionCache();
-
+ // 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.getSymbolAddress(EntryPoint);
+ void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
if (!MainAddress)
return Error("no definition for '" + EntryPoint + "'");
// Invalidate the instruction cache for each loaded function.
- for (unsigned i = 0, e = MemMgr.FunctionMemory.size(); i != e; ++i) {
- sys::MemoryBlock &Data = MemMgr.FunctionMemory[i];
+ for (auto &FM : MemMgr.FunctionMemory) {
+
// Make sure the memory is executable.
+ // setExecutable will call InvalidateInstructionCache.
std::string ErrorStr;
- sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
- if (!sys::Memory::setExecutable(Data, &ErrorStr))
+ if (!sys::Memory::setExecutable(FM, &ErrorStr))
return Error("unable to mark function executable: '" + ErrorStr + "'");
}
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) {
+ errs() << "Invalid section specification '" << Mapping
+ << "'. Should be '<file name>,<section name>=<addr>'\n";
+ exit(1);
+ }
+
+ 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 != "") {
+ errs() << ErrorMsg;
+ exit(1);
+ }
+
+ 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)) {
+ errs() << "Invalid section address in mapping '" << Mapping << "'.\n";
+ exit(1);
+ }
+
+ 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) {
+ errs() << "Invalid dummy symbol specification '" << Mapping
+ << "'. Should be '<symbol name>=<addr>'\n";
+ exit(1);
+ }
+
+ std::string Symbol = Mapping.substr(0, EqualsIdx);
+ std::string AddrStr = Mapping.substr(EqualsIdx + 1);
+
+ uint64_t Addr;
+ if (StringRef(AddrStr).getAsInteger(0, Addr)) {
+ errs() << "Invalid symbol mapping '" << Mapping << "'.\n";
+ exit(1);
+ }
+
+ 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 == "") {
+ llvm::errs() << "Error: -triple required when running in -verify mode.\n";
+ return 1;
+ }
+
+ // 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) {
+ llvm::errs() << "Error accessing target '" << TripleName << "': "
+ << ErrorStr << "\n";
+ return 1;
+ }
+ TripleName = TheTriple.getTriple();
+
+ std::unique_ptr<MCSubtargetInfo> STI(
+ TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
+ assert(STI && "Unable to create subtarget info!");
+
+ std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
+ assert(MRI && "Unable to create target register info!");
+
+ std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
+ assert(MAI && "Unable to create target asm info!");
+
+ MCContext Ctx(MAI.get(), MRI.get(), nullptr);
+
+ std::unique_ptr<MCDisassembler> Disassembler(
+ TheTarget->createMCDisassembler(*STI, Ctx));
+ assert(Disassembler && "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());
+
+ // FIXME: Preserve buffers until resolveRelocations time to work around a bug
+ // in RuntimeDyldELF.
+ // This fixme should be fixed ASAP. This is a very brittle workaround.
+ std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
+
+ // 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;
+ InputBuffers.push_back(std::move(*InputBuffer));
+
+ // 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()) {
+ errs() << "RTDyld reported an error applying relocations:\n "
+ << Dyld.getErrorString() << "\n";
+ ErrorCode = 1;
+ }
+
+ 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();
+ return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false);
+ case AC_PrintObjectLineInfo:
+ return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false);
+ case AC_Verify:
+ return linkAndVerify();
}
}
projects / oota-llvm.git / blobdiff