757 lines
26 KiB
C++
757 lines
26 KiB
C++
//===-- llvm-rtdyld.cpp - MCJIT Testing Tool ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is a testing tool for use with the MC-JIT LLVM components.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringMap.h"
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#include "llvm/DebugInfo/DIContext.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
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#include "llvm/ExecutionEngine/RuntimeDyld.h"
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#include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDisassembler/MCDisassembler.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Object/MachO.h"
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#include "llvm/Object/SymbolSize.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Memory.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/raw_ostream.h"
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#include <list>
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#include <system_error>
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using namespace llvm;
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using namespace llvm::object;
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static cl::list<std::string>
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InputFileList(cl::Positional, cl::ZeroOrMore,
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cl::desc("<input file>"));
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enum ActionType {
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AC_Execute,
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AC_PrintObjectLineInfo,
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AC_PrintLineInfo,
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AC_PrintDebugLineInfo,
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AC_Verify
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};
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static cl::opt<ActionType>
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Action(cl::desc("Action to perform:"),
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cl::init(AC_Execute),
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cl::values(clEnumValN(AC_Execute, "execute",
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"Load, link, and execute the inputs."),
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clEnumValN(AC_PrintLineInfo, "printline",
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"Load, link, and print line information for each function."),
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clEnumValN(AC_PrintDebugLineInfo, "printdebugline",
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"Load, link, and print line information for each function using the debug object"),
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clEnumValN(AC_PrintObjectLineInfo, "printobjline",
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"Like -printlineinfo but does not load the object first"),
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clEnumValN(AC_Verify, "verify",
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"Load, link and verify the resulting memory image."),
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clEnumValEnd));
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static cl::opt<std::string>
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EntryPoint("entry",
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cl::desc("Function to call as entry point."),
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cl::init("_main"));
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static cl::list<std::string>
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Dylibs("dylib",
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cl::desc("Add library."),
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cl::ZeroOrMore);
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static cl::opt<std::string>
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TripleName("triple", cl::desc("Target triple for disassembler"));
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static cl::opt<std::string>
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MCPU("mcpu",
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cl::desc("Target a specific cpu type (-mcpu=help for details)"),
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cl::value_desc("cpu-name"),
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cl::init(""));
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static cl::list<std::string>
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CheckFiles("check",
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cl::desc("File containing RuntimeDyld verifier checks."),
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cl::ZeroOrMore);
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static cl::opt<uint64_t>
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PreallocMemory("preallocate",
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cl::desc("Allocate memory upfront rather than on-demand"),
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cl::init(0));
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static cl::opt<uint64_t>
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TargetAddrStart("target-addr-start",
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cl::desc("For -verify only: start of phony target address "
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"range."),
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cl::init(4096), // Start at "page 1" - no allocating at "null".
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cl::Hidden);
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static cl::opt<uint64_t>
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TargetAddrEnd("target-addr-end",
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cl::desc("For -verify only: end of phony target address range."),
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cl::init(~0ULL),
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cl::Hidden);
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static cl::opt<uint64_t>
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TargetSectionSep("target-section-sep",
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cl::desc("For -verify only: Separation between sections in "
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"phony target address space."),
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cl::init(0),
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cl::Hidden);
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static cl::list<std::string>
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SpecificSectionMappings("map-section",
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cl::desc("For -verify only: Map a section to a "
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"specific address."),
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cl::ZeroOrMore,
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cl::Hidden);
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static cl::list<std::string>
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DummySymbolMappings("dummy-extern",
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cl::desc("For -verify only: Inject a symbol into the extern "
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"symbol table."),
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cl::ZeroOrMore,
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cl::Hidden);
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static cl::opt<bool>
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PrintAllocationRequests("print-alloc-requests",
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cl::desc("Print allocation requests made to the memory "
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"manager by RuntimeDyld"),
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cl::Hidden);
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/* *** */
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// A trivial memory manager that doesn't do anything fancy, just uses the
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// support library allocation routines directly.
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class TrivialMemoryManager : public RTDyldMemoryManager {
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public:
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SmallVector<sys::MemoryBlock, 16> FunctionMemory;
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SmallVector<sys::MemoryBlock, 16> DataMemory;
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uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID,
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StringRef SectionName) override;
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uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID, StringRef SectionName,
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bool IsReadOnly) override;
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void *getPointerToNamedFunction(const std::string &Name,
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bool AbortOnFailure = true) override {
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return nullptr;
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}
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bool finalizeMemory(std::string *ErrMsg) override { return false; }
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void addDummySymbol(const std::string &Name, uint64_t Addr) {
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DummyExterns[Name] = Addr;
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}
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RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override {
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auto I = DummyExterns.find(Name);
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if (I != DummyExterns.end())
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return RuntimeDyld::SymbolInfo(I->second, JITSymbolFlags::Exported);
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return RTDyldMemoryManager::findSymbol(Name);
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}
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void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
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size_t Size) override {}
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void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr,
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size_t Size) override {}
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void preallocateSlab(uint64_t Size) {
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std::string Err;
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sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err);
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if (!MB.base())
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report_fatal_error("Can't allocate enough memory: " + Err);
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PreallocSlab = MB;
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UsePreallocation = true;
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SlabSize = Size;
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}
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uint8_t *allocateFromSlab(uintptr_t Size, unsigned Alignment, bool isCode) {
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Size = alignTo(Size, Alignment);
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if (CurrentSlabOffset + Size > SlabSize)
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report_fatal_error("Can't allocate enough memory. Tune --preallocate");
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uintptr_t OldSlabOffset = CurrentSlabOffset;
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sys::MemoryBlock MB((void *)OldSlabOffset, Size);
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if (isCode)
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FunctionMemory.push_back(MB);
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else
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DataMemory.push_back(MB);
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CurrentSlabOffset += Size;
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return (uint8_t*)OldSlabOffset;
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}
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private:
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std::map<std::string, uint64_t> DummyExterns;
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sys::MemoryBlock PreallocSlab;
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bool UsePreallocation = false;
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uintptr_t SlabSize = 0;
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uintptr_t CurrentSlabOffset = 0;
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};
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uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
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unsigned Alignment,
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unsigned SectionID,
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StringRef SectionName) {
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if (PrintAllocationRequests)
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outs() << "allocateCodeSection(Size = " << Size << ", Alignment = "
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<< Alignment << ", SectionName = " << SectionName << ")\n";
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if (UsePreallocation)
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return allocateFromSlab(Size, Alignment, true /* isCode */);
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std::string Err;
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sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err);
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if (!MB.base())
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report_fatal_error("MemoryManager allocation failed: " + Err);
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FunctionMemory.push_back(MB);
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return (uint8_t*)MB.base();
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}
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uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
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unsigned Alignment,
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unsigned SectionID,
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StringRef SectionName,
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bool IsReadOnly) {
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if (PrintAllocationRequests)
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outs() << "allocateDataSection(Size = " << Size << ", Alignment = "
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<< Alignment << ", SectionName = " << SectionName << ")\n";
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if (UsePreallocation)
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return allocateFromSlab(Size, Alignment, false /* isCode */);
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std::string Err;
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sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err);
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if (!MB.base())
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report_fatal_error("MemoryManager allocation failed: " + Err);
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DataMemory.push_back(MB);
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return (uint8_t*)MB.base();
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}
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static const char *ProgramName;
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static void ErrorAndExit(const Twine &Msg) {
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errs() << ProgramName << ": error: " << Msg << "\n";
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exit(1);
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}
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static void loadDylibs() {
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for (const std::string &Dylib : Dylibs) {
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if (!sys::fs::is_regular_file(Dylib))
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report_fatal_error("Dylib not found: '" + Dylib + "'.");
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std::string ErrMsg;
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if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
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report_fatal_error("Error loading '" + Dylib + "': " + ErrMsg);
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}
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}
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/* *** */
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static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
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assert(LoadObjects || !UseDebugObj);
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// Load any dylibs requested on the command line.
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loadDylibs();
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// If we don't have any input files, read from stdin.
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if (!InputFileList.size())
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InputFileList.push_back("-");
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for (auto &File : InputFileList) {
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// Instantiate a dynamic linker.
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TrivialMemoryManager MemMgr;
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RuntimeDyld Dyld(MemMgr, MemMgr);
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// Load the input memory buffer.
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ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
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MemoryBuffer::getFileOrSTDIN(File);
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if (std::error_code EC = InputBuffer.getError())
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ErrorAndExit("unable to read input: '" + EC.message() + "'");
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Expected<std::unique_ptr<ObjectFile>> MaybeObj(
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ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
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if (!MaybeObj) {
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std::string Buf;
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raw_string_ostream OS(Buf);
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logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
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OS.flush();
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ErrorAndExit("unable to create object file: '" + Buf + "'");
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}
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ObjectFile &Obj = **MaybeObj;
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OwningBinary<ObjectFile> DebugObj;
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std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
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ObjectFile *SymbolObj = &Obj;
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if (LoadObjects) {
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// Load the object file
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LoadedObjInfo =
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Dyld.loadObject(Obj);
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if (Dyld.hasError())
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ErrorAndExit(Dyld.getErrorString());
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// Resolve all the relocations we can.
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Dyld.resolveRelocations();
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if (UseDebugObj) {
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DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
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SymbolObj = DebugObj.getBinary();
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LoadedObjInfo.reset();
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}
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}
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std::unique_ptr<DIContext> Context(
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new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));
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std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
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object::computeSymbolSizes(*SymbolObj);
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// Use symbol info to iterate functions in the object.
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for (const auto &P : SymAddr) {
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object::SymbolRef Sym = P.first;
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Expected<SymbolRef::Type> TypeOrErr = Sym.getType();
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if (!TypeOrErr) {
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// TODO: Actually report errors helpfully.
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consumeError(TypeOrErr.takeError());
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continue;
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}
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SymbolRef::Type Type = *TypeOrErr;
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if (Type == object::SymbolRef::ST_Function) {
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Expected<StringRef> Name = Sym.getName();
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if (!Name) {
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// TODO: Actually report errors helpfully.
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consumeError(Name.takeError());
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continue;
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}
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Expected<uint64_t> AddrOrErr = Sym.getAddress();
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if (!AddrOrErr) {
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// TODO: Actually report errors helpfully.
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consumeError(AddrOrErr.takeError());
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continue;
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}
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uint64_t Addr = *AddrOrErr;
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uint64_t Size = P.second;
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// If we're not using the debug object, compute the address of the
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// symbol in memory (rather than that in the unrelocated object file)
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// and use that to query the DWARFContext.
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if (!UseDebugObj && LoadObjects) {
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auto SecOrErr = Sym.getSection();
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if (!SecOrErr) {
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// TODO: Actually report errors helpfully.
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consumeError(SecOrErr.takeError());
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continue;
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}
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object::section_iterator Sec = *SecOrErr;
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StringRef SecName;
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Sec->getName(SecName);
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uint64_t SectionLoadAddress =
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LoadedObjInfo->getSectionLoadAddress(*Sec);
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if (SectionLoadAddress != 0)
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Addr += SectionLoadAddress - Sec->getAddress();
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}
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outs() << "Function: " << *Name << ", Size = " << Size
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<< ", Addr = " << Addr << "\n";
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DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
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for (auto &D : Lines) {
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outs() << " Line info @ " << D.first - Addr << ": "
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<< D.second.FileName << ", line:" << D.second.Line << "\n";
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}
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}
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}
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}
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return 0;
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}
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static void doPreallocation(TrivialMemoryManager &MemMgr) {
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// Allocate a slab of memory upfront, if required. This is used if
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// we want to test small code models.
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if (static_cast<intptr_t>(PreallocMemory) < 0)
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report_fatal_error("Pre-allocated bytes of memory must be a positive integer.");
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// FIXME: Limit the amount of memory that can be preallocated?
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if (PreallocMemory != 0)
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MemMgr.preallocateSlab(PreallocMemory);
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}
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static int executeInput() {
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// Load any dylibs requested on the command line.
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loadDylibs();
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// Instantiate a dynamic linker.
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TrivialMemoryManager MemMgr;
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doPreallocation(MemMgr);
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RuntimeDyld Dyld(MemMgr, MemMgr);
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// If we don't have any input files, read from stdin.
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if (!InputFileList.size())
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InputFileList.push_back("-");
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for (auto &File : InputFileList) {
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// Load the input memory buffer.
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ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
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MemoryBuffer::getFileOrSTDIN(File);
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if (std::error_code EC = InputBuffer.getError())
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ErrorAndExit("unable to read input: '" + EC.message() + "'");
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Expected<std::unique_ptr<ObjectFile>> MaybeObj(
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ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
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if (!MaybeObj) {
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std::string Buf;
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raw_string_ostream OS(Buf);
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logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
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OS.flush();
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ErrorAndExit("unable to create object file: '" + Buf + "'");
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}
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ObjectFile &Obj = **MaybeObj;
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// Load the object file
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Dyld.loadObject(Obj);
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if (Dyld.hasError()) {
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ErrorAndExit(Dyld.getErrorString());
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}
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}
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// Resove all the relocations we can.
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// FIXME: Error out if there are unresolved relocations.
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Dyld.resolveRelocations();
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// Get the address of the entry point (_main by default).
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void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
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if (!MainAddress)
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ErrorAndExit("no definition for '" + EntryPoint + "'");
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// Invalidate the instruction cache for each loaded function.
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for (auto &FM : MemMgr.FunctionMemory) {
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// Make sure the memory is executable.
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// setExecutable will call InvalidateInstructionCache.
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std::string ErrorStr;
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if (!sys::Memory::setExecutable(FM, &ErrorStr))
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ErrorAndExit("unable to mark function executable: '" + ErrorStr + "'");
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}
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// Dispatch to _main().
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errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";
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int (*Main)(int, const char**) =
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(int(*)(int,const char**)) uintptr_t(MainAddress);
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const char **Argv = new const char*[2];
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// Use the name of the first input object module as argv[0] for the target.
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Argv[0] = InputFileList[0].c_str();
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Argv[1] = nullptr;
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return Main(1, Argv);
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}
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static int checkAllExpressions(RuntimeDyldChecker &Checker) {
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for (const auto& CheckerFileName : CheckFiles) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf =
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MemoryBuffer::getFileOrSTDIN(CheckerFileName);
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if (std::error_code EC = CheckerFileBuf.getError())
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ErrorAndExit("unable to read input '" + CheckerFileName + "': " +
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EC.message());
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if (!Checker.checkAllRulesInBuffer("# rtdyld-check:",
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CheckerFileBuf.get().get()))
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ErrorAndExit("some checks in '" + CheckerFileName + "' failed");
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}
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return 0;
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}
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static std::map<void *, uint64_t>
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applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
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std::map<void*, uint64_t> SpecificMappings;
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for (StringRef Mapping : SpecificSectionMappings) {
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size_t EqualsIdx = Mapping.find_first_of("=");
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std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
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size_t ComaIdx = Mapping.find_first_of(",");
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if (ComaIdx == StringRef::npos)
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report_fatal_error("Invalid section specification '" + Mapping +
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|
"'. 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 == "")
|
|
ErrorAndExit("-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)
|
|
ErrorAndExit("Error accessing target '" + TripleName + "': " + ErrorStr);
|
|
|
|
TripleName = TheTriple.getTriple();
|
|
|
|
std::unique_ptr<MCSubtargetInfo> STI(
|
|
TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
|
|
if (!STI)
|
|
ErrorAndExit("Unable to create subtarget info!");
|
|
|
|
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
|
|
if (!MRI)
|
|
ErrorAndExit("Unable to create target register info!");
|
|
|
|
std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
|
|
if (!MAI)
|
|
ErrorAndExit("Unable to create target asm info!");
|
|
|
|
MCContext Ctx(MAI.get(), MRI.get(), nullptr);
|
|
|
|
std::unique_ptr<MCDisassembler> Disassembler(
|
|
TheTarget->createMCDisassembler(*STI, Ctx));
|
|
if (!Disassembler)
|
|
ErrorAndExit("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())
|
|
ErrorAndExit("unable to read input: '" + EC.message() + "'");
|
|
|
|
Expected<std::unique_ptr<ObjectFile>> MaybeObj(
|
|
ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
|
|
|
|
if (!MaybeObj) {
|
|
std::string Buf;
|
|
raw_string_ostream OS(Buf);
|
|
logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
|
|
OS.flush();
|
|
ErrorAndExit("unable to create object file: '" + Buf + "'");
|
|
}
|
|
|
|
ObjectFile &Obj = **MaybeObj;
|
|
|
|
// Load the object file
|
|
Dyld.loadObject(Obj);
|
|
if (Dyld.hasError()) {
|
|
ErrorAndExit(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())
|
|
ErrorAndExit("RTDyld reported an error applying relocations:\n " +
|
|
Dyld.getErrorString());
|
|
|
|
return ErrorCode;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
sys::PrintStackTraceOnErrorSignal(argv[0]);
|
|
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();
|
|
}
|
|
}
|