forked from OSchip/llvm-project
588 lines
20 KiB
C++
588 lines
20 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/DWARF/DIContext.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.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/Object/MachO.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_PrintLineInfo,
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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_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::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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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("Map a section to a specific address."),
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cl::ZeroOrMore);
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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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// Invalidate instruction cache for sections with execute permissions.
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// Some platforms with separate data cache and instruction cache require
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// explicit cache flush, otherwise JIT code manipulations (like resolved
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// relocations) will get to the data cache but not to the instruction cache.
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virtual void invalidateInstructionCache();
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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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sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
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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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sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
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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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void TrivialMemoryManager::invalidateInstructionCache() {
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for (int i = 0, e = FunctionMemory.size(); i != e; ++i)
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sys::Memory::InvalidateInstructionCache(FunctionMemory[i].base(),
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FunctionMemory[i].size());
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for (int i = 0, e = DataMemory.size(); i != e; ++i)
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sys::Memory::InvalidateInstructionCache(DataMemory[i].base(),
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DataMemory[i].size());
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}
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static const char *ProgramName;
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static void Message(const char *Type, const Twine &Msg) {
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errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
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}
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static int Error(const Twine &Msg) {
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Message("error", Msg);
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return 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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std::string ErrMsg;
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if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
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llvm::errs() << "Error loading '" << Dylib << "': "
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<< ErrMsg << "\n";
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} else
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llvm::errs() << "Dylib not found: '" << Dylib << "'.\n";
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}
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}
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/* *** */
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static int printLineInfoForInput() {
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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(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
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// Instantiate a dynamic linker.
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TrivialMemoryManager MemMgr;
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RuntimeDyld Dyld(&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(InputFileList[i]);
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if (std::error_code EC = InputBuffer.getError())
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return Error("unable to read input: '" + EC.message() + "'");
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ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
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ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
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if (std::error_code EC = MaybeObj.getError())
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return Error("unable to create object file: '" + EC.message() + "'");
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ObjectFile &Obj = **MaybeObj;
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// Load the object file
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std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo =
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Dyld.loadObject(Obj);
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if (Dyld.hasError())
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return Error(Dyld.getErrorString());
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// Resolve all the relocations we can.
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Dyld.resolveRelocations();
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OwningBinary<ObjectFile> DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
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std::unique_ptr<DIContext> Context(
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DIContext::getDWARFContext(*DebugObj.getBinary()));
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// Use symbol info to iterate functions in the object.
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for (object::symbol_iterator I = DebugObj.getBinary()->symbol_begin(),
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E = DebugObj.getBinary()->symbol_end();
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I != E; ++I) {
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object::SymbolRef::Type SymType;
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if (I->getType(SymType)) continue;
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if (SymType == object::SymbolRef::ST_Function) {
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StringRef Name;
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uint64_t Addr;
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uint64_t Size;
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if (I->getName(Name)) continue;
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if (I->getAddress(Addr)) continue;
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if (I->getSize(Size)) continue;
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outs() << "Function: " << Name << ", Size = " << Size << "\n";
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DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
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DILineInfoTable::iterator Begin = Lines.begin();
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DILineInfoTable::iterator End = Lines.end();
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for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
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outs() << " Line info @ " << It->first - Addr << ": "
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<< It->second.FileName << ", line:" << It->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 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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RuntimeDyld Dyld(&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(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
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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(InputFileList[i]);
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if (std::error_code EC = InputBuffer.getError())
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return Error("unable to read input: '" + EC.message() + "'");
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ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
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ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
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if (std::error_code EC = MaybeObj.getError())
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return Error("unable to create object file: '" + EC.message() + "'");
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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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return Error(Dyld.getErrorString());
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}
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}
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// Resolve all the relocations we can.
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Dyld.resolveRelocations();
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// Clear instruction cache before code will be executed.
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MemMgr.invalidateInstructionCache();
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// FIXME: Error out if there are unresolved relocations.
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// Get the address of the entry point (_main by default).
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void *MainAddress = Dyld.getSymbolAddress(EntryPoint);
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if (!MainAddress)
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return Error("no definition for '" + EntryPoint + "'");
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// Invalidate the instruction cache for each loaded function.
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for (unsigned i = 0, e = MemMgr.FunctionMemory.size(); i != e; ++i) {
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sys::MemoryBlock &Data = MemMgr.FunctionMemory[i];
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// Make sure the memory is executable.
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std::string ErrorStr;
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sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
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if (!sys::Memory::setExecutable(Data, &ErrorStr))
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return Error("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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return Error("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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return Error("some checks in '" + CheckerFileName + "' failed");
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}
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return 0;
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}
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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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StringRef 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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errs() << "Invalid section specification '" << Mapping
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<< "'. Should be '<file name>,<section name>=<addr>'\n";
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exit(1);
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}
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StringRef FileName = SectionIDStr.substr(0, ComaIdx);
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StringRef SectionName = SectionIDStr.substr(ComaIdx + 1);
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uint64_t OldAddrInt;
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std::string ErrorMsg;
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std::tie(OldAddrInt, ErrorMsg) =
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Checker.getSectionAddr(FileName, SectionName, true);
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if (ErrorMsg != "") {
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errs() << ErrorMsg;
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exit(1);
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}
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void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
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StringRef NewAddrStr = Mapping.substr(EqualsIdx + 1);
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uint64_t NewAddr;
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if (NewAddrStr.getAsInteger(0, NewAddr)) {
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errs() << "Invalid section address in mapping: " << Mapping << "\n";
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exit(1);
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}
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Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
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SpecificMappings[OldAddr] = NewAddr;
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}
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return SpecificMappings;
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}
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// Scatter sections in all directions!
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// Remaps section addresses for -verify mode. The following command line options
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// can be used to customize the layout of the memory within the phony target's
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// address space:
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// -target-addr-start <s> -- Specify where the phony target addres range starts.
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// -target-addr-end <e> -- Specify where the phony target address range ends.
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// -target-section-sep <d> -- Specify how big a gap should be left between the
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// end of one section and the start of the next.
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// Defaults to zero. Set to something big
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// (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
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//
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void remapSections(const llvm::Triple &TargetTriple,
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const TrivialMemoryManager &MemMgr,
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RuntimeDyldChecker &Checker) {
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// Set up a work list (section addr/size pairs).
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typedef std::list<std::pair<void*, uint64_t>> WorklistT;
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WorklistT Worklist;
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for (const auto& CodeSection : MemMgr.FunctionMemory)
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Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
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for (const auto& DataSection : MemMgr.DataMemory)
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Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
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// Apply any section-specific mappings that were requested on the command
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// line.
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typedef std::map<void*, uint64_t> AppliedMappingsT;
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AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker);
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// Keep an "already allocated" mapping of section target addresses to sizes.
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// Sections whose address mappings aren't specified on the command line will
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// allocated around the explicitly mapped sections while maintaining the
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// minimum separation.
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std::map<uint64_t, uint64_t> AlreadyAllocated;
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// Move the previously applied mappings into the already-allocated map.
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for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
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I != E;) {
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WorklistT::iterator Tmp = I;
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++I;
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AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first);
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if (AI != AppliedMappings.end()) {
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AlreadyAllocated[AI->second] = Tmp->second;
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Worklist.erase(Tmp);
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}
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}
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// If the -target-addr-end option wasn't explicitly passed, then set it to a
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// sensible default based on the target triple.
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if (TargetAddrEnd.getNumOccurrences() == 0) {
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if (TargetTriple.isArch16Bit())
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TargetAddrEnd = (1ULL << 16) - 1;
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else if (TargetTriple.isArch32Bit())
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TargetAddrEnd = (1ULL << 32) - 1;
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// TargetAddrEnd already has a sensible default for 64-bit systems, so
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// there's nothing to do in the 64-bit case.
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}
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// Process any elements remaining in the worklist.
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while (!Worklist.empty()) {
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std::pair<void*, uint64_t> CurEntry = Worklist.front();
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Worklist.pop_front();
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uint64_t NextSectionAddr = TargetAddrStart;
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for (const auto &Alloc : AlreadyAllocated)
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if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
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break;
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else
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NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
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AlreadyAllocated[NextSectionAddr] = CurEntry.second;
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Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
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}
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}
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// Load and link the objects specified on the command line, but do not execute
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// anything. Instead, attach a RuntimeDyldChecker instance and call it to
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// verify the correctness of the linked memory.
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static int linkAndVerify() {
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// Check for missing triple.
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if (TripleName == "") {
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llvm::errs() << "Error: -triple required when running in -verify mode.\n";
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return 1;
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}
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// Look up the target and build the disassembler.
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Triple TheTriple(Triple::normalize(TripleName));
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std::string ErrorStr;
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const Target *TheTarget =
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TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
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if (!TheTarget) {
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llvm::errs() << "Error accessing target '" << TripleName << "': "
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<< ErrorStr << "\n";
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return 1;
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}
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TripleName = TheTriple.getTriple();
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std::unique_ptr<MCSubtargetInfo> STI(
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TheTarget->createMCSubtargetInfo(TripleName, "", ""));
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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(0, *MAI, *MII, *MRI, *STI));
|
|
|
|
// Load any dylibs requested on the command line.
|
|
loadDylibs();
|
|
|
|
// Instantiate a dynamic linker.
|
|
TrivialMemoryManager MemMgr;
|
|
RuntimeDyld Dyld(&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(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
|
|
// Load the input memory buffer.
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
|
|
MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
|
|
|
|
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.
|
|
remapSections(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_PrintLineInfo:
|
|
return printLineInfoForInput();
|
|
case AC_Verify:
|
|
return linkAndVerify();
|
|
}
|
|
}
|