C++ lldb::ModuleSP类代码示例

ObjectFile::ObjectFile(const lldb::ModuleSP &module_sp,
                       const FileSpec *file_spec_ptr,
                       lldb::offset_t file_offset, lldb::offset_t length,
                       const lldb::DataBufferSP &data_sp,
                       lldb::offset_t data_offset)
    : ModuleChild(module_sp),
      m_file(), // This file could be different from the original module's file
      m_type(eTypeInvalid), m_strata(eStrataInvalid),
      m_file_offset(file_offset), m_length(length), m_data(),
      m_unwind_table(*this), m_process_wp(),
      m_memory_addr(LLDB_INVALID_ADDRESS), m_sections_ap(), m_symtab_ap(),
      m_synthetic_symbol_idx(0) {
  if (file_spec_ptr)
    m_file = *file_spec_ptr;
  if (data_sp)
    m_data.SetData(data_sp, data_offset, length);
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
  if (log)
    log->Printf("%p ObjectFile::ObjectFile() module = %p (%s), file = %s, "
                "file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64,
                static_cast<void *>(this), static_cast<void *>(module_sp.get()),
                module_sp->GetSpecificationDescription().c_str(),
                m_file ? m_file.GetPath().c_str() : "<NULL>", m_file_offset,
                m_length);
}

ObjectFile::ObjectFile (const lldb::ModuleSP &module_sp, 
                        const ProcessSP &process_sp,
                        lldb::addr_t header_addr, 
                        DataBufferSP& header_data_sp) :
    ModuleChild (module_sp),
    m_file (),
    m_type (eTypeInvalid),
    m_strata (eStrataInvalid),
    m_file_offset (0),
    m_length (0),
    m_data (),
    m_unwind_table (*this),
    m_process_wp (process_sp),
    m_memory_addr (header_addr),
    m_sections_ap (),
    m_symtab_ap (),
    m_symtab_unified_ap (),
    m_symtab_unified_revisionid (0)
{
    if (header_data_sp)
        m_data.SetData (header_data_sp, 0, header_data_sp->GetByteSize());
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
    if (log)
    {
        log->Printf ("%p ObjectFile::ObjectFile() module = %p (%s), process = %p, header_addr = 0x%" PRIx64,
                     this,
                     module_sp.get(),
                     module_sp->GetSpecificationDescription().c_str(),
                     process_sp.get(),
                     m_memory_addr);
    }
}

ObjectFile::ObjectFile (const lldb::ModuleSP &module_sp, 
                        const ProcessSP &process_sp,
                        lldb::addr_t header_addr, 
                        DataBufferSP& header_data_sp) :
    ModuleChild (module_sp),
    m_file (),
    m_type (eTypeInvalid),
    m_strata (eStrataInvalid),
    m_offset (header_addr),
    m_length (0),
    m_data (),
    m_unwind_table (*this),
    m_process_wp (process_sp),
    m_memory_addr (header_addr)
{    
    if (header_data_sp)
        m_data.SetData (header_data_sp, 0, header_data_sp->GetByteSize());
    LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
    if (log)
    {
        log->Printf ("%p ObjectFile::ObjectFile () module = %s/%s, process = %p, header_addr = 0x%llx\n",
                     this,
                     module_sp->GetFileSpec().GetDirectory().AsCString(),
                     module_sp->GetFileSpec().GetFilename().AsCString(),
                     process_sp.get(),
                     m_offset);
    }
}

ObjectFileSP
ObjectFile::FindPlugin (const lldb::ModuleSP &module_sp, 
                        const ProcessSP &process_sp,
                        lldb::addr_t header_addr,
                        DataBufferSP &file_data_sp)
{
    ObjectFileSP object_file_sp;
    
    if (module_sp)
    {
        Timer scoped_timer (__PRETTY_FUNCTION__,
                            "ObjectFile::FindPlugin (module = %s/%s, process = %p, header_addr = 0x%llx)",
                            module_sp->GetFileSpec().GetDirectory().AsCString(),
                            module_sp->GetFileSpec().GetFilename().AsCString(),
                            process_sp.get(), header_addr);
        uint32_t idx;
        
        // Check if this is a normal object file by iterating through
        // all object file plugin instances.
        ObjectFileCreateMemoryInstance create_callback;
        for (idx = 0; (create_callback = PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(idx)) != NULL; ++idx)
        {
            object_file_sp.reset (create_callback(module_sp, file_data_sp, process_sp, header_addr));
            if (object_file_sp.get())
                return object_file_sp;
        }
        
    }
    // We didn't find it, so clear our shared pointer in case it
    // contains anything and return an empty shared pointer
    object_file_sp.reset();
    return object_file_sp;
}

bool AddressSanitizerRuntime::CheckIfRuntimeIsValid(
    const lldb::ModuleSP module_sp) {
  const Symbol *symbol = module_sp->FindFirstSymbolWithNameAndType(
      ConstString("__asan_get_alloc_stack"), lldb::eSymbolTypeAny);

  return symbol != nullptr;
}

ObjectFileSP ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp,
                                    const ProcessSP &process_sp,
                                    lldb::addr_t header_addr,
                                    DataBufferSP &data_sp) {
  ObjectFileSP object_file_sp;

  if (module_sp) {
    Timer scoped_timer(LLVM_PRETTY_FUNCTION, "ObjectFile::FindPlugin (module = "
                                             "%s, process = %p, header_addr = "
                                             "0x%" PRIx64 ")",
                       module_sp->GetFileSpec().GetPath().c_str(),
                       static_cast<void *>(process_sp.get()), header_addr);
    uint32_t idx;

    // Check if this is a normal object file by iterating through
    // all object file plugin instances.
    ObjectFileCreateMemoryInstance create_callback;
    for (idx = 0;
         (create_callback =
              PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(idx)) !=
         nullptr;
         ++idx) {
      object_file_sp.reset(
          create_callback(module_sp, data_sp, process_sp, header_addr));
      if (object_file_sp.get())
        return object_file_sp;
    }
  }

  // We didn't find it, so clear our shared pointer in case it
  // contains anything and return an empty shared pointer
  object_file_sp.reset();
  return object_file_sp;
}

static DWARFExpression MakeRegisterBasedLocationExpressionInternal(
    llvm::codeview::RegisterId reg, llvm::Optional<int32_t> relative_offset,
    lldb::ModuleSP module) {
  return MakeLocationExpressionInternal(
      module, [&](Stream &stream, RegisterKind &register_kind) -> bool {
        uint32_t reg_num = GetRegisterNumber(
            module->GetArchitecture().GetMachine(), reg, register_kind);
        if (reg_num == LLDB_INVALID_REGNUM)
          return false;

        if (reg_num > 31) {
          llvm::dwarf::LocationAtom base = relative_offset
                                               ? llvm::dwarf::DW_OP_bregx
                                               : llvm::dwarf::DW_OP_regx;
          stream.PutHex8(base);
          stream.PutULEB128(reg_num);
        } else {
          llvm::dwarf::LocationAtom base = relative_offset
                                               ? llvm::dwarf::DW_OP_breg0
                                               : llvm::dwarf::DW_OP_reg0;
          stream.PutHex8(base + reg_num);
        }

        if (relative_offset)
          stream.PutSLEB128(*relative_offset);

        return true;
      });
}

    void VerifyLineEntry(lldb::ModuleSP module, const SymbolContext &sc,
                         const FileSpec &spec, LineTable &lt, uint32_t line,
                         lldb::addr_t addr) {
        LineEntry entry;
        Address address;
        EXPECT_TRUE(module->ResolveFileAddress(addr, address));

        EXPECT_TRUE(lt.FindLineEntryByAddress(address, entry));
        EXPECT_EQ(line, entry.line);
        EXPECT_EQ(address, entry.range.GetBaseAddress());

        EXPECT_TRUE(FileSpecMatchesAsBaseOrFull(spec, entry.file));
    }

bool
PlatformDarwin::ModuleIsExcludedForNonModuleSpecificSearches (lldb_private::Target &target, const lldb::ModuleSP &module_sp)
{
    if (!module_sp)
        return false;
        
    ObjectFile *obj_file = module_sp->GetObjectFile();
    if (!obj_file)
        return false;
    
    ObjectFile::Type obj_type = obj_file->GetType();
    if (obj_type == ObjectFile::eTypeDynamicLinker)
        return true;
    else
        return false;
}

lldb::addr_t
DynamicLoaderPOSIXDYLD::GetThreadLocalData (const lldb::ModuleSP module, const lldb::ThreadSP thread)
{
    auto it = m_loaded_modules.find (module);
    if (it == m_loaded_modules.end())
        return LLDB_INVALID_ADDRESS;

    addr_t link_map = it->second;
    if (link_map == LLDB_INVALID_ADDRESS)
        return LLDB_INVALID_ADDRESS;

    const DYLDRendezvous::ThreadInfo &metadata = m_rendezvous.GetThreadInfo();
    if (!metadata.valid)
        return LLDB_INVALID_ADDRESS;

    // Get the thread pointer.
    addr_t tp = thread->GetThreadPointer ();
    if (tp == LLDB_INVALID_ADDRESS)
        return LLDB_INVALID_ADDRESS;

    // Find the module's modid.
    int modid_size = 4;  // FIXME(spucci): This isn't right for big-endian 64-bit
    int64_t modid = ReadUnsignedIntWithSizeInBytes (link_map + metadata.modid_offset, modid_size);
    if (modid == -1)
        return LLDB_INVALID_ADDRESS;

    // Lookup the DTV structure for this thread.
    addr_t dtv_ptr = tp + metadata.dtv_offset;
    addr_t dtv = ReadPointer (dtv_ptr);
    if (dtv == LLDB_INVALID_ADDRESS)
        return LLDB_INVALID_ADDRESS;

    // Find the TLS block for this module.
    addr_t dtv_slot = dtv + metadata.dtv_slot_size*modid;
    addr_t tls_block = ReadPointer (dtv_slot + metadata.tls_offset);

    Module *mod = module.get();
    Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
    if (log)
        log->Printf("DynamicLoaderPOSIXDYLD::Performed TLS lookup: "
                    "module=%s, link_map=0x%" PRIx64 ", tp=0x%" PRIx64 ", modid=%" PRId64 ", tls_block=0x%" PRIx64 "\n",
                    mod->GetObjectName().AsCString(""), link_map, tp, (int64_t)modid, tls_block);

    return tls_block;
}

void
DynamicLoaderPOSIXDYLD::ResolveExecutableModule (lldb::ModuleSP &module_sp)
{
    Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));

    if (m_process == nullptr)
        return;

    auto &target = m_process->GetTarget ();
    const auto platform_sp = target.GetPlatform ();

    ProcessInstanceInfo process_info;
    if (!platform_sp->GetProcessInfo (m_process->GetID (), process_info))
    {
        if (log)
            log->Printf ("DynamicLoaderPOSIXDYLD::%s - failed to get process info for pid %" PRIu64,
                         __FUNCTION__, m_process->GetID ());
        return;
    }

    if (log)
        log->Printf ("DynamicLoaderPOSIXDYLD::%s - got executable by pid %" PRIu64 ": %s",
                     __FUNCTION__, m_process->GetID (), process_info.GetExecutableFile ().GetPath ().c_str ());

    ModuleSpec module_spec (process_info.GetExecutableFile (), process_info.GetArchitecture ());
    if (module_sp && module_sp->MatchesModuleSpec (module_spec))
        return;

    const auto executable_search_paths (Target::GetDefaultExecutableSearchPaths());
    auto error = platform_sp->ResolveExecutable (
        module_spec, module_sp, !executable_search_paths.IsEmpty() ? &executable_search_paths : nullptr);
    if (error.Fail ())
    {
        StreamString stream;
        module_spec.Dump (stream);

        if (log)
            log->Printf ("DynamicLoaderPOSIXDYLD::%s - failed to resolve executable with module spec \"%s\": %s",
                         __FUNCTION__, stream.GetString ().c_str (), error.AsCString ());
        return;
    }

    target.SetExecutableModule (module_sp, false);
}

lldb_private::Error
PlatformMacOSX::GetSharedModule (const lldb_private::ModuleSpec &module_spec,
                                 Process* process,
                                 lldb::ModuleSP &module_sp,
                                 const lldb_private::FileSpecList *module_search_paths_ptr,
                                 lldb::ModuleSP *old_module_sp_ptr,
                                 bool *did_create_ptr)
{
    Error error = GetSharedModuleWithLocalCache(module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr, did_create_ptr);
    
    if (module_sp)
    {
        if (module_spec.GetArchitecture().GetCore() == ArchSpec::eCore_x86_64_x86_64h)
        {
            ObjectFile *objfile = module_sp->GetObjectFile();
            if (objfile == NULL)
            {
                // We didn't find an x86_64h slice, fall back to a x86_64 slice
                ModuleSpec module_spec_x86_64 (module_spec);
                module_spec_x86_64.GetArchitecture() = ArchSpec("x86_64-apple-macosx");
                lldb::ModuleSP x86_64_module_sp;
                lldb::ModuleSP old_x86_64_module_sp;
                bool did_create = false;
                Error x86_64_error = GetSharedModuleWithLocalCache(module_spec_x86_64, x86_64_module_sp, module_search_paths_ptr, &old_x86_64_module_sp, &did_create);
                if (x86_64_module_sp && x86_64_module_sp->GetObjectFile())
                {
                    module_sp = x86_64_module_sp;
                    if (old_module_sp_ptr)
                        *old_module_sp_ptr = old_x86_64_module_sp;
                    if (did_create_ptr)
                        *did_create_ptr = did_create;
                    return x86_64_error;
                }
            }
        }
    }
    return error;
}

static DWARFExpression MakeLocationExpressionInternal(lldb::ModuleSP module,
                                                      StreamWriter &&writer) {
  const ArchSpec &architecture = module->GetArchitecture();
  ByteOrder byte_order = architecture.GetByteOrder();
  uint32_t address_size = architecture.GetAddressByteSize();
  uint32_t byte_size = architecture.GetDataByteSize();
  if (byte_order == eByteOrderInvalid || address_size == 0)
    return DWARFExpression(nullptr);

  RegisterKind register_kind = eRegisterKindDWARF;
  StreamBuffer<32> stream(Stream::eBinary, address_size, byte_order);

  if (!writer(stream, register_kind))
    return DWARFExpression(nullptr);

  DataBufferSP buffer =
      std::make_shared<DataBufferHeap>(stream.GetData(), stream.GetSize());
  DataExtractor extractor(buffer, byte_order, address_size, byte_size);
  DWARFExpression result(module, extractor, nullptr, 0, buffer->GetByteSize());
  result.SetRegisterKind(register_kind);

  return result;
}

Error ModuleCache::GetAndPut(const FileSpec &root_dir_spec,
                             const char *hostname,
                             const ModuleSpec &module_spec,
                             const ModuleDownloader &module_downloader,
                             const SymfileDownloader &symfile_downloader,
                             lldb::ModuleSP &cached_module_sp,
                             bool *did_create_ptr) {
  const auto module_spec_dir =
      GetModuleDirectory(root_dir_spec, module_spec.GetUUID());
  auto error = MakeDirectory(module_spec_dir);
  if (error.Fail())
    return error;

  ModuleLock lock(root_dir_spec, module_spec.GetUUID(), error);
  if (error.Fail())
    return Error("Failed to lock module %s: %s",
                 module_spec.GetUUID().GetAsString().c_str(),
                 error.AsCString());

  const auto escaped_hostname(GetEscapedHostname(hostname));
  // Check local cache for a module.
  error = Get(root_dir_spec, escaped_hostname.c_str(), module_spec,
              cached_module_sp, did_create_ptr);
  if (error.Success())
    return error;

  const auto tmp_download_file_spec = JoinPath(module_spec_dir, kTempFileName);
  error = module_downloader(module_spec, tmp_download_file_spec);
  llvm::FileRemover tmp_file_remover(tmp_download_file_spec.GetPath().c_str());
  if (error.Fail())
    return Error("Failed to download module: %s", error.AsCString());

  // Put downloaded file into local module cache.
  error = Put(root_dir_spec, escaped_hostname.c_str(), module_spec,
              tmp_download_file_spec, module_spec.GetFileSpec());
  if (error.Fail())
    return Error("Failed to put module into cache: %s", error.AsCString());

  tmp_file_remover.releaseFile();
  error = Get(root_dir_spec, escaped_hostname.c_str(), module_spec,
              cached_module_sp, did_create_ptr);
  if (error.Fail())
    return error;

  // Fetching a symbol file for the module
  const auto tmp_download_sym_file_spec =
      JoinPath(module_spec_dir, kTempSymFileName);
  error = symfile_downloader(cached_module_sp, tmp_download_sym_file_spec);
  llvm::FileRemover tmp_symfile_remover(
      tmp_download_sym_file_spec.GetPath().c_str());
  if (error.Fail())
    // Failed to download a symfile but fetching the module was successful. The
    // module might
    // contain the necessary symbols and the debugging is also possible without
    // a symfile.
    return Error();

  error = Put(root_dir_spec, escaped_hostname.c_str(), module_spec,
              tmp_download_sym_file_spec,
              GetSymbolFileSpec(module_spec.GetFileSpec()));
  if (error.Fail())
    return Error("Failed to put symbol file into cache: %s", error.AsCString());

  tmp_symfile_remover.releaseFile();

  FileSpec symfile_spec = GetSymbolFileSpec(cached_module_sp->GetFileSpec());
  cached_module_sp->SetSymbolFileFileSpec(symfile_spec);
  return Error();
}

Error
PlatformKalimba::ResolveExecutable (const FileSpec &exe_file,
                                  const ArchSpec &exe_arch,
                                  lldb::ModuleSP &exe_module_sp,
                                  const FileSpecList *module_search_paths_ptr)
{
    Error error;
    char exe_path[PATH_MAX];
    FileSpec resolved_exe_file (exe_file);

    if (!resolved_exe_file.Exists())
    {
        exe_file.GetPath(exe_path, sizeof(exe_path));
        error.SetErrorStringWithFormat("unable to find executable for '%s'", exe_path);
    }

    if (error.Success())
    {
        ModuleSpec module_spec (resolved_exe_file, exe_arch);
        if (exe_arch.IsValid())
        {
            error = ModuleList::GetSharedModule (module_spec, 
                                                 exe_module_sp, 
                                                 NULL, 
                                                 NULL,
                                                 NULL);
            if (error.Fail())
            {
                // If we failed, it may be because the vendor and os aren't known. If that is the
                // case, try setting them to the host architecture and give it another try.
                llvm::Triple &module_triple = module_spec.GetArchitecture().GetTriple(); 
                bool is_vendor_specified = (module_triple.getVendor() != llvm::Triple::UnknownVendor);
                bool is_os_specified = (module_triple.getOS() != llvm::Triple::UnknownOS);
                if (!is_vendor_specified || !is_os_specified)
                {
                    const llvm::Triple &host_triple = Host::GetArchitecture (Host::eSystemDefaultArchitecture).GetTriple();

                    if (!is_vendor_specified)
                        module_triple.setVendorName (host_triple.getVendorName());
                    if (!is_os_specified)
                        module_triple.setOSName (host_triple.getOSName());

                    error = ModuleList::GetSharedModule (module_spec, 
                                                         exe_module_sp, 
                                                         NULL, 
                                                         NULL,
                                                         NULL);
                }
            }
        
            // TODO find out why exe_module_sp might be NULL            
            if (!exe_module_sp || exe_module_sp->GetObjectFile() == NULL)
            {
                exe_module_sp.reset();
                error.SetErrorStringWithFormat ("'%s' doesn't contain the architecture %s",
                                                exe_file.GetPath().c_str(),
                                                exe_arch.GetArchitectureName());
            }
        }
        else
        {
            // No valid architecture was specified, ask the platform for
            // the architectures that we should be using (in the correct order)
            // and see if we can find a match that way
            StreamString arch_names;
            for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, module_spec.GetArchitecture()); ++idx)
            {
                error = ModuleList::GetSharedModule (module_spec, 
                                                     exe_module_sp, 
                                                     NULL, 
                                                     NULL,
                                                     NULL);
                // Did we find an executable using one of the 
                if (error.Success())
                {
                    if (exe_module_sp && exe_module_sp->GetObjectFile())
                        break;
                    else
                        error.SetErrorToGenericError();
                }
                
                if (idx > 0)
                    arch_names.PutCString (", ");
                arch_names.PutCString (module_spec.GetArchitecture().GetArchitectureName());
            }
            
            if (error.Fail() || !exe_module_sp)
            {
                error.SetErrorStringWithFormat ("'%s' doesn't contain any '%s' platform architectures: %s",
                                                exe_file.GetPath().c_str(),
                                                GetPluginName().GetCString(),
                                                arch_names.GetString().c_str());
            }
        }
    }

    return error;
}