C++ FileSpec::GetFilename方法代码示例

Error
ModuleCache::Get (const FileSpec &root_dir_spec,
                  const char *hostname,
                  const UUID &uuid,
                  const FileSpec &platform_module_spec,
                  FileSpec &cached_module_spec)
{
    cached_module_spec.Clear ();

    const auto module_spec_dir = GetModuleDirectory (root_dir_spec, uuid);
    const auto module_file_path = JoinPath (module_spec_dir, platform_module_spec.GetFilename ().AsCString ());

    Error error;
    if (!module_file_path.Exists ())
    {
        error.SetErrorStringWithFormat ("module %s not found", module_file_path.GetPath ().c_str ());
        return error;
    }
    cached_module_spec = module_file_path;

    // We may have already cached module but downloaded from an another host - in this case let's create a symlink to it.
    const auto sysroot_module_path_spec = GetHostSysRootModulePath (root_dir_spec, hostname, platform_module_spec);
    if (!sysroot_module_path_spec.Exists ())
        CreateHostSysRootModuleSymLink (sysroot_module_path_spec, cached_module_spec);

    return error;
}

//------------------------------------------------------------------
// Find the index of the file in the file spec list that matches
// "file_spec" starting "start_idx" entries into the file spec list.
//
// Returns the valid index of the file that matches "file_spec" if
// it is found, else UINT32_MAX is returned.
//------------------------------------------------------------------
uint32_t
FileSpecList::FindFileIndex (uint32_t start_idx, const FileSpec &file_spec, bool full) const
{
    const uint32_t num_files = m_files.size();
    uint32_t idx;

    // When looking for files, we will compare only the filename if the
    // FILE_SPEC argument is empty
    bool compare_filename_only = file_spec.GetDirectory().IsEmpty();

    for (idx = start_idx; idx < num_files; ++idx)
    {
        if (compare_filename_only)
        {
            if (m_files[idx].GetFilename() == file_spec.GetFilename())
                return idx;
        }
        else
        {
            if (FileSpec::Equal (m_files[idx], file_spec, full))
                return idx;
        }
    }

    // We didn't find the file, return an invalid index
    return UINT32_MAX;
}

Error
ModuleCache::Put (const FileSpec &root_dir_spec,
                  const char *hostname,
                  const UUID &uuid,
                  const FileSpec &platform_module_spec,
                  const FileSpec &tmp_file)
{
    const auto module_spec_dir = GetModuleDirectory (root_dir_spec, uuid);
    auto error = MakeDirectory (module_spec_dir);
    if (error.Fail ())
        return error;

    const auto module_file_path = JoinPath (module_spec_dir, platform_module_spec.GetFilename ().AsCString ());

    const auto tmp_file_path = tmp_file.GetPath ();
    const auto err_code = llvm::sys::fs::copy_file (tmp_file_path.c_str (), module_file_path.GetPath ().c_str ());
    if (err_code)
    {
        error.SetErrorStringWithFormat ("failed to copy file %s to %s: %s",
                                        tmp_file_path.c_str (),
                                        module_file_path.GetPath ().c_str (),
                                        err_code.message ().c_str ());
    }

    // Create sysroot link to a module.
    const auto sysroot_module_path_spec = GetHostSysRootModulePath (root_dir_spec, hostname, platform_module_spec);
    return CreateHostSysRootModuleSymLink (sysroot_module_path_spec, module_file_path);
}

FileSpec::EnumerateDirectoryResult DiskFilesOrDirectoriesCallback(void *baton, FileSpec::FileType file_type, const FileSpec &spec)
{
    const char *name = spec.GetFilename().AsCString();

    const DiskFilesOrDirectoriesBaton *parameters = (DiskFilesOrDirectoriesBaton*)baton;
    char *end_ptr = parameters->end_ptr;
    char *partial_name_copy = parameters->partial_name_copy;
    const char *remainder = parameters->remainder;

    // Omit ".", ".." and any . files if the match string doesn't start with .
    if (name[0] == '.')
    {
        if (name[1] == '\0')
            return FileSpec::eEnumerateDirectoryResultNext;
        else if (name[1] == '.' && name[2] == '\0')
            return FileSpec::eEnumerateDirectoryResultNext;
        else if (remainder[0] != '.')
            return FileSpec::eEnumerateDirectoryResultNext;
    }

    // If we found a directory, we put a "/" at the end of the name.

    if (remainder[0] == '\0' || strstr(name, remainder) == name)
    {
        if (strlen(name) + parameters->baselen >= PATH_MAX)
            return FileSpec::eEnumerateDirectoryResultNext;

        strcpy(end_ptr, name);

        bool isa_directory = false;
        if (file_type == FileSpec::eFileTypeDirectory)
            isa_directory = true;
        else if (file_type == FileSpec::eFileTypeSymbolicLink)
        {
            struct stat stat_buf;
            if ((stat(partial_name_copy, &stat_buf) == 0) && S_ISDIR(stat_buf.st_mode))
                isa_directory = true;
        }

        if (isa_directory)
        {
            *parameters->saw_directory = true;
            size_t len = strlen(parameters->partial_name_copy);
            partial_name_copy[len] = '/';
            partial_name_copy[len + 1] = '\0';
        }
        if (parameters->only_directories && !isa_directory)
            return FileSpec::eEnumerateDirectoryResultNext;
        parameters->matches->AppendString(partial_name_copy);
    }

    return FileSpec::eEnumerateDirectoryResultNext;
}

ModuleSP
Target::GetSharedModule
(
    const FileSpec& file_spec,
    const ArchSpec& arch,
    const lldb_private::UUID *uuid_ptr,
    const ConstString *object_name,
    off_t object_offset,
    Error *error_ptr
)
{
    // Don't pass in the UUID so we can tell if we have a stale value in our list
    ModuleSP old_module_sp; // This will get filled in if we have a new version of the library
    bool did_create_module = false;
    ModuleSP module_sp;

    // If there are image search path entries, try to use them first to acquire a suitable image.

    Error error;

    if (m_image_search_paths.GetSize())
    {
        FileSpec transformed_spec;
        if (m_image_search_paths.RemapPath (file_spec.GetDirectory(), transformed_spec.GetDirectory()))
        {
            transformed_spec.GetFilename() = file_spec.GetFilename();
            error = ModuleList::GetSharedModule (transformed_spec, arch, uuid_ptr, object_name, object_offset, module_sp, &old_module_sp, &did_create_module);
        }
    }

    // If a module hasn't been found yet, use the unmodified path.

    if (!module_sp)
    {
        error = (ModuleList::GetSharedModule (file_spec, arch, uuid_ptr, object_name, object_offset, module_sp, &old_module_sp, &did_create_module));
    }

    if (module_sp)
    {
        m_images.Append (module_sp);
        if (did_create_module)
        {
            if (old_module_sp && m_images.GetIndexForModule (old_module_sp.get()) != LLDB_INVALID_INDEX32)
                ModuleUpdated(old_module_sp, module_sp);
            else
                ModuleAdded(module_sp);
        }
    }
    if (error_ptr)
        *error_ptr = error;
    return module_sp;
}

static FileSpec::EnumerateDirectoryResult
EnumerateDirectoryCallback(void *baton, FileSpec::FileType file_type,
                           const FileSpec &file_spec) {
    if (file_type == FileSpec::eFileTypeDirectory) {
        const char *filename = file_spec.GetFilename().GetCString();
        if (filename &&
                strncmp(filename, "iPhoneSimulator", strlen("iPhoneSimulator")) == 0) {
            ::snprintf((char *)baton, PATH_MAX, "%s", filename);
            return FileSpec::eEnumerateDirectoryResultQuit;
        }
    }
    return FileSpec::eEnumerateDirectoryResultNext;
}

Error
Platform::ResolveExecutable (const FileSpec &exe_file,
                             const ArchSpec &exe_arch,
                             lldb::ModuleSP &exe_module_sp)
{
    Error error;
    if (exe_file.Exists())
    {
        if (exe_arch.IsValid())
        {
            error = ModuleList::GetSharedModule (exe_file, 
                                                 exe_arch, 
                                                 NULL,
                                                 NULL, 
                                                 0, 
                                                 exe_module_sp, 
                                                 NULL, 
                                                 NULL);
        }
        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
            ArchSpec platform_arch;
            for (uint32_t idx = 0; GetSupportedArchitectureAtIndex (idx, platform_arch); ++idx)
            {
                error = ModuleList::GetSharedModule (exe_file, 
                                                     platform_arch, 
                                                     NULL,
                                                     NULL, 
                                                     0, 
                                                     exe_module_sp, 
                                                     NULL, 
                                                     NULL);
                // Did we find an executable using one of the 
                if (error.Success() && exe_module_sp)
                    break;
            }
        }
    }
    else
    {
        error.SetErrorStringWithFormat ("'%s%s%s' does not exist",
                                        exe_file.GetDirectory().AsCString(""),
                                        exe_file.GetDirectory() ? "/" : "",
                                        exe_file.GetFilename().AsCString(""));
    }
    return error;
}

Status HostProcessPosix::GetMainModule(FileSpec &file_spec) const {
  Status error;

  // Use special code here because proc/[pid]/exe is a symbolic link.
  char link_path[PATH_MAX];
  if (snprintf(link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", m_process) != 1) {
    error.SetErrorString("Unable to build /proc/<pid>/exe string");
    return error;
  }

  error = FileSystem::Instance().Readlink(FileSpec(link_path), file_spec);
  if (!error.Success())
    return error;

  // If the binary has been deleted, the link name has " (deleted)" appended.
  // Remove if there.
  if (file_spec.GetFilename().GetStringRef().endswith(" (deleted)")) {
    const char *filename = file_spec.GetFilename().GetCString();
    static const size_t deleted_len = strlen(" (deleted)");
    const size_t len = file_spec.GetFilename().GetLength();
    file_spec.GetFilename().SetCStringWithLength(filename, len - deleted_len);
  }
  return error;
}

FileSpec::EnumerateDirectoryResult
PlatformDarwinKernel::GetKernelsInDirectory (void *baton,
                                           FileSpec::FileType file_type,
                                           const FileSpec &file_spec)
{
    if (file_type == FileSpec::eFileTypeRegular || file_type == FileSpec::eFileTypeSymbolicLink)
    {
        ConstString filename = file_spec.GetFilename();
        if (strncmp (filename.GetCString(), "kernel", 6) == 0
            || strncmp (filename.GetCString(), "mach", 4) == 0)
        {
            // This is m_kernel_binaries but we're in a class method here
            ((std::vector<lldb_private::FileSpec> *)baton)->push_back(file_spec);
        }
    }
    return FileSpec::eEnumerateDirectoryResultNext;
}

Error
ModuleCache::Put (const FileSpec &root_dir_spec,
                  const char *hostname,
                  const ModuleSpec &module_spec,
                  const FileSpec &tmp_file,
                  const FileSpec &target_file)
{
    const auto module_spec_dir = GetModuleDirectory (root_dir_spec, module_spec.GetUUID ());
    const auto module_file_path = JoinPath (module_spec_dir, target_file.GetFilename ().AsCString ());

    const auto tmp_file_path = tmp_file.GetPath ();
    const auto err_code = llvm::sys::fs::rename (tmp_file_path.c_str (), module_file_path.GetPath ().c_str ());
    if (err_code)
        return Error ("Failed to rename file %s to %s: %s",
                      tmp_file_path.c_str (), module_file_path.GetPath ().c_str (), err_code.message ().c_str ());

    const auto error = CreateHostSysRootModuleLink(root_dir_spec, hostname, target_file, module_file_path);
    if (error.Fail ())
        return Error ("Failed to create link to %s: %s", module_file_path.GetPath ().c_str (), error.AsCString ());
    return Error ();
}

uint32_t
Module::ResolveSymbolContextsForFileSpec (const FileSpec &file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
{
    Mutex::Locker locker (m_mutex);
    Timer scoped_timer(__PRETTY_FUNCTION__,
                       "Module::ResolveSymbolContextForFilePath (%s%s%s:%u, check_inlines = %s, resolve_scope = 0x%8.8x)",
                       file_spec.GetDirectory().AsCString(""),
                       file_spec.GetDirectory() ? "/" : "",
                       file_spec.GetFilename().AsCString(""),
                       line,
                       check_inlines ? "yes" : "no",
                       resolve_scope);

    const uint32_t initial_count = sc_list.GetSize();

    SymbolVendor *symbols = GetSymbolVendor  ();
    if (symbols)
        symbols->ResolveSymbolContext (file_spec, line, check_inlines, resolve_scope, sc_list);

    return sc_list.GetSize() - initial_count;
}

OperatingSystemPython::OperatingSystemPython(lldb_private::Process *process,
                                             const FileSpec &python_module_path)
    : OperatingSystem(process), m_thread_list_valobj_sp(), m_register_info_ap(),
      m_interpreter(NULL), m_python_object_sp() {
  if (!process)
    return;
  TargetSP target_sp = process->CalculateTarget();
  if (!target_sp)
    return;
  m_interpreter =
      target_sp->GetDebugger().GetCommandInterpreter().GetScriptInterpreter();
  if (m_interpreter) {

    std::string os_plugin_class_name(
        python_module_path.GetFilename().AsCString(""));
    if (!os_plugin_class_name.empty()) {
      const bool init_session = false;
      const bool allow_reload = true;
      char python_module_path_cstr[PATH_MAX];
      python_module_path.GetPath(python_module_path_cstr,
                                 sizeof(python_module_path_cstr));
      Error error;
      if (m_interpreter->LoadScriptingModule(
              python_module_path_cstr, allow_reload, init_session, error)) {
        // Strip the ".py" extension if there is one
        size_t py_extension_pos = os_plugin_class_name.rfind(".py");
        if (py_extension_pos != std::string::npos)
          os_plugin_class_name.erase(py_extension_pos);
        // Add ".OperatingSystemPlugIn" to the module name to get a string like
        // "modulename.OperatingSystemPlugIn"
        os_plugin_class_name += ".OperatingSystemPlugIn";
        StructuredData::ObjectSP object_sp =
            m_interpreter->OSPlugin_CreatePluginObject(
                os_plugin_class_name.c_str(), process->CalculateProcess());
        if (object_sp && object_sp->IsValid())
          m_python_object_sp = object_sp;
      }
    }
  }
}

static FileSpec::EnumerateDirectoryResult
RecurseCopy_Callback (void *baton,
                      FileSpec::FileType file_type,
                      const FileSpec &src)
{
    RecurseCopyBaton* rc_baton = (RecurseCopyBaton*)baton;
    switch (file_type)
    {
        case FileSpec::eFileTypePipe:
        case FileSpec::eFileTypeSocket:
            // we have no way to copy pipes and sockets - ignore them and continue
            return FileSpec::eEnumerateDirectoryResultNext;
            break;
            
        case FileSpec::eFileTypeDirectory:
            {
                // make the new directory and get in there
                FileSpec dst_dir = rc_baton->dst;
                if (!dst_dir.GetFilename())
                    dst_dir.GetFilename() = src.GetLastPathComponent();
                std::string dst_dir_path (dst_dir.GetPath());
                Error error = rc_baton->platform_ptr->MakeDirectory(dst_dir_path.c_str(), lldb::eFilePermissionsDirectoryDefault);
                if (error.Fail())
                {
                    rc_baton->error.SetErrorStringWithFormat("unable to setup directory %s on remote end", dst_dir_path.c_str());
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                }
                
                // now recurse
                std::string src_dir_path (src.GetPath());
                
                // Make a filespec that only fills in the directory of a FileSpec so
                // when we enumerate we can quickly fill in the filename for dst copies
                FileSpec recurse_dst;
                recurse_dst.GetDirectory().SetCString(dst_dir.GetPath().c_str());
                RecurseCopyBaton rc_baton2 = { recurse_dst, rc_baton->platform_ptr, Error() };
                FileSpec::EnumerateDirectory(src_dir_path.c_str(), true, true, true, RecurseCopy_Callback, &rc_baton2);
                if (rc_baton2.error.Fail())
                {
                    rc_baton->error.SetErrorString(rc_baton2.error.AsCString());
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                }
                return FileSpec::eEnumerateDirectoryResultNext;
            }
            break;
            
        case FileSpec::eFileTypeSymbolicLink:
            {
                // copy the file and keep going
                FileSpec dst_file = rc_baton->dst;
                if (!dst_file.GetFilename())
                    dst_file.GetFilename() = src.GetFilename();
                
                char buf[PATH_MAX];
                
                rc_baton->error = Host::Readlink (src.GetPath().c_str(), buf, sizeof(buf));

                if (rc_baton->error.Fail())
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                
                rc_baton->error = rc_baton->platform_ptr->CreateSymlink(dst_file.GetPath().c_str(), buf);

                if (rc_baton->error.Fail())
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out

                return FileSpec::eEnumerateDirectoryResultNext;
            }
            break;
        case FileSpec::eFileTypeRegular:
            {
                // copy the file and keep going
                FileSpec dst_file = rc_baton->dst;
                if (!dst_file.GetFilename())
                    dst_file.GetFilename() = src.GetFilename();
                Error err = rc_baton->platform_ptr->PutFile(src, dst_file);
                if (err.Fail())
                {
                    rc_baton->error.SetErrorString(err.AsCString());
                    return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
                }
                return FileSpec::eEnumerateDirectoryResultNext;
            }
            break;
            
        case FileSpec::eFileTypeInvalid:
        case FileSpec::eFileTypeOther:
        case FileSpec::eFileTypeUnknown:
            rc_baton->error.SetErrorStringWithFormat("invalid file detected during copy: %s", src.GetPath().c_str());
            return FileSpec::eEnumerateDirectoryResultQuit; // got an error, bail out
            break;
    }
}

static bool
SkinnyMachOFileContainsArchAndUUID
(
    const FileSpec &file_spec,
    const ArchSpec *arch,
    const lldb_private::UUID *uuid,   // the UUID we are looking for
    off_t file_offset,
    DataExtractor& data,
    uint32_t data_offset,
    const uint32_t magic
)
{
    assert(magic == HeaderMagic32 || magic == HeaderMagic32Swapped || magic == HeaderMagic64 || magic == HeaderMagic64Swapped);
    if (magic == HeaderMagic32 || magic == HeaderMagic64)
        data.SetByteOrder (lldb::endian::InlHostByteOrder());
    else if (lldb::endian::InlHostByteOrder() == eByteOrderBig)
        data.SetByteOrder (eByteOrderLittle);
    else
        data.SetByteOrder (eByteOrderBig);

    uint32_t i;
    const uint32_t cputype      = data.GetU32(&data_offset);    // cpu specifier
    const uint32_t cpusubtype   = data.GetU32(&data_offset);    // machine specifier
    data_offset+=4; // Skip mach file type
    const uint32_t ncmds        = data.GetU32(&data_offset);    // number of load commands
    const uint32_t sizeofcmds   = data.GetU32(&data_offset);    // the size of all the load commands
    data_offset+=4; // Skip flags

    // Check the architecture if we have a valid arch pointer
    if (arch)
    {
        ArchSpec file_arch(eArchTypeMachO, cputype, cpusubtype);

        if (file_arch != *arch)
            return false;
    }

    // The file exists, and if a valid arch pointer was passed in we know
    // if already matches, so we can return if we aren't looking for a specific
    // UUID
    if (uuid == NULL)
        return true;

    if (magic == HeaderMagic64Swapped || magic == HeaderMagic64)
        data_offset += 4;   // Skip reserved field for in mach_header_64

    // Make sure we have enough data for all the load commands
    if (magic == HeaderMagic64Swapped || magic == HeaderMagic64)
    {
        if (data.GetByteSize() < sizeof(struct mach_header_64) + sizeofcmds)
        {
            DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, sizeof(struct mach_header_64) + sizeofcmds));
            data.SetData (data_buffer_sp);
        }
    }
    else
    {
        if (data.GetByteSize() < sizeof(struct mach_header) + sizeofcmds)
        {
            DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, sizeof(struct mach_header) + sizeofcmds));
            data.SetData (data_buffer_sp);
        }
    }

    for (i=0; i<ncmds; i++)
    {
        const uint32_t cmd_offset = data_offset;    // Save this data_offset in case parsing of the segment goes awry!
        uint32_t cmd        = data.GetU32(&data_offset);
        uint32_t cmd_size   = data.GetU32(&data_offset);
        if (cmd == LoadCommandUUID)
        {
            lldb_private::UUID file_uuid (data.GetData(&data_offset, 16), 16);
            if (file_uuid == *uuid)
                return true;

            // Emit some warning messages since the UUIDs do not match!
            char path_buf[PATH_MAX];
            path_buf[0] = '\0';
            const char *path = file_spec.GetPath(path_buf, PATH_MAX) ? path_buf
                                                                     : file_spec.GetFilename().AsCString();
            Host::SystemLog (Host::eSystemLogWarning, 
                             "warning: UUID mismatch detected between binary and:\n\t'%s'\n", 
                             path);
            return false;
        }
        data_offset = cmd_offset + cmd_size;
    }
    return false;
}

SourceManager::File::File(const FileSpec &file_spec, Target *target) :
    m_file_spec_orig (file_spec),
    m_file_spec(file_spec),
    m_mod_time (file_spec.GetModificationTime()),
    m_data_sp(),
    m_offsets()
{
    if (!m_mod_time.IsValid())
    {
        if (target)
        {
            if (!file_spec.GetDirectory() && file_spec.GetFilename())
            {
                // If this is just a file name, lets see if we can find it in the target:
                bool check_inlines = false;
                SymbolContextList sc_list;
                size_t num_matches = target->GetImages().ResolveSymbolContextForFilePath (file_spec.GetFilename().AsCString(),
                                                                                          0,
                                                                                          check_inlines,
                                                                                          lldb::eSymbolContextModule | lldb::eSymbolContextCompUnit,
                                                                                          sc_list);
                bool got_multiple = false;
                if (num_matches != 0)
                {
                    if (num_matches > 1)
                    {
                        SymbolContext sc;
                        FileSpec *test_cu_spec = NULL;

                        for (unsigned i = 0; i < num_matches; i++)
                        {
                            sc_list.GetContextAtIndex(i, sc);
                            if (sc.comp_unit)
                            {
                                if (test_cu_spec)
                                {
                                    if (test_cu_spec != static_cast<FileSpec *> (sc.comp_unit))
                                        got_multiple = true;
                                        break;
                                }
                                else
                                    test_cu_spec = sc.comp_unit;
                            }
                        }
                    }
                    if (!got_multiple)
                    {
                        SymbolContext sc;
                        sc_list.GetContextAtIndex (0, sc);
                        m_file_spec = sc.comp_unit;
                        m_mod_time = m_file_spec.GetModificationTime();
                    }
                }
            }
            // Try remapping if m_file_spec does not correspond to an existing file.
            if (!m_file_spec.Exists())
            {
                FileSpec new_file_spec;
                // Check target specific source remappings first, then fall back to
                // modules objects can have individual path remappings that were detected
                // when the debug info for a module was found.
                // then
                if (target->GetSourcePathMap().FindFile (m_file_spec, new_file_spec) ||
                    target->GetImages().FindSourceFile (m_file_spec, new_file_spec))
                {
                    m_file_spec = new_file_spec;
                    m_mod_time = m_file_spec.GetModificationTime();
                }
            }
        }
    }
    
    if (m_mod_time.IsValid())
        m_data_sp = m_file_spec.ReadFileContents ();
}