| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/native_library.h" |
| |
| #include <fcntl.h> |
| #include <fuchsia/io/cpp/fidl.h> |
| #include <lib/fdio/directory.h> |
| #include <lib/fdio/io.h> |
| #include <lib/zx/vmo.h> |
| #include <stdio.h> |
| #include <zircon/dlfcn.h> |
| #include <zircon/status.h> |
| #include <zircon/syscalls.h> |
| |
| #include "base/base_paths_fuchsia.h" |
| #include "base/files/file.h" |
| #include "base/files/file_path.h" |
| #include "base/fuchsia/fuchsia_logging.h" |
| #include "base/notreached.h" |
| #include "base/path_service.h" |
| #include "base/posix/safe_strerror.h" |
| #include "base/strings/strcat.h" |
| #include "base/strings/string_piece.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/threading/thread_restrictions.h" |
| |
| namespace base { |
| |
| std::string NativeLibraryLoadError::ToString() const { |
| return message; |
| } |
| |
| NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path, |
| const NativeLibraryOptions& options, |
| NativeLibraryLoadError* error) { |
| std::vector<base::FilePath::StringType> components; |
| library_path.GetComponents(&components); |
| if (components.size() != 1u) { |
| NOTREACHED() << "library_path is a path, should be a filename: " |
| << library_path.MaybeAsASCII(); |
| return nullptr; |
| } |
| |
| FilePath computed_path; |
| base::PathService::Get(DIR_SOURCE_ROOT, &computed_path); |
| computed_path = computed_path.AppendASCII("lib").Append(components[0]); |
| |
| // Use fdio_open_fd (a Fuchsia-specific API) here so we can pass the |
| // appropriate FS rights flags to request executability. |
| // TODO(1018538): Teach base::File about FLAG_EXECUTE on Fuchsia, and then |
| // use it here instead of using fdio_open_fd() directly. |
| base::ScopedFD fd; |
| zx_status_t status = fdio_open_fd( |
| computed_path.value().c_str(), |
| fuchsia::io::OPEN_RIGHT_READABLE | fuchsia::io::OPEN_RIGHT_EXECUTABLE, |
| base::ScopedFD::Receiver(fd).get()); |
| if (status != ZX_OK) { |
| if (error) { |
| error->message = |
| base::StringPrintf("fdio_open_fd: %s", zx_status_get_string(status)); |
| } |
| return nullptr; |
| } |
| |
| zx::vmo vmo; |
| status = fdio_get_vmo_exec(fd.get(), vmo.reset_and_get_address()); |
| if (status != ZX_OK) { |
| if (error) { |
| error->message = base::StringPrintf("fdio_get_vmo_exec: %s", |
| zx_status_get_string(status)); |
| } |
| return nullptr; |
| } |
| |
| NativeLibrary result = dlopen_vmo(vmo.get(), RTLD_LAZY | RTLD_LOCAL); |
| return result; |
| } |
| |
| void UnloadNativeLibrary(NativeLibrary library) { |
| // dlclose() is a no-op on Fuchsia, so do nothing here. |
| } |
| |
| void* GetFunctionPointerFromNativeLibrary(NativeLibrary library, |
| StringPiece name) { |
| return dlsym(library, name.data()); |
| } |
| |
| std::string GetNativeLibraryName(StringPiece name) { |
| return StrCat({"lib", name, ".so"}); |
| } |
| |
| std::string GetLoadableModuleName(StringPiece name) { |
| return GetNativeLibraryName(name); |
| } |
| |
| } // namespace base |