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