blob: ab3232786160ba032d21d37114ae70ed156606eb [file] [log] [blame]
// 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 <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/logging.h"
#include "base/path_service.h"
#include "base/posix/safe_strerror.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;
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]);
base::File library(computed_path,
base::File::FLAG_OPEN | base::File::FLAG_READ);
if (!library.IsValid()) {
if (error) {
error->message = base::StringPrintf(
"open library: %s",
return nullptr;
zx::vmo vmo;
zx_status_t status = fdio_get_vmo_clone(library.GetPlatformFile(),
if (status != ZX_OK) {
if (error) {
error->message = base::StringPrintf("fdio_get_vmo_clone: %s",
return nullptr;
// VMOs must be marked as exec-capable to be mapped executable in dlopen_vmo,
// and fdio_get_vmo_clone shouldn't be marking every VMO it returns
// exec-capable. So we should mark it as exec-capable here.
// In the fullness of time, this invalid handle should be swapped out for a
// ZX_RSRC_KIND_VMEX handle.
status = vmo.replace_as_executable(zx::handle(), &vmo);
if (status != ZX_OK) {
if (error) {
error->message = base::StringPrintf("zx_vmo_replace_as_executable: %s",
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,;
std::string GetNativeLibraryName(StringPiece name) {
return base::StringPrintf("", name.as_string().c_str());
std::string GetLoadableModuleName(StringPiece name) {
return GetNativeLibraryName(name);
} // namespace base