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// 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 <fdio/io.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/fuchsia/scoped_zx_handle.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;
library_path.GetComponents(&components);
if (components.size() != 1u) {
NOTREACHED() << "library_path is a path, should be a filename: "
<< library_path.MaybeAsASCII();
return nullptr;
}
// Fuchsia libraries must live under the "lib" directory, which may be located
// in /system/lib or /pkg/lib depending on whether the executable is running
// inside a package.
// TODO(https://crbug.com/805057): Remove the non-package codepath when bootfs
// is deprecated.
FilePath computed_path = base::GetPackageRoot();
if (computed_path.empty()) {
CHECK(PathService::Get(DIR_EXE, &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",
base::File::ErrorToString(library.error_details()).c_str());
}
return nullptr;
}
base::ScopedZxHandle vmo;
zx_status_t status =
fdio_get_vmo_clone(library.GetPlatformFile(), vmo.receive());
if (status != ZX_OK) {
if (error) {
error->message = base::StringPrintf("fdio_get_vmo_clone: %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 base::StringPrintf("lib%s.so", name.as_string().c_str());
}
std::string GetLoadableModuleName(StringPiece name) {
return GetNativeLibraryName(name);
}
} // namespace base
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