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// Copyright 2018 The Chromium Authors
// 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.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"
#include "base_paths.h"
namespace base {
std::string NativeLibraryLoadError::ToString() const {
return message;
}
NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path,
const NativeLibraryOptions& options,
NativeLibraryLoadError* error) {
FilePath computed_path;
FilePath library_root_path =
base::PathService::CheckedGet(DIR_ASSETS).Append("lib");
if (library_path.IsAbsolute()) {
// See more info in fxbug.dev/105910.
if (!library_root_path.IsParent(library_path)) {
auto error_message =
base::StringPrintf("Absolute library paths must begin with %s",
library_root_path.value().c_str());
DLOG(ERROR) << error_message;
if (error) {
error->message = std::move(error_message);
}
return nullptr;
}
computed_path = library_path;
} else {
computed_path = library_root_path.Append(library_path);
}
// Use fdio_open_fd (a Fuchsia-specific API) here so we can pass the
// appropriate FS rights flags to request executability.
// TODO(crbug.com/1018538): Teach base::File about FLAG_WIN_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(),
static_cast<uint32_t>(fuchsia::io::OpenFlags::RIGHT_READABLE |
fuchsia::io::OpenFlags::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,
const char* name) {
return dlsym(library, name);
}
std::string GetNativeLibraryName(StringPiece name) {
return StrCat({"lib", name, ".so"});
}
std::string GetLoadableModuleName(StringPiece name) {
return GetNativeLibraryName(name);
}
} // namespace base
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