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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_LIBNATIVELOADER_NATIVE_LOADER_NAMESPACE_H_
#define ART_LIBNATIVELOADER_NATIVE_LOADER_NAMESPACE_H_
#if defined(ART_TARGET_ANDROID)
#include <string>
#include <variant>
#include <vector>
#include <android-base/logging.h>
#include <android-base/result.h>
#include <android/dlext.h>
#include <log/log.h>
#include <nativebridge/native_bridge.h>
namespace android {
using android::base::Result;
// NativeLoaderNamespace abstracts a linker namespace for the native
// architecture (ex: arm on arm) or the translated architecture (ex: arm on
// x86). Instances of this class are managed by LibraryNamespaces object.
struct NativeLoaderNamespace {
public:
static Result<NativeLoaderNamespace> Create(const std::string& name,
const std::string& search_paths,
const std::string& permitted_paths,
const NativeLoaderNamespace* parent, bool is_shared,
bool is_exempt_list_enabled,
bool also_used_as_anonymous);
NativeLoaderNamespace(NativeLoaderNamespace&&) = default;
NativeLoaderNamespace(const NativeLoaderNamespace&) = default;
NativeLoaderNamespace& operator=(const NativeLoaderNamespace&) = default;
android_namespace_t* ToRawAndroidNamespace() const { return std::get<0>(raw_); }
native_bridge_namespace_t* ToRawNativeBridgeNamespace() const { return std::get<1>(raw_); }
std::string name() const { return name_; }
bool IsBridged() const { return raw_.index() == 1; }
// Creates a link from this namespace to target for the ":"-separated list of
// libraries in shared_libs. If target is nullptr it creates a link to the
// default namespace.
Result<void> Link(const NativeLoaderNamespace* target, const std::string& shared_libs) const;
Result<void*> Load(const char* lib_name) const;
static Result<NativeLoaderNamespace> GetExportedNamespace(const std::string& name,
bool is_bridged);
static Result<NativeLoaderNamespace> GetSystemNamespace(bool is_bridged);
private:
explicit NativeLoaderNamespace(const std::string& name, android_namespace_t* ns)
: name_(name), raw_(ns) {}
explicit NativeLoaderNamespace(const std::string& name, native_bridge_namespace_t* ns)
: name_(name), raw_(ns) {}
std::string name_;
std::variant<android_namespace_t*, native_bridge_namespace_t*> raw_;
};
} // namespace android
#endif // #if defined(ART_TARGET_ANDROID)
#endif // ART_LIBNATIVELOADER_NATIVE_LOADER_NAMESPACE_H_
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