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/*
* Copyright (C) 2017 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <android/api-level.h>
#include <stdlib.h>
#include <limits.h>
#include <memory>
#include <string>
#include <vector>
#include <unordered_map>
#include <android-base/macros.h>
#if defined(__LP64__)
static constexpr const char* kLibPath = "lib64";
#else
static constexpr const char* kLibPath = "lib";
#endif
class NamespaceLinkConfig {
public:
NamespaceLinkConfig() = default;
NamespaceLinkConfig(const std::string& ns_name, const std::string& shared_libs,
bool allow_all_shared_libs)
: ns_name_(ns_name), shared_libs_(shared_libs),
allow_all_shared_libs_(allow_all_shared_libs) {}
const std::string& ns_name() const {
return ns_name_;
}
const std::string& shared_libs() const {
return shared_libs_;
}
bool allow_all_shared_libs() const {
return allow_all_shared_libs_;
}
private:
std::string ns_name_;
std::string shared_libs_;
bool allow_all_shared_libs_;
};
class NamespaceConfig {
public:
explicit NamespaceConfig(const std::string& name)
: name_(name), isolated_(false), visible_(false)
{}
const char* name() const {
return name_.c_str();
}
bool isolated() const {
return isolated_;
}
bool visible() const {
return visible_;
}
const std::vector<std::string>& search_paths() const {
return search_paths_;
}
const std::vector<std::string>& permitted_paths() const {
return permitted_paths_;
}
const std::vector<std::string>& whitelisted_libs() const {
return whitelisted_libs_;
}
const std::vector<NamespaceLinkConfig>& links() const {
return namespace_links_;
}
void add_namespace_link(const std::string& ns_name, const std::string& shared_libs,
bool allow_all_shared_libs) {
namespace_links_.push_back(NamespaceLinkConfig(ns_name, shared_libs, allow_all_shared_libs));
}
void set_isolated(bool isolated) {
isolated_ = isolated;
}
void set_visible(bool visible) {
visible_ = visible;
}
void set_search_paths(std::vector<std::string>&& search_paths) {
search_paths_ = std::move(search_paths);
}
void set_permitted_paths(std::vector<std::string>&& permitted_paths) {
permitted_paths_ = std::move(permitted_paths);
}
void set_whitelisted_libs(std::vector<std::string>&& whitelisted_libs) {
whitelisted_libs_ = std::move(whitelisted_libs);
}
private:
const std::string name_;
bool isolated_;
bool visible_;
std::vector<std::string> search_paths_;
std::vector<std::string> permitted_paths_;
std::vector<std::string> whitelisted_libs_;
std::vector<NamespaceLinkConfig> namespace_links_;
DISALLOW_IMPLICIT_CONSTRUCTORS(NamespaceConfig);
};
class Config {
public:
Config() : target_sdk_version_(__ANDROID_API__) {}
const std::vector<std::unique_ptr<NamespaceConfig>>& namespace_configs() const {
return namespace_configs_;
}
const NamespaceConfig* default_namespace_config() const {
auto it = namespace_configs_map_.find("default");
return it == namespace_configs_map_.end() ? nullptr : it->second;
}
int target_sdk_version() const {
return target_sdk_version_;
}
// note that this is one time event and therefore there is no need to
// read every section of the config. Every linker instance needs at
// most one configuration.
// Returns false in case of an error. If binary config was not found
// sets *config = nullptr.
static bool read_binary_config(const char* ld_config_file_path,
const char* binary_realpath,
bool is_asan,
const Config** config,
std::string* error_msg);
static std::string get_vndk_version_string(const char delimiter);
private:
void clear();
void set_target_sdk_version(int target_sdk_version) {
target_sdk_version_ = target_sdk_version;
}
NamespaceConfig* create_namespace_config(const std::string& name);
std::vector<std::unique_ptr<NamespaceConfig>> namespace_configs_;
std::unordered_map<std::string, NamespaceConfig*> namespace_configs_map_;
int target_sdk_version_;
DISALLOW_COPY_AND_ASSIGN(Config);
};
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