1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#pragma once
30
31#include <android/api-level.h>
32
33#include <stdlib.h>
34#include <limits.h>
35#include "private/bionic_macros.h"
36
37#include <memory>
38#include <string>
39#include <vector>
40#include <unordered_map>
41
42class NamespaceLinkConfig {
43 public:
44  NamespaceLinkConfig() = default;
45  NamespaceLinkConfig(const std::string& ns_name, const std::string& shared_libs,
46                      bool allow_all_shared_libs)
47      : ns_name_(ns_name), shared_libs_(shared_libs),
48        allow_all_shared_libs_(allow_all_shared_libs) {}
49
50  const std::string& ns_name() const {
51    return ns_name_;
52  }
53
54  const std::string& shared_libs() const {
55    return shared_libs_;
56  }
57
58  bool allow_all_shared_libs() const {
59    return allow_all_shared_libs_;
60  }
61
62 private:
63  std::string ns_name_;
64  std::string shared_libs_;
65  bool allow_all_shared_libs_;
66};
67
68class NamespaceConfig {
69 public:
70  explicit NamespaceConfig(const std::string& name)
71      : name_(name), isolated_(false), visible_(false)
72  {}
73
74  const char* name() const {
75    return name_.c_str();
76  }
77
78  bool isolated() const {
79    return isolated_;
80  }
81
82  bool visible() const {
83    return visible_;
84  }
85
86  const std::vector<std::string>& search_paths() const {
87    return search_paths_;
88  }
89
90  const std::vector<std::string>& permitted_paths() const {
91    return permitted_paths_;
92  }
93
94  const std::vector<NamespaceLinkConfig>& links() const {
95    return namespace_links_;
96  }
97
98  void add_namespace_link(const std::string& ns_name, const std::string& shared_libs,
99                          bool allow_all_shared_libs) {
100    namespace_links_.push_back(NamespaceLinkConfig(ns_name, shared_libs, allow_all_shared_libs));
101  }
102
103  void set_isolated(bool isolated) {
104    isolated_ = isolated;
105  }
106
107  void set_visible(bool visible) {
108    visible_ = visible;
109  }
110
111  void set_search_paths(std::vector<std::string>&& search_paths) {
112    search_paths_ = search_paths;
113  }
114
115  void set_permitted_paths(std::vector<std::string>&& permitted_paths) {
116    permitted_paths_ = permitted_paths;
117  }
118 private:
119  const std::string name_;
120  bool isolated_;
121  bool visible_;
122  std::vector<std::string> search_paths_;
123  std::vector<std::string> permitted_paths_;
124  std::vector<NamespaceLinkConfig> namespace_links_;
125
126  DISALLOW_IMPLICIT_CONSTRUCTORS(NamespaceConfig);
127};
128
129class Config {
130 public:
131  Config() : target_sdk_version_(__ANDROID_API__) {}
132
133  const std::vector<std::unique_ptr<NamespaceConfig>>& namespace_configs() const {
134    return namespace_configs_;
135  }
136
137  const NamespaceConfig* default_namespace_config() const {
138    auto it = namespace_configs_map_.find("default");
139    return it == namespace_configs_map_.end() ? nullptr : it->second;
140  }
141
142  uint32_t target_sdk_version() const {
143    return target_sdk_version_;
144  }
145
146  // note that this is one time event and therefore there is no need to
147  // read every section of the config. Every linker instance needs at
148  // most one configuration.
149  // Returns false in case of an error. If binary config was not found
150  // sets *config = nullptr.
151  static bool read_binary_config(const char* ld_config_file_path,
152                                 const char* binary_realpath,
153                                 bool is_asan,
154                                 const Config** config,
155                                 std::string* error_msg);
156
157  static std::string get_vndk_version_string(const char delimiter);
158 private:
159  void clear();
160
161  void set_target_sdk_version(uint32_t target_sdk_version) {
162    target_sdk_version_ = target_sdk_version;
163  }
164
165  NamespaceConfig* create_namespace_config(const std::string& name);
166
167  std::vector<std::unique_ptr<NamespaceConfig>> namespace_configs_;
168  std::unordered_map<std::string, NamespaceConfig*> namespace_configs_map_;
169  uint32_t target_sdk_version_;
170
171  DISALLOW_COPY_AND_ASSIGN(Config);
172};
173