1 /* 2 * Copyright (C) 2016 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 "linker_common_types.h" 32 33 #include <string> 34 #include <vector> 35 #include <unordered_set> 36 37 struct android_namespace_t; 38 39 struct android_namespace_link_t { 40 public: 41 android_namespace_link_t(android_namespace_t* linked_namespace, 42 const std::unordered_set<std::string>& shared_lib_sonames, 43 bool allow_all_shared_libs) 44 : linked_namespace_(linked_namespace), shared_lib_sonames_(shared_lib_sonames), 45 allow_all_shared_libs_(allow_all_shared_libs) 46 {} 47 48 android_namespace_t* linked_namespace() const { 49 return linked_namespace_; 50 } 51 52 const std::unordered_set<std::string>& shared_lib_sonames() const { 53 return shared_lib_sonames_; 54 } 55 56 bool is_accessible(const char* soname) const { 57 if (soname == nullptr) { 58 return false; 59 } 60 return allow_all_shared_libs_ || shared_lib_sonames_.find(soname) != shared_lib_sonames_.end(); 61 } 62 63 bool allow_all_shared_libs() const { 64 return allow_all_shared_libs_; 65 } 66 67 private: 68 android_namespace_t* const linked_namespace_; 69 const std::unordered_set<std::string> shared_lib_sonames_; 70 bool allow_all_shared_libs_; 71 }; 72 73 struct android_namespace_t { 74 public: 75 android_namespace_t() : name_(nullptr), is_isolated_(false), is_greylist_enabled_(false) {} 76 77 const char* get_name() const { return name_; } 78 void set_name(const char* name) { name_ = name; } 79 80 bool is_isolated() const { return is_isolated_; } 81 void set_isolated(bool isolated) { is_isolated_ = isolated; } 82 83 bool is_greylist_enabled() const { return is_greylist_enabled_; } 84 void set_greylist_enabled(bool enabled) { is_greylist_enabled_ = enabled; } 85 86 const std::vector<std::string>& get_ld_library_paths() const { 87 return ld_library_paths_; 88 } 89 void set_ld_library_paths(std::vector<std::string>&& library_paths) { 90 ld_library_paths_ = library_paths; 91 } 92 93 const std::vector<std::string>& get_default_library_paths() const { 94 return default_library_paths_; 95 } 96 void set_default_library_paths(std::vector<std::string>&& library_paths) { 97 default_library_paths_ = library_paths; 98 } 99 void set_default_library_paths(const std::vector<std::string>& library_paths) { 100 default_library_paths_ = library_paths; 101 } 102 103 const std::vector<std::string>& get_permitted_paths() const { 104 return permitted_paths_; 105 } 106 void set_permitted_paths(std::vector<std::string>&& permitted_paths) { 107 permitted_paths_ = permitted_paths; 108 } 109 void set_permitted_paths(const std::vector<std::string>& permitted_paths) { 110 permitted_paths_ = permitted_paths; 111 } 112 113 const std::vector<android_namespace_link_t>& linked_namespaces() const { 114 return linked_namespaces_; 115 } 116 void add_linked_namespace(android_namespace_t* linked_namespace, 117 const std::unordered_set<std::string>& shared_lib_sonames, 118 bool allow_all_shared_libs) { 119 linked_namespaces_.push_back( 120 android_namespace_link_t(linked_namespace, shared_lib_sonames, allow_all_shared_libs)); 121 } 122 123 void add_soinfo(soinfo* si) { 124 soinfo_list_.push_back(si); 125 } 126 127 void add_soinfos(const soinfo_list_t& soinfos) { 128 for (auto si : soinfos) { 129 add_soinfo(si); 130 } 131 } 132 133 void remove_soinfo(soinfo* si) { 134 soinfo_list_.remove_if([&](soinfo* candidate) { 135 return si == candidate; 136 }); 137 } 138 139 const soinfo_list_t& soinfo_list() const { return soinfo_list_; } 140 141 // For isolated namespaces - checks if the file is on the search path; 142 // always returns true for not isolated namespace. 143 bool is_accessible(const std::string& path); 144 145 // Returns true if si is accessible from this namespace. A soinfo 146 // is considered accessible when it belongs to this namespace 147 // or one of it's parent soinfos belongs to this namespace. 148 bool is_accessible(soinfo* si); 149 150 soinfo_list_t get_global_group(); 151 soinfo_list_t get_shared_group(); 152 153 private: 154 const char* name_; 155 bool is_isolated_; 156 bool is_greylist_enabled_; 157 std::vector<std::string> ld_library_paths_; 158 std::vector<std::string> default_library_paths_; 159 std::vector<std::string> permitted_paths_; 160 // Loader looks into linked namespace if it was not able 161 // to find a library in this namespace. Note that library 162 // lookup in linked namespaces are limited by the list of 163 // shared sonames. 164 std::vector<android_namespace_link_t> linked_namespaces_; 165 soinfo_list_t soinfo_list_; 166 167 DISALLOW_COPY_AND_ASSIGN(android_namespace_t); 168 }; 169
