1 /** 2 * Orthanc - A Lightweight, RESTful DICOM Store 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics 4 * Department, University Hospital of Liege, Belgium 5 * Copyright (C) 2017-2021 Osimis S.A., Belgium 6 * 7 * This program is free software: you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public License 9 * as published by the Free Software Foundation, either version 3 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this program. If not, see 19 * <http://www.gnu.org/licenses/>. 20 **/ 21 22 23 #include "PrecompiledHeaders.h" 24 #include "SharedLibrary.h" 25 26 #include "Logging.h" 27 #include "OrthancException.h" 28 29 #include <boost/filesystem.hpp> 30 31 #if defined(_WIN32) 32 #include <windows.h> 33 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 34 #include <dlfcn.h> 35 #else 36 #error Support your platform here 37 #endif 38 39 namespace Orthanc 40 { SharedLibrary(const std::string & path)41 SharedLibrary::SharedLibrary(const std::string& path) : 42 path_(path), 43 handle_(NULL) 44 { 45 #if defined(_WIN32) 46 handle_ = ::LoadLibraryA(path_.c_str()); 47 if (handle_ == NULL) 48 { 49 LOG(ERROR) << "LoadLibrary(" << path_ << ") failed: Error " << ::GetLastError(); 50 51 if (::GetLastError() == ERROR_BAD_EXE_FORMAT && 52 sizeof(void*) == 4) 53 { 54 throw OrthancException(ErrorCode_SharedLibrary, 55 "You are most probably trying to load a 64bit plugin into a 32bit version of Orthanc"); 56 } 57 else if (::GetLastError() == ERROR_BAD_EXE_FORMAT && 58 sizeof(void*) == 8) 59 { 60 throw OrthancException(ErrorCode_SharedLibrary, 61 "You are most probably trying to load a 32bit plugin into a 64bit version of Orthanc"); 62 } 63 else 64 { 65 throw OrthancException(ErrorCode_SharedLibrary); 66 } 67 } 68 69 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 70 71 /** 72 * "RTLD_LOCAL" is the default, and is only present to be 73 * explicit. "RTLD_DEEPBIND" was added in Orthanc 1.6.0, in order 74 * to avoid crashes while loading plugins from the LSB binaries of 75 * the Orthanc core. 76 * 77 * BUT this had no effect, and this results in a crash if loading 78 * the Python 2.7 plugin => We disabled it again in Orthanc 1.6.1. 79 **/ 80 81 #if 0 // && defined(RTLD_DEEPBIND) // This is a GNU extension 82 // Disabled in Orthanc 1.6.1 83 handle_ = ::dlopen(path_.c_str(), RTLD_NOW | RTLD_LOCAL | RTLD_DEEPBIND); 84 #else 85 handle_ = ::dlopen(path_.c_str(), RTLD_NOW | RTLD_LOCAL); 86 #endif 87 88 if (handle_ == NULL) 89 { 90 std::string explanation; 91 const char *tmp = ::dlerror(); 92 if (tmp) 93 { 94 explanation = ": Error " + std::string(tmp); 95 } 96 97 LOG(ERROR) << "dlopen(" << path_ << ") failed" << explanation; 98 throw OrthancException(ErrorCode_SharedLibrary); 99 } 100 101 #else 102 #error Support your platform here 103 #endif 104 } 105 ~SharedLibrary()106 SharedLibrary::~SharedLibrary() 107 { 108 if (handle_) 109 { 110 #if defined(_WIN32) 111 ::FreeLibrary((HMODULE)handle_); 112 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 113 ::dlclose(handle_); 114 #else 115 #error Support your platform here 116 #endif 117 } 118 } 119 120 GetPath() const121 const std::string &SharedLibrary::GetPath() const 122 { 123 return path_; 124 } 125 126 GetFunctionInternal(const std::string & name)127 SharedLibrary::FunctionPointer SharedLibrary::GetFunctionInternal(const std::string& name) 128 { 129 if (!handle_) 130 { 131 throw OrthancException(ErrorCode_InternalError); 132 } 133 134 #if defined(_WIN32) 135 return ::GetProcAddress((HMODULE)handle_, name.c_str()); 136 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 137 return ::dlsym(handle_, name.c_str()); 138 #else 139 #error Support your platform here 140 #endif 141 } 142 143 GetFunction(const std::string & name)144 SharedLibrary::FunctionPointer SharedLibrary::GetFunction(const std::string& name) 145 { 146 SharedLibrary::FunctionPointer result = GetFunctionInternal(name); 147 148 if (result == NULL) 149 { 150 throw OrthancException( 151 ErrorCode_SharedLibrary, 152 "Shared library does not expose function \"" + name + "\""); 153 } 154 else 155 { 156 return result; 157 } 158 } 159 160 HasFunction(const std::string & name)161 bool SharedLibrary::HasFunction(const std::string& name) 162 { 163 return GetFunctionInternal(name) != NULL; 164 } 165 } 166