1 //===-- PluginLoader.cpp - Implement -load command line option ------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file was developed by the LLVM research group and is distributed under 6 // the University of Illinois Open Source License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the -load <plugin> command line option handler. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #define DONT_GET_PLUGIN_LOADER_OPTION 15 #include "llvm/Support/PluginLoader.h" 16 #include "llvm/System/DynamicLibrary.h" 17 #include <iostream> 18 #include <vector> 19 20 using namespace llvm; 21 22 static std::vector<std::string>* plugins; 23 24 void PluginLoader::operator=(const std::string &Filename) { 25 std::string ErrorMessage; 26 27 if (!plugins) 28 plugins = new std::vector<std::string>(); 29 30 try { 31 sys::DynamicLibrary::LoadLibraryPermanently(Filename.c_str()); 32 plugins->push_back(Filename); 33 } catch (const std::string& errmsg) { 34 if (errmsg.empty()) { 35 ErrorMessage = "Unknown"; 36 } else { 37 ErrorMessage = errmsg; 38 } 39 } 40 if (!ErrorMessage.empty()) 41 std::cerr << "Error opening '" << Filename << "': " << ErrorMessage 42 << "\n -load request ignored.\n"; 43 } 44 45 unsigned PluginLoader::getNumPlugins() 46 { 47 if(plugins) 48 return plugins->size(); 49 else 50 return 0; 51 } 52 53 std::string& PluginLoader::getPlugin(unsigned num) 54 { 55 assert(plugins && num < plugins->size() && "Asking for an out of bounds plugin"); 56 return (*plugins)[num]; 57 } 58