1 //===-- PluginLoader.cpp - Implement -load command line option ------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the -load <plugin> command line option handler. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #define DONT_GET_PLUGIN_LOADER_OPTION 14 #include "llvm/Support/PluginLoader.h" 15 #include "llvm/Support/DynamicLibrary.h" 16 #include "llvm/Support/ManagedStatic.h" 17 #include "llvm/Support/Mutex.h" 18 #include "llvm/Support/raw_ostream.h" 19 #include <vector> 20 using namespace llvm; 21 22 static ManagedStatic<std::vector<std::string> > Plugins; 23 static ManagedStatic<sys::SmartMutex<true> > PluginsLock; 24 25 void PluginLoader::operator=(const std::string &Filename) { 26 sys::SmartScopedLock<true> Lock(*PluginsLock); 27 std::string Error; 28 if (sys::DynamicLibrary::LoadLibraryPermanently(Filename.c_str(), &Error)) { 29 errs() << "Error opening '" << Filename << "': " << Error 30 << "\n -load request ignored.\n"; 31 } else { 32 Plugins->push_back(Filename); 33 } 34 } 35 36 unsigned PluginLoader::getNumPlugins() { 37 sys::SmartScopedLock<true> Lock(*PluginsLock); 38 return Plugins.isConstructed() ? Plugins->size() : 0; 39 } 40 41 std::string &PluginLoader::getPlugin(unsigned num) { 42 sys::SmartScopedLock<true> Lock(*PluginsLock); 43 assert(Plugins.isConstructed() && num < Plugins->size() && 44 "Asking for an out of bounds plugin"); 45 return (*Plugins)[num]; 46 } 47