59 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements the -load <plugin> command line option handler.10//11//===----------------------------------------------------------------------===//12 13#define DONT_GET_PLUGIN_LOADER_OPTION14#include "llvm/Support/PluginLoader.h"15#include "llvm/Support/DynamicLibrary.h"16#include "llvm/Support/Mutex.h"17#include "llvm/Support/raw_ostream.h"18#include <vector>19using namespace llvm;20 21namespace {22 23struct Plugins {24 sys::SmartMutex<true> Lock;25 std::vector<std::string> List;26};27 28Plugins &getPlugins() {29 static Plugins P;30 return P;31}32 33} // anonymous namespace34 35void PluginLoader::operator=(const std::string &Filename) {36 auto &P = getPlugins();37 sys::SmartScopedLock<true> Lock(P.Lock);38 std::string Error;39 if (sys::DynamicLibrary::LoadLibraryPermanently(Filename.c_str(), &Error)) {40 errs() << "Error opening '" << Filename << "': " << Error41 << "\n -load request ignored.\n";42 } else {43 P.List.push_back(Filename);44 }45}46 47unsigned PluginLoader::getNumPlugins() {48 auto &P = getPlugins();49 sys::SmartScopedLock<true> Lock(P.Lock);50 return P.List.size();51}52 53std::string &PluginLoader::getPlugin(unsigned num) {54 auto &P = getPlugins();55 sys::SmartScopedLock<true> Lock(P.Lock);56 assert(num < P.List.size() && "Asking for an out of bounds plugin");57 return P.List[num];58}59