| 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/Mutex.h" |
| 17 | #include "llvm/Support/raw_ostream.h" |
| 18 | #include <vector> |
| 19 | using namespace llvm; |
| 20 | |
| 21 | namespace { |
| 22 | |
| 23 | struct Plugins { |
| 24 | sys::SmartMutex<true> Lock; |
| 25 | std::vector<std::string> List; |
| 26 | }; |
| 27 | |
| 28 | Plugins &getPlugins() { |
| 29 | static Plugins P; |
| 30 | return P; |
| 31 | } |
| 32 | |
| 33 | } // anonymous namespace |
| 34 | |
| 35 | void 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: Filename.c_str(), ErrMsg: &Error)) { |
| 40 | errs() << "Error opening '"<< Filename << "': "<< Error |
| 41 | << "\n -load request ignored.\n"; |
| 42 | } else { |
| 43 | P.List.push_back(x: Filename); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | unsigned PluginLoader::getNumPlugins() { |
| 48 | auto &P = getPlugins(); |
| 49 | sys::SmartScopedLock<true> Lock(P.Lock); |
| 50 | return P.List.size(); |
| 51 | } |
| 52 | |
| 53 | std::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 |