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>
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 namespace
34
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: 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
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