1 //===-- PluginLoader.cpp - Implement -load command line option ------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // 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/Support/DynamicLibrary.h"
17 #include "llvm/Support/ManagedStatic.h"
18 #include "llvm/Support/Mutex.h"
19 #include "llvm/Support/raw_ostream.h"
20 #include <vector>
21 using namespace llvm;
22 
23 static ManagedStatic<std::vector<std::string> > Plugins;
24 static ManagedStatic<sys::SmartMutex<true> > PluginsLock;
25 
operator =(const std::string & Filename)26 void PluginLoader::operator=(const std::string &Filename) {
27   sys::SmartScopedLock<true> Lock(*PluginsLock);
28   std::string Error;
29   if (sys::DynamicLibrary::LoadLibraryPermanently(Filename.c_str(), &Error)) {
30     errs() << "Error opening '" << Filename << "': " << Error
31            << "\n  -load request ignored.\n";
32   } else {
33     Plugins->push_back(Filename);
34   }
35 }
36 
getNumPlugins()37 unsigned PluginLoader::getNumPlugins() {
38   sys::SmartScopedLock<true> Lock(*PluginsLock);
39   return Plugins.isConstructed() ? Plugins->size() : 0;
40 }
41 
getPlugin(unsigned num)42 std::string &PluginLoader::getPlugin(unsigned num) {
43   sys::SmartScopedLock<true> Lock(*PluginsLock);
44   assert(Plugins.isConstructed() && num < Plugins->size() &&
45          "Asking for an out of bounds plugin");
46   return (*Plugins)[num];
47 }
48