1 //===- lib/Passes/PassPluginLoader.cpp - Load Plugins for New PM Passes ---===// 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 #include "llvm/Passes/PassPlugin.h" 11 #include "llvm/Support/raw_ostream.h" 12 13 using namespace llvm; 14 15 Expected<PassPlugin> PassPlugin::Load(const std::string &Filename) { 16 std::string Error; 17 auto Library = 18 sys::DynamicLibrary::getPermanentLibrary(Filename.c_str(), &Error); 19 if (!Library.isValid()) 20 return make_error<StringError>(Twine("Could not load library '") + 21 Filename + "': " + Error, 22 inconvertibleErrorCode()); 23 24 PassPlugin P{Filename, Library}; 25 auto *getDetailsFn = 26 Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo"); 27 28 if (!getDetailsFn) 29 // If the symbol isn't found, this is probably a legacy plugin, which is an 30 // error 31 return make_error<StringError>(Twine("Plugin entry point not found in '") + 32 Filename + "'. Is this a legacy plugin?", 33 inconvertibleErrorCode()); 34 35 P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)(); 36 37 if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION) 38 return make_error<StringError>( 39 Twine("Wrong API version on plugin '") + Filename + "'. Got version " + 40 Twine(P.Info.APIVersion) + ", supported version is " + 41 Twine(LLVM_PLUGIN_API_VERSION) + ".", 42 inconvertibleErrorCode()); 43 44 if (!P.Info.RegisterPassBuilderCallbacks) 45 return make_error<StringError>(Twine("Empty entry callback in plugin '") + 46 Filename + "'.'", 47 inconvertibleErrorCode()); 48 49 return P; 50 } 51