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 #include <cstdint> 14 15 using namespace llvm; 16 Load(const std::string & Filename)17Expected<PassPlugin> PassPlugin::Load(const std::string &Filename) { 18 std::string Error; 19 auto Library = 20 sys::DynamicLibrary::getPermanentLibrary(Filename.c_str(), &Error); 21 if (!Library.isValid()) 22 return make_error<StringError>(Twine("Could not load library '") + 23 Filename + "': " + Error, 24 inconvertibleErrorCode()); 25 26 PassPlugin P{Filename, Library}; 27 intptr_t getDetailsFn = 28 (intptr_t)Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo"); 29 30 if (!getDetailsFn) 31 // If the symbol isn't found, this is probably a legacy plugin, which is an 32 // error 33 return make_error<StringError>(Twine("Plugin entry point not found in '") + 34 Filename + "'. Is this a legacy plugin?", 35 inconvertibleErrorCode()); 36 37 P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)(); 38 39 if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION) 40 return make_error<StringError>( 41 Twine("Wrong API version on plugin '") + Filename + "'. Got version " + 42 Twine(P.Info.APIVersion) + ", supported version is " + 43 Twine(LLVM_PLUGIN_API_VERSION) + ".", 44 inconvertibleErrorCode()); 45 46 if (!P.Info.RegisterPassBuilderCallbacks) 47 return make_error<StringError>(Twine("Empty entry callback in plugin '") + 48 Filename + "'.'", 49 inconvertibleErrorCode()); 50 51 return P; 52 } 53