1 //===- lib/Passes/PassPluginLoader.cpp - Load Plugins for New PM Passes ---===// 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 #include "llvm/Passes/PassPlugin.h" 10 #include "llvm/Support/raw_ostream.h" 11 12 #include <cstdint> 13 14 using namespace llvm; 15 16 Expected<PassPlugin> PassPlugin::Load(const std::string &Filename) { 17 std::string Error; 18 auto Library = 19 sys::DynamicLibrary::getPermanentLibrary(Filename.c_str(), &Error); 20 if (!Library.isValid()) 21 return make_error<StringError>(Twine("Could not load library '") + 22 Filename + "': " + Error, 23 inconvertibleErrorCode()); 24 25 PassPlugin P{Filename, Library}; 26 intptr_t getDetailsFn = 27 (intptr_t)Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo"); 28 29 if (!getDetailsFn) 30 // If the symbol isn't found, this is probably a legacy plugin, which is an 31 // error 32 return make_error<StringError>(Twine("Plugin entry point not found in '") + 33 Filename + "'. Is this a legacy plugin?", 34 inconvertibleErrorCode()); 35 36 P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)(); 37 38 if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION) 39 return make_error<StringError>( 40 Twine("Wrong API version on plugin '") + Filename + "'. Got version " + 41 Twine(P.Info.APIVersion) + ", supported version is " + 42 Twine(LLVM_PLUGIN_API_VERSION) + ".", 43 inconvertibleErrorCode()); 44 45 if (!P.Info.RegisterPassBuilderCallbacks) 46 return make_error<StringError>(Twine("Empty entry callback in plugin '") + 47 Filename + "'.'", 48 inconvertibleErrorCode()); 49 50 return P; 51 } 52