//===- lib/Passes/PassPluginLoader.cpp - Load Plugins for New PM Passes ---===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #include "llvm/Passes/PassPlugin.h" #include "llvm/Support/raw_ostream.h" #include <cstdint> using namespace llvm; Expected<PassPlugin> PassPlugin::Load(const std::string &Filename) { std::string Error; auto Library = sys::DynamicLibrary::getPermanentLibrary(Filename.c_str(), &Error); if (!Library.isValid()) return make_error<StringError>(Twine("Could not load library '") + Filename + "': " + Error, inconvertibleErrorCode()); PassPlugin P{Filename, Library}; intptr_t getDetailsFn = (intptr_t)Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo"); if (!getDetailsFn) // If the symbol isn't found, this is probably a legacy plugin, which is an // error return make_error<StringError>(Twine("Plugin entry point not found in '") + Filename + "'. Is this a legacy plugin?", inconvertibleErrorCode()); P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)(); if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION) return make_error<StringError>( Twine("Wrong API version on plugin '") + Filename + "'. Got version " + Twine(P.Info.APIVersion) + ", supported version is " + Twine(LLVM_PLUGIN_API_VERSION) + ".", inconvertibleErrorCode()); if (!P.Info.RegisterPassBuilderCallbacks) return make_error<StringError>(Twine("Empty entry callback in plugin '") + Filename + "'.'", inconvertibleErrorCode()); return P; } |