55 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "llvm/Passes/PassPlugin.h"10#include "llvm/Support/raw_ostream.h"11 12#include <cstdint>13 14using namespace llvm;15 16Expected<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 27 // llvmGetPassPluginInfo should be resolved to the definition from the plugin28 // we are currently loading.29 intptr_t getDetailsFn =30 (intptr_t)Library.getAddressOfSymbol("llvmGetPassPluginInfo");31 32 if (!getDetailsFn)33 // If the symbol isn't found, this is probably a legacy plugin, which is an34 // error35 return make_error<StringError>(Twine("Plugin entry point not found in '") +36 Filename + "'. Is this a legacy plugin?",37 inconvertibleErrorCode());38 39 P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)();40 41 if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION)42 return make_error<StringError>(43 Twine("Wrong API version on plugin '") + Filename + "'. Got version " +44 Twine(P.Info.APIVersion) + ", supported version is " +45 Twine(LLVM_PLUGIN_API_VERSION) + ".",46 inconvertibleErrorCode());47 48 if (!P.Info.RegisterPassBuilderCallbacks)49 return make_error<StringError>(Twine("Empty entry callback in plugin '") +50 Filename + "'.'",51 inconvertibleErrorCode());52 53 return P;54}55