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//===- 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};
// llvmGetPassPluginInfo should be resolved to the definition from the plugin
// we are currently loading.
intptr_t getDetailsFn =
(intptr_t)Library.getAddressOfSymbol("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;
}
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