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