1 //===- lib/Passes/PassPluginLoader.cpp - Load Plugins for New PM Passes ---===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Passes/PassPlugin.h"
11 #include "llvm/Support/raw_ostream.h"
17 Expected<PassPlugin> PassPlugin::Load(const std::string &Filename) {
20 sys::DynamicLibrary::getPermanentLibrary(Filename.c_str(), &Error);
21 if (!Library.isValid())
22 return make_error<StringError>(Twine("Could not load library '") +
23 Filename + "': " + Error,
24 inconvertibleErrorCode());
26 PassPlugin P{Filename, Library};
27 intptr_t getDetailsFn =
28 (intptr_t)Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo");
31 // If the symbol isn't found, this is probably a legacy plugin, which is an
33 return make_error<StringError>(Twine("Plugin entry point not found in '") +
34 Filename + "'. Is this a legacy plugin?",
35 inconvertibleErrorCode());
37 P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)();
39 if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION)
40 return make_error<StringError>(
41 Twine("Wrong API version on plugin '") + Filename + "'. Got version " +
42 Twine(P.Info.APIVersion) + ", supported version is " +
43 Twine(LLVM_PLUGIN_API_VERSION) + ".",
44 inconvertibleErrorCode());
46 if (!P.Info.RegisterPassBuilderCallbacks)
47 return make_error<StringError>(Twine("Empty entry callback in plugin '") +
49 inconvertibleErrorCode());