| 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-exception |
|---|
| 6 | // |
|---|
| 7 | //===----------------------------------------------------------------------===// |
|---|
| 8 | |
|---|
| 9 | #include "llvm/Passes/PassPlugin.h" |
|---|
| 10 | #include "llvm/Support/raw_ostream.h" |
|---|
| 11 | |
|---|
| 12 | #include <cstdint> |
|---|
| 13 | |
|---|
| 14 | using namespace llvm; |
|---|
| 15 | |
|---|
| 16 | Expected<PassPlugin> PassPlugin::Load(const std::string &Filename) { |
|---|
| 17 | std::string Error; |
|---|
| 18 | auto Library = |
|---|
| 19 | sys::DynamicLibrary::getPermanentLibrary(filename: Filename.c_str(), errMsg: &Error); |
|---|
| 20 | if (!Library.isValid()) |
|---|
| 21 | return make_error<StringError>(Args: Twine("Could not load library '" ) + |
|---|
| 22 | Filename + "': " + Error, |
|---|
| 23 | Args: inconvertibleErrorCode()); |
|---|
| 24 | |
|---|
| 25 | PassPlugin P{Filename, Library}; |
|---|
| 26 | |
|---|
| 27 | // llvmGetPassPluginInfo should be resolved to the definition from the plugin |
|---|
| 28 | // we are currently loading. |
|---|
| 29 | intptr_t getDetailsFn = |
|---|
| 30 | (intptr_t)Library.getAddressOfSymbol(symbolName: "llvmGetPassPluginInfo" ); |
|---|
| 31 | |
|---|
| 32 | if (!getDetailsFn) |
|---|
| 33 | // If the symbol isn't found, this is probably a legacy plugin, which is an |
|---|
| 34 | // error |
|---|
| 35 | return make_error<StringError>(Args: Twine("Plugin entry point not found in '" ) + |
|---|
| 36 | Filename + "'. Is this a legacy plugin?" , |
|---|
| 37 | Args: 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 | Args: Twine("Wrong API version on plugin '" ) + Filename + "'. Got version " + |
|---|
| 44 | Twine(P.Info.APIVersion) + ", supported version is " + |
|---|
| 45 | Twine(LLVM_PLUGIN_API_VERSION) + "." , |
|---|
| 46 | Args: inconvertibleErrorCode()); |
|---|
| 47 | |
|---|
| 48 | if (!P.Info.RegisterPassBuilderCallbacks) |
|---|
| 49 | return make_error<StringError>(Args: Twine("Empty entry callback in plugin '" ) + |
|---|
| 50 | Filename + "'.'" , |
|---|
| 51 | Args: inconvertibleErrorCode()); |
|---|
| 52 | |
|---|
| 53 | return P; |
|---|
| 54 | } |
|---|
| 55 | |
|---|
