]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - contrib/llvm-project/llvm/lib/Passes/PassPlugin.cpp
MFC r355940:
[FreeBSD/FreeBSD.git] / contrib / llvm-project / llvm / lib / Passes / PassPlugin.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-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.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   intptr_t getDetailsFn =
27       (intptr_t)Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo");
28
29   if (!getDetailsFn)
30     // If the symbol isn't found, this is probably a legacy plugin, which is an
31     // error
32     return make_error<StringError>(Twine("Plugin entry point not found in '") +
33                                        Filename + "'. Is this a legacy plugin?",
34                                    inconvertibleErrorCode());
35
36   P.Info = reinterpret_cast<decltype(llvmGetPassPluginInfo) *>(getDetailsFn)();
37
38   if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION)
39     return make_error<StringError>(
40         Twine("Wrong API version on plugin '") + Filename + "'. Got version " +
41             Twine(P.Info.APIVersion) + ", supported version is " +
42             Twine(LLVM_PLUGIN_API_VERSION) + ".",
43         inconvertibleErrorCode());
44
45   if (!P.Info.RegisterPassBuilderCallbacks)
46     return make_error<StringError>(Twine("Empty entry callback in plugin '") +
47                                        Filename + "'.'",
48                                    inconvertibleErrorCode());
49
50   return P;
51 }