1//===----------- ChildTarget.cpp - Out-of-proc executor for lli -----------===//
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// Simple out-of-process executor for lli.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.h"
14#include "llvm/ExecutionEngine/Orc/TargetProcess/RegisterEHFrames.h"
15#include "llvm/ExecutionEngine/Orc/TargetProcess/SimpleExecutorMemoryManager.h"
16#include "llvm/ExecutionEngine/Orc/TargetProcess/SimpleRemoteEPCServer.h"
17#include "llvm/Support/DynamicLibrary.h"
18#include "llvm/Support/Error.h"
19#include "llvm/Support/MathExtras.h"
20#include "llvm/Support/raw_ostream.h"
21#include <cstring>
22#include <sstream>
23
24using namespace llvm;
25using namespace llvm::orc;
26
27ExitOnError ExitOnErr;
28
29int main(int argc, char *argv[]) {
30#if LLVM_ENABLE_THREADS
31
32 if (argc != 3) {
33 errs() << "Usage: " << argv[0] << " <input fd> <output fd>\n";
34 return 1;
35 }
36
37 if (sys::DynamicLibrary::LoadLibraryPermanently(Filename: nullptr)) {
38 errs() << "Error loading program symbols.\n";
39 return 1;
40 }
41
42 ExitOnErr.setBanner(std::string(argv[0]) + ": ");
43
44 int InFD = 0;
45 int OutFD = 0;
46 {
47 std::istringstream InFDStream(argv[1]), OutFDStream(argv[2]);
48 InFDStream >> InFD;
49 OutFDStream >> OutFD;
50 }
51
52 auto Server =
53 ExitOnErr(SimpleRemoteEPCServer::Create<FDSimpleRemoteEPCTransport>(
54 SetupFunction: [](SimpleRemoteEPCServer::Setup &S) -> Error {
55 S.setDispatcher(
56 std::make_unique<SimpleRemoteEPCServer::ThreadDispatcher>());
57 S.bootstrapSymbols() =
58 SimpleRemoteEPCServer::defaultBootstrapSymbols();
59 S.services().push_back(
60 x: std::make_unique<rt_bootstrap::SimpleExecutorMemoryManager>());
61 return Error::success();
62 },
63 TransportTCtorArgs&: InFD, TransportTCtorArgs&: OutFD));
64
65 ExitOnErr(Server->waitForDisconnect());
66
67 return 0;
68
69#else
70 errs() << argv[0]
71 << " error: this tool requires threads, but LLVM was "
72 "built with LLVM_ENABLE_THREADS=Off\n";
73 return 1;
74#endif
75}
76