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/Config/llvm-config.h" // for LLVM_ENABLE_THREADS
14#include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.h"
15#include "llvm/ExecutionEngine/Orc/TargetProcess/RegisterEHFrames.h"
16#include "llvm/ExecutionEngine/Orc/TargetProcess/SimpleExecutorMemoryManager.h"
17#include "llvm/ExecutionEngine/Orc/TargetProcess/SimpleRemoteEPCServer.h"
18#include "llvm/Support/DynamicLibrary.h"
19#include "llvm/Support/Error.h"
20#include "llvm/Support/MathExtras.h"
21#include "llvm/Support/raw_ostream.h"
22#include <cstring>
23#include <sstream>
24
25using namespace llvm;
26using namespace llvm::orc;
27
28ExitOnError ExitOnErr;
29
30int main(int argc, char *argv[]) {
31#if LLVM_ENABLE_THREADS
32
33 if (argc != 3) {
34 errs() << "Usage: " << argv[0] << " <input fd> <output fd>\n";
35 return 1;
36 }
37
38 if (sys::DynamicLibrary::LoadLibraryPermanently(Filename: nullptr)) {
39 errs() << "Error loading program symbols.\n";
40 return 1;
41 }
42
43 ExitOnErr.setBanner(std::string(argv[0]) + ": ");
44
45 int InFD = 0;
46 int OutFD = 0;
47 {
48 std::istringstream InFDStream(argv[1]), OutFDStream(argv[2]);
49 InFDStream >> InFD;
50 OutFDStream >> OutFD;
51 }
52
53 auto Server =
54 ExitOnErr(SimpleRemoteEPCServer::Create<FDSimpleRemoteEPCTransport>(
55 SetupFunction: [](SimpleRemoteEPCServer::Setup &S) -> Error {
56 S.setDispatcher(
57 std::make_unique<SimpleRemoteEPCServer::ThreadDispatcher>());
58 S.bootstrapSymbols() =
59 SimpleRemoteEPCServer::defaultBootstrapSymbols();
60 S.services().push_back(
61 x: std::make_unique<rt_bootstrap::SimpleExecutorMemoryManager>());
62 return Error::success();
63 },
64 TransportTCtorArgs&: InFD, TransportTCtorArgs&: OutFD));
65
66 ExitOnErr(Server->waitForDisconnect());
67
68 return 0;
69
70#else
71 errs() << argv[0]
72 << " error: this tool requires threads, but LLVM was "
73 "built with LLVM_ENABLE_THREADS=Off\n";
74 return 1;
75#endif
76}
77