1 /* Copyright (c) 2007-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/mc/remote/CheckerSide.hpp"
7 #include "src/mc/ModelChecker.hpp"
8 #include "src/mc/sosp/RemoteProcessMemory.hpp"
9 #include "xbt/system_error.hpp"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkerside, mc, "MC communication with the application");
15 namespace simgrid::mc {
16 CheckerSide::CheckerSide(int sockfd, std::unique_ptr<RemoteProcessMemory> memory, ModelChecker* mc)
17 : remote_memory_(std::move(memory)), channel_(sockfd)
19 auto* base = event_base_new();
22 auto* socket_event = event_new(
23 base, get_channel().get_socket(), EV_READ | EV_PERSIST,
24 [](evutil_socket_t sig, short events, void* arg) {
25 auto checker = static_cast<simgrid::mc::CheckerSide*>(arg);
26 if (events == EV_READ) {
27 std::array<char, MC_MESSAGE_LENGTH> buffer;
28 ssize_t size = recv(checker->get_channel().get_socket(), buffer.data(), buffer.size(), MSG_DONTWAIT);
30 XBT_ERROR("Channel::receive failure: %s", strerror(errno));
32 throw simgrid::xbt::errno_error();
35 if (not checker->get_remote_memory().handle_message(buffer.data(), size))
36 checker->break_loop();
38 xbt_die("Unexpected event");
42 event_add(socket_event, nullptr);
43 socket_event_.reset(socket_event);
45 auto* signal_event = event_new(
46 base, SIGCHLD, EV_SIGNAL | EV_PERSIST,
47 [](evutil_socket_t sig, short events, void* arg) {
48 auto checker = static_cast<simgrid::mc::CheckerSide*>(arg);
49 if (events == EV_SIGNAL) {
51 checker->get_remote_memory().handle_waitpid();
53 xbt_die("Unexpected signal: %d", sig);
55 xbt_die("Unexpected event");
59 event_add(signal_event, nullptr);
60 signal_event_.reset(signal_event);
63 void CheckerSide::dispatch_events() const
65 event_base_dispatch(base_.get());
68 void CheckerSide::break_loop() const
70 event_base_loopbreak(base_.get());
73 } // namespace simgrid::mc