1 /* Copyright (c) 2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <sys/types.h>
12 #include <sys/socket.h>
15 #include <xbt/sysdep.h>
16 #include <xbt/mmalloc.h>
18 #include "mc_protocol.h"
19 #include "mc_client.h"
21 // We won't need those once the separation MCer/MCed is complete:
22 #include "mc_mmalloc.h"
23 #include "mc_ignore.h"
24 #include "mc_model_checker.h"
25 #include "mc_private.h" // MC_deadlock_check()
30 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_client, mc, "MC client logic");
32 mc_client_t mc_client;
34 void MC_client_init(void)
37 XBT_WARN("MC_client_init called more than once.");
41 char* fd_env = getenv(MC_ENV_SOCKET_FD);
43 xbt_die("MC socket not found");
45 int fd = atoi(fd_env);
46 XBT_DEBUG("Model-checked application found socket FD %i", fd);
49 socklen_t socklen = sizeof(type);
50 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &socklen) != 0)
51 xbt_die("Could not check socket type");
52 if (type != SOCK_DGRAM)
53 xbt_die("Unexpected socket type %i", type);
54 XBT_DEBUG("Model-checked application found expected socket type");
56 mc_client = xbt_new0(s_mc_client_t, 1);
58 mc_client->active = 1;
61 void MC_client_hello(void)
63 if (MC_protocol_hello(mc_client->fd) != 0)
64 xbt_die("Could not say hello the MC server");
67 void MC_client_send_message(void* message, size_t size)
69 if (MC_protocol_send(mc_client->fd, message, size))
70 xbt_die("Could not send message %i", (int) ((mc_message_t)message)->type);
73 void MC_client_send_simple_message(e_mc_message_type type)
75 if (MC_protocol_send_simple_message(mc_client->fd, type))
76 xbt_die("Could not send message %i", type);
79 void MC_client_handle_messages(void)
82 XBT_DEBUG("Waiting messages from model-checker");
84 char message_buffer[MC_MESSAGE_LENGTH];
86 if ((s = MC_receive_message(mc_client->fd, &message_buffer, sizeof(message_buffer), 0)) < 0)
87 xbt_die("Could not receive commands from the model-checker");
89 s_mc_message_t message;
90 if ((size_t) s < sizeof(message))
91 xbt_die("Received message is too small");
92 memcpy(&message, message_buffer, sizeof(message));
93 switch (message.type) {
95 case MC_MESSAGE_DEADLOCK_CHECK:
97 int result = MC_deadlock_check();
98 s_mc_int_message_t answer;
99 answer.type = MC_MESSAGE_DEADLOCK_CHECK_REPLY;
100 answer.value = result;
101 if (MC_protocol_send(mc_client->fd, &answer, sizeof(answer)))
102 xbt_die("Could not send response");
106 case MC_MESSAGE_CONTINUE:
109 case MC_MESSAGE_SIMCALL_HANDLE:
111 s_mc_simcall_handle_message_t message;
112 if (s != sizeof(message))
113 xbt_die("Unexpected size for SIMCALL_HANDLE");
114 memcpy(&message, message_buffer, sizeof(message));
115 smx_process_t process = SIMIX_process_from_PID(message.pid);
117 xbt_die("Invalid pid %lu", (unsigned long) message.pid);
118 SIMIX_simcall_handle(&process->simcall, message.value);
119 MC_protocol_send_simple_message(mc_client->fd, MC_MESSAGE_WAITING);
124 xbt_die("%s received unexpected message %s (%i)",
125 MC_mode_name(mc_mode),
126 MC_message_type_name(message.type),
133 void MC_client_main_loop(void)
136 MC_protocol_send_simple_message(mc_client->fd, MC_MESSAGE_WAITING);
137 MC_client_handle_messages();
138 MC_wait_for_requests();