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()
27 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_client, mc, "MC client logic");
29 mc_client_t mc_client;
31 void MC_client_init(void)
34 XBT_WARN("MC_client_init called more than once.");
38 char* fd_env = getenv(MC_ENV_SOCKET_FD);
40 xbt_die("MC socket not found");
42 int fd = atoi(fd_env);
43 XBT_DEBUG("Model-checked application found socket FD %i", fd);
46 socklen_t socklen = sizeof(type);
47 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &socklen) != 0)
48 xbt_die("Could not check socket type");
49 if (type != SOCK_DGRAM)
50 xbt_die("Unexpected socket type %i", type);
51 XBT_DEBUG("Model-checked application found expected socket type");
53 mc_client = xbt_new0(s_mc_client_t, 1);
55 mc_client->active = 1;
58 void MC_client_hello(void)
60 XBT_DEBUG("Greeting the MC server");
61 if (MC_protocol_hello(mc_client->fd) != 0)
62 xbt_die("Could not say hello the MC server");
63 XBT_DEBUG("Greeted the MC server");
66 void MC_client_send_message(void* message, size_t size)
68 if (MC_protocol_send(mc_client->fd, message, size))
69 xbt_die("Could not send message %i", (int) ((mc_message_t)message)->type);
72 void MC_client_handle_messages(void)
75 XBT_DEBUG("Waiting messages from model-checker");
77 char message_buffer[MC_MESSAGE_LENGTH];
79 if ((s = recv(mc_client->fd, &message_buffer, sizeof(message_buffer), 0)) == -1)
80 xbt_die("Could not receive commands from the model-checker");
82 XBT_DEBUG("Receive message from model-checker");
83 s_mc_message_t message;
84 if (s < sizeof(message))
85 xbt_die("Message is too short");
86 memcpy(&message, message_buffer, sizeof(message));
87 switch (message.type) {
89 case MC_MESSAGE_DEADLOCK_CHECK:
91 int result = MC_deadlock_check();
92 s_mc_int_message_t answer;
93 answer.type = MC_MESSAGE_DEADLOCK_CHECK_REPLY;
94 answer.value = result;
95 if (MC_protocol_send(mc_client->fd, &answer, sizeof(answer)))
96 xbt_die("Could nor send response");
100 case MC_MESSAGE_CONTINUE:
104 xbt_die("Unexpected message from model-checker %i", message.type);