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_private.h" // MC_deadlock_check()
29 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_client, mc, "MC client logic");
31 mc_client_t mc_client;
33 void MC_client_init(void)
36 XBT_WARN("MC_client_init called more than once.");
40 char* fd_env = getenv(MC_ENV_SOCKET_FD);
42 xbt_die("MC socket not found");
44 int fd = atoi(fd_env);
45 XBT_DEBUG("Model-checked application found socket FD %i", fd);
48 socklen_t socklen = sizeof(type);
49 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &socklen) != 0)
50 xbt_die("Could not check socket type");
51 if (type != SOCK_DGRAM)
52 xbt_die("Unexpected socket type %i", type);
53 XBT_DEBUG("Model-checked application found expected socket type");
55 mc_client = xbt_new0(s_mc_client_t, 1);
57 mc_client->active = 1;
60 void MC_client_hello(void)
62 if (MC_protocol_hello(mc_client->fd) != 0)
63 xbt_die("Could not say hello 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_send_simple_message(e_mc_message_type type)
74 if (MC_protocol_send_simple_message(mc_client->fd, type))
75 xbt_die("Could not send message %i", type);
78 void MC_client_handle_messages(void)
81 XBT_DEBUG("Waiting messages from model-checker");
83 char message_buffer[MC_MESSAGE_LENGTH];
85 if ((s = MC_receive_message(mc_client->fd, &message_buffer, sizeof(message_buffer), 0)) < 0)
86 xbt_die("Could not receive commands from the model-checker");
88 s_mc_message_t message;
89 if ((size_t) s < sizeof(message))
90 xbt_die("Received message is too small");
91 memcpy(&message, message_buffer, sizeof(message));
92 switch (message.type) {
94 case MC_MESSAGE_DEADLOCK_CHECK:
96 int result = MC_deadlock_check();
97 s_mc_int_message_t answer;
98 answer.type = MC_MESSAGE_DEADLOCK_CHECK_REPLY;
99 answer.value = result;
100 if (MC_protocol_send(mc_client->fd, &answer, sizeof(answer)))
101 xbt_die("Could not send response");
105 case MC_MESSAGE_CONTINUE:
108 case MC_MESSAGE_SIMCALL_HANDLE:
110 s_mc_simcall_handle_message_t message;
111 if (s != sizeof(message))
112 xbt_die("Unexpected size for SIMCALL_HANDLE");
113 memcpy(&message, message_buffer, sizeof(message));
114 smx_process_t process = SIMIX_process_from_PID(message.pid);
116 xbt_die("Invalid pid %lu", (unsigned long) message.pid);
117 SIMIX_simcall_handle(&process->simcall, message.value);
118 MC_protocol_send_simple_message(mc_client->fd, MC_MESSAGE_WAITING);
123 xbt_die("%s received unexpected message %s (%i)",
124 MC_mode_name(mc_mode),
125 MC_message_type_name(message.type),
132 void MC_client_main_loop(void)
135 MC_protocol_send_simple_message(mc_client->fd, MC_MESSAGE_WAITING);
136 MC_client_handle_messages();
137 MC_wait_for_requests();