1 /* Copyright (c) 2008-2015. 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. */
25 #include <xbt/automaton.h>
27 #include "src/simix/smx_process_private.h"
30 #include <libunwind.h>
31 #include "src/mc/mc_comm_pattern.h"
32 #include "src/mc/mc_request.h"
33 #include "src/mc/mc_safety.h"
34 #include "src/mc/mc_snapshot.h"
35 #include "src/mc/mc_liveness.h"
36 #include "src/mc/mc_private.h"
37 #include "src/mc/mc_unw.h"
38 #include "src/mc/mc_smx.h"
41 #include "src/mc/mc_record.h"
42 #include "src/mc/mc_protocol.h"
43 #include "src/mc/mc_client.h"
47 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
48 "Logging specific to MC (global)");
57 std::vector<double> processes_time;
63 int user_max_depth_reached = 0;
65 /* MC global data structures */
66 mc_state_t mc_current_state = nullptr;
67 char mc_replay_mode = FALSE;
69 mc_stats_t mc_stats = nullptr;
70 mc_global_t initial_global_state = nullptr;
71 xbt_fifo_t mc_stack = nullptr;
74 xbt_automaton_t _mc_property_automaton = nullptr;
77 FILE *dot_output = nullptr;
78 const char *colors[13];
81 /******************************* Initialisation of MC *******************************/
82 /*********************************************************************************/
84 void MC_init_dot_output()
85 { /* FIXME : more colors */
90 colors[3] = "goldenrod";
93 colors[6] = "magenta";
94 colors[7] = "turquoise4";
96 colors[9] = "forestgreen";
97 colors[10] = "hotpink";
98 colors[11] = "lightblue";
101 dot_output = fopen(_sg_mc_dot_output_file, "w");
103 if (dot_output == nullptr) {
104 perror("Error open dot output file");
109 "digraph graphname{\n fixedsize=true; rankdir=TB; ranksep=.25; edge [fontsize=12]; node [fontsize=10, shape=circle,width=.5 ]; graph [resolution=20, fontsize=10];\n");
116 simgrid::mc::processes_time.resize(simix_process_maxpid);
118 if (_sg_mc_visited > 0 || _sg_mc_liveness || _sg_mc_termination || mc_mode == MC_MODE_SERVER) {
119 /* Those requests are handled on the client side and propagated by message
122 MC_ignore_heap(simgrid::mc::processes_time.data(),
123 simix_process_maxpid * sizeof(double));
125 smx_process_t process;
126 xbt_swag_foreach(process, simix_global->process_list)
127 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
133 /******************************* Core of MC *******************************/
134 /**************************************************************************/
138 mc_mode = MC_MODE_CLIENT;
140 MC_client_main_loop();
145 simgrid::mc::processes_time.clear();
151 int MC_deadlock_check()
153 if (mc_mode == MC_MODE_SERVER) {
155 if ((res = mc_model_checker->process().send_message(MC_MESSAGE_DEADLOCK_CHECK)))
156 xbt_die("Could not check deadlock state");
157 s_mc_int_message_t message;
158 ssize_t s = mc_model_checker->process().receive_message(message);
160 xbt_die("Could not receive message");
161 if (s != sizeof(message) || message.type != MC_MESSAGE_DEADLOCK_CHECK_REPLY)
162 xbt_die("%s received unexpected message %s (%i, size=%i) "
163 "expected MC_MESSAGE_DEADLOCK_CHECK_REPLY (%i, size=%i)",
164 MC_mode_name(mc_mode),
165 MC_message_type_name(message.type), (int) message.type, (int) s,
166 (int) MC_MESSAGE_DEADLOCK_CHECK_REPLY, (int) sizeof(message)
168 return message.value;
171 int deadlock = FALSE;
172 smx_process_t process;
173 if (xbt_swag_size(simix_global->process_list)) {
175 xbt_swag_foreach(process, simix_global->process_list)
176 if (simgrid::mc::process_is_enabled(process)) {
186 * \brief Re-executes from the state at position start all the transitions indicated by
187 * a given model-checker stack.
188 * \param stack The stack with the transitions to execute.
189 * \param start Start index to begin the re-execution.
191 void MC_replay(xbt_fifo_t stack)
193 int value, count = 1;
195 smx_simcall_t req = nullptr, saved_req = NULL;
196 xbt_fifo_item_t item, start_item;
199 XBT_DEBUG("**** Begin Replay ****");
201 /* Intermediate backtracking */
202 if(_sg_mc_checkpoint > 0 || _sg_mc_termination || _sg_mc_visited > 0) {
203 start_item = xbt_fifo_get_first_item(stack);
204 state = (mc_state_t)xbt_fifo_get_item_content(start_item);
205 if(state->system_state){
206 simgrid::mc::restore_snapshot(state->system_state);
207 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
208 MC_restore_communications_pattern(state);
214 /* Restore the initial state */
215 simgrid::mc::restore_snapshot(initial_global_state->snapshot);
216 /* At the moment of taking the snapshot the raw heap was set, so restoring
217 * it will set it back again, we have to unset it to continue */
219 start_item = xbt_fifo_get_last_item(stack);
221 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
222 // int n = xbt_dynar_length(incomplete_communications_pattern);
223 unsigned n = MC_smx_get_maxpid();
224 assert(n == xbt_dynar_length(incomplete_communications_pattern));
225 assert(n == xbt_dynar_length(initial_communications_pattern));
226 for (unsigned j=0; j < n ; j++) {
227 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
228 xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t)->index_comm = 0;
232 /* Traverse the stack from the state at position start and re-execute the transitions */
233 for (item = start_item;
234 item != xbt_fifo_get_first_item(stack);
235 item = xbt_fifo_get_prev_item(item)) {
237 state = (mc_state_t) xbt_fifo_get_item_content(item);
238 saved_req = MC_state_get_executed_request(state, &value);
241 /* because we got a copy of the executed request, we have to fetch the
242 real one, pointed by the request field of the issuer process */
244 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
245 req = &issuer->simcall;
247 /* Debug information */
248 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
249 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
250 XBT_DEBUG("Replay: %s (%p)", req_str, state);
254 /* TODO : handle test and testany simcalls */
255 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
256 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
257 call = MC_get_call_type(req);
259 simgrid::mc::handle_simcall(req, value);
261 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
262 MC_handle_comm_pattern(call, req, value, nullptr, 1);
264 mc_model_checker->wait_for_requests();
269 /* Update statistics */
270 mc_stats->visited_states++;
271 mc_stats->executed_transitions++;
275 XBT_DEBUG("**** End Replay ****");
278 void MC_replay_liveness(xbt_fifo_t stack)
280 xbt_fifo_item_t item;
281 mc_pair_t pair = nullptr;
282 mc_state_t state = nullptr;
283 smx_simcall_t req = nullptr, saved_req = NULL;
284 int value, depth = 1;
287 XBT_DEBUG("**** Begin Replay ****");
289 /* Intermediate backtracking */
290 if(_sg_mc_checkpoint > 0) {
291 item = xbt_fifo_get_first_item(stack);
292 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
293 if(pair->graph_state->system_state){
294 simgrid::mc::restore_snapshot(pair->graph_state->system_state);
299 /* Restore the initial state */
300 simgrid::mc::restore_snapshot(initial_global_state->snapshot);
302 /* Traverse the stack from the initial state and re-execute the transitions */
303 for (item = xbt_fifo_get_last_item(stack);
304 item != xbt_fifo_get_first_item(stack);
305 item = xbt_fifo_get_prev_item(item)) {
307 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
309 state = (mc_state_t) pair->graph_state;
311 if (pair->exploration_started) {
313 saved_req = MC_state_get_executed_request(state, &value);
315 if (saved_req != nullptr) {
316 /* because we got a copy of the executed request, we have to fetch the
317 real one, pointed by the request field of the issuer process */
318 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
319 req = &issuer->simcall;
321 /* Debug information */
322 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
323 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
324 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
330 simgrid::mc::handle_simcall(req, value);
331 mc_model_checker->wait_for_requests();
334 /* Update statistics */
335 mc_stats->visited_pairs++;
336 mc_stats->executed_transitions++;
342 XBT_DEBUG("**** End Replay ****");
346 * \brief Dumps the contents of a model-checker's stack and shows the actual
348 * \param stack The stack to dump
350 void MC_dump_stack_safety(xbt_fifo_t stack)
352 MC_show_stack_safety(stack);
356 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != nullptr)
357 MC_state_delete(state, !state->in_visited_states ? 1 : 0);
361 void MC_show_stack_safety(xbt_fifo_t stack)
365 xbt_fifo_item_t item;
367 char *req_str = nullptr;
369 for (item = xbt_fifo_get_last_item(stack);
370 item; item = xbt_fifo_get_prev_item(item)) {
371 state = (mc_state_t)xbt_fifo_get_item_content(item);
372 req = MC_state_get_executed_request(state, &value);
374 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
375 XBT_INFO("%s", req_str);
381 void MC_show_deadlock(smx_simcall_t req)
383 /*char *req_str = nullptr; */
384 XBT_INFO("**************************");
385 XBT_INFO("*** DEAD-LOCK DETECTED ***");
386 XBT_INFO("**************************");
387 XBT_INFO("Locked request:");
388 /*req_str = simgrid::mc::request_to_string(req);
389 XBT_INFO("%s", req_str);
390 xbt_free(req_str); */
391 XBT_INFO("Counter-example execution trace:");
392 MC_dump_stack_safety(mc_stack);
393 MC_print_statistics(mc_stats);
396 void MC_show_non_termination(void){
397 XBT_INFO("******************************************");
398 XBT_INFO("*** NON-PROGRESSIVE CYCLE DETECTED ***");
399 XBT_INFO("******************************************");
400 XBT_INFO("Counter-example execution trace:");
401 MC_dump_stack_safety(mc_stack);
402 MC_print_statistics(mc_stats);
406 void MC_show_stack_liveness(xbt_fifo_t stack)
410 xbt_fifo_item_t item;
412 char *req_str = nullptr;
414 for (item = xbt_fifo_get_last_item(stack);
415 item; item = xbt_fifo_get_prev_item(item)) {
416 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
417 req = MC_state_get_executed_request(pair->graph_state, &value);
418 if (req && req->call != SIMCALL_NONE) {
419 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
420 XBT_INFO("%s", req_str);
427 void MC_dump_stack_liveness(xbt_fifo_t stack)
430 while ((pair = (mc_pair_t) xbt_fifo_pop(stack)) != nullptr)
431 MC_pair_delete(pair);
434 void MC_print_statistics(mc_stats_t stats)
436 if(_sg_mc_comms_determinism) {
437 if (!initial_global_state->recv_deterministic && initial_global_state->send_deterministic){
438 XBT_INFO("******************************************************");
439 XBT_INFO("**** Only-send-deterministic communication pattern ****");
440 XBT_INFO("******************************************************");
441 XBT_INFO("%s", initial_global_state->recv_diff);
442 }else if(!initial_global_state->send_deterministic && initial_global_state->recv_deterministic) {
443 XBT_INFO("******************************************************");
444 XBT_INFO("**** Only-recv-deterministic communication pattern ****");
445 XBT_INFO("******************************************************");
446 XBT_INFO("%s", initial_global_state->send_diff);
450 if (stats->expanded_pairs == 0) {
451 XBT_INFO("Expanded states = %lu", stats->expanded_states);
452 XBT_INFO("Visited states = %lu", stats->visited_states);
454 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
455 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
457 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
458 if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
459 fprintf(dot_output, "}\n");
462 if (initial_global_state != nullptr && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) {
463 XBT_INFO("Send-deterministic : %s", !initial_global_state->send_deterministic ? "No" : "Yes");
464 if (_sg_mc_comms_determinism)
465 XBT_INFO("Recv-deterministic : %s", !initial_global_state->recv_deterministic ? "No" : "Yes");
467 if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
468 int ret=system("free");
469 if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
473 void MC_automaton_load(const char *file)
475 if (_mc_property_automaton == nullptr)
476 _mc_property_automaton = xbt_automaton_new();
478 xbt_automaton_load(_mc_property_automaton, file);
481 // TODO, fix cross-process access (this function is not used)
482 static void MC_dump_stacks(FILE* file)
485 for (auto const& stack : mc_model_checker->process().stack_areas()) {
487 xbt_die("Fix cross-process access to the context");
488 unw_context_t * context = (unw_context_t *)stack.context;
489 fprintf(file, "Stack %i:\n", nstack);
494 unw_init_local (&c, context);
497 const char * name = !unw_get_proc_name(&c, buffer, 100, &off) ? buffer : "?";
498 #if defined(__x86_64__)
501 unw_get_reg(&c, UNW_X86_64_RIP, &rip);
502 unw_get_reg(&c, UNW_X86_64_RSP, &rsp);
503 fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
504 nframe, name, (std::uint64_t) rip, (std::uint64_t) rsp);
506 fprintf(file, " %i: %s\n", nframe, name);
509 } while(unw_step(&c));
516 double MC_process_clock_get(smx_process_t process)
518 if (simgrid::mc::processes_time.empty())
520 if (process != nullptr)
521 return simgrid::mc::processes_time[process->pid];
525 void MC_process_clock_add(smx_process_t process, double amount)
527 simgrid::mc::processes_time[process->pid] += amount;
531 void MC_report_assertion_error(void)
533 XBT_INFO("**************************");
534 XBT_INFO("*** PROPERTY NOT VALID ***");
535 XBT_INFO("**************************");
536 XBT_INFO("Counter-example execution trace:");
537 MC_record_dump_path(mc_stack);
538 MC_dump_stack_safety(mc_stack);
539 MC_print_statistics(mc_stats);
542 void MC_report_crash(int status)
544 XBT_INFO("**************************");
545 XBT_INFO("** CRASH IN THE PROGRAM **");
546 XBT_INFO("**************************");
547 if (WIFSIGNALED(status))
548 XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
549 else if (WIFEXITED(status))
550 XBT_INFO("From exit: %i", WEXITSTATUS(status));
551 if (WCOREDUMP(status))
552 XBT_INFO("A core dump was generated by the system.");
554 XBT_INFO("No core dump was generated by the system.");
555 XBT_INFO("Counter-example execution trace:");
556 MC_record_dump_path(mc_stack);
557 MC_dump_stack_safety(mc_stack);
558 MC_print_statistics(mc_stats);