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/Client.hpp"
45 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc, "Logging specific to MC (global)");
52 std::vector<double> processes_time;
58 int user_max_depth_reached = 0;
60 /* MC global data structures */
61 mc_state_t mc_current_state = nullptr;
62 char mc_replay_mode = false;
64 mc_stats_t mc_stats = nullptr;
65 mc_global_t initial_global_state = nullptr;
66 xbt_fifo_t mc_stack = nullptr;
73 xbt_automaton_t property_automaton = nullptr;
79 FILE *dot_output = nullptr;
80 const char *colors[13];
83 /******************************* Initialisation of MC *******************************/
84 /*********************************************************************************/
86 void MC_init_dot_output()
87 { /* FIXME : more colors */
92 colors[3] = "goldenrod";
95 colors[6] = "magenta";
96 colors[7] = "turquoise4";
98 colors[9] = "forestgreen";
99 colors[10] = "hotpink";
100 colors[11] = "lightblue";
103 dot_output = fopen(_sg_mc_dot_output_file, "w");
105 if (dot_output == nullptr) {
106 perror("Error open dot output file");
111 "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");
118 simgrid::mc::processes_time.resize(simix_process_maxpid);
120 if (_sg_mc_visited > 0 || _sg_mc_liveness || _sg_mc_termination || mc_mode == MC_MODE_SERVER) {
121 /* Those requests are handled on the client side and propagated by message
124 MC_ignore_heap(simgrid::mc::processes_time.data(),
125 simix_process_maxpid * sizeof(double));
127 smx_process_t process;
128 xbt_swag_foreach(process, simix_global->process_list)
129 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
135 /******************************* Core of MC *******************************/
136 /**************************************************************************/
140 mc_mode = MC_MODE_CLIENT;
142 simgrid::mc::Client::get()->mainLoop();
147 simgrid::mc::processes_time.clear();
153 int MC_deadlock_check()
155 if (mc_mode == MC_MODE_SERVER) {
157 if ((res = mc_model_checker->process().getChannel().send(MC_MESSAGE_DEADLOCK_CHECK)))
158 xbt_die("Could not check deadlock state");
159 s_mc_int_message_t message;
160 ssize_t s = mc_model_checker->process().getChannel().receive(message);
162 xbt_die("Could not receive message");
163 if (s != sizeof(message) || message.type != MC_MESSAGE_DEADLOCK_CHECK_REPLY)
164 xbt_die("%s received unexpected message %s (%i, size=%i) "
165 "expected MC_MESSAGE_DEADLOCK_CHECK_REPLY (%i, size=%i)",
166 MC_mode_name(mc_mode),
167 MC_message_type_name(message.type), (int) message.type, (int) s,
168 (int) MC_MESSAGE_DEADLOCK_CHECK_REPLY, (int) sizeof(message)
170 return message.value;
173 bool deadlock = false;
174 smx_process_t process;
175 if (xbt_swag_size(simix_global->process_list)) {
177 xbt_swag_foreach(process, simix_global->process_list)
178 if (simgrid::mc::process_is_enabled(process)) {
188 * \brief Re-executes from the state at position start all the transitions indicated by
189 * a given model-checker stack.
190 * \param stack The stack with the transitions to execute.
191 * \param start Start index to begin the re-execution.
193 void MC_replay(xbt_fifo_t stack)
195 int value, count = 1;
197 smx_simcall_t req = nullptr, saved_req = NULL;
198 xbt_fifo_item_t item, start_item;
201 XBT_DEBUG("**** Begin Replay ****");
203 /* Intermediate backtracking */
204 if(_sg_mc_checkpoint > 0 || _sg_mc_termination || _sg_mc_visited > 0) {
205 start_item = xbt_fifo_get_first_item(stack);
206 state = (mc_state_t)xbt_fifo_get_item_content(start_item);
207 if(state->system_state){
208 simgrid::mc::restore_snapshot(state->system_state);
209 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
210 MC_restore_communications_pattern(state);
216 /* Restore the initial state */
217 simgrid::mc::restore_snapshot(initial_global_state->snapshot);
218 /* At the moment of taking the snapshot the raw heap was set, so restoring
219 * it will set it back again, we have to unset it to continue */
221 start_item = xbt_fifo_get_last_item(stack);
223 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
224 // int n = xbt_dynar_length(incomplete_communications_pattern);
225 unsigned n = MC_smx_get_maxpid();
226 assert(n == xbt_dynar_length(incomplete_communications_pattern));
227 assert(n == xbt_dynar_length(initial_communications_pattern));
228 for (unsigned j=0; j < n ; j++) {
229 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
230 xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t)->index_comm = 0;
234 /* Traverse the stack from the state at position start and re-execute the transitions */
235 for (item = start_item;
236 item != xbt_fifo_get_first_item(stack);
237 item = xbt_fifo_get_prev_item(item)) {
239 state = (mc_state_t) xbt_fifo_get_item_content(item);
240 saved_req = MC_state_get_executed_request(state, &value);
243 /* because we got a copy of the executed request, we have to fetch the
244 real one, pointed by the request field of the issuer process */
246 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
247 req = &issuer->simcall;
249 /* Debug information */
250 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
251 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
252 XBT_DEBUG("Replay: %s (%p)", req_str, state);
256 /* TODO : handle test and testany simcalls */
257 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
258 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
259 call = MC_get_call_type(req);
261 simgrid::mc::handle_simcall(req, value);
263 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
264 MC_handle_comm_pattern(call, req, value, nullptr, 1);
266 mc_model_checker->wait_for_requests();
271 /* Update statistics */
272 mc_stats->visited_states++;
273 mc_stats->executed_transitions++;
277 XBT_DEBUG("**** End Replay ****");
280 void MC_replay_liveness(xbt_fifo_t stack)
282 xbt_fifo_item_t item;
283 simgrid::mc::Pair* pair = nullptr;
284 mc_state_t state = nullptr;
285 smx_simcall_t req = nullptr, saved_req = NULL;
286 int value, depth = 1;
289 XBT_DEBUG("**** Begin Replay ****");
291 /* Intermediate backtracking */
292 if(_sg_mc_checkpoint > 0) {
293 item = xbt_fifo_get_first_item(stack);
294 pair = (simgrid::mc::Pair*) xbt_fifo_get_item_content(item);
295 if(pair->graph_state->system_state){
296 simgrid::mc::restore_snapshot(pair->graph_state->system_state);
301 /* Restore the initial state */
302 simgrid::mc::restore_snapshot(initial_global_state->snapshot);
304 /* Traverse the stack from the initial state and re-execute the transitions */
305 for (item = xbt_fifo_get_last_item(stack);
306 item != xbt_fifo_get_first_item(stack);
307 item = xbt_fifo_get_prev_item(item)) {
309 pair = (simgrid::mc::Pair*) xbt_fifo_get_item_content(item);
311 state = (mc_state_t) pair->graph_state;
313 if (pair->exploration_started) {
315 saved_req = MC_state_get_executed_request(state, &value);
317 if (saved_req != nullptr) {
318 /* because we got a copy of the executed request, we have to fetch the
319 real one, pointed by the request field of the issuer process */
320 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
321 req = &issuer->simcall;
323 /* Debug information */
324 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
325 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
326 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
332 simgrid::mc::handle_simcall(req, value);
333 mc_model_checker->wait_for_requests();
336 /* Update statistics */
337 mc_stats->visited_pairs++;
338 mc_stats->executed_transitions++;
344 XBT_DEBUG("**** End Replay ****");
348 * \brief Dumps the contents of a model-checker's stack and shows the actual
350 * \param stack The stack to dump
352 void MC_dump_stack_safety(xbt_fifo_t stack)
354 MC_show_stack_safety(stack);
358 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != nullptr)
359 MC_state_delete(state, !state->in_visited_states ? 1 : 0);
363 void MC_show_stack_safety(xbt_fifo_t stack)
367 xbt_fifo_item_t item;
369 char *req_str = nullptr;
371 for (item = xbt_fifo_get_last_item(stack);
372 item; item = xbt_fifo_get_prev_item(item)) {
373 state = (mc_state_t)xbt_fifo_get_item_content(item);
374 req = MC_state_get_executed_request(state, &value);
376 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
377 XBT_INFO("%s", req_str);
383 void MC_show_deadlock(smx_simcall_t req)
385 /*char *req_str = nullptr; */
386 XBT_INFO("**************************");
387 XBT_INFO("*** DEAD-LOCK DETECTED ***");
388 XBT_INFO("**************************");
389 XBT_INFO("Locked request:");
390 /*req_str = simgrid::mc::request_to_string(req);
391 XBT_INFO("%s", req_str);
392 xbt_free(req_str); */
393 XBT_INFO("Counter-example execution trace:");
394 MC_dump_stack_safety(mc_stack);
395 MC_print_statistics(mc_stats);
398 void MC_show_non_termination(void){
399 XBT_INFO("******************************************");
400 XBT_INFO("*** NON-PROGRESSIVE CYCLE DETECTED ***");
401 XBT_INFO("******************************************");
402 XBT_INFO("Counter-example execution trace:");
403 MC_dump_stack_safety(mc_stack);
404 MC_print_statistics(mc_stats);
410 void show_stack_liveness(xbt_fifo_t stack)
413 simgrid::mc::Pair* pair;
414 xbt_fifo_item_t item;
416 char *req_str = nullptr;
418 for (item = xbt_fifo_get_last_item(stack);
419 item; item = xbt_fifo_get_prev_item(item)) {
420 pair = (simgrid::mc::Pair*) xbt_fifo_get_item_content(item);
421 req = MC_state_get_executed_request(pair->graph_state, &value);
422 if (req && req->call != SIMCALL_NONE) {
423 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
424 XBT_INFO("%s", req_str);
430 void dump_stack_liveness(xbt_fifo_t stack)
432 simgrid::mc::Pair* pair;
433 while ((pair = (simgrid::mc::Pair*) xbt_fifo_pop(stack)) != nullptr)
440 void MC_print_statistics(mc_stats_t stats)
442 if(_sg_mc_comms_determinism) {
443 if (!initial_global_state->recv_deterministic && initial_global_state->send_deterministic){
444 XBT_INFO("******************************************************");
445 XBT_INFO("**** Only-send-deterministic communication pattern ****");
446 XBT_INFO("******************************************************");
447 XBT_INFO("%s", initial_global_state->recv_diff);
448 }else if(!initial_global_state->send_deterministic && initial_global_state->recv_deterministic) {
449 XBT_INFO("******************************************************");
450 XBT_INFO("**** Only-recv-deterministic communication pattern ****");
451 XBT_INFO("******************************************************");
452 XBT_INFO("%s", initial_global_state->send_diff);
456 if (stats->expanded_pairs == 0) {
457 XBT_INFO("Expanded states = %lu", stats->expanded_states);
458 XBT_INFO("Visited states = %lu", stats->visited_states);
460 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
461 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
463 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
464 if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
465 fprintf(dot_output, "}\n");
468 if (initial_global_state != nullptr && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) {
469 XBT_INFO("Send-deterministic : %s", !initial_global_state->send_deterministic ? "No" : "Yes");
470 if (_sg_mc_comms_determinism)
471 XBT_INFO("Recv-deterministic : %s", !initial_global_state->recv_deterministic ? "No" : "Yes");
473 if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
474 int ret=system("free");
475 if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
479 void MC_automaton_load(const char *file)
481 if (simgrid::mc::property_automaton == nullptr)
482 simgrid::mc::property_automaton = xbt_automaton_new();
484 xbt_automaton_load(simgrid::mc::property_automaton, file);
487 // TODO, fix cross-process access (this function is not used)
488 static void MC_dump_stacks(FILE* file)
491 for (auto const& stack : mc_model_checker->process().stack_areas()) {
493 xbt_die("Fix cross-process access to the context");
494 unw_context_t * context = (unw_context_t *)stack.context;
495 fprintf(file, "Stack %i:\n", nstack);
500 unw_init_local (&c, context);
503 const char * name = !unw_get_proc_name(&c, buffer, 100, &off) ? buffer : "?";
504 #if defined(__x86_64__)
507 unw_get_reg(&c, UNW_X86_64_RIP, &rip);
508 unw_get_reg(&c, UNW_X86_64_RSP, &rsp);
509 fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
510 nframe, name, (std::uint64_t) rip, (std::uint64_t) rsp);
512 fprintf(file, " %i: %s\n", nframe, name);
515 } while(unw_step(&c));
522 double MC_process_clock_get(smx_process_t process)
524 if (simgrid::mc::processes_time.empty())
526 if (process != nullptr)
527 return simgrid::mc::processes_time[process->pid];
531 void MC_process_clock_add(smx_process_t process, double amount)
533 simgrid::mc::processes_time[process->pid] += amount;
537 void MC_report_assertion_error(void)
539 XBT_INFO("**************************");
540 XBT_INFO("*** PROPERTY NOT VALID ***");
541 XBT_INFO("**************************");
542 XBT_INFO("Counter-example execution trace:");
543 MC_record_dump_path(mc_stack);
544 MC_dump_stack_safety(mc_stack);
545 MC_print_statistics(mc_stats);
548 void MC_report_crash(int status)
550 XBT_INFO("**************************");
551 XBT_INFO("** CRASH IN THE PROGRAM **");
552 XBT_INFO("**************************");
553 if (WIFSIGNALED(status))
554 XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
555 else if (WIFEXITED(status))
556 XBT_INFO("From exit: %i", WEXITSTATUS(status));
557 if (WCOREDUMP(status))
558 XBT_INFO("A core dump was generated by the system.");
560 XBT_INFO("No core dump was generated by the system.");
561 XBT_INFO("Counter-example execution trace:");
562 MC_record_dump_path(mc_stack);
563 MC_dump_stack_safety(mc_stack);
564 MC_print_statistics(mc_stats);