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. */
24 #include "src/simix/smx_process_private.h"
27 #include <libunwind.h>
28 #include "src/mc/mc_comm_pattern.h"
29 #include "src/mc/mc_request.h"
30 #include "src/mc/mc_safety.h"
31 #include "src/mc/mc_snapshot.h"
32 #include "src/mc/mc_liveness.h"
33 #include "src/mc/mc_private.h"
34 #include "src/mc/mc_unw.h"
35 #include "src/mc/mc_smx.h"
38 #include "src/mc/mc_record.h"
39 #include "src/mc/mc_protocol.h"
40 #include "src/mc/Client.hpp"
42 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc, "Logging specific to MC (global)");
49 std::vector<double> processes_time;
55 int user_max_depth_reached = 0;
57 /* MC global data structures */
58 mc_state_t mc_current_state = nullptr;
59 char mc_replay_mode = false;
61 mc_stats_t mc_stats = nullptr;
62 mc_global_t initial_global_state = nullptr;
63 xbt_fifo_t mc_stack = nullptr;
70 xbt_automaton_t property_automaton = nullptr;
76 FILE *dot_output = nullptr;
79 /******************************* Initialisation of MC *******************************/
80 /*********************************************************************************/
82 void MC_init_dot_output()
84 dot_output = fopen(_sg_mc_dot_output_file, "w");
86 if (dot_output == nullptr) {
87 perror("Error open dot output file");
92 "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");
99 simgrid::mc::processes_time.resize(simix_process_maxpid);
101 if (_sg_mc_visited > 0 || _sg_mc_liveness || _sg_mc_termination || mc_mode == MC_MODE_SERVER) {
102 /* Those requests are handled on the client side and propagated by message
105 MC_ignore_heap(simgrid::mc::processes_time.data(),
106 simix_process_maxpid * sizeof(double));
108 smx_process_t process;
109 xbt_swag_foreach(process, simix_global->process_list)
110 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
116 /******************************* Core of MC *******************************/
117 /**************************************************************************/
121 mc_mode = MC_MODE_CLIENT;
123 simgrid::mc::Client::get()->mainLoop();
128 simgrid::mc::processes_time.clear();
134 * \brief Re-executes from the state at position start all the transitions indicated by
135 * a given model-checker stack.
136 * \param stack The stack with the transitions to execute.
137 * \param start Start index to begin the re-execution.
139 void MC_replay(xbt_fifo_t stack)
141 int value, count = 1;
143 smx_simcall_t req = nullptr, saved_req = NULL;
144 xbt_fifo_item_t item, start_item;
147 XBT_DEBUG("**** Begin Replay ****");
149 /* Intermediate backtracking */
150 if(_sg_mc_checkpoint > 0 || _sg_mc_termination || _sg_mc_visited > 0) {
151 start_item = xbt_fifo_get_first_item(stack);
152 state = (mc_state_t)xbt_fifo_get_item_content(start_item);
153 if(state->system_state){
154 simgrid::mc::restore_snapshot(state->system_state);
155 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
156 MC_restore_communications_pattern(state);
162 /* Restore the initial state */
163 simgrid::mc::restore_snapshot(initial_global_state->snapshot);
164 /* At the moment of taking the snapshot the raw heap was set, so restoring
165 * it will set it back again, we have to unset it to continue */
167 start_item = xbt_fifo_get_last_item(stack);
169 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
170 // int n = xbt_dynar_length(incomplete_communications_pattern);
171 unsigned n = MC_smx_get_maxpid();
172 assert(n == xbt_dynar_length(incomplete_communications_pattern));
173 assert(n == xbt_dynar_length(initial_communications_pattern));
174 for (unsigned j=0; j < n ; j++) {
175 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
176 xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t)->index_comm = 0;
180 /* Traverse the stack from the state at position start and re-execute the transitions */
181 for (item = start_item;
182 item != xbt_fifo_get_first_item(stack);
183 item = xbt_fifo_get_prev_item(item)) {
185 state = (mc_state_t) xbt_fifo_get_item_content(item);
186 saved_req = MC_state_get_executed_request(state, &value);
189 /* because we got a copy of the executed request, we have to fetch the
190 real one, pointed by the request field of the issuer process */
192 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
193 req = &issuer->simcall;
195 /* Debug information */
196 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
197 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
198 XBT_DEBUG("Replay: %s (%p)", req_str, state);
202 /* TODO : handle test and testany simcalls */
203 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
204 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
205 call = MC_get_call_type(req);
207 simgrid::mc::handle_simcall(req, value);
209 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
210 MC_handle_comm_pattern(call, req, value, nullptr, 1);
212 mc_model_checker->wait_for_requests();
217 /* Update statistics */
218 mc_stats->visited_states++;
219 mc_stats->executed_transitions++;
223 XBT_DEBUG("**** End Replay ****");
226 void MC_replay_liveness(xbt_fifo_t stack)
228 xbt_fifo_item_t item;
229 simgrid::mc::Pair* pair = nullptr;
230 mc_state_t state = nullptr;
231 smx_simcall_t req = nullptr, saved_req = NULL;
232 int value, depth = 1;
235 XBT_DEBUG("**** Begin Replay ****");
237 /* Intermediate backtracking */
238 if(_sg_mc_checkpoint > 0) {
239 item = xbt_fifo_get_first_item(stack);
240 pair = (simgrid::mc::Pair*) xbt_fifo_get_item_content(item);
241 if(pair->graph_state->system_state){
242 simgrid::mc::restore_snapshot(pair->graph_state->system_state);
247 /* Restore the initial state */
248 simgrid::mc::restore_snapshot(initial_global_state->snapshot);
250 /* Traverse the stack from the initial state and re-execute the transitions */
251 for (item = xbt_fifo_get_last_item(stack);
252 item != xbt_fifo_get_first_item(stack);
253 item = xbt_fifo_get_prev_item(item)) {
255 pair = (simgrid::mc::Pair*) xbt_fifo_get_item_content(item);
257 state = (mc_state_t) pair->graph_state;
259 if (pair->exploration_started) {
261 saved_req = MC_state_get_executed_request(state, &value);
263 if (saved_req != nullptr) {
264 /* because we got a copy of the executed request, we have to fetch the
265 real one, pointed by the request field of the issuer process */
266 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
267 req = &issuer->simcall;
269 /* Debug information */
270 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
271 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
272 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
278 simgrid::mc::handle_simcall(req, value);
279 mc_model_checker->wait_for_requests();
282 /* Update statistics */
283 mc_stats->visited_pairs++;
284 mc_stats->executed_transitions++;
290 XBT_DEBUG("**** End Replay ****");
294 * \brief Dumps the contents of a model-checker's stack and shows the actual
296 * \param stack The stack to dump
298 void MC_dump_stack_safety(xbt_fifo_t stack)
300 MC_show_stack_safety(stack);
304 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != nullptr)
305 MC_state_delete(state, !state->in_visited_states ? 1 : 0);
309 void MC_show_stack_safety(xbt_fifo_t stack)
313 xbt_fifo_item_t item;
315 char *req_str = nullptr;
317 for (item = xbt_fifo_get_last_item(stack);
318 item; item = xbt_fifo_get_prev_item(item)) {
319 state = (mc_state_t)xbt_fifo_get_item_content(item);
320 req = MC_state_get_executed_request(state, &value);
322 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
323 XBT_INFO("%s", req_str);
329 void MC_show_deadlock(smx_simcall_t req)
331 /*char *req_str = nullptr; */
332 XBT_INFO("**************************");
333 XBT_INFO("*** DEAD-LOCK DETECTED ***");
334 XBT_INFO("**************************");
335 XBT_INFO("Locked request:");
336 /*req_str = simgrid::mc::request_to_string(req);
337 XBT_INFO("%s", req_str);
338 xbt_free(req_str); */
339 XBT_INFO("Counter-example execution trace:");
340 MC_dump_stack_safety(mc_stack);
341 MC_print_statistics(mc_stats);
344 void MC_show_non_termination(void){
345 XBT_INFO("******************************************");
346 XBT_INFO("*** NON-PROGRESSIVE CYCLE DETECTED ***");
347 XBT_INFO("******************************************");
348 XBT_INFO("Counter-example execution trace:");
349 MC_dump_stack_safety(mc_stack);
350 MC_print_statistics(mc_stats);
356 void show_stack_liveness(xbt_fifo_t stack)
359 simgrid::mc::Pair* pair;
360 xbt_fifo_item_t item;
362 char *req_str = nullptr;
364 for (item = xbt_fifo_get_last_item(stack);
365 item; item = xbt_fifo_get_prev_item(item)) {
366 pair = (simgrid::mc::Pair*) xbt_fifo_get_item_content(item);
367 req = MC_state_get_executed_request(pair->graph_state, &value);
368 if (req && req->call != SIMCALL_NONE) {
369 req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
370 XBT_INFO("%s", req_str);
376 void dump_stack_liveness(xbt_fifo_t stack)
378 simgrid::mc::Pair* pair;
379 while ((pair = (simgrid::mc::Pair*) xbt_fifo_pop(stack)) != nullptr)
386 void MC_print_statistics(mc_stats_t stats)
388 if(_sg_mc_comms_determinism) {
389 if (!initial_global_state->recv_deterministic && initial_global_state->send_deterministic){
390 XBT_INFO("******************************************************");
391 XBT_INFO("**** Only-send-deterministic communication pattern ****");
392 XBT_INFO("******************************************************");
393 XBT_INFO("%s", initial_global_state->recv_diff);
394 }else if(!initial_global_state->send_deterministic && initial_global_state->recv_deterministic) {
395 XBT_INFO("******************************************************");
396 XBT_INFO("**** Only-recv-deterministic communication pattern ****");
397 XBT_INFO("******************************************************");
398 XBT_INFO("%s", initial_global_state->send_diff);
402 if (stats->expanded_pairs == 0) {
403 XBT_INFO("Expanded states = %lu", stats->expanded_states);
404 XBT_INFO("Visited states = %lu", stats->visited_states);
406 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
407 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
409 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
410 if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
411 fprintf(dot_output, "}\n");
414 if (initial_global_state != nullptr && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) {
415 XBT_INFO("Send-deterministic : %s", !initial_global_state->send_deterministic ? "No" : "Yes");
416 if (_sg_mc_comms_determinism)
417 XBT_INFO("Recv-deterministic : %s", !initial_global_state->recv_deterministic ? "No" : "Yes");
419 if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
420 int ret=system("free");
421 if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
425 void MC_automaton_load(const char *file)
427 if (simgrid::mc::property_automaton == nullptr)
428 simgrid::mc::property_automaton = xbt_automaton_new();
430 xbt_automaton_load(simgrid::mc::property_automaton, file);
433 // TODO, fix cross-process access (this function is not used)
434 static void MC_dump_stacks(FILE* file)
437 for (auto const& stack : mc_model_checker->process().stack_areas()) {
439 xbt_die("Fix cross-process access to the context");
440 unw_context_t * context = (unw_context_t *)stack.context;
441 fprintf(file, "Stack %i:\n", nstack);
446 unw_init_local (&c, context);
449 const char * name = !unw_get_proc_name(&c, buffer, 100, &off) ? buffer : "?";
450 #if defined(__x86_64__)
453 unw_get_reg(&c, UNW_X86_64_RIP, &rip);
454 unw_get_reg(&c, UNW_X86_64_RSP, &rsp);
455 fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
456 nframe, name, (std::uint64_t) rip, (std::uint64_t) rsp);
458 fprintf(file, " %i: %s\n", nframe, name);
461 } while(unw_step(&c));
468 double MC_process_clock_get(smx_process_t process)
470 if (simgrid::mc::processes_time.empty())
472 if (process != nullptr)
473 return simgrid::mc::processes_time[process->pid];
477 void MC_process_clock_add(smx_process_t process, double amount)
479 simgrid::mc::processes_time[process->pid] += amount;
483 void MC_report_assertion_error(void)
485 XBT_INFO("**************************");
486 XBT_INFO("*** PROPERTY NOT VALID ***");
487 XBT_INFO("**************************");
488 XBT_INFO("Counter-example execution trace:");
489 MC_record_dump_path(mc_stack);
490 MC_dump_stack_safety(mc_stack);
491 MC_print_statistics(mc_stats);
494 void MC_report_crash(int status)
496 XBT_INFO("**************************");
497 XBT_INFO("** CRASH IN THE PROGRAM **");
498 XBT_INFO("**************************");
499 if (WIFSIGNALED(status))
500 XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
501 else if (WIFEXITED(status))
502 XBT_INFO("From exit: %i", WEXITSTATUS(status));
503 if (WCOREDUMP(status))
504 XBT_INFO("A core dump was generated by the system.");
506 XBT_INFO("No core dump was generated by the system.");
507 XBT_INFO("Counter-example execution trace:");
508 MC_record_dump_path(mc_stack);
509 MC_dump_stack_safety(mc_stack);
510 MC_print_statistics(mc_stats);