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. */
26 #include "src/simix/smx_process_private.h"
29 #include <libunwind.h>
30 #include "src/mc/mc_comm_pattern.h"
31 #include "src/mc/mc_request.h"
32 #include "src/mc/mc_safety.h"
33 #include "src/mc/mc_snapshot.h"
34 #include "src/mc/mc_private.h"
35 #include "src/mc/mc_unw.h"
36 #include "src/mc/mc_smx.h"
37 #include "src/mc/Checker.hpp"
40 #include "src/mc/mc_record.h"
41 #include "src/mc/mc_protocol.h"
42 #include "src/mc/Client.hpp"
44 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc, "Logging specific to MC (global)");
51 std::vector<double> processes_time;
58 /* MC global data structures */
59 simgrid::mc::State* mc_current_state = nullptr;
60 char mc_replay_mode = false;
62 mc_stats_t mc_stats = nullptr;
69 std::unique_ptr<s_mc_global_t> initial_global_state = 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");
96 /******************************* Core of MC *******************************/
97 /**************************************************************************/
101 simgrid::mc::processes_time.resize(simix_process_maxpid);
102 MC_ignore_heap(simgrid::mc::processes_time.data(),
103 simgrid::mc::processes_time.size() * sizeof(simgrid::mc::processes_time[0]));
104 smx_process_t process;
105 xbt_swag_foreach(process, simix_global->process_list)
106 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
107 simgrid::mc::Client::get()->mainLoop();
108 simgrid::mc::processes_time.clear();
115 * \brief Re-executes from the state at position start all the transitions indicated by
116 * a given model-checker stack.
117 * \param stack The stack with the transitions to execute.
118 * \param start Start index to begin the re-execution.
120 void replay(std::list<std::unique_ptr<simgrid::mc::State>> const& stack)
122 XBT_DEBUG("**** Begin Replay ****");
124 /* Intermediate backtracking */
125 if(_sg_mc_checkpoint > 0 || _sg_mc_termination || _sg_mc_visited > 0) {
126 simgrid::mc::State* state = stack.back().get();
127 if (state->system_state) {
128 simgrid::mc::restore_snapshot(state->system_state);
129 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
130 MC_restore_communications_pattern(state);
136 /* Restore the initial state */
137 simgrid::mc::restore_snapshot(simgrid::mc::initial_global_state->snapshot);
138 /* At the moment of taking the snapshot the raw heap was set, so restoring
139 * it will set it back again, we have to unset it to continue */
141 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
142 // int n = xbt_dynar_length(incomplete_communications_pattern);
143 unsigned n = MC_smx_get_maxpid();
144 assert(n == xbt_dynar_length(incomplete_communications_pattern));
145 assert(n == xbt_dynar_length(initial_communications_pattern));
146 for (unsigned j=0; j < n ; j++) {
147 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
148 xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t)->index_comm = 0;
154 /* Traverse the stack from the state at position start and re-execute the transitions */
155 for (std::unique_ptr<simgrid::mc::State> const& state : stack) {
156 if (state == stack.back())
160 smx_simcall_t saved_req = MC_state_get_executed_request(state.get(), &value);
163 /* because we got a copy of the executed request, we have to fetch the
164 real one, pointed by the request field of the issuer process */
166 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
167 smx_simcall_t req = &issuer->simcall;
169 /* Debug information */
170 XBT_DEBUG("Replay: %s (%p)",
171 simgrid::mc::request_to_string(
172 req, value, simgrid::mc::RequestType::simix).c_str(),
175 /* TODO : handle test and testany simcalls */
176 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
177 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
178 call = MC_get_call_type(req);
180 simgrid::mc::handle_simcall(req, value);
182 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
183 MC_handle_comm_pattern(call, req, value, nullptr, 1);
185 mc_model_checker->wait_for_requests();
190 /* Update statistics */
191 mc_stats->visited_states++;
192 mc_stats->executed_transitions++;
196 XBT_DEBUG("**** End Replay ****");
202 void MC_show_deadlock(void)
204 XBT_INFO("**************************");
205 XBT_INFO("*** DEAD-LOCK DETECTED ***");
206 XBT_INFO("**************************");
207 XBT_INFO("Counter-example execution trace:");
208 for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
209 XBT_INFO("%s", s.c_str());
210 MC_print_statistics(mc_stats);
213 void MC_print_statistics(mc_stats_t stats)
215 if(_sg_mc_comms_determinism) {
216 if (!simgrid::mc::initial_global_state->recv_deterministic &&
217 simgrid::mc::initial_global_state->send_deterministic){
218 XBT_INFO("******************************************************");
219 XBT_INFO("**** Only-send-deterministic communication pattern ****");
220 XBT_INFO("******************************************************");
221 XBT_INFO("%s", simgrid::mc::initial_global_state->recv_diff);
222 }else if(!simgrid::mc::initial_global_state->send_deterministic &&
223 simgrid::mc::initial_global_state->recv_deterministic) {
224 XBT_INFO("******************************************************");
225 XBT_INFO("**** Only-recv-deterministic communication pattern ****");
226 XBT_INFO("******************************************************");
227 XBT_INFO("%s", simgrid::mc::initial_global_state->send_diff);
231 if (stats->expanded_pairs == 0) {
232 XBT_INFO("Expanded states = %lu", stats->expanded_states);
233 XBT_INFO("Visited states = %lu", stats->visited_states);
235 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
236 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
238 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
239 if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
240 fprintf(dot_output, "}\n");
243 if (simgrid::mc::initial_global_state != nullptr
244 && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) {
245 XBT_INFO("Send-deterministic : %s",
246 !simgrid::mc::initial_global_state->send_deterministic ? "No" : "Yes");
247 if (_sg_mc_comms_determinism)
248 XBT_INFO("Recv-deterministic : %s",
249 !simgrid::mc::initial_global_state->recv_deterministic ? "No" : "Yes");
251 if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
252 int ret=system("free");
253 if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
257 void MC_automaton_load(const char *file)
259 if (simgrid::mc::property_automaton == nullptr)
260 simgrid::mc::property_automaton = xbt_automaton_new();
262 xbt_automaton_load(simgrid::mc::property_automaton, file);
268 void dumpStack(FILE* file, unw_cursor_t cursor)
275 const char * name = !unw_get_proc_name(&cursor, buffer, 100, &off) ? buffer : "?";
279 // Demangle C++ names:
280 char* realname = abi::__cxa_demangle(name, 0, 0, &status);
282 #if defined(__x86_64__)
285 unw_get_reg(&cursor, UNW_X86_64_RIP, &rip);
286 unw_get_reg(&cursor, UNW_X86_64_RSP, &rsp);
287 fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
288 nframe, realname ? realname : name, (std::uint64_t) rip, (std::uint64_t) rsp);
290 fprintf(file, " %i: %s\n", nframe, realname ? realname : name);
295 } while(unw_step(&cursor));
301 static void MC_dump_stacks(FILE* file)
304 for (auto const& stack : mc_model_checker->process().stack_areas()) {
305 fprintf(file, "Stack %i:\n", nstack++);
307 simgrid::mc::UnwindContext context;
308 unw_context_t raw_context =
309 mc_model_checker->process().read<unw_context_t>(
310 simgrid::mc::remote((unw_context_t *)stack.context));
311 context.initialize(&mc_model_checker->process(), &raw_context);
313 unw_cursor_t cursor = context.cursor();
314 simgrid::mc::dumpStack(file, cursor);
319 double MC_process_clock_get(smx_process_t process)
321 if (simgrid::mc::processes_time.empty())
323 if (process != nullptr)
324 return simgrid::mc::processes_time[process->pid];
328 void MC_process_clock_add(smx_process_t process, double amount)
330 simgrid::mc::processes_time[process->pid] += amount;
334 void MC_report_assertion_error(void)
336 XBT_INFO("**************************");
337 XBT_INFO("*** PROPERTY NOT VALID ***");
338 XBT_INFO("**************************");
339 XBT_INFO("Counter-example execution trace:");
340 simgrid::mc::dumpRecordPath();
341 for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
342 XBT_INFO("%s", s.c_str());
343 MC_print_statistics(mc_stats);
346 void MC_report_crash(int status)
348 XBT_INFO("**************************");
349 XBT_INFO("** CRASH IN THE PROGRAM **");
350 XBT_INFO("**************************");
351 if (WIFSIGNALED(status))
352 XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
353 else if (WIFEXITED(status))
354 XBT_INFO("From exit: %i", WEXITSTATUS(status));
355 if (WCOREDUMP(status))
356 XBT_INFO("A core dump was generated by the system.");
358 XBT_INFO("No core dump was generated by the system.");
359 XBT_INFO("Counter-example execution trace:");
360 simgrid::mc::dumpRecordPath();
361 for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
362 XBT_INFO("%s", s.c_str());
363 MC_print_statistics(mc_stats);
364 XBT_INFO("Stack trace:");
365 mc_model_checker->process().dumpStack();