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. */
16 #include <xbt/dynar.h>
17 #include <xbt/automaton.h>
30 #include "src/simix/smx_process_private.h"
33 #include <libunwind.h>
34 #include "src/mc/mc_comm_pattern.h"
35 #include "src/mc/mc_request.h"
36 #include "src/mc/mc_safety.h"
37 #include "src/mc/mc_snapshot.h"
38 #include "src/mc/mc_private.h"
39 #include "src/mc/mc_unw.h"
40 #include "src/mc/mc_smx.h"
41 #include "src/mc/Checker.hpp"
44 #include "src/mc/mc_record.h"
45 #include "src/mc/mc_protocol.h"
46 #include "src/mc/Client.hpp"
47 #include "src/mc/Transition.hpp"
49 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc, "Logging specific to MC (global)");
56 std::vector<double> processes_time;
63 /* MC global data structures */
64 simgrid::mc::State* mc_current_state = nullptr;
65 char mc_replay_mode = false;
67 mc_stats_t mc_stats = nullptr;
74 std::unique_ptr<s_mc_global_t> initial_global_state = nullptr;
75 xbt_automaton_t property_automaton = nullptr;
81 FILE *dot_output = nullptr;
84 /******************************* Initialisation of MC *******************************/
85 /*********************************************************************************/
87 void MC_init_dot_output()
89 dot_output = fopen(_sg_mc_dot_output_file, "w");
91 if (dot_output == nullptr) {
92 perror("Error open dot output file");
97 "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");
101 /******************************* Core of MC *******************************/
102 /**************************************************************************/
106 simgrid::mc::processes_time.resize(simix_process_maxpid);
107 MC_ignore_heap(simgrid::mc::processes_time.data(),
108 simgrid::mc::processes_time.size() * sizeof(simgrid::mc::processes_time[0]));
109 smx_process_t process;
110 xbt_swag_foreach(process, simix_global->process_list)
111 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
112 simgrid::mc::Client::get()->mainLoop();
113 simgrid::mc::processes_time.clear();
120 * \brief Re-executes from the state at position start all the transitions indicated by
121 * a given model-checker stack.
122 * \param stack The stack with the transitions to execute.
123 * \param start Start index to begin the re-execution.
125 void replay(std::list<std::unique_ptr<simgrid::mc::State>> const& stack)
127 XBT_DEBUG("**** Begin Replay ****");
129 /* Intermediate backtracking */
130 if(_sg_mc_checkpoint > 0 || _sg_mc_termination || _sg_mc_visited > 0) {
131 simgrid::mc::State* state = stack.back().get();
132 if (state->system_state) {
133 simgrid::mc::restore_snapshot(state->system_state);
134 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
135 MC_restore_communications_pattern(state);
141 /* Restore the initial state */
142 simgrid::mc::restore_snapshot(simgrid::mc::initial_global_state->snapshot);
143 /* At the moment of taking the snapshot the raw heap was set, so restoring
144 * it will set it back again, we have to unset it to continue */
146 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
147 // int n = xbt_dynar_length(incomplete_communications_pattern);
148 unsigned n = MC_smx_get_maxpid();
149 assert(n == xbt_dynar_length(incomplete_communications_pattern));
150 assert(n == xbt_dynar_length(initial_communications_pattern));
151 for (unsigned j=0; j < n ; j++) {
152 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
153 xbt_dynar_get_as(initial_communications_pattern, j, simgrid::mc::PatternCommunicationList*)->index_comm = 0;
159 /* Traverse the stack from the state at position start and re-execute the transitions */
160 for (std::unique_ptr<simgrid::mc::State> const& state : stack) {
161 if (state == stack.back())
164 int req_num = state->transition.argument;
165 smx_simcall_t saved_req = &state->executed_req;
168 /* because we got a copy of the executed request, we have to fetch the
169 real one, pointed by the request field of the issuer process */
171 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
172 smx_simcall_t req = &issuer->simcall;
174 /* Debug information */
175 XBT_DEBUG("Replay: %s (%p)",
176 simgrid::mc::request_to_string(
177 req, req_num, simgrid::mc::RequestType::simix).c_str(),
180 /* TODO : handle test and testany simcalls */
181 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
182 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
183 call = MC_get_call_type(req);
185 mc_model_checker->handle_simcall(state->transition);
186 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
187 MC_handle_comm_pattern(call, req, req_num, nullptr, 1);
188 mc_model_checker->wait_for_requests();
193 /* Update statistics */
194 mc_stats->visited_states++;
195 mc_stats->executed_transitions++;
199 XBT_DEBUG("**** End Replay ****");
205 void MC_show_deadlock(void)
207 XBT_INFO("**************************");
208 XBT_INFO("*** DEAD-LOCK DETECTED ***");
209 XBT_INFO("**************************");
210 XBT_INFO("Counter-example execution trace:");
211 for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
212 XBT_INFO("%s", s.c_str());
213 MC_print_statistics(mc_stats);
216 void MC_print_statistics(mc_stats_t stats)
218 if(_sg_mc_comms_determinism) {
219 if (!simgrid::mc::initial_global_state->recv_deterministic &&
220 simgrid::mc::initial_global_state->send_deterministic){
221 XBT_INFO("******************************************************");
222 XBT_INFO("**** Only-send-deterministic communication pattern ****");
223 XBT_INFO("******************************************************");
224 XBT_INFO("%s", simgrid::mc::initial_global_state->recv_diff);
225 }else if(!simgrid::mc::initial_global_state->send_deterministic &&
226 simgrid::mc::initial_global_state->recv_deterministic) {
227 XBT_INFO("******************************************************");
228 XBT_INFO("**** Only-recv-deterministic communication pattern ****");
229 XBT_INFO("******************************************************");
230 XBT_INFO("%s", simgrid::mc::initial_global_state->send_diff);
234 if (stats->expanded_pairs == 0) {
235 XBT_INFO("Expanded states = %lu", stats->expanded_states);
236 XBT_INFO("Visited states = %lu", stats->visited_states);
238 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
239 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
241 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
242 if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
243 fprintf(dot_output, "}\n");
246 if (simgrid::mc::initial_global_state != nullptr
247 && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) {
248 XBT_INFO("Send-deterministic : %s",
249 !simgrid::mc::initial_global_state->send_deterministic ? "No" : "Yes");
250 if (_sg_mc_comms_determinism)
251 XBT_INFO("Recv-deterministic : %s",
252 !simgrid::mc::initial_global_state->recv_deterministic ? "No" : "Yes");
254 if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
255 int ret=system("free");
256 if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
260 void MC_automaton_load(const char *file)
262 if (simgrid::mc::property_automaton == nullptr)
263 simgrid::mc::property_automaton = xbt_automaton_new();
265 xbt_automaton_load(simgrid::mc::property_automaton, file);
271 void dumpStack(FILE* file, unw_cursor_t cursor)
278 const char * name = !unw_get_proc_name(&cursor, buffer, 100, &off) ? buffer : "?";
282 // Demangle C++ names:
283 char* realname = abi::__cxa_demangle(name, 0, 0, &status);
285 #if defined(__x86_64__)
288 unw_get_reg(&cursor, UNW_X86_64_RIP, &rip);
289 unw_get_reg(&cursor, UNW_X86_64_RSP, &rsp);
290 fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
291 nframe, realname ? realname : name, (std::uint64_t) rip, (std::uint64_t) rsp);
293 fprintf(file, " %i: %s\n", nframe, realname ? realname : name);
298 } while(unw_step(&cursor));
304 static void MC_dump_stacks(FILE* file)
307 for (auto const& stack : mc_model_checker->process().stack_areas()) {
308 fprintf(file, "Stack %i:\n", nstack++);
310 simgrid::mc::UnwindContext context;
311 unw_context_t raw_context =
312 mc_model_checker->process().read<unw_context_t>(
313 simgrid::mc::remote((unw_context_t *)stack.context));
314 context.initialize(&mc_model_checker->process(), &raw_context);
316 unw_cursor_t cursor = context.cursor();
317 simgrid::mc::dumpStack(file, cursor);
322 double MC_process_clock_get(smx_process_t process)
324 if (simgrid::mc::processes_time.empty())
326 if (process != nullptr)
327 return simgrid::mc::processes_time[process->pid];
331 void MC_process_clock_add(smx_process_t process, double amount)
333 simgrid::mc::processes_time[process->pid] += amount;
337 void MC_report_assertion_error(void)
339 XBT_INFO("**************************");
340 XBT_INFO("*** PROPERTY NOT VALID ***");
341 XBT_INFO("**************************");
342 XBT_INFO("Counter-example execution trace:");
343 simgrid::mc::dumpRecordPath();
344 for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
345 XBT_INFO("%s", s.c_str());
346 MC_print_statistics(mc_stats);
349 void MC_report_crash(int status)
351 XBT_INFO("**************************");
352 XBT_INFO("** CRASH IN THE PROGRAM **");
353 XBT_INFO("**************************");
354 if (WIFSIGNALED(status))
355 XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
356 else if (WIFEXITED(status))
357 XBT_INFO("From exit: %i", WEXITSTATUS(status));
358 if (WCOREDUMP(status))
359 XBT_INFO("A core dump was generated by the system.");
361 XBT_INFO("No core dump was generated by the system.");
362 XBT_INFO("Counter-example execution trace:");
363 simgrid::mc::dumpRecordPath();
364 for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
365 XBT_INFO("%s", s.c_str());
366 MC_print_statistics(mc_stats);
367 XBT_INFO("Stack trace:");
368 mc_model_checker->process().dumpStack();