#include <cstddef>
#include <cstdint>
+#include <cxxabi.h>
+
#include <vector>
+#include <xbt/dynar.h>
+#include <xbt/automaton.h>
+#include <xbt/swag.h>
+
#include "mc_base.h"
#include "mc/mc.h"
#include <sys/time.h>
#endif
-#include "src/simix/smx_process_private.h"
+#include "src/simix/ActorImpl.hpp"
#if HAVE_MC
#include <libunwind.h>
#include "src/mc/mc_request.h"
#include "src/mc/mc_safety.h"
#include "src/mc/mc_snapshot.h"
-#include "src/mc/mc_liveness.h"
#include "src/mc/mc_private.h"
#include "src/mc/mc_unw.h"
#include "src/mc/mc_smx.h"
+#include "src/mc/Checker.hpp"
#endif
#include "src/mc/mc_record.h"
#include "src/mc/mc_protocol.h"
#include "src/mc/Client.hpp"
+#include "src/mc/Transition.hpp"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc, "Logging specific to MC (global)");
-e_mc_mode_t mc_mode;
-
namespace simgrid {
namespace mc {
}
#if HAVE_MC
-int user_max_depth_reached = 0;
-
-/* MC global data structures */
-mc_state_t mc_current_state = nullptr;
-char mc_replay_mode = false;
-
-mc_stats_t mc_stats = nullptr;
-mc_global_t initial_global_state = nullptr;
-xbt_fifo_t mc_stack = nullptr;
/* Liveness */
FILE *dot_output = nullptr;
-/******************************* Initialisation of MC *******************************/
+/******************************* Initialization of MC *******************************/
/*********************************************************************************/
void MC_init_dot_output()
void MC_run()
{
- simgrid::mc::processes_time.resize(simix_process_maxpid);
+ simgrid::mc::processes_time.resize(SIMIX_process_get_maxpid());
MC_ignore_heap(simgrid::mc::processes_time.data(),
simgrid::mc::processes_time.size() * sizeof(simgrid::mc::processes_time[0]));
smx_process_t process;
simgrid::mc::processes_time.clear();
}
-/**
- * \brief Re-executes from the state at position start all the transitions indicated by
- * a given model-checker stack.
- * \param stack The stack with the transitions to execute.
- * \param start Start index to begin the re-execution.
- */
-void MC_replay(xbt_fifo_t stack)
+void MC_show_deadlock(void)
{
- int value, count = 1;
- char *req_str;
- smx_simcall_t req = nullptr, saved_req = NULL;
- xbt_fifo_item_t item, start_item;
- mc_state_t state;
-
- XBT_DEBUG("**** Begin Replay ****");
-
- /* Intermediate backtracking */
- if(_sg_mc_checkpoint > 0 || _sg_mc_termination || _sg_mc_visited > 0) {
- start_item = xbt_fifo_get_first_item(stack);
- state = (mc_state_t)xbt_fifo_get_item_content(start_item);
- if(state->system_state){
- simgrid::mc::restore_snapshot(state->system_state);
- if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
- MC_restore_communications_pattern(state);
- return;
- }
- }
-
-
- /* Restore the initial state */
- simgrid::mc::restore_snapshot(initial_global_state->snapshot);
- /* At the moment of taking the snapshot the raw heap was set, so restoring
- * it will set it back again, we have to unset it to continue */
-
- start_item = xbt_fifo_get_last_item(stack);
-
- if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
- // int n = xbt_dynar_length(incomplete_communications_pattern);
- unsigned n = MC_smx_get_maxpid();
- assert(n == xbt_dynar_length(incomplete_communications_pattern));
- assert(n == xbt_dynar_length(initial_communications_pattern));
- for (unsigned j=0; j < n ; j++) {
- xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
- xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t)->index_comm = 0;
- }
- }
-
- /* Traverse the stack from the state at position start and re-execute the transitions */
- for (item = start_item;
- item != xbt_fifo_get_first_item(stack);
- item = xbt_fifo_get_prev_item(item)) {
-
- state = (mc_state_t) xbt_fifo_get_item_content(item);
- saved_req = MC_state_get_executed_request(state, &value);
-
- if (saved_req) {
- /* because we got a copy of the executed request, we have to fetch the
- real one, pointed by the request field of the issuer process */
-
- const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
- req = &issuer->simcall;
-
- /* Debug information */
- if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
- req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::simix);
- XBT_DEBUG("Replay: %s (%p)", req_str, state);
- xbt_free(req_str);
- }
-
- /* TODO : handle test and testany simcalls */
- e_mc_call_type_t call = MC_CALL_TYPE_NONE;
- if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
- call = MC_get_call_type(req);
-
- simgrid::mc::handle_simcall(req, value);
-
- if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
- MC_handle_comm_pattern(call, req, value, nullptr, 1);
-
- mc_model_checker->wait_for_requests();
-
- count++;
- }
-
- /* Update statistics */
- mc_stats->visited_states++;
- mc_stats->executed_transitions++;
-
- }
-
- XBT_DEBUG("**** End Replay ****");
+ XBT_INFO("**************************");
+ XBT_INFO("*** DEAD-LOCK DETECTED ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Counter-example execution trace:");
+ for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
+ XBT_INFO("%s", s.c_str());
+ simgrid::mc::session->logState();
}
-/**
- * \brief Dumps the contents of a model-checker's stack and shows the actual
- * execution trace
- * \param stack The stack to dump
- */
-void MC_dump_stack_safety(xbt_fifo_t stack)
+void MC_automaton_load(const char *file)
{
- MC_show_stack_safety(stack);
-
- mc_state_t state;
+ if (simgrid::mc::property_automaton == nullptr)
+ simgrid::mc::property_automaton = xbt_automaton_new();
- while ((state = (mc_state_t) xbt_fifo_pop(stack)) != nullptr)
- MC_state_delete(state, !state->in_visited_states ? 1 : 0);
+ xbt_automaton_load(simgrid::mc::property_automaton, file);
}
+namespace simgrid {
+namespace mc {
-void MC_show_stack_safety(xbt_fifo_t stack)
+void dumpStack(FILE* file, unw_cursor_t cursor)
{
- int value;
- mc_state_t state;
- xbt_fifo_item_t item;
- smx_simcall_t req;
- char *req_str = nullptr;
-
- for (item = xbt_fifo_get_last_item(stack);
- item; item = xbt_fifo_get_prev_item(item)) {
- state = (mc_state_t)xbt_fifo_get_item_content(item);
- req = MC_state_get_executed_request(state, &value);
- if (req) {
- req_str = simgrid::mc::request_to_string(req, value, simgrid::mc::RequestType::executed);
- XBT_INFO("%s", req_str);
- xbt_free(req_str);
- }
- }
-}
+ int nframe = 0;
+ char buffer[100];
-void MC_show_deadlock(smx_simcall_t req)
-{
- /*char *req_str = nullptr; */
- XBT_INFO("**************************");
- XBT_INFO("*** DEAD-LOCK DETECTED ***");
- XBT_INFO("**************************");
- XBT_INFO("Locked request:");
- /*req_str = simgrid::mc::request_to_string(req);
- XBT_INFO("%s", req_str);
- xbt_free(req_str); */
- XBT_INFO("Counter-example execution trace:");
- MC_dump_stack_safety(mc_stack);
- MC_print_statistics(mc_stats);
-}
+ unw_word_t off;
+ do {
+ const char * name = !unw_get_proc_name(&cursor, buffer, 100, &off) ? buffer : "?";
-void MC_show_non_termination(void){
- XBT_INFO("******************************************");
- XBT_INFO("*** NON-PROGRESSIVE CYCLE DETECTED ***");
- XBT_INFO("******************************************");
- XBT_INFO("Counter-example execution trace:");
- MC_dump_stack_safety(mc_stack);
- MC_print_statistics(mc_stats);
-}
+ int status;
-void MC_print_statistics(mc_stats_t stats)
-{
- if(_sg_mc_comms_determinism) {
- if (!initial_global_state->recv_deterministic && initial_global_state->send_deterministic){
- XBT_INFO("******************************************************");
- XBT_INFO("**** Only-send-deterministic communication pattern ****");
- XBT_INFO("******************************************************");
- XBT_INFO("%s", initial_global_state->recv_diff);
- }else if(!initial_global_state->send_deterministic && initial_global_state->recv_deterministic) {
- XBT_INFO("******************************************************");
- XBT_INFO("**** Only-recv-deterministic communication pattern ****");
- XBT_INFO("******************************************************");
- XBT_INFO("%s", initial_global_state->send_diff);
- }
- }
+ // Unmangle C++ names:
+ char* realname = abi::__cxa_demangle(name, 0, 0, &status);
- if (stats->expanded_pairs == 0) {
- XBT_INFO("Expanded states = %lu", stats->expanded_states);
- XBT_INFO("Visited states = %lu", stats->visited_states);
- } else {
- XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
- XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
- }
- XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
- if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) {
- fprintf(dot_output, "}\n");
- fclose(dot_output);
- }
- if (initial_global_state != nullptr && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) {
- XBT_INFO("Send-deterministic : %s", !initial_global_state->send_deterministic ? "No" : "Yes");
- if (_sg_mc_comms_determinism)
- XBT_INFO("Recv-deterministic : %s", !initial_global_state->recv_deterministic ? "No" : "Yes");
- }
- if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
- int ret=system("free");
- if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
- }
-}
+#if defined(__x86_64__)
+ unw_word_t rip = 0;
+ unw_word_t rsp = 0;
+ unw_get_reg(&cursor, UNW_X86_64_RIP, &rip);
+ unw_get_reg(&cursor, UNW_X86_64_RSP, &rsp);
+ fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
+ nframe, realname ? realname : name, (std::uint64_t) rip, (std::uint64_t) rsp);
+#else
+ fprintf(file, " %i: %s\n", nframe, realname ? realname : name);
+#endif
-void MC_automaton_load(const char *file)
-{
- if (simgrid::mc::property_automaton == nullptr)
- simgrid::mc::property_automaton = xbt_automaton_new();
+ free(realname);
+ ++nframe;
+ } while(unw_step(&cursor));
+}
- xbt_automaton_load(simgrid::mc::property_automaton, file);
+}
}
-// TODO, fix cross-process access (this function is not used)
static void MC_dump_stacks(FILE* file)
{
int nstack = 0;
for (auto const& stack : mc_model_checker->process().stack_areas()) {
-
- fprintf(file, "Stack %i:\n", nstack);
-
- int nframe = 0;
- char buffer[100];
+ fprintf(file, "Stack %i:\n", nstack++);
simgrid::mc::UnwindContext context;
unw_context_t raw_context =
- mc_model_checker->process().read<unw_context_t>(
+ (unw_context_t) mc_model_checker->process().read<unw_context_t>(
simgrid::mc::remote((unw_context_t *)stack.context));
context.initialize(&mc_model_checker->process(), &raw_context);
unw_cursor_t cursor = context.cursor();
-
- unw_word_t off;
- do {
- const char * name = !unw_get_proc_name(&cursor, buffer, 100, &off) ? buffer : "?";
-#if defined(__x86_64__)
- unw_word_t rip = 0;
- unw_word_t rsp = 0;
- unw_get_reg(&cursor, UNW_X86_64_RIP, &rip);
- unw_get_reg(&cursor, UNW_X86_64_RSP, &rsp);
- fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
- nframe, name, (std::uint64_t) rip, (std::uint64_t) rsp);
-#else
- fprintf(file, " %i: %s\n", nframe, name);
-#endif
- ++nframe;
- } while(unw_step(&cursor));
-
- ++nstack;
+ simgrid::mc::dumpStack(file, cursor);
}
}
#endif
{
simgrid::mc::processes_time[process->pid] += amount;
}
-
-#if HAVE_MC
-void MC_report_assertion_error(void)
-{
- XBT_INFO("**************************");
- XBT_INFO("*** PROPERTY NOT VALID ***");
- XBT_INFO("**************************");
- XBT_INFO("Counter-example execution trace:");
- MC_record_dump_path(mc_stack);
- MC_dump_stack_safety(mc_stack);
- MC_print_statistics(mc_stats);
-}
-
-void MC_report_crash(int status)
-{
- XBT_INFO("**************************");
- XBT_INFO("** CRASH IN THE PROGRAM **");
- XBT_INFO("**************************");
- if (WIFSIGNALED(status))
- XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
- else if (WIFEXITED(status))
- XBT_INFO("From exit: %i", WEXITSTATUS(status));
- if (WCOREDUMP(status))
- XBT_INFO("A core dump was generated by the system.");
- else
- XBT_INFO("No core dump was generated by the system.");
- XBT_INFO("Counter-example execution trace:");
- MC_record_dump_path(mc_stack);
- MC_dump_stack_safety(mc_stack);
- MC_print_statistics(mc_stats);
-}
-
-#endif
