namespace simgrid {
namespace mc {
+static void MC_show_non_termination(void)
+{
+ XBT_INFO("******************************************");
+ XBT_INFO("*** NON-PROGRESSIVE CYCLE DETECTED ***");
+ XBT_INFO("******************************************");
+ XBT_INFO("Counter-example execution trace:");
+ for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
+ XBT_INFO("%s", s.c_str());
+ MC_print_statistics(mc_stats);
+}
+
+static int snapshot_compare(mc_state_t state1, mc_state_t state2)
+{
+ simgrid::mc::Snapshot* s1 = state1->system_state;
+ simgrid::mc::Snapshot* s2 = state2->system_state;
+ int num1 = state1->num;
+ int num2 = state2->num;
+ return snapshot_compare(num1, s1, num2, s2);
+}
+
static int is_exploration_stack_state(mc_state_t current_state){
xbt_fifo_item_t item;
return 0;
}
-static void modelcheck_safety_init(void);
-
-/**
- * \brief Initialize the DPOR exploration algorithm
- */
-static void pre_modelcheck_safety()
+RecordTrace SafetyChecker::getRecordTrace() // override
{
- simgrid::mc::visited_states.clear();
+ RecordTrace res;
- mc_state_t initial_state = MC_state_new();
+ xbt_fifo_item_t start = xbt_fifo_get_last_item(mc_stack);
+ for (xbt_fifo_item_t item = start; item; item = xbt_fifo_get_prev_item(item)) {
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Initial state");
+ // Find (pid, value):
+ mc_state_t state = (mc_state_t) xbt_fifo_get_item_content(item);
+ int value = 0;
+ smx_simcall_t saved_req = MC_state_get_executed_request(state, &value);
+ const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
+ const int pid = issuer->pid;
- /* Wait for requests (schedules processes) */
- mc_model_checker->wait_for_requests();
-
- /* Get an enabled process and insert it in the interleave set of the initial state */
- for (auto& p : mc_model_checker->process().simix_processes())
- if (simgrid::mc::process_is_enabled(&p.copy)) {
- MC_state_interleave_process(initial_state, &p.copy);
- if (simgrid::mc::reduction_mode != simgrid::mc::ReductionMode::none)
- break;
- }
+ res.push_back(RecordTraceElement(pid, value));
+ }
- xbt_fifo_unshift(mc_stack, initial_state);
+ return std::move(res);
}
+std::vector<std::string> SafetyChecker::getTextualTrace() // override
+{
+ std::vector<std::string> trace;
+ for (xbt_fifo_item_t item = xbt_fifo_get_last_item(mc_stack);
+ item; item = xbt_fifo_get_prev_item(item)) {
+ mc_state_t state = (mc_state_t)xbt_fifo_get_item_content(item);
+ int value;
+ smx_simcall_t req = MC_state_get_executed_request(state, &value);
+ if (req) {
+ char* req_str = simgrid::mc::request_to_string(
+ req, value, simgrid::mc::RequestType::executed);
+ trace.push_back(req_str);
+ xbt_free(req_str);
+ }
+ }
+ return std::move(trace);
+}
-/** \brief Model-check the application using a DFS exploration
- * with DPOR (Dynamic Partial Order Reductions)
- */
-static int modelcheck_safety(void)
+int SafetyChecker::run()
{
- modelcheck_safety_init();
+ this->init();
char *req_str = nullptr;
int value;
return SIMGRID_MC_EXIT_NON_TERMINATION;
}
- if ((visited_state = simgrid::mc::is_visited_state(next_state)) == nullptr) {
+ if (_sg_mc_visited == 0 || (visited_state = simgrid::mc::is_visited_state(next_state, true)) == nullptr) {
/* Get an enabled process and insert it in the interleave set of the next state */
for (auto& p : mc_model_checker->process().simix_processes())
if (simgrid::mc::process_is_enabled(&p.copy)) {
MC_state_interleave_process(next_state, &p.copy);
- if (simgrid::mc::reduction_mode != simgrid::mc::ReductionMode::none)
+ if (reductionMode_ != simgrid::mc::ReductionMode::none)
break;
}
/* Check for deadlocks */
if (mc_model_checker->checkDeadlock()) {
- MC_show_deadlock(nullptr);
+ MC_show_deadlock();
return SIMGRID_MC_EXIT_DEADLOCK;
}
state that executed that previous request. */
while ((state = (mc_state_t) xbt_fifo_shift(mc_stack))) {
- if (simgrid::mc::reduction_mode == simgrid::mc::ReductionMode::dpor) {
+ if (reductionMode_ == simgrid::mc::ReductionMode::dpor) {
req = MC_state_get_internal_request(state);
if (req->call == SIMCALL_MUTEX_LOCK || req->call == SIMCALL_MUTEX_TRYLOCK)
xbt_die("Mutex is currently not supported with DPOR, "
"use --cfg=model-check/reduction:none");
const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
xbt_fifo_foreach(mc_stack, item, prev_state, mc_state_t) {
- if (simgrid::mc::reduction_mode != simgrid::mc::ReductionMode::none
+ if (reductionMode_ != simgrid::mc::ReductionMode::none
&& simgrid::mc::request_depend(req, MC_state_get_internal_request(prev_state))) {
if (XBT_LOG_ISENABLED(mc_safety, xbt_log_priority_debug)) {
XBT_DEBUG("Dependent Transitions:");
return SIMGRID_MC_EXIT_SUCCESS;
}
-static void modelcheck_safety_init(void)
+void SafetyChecker::init()
{
- if(_sg_mc_termination)
- simgrid::mc::reduction_mode = simgrid::mc::ReductionMode::none;
- else if (simgrid::mc::reduction_mode == simgrid::mc::ReductionMode::unset)
- simgrid::mc::reduction_mode = simgrid::mc::ReductionMode::dpor;
- _sg_mc_safety = 1;
+ reductionMode_ = simgrid::mc::reduction_mode;
+ if( _sg_mc_termination)
+ reductionMode_ = simgrid::mc::ReductionMode::none;
+ else if (reductionMode_ == simgrid::mc::ReductionMode::unset)
+ reductionMode_ = simgrid::mc::ReductionMode::dpor;
+
if (_sg_mc_termination)
XBT_INFO("Check non progressive cycles");
else
XBT_DEBUG("Starting the safety algorithm");
- _sg_mc_safety = 1;
-
/* Create exploration stack */
mc_stack = xbt_fifo_new();
- pre_modelcheck_safety();
+ simgrid::mc::visited_states.clear();
+
+ mc_state_t initial_state = MC_state_new();
+
+ XBT_DEBUG("**************************************************");
+ XBT_DEBUG("Initial state");
+
+ /* Wait for requests (schedules processes) */
+ mc_model_checker->wait_for_requests();
+
+ /* Get an enabled process and insert it in the interleave set of the initial state */
+ for (auto& p : mc_model_checker->process().simix_processes())
+ if (simgrid::mc::process_is_enabled(&p.copy)) {
+ MC_state_interleave_process(initial_state, &p.copy);
+ if (reductionMode_ != simgrid::mc::ReductionMode::none)
+ break;
+ }
+
+ xbt_fifo_unshift(mc_stack, initial_state);
/* Save the initial state */
initial_global_state = xbt_new0(s_mc_global_t, 1);
SafetyChecker::~SafetyChecker()
{
}
-
-int SafetyChecker::run()
-{
- return simgrid::mc::modelcheck_safety();
-}
}
}
