1 /* Copyright (c) 2008-2014. 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. */
17 #include "simgrid/sg_config.h"
18 #include "../surf/surf_private.h"
19 #include "../simix/smx_private.h"
21 #include "xbt/automaton.h"
25 #include <libunwind.h>
26 #include <xbt/mmalloc.h>
28 #include "../xbt/mmalloc/mmprivate.h"
29 #include "mc_object_info.h"
30 #include "mc_comm_pattern.h"
31 #include "mc_request.h"
32 #include "mc_safety.h"
33 #include "mc_memory_map.h"
34 #include "mc_snapshot.h"
35 #include "mc_liveness.h"
36 #include "mc_private.h"
40 #include "mc_record.h"
41 #include "mc_protocol.h"
42 #include "mc_client.h"
44 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
45 "Logging specific to MC (global)");
49 double *mc_time = NULL;
52 int user_max_depth_reached = 0;
54 /* MC global data structures */
55 mc_state_t mc_current_state = NULL;
56 char mc_replay_mode = FALSE;
58 __thread mc_comparison_times_t mc_comp_times = NULL;
59 __thread double mc_snapshot_comparison_time;
60 mc_stats_t mc_stats = NULL;
61 mc_global_t initial_global_state = NULL;
62 xbt_fifo_t mc_stack = NULL;
65 xbt_automaton_t _mc_property_automaton = NULL;
68 FILE *dot_output = NULL;
69 const char *colors[13];
72 /******************************* Initialisation of MC *******************************/
73 /*********************************************************************************/
75 static void MC_init_dot_output()
76 { /* FIXME : more colors */
81 colors[3] = "goldenrod";
84 colors[6] = "magenta";
85 colors[7] = "turquoise4";
87 colors[9] = "forestgreen";
88 colors[10] = "hotpink";
89 colors[11] = "lightblue";
92 dot_output = fopen(_sg_mc_dot_output_file, "w");
94 if (dot_output == NULL) {
95 perror("Error open dot output file");
100 "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");
106 MC_init_pid(getpid(), -1);
109 void MC_init_pid(pid_t pid, int socket)
111 if (mc_mode == MC_MODE_NONE) {
112 if (getenv(MC_ENV_SOCKET_FD)) {
113 mc_mode = MC_MODE_CLIENT;
115 mc_mode = MC_MODE_STANDALONE;
119 mc_time = xbt_new0(double, simix_process_maxpid);
121 /* Initialize the data structures that must be persistent across every
122 iteration of the model-checker (in RAW memory) */
124 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
126 mc_model_checker = MC_model_checker_new(pid, socket);
128 mc_comp_times = xbt_new0(s_mc_comparison_times_t, 1);
130 /* Initialize statistics */
131 mc_stats = xbt_new0(s_mc_stats_t, 1);
132 mc_stats->state_size = 1;
134 if ((_sg_mc_dot_output_file != NULL) && (_sg_mc_dot_output_file[0] != '\0'))
135 MC_init_dot_output();
138 //parmap = xbt_parmap_mc_new(xbt_os_get_numcores(), XBT_PARMAP_DEFAULT);
142 if (_sg_mc_visited > 0 || _sg_mc_liveness) {
143 /* Ignore some variables from xbt/ex.h used by exception e for stacks comparison */
144 MC_ignore_local_variable("e", "*");
145 MC_ignore_local_variable("__ex_cleanup", "*");
146 MC_ignore_local_variable("__ex_mctx_en", "*");
147 MC_ignore_local_variable("__ex_mctx_me", "*");
148 MC_ignore_local_variable("__xbt_ex_ctx_ptr", "*");
149 MC_ignore_local_variable("_log_ev", "*");
150 MC_ignore_local_variable("_throw_ctx", "*");
151 MC_ignore_local_variable("ctx", "*");
153 MC_ignore_local_variable("self", "simcall_BODY_mc_snapshot");
154 MC_ignore_local_variable("next_cont"
155 "ext", "smx_ctx_sysv_suspend_serial");
156 MC_ignore_local_variable("i", "smx_ctx_sysv_suspend_serial");
158 /* Ignore local variable about time used for tracing */
159 MC_ignore_local_variable("start_time", "*");
162 MC_ignore_global_variable("mc_model_checker");
163 MC_ignore_global_variable("initial_communications_pattern");
164 MC_ignore_global_variable("incomplete_communications_pattern");
165 MC_ignore_global_variable("nb_comm_pattern");
167 /* MC __thread variables: */
168 MC_ignore_global_variable("mc_diff_info");
169 MC_ignore_global_variable("mc_comp_times");
170 MC_ignore_global_variable("mc_snapshot_comparison_time");
172 /* This MC state is used in MC replay as well: */
173 MC_ignore_global_variable("mc_time");
175 /* Static variable used for tracing */
176 MC_ignore_global_variable("counter");
179 MC_ignore_global_variable("smx_total_comms");
181 if (mc_mode == MC_MODE_STANDALONE || mc_mode == MC_MODE_CLIENT) {
182 /* Those requests are handled on the client side and propagated by message
185 MC_ignore_heap(mc_time, simix_process_maxpid * sizeof(double));
187 smx_process_t process;
188 xbt_swag_foreach(process, simix_global->process_list) {
189 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
194 mmalloc_set_current_heap(heap);
196 if (mc_mode == MC_MODE_CLIENT) {
197 // This will move somehwere else:
198 MC_client_handle_messages();
203 /******************************* Core of MC *******************************/
204 /**************************************************************************/
206 static void MC_modelcheck_comm_determinism_init(void)
210 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
212 /* Create exploration stack */
213 mc_stack = xbt_fifo_new();
217 MC_pre_modelcheck_comm_determinism();
220 initial_global_state = xbt_new0(s_mc_global_t, 1);
221 initial_global_state->snapshot = MC_take_snapshot(0);
222 initial_global_state->initial_communications_pattern_done = 0;
223 initial_global_state->comm_deterministic = 1;
224 initial_global_state->send_deterministic = 1;
227 MC_modelcheck_comm_determinism();
229 mmalloc_set_current_heap(heap);
232 static void MC_modelcheck_safety_init(void)
238 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
240 /* Create exploration stack */
241 mc_stack = xbt_fifo_new();
245 MC_pre_modelcheck_safety();
248 /* Save the initial state */
249 initial_global_state = xbt_new0(s_mc_global_t, 1);
250 initial_global_state->snapshot = MC_take_snapshot(0);
253 MC_modelcheck_safety();
255 mmalloc_set_current_heap(heap);
261 static void MC_modelcheck_liveness_init()
267 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
269 /* Create exploration stack */
270 mc_stack = xbt_fifo_new();
272 /* Create the initial state */
273 initial_global_state = xbt_new0(s_mc_global_t, 1);
277 MC_pre_modelcheck_liveness();
280 MC_print_statistics(mc_stats);
283 mmalloc_set_current_heap(heap);
287 void MC_do_the_modelcheck_for_real()
290 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
291 XBT_INFO("Check communication determinism");
292 MC_modelcheck_comm_determinism_init();
293 } else if (!_sg_mc_property_file || _sg_mc_property_file[0] == '\0') {
294 if (mc_reduce_kind == e_mc_reduce_unset)
295 mc_reduce_kind = e_mc_reduce_dpor;
296 XBT_INFO("Check a safety property");
297 MC_modelcheck_safety_init();
299 if (mc_reduce_kind == e_mc_reduce_unset)
300 mc_reduce_kind = e_mc_reduce_none;
301 XBT_INFO("Check the liveness property %s", _sg_mc_property_file);
302 MC_automaton_load(_sg_mc_property_file);
303 MC_modelcheck_liveness_init();
316 int MC_deadlock_check()
318 if (mc_mode == MC_MODE_SERVER) {
320 if ((res = MC_protocol_send_simple_message(mc_model_checker->process.socket,
321 MC_MESSAGE_DEADLOCK_CHECK)))
322 xbt_die("Could not check deadlock state");
323 s_mc_int_message_t message;
324 ssize_t s = MC_receive_message(mc_model_checker->process.socket, &message, sizeof(message));
326 xbt_die("Could not receive message");
327 else if (s != sizeof(message) || message.type != MC_MESSAGE_DEADLOCK_CHECK_REPLY) {
328 xbt_die("Unexpected message, expected MC_MESSAGE_DEADLOCK_CHECK_REPLY %i %i vs %i %i",
329 (int) s, (int) message.type, (int) sizeof(message), (int) MC_MESSAGE_DEADLOCK_CHECK_REPLY
333 return message.value;
336 int deadlock = FALSE;
337 smx_process_t process;
338 if (xbt_swag_size(simix_global->process_list)) {
340 MC_EACH_SIMIX_PROCESS(process,
341 if (MC_process_is_enabled(process)) {
350 void handle_comm_pattern(e_mc_call_type_t call_type, smx_simcall_t req, int value, xbt_dynar_t pattern, int backtracking) {
353 case MC_CALL_TYPE_NONE:
355 case MC_CALL_TYPE_SEND:
356 case MC_CALL_TYPE_RECV:
357 get_comm_pattern(pattern, req, call_type);
359 case MC_CALL_TYPE_WAIT:
360 case MC_CALL_TYPE_WAITANY:
362 smx_synchro_t current_comm = NULL;
363 if (call_type == MC_CALL_TYPE_WAIT)
364 current_comm = simcall_comm_wait__get__comm(req);
366 current_comm = xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value, smx_synchro_t);
367 // First wait only must be considered:
368 if (current_comm->comm.refcount == 1)
369 complete_comm_pattern(pattern, current_comm, backtracking);
373 xbt_die("Unexpected call type %i", (int)call_type);
378 static void MC_restore_communications_pattern(mc_state_t state) {
379 mc_list_comm_pattern_t list_process_comm;
380 unsigned int cursor, cursor2;
381 xbt_dynar_foreach(initial_communications_pattern, cursor, list_process_comm){
382 list_process_comm->index_comm = (int)xbt_dynar_get_as(state->index_comm, cursor, int);
384 mc_comm_pattern_t comm;
386 xbt_dynar_t initial_incomplete_process_comms, incomplete_process_comms;
387 for(int i=0; i<simix_process_maxpid; i++){
388 initial_incomplete_process_comms = xbt_dynar_get_as(incomplete_communications_pattern, i, xbt_dynar_t);
389 xbt_dynar_reset(initial_incomplete_process_comms);
390 incomplete_process_comms = xbt_dynar_get_as(state->incomplete_comm_pattern, i, xbt_dynar_t);
391 xbt_dynar_foreach(incomplete_process_comms, cursor2, comm) {
392 mc_comm_pattern_t copy_comm = xbt_new0(s_mc_comm_pattern_t, 1);
393 copy_comm->index = comm->index;
394 copy_comm->type = comm->type;
395 copy_comm->comm = comm->comm;
396 copy_comm->rdv = strdup(comm->rdv);
397 copy_comm->data_size = -1;
398 copy_comm->data = NULL;
399 if(comm->type == SIMIX_COMM_SEND){
400 copy_comm->src_proc = comm->src_proc;
401 copy_comm->src_host = comm->src_host;
402 if(comm->data != NULL){
403 copy_comm->data_size = comm->data_size;
404 copy_comm->data = xbt_malloc0(comm->data_size);
405 memcpy(copy_comm->data, comm->data, comm->data_size);
408 copy_comm->dst_proc = comm->dst_proc;
409 copy_comm->dst_host = comm->dst_host;
411 xbt_dynar_push(initial_incomplete_process_comms, ©_comm);
417 * \brief Re-executes from the state at position start all the transitions indicated by
418 * a given model-checker stack.
419 * \param stack The stack with the transitions to execute.
420 * \param start Start index to begin the re-execution.
422 void MC_replay(xbt_fifo_t stack)
424 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
426 int value, count = 1, j;
428 smx_simcall_t req = NULL, saved_req = NULL;
429 xbt_fifo_item_t item, start_item;
432 XBT_DEBUG("**** Begin Replay ****");
434 /* Intermediate backtracking */
435 if(_sg_mc_checkpoint > 0) {
436 start_item = xbt_fifo_get_first_item(stack);
437 state = (mc_state_t)xbt_fifo_get_item_content(start_item);
438 if(state->system_state){
439 MC_restore_snapshot(state->system_state);
440 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
441 MC_restore_communications_pattern(state);
448 /* Restore the initial state */
449 MC_restore_snapshot(initial_global_state->snapshot);
450 /* At the moment of taking the snapshot the raw heap was set, so restoring
451 * it will set it back again, we have to unset it to continue */
454 start_item = xbt_fifo_get_last_item(stack);
458 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
459 for (j=0; j<simix_process_maxpid; j++) {
460 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
461 ((mc_list_comm_pattern_t)xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t))->index_comm = 0;
467 /* Traverse the stack from the state at position start and re-execute the transitions */
468 for (item = start_item;
469 item != xbt_fifo_get_first_item(stack);
470 item = xbt_fifo_get_prev_item(item)) {
472 state = (mc_state_t) xbt_fifo_get_item_content(item);
473 saved_req = MC_state_get_executed_request(state, &value);
476 /* because we got a copy of the executed request, we have to fetch the
477 real one, pointed by the request field of the issuer process */
479 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
480 req = &issuer->simcall;
482 /* Debug information */
483 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
484 req_str = MC_request_to_string(req, value);
485 XBT_DEBUG("Replay: %s (%p)", req_str, state);
489 /* TODO : handle test and testany simcalls */
490 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
491 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
492 call = mc_get_call_type(req);
494 MC_simcall_handle(req, value);
497 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
498 handle_comm_pattern(call, req, value, NULL, 1);
501 MC_wait_for_requests();
506 /* Update statistics */
507 mc_stats->visited_states++;
508 mc_stats->executed_transitions++;
512 XBT_DEBUG("**** End Replay ****");
513 mmalloc_set_current_heap(heap);
516 void MC_replay_liveness(xbt_fifo_t stack)
519 initial_global_state->raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
521 xbt_fifo_item_t item;
522 mc_pair_t pair = NULL;
523 mc_state_t state = NULL;
524 smx_simcall_t req = NULL, saved_req = NULL;
525 int value, depth = 1;
528 XBT_DEBUG("**** Begin Replay ****");
530 /* Intermediate backtracking */
531 if(_sg_mc_checkpoint > 0) {
532 item = xbt_fifo_get_first_item(stack);
533 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
534 if(pair->graph_state->system_state){
535 MC_restore_snapshot(pair->graph_state->system_state);
541 /* Restore the initial state */
542 MC_restore_snapshot(initial_global_state->snapshot);
544 /* At the moment of taking the snapshot the raw heap was set, so restoring
545 * it will set it back again, we have to unset it to continue */
546 if (!initial_global_state->raw_mem_set)
549 /* Traverse the stack from the initial state and re-execute the transitions */
550 for (item = xbt_fifo_get_last_item(stack);
551 item != xbt_fifo_get_first_item(stack);
552 item = xbt_fifo_get_prev_item(item)) {
554 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
556 state = (mc_state_t) pair->graph_state;
558 if (pair->exploration_started) {
560 saved_req = MC_state_get_executed_request(state, &value);
562 if (saved_req != NULL) {
563 /* because we got a copy of the executed request, we have to fetch the
564 real one, pointed by the request field of the issuer process */
565 const smx_process_t issuer = MC_smx_simcall_get_issuer(saved_req);
566 req = &issuer->simcall;
568 /* Debug information */
569 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
570 req_str = MC_request_to_string(req, value);
571 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
577 MC_simcall_handle(req, value);
578 MC_wait_for_requests();
581 /* Update statistics */
582 mc_stats->visited_pairs++;
583 mc_stats->executed_transitions++;
589 XBT_DEBUG("**** End Replay ****");
591 if (initial_global_state->raw_mem_set)
599 * \brief Dumps the contents of a model-checker's stack and shows the actual
601 * \param stack The stack to dump
603 void MC_dump_stack_safety(xbt_fifo_t stack)
605 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
607 MC_show_stack_safety(stack);
612 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
613 MC_state_delete(state, !state->in_visited_states ? 1 : 0);
614 mmalloc_set_current_heap(heap);
618 void MC_show_stack_safety(xbt_fifo_t stack)
620 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
624 xbt_fifo_item_t item;
626 char *req_str = NULL;
628 for (item = xbt_fifo_get_last_item(stack);
629 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
630 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
631 req = MC_state_get_executed_request(state, &value);
633 req_str = MC_request_to_string(req, value);
634 XBT_INFO("%s", req_str);
639 mmalloc_set_current_heap(heap);
642 void MC_show_deadlock(smx_simcall_t req)
644 /*char *req_str = NULL; */
645 XBT_INFO("**************************");
646 XBT_INFO("*** DEAD-LOCK DETECTED ***");
647 XBT_INFO("**************************");
648 XBT_INFO("Locked request:");
649 /*req_str = MC_request_to_string(req);
650 XBT_INFO("%s", req_str);
651 xbt_free(req_str); */
652 XBT_INFO("Counter-example execution trace:");
653 MC_dump_stack_safety(mc_stack);
654 MC_print_statistics(mc_stats);
658 void MC_show_stack_liveness(xbt_fifo_t stack)
662 xbt_fifo_item_t item;
664 char *req_str = NULL;
666 for (item = xbt_fifo_get_last_item(stack);
667 (item ? (pair = (mc_pair_t) (xbt_fifo_get_item_content(item))) : (NULL));
668 item = xbt_fifo_get_prev_item(item)) {
669 req = MC_state_get_executed_request(pair->graph_state, &value);
670 if (req && req->call != SIMCALL_NONE) {
671 req_str = MC_request_to_string(req, value);
672 XBT_INFO("%s", req_str);
679 void MC_dump_stack_liveness(xbt_fifo_t stack)
681 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
683 while ((pair = (mc_pair_t) xbt_fifo_pop(stack)) != NULL)
684 MC_pair_delete(pair);
685 mmalloc_set_current_heap(heap);
689 void MC_print_statistics(mc_stats_t stats)
691 if (stats->expanded_pairs == 0) {
692 XBT_INFO("Expanded states = %lu", stats->expanded_states);
693 XBT_INFO("Visited states = %lu", stats->visited_states);
695 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
696 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
698 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
699 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
700 if ((_sg_mc_dot_output_file != NULL) && (_sg_mc_dot_output_file[0] != '\0')) {
701 fprintf(dot_output, "}\n");
704 if (initial_global_state != NULL) {
705 if (_sg_mc_comms_determinism)
706 XBT_INFO("Communication-deterministic : %s", !initial_global_state->comm_deterministic ? "No" : "Yes");
707 if (_sg_mc_send_determinism)
708 XBT_INFO("Send-deterministic : %s", !initial_global_state->send_deterministic ? "No" : "Yes");
710 mmalloc_set_current_heap(heap);
713 void MC_automaton_load(const char *file)
715 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
717 if (_mc_property_automaton == NULL)
718 _mc_property_automaton = xbt_automaton_new();
720 xbt_automaton_load(_mc_property_automaton, file);
721 mmalloc_set_current_heap(heap);
724 static void register_symbol(xbt_automaton_propositional_symbol_t symbol)
726 if (mc_mode != MC_MODE_CLIENT)
728 s_mc_register_symbol_message_t message;
729 message.type = MC_MESSAGE_REGISTER_SYMBOL;
730 const char* name = xbt_automaton_propositional_symbol_get_name(symbol);
731 if (strlen(name) + 1 > sizeof(message.name))
732 xbt_die("Symbol is too long");
733 strncpy(message.name, name, sizeof(message.name));
734 message.callback = xbt_automaton_propositional_symbol_get_callback(symbol);
735 message.data = xbt_automaton_propositional_symbol_get_data(symbol);
736 MC_client_send_message(&message, sizeof(message));
739 void MC_automaton_new_propositional_symbol(const char *id, int(*fct)(void))
741 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
743 if (_mc_property_automaton == NULL)
744 _mc_property_automaton = xbt_automaton_new();
746 xbt_automaton_propositional_symbol_t symbol = xbt_automaton_propositional_symbol_new(_mc_property_automaton, id, fct);
747 register_symbol(symbol);
748 mmalloc_set_current_heap(heap);
751 void MC_automaton_new_propositional_symbol_pointer(const char *id, int* value)
753 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
754 if (_mc_property_automaton == NULL)
755 _mc_property_automaton = xbt_automaton_new();
756 xbt_automaton_propositional_symbol_t symbol = xbt_automaton_propositional_symbol_new_pointer(_mc_property_automaton, id, value);
757 register_symbol(symbol);
758 mmalloc_set_current_heap(heap);
761 void MC_automaton_new_propositional_symbol_callback(const char* id,
762 xbt_automaton_propositional_symbol_callback_type callback,
763 void* data, xbt_automaton_propositional_symbol_free_function_type free_function)
765 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
766 if (_mc_property_automaton == NULL)
767 _mc_property_automaton = xbt_automaton_new();
768 xbt_automaton_propositional_symbol_t symbol = xbt_automaton_propositional_symbol_new_callback(
769 _mc_property_automaton, id, callback, data, free_function);
770 register_symbol(symbol);
771 mmalloc_set_current_heap(heap);
774 void MC_dump_stacks(FILE* file)
776 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
779 stack_region_t current_stack;
781 xbt_dynar_foreach(stacks_areas, cursor, current_stack) {
782 unw_context_t * context = (unw_context_t *)current_stack->context;
783 fprintf(file, "Stack %i:\n", nstack);
788 unw_init_local (&c, context);
791 const char * name = !unw_get_proc_name(&c, buffer, 100, &off) ? buffer : "?";
792 fprintf(file, " %i: %s\n", nframe, name);
794 } while(unw_step(&c));
798 mmalloc_set_current_heap(heap);
802 double MC_process_clock_get(smx_process_t process)
806 return mc_time[process->pid];
814 void MC_process_clock_add(smx_process_t process, double amount)
816 mc_time[process->pid] += amount;