1 /* Copyright (c) 2012-2013. 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. */
7 #include "mc_private.h"
9 #include "xbt/mmalloc.h"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, mc,
12 "Logging specific to mc_compare");
14 typedef struct s_pointers_pair{
17 }s_pointers_pair_t, *pointers_pair_t;
19 __thread xbt_dynar_t compared_pointers;
21 /************************** Free functions ****************************/
22 /********************************************************************/
24 static void stack_region_free(stack_region_t s){
26 xbt_free(s->process_name);
31 static void stack_region_free_voidp(void *s){
32 stack_region_free((stack_region_t) * (void **) s);
35 static void pointers_pair_free(pointers_pair_t p){
39 static void pointers_pair_free_voidp(void *p){
40 pointers_pair_free((pointers_pair_t) * (void **)p);
43 /************************** Snapshot comparison *******************************/
44 /******************************************************************************/
46 static int already_compared_pointers(void *p1, void *p2){
48 if(xbt_dynar_is_empty(compared_pointers))
51 unsigned int cursor = 0;
53 int end = xbt_dynar_length(compared_pointers) - 1;
57 cursor = (start + end) / 2;
58 pair = (pointers_pair_t)xbt_dynar_get_as(compared_pointers, cursor, pointers_pair_t);
62 else if(pair->p2 < p2)
66 }else if(pair->p1 < p1){
77 static void add_compared_pointers(void *p1, void *p2){
79 pointers_pair_t new_pair = xbt_new0(s_pointers_pair_t, 1);
83 if(xbt_dynar_is_empty(compared_pointers)){
84 xbt_dynar_push(compared_pointers, &new_pair);
88 unsigned int cursor = 0;
90 int end = xbt_dynar_length(compared_pointers) - 1;
91 pointers_pair_t pair = NULL;
94 cursor = (start + end) / 2;
95 pair = (pointers_pair_t)xbt_dynar_get_as(compared_pointers, cursor, pointers_pair_t);
98 pointers_pair_free(new_pair);
100 }else if(pair->p2 < p2)
104 }else if(pair->p1 < p1){
113 xbt_dynar_insert_at(compared_pointers, cursor + 1, &new_pair);
115 xbt_dynar_insert_at(compared_pointers, cursor, &new_pair);
118 xbt_dynar_insert_at(compared_pointers, cursor + 1, &new_pair);
120 xbt_dynar_insert_at(compared_pointers, cursor, &new_pair);
125 static int compare_areas_with_type(void *area1, void *area2, xbt_dict_t types, xbt_dict_t other_types, char *type_id, int region_size, int region_type, void *start_data, int pointer_level){
127 dw_type_t type = xbt_dict_get_or_null(types, type_id);;
128 unsigned int cursor = 0;
129 dw_type_t member, subtype, subsubtype;
130 int elm_size, i, res, switch_types = 0;
131 void *addr_pointed1, *addr_pointed2;
135 case e_dw_enumeration_type:
136 case e_dw_union_type:
137 return (memcmp(area1, area2, type->size) != 0);
140 case e_dw_volatile_type:
141 return compare_areas_with_type(area1, area2, types, other_types, type->dw_type_id, region_size, region_type, start_data, pointer_level);
143 case e_dw_const_type: /* Const variable cannot be modified */
146 case e_dw_array_type:
147 subtype = xbt_dict_get_or_null(types, type->dw_type_id);
148 switch(subtype->type){
150 case e_dw_enumeration_type:
151 case e_dw_pointer_type:
152 case e_dw_structure_type:
153 case e_dw_union_type:
154 if(subtype->size == 0){ /*declaration of the type, need the complete description */
155 subtype = xbt_dict_get_or_null(types, get_type_description(types, subtype->name));
157 subtype = xbt_dict_get_or_null(other_types, get_type_description(other_types, subtype->name));
161 elm_size = subtype->size;
164 case e_dw_volatile_type:
165 subsubtype = xbt_dict_get_or_null(types, subtype->dw_type_id);
166 if(subsubtype->size == 0){ /*declaration of the type, need the complete description */
167 subsubtype = xbt_dict_get_or_null(types, get_type_description(types, subsubtype->name));
168 if(subsubtype == NULL){
169 subsubtype = xbt_dict_get_or_null(other_types, get_type_description(other_types, subsubtype->name));
173 elm_size = subsubtype->size;
179 for(i=0; i<type->size; i++){
181 res = compare_areas_with_type((char *)area1 + (i*elm_size), (char *)area2 + (i*elm_size), other_types, types, type->dw_type_id, region_size, region_type, start_data, pointer_level);
183 res = compare_areas_with_type((char *)area1 + (i*elm_size), (char *)area2 + (i*elm_size), types, other_types, type->dw_type_id, region_size, region_type, start_data, pointer_level);
188 case e_dw_pointer_type:
189 if(type->dw_type_id && ((dw_type_t)xbt_dict_get_or_null(types, type->dw_type_id))->type == e_dw_subroutine_type){
190 addr_pointed1 = *((void **)(area1));
191 addr_pointed2 = *((void **)(area2));
192 return (addr_pointed1 != addr_pointed2);
194 addr_pointed1 = *((void **)(area1));
195 addr_pointed2 = *((void **)(area2));
197 if(addr_pointed1 == NULL && addr_pointed2 == NULL)
199 if(already_compared_pointers(addr_pointed1, addr_pointed2) != -1)
201 add_compared_pointers(addr_pointed1, addr_pointed2);
205 if(addr_pointed1 > std_heap && (char *)addr_pointed1 < (char*) std_heap + STD_HEAP_SIZE && addr_pointed2 > std_heap && (char *)addr_pointed2 < (char*) std_heap + STD_HEAP_SIZE){
206 return compare_heap_area(addr_pointed1, addr_pointed2, NULL, types, other_types, type->dw_type_id, pointer_level);
207 }else if(addr_pointed1 > start_data && (char*)addr_pointed1 <= (char *)start_data + region_size && addr_pointed2 > start_data && (char*)addr_pointed2 <= (char *)start_data + region_size){
208 if(type->dw_type_id == NULL)
209 return (addr_pointed1 != addr_pointed2);
211 return compare_areas_with_type(addr_pointed1, addr_pointed2, types, other_types, type->dw_type_id, region_size, region_type, start_data, pointer_level);
213 return (addr_pointed1 != addr_pointed2);
217 case e_dw_structure_type:
218 xbt_dynar_foreach(type->members, cursor, member){
219 res = compare_areas_with_type((char *)area1 + member->offset, (char *)area2 + member->offset, types, other_types, member->dw_type_id, region_size, region_type, start_data, pointer_level);
224 case e_dw_subroutine_type:
228 XBT_VERB("Unknown case : %d", type->type);
235 static int compare_global_variables(int region_type, mc_mem_region_t r1, mc_mem_region_t r2){
237 if(!compared_pointers){
238 compared_pointers = xbt_dynar_new(sizeof(pointers_pair_t), pointers_pair_free_voidp);
239 MC_ignore_global_variable("compared_pointers");
241 xbt_dynar_reset(compared_pointers);
244 xbt_dynar_t variables;
245 xbt_dict_t types, other_types;
247 unsigned int cursor = 0;
248 dw_variable_t current_var;
252 if(region_type == 2){
253 variables = mc_global_variables_binary;
254 types = mc_variables_type_binary;
255 other_types = mc_variables_type_libsimgrid;
256 start_data = start_data_binary;
258 variables = mc_global_variables_libsimgrid;
259 types = mc_variables_type_libsimgrid;
260 other_types = mc_variables_type_binary;
261 start_data = start_data_libsimgrid;
264 xbt_dynar_foreach(variables, cursor, current_var){
267 offset = (char *)current_var->address.address - (char *)start_data_binary;
269 offset = (char *)current_var->address.address - (char *)start_data_libsimgrid;
271 res = compare_areas_with_type((char *)r1->data + offset, (char *)r2->data + offset, types, other_types, current_var->type_origin, r1->size, region_type, start_data, 0);
273 XBT_VERB("Global variable %s (%p - %p) is different between snapshots", current_var->name, (char *)r1->data + offset, (char *)r2->data + offset);
274 xbt_dynar_free(&compared_pointers);
275 compared_pointers = NULL;
281 xbt_dynar_free(&compared_pointers);
282 compared_pointers = NULL;
288 static int compare_local_variables(mc_snapshot_stack_t stack1, mc_snapshot_stack_t stack2, void *heap1, void *heap2){
290 if(!compared_pointers){
291 compared_pointers = xbt_dynar_new(sizeof(pointers_pair_t), pointers_pair_free_voidp);
292 MC_ignore_global_variable("compared_pointers");
294 xbt_dynar_reset(compared_pointers);
297 if(xbt_dynar_length(stack1->local_variables) != xbt_dynar_length(stack2->local_variables)){
298 XBT_VERB("Different number of local variables");
299 xbt_dynar_free(&compared_pointers);
300 compared_pointers = NULL;
303 unsigned int cursor = 0;
304 local_variable_t current_var1, current_var2;
305 int offset1, offset2, res;
306 while(cursor < xbt_dynar_length(stack1->local_variables)){
307 current_var1 = (local_variable_t)xbt_dynar_get_as(stack1->local_variables, cursor, local_variable_t);
308 current_var2 = (local_variable_t)xbt_dynar_get_as(stack2->local_variables, cursor, local_variable_t);
309 if(strcmp(current_var1->name, current_var2->name) != 0 || strcmp(current_var1->frame, current_var2->frame) != 0 || current_var1->ip != current_var2->ip){
310 xbt_dynar_free(&compared_pointers);
313 offset1 = (char *)current_var1->address - (char *)std_heap;
314 offset2 = (char *)current_var2->address - (char *)std_heap;
315 if(current_var1->region == 1)
316 res = compare_areas_with_type( (char *)heap1 + offset1, (char *)heap2 + offset2, mc_variables_type_libsimgrid, mc_variables_type_binary, current_var1->type, 0, 1, start_data_libsimgrid, 0);
318 res = compare_areas_with_type( (char *)heap1 + offset1, (char *)heap2 + offset2, mc_variables_type_binary, mc_variables_type_libsimgrid, current_var1->type, 0, 2, start_data_binary, 0);
320 XBT_VERB("Local variable %s (%p - %p) in frame %s is different between snapshots", current_var1->name,(char *)heap1 + offset1, (char *)heap2 + offset2, current_var1->frame);
321 xbt_dynar_free(&compared_pointers);
322 compared_pointers = NULL;
327 xbt_dynar_free(&compared_pointers);
328 compared_pointers = NULL;
333 int snapshot_compare(void *p1, void *p2){
335 mc_snapshot_t s1 = ((mc_pair_t)p1)->graph_state->system_state;
336 mc_snapshot_t s2 = ((mc_pair_t)p2)->graph_state->system_state;
341 xbt_os_timer_t global_timer = xbt_os_timer_new();
342 xbt_os_timer_t timer = xbt_os_timer_new();
344 xbt_os_walltimer_start(global_timer);
347 xbt_os_walltimer_start(timer);
350 /* Compare size of stacks */
352 size_t size_used1, size_used2;
354 while(i < xbt_dynar_length(s1->stacks)){
355 size_used1 = s1->stack_sizes[i];
356 size_used2 = s2->stack_sizes[i];
357 if(size_used1 != size_used2){
360 xbt_os_walltimer_stop(timer);
361 mc_comp_times->stacks_sizes_comparison_time = xbt_os_timer_elapsed(timer);
363 XBT_DEBUG("(%d - %d) Different size used in stacks : %zu - %zu", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num, size_used1, size_used2);
368 XBT_VERB("(%d - %d) Different size used in stacks : %zu - %zu", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num, size_used1, size_used2);
371 xbt_os_walltimer_stop(timer);
372 xbt_os_timer_free(timer);
373 xbt_os_walltimer_stop(global_timer);
374 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
375 xbt_os_timer_free(global_timer);
385 xbt_os_walltimer_stop(timer);
386 xbt_os_walltimer_start(timer);
389 /* Compare hash of global variables */
390 if(s1->hash_global != NULL && s2->hash_global != NULL){
391 if(strcmp(s1->hash_global, s2->hash_global) != 0){
393 xbt_os_walltimer_stop(timer);
394 mc_comp_times->hash_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
395 XBT_DEBUG("Different hash of global variables : %s - %s", s1->hash_global, s2->hash_global);
399 XBT_VERB("Different hash of global variables : %s - %s", s1->hash_global, s2->hash_global);
402 xbt_os_walltimer_stop(timer);
403 xbt_os_timer_free(timer);
404 xbt_os_walltimer_stop(global_timer);
405 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
406 xbt_os_timer_free(global_timer);
414 xbt_os_walltimer_start(timer);
417 /* Compare hash of local variables */
418 if(s1->hash_local != NULL && s2->hash_local != NULL){
419 if(strcmp(s1->hash_local, s2->hash_local) != 0){
421 xbt_os_walltimer_stop(timer);
422 mc_comp_times->hash_local_variables_comparison_time = xbt_os_timer_elapsed(timer);
423 XBT_DEBUG("Different hash of local variables : %s - %s", s1->hash_local, s2->hash_local);
427 XBT_VERB("Different hash of local variables : %s - %s", s1->hash_local, s2->hash_local);
430 xbt_os_walltimer_stop(timer);
431 xbt_os_timer_free(timer);
432 xbt_os_walltimer_stop(global_timer);
433 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
434 xbt_os_timer_free(global_timer);
442 xbt_os_walltimer_start(timer);
445 /* Init heap information used in heap comparison algorithm */
446 res_init = init_heap_information((xbt_mheap_t)s1->regions[0]->data, (xbt_mheap_t)s2->regions[0]->data, s1->to_ignore, s2->to_ignore);
449 XBT_DEBUG("(%d - %d) Different heap information", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
453 XBT_VERB("(%d - %d) Different heap information", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
456 xbt_os_walltimer_stop(global_timer);
457 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
458 xbt_os_timer_free(global_timer);
465 xbt_os_walltimer_start(timer);
468 /* Stacks comparison */
469 unsigned int cursor = 0;
472 mc_snapshot_stack_t stack1, stack2;
474 while(cursor < xbt_dynar_length(s1->stacks)){
475 stack1 = (mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t);
476 stack2 = (mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t);
477 diff_local = compare_local_variables(stack1, stack2, s1->regions[0]->data, s2->regions[0]->data);
481 xbt_os_walltimer_stop(timer);
482 mc_comp_times->stacks_comparison_time = xbt_os_timer_elapsed(timer);
484 XBT_DEBUG("(%d - %d) Different local variables between stacks %d", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num, cursor + 1);
490 XBT_VERB("(%d - %d) Different local variables between stacks %d", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num, cursor + 1);
493 reset_heap_information();
494 xbt_os_walltimer_stop(timer);
495 xbt_os_timer_free(timer);
496 xbt_os_walltimer_stop(global_timer);
497 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
498 xbt_os_timer_free(global_timer);
508 xbt_os_walltimer_stop(timer);
509 xbt_os_walltimer_start(timer);
512 /* Compare binary global variables */
513 is_diff = compare_global_variables(2, s1->regions[2], s2->regions[2]);
516 xbt_os_walltimer_stop(timer);
517 mc_comp_times->binary_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
518 XBT_DEBUG("(%d - %d) Different global variables in binary", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
522 XBT_VERB("(%d - %d) Different global variables in binary", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
525 reset_heap_information();
526 xbt_os_walltimer_stop(timer);
527 xbt_os_timer_free(timer);
528 xbt_os_walltimer_stop(global_timer);
529 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
530 xbt_os_timer_free(global_timer);
538 xbt_os_walltimer_stop(timer);
539 xbt_os_walltimer_start(timer);
542 /* Compare libsimgrid global variables */
543 is_diff = compare_global_variables(1, s1->regions[1], s2->regions[1]);
546 xbt_os_walltimer_stop(timer);
547 mc_comp_times->libsimgrid_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
548 XBT_DEBUG("(%d - %d) Different global variables in libsimgrid", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
552 XBT_VERB("(%d - %d) Different global variables in libsimgrid", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
555 reset_heap_information();
556 xbt_os_walltimer_stop(timer);
557 xbt_os_timer_free(timer);
558 xbt_os_walltimer_stop(global_timer);
559 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
560 xbt_os_timer_free(global_timer);
567 xbt_os_walltimer_start(timer);
571 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[0]->data, (xbt_mheap_t)s2->regions[0]->data) > 0){
574 xbt_os_walltimer_stop(timer);
575 mc_comp_times->heap_comparison_time = xbt_os_timer_elapsed(timer);
576 XBT_DEBUG("(%d - %d) Different heap (mmalloc_compare)", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
581 XBT_VERB("(%d - %d) Different heap (mmalloc_compare)", ((mc_pair_t)p1)->num, ((mc_pair_t)p2)->num);
584 reset_heap_information();
585 xbt_os_walltimer_stop(timer);
586 xbt_os_timer_free(timer);
587 xbt_os_walltimer_stop(global_timer);
588 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
589 xbt_os_timer_free(global_timer);
595 xbt_os_walltimer_stop(timer);
599 reset_heap_information();
601 xbt_os_walltimer_stop(timer);
602 xbt_os_timer_free(timer);
605 xbt_os_walltimer_stop(global_timer);
606 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
609 xbt_os_timer_free(global_timer);
612 print_comparison_times();
619 /***************************** Statistics *****************************/
620 /*******************************************************************/
622 void print_comparison_times(){
623 XBT_DEBUG("*** Comparison times ***");
624 XBT_DEBUG("- Nb processes : %f", mc_comp_times->nb_processes_comparison_time);
625 XBT_DEBUG("- Nb bytes used : %f", mc_comp_times->bytes_used_comparison_time);
626 XBT_DEBUG("- Stacks sizes : %f", mc_comp_times->stacks_sizes_comparison_time);
627 XBT_DEBUG("- Binary global variables : %f", mc_comp_times->binary_global_variables_comparison_time);
628 XBT_DEBUG("- Libsimgrid global variables : %f", mc_comp_times->libsimgrid_global_variables_comparison_time);
629 XBT_DEBUG("- Heap : %f", mc_comp_times->heap_comparison_time);
630 XBT_DEBUG("- Stacks : %f", mc_comp_times->stacks_comparison_time);
633 /**************************** MC snapshot compare simcall **************************/
634 /***********************************************************************************/
636 int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall,
637 mc_snapshot_t s1, mc_snapshot_t s2){
638 return snapshot_compare(s1, s2);
641 int MC_compare_snapshots(void *s1, void *s2){
643 MC_ignore_local_variable("self", "simcall_BODY_mc_snapshot");
644 return simcall_mc_compare_snapshots(s1, s2);