1 /* Copyright (c) 2012-2013 Da SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "mc_private.h"
8 #include "xbt/mmalloc.h"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_compare, mc,
11 "Logging specific to mc_compare");
13 typedef struct s_pointers_pair{
16 }s_pointers_pair_t, *pointers_pair_t;
18 xbt_dynar_t compared_pointers;
20 static int heap_region_compare(void *d1, void *d2, size_t size);
22 static void stack_region_free(stack_region_t s);
24 static int compare_local_variables(mc_snapshot_stack_t stack1, mc_snapshot_stack_t stack2, void *heap1, void *heap2);
25 static int compare_global_variables(int region_type, mc_mem_region_t r1, mc_mem_region_t r2);
26 static int compare_pointer(char *pointer_type, void *addr_pointed1, void *addr_pointed2, int region_size, int region_type);
27 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);
29 static int already_compared_pointers(void *p1, void *p2){
31 if(xbt_dynar_is_empty(compared_pointers))
34 unsigned int cursor = 0;
36 int end = xbt_dynar_length(compared_pointers) - 1;
40 cursor = (start + end) / 2;
41 pair = (pointers_pair_t)xbt_dynar_get_as(compared_pointers, cursor, pointers_pair_t);
45 else if(pair->p2 < p2)
49 }else if(pair->p1 < p1){
60 static void add_compared_pointers(void *p1, void *p2){
62 pointers_pair_t new_pair = xbt_new0(s_pointers_pair_t, 1);
66 if(xbt_dynar_is_empty(compared_pointers)){
67 xbt_dynar_push(compared_pointers, &new_pair);
71 unsigned int cursor = 0;
73 int end = xbt_dynar_length(compared_pointers) - 1;
74 pointers_pair_t pair = NULL;
77 cursor = (start + end) / 2;
78 pair = (pointers_pair_t)xbt_dynar_get_as(compared_pointers, cursor, pointers_pair_t);
82 else if(pair->p2 < p2)
86 }else if(pair->p1 < p1){
95 xbt_dynar_insert_at(compared_pointers, cursor + 1, &new_pair);
97 xbt_dynar_insert_at(compared_pointers, cursor, &new_pair);
100 xbt_dynar_insert_at(compared_pointers, cursor + 1, &new_pair);
102 xbt_dynar_insert_at(compared_pointers, cursor, &new_pair);
107 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){
109 dw_type_t type = xbt_dict_get_or_null(types, type_id);;
110 unsigned int cursor = 0;
111 dw_type_t member, subtype, subsubtype;
112 int elm_size, i, res, switch_types = 0;
113 void *addr_pointed1, *addr_pointed2;
114 int pointed_area_size1, pointed_area_size2;
118 case e_dw_enumeration_type:
119 case e_dw_union_type:
120 return (memcmp(area1, area2, type->size) != 0);
123 case e_dw_volatile_type:
124 return compare_areas_with_type(area1, area2, types, other_types, type->dw_type_id, region_size, region_type, start_data, pointer_level);
126 case e_dw_const_type: /* Const variable cannot be modified */
129 case e_dw_array_type:
130 subtype = xbt_dict_get_or_null(types, type->dw_type_id);
131 switch(subtype->type){
133 case e_dw_enumeration_type:
134 case e_dw_pointer_type:
135 case e_dw_structure_type:
136 case e_dw_union_type:
137 if(subtype->size == 0){ /*declaration of the type, need the complete description */
138 subtype = xbt_dict_get_or_null(types, get_type_description(types, subtype->name));
140 subtype = xbt_dict_get_or_null(other_types, get_type_description(other_types, subtype->name));
144 elm_size = subtype->size;
147 case e_dw_volatile_type:
148 subsubtype = xbt_dict_get_or_null(types, subtype->dw_type_id);
149 if(subsubtype->size == 0){ /*declaration of the type, need the complete description */
150 subsubtype = xbt_dict_get_or_null(types, get_type_description(types, subsubtype->name));
151 if(subsubtype == NULL){
152 subsubtype = xbt_dict_get_or_null(other_types, get_type_description(other_types, subsubtype->name));
156 elm_size = subsubtype->size;
162 for(i=0; i<type->size; i++){
164 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);
166 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);
171 case e_dw_pointer_type:
172 if(type->dw_type_id && ((dw_type_t)xbt_dict_get_or_null(types, type->dw_type_id))->type == e_dw_subroutine_type){
173 addr_pointed1 = *((void **)(area1));
174 addr_pointed2 = *((void **)(area2));
175 return (addr_pointed1 != addr_pointed2);
177 addr_pointed1 = *((void **)(area1));
178 addr_pointed2 = *((void **)(area2));
180 if((addr_pointed1 == addr_pointed2) && ((pointed_area_size1 = get_pointed_area_size(addr_pointed1, 1)) != (pointed_area_size2 = get_pointed_area_size(addr_pointed2, 2))))
182 if(addr_pointed1 == NULL && addr_pointed2 == NULL)
184 if(already_compared_pointers(addr_pointed1, addr_pointed2) != -1)
186 add_compared_pointers(addr_pointed1, addr_pointed2);
190 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){
191 return compare_heap_area(addr_pointed1, addr_pointed2, NULL, types, other_types, type->dw_type_id, pointer_level);
192 }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){
193 if(type->dw_type_id == NULL)
194 return (addr_pointed1 != addr_pointed2);
196 return compare_areas_with_type(addr_pointed1, addr_pointed2, types, other_types, type->dw_type_id, region_size, region_type, start_data, pointer_level);
198 return (addr_pointed1 != addr_pointed2);
202 case e_dw_structure_type:
203 xbt_dynar_foreach(type->members, cursor, member){
204 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);
209 case e_dw_subroutine_type:
213 XBT_VERB("Unknown case : %d", type->type);
220 static int compare_global_variables(int region_type, mc_mem_region_t r1, mc_mem_region_t r2){
222 if(!compared_pointers){
223 compared_pointers = xbt_dynar_new(sizeof(pointers_pair_t), NULL);
224 MC_ignore_global_variable("compared_pointers");
226 xbt_dynar_reset(compared_pointers);
229 xbt_dynar_t variables;
230 xbt_dict_t types, other_types;
232 unsigned int cursor = 0;
233 dw_variable_t current_var;
237 if(region_type == 2){
238 variables = mc_global_variables_binary;
239 types = mc_variables_type_binary;
240 other_types = mc_variables_type_libsimgrid;
241 start_data = start_data_binary;
243 variables = mc_global_variables_libsimgrid;
244 types = mc_variables_type_libsimgrid;
245 other_types = mc_variables_type_binary;
246 start_data = start_data_libsimgrid;
249 xbt_dynar_foreach(variables, cursor, current_var){
252 offset = (char *)current_var->address.address - (char *)start_data_binary;
254 offset = (char *)current_var->address.address - (char *)start_data_libsimgrid;
256 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);
258 xbt_dynar_cursor_rm(variables, &cursor);
260 XBT_VERB("Global variable %s is different between snapshots", current_var->name);
269 static int compare_local_variables(mc_snapshot_stack_t stack1, mc_snapshot_stack_t stack2, void *heap1, void *heap2){
271 if(!compared_pointers){
272 compared_pointers = xbt_dynar_new(sizeof(pointers_pair_t), NULL);
273 MC_ignore_global_variable("compared_pointers");
275 xbt_dynar_reset(compared_pointers);
278 if(xbt_dynar_length(stack1->local_variables) != xbt_dynar_length(stack2->local_variables)){
279 XBT_VERB("Different number of local variables");
282 unsigned int cursor = 0;
283 local_variable_t current_var1, current_var2;
284 int offset1, offset2, res;
285 while(cursor < xbt_dynar_length(stack1->local_variables)){
286 current_var1 = (local_variable_t)xbt_dynar_get_as(stack1->local_variables, cursor, local_variable_t);
287 current_var2 = (local_variable_t)xbt_dynar_get_as(stack2->local_variables, cursor, local_variable_t);
288 if(strcmp(current_var1->name, current_var2->name) != 0 || strcmp(current_var1->frame, current_var2->frame) != 0 || current_var1->ip != current_var2->ip)
290 offset1 = (char *)current_var1->address - (char *)std_heap;
291 offset2 = (char *)current_var2->address - (char *)std_heap;
292 if(current_var1->region == 1)
293 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, 0l);
295 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, 0l);
297 XBT_VERB("Local variable %s in frame %s is different between snapshots", current_var1->name, current_var1->frame);
307 static int heap_region_compare(void *d1, void *d2, size_t size){
311 for(i=0; i<size; i++){
312 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
313 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
314 XBT_VERB("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
323 static void stack_region_free(stack_region_t s){
325 xbt_free(s->process_name);
330 void stack_region_free_voidp(void *s){
331 stack_region_free((stack_region_t) * (void **) s);
334 int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall,
335 mc_snapshot_t s1, mc_snapshot_t s2){
336 return snapshot_compare(s1, s2);
339 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
341 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
347 xbt_os_timer_t global_timer = xbt_os_timer_new();
348 xbt_os_timer_t timer = xbt_os_timer_new();
350 xbt_os_walltimer_start(global_timer);
353 xbt_os_walltimer_start(timer);
356 /* Compare size of stacks */
358 size_t size_used1, size_used2;
360 while(i < xbt_dynar_length(s1->stacks)){
361 size_used1 = s1->stack_sizes[i];
362 size_used2 = s2->stack_sizes[i];
363 if(size_used1 != size_used2){
366 xbt_os_walltimer_stop(timer);
367 mc_comp_times->stacks_sizes_comparison_time = xbt_os_timer_elapsed(timer);
369 XBT_DEBUG("Different size used in stacks : %zu - %zu", size_used1, size_used2);
374 XBT_VERB("Different size used in stacks : %zu - %zu", size_used1, size_used2);
377 xbt_os_timer_free(timer);
378 xbt_os_walltimer_stop(global_timer);
379 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
380 xbt_os_timer_free(global_timer);
393 xbt_os_walltimer_stop(timer);
394 xbt_os_walltimer_start(timer);
397 /* Compare hash of global variables */
398 if(s1->hash_global != NULL && s2->hash_global != NULL){
399 if(strcmp(s1->hash_global, s2->hash_global) != 0){
401 xbt_os_walltimer_stop(timer);
402 mc_comp_times->hash_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
403 XBT_DEBUG("Different hash of global variables : %s - %s", s1->hash_global, s2->hash_global);
407 XBT_VERB("Different hash of global variables : %s - %s", s1->hash_global, s2->hash_global);
410 xbt_os_timer_free(timer);
411 xbt_os_walltimer_stop(global_timer);
412 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
413 xbt_os_timer_free(global_timer);
424 xbt_os_walltimer_start(timer);
427 /* Compare hash of local variables */
428 if(s1->hash_local != NULL && s2->hash_local != NULL){
429 if(strcmp(s1->hash_local, s2->hash_local) != 0){
431 xbt_os_walltimer_stop(timer);
432 mc_comp_times->hash_local_variables_comparison_time = xbt_os_timer_elapsed(timer);
433 XBT_DEBUG("Different hash of local variables : %s - %s", s1->hash_local, s2->hash_local);
437 XBT_VERB("Different hash of local variables : %s - %s", s1->hash_local, s2->hash_local);
440 xbt_os_timer_free(timer);
441 xbt_os_walltimer_stop(global_timer);
442 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
443 xbt_os_timer_free(global_timer);
454 xbt_os_walltimer_start(timer);
457 /* Init heap information used in heap comparison algorithm */
458 init_heap_information((xbt_mheap_t)s1->regions[0]->data, (xbt_mheap_t)s2->regions[0]->data, s1->to_ignore, s2->to_ignore);
460 /* Stacks comparison */
461 unsigned int cursor = 0;
464 mc_snapshot_stack_t stack1, stack2;
466 while(cursor < xbt_dynar_length(s1->stacks)){
467 stack1 = (mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t);
468 stack2 = (mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t);
469 diff_local = compare_local_variables(stack1, stack2, s1->regions[0]->data, s2->regions[0]->data);
473 xbt_os_walltimer_stop(timer);
474 mc_comp_times->stacks_comparison_time = xbt_os_timer_elapsed(timer);
476 XBT_DEBUG("Different local variables between stacks %d", cursor + 1);
482 XBT_VERB("Different local variables between stacks %d", cursor + 1);
485 reset_heap_information();
486 xbt_os_timer_free(timer);
487 xbt_os_walltimer_stop(global_timer);
488 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
489 xbt_os_timer_free(global_timer);
502 xbt_os_walltimer_stop(timer);
503 xbt_os_walltimer_start(timer);
506 /* Compare binary global variables */
507 is_diff = compare_global_variables(2, s1->regions[2], s2->regions[2]);
510 xbt_os_walltimer_stop(timer);
511 mc_comp_times->binary_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
512 XBT_DEBUG("Different global variables in binary");
516 XBT_VERB("Different global variables in binary");
519 reset_heap_information();
520 xbt_os_timer_free(timer);
521 xbt_os_walltimer_stop(global_timer);
522 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
523 xbt_os_timer_free(global_timer);
534 xbt_os_walltimer_stop(timer);
535 xbt_os_walltimer_start(timer);
538 /* Compare libsimgrid global variables */
539 is_diff = compare_global_variables(1, s1->regions[1], s2->regions[1]);
542 xbt_os_walltimer_stop(timer);
543 mc_comp_times->libsimgrid_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
544 XBT_DEBUG("Different global variables in libsimgrid");
548 XBT_VERB("Different global variables in libsimgrid");
551 reset_heap_information();
552 xbt_os_timer_free(timer);
553 xbt_os_walltimer_stop(global_timer);
554 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
555 xbt_os_timer_free(global_timer);
565 xbt_os_walltimer_start(timer);
569 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[0]->data, (xbt_mheap_t)s2->regions[0]->data) > 0){
572 xbt_os_walltimer_stop(timer);
573 mc_comp_times->heap_comparison_time = xbt_os_timer_elapsed(timer);
574 XBT_DEBUG("Different heap (mmalloc_compare)");
578 xbt_os_timer_free(timer);
581 XBT_VERB("Different heap (mmalloc_compare)");
584 reset_heap_information();
585 xbt_os_walltimer_stop(global_timer);
586 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
587 xbt_os_timer_free(global_timer);
596 xbt_os_walltimer_stop(timer);
600 reset_heap_information();
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();
622 int MC_compare_snapshots(void *s1, void *s2){
624 MC_ignore_local_variable("self", "simcall_BODY_mc_snapshot");
626 return simcall_mc_compare_snapshots(s1, s2);
630 void print_comparison_times(){
631 XBT_DEBUG("*** Comparison times ***");
632 XBT_DEBUG("- Nb processes : %f", mc_comp_times->nb_processes_comparison_time);
633 XBT_DEBUG("- Nb bytes used : %f", mc_comp_times->bytes_used_comparison_time);
634 XBT_DEBUG("- Stacks sizes : %f", mc_comp_times->stacks_sizes_comparison_time);
635 XBT_DEBUG("- Binary global variables : %f", mc_comp_times->binary_global_variables_comparison_time);
636 XBT_DEBUG("- Libsimgrid global variables : %f", mc_comp_times->libsimgrid_global_variables_comparison_time);
637 XBT_DEBUG("- Heap : %f", mc_comp_times->heap_comparison_time);
638 XBT_DEBUG("- Stacks : %f", mc_comp_times->stacks_comparison_time);