1 /* Copyright (c) 2008-2012 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 static int heap_region_compare(void *d1, void *d2, size_t size);
15 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals);
16 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2);
17 static size_t heap_ignore_size(void *address);
19 static void stack_region_free(stack_region_t s);
20 static void heap_equality_free(heap_equality_t e);
22 static int is_stack_ignore_variable(char *frame, char *var_name);
23 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals);
25 static size_t heap_ignore_size(void *address){
26 unsigned int cursor = 0;
28 int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
29 mc_heap_ignore_region_t region;
32 cursor = (start + end) / 2;
33 region = (mc_heap_ignore_region_t)xbt_dynar_get_as(mc_heap_comparison_ignore, cursor, mc_heap_ignore_region_t);
34 if(region->address == address)
36 if(region->address < address)
38 if(region->address > address)
45 static int compare_global_variables(int region_type, void *d1, void *d2){
47 unsigned int cursor = 0;
50 global_variable_t current_var;
52 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
54 if(region_type == 1){ /* libsimgrid */
55 xbt_dynar_foreach(mc_global_variables, cursor, current_var){
56 if(current_var->address < start_data_libsimgrid)
58 offset = (char *)current_var->address - (char *)start_data_libsimgrid;
60 while(i < current_var->size){
61 if(memcmp((char*)d1 + offset + i, (char*)d2 + offset + i, 1) != 0){
62 pointer_align = (i / sizeof(void*)) * sizeof(void*);
63 addr_pointed1 = *((void **)((char *)d1 + offset + pointer_align));
64 addr_pointed2 = *((void **)((char *)d2 + offset + pointer_align));
65 if((addr_pointed1 > start_plt_libsimgrid && addr_pointed1 < end_plt_libsimgrid) || (addr_pointed2 > start_plt_libsimgrid && addr_pointed2 < end_plt_libsimgrid)){
66 i = current_var->size;
69 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
70 XBT_VERB("Different global variable in libsimgrid : %s at addresses %p - %p (size = %zu)", current_var->name, (char *)d1+offset, (char *)d2+offset, current_var->size);
79 xbt_dynar_foreach(mc_global_variables, cursor, current_var){
80 if(current_var->address > start_data_libsimgrid)
82 offset = (char *)current_var->address - (char *)start_data_binary;
84 while(i < current_var->size){
85 if(memcmp((char*)d1 + offset + i, (char*)d2 + offset + i, 1) != 0){
86 pointer_align = (i / sizeof(void*)) * sizeof(void*);
87 addr_pointed1 = *((void **)((char *)d1 + offset + pointer_align));
88 addr_pointed2 = *((void **)((char *)d2 + offset + pointer_align));
89 if((addr_pointed1 > start_plt_binary && addr_pointed1 < end_plt_binary) || (addr_pointed2 > start_plt_binary && addr_pointed2 < end_plt_binary)){
90 i = current_var->size;
93 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
94 XBT_VERB("Different global variable in binary : %s", current_var->name);
108 static int heap_region_compare(void *d1, void *d2, size_t size){
112 for(i=0; i<size; i++){
113 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
114 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
115 XBT_VERB("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
124 static void stack_region_free(stack_region_t s){
126 xbt_free(s->process_name);
131 void stack_region_free_voidp(void *s){
132 stack_region_free((stack_region_t) * (void **) s);
135 static void heap_equality_free(heap_equality_t e){
141 void heap_equality_free_voidp(void *e){
142 heap_equality_free((heap_equality_t) * (void **) e);
145 int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall,
146 mc_snapshot_t s1, mc_snapshot_t s2){
147 return snapshot_compare(s1, s2);
150 int get_heap_region_index(mc_snapshot_t s){
152 while(i < s->num_reg){
153 switch(s->regions[i]->type){
165 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
167 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
173 xbt_os_timer_t global_timer = xbt_os_timer_new();
174 xbt_os_timer_t timer = xbt_os_timer_new();
176 xbt_os_timer_start(global_timer);
179 xbt_os_timer_start(timer);
182 /* Compare number of processes */
183 if(s1->nb_processes != s2->nb_processes){
185 xbt_os_timer_stop(timer);
186 mc_comp_times->nb_processes_comparison_time = xbt_os_timer_elapsed(timer);
187 XBT_DEBUG("Different number of processes : %d - %d", s1->nb_processes, s2->nb_processes);
191 XBT_VERB("Different number of processes : %d - %d", s1->nb_processes, s2->nb_processes);
194 xbt_os_timer_free(timer);
195 xbt_os_timer_stop(global_timer);
196 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
197 xbt_os_timer_free(global_timer);
206 /* Compare number of blocks/fragments used in each heap */
207 if(s1->heap_chunks_used != s2->heap_chunks_used){
209 xbt_os_timer_stop(timer);
210 mc_comp_times->chunks_used_comparison_time = xbt_os_timer_elapsed(timer);
211 XBT_DEBUG("Different number of chunks used in each heap : %zu - %zu", s1->heap_chunks_used, s2->heap_chunks_used);
215 XBT_VERB("Different number of chunks used in each heap : %zu - %zu", s1->heap_chunks_used, s2->heap_chunks_used);
218 xbt_os_timer_free(timer);
219 xbt_os_timer_stop(global_timer);
220 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
221 xbt_os_timer_free(global_timer);
230 xbt_os_timer_stop(timer);
235 xbt_os_timer_start(timer);
238 /* Compare size of stacks */
240 size_t size_used1, size_used2;
242 while(i < xbt_dynar_length(s1->stacks)){
243 size_used1 = s1->stack_sizes[i];
244 size_used2 = s2->stack_sizes[i];
245 if(size_used1 != size_used2){
248 xbt_os_timer_stop(timer);
249 mc_comp_times->stacks_sizes_comparison_time = xbt_os_timer_elapsed(timer);
251 XBT_DEBUG("Different size used in stacks : %zu - %zu", size_used1, size_used2);
256 XBT_VERB("Different size used in stacks : %zu - %zu", size_used1, size_used2);
259 xbt_os_timer_free(timer);
260 xbt_os_timer_stop(global_timer);
261 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
262 xbt_os_timer_free(global_timer);
275 xbt_os_timer_stop(timer);
276 xbt_os_timer_start(timer);
279 int heap_index = 0, data_libsimgrid_index = 0, data_program_index = 0;
282 /* Get index of regions */
283 while(i < s1->num_reg){
284 switch(s1->region_type[i]){
290 data_libsimgrid_index = i;
292 while( i < s1->num_reg && s1->region_type[i] == 1)
296 data_program_index = i;
298 while( i < s1->num_reg && s1->region_type[i] == 2)
304 /* Init heap information used in heap comparison algorithm */
305 init_heap_information((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data);
307 /* Compare binary global variables */
308 is_diff = compare_global_variables(s1->region_type[data_program_index], s1->regions[data_program_index]->data, s2->regions[data_program_index]->data);
311 xbt_os_timer_stop(timer);
312 mc_comp_times->binary_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
313 XBT_DEBUG("Different global variables in binary");
317 XBT_VERB("Different global variables in binary");
320 xbt_os_timer_free(timer);
321 xbt_os_timer_stop(global_timer);
322 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
323 xbt_os_timer_free(global_timer);
334 xbt_os_timer_stop(timer);
335 xbt_os_timer_start(timer);
338 /* Compare libsimgrid global variables */
339 is_diff = compare_global_variables(s1->region_type[data_libsimgrid_index], s1->regions[data_libsimgrid_index]->data, s2->regions[data_libsimgrid_index]->data);
342 xbt_os_timer_stop(timer);
343 mc_comp_times->libsimgrid_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
344 XBT_DEBUG("Different global variables in libsimgrid");
348 XBT_VERB("Different global variables in libsimgrid");
351 xbt_os_timer_free(timer);
352 xbt_os_timer_stop(global_timer);
353 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
354 xbt_os_timer_free(global_timer);
365 xbt_os_timer_stop(timer);
366 xbt_os_timer_start(timer);
370 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
371 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
372 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
374 void *heap1 = s1->regions[heap_index]->data, *heap2 = s2->regions[heap_index]->data;
376 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data, &stacks1, &stacks2, &equals)){
379 xbt_os_timer_stop(timer);
380 mc_comp_times->heap_comparison_time = xbt_os_timer_elapsed(timer);
381 XBT_DEBUG("Different heap (mmalloc_compare)");
385 xbt_os_timer_free(timer);
386 xbt_dynar_free(&stacks1);
387 xbt_dynar_free(&stacks2);
388 xbt_dynar_free(&equals);
391 XBT_VERB("Different heap (mmalloc_compare)");
394 xbt_os_timer_stop(global_timer);
395 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
396 xbt_os_timer_free(global_timer);
405 xbt_os_timer_stop(timer);
410 xbt_os_timer_start(timer);
413 /* Stacks comparison */
414 unsigned int cursor = 0;
415 stack_region_t stack_region1, stack_region2;
416 int diff = 0, diff_local = 0;
420 while(cursor < xbt_dynar_length(stacks1)){
421 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
422 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
423 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
424 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
425 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
427 if(diff > 0){ /* Differences may be due to padding */
428 diff_local = compare_local_variables(((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->local_variables->data, ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->local_variables->data, equals);
432 xbt_os_timer_stop(timer);
433 mc_comp_times->stacks_comparison_time = xbt_os_timer_elapsed(timer);
435 XBT_DEBUG("Different local variables between stacks %d", cursor + 1);
439 xbt_dynar_free(&stacks1);
440 xbt_dynar_free(&stacks2);
441 xbt_dynar_free(&equals);
444 XBT_VERB("Different local variables between stacks %d", cursor + 1);
447 xbt_os_timer_free(timer);
448 xbt_os_timer_stop(global_timer);
449 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
450 xbt_os_timer_free(global_timer);
462 xbt_dynar_free(&stacks1);
463 xbt_dynar_free(&stacks2);
464 xbt_dynar_free(&equals);
466 xbt_os_timer_free(timer);
469 xbt_os_timer_stop(global_timer);
470 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
473 xbt_os_timer_free(global_timer);
476 print_comparison_times();
486 static int is_stack_ignore_variable(char *frame, char *var_name){
488 unsigned int cursor = 0;
490 int end = xbt_dynar_length(mc_stack_comparison_ignore) - 1;
491 mc_stack_ignore_variable_t current_var;
494 cursor = (start + end) / 2;
495 current_var = (mc_stack_ignore_variable_t)xbt_dynar_get_as(mc_stack_comparison_ignore, cursor, mc_stack_ignore_variable_t);
496 if(strcmp(current_var->frame, frame) == 0 || strcmp(current_var->frame, "*") == 0){
497 if(strcmp(current_var->var_name, var_name) == 0)
499 if(strcmp(current_var->var_name, var_name) < 0)
501 if(strcmp(current_var->var_name, var_name) > 0)
503 }else if(strcmp(current_var->frame, frame) < 0){
505 }else if(strcmp(current_var->frame, frame) > 0){
513 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
515 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
516 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
518 xbt_dynar_t s_tokens1, s_tokens2;
519 unsigned int cursor = 0;
521 char *ip1 = NULL, *ip2 = NULL;
523 while(cursor < xbt_dynar_length(tokens1)){
524 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
525 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
526 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
527 if((strcmp(xbt_dynar_get_as(s_tokens1, 0, char *), "ip") == 0) && (strcmp(xbt_dynar_get_as(s_tokens2, 0, char *), "ip") == 0)){
530 ip1 = strdup(xbt_dynar_get_as(s_tokens1, 1, char *));
531 ip2 = strdup(xbt_dynar_get_as(s_tokens2, 1, char *));
533 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
534 /* Ignore this variable ? */
535 if(is_stack_ignore_variable(ip1, xbt_dynar_get_as(s_tokens1, 0, char *)) && is_stack_ignore_variable(ip2, xbt_dynar_get_as(s_tokens2, 0, char *))){
536 xbt_dynar_free(&s_tokens1);
537 xbt_dynar_free(&s_tokens2);
541 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
542 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
543 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
544 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
545 XBT_VERB("Variable %s is different between stacks in %s : %s - %s", xbt_dynar_get_as(s_tokens1, 0, char *), ip1, xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *));
546 xbt_dynar_free(&s_tokens1);
547 xbt_dynar_free(&s_tokens2);
548 xbt_dynar_free(&tokens1);
549 xbt_dynar_free(&tokens2);
556 xbt_dynar_free(&s_tokens1);
557 xbt_dynar_free(&s_tokens2);
564 xbt_dynar_free(&tokens1);
565 xbt_dynar_free(&tokens2);
570 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
572 unsigned int cursor = 0;
574 int end = xbt_dynar_length(equals) - 1;
575 heap_equality_t current_equality;
578 cursor = (start + end) / 2;
579 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
580 if(current_equality->address1 == a1){
581 if(current_equality->address2 == a2)
583 if(current_equality->address2 < a2)
585 if(current_equality->address2 > a2)
588 if(current_equality->address1 < a1)
590 if(current_equality->address1 > a1)
599 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
602 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
603 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
606 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
608 while(k < size_used1){
609 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
610 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
611 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
612 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
613 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
614 if((addr_pointed1 > std_heap) && (addr_pointed1 < (void *)((char *)std_heap + STD_HEAP_SIZE)) && (addr_pointed2 > std_heap) && (addr_pointed2 < (void *)((char *)std_heap + STD_HEAP_SIZE))){
615 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
629 int MC_compare_snapshots(void *s1, void *s2){
631 MC_ignore_stack("self", "simcall_BODY_mc_snapshot");
633 return simcall_mc_compare_snapshots(s1, s2);
637 void print_comparison_times(){
638 XBT_DEBUG("*** Comparison times ***");
639 XBT_DEBUG("- Nb processes : %f", mc_comp_times->nb_processes_comparison_time);
640 XBT_DEBUG("- Nb chunks used : %f", mc_comp_times->chunks_used_comparison_time);
641 XBT_DEBUG("- Stacks sizes : %f", mc_comp_times->stacks_sizes_comparison_time);
642 XBT_DEBUG("- Binary global variables : %f", mc_comp_times->binary_global_variables_comparison_time);
643 XBT_DEBUG("- Libsimgrid global variables : %f", mc_comp_times->libsimgrid_global_variables_comparison_time);
644 XBT_DEBUG("- Heap : %f", mc_comp_times->heap_comparison_time);
645 XBT_DEBUG("- Stacks : %f", mc_comp_times->stacks_comparison_time);