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, NULL, NULL);
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, mc_comparison_times_t ct1, mc_comparison_times_t ct2){
167 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
171 int errors = 0, i = 0;
173 if(s1->num_reg != s2->num_reg){
174 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
175 XBT_VERB("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
182 int heap_index = 0, data_libsimgrid_index = 0, data_program_index = 0;
184 /* Get index of regions */
185 while(i < s1->num_reg){
186 switch(s1->regions[i]->type){
192 data_libsimgrid_index = i;
194 while( i < s1->num_reg && s1->regions[i]->type == 1)
198 data_program_index = i;
200 while( i < s1->num_reg && s1->regions[i]->type == 2)
207 ct1->nb_comparisons++;
209 ct2->nb_comparisons++;
211 xbt_os_timer_t global_timer = xbt_os_timer_new();
212 xbt_os_timer_t timer = xbt_os_timer_new();
214 xbt_os_timer_start(global_timer);
216 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
217 xbt_os_timer_start(timer);
219 /* Compare number of blocks/fragments used in each heap */
221 if(s1->heap_chunks_used != s2->heap_chunks_used){
223 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
224 xbt_os_timer_stop(timer);
226 xbt_dynar_push_as(ct1->chunks_used_comparison_times, double, xbt_os_timer_elapsed(timer));
228 xbt_dynar_push_as(ct2->chunks_used_comparison_times, double, xbt_os_timer_elapsed(timer));
229 XBT_DEBUG("Different number of chunks used in each heap : %zu - %zu", s1->heap_chunks_used, s2->heap_chunks_used);
232 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
233 XBT_VERB("Different number of chunks used in each heap : %zu - %zu", s1->heap_chunks_used, s2->heap_chunks_used);
235 xbt_os_timer_free(timer);
236 xbt_os_timer_stop(global_timer);
238 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
240 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
241 xbt_os_timer_free(global_timer);
250 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
251 xbt_os_timer_stop(timer);
254 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
255 xbt_os_timer_start(timer);
257 /* Compare size of stacks */
259 unsigned int cursor = 0;
260 size_t size_used1, size_used2;
262 while(cursor < xbt_dynar_length(stacks_areas)){
263 size_used1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->size_used;
264 size_used2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->size_used;
265 if(size_used1 != size_used2){
266 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
268 xbt_os_timer_stop(timer);
270 xbt_dynar_push_as(ct1->stacks_sizes_comparison_times, double, xbt_os_timer_elapsed(timer));
272 xbt_dynar_push_as(ct2->stacks_sizes_comparison_times, double, xbt_os_timer_elapsed(timer));
274 XBT_DEBUG("Different size used in stacks : %zu - %zu", size_used1, size_used2);
278 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
279 XBT_VERB("Different size used in stacks : %zu - %zu", size_used1, size_used2);
281 xbt_os_timer_free(timer);
282 xbt_os_timer_stop(global_timer);
284 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
286 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
287 xbt_os_timer_free(global_timer);
298 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
300 xbt_os_timer_stop(timer);
301 xbt_os_timer_start(timer);
304 /* Compare binary global variables */
306 is_diff = compare_global_variables(s1->regions[data_program_index]->type, s1->regions[data_program_index]->data, s2->regions[data_program_index]->data);
308 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
309 xbt_os_timer_stop(timer);
311 xbt_dynar_push_as(ct1->binary_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
313 xbt_dynar_push_as(ct2->binary_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
314 XBT_DEBUG("Different global variables in binary");
317 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
318 XBT_VERB("Different global variables in binary");
320 xbt_os_timer_free(timer);
321 xbt_os_timer_stop(global_timer);
323 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
325 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
326 xbt_os_timer_free(global_timer);
335 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
337 xbt_os_timer_stop(timer);
338 xbt_os_timer_start(timer);
341 /* Compare libsimgrid global variables */
343 is_diff = compare_global_variables(s1->regions[data_libsimgrid_index]->type, s1->regions[data_libsimgrid_index]->data, s2->regions[data_libsimgrid_index]->data);
345 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
346 xbt_os_timer_stop(timer);
348 xbt_dynar_push_as(ct1->libsimgrid_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
350 xbt_dynar_push_as(ct2->libsimgrid_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
351 XBT_DEBUG("Different global variables in libsimgrid");
354 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
355 XBT_VERB("Different global variables in libsimgrid");
357 xbt_os_timer_free(timer);
358 xbt_os_timer_stop(global_timer);
360 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
362 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
363 xbt_os_timer_free(global_timer);
372 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
374 xbt_os_timer_stop(timer);
375 xbt_os_timer_start(timer);
380 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
381 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
382 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
384 void *heap1 = s1->regions[heap_index]->data, *heap2 = s2->regions[heap_index]->data;
386 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data, &stacks1, &stacks2, &equals)){
388 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
389 xbt_os_timer_stop(timer);
391 xbt_dynar_push_as(ct1->heap_comparison_times, double, xbt_os_timer_elapsed(timer));
393 xbt_dynar_push_as(ct2->heap_comparison_times, double, xbt_os_timer_elapsed(timer));
394 XBT_DEBUG("Different heap (mmalloc_compare)");
398 xbt_os_timer_free(timer);
399 xbt_dynar_free(&stacks1);
400 xbt_dynar_free(&stacks2);
401 xbt_dynar_free(&equals);
403 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
404 XBT_VERB("Different heap (mmalloc_compare)");
406 xbt_os_timer_stop(global_timer);
408 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
410 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
411 xbt_os_timer_free(global_timer);
419 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
420 xbt_os_timer_stop(timer);
423 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
424 xbt_os_timer_start(timer);
426 /* Stacks comparison */
429 stack_region_t stack_region1, stack_region2;
430 int diff = 0, diff_local = 0;
434 while(cursor < xbt_dynar_length(stacks1)){
435 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
436 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
437 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
438 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
439 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
441 if(diff > 0){ /* Differences may be due to padding */
442 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);
444 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
446 xbt_os_timer_stop(timer);
448 xbt_dynar_push_as(ct1->stacks_comparison_times, double, xbt_os_timer_elapsed(timer));
450 xbt_dynar_push_as(ct2->stacks_comparison_times, double, xbt_os_timer_elapsed(timer));
452 XBT_DEBUG("Different local variables between stacks %d", cursor + 1);
456 xbt_dynar_free(&stacks1);
457 xbt_dynar_free(&stacks2);
458 xbt_dynar_free(&equals);
460 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
461 XBT_VERB("Different local variables between stacks %d", cursor + 1);
463 xbt_os_timer_free(timer);
464 xbt_os_timer_stop(global_timer);
466 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
468 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
469 xbt_os_timer_free(global_timer);
481 xbt_dynar_free(&stacks1);
482 xbt_dynar_free(&stacks2);
483 xbt_dynar_free(&equals);
485 xbt_os_timer_free(timer);
487 if(!XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
488 xbt_os_timer_stop(global_timer);
490 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
492 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
494 xbt_os_timer_free(global_timer);
503 static int is_stack_ignore_variable(char *frame, char *var_name){
505 unsigned int cursor = 0;
507 int end = xbt_dynar_length(mc_stack_comparison_ignore) - 1;
508 mc_stack_ignore_variable_t current_var;
511 cursor = (start + end) / 2;
512 current_var = (mc_stack_ignore_variable_t)xbt_dynar_get_as(mc_stack_comparison_ignore, cursor, mc_stack_ignore_variable_t);
513 if(strcmp(current_var->frame, frame) == 0 || strcmp(current_var->frame, "*") == 0){
514 if(strcmp(current_var->var_name, var_name) == 0)
516 if(strcmp(current_var->var_name, var_name) < 0)
518 if(strcmp(current_var->var_name, var_name) > 0)
520 }else if(strcmp(current_var->frame, frame) < 0){
522 }else if(strcmp(current_var->frame, frame) > 0){
530 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
532 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
533 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
535 xbt_dynar_t s_tokens1, s_tokens2;
536 unsigned int cursor = 0;
538 char *ip1 = NULL, *ip2 = NULL;
540 while(cursor < xbt_dynar_length(tokens1)){
541 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
542 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
543 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
544 if((strcmp(xbt_dynar_get_as(s_tokens1, 0, char *), "ip") == 0) && (strcmp(xbt_dynar_get_as(s_tokens2, 0, char *), "ip") == 0)){
547 ip1 = strdup(xbt_dynar_get_as(s_tokens1, 1, char *));
548 ip2 = strdup(xbt_dynar_get_as(s_tokens2, 1, char *));
550 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
551 /* Ignore this variable ? */
552 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 *))){
553 xbt_dynar_free(&s_tokens1);
554 xbt_dynar_free(&s_tokens2);
558 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
559 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
560 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
561 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
562 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 *));
563 xbt_dynar_free(&s_tokens1);
564 xbt_dynar_free(&s_tokens2);
565 xbt_dynar_free(&tokens1);
566 xbt_dynar_free(&tokens2);
573 xbt_dynar_free(&s_tokens1);
574 xbt_dynar_free(&s_tokens2);
581 xbt_dynar_free(&tokens1);
582 xbt_dynar_free(&tokens2);
587 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
589 unsigned int cursor = 0;
591 int end = xbt_dynar_length(equals) - 1;
592 heap_equality_t current_equality;
595 cursor = (start + end) / 2;
596 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
597 if(current_equality->address1 == a1){
598 if(current_equality->address2 == a2)
600 if(current_equality->address2 < a2)
602 if(current_equality->address2 > a2)
605 if(current_equality->address1 < a1)
607 if(current_equality->address1 > a1)
616 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
619 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
620 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
623 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
625 while(k < size_used1){
626 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
627 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
628 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
629 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
630 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
631 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))){
632 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
646 int MC_compare_snapshots(void *s1, void *s2){
648 MC_ignore_stack("self", "simcall_BODY_mc_snapshot");
650 return simcall_mc_compare_snapshots(s1, s2);