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 snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2, mc_comparison_times_t ct1, mc_comparison_times_t ct2){
152 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
156 int errors = 0, i = 0;
158 if(s1->num_reg != s2->num_reg){
159 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
160 XBT_VERB("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
167 int heap_index = 0, data_libsimgrid_index = 0, data_program_index = 0;
169 /* Get index of regions */
170 while(i < s1->num_reg){
171 switch(s1->regions[i]->type){
177 data_libsimgrid_index = i;
179 while( i < s1->num_reg && s1->regions[i]->type == 1)
183 data_program_index = i;
185 while( i < s1->num_reg && s1->regions[i]->type == 2)
192 ct1->nb_comparisons++;
194 ct2->nb_comparisons++;
196 xbt_os_timer_t global_timer = xbt_os_timer_new();
197 xbt_os_timer_t timer = xbt_os_timer_new();
199 xbt_os_timer_start(global_timer);
201 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
202 xbt_os_timer_start(timer);
204 /* Compare number of blocks/fragments used in each heap */
205 size_t chunks_used1 = mmalloc_get_chunks_used((xbt_mheap_t)s1->regions[heap_index]->data);
206 size_t chunks_used2 = mmalloc_get_chunks_used((xbt_mheap_t)s2->regions[heap_index]->data);
207 if(chunks_used1 != chunks_used2){
208 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
209 xbt_os_timer_stop(timer);
211 xbt_dynar_push_as(ct1->chunks_used_comparison_times, double, xbt_os_timer_elapsed(timer));
213 xbt_dynar_push_as(ct2->chunks_used_comparison_times, double, xbt_os_timer_elapsed(timer));
214 XBT_DEBUG("Different number of chunks used in each heap : %zu - %zu", chunks_used1, chunks_used2);
217 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
218 XBT_VERB("Different number of chunks used in each heap : %zu - %zu", chunks_used1, chunks_used2);
220 xbt_os_timer_free(timer);
221 xbt_os_timer_stop(global_timer);
223 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
225 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
226 xbt_os_timer_free(global_timer);
234 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
235 xbt_os_timer_stop(timer);
238 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
239 xbt_os_timer_start(timer);
241 /* Compare size of stacks */
242 unsigned int cursor = 0;
243 void *addr_stack1, *addr_stack2;
245 size_t size_used1, size_used2;
247 while(cursor < xbt_dynar_length(stacks_areas)){
248 addr_stack1 = (char *)s1->regions[heap_index]->data + ((char *)((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->address - (char *)std_heap);
249 addr_stack2 = (char *)s2->regions[heap_index]->data + ((char *)((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->address - (char *)std_heap);
250 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
251 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
252 size_used1 = ((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->size - ((char*)sp1 - (char*)addr_stack1);
253 size_used2 = ((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->size - ((char*)sp2 - (char*)addr_stack2);
254 if(size_used1 != size_used2){
255 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
257 xbt_os_timer_stop(timer);
259 xbt_dynar_push_as(ct1->stacks_sizes_comparison_times, double, xbt_os_timer_elapsed(timer));
261 xbt_dynar_push_as(ct2->stacks_sizes_comparison_times, double, xbt_os_timer_elapsed(timer));
263 XBT_DEBUG("Different size used in stacks : %zu - %zu", size_used1, size_used2);
267 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
268 XBT_VERB("Different size used in stacks : %zu - %zu", size_used1, size_used2);
270 xbt_os_timer_free(timer);
271 xbt_os_timer_stop(global_timer);
273 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
275 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
276 xbt_os_timer_free(global_timer);
287 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
289 xbt_os_timer_stop(timer);
290 xbt_os_timer_start(timer);
293 /* Compare binary global variables */
294 is_diff = compare_global_variables(s1->regions[data_program_index]->type, s1->regions[data_program_index]->data, s2->regions[data_program_index]->data);
296 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
297 xbt_os_timer_stop(timer);
299 xbt_dynar_push_as(ct1->binary_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
301 xbt_dynar_push_as(ct2->binary_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
302 XBT_DEBUG("Different global variables in binary");
305 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
306 XBT_VERB("Different global variables in binary");
308 xbt_os_timer_free(timer);
309 xbt_os_timer_stop(global_timer);
311 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
313 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
314 xbt_os_timer_free(global_timer);
322 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
324 xbt_os_timer_stop(timer);
325 xbt_os_timer_start(timer);
328 /* Compare libsimgrid global variables */
329 is_diff = compare_global_variables(s1->regions[data_libsimgrid_index]->type, s1->regions[data_libsimgrid_index]->data, s2->regions[data_libsimgrid_index]->data);
331 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
332 xbt_os_timer_stop(timer);
334 xbt_dynar_push_as(ct1->libsimgrid_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
336 xbt_dynar_push_as(ct2->libsimgrid_global_variables_comparison_times, double, xbt_os_timer_elapsed(timer));
337 XBT_DEBUG("Different global variables in libsimgrid");
340 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
341 XBT_VERB("Different global variables in libsimgrid");
343 xbt_os_timer_free(timer);
344 xbt_os_timer_stop(global_timer);
346 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
348 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
349 xbt_os_timer_free(global_timer);
357 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
359 xbt_os_timer_stop(timer);
360 xbt_os_timer_start(timer);
364 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
365 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
366 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
368 void *heap1 = s1->regions[heap_index]->data, *heap2 = s2->regions[heap_index]->data;
370 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data, &stacks1, &stacks2, &equals)){
372 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
373 xbt_os_timer_stop(timer);
375 xbt_dynar_push_as(ct1->heap_comparison_times, double, xbt_os_timer_elapsed(timer));
377 xbt_dynar_push_as(ct2->heap_comparison_times, double, xbt_os_timer_elapsed(timer));
378 XBT_DEBUG("Different heap (mmalloc_compare)");
382 xbt_os_timer_free(timer);
383 xbt_dynar_free(&stacks1);
384 xbt_dynar_free(&stacks2);
385 xbt_dynar_free(&equals);
387 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
388 XBT_VERB("Different heap (mmalloc_compare)");
390 xbt_os_timer_stop(global_timer);
392 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
394 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
395 xbt_os_timer_free(global_timer);
402 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
403 xbt_os_timer_stop(timer);
406 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
407 xbt_os_timer_start(timer);
409 /* Stacks comparison */
411 stack_region_t stack_region1, stack_region2;
412 int diff = 0, diff_local = 0;
415 while(cursor < xbt_dynar_length(stacks1)){
416 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
417 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
418 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
419 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
420 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
422 if(diff > 0){ /* Differences may be due to padding */
423 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);
425 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
427 xbt_os_timer_stop(timer);
429 xbt_dynar_push_as(ct1->stacks_comparison_times, double, xbt_os_timer_elapsed(timer));
431 xbt_dynar_push_as(ct2->stacks_comparison_times, double, xbt_os_timer_elapsed(timer));
433 XBT_DEBUG("Different local variables between stacks %d", cursor + 1);
437 xbt_dynar_free(&stacks1);
438 xbt_dynar_free(&stacks2);
439 xbt_dynar_free(&equals);
441 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
442 XBT_VERB("Different local variables between stacks %d", cursor + 1);
444 xbt_os_timer_free(timer);
445 xbt_os_timer_stop(global_timer);
447 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
449 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, 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 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
467 xbt_os_timer_free(timer);
469 if(!XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
470 xbt_os_timer_stop(global_timer);
472 xbt_dynar_push_as(ct1->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
474 xbt_dynar_push_as(ct2->snapshot_comparison_times, double, xbt_os_timer_elapsed(global_timer));
476 xbt_os_timer_free(global_timer);
485 static int is_stack_ignore_variable(char *frame, char *var_name){
487 unsigned int cursor = 0;
489 int end = xbt_dynar_length(mc_stack_comparison_ignore) - 1;
490 mc_stack_ignore_variable_t current_var;
493 cursor = (start + end) / 2;
494 current_var = (mc_stack_ignore_variable_t)xbt_dynar_get_as(mc_stack_comparison_ignore, cursor, mc_stack_ignore_variable_t);
495 if(strcmp(current_var->frame, frame) == 0 || strcmp(current_var->frame, "*") == 0){
496 if(strcmp(current_var->var_name, var_name) == 0)
498 if(strcmp(current_var->var_name, var_name) < 0)
500 if(strcmp(current_var->var_name, var_name) > 0)
502 }else if(strcmp(current_var->frame, frame) < 0){
504 }else if(strcmp(current_var->frame, frame) > 0){
512 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
514 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
515 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
517 xbt_dynar_t s_tokens1, s_tokens2;
518 unsigned int cursor = 0;
520 char *ip1 = NULL, *ip2 = NULL;
522 while(cursor < xbt_dynar_length(tokens1)){
523 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
524 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
525 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
526 if((strcmp(xbt_dynar_get_as(s_tokens1, 0, char *), "ip") == 0) && (strcmp(xbt_dynar_get_as(s_tokens2, 0, char *), "ip") == 0)){
527 ip1 = strdup(xbt_dynar_get_as(s_tokens1, 1, char *));
528 ip2 = strdup(xbt_dynar_get_as(s_tokens2, 1, char *));
530 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
531 /* Ignore this variable ? */
532 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 *))){
533 xbt_dynar_free(&s_tokens1);
534 xbt_dynar_free(&s_tokens2);
538 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
539 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
540 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
541 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
542 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 *));
543 xbt_dynar_free(&s_tokens1);
544 xbt_dynar_free(&s_tokens2);
549 xbt_dynar_free(&s_tokens1);
550 xbt_dynar_free(&s_tokens2);
554 xbt_dynar_free(&tokens1);
555 xbt_dynar_free(&tokens2);
560 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
562 unsigned int cursor = 0;
564 int end = xbt_dynar_length(equals) - 1;
565 heap_equality_t current_equality;
568 cursor = (start + end) / 2;
569 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
570 if(current_equality->address1 == a1){
571 if(current_equality->address2 == a2)
573 if(current_equality->address2 < a2)
575 if(current_equality->address2 > a2)
578 if(current_equality->address1 < a1)
580 if(current_equality->address1 > a1)
589 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
592 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
593 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
596 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
598 while(k < size_used1){
599 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
600 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
601 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
602 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
603 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
604 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))){
605 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
619 int MC_compare_snapshots(void *s1, void *s2){
621 MC_ignore_stack("self", "simcall_BODY_mc_snapshot");
623 return simcall_mc_compare_snapshots(s1, s2);