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, xbt_dynar_t equals){
47 unsigned int cursor = 0;
50 global_variable_t current_var;
52 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
55 if(region_type == 1){ /* libsimgrid */
56 xbt_dynar_foreach(mc_global_variables, cursor, current_var){
57 if(current_var->address < start_data_libsimgrid)
59 offset = (char *)current_var->address - (char *)start_data_libsimgrid;
61 while(i < current_var->size){
62 if(memcmp((char*)d1 + offset + i, (char*)d2 + offset + i, 1) != 0){
63 pointer_align = (i / sizeof(void*)) * sizeof(void*);
64 addr_pointed1 = *((void **)((char *)d1 + offset + pointer_align));
65 addr_pointed2 = *((void **)((char *)d2 + offset + pointer_align));
66 if((addr_pointed1 > start_plt_libsimgrid && addr_pointed1 < end_plt_libsimgrid) || (addr_pointed2 > start_plt_libsimgrid && addr_pointed2 < end_plt_libsimgrid)){
67 i = current_var->size;
70 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)){
71 res_compare = compare_area(addr_pointed1, addr_pointed2, NULL, equals);
74 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);
80 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);
91 xbt_dynar_foreach(mc_global_variables, cursor, current_var){
92 if(current_var->address > start_data_libsimgrid)
94 offset = (char *)current_var->address - (char *)start_data_binary;
96 while(i < current_var->size){
97 if(memcmp((char*)d1 + offset + i, (char*)d2 + offset + i, 1) != 0){
98 pointer_align = (i / sizeof(void*)) * sizeof(void*);
99 addr_pointed1 = *((void **)((char *)d1 + offset + pointer_align));
100 addr_pointed2 = *((void **)((char *)d2 + offset + pointer_align));
101 if((addr_pointed1 > start_plt_binary && addr_pointed1 < end_plt_binary) || (addr_pointed2 > start_plt_binary && addr_pointed2 < end_plt_binary)){
102 i = current_var->size;
105 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)){
106 res_compare = compare_area(addr_pointed1, addr_pointed2, NULL, equals);
107 if(res_compare == 1){
109 XBT_VERB("Different global variable in binary : %s at addresses %p - %p (size = %zu)", current_var->name, (char *)d1+offset, (char *)d2+offset, current_var->size);
115 XBT_VERB("Different global variable in binary : %s at addresses %p - %p (size = %zu)", current_var->name, (char *)d1+offset, (char *)d2+offset, current_var->size);
130 static int heap_region_compare(void *d1, void *d2, size_t size){
134 for(i=0; i<size; i++){
135 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
136 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
137 XBT_VERB("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
146 static void stack_region_free(stack_region_t s){
148 xbt_free(s->process_name);
153 void stack_region_free_voidp(void *s){
154 stack_region_free((stack_region_t) * (void **) s);
157 static void heap_equality_free(heap_equality_t e){
163 void heap_equality_free_voidp(void *e){
164 heap_equality_free((heap_equality_t) * (void **) e);
167 int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall,
168 mc_snapshot_t s1, mc_snapshot_t s2){
169 return snapshot_compare(s1, s2);
172 int get_heap_region_index(mc_snapshot_t s){
174 while(i < s->num_reg){
175 switch(s->regions[i]->type){
187 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
189 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
195 xbt_os_timer_t global_timer = xbt_os_timer_new();
196 xbt_os_timer_t timer = xbt_os_timer_new();
198 xbt_os_timer_start(global_timer);
201 xbt_os_timer_start(timer);
204 /* Compare number of processes */
205 if(s1->nb_processes != s2->nb_processes){
207 xbt_os_timer_stop(timer);
208 mc_comp_times->nb_processes_comparison_time = xbt_os_timer_elapsed(timer);
209 XBT_DEBUG("Different number of processes : %d - %d", s1->nb_processes, s2->nb_processes);
213 XBT_VERB("Different number of processes : %d - %d", s1->nb_processes, s2->nb_processes);
216 xbt_os_timer_free(timer);
217 xbt_os_timer_stop(global_timer);
218 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
219 xbt_os_timer_free(global_timer);
228 /* Compare number of blocks/fragments used in each heap */
229 if(s1->heap_chunks_used != s2->heap_chunks_used){
231 xbt_os_timer_stop(timer);
232 mc_comp_times->chunks_used_comparison_time = xbt_os_timer_elapsed(timer);
233 XBT_DEBUG("Different number of chunks used in each heap : %zu - %zu", s1->heap_chunks_used, s2->heap_chunks_used);
237 XBT_VERB("Different number of chunks used in each heap : %zu - %zu", s1->heap_chunks_used, s2->heap_chunks_used);
240 xbt_os_timer_free(timer);
241 xbt_os_timer_stop(global_timer);
242 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
243 xbt_os_timer_free(global_timer);
252 xbt_os_timer_stop(timer);
257 xbt_os_timer_start(timer);
260 /* Compare size of stacks */
262 size_t size_used1, size_used2;
264 while(i < xbt_dynar_length(s1->stacks)){
265 size_used1 = s1->stack_sizes[i];
266 size_used2 = s2->stack_sizes[i];
267 if(size_used1 != size_used2){
270 xbt_os_timer_stop(timer);
271 mc_comp_times->stacks_sizes_comparison_time = xbt_os_timer_elapsed(timer);
273 XBT_DEBUG("Different size used in stacks : %zu - %zu", size_used1, size_used2);
278 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);
283 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
284 xbt_os_timer_free(global_timer);
297 xbt_os_timer_stop(timer);
298 xbt_os_timer_start(timer);
301 int heap_index = 0, data_libsimgrid_index = 0, data_program_index = 0;
304 /* Get index of regions */
305 while(i < s1->num_reg){
306 switch(s1->region_type[i]){
312 data_libsimgrid_index = i;
314 while( i < s1->num_reg && s1->region_type[i] == 1)
318 data_program_index = i;
320 while( i < s1->num_reg && s1->region_type[i] == 2)
326 /* Init heap information used in heap comparison algorithm */
327 init_heap_information((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data);
329 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
331 /* Compare binary global variables */
332 is_diff = compare_global_variables(s1->region_type[data_program_index], s1->regions[data_program_index]->data, s2->regions[data_program_index]->data, equals);
335 xbt_os_timer_stop(timer);
336 mc_comp_times->binary_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
337 XBT_DEBUG("Different global variables in binary");
341 XBT_VERB("Different global variables in binary");
344 xbt_os_timer_free(timer);
345 xbt_os_timer_stop(global_timer);
346 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
347 xbt_os_timer_free(global_timer);
358 xbt_os_timer_stop(timer);
359 xbt_os_timer_start(timer);
362 /* Compare libsimgrid global variables */
363 is_diff = compare_global_variables(s1->region_type[data_libsimgrid_index], s1->regions[data_libsimgrid_index]->data, s2->regions[data_libsimgrid_index]->data, equals);
366 xbt_os_timer_stop(timer);
367 mc_comp_times->libsimgrid_global_variables_comparison_time = xbt_os_timer_elapsed(timer);
368 XBT_DEBUG("Different global variables in libsimgrid");
372 XBT_VERB("Different global variables in libsimgrid");
375 xbt_os_timer_free(timer);
376 xbt_os_timer_stop(global_timer);
377 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
378 xbt_os_timer_free(global_timer);
389 xbt_os_timer_stop(timer);
390 xbt_os_timer_start(timer);
394 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
395 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
397 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data, &stacks1, &stacks2, equals)){
400 xbt_os_timer_stop(timer);
401 mc_comp_times->heap_comparison_time = xbt_os_timer_elapsed(timer);
402 XBT_DEBUG("Different heap (mmalloc_compare)");
406 xbt_os_timer_free(timer);
407 xbt_dynar_free(&stacks1);
408 xbt_dynar_free(&stacks2);
409 xbt_dynar_free(&equals);
412 XBT_VERB("Different heap (mmalloc_compare)");
415 xbt_os_timer_stop(global_timer);
416 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
417 xbt_os_timer_free(global_timer);
426 xbt_os_timer_stop(timer);
431 xbt_os_timer_start(timer);
434 /* Stacks comparison */
435 unsigned int cursor = 0;
439 while(cursor < xbt_dynar_length(stacks1)){
440 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 xbt_os_timer_stop(timer);
445 mc_comp_times->stacks_comparison_time = xbt_os_timer_elapsed(timer);
447 XBT_DEBUG("Different local variables between stacks %d", cursor + 1);
451 xbt_dynar_free(&stacks1);
452 xbt_dynar_free(&stacks2);
453 xbt_dynar_free(&equals);
456 XBT_VERB("Different local variables between stacks %d", cursor + 1);
459 xbt_os_timer_free(timer);
460 xbt_os_timer_stop(global_timer);
461 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
462 xbt_os_timer_free(global_timer);
473 xbt_dynar_free(&stacks1);
474 xbt_dynar_free(&stacks2);
475 xbt_dynar_free(&equals);
477 xbt_os_timer_free(timer);
480 xbt_os_timer_stop(global_timer);
481 mc_snapshot_comparison_time = xbt_os_timer_elapsed(global_timer);
484 xbt_os_timer_free(global_timer);
487 print_comparison_times();
497 static int is_stack_ignore_variable(char *frame, char *var_name){
499 unsigned int cursor = 0;
501 int end = xbt_dynar_length(mc_stack_comparison_ignore) - 1;
502 mc_stack_ignore_variable_t current_var;
505 cursor = (start + end) / 2;
506 current_var = (mc_stack_ignore_variable_t)xbt_dynar_get_as(mc_stack_comparison_ignore, cursor, mc_stack_ignore_variable_t);
507 if(strcmp(current_var->frame, frame) == 0 || strcmp(current_var->frame, "*") == 0){
508 if(strcmp(current_var->var_name, var_name) == 0)
510 if(strcmp(current_var->var_name, var_name) < 0)
512 if(strcmp(current_var->var_name, var_name) > 0)
514 }else if(strcmp(current_var->frame, frame) < 0){
516 }else if(strcmp(current_var->frame, frame) > 0){
524 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
526 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
527 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
529 xbt_dynar_t s_tokens1, s_tokens2;
530 unsigned int cursor = 0;
532 char *ip1 = NULL, *ip2 = NULL;
534 while(cursor < xbt_dynar_length(tokens1)){
535 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
536 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
537 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
538 if((strcmp(xbt_dynar_get_as(s_tokens1, 0, char *), "ip") == 0) && (strcmp(xbt_dynar_get_as(s_tokens2, 0, char *), "ip") == 0)){
541 ip1 = strdup(xbt_dynar_get_as(s_tokens1, 1, char *));
542 ip2 = strdup(xbt_dynar_get_as(s_tokens2, 1, char *));
544 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
545 /* Ignore this variable ? */
546 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 *))){
547 xbt_dynar_free(&s_tokens1);
548 xbt_dynar_free(&s_tokens2);
552 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
553 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
554 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
555 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
556 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 *));
557 xbt_dynar_free(&s_tokens1);
558 xbt_dynar_free(&s_tokens2);
559 xbt_dynar_free(&tokens1);
560 xbt_dynar_free(&tokens2);
567 xbt_dynar_free(&s_tokens1);
568 xbt_dynar_free(&s_tokens2);
575 xbt_dynar_free(&tokens1);
576 xbt_dynar_free(&tokens2);
581 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
583 unsigned int cursor = 0;
585 int end = xbt_dynar_length(equals) - 1;
586 heap_equality_t current_equality;
589 cursor = (start + end) / 2;
590 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
591 if(current_equality->address1 == a1){
592 if(current_equality->address2 == a2)
594 if(current_equality->address2 < a2)
596 if(current_equality->address2 > a2)
599 if(current_equality->address1 < a1)
601 if(current_equality->address1 > a1)
610 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
613 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
614 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
617 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
619 while(k < size_used1){
620 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
621 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
622 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
623 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
624 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
625 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))){
626 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
640 int MC_compare_snapshots(void *s1, void *s2){
642 MC_ignore_stack("self", "simcall_BODY_mc_snapshot");
644 return simcall_mc_compare_snapshots(s1, s2);
648 void print_comparison_times(){
649 XBT_DEBUG("*** Comparison times ***");
650 XBT_DEBUG("- Nb processes : %f", mc_comp_times->nb_processes_comparison_time);
651 XBT_DEBUG("- Nb chunks used : %f", mc_comp_times->chunks_used_comparison_time);
652 XBT_DEBUG("- Stacks sizes : %f", mc_comp_times->stacks_sizes_comparison_time);
653 XBT_DEBUG("- Binary global variables : %f", mc_comp_times->binary_global_variables_comparison_time);
654 XBT_DEBUG("- Libsimgrid global variables : %f", mc_comp_times->libsimgrid_global_variables_comparison_time);
655 XBT_DEBUG("- Heap : %f", mc_comp_times->heap_comparison_time);
656 XBT_DEBUG("- Stacks : %f", mc_comp_times->stacks_comparison_time);