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 data_program_region_compare(void *d1, void *d2, size_t size);
14 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size);
15 static int heap_region_compare(void *d1, void *d2, size_t size);
17 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals);
18 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2);
19 static size_t ignore(void *address);
21 static void stack_region_free(stack_region_t s);
22 static void heap_equality_free(heap_equality_t e);
24 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals);
26 static size_t ignore(void *address){
27 unsigned int cursor = 0;
29 int end = xbt_dynar_length(mc_comparison_ignore) - 1;
30 mc_ignore_region_t region;
33 cursor = (start + end) / 2;
34 region = (mc_ignore_region_t)xbt_dynar_get_as(mc_comparison_ignore, cursor, mc_ignore_region_t);
35 if(region->address == address)
37 if(region->address < address)
39 if(region->address > address)
46 static int data_program_region_compare(void *d1, void *d2, size_t size){
50 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
52 for(i=0; i<size; i++){
53 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
54 pointer_align = (i / sizeof(void*)) * sizeof(void*);
55 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
56 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
57 if((addr_pointed1 > start_plt_binary && addr_pointed1 < end_plt_binary) || (addr_pointed2 > start_plt_binary && addr_pointed2 < end_plt_binary)){
60 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
66 XBT_DEBUG("Hamming distance between data program regions : %d", distance);
71 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
73 size_t i = 0, ignore_size = 0;
75 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
77 for(i=0; i<size; i++){
78 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
79 if((ignore_size = ignore((char *)start_data_libsimgrid+i)) > 0){
83 pointer_align = (i / sizeof(void*)) * sizeof(void*);
84 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
85 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
86 if((addr_pointed1 > start_plt_libsimgrid && addr_pointed1 < end_plt_libsimgrid) || (addr_pointed2 > start_plt_libsimgrid && addr_pointed2 < end_plt_libsimgrid)){
88 }else if(addr_pointed1 >= raw_heap && addr_pointed1 <= end_raw_heap && addr_pointed2 >= raw_heap && addr_pointed2 <= end_raw_heap){
91 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
92 XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
98 XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
103 static int heap_region_compare(void *d1, void *d2, size_t size){
108 for(i=0; i<size; i++){
109 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
110 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
115 XBT_DEBUG("Hamming distance between heap regions : %d (total size : %zu)", distance, size);
120 static void stack_region_free(stack_region_t s){
122 xbt_free(s->process_name);
127 void stack_region_free_voidp(void *s){
128 stack_region_free((stack_region_t) * (void **) s);
131 static void heap_equality_free(heap_equality_t e){
137 void heap_equality_free_voidp(void *e){
138 heap_equality_free((heap_equality_t) * (void **) e);
141 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
143 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
148 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
149 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
150 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
152 void *heap1 = NULL, *heap2 = NULL;
154 if(s1->num_reg != s2->num_reg){
155 XBT_INFO("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
159 for(i=0 ; i< s1->num_reg ; i++){
161 if(s1->regions[i]->type != s2->regions[i]->type){
162 XBT_INFO("Different type of region");
166 switch(s1->regions[i]->type){
168 /* Compare heapregion */
169 if(s1->regions[i]->size != s2->regions[i]->size){
170 XBT_INFO("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
171 xbt_dynar_free(&stacks1);
172 xbt_dynar_free(&stacks2);
173 xbt_dynar_free(&equals);
178 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
179 XBT_INFO("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
180 xbt_dynar_free(&stacks1);
181 xbt_dynar_free(&stacks2);
182 xbt_dynar_free(&equals);
187 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data, &stacks1, &stacks2, &equals)){
188 XBT_INFO("Different heap (mmalloc_compare)");
189 xbt_dynar_free(&stacks1);
190 xbt_dynar_free(&stacks2);
191 xbt_dynar_free(&equals);
196 heap1 = s1->regions[i]->data;
197 heap2 = s2->regions[i]->data;
200 /* Compare data libsimgrid region */
201 if(s1->regions[i]->size != s2->regions[i]->size){
202 XBT_INFO("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
203 xbt_dynar_free(&stacks1);
204 xbt_dynar_free(&stacks2);
205 xbt_dynar_free(&equals);
210 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
211 XBT_INFO("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
212 xbt_dynar_free(&stacks1);
213 xbt_dynar_free(&stacks2);
214 xbt_dynar_free(&equals);
219 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
220 XBT_INFO("Different memcmp for data in libsimgrid");
221 xbt_dynar_free(&stacks1);
222 xbt_dynar_free(&stacks2);
223 xbt_dynar_free(&equals);
231 /* Compare data program region */
232 if(s1->regions[i]->size != s2->regions[i]->size){
233 XBT_INFO("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
234 xbt_dynar_free(&stacks1);
235 xbt_dynar_free(&stacks2);
236 xbt_dynar_free(&equals);
241 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
242 XBT_INFO("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
243 xbt_dynar_free(&stacks1);
244 xbt_dynar_free(&stacks2);
245 xbt_dynar_free(&equals);
250 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
251 XBT_INFO("Different memcmp for data in program");
252 xbt_dynar_free(&stacks1);
253 xbt_dynar_free(&stacks2);
254 xbt_dynar_free(&equals);
265 /* Stacks comparison */
266 unsigned int cursor = 0;
267 stack_region_t stack_region1, stack_region2;
269 int diff = 0, diff_local = 0;
271 while(cursor < xbt_dynar_length(stacks1)){
272 XBT_INFO("Stack %d", cursor + 1);
273 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
274 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
275 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
276 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
277 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
280 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);
282 XBT_INFO("Hamming distance between stacks : %d", diff);
283 xbt_dynar_free(&stacks1);
284 xbt_dynar_free(&stacks2);
285 xbt_dynar_free(&equals);
290 XBT_INFO("Local variables are equals in stack %d", cursor + 1);
293 XBT_INFO("Same stacks");
298 xbt_dynar_free(&stacks1);
299 xbt_dynar_free(&stacks2);
300 xbt_dynar_free(&equals);
307 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
309 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
310 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
312 xbt_dynar_t s_tokens1, s_tokens2;
313 unsigned int cursor = 0;
318 while(cursor < xbt_dynar_length(tokens1)){
319 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
320 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
321 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
322 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
323 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
324 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
325 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
326 XBT_INFO("Variable %s is different between stacks : %s - %s", xbt_dynar_get_as(s_tokens1, 0, char *), xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *));
331 xbt_dynar_free(&s_tokens1);
332 xbt_dynar_free(&s_tokens2);
336 xbt_dynar_free(&tokens1);
337 xbt_dynar_free(&tokens2);
342 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
344 unsigned int cursor = 0;
346 int end = xbt_dynar_length(equals) - 1;
347 heap_equality_t current_equality;
350 cursor = (start + end) / 2;
351 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
352 if(current_equality->address1 == a1){
353 if(current_equality->address2 == a2)
355 if(current_equality->address2 < a2)
357 if(current_equality->address2 > a2)
360 if(current_equality->address1 < a1)
362 if(current_equality->address1 > a1)
371 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
373 size_t k = 0, nb_diff = 0;
374 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
375 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
378 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
380 if(size_used1 == size_used2){
382 while(k < size_used1){
383 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
384 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
385 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
386 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
387 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
388 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))){
389 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
390 //XBT_INFO("Difference at offset %zu (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
394 //XBT_INFO("Difference at offset %zu (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
403 XBT_INFO("Different size used between stacks");