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 heap_ignore_size(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 is_stack_ignore_variable(char *frame, char *var_name);
25 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals);
27 static size_t heap_ignore_size(void *address){
28 unsigned int cursor = 0;
30 int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
31 mc_heap_ignore_region_t region;
34 cursor = (start + end) / 2;
35 region = (mc_heap_ignore_region_t)xbt_dynar_get_as(mc_heap_comparison_ignore, cursor, mc_heap_ignore_region_t);
36 if(region->address == address)
38 if(region->address < address)
40 if(region->address > address)
47 static int data_program_region_compare(void *d1, void *d2, size_t size){
51 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
53 for(i=0; i<size; i++){
54 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
55 pointer_align = (i / sizeof(void*)) * sizeof(void*);
56 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
57 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
58 if((addr_pointed1 > start_plt_binary && addr_pointed1 < end_plt_binary) || (addr_pointed2 > start_plt_binary && addr_pointed2 < end_plt_binary)){
61 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
67 XBT_INFO("Hamming distance between data program regions : %d", distance);
72 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
74 size_t i = 0, ignore_size = 0;
76 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
78 for(i=0; i<size; i++){
79 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
80 if((ignore_size = heap_ignore_size((char *)start_data_libsimgrid+i)) > 0){
84 pointer_align = (i / sizeof(void*)) * sizeof(void*);
85 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
86 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
87 if((addr_pointed1 > start_plt_libsimgrid && addr_pointed1 < end_plt_libsimgrid) || (addr_pointed2 > start_plt_libsimgrid && addr_pointed2 < end_plt_libsimgrid)){
89 }else if(addr_pointed1 >= raw_heap && addr_pointed1 <= end_raw_heap && addr_pointed2 >= raw_heap && addr_pointed2 <= end_raw_heap){
92 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
93 XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
99 XBT_INFO("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
104 static int heap_region_compare(void *d1, void *d2, size_t size){
109 for(i=0; i<size; i++){
110 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
111 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
116 XBT_INFO("Hamming distance between heap regions : %d (total size : %zu)", distance, size);
121 static void stack_region_free(stack_region_t s){
123 xbt_free(s->process_name);
128 void stack_region_free_voidp(void *s){
129 stack_region_free((stack_region_t) * (void **) s);
132 static void heap_equality_free(heap_equality_t e){
138 void heap_equality_free_voidp(void *e){
139 heap_equality_free((heap_equality_t) * (void **) e);
142 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
144 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
149 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
150 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
151 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
153 void *heap1 = NULL, *heap2 = NULL;
155 if(s1->num_reg != s2->num_reg){
156 XBT_DEBUG("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
160 for(i=0 ; i< s1->num_reg ; i++){
162 if(s1->regions[i]->type != s2->regions[i]->type){
163 XBT_DEBUG("Different type of region");
167 switch(s1->regions[i]->type){
169 /* Compare heapregion */
170 if(s1->regions[i]->size != s2->regions[i]->size){
171 XBT_DEBUG("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
172 xbt_dynar_free(&stacks1);
173 xbt_dynar_free(&stacks2);
174 xbt_dynar_free(&equals);
179 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
180 XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
181 xbt_dynar_free(&stacks1);
182 xbt_dynar_free(&stacks2);
183 xbt_dynar_free(&equals);
188 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data, &stacks1, &stacks2, &equals)){
189 XBT_INFO("Different heap (mmalloc_compare)");
190 xbt_dynar_free(&stacks1);
191 xbt_dynar_free(&stacks2);
192 xbt_dynar_free(&equals);
197 heap1 = s1->regions[i]->data;
198 heap2 = s2->regions[i]->data;
201 /* Compare data libsimgrid region */
202 if(s1->regions[i]->size != s2->regions[i]->size){
203 XBT_DEBUG("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
204 xbt_dynar_free(&stacks1);
205 xbt_dynar_free(&stacks2);
206 xbt_dynar_free(&equals);
211 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
212 XBT_DEBUG("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
213 xbt_dynar_free(&stacks1);
214 xbt_dynar_free(&stacks2);
215 xbt_dynar_free(&equals);
220 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
221 XBT_INFO("Different memcmp for data in libsimgrid");
222 xbt_dynar_free(&stacks1);
223 xbt_dynar_free(&stacks2);
224 xbt_dynar_free(&equals);
232 /* Compare data program region */
233 if(s1->regions[i]->size != s2->regions[i]->size){
234 XBT_DEBUG("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
235 xbt_dynar_free(&stacks1);
236 xbt_dynar_free(&stacks2);
237 xbt_dynar_free(&equals);
242 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
243 XBT_DEBUG("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
244 xbt_dynar_free(&stacks1);
245 xbt_dynar_free(&stacks2);
246 xbt_dynar_free(&equals);
251 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
252 XBT_INFO("Different memcmp for data in program");
253 xbt_dynar_free(&stacks1);
254 xbt_dynar_free(&stacks2);
255 xbt_dynar_free(&equals);
266 /* Stacks comparison */
267 unsigned int cursor = 0;
268 stack_region_t stack_region1, stack_region2;
270 int diff = 0, diff_local = 0;
272 while(cursor < xbt_dynar_length(stacks1)){
273 XBT_DEBUG("Stack %d", cursor + 1);
274 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
275 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
276 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
277 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
278 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
281 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);
283 XBT_INFO("Different local variables between stacks");
284 xbt_dynar_free(&stacks1);
285 xbt_dynar_free(&stacks2);
286 xbt_dynar_free(&equals);
291 XBT_INFO("Local variables are equals in stack %d", cursor + 1);
294 XBT_INFO("Hamming distance between stacks %d : %d", cursor + 1, diff);
299 xbt_dynar_free(&stacks1);
300 xbt_dynar_free(&stacks2);
301 xbt_dynar_free(&equals);
308 static int is_stack_ignore_variable(char *frame, char *var_name){
310 unsigned int cursor = 0;
312 int end = xbt_dynar_length(mc_stack_comparison_ignore) - 1;
313 mc_stack_ignore_variable_t current_var;
316 cursor = (start + end) / 2;
317 current_var = (mc_stack_ignore_variable_t)xbt_dynar_get_as(mc_stack_comparison_ignore, cursor, mc_stack_ignore_variable_t);
318 if(strcmp(current_var->frame, frame) == 0){
319 if(strcmp(current_var->var_name, var_name) == 0)
321 if(strcmp(current_var->var_name, var_name) < 0)
323 if(strcmp(current_var->var_name, var_name) > 0)
326 if(strcmp(current_var->frame, frame) < 0)
328 if(strcmp(current_var->frame, frame) > 0)
335 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
337 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
338 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
340 xbt_dynar_t s_tokens1, s_tokens2;
341 unsigned int cursor = 0;
347 while(cursor < xbt_dynar_length(tokens1)){
348 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
349 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
350 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
351 if((strcmp(xbt_dynar_get_as(s_tokens1, 0, char *), "ip") == 0) && (strcmp(xbt_dynar_get_as(s_tokens2, 0, char *), "ip") == 0)){
352 ip1 = strdup(xbt_dynar_get_as(s_tokens1, 1, char *));
353 ip2 = strdup(xbt_dynar_get_as(s_tokens2, 1, char *));
354 XBT_DEBUG("Ip1 : %s, Ip2 : %s", ip1, ip2);
356 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
357 /* Ignore this variable ? */
358 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 *))){
359 xbt_dynar_free(&s_tokens1);
360 xbt_dynar_free(&s_tokens2);
364 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
365 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
366 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
367 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug))
368 XBT_DEBUG("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 *));
370 XBT_INFO("Variable %s is different between stacks", xbt_dynar_get_as(s_tokens1, 0, char *));
375 xbt_dynar_free(&s_tokens1);
376 xbt_dynar_free(&s_tokens2);
380 xbt_dynar_free(&tokens1);
381 xbt_dynar_free(&tokens2);
386 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
388 unsigned int cursor = 0;
390 int end = xbt_dynar_length(equals) - 1;
391 heap_equality_t current_equality;
394 cursor = (start + end) / 2;
395 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
396 if(current_equality->address1 == a1){
397 if(current_equality->address2 == a2)
399 if(current_equality->address2 < a2)
401 if(current_equality->address2 > a2)
404 if(current_equality->address1 < a1)
406 if(current_equality->address1 > a1)
415 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
417 size_t k = 0, nb_diff = 0;
418 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
419 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
422 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
424 if(size_used1 == size_used2){
426 while(k < size_used1){
427 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
428 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
429 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
430 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
431 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
432 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))){
433 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
434 //XBT_INFO("Difference at offset %zu (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
438 //XBT_INFO("Difference at offset %zu (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
447 XBT_INFO("Different size used between stacks");
454 int MC_compare_snapshots(void *s1, void *s2){
456 return simcall_mc_compare_snapshots(s1, s2);