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 int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals);
23 static size_t ignore(void *address){
24 unsigned int cursor = 0;
26 int end = xbt_dynar_length(mc_comparison_ignore) - 1;
27 mc_ignore_region_t region;
30 cursor = (start + end) / 2;
31 region = (mc_ignore_region_t)xbt_dynar_get_as(mc_comparison_ignore, cursor, mc_ignore_region_t);
32 if(region->address == address)
34 if(region->address < address)
36 if(region->address > address)
43 static int data_program_region_compare(void *d1, void *d2, size_t size){
47 for(i=0; i<size; i++){
48 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
49 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
54 XBT_DEBUG("Hamming distance between data program regions : %d", distance);
59 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
61 size_t i = 0, ignore_size = 0;
63 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
65 for(i=0; i<size; i++){
66 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
67 if((ignore_size = ignore((char *)start_data_libsimgrid+i)) > 0){
71 pointer_align = (i / sizeof(void*)) * sizeof(void*);
72 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
73 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
74 if((addr_pointed1 > start_plt && addr_pointed1 < end_plt) || (addr_pointed2 > start_plt && addr_pointed2 < end_plt)){
77 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
78 XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
84 XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
89 static int heap_region_compare(void *d1, void *d2, size_t size){
94 for(i=0; i<size; i++){
95 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
96 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
101 XBT_DEBUG("Hamming distance between heap regions : %d (total size : %zu)", distance, size);
106 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
109 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), NULL);
110 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), NULL);
111 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), NULL);
113 void *heap1 = NULL, *heap2 = NULL;
115 if(s1->num_reg != s2->num_reg){
116 XBT_INFO("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
120 for(i=0 ; i< s1->num_reg ; i++){
122 if(s1->regions[i]->type != s2->regions[i]->type){
123 XBT_INFO("Different type of region");
127 switch(s1->regions[i]->type){
129 /* Compare heapregion */
130 if(s1->regions[i]->size != s2->regions[i]->size){
131 XBT_INFO("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
134 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
135 XBT_INFO("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
138 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data, &stacks1, &stacks2, &equals)){
139 XBT_INFO("Different heap (mmalloc_compare)");
142 heap1 = s1->regions[i]->data;
143 heap2 = s2->regions[i]->data;
146 /* Compare data libsimgrid region */
147 if(s1->regions[i]->size != s2->regions[i]->size){
148 XBT_INFO("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
151 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
152 XBT_INFO("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
155 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
156 XBT_INFO("Different memcmp for data in libsimgrid");
162 /* Compare data program region */
163 if(s1->regions[i]->size != s2->regions[i]->size){
164 XBT_INFO("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
167 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
168 XBT_INFO("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
171 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
172 XBT_INFO("Different memcmp for data in program");
181 /* Stacks comparison */
182 unsigned int cursor = 1, cursor2 = 0;
183 stack_region_t stack_region1, stack_region2;
185 int diff = 0, diff_local = 0;
186 heap_equality_t equality;
188 while(cursor < xbt_dynar_length(stacks1)){
189 XBT_INFO("Stack %d", cursor + 1);
190 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
191 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
192 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
193 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
194 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
197 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);
199 XBT_INFO("Hamming distance between stacks : %d", diff);
202 XBT_INFO("Local variables are equals in stack %d", cursor + 1);
205 XBT_INFO("Same stacks");
214 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
216 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
217 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
219 xbt_dynar_t s_tokens1, s_tokens2;
220 unsigned int cursor = 0;
225 while(cursor < xbt_dynar_length(tokens1)){
226 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
227 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
228 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
229 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
230 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
231 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
232 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
233 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 *));
245 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
247 unsigned int cursor = 0;
249 int end = xbt_dynar_length(equals) - 1;
250 heap_equality_t current_equality;
253 cursor = (start + end) / 2;
254 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
255 if(current_equality->address1 == a1){
256 if(current_equality->address2 == a2)
258 if(current_equality->address2 < a2)
260 if(current_equality->address2 > a2)
263 if(current_equality->address1 < a1)
265 if(current_equality->address1 > a1)
274 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
276 size_t k = 0, nb_diff = 0;
277 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
278 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
281 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
283 if(size_used1 == size_used2){
285 while(k < size_used1){
286 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
287 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
288 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
289 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
290 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
291 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))){
292 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
293 //XBT_INFO("Difference at offset %zu (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
297 //XBT_INFO("Difference at offset %zu (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
306 XBT_INFO("Different size used between stacks");