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_local_variables(xbt_strbuff_t s1, xbt_strbuff_t s2);
18 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals);
19 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2);
20 static size_t ignore(void *address);
22 static size_t ignore(void *address){
23 unsigned int cursor = 0;
25 int end = xbt_dynar_length(mc_comparison_ignore) - 1;
26 mc_ignore_region_t region;
29 cursor = (start + end) / 2;
30 region = (mc_ignore_region_t)xbt_dynar_get_as(mc_comparison_ignore, cursor, mc_ignore_region_t);
31 if(region->address == address)
33 if(region->address < address)
35 if(region->address > address)
42 static int data_program_region_compare(void *d1, void *d2, size_t size){
46 for(i=0; i<size; i++){
47 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
48 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
53 XBT_DEBUG("Hamming distance between data program regions : %d", distance);
58 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
60 size_t i = 0, ignore_size = 0;
62 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
64 for(i=0; i<size; i++){
65 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
66 if((ignore_size = ignore((char *)start_data_libsimgrid+i)) > 0){
70 pointer_align = (i / sizeof(void*)) * sizeof(void*);
71 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
72 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
73 if((addr_pointed1 > start_plt && addr_pointed1 < end_plt) || (addr_pointed2 > start_plt && addr_pointed2 < end_plt)){
76 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
77 XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
83 XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
88 static int heap_region_compare(void *d1, void *d2, size_t size){
93 for(i=0; i<size; i++){
94 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
95 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
100 XBT_DEBUG("Hamming distance between heap regions : %d (total size : %zu)", distance, size);
105 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
108 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), NULL);
109 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), NULL);
110 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), NULL);
112 void *heap1 = NULL, *heap2 = NULL;
114 if(s1->num_reg != s2->num_reg){
115 XBT_DEBUG("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
119 for(i=0 ; i< s1->num_reg ; i++){
121 if(s1->regions[i]->type != s2->regions[i]->type){
122 XBT_INFO("Different type of region");
126 switch(s1->regions[i]->type){
128 /* Compare heapregion */
129 if(s1->regions[i]->size != s2->regions[i]->size){
130 XBT_DEBUG("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
133 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
134 XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
137 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data, &stacks1, &stacks2, &equals)){
138 XBT_DEBUG("Different heap (mmalloc_compare)");
141 heap1 = s1->regions[i]->data;
142 heap2 = s2->regions[i]->data;
145 /* Compare data libsimgrid region */
146 if(s1->regions[i]->size != s2->regions[i]->size){
147 XBT_DEBUG("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
150 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
151 XBT_DEBUG("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
154 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
155 XBT_DEBUG("Different memcmp for data in libsimgrid");
161 /* Compare data program region */
162 if(s1->regions[i]->size != s2->regions[i]->size){
163 XBT_DEBUG("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
166 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
167 XBT_DEBUG("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
170 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
171 XBT_DEBUG("Different memcmp for data in program");
180 /* Stacks comparison */
181 unsigned int cursor = 1;
182 stack_region_t stack_region1, stack_region2;
186 while(cursor < xbt_dynar_length(stacks1)){
187 XBT_DEBUG("Stack %d", cursor + 1);
188 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
189 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
190 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
191 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
192 diff += compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
196 XBT_DEBUG("Hamming distance between stacks : %d", diff);
204 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
206 unsigned int cursor = 0;
208 int end = xbt_dynar_length(equals) - 1;
209 heap_equality_t current_equality;
212 cursor = (start + end) / 2;
213 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
214 if(current_equality->address1 == a1){
215 if(current_equality->address2 == a2)
217 if(current_equality->address2 < a2)
219 if(current_equality->address2 > a2)
222 if(current_equality->address1 < a1)
224 if(current_equality->address1 > a1)
233 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
235 int k = 0, nb_diff = 0;
236 long size_used1 = (long)s1->size - (long)((char*)sp1 - (char*)s1->address);
237 long size_used2 = (long)s2->size - (long)((char*)sp2 - (char*)s2->address);
240 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
242 if(size_used1 == size_used2){
244 while(k < size_used1){
245 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
246 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
247 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
248 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
249 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
250 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))){
251 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
252 XBT_DEBUG("Difference at offset %d (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
256 XBT_DEBUG("Difference at offset %d (%p - %p)", k, (char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k);
265 XBT_DEBUG("Different size used between stacks");
272 static int compare_local_variables(xbt_strbuff_t s1, xbt_strbuff_t s2){
274 if(strcmp(s1->data, s2->data) != 0){
275 XBT_DEBUG("%s", s1->data);
276 XBT_DEBUG("%s", s2->data);