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 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
62 XBT_VERB("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
63 XBT_VERB("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
73 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
75 size_t i = 0, ignore_size = 0;
77 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
79 for(i=0; i<size; i++){
80 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
81 if((ignore_size = heap_ignore_size((char *)start_data_libsimgrid+i)) > 0){
84 }else if((ignore_size = heap_ignore_size((char *)start_bss_libsimgrid+i)) > 0){
88 pointer_align = (i / sizeof(void*)) * sizeof(void*);
89 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
90 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
91 if((addr_pointed1 > start_plt_libsimgrid && addr_pointed1 < end_plt_libsimgrid) || (addr_pointed2 > start_plt_libsimgrid && addr_pointed2 < end_plt_libsimgrid)){
93 }else if(addr_pointed1 >= raw_heap && addr_pointed1 <= end_raw_heap && addr_pointed2 >= raw_heap && addr_pointed2 <= end_raw_heap){
96 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
97 XBT_VERB("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
98 XBT_VERB("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
108 static int heap_region_compare(void *d1, void *d2, size_t size){
112 for(i=0; i<size; i++){
113 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
114 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
115 XBT_VERB("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
124 static void stack_region_free(stack_region_t s){
126 xbt_free(s->process_name);
131 void stack_region_free_voidp(void *s){
132 stack_region_free((stack_region_t) * (void **) s);
135 static void heap_equality_free(heap_equality_t e){
141 void heap_equality_free_voidp(void *e){
142 heap_equality_free((heap_equality_t) * (void **) e);
145 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
147 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
151 int errors = 0, i = 0;
153 if(s1->num_reg != s2->num_reg){
154 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose)){
155 XBT_VERB("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
160 int heap_index = 0, data_libsimgrid_index = 0, data_program_index = 0;
162 /* Get index of regions */
163 while(i < s1->num_reg){
164 switch(s1->regions[i]->type){
170 data_libsimgrid_index = i;
172 while( i < s1->num_reg && s1->regions[i]->type == 1)
176 data_program_index = i;
182 /* Compare number of blocks/fragments used in each heap */
183 size_t chunks_used1 = mmalloc_get_chunks_used((xbt_mheap_t)s1->regions[heap_index]->data);
184 size_t chunks_used2 = mmalloc_get_chunks_used((xbt_mheap_t)s2->regions[heap_index]->data);
185 if(chunks_used1 != chunks_used2){
186 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
187 XBT_DEBUG("Different number of chunks used in each heap : %zu - %zu", chunks_used1, chunks_used2);
190 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
191 XBT_VERB("Different number of chunks used in each heap : %zu - %zu", chunks_used1, chunks_used2);
198 /* Compare size of stacks */
199 unsigned int cursor = 0;
200 void *addr_stack1, *addr_stack2;
202 size_t size_used1, size_used2;
203 while(cursor < xbt_dynar_length(stacks_areas)){
204 addr_stack1 = (char *)s1->regions[heap_index]->data + ((char *)((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->address - (char *)std_heap);
205 addr_stack2 = (char *)s2->regions[heap_index]->data + ((char *)((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->address - (char *)std_heap);
206 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
207 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
208 size_used1 = ((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->size - ((char*)sp1 - (char*)addr_stack1);
209 size_used2 = ((stack_region_t)xbt_dynar_get_as(stacks_areas, cursor, stack_region_t))->size - ((char*)sp2 - (char*)addr_stack2);
210 if(size_used1 != size_used2){
211 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
212 XBT_DEBUG("Different size used in stacks : %zu - %zu", size_used1, size_used2);
215 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
216 XBT_VERB("Different size used in stacks : %zu - %zu", size_used1, size_used2);
225 /* Compare program data segment(s) */
226 i = data_program_index;
227 while(i < s1->num_reg && s1->regions[i]->type == 2){
228 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
229 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
230 XBT_DEBUG("Different memcmp for data in program");
233 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
234 XBT_VERB("Different memcmp for data in program");
243 /* Compare libsimgrid data segment(s) */
244 i = data_libsimgrid_index;
245 while(i < s1->num_reg && s1->regions[i]->type == 1){
246 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
247 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
248 XBT_DEBUG("Different memcmp for data in libsimgrid");
251 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
252 XBT_VERB("Different memcmp for data in libsimgrid");
262 xbt_dynar_t stacks1 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
263 xbt_dynar_t stacks2 = xbt_dynar_new(sizeof(stack_region_t), stack_region_free_voidp);
264 xbt_dynar_t equals = xbt_dynar_new(sizeof(heap_equality_t), heap_equality_free_voidp);
266 void *heap1 = s1->regions[heap_index]->data, *heap2 = s2->regions[heap_index]->data;
268 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[heap_index]->data, (xbt_mheap_t)s2->regions[heap_index]->data, &stacks1, &stacks2, &equals)){
270 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
271 XBT_DEBUG("Different heap (mmalloc_compare)");
275 xbt_dynar_free(&stacks1);
276 xbt_dynar_free(&stacks2);
277 xbt_dynar_free(&equals);
279 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
280 XBT_VERB("Different heap (mmalloc_compare)");
287 /* Stacks comparison */
289 stack_region_t stack_region1, stack_region2;
290 int diff = 0, diff_local = 0;
292 while(cursor < xbt_dynar_length(stacks1)){
293 stack_region1 = (stack_region_t)(xbt_dynar_get_as(stacks1, cursor, stack_region_t));
294 stack_region2 = (stack_region_t)(xbt_dynar_get_as(stacks2, cursor, stack_region_t));
295 sp1 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s1->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
296 sp2 = ((mc_snapshot_stack_t)xbt_dynar_get_as(s2->stacks, cursor, mc_snapshot_stack_t))->stack_pointer;
297 diff = compare_stack(stack_region1, stack_region2, sp1, sp2, heap1, heap2, equals);
299 if(diff > 0){ /* Differences may be due to padding */
300 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);
302 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_debug)){
303 XBT_DEBUG("Different local variables between stacks %d", cursor + 1);
306 xbt_dynar_free(&stacks1);
307 xbt_dynar_free(&stacks2);
308 xbt_dynar_free(&equals);
310 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
311 XBT_VERB("Different local variables between stacks %d", cursor + 1);
323 xbt_dynar_free(&stacks1);
324 xbt_dynar_free(&stacks2);
325 xbt_dynar_free(&equals);
333 static int is_stack_ignore_variable(char *frame, char *var_name){
335 unsigned int cursor = 0;
337 int end = xbt_dynar_length(mc_stack_comparison_ignore) - 1;
338 mc_stack_ignore_variable_t current_var;
341 cursor = (start + end) / 2;
342 current_var = (mc_stack_ignore_variable_t)xbt_dynar_get_as(mc_stack_comparison_ignore, cursor, mc_stack_ignore_variable_t);
343 if(strcmp(current_var->frame, frame) == 0){
344 if(strcmp(current_var->var_name, var_name) == 0)
346 if(strcmp(current_var->var_name, var_name) < 0)
348 if(strcmp(current_var->var_name, var_name) > 0)
351 if(strcmp(current_var->frame, frame) < 0)
353 if(strcmp(current_var->frame, frame) > 0)
360 static int compare_local_variables(char *s1, char *s2, xbt_dynar_t heap_equals){
362 xbt_dynar_t tokens1 = xbt_str_split(s1, NULL);
363 xbt_dynar_t tokens2 = xbt_str_split(s2, NULL);
365 xbt_dynar_t s_tokens1, s_tokens2;
366 unsigned int cursor = 0;
368 char *ip1 = NULL, *ip2 = NULL;
370 while(cursor < xbt_dynar_length(tokens1)){
371 s_tokens1 = xbt_str_split(xbt_dynar_get_as(tokens1, cursor, char *), "=");
372 s_tokens2 = xbt_str_split(xbt_dynar_get_as(tokens2, cursor, char *), "=");
373 if(xbt_dynar_length(s_tokens1) > 1 && xbt_dynar_length(s_tokens2) > 1){
374 if((strcmp(xbt_dynar_get_as(s_tokens1, 0, char *), "ip") == 0) && (strcmp(xbt_dynar_get_as(s_tokens2, 0, char *), "ip") == 0)){
375 ip1 = strdup(xbt_dynar_get_as(s_tokens1, 1, char *));
376 ip2 = strdup(xbt_dynar_get_as(s_tokens2, 1, char *));
377 /*if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
378 XBT_VERB("Instruction pointer : %s, Instruction pointer : %s", ip1, ip2);*/
380 if(strcmp(xbt_dynar_get_as(s_tokens1, 1, char *), xbt_dynar_get_as(s_tokens2, 1, char *)) != 0){
381 /* Ignore this variable ? */
382 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 *))){
383 xbt_dynar_free(&s_tokens1);
384 xbt_dynar_free(&s_tokens2);
388 addr1 = (void *) strtoul(xbt_dynar_get_as(s_tokens1, 1, char *), NULL, 16);
389 addr2 = (void *) strtoul(xbt_dynar_get_as(s_tokens2, 1, char *), NULL, 16);
390 if(is_heap_equality(heap_equals, addr1, addr2) == 0){
391 if(XBT_LOG_ISENABLED(mc_compare, xbt_log_priority_verbose))
392 XBT_VERB("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 *));
393 xbt_dynar_free(&s_tokens1);
394 xbt_dynar_free(&s_tokens2);
399 xbt_dynar_free(&s_tokens1);
400 xbt_dynar_free(&s_tokens2);
404 xbt_dynar_free(&tokens1);
405 xbt_dynar_free(&tokens2);
410 static int is_heap_equality(xbt_dynar_t equals, void *a1, void *a2){
412 unsigned int cursor = 0;
414 int end = xbt_dynar_length(equals) - 1;
415 heap_equality_t current_equality;
418 cursor = (start + end) / 2;
419 current_equality = (heap_equality_t)xbt_dynar_get_as(equals, cursor, heap_equality_t);
420 if(current_equality->address1 == a1){
421 if(current_equality->address2 == a2)
423 if(current_equality->address2 < a2)
425 if(current_equality->address2 > a2)
428 if(current_equality->address1 < a1)
430 if(current_equality->address1 > a1)
439 static int compare_stack(stack_region_t s1, stack_region_t s2, void *sp1, void *sp2, void *heap1, void *heap2, xbt_dynar_t equals){
442 size_t size_used1 = s1->size - ((char*)sp1 - (char*)s1->address);
443 size_t size_used2 = s2->size - ((char*)sp2 - (char*)s2->address);
446 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
448 while(k < size_used1){
449 if(memcmp((char *)s1->address + s1->size - k, (char *)s2->address + s2->size - k, 1) != 0){
450 pointer_align = ((size_used1 - k) / sizeof(void*)) * sizeof(void*);
451 addr_pointed1 = *((void **)(((char*)s1->address + (s1->size - size_used1)) + pointer_align));
452 addr_pointed2 = *((void **)(((char*)s2->address + (s2->size - size_used2)) + pointer_align));
453 if(is_heap_equality(equals, addr_pointed1, addr_pointed2) == 0){
454 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))){
455 if(is_free_area(addr_pointed1, (xbt_mheap_t)heap1) == 0 || is_free_area(addr_pointed2, (xbt_mheap_t)heap2) == 0){
469 int MC_compare_snapshots(void *s1, void *s2){
471 return simcall_mc_compare_snapshots(s1, s2);