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. */
7 #include "mc_private.h"
8 #include "xbt/module.h"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
11 "Logging specific to mc_checkpoint");
13 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
14 static void MC_region_restore(mc_mem_region_t reg);
15 static void MC_region_destroy(mc_mem_region_t reg);
17 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
19 static int data_program_region_compare(void *d1, void *d2, size_t size);
20 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size);
22 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
24 mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
26 new_reg->start_addr = start_addr;
28 new_reg->data = xbt_malloc0(size);
29 memcpy(new_reg->data, start_addr, size);
31 XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
36 static void MC_region_restore(mc_mem_region_t reg)
38 /*FIXME: check if start_addr is still mapped, if it is not, then map it
39 before copying the data */
41 memcpy(reg->start_addr, reg->data, reg->size);
46 static void MC_region_destroy(mc_mem_region_t reg)
52 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
54 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
55 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
56 snapshot->regions[snapshot->num_reg] = new_reg;
61 void MC_take_snapshot(mc_snapshot_t snapshot)
65 memory_map_t maps = get_memory_map();
67 /* Save the std heap and the writable mapped pages of libsimgrid */
68 while (i < maps->mapsize) {
69 reg = maps->regions[i];
70 if ((reg.prot & PROT_WRITE)){
71 if (maps->regions[i].pathname == NULL){
72 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
73 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
76 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
77 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
84 free_memory_map(maps);
87 void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
91 memory_map_t maps = get_memory_map();
94 /* Save the std heap and the writable mapped pages of libsimgrid */
95 while (i < maps->mapsize && nb_reg < 3) {
96 reg = maps->regions[i];
97 if ((reg.prot & PROT_WRITE)){
98 if (maps->regions[i].pathname == NULL){
99 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
100 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
104 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
105 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
108 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
109 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
118 free_memory_map(maps);
122 void MC_restore_snapshot(mc_snapshot_t snapshot)
125 for(i=0; i < snapshot->num_reg; i++){
126 MC_region_restore(snapshot->regions[i]);
131 void MC_free_snapshot(mc_snapshot_t snapshot)
134 for(i=0; i < snapshot->num_reg; i++)
135 MC_region_destroy(snapshot->regions[i]);
140 static int data_program_region_compare(void *d1, void *d2, size_t size){
144 for(i=0; i<size; i++){
145 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
146 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
151 XBT_DEBUG("Hamming distance between data program regions : %d", distance);
156 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
160 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
162 for(i=0; i<size; i++){
163 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
164 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
165 pointer_align = (i / sizeof(void*)) * sizeof(void*);
166 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
167 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
168 XBT_DEBUG("Addresses pointed : %p - %p", addr_pointed1, addr_pointed2);
173 XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
178 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
182 if(s1->num_reg != s2->num_reg){
183 XBT_DEBUG("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
187 for(i=0 ; i< s1->num_reg ; i++){
189 if(s1->regions[i]->type != s2->regions[i]->type){
190 XBT_INFO("Different type of region");
194 switch(s1->regions[i]->type){
196 /* Compare heapregion */
197 if(s1->regions[i]->size != s2->regions[i]->size){
198 XBT_DEBUG("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
201 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
202 XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
205 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data)){
206 XBT_DEBUG("Different heap (mmalloc_compare)");
211 /* Compare data libsimgrid region */
212 if(s1->regions[i]->size != s2->regions[i]->size){
213 XBT_DEBUG("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
216 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
217 XBT_DEBUG("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
220 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
221 XBT_DEBUG("Different memcmp for data in libsimgrid");
227 /* Compare data program region */
228 if(s1->regions[i]->size != s2->regions[i]->size){
229 XBT_DEBUG("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
233 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
234 XBT_DEBUG("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
238 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
239 XBT_DEBUG("Different memcmp for data in program");