5 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
6 "Logging specific to mc_checkpoint");
8 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
9 static void MC_region_restore(mc_mem_region_t reg);
10 static void MC_region_destroy(mc_mem_region_t reg);
12 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
14 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
16 mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
18 new_reg->start_addr = start_addr;
20 new_reg->data = xbt_malloc0(size);
21 XBT_DEBUG("New reg data %p, start_addr %p", new_reg->data, start_addr);
22 memcpy(new_reg->data, start_addr, size);
27 static void MC_region_restore(mc_mem_region_t reg)
29 /*FIXME: check if start_addr is still mapped, if it is not, then map it
30 before copying the data */
32 memory_map_t maps = get_memory_map();
36 while(i < maps->mapsize){
38 if (maps->regions[i].pathname != NULL){
39 if (!memcmp(maps->regions[i].pathname, "[stack]", 7)){
40 size_t diff = (char*)reg->start_addr - (char*)r.start_addr;
41 void *segment = malloc(reg->size + diff);
42 XBT_DEBUG("Size of segment : %lu", sizeof(segment));
43 memcpy((char *)segment + diff, reg->data, reg->size);
44 memcpy(r.start_addr, segment, sizeof(segment));
45 XBT_DEBUG("Memcpy region ok");
52 XBT_DEBUG("Memcpy : dest %p, src %p, size %zu", reg->start_addr, reg->data, reg->size);
53 memcpy(reg->start_addr, reg->data, reg->size);
59 static void MC_region_destroy(mc_mem_region_t reg)
65 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
69 XBT_DEBUG("New region heap (%zu)", size);
72 XBT_DEBUG("New region libsimgrid (%zu)", size);
75 XBT_DEBUG("New region program (%zu)", size);
78 XBT_DEBUG("New region stack (%zu)", size);
81 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
82 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
83 snapshot->regions[snapshot->num_reg] = new_reg;
88 void MC_take_snapshot(mc_snapshot_t snapshot)
92 memory_map_t maps = get_memory_map();
94 /* Save the std heap and the writable mapped pages of libsimgrid */
95 while (i < maps->mapsize) {
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);
103 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
104 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
111 /* FIXME: free the memory map */
115 void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
119 memory_map_t maps = get_memory_map();
121 for(i=0; i< snapshot->num_reg; i++){
122 MC_region_destroy(snapshot->regions[i]);
125 snapshot->num_reg = 0;
129 /* Save the std heap and the writable mapped pages of libsimgrid */
130 while (i < maps->mapsize) {
131 reg = maps->regions[i];
132 if ((reg.prot & PROT_WRITE)){
133 if (maps->regions[i].pathname == NULL){
134 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
135 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
138 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
139 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
141 if (!memcmp(basename(maps->regions[i].pathname), basename(prog_name), strlen(basename(prog_name)))){
142 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
144 if (!memcmp(maps->regions[i].pathname, "[stack]", 7)){
145 MC_snapshot_add_region(snapshot, 3, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
154 /* FIXME: free the memory map */
157 void MC_take_snapshot_to_restore_liveness(mc_snapshot_t snapshot)
161 memory_map_t maps = get_memory_map();
163 for(i=0; i< snapshot->num_reg; i++){
164 MC_region_destroy(snapshot->regions[i]);
167 snapshot->num_reg = 0;
171 /* Save the std heap and the writable mapped pages of libsimgrid */
172 while (i < maps->mapsize) {
173 reg = maps->regions[i];
174 if ((reg.prot & PROT_WRITE)){
175 if (maps->regions[i].pathname == NULL){
176 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
177 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
180 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
181 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
183 if (!memcmp(basename(maps->regions[i].pathname), basename(prog_name), strlen(basename(prog_name)))){
184 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
192 /* FIXME: free the memory map */
195 void MC_restore_snapshot(mc_snapshot_t snapshot)
198 for(i=0; i < snapshot->num_reg; i++){
199 MC_region_restore(snapshot->regions[i]);
200 switch(snapshot->regions[i]->type){
202 XBT_DEBUG("heap restored");
205 XBT_DEBUG("libsimgrid (data) restored");
208 XBT_DEBUG("program (data) restored");
211 XBT_DEBUG("stack restored");
219 void MC_free_snapshot(mc_snapshot_t snapshot)
222 for(i=0; i < snapshot->num_reg; i++)
223 MC_region_destroy(snapshot->regions[i]);