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, size %zu", new_reg->data, start_addr, size);
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 : %zu", 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 data (%zu)", size);
78 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
79 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
80 snapshot->regions[snapshot->num_reg] = new_reg;
85 void MC_take_snapshot(mc_snapshot_t snapshot)
89 memory_map_t maps = get_memory_map();
91 /* Save the std heap and the writable mapped pages of libsimgrid */
92 while (i < maps->mapsize) {
93 reg = maps->regions[i];
94 if ((reg.prot & PROT_WRITE)){
95 if (maps->regions[i].pathname == NULL){
96 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
97 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
100 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
101 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
108 /* FIXME: free the memory map */
112 void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
116 memory_map_t maps = get_memory_map();
118 for(i=0; i< snapshot->num_reg; i++){
119 MC_region_destroy(snapshot->regions[i]);
122 snapshot->num_reg = 0;
126 /* Save the std heap and the writable mapped pages of libsimgrid */
127 while (i < maps->mapsize) {
128 reg = maps->regions[i];
129 if ((reg.prot & PROT_WRITE)){
130 if (maps->regions[i].pathname == NULL){
131 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
132 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
135 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
136 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
143 /* FIXME: free the memory map */
146 void MC_take_snapshot_to_restore_liveness(mc_snapshot_t snapshot)
150 memory_map_t maps = get_memory_map();
152 for(i=0; i< snapshot->num_reg; i++){
153 MC_region_destroy(snapshot->regions[i]);
156 snapshot->num_reg = 0;
160 /* Save the std heap and the writable mapped pages of libsimgrid */
161 while (i < maps->mapsize) {
162 reg = maps->regions[i];
163 if ((reg.prot & PROT_WRITE)){
164 if (maps->regions[i].pathname == NULL){
165 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
166 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
169 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
170 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
172 if (!memcmp(basename(maps->regions[i].pathname), basename(prog_name), strlen(basename(prog_name)))){
173 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
181 /* FIXME: free the memory map */
184 void MC_restore_snapshot(mc_snapshot_t snapshot)
187 for(i=0; i < snapshot->num_reg; i++){
188 MC_region_restore(snapshot->regions[i]);
189 switch(snapshot->regions[i]->type){
191 XBT_DEBUG("heap restored");
194 XBT_DEBUG("libsimgrid (data) restored");
197 XBT_DEBUG("data program restored");
205 void MC_free_snapshot(mc_snapshot_t snapshot)
208 for(i=0; i < snapshot->num_reg; i++)
209 MC_region_destroy(snapshot->regions[i]);