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 //memset(segment, '\0', diff);
45 //XBT_DEBUG("Memset ok");
46 //memcpy(segment+diff, reg->data, reg->size);
47 //XBT_DEBUG("Memcpy segment ok");
48 memcpy(r.start_addr, segment, sizeof(segment));
49 XBT_DEBUG("Memcpy region ok");
50 //memcpy(r.start_addr, reg->data, sizeof(reg->data));
57 XBT_DEBUG("Memcpy : dest %p, src %p, size %Zu", reg->start_addr, reg->data, reg->size);
58 memcpy(reg->start_addr, reg->data, reg->size);
64 static void MC_region_destroy(mc_mem_region_t reg)
70 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
74 XBT_DEBUG("New region heap");
77 XBT_DEBUG("New region libsimgrid");
80 XBT_DEBUG("New region program");
83 XBT_DEBUG("New region stack");
86 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
87 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
88 snapshot->regions[snapshot->num_reg] = new_reg;
93 void MC_take_snapshot(mc_snapshot_t snapshot)
97 memory_map_t maps = get_memory_map();
99 /* Save the std heap and the writable mapped pages of libsimgrid */
100 while (i < maps->mapsize) {
101 reg = maps->regions[i];
102 if ((reg.prot & PROT_WRITE)){
103 if (maps->regions[i].pathname == NULL){
104 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
105 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
108 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
109 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
116 /* FIXME: free the memory map */
120 void MC_take_snapshot_liveness(mc_snapshot_t snapshot, char *prgm)
124 memory_map_t maps = get_memory_map();
126 for(i=0; i< snapshot->num_reg; i++){
127 MC_region_destroy(snapshot->regions[i]);
130 snapshot->num_reg = 0;
134 /* Save the std heap and the writable mapped pages of libsimgrid */
135 while (i < maps->mapsize) {
136 reg = maps->regions[i];
137 if ((reg.prot & PROT_WRITE)){
138 if (maps->regions[i].pathname == NULL){
139 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
140 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
143 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
144 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
146 if (!memcmp(basename(maps->regions[i].pathname), basename(prgm), strlen(basename(prgm)))){
147 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
149 if (!memcmp(maps->regions[i].pathname, "[stack]", 7)){
150 MC_snapshot_add_region(snapshot, 3, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
159 /* FIXME: free the memory map */
162 void MC_restore_snapshot(mc_snapshot_t snapshot)
165 for(i=0; i < snapshot->num_reg; i++){
166 MC_region_restore(snapshot->regions[i]);
167 switch(snapshot->regions[i]->type){
169 XBT_DEBUG("heap restored");
172 XBT_DEBUG("libsimgrid (data) restored");
175 XBT_DEBUG("program (data) restored");
178 XBT_DEBUG("stack restored");
186 void MC_free_snapshot(mc_snapshot_t snapshot)
189 for(i=0; i < snapshot->num_reg; i++)
190 MC_region_destroy(snapshot->regions[i]);