+/************************************* Take Snapshot ************************************/
+/****************************************************************************************/
+
+static void MC_get_hash_global(char *snapshot_hash, void *data1, void *data2){
+
+ /* unsigned int cursor = 0; */
+ /* size_t offset; */
+ /* global_variable_t current_var; */
+ /* void *addr_pointed = NULL; */
+ /* void *res = NULL; */
+
+ /* xbt_strbuff_t clear = xbt_strbuff_new(); */
+
+ /* xbt_dynar_foreach(mc_global_variables, cursor, current_var){ */
+ /* if(current_var->address < start_data_libsimgrid){ /\* binary *\/ */
+ /* offset = (char *)current_var->address - (char *)start_data_binary; */
+ /* addr_pointed = *((void **)((char *)data2 + offset)); */
+ /* if(((addr_pointed >= start_plt_binary && addr_pointed <= end_plt_binary)) || ((addr_pointed >= std_heap && (char *)addr_pointed <= (char *)std_heap + STD_HEAP_SIZE ))) */
+ /* continue; */
+ /* res = xbt_malloc0(current_var->size + 1); */
+ /* memset(res, 0, current_var->size + 1); */
+ /* memcpy(res, (char*)data2 + offset, current_var->size); */
+ /* }else{ /\* libsimgrid *\/ */
+ /* offset = (char *)current_var->address - (char *)start_data_libsimgrid; */
+ /* addr_pointed = *((void **)((char *)data1 + offset)); */
+ /* if((addr_pointed >= start_plt_libsimgrid && addr_pointed <= end_plt_libsimgrid) || (addr_pointed >= std_heap && (char *)addr_pointed <= (char *)std_heap + STD_HEAP_SIZE )) */
+ /* continue; */
+ /* res = xbt_malloc0(current_var->size + 1); */
+ /* memset(res, 0, current_var->size + 1); */
+ /* memcpy(res, (char*)data1 + offset, current_var->size); */
+ /* } */
+ /* if(res != NULL){ */
+ /* xbt_strbuff_append(clear, (const char*)res); */
+ /* xbt_free(res); */
+ /* res = NULL; */
+ /* } */
+ /* } */
+
+ /* xbt_sha(clear->data, snapshot_hash); */
+
+ /* xbt_strbuff_free(clear); */
+
+}
+
+static void MC_get_hash_local(char *snapshot_hash, xbt_dynar_t stacks){
+
+ /* xbt_dynar_t tokens = NULL, s_tokens = NULL; */
+ /* unsigned int cursor1 = 0, cursor2 = 0; */
+ /* mc_snapshot_stack_t current_stack; */
+ /* char *frame_name = NULL; */
+ /* void *addr; */
+
+ /* xbt_strbuff_t clear = xbt_strbuff_new(); */
+
+ /* while(cursor1 < xbt_dynar_length(stacks)){ */
+ /* current_stack = xbt_dynar_get_as(stacks, cursor1, mc_snapshot_stack_t); */
+ /* tokens = xbt_str_split(current_stack->local_variables->data, NULL); */
+ /* cursor2 = 0; */
+ /* while(cursor2 < xbt_dynar_length(tokens)){ */
+ /* s_tokens = xbt_str_split(xbt_dynar_get_as(tokens, cursor2, char *), "="); */
+ /* if(xbt_dynar_length(s_tokens) > 1){ */
+ /* if(strcmp(xbt_dynar_get_as(s_tokens, 0, char *), "frame_name") == 0){ */
+ /* xbt_free(frame_name); */
+ /* frame_name = xbt_strdup(xbt_dynar_get_as(s_tokens, 1, char *)); */
+ /* xbt_strbuff_append(clear, (const char*)xbt_dynar_get_as(tokens, cursor2, char *)); */
+ /* cursor2++; */
+ /* xbt_dynar_free(&s_tokens); */
+ /* continue; */
+ /* } */
+ /* addr = (void *) strtoul(xbt_dynar_get_as(s_tokens, 1, char *), NULL, 16); */
+ /* if(addr > std_heap && (char *)addr <= (char *)std_heap + STD_HEAP_SIZE){ */
+ /* cursor2++; */
+ /* xbt_dynar_free(&s_tokens); */
+ /* continue; */
+ /* } */
+ /* if(is_stack_ignore_variable(frame_name, xbt_dynar_get_as(s_tokens, 0, char *))){ */
+ /* cursor2++; */
+ /* xbt_dynar_free(&s_tokens); */
+ /* continue; */
+ /* } */
+ /* xbt_strbuff_append(clear, (const char *)xbt_dynar_get_as(tokens, cursor2, char *)); */
+ /* } */
+ /* xbt_dynar_free(&s_tokens); */
+ /* cursor2++; */
+ /* } */
+ /* xbt_dynar_free(&tokens); */
+ /* cursor1++; */
+ /* } */
+
+ /* xbt_free(frame_name); */
+
+ /* xbt_sha(clear->data, snapshot_hash); */
+
+ /* xbt_strbuff_free(clear); */
+
+}
+
+static xbt_dynar_t MC_get_local_variables_values(void *stack_context){
+
+ unw_cursor_t c;
+ int ret;
+
+ char frame_name[256];
+
+ ret = unw_init_local(&c, (unw_context_t *)stack_context);
+ if(ret < 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
+ }
+
+ unw_word_t ip, sp, off;
+ dw_frame_t frame;
+
+ unsigned int cursor = 0;
+ dw_variable_t current_variable;
+ dw_location_entry_t entry = NULL;
+ dw_location_t location_entry = NULL;
+ unw_word_t res;
+ int frame_found = 0, region_type;
+ void *frame_pointer_address = NULL;
+ long true_ip, value;
+
+ xbt_dynar_t variables = xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
+
+ while(ret >= 0){
+
+ unw_get_reg(&c, UNW_REG_IP, &ip);
+ unw_get_reg(&c, UNW_REG_SP, &sp);
+
+ unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
+
+ if((long)ip > (long)start_text_libsimgrid)
+ frame = xbt_dict_get_or_null(mc_local_variables_libsimgrid, frame_name);
+ else
+ frame = xbt_dict_get_or_null(mc_local_variables_binary, frame_name);
+
+ if(frame == NULL){
+ ret = unw_step(&c);
+ continue;
+ }
+
+ true_ip = (long)frame->low_pc + (long)off;
+ frame_pointer_address = NULL;
+
+ /* Get frame pointer */
+ switch(frame->frame_base->type){
+ case e_dw_loclist:
+ cursor = 0;
+ while(cursor < xbt_dynar_length(frame->frame_base->location.loclist) && !frame_found){
+ entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
+ if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
+ frame_found = 1;
+ switch(entry->location->type){
+ case e_dw_compose:
+ if(xbt_dynar_length(entry->location->location.compose) > 1){
+ frame_pointer_address = NULL; /* TODO : location list with optimizations enabled */
+ }else{
+ location_entry = xbt_dynar_get_as(entry->location->location.compose, 0, dw_location_t);
+ switch(location_entry->type){
+ case e_dw_register:
+ unw_get_reg(&c, location_entry->location.reg, &res);
+ frame_pointer_address = (void*)(long)res;
+ break;
+ case e_dw_bregister_op:
+ unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
+ frame_pointer_address = (void*)((long)res + location_entry->location.breg_op.offset);
+ break;
+ default:
+ frame_pointer_address = NULL; /* FIXME : implement other cases (with optimizations enabled) */
+ break;
+ }
+ }
+ break;
+ default:
+ frame_pointer_address = NULL; /* FIXME : implement other cases (with optimizations enabled) */
+ break;
+ }
+ }
+ cursor++;
+ }
+ break;
+ default :
+ frame_pointer_address = NULL; /* FIXME : implement other cases (with optimizations enabled)*/
+ break;
+ }
+
+ frame_found = 0;
+ cursor = 0;
+
+ xbt_dynar_foreach(frame->variables, cursor, current_variable){
+
+ if((long)ip > (long)start_text_libsimgrid)
+ region_type = 1;
+ else
+ region_type = 2;
+
+ local_variable_t new_var = xbt_new0(s_local_variable_t, 1);
+ new_var->frame = xbt_strdup(frame_name);
+ new_var->ip = (unsigned long)ip;
+ new_var->name = xbt_strdup(current_variable->name);
+ new_var->type = strdup(current_variable->type_origin);
+ new_var->region= region_type;
+
+ if(current_variable->address.location != NULL){
+ switch(current_variable->address.location->type){
+ case e_dw_compose:
+ if(xbt_dynar_length(current_variable->address.location->location.compose) > 1){
+ /* TODO : location list with optimizations enabled */
+ }else{
+ location_entry = xbt_dynar_get_as(current_variable->address.location->location.compose, 0, dw_location_t);
+
+ switch(location_entry->type){
+ case e_dw_register:
+ unw_get_reg(&c, location_entry->location.reg, &res);
+ value = (long)res;
+ break;
+ case e_dw_bregister_op:
+ unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
+ value = (long)res + location_entry->location.breg_op.offset;
+ break;
+ case e_dw_fbregister_op:
+ if(frame_pointer_address != NULL)
+ value = (long)((char *)frame_pointer_address + location_entry->location.fbreg_op);
+ else
+ value = 0;
+ break;
+ default:
+ value = 0; /* FIXME : implement other cases (with optimizations enabled)*/
+ break;
+ }
+
+ if(value)
+ new_var->address = (void *)value;
+ else
+ new_var->address = NULL;
+ }
+ break;
+ default :
+ break;
+ }
+ }
+
+ xbt_dynar_push(variables, &new_var);
+
+ }
+
+ ret = unw_step(&c);
+
+ }
+
+ return variables;
+
+}
+
+
+static void *MC_get_stack_pointer(void *stack_context, void *heap){
+
+ unw_cursor_t c;
+ int ret;
+ unw_word_t sp;
+
+ ret = unw_init_local(&c, (unw_context_t *)stack_context);
+ if(ret < 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
+ }
+
+ unw_get_reg(&c, UNW_REG_SP, &sp);
+
+ return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
+
+}
+
+static xbt_dynar_t MC_take_snapshot_stacks(mc_snapshot_t *snapshot, void *heap){
+
+ xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), MC_snapshot_stack_free_voidp);
+
+ unsigned int cursor = 0;
+ stack_region_t current_stack;
+
+ xbt_dynar_foreach(stacks_areas, cursor, current_stack){
+ mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
+ st->local_variables = MC_get_local_variables_values(current_stack->context);
+ st->stack_pointer = MC_get_stack_pointer(current_stack->context, heap);
+ st->real_address = current_stack->address;
+ xbt_dynar_push(res, &st);
+ (*snapshot)->stack_sizes = xbt_realloc((*snapshot)->stack_sizes, (cursor + 1) * sizeof(size_t));
+ (*snapshot)->stack_sizes[cursor] = current_stack->size - ((char *)st->stack_pointer - (char *)((char *)heap + ((char *)current_stack->address - (char *)std_heap)));
+ }
+
+ return res;
+
+}
+
+static xbt_dynar_t MC_take_snapshot_ignore(){
+
+ if(mc_heap_comparison_ignore == NULL)
+ return NULL;
+
+ xbt_dynar_t cpy = xbt_dynar_new(sizeof(mc_heap_ignore_region_t), heap_ignore_region_free_voidp);
+
+ unsigned int cursor = 0;
+ mc_heap_ignore_region_t current_region;
+
+ xbt_dynar_foreach(mc_heap_comparison_ignore, cursor, current_region){
+ mc_heap_ignore_region_t new_region = NULL;
+ new_region = xbt_new0(s_mc_heap_ignore_region_t, 1);
+ new_region->address = current_region->address;
+ new_region->size = current_region->size;
+ new_region->block = current_region->block;
+ new_region->fragment = current_region->fragment;
+ xbt_dynar_push(cpy, &new_region);
+ }
+
+ return cpy;
+
+}
+
+
+mc_snapshot_t MC_take_snapshot(){
+
+ int raw_mem = (mmalloc_get_current_heap() == raw_heap);
+
+ MC_SET_RAW_MEM;
+
+ mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ snapshot->nb_processes = xbt_swag_size(simix_global->process_list);
+
+ /* Save the std heap and the writable mapped pages of libsimgrid and binary */
+ MC_get_memory_regions(snapshot);
+
+ snapshot->to_ignore = MC_take_snapshot_ignore();
+
+ if(_sg_mc_visited > 0 || strcmp(_sg_mc_property_file,"")){
+ snapshot->stacks = MC_take_snapshot_stacks(&snapshot, snapshot->regions[0]->data);
+ //MC_get_hash_global(snapshot->hash_global, snapshot->regions[1]->data, snapshot->regions[2]->data);
+ //MC_get_hash_local(snapshot->hash_local, snapshot->stacks);
+ }
+
+ MC_UNSET_RAW_MEM;
+
+ if(raw_mem)
+ MC_SET_RAW_MEM;
+
+ return snapshot;
+
+}
+
+void MC_restore_snapshot(mc_snapshot_t snapshot){
+ unsigned int i;
+ for(i=0; i < NB_REGIONS; i++){
+ MC_region_restore(snapshot->regions[i]);
+ }
+
+}
+
+void MC_free_snapshot(mc_snapshot_t snapshot){
+ unsigned int i;
+ for(i=0; i < NB_REGIONS; i++)
+ MC_region_destroy(snapshot->regions[i]);
+
+ xbt_free(snapshot->stack_sizes);
+ xbt_dynar_free(&(snapshot->stacks));
+ xbt_dynar_free(&(snapshot->to_ignore));
+ xbt_free(snapshot);
+}
+
+mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
+ return MC_take_snapshot();
+}
+
+void *MC_snapshot(void){
+ return simcall_mc_snapshot();
+}