+static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
+ variable_value_t value = xbt_new0(s_variable_value_t, 1);
+ value->type = strdup(type);
+ if(strcmp(type, "value") == 0){
+ value->value.res = val;
+ }else{
+ value->value.address = (void *)val;
+ }
+ xbt_dynar_push(*list, &value);
+}
+
+static xbt_dynar_t take_snapshot_stacks(void *heap){
+
+ xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
+
+ unsigned int cursor1 = 0;
+ stack_region_t current_stack;
+
+ xbt_dynar_foreach(stacks_areas, cursor1, current_stack){
+ mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
+ st->local_variables = get_local_variables_values(current_stack->context, heap);
+ st->stack_pointer = get_stack_pointer(current_stack->context, heap);
+ xbt_dynar_push(res, &st);
+ }
+
+ return res;
+
+}
+
+static void *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_strbuff_t get_local_variables_values(void *stack_context, void *heap){
+
+ 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;
+
+ xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), NULL);
+
+ xbt_strbuff_t variables = xbt_strbuff_new();
+ xbt_dict_cursor_t dict_cursor;
+ char *variable_name;
+ dw_local_variable_t current_variable;
+ unsigned int cursor = 0, cursor2 = 0;
+ dw_location_entry_t entry = NULL;
+ dw_location_t location_entry = NULL;
+ unw_word_t res;
+ int frame_found = 0;
+ void *frame_pointer_address = NULL;
+ long true_ip;
+
+ 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);
+
+ xbt_strbuff_append(variables, bprintf("ip=%s\n", frame_name));
+
+ frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
+
+ if(frame == NULL){
+ ret = unw_step(&c);
+ continue;
+ }
+
+ true_ip = (long)frame->low_pc + (long)off;
+
+ /* Get frame pointer */
+ switch(frame->frame_base->type){
+ case e_dw_loclist:
+ while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
+ 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:
+ xbt_dynar_reset(compose);
+ cursor2 = 0;
+ while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
+ location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
+ switch(location_entry->type){
+ case e_dw_register:
+ unw_get_reg(&c, location_entry->location.reg, &res);
+ add_value(&compose, "address", (long)res);
+ break;
+ case e_dw_bregister_op:
+ unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
+ add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
+ break;
+ default:
+ xbt_dynar_reset(compose);
+ break;
+ }
+ cursor2++;
+ }
+
+ if(xbt_dynar_length(compose) > 0){
+ frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
+ }
+ break;
+ default :
+ frame_pointer_address = NULL;
+ break;
+ }
+ }
+ cursor++;
+ }
+ break;
+ default :
+ frame_pointer_address = NULL;
+ break;
+ }
+
+ frame_found = 0;
+ cursor = 0;
+
+ xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
+ if(current_variable->location != NULL){
+ switch(current_variable->location->type){
+ case e_dw_compose:
+ xbt_dynar_reset(compose);
+ cursor = 0;
+ while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
+ location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
+ switch(location_entry->type){
+ case e_dw_register:
+ unw_get_reg(&c, location_entry->location.reg, &res);
+ add_value(&compose, "value", (long)res);
+ break;
+ case e_dw_bregister_op:
+ unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
+ add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
+ break;
+ case e_dw_fbregister_op:
+ if(frame_pointer_address != NULL)
+ add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
+ break;
+ default:
+ xbt_dynar_reset(compose);
+ break;
+ }
+ cursor++;
+ }
+
+ if(xbt_dynar_length(compose) > 0){
+ if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
+ xbt_strbuff_append(variables, bprintf("%s=%lx\n", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res));
+ }else{
+ if((long)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address < 0 || *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) == NULL){
+ xbt_strbuff_append(variables, bprintf("%s=NULL\n", current_variable->name));
+ }else if(((long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) > 0xffffffff) || ((long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) < (long)start_text_binary)){
+ xbt_strbuff_append(variables, bprintf("%s=%d\n", current_variable->name, (int)(long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address)));
+ }else{
+ xbt_strbuff_append(variables, bprintf("%s=%p\n", current_variable->name, *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address)));
+ }
+ }
+ }else{
+ xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
+ }
+ break;
+ default :
+ break;
+ }
+ }else{
+ xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
+ }
+ }
+
+ ret = unw_step(&c);
+
+ }
+
+ return variables;
+
+}
+
+static void print_local_variables_values(xbt_dynar_t all_variables){
+
+ unsigned cursor = 0;
+ mc_snapshot_stack_t stack;
+
+ xbt_dynar_foreach(all_variables, cursor, stack){
+ XBT_INFO("%s", stack->local_variables->data);
+ }
+}
+
+
+static void snapshot_stack_free(mc_snapshot_stack_t s){
+ if(s){
+ xbt_free(s->local_variables->data);
+ xbt_free(s->local_variables);
+ xbt_free(s);
+ }
+}
+
+void snapshot_stack_free_voidp(void *s){
+ snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
+}
+
+void *MC_snapshot(void){
+
+ return simcall_mc_snapshot();
+
+}