+
+/************ DWARF ***********/
+
+static e_dw_location_type get_location(char *expr, dw_location_t entry);
+
+void MC_get_binary_local_variables(){
+
+ char *command = bprintf("dwarfdump -i %s", xbt_binary_name);
+
+ FILE* fp = popen(command, "r");
+
+ if(fp == NULL)
+ perror("popen failed");
+
+ char *line = NULL, *tmp_line = NULL, *tmp_location = NULL, *frame_name = NULL;
+ ssize_t read;
+ size_t n = 0;
+ int valid_variable = 1, valid_frame = 1;
+ char *node_type = NULL, *location_type = NULL, *variable_name = NULL, *lowpc = NULL, *highpc = NULL;
+ xbt_dynar_t split = NULL;
+
+ read = getline(&line, &n, fp);
+
+ while (read != -1) {
+
+ if(n == 0)
+ continue;
+
+ /* Wipeout the new line character */
+ line[read - 1] = '\0';
+
+ if(line[0] == '<'){
+
+ /* Get node type */
+ strtok(line, " ");
+ strtok(NULL, " ");
+ node_type = strtok(NULL, " ");
+
+ if(strcmp(node_type, "DW_TAG_subprogram") == 0){ /* New frame */
+
+ read = getline(&line, &n, fp);
+
+ while(read != -1 && line[0] != '<'){
+
+ if(n == 0)
+ continue;
+
+ node_type = strtok(line, " ");
+
+ if(node_type != NULL && strcmp(node_type, "DW_AT_name") == 0){
+
+ frame_name = strdup(strtok(NULL, " "));
+ read = getline(&line, &n, fp);
+
+ }else if(node_type != NULL && strcmp(node_type, "DW_AT_frame_base") == 0){
+
+ if(valid_frame == 1){
+
+ dw_frame_t frame = xbt_new0(s_dw_frame_t, 1);
+ frame->name = strdup(frame_name);
+ frame->variables = xbt_dynar_new(sizeof(dw_local_variable_t), NULL);
+ frame->location = xbt_new0(s_dw_location_t, 1);
+
+ location_type = strtok(NULL, " ");
+
+ if(strcmp(location_type, "<loclist") == 0){
+
+ frame->location->type = e_dw_loclist;
+ frame->location->location.loclist = xbt_dynar_new(sizeof(dw_location_entry_t), NULL);
+
+ read = getline(&line, &n, fp);
+ xbt_str_ltrim(line, NULL);
+
+ while(read != -1 && line[0] == '['){
+
+ strtok(line, "<");
+ lowpc = strdup(strtok(NULL, "<"));
+ highpc = strdup(strtok(NULL, ">"));
+ tmp_location = strdup(strtok(NULL, ">"));
+ lowpc[strlen(lowpc) - 1] = '\0'; /* Remove last character '>' */
+
+ dw_location_entry_t new_entry = xbt_new0(s_dw_location_entry_t, 1);
+
+ strtok(lowpc, "=");
+ new_entry->lowpc = (void *) strtoul(strtok(NULL, "="), NULL, 16);
+ strtok(highpc, "=");
+ new_entry->highpc = (void *) strtoul(strtok(NULL, "="), NULL, 16);
+
+ new_entry->location = xbt_new0(s_dw_location_t, 1);
+
+ get_location(tmp_location, new_entry->location);
+
+ xbt_dynar_push(frame->location->location.loclist, &new_entry);
+
+ read = getline(&line, &n, fp);
+ xbt_str_ltrim(line, NULL);
+ }
+
+ }else{
+ read = getline(&line, &n, fp);
+ frame->location->type = get_location(location_type, frame->location);
+
+ }
+
+ xbt_dynar_push(mc_binary_local_variables, &frame);
+
+ }else{
+
+ read = getline(&line, &n, fp);
+
+ }
+
+ }else if(node_type != NULL && (strcmp(node_type, "DW_AT_declaration") == 0 || strcmp(node_type, "DW_AT_abstract_origin") == 0 || strcmp(node_type, "DW_AT_artificial") == 0)){
+
+ read = getline(&line, &n, fp);
+ valid_frame = 0;
+
+ }else{
+
+ read = getline(&line, &n, fp);
+
+ }
+
+ }
+
+ valid_frame = 1;
+
+ }else if(strcmp(node_type, "DW_TAG_variable") == 0){ /* New variable */
+
+ variable_name = NULL;
+ location_type = NULL;
+
+ read = getline(&line, &n, fp);
+
+ while(read != -1 && line[0] != '<'){
+
+ if(n == 0)
+ continue;
+
+ tmp_line = strdup(line);
+
+ node_type = strtok(line, " ");
+
+ if(node_type != NULL && strcmp(node_type, "DW_AT_name") == 0){
+
+ variable_name = strdup(strtok(NULL, " "));
+ read = getline(&line, &n, fp);
+
+ }else if(node_type != NULL && strcmp(node_type, "DW_AT_location") == 0){
+
+ if(valid_variable == 1){
+
+ location_type = strdup(strtok(NULL, " "));
+
+ dw_local_variable_t variable = xbt_new0(s_dw_local_variable_t, 1);
+ variable->name = strdup(variable_name);
+ variable->location = xbt_new0(s_dw_location_t, 1);
+
+ if(strcmp(location_type, "<loclist") == 0){
+
+ variable->location->type = e_dw_loclist;
+ variable->location->location.loclist = xbt_dynar_new(sizeof(dw_location_entry_t), NULL);
+
+ read = getline(&line, &n, fp);
+ xbt_str_ltrim(line, NULL);
+
+ while(read != -1 && line[0] == '['){
+
+ strtok(line, "<");
+ lowpc = strdup(strtok(NULL, "<"));
+ highpc = strdup(strtok(NULL, ">"));
+ tmp_location = strdup(strtok(NULL, ">"));
+ lowpc[strlen(lowpc) - 1] = '\0'; /* Remove last character '>' */
+
+ dw_location_entry_t new_entry = xbt_new0(s_dw_location_entry_t, 1);
+
+ strtok(lowpc, "=");
+ new_entry->lowpc = (void *) strtoul(strtok(NULL, "="), NULL, 16);
+ strtok(highpc, "=");
+ new_entry->highpc = (void *) strtoul(strtok(NULL, "="), NULL, 16);
+
+ new_entry->location = xbt_new0(s_dw_location_t, 1);
+
+ get_location(tmp_location, new_entry->location);
+
+ xbt_dynar_push(variable->location->location.loclist, &new_entry);
+
+ read = getline(&line, &n, fp);
+ xbt_str_ltrim(line, NULL);
+ }
+
+ }else{
+
+ xbt_str_strip_spaces(tmp_line);
+ split = xbt_str_split(tmp_line, " ");
+ xbt_dynar_remove_at(split, 0, NULL);
+ location_type = xbt_str_join(split, " ");
+
+ variable->location->type = get_location(location_type, variable->location);
+ read = getline(&line, &n, fp);
+
+ }
+
+ xbt_dynar_push(((dw_frame_t)xbt_dynar_get_as(mc_binary_local_variables, xbt_dynar_length(mc_binary_local_variables) - 1, dw_frame_t))->variables, &variable);
+
+ }else{
+
+ read = getline(&line, &n, fp);
+
+ }
+
+ }else if(node_type != NULL && (strcmp(node_type, "DW_AT_artificial") == 0 || strcmp(node_type, "DW_AT_external") == 0)){
+
+ valid_variable = 0;
+ read = getline(&line, &n, fp);
+
+ }else{
+
+ read = getline(&line, &n, fp);
+
+ }
+
+ }
+
+ valid_variable = 1;
+
+ }else{
+
+ read = getline(&line, &n, fp);
+
+ }
+
+ }else{
+
+ read = getline(&line, &n, fp);
+
+ }
+
+ }
+
+ print_local_variables(mc_binary_local_variables);
+
+ free(line); free(tmp_line); free(tmp_location); free(frame_name);
+ free(node_type); free(location_type); free(variable_name); free(lowpc); free(highpc);
+ free(command);
+ pclose(fp);
+}
+
+void print_local_variables(xbt_dynar_t list){
+
+ dw_frame_t frame;
+ dw_local_variable_t variable;
+ dw_location_entry_t entry;
+ dw_location_t location_entry;
+ unsigned int cursor = 0, cursor2 = 0, cursor3 = 0, cursor4 = 0;
+
+ xbt_dynar_foreach(list, cursor, frame){
+ fprintf(stderr, "Frame name : %s", frame->name);
+ fprintf(stderr, "Location type : %d\n", frame->location->type);
+ fprintf(stderr, "Variables : (%lu)\n", xbt_dynar_length(frame->variables));
+ xbt_dynar_foreach(frame->variables, cursor2, variable){
+ fprintf(stderr, "Name : %s", variable->name);
+ fprintf(stderr, "Location type : %d\n", variable->location->type);
+ switch(variable->location->type){
+ case e_dw_loclist :
+ xbt_dynar_foreach(variable->location->location.loclist, cursor3, entry){
+ fprintf(stderr, "Lowpc : %p, Highpc : %p,", entry->lowpc, entry->highpc);
+ switch(entry->location->type){
+ case e_dw_register :
+ fprintf(stderr, " Location : in register %d\n", entry->location->location.reg);
+ break;
+ case e_dw_bregister_op:
+ fprintf(stderr, " Location : Add %d to the value in register %d\n", entry->location->location.breg_op.offset, entry->location->location.breg_op.reg);
+ break;
+ case e_dw_lit:
+ fprintf(stderr, "Value already kwnown : %d\n", entry->location->location.lit);
+ break;
+ case e_dw_fbregister_op:
+ fprintf(stderr, " Location : %d bytes from logical frame pointer\n", entry->location->location.fbreg_op);
+ break;
+ case e_dw_compose:
+ fprintf(stderr, " Location :\n");
+ xbt_dynar_foreach(entry->location->location.compose, cursor4, location_entry){
+ switch(location_entry->type){
+ case e_dw_register :
+ fprintf(stderr, " %d) in register %d\n", cursor4 + 1, location_entry->location.reg);
+ break;
+ case e_dw_bregister_op:
+ fprintf(stderr, " %d) add %d to the value in register %d\n", cursor4 + 1, location_entry->location.breg_op.offset, location_entry->location.breg_op.reg);
+ break;
+ case e_dw_lit:
+ fprintf(stderr, "%d) Value already kwnown : %d\n", cursor4 + 1, location_entry->location.lit);
+ break;
+ case e_dw_fbregister_op:
+ fprintf(stderr, " %d) %d bytes from logical frame pointer\n", cursor4 + 1, location_entry->location.fbreg_op);
+ break;
+ case e_dw_deref:
+ fprintf(stderr, " %d) Pop the stack entry and treats it as an address (size of data %d)\n", cursor4 + 1, location_entry->location.deref_size);
+ break;
+ case e_dw_arithmetic :
+ fprintf(stderr, "%d) arithmetic operation : %s\n", cursor4 + 1, location_entry->location.arithmetic);
+ break;
+ case e_dw_piece:
+ fprintf(stderr, "%d) The %d byte(s) previous value\n", cursor4 + 1, location_entry->location.piece);
+ break;
+ case e_dw_constant :
+ fprintf(stderr, "%d) Constant %d\n", cursor4 + 1, location_entry->location.constant.value);
+ break;
+ default :
+ fprintf(stderr, "%d) Location type not supported\n", cursor4 + 1);
+ break;
+ }
+ }
+ break;
+ default:
+ fprintf(stderr, "Location type not supported\n");
+ break;
+ }
+ }
+ break;
+ case e_dw_compose:
+ cursor4 = 0;
+ fprintf(stderr, "Location :\n");
+ xbt_dynar_foreach(variable->location->location.compose, cursor4, location_entry){
+ switch(location_entry->type){
+ case e_dw_register :
+ fprintf(stderr, " %d) in register %d\n", cursor4 + 1, location_entry->location.reg);
+ break;
+ case e_dw_bregister_op:
+ fprintf(stderr, " %d) add %d to the value in register %d\n", cursor4 + 1, location_entry->location.breg_op.offset, location_entry->location.breg_op.reg);
+ break;
+ case e_dw_lit:
+ fprintf(stderr, "%d) Value already kwnown : %d\n", cursor4 + 1, location_entry->location.lit);
+ break;
+ case e_dw_fbregister_op:
+ fprintf(stderr, " %d) %d bytes from logical frame pointer\n", cursor4 + 1, location_entry->location.fbreg_op);
+ break;
+ case e_dw_deref:
+ fprintf(stderr, " %d) Pop the stack entry and treats it as an address (size of data %d)\n", cursor4 + 1, location_entry->location.deref_size);
+ break;
+ case e_dw_arithmetic :
+ fprintf(stderr, "%d) arithmetic operation : %s\n", cursor4 + 1, location_entry->location.arithmetic);
+ break;
+ case e_dw_piece:
+ fprintf(stderr, "%d) The %d byte(s) previous value\n", cursor4 + 1, location_entry->location.piece);
+ break;
+ case e_dw_constant :
+ fprintf(stderr, "%d) Constant %d\n", cursor4 + 1, location_entry->location.constant.value);
+ break;
+ default :
+ fprintf(stderr, "%d) Location type not supported\n", cursor4 + 1);
+ break;
+ }
+ }
+ break;
+ default :
+ fprintf(stderr, "Location type not supported\n");
+ break;
+ }
+ }
+ }
+
+}
+
+static e_dw_location_type get_location(char *expr, dw_location_t entry){
+
+ int cursor = 0;
+ char *tok = NULL, *tmp_tok = NULL;
+
+ xbt_dynar_t tokens = xbt_str_split(expr, NULL);
+ xbt_dynar_remove_at(tokens, xbt_dynar_length(tokens) - 1, NULL);
+
+ if(xbt_dynar_length(tokens) > 1){
+
+ entry->type = e_dw_compose;
+ entry->location.compose = xbt_dynar_new(sizeof(dw_location_t), NULL);
+
+ while(cursor < xbt_dynar_length(tokens)){
+
+ tok = xbt_dynar_get_as(tokens, cursor, char*);
+
+ if(strncmp(tok, "DW_OP_reg", 9) == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_register;
+ if(tok[9] == 'x'){
+ new_element->location.reg = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ }else{
+ new_element->location.reg = atoi(strtok(tok, "DW_OP_reg"));
+ }
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_fbreg") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_fbregister_op;
+ new_element->location.fbreg_op = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strncmp(tok, "DW_OP_breg", 10) == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_bregister_op;
+ if(tok[10] == 'x'){
+ new_element->location.breg_op.reg = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ new_element->location.breg_op.offset = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ }else{
+ if(strchr(tok,'+') != NULL){
+ tmp_tok = strtok(tok,"DW_OP_breg");
+ new_element->location.breg_op.reg = atoi(strtok(tmp_tok,"+"));
+ new_element->location.breg_op.offset = atoi(strtok(NULL,"+"));
+ }else{
+ new_element->location.breg_op.reg = atoi(strtok(tok, "DW_OP_breg"));
+ new_element->location.breg_op.offset = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ }
+ }
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strncmp(tok, "DW_OP_lit", 9) == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_lit;
+ new_element->location.lit = atoi(strtok(tok, "DW_OP_lit"));
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_piece") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_piece;
+ if(strlen(xbt_dynar_get_as(tokens, ++cursor, char*)) > 1)
+ new_element->location.piece = atoi(xbt_dynar_get_as(tokens, cursor, char*));
+ else
+ new_element->location.piece = xbt_dynar_get_as(tokens, cursor, char*)[0] - '0';
+ xbt_dynar_push(entry->location.compose, &new_element);
+
+ }else if(strcmp(tok, "DW_OP_abs") == 0 ||
+ strcmp(tok, "DW_OP_and") == 0 ||
+ strcmp(tok, "DW_OP_div") == 0 ||
+ strcmp(tok, "DW_OP_minus") == 0 ||
+ strcmp(tok, "DW_OP_mod") == 0 ||
+ strcmp(tok, "DW_OP_mul") == 0 ||
+ strcmp(tok, "DW_OP_neg") == 0 ||
+ strcmp(tok, "DW_OP_not") == 0 ||
+ strcmp(tok, "DW_OP_or") == 0 ||
+ strcmp(tok, "DW_OP_plus") == 0 ||
+ strcmp(tok, "DW_OP_plus_uconst") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_arithmetic;
+ new_element->location.arithmetic = strdup(strtok(tok, "DW_OP_"));
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_stack_value") == 0){
+ cursor++;
+ }else if(strcmp(tok, "DW_OP_deref_size") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_deref;
+ if(strlen(xbt_dynar_get_as(tokens, ++cursor, char*)) > 1)
+ new_element->location.deref_size = atoi(xbt_dynar_get_as(tokens, cursor, char*));
+ else
+ new_element->location.deref_size = xbt_dynar_get_as(tokens, cursor, char*)[0] - '0';
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_deref") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_deref;
+ new_element->location.deref_size = sizeof(void *);
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_constu") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_constant;
+ new_element->location.constant.is_signed = 0;
+ new_element->location.constant.bytes = 1;
+ if(strlen(xbt_dynar_get_as(tokens, ++cursor, char*)) > 1)
+ new_element->location.constant.value = atoi(xbt_dynar_get_as(tokens, cursor, char*));
+ else
+ new_element->location.constant.value = xbt_dynar_get_as(tokens, cursor, char*)[0] - '0';
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_consts") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_constant;
+ new_element->location.constant.is_signed = 1;
+ new_element->location.constant.bytes = 1;
+ new_element->location.constant.value = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_const1u") == 0 ||
+ strcmp(tok, "DW_OP_const2u") == 0 ||
+ strcmp(tok, "DW_OP_const4u") == 0 ||
+ strcmp(tok, "DW_OP_const8u") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_constant;
+ new_element->location.constant.is_signed = 0;
+ new_element->location.constant.bytes = tok[11] - '0';
+ if(strlen(xbt_dynar_get_as(tokens, ++cursor, char*)) > 1)
+ new_element->location.constant.value = atoi(xbt_dynar_get_as(tokens, cursor, char*));
+ else
+ new_element->location.constant.value = xbt_dynar_get_as(tokens, cursor, char*)[0] - '0';
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else if(strcmp(tok, "DW_OP_const1s") == 0 ||
+ strcmp(tok, "DW_OP_const2s") == 0 ||
+ strcmp(tok, "DW_OP_const4s") == 0 ||
+ strcmp(tok, "DW_OP_const8s") == 0){
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_constant;
+ new_element->location.constant.is_signed = 1;
+ new_element->location.constant.bytes = tok[11] - '0';
+ new_element->location.constant.value = atoi(xbt_dynar_get_as(tokens, ++cursor, char*));
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }else{
+ dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
+ new_element->type = e_dw_unsupported;
+ xbt_dynar_push(entry->location.compose, &new_element);
+ }
+
+ cursor++;
+
+ }
+
+ free(tok);
+ free(tmp_tok);
+ /*xbt_dynar_free(&tokens);*/
+
+ return e_dw_compose;
+
+ }else{
+
+ if(strncmp(expr, "DW_OP_reg", 9) == 0){
+ entry->type = e_dw_register;
+ entry->location.reg = atoi(strtok(expr,"DW_OP_reg"));
+ }else if(strncmp(expr, "DW_OP_breg", 10) == 0){
+ entry->type = e_dw_bregister_op;
+ tok = strtok(expr, "+");
+ entry->location.breg_op.offset = atoi(strtok(NULL, "+"));
+ entry->location.breg_op.reg = atoi(strtok(tok, "DW_OP_breg"));
+ }else{
+ entry->type = e_dw_unsupported;
+ }
+
+ free(tok);
+ free(tmp_tok);
+
+ return entry->type;
+
+ }
+
+}
