C++ (Cpp) expr_to_var_sym Examples

Example #1

File: check_wine_filehandles.c Project: ecashin/smatch

static void match_returns_handle(const char *fn, struct expression *expr,
			     void *info)
{
	char *left_name = NULL;
	struct symbol *left_sym;

	left_name = expr_to_var_sym(expr->left, &left_sym);
	if (!left_name || !left_sym)
		goto free;
	set_state_expr(my_id, expr->left, &filehandle);
free:
	free_string(left_name);
}

Example #2

File: check_allocation_funcs.c Project: UIKit0/smatch

static void match_allocation(const char *fn, struct expression *expr,
			     void *info)
{
	char *left_name;
	struct symbol *left_sym;

	left_name = expr_to_var_sym(expr->left, &left_sym);
	if (!left_name || !left_sym)
		goto free;
	if (left_sym->ctype.modifiers & 
	    (MOD_NONLOCAL | MOD_STATIC | MOD_ADDRESSABLE))
		goto free;
	add_tracker(&allocated, my_id, left_name, left_sym);
free:
	free_string(left_name);
}

Example #3

File: check_allocation_funcs.c Project: UIKit0/smatch

static void match_return(struct expression *ret_value)
{
	char *name;
	struct symbol *sym;
	sval_t tmp;

	if (__inline_fn)
		return;
	if (get_value(ret_value, &tmp) && tmp.value == 0)
		return;
	returns_new_stuff = 1;
	name = expr_to_var_sym(ret_value, &sym);
	if (!name || !sym) {
		returns_old_stuff = 1;
		goto free;
	}
	if (!in_tracker_list(allocated, my_id, name, sym))
		returns_old_stuff = 1;
free:
	free_string(name);
}

Example #4

File: check_get_user_overflow.c Project: UIKit0/smatch

static void check_expr(struct expression *expr)
{
	struct sm_state *sm;
	sval_t max;
	sval_t sval;
	char *name;
	int overflow = 0;
	int underflow = 0;

	sm = get_sm_state_expr(my_max_id, expr);
	if (sm && slist_has_state(sm->possible, &user_data)) {
		if (!get_absolute_max(expr, &max) || sval_cmp_val(max, 20000) > 0)
			overflow = 1;
	}

	sm = get_sm_state_expr(my_min_id, expr);
	if (sm && slist_has_state(sm->possible, &user_data)) {
		if (!get_absolute_min(expr, &sval) ||
		    (sval_is_negative(sval) && sval_cmp_val(sval, -20000) < 0))
			underflow = 1;
	}

	if (!overflow && !underflow)
		return;

	name = expr_to_var_sym(expr, NULL);
	if (overflow && underflow)
		sm_msg("warn: check for integer over/underflow '%s'", name);
	else if (underflow)
		sm_msg("warn: check for integer underflow '%s'", name);
	else
		sm_msg("warn: check for integer overflow '%s'", name);
	free_string(name);

	set_state_expr(my_max_id, expr, &capped);
	set_state_expr(my_min_id, expr, &capped);
}