/* This test program is part of GDB, the GNU debugger. Copyright 2015-2021 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ void iter_str (const char *str, void (*callback) (char c)) { for (; *str != '\0'; ++str) callback (*str); } int length_str (const char *str) { int count = 0; void increment (char c) { /* Here with COUNT, we can test that GDB can read a non-local variable even though it's not directly in the upper stack frame. */ count += 1; /* STOP */ } iter_str (str, &increment); return count; } int main () { if (length_str ("foo") == 3) return 0; return 1; }