size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
strings = backtrace_symbols(stack_frames, size);
for (i = 0; i < size; i++) {
size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
strings = backtrace_symbols(stack_frames, size);
for (i = 0; i < size; i++) {