// chudxnu_thread_get_callstack gathers a raw callstack along with any information needed to
// fix it up later (in case we stopped program as it was saving values into prev stack frame, etc.)
// after sampling has finished.
// chudxnu_thread_get_callstack gathers a raw callstack along with any information needed to
// fix it up later (in case we stopped program as it was saving values into prev stack frame, etc.)
// after sampling has finished.