stack_min         337 gc/win32_threads.c   ptr_t sp, stack_min;
stack_min         392 gc/win32_threads.c       stack_min = GC_get_stack_min(thread->stack_base);
stack_min         394 gc/win32_threads.c       if (sp >= stack_min && sp < thread->stack_base)
stack_min         399 gc/win32_threads.c         GC_push_all_stack(stack_min, thread->stack_base);