#elif USE(PTHREADS)
    void* stackBase = 0;
    size_t stackSize = 0;
#ifdef OS(HAIKU)
					int rc = pthread_attr_getstacksize(&regs, &stackSize);
#else
 				int rc = pthread_attr_getstack(&regs, &stackBase, &stackSize);
#endif
    (void)rc; // FIXME: Deal with error code somehow? Seems fatal.
    ASSERT(stackBase);
    return static_cast<char*>(stackBase) + stackSize;