Function _Unwind_Resume

system/lib/libunwind/src/Unwind-seh.cpp:422–456

When \c _Unwind_RaiseException() is in phase2, it hands control to the personality function at each frame. The personality may force a jump to a landing pad in that function; the landing pad code may then call \c _Unwind_Resume() to continue with the unwinding. Note: the call to \c _Unwind_Resume() is from compiler generated user code. All other \c _Unwind_* routines are called by the C++ runti

/// is implemented by having the code call \c __cxa_rethrow() which
/// in turn calls \c _Unwind_Resume_or_Rethrow().
_LIBUNWIND_EXPORT void
_Unwind_Resume(_Unwind_Exception *exception_object) {
  _LIBUNWIND_TRACE_API("_Unwind_Resume(ex_obj=%p)", (void *)exception_object);

  if (exception_object->private_[0] != 0) {
    unw_context_t uc;

    __unw_getcontext(&uc);
    unwind_phase2_forced(&uc, exception_object,
                         (_Unwind_Stop_Fn) exception_object->private_[0],
                         (void *)exception_object->private_[4]);
  } else {
    // Recover the parameters for the unwind from the exception object
    // so we can start unwinding again.
    EXCEPTION_RECORD ms_exc;
    CONTEXT ms_ctx;
    UNWIND_HISTORY_TABLE hist;

    memset(&ms_exc, 0, sizeof(ms_exc));
    memset(&hist, 0, sizeof(hist));
    ms_exc.ExceptionCode = STATUS_GCC_THROW;
    ms_exc.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
    ms_exc.NumberParameters = 4;
    ms_exc.ExceptionInformation[0] = (ULONG_PTR)exception_object;
    ms_exc.ExceptionInformation[1] = exception_object->private_[1];
    ms_exc.ExceptionInformation[2] = exception_object->private_[2];
    ms_exc.ExceptionInformation[3] = exception_object->private_[3];
    RtlUnwindEx((PVOID)exception_object->private_[1],
                (PVOID)exception_object->private_[2], &ms_exc,
                exception_object, &ms_ctx, &hist);
  }

  // Clients assume _Unwind_Resume() does not return, so all we can do is abort.
  _LIBUNWIND_ABORT("_Unwind_Resume() can't return");
}

/// Not used by C++.
/// Unwinds stack, calling "stop" function at each frame.