如何在调试器中访问 pybind11 array_t<> 数据指针

Question

我想在进入调试器时访问 pybind11::array_t<T> 类型的 NumPy 数组包装器的数据指针。如下所示，调试器不知道 array_t<T> 的类型，因此 data(...)/mutable_data(...) 访问器不可用。

(lldb) p o
(pybind11::array_t<unsigned long long, 16>)  = {
  pybind11::array = {
    pybind11::buffer = {
      pybind11::object = {
        pybind11::handle = (m_ptr = '0x10872fe40')
      }
    }
  }
}
(lldb) p o.data()
error: no member named 'data' in 'pybind11::array_t<unsigned long long, 16>'
(lldb) p o.data(0)
error: no member named 'data' in 'pybind11::array_t<unsigned long long, 16>'

Answer 1

基于pybind11的numpy.h中array_t::data的实现，解决方案是使用pybind11::detail::array_proxy访问数据指针：

(lldb) p ((uint64_t*)pybind11::detail::array_proxy(o.m_ptr)->data)[652]
(uint64_t)  = 87112

如何在调试器中访问 pybind11 array_t<> 数据指针

How to access pybind11 array_t<> data pointer in debugger

c++

pybind11