How do I debug coroutine suspension points in C++?

Debugging coroutine suspension points in C++ can be challenging due to the asynchronous nature of coroutines. Here are some steps and techniques you can utilize to debug these suspension points effectively.

Understanding Coroutine Suspension

Coroutines allow functions to exit and resume at a later time, which can complicate the debugging process. To navigate this, you can use proper logging, breakpoints, and understanding of coroutine states.

Techniques for Debugging

  • Logging: Insert logging statements before and after suspension points to track the flow.
  • Breakpoints: Set breakpoints in your IDE at points of suspension to inspect the state of the coroutine.
  • Coroutine State Representation: Use variables to represent the state of your coroutine, making it easier to debug.

Example Code

std::coroutine_handle<> my_coroutine() { std::cout << "Coroutine started" << std::endl; co_await some_async_operation(); std::cout << "Coroutine resumed after suspension" << std::endl; co_return; }

Debugging Coroutine C++ Suspension Points Asynchronous Programming

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