Debugging

FAQ

  1. What support does Boost provide for debugging and testing?

    Boost provides Boost.Test for unit testing, which can be an integral part of the debugging process. It also provides the Boost.Stacktrace library that can be used to produce useful debug information during a crash or from a running application. Refer also to Category: Correctness and testing.

  2. How do I enable assertions in Boost?

    Boost uses its own set of assertion macros. By default, BOOST_ASSERT is enabled, but if it fails, it only calls abort(). If you define BOOST_ENABLE_ASSERT_HANDLER before including any Boost header, then you need to supply boost::assertion_failed(msg, code, file, line) and boost::assertion_failed_msg(msg, code, file, line) functions to handle failed assertions.

  3. How can I get a stack trace when my program crashes?

    You can use the Boost.Stacktrace library to obtain a stack trace in your application. You can capture and print stack traces in your catch blocks, in signal handlers, or anywhere in your program where you need to trace the execution path.

  4. Can I use Boost with a debugger like GDB or Visual Studio?

    Yes, Boost libraries can be used with common debuggers like GDB or Visual Studio. You can set breakpoints in your code, inspect variables, and execute code step by step. Boost doesn’t interfere with these debugging tools.

  5. Are there any debugging tools specifically provided by Boost?

    Boost doesn’t provide a debugger itself. The libraries tend to make heavy use of assertions to catch programming errors, and they often provide clear and detailed error messages when something goes wrong.

  6. What are best practices when using Boost Asserts?

    Boost provides the assertion boost::assert. Best practices when using this are:

    • Use Assertions for Debugging and Development: Boost assertions should primarily be used during the debugging and development phase of your application. Assertions are designed to catch programming errors, not user errors.

    • Assert Conditions That Should Never Occur: You should only assert conditions that you believe can never occur during normal operation of your application. If there’s a chance that a condition may occur, handle it as an exception or error rather than asserting.

    • Provide Meaningful Assert Messages: Boost assertions allow you to provide a message alongside your assertion. Use this feature to provide meaningful context about why an assertion failed.

    • Consider Performance Impact: Boost assertions can slow down your application. In performance-critical code, consider disabling them in the production version of your application.

  7. What is the recommended approach to logging, using boost::log?

    • Use Severity Levels: Boost.Log supports severity levels, which you can use to categorize and filter your log messages. This can help you control the amount of log output and focus on what’s important.

    • Provide Context: Boost.Log allows you to attach arbitrary data to your log messages, such as thread IDs, timestamps, or file and line information. Use this feature to provide context that can help you understand the state of your application when the log message was generated.

    • Use Asynchronous Logging: If logging performance is a concern, consider using the asynchronous logging feature. This allows your application to continue executing while log messages are processed in a separate thread.

    • Format Your Log Output: Boost.Log supports customizable log formatting. Use this feature to ensure that your log output is easy to read and contains all the information you need.

    • Handle Log Rotation: If your application produces a lot of log output, consider setting up log rotation, which is supported. This ensures that your log files don’t grow indefinitely.

See Also

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