How Can I Efficiently Retrieve and Display C Exception Stack Traces?

Retrieving Exception Stack Traces

Displaying stack traces upon encountering exceptions provides a crucial debugging tool for identifying the source of errors. Here's how to achieve this in a portable manner:

Andrew Grant's solution fails to capture the stack trace at the point of exception throwing, as it does not automatically save it. Instead, it's necessary to create an exception class that captures the stack trace at the moment of throw.

Updated Options for Stack Trace Generation (2023)

• C 23 : C 23 introduces this feature, with some standard library implementations already offering support or partial support.
• Boost stacktrace: Reference implementation for that is customizable but requires configuration and dependencies.
• Backward-cpp: An established library offering detailed information, including code snippets for each frame. Requires system-specific configuration and dependencies.
• Cpptrace: A simplified and portable library with self-contained functionality.

C 26 Enhancements (2024)

• P2490 aims to add [[with_stacktrace]] and std::stacktrace::from_current_exception to C 26.
• Cpptrace also offers a C 11 implementation for retrieving stack traces from caught exceptions.

Example Implementation with Cpptrace:

CPPTRACE_TRY {
    // Code that may throw an exception
} CPPTRACE_CATCH(const std::exception& e) {
    std::cerr << "Exception: " << e.what() << std::endl;
    cpptrace::from_current_exception().print();
}

By utilizing these techniques, you can effectively display stack traces, enabling users to report errors accurately and providing invaluable information for troubleshooting.

The above is the detailed content of How Can I Efficiently Retrieve and Display C Exception Stack Traces?. For more information, please follow other related articles on the PHP Chinese website!