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Debug Stacktrace

  • Book Excerpt from "Generative AI in C++"
  • by David Spuler, Ph.D.

Debug Stacktrace

There are various situations where it can be useful to have a programmatic method for reporting the “stack trace” or “backtrace” of the function call stack in C++. Some examples include:

  • Your assertion macro can report the full stack trace on failure.
  • Self-testing code similarly can report the location.
  • Debug wrapper functions too.
  • Writing your own memory allocation tracker library.

C++ is about to have standard stacktrace capabilities with its standardization in C++23. This is available via the “std::stacktrace” facility, such as printing the current stack via: 

    std::cout << "Stacktrace: " << std::stacktrace::current() << std::endl;

The C++23 stacktrace library is already supported by GCC and early support in MSVS is available via a compiler flag “/std:c++latest”. There are also two different longstanding implementations of stacktrace capabilities: glibc backtrace and Boost StackTrace. The C++23 standardized version is based on Boost's version.

 

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