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Mastering Embedded Linux Development

You're reading from   Mastering Embedded Linux Development Craft fast and reliable embedded solutions with Linux 6.6 and The Yocto Project 5.0 (Scarthgap)

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Product type Paperback
Published in May 2025
Publisher Packt
ISBN-13 9781803232591
Length 710 pages
Edition 4th Edition
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Authors (2):
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Frank Vasquez Frank Vasquez
Author Profile Icon Frank Vasquez
Frank Vasquez
Chris Simmonds Chris Simmonds
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Chris Simmonds
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Toc

Table of Contents (28) Chapters Close

Preface 1. Part 1: Elements of Embedded Linux
2. Starting Out FREE CHAPTER 3. Learning about Toolchains 4. All about Bootloaders 5. Configuring and Building the Kernel 6. Building a Root Filesystem 7. Part 2: Building Embedded Linux Images
8. Selecting a Build System 9. Developing with Yocto 10. Yocto under the Hood 11. Part 3: System Architecture and Design Decisions
12. Creating a Storage Strategy 13. Updating Software in the Field 14. Interfacing with Device Drivers 15. Prototyping with Add-On Boards 16. Starting Up – The init Program 17. Managing Power 18. Part 4: Developing Applications
19. Packaging Python 20. Deploying Container Images 21. Learning about Processes and Threads 22. Managing Memory 23. Part 5: Debugging and Optimizing Performance
24. Debugging with GDB 25. Profiling and Tracing 26. Real-Time Programming 27. Index

Debugging forks and threads

What happens when the program you are debugging forks? Does the debug session follow the parent process or the child? This behavior is controlled by follow-fork-mode, which may be parent or child, with parent being the default. Unfortunately, current versions of gdbserver do not support this option, so it only works for native debugging. If you really need to debug the child process while using gdbserver, a workaround is to modify the code so that the child loops on a variable immediately after the fork, giving you the opportunity to attach a new gdbserver session to it and then to set the variable so that it drops out of the loop.

When a thread in a multithreaded process hits a breakpoint, the default behavior is for all threads to halt. In most cases, this is the best thing to do as it allows you to look at static variables without them being changed by the other threads. When you resume execution of the thread, all the stopped threads start up, even...

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