KAB is an automated git bisect tool to locate bad commit. It aims at debuging kdump, but the framework itself is general enough to be easily adopted to bisect other kernel projects.
You need a stable computer system with kdump operational.
Clone this repository and install KAB with command make install
One should provide mailbox, kernel source path, etc to KAB by edit variables in /etc/kdump-auto-bisect.conf. esmtp should be configured properly if you want to receive report via email. An esmtprc template is available in KAB's directory.
To start auto-bisect, run kab.sh <good-commit> <bad-commit> in kernel source
directory. KAB will then locate the first bad commit automatically. You will
receive a report email if success, if you provide mailbox in configuration. You
can check also the log file on the local machine or a remote machine, if you
configured, to get information.
After this script find the first bad commit, it will stop automatically.
To stop the process manually, you should log in the system via level 1 (Single User Mode) and disable the service called kdump-auto-bisect:
systemctl disable kdump-auto-bisect
There is no such thing as an automated debugger. Debuging involves human engagement. Alhough KAB is designed for most cases, you may want to get your hands wet to customize KAB to suit your specific conditions.
You may want to modify 'kernel_compile_install' in kab-lib.sh if common compilation and installation precedure cannot satisfy your amazing systems.
You may want to modify 'detect_good_bad' in kab-lib.sh if the existence of /var/crash/ is not your standard to judge good commits or bad ones.
This script is crappy but somewhat comprehensive. You can update any part of it. You can send me your modification if you want to. Any other feedbacks are also welcome.