How to debug kernel hang?
đź”— How to Use Kdump
- First, install the kexec-tools , crash and kernel-debuginfo packages using the following command line.
- Next, edit /etc/default/grub and add the crashkernel=auto command line option to GRUB_CMDLINE_LINUX .
- Update the GRUB configuration file.
- Optionally, edit the kdump configuration file at /etc/kdump.
How do I get into KDB?
To enter kdb using a breakpoint, first invoke kdb using the Magic SysRq key (see above), then set a breakpoint. Then type ‘go’ to continue execution. When the breakpoint is hit, the debugger shell will appear.
How to do local kernel debugging In WinDbg?
Open WinDbg as Administrator. On the File menu, choose Kernel Debug. In the Kernel Debugging dialog box, open the Local tab. Click OK.
How does the kernel debugger in Linux work?
The kernel to be debugged runs on the target machine. The development machine runs an instance of gdb against the vmlinux file which contains the symbols (not a boot image such as bzImage, zImage, uImage…). In gdb the developer specifies the connection parameters and connects to kgdb.
How does local debugging work in Windows 10?
Debugging Tools for Windows supports local kernel debugging. This is kernel-mode debugging on a single computer. In other words, the debugger runs on the same computer that is being debugged. With local debugging you can examine state, but not break into kernel mode processes that would cause the OS to stop running.
How is KGDB used in the Linux kernel?
Kgdb is intended to be used as a source level debugger for the Linux kernel. It is used along with gdb to debug a Linux kernel. The expectation is that gdb can be used to “break in” to the kernel to inspect memory, variables and look through call stack information similar to the way an application developer would use gdb to debug an application.