Difference between revisions of "Exception Analysis tools"
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**** see [http://events.linuxfoundation.org/slides/2011/linuxcon-japan/lcj2011_wang.pdf Kernel crash logging and core dump] - Kong Wang, Redhat, at LinuxCon Japan 2011 | **** see [http://events.linuxfoundation.org/slides/2011/linuxcon-japan/lcj2011_wang.pdf Kernel crash logging and core dump] - Kong Wang, Redhat, at LinuxCon Japan 2011 | ||
* parsing information | * parsing information | ||
| − | ** oops analysis: http://madwifi-project.org/wiki/DevDocs/KernelOops | + | ** There are many tutorials on analyzing a kernel Oops. One of the best is the following: |
| + | *** oops analysis: http://madwifi-project.org/wiki/DevDocs/KernelOops | ||
| + | ** [http://manpages.unixforum.co.uk/man-pages/linux/opensuse-10.2/8/ksymoops-man-page.html ksymoops] is used to convert addresses in an oops document to symbols | ||
** [[GDB]] is used with coredump files | ** [[GDB]] is used with coredump files | ||
*** see [[GDB#Core_dump]] | *** see [[GDB#Core_dump]] | ||
| Line 37: | Line 39: | ||
* debuggers: | * debuggers: | ||
** gdb | ** gdb | ||
| + | ** kdb (local interactive kernel debugging) | ||
| + | |||
| + | * See http://kernel.org/pub/linux/kernel/people/jwessel/dbg_webinar/State_Of_kernel_debugging_LinuxCon2010.pdf | ||
| + | ** Jason Wessel description of kernel debugging status at LinuxCon 2010. | ||
| + | *** Notes: | ||
| + | **** kgdboe = kgdb over ethernet - is unreliable and not going to be mainlined in current form | ||
| + | **** kgdboc = kgdb over console? - slow but preferred | ||
| + | **** kdb over EHCI = USB dongle for high-speed | ||
| + | |||
| + | [[Category:Development Tools]] | ||
Latest revision as of 20:04, 8 December 2011
There are lots of tools for Linux for analyzing and debugging exceptions in both the kernel and user-space programs.
Outline
- capturing information
- information emitted to kernel buffer
- serial console, net console, (other consoles - USB?)
- Oops savers: mtdoops, pstore, ramoops, netoops
- process exceptions
- android tombstones (exception summaries)
- Sony exception monitor log
- coredumps (full process image)
- kernel image
- kdump
- see Kernel crash logging and core dump - Kong Wang, Redhat, at LinuxCon Japan 2011
- kdump
- information emitted to kernel buffer
- parsing information
- There are many tutorials on analyzing a kernel Oops. One of the best is the following:
- oops analysis: http://madwifi-project.org/wiki/DevDocs/KernelOops
- ksymoops is used to convert addresses in an oops document to symbols
- GDB is used with coredump files
- see GDB#Core_dump
- For Sony's EM log: emlogconv, em-log-process
- debuggerd analysis
- There are many tutorials on analyzing a kernel Oops. One of the best is the following:
- interactive analysis
- Sony exception monitor
Debugging the kernel
(this section is only here temporarily)
- target agents:
- connectors:
- adb
- what do WR, MV and others use to set up or connect the debugger to the process?
- debug agents
- gdbserver
- kgdb
- connectors:
- host agents:
- adb server
- debuggers:
- gdb
- kdb (local interactive kernel debugging)
- See http://kernel.org/pub/linux/kernel/people/jwessel/dbg_webinar/State_Of_kernel_debugging_LinuxCon2010.pdf
- Jason Wessel description of kernel debugging status at LinuxCon 2010.
- Notes:
- kgdboe = kgdb over ethernet - is unreliable and not going to be mainlined in current form
- kgdboc = kgdb over console? - slow but preferred
- kdb over EHCI = USB dongle for high-speed
- Notes:
- Jason Wessel description of kernel debugging status at LinuxCon 2010.
