Re: [PATCH 01/31] Add hard/soft lockup debugger entry points

From: Thomas Gleixner
Date: Thu Jan 28 2016 - 15:50:00 EST

On Thu, 28 Jan 2016, Jeffrey Merkey wrote:
> On 1/28/16, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> > I'm probably missing something obvious here.
> It's a pain in the butt to grep around through assembly language in a
> function in watchdog.c that has everything declared static with no
> symbols. It's a lot easier just to insert an INT3 in the section of
> code that has the mouse caught in the trap (inside a function that
> triggers the hard lockup) -- after all -- that's what the instruction
> is for.

AFAICT, debuggers can set breakpoints on arbitrary code lines without grepping
through assembly language. If you don't have the debug information available,
then using a debugger is pointless anyway.

This is beyond silly. If we follow your argumentation we need another
gazillion of conditional breakpoints in the kernel. Definitely not.