KGDB stack traces in the kernel.
julian at freebsd.org
Tue Apr 5 20:32:53 UTC 2011
On 4/4/11 6:04 PM, Justin Hibbits wrote:
> On Apr 4, 2011, at 6:57 PM, Julian Elischer wrote:
>> is there anyone here with enough gdb/kgdb source experience to know
>> we would need to put on the stack at fork_exit() to make it stop
>> when it
>> gets there?
>> not only is it annoying but it slows down debugging because kgdb
>> and the ddd
>> front end ask for stacks a LOT. sometimes it actually just hangs as
>> the stack
>> goes into a loop and never ends.
>> I had a quick look but didn't spot how gdb decides it has reached
>> the end of a stack.
> From my experience, it checks for a NULL stack chain pointer. Once
> that reaches NULL, it's the end of the stack.
> - Justin
I'll try adding NULL when we build the intial stack up.
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