On Fri, 25 May 2001 01:33:03 +0200,
Andi Kleen <ak@suse.de> wrote:
>On Thu, May 24, 2001 at 05:08:40PM -0600, Andreas Dilger wrote:
>> I'm curious about this stack checker. Does it check for a single
>> stack allocation >= 1024 bytes, or does it also check for several
>> individual, smaller allocations which total >= 1024 bytes inside
>> a single function? That would be equally useful.
>
>At one time someone had a script to grep objdump -S vmlinux for the
>stack allocations generated by gcc and check them.
ftp://ftp.ocs.com.au/pub/kernel.stack.gz. ix86 specific, probably gcc
specific and it only picks up code that you compile. The Stanford
checker is much better.
>> On a side note, does anyone know if the kernel does checking if the
>> stack overflowed at any time?
>
>You normally get a silent hang or worse a stack fault exception
>(which linux/x86 without kdb cannot recover from) which gives you instant
>reboot.
You cannot recover from a kernel stack overflow even with kdb. The
exception handler and kdb use the stack that just overflowed.
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This archive was generated by hypermail 2b29 : Thu May 31 2001 - 21:00:21 EST