On Wed, 12 Dec 2007, J Duff wrote:
> How do I convert the following information in the messages log to a line
> number in the source code?
>
>> BAD TRAP: type=e (#pf Page fault) rp=ffffff0008d0d610 addr=50 occurred in
>> module "module" due to a NULL pointer dereference
>> .
>> .
>> .
>> Dec 11 14:27:31 machine genunix: [ID 655072 kern.notice] ffffff0008d0d800
>> module:method+792 ()
>
> In other words, how can I convert the 792 to a source code line number? I
> know its in the method of module, but the 792 (assembler line number) doesn't
> help me.
There are multiple methods of doing this:
a) modify the makefiles for "module" so that they pass the 'save temporary
files' compiler option. After building, you'll have *.S files laying
around that have the sourcecode in comments. Match from there.
b) compile "module" with full debugging stabs, don't strip them out. You
can then load the object into a source-level capable debugger and
ask the debugger what sourceline that offset is
c) The classical "kernel reverse engineering" approach - disassemble
around the area above, and compare function calls, arithmetic ops,
accesses to global vars etc. with your sourcecode and match from
there.
Generically, in solaris kernel debugging we tend to do c); it takes a bit
to learn but is, for people with a little experience, not generically the
time-consuming part in performing kernel crashdump analysis ...
FrankH.
>
> Duff
>
>
> This message posted from opensolaris.org
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