Re: [Qemu-devel] [PATCH] tcg: Use the GDB JIT debugging interface.

[Daniel Jacobowitz]

On Fri, Sep 30, 2011 at 10:36 AM, Richard Henderson <address@hidden> wrote:
> On 09/30/2011 12:12 AM, Jan Kiszka wrote:
>>> Breakpoint 1, __ldb_mmu (addr=1001716, mmu_idx=0)
>>>     at /home/rth/work/qemu/qemu/softmmu_template.h:86
>>> 86   {
>>> (gdb) where
>>> #0  __ldb_mmu (addr=1001716, mmu_idx=0)
>>>     at /home/rth/work/qemu/qemu/softmmu_template.h:86
>>> #1  0x0000000040000afc in ?? ()
> ...
>> Would it be possible to tag translated code as well? At TB or maybe even
>> input instruction level? Only in debugging mode of course.
>
> I don't know.  A couple of points on that:
>
> (1) I was rather expecting frame 1 above to be marked "code_gen_buffer"
>    rather than "??".  I *did* install that symbol in the generated
>    ELF image as a function covering the entire buffer.  So I'm not
>    quite sure why GDB didn't use it.

Totally wild guess: associated with the wrong section?  I don't
remember what we do w.r.t. ABS in shared libraries, but for non-ABS we
do validate what section we think things are in.  And I'm not sure if
we load section info in the JIT loader, either.

-- 
Thanks,
Daniel