Re: JIT debugging (Attach and speed)

Pedro Alves
2016-03-22T16:15:26Z

On 03/22/2016 03:46 PM, Pedro Alves wrote:

>> 2. JIT code registration on attach is broken.
>>
>> When I set a breakpoint on `jit_inferior_init`[3] (i.e. lauching
>> gdb with `gdb --args gdb -p <pid_to_debug>`) which IIUC is what
>> responsible for walking the jit object list at init time, it seems
>> that the function is never called.
>>
>> (I haven't seen a bug report about this yet)
>
> Do you know whether this happens with 7.11 and master, and if so,
> would it be possible for you to git bisect the culprit?

Currently, jit_inferior_created_hook -> jit_inferior_init is only
called when the inferior execs...

Grepping around, I think that might have been
the fix for PR gdb/13431 (03bef283c2d3):
https://sourceware.org/ml/gdb-patches/2012-02/msg00023.html
which removed the inferior_created (jit_inferior_created_observer).

Adding an inferior_created observer back likely fixes the issue.

Thanks,
Pedro Alves