[PATCH v2] Fix logic in exec_file_locate_attach

[Pedro Alves]

On 02/23/2016 12:04 AM, Luis Machado wrote:
> On 02/22/2016 08:00 PM, Pedro Alves wrote:
>> On 02/22/2016 10:49 PM, Luis Machado wrote:
>>> On 02/22/2016 07:00 PM, Luis Machado wrote:
>>
>>>> My idea was to guard both exec_file_attach and symbol_file_add_main. We
>>>> can't have anything in that function throwing an error that won't be
>>>> caught, otherwise the above connection attempt will fail.
>>>
>>> For the record, you patch does fix the case of native GDB trying to
>>> attach to a process without pre-loading a symbol file. We get a
>>> multi-frame backtrace as expected.
>>>
>>> It is the gdb/gdbserver case that still seems to be broken.
>>>
>>
>> Native is also broken as well for unexpectedly aborting the attach
>> sequence midway.  While "bt" doesn't show it, "detach" does trip on it:
>>

> Sounds like we're looking into a try/catch block around such functions then?
> 

Yes, I think so.  Probably best to make it two separate try/catches,
in case the file can't be loaded as executable but succeeds as
symbol file, for some reason.

Thanks,
Pedro Alves