[LLVMdev] Minimizing -gmlt

[David Blaikie]

On Wed, Aug 27, 2014 at 5:04 PM, Chandler Carruth <chandlerc at google.com>
wrote:

>
> On Wed, Aug 27, 2014 at 5:03 PM, David Blaikie <dblaikie at gmail.com> wrote:
>
>> On Wed, Aug 27, 2014 at 4:53 PM, Chandler Carruth <chandlerc at google.com>
>> wrote:
>>
>>>
>>> On Wed, Aug 27, 2014 at 4:40 PM, David Blaikie <dblaikie at gmail.com>
>>> wrote:
>>>
>>>> DW_AT_frame_base (the location of the frame pointer - is that needed
>>>> for symbolication?)
>>>
>>>
>>> I think this is used by libunwind style stack unwinders in conjunction
>>> with -fomit-frame-pointer
>>>
>>
>> Sounds plausible - any way I might test such a thing?
>>
>
> use gdb or pprof to get a backtrace from abinary build without frame
> pointers?
>

gdb didn't seem to exhibit any difference in behavior when I removed
DW_AT_frame_base while compiling my test program (after adding a null
dereference to the last call).

We'll see, but I may end up removing this until we stumble across a use
case for it.

- David
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