[cfe-dev] Effectively Debugging Clang

[Csaba Raduly]

Hi,

What compiler do you use to build clang? Older versions of GDB (7.2,
7.4) had problems understanding objects (or the debug info) created by
GCC 4.8 and higher (typical symptom: none of the local variables were
visible to the debugger).

GDB 7.7 (on Linux) seems to be better, but I switched to the latest
gdb 7.8 anyway, built from sources.

Csaba

On Thu, Oct 2, 2014 at 7:10 AM, Amila Jayasekara
<thejaka.amila at gmail.com> wrote:
> Hi David,
>
> I am using 7.7.1.
>
> Thanks
> -Thejaka
>
> On Wed, Oct 1, 2014 at 11:13 AM, David Blaikie <dblaikie at gmail.com> wrote:
>>
>>
>>
>> On Tue, Sep 30, 2014 at 10:34 AM, Amila Jayasekara
>> <thejaka.amila at gmail.com> wrote:
>>>
>>> Hello,
>>>
>>> I am having a more general question related to debugging clang.
>>>
>>> I start gdb (in MacOS) as follows;
>>>
>>> >ggdb clang++
>>> ....
>>> ....
>>> (ggdb) run -cc1 -std=c++11 -stdlib=libc++
>>> -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/c++/v1
>>> test1.cpp
>>>
>>> In most of the time during debugging session I am unable to evaluate and
>>> print values of a certain variable. Sometimes my debugger freezes for long
>>> time, sometime i get a segmentation faults.
>>>
>>> For example if I execute following on a  QualType variable I get a
>>> segmentation fault.
>>>
>>> (gdb) p FnRetType.getAsString()
>>> line 1: 39759 Segmentation fault: 11  ggdb
>>> /Users/thejaka/development/crest/pxc/llvm/350/Debug+Asserts/bin/clang++
>>>
>>> So my question is, what are the techniques you use to effectively debug
>>> clang ? and how can I overcome crashes like above ?
>>
>>
>>  I debug Clang and LLVM on Linux using gdb all the time. Which version of
>> gdb are you using?
>>
>>>
>>>
>>> Your feedback is greatly appreciated.
>>>
>>> Thank you
>>> Regards
>>> Thejaka Amila
>>>
>>>
>>>
>>> _______________________________________________
>>> cfe-dev mailing list
>>> cfe-dev at cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>
>>
>
>
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