[llvm-dev] LLJIT vs. thread-local storage

[Praveen Velliengiri via llvm-dev]

Can you able to share c++ code and your JIT setup?

On Fri, 20 Dec 2019 at 23:48, Geoff Levner <glevner at gmail.com> wrote:

> Yes, I confirm.
>
> Le ven. 20 déc. 2019 à 19:12, Praveen Velliengiri <
> praveenvelliengiri at gmail.com> a écrit :
>
>> Hi,
>> Orc v2 is different from the internal structure then Orc v1 not just in
>> API level.
>> TLS support is not in ORC for a long time at least I'm aware of , Could
>> you please confirm that ORC v1 actually compiles and run the code with
>> Thread locals?
>>
>> On Fri, 20 Dec 2019 at 23:36, Geoff Levner <glevner at gmail.com> wrote:
>>
>>> And yet the same C++ code using thread-local variables works fine (or
>>> seems to) when compiled with Orc v1. Does the change to the Orc API really
>>> make thread-local storage more difficult?
>>>
>>> On Fri, Dec 20, 2019 at 3:52 PM Praveen Velliengiri <
>>> praveenvelliengiri at gmail.com> wrote:
>>>
>>>> Oh, I think Linux don't have support for TLS.
>>>>
>>>> On Fri, 20 Dec 2019 at 20:19, Geoff Levner <glevner at gmail.com> wrote:
>>>>
>>>>> Argh. Thanks for the info. We're on Linux.
>>>>>
>>>>> On Fri, Dec 20, 2019 at 3:46 PM Praveen Velliengiri <
>>>>> praveenvelliengiri at gmail.com> wrote:
>>>>>
>>>>>> Hi Geoff,
>>>>>> Gathering from past, I remember that the ORCv2 doesn't support thread
>>>>>> local variable but not sure what is the current status now. What platform
>>>>>> you are on?
>>>>>> CC'ed (Lang hames) he knows exactly what is the status.
>>>>>>
>>>>>> On Fri, 20 Dec 2019 at 18:39, Geoff Levner via llvm-dev <
>>>>>> llvm-dev at lists.llvm.org> wrote:
>>>>>>
>>>>>>> I am in the process of porting our ORC code to ORC v2 and LLJIT. Now
>>>>>>> that I have worked around a problem getting global constructors to be
>>>>>>> called, everything seems to work unless a module declares a static
>>>>>>> thread-local variable. In that case I get a "JIT session error" saying that
>>>>>>> the symbol __emutls_v.xyz was not found (substitute the mangled
>>>>>>> variable name for "xyz").
>>>>>>>
>>>>>>> Does that mean anything to anybody out there?
>>>>>>>
>>>>>>> (I don't know if it's relevant, but we are using LLVM 8, and we are
>>>>>>> using Clang to compile C++ modules that are all put into a single JITDylib.)
>>>>>>>
>>>>>>> Geoff
>>>>>>> _______________________________________________
>>>>>>> LLVM Developers mailing list
>>>>>>> llvm-dev at lists.llvm.org
>>>>>>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>>>>>
>>>>>>
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