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

[Geoff Levner via llvm-dev]

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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