llvm dev - Feb 2020 - segfault with HowToUseJIT

Hi!

I've started looking porting our application which uses LLVM JIT to 
using LLVM 9 (9.0.1).

To begin, I tried running the HowToUseJIT.cpp (example directory) 
program and it fails with a segfault:


./HowToUseJIT
We just constructed this LLVM module:

; ModuleID = 'test'
source_filename = "test"

Running foo: Segmentation fault (core dumped)



Running it through GDB:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000404912 in main () at HowToUseJIT.cc:131
131      GenericValue gv = EE->runFunction(FooF, noargs);
(gdb) bt
#0  0x0000000000404912 in main () at HowToUseJIT.cc:131


It seems it fails when the JIT-compiled function gets called.



I freshly downloaded LLVM 9.0.1 and build it with the backend "X86".
The
machine I am running this on is a 'Intel(R) Core(TM) i7-6820HQ CPU @ 
2.70GHz'


Any ideas?


Frank

+Lang, Veteran of the JIT Wars (/owner of LLVM JIT infrastructure) - might
have some ideas here.

On Mon, Feb 24, 2020 at 1:34 PM Frank Winter via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi!
>
> I've started looking porting our application which uses LLVM JIT to
> using LLVM 9 (9.0.1).
>
> To begin, I tried running the HowToUseJIT.cpp (example directory)
> program and it fails with a segfault:
>
>
> ./HowToUseJIT
> We just constructed this LLVM module:
>
> ; ModuleID = 'test'
> source_filename = "test"
>
> Running foo: Segmentation fault (core dumped)
>
>
>
> Running it through GDB:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000404912 in main () at HowToUseJIT.cc:131
> 131      GenericValue gv = EE->runFunction(FooF, noargs);
> (gdb) bt
> #0  0x0000000000404912 in main () at HowToUseJIT.cc:131
>
>
> It seems it fails when the JIT-compiled function gets called.
>
>
>
> I freshly downloaded LLVM 9.0.1 and build it with the backend
"X86". The
> machine I am running this on is a 'Intel(R) Core(TM) i7-6820HQ CPU @
> 2.70GHz'
>
>
> Any ideas?
>
>
> Frank
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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Hi Frank,
Actually, IR generated in the code is incomplete. IR module must contain
two function definitions but when printing the IRModule you get only
;ModuleID = 'test'
source_filename = "test"


On Tue, 25 Feb 2020 at 03:35, David Blaikie via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> +Lang, Veteran of the JIT Wars (/owner of LLVM JIT infrastructure) - might
> have some ideas here.
>
> On Mon, Feb 24, 2020 at 1:34 PM Frank Winter via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi!
>>
>> I've started looking porting our application which uses LLVM JIT to
>> using LLVM 9 (9.0.1).
>>
>> To begin, I tried running the HowToUseJIT.cpp (example directory)
>> program and it fails with a segfault:
>>
>>
>> ./HowToUseJIT
>> We just constructed this LLVM module:
>>
>> ; ModuleID = 'test'
>> source_filename = "test"
>>
>> Running foo: Segmentation fault (core dumped)
>>
>>
>>
>> Running it through GDB:
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x0000000000404912 in main () at HowToUseJIT.cc:131
>> 131      GenericValue gv = EE->runFunction(FooF, noargs);
>> (gdb) bt
>> #0  0x0000000000404912 in main () at HowToUseJIT.cc:131
>>
>>
>> It seems it fails when the JIT-compiled function gets called.
>>
>>
>>
>> I freshly downloaded LLVM 9.0.1 and build it with the backend
"X86". The
>> machine I am running this on is a 'Intel(R) Core(TM) i7-6820HQ CPU
@
>> 2.70GHz'
>>
>>
>> Any ideas?
>>
>>
>> Frank
>>
>>
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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