[llvm-dev] ORC jit calling a function that uses the stl

Mon Apr 8 12:10:50 PDT 2019

Hi,

I have been trying to use the new ORC jit to execute a c function using c++
that was compiled to llvm bytecode (clang++.exe -c -g -emit-llvm -std=c++2a
-o CxxJit.bc CxxJit.cpp).
I guess the first thing I need to say is that I am on windows, this could
explain why I have those issues.

The file to jit is this:
#include "CxxJit.h"
#include <stdio.h>
#include <vector>

extern "C"
{
  void doWork()
  {
    std::vector<int32_t> vec(10000);
    printf("doWork() = %d \n", 12);
  }
}

Now If I only have the printf everything works but when I try to create a
std::vector It fails to lookup the symbol. In the error stream I have one
symbol not found and a bunch of symbol that failed to materialize.
JIT session error: Symbols not found: { ??3 at YAXPEAX_K@Z }
Failed to materialize symbols: { ??0?$vector at HV?$allocator at H@std@@@std@
@QEAA at _KAEBV?$allocator at H@1@@Z, doWork, ?_Myfirst@?$vector at HV?$allocator at H
@std@@@std@@AEAAAEAPEAHXZ, ??$forward at AEBV?$allocator at H@std@@@std@
@YAAEBV?$allocator at H@0 at AEBV10@@Z, ?_Get_second@?$_Compressed_pair at V
?$allocator at H@std@@V?$_Vector_val at U?$_Simple_types at H@std@@@2@$00 at std
@@QEAAAEAV?$_Vector_val at U?$_Simple_types at H@std@@@2 at XZ, ?_Tidy@?$vector at HV
?$allocator at H@std@@@std@@AEAAXXZ, ?_Orphan_all at _Container_base0@std@@QEAAXXZ,
??1?$vector at HV?$allocator at H@std@@@std@@QEAA at XZ, ??$?0AEBV?$allocator at H@std@
@$$V@?$_Compressed_pair at V?$allocator at H@std@@V?$_Vector_val at U
?$_Simple_types at H@std@@@2@$00 at std@@QEAA at U_One_then_variadic_args_t@1 at AEBV
?$allocator at H@1@@Z, ?_Release at _Fake_proxy_ptr_impl@std@@QEAAXXZ,
??0?$allocator at H@std@@QEAA at XZ, ?_Getal@?$vector at HV?$allocator at H@std@@@std@
@AEAAAEAV?$allocator at H@2 at XZ, ??$_Allocate@$0BA at U_Default_allocate_traits
@std@@$0A@@std@@YAPEAX_K at Z, ?_Allocate at _Default_allocate_traits@std
@@SAPEAX_K at Z, ??_C at _0BD@OLBABOEK at vector?$DMT?$DO?5too?5long?$AA@,
??1?$_Tidy_guard at V?$vector at HV?$allocator at H@std@@@std@@@std@@QEAA at XZ,
?_Destroy@?$vector at HV?$allocator at H@std@@@std@@AEAAXPEAH0 at Z, ?_Getal@
?$vector at HV?$allocator at H@std@@@std@@AEBAAEBV?$allocator at H@2 at XZ, main,
??$_Construct_n_copies_of_ty at U_Value_init_tag@std@@@?$vector at HV?$allocator at H
@std@@@std@@AEAAX_KAEBU_Value_init_tag at 1@@Z, ??0_Fake_proxy_ptr_impl at std
@@QEAA at AEBU_Fake_allocator@1 at AEBU_Container_base0@1@@Z, ?_Buy_nonzero@
?$vector at HV?$allocator at H@std@@@std@@AEAAX_K at Z, ?_Orphan_all@?$vector at HV
?$allocator at H@std@@@std@@AEAAXXZ,
??$_Allocate_manually_vector_aligned at U_Default_allocate_traits@std@@@std@
@YAPEAX_K at Z, ?_Mylast@?$vector at HV?$allocator at H@std@@@std@@AEAAAEAPEAHXZ,
?max_size@?$vector at HV?$allocator at H@std@@@std@@QEBA_KXZ, ??$_Zero_range at PEAH
@std@@YAPEAHQEAH0 at Z, ?max_size@?$_Default_allocator_traits at V?$allocator at H
@std@@@std@@SA_KAEBV?$allocator at H@2@@Z, ?_Adjust_manually_vector_aligned at std
@@YAXAEAPEAXAEA_K at Z, ?deallocate@?$allocator at H@std@@QEAAXQEAH_K at Z, ?max@
?$numeric_limits at _J@std@@SA_JXZ, ??$_Uninitialized_value_construct_n at PEAH_KV
?$allocator at H@std@@@std@@YAPEAHPEAH_KAEAV?$allocator at H@0@@Z,
??$_Destroy_range at V?$allocator at H@std@@@std@@YAXPEAH0AEAV?$allocator at H@0@@Z,
?_Get_data@?$vector at HV?$allocator at H@std@@@std@@AEAAAEAV?$_Vector_val at U
?$_Simple_types at H@std@@@2 at XZ, ?_Get_first@?$_Compressed_pair at V?$allocator at H
@std@@V?$_Vector_val at U?$_Simple_types at H@std@@@2@$00 at std
@@QEAAAEAV?$allocator at H@2 at XZ, ??$_Min_value at _K@std@@YAAEB_KAEB_K0 at Z,
??$_Get_size_of_n@$03 at std@@YA_K_K at Z, ?_Ufill@?$vector at HV?$allocator at H@std@
@@std@@AEAAPEAHPEAH_KU_Value_init_tag at 2@@Z,
??$_Uninitialized_value_construct_n1 at PEAH_KV?$allocator at H@std@@@std@
@YAPEAHPEAH_KAEAV?$allocator at H@0 at U?$integral_constant at _N$00 at 0@@Z,
??0?$_Vector_val at U?$_Simple_types at H@std@@@std@@QEAA at XZ, ?_Buy_raw@
?$vector at HV?$allocator at H@std@@@std@@AEAAX_K at Z, ?allocate@?$allocator at H@std@
@QEAAPEAH_K at Z, ?_Get_first@?$_Compressed_pair at V?$allocator at H@std@
@V?$_Vector_val at U?$_Simple_types at H@std@@@2@$00 at std@@QEBAAEBV?$allocator at H
@2 at XZ, ??$_Deallocate@$0BA@$0A@@std@@YAXPEAX_K at Z, ?_Xlength@?$vector at HV
?$allocator at H@std@@@std@@CAXXZ }

You can see the code that I am using here:
https://gist.github.com/monamimani/1d8c5287eeaf83d5a6f619699d0c52c4

There is a bunch of reason I can imagine why this would happen:
- The symbol are not there, I recently discover
this llvm::sys::DynamicLibrary::LoadLibraryPermanently(nullptr); but it
doesn't change anything.,
- I am using this helper class
http://llvm.org/doxygen/classllvm_1_1orc_1_1LLJIT.html, maybe the setup is
not complet. I tried to compare with the example
https://llvm.org/docs/tutorial/BuildingAJIT1.html, maybe I missed something.
- The other thing I am considering is that
llvm::orc::RTDyldObjectLinkingLayer is not working on windows and I would
need to use llvm::orc::LegacyRTDyldObjectLinkingLayer ( because of the bool
ExportedSymbolsOnly parameter in the findSymbol function.

Does anybody have a hint about what I might try to fix this?

Thanks a lot.
Emmanuel
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