[llvm-bugs] [Bug 34360] New: Linking error when calling operator new in CUDA kernel
via llvm-bugs
llvm-bugs at lists.llvm.org
Tue Aug 29 06:05:32 PDT 2017
https://bugs.llvm.org/show_bug.cgi?id=34360
Bug ID: 34360
Summary: Linking error when calling operator new in CUDA kernel
Product: clang
Version: 4.0
Hardware: PC
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: CUDA
Assignee: unassignedclangbugs at nondot.org
Reporter: ralph_kube at gmx.net
CC: llvm-bugs at lists.llvm.org
clang 4.0 fails linking programs which call ::operator new() from CUDA kernels.
This is described in the CUDA documentation here:
http://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#memory-allocation-and-lifetime
Below is a minimal program that reproduces the error as well as the error
message and the version information.
#include <iostream>
#include <cuda_runtime_api.h>
class myclass
{
public:
__host__ __device__ myclass(const double _data) : data(_data) {}
__host__ __device__ ~myclass()
{
printf("Deleting myclass\n");
}
__host__ __device__ double get_data() const {return(data);}
private:
const double data;
};
__global__
void init_myclass(myclass** mycs_ptr)
{
(*mycs_ptr) = new myclass(14.0);
}
__global__
void access_myclass(myclass** mycs_ptr)
{
printf("I am using data with value = %f\n", (*mycs_ptr) -> get_data());
}
__global__
void delete_myclass(myclass** mycs_ptr)
{
delete (*mycs_ptr);
}
int main(void)
{
myclass** myclass_ptr{nullptr};
init_myclass<<<1, 1>>>(myclass_ptr);
access_myclass<<<1, 1>>>(myclass_ptr);
delete_myclass<<<1, 1>>>(myclass_ptr);
return(0);
}
[1] % clang++ -std=c++14 -o test_new_device test_new_device.cu
-L/Developer/NVIDIA/CUDA-8.0/lib -lcudart
ptxas fatal : Unresolved extern function '_Znwm'
clang-4.0: error: ptxas command failed with exit code 255 (use -v to see
invocation)
I’m on osx 10.12.5, using
% clang++ --version
clang version 4.0.0 (tags/RELEASE_400/final 297808)
Target: x86_64-apple-darwin16.6.0
Thread model: posix
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