From fd513b48467cd09ecef4d158faecd8644c701026 Mon Sep 17 00:00:00 2001 From: Nikhil Talpallikar Date: Fri, 1 Aug 2025 10:27:09 -0700 Subject: [PATCH 1/7] Fix null pointer refrence issue with cuda driver API function pointers in case cuInit fails --- .../matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 22 +++++++++---------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index 8adc4d87a..a38afc8d8 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -345,17 +345,6 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) CHECKED_CALL(LOAD_LIBRARY(&CudaDrvLib)); - // cuInit is required; alias it to _cuInit - GET_PROC_EX(cuInit, _cuInit, 1); - CHECKED_CALL(_cuInit(Flags)); - - // available since 2.2. if not present, version 1.0 is assumed - GET_PROC_OPTIONAL(cuDriverGetVersion); - - if (cuDriverGetVersion) { - CHECKED_CALL(cuDriverGetVersion(&driverVer)); - } - // fetch all function pointers GET_PROC(cuDeviceGet); GET_PROC(cuDeviceGetCount); @@ -620,5 +609,16 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) #endif } + // cuInit is required; alias it to _cuInit + GET_PROC_EX(cuInit, _cuInit, 1); + CHECKED_CALL(_cuInit(Flags)); + + // available since 2.2. if not present, version 1.0 is assumed + GET_PROC_OPTIONAL(cuDriverGetVersion); + + if (cuDriverGetVersion) { + CHECKED_CALL(cuDriverGetVersion(&driverVer)); + } + return CUDA_SUCCESS; } From f8aab0053f3ea388472e3e574139ec6fa99322f4 Mon Sep 17 00:00:00 2001 From: Nikhil Talpallikar Date: Tue, 5 Aug 2025 13:46:44 -0700 Subject: [PATCH 2/7] Clean implementation for failure path when cuInit fails --- .../matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 28 +++++++++---------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index a38afc8d8..6f1c97383 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -342,9 +342,21 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) { CUDADRIVER CudaDrvLib; int driverVer = 1000; + CUresult result = CUDA_SUCCESS; - CHECKED_CALL(LOAD_LIBRARY(&CudaDrvLib)); + result = LOAD_LIBRARY(&CudaDrvLib); + // cuInit is required; alias it to _cuInit + GET_PROC_EX(cuInit, _cuInit, 1); + result = _cuInit(Flags); + + // available since 2.2. if not present, version 1.0 is assumed + GET_PROC_OPTIONAL(cuDriverGetVersion); + + if (cuDriverGetVersion) { + result = cuDriverGetVersion(&driverVer); + } + // fetch all function pointers GET_PROC(cuDeviceGet); GET_PROC(cuDeviceGetCount); @@ -608,17 +620,5 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) GET_PROC(cuGraphicsD3D9RegisterResource); #endif } - - // cuInit is required; alias it to _cuInit - GET_PROC_EX(cuInit, _cuInit, 1); - CHECKED_CALL(_cuInit(Flags)); - - // available since 2.2. if not present, version 1.0 is assumed - GET_PROC_OPTIONAL(cuDriverGetVersion); - - if (cuDriverGetVersion) { - CHECKED_CALL(cuDriverGetVersion(&driverVer)); - } - - return CUDA_SUCCESS; + return result; } From 527b29dbd0dac5ff100e8946997aaf3d54c33958 Mon Sep 17 00:00:00 2001 From: Nikhil Talpallikar Date: Tue, 5 Aug 2025 13:49:28 -0700 Subject: [PATCH 3/7] Clean implementation for failure path when cuInit fails. Removed CHECKED_CALL macro which returned prematurely --- .../matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index 6f1c97383..05048e15c 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -324,14 +324,6 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) #error unsupported platform #endif -#define CHECKED_CALL(call) \ - do { \ - CUresult result = (call); \ - if (CUDA_SUCCESS != result) { \ - return result; \ - } \ - } while (0) - #define GET_PROC_REQUIRED(name) GET_PROC_EX(name, name, 1) #define GET_PROC_OPTIONAL(name) GET_PROC_EX(name, name, 0) #define GET_PROC(name) GET_PROC_REQUIRED(name) From d2c52db3e0f08095fc2a01d2bfc1712a6ecb8e2d Mon Sep 17 00:00:00 2001 From: Nikhil Talpallikar Date: Wed, 6 Aug 2025 00:29:22 -0700 Subject: [PATCH 4/7] Fixed the error path to initialize error path function pointers. Exit with error in case of LOADLIBRARY failureas initialize of function pointers in case of LOADLIBRARY failure will fail --- .../matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 68 ++++++++++++++++--- .../matrixMulDynlinkJIT/helper_cuda_drvapi.h | 10 +++ 2 files changed, 70 insertions(+), 8 deletions(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index 05048e15c..b4e8b95e7 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -242,12 +242,23 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) if (*pInstance == NULL) { printf("LoadLibrary \"%s\" failed!\n", __CudaLibName); - return CUDA_ERROR_UNKNOWN; + exit(EXIT_FAILURE); } return CUDA_SUCCESS; } +CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) +{ + *pInstance = GetModuleHandle(__CudaLibName); + if (*pInstance) { + return CUDA_SUCCESS; + } + else { + return CUDA_ERROR_UNKNOWN; + } +} + #define GET_PROC_EX(name, alias, required) \ alias = (t##name *)GetProcAddress(CudaDrvLib, #name); \ if (alias == NULL && required) { \ @@ -269,6 +280,13 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) return CUDA_ERROR_UNKNOWN; \ } +#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ + alias = (t##name *)GetProcAddress(CudaDrvLib, #name); \ + if (alias == NULL && required) { \ + printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ + exit(EXIT_FAILURE); \ + } \ + #elif defined(__unix__) || defined(__QNX__) || defined(__APPLE__) || defined(__MACOSX) #include @@ -293,12 +311,23 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) if (*pInstance == NULL) { printf("dlopen \"%s\" failed!\n", __CudaLibName); - return CUDA_ERROR_UNKNOWN; + exit(EXIT_FAILURE); } return CUDA_SUCCESS; } +CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) +{ + *pInstance = dlopen(__CudaLibName, RTLD_NOLOAD); + if (*pInstance) { + return CUDA_SUCCESS; + } + else { + return CUDA_ERROR_UNKNOWN; + } +} + #define GET_PROC_EX(name, alias, required) \ alias = (t##name *)dlsym(CudaDrvLib, #name); \ if (alias == NULL && required) { \ @@ -320,33 +349,56 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) return CUDA_ERROR_UNKNOWN; \ } +#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ + alias = (t##name *)dlsym(CudaDrvLib, #name); \ + if (alias == NULL && required) { \ + printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ + exit(EXIT_FAILURE); \ + } + #else #error unsupported platform #endif +#define CHECKED_CALL(call) \ + do { \ + CUresult result = (call); \ + if (CUDA_SUCCESS != result) { \ + return result; \ + } \ + } while (0) + #define GET_PROC_REQUIRED(name) GET_PROC_EX(name, name, 1) #define GET_PROC_OPTIONAL(name) GET_PROC_EX(name, name, 0) #define GET_PROC(name) GET_PROC_REQUIRED(name) #define GET_PROC_V2(name) GET_PROC_EX_V2(name, name, 1) #define GET_PROC_V3(name) GET_PROC_EX_V3(name, name, 1) +CUresult INIT_ERROR_FUNCTIONS(void) +{ + CUDADRIVER CudaDrvLib; + CUresult result = CUDA_SUCCESS; + result = GET_DRIVER_HANDLE(&CudaDrvLib); + GET_PROC_ERROR_FUNCTIONS(cuGetErrorString, cuGetErrorString, 1); + return result; +} + CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) { CUDADRIVER CudaDrvLib; int driverVer = 1000; - CUresult result = CUDA_SUCCESS; - - result = LOAD_LIBRARY(&CudaDrvLib); + + CHECKED_CALL(LOAD_LIBRARY(&CudaDrvLib)); // cuInit is required; alias it to _cuInit GET_PROC_EX(cuInit, _cuInit, 1); - result = _cuInit(Flags); + CHECKED_CALL(_cuInit(Flags)); // available since 2.2. if not present, version 1.0 is assumed GET_PROC_OPTIONAL(cuDriverGetVersion); if (cuDriverGetVersion) { - result = cuDriverGetVersion(&driverVer); + CHECKED_CALL(cuDriverGetVersion(&driverVer)); } // fetch all function pointers @@ -612,5 +664,5 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) GET_PROC(cuGraphicsD3D9RegisterResource); #endif } - return result; + return CUDA_SUCCESS; } diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h b/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h index 7c61ff2a4..7f0e6d78d 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h @@ -42,11 +42,21 @@ inline int ftoi(float value) { return (value >= 0 ? static_cast(value + 0.5 #ifndef checkCudaErrors #define checkCudaErrors(err) __checkCudaErrors(err, __FILE__, __LINE__) +extern "C" CUresult INIT_ERROR_FUNCTIONS(void); + // These are the inline versions for all of the SDK helper functions inline void __checkCudaErrors(CUresult err, const char *file, const int line) { if (CUDA_SUCCESS != err) { const char *errorStr = NULL; + + if (!cuGetErrorString) { + CUresult result = INIT_ERROR_FUNCTIONS(); + if (result != CUDA_SUCCESS) { + printf("CUDA driver API failed"); + exit(EXIT_FAILURE); + } + } cuGetErrorString(err, &errorStr); fprintf(stderr, "checkCudaErrors() Driver API error = %04d \"%s\" from file <%s>, " From 6df7127c2371f1193257e0c31551eef4a6aaea94 Mon Sep 17 00:00:00 2001 From: Nikhil Talpallikar Date: Wed, 6 Aug 2025 00:36:35 -0700 Subject: [PATCH 5/7] Fixed dlopen on linux with lazy load flag --- .../0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index b4e8b95e7..0983226f5 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -319,7 +319,7 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) { - *pInstance = dlopen(__CudaLibName, RTLD_NOLOAD); + *pInstance = dlopen(__CudaLibName, RTLD_LAZY); if (*pInstance) { return CUDA_SUCCESS; } From 0861db73ad82d635d790ef512215112f8ac4c2f3 Mon Sep 17 00:00:00 2001 From: ntalpallikar Date: Wed, 6 Aug 2025 10:56:14 -0700 Subject: [PATCH 6/7] fixing indentation --- .../matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 44 +++++++++---------- 1 file changed, 21 insertions(+), 23 deletions(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index 0983226f5..cda089efc 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -280,12 +280,12 @@ CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) return CUDA_ERROR_UNKNOWN; \ } -#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ - alias = (t##name *)GetProcAddress(CudaDrvLib, #name); \ - if (alias == NULL && required) { \ - printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ - exit(EXIT_FAILURE); \ - } \ +#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ + alias = (t##name *)GetProcAddress(CudaDrvLib, #name); \ + if (alias == NULL && required) { \ + printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ + exit(EXIT_FAILURE); \ + } \ #elif defined(__unix__) || defined(__QNX__) || defined(__APPLE__) || defined(__MACOSX) @@ -349,23 +349,23 @@ CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) return CUDA_ERROR_UNKNOWN; \ } -#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ - alias = (t##name *)dlsym(CudaDrvLib, #name); \ - if (alias == NULL && required) { \ - printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ - exit(EXIT_FAILURE); \ +#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ + alias = (t##name *)dlsym(CudaDrvLib, #name); \ + if (alias == NULL && required) { \ + printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ + exit(EXIT_FAILURE); \ } #else #error unsupported platform #endif -#define CHECKED_CALL(call) \ - do { \ - CUresult result = (call); \ - if (CUDA_SUCCESS != result) { \ - return result; \ - } \ +#define CHECKED_CALL(call) \ + do { \ + CUresult result = (call); \ + if (CUDA_SUCCESS != result) { \ + return result; \ + } \ } while (0) #define GET_PROC_REQUIRED(name) GET_PROC_EX(name, name, 1) @@ -377,8 +377,8 @@ CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) CUresult INIT_ERROR_FUNCTIONS(void) { CUDADRIVER CudaDrvLib; - CUresult result = CUDA_SUCCESS; - result = GET_DRIVER_HANDLE(&CudaDrvLib); + CUresult result = CUDA_SUCCESS; + result = GET_DRIVER_HANDLE(&CudaDrvLib); GET_PROC_ERROR_FUNCTIONS(cuGetErrorString, cuGetErrorString, 1); return result; } @@ -386,8 +386,7 @@ CUresult INIT_ERROR_FUNCTIONS(void) CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) { CUDADRIVER CudaDrvLib; - int driverVer = 1000; - + int driverVer = 1000; CHECKED_CALL(LOAD_LIBRARY(&CudaDrvLib)); // cuInit is required; alias it to _cuInit @@ -399,8 +398,7 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) if (cuDriverGetVersion) { CHECKED_CALL(cuDriverGetVersion(&driverVer)); - } - + } // fetch all function pointers GET_PROC(cuDeviceGet); GET_PROC(cuDeviceGetCount); From b4aaab387ec48a07994e3c542be52bdd110467e1 Mon Sep 17 00:00:00 2001 From: Nikhil Talpallikar Date: Fri, 29 Aug 2025 12:37:12 -0700 Subject: [PATCH 7/7] fixed formatting --- .../matrixMulDynlinkJIT/cuda_drvapi_dynlink.c | 50 +++++++++---------- .../matrixMulDynlinkJIT/helper_cuda_drvapi.h | 2 +- 2 files changed, 26 insertions(+), 26 deletions(-) diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c index 0983226f5..6a50a7498 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/cuda_drvapi_dynlink.c @@ -248,8 +248,8 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) return CUDA_SUCCESS; } -CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) -{ +CUresult GET_DRIVER_HANDLE(CUDADRIVER *pInstance) +{ *pInstance = GetModuleHandle(__CudaLibName); if (*pInstance) { return CUDA_SUCCESS; @@ -280,12 +280,12 @@ CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) return CUDA_ERROR_UNKNOWN; \ } -#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ - alias = (t##name *)GetProcAddress(CudaDrvLib, #name); \ - if (alias == NULL && required) { \ - printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ - exit(EXIT_FAILURE); \ - } \ +#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ + alias = (t##name *)GetProcAddress(CudaDrvLib, #name); \ + if (alias == NULL && required) { \ + printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ + exit(EXIT_FAILURE); \ + } #elif defined(__unix__) || defined(__QNX__) || defined(__APPLE__) || defined(__MACOSX) @@ -317,8 +317,8 @@ static CUresult LOAD_LIBRARY(CUDADRIVER *pInstance) return CUDA_SUCCESS; } -CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) -{ +CUresult GET_DRIVER_HANDLE(CUDADRIVER *pInstance) +{ *pInstance = dlopen(__CudaLibName, RTLD_LAZY); if (*pInstance) { return CUDA_SUCCESS; @@ -349,23 +349,23 @@ CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) return CUDA_ERROR_UNKNOWN; \ } -#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ - alias = (t##name *)dlsym(CudaDrvLib, #name); \ - if (alias == NULL && required) { \ - printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ - exit(EXIT_FAILURE); \ +#define GET_PROC_ERROR_FUNCTIONS(name, alias, required) \ + alias = (t##name *)dlsym(CudaDrvLib, #name); \ + if (alias == NULL && required) { \ + printf("Failed to find error function \"%s\" in %s\n", #name, __CudaLibName); \ + exit(EXIT_FAILURE); \ } #else #error unsupported platform #endif -#define CHECKED_CALL(call) \ - do { \ - CUresult result = (call); \ - if (CUDA_SUCCESS != result) { \ - return result; \ - } \ +#define CHECKED_CALL(call) \ + do { \ + CUresult result = (call); \ + if (CUDA_SUCCESS != result) { \ + return result; \ + } \ } while (0) #define GET_PROC_REQUIRED(name) GET_PROC_EX(name, name, 1) @@ -377,8 +377,8 @@ CUresult GET_DRIVER_HANDLE(CUDADRIVER* pInstance) CUresult INIT_ERROR_FUNCTIONS(void) { CUDADRIVER CudaDrvLib; - CUresult result = CUDA_SUCCESS; - result = GET_DRIVER_HANDLE(&CudaDrvLib); + CUresult result = CUDA_SUCCESS; + result = GET_DRIVER_HANDLE(&CudaDrvLib); GET_PROC_ERROR_FUNCTIONS(cuGetErrorString, cuGetErrorString, 1); return result; } @@ -387,7 +387,7 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) { CUDADRIVER CudaDrvLib; int driverVer = 1000; - + CHECKED_CALL(LOAD_LIBRARY(&CudaDrvLib)); // cuInit is required; alias it to _cuInit @@ -400,7 +400,7 @@ CUresult CUDAAPI cuInit(unsigned int Flags, int cudaVersion) if (cuDriverGetVersion) { CHECKED_CALL(cuDriverGetVersion(&driverVer)); } - + // fetch all function pointers GET_PROC(cuDeviceGet); GET_PROC(cuDeviceGetCount); diff --git a/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h b/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h index 7f0e6d78d..befd53bb2 100644 --- a/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h +++ b/Samples/0_Introduction/matrixMulDynlinkJIT/helper_cuda_drvapi.h @@ -49,7 +49,7 @@ inline void __checkCudaErrors(CUresult err, const char *file, const int line) { if (CUDA_SUCCESS != err) { const char *errorStr = NULL; - + if (!cuGetErrorString) { CUresult result = INIT_ERROR_FUNCTIONS(); if (result != CUDA_SUCCESS) {