c - cudaMalloc runtime error -


i have problem executing following code on host , not sure going wrong. understanding need allocate enough memory store contents of textdata textlength in size on device, malloc sizeof(char) * textlength should give me enough space, use cudamemcpy copy of values textdata allocated space on device. exception reads "access violation reading location 0x000000000501f80400" memory address of cutextarray on device.

texture<char, cudatexturetype1d, cudareadmodeelementtype> textdataref;          int textlength = 10000000         cudaarray *cutextarray;         checkcudaerrors (cudamalloc(&cutextarray, sizeof(char)*textlength));         checkcudaerrors(cudamemcpy(cutextarray, textdata, sizeof(char)*textlength, cudamemcpyhosttodevice));         checkcudaerrors(cudabindtexturetoarray(textdataref, cutextarray, textdataref.channeldesc));

i cannot use cudamallocarray data big buffer - maximum of 8192 bytes

exception here seems crash @ binding texture array snippet of code inside cuda_runtime.h:

enter image description here

well turns out can stay away entire array nonsense using standard char pointer reference , different binding call working. extremely simple stuff, bit odd wasn't answerable.

//allocate memory     checkcudaerrors( cudamalloc(&d_textdata, sizeof(char) * textlength) );  //copy host device     checkcudaerrors( cudamemcpy(d_textdata, textdata, sizeof(char)* textlength, cudamemcpyhosttodevice)); //bind reference block of memory     checkcudaerrors ( cudabindtexture(null,&textextref,d_textdata,&textextref.channeldesc, sizeof(char) * textlength ) );

lookup values using

tex1dfetch(textextref,k+index)

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