Ntch, i’m trying to make a simple program but with a simple example it works 
I’m currently have the cuda code into a shared library. The .cu file is compiled with -g -G --compiler-options = ‘-fPIC’, the rest of .cpp files with g++, then all of them are linked with nvcc -g -G --compiler-options = ‘-fPIC’ -shared.
For example in this piece of code:
[codebox]global void gpu_kernel(int array_width,int array_height )
{
int block_offset_cols = __mul24(blockIdx.x, blockDim.x);
int block_offset_rows = __mul24(blockIdx.y, blockDim.y);
int array_start = block_offset_rows * array_width + block_offset_cols;
int me = array_start + __mul24(array_width, threadIdx.y) + threadIdx.x;
}[/codebox]
[codebox]
Breakpoint 2, gpu_kernel () at gpu_kernel.cu:246
246 int block_offset_cols = __mul24(blockIdx.x, blockDim.x);
Current language: auto; currently c++
… a few nexts to achieve the bottom …
(cuda-gdb) print block_offset_cols
$1 = 0
(cuda-gdb) print me
$2 = 0
(cuda-gdb) print array_start
$3 = 0
(cuda-gdb) print array_width
$4 = 2
(cuda-gdb) print array_height
$5 = 2
(cuda-gdb) print blockIdx
$6 = {x = 0, y = 0}
(cuda-gdb) print threadIdx
$7 = {x = 0, y = 0, z = 0}
(cuda-gdb)
[/codebox]
All goes well, but, when i’m try to put a breakpoint in the device func that is in the same library (i try to put it when the shared library is already loaded)
[codebox]device bool device_kernel(float *pmin, float *pmax)
{
float vt0[3],vt1[3];
float t0,t1;
return true;
}[/codebox]
codebox break device_kernel
Function “device_kernel” not defined.
Make breakpoint pending on future shared library load? (y or [n]) n[/codebox]
Ntch, the library is already loaded! (the global and device funcs are in the same library)
With next, next, next, next… i arrive to device_kernel… time to see vars!!
codebox print vt0
No symbol “vt0” in current context.
(cuda-gdb) print vt1
No symbol “vt1” in current context.
(cuda-gdb) print t0
No symbol “t0” in current context.
(cuda-gdb) print t1
No symbol “t1” in current context.
[/codebox]
But the params are visible!
codebox print pmin
$1 = (float * const @global) 0x16157b50
(cuda-gdb) print *pmin
$2 = -0.104707092
(cuda-gdb) print pmax[0]
$3 = 0.0710269064
(cuda-gdb) print pmax[1]
$4 = 0.197344124[/codebox]
Any ideas?
Thanks 
Edit: Another thing, for developers. When you compile without -G option, run cuda-gdb, and try to put a breakpoint into a file that is part of a library but it isn’t in your current folder, you get a beautiful Segmentation fault 
Edit2: More info, i’m using centos linux 64 bits, g++ 4.1.2 20080704 (Red Hat 4.1.2-44), Tesla C1060
