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Registered: ‎04-17-2012

Displaying __global float*a during debugging doesn't work



I am using a the "vmul_vadd" example from Xilinx repo to debug simple kernels.

The program multiplies and adds arrays, in an element-by element manner.

During debug, I can inspect values of global int arguments such as a, b, c:

__kernel __attribute__ ((reqd_work_group_size(1, 1, 1)))
void krnl_vmul(__global int* a, __global int* b, __global int* c)
    for(int i = 0; i < 16; i++){
        c[i] = a[i] * b[i];

Original code uses arrays of ints. I modified this to work with instead with array of floats, but I cannot see the previous values as in the previous case during debugging:

GNU gdb (GDB) 7.8
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Reading symbols from /home/wimi/lvs/ESA_Projects/sda20154/SDx-master/Examples/SDAccel/GettingStarted/vmul_vadd/vector_mult_add/impl/sim/cpu_em/vector_mult_add.exe...done.
(gdb) b krnl_vmul
Function "krnl_vmul" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (krnl_vmul) pending.
(gdb) r
Starting program: /home/wimi/lvs/ESA_Projects/sda20154/SDx-master/Examples/SDAccel/GettingStarted/vmul_vadd/vector_mult_add/impl/sim/cpu_em/vector_mult_add.exe bin_vmul.xclbin bin_vadd.xclbin
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff671a700 (LWP 2506)]
[New Thread 0x7ffff5d19700 (LWP 2507)]
[New Thread 0x7ffff5318700 (LWP 2508)]
[New Thread 0x7ffff470d700 (LWP 2509)]
[Switching to Thread 0x7ffff470d700 (LWP 2509)]

Breakpoint 1, krnl_vmul ()
    at /home/wimi/lvs/ESA_Projects/sda20154/SDx-master/Examples/SDAccel/GettingStarted/vmul_vadd/vector_mult_add/impl/_xocc_bin_vmul_link.dir/impl/kernels/krnl_vmul/krnl_vmul/cpu_sources/krnl_vmul.cl:45
45	        c[i] = a[i] * b[i];
(gdb) p a[0]
cannot subscript something of type `<data variable, no debug info>'
(gdb) p a[1]
cannot subscript something of type `<data variable, no debug info>'
(gdb) p b[0]
cannot subscript something of type `<data variable, no debug info>'

is this expected with floats?

I attach the whole project code.


Thank you for your help.




L30nardo SV
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