gistfile1.txt

(gdb) python import collections;d = collections.deque(maxlen=10)
(gdb) set height 0
(gdb) break main
(gdb) run
(gdb) watch hello_world
(gdb) commands
>python
 >global d
 >d.append(int(gdb.lookup_symbol("hello_world")[0].value(gdb.selected_frame())))
 >end
 > continue
>end
(gdb) continue
(gdb) python print(d)

   import numpy as np
   import matplotlib.pyplot as plt
   ind = np.arange(len(d))
   p1 = plt.bar(ind,xval,0.1,color='r')
   ply.ylabel("Values")
   plt.title("Values of hello_world")
   plt.yticks(np.arange(0,81,10))
   plt.show()