tools/lldbmacros/counter.py

   1 from memory import IterateZPerCPU
   2 from xnu import *
   3
   4 @lldb_type_summary(['scalable_counter_t'])
   5 @header("Counter Value\n-------------")
   6 def GetSimpleCounter(counter):
   7     """ Prints out the value of a percpu counter
   8         params: counter: value - value object representing counter
   9         returns: str - THe value of the counter as a string.
  10     """
  11     val = 0
  12     for v in IterateZPerCPU(counter, "uint64_t *"):
  13         val += dereference(v)
  14     return str(val)
  15
  16 @lldb_command('showcounter')
  17 def ShowSimpleCounter(cmd_args=None):
  18     """ Show the value of a percpu counter.
  19         Usage: showcounter <address of counter>
  20     """
  21     if not cmd_args:
  22         raise ArgumentError("Please specify the address of the counter you want to read.")
  23         return
  24     print GetSimpleCounter(kern.GetValueFromAddress(cmd_args[0], "scalable_counter_t"))