scripts/qemugdb/timers.py

   1 #!/usr/bin/python
   2 # GDB debugging support
   3 #
   4 # Copyright 2017 Linaro Ltd
   5 #
   6 # Author: Alex Bennée <alex.bennee@linaro.org>
   7 #
   8 # This work is licensed under the terms of the GNU GPL, version 2.  See
   9 # the COPYING file in the top-level directory.
  10
  11 # 'qemu timers' -- display the current timerlists
  12
  13 import gdb
  14
  15 class TimersCommand(gdb.Command):
  16     '''Display the current QEMU timers'''
  17
  18     def __init__(self):
  19         'Register the class as a gdb command'
  20         gdb.Command.__init__(self, 'qemu timers', gdb.COMMAND_DATA,
  21                              gdb.COMPLETE_NONE)
  22
  23     def dump_timers(self, timer):
  24         "Follow a timer and recursively dump each one in the list."
  25         # timer should be of type QemuTimer
  26         gdb.write("    timer %s/%s (cb:%s,opq:%s)\n" % (
  27             timer['expire_time'],
  28             timer['scale'],
  29             timer['cb'],
  30             timer['opaque']))
  31
  32         if int(timer['next']) > 0:
  33             self.dump_timers(timer['next'])
  34
  35
  36     def process_timerlist(self, tlist, ttype):
  37         gdb.write("Processing %s timers\n" % (ttype))
  38         gdb.write("  clock %s is enabled:%s, last:%s\n" % (
  39             tlist['clock']['type'],
  40             tlist['clock']['enabled'],
  41             tlist['clock']['last']))
  42         if int(tlist['active_timers']) > 0:
  43             self.dump_timers(tlist['active_timers'])
  44
  45
  46     def invoke(self, arg, from_tty):
  47         'Run the command'
  48         main_timers = gdb.parse_and_eval("main_loop_tlg")
  49
  50         # This will break if QEMUClockType in timer.h is redfined
  51         self.process_timerlist(main_timers['tl'][0], "Realtime")
  52         self.process_timerlist(main_timers['tl'][1], "Virtual")
  53         self.process_timerlist(main_timers['tl'][2], "Host")
  54         self.process_timerlist(main_timers['tl'][3], "Virtual RT")