scripts/qemugdb/timers.py

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