scripts/qemugdb/timers.py

   1 # -*- coding: utf-8 -*-
   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 or later.
   9 # See the COPYING file in the top-level directory.
  10 #
  11 # SPDX-License-Identifier: GPL-2.0-or-later
  12
  13 # 'qemu timers' -- display the current timerlists
  14
  15 import gdb
  16
  17 class TimersCommand(gdb.Command):
  18     '''Display the current QEMU timers'''
  19
  20     def __init__(self):
  21         'Register the class as a gdb command'
  22         gdb.Command.__init__(self, 'qemu timers', gdb.COMMAND_DATA,
  23                              gdb.COMPLETE_NONE)
  24
  25     def dump_timers(self, timer):
  26         "Follow a timer and recursively dump each one in the list."
  27         # timer should be of type QemuTimer
  28         gdb.write("    timer %s/%s (cb:%s,opq:%s)\n" % (
  29             timer['expire_time'],
  30             timer['scale'],
  31             timer['cb'],
  32             timer['opaque']))
  33
  34         if int(timer['next']) > 0:
  35             self.dump_timers(timer['next'])
  36
  37
  38     def process_timerlist(self, tlist, ttype):
  39         gdb.write("Processing %s timers\n" % (ttype))
  40         gdb.write("  clock %s is enabled:%s, last:%s\n" % (
  41             tlist['clock']['type'],
  42             tlist['clock']['enabled'],
  43             tlist['clock']['last']))
  44         if int(tlist['active_timers']) > 0:
  45             self.dump_timers(tlist['active_timers'])
  46
  47
  48     def invoke(self, arg, from_tty):
  49         'Run the command'
  50         main_timers = gdb.parse_and_eval("main_loop_tlg")
  51
  52         # This will break if QEMUClockType in timer.h is redfined
  53         self.process_timerlist(main_timers['tl'][0], "Realtime")
  54         self.process_timerlist(main_timers['tl'][1], "Virtual")
  55         self.process_timerlist(main_timers['tl'][2], "Host")
  56         self.process_timerlist(main_timers['tl'][3], "Virtual RT")