Commit c24999fa authored by Alex Bennée's avatar Alex Bennée Committed by Paolo Bonzini
Browse files

scripts/qemu-gdb/timers.py: new helper to dump timer state 



This introduces the qemu-gdb command "qemu timers" which will dump the
state of the main timers in the system.

Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent f1cd52d8

scripts/qemu-gdb.py

+2 −1
Original line number Diff line number Diff line
@@ -26,7 +26,7 @@ import os, sys 


sys.path.append(os.path.dirname(__file__))



from qemugdb import aio, mtree, coroutine, tcg

from qemugdb import aio, mtree, coroutine, tcg, timers



class QemuCommand(gdb.Command):

    '''Prefix for QEMU debug support commands'''
@@ -39,6 +39,7 @@ coroutine.CoroutineCommand() 
mtree.MtreeCommand()

aio.HandlersCommand()

tcg.TCGLockStatusCommand()

timers.TimersCommand()



coroutine.CoroutineSPFunction()

coroutine.CoroutinePCFunction()

scripts/qemugdb/timers.py

0 → 100644
+54 −0
Original line number Diff line number Diff line 
#!/usr/bin/python

# GDB debugging support

#

# Copyright 2017 Linaro Ltd

#

# Author: Alex Bennée <alex.bennee@linaro.org>

#

# This work is licensed under the terms of the GNU GPL, version 2.  See

# the COPYING file in the top-level directory.



# 'qemu timers' -- display the current timerlists



import gdb



class TimersCommand(gdb.Command):

    '''Display the current QEMU timers'''



    def __init__(self):

        'Register the class as a gdb command'

        gdb.Command.__init__(self, 'qemu timers', gdb.COMMAND_DATA,

                             gdb.COMPLETE_NONE)



    def dump_timers(self, timer):

        "Follow a timer and recursively dump each one in the list."

        # timer should be of type QemuTimer

        gdb.write("    timer %s/%s (cb:%s,opq:%s)\n" % (

            timer['expire_time'],

            timer['scale'],

            timer['cb'],

            timer['opaque']))



        if int(timer['next']) > 0:

            self.dump_timers(timer['next'])





    def process_timerlist(self, tlist, ttype):

        gdb.write("Processing %s timers\n" % (ttype))

        gdb.write("  clock %s is enabled:%s, last:%s\n" % (

            tlist['clock']['type'],

            tlist['clock']['enabled'],

            tlist['clock']['last']))

        if int(tlist['active_timers']) > 0:

            self.dump_timers(tlist['active_timers'])





    def invoke(self, arg, from_tty):

        'Run the command'

        main_timers = gdb.parse_and_eval("main_loop_tlg")



        # This will break if QEMUClockType in timer.h is redfined

        self.process_timerlist(main_timers['tl'][0], "Realtime")

        self.process_timerlist(main_timers['tl'][1], "Virtual")

        self.process_timerlist(main_timers['tl'][2], "Host")

        self.process_timerlist(main_timers['tl'][3], "Virtual RT")