forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
#
|
|
# GDB debugging support: aio/iohandler debug
|
|
#
|
|
# Copyright (c) 2015 Red Hat, Inc.
|
|
#
|
|
# Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
#
|
|
# This work is licensed under the terms of the GNU GPL, version 2 or
|
|
# later. See the COPYING file in the top-level directory.
|
|
#
|
|
|
|
import gdb
|
|
from qemugdb import coroutine
|
|
|
|
def isnull(ptr):
|
|
return ptr == gdb.Value(0).cast(ptr.type)
|
|
|
|
def dump_aiocontext(context, verbose):
|
|
'''Display a dump and backtrace for an aiocontext'''
|
|
cur = context['aio_handlers']['lh_first']
|
|
# Get pointers to functions we're going to process specially
|
|
sym_fd_coroutine_enter = gdb.parse_and_eval('fd_coroutine_enter')
|
|
|
|
while not isnull(cur):
|
|
entry = cur.dereference()
|
|
gdb.write('----\n%s\n' % entry)
|
|
if verbose and cur['io_read'] == sym_fd_coroutine_enter:
|
|
coptr = (cur['opaque'].cast(gdb.lookup_type('FDYieldUntilData').pointer()))['co']
|
|
coptr = coptr.cast(gdb.lookup_type('CoroutineUContext').pointer())
|
|
coroutine.bt_jmpbuf(coptr['env']['__jmpbuf'])
|
|
cur = cur['node']['le_next'];
|
|
|
|
gdb.write('----\n')
|
|
|
|
class HandlersCommand(gdb.Command):
|
|
'''Display aio handlers'''
|
|
def __init__(self):
|
|
gdb.Command.__init__(self, 'qemu handlers', gdb.COMMAND_DATA,
|
|
gdb.COMPLETE_NONE)
|
|
|
|
def invoke(self, arg, from_tty):
|
|
verbose = False
|
|
argv = gdb.string_to_argv(arg)
|
|
|
|
if len(argv) > 0 and argv[0] == '--verbose':
|
|
verbose = True
|
|
argv.pop(0)
|
|
|
|
if len(argv) > 1:
|
|
gdb.write('usage: qemu handlers [--verbose] [handler]\n')
|
|
return
|
|
|
|
if len(argv) == 1:
|
|
handlers_name = argv[0]
|
|
else:
|
|
handlers_name = 'qemu_aio_context'
|
|
dump_aiocontext(gdb.parse_and_eval(handlers_name), verbose)
|