90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
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#!/usr/bin/python
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# GDB debugging support
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#
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# Copyright 2012 Red Hat, Inc. and/or its affiliates
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#
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# Authors:
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# Avi Kivity <avi@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2. See
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# the COPYING file in the top-level directory.
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#
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# Contributions after 2012-01-13 are licensed under the terms of the
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# GNU GPL, version 2 or (at your option) any later version.
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import gdb
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def isnull(ptr):
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return ptr == gdb.Value(0).cast(ptr.type)
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def int128(p):
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return long(p['lo']) + (long(p['hi']) << 64)
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class QemuCommand(gdb.Command):
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'''Prefix for QEMU debug support commands'''
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def __init__(self):
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gdb.Command.__init__(self, 'qemu', gdb.COMMAND_DATA,
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gdb.COMPLETE_NONE, True)
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class MtreeCommand(gdb.Command):
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'''Display the memory tree hierarchy'''
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def __init__(self):
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gdb.Command.__init__(self, 'qemu mtree', gdb.COMMAND_DATA,
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gdb.COMPLETE_NONE)
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self.queue = []
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def invoke(self, arg, from_tty):
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self.seen = set()
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self.queue_root('address_space_memory')
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self.queue_root('address_space_io')
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self.process_queue()
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def queue_root(self, varname):
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ptr = gdb.parse_and_eval(varname)['root']
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self.queue.append(ptr)
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def process_queue(self):
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while self.queue:
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ptr = self.queue.pop(0)
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if long(ptr) in self.seen:
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continue
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self.print_item(ptr)
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def print_item(self, ptr, offset = gdb.Value(0), level = 0):
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self.seen.add(long(ptr))
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addr = ptr['addr']
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addr += offset
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size = int128(ptr['size'])
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alias = ptr['alias']
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klass = ''
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if not isnull(alias):
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klass = ' (alias)'
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elif not isnull(ptr['ops']):
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klass = ' (I/O)'
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elif bool(ptr['ram']):
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klass = ' (RAM)'
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gdb.write('%s%016x-%016x %s%s (@ %s)\n'
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% (' ' * level,
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long(addr),
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long(addr + (size - 1)),
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ptr['name'].string(),
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klass,
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ptr,
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),
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gdb.STDOUT)
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if not isnull(alias):
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gdb.write('%s alias: %s@%016x (@ %s)\n' %
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(' ' * level,
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alias['name'].string(),
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ptr['alias_offset'],
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alias,
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),
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gdb.STDOUT)
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self.queue.append(alias)
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subregion = ptr['subregions']['tqh_first']
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level += 1
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while not isnull(subregion):
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self.print_item(subregion, addr, level)
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subregion = subregion['subregions_link']['tqe_next']
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QemuCommand()
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MtreeCommand()
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