* [Qemu-devel] [PATCH] scripts: add gdb support script
@ 2012-03-18 14:48 Avi Kivity
2012-03-24 16:10 ` Blue Swirl
0 siblings, 1 reply; 2+ messages in thread
From: Avi Kivity @ 2012-03-18 14:48 UTC (permalink / raw)
To: qemu-devel
Add a script that enhances gdb to be aware of QEMU data structures.
This patch adds a single gdb command, 'qemu mtree'. The command is
similar to the monitor's 'info mtree', except that it prints MemoryRegion
addresses, and except for working from a core dump as well as a live instance.
Signed-off-by: Avi Kivity <avi@redhat.com>
---
scripts/qemu-gdb.py | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 89 insertions(+), 0 deletions(-)
create mode 100644 scripts/qemu-gdb.py
diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py
new file mode 100644
index 0000000..8a0f305
--- /dev/null
+++ b/scripts/qemu-gdb.py
@@ -0,0 +1,89 @@
+#!/usr/bin/python
+
+# GDB debugging support
+#
+# Copyright 2012 Red Hat, Inc. and/or its affiliates
+#
+# Authors:
+# Avi Kivity <avi@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2. See
+# the COPYING file in the top-level directory.
+#
+# Contributions after 2012-01-13 are licensed under the terms of the
+# GNU GPL, version 2 or (at your option) any later version.
+
+
+import gdb
+
+def isnull(ptr):
+ return ptr == gdb.Value(0).cast(ptr.type)
+
+def int128(p):
+ return long(p['lo']) + (long(p['hi']) << 64)
+
+class QemuCommand(gdb.Command):
+ '''Prefix for QEMU debug support commands'''
+ def __init__(self):
+ gdb.Command.__init__(self, 'qemu', gdb.COMMAND_DATA,
+ gdb.COMPLETE_NONE, True)
+
+class MtreeCommand(gdb.Command):
+ '''Display the memory tree hierarchy'''
+ def __init__(self):
+ gdb.Command.__init__(self, 'qemu mtree', gdb.COMMAND_DATA,
+ gdb.COMPLETE_NONE)
+ self.queue = []
+ def invoke(self, arg, from_tty):
+ self.seen = set()
+ self.queue_root('address_space_memory')
+ self.queue_root('address_space_io')
+ self.process_queue()
+ def queue_root(self, varname):
+ ptr = gdb.parse_and_eval(varname)['root']
+ self.queue.append(ptr)
+ def process_queue(self):
+ while self.queue:
+ ptr = self.queue.pop(0)
+ if long(ptr) in self.seen:
+ continue
+ self.print_item(ptr)
+ def print_item(self, ptr, offset = gdb.Value(0), level = 0):
+ self.seen.add(long(ptr))
+ addr = ptr['addr']
+ addr += offset
+ size = int128(ptr['size'])
+ alias = ptr['alias']
+ klass = ''
+ if not isnull(alias):
+ klass = ' (alias)'
+ elif not isnull(ptr['ops']):
+ klass = ' (I/O)'
+ elif bool(ptr['ram']):
+ klass = ' (RAM)'
+ gdb.write('%s%016x-%016x %s%s (@ %s)\n'
+ % (' ' * level,
+ long(addr),
+ long(addr + (size - 1)),
+ ptr['name'].string(),
+ klass,
+ ptr,
+ ),
+ gdb.STDOUT)
+ if not isnull(alias):
+ gdb.write('%s alias: %s@%016x (@ %s)\n' %
+ (' ' * level,
+ alias['name'].string(),
+ ptr['alias_offset'],
+ alias,
+ ),
+ gdb.STDOUT)
+ self.queue.append(alias)
+ subregion = ptr['subregions']['tqh_first']
+ level += 1
+ while not isnull(subregion):
+ self.print_item(subregion, addr, level)
+ subregion = subregion['subregions_link']['tqe_next']
+
+QemuCommand()
+MtreeCommand()
--
1.7.9
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] [PATCH] scripts: add gdb support script
2012-03-18 14:48 [Qemu-devel] [PATCH] scripts: add gdb support script Avi Kivity
@ 2012-03-24 16:10 ` Blue Swirl
0 siblings, 0 replies; 2+ messages in thread
From: Blue Swirl @ 2012-03-24 16:10 UTC (permalink / raw)
To: Avi Kivity; +Cc: qemu-devel
Thanks, applied.
On Sun, Mar 18, 2012 at 14:48, Avi Kivity <avi@redhat.com> wrote:
> Add a script that enhances gdb to be aware of QEMU data structures.
>
> This patch adds a single gdb command, 'qemu mtree'. The command is
> similar to the monitor's 'info mtree', except that it prints MemoryRegion
> addresses, and except for working from a core dump as well as a live instance.
>
> Signed-off-by: Avi Kivity <avi@redhat.com>
> ---
> scripts/qemu-gdb.py | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 89 insertions(+), 0 deletions(-)
> create mode 100644 scripts/qemu-gdb.py
>
> diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py
> new file mode 100644
> index 0000000..8a0f305
> --- /dev/null
> +++ b/scripts/qemu-gdb.py
> @@ -0,0 +1,89 @@
> +#!/usr/bin/python
> +
> +# GDB debugging support
> +#
> +# Copyright 2012 Red Hat, Inc. and/or its affiliates
> +#
> +# Authors:
> +# Avi Kivity <avi@redhat.com>
> +#
> +# This work is licensed under the terms of the GNU GPL, version 2. See
> +# the COPYING file in the top-level directory.
> +#
> +# Contributions after 2012-01-13 are licensed under the terms of the
> +# GNU GPL, version 2 or (at your option) any later version.
> +
> +
> +import gdb
> +
> +def isnull(ptr):
> + return ptr == gdb.Value(0).cast(ptr.type)
> +
> +def int128(p):
> + return long(p['lo']) + (long(p['hi']) << 64)
> +
> +class QemuCommand(gdb.Command):
> + '''Prefix for QEMU debug support commands'''
> + def __init__(self):
> + gdb.Command.__init__(self, 'qemu', gdb.COMMAND_DATA,
> + gdb.COMPLETE_NONE, True)
> +
> +class MtreeCommand(gdb.Command):
> + '''Display the memory tree hierarchy'''
> + def __init__(self):
> + gdb.Command.__init__(self, 'qemu mtree', gdb.COMMAND_DATA,
> + gdb.COMPLETE_NONE)
> + self.queue = []
> + def invoke(self, arg, from_tty):
> + self.seen = set()
> + self.queue_root('address_space_memory')
> + self.queue_root('address_space_io')
> + self.process_queue()
> + def queue_root(self, varname):
> + ptr = gdb.parse_and_eval(varname)['root']
> + self.queue.append(ptr)
> + def process_queue(self):
> + while self.queue:
> + ptr = self.queue.pop(0)
> + if long(ptr) in self.seen:
> + continue
> + self.print_item(ptr)
> + def print_item(self, ptr, offset = gdb.Value(0), level = 0):
> + self.seen.add(long(ptr))
> + addr = ptr['addr']
> + addr += offset
> + size = int128(ptr['size'])
> + alias = ptr['alias']
> + klass = ''
> + if not isnull(alias):
> + klass = ' (alias)'
> + elif not isnull(ptr['ops']):
> + klass = ' (I/O)'
> + elif bool(ptr['ram']):
> + klass = ' (RAM)'
> + gdb.write('%s%016x-%016x %s%s (@ %s)\n'
> + % (' ' * level,
> + long(addr),
> + long(addr + (size - 1)),
> + ptr['name'].string(),
> + klass,
> + ptr,
> + ),
> + gdb.STDOUT)
> + if not isnull(alias):
> + gdb.write('%s alias: %s@%016x (@ %s)\n' %
> + (' ' * level,
> + alias['name'].string(),
> + ptr['alias_offset'],
> + alias,
> + ),
> + gdb.STDOUT)
> + self.queue.append(alias)
> + subregion = ptr['subregions']['tqh_first']
> + level += 1
> + while not isnull(subregion):
> + self.print_item(subregion, addr, level)
> + subregion = subregion['subregions_link']['tqe_next']
> +
> +QemuCommand()
> +MtreeCommand()
> --
> 1.7.9
>
>
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2012-03-18 14:48 [Qemu-devel] [PATCH] scripts: add gdb support script Avi Kivity
2012-03-24 16:10 ` Blue Swirl
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