[Xen-devel] [PATCH] extend qemu-dm.debug to use ddd for device model debugging

["Andrew D. Ball" <aball@xxxxxxxxxx>]

This patch modifies the qemu-dm.debug shell script to call ddd.  I have tested 
it with
xm-test against xen-unstable.hg changeset 8497, with no evidence of regression.

Andrew

==================
Andrew D. Ball
aball@xxxxxxxxxx
'Festina lente'


Add support to the qemu-dm.debug script to launch a ddd window running
gdb on the device model for fully virtualized domU's.

Signed-off-by: Chip Blach <chipper@xxxxxxxxxx>
Signed-off-by: Andrew D. Ball <aball@xxxxxxxxxx>

diff -r 9efe7eb108e1 tools/examples/xmexample.vmx
--- a/tools/examples/xmexample.vmx      Wed Jan  4 17:51:38 2006
+++ b/tools/examples/xmexample.vmx      Thu Jan  5 18:10:24 2006
@@ -100,6 +100,15 @@
 
 # New stuff
 device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
+# Use this instead for device model debugging [launches ddd in a new window 
+# for qemu-dm]
+#
+# To get debugging symbols in qemu-dm, you can copy 
+#   tools/ioemu/target-i386-dm/qemu-dm from a built Xen source tree to
+# /usr/lib/xen/bin/qemu-dm or /usr/lib64/xen/bin/qemu-dm , depending
+# on where your qemu-dm sits
+#device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm.debug'
+
 
 #-----------------------------------------------------------------------------
 # Disk image for 
diff -r 9efe7eb108e1 tools/ioemu/target-i386-dm/qemu-dm.debug
--- a/tools/ioemu/target-i386-dm/qemu-dm.debug  Wed Jan  4 17:51:38 2006
+++ b/tools/ioemu/target-i386-dm/qemu-dm.debug  Thu Jan  5 18:10:24 2006
@@ -1,5 +1,26 @@
-#!/bin/sh
+#!/bin/bash
+# Subject to GPL version 2 license.
+#
+# Chip Blach <chipper@xxxxxxxxxx>
+# Andrew D. Ball <aball@xxxxxxxxxx>
+ 
+cd ~root # why does ~ mean '/' instead of '/root' here?
 
-echo $* > /tmp/args
-echo $DISPLAY >> /tmp/args
-exec /usr/lib/xen/bin/qemu-dm $*
+if [[ -z "$IOEMU" ]]
+then 
+       # Guess where the device model (qemu-dm) sits, based
+       # on architecture
+       if [[ $(uname -p) == 'x86_64' ]]
+       then
+               IOEMU=/usr/lib64/xen/bin/qemu-dm
+       else
+               IOEMU=/usr/lib/xen/bin/qemu-dm
+       fi
+fi
+       
+# set up gdb
+echo "file $IOEMU" > ioemu_debug
+echo "set args $@" >> ioemu_debug
+echo "break main" >> ioemu_debug
+
+nohup ddd --gdb --debugger "gdb -x ioemu_debug" &

qemu_debug.patch
Description: Text Data

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