Inspired by GObject/GType pretty printer.
Example:
machine_set_accel (obj=0x555556807550 [pc-i440fx-4.0-machine],...
Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
scripts/qemu-gdb.py | 58 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
mode change 100644 => 100755 scripts/qemu-gdb.py
diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py
old mode 100644
new mode 100755
index 690827e6fc6..90c6fd13b93
--- a/scripts/qemu-gdb.py
+++ b/scripts/qemu-gdb.py
@@ -21,6 +21,9 @@ import gdb
import os, sys
+if sys.version_info[0] >= 3:
+ long = int
+
# Annoyingly, gdb doesn't put the directory of scripts onto the
# module search path. Do it manually.
@@ -47,3 +50,58 @@ coroutine.CoroutinePCFunction()
# Default to silently passing through SIGUSR1, because QEMU sends it
# to itself a lot.
gdb.execute('handle SIGUSR1 pass noprint nostop')
+
+
+def is_object(val):
+ def is_object_helper(type):
+ if str(type) == "Object":
+ return True
+
+ while type.code == gdb.TYPE_CODE_TYPEDEF:
+ type = type.target()
+
+ if type.code != gdb.TYPE_CODE_STRUCT:
+ return False
+
+ fields = type.fields()
+ if len (fields) < 1:
+ return False
+
+ first_field = fields[0]
+ return is_object_helper(first_field.type)
+
+ type = val.type
+ if type.code != gdb.TYPE_CODE_PTR:
+ return False
+ type = type.target()
+ return is_object_helper (type)
+
+
+def object_class_name(instance):
+ try:
+ inst = instance.cast(gdb.lookup_type("Object").pointer())
+ klass = inst["class"]
+ typ = klass["type"]
+ return typ["name"].string()
+ except RuntimeError:
+ pass
+
+
+class QObjectPrinter:
+ def __init__(self, val):
+ self.val = val
+
+ def to_string(self):
+ name = object_class_name(self.val)
+ if name:
+ return ("0x%x [%s]")% (long(self.val), name)
+ return ("0x%x") % (long(self.val))
+
+
+def lookup_type(val):
+ if is_object(val):
+ return QObjectPrinter(val)
+ return None
+
+
+gdb.pretty_printers.append(lookup_type)
--
2.20.1.98.gecbdaf0899
