old WiP: a gdb hook for libdbuswip-gdb

1 files changed, 67 insertions, 0 deletions

diff --git a/dbus/gdb_dbus.py b/dbus/gdb_dbus.py
new file mode 100644
index 00000000..8b3675c8
--- /dev/null
+++ b/dbus/gdb_dbus.py
@@ -0,0 +1,67 @@
+import gdb
+
+class DBusHashIter(object):
+    def __init__(self, val):
+        self.val = val
+        self.bucket = None
+        self.entry = None
+        self.next_entry = None
+        self.next_bucket = 0
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        while self.next_entry is None:
+            if self.next_bucket > long(self.val['n_buckets']):
+                self.entry = None
+                self.val = None
+                self.bucket = None
+                raise StopIteration
+
+            self.bucket = self.val['buckets'][self.next_bucket].address
+            assert self.bucket is not None
+            self.next_entry = self.bucket.dereference()
+            self.next_bucket = self.next_bucket + 1
+
+        assert self.next_entry is not None
+        assert self.bucket is not None
+
+        self.entry = self.next_entry
+        self.next_entry = self.next_entry['next']
+
+        # FIXME: assumes string keys
+        return (self.entry['key'].cast(gdb.lookup_type('char').pointer()), self.entry['value'].cast(gdb.lookup_type('DBusList').pointer().pointer()))
+
+class DBusHashPrinter(object):
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        return 'DBusHash with %d entries' % (self.val['n_entries'])
+
+    def display_hint(self):
+        return 'map'
+
+    def children(self):
+        kids = []
+
+        for kid in DBusHashIter(self.val):
+            kids.append(kid[0])
+            kids.append(kid[1])
+
+        return kids
+
+def dbus_lookup_function(val):
+    lookup_tag = str(val.type)
+
+    Printer = {
+            'DBusHashTable *': DBusHashPrinter,
+            }.get(lookup_tag, None)
+
+    if Printer is not None:
+        return Printer(val)
+
+    return None
+
+gdb.current_progspace().pretty_printers.append(dbus_lookup_function)