1 files changed, 295 insertions, 0 deletions
diff --git a/Release/share/glib-2.0/gdb/gobject_gdb.py b/Release/share/glib-2.0/gdb/gobject_gdb.py
new file mode 100644
index 0000000..8c30220
--- /dev/null
+++ b/Release/share/glib-2.0/gdb/gobject_gdb.py
@@ -0,0 +1,295 @@
+import os.path
+import gdb
+import glib_gdb
+import sys
+
+if sys.version_info[0] >= 3:
+    long = int
+else:
+    import itertools
+    map = itertools.imap
+
+# FrameDecorator is new in gdb 7.7, so we adapt to its absence.
+try:
+    import gdb.FrameDecorator
+    HAVE_GDB_FRAMEDECORATOR = True
+    FrameDecorator = gdb.FrameDecorator.FrameDecorator
+except ImportError:
+    HAVE_GDB_FRAMEDECORATOR = False
+
+# This is not quite right, as local vars may override symname
+def read_global_var (symname):
+    return gdb.selected_frame().read_var(symname)
+
+def g_type_to_name (gtype):
+    def lookup_fundamental_type (typenode):
+        if typenode == 0:
+            return None
+        val = read_global_var ("static_fundamental_type_nodes")
+        if val == None:
+            return None
+        return val[typenode >> 2].address()
+
+    gtype = long(gtype)
+    typenode = gtype - gtype % 4
+    if typenode > (255 << 2):
+        typenode = gdb.Value(typenode).cast (gdb.lookup_type("TypeNode").pointer())
+    else:
+        typenode = lookup_fundamental_type (typenode)
+    if typenode != None:
+        return glib_gdb.g_quark_to_string (typenode["qname"])
+    return None
+
+def is_g_type_instance (val):
+    def is_g_type_instance_helper (type):
+        if str(type) == "GTypeInstance":
+            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_g_type_instance_helper(first_field.type)
+
+    type = val.type
+    if type.code != gdb.TYPE_CODE_PTR:
+        return False
+    type = type.target()
+    return is_g_type_instance_helper (type)
+
+def g_type_name_from_instance (instance):
+    if long(instance) != 0:
+        try:
+            inst = instance.cast (gdb.lookup_type("GTypeInstance").pointer())
+            klass = inst["g_class"]
+            gtype = klass["g_type"]
+            name = g_type_to_name (gtype)
+            return name
+        except RuntimeError:
+            pass
+    return None
+
+class GTypePrettyPrinter:
+    "Prints a GType instance pointer"
+
+    def __init__ (self, val):
+        self.val = val
+
+    def to_string (self):
+        name = g_type_name_from_instance (self.val)
+        if name:
+            return ("0x%x [%s]")% (long(self.val), name)
+        return  ("0x%x") % (long(self.val))
+
+def pretty_printer_lookup (val):
+    if is_g_type_instance (val):
+        return GTypePrettyPrinter (val)
+
+    return None
+
+def get_signal_name (id):
+    if id == None:
+        return None
+    id = long(id)
+    if id == 0:
+        return None
+    val = read_global_var ("g_signal_nodes")
+    max_s = read_global_var ("g_n_signal_nodes")
+    max_s = long(max_s)
+    if id < max_s:
+        return val[id]["name"].string()
+    return None
+
+def frame_name(frame):
+    return str(frame.function())
+
+def frame_var(frame, var):
+    return frame.inferior_frame().read_var(var)
+
+
+class SignalFrame(FrameDecorator):
+    def __init__ (self, frames):
+        FrameDecorator.__init__(self, frames[-1])
+        self.frame = frames[-1]
+        self.frames = frames
+
+    def name (self):
+        return "signal-emission"
+
+    def read_var (self, frame, name, array = None):
+        try:
+            v = frame_var (frame, name)
+            if v == None or v.is_optimized_out:
+                return None
+            if array != None:
+                array.append (v)
+            return v
+        except ValueError:
+            return None
+
+    def read_object (self, frame, name, array = None):
+        try:
+            v = frame_var (frame, name)
+            if v == None or v.is_optimized_out:
+                return None
+            v = v.cast (gdb.lookup_type("GObject").pointer())
+            # Ensure this is a somewhat correct object pointer
+            if v != None and g_type_name_from_instance (v):
+                if array != None:
+                    array.append (v)
+                return v
+            return None
+        except ValueError:
+            return None
+
+    def append (self, array, obj):
+        if obj != None:
+            array.append (obj)
+
+    def or_join_array (self, array):
+        if len(array) == 0:
+            return "???"
+        else:
+            return ' or '.join(set(map(str, array)))
+
+    def get_detailed_signal_from_frame(self, frame, signal):
+        detail = self.read_var (frame, "detail")
+        detail = glib_gdb.g_quark_to_string (detail)
+        if detail is not None:
+            return signal + ":" + detail
+        else:
+            return detail
+
+    def function (self):
+        instances = []
+        signals = []
+
+        for frame in self.frames:
+            name = frame_name(frame)
+            if name == "signal_emit_unlocked_R":
+                self.read_object (frame, "instance", instances)
+                node = self.read_var (frame, "node")
+                if node:
+                    signal = node["name"].string()
+                    signal = self.get_detailed_signal_from_frame(frame, signal)
+                    self.append(signals, signal)
+
+            if name == "g_signal_emitv":
+                instance_and_params = self.read_var (frame, "instance_and_params")
+                if instance_and_params:
+                    instance = instance_and_params[0]["v_pointer"].cast (gdb.Type("GObject").pointer())
+                    self.append (instances, instance)
+                id = self.read_var (frame, "signal_id")
+                signal = get_signal_name (id)
+                if signal:
+                    signal = self.get_detailed_signal_from_frame(frame, signal)
+                    self.append (signals, signal)
+
+            if name == "g_signal_emit_valist" or name == "g_signal_emit":
+                self.read_object (frame, "instance", instances)
+                id = self.read_var (frame, "signal_id")
+                signal = get_signal_name (id)
+                if signal:
+                    signal = self.get_detailed_signal_from_frame(frame, signal)
+                    self.append (signals, signal)
+
+            if name == "g_signal_emit_by_name":
+                self.read_object (frame, "instance", instances)
+                self.read_var (frame, "detailed_signal", signals)
+                break
+
+        instance = self.or_join_array (instances)
+        signal = self.or_join_array (signals)
+
+        return "<emit signal %s on instance %s>" %  (signal, instance)
+
+    def elided (self):
+        return self.frames[0:-1]
+
+    def describe (self, stream, full):
+        stream.write (" " + self.function () + "\n")
+
+class GFrameDecorator:
+    def __init__ (self, iter):
+        self.queue = []
+        self.iter = iter
+
+    def __iter__ (self):
+        return self
+
+    def fill (self):
+        while len(self.queue) <= 8:
+            try:
+                f = next(self.iter)
+                self.queue.append (f)
+            except StopIteration:
+                return
+
+    def find_signal_emission (self):
+        for i in range (min (len(self.queue), 3)):
+            if frame_name(self.queue[i]) == "signal_emit_unlocked_R":
+                return i
+        return -1
+
+    def next (self):
+        # Ensure we have enough frames for a full signal emission
+        self.fill()
+
+        # Are we at the end?
+        if len(self.queue) == 0:
+            raise StopIteration
+
+        emission = self.find_signal_emission ()
+        if emission > 0:
+            start = emission
+            while True:
+                if start == 0:
+                    break
+                prev_name = frame_name(self.queue[start-1])
+                if prev_name.find("_marshal_") >= 0 or prev_name == "g_closure_invoke":
+                    start = start - 1
+                else:
+                    break
+            end = emission + 1
+            while end < len(self.queue):
+                if frame_name(self.queue[end]) in ["g_signal_emitv",
+                                                   "g_signal_emit_valist",
+                                                   "g_signal_emit",
+                                                   "g_signal_emit_by_name",
+                                                   "_g_closure_invoke_va"]:
+                    end = end + 1
+                else:
+                    break
+
+            signal_frames = self.queue[start:end]
+            new_frames = [SignalFrame(signal_frames)]
+            self.queue[start:end] = new_frames
+
+        return self.queue.pop(0)
+
+    def __next__ (self):
+        return self.next()
+
+class GFrameFilter(object):
+    name = 'glib'
+    enabled = True
+    priority = 100
+
+    def filter(self, iterator):
+        return GFrameDecorator(iterator)
+
+def register (obj):
+    if obj == None:
+        obj = gdb
+
+    if HAVE_GDB_FRAMEDECORATOR:
+        filter = GFrameFilter()
+        obj.frame_filters[filter.name] = filter
+    obj.pretty_printers.append(pretty_printer_lookup)