From 70b62a800343f7ced7b34c19b122436e7cfd27d7 Mon Sep 17 00:00:00 2001 From: JNDTUHH Date: Sun, 14 Jan 2018 18:17:10 +0100 Subject: Update --- Release/share/glib-2.0/gdb/gobject.py | 305 ++++++++++++++++++++++++++++++++++ 1 file changed, 305 insertions(+) create mode 100644 Release/share/glib-2.0/gdb/gobject.py (limited to 'Release/share/glib-2.0/gdb/gobject.py') diff --git a/Release/share/glib-2.0/gdb/gobject.py b/Release/share/glib-2.0/gdb/gobject.py new file mode 100644 index 0000000..b96d150 --- /dev/null +++ b/Release/share/glib-2.0/gdb/gobject.py @@ -0,0 +1,305 @@ +import gdb +import glib +import gdb.backtrace +import gdb.command.backtrace + +# 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.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 + +class GFrameWrapper: + def __init__ (self, frame): + self.frame = frame; + + def name (self): + name = self.frame.name() + if name and name.startswith("IA__"): + return name[4:] + return name + + def __getattr__ (self, name): + return getattr (self.frame, name) + +# Monkey patch FrameWrapper to avoid IA__ in symbol names +old__init__ = gdb.command.backtrace.FrameWrapper.__init__ +def monkey_patched_init(self, frame): + name = frame.name() + if name and name.startswith("IA__"): + frame = GFrameWrapper(frame) + old__init__(self,frame) +gdb.command.backtrace.FrameWrapper.__init__ = monkey_patched_init + +class DummyFrame: + def __init__ (self, frame): + self.frame = frame + + def name (self): + return "signal-emission-dummy" + + def describe (self, stream, full): + stream.write (" <...>\n") + + def __getattr__ (self, name): + return getattr (self.frame, name) + +class SignalFrame: + def __init__ (self, frames): + self.frame = frames[-1] + self.frames = frames; + + def name (self): + return "signal-emission" + + def read_var (self, frame, name, array = None): + try: + v = frame.read_var (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.read_var (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 "???" + + v = {} + for i in range(len(array)): + v[str(array[i])] = 1 + array = v.keys() + s = array[0] + for i in range(1, len(array)): + s = s + " or %s"%array[i] + + return s + + def describe (self, stream, full): + instances = [] + signals = [] + + for frame in self.frames: + name = frame.name() + if name == "signal_emit_unlocked_R": + self.read_object (frame, "instance", instances) + node = self.read_var (frame, "node") + if node: + signal = node["name"].string() + detail = self.read_var (frame, "detail") + detail = glib.g_quark_to_string (detail) + if detail != None: + signal = signal + ":" + detail + 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: + detail = self.read_var (frame, "detail") + detail = glib.g_quark_to_string (detail) + if detail != None: + signal = signal + ":" + detail + 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: + detail = self.read_var (frame, "detail") + detail = glib.g_quark_to_string (detail) + if detail != None: + signal = signal + ":" + detail + 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) + + stream.write (" \n" % (signal, instance)) + + def __getattr__ (self, name): + return getattr (self.frame, name) + +class GFrameFilter: + def __init__ (self, iter): + self.queue = [] + self.iter = iter + + def __iter__ (self): + return self + + def fill (self): + while len(self.queue) <= 6: + try: + f = self.iter.next () + self.queue.append (f) + except StopIteration: + return + + def find_signal_emission (self): + for i in range (min (len(self.queue), 3)): + if self.queue[i].name() == "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 = self.queue[start-1].name() + if prev_name.find("_marshal_") or prev_name == "g_closure_invoke": + start = start - 1 + else: + break + end = emission + 1 + while end < len(self.queue): + if self.queue[end].name() in ["g_signal_emitv", + "g_signal_emit_valist", + "g_signal_emit", + "g_signal_emit_by_name"]: + end = end + 1 + else: + break + + signal_frames = self.queue[start:end] + new_frames = [] + for i in range(len(signal_frames)-1): + new_frames.append(DummyFrame(signal_frames[i])) + new_frames.append(SignalFrame(signal_frames)) + + self.queue[start:end] = new_frames + + return self.queue.pop(0) + + +def register (obj): + if obj == None: + obj = gdb + + gdb.backtrace.push_frame_filter (GFrameFilter) + obj.pretty_printers.append(pretty_printer_lookup) -- cgit v1.2.1