Update monet.

tools/gdb/gdb_chrome.py

+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""GDB support for Chrome types.
+
+Add this to your gdb by amending your ~/.gdbinit as follows:
+  python
+  import sys
+  sys.path.insert(0, "/path/to/tools/gdb/")
+  import gdb_chrome
+  end
+
+Use
+  (gdb) p /r any_variable
+to print |any_variable| without using any printers.
+"""
+
+import datetime
+import gdb
+import gdb.printing
+import os
+import sys
+
+sys.path.insert(0, os.path.join(
+    os.path.dirname(os.path.abspath(__file__)),
+    '..', '..', 'third_party', 'WebKit', 'Tools', 'gdb'))
+try:
+  import webkit
+finally:
+  sys.path.pop(0)
+
+# When debugging this module, set the below variable to True, and then use
+#   (gdb) python del sys.modules['gdb_chrome']
+#   (gdb) python import gdb_chrome
+# to reload.
+_DEBUGGING = False
+
+
+pp_set = gdb.printing.RegexpCollectionPrettyPrinter("chromium")
+
+
+def typed_ptr(ptr):
+    """Prints a pointer along with its exact type.
+
+    By default, gdb would print just the address, which takes more
+    steps to interpret.
+    """
+    # Returning this as a cast expression surrounded by parentheses
+    # makes it easier to cut+paste inside of gdb.
+    return '((%s)%s)' % (ptr.dynamic_type, ptr)
+
+
+def yield_fields(val):
+    """Use this in a printer's children() method to print an object's fields.
+
+    e.g.
+      def children():
+        for result in yield_fields(self.val):
+          yield result
+    """
+    try:
+        fields = val.type.target().fields()
+    except:
+        fields = val.type.fields()
+    for field in fields:
+        if field.is_base_class:
+            yield (field.name, val.cast(gdb.lookup_type(field.name)))
+        else:
+            yield (field.name, val[field.name])
+
+
+class Printer(object):
+    def __init__(self, val):
+        self.val = val
+
+
+class StringPrinter(Printer):
+    def display_hint(self):
+        return 'string'
+
+
+class String16Printer(StringPrinter):
+    def to_string(self):
+        return webkit.ustring_to_string(self.val['_M_dataplus']['_M_p'])
+pp_set.add_printer(
+    'string16',
+    '^string16|std::basic_string<(unsigned short|base::char16).*>$',
+    String16Printer);
+
+
+class GURLPrinter(StringPrinter):
+    def to_string(self):
+        return self.val['spec_']
+pp_set.add_printer('GURL', '^GURL$', GURLPrinter)
+
+
+class FilePathPrinter(StringPrinter):
+    def to_string(self):
+        return self.val['path_']['_M_dataplus']['_M_p']
+pp_set.add_printer('FilePath', '^FilePath$', FilePathPrinter)
+
+
+class SizePrinter(Printer):
+    def to_string(self):
+        return '%sx%s' % (self.val['width_'], self.val['height_'])
+pp_set.add_printer('gfx::Size', '^gfx::(Size|SizeF|SizeBase<.*>)$', SizePrinter)
+
+
+class PointPrinter(Printer):
+    def to_string(self):
+        return '%s,%s' % (self.val['x_'], self.val['y_'])
+pp_set.add_printer('gfx::Point', '^gfx::(Point|PointF|PointBase<.*>)$',
+                   PointPrinter)
+
+
+class RectPrinter(Printer):
+    def to_string(self):
+        return '%s %s' % (self.val['origin_'], self.val['size_'])
+pp_set.add_printer('gfx::Rect', '^gfx::(Rect|RectF|RectBase<.*>)$',
+                   RectPrinter)
+
+
+class SmartPtrPrinter(Printer):
+    def to_string(self):
+        return '%s%s' % (self.typename, typed_ptr(self.ptr()))
+
+
+class ScopedRefPtrPrinter(SmartPtrPrinter):
+    typename = 'scoped_refptr'
+    def ptr(self):
+        return self.val['ptr_']
+pp_set.add_printer('scoped_refptr', '^scoped_refptr<.*>$', ScopedRefPtrPrinter)
+
+
+class LinkedPtrPrinter(SmartPtrPrinter):
+    typename = 'linked_ptr'
+    def ptr(self):
+        return self.val['value_']
+pp_set.add_printer('linked_ptr', '^linked_ptr<.*>$', LinkedPtrPrinter)
+
+
+class WeakPtrPrinter(SmartPtrPrinter):
+    typename = 'base::WeakPtr'
+    def ptr(self):
+        flag = ScopedRefPtrPrinter(self.val['ref_']['flag_']).ptr()
+        if flag and flag['is_valid_']:
+            return self.val['ptr_']
+        return gdb.Value(0).cast(self.val['ptr_'].type)
+pp_set.add_printer('base::WeakPtr', '^base::WeakPtr<.*>$', WeakPtrPrinter)
+
+
+class CallbackPrinter(Printer):
+    """Callbacks provide no usable information so reduce the space they take."""
+    def to_string(self):
+        return '...'
+pp_set.add_printer('base::Callback', '^base::Callback<.*>$', CallbackPrinter)
+
+
+class LocationPrinter(Printer):
+    def to_string(self):
+        return '%s()@%s:%s' % (self.val['function_name_'].string(),
+                               self.val['file_name_'].string(),
+                               self.val['line_number_'])
+pp_set.add_printer('tracked_objects::Location', '^tracked_objects::Location$',
+                   LocationPrinter)
+
+
+class PendingTaskPrinter(Printer):
+    def to_string(self):
+        return 'From %s' % (self.val['posted_from'],)
+
+    def children(self):
+        for result in yield_fields(self.val):
+            if result[0] not in ('task', 'posted_from'):
+                yield result
+pp_set.add_printer('base::PendingTask', '^base::PendingTask$',
+                   PendingTaskPrinter)
+
+
+class LockPrinter(Printer):
+    def to_string(self):
+        try:
+            if self.val['owned_by_thread_']:
+                return 'Locked by thread %s' % self.val['owning_thread_id_']
+            else:
+                return 'Unlocked'
+        except gdb.error:
+            return 'Unknown state'
+pp_set.add_printer('base::Lock', '^base::Lock$', LockPrinter)
+
+
+class TimeDeltaPrinter(object):
+    def __init__(self, val):
+        self._timedelta = datetime.timedelta(microseconds=int(val['delta_']))
+
+    def timedelta(self):
+        return self._timedelta
+
+    def to_string(self):
+        return str(self._timedelta)
+pp_set.add_printer('base::TimeDelta', '^base::TimeDelta$', TimeDeltaPrinter)
+
+
+class TimeTicksPrinter(TimeDeltaPrinter):
+    def __init__(self, val):
+        self._timedelta = datetime.timedelta(microseconds=int(val['ticks_']))
+pp_set.add_printer('base::TimeTicks', '^base::TimeTicks$', TimeTicksPrinter)
+
+
+class TimePrinter(object):
+    def __init__(self, val):
+        timet_offset = gdb.parse_and_eval(
+            'base::Time::kTimeTToMicrosecondsOffset')
+        self._datetime = (datetime.datetime.fromtimestamp(0) +
+                          datetime.timedelta(microseconds=
+                                             int(val['us_'] - timet_offset)))
+
+    def datetime(self):
+        return self._datetime
+
+    def to_string(self):
+        return str(self._datetime)
+pp_set.add_printer('base::Time', '^base::Time$', TimePrinter)
+
+
+class IpcMessagePrinter(Printer):
+    def header(self):
+        return self.val['header_'].cast(
+            gdb.lookup_type('IPC::Message::Header').pointer())
+
+    def to_string(self):
+        message_type = self.header()['type']
+        return '%s of kind %s line %s' % (
+            self.val.dynamic_type,
+            (message_type >> 16).cast(gdb.lookup_type('IPCMessageStart')),
+            message_type & 0xffff)
+
+    def children(self):
+        yield ('header_', self.header().dereference())
+        yield ('capacity_after_header_', self.val['capacity_after_header_'])
+        for field in self.val.type.fields():
+            if field.is_base_class:
+                continue
+            yield (field.name, self.val[field.name])
+pp_set.add_printer('IPC::Message', '^IPC::Message$', IpcMessagePrinter)
+
+
+class NotificationRegistrarPrinter(Printer):
+    def to_string(self):
+        try:
+            registrations = self.val['registered_']
+            vector_finish = registrations['_M_impl']['_M_finish']
+            vector_start = registrations['_M_impl']['_M_start']
+            if vector_start == vector_finish:
+                return 'Not watching notifications'
+            if vector_start.dereference().type.sizeof == 0:
+                # Incomplete type: b/8242773
+                return 'Watching some notifications'
+            return ('Watching %s notifications; '
+                    'print %s->registered_ for details') % (
+                        int(vector_finish - vector_start),
+                        typed_ptr(self.val.address))
+        except gdb.error:
+            return 'NotificationRegistrar'
+pp_set.add_printer('content::NotificationRegistrar',
+                   '^content::NotificationRegistrar$',
+                   NotificationRegistrarPrinter)
+
+
+class SiteInstanceImplPrinter(object):
+    def __init__(self, val):
+        self.val = val.cast(val.dynamic_type)
+
+    def to_string(self):
+        return 'SiteInstanceImpl@%s for %s' % (
+            self.val.address, self.val['site_'])
+
+    def children(self):
+        yield ('id_', self.val['id_'])
+        yield ('has_site_', self.val['has_site_'])
+        if self.val['browsing_instance_']['ptr_']:
+            yield ('browsing_instance_', self.val['browsing_instance_']['ptr_'])
+        if self.val['process_']:
+            yield ('process_', typed_ptr(self.val['process_']))
+pp_set.add_printer('content::SiteInstanceImpl', '^content::SiteInstanceImpl$',
+                   SiteInstanceImplPrinter)
+
+
+class RenderProcessHostImplPrinter(object):
+    def __init__(self, val):
+        self.val = val.cast(val.dynamic_type)
+
+    def to_string(self):
+        pid = ''
+        try:
+            child_process_launcher_ptr = (
+                self.val['child_process_launcher_']['impl_']['data_']['ptr'])
+            if child_process_launcher_ptr:
+                context = (child_process_launcher_ptr['context_']['ptr_'])
+                if context:
+                    pid = ' PID %s' % str(context['process_']['process_'])
+        except gdb.error:
+            # The definition of the Context type may not be available.
+            # b/8242773
+            pass
+        return 'RenderProcessHostImpl@%s%s' % (self.val.address, pid)
+
+    def children(self):
+        yield ('id_', self.val['id_'])
+        yield ('listeners_',
+               self.val['listeners_']['data_'])
+        yield ('worker_ref_count_', self.val['worker_ref_count_'])
+        yield ('fast_shutdown_started_', self.val['fast_shutdown_started_'])
+        yield ('deleting_soon_', self.val['deleting_soon_'])
+        yield ('pending_views_', self.val['pending_views_'])
+        yield ('visible_widgets_', self.val['visible_widgets_'])
+        yield ('backgrounded_', self.val['backgrounded_'])
+        yield ('widget_helper_', self.val['widget_helper_'])
+        yield ('is_initialized_', self.val['is_initialized_'])
+        yield ('browser_context_', typed_ptr(self.val['browser_context_']))
+        yield ('sudden_termination_allowed_',
+               self.val['sudden_termination_allowed_'])
+        yield ('ignore_input_events_', self.val['ignore_input_events_'])
+        yield ('is_guest_', self.val['is_guest_'])
+pp_set.add_printer('content::RenderProcessHostImpl',
+                   '^content::RenderProcessHostImpl$',
+                   RenderProcessHostImplPrinter)
+
+
+gdb.printing.register_pretty_printer(gdb, pp_set, replace=_DEBUGGING)