Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2b514827 authored by Jan Kiszka's avatar Jan Kiszka Committed by Linus Torvalds
Browse files

scripts/gdb: add cache for type objects 



Type lookups are very slow in gdb-python which is often noticeable when
iterating over a number of objects.  Introduce the helper class CachedType
that keeps a reference to a gdb.Type object but also refreshes it after an
object file has been loaded.

Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3ee7b3fa

scripts/gdb/linux/utils.py

0 → 100644
+34 −0
Original line number Diff line number Diff line 
#

# gdb helper commands and functions for Linux kernel debugging

#

#  common utilities

#

# Copyright (c) Siemens AG, 2011-2013

#

# Authors:

#  Jan Kiszka <jan.kiszka@siemens.com>

#

# This work is licensed under the terms of the GNU GPL version 2.

#



import gdb





class CachedType:

    def __init__(self, name):

        self._type = None

        self._name = name



    def _new_objfile_handler(self, event):

        self._type = None

        gdb.events.new_objfile.disconnect(self._new_objfile_handler)



    def get_type(self):

        if self._type is None:

            self._type = gdb.lookup_type(self._name)

            if self._type is None:

                raise gdb.GdbError(

                    "cannot resolve type '{0}'".format(self._name))

            if hasattr(gdb, 'events') and hasattr(gdb.events, 'new_objfile'):

                gdb.events.new_objfile.connect(self._new_objfile_handler)

        return self._type