scripts/gdb: add cache for type objects (2b514827) · Commits · 戴 / test

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:

Jan 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:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

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

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