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author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-02-17 22:46:38 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 23:34:53 +0100 |
commit | 2b514827ef06fd69e1739e7f367712619dee7784 (patch) | |
tree | c222ab179c1a2af790106882f1b560d417281891 /scripts | |
parent | scripts/gdb: add infrastructure (diff) | |
download | linux-2b514827ef06fd69e1739e7f367712619dee7784.tar.xz linux-2b514827ef06fd69e1739e7f367712619dee7784.zip |
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: 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>
Diffstat (limited to 'scripts')
-rw-r--r-- | scripts/gdb/linux/utils.py | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py new file mode 100644 index 000000000000..f88361130e4c --- /dev/null +++ b/scripts/gdb/linux/utils.py @@ -0,0 +1,34 @@ +# +# 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 |