From: Jan Kiszka <jan.kiszka@siemens.com>
To: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Jason Wessel <jason.wessel@windriver.com>,
kgdb-bugreport@lists.sourceforge.net,
Andi Kleen <andi@firstfloor.org>, Tom Tromey <tromey@redhat.com>,
Ben Widawsky <ben@bwidawsk.net>, Borislav Petkov <bp@suse.de>
Subject: [PATCH v11 02/28] scripts/gdb: Add cache for type objects
Date: Thu, 29 Jan 2015 07:46:21 +0100 [thread overview]
Message-ID: <85e4fd40dd05cb8317e336cefdcd917ec8078c5b.1422514006.git.jan.kiszka@siemens.com> (raw)
In-Reply-To: <cover.1422514006.git.jan.kiszka@siemens.com>
In-Reply-To: <cover.1422514006.git.jan.kiszka@siemens.com>
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>
---
scripts/gdb/linux/utils.py | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
create mode 100644 scripts/gdb/linux/utils.py
diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py
new file mode 100644
index 0000000..f883611
--- /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
--
2.1.4
next prev parent reply other threads:[~2015-01-29 6:57 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-29 6:46 [PATCH v11 00/28] Add gdb python scripts as kernel debugging helpers Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 01/28] scripts/gdb: Add infrastructure Jan Kiszka
2015-01-29 13:23 ` Michal Marek
2015-01-29 13:37 ` Jan Kiszka
2015-01-29 6:46 ` Jan Kiszka [this message]
2015-01-29 6:46 ` [PATCH v11 03/28] scripts/gdb: Add container_of helper and convenience function Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 04/28] scripts/gdb: Add module iteration class Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 05/28] scripts/gdb: Add lx-symbols command Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 06/28] module: Do not inline do_init_module Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 07/28] scripts/gdb: Add automatic symbol reloading on module insertion Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 08/28] scripts/gdb: Add internal helper and convenience function to look up a module Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 09/28] scripts/gdb: Add get_target_endianness helper Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 10/28] scripts/gdb: Add read_u16/32/64 helpers Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 11/28] scripts/gdb: Add lx-dmesg command Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 12/28] scripts/gdb: Add task iteration class Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 13/28] scripts/gdb: Add helper and convenience function to look up tasks Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 14/28] scripts/gdb: Add is_target_arch helper Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 15/28] scripts/gdb: Add internal helper and convenience function to retrieve thread_info Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 16/28] scripts/gdb: Add get_gdbserver_type helper Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 17/28] scripts/gdb: Add internal helper and convenience function for per-cpu lookup Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 18/28] scripts/gdb: Add lx_current convenience function Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 19/28] scripts/gdb: Add class to iterate over CPU masks Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 20/28] scripts/gdb: Add lx-lsmod command Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 21/28] scripts/gdb: Add basic documentation Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 22/28] scripts/gdb: Port to python3 / gdb7.7 Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 23/28] scripts/gdb: Ignore byte-compiled python files Jan Kiszka
2015-01-29 13:15 ` Michal Marek
2015-01-29 13:35 ` Jan Kiszka
2015-01-29 14:34 ` Daniel Thompson
2015-01-29 14:41 ` Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 24/28] scripts/gdb: Use a generator instead of iterator for task list Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 25/28] scripts/gdb: Convert ModuleList to generator function Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 26/28] scripts/gdb: Convert CpuList " Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 27/28] scripts/gdb: Define maintainer Jan Kiszka
2015-01-29 6:46 ` [PATCH v11 28/28] scripts/gdb: Disable pagination while printing from breakpoint handler Jan Kiszka
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