Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753701Ab2KEQMz (ORCPT ); Mon, 5 Nov 2012 11:12:55 -0500 Received: from goliath.siemens.de ([192.35.17.28]:19170 "EHLO goliath.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752174Ab2KEQJY (ORCPT ); Mon, 5 Nov 2012 11:09:24 -0500 From: Jan Kiszka To: linux-kernel@vger.kernel.org Cc: Jason Wessel , kgdb-bugreport@lists.sourceforge.net, Andi Kleen , Tony Luck , Fenghua Yu , linux-ia64@vger.kernel.org Subject: [PATCH 10/13] scripts/gdb: Add internal helper and convenience function to retrieve thread_info Date: Mon, 5 Nov 2012 17:09:03 +0100 Message-Id: X-Mailer: git-send-email 1.7.3.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2106 Lines: 69 Add the internal helper get_thread_info that calculated the thread_info from a given task variable. Also export this service as a convenience function. Note: ia64 version is untested. CC: Tony Luck CC: Fenghua Yu CC: linux-ia64@vger.kernel.org Signed-off-by: Jan Kiszka --- scripts/gdb/task.py | 39 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-) diff --git a/scripts/gdb/task.py b/scripts/gdb/task.py index 41d85cc..523e495 100644 --- a/scripts/gdb/task.py +++ b/scripts/gdb/task.py @@ -67,3 +67,42 @@ class LxTaskByPidFunc(gdb.Function): raise gdb.GdbError("No task of PID " + str(pid)) LxTaskByPidFunc() + + +thread_info_ptr_type = None + +def get_thread_info_ptr_type(): + global thread_info_ptr_type + if thread_info_ptr_type == None: + thread_info_ptr_type = get_type('struct thread_info').pointer() + return thread_info_ptr_type + +ia64_task_size = None + +def get_thread_info(task): + if is_target_arch("ia64"): + global ia64_task_size + if ia64_task_size == None: + ia64_task_size = gdb.parse_and_eval( + "sizeof(struct task_struct)") + thread_info_addr = task.address + ia64_task_size + thread_info = thread_info_addr.cast(get_thread_info_ptr_type()) + else: + thread_info = task['stack'].cast(get_thread_info_ptr_type()) + return thread_info.dereference() + + +class LxThreadInfoFunc (gdb.Function): + # Calculate Linux thread_info from task variable. + __doc__ = "Calculate Linux thread_info from task variable.\n" \ + "\n" \ + "$lx_thread_info(TASK): Given TASK, return the corresponding thread_info\n" \ + "variable.\n" + + def __init__(self): + super(LxThreadInfoFunc, self).__init__("lx_thread_info") + + def invoke(self, task): + return get_thread_info(task) + +LxThreadInfoFunc() -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/