Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757975AbaKTRK5 (ORCPT ); Thu, 20 Nov 2014 12:10:57 -0500 Received: from david.siemens.de ([192.35.17.14]:43849 "EHLO david.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756023AbaKTRCm (ORCPT ); Thu, 20 Nov 2014 12:02:42 -0500 From: Jan Kiszka To: Thomas Gleixner , linux-kernel@vger.kernel.org Cc: Andrew Morton , Jason Wessel , kgdb-bugreport@lists.sourceforge.net, Andi Kleen , Tom Tromey , Ben Widawsky , Borislav Petkov , Tatiana Al-Chueyr Martins , Tony Luck , Fenghua Yu , linux-ia64@vger.kernel.org Subject: [PATCH v10 15/27] scripts/gdb: Add internal helper and convenience function to retrieve thread_info Date: Thu, 20 Nov 2014 18:01:52 +0100 Message-Id: X-Mailer: git-send-email 1.8.4.5 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 Add the internal helper get_thread_info that calculates 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/linux/tasks.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py index 13bb97c..63cd6c5 100644 --- a/scripts/gdb/linux/tasks.py +++ b/scripts/gdb/linux/tasks.py @@ -71,3 +71,38 @@ return that task_struct variable which PID matches.""" LxTaskByPidFunc() + + +thread_info_type = utils.CachedType("struct thread_info") + +ia64_task_size = None + + +def get_thread_info(task): + global thread_info_type + thread_info_ptr_type = thread_info_type.get_type().pointer() + if utils.is_target_arch("ia64"): + global ia64_task_size + if ia64_task_size is 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(thread_info_ptr_type) + else: + thread_info = task['stack'].cast(thread_info_ptr_type) + return thread_info.dereference() + + +class LxThreadInfoFunc (gdb.Function): + """Calculate Linux thread_info from task variable. + +$lx_thread_info(TASK): Given TASK, return the corresponding thread_info +variable.""" + + def __init__(self): + super(LxThreadInfoFunc, self).__init__("lx_thread_info") + + def invoke(self, task): + return get_thread_info(task) + + +LxThreadInfoFunc() -- 1.8.4.5 -- 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/