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>,
Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
linux-ia64@vger.kernel.org
Subject: [PATCH v11 15/28] scripts/gdb: Add internal helper and convenience function to retrieve thread_info
Date: Thu, 29 Jan 2015 07:46:34 +0100 [thread overview]
Message-ID: <20dac87a0153e7983c872ba7804beade610ce55d.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>
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 <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: linux-ia64@vger.kernel.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
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()
--
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 ` [PATCH v11 02/28] scripts/gdb: Add cache for type objects Jan Kiszka
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 ` Jan Kiszka [this message]
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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