From 9f66dee720984edcbc6ea07ad70fe5b8f0421c04 Mon Sep 17 00:00:00 2001
From: Kieran Bingham <kieran.bingham@linaro.org>
Date: Mon, 23 May 2016 16:25:13 -0700
Subject: [PATCH] scripts/gdb: add lx_thread_info_by_pid helper
The tasks module already provides helpers to find the task struct by
pid, and the thread_info by task struct; however this is cumbersome to
utilise on the gdb commandline.
Wrap these two functionalities together in an extra single helper to
allow exploring the thread info, from a PID value
Link: http://lkml.kernel.org/r/dadc5667f053ec811eb3e3033d99d937fedbc93b.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
scripts/gdb/linux/tasks.py | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py
index 862a4ae24d49..1bf949c43b76 100644
--- a/scripts/gdb/linux/tasks.py
+++ b/scripts/gdb/linux/tasks.py
@@ -114,3 +114,22 @@ variable."""
LxThreadInfoFunc()
+
+
+class LxThreadInfoByPidFunc (gdb.Function):
+ """Calculate Linux thread_info from task variable found by pid
+
+$lx_thread_info_by_pid(PID): Given PID, return the corresponding thread_info
+variable."""
+
+ def __init__(self):
+ super(LxThreadInfoByPidFunc, self).__init__("lx_thread_info_by_pid")
+
+ def invoke(self, pid):
+ task = get_task_by_pid(pid)
+ if task:
+ return get_thread_info(task.dereference())
+ else:
+ raise gdb.GdbError("No task of PID " + str(pid))
+
+LxThreadInfoByPidFunc()