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Date: Mon, 5 Nov 2012 17:09:06 +0100
From: Jan Kiszka <jan.kiszka@...mens.com>
To: linux-kernel@...r.kernel.org
Cc: Jason Wessel <jason.wessel@...driver.com>,
kgdb-bugreport@...ts.sourceforge.net,
Andi Kleen <andi@...stfloor.org>
Subject: [PATCH 13/13] scripts/gdb: Add lx_current convenience function
This is a shorthand for *$lx_per_cpu("current_task"), i.e. a convenience
function to retrieve the currently running task of the active context.
Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
scripts/gdb/percpu.py | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/scripts/gdb/percpu.py b/scripts/gdb/percpu.py
index 6e24400..ecf72b6 100644
--- a/scripts/gdb/percpu.py
+++ b/scripts/gdb/percpu.py
@@ -59,3 +59,18 @@ class PerCpu(gdb.Function):
return per_cpu(var_name.string(), cpu)
PerCpu()
+
+
+class LxCurrentFunc(gdb.Function):
+ __doc__ = "Return current task.\n" \
+ "\n" \
+ "$lx_current([CPU]): Return the per-cpu task variable for the given CPU\n" \
+ "number. If CPU is omitted, the CPU of the current context is used."
+
+ def __init__(self):
+ super(LxCurrentFunc, self).__init__("lx_current")
+
+ def invoke(self, cpu = -1):
+ return per_cpu("current_task", cpu).dereference()
+
+LxCurrentFunc()
--
1.7.3.4
--
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