Commit 116b47b4 authored by Jan Kiszka's avatar Jan Kiszka Committed by Linus Torvalds

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's avatarJan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent fe7f9ed9
......@@ -66,3 +66,20 @@ Note that VAR has to be quoted as string."""
PerCpu()
class LxCurrentFunc(gdb.Function):
"""Return current task.
$lx_current([CPU]): Return the per-cpu task variable for the given CPU
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):
var_ptr = gdb.parse_and_eval("&current_task")
return per_cpu(var_ptr, cpu).dereference()
LxCurrentFunc()
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