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author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-02-17 22:47:24 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 23:34:54 +0100 |
commit | 116b47b4da037547585cebe4e3275ef68905d509 (patch) | |
tree | 74c464dcc68c8636cbf5211a335c5651b3de9974 /scripts | |
parent | scripts/gdb: add internal helper and convenience function for per-cpu lookup (diff) | |
download | linux-116b47b4da037547585cebe4e3275ef68905d509.tar.xz linux-116b47b4da037547585cebe4e3275ef68905d509.zip |
scripts/gdb: add lx_current convenience function
This is a shorthand for *$lx_per_cpu("current_task"), i.e. a convenience
function to retrieve the currently running task of the active context.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rw-r--r-- | scripts/gdb/linux/cpus.py | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py index 18337e01ddef..b683da92f194 100644 --- a/scripts/gdb/linux/cpus.py +++ b/scripts/gdb/linux/cpus.py @@ -66,3 +66,20 @@ Note that VAR has to be quoted as string.""" PerCpu() + + +class LxCurrentFunc(gdb.Function): + """Return current task. + +$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("¤t_task") + return per_cpu(var_ptr, cpu).dereference() + + +LxCurrentFunc() |