scripts/gdb: add lx_current convenience function
This is a shorthand for *$lx_per_cpu("current_task"), i.e. a convenience function to retrieve the currently running task of the active context. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -66,3 +66,20 @@ Note that VAR has to be quoted as string."""
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PerCpu()
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PerCpu()
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class LxCurrentFunc(gdb.Function):
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"""Return current task.
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$lx_current([CPU]): Return the per-cpu task variable for the given CPU
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number. If CPU is omitted, the CPU of the current context is used."""
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def __init__(self):
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super(LxCurrentFunc, self).__init__("lx_current")
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def invoke(self, cpu=-1):
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var_ptr = gdb.parse_and_eval("¤t_task")
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return per_cpu(var_ptr, cpu).dereference()
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LxCurrentFunc()
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