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Commit b1503934 authored by Kieran Bingham's avatar Kieran Bingham Committed by Linus Torvalds
Browse files

scripts/gdb: add cpu iterators 

The linux kernel provides macro's for iterating against values from the
cpu_list masks.  By providing some commonly used masks, we can mirror
the kernels helper macros with easy to use generators.

Link: http://lkml.kernel.org/r/d045c6599771ada1999d49612ee30fd2f9acf17f.1462865983.git.jan.kiszka@siemens.com


Signed-off-by: default avatarKieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c1a15399

scripts/gdb/linux/cpus.py

+38 −0
Original line number Diff line number Diff line
@@ -100,6 +100,44 @@ def cpu_list(mask_name): 
        yield cpu





def each_online_cpu():

    for cpu in cpu_list("__cpu_online_mask"):

        yield cpu





def each_present_cpu():

    for cpu in cpu_list("__cpu_present_mask"):

        yield cpu





def each_possible_cpu():

    for cpu in cpu_list("__cpu_possible_mask"):

        yield cpu





def each_active_cpu():

    for cpu in cpu_list("__cpu_active_mask"):

        yield cpu





class LxCpus(gdb.Command):

    """List CPU status arrays



Displays the known state of each CPU based on the kernel masks

and can help identify the state of hotplugged CPUs"""



    def __init__(self):

        super(LxCpus, self).__init__("lx-cpus", gdb.COMMAND_DATA)



    def invoke(self, arg, from_tty):

        gdb.write("Possible CPUs : {}\n".format(list(each_possible_cpu())))

        gdb.write("Present CPUs  : {}\n".format(list(each_present_cpu())))

        gdb.write("Online CPUs   : {}\n".format(list(each_online_cpu())))

        gdb.write("Active CPUs   : {}\n".format(list(each_active_cpu())))



LxCpus()





class PerCpu(gdb.Function):

    """Return per-cpu variable.