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scripts/gdb: add cpu iterators

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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: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kieran Bingham 2016-05-23 16:25:02 -07:00 committed by Linus Torvalds
parent c1a153992e
commit b1503934a5
1 changed files with 38 additions and 0 deletions
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38
scripts/gdb/linux/cpus.py
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@ -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.