forked from mirrors/linux
1d7adbc74c
Avoid generating an exception if there are no clocks registered:
(gdb) lx-clk-summary
enable prepare protect
clock count count count rate
------------------------------------------------------------------------
Python Exception <class 'gdb.error'>: No symbol "clk_root_list" in
current context.
Error occurred in Python: No symbol "clk_root_list" in current context.
Link: https://lkml.kernel.org/r/20230323225246.3302977-1-f.fainelli@gmail.com
Fixes: d1e9710b63 ("scripts/gdb: initial clk support: lx-clk-summary")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) NXP 2019
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import gdb
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import sys
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from linux import utils, lists, constants
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clk_core_type = utils.CachedType("struct clk_core")
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def clk_core_for_each_child(hlist_head):
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return lists.hlist_for_each_entry(hlist_head,
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clk_core_type.get_type().pointer(), "child_node")
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class LxClkSummary(gdb.Command):
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"""Print clk tree summary
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Output is a subset of /sys/kernel/debug/clk/clk_summary
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No calls are made during printing, instead a (c) if printed after values which
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are cached and potentially out of date"""
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def __init__(self):
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super(LxClkSummary, self).__init__("lx-clk-summary", gdb.COMMAND_DATA)
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def show_subtree(self, clk, level):
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gdb.write("%*s%-*s %7d %8d %8d %11lu%s\n" % (
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level * 3 + 1, "",
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30 - level * 3,
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clk['name'].string(),
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clk['enable_count'],
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clk['prepare_count'],
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clk['protect_count'],
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clk['rate'],
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'(c)' if clk['flags'] & constants.LX_CLK_GET_RATE_NOCACHE else ' '))
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for child in clk_core_for_each_child(clk['children']):
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self.show_subtree(child, level + 1)
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def invoke(self, arg, from_tty):
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if utils.gdb_eval_or_none("clk_root_list") is None:
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raise gdb.GdbError("No clocks registered")
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gdb.write(" enable prepare protect \n")
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gdb.write(" clock count count count rate \n")
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gdb.write("------------------------------------------------------------------------\n")
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for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_root_list")):
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self.show_subtree(clk, 0)
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for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_orphan_list")):
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self.show_subtree(clk, 0)
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LxClkSummary()
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class LxClkCoreLookup(gdb.Function):
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"""Find struct clk_core by name"""
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def __init__(self):
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super(LxClkCoreLookup, self).__init__("lx_clk_core_lookup")
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def lookup_hlist(self, hlist_head, name):
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for child in clk_core_for_each_child(hlist_head):
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if child['name'].string() == name:
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return child
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result = self.lookup_hlist(child['children'], name)
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if result:
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return result
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def invoke(self, name):
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name = name.string()
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return (self.lookup_hlist(gdb.parse_and_eval("clk_root_list"), name) or
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self.lookup_hlist(gdb.parse_and_eval("clk_orphan_list"), name))
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LxClkCoreLookup()
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