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958ef8a09a
If CONFIG_MODULES is not enabled, lx-lsmod tries to find a non-existent
symbol and generates an unfriendly traceback:
(gdb) lx-lsmod
Address Module Size Used by
Traceback (most recent call last):
File "scripts/gdb/linux/modules.py", line 75, in invoke
for module in module_list():
File "scripts/gdb/linux/modules.py", line 24, in module_list
module_ptr_type = module_type.get_type().pointer()
File "scripts/gdb/linux/utils.py", line 28, in get_type
self._type = gdb.lookup_type(self._name)
gdb.error: No struct type named module.
Error occurred in Python command: No struct type named module.
Catch the error and return an empty module_list() for a clean command
output as follows:
(gdb) lx-lsmod
Address Module Size Used by
(gdb)
Link: http://lkml.kernel.org/r/94d533819437408b85ae5864f939dd7ca6fbfcd6.1462865983.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>
95 lines
2.5 KiB
Python
95 lines
2.5 KiB
Python
#
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# gdb helper commands and functions for Linux kernel debugging
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#
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# module tools
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#
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# Copyright (c) Siemens AG, 2013
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#
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# Authors:
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# Jan Kiszka <jan.kiszka@siemens.com>
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#
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# This work is licensed under the terms of the GNU GPL version 2.
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#
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import gdb
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from linux import cpus, utils, lists
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module_type = utils.CachedType("struct module")
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def module_list():
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global module_type
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modules = utils.gdb_eval_or_none("modules")
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if modules is None:
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return
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module_ptr_type = module_type.get_type().pointer()
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for module in lists.list_for_each_entry(modules, module_ptr_type, "list"):
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yield module
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def find_module_by_name(name):
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for module in module_list():
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if module['name'].string() == name:
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return module
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return None
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class LxModule(gdb.Function):
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"""Find module by name and return the module variable.
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$lx_module("MODULE"): Given the name MODULE, iterate over all loaded modules
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of the target and return that module variable which MODULE matches."""
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def __init__(self):
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super(LxModule, self).__init__("lx_module")
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def invoke(self, mod_name):
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mod_name = mod_name.string()
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module = find_module_by_name(mod_name)
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if module:
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return module.dereference()
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else:
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raise gdb.GdbError("Unable to find MODULE " + mod_name)
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LxModule()
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class LxLsmod(gdb.Command):
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"""List currently loaded modules."""
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_module_use_type = utils.CachedType("struct module_use")
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def __init__(self):
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super(LxLsmod, self).__init__("lx-lsmod", gdb.COMMAND_DATA)
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def invoke(self, arg, from_tty):
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gdb.write(
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"Address{0} Module Size Used by\n".format(
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" " if utils.get_long_type().sizeof == 8 else ""))
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for module in module_list():
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layout = module['core_layout']
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gdb.write("{address} {name:<19} {size:>8} {ref}".format(
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address=str(layout['base']).split()[0],
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name=module['name'].string(),
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size=str(layout['size']),
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ref=str(module['refcnt']['counter'] - 1)))
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t = self._module_use_type.get_type().pointer()
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first = True
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sources = module['source_list']
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for use in lists.list_for_each_entry(sources, t, "source_list"):
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gdb.write("{separator}{name}".format(
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separator=" " if first else ",",
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name=use['source']['name'].string()))
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first = False
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gdb.write("\n")
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LxLsmod()
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