forked from mirrors/linux
a77e15e8b4
Yet another code simplification. 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>
103 lines
2.9 KiB
Python
103 lines
2.9 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
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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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module_ptr_type = module_type.get_type().pointer()
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modules = gdb.parse_and_eval("modules")
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entry = modules['next']
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end_of_list = modules.address
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while entry != end_of_list:
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yield utils.container_of(entry, module_ptr_type, "list")
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entry = entry['next']
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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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ref = 0
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module_refptr = module['refptr']
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for cpu in cpus.cpu_list("cpu_possible_mask"):
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refptr = cpus.per_cpu(module_refptr, cpu)
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ref += refptr['incs']
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ref -= refptr['decs']
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gdb.write("{address} {name:<19} {size:>8} {ref}".format(
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address=str(module['module_core']).split()[0],
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name=module['name'].string(),
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size=str(module['core_size']),
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ref=str(ref)))
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source_list = module['source_list']
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t = self._module_use_type.get_type().pointer()
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entry = source_list['next']
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first = True
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while entry != source_list.address:
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use = utils.container_of(entry, 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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entry = entry['next']
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gdb.write("\n")
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LxLsmod()
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