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276d97d90a
I tried to use these scripts in an ubuntu 14.04 host (gdb 7.7 compiled
against python 3.3) but there were several errors.
I believe this patch fixes these issues so that the commands now work (I
tested lx-symbols, lx-dmesg, lx-lsmod).
Main issues that needed to be resolved:
* In python 2 iterators have a "next()" method. In python 3 it is
__next__() instead (so let's just add both).
* In older python versions there was an implicit conversion
in object.__format__() (used when an object is in string.format())
where it was converting the object to str first and then
calling str's __format__(). This has now been removed so
we must explicitly convert to str the objects for which
we need to keep this behavior.
* In dmesg.py: in python 3 log_buf is now a "memoryview" object
which needs to be converted to a string in order to use string
methods like "splitlines()". Luckily memoryview exists in
python 2.7.6 as well, so we can convert log_buf to memoryview
and use the same code in both python 2 and python 3.
This version of the patch has now been tested with gdb 7.7 and both python
3.4 and python 2.7.6 (I think asking for at least python 2.7.6 is a
reasonable requirement instead of complicating the code with version
checks etc).
Signed-off-by: Pantelis Koukousoulas <pktoss@gmail.com>
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>
110 lines
2.9 KiB
Python
110 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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# task & thread tools
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#
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# Copyright (c) Siemens AG, 2011-2013
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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 utils
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task_type = utils.CachedType("struct task_struct")
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class TaskList:
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def __init__(self):
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global task_type
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self.task_ptr_type = task_type.get_type().pointer()
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self.init_task = gdb.parse_and_eval("init_task")
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self.curr_group = self.init_task.address
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self.curr_task = None
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def __iter__(self):
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return self
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def __next__(self):
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t = self.curr_task
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if not t or t == self.curr_group:
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self.curr_group = \
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utils.container_of(self.curr_group['tasks']['next'],
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self.task_ptr_type, "tasks")
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if self.curr_group == self.init_task.address:
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raise StopIteration
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t = self.curr_task = self.curr_group
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else:
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self.curr_task = \
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utils.container_of(t['thread_group']['next'],
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self.task_ptr_type, "thread_group")
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return t
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def next(self):
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return self.__next__()
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def get_task_by_pid(pid):
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for task in TaskList():
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if int(task['pid']) == pid:
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return task
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return None
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class LxTaskByPidFunc(gdb.Function):
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"""Find Linux task by PID and return the task_struct variable.
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$lx_task_by_pid(PID): Given PID, iterate over all tasks of the target and
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return that task_struct variable which PID matches."""
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def __init__(self):
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super(LxTaskByPidFunc, self).__init__("lx_task_by_pid")
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def invoke(self, pid):
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task = get_task_by_pid(pid)
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if task:
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return task.dereference()
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else:
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raise gdb.GdbError("No task of PID " + str(pid))
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LxTaskByPidFunc()
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thread_info_type = utils.CachedType("struct thread_info")
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ia64_task_size = None
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def get_thread_info(task):
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global thread_info_type
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thread_info_ptr_type = thread_info_type.get_type().pointer()
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if utils.is_target_arch("ia64"):
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global ia64_task_size
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if ia64_task_size is None:
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ia64_task_size = gdb.parse_and_eval("sizeof(struct task_struct)")
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thread_info_addr = task.address + ia64_task_size
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thread_info = thread_info_addr.cast(thread_info_ptr_type)
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else:
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thread_info = task['stack'].cast(thread_info_ptr_type)
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return thread_info.dereference()
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class LxThreadInfoFunc (gdb.Function):
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"""Calculate Linux thread_info from task variable.
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$lx_thread_info(TASK): Given TASK, return the corresponding thread_info
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variable."""
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def __init__(self):
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super(LxThreadInfoFunc, self).__init__("lx_thread_info")
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def invoke(self, task):
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return get_thread_info(task)
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LxThreadInfoFunc()
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