Messages in this thread Patch in this message | | | From | Jan Kiszka <> | Subject | [PATCH 10/13] scripts/gdb: Add internal helper and convenience function to retrieve thread_info | Date | Wed, 3 Oct 2012 13:21:41 +0200 |
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From: Jan Kiszka <jan.kiszka@siemens.com>
Add the internal helper get_thread_info that calculated the thread_info from a given task variable. Also export this service as a convenience function.
Note: ia64 version is untested.
CC: Tony Luck <tony.luck@intel.com> CC: Fenghua Yu <fenghua.yu@intel.com> CC: linux-ia64@vger.kernel.org Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> --- scripts/gdb/task.py | 39 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/scripts/gdb/task.py b/scripts/gdb/task.py index 41d85cc..523e495 100644 --- a/scripts/gdb/task.py +++ b/scripts/gdb/task.py @@ -67,3 +67,42 @@ class LxTaskByPidFunc(gdb.Function): raise gdb.GdbError("No task of PID " + str(pid)) LxTaskByPidFunc() + + +thread_info_ptr_type = None + +def get_thread_info_ptr_type(): + global thread_info_ptr_type + if thread_info_ptr_type == None: + thread_info_ptr_type = get_type('struct thread_info').pointer() + return thread_info_ptr_type + +ia64_task_size = None + +def get_thread_info(task): + if is_target_arch("ia64"): + global ia64_task_size + if ia64_task_size == None: + ia64_task_size = gdb.parse_and_eval( + "sizeof(struct task_struct)") + thread_info_addr = task.address + ia64_task_size + thread_info = thread_info_addr.cast(get_thread_info_ptr_type()) + else: + thread_info = task['stack'].cast(get_thread_info_ptr_type()) + return thread_info.dereference() + + +class LxThreadInfoFunc (gdb.Function): + # Calculate Linux thread_info from task variable. + __doc__ = "Calculate Linux thread_info from task variable.\n" \ + "\n" \ + "$lx_thread_info(TASK): Given TASK, return the corresponding thread_info\n" \ + "variable.\n" + + def __init__(self): + super(LxThreadInfoFunc, self).__init__("lx_thread_info") + + def invoke(self, task): + return get_thread_info(task) + +LxThreadInfoFunc() -- 1.7.3.4
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