Messages in this thread Patch in this message | | | From | Jan Kiszka <> | Subject | [PATCH v7 15/21] scripts/gdb: Add internal helper and convenience function to retrieve thread_info | Date | Tue, 12 Nov 2013 08:14:33 +0100 |
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Add the internal helper get_thread_info that calculates 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/linux/tasks.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py index 13bb97c..63cd6c5 100644 --- a/scripts/gdb/linux/tasks.py +++ b/scripts/gdb/linux/tasks.py @@ -71,3 +71,38 @@ return that task_struct variable which PID matches.""" LxTaskByPidFunc() + + +thread_info_type = utils.CachedType("struct thread_info") + +ia64_task_size = None + + +def get_thread_info(task): + global thread_info_type + thread_info_ptr_type = thread_info_type.get_type().pointer() + if utils.is_target_arch("ia64"): + global ia64_task_size + if ia64_task_size is 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(thread_info_ptr_type) + else: + thread_info = task['stack'].cast(thread_info_ptr_type) + return thread_info.dereference() + + +class LxThreadInfoFunc (gdb.Function): + """Calculate Linux thread_info from task variable. + +$lx_thread_info(TASK): Given TASK, return the corresponding thread_info +variable.""" + + def __init__(self): + super(LxThreadInfoFunc, self).__init__("lx_thread_info") + + def invoke(self, task): + return get_thread_info(task) + + +LxThreadInfoFunc() -- 1.8.1.1.298.ge7eed54
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