Messages in this thread Patch in this message |  | | From | Jan Kiszka <> | Subject | [PATCH v5 12/20] scripts/gdb: Add helper and convenience function to look up tasks | Date | Tue, 29 Jan 2013 13:37:55 +0100 |
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Add the helper task_by_pid that can look up a task by its PID. Also export it as a convenience function.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> --- scripts/gdb/task.py | 29 +++++++++++++++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 1 + 2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/scripts/gdb/task.py b/scripts/gdb/task.py index 6b73dbf..fe42eb0 100644 --- a/scripts/gdb/task.py +++ b/scripts/gdb/task.py @@ -33,3 +33,32 @@ def for_each_task(func, arg = None): task_ptr_type, "thread_group") if t == g: break + +def get_task_by_pid(pid): + def match_pid(t, arg): + if int(t['pid']) == arg['pid']: + arg['task'] = t + + arg = { 'pid': pid, 'task': None } + for_each_task(match_pid, arg) + + return arg['task'] + + +class LxTaskByPidFunc(gdb.Function): + __doc__ = "Find Linux task by PID and return the task_struct variable.\n" \ + "\n" \ + "$lx_task_by_pid(PID): Given PID, iterate over all tasks of the target and\n" \ + "return that task_struct variable which PID matches." + + def __init__(self): + super(LxTaskByPidFunc, self).__init__("lx_task_by_pid") + + def invoke(self, pid): + task = get_task_by_pid(pid) + if task: + return task.dereference() + else: + raise gdb.GdbError("No task of PID " + str(pid)) + +LxTaskByPidFunc() diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py index 4a5685b..e1c5dbc 100644 --- a/scripts/gdb/vmlinux-gdb.py +++ b/scripts/gdb/vmlinux-gdb.py @@ -25,3 +25,4 @@ else: import symbols import module import dmesg + import task -- 1.7.3.4
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