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Date: Fri, 6 Jun 2014 19:18:54 +0200 From: Jan Kiszka <jan.kiszka@...mens.com> To: Thomas Gleixner <tglx@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org Cc: Jason Wessel <jason.wessel@...driver.com>, kgdb-bugreport@...ts.sourceforge.net, Andi Kleen <andi@...stfloor.org>, Tom Tromey <tromey@...hat.com>, Ben Widawsky <ben@...dawsk.net>, Borislav Petkov <bp@...e.de>, Tatiana Al-Chueyr Martins <tatiana.alchueyr@...il.com> Subject: [PATCH v8 13/22] scripts/gdb: Add helper and convenience function to look up tasks 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@...mens.com> --- scripts/gdb/linux/tasks.py | 27 +++++++++++++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 1 + 2 files changed, 28 insertions(+) diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py index cd25984..13bb97c 100644 --- a/scripts/gdb/linux/tasks.py +++ b/scripts/gdb/linux/tasks.py @@ -44,3 +44,30 @@ class TaskList: utils.container_of(t['thread_group']['next'], self.task_ptr_type, "thread_group") return t + + +def get_task_by_pid(pid): + for task in TaskList(): + if int(task['pid']) == pid: + return task + return None + + +class LxTaskByPidFunc(gdb.Function): + """Find Linux task by PID and return the task_struct variable. + +$lx_task_by_pid(PID): Given PID, iterate over all tasks of the target and +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 fa66d23..4d7eb2c 100644 --- a/scripts/gdb/vmlinux-gdb.py +++ b/scripts/gdb/vmlinux-gdb.py @@ -26,3 +26,4 @@ else: import linux.symbols import linux.modules import linux.dmesg + import linux.tasks -- 1.8.1.1.298.ge7eed54 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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