From 4752871081ba4fbb3c539488a95e77d8011bfe49 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 17 Feb 2015 13:47:10 -0800 Subject: 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 Cc: Thomas Gleixner Cc: Jason Wessel Cc: Andi Kleen Cc: Ben Widawsky Cc: Borislav Petkov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/gdb/linux/tasks.py | 27 +++++++++++++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 1 + 2 files changed, 28 insertions(+) (limited to 'scripts/gdb') diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py index cd259846ab4b..13bb97cd3312 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 fa66d23ea563..4d7eb2c409aa 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 -- cgit v1.2.3