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author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-02-18 00:47:10 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 01:34:54 +0300 |
commit | 4752871081ba4fbb3c539488a95e77d8011bfe49 (patch) | |
tree | de170ba5e2b63cecfd29a1b53353a096bb6691c2 | |
parent | 7704d58a8509c65e3f7e4407ca2e5fa6360349c1 (diff) | |
download | linux-4752871081ba4fbb3c539488a95e77d8011bfe49.tar.xz |
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@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | scripts/gdb/linux/tasks.py | 27 | ||||
-rw-r--r-- | scripts/gdb/vmlinux-gdb.py | 1 |
2 files changed, 28 insertions, 0 deletions
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 |